cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: add modern hush as parser for run_command*()

Enables using, in code, modern hush as parser for run_command function family.
It also enables the command run to be used by CLI user of modern hush.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Add functions to be called from run_command()

run_command() is called internally by the command run and it can also be called
directly from U-Boot code, e.g. to do unit tests.
This commit adds this path to go to modern hush.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable variables expansion for modern hush

Enables variables expansion for modern hush, both for local and environment
variables.
So the following commands:
foo=bar
echo $foo
setenv bar foo
echo $bar
leads to "bar" and "foo" being printed on console output.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: Enables using modern hush parser as command line parser

If one defines HUSH_MODERN_PARSER, it is then possible to use modern parser with:
=> cli get
old
=> cli set modern
=> cli get
modern

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: Port upstream Busybox hush to U-Boot

Adds new file cli_hush_upstream.c, it is a copy of Busybox hush file as it was of
time to commit 37460f5da.
This commit modifies Busybox hush to not compile some part specific to Busybox
and adds some code needed by U-Boot.
The modifications consists mainly on adding code #if(n)def guards.

For the moment, this refurbished flavor of hush only permits running command
without any keywords (i.e., if and for are not recognized) or variable expansion
(i.e., echo $foo prints foo and not value stored in variable foo).

A new file was also added to define some functions specific to U-Boot.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Signed-off-by: Harald Seiler <hws@denx.de>

cli: Add Busybox upstream hush.c file

This commit adds new file cli_hush_upstream.c, it is a copy of Busybox hush
file it was of time to Busybox commit 37460f5da.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: modern_hush: Add upstream commits up to 2nd October 2023.

This commit adds the following hush busybox upstream commits:
791b222dd55d ("sleep: fix "sleep -- ARGS"")
5353df91cba7 ("Update applet size estimates")
e41e481fd571 ("hush: fix a compile failure")
07a95cfcabb0 ("ash: disable check for "good" function name, bash does not check this")
e5692e2342c6 ("hush: quote values in "readonly" output")
96769486e20f ("shell: move varcmp() to shell_common.h and use it in hush")
bab8828b0dad ("hush: fix expansion of space in "a=${a:+$a }c" construct")
b5be8da350b5 ("hush: make "false" built-in")
6824298ab4d3 ("hush: fix ELIF cmd1;cmd2 THEN ... not executing cmd2, closes 15571")
3a7f00eadcf4 ("hush: add comment about abort on syntax error %{^}")
acae889dd972 ("ash,hush: tab completion of functions and aliases")
90b607d79a13 ("hush: quote variable values printed by "set" (match ash behavior)")
6748e6494c22 ("hush (NOMMU): fix LINENO in execed children")
fd5fb2d2b596 ("hush: speed up "big heredoc" code")
1409432d072e ("hush: add TODO comment")
93ae7464e6e4 ("hush: restore SIGHUP handling, this time explain why we do what we do")
1fdb33bd07e5 ("hush: restore tty pgrp on SIGHUP")
6101b6d3eaa0 ("hush: remove special handling of SIGHUP")
93e0898c663a ("shell: fix SIGWINCH and SIGCHLD (in hush) interrupting line input, closes 15256")
969e00816835 ("hush: code shrink")
27be0e8cfeb6 ("shell: fix compile failures in some configs")
7d1c7d833785 ("ash,hush: use HOME for tab completion and prompts")
21afddefd258 ("hush: fix "error: invalid preprocessing directive ##"")
e53c7dbafc78 ("hush: fix set -n to act immediately, not just after run_list()")
574b9c446da1 ("hush: fix var_LINENO3.tests failure")
49bcf9f40cff ("hush: speed up ${x//\*/|} too")
53b2fdcdba4c ("*: add NOINLINEs where code noticeably shrinks")
7c3e96d4b3d4 ("shell: use more compact SHELL_ASH / HUSH config defines. no code changes")
62f1eed1e191 ("hush: in a comment, document what -i might be doing")
aaf3d5ba74c5 ("shell: tweak --help")
db5546ca1018 ("libbb: code shrink: introduce and use [_]exit_SUCCESS()")
931c55f9e2b4 ("libbb: invert the meaning of SETUP_ENV_NO_CHDIR -> SETUP_ENV_CHDIR")
12566e7f9b5e ("ash,hush: fix handling of SIGINT while waiting for interactive input")
987be932ed3c ("*: slap on a few ALIGN_PTR where appropriate")

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>

cli: hush_modern: Enable loops

Enables the use of for, while and until loops for command line as
well as with run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable if keyword

Adds support for "if then else" construct both for command line interface and
through run_command().

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cli: hush_modern: Enable using < and > as string compare operators

In Busybox hush, '<' and '>' are used as redirection operators.
For example, cat foo > bar will write content of file foo inside file bar.
In U-Boot, we do not have file system, so we can hardly redirect command output
inside a file.

But, in actual U-Boot hush, these operators ('<' and '>') are used as string
compare operators.
For example, test aaa < bbb returns 0 as aaa is before bbb in the dictionary.
Busybox hush also permits this, but operators need to be escaped ('\<' and
'\>').
Indeed, if escaping is needed it permits the developer to think about its code,
as in a lot of case, we want to compare integers (using '-lt' or '-gt') rather
than strings.

As testing in U-Boot is handled by the test command, we will stick with the
original behaviour and not adapt to Busybox one.

Nonetheless, if one day we decide to implement test with '[[ ]]', we will then
stick to upstream Busybox behavior.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>