bin: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

bin: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

sh: introduce a function to iterate over all aliases

Currently the data structure holding alias information is opaque for
consumers outside alias.c and there is no way to iterate over all
aliases, which will become needed by a future commit.

The new function "iteralias" takes a null pointer to return the first
alias or an existing alias to return the next one, unless there is
no alias to return, in which case it returns a null pointer.

I slightly changed the static function hashalias so that it returns the
index into the array holding link heads, and not the link head directly.
In this form it's easier to use by iteralias and the slight adjustment
in the three existing callers doesn't look too bad.

Differential Revision: https://reviews.freebsd.org/D40619

Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

sh: Fix use after free when resetting an in-use alias.

The special case of modifying an existing alias does not work correctly if
the alias is currently in use. Instead, handle this case by unaliasing the
old alias (if any) and then creating a new alias.

sh: Fix unalias -a while an alias is currently in use.

It is a rare situation to modify aliases while an alias is currently in use,
but this is handled for plain unalias. Handle it for unalias -a as well.

sh: Remove an XXX comment: it is normal for builtins to use argptr.

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by: Jan Schaumann <jschauma@stevens.edu>
Pull Request: https://github.com/freebsd/freebsd/pull/96

sh: Don't hash alias name when there are no aliases.

sh: Fix some arithmetic undefined behaviour.

Fix shifts of possibly negative numbers found with ubsan and avoid signed
integer overflow when hashing an extremely long command name.

MFC after: 1 week

sh: Fix possible memory leaks and double frees with unexpected SIGINT.

sh: Solve the alias recursion problem in a less hackish way.

Add the space to avoid alias recursion when the alias is expanded, not when
it is added.

As a result, displaying an alias via command -v, command -V or type no
longer erroneously appends a space. Adjust the tests so they now require
this bug to be absent.

sh: Recognize "--" as end of options in alias builtin.

Aliases starting with "-" (which are non-POSIX) will need to be preceded by
an alias not starting with "-" or the newly added "--".

sh: Fix two issues when an alias is redefined:

* The last character is not displayed.
* If the alias ends with itself (as a word), an infinite memory-eating loop
occurs.

If an alias is defined initially, a space is appended to avoid recursion but
this did not happen when an alias was later modified.

PR: bin/173418
Submitted by: Daniel F.
MFC after: 1 week

sh: Fix duplicate prototypes for builtins.

Have mkbuiltins write the prototypes for the *cmd functions to builtins.h
instead of builtins.c and include builtins.h in more .c files instead of
duplicating prototypes for *cmd functions in other headers.

sh: Reduce more needless differences between error messages.

sh: Remove special code for shell scripts without magic number.

These are called "shell procedures" in the source.

If execve() failed with [ENOEXEC], the shell would reinitialize itself
and execute the program as a script. This requires a fair amount of code
which is not frequently used (most scripts have a #! magic number).
Therefore just execute a new instance of sh (_PATH_BSHELL) to run the
script.

sh: Add a function to print warnings (with command name and newline).
This is like error() but without raising an exception.
It is particularly useful as a replacement for the warnx macro in
bltin/bltin.h.

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

In the spirit of r90111, depend on c89 and remove the "STATIC" macro
and its usage.

Consistently use "STATIC" for all functions in order to be able to set
breakpoints with in a debugger. And use naked "static" for variables.

Noticed by: bde

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

sh: Constify various strings.

Most of this is adding const keywords, but setvar() in var.c had to be
changed somewhat more.

be more type correct and align local ckmalloc() with its underlying malloc(3) by using a "size_t" instead of an "int" argument

- Apply the r190270 changes to printing of single aliases too.
- Sort the aliases before printing them.

Make the output of the alias built-in POSIX-compliant: Drop the leading 'alias'
and suppress printing the trailing space which is added for internal purposes.

- Import the HEAD csup code which is the basis for the cvsmode work.

use 'const' for the parameters of the two static functions unalias() and hashalias()

remove an unnecessary include

Return 1 from the unalias builtin if _any_ removal fails, not just the last
one.

Use prototypes in the MKINIT lines collected by mkinit.

Remove clause 3 from the UCB licenses.

OK'ed by: imp, core

Changes following CScout analysis:

- Removed dead declarations
- Made objects that should have been declared as static, static.

The changes use STATIC instead of static, following the existing
convention in the rest of the code.

Approved by: schweikh (mentor)
MFC after: 2 weeks

Consistently use FBSDID

Quote alias values in the output of the alias(1) builtin so they are
suitable for re-input to the shell (SUSv3)

o __P has been reoved
o Old-style K&R declarations have been converted to new C89 style
o register has been removed
o prototype for main() has been removed (gcc3 makes it an error)
o int main(int argc, char *argv[]) is the preferred main definition.
o Attempt to not break style(9) conformance for declarations more than
they already are.
o Change
int
foo() {
...
to
int
foo(void)
{
...

Fixd with alias missing.

PR: bin/19475
Approved by: Martin Cracauer <cracauer@cons.org> (with conditions)

$Id$ -> $FreeBSD$

Various spelling/formatting changes.

Submitted by: Philippe Charnier <charnier@xp11.frmug.org>

Add rcsid. Spelling.

Use the __unused attribute where warranted.

Nuke register keyword usage and #if -> #ifdef.

Obtained from: NetBSD

Revert $FreeBSD$ to $Id$

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

Merge in NetBSD mods and -Wall cleaning.

Obtained from: NetBSD, me

Merge of 4.4-Lite2 sh source, plus some gcc -Wall cleaning. This is a
merge of parallel duplicate work by Steve Price and myself. :-]

There are some changes to the build that are my fault... mkinit.c was
trying (poorly) to duplicate some of the work that make(1) is designed to
do. The Makefile hackery is my fault too, the depend list was incomplete
because of some explicit OBJS+= entries, so mkdep wasn't picking up their
source file #includes.

This closes a pile of /bin/sh PR's, but not all of them..

Submitted by: Steve Price <steve@bonsai.hiwaay.net>, peter

Import the 4.4BSD-Lite2 /bin/sh sources

Requested by: joerg

(Note, this is mostly going to be conflicts, which is expected. Our entire
sh source has a mainline, so this should not change anything except for
a few new files appearing. I dont think they are a problem)

Remove trailing whitespace.

Reviewed by: phk

Added $Id$

BSD 4.4 Lite bin Sources