ctags: Use C99 bool instead of defining our own

Use stdbool.h definitions instead of defining non-standard ones.

Signed-off-by: Collin Funk <collin.funk1@gmail.com>

Reviewed by: markj
MFC after: 2 weeks
Pull Request: https://github.com/freebsd/freebsd-src/pull/1107

Remove copyright strings ifdef'd out

We've ifdef'd out the copyright strings for some time now. Go ahead and
remove the ifdefs. Plus whatever other detritis was left over from other
recent removals. These copyright strings are present in the comments and
are largely from CSRG's attempt at adding their copyright to every
binary file (which modern interpretations of the license doesn't
require).

Sponsored by: Netflix

usr.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

Remove $FreeBSD$: one-line .c pattern

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

Mark usage function as __dead2 in programs where it does not return

In most cases, usage does not return, so mark them as __dead2. For the
cases where they do return, they have not been marked __dead2.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/735

ctags: Support writing to stdout instead of a file.

* Understand "-" to mean stdout as per convention.
* Check that the output is a regular file and ignore -u if not, otherwise we might try to rm /dev/stdout.
* As a bonus, if -u was specified but the output file does not exist, proceed as if -u had not been specified instead of erroring out.

MFC after: 1 week
Sponsored by: Klara, Inc.
Reviewed by: cracauer, debdrup
Differential Revision: https://reviews.freebsd.org/D40237

ctags: Error out if writing to stdout failed.

MFC after: 1 week
Sponsored by: Klara, Inc.
Reviewed by: cracauer, allanjude
Differential Revision: https://reviews.freebsd.org/D40200

General further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

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

Remove the advertising clause from UCB copyrighted files in usr.bin. This
is in accordance with the information provided at
ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change

Also add $FreeBSD$ to a few files to keep svn happy.

Discussed with: imp, rwatson

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

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.

Change a char that is used as an index into an array into an unisgned char.
Add a missing new style function definition.

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

Fix type mismatch between char * and unsigned char *. C guarantees that
the values of the characters here are positive, so it's safe to index arrays
with them.

It was pointed out[0] that ctags(1) uses some potentially dangerous
system(3) calls where user-supplied data is used with no sanity
checking. Since ctags(1) is not setuid and is not likely to be used
in a privileged situation, this is not a big deal. However, the
fix is relatively easy and less ugly than the current code, let's be
safe. (I'm sure there are about 2^134 other system(3) calls like this
out there.)

[0] On freebsd-security by Roman Bogorodskiy <bogorodskiy@inbox.ru>
with subject "ctags(1) command execution vulnerability."

MFC after: 3 days

ANSIify function definitions to avoid a warning.

Sort entries by locale collating order when -x is specified.

Create tags for typedefs, structs, unions and enums by default (imply the
-t option). Make a new option, -T, to revert to the old behaviour.

Avoid buffer overrun when identifies or filenames are extremely long.

OpenBSD revisions: C.c 1.4-1.5, ctags.c 1.5, fortran.c 1.3, lisp.c 1.3,
tree.c 1.2

Obtained from: OpenBSD

Exit non-zero if the tags file cannot be opened.

remove __P

Remove unused #includes. lex -> Lex, yacc -> Yacc, ... Some .Nm to .Em
conversions. Sort #includes. Spelling. use errx() instead of err() when
explicit message is given.

Style improvements recommended by Bruce as a follow up to some
of the recent WARNS commits. The idea is:

1) FreeBSD id tags should follow vendor tags.
2) Vendor tags should not be compiled (though copyrights probably should).
3) There should be no blank line between including cdefs and __FBSDIF.

Use __FBSDID().

WARNS=2 fixup.

Add $FreeBSD$

MFC after: 2 weeks

Add braces to avoid ambigious else.

Tweaks to allow compiling -Wall (mostly adding "const" to char rcsid[]).

-Wall cleanup.

Finish importing Lite2's src/usr.bin, except for ex, diff, grep, mail,
pascal and vmstat.sparc. All changed files on the vendor branch should
already have been imported.

Add usage string. Typo in man page.

compare return value from getopt against -1 rather than EOF, per the final
posix standard on the topic.

Add newline, closes bin/1433

BSD 4.4 Lite Usr.bin Sources