usr.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

Remove $FreeBSD$: one-line .c pattern

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

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

killall(1): allow sending signals to processes with control terminal on pts(4)

PR: 268093
Reviewed by: kib
MFC after: 1 week

Revert r352953: Convert pnmatch to single element array in regexec calls

Requested by: cem

Convert pnmatch to single element array in regexec calls

The regexec function is declared as taking an array of regmatch_t
elements, and passing in the pointer to singleton element, while
correct, triggers a Coverity warning. Convert the singleton into
an array of one to silence the warning.

Reported by: Coverity
Coverity CID: 1009732, 1009733
MFC after: 2 weeks

various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

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.

No functional change intended.

Adjust printf format specifiers for dev_t and ino_t in user space.

ino_t and dev_t are about to become uint64_t.

Reviewed by: kib, mckusick

Re-work r260800 to include other signals which start with 'I'
such as ILL, INFO etc..

Submitted by: delphij
MFC after: 2 weeks

fix a regression introduced in r237618 that would result in
killall confusing killall -INT with killall -I (interactive
confirmation) which resulted in the wrong signal (TERM)
being delivered to the process(s).

Discussed with: delphij
MFC after: 2 weeks

killall: add -q flag to suppress error message when no processes are matched

Man-page text provided by wblock.

PR: bin/30542
Submitted by: Tony Finch <dot@dotat.at> (original version)
MFC after: 1 week

Once in a month, when the moon is full, killall mistakenly considers
living process as a zombie and refuses to kill it. The cause is that
the code masks ki_stat with SZOMB to compare with SZOMB, but ki_stat
is not a mask.

Possibly reported by: cperciva
MFC after: 3 days

killall(1) does not use libkvm.

MFC after: 3 days

Only initialize array of mibs once.

MFC after: 3 days

Initialize procs closer to the place were it is used.
Free can properly handle NULL pointer (but keep free() call on the premise
that the code might be reused).
Show errno when realloc failed.

MFC after: 3 days

Add a -I flag which requests confirmation before action, like what is done
in pkill(1).

MFC after: 2 weeks

Simplify various code that allowed for sys_signame being lower case.

This was changed in r218285.

Make sys_signame upper case.

This matches the constants from <signal.h> with 'SIG' removed, which POSIX
requires kill and trap to accept and 'kill -l' to write.

'kill -l', 'trap', 'trap -l' output is now upper case.

In Turkish locales, signal names with an upper case 'I' are now accepted,
while signal names with a lower case 'i' are no longer accepted, and the
output of 'killall -l' now contains proper capital 'I' without dot instead
of a dotted capital 'I'.

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.

Revert most part of 200420 as requested, as more review and polish is
needed.

Remove unneeded header includes from usr.bin/ except contributed code.

Tested with: make universe

Add libjail, a (somewhat) simpler interface to the jail_set and jail_get
system calls and the security.jail.param sysctls.

Approved by: bz (mentor)

Add support for the arbitrary named jail parameters used by jail_set(2)
and jail_get(2). Jail(8) can now create jails using a "name=value"
format instead of just specifying a limited set of fixed parameters; it
can also modify parameters of existing jails. Jls(8) can display all
parameters of jails, or a specified set of parameters. The available
parameters are gathered from the kernel, and not hard-coded into these
programs.

Small patches on killall(1) and jexec(8) to support jail names with
jail_get(2).

Approved by: bz (mentor)

Use strlcpy() where appropriate.

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

Fix numerous bugs when parsing options and arguments.

The signal number has to be less than NSIG strictly.

PR: misc/69768
Submitted by: bronek
MFC after: 1 week

Don't pass negative values into <ctype.h> functions on machines
with signed chars.

Print size_t with %zu, not %d.

Respect locale settings from the environment.

New -e flag, modifies the behavior of the -u uid flag to use the
effective user id, instead of the real user id.

MFC after: 2 weeks

Serial murderers shouldn't commit suicide. (killall should
avoid killing itself.)

PR: bin/46107
Submitted by: stacey <stacey_@starwhack.net>

o Sync usage() and man page synopsis with reality.

MFC after: 1 week

Use the 3-component version of the KERN_PROC_PROC sysctl.

Use KERN_PROC_PROC instead of KERN_PROC_ALL when enumerating processes so
that we kill each process once, not once for every thread it owns. This
avoids "No such process" warnings when killing threaded processes.

make "killall -j" not core dump.

Submitted by: Joe Marcus Clarke in current@

o Add jls(8) for listing active jails.
o Add jexec(8) to execute a command in an existing jail.
o Add -j option for killall(1) to kill all processes in a specified
jail.
o Add -i option to jail(8) to output jail ID of newly created jail.

Header was included twice. Hardcode program name in usage string.

Consistently use FBSDID

Mark a warning as such. Without this, it isn't obvious whether
killall stopped after failing to kill one process or whether it kept
going.

Skip zombies. Add an option (-z) to revert to the historical behaviour
of trying to kill zombies (which has no effect except emit a few error
messages)

Use the method described in the strtol man page to check if it parsed
the entire string. This avoids signed/unsigned comparison.

Compensate for "Compensate for header dethreading" by backing it out.

Allow -u to work with UID's also.

Submitted by: Seth Kingsley <seth.kingsley@windriver.com>

Fix an array which was too small.

PR: 27380
Submitted by: Samuel Greear <sgreear@vsni.com>

Compensate for header dethreading.

Work around the p_comm[] size limit. If the user supplies more than
16 characters, only check the first 16 since that is all the kernel
records. This isn't ideal, but it is probably the best we can do.
Otherwise, "killall communicator-linux-4.76.bin" will not match
the process as the kernel only records "communicator-lin".

Make "killall -t p0" really works.
Old code works only if at least one process name additionly specified.

Use the real user ID so non-root users can kill setuid processes
they started.

PR: 23356
Submitted by: Maxim Konovalov <maxim@macomnet.ru>

Catch up to the new kinfo_proc.

-U cannot be an option since some signals start with U. -u is the
documented behavior so only check for that.

After positive feedback from a few folks, activate a switchover to
using killall.c instead of the perl version that depends on procfs.
The C version uses sysctl(). The program is based on a hack that was
originally written about 6 years ago and has evolved somewhat since then.
(which is why it is a superset of killall.pl, rather than being a clone.)

With apologies to: wosch

Try and fix up some bogus indentation leftovers from emacs several
years ago.

Sigh, today is not my day. Convert a verbose while() .. loop into a for()
loop.

Submitted by: billf

*blush*. I was *sure* I compiled this after the last change..
Add the missing )

Shamed by: billf

killall.c is meant to be a superset replacement of killall.pl, the
main difference is that it uses sysctl to get the process lists rather
than /proc - thereby reducing the dependency on /proc by one more tool.