Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

kill: Note that this is used both as a normal program and a shell builtin.

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'.

sh: Add kill builtin.

This allows specifying a %job (which is equivalent to the corresponding
process group).

Additionally, it improves reliability of kill from sh in high-load
situations and ensures "kill" finds the correct utility regardless of PATH,
as required by POSIX (unless the undocumented %builtin mechanism is used).

Side effect: fatal errors (any error other than kill(2) failure) now return
exit status 2 instead of 1. (This is consistent with other sh builtins, but
not in NetBSD.)

Code size increases about 1K on i386.

Obtained from: NetBSD

kill: Stop processing if a syntactically invalid pid is encountered.

So a command like
kill _HUP 1
now fails without sending SIGTERM to init.

The behaviour when kill(2) fails remains unchanged: processing continues.
This matches other implementations and POSIX and is useful for killing
multiple processes at once when some of them may already be gone.

PR: bin/40282

Do not restrict the allowed signals that can be specified by number
to the list of signals that has symbolic name. It was impossible to
send rt signals with kill(1) due to the check.

MFC after: 1 week

Fix markup.

Add the new standard EXIT STATUS section where appropriate.
Sort standard sections in the (documented) preferred order.

/*- or .\"- or #- to begin license clauses.

Deal with double whitespace.

Remove clause 3 from the UCB licenses.

OK'ed by: imp, core

static and const.

Use sys_nsig instead of the static NSIG. DragonflyBSD kill.c:1.3

Obtained from: DragonflyBSD

Quiet warnings about copyright[].

Consistently use __FBSDID

Markup nits: use the Ar macro when describing the -signal_name and
-signal_number options, and for referring to the "pid" argument.

Add examples and diagnostics sections

Support the "--" end of options marker, useful to disambiguate between
signal numbers and process groups (negative pid arguments), and
required by SUSv3.

Correct history (again): V3 had a kill command, only it was in section 8,
not 1.

Correct History section: kill(1) appeared in V4, not V6.

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.

Default to WARNS=2. Binary builds that cannot handle this must explicitly
set WARNS=0.

Reviewed by: mike

WARNS= -> WARNS?=

Submitted by: Mike Barcroft <mike@q9media.com>

Silence WARNS=2 and BDECFLAGS on the i386 and alpha

MFC After: 1 week

mdoc(7) police: use the new features of the Nm macro.

Correct some hard sentence breaks. Only those surrounding the previous
commit and those which cause ugly nroff output have been fixed, since
the purpose of the style guideline which they contravene is to reduce
the sizes of deltas.

Reported by: bde

Improve shell documentation:

* Consistently misspell built-in as builtin.

* Add a builtin(1) manpage and create builtin(1) MLINKS for all shell
builtin commands for which no standalone utility exists. These MLINKS
replace those that were created for csh(1).

* Add appropriate xrefs for builtin(1) to the csh(1) and sh(1) manpages,
as well as to the manpages of standalone utilities which are supported
as shell builtin commands in at least one of the shells. In such
manpages, explain that similar functionality may be provided as a
shell builtin command.

* Improve sh(1)'s description of the cd builtin command. Csh(1) already
describes it adequately. Replace the cd(1) manpage with a builtin(1)
MLINKS link.

* Clean up some mdoc problems: use Xr instead of literal "foo(n)"; use
Ic instead of Xr for shell builtin commands.

* Undo English contractions.

Reviewed by: mpp, rgrimes

$Id$ -> $FreeBSD$

kill.1: Remove reference to obsolete sigvec(2) man page. Removed
self reference in sigaction(2) man page.

Submitted by: Josh Gilliam <josh@quick.net>
PR: 6617

Correct use of .Nm. Add rcsid.

Disallow empty arguments (eg: '') as process ids.
PR: 2631
Submitted by: Arne Henrik Juul <arnej@imf.unit.no>

Cosmetic change in usage string.

Signal # NSIG (32) is invalid.
Obtained from: {Net|Open}BSD

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 Lite2 mods, and -Wall cleaning.

add a reference to killall(1)

Allow 0 as a signal number to match the man page.
Noticed by: Mike Murphy <mrm@Sceard.COM>

Added $Id$

This commit was generated by cvs2svn to compensate for changes in r1556,
which included commits to RCS files with non-trunk default branches.