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)

echo(1): Clarify portability and mention literal "--" handling.

MFC after: 1 week

Mark functions as __dead2 in order to help the LLVM static checker
understand which code paths aren't possible.

This commit eliminates 117 false positive bug reports of the form
"allocate memory; error out if pointer is NULL; use pointer".

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

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

Mechanically kill hard sentence breaks.

Remove clause 3 from the UCB licenses.

OK'ed by: imp, core

- Check and report write(2) errors.

- Issue a single writev(2) call instead of multiple write(2)s.
This change improves the inefficiencies introduced when echo
went on an stdio diet.

The following figures are for echoing 1000 arguments.
original stdio-based echo:
0.01 real 0.01 user 0.00 sys
before:
0.05 real 0.00 user 0.04 sys
after:
0.01 real 0.00 user 0.00 sys

Note that -n and \c are implementation-defined as per TC1 to POSIX 2001.

Approved by: re@ (bmah)
MFC after: 3 days

Quiet warnings about copyright[].

Refer to 1003.1-2001 in the Standards section now that TC1 allows the
traditional BSD behaviour (-n option) and FreeBSD extensions (\c).

Put echo on a diet, removing unnecessary use of stdio and getopt.

Before...
-r-xr-xr-x 1 root wheel 58636 Oct 28 05:16 /bin/echo
After...
-rwxr-xr-x 1 root wheel 12824 Nov 12 17:39 /usr/obj/usr/src/bin/echo/echo

Submitted by: Tim Kientzle <kientzle@acm.org>

Consistently use __FBSDID

clarify code:

add comments.
don't get the length of each arg passed, only the last one.
check against == or != NULL rather than using a pointer value as
truth test.

Fix warnings inspired by lint, a commercial lint and WARNS=4.

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 gc some #ifdef sun ... #endif code

Approved by: arch@, new style(9)

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

Reviewed by: mike

mdoc(7) police: utilize the new .Ex macro.

WARNS= -> WARNS?=

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

Make this pass WARNS=2 and BDECFLAGS

mdoc(7) police: split punctuation characters + misc fixes.

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

$Id$ -> $FreeBSD$

Various spelling/formatting changes.

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

Correct use of .Nm. Add rcsid.

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.

-Wall cleaning.

Well, it would appear that the "ayes" have it (though by a slim margin).
Apply my \c changes to echo. It should also be noted that this is:
A) going into 2.2, not 2.1
B) a functional no-op unless you actually use it!

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.