Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

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

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

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".

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

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

Quiet warnings about copyright[].

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)

Make this pass WARNS=2 and BDECFLAGS

$Id$ -> $FreeBSD$

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.

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