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

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

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

Sync program's usage() with manpage's SYNOPSIS.

ANSIify function definitions.
Add some constness to avoid some warnings.
Remove use register keyword.
Deal with missing/unneeded extern/prototypes.
Some minor type changes/casts to avoid warnings.

Reviewed by: md5

If we can't change the scheduling priority, warn but still execute
the requested utility. This is how nice(1) traditionall behaved,
and the behaviour required by SUSv3 and POSIX.2 UPE.

Submitted by: Peter Avalos <pavalos@theshell.com> (partially)
Reviewed by: mike

Support the SUSv3 -n option and the "--" end of options marker.
Replace "command" with "utility" in the manual page & source to be more
consistent with the terminology used in the standard, and to hint that
shell builtin commands won't work.

Submitted by: Peter Avalos <pavalos@theshell.com> (partially)
Approved by: mike

According to POSIX, exit status must be 127 if the requested utility was not
found, 126 if the execvp() failed for any other reason.

Similar to rev. 1.6 to src/usr.bin/env/env.c

Reviewed by: mike

remove __P

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.

Warns cleanup. Add FreeBSD ID to Makefile and nice.c.

Clean up some ambiguous nested if/elses.

remove duplicated usage string from commit rev 1.2
fix usage()

Check the # of arguments, instead of silently dumping core.

This commit was generated by cvs2svn to compensate for changes in r1590,
which included commits to RCS files with non-trunk default branches.

BSD 4.4 Lite Usr.bin Sources