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

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

time: Use close-on-exec instead of fclose() in the child process.

Rework all non-contributed files that use `struct timezone'.

This structure is not part of POSIX. According to POSIX, gettimeofday()
has the following prototype:

int gettimeofday(struct timeval *restrict tp, void *restrict tzp);

Also, POSIX states that gettimeofday() shall return 0 (as long as tzp is
not used). Remove dead error handling code. Also use NULL for a
nul-pointer instead of integer 0.

While there, change all pieces of code that only use tv_sec to use
time(3), as this provides less overhead.

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

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

Cast to intmax_t to print tv_sec in struct timeval.
Avoid shadowing a global variable with a function argument.
Set WARNS to 6.

Handle SIGINFO in time(1) by printing the time the given command is running.
I find it quite handy to just hit ^T and see the time.

o Close an output file -o flag opened before execvp(3) in a child.

PR: bin/89666
Submitted by: Arne H Juul
MFC after: 1 month

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

Uses wait4() instead of wait3() when waiting for a child process to exit.

Reviewed by: yar

Assorted minor fixes, mostly style(9):
- PID should be pid_t, not int;
- sort #include's and local variables;
- don't overuse initializers;
- use warn(3) instead of perror(3) consistently;
- amplify the comment on signals.

Don't dump core from the time(1) process itself
if the child process has exited on a signal
whose default action is to dump core.

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

Make it obvious that command line arguments may be specified for the utility
that is to be invoked on the command line. Use "utility" instead of "command"
in manual page and usage message for consistency with POSIX.

Determine exit status to use before writing diagnostic message; warn()
may change errno.

remove __P

Fix one warning - still not warns clean.

Localize it (LC_NUMERIC)

Remove vestages of a previous implimentation of "-h".

Submitted by: Tony Finch <dot@dotat.at>

Add a new "-h" Human-friendly h/m/s output format.

Reviewed by: bde

getopt and friends are declared in <unistd.h>
getopt returns -1 not EOF.

$Id$ -> $FreeBSD$

Adds the '-p' option to make time(1) output POSIX.2 compliant.
Updates the manpage as well.

I've rewritten the patch as it was for 2.2.7. It can probably be put
into 3.1-STABLE as well.

PR: bin/10515
Submitted by: Jens Schweikhardt <schweikh@noc.dfn.de>

Calls one or more of malloc(), warn(), err(), syslog(), execlp() or
execvp() in the child branch of a vfork(). Changed to use fork()
instead.

Some of these (mv, find, apply, xargs) might benefit greatly from
being rewritten to use vfork() properly.

PR: Loosely related to bin/8252
Approved by: jkh and bde

When exiting on SIGINT, exit with signal status

Brucifixion.

Behave like GNU time. More cleanup. Reword man page.

Pointed out by: Bruce Evans

Clean up the previous commit.

By default, /usr/bin/time writes its output to stderr. Two options
have been added to time(1) to write output to an alternative destination.
Option "-f filename" will write to filename, and filename can be - to
write to stdout. Option "-a filename" will append the output to filename.
Time(1) man page has been updated to reflect the change.

PR: 7368
Submitted by: Steven G. Kargl <kargl@troutmask.apl.washington.edu>

Add usage() and use err(3).

compare return value from getopt against -1 rather than EOF, per the final
posix standard on the topic.

Close PR#1781 - time returns with EXIT_SUCCESS on some failures
Submitted-By: Tor Egge <Tor.Egge@idt.ntnu.no>

Fix a bug under time's "-l" option. The values reported for average
shared memory size, average unshared data size, and average unshared
stack size were too high by a factor of 128/100, because the program
used a hard-coded hz value of 100. The correct value is the frequency
of the statistics clock, currently 128. The program now uses sysctl
to get the stathz value from the kernel.

Discussed with: bde@freebsd.org (Bruce Evans)

Close out PR#723: time -l dumps core

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

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