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/* Copyright (C) 2008 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by David Bartley <dtbartle@csclub.uwaterloo.ca>, 2008.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sys/types.h>
#include <sys/resource.h>
#include <sys/wait.h>
#include <sys/times.h>
#include <time.h>
/* Solaris only supports user/system time fields of rusage for wait. */
pid_t
__wait4 (__pid_t pid, __WAIT_STATUS stat_loc, int options,
struct rusage *usage)
{
/* start time */
struct tms start;
if (usage && times (&start) == (clock_t)-1)
return -1;
/* wait */
pid = __waitpid (pid, stat_loc.__iptr, options);
if (pid == -1)
return -1;
/* end time */
struct tms end;
if (usage && times (&end) == (clock_t)-1)
return -1;
/* compute deltas */
if (usage)
{
clock_t dutime = end.tms_cutime - start.tms_cutime;
clock_t dstime = end.tms_cstime - start.tms_cstime;
usage->ru_utime.tv_sec = dutime / CLOCKS_PER_SEC;
usage->ru_utime.tv_usec = (dutime % CLOCKS_PER_SEC) * (1000000 / CLOCKS_PER_SEC);
usage->ru_stime.tv_sec = dstime / CLOCKS_PER_SEC;
usage->ru_stime.tv_usec = (dstime % CLOCKS_PER_SEC) * (1000000 / CLOCKS_PER_SEC);
}
return pid;
}
weak_alias (__wait4, wait4)
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