54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
/*
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* Copyright (c) 2013 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* sys/resource/getrusage.c
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* Get resource usage statistics.
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*/
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#include <sys/resource.h>
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#include <sys/syscall.h>
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#include <errno.h>
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#include <time.h>
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#include <timespec.h>
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static struct timeval timeval_of_timespec(struct timespec ts)
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{
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struct timeval tv;
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tv.tv_sec = ts.tv_sec;
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tv.tv_usec = ts.tv_nsec / 1000;
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return tv;
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}
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int getrusage(int who, struct rusage* usage)
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{
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struct tmns tmns;
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if ( timens(&tmns) != 0 )
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return -1;
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if ( who == RUSAGE_SELF )
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{
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usage->ru_utime = timeval_of_timespec(tmns.tmns_utime);
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usage->ru_stime = timeval_of_timespec(tmns.tmns_stime);
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}
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else if ( who == RUSAGE_CHILDREN )
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{
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usage->ru_utime = timeval_of_timespec(tmns.tmns_cutime);
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usage->ru_stime = timeval_of_timespec(tmns.tmns_cstime);
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}
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else
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return errno = EINVAL, -1;
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return 0;
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}
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