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58 lines
1.7 KiB
58 lines
1.7 KiB
/* time.c - time a simple command
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*
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* Copyright 2013 Rob Landley <rob@landley.net>
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*
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* See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/time.html
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USE_TIME(NEWTOY(time, "<1^pv", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_MAYFORK))
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config TIME
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bool "time"
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default y
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depends on TOYBOX_FLOAT
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help
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usage: time [-pv] COMMAND...
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Run command line and report real, user, and system time elapsed in seconds.
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(real = clock on the wall, user = cpu used by command's code,
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system = cpu used by OS on behalf of command.)
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-p POSIX format output (default)
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-v Verbose
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*/
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#define FOR_time
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#include "toys.h"
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void time_main(void)
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{
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pid_t pid;
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struct timeval tv, tv2;
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gettimeofday(&tv, NULL);
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if (!(pid = XVFORK())) xexec(toys.optargs);
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else {
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int stat;
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struct rusage ru;
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float r, u, s;
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wait4(pid, &stat, 0, &ru);
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gettimeofday(&tv2, NULL);
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if (tv.tv_usec > tv2.tv_usec) {
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tv2.tv_usec += 1000000;
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tv2.tv_sec--;
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}
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r = (tv2.tv_sec-tv.tv_sec)+((tv2.tv_usec-tv.tv_usec)/1000000.0);
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u = ru.ru_utime.tv_sec+(ru.ru_utime.tv_usec/1000000.0);
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s = ru.ru_stime.tv_sec+(ru.ru_stime.tv_usec/1000000.0);
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if (FLAG(v)) fprintf(stderr, "Real time (s): %f\nSystem time (s): %f\n"
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"User time (s): %f\nMax RSS (KiB): %ld\nMajor faults: %ld\n"
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"Minor faults: %ld\nFile system inputs: %ld\nFile system outputs: %ld\n"
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"Voluntary context switches: %ld\nInvoluntary context switches: %ld\n",
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r, s, u, ru.ru_maxrss, ru.ru_majflt, ru.ru_minflt, ru.ru_inblock,
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ru.ru_oublock, ru.ru_nvcsw, ru.ru_nivcsw);
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else fprintf(stderr, "real %f\nuser %f\nsys %f\n", r, u, s);
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toys.exitval = WIFEXITED(stat) ? WEXITSTATUS(stat) : WTERMSIG(stat);
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}
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}
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