58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <sys/times.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "util.h"
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static void
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usage(void)
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{
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eprintf("usage: %s [-p] utility [argument ...]\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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pid_t pid;
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struct tms tms; /* hold user and sys times */
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clock_t rbeg, rend; /* real time */
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long ticks; /* per second */
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int status;
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ARGBEGIN {
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case 'p':
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break;
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default:
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usage();
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} ARGEND;
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if (!*argv)
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usage();
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if ((ticks = sysconf(_SC_CLK_TCK)) <= 0)
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eprintf("sysconf() failed to retrieve clock ticks per second\n");
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if ((rbeg = times(&tms)) < 0)
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eprintf("times() failed to retrieve start times:");
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if (!(pid = fork())) { /* child */
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execvp(*argv, argv);
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enprintf(errno == ENOENT ? 127 : 126, "failed to exec %s:", *argv);
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}
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waitpid(pid, &status, 0);
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if ((rend = times(&tms)) < 0)
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eprintf("times() failed to retrieve end times:");
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fprintf(stderr, "real %f\nuser %f\nsys %f\n",
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(rend - rbeg) / (double)ticks,
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tms.tms_cutime / (double)ticks,
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tms.tms_cstime / (double)ticks);
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return WIFEXITED(status) ? WEXITSTATUS(status) : 0;
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}
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