64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/times.h>
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#include <sys/wait.h>
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#include "util.h"
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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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/* used to specify POSIX output format, but that's the only format we
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* have for now */
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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:");
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if ((rbeg = times(&tms)) < 0) /* POSIX doesn't say NULL is ok... */
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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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/* FIXME: check errno for POSIX exit status
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* 126: found could not be invoked
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* 127: could not be found
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* problem is some like EACCESS can mean either...
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* worth doing manual path search for correct value? also gives more
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* accurate time as the patch search wouldn't be included in child's
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* user/sys times... */
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enprintf(127, "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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