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	time.c - sbase - suckless unix tools
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	---
	time.c (1369B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <sys/times.h>
	3 #include <sys/wait.h>
	4
	5 #include <errno.h>
	6 #include <stdio.h>
	7 #include <unistd.h>
	8
	9 #include "util.h"
	10
	11 static void
	12 usage(void)
	13 {
	14 eprintf("usage: %s [-p] cmd [arg ...]\n", argv0);
	15 }
	16
	17 int
	18 main(int argc, char *argv[])
	19 {
	20 pid_t pid;
	21 struct tms tms; /* user and sys times */
	22 clock_t r0, r1; /* real time */
	23 long ticks; /* per second */
	24 int status, savederrno, ret = 0;
	25
	26 ARGBEGIN {
	27 case 'p':
	28 break;
	29 default:
	30 usage();
	31 } ARGEND
	32
	33 if (!argc)
	34 usage();
	35
	36 if ((ticks = sysconf(_SC_CLK_TCK)) <= 0)
	37 eprintf("sysconf _SC_CLK_TCK:");
	38
	39 if ((r0 = times(&tms)) == (clock_t)-1)
	40 eprintf("times:");
	41
	42 switch ((pid = fork())) {
	43 case -1:
	44 eprintf("fork:");
	45 case 0:
	46 execvp(argv[0], argv);
	47 savederrno = errno;
	48 weprintf("execvp %s:", argv[0]);
	49 _exit(126 + (savederrno == ENOENT));
	50 default:
	51 break;
	52 }
	53 waitpid(pid, &status, 0);
	54
	55 if ((r1 = times(&tms)) == (clock_t)-1)
	56 eprintf("times:");
	57
	58 if (WIFSIGNALED(status)) {
	59 fprintf(stderr, "Command terminated by signal %d\n",
	60 WTERMSIG(status));
	61 ret = 128 + WTERMSIG(status);
	62 }
	63
	64 fprintf(stderr, "real %f\nuser %f\nsys %f\n",
	65 (r1 - r0) / (double)ticks,
	66 tms.tms_cutime / (double)ticks,
	67 tms.tms_cstime / (double)ticks);
	68
	69 if (WIFEXITED(status))
	70 ret = WEXITSTATUS(status);
	71
	72 return ret;
	73 }