1/*	$NetBSD: time.c,v 1.24 2020/04/23 07:54:53 simonb Exp $	*/
2
3/*
4 * Copyright (c) 1987, 1988, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34__COPYRIGHT("@(#) Copyright (c) 1987, 1988, 1993\
35 The Regents of the University of California.  All rights reserved.");
36#endif /* not lint */
37
38#ifndef lint
39#if 0
40static char sccsid[] = "@(#)time.c	8.1 (Berkeley) 6/6/93";
41#endif
42__RCSID("$NetBSD: time.c,v 1.24 2020/04/23 07:54:53 simonb Exp $");
43#endif /* not lint */
44
45#include <sys/types.h>
46#include <sys/time.h>
47#include <sys/resource.h>
48#include <sys/wait.h>
49#include <errno.h>
50#include <err.h>
51#include <locale.h>
52#include <signal.h>
53#include <stdio.h>
54#include <stdlib.h>
55#include <unistd.h>
56
57#include "ext.h"
58
59__dead static void	usage(void);
60static void	prl(long, const char *);
61static void	prts(const char *, const char *, const struct timespec *,
62    const char *);
63static void	prtv(const char *, const char *, const struct timeval *,
64    const char *);
65
66int
67main(int argc, char ** volatile argv)
68{
69	int pid;
70	int ch, status, prec;
71	int volatile portableflag;
72	int volatile lflag;
73	const char *decpt;
74	const char *fmt;
75	const struct lconv *lconv;
76	struct timespec before, after;
77	struct rusage ru;
78
79	(void)setlocale(LC_ALL, "");
80
81	lflag = portableflag = 0;
82	prec = 1;
83	fmt = NULL;
84	while ((ch = getopt(argc, argv, "cf:lpt")) != -1) {
85		switch (ch) {
86		case 'f':
87			fmt = optarg;
88			portableflag = 0;
89			lflag = 0;
90			break;
91		case 'c':	/* csh format */
92			fmt = "%Uu %Ss %E %P %X+%Dk %I+%Oio %Fpf+%Ww";
93			portableflag = 0;
94			lflag = 0;
95			break;
96		case 'p':	/* POSIX.2 format */
97			portableflag = 1;
98			fmt = NULL;
99			lflag = 0;
100			break;
101		case 'l':
102			lflag = 1;
103			portableflag = 0;
104			fmt = NULL;
105			break;
106		case 't':	/* tcsh format */
107			fmt = "%Uu %Ss %E %P\t%X+%Dk %I+%Oio %Fpf+%Ww";
108			prec = 3;
109			portableflag = 0;
110			lflag = 0;
111			break;
112		case '?':
113		default:
114			usage();
115		}
116	}
117	argc -= optind;
118	argv += optind;
119
120	if (argc < 1)
121		usage();
122
123	(void)clock_gettime(CLOCK_MONOTONIC, &before);
124	switch(pid = vfork()) {
125	case -1:			/* error */
126		err(EXIT_FAILURE, "Vfork failed");
127		/* NOTREACHED */
128	case 0:				/* child */
129		/* LINTED will return only on failure */
130		execvp(*argv, argv);
131		err((errno == ENOENT) ? 127 : 126, "Can't exec `%s'", *argv);
132		/* NOTREACHED */
133	}
134
135	/* parent */
136	(void)signal(SIGINT, SIG_IGN);
137	(void)signal(SIGQUIT, SIG_IGN);
138	if ((pid = wait4(pid, &status, 0, &ru)) == -1)
139		err(EXIT_FAILURE, "wait4 %d failed", pid);
140	(void)clock_gettime(CLOCK_MONOTONIC, &after);
141	if (!WIFEXITED(status))
142		warnx("Command terminated abnormally.");
143	timespecsub(&after, &before, &after);
144
145	if ((lconv = localeconv()) == NULL ||
146	    (decpt = lconv->decimal_point) == NULL)
147		decpt = ".";
148
149	if (fmt) {
150		static struct rusage null_ru;
151		before.tv_sec = 0;
152		before.tv_nsec = 0;
153		prusage1(stderr, fmt, prec, &null_ru, &ru, &after, &before);
154	} else if (portableflag) {
155		prts("real ", decpt, &after, "\n");
156		prtv("user ", decpt, &ru.ru_utime, "\n");
157		prtv("sys  ", decpt, &ru.ru_stime, "\n");
158	} else {
159		prts("", decpt, &after, " real ");
160		prtv("", decpt, &ru.ru_utime, " user ");
161		prtv("", decpt, &ru.ru_stime, " sys\n");
162	}
163
164	if (lflag) {
165		int hz = (int)sysconf(_SC_CLK_TCK);
166		unsigned long long ticks;
167#define SCALE(x) (long)(ticks ? x / ticks : 0)
168
169		ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) +
170		    hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000;
171		prl(ru.ru_maxrss, "maximum resident set size");
172		prl(SCALE(ru.ru_ixrss), "average shared memory size");
173		prl(SCALE(ru.ru_idrss), "average unshared data size");
174		prl(SCALE(ru.ru_isrss), "average unshared stack size");
175		prl(ru.ru_minflt, "page reclaims");
176		prl(ru.ru_majflt, "page faults");
177		prl(ru.ru_nswap, "swaps");
178		prl(ru.ru_inblock, "block input operations");
179		prl(ru.ru_oublock, "block output operations");
180		prl(ru.ru_msgsnd, "messages sent");
181		prl(ru.ru_msgrcv, "messages received");
182		prl(ru.ru_nsignals, "signals received");
183		prl(ru.ru_nvcsw, "voluntary context switches");
184		prl(ru.ru_nivcsw, "involuntary context switches");
185	}
186
187	return (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE);
188}
189
190static void
191usage(void)
192{
193
194	(void)fprintf(stderr,
195	    "Usage: %s [-clpt] [-f <fmt>] utility [argument ...]\n",
196	    getprogname());
197	exit(EXIT_FAILURE);
198}
199
200static void
201prl(long val, const char *expn)
202{
203
204	(void)fprintf(stderr, "%10ld  %s\n", val, expn);
205}
206
207static void
208prts(const char *pre, const char *decpt, const struct timespec *ts,
209    const char *post)
210{
211
212	(void)fprintf(stderr, "%s%9lld%s%02ld%s", pre, (long long)ts->tv_sec,
213	    decpt, (long)ts->tv_nsec / 10000000, post);
214}
215
216static void
217prtv(const char *pre, const char *decpt, const struct timeval *tv,
218    const char *post)
219{
220
221	(void)fprintf(stderr, "%s%9lld%s%02ld%s", pre, (long long)tv->tv_sec,
222	    decpt, (long)tv->tv_usec / 10000, post);
223}
224