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
40 static 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);
60 static void prl(long, const char *);
61 static void prts(const char *, const char *, const struct timespec *,
62 const char *);
63 static void prtv(const char *, const char *, const struct timeval *,
64 const char *);
65
66 int
main(int argc,char ** volatile argv)67 main(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
190 static void
usage(void)191 usage(void)
192 {
193
194 (void)fprintf(stderr,
195 "Usage: %s [-clpt] [-f <fmt>] utility [argument ...]\n",
196 getprogname());
197 exit(EXIT_FAILURE);
198 }
199
200 static void
prl(long val,const char * expn)201 prl(long val, const char *expn)
202 {
203
204 (void)fprintf(stderr, "%10ld %s\n", val, expn);
205 }
206
207 static void
prts(const char * pre,const char * decpt,const struct timespec * ts,const char * post)208 prts(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
216 static void
prtv(const char * pre,const char * decpt,const struct timeval * tv,const char * post)217 prtv(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