1 /*
2 * Copyright (c) 1987, 1988, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#) Copyright (c) 1987, 1988, 1993 The Regents of the University of California. All rights reserved.
30 * @(#)time.c 8.1 (Berkeley) 6/6/93
31 * $FreeBSD: src/usr.bin/time/time.c,v 1.14.2.5 2002/06/28 08:35:15 tjr Exp $
32 */
33
34 #include <sys/time.h>
35 #include <sys/resource.h>
36 #include <sys/signal.h>
37 #include <sys/wait.h>
38
39 #include <err.h>
40 #include <errno.h>
41 #ifndef BOOTSTRAPPING
42 #include <kinfo.h>
43 #endif
44 #include <locale.h>
45 #include <signal.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <stdint.h>
49 #include <string.h>
50 #include <time.h>
51 #include <unistd.h>
52
53 static void humantime(FILE *, long, long);
54 static void showtime(FILE *, struct timespec *, struct timespec *,
55 struct rusage *);
56 static void siginfo(int);
57
58 static void usage(void);
59
60 static sig_atomic_t siginfo_recvd;
61 static char decimal_point;
62 struct timespec before_ts;
63 static int hflag, pflag;
64
65 int
main(int argc,char ** argv)66 main(int argc, char **argv)
67 {
68 pid_t pid;
69 int aflag, ch, lflag, status;
70 int exit_on_sig;
71 struct timespec after;
72 struct rusage ru;
73 FILE *out = stderr;
74 const char *ofn = NULL;
75
76 setlocale(LC_NUMERIC, "");
77 decimal_point = localeconv()->decimal_point[0];
78
79 aflag = hflag = lflag = pflag = 0;
80 while ((ch = getopt(argc, argv, "ahlo:p")) != -1)
81 switch (ch) {
82 case 'a':
83 aflag = 1;
84 break;
85 case 'h':
86 hflag = 1;
87 break;
88 case 'l':
89 #ifndef BOOTSTRAPPING
90 lflag = 1;
91 #endif
92 break;
93 case 'o':
94 ofn = optarg;
95 break;
96 case 'p':
97 pflag = 1;
98 break;
99 default:
100 usage();
101 }
102
103 if (!(argc -= optind))
104 exit(0);
105 argv += optind;
106
107 if (ofn) {
108 if ((out = fopen(ofn, aflag ? "ae" : "we")) == NULL)
109 err(1, "%s", ofn);
110 setvbuf(out, NULL, _IONBF, (size_t)0);
111 }
112
113 if (clock_gettime(CLOCK_MONOTONIC, &before_ts) == -1)
114 err(1, "clock_gettime failed");
115 switch (pid = fork()) {
116 case -1: /* error */
117 err(1, "could not fork");
118 /* NOTREACHED */
119 case 0: /* child */
120 execvp(*argv, argv);
121 err(errno == ENOENT ? 127 : 126, "%s", *argv);
122 /* NOTREACHED */
123 }
124 /* parent */
125 if (signal(SIGINT, SIG_IGN) == SIG_ERR)
126 err(1, "signal failed");
127 if (signal(SIGQUIT, SIG_IGN) == SIG_ERR)
128 err(1, "signal failed");
129 siginfo_recvd = 0;
130 #ifdef SIGINFO
131 if (signal(SIGINFO, siginfo) == SIG_ERR)
132 err(1, "signal failed");
133 siginterrupt(SIGINFO,1 );
134 #endif
135 while (wait4(pid, &status, 0, &ru) != pid){
136 if (siginfo_recvd) {
137 siginfo_recvd = 0;
138 if (clock_gettime(CLOCK_MONOTONIC, &after) == -1)
139 err(1, "clock_gettime failed");
140 getrusage(RUSAGE_CHILDREN, &ru);
141 showtime(stdout, &before_ts, &after, &ru);
142 }
143 }
144 if (clock_gettime(CLOCK_MONOTONIC, &after) == -1)
145 err(1, "clock_gettime failed");
146 if (!WIFEXITED(status))
147 warnx("command terminated abnormally");
148 exit_on_sig = WIFSIGNALED(status) ? WTERMSIG(status) : 0;
149 showtime(out, &before_ts, &after, &ru);
150 #ifndef BOOTSTRAPPING
151 if (lflag) {
152 int hz;
153 u_long ticks;
154
155 if (kinfo_get_sched_stathz(&hz))
156 err(1, "kinfo_get_sched_stathz");
157 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) +
158 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000;
159
160 /*
161 * If our round-off on the tick calculation still puts us at 0,
162 * then always assume at least one tick.
163 */
164 if (ticks == 0)
165 ticks = 1;
166
167 fprintf(out, "%10ld %s\n",
168 ru.ru_maxrss, "maximum resident set size");
169 fprintf(out, "%10ld %s\n",
170 ru.ru_ixrss / ticks, "average shared memory size");
171 fprintf(out, "%10ld %s\n",
172 ru.ru_idrss / ticks, "average unshared data size");
173 fprintf(out, "%10ld %s\n",
174 ru.ru_isrss / ticks, "average unshared stack size");
175 fprintf(out, "%10ld %s\n",
176 ru.ru_minflt, "page reclaims");
177 fprintf(out, "%10ld %s\n",
178 ru.ru_majflt, "page faults");
179 fprintf(out, "%10ld %s\n",
180 ru.ru_nswap, "swaps");
181 fprintf(out, "%10ld %s\n",
182 ru.ru_inblock, "block input operations");
183 fprintf(out, "%10ld %s\n",
184 ru.ru_oublock, "block output operations");
185 fprintf(out, "%10ld %s\n",
186 ru.ru_msgsnd, "messages sent");
187 fprintf(out, "%10ld %s\n",
188 ru.ru_msgrcv, "messages received");
189 fprintf(out, "%10ld %s\n",
190 ru.ru_nsignals, "signals received");
191 fprintf(out, "%10ld %s\n",
192 ru.ru_nvcsw, "voluntary context switches");
193 fprintf(out, "%10ld %s\n",
194 ru.ru_nivcsw, "involuntary context switches");
195 }
196 #endif
197 /*
198 * If the child has exited on a signal, exit on the same
199 * signal, too, in order to reproduce the child's exit
200 * status. However, avoid actually dumping core from
201 * current process.
202 */
203 if (exit_on_sig) {
204 if (signal(exit_on_sig, SIG_DFL) == SIG_ERR)
205 warn("signal failed");
206 else
207 kill(getpid(), exit_on_sig);
208 }
209 exit(WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE);
210 }
211
212 static void
usage(void)213 usage(void)
214 {
215 fprintf(stderr,
216 "usage: time [-al] [-h|-p] [-o file] utility [argument ...]\n");
217 exit(1);
218 }
219
220 static void
humantime(FILE * out,long sec,long usec)221 humantime(FILE *out, long sec, long usec)
222 {
223 long days, hrs, mins;
224
225 days = sec / (60L * 60 * 24);
226 sec %= (60L * 60 * 24);
227 hrs = sec / (60L * 60);
228 sec %= (60L * 60);
229 mins = sec / 60;
230 sec %= 60;
231
232 fprintf(out, "\t");
233 if (days)
234 fprintf(out, "%ldd", days);
235 if (hrs)
236 fprintf(out, "%ldh", hrs);
237 if (mins)
238 fprintf(out, "%ldm", mins);
239 fprintf(out, "%ld%c%02lds", sec, decimal_point, usec);
240 }
241
242 static void
showtime(FILE * out,struct timespec * before,struct timespec * after,struct rusage * ru)243 showtime(FILE *out, struct timespec *before, struct timespec *after,
244 struct rusage *ru)
245 {
246
247 after->tv_sec -= before->tv_sec;
248 after->tv_nsec -= before->tv_nsec;
249 if (after->tv_nsec < 0)
250 after->tv_sec--, after->tv_nsec += 1000000000L;
251
252 if (pflag) {
253 /* POSIX wants output that must look like
254 "real %f\nuser %f\nsys %f\n" and requires
255 at least two digits after the radix. */
256 fprintf(out, "real %jd%c%02ld\n",
257 (intmax_t)after->tv_sec, decimal_point,
258 after->tv_nsec/10000000L);
259 fprintf(out, "user %jd%c%02ld\n",
260 (intmax_t)ru->ru_utime.tv_sec, decimal_point,
261 ru->ru_utime.tv_usec/10000);
262 fprintf(out, "sys %jd%c%02ld\n",
263 (intmax_t)ru->ru_stime.tv_sec, decimal_point,
264 ru->ru_stime.tv_usec/10000);
265 } else if (hflag) {
266 humantime(out, after->tv_sec, after->tv_nsec/10000000);
267 fprintf(out, " real\t");
268 humantime(out, ru->ru_utime.tv_sec, ru->ru_utime.tv_usec/10000);
269 fprintf(out, " user\t");
270 humantime(out, ru->ru_stime.tv_sec, ru->ru_stime.tv_usec/10000);
271 fprintf(out, " sys\n");
272 } else {
273 fprintf(out, "%9jd%c%02ld real ",
274 (intmax_t)after->tv_sec, decimal_point,
275 after->tv_nsec/10000000);
276 fprintf(out, "%9jd%c%02ld user ",
277 (intmax_t)ru->ru_utime.tv_sec, decimal_point,
278 ru->ru_utime.tv_usec/10000);
279 fprintf(out, "%9jd%c%02ld sys\n",
280 (intmax_t)ru->ru_stime.tv_sec, decimal_point,
281 ru->ru_stime.tv_usec/10000);
282 }
283 }
284
285 static void
siginfo(int sig __unused)286 siginfo(int sig __unused)
287 {
288 siginfo_recvd = 1;
289 }
290