Remove a useless assignment and two unused variables.
[dragonfly/netmp.git] / usr.bin / time / time.c
blobdf52686ef8c0928049b5f5b4bfbe8ee30f5b0a0a
1 /*
2 * Copyright (c) 1987, 1988, 1993
3 * The Regents of the University of California. All rights reserved.
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. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
33 * @(#) Copyright (c) 1987, 1988, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)time.c 8.1 (Berkeley) 6/6/93
35 * $FreeBSD: src/usr.bin/time/time.c,v 1.14.2.5 2002/06/28 08:35:15 tjr Exp $
36 * $DragonFly: src/usr.bin/time/time.c,v 1.11 2005/03/04 16:54:37 liamfoy Exp $
39 #include <sys/param.h>
40 #include <sys/time.h>
41 #include <sys/resource.h>
42 #include <sys/signal.h>
43 #include <sys/sysctl.h>
44 #include <sys/wait.h>
46 #include <err.h>
47 #include <errno.h>
48 #include <kinfo.h>
49 #include <locale.h>
50 #include <signal.h>
51 #include <stdio.h>
52 #include <stdlib.h>
53 #include <string.h>
54 #include <unistd.h>
56 static void humantime(FILE *, long, long);
57 static void usage(void);
59 static char decimal_point;
61 int
62 main(int argc, char **argv)
64 pid_t pid;
65 int aflag, ch, hflag, lflag, status, pflag;
66 int exit_on_sig;
67 struct timeval before, after;
68 struct rusage ru;
69 FILE *out = stderr;
70 const char *ofn = NULL;
72 setlocale(LC_NUMERIC, "");
73 decimal_point = localeconv()->decimal_point[0];
75 aflag = hflag = lflag = pflag = 0;
76 while ((ch = getopt(argc, argv, "ahlo:p")) != -1)
77 switch (ch) {
78 case 'a':
79 aflag = 1;
80 break;
81 case 'h':
82 hflag = 1;
83 break;
84 case 'l':
85 lflag = 1;
86 break;
87 case 'o':
88 ofn = optarg;
89 break;
90 case 'p':
91 pflag = 1;
92 break;
93 default:
94 usage();
97 if (!(argc -= optind))
98 exit(0);
99 argv += optind;
101 if (ofn) {
102 if ((out = fopen(ofn, aflag ? "a" : "w")) == NULL)
103 err(1, "%s", ofn);
104 setvbuf(out, (char *)NULL, _IONBF, (size_t)0);
107 if (gettimeofday(&before, (struct timezone *)NULL) == -1)
108 err(1, "gettimeofday failed");
109 switch (pid = fork()) {
110 case -1: /* error */
111 err(1, "could not fork");
112 /* NOTREACHED */
113 case 0: /* child */
114 execvp(*argv, argv);
115 err(errno == ENOENT ? 127 : 126, "%s", *argv);
116 /* NOTREACHED */
118 /* parent */
119 if (signal(SIGINT, SIG_IGN) == SIG_ERR)
120 err(1, "signal failed");
121 if (signal(SIGQUIT, SIG_IGN) == SIG_ERR)
122 err(1, "signal failed");
123 while (wait4(pid, &status, 0, &ru) != pid) /* XXX use waitpid */
125 if (gettimeofday(&after, (struct timezone *)NULL) == -1)
126 err(1, "gettimeofday failed");
127 if (!WIFEXITED(status))
128 warnx("command terminated abnormally");
129 exit_on_sig = WIFSIGNALED(status) ? WTERMSIG(status) : 0;
130 after.tv_sec -= before.tv_sec;
131 after.tv_usec -= before.tv_usec;
132 if (after.tv_usec < 0)
133 after.tv_sec--, after.tv_usec += 1000000;
134 if (pflag) {
135 /* POSIX wants output that must look like
136 "real %f\nuser %f\nsys %f\n" and requires
137 at least two digits after the radix. */
138 fprintf(out, "real %ld%c%02ld\n",
139 after.tv_sec, decimal_point,
140 after.tv_usec / 10000);
141 fprintf(out, "user %ld%c%02ld\n",
142 ru.ru_utime.tv_sec, decimal_point,
143 ru.ru_utime.tv_usec / 10000);
144 fprintf(out, "sys %ld%c%02ld\n",
145 ru.ru_stime.tv_sec, decimal_point,
146 ru.ru_stime.tv_usec / 10000);
147 } else if (hflag) {
148 humantime(out, after.tv_sec, after.tv_usec / 10000);
149 fprintf(out, " real\t");
150 humantime(out, ru.ru_utime.tv_sec, ru.ru_utime.tv_usec / 10000);
151 fprintf(out, " user\t");
152 humantime(out, ru.ru_stime.tv_sec, ru.ru_stime.tv_usec / 10000);
153 fprintf(out, " sys\n");
154 } else {
155 fprintf(out, "%9ld%c%02ld real ",
156 after.tv_sec, decimal_point,
157 after.tv_usec / 10000);
158 fprintf(out, "%9ld%c%02ld user ",
159 ru.ru_utime.tv_sec, decimal_point,
160 ru.ru_utime.tv_usec / 10000);
161 fprintf(out, "%9ld%c%02ld sys\n",
162 ru.ru_stime.tv_sec, decimal_point,
163 ru.ru_stime.tv_usec / 10000);
165 if (lflag) {
166 int hz;
167 u_long ticks;
169 if (kinfo_get_sched_stathz(&hz))
170 err(1, "kinfo_get_sched_stathz");
171 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) +
172 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000;
175 * If our round-off on the tick calculation still puts us at 0,
176 * then always assume at least one tick.
178 if (ticks == 0)
179 ticks = 1;
181 fprintf(out, "%10ld %s\n",
182 ru.ru_maxrss, "maximum resident set size");
183 fprintf(out, "%10ld %s\n",
184 ru.ru_ixrss / ticks, "average shared memory size");
185 fprintf(out, "%10ld %s\n",
186 ru.ru_idrss / ticks, "average unshared data size");
187 fprintf(out, "%10ld %s\n",
188 ru.ru_isrss / ticks, "average unshared stack size");
189 fprintf(out, "%10ld %s\n",
190 ru.ru_minflt, "page reclaims");
191 fprintf(out, "%10ld %s\n",
192 ru.ru_majflt, "page faults");
193 fprintf(out, "%10ld %s\n",
194 ru.ru_nswap, "swaps");
195 fprintf(out, "%10ld %s\n",
196 ru.ru_inblock, "block input operations");
197 fprintf(out, "%10ld %s\n",
198 ru.ru_oublock, "block output operations");
199 fprintf(out, "%10ld %s\n",
200 ru.ru_msgsnd, "messages sent");
201 fprintf(out, "%10ld %s\n",
202 ru.ru_msgrcv, "messages received");
203 fprintf(out, "%10ld %s\n",
204 ru.ru_nsignals, "signals received");
205 fprintf(out, "%10ld %s\n",
206 ru.ru_nvcsw, "voluntary context switches");
207 fprintf(out, "%10ld %s\n",
208 ru.ru_nivcsw, "involuntary context switches");
211 * If the child has exited on a signal, exit on the same
212 * signal, too, in order to reproduce the child's exit
213 * status. However, avoid actually dumping core from
214 * current process.
216 if (exit_on_sig) {
217 if (signal(exit_on_sig, SIG_DFL) == SIG_ERR)
218 warn("signal failed");
219 else
220 kill(getpid(), exit_on_sig);
222 exit(WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE);
225 static void
226 usage(void)
228 fprintf(stderr,
229 "usage: time [-al] [-h|-p] [-o file] utility [argument ...]\n");
230 exit(1);
233 static void
234 humantime(FILE *out, long sec, long usec)
236 long days, hrs, mins;
238 days = sec / (60L * 60 * 24);
239 sec %= (60L * 60 * 24);
240 hrs = sec / (60L * 60);
241 sec %= (60L * 60);
242 mins = sec / 60;
243 sec %= 60;
245 fprintf(out, "\t");
246 if (days)
247 fprintf(out, "%ldd", days);
248 if (hrs)
249 fprintf(out, "%ldh", hrs);
250 if (mins)
251 fprintf(out, "%ldm", mins);
252 fprintf(out, "%ld%c%02lds", sec, decimal_point, usec);