Add the DragonFly cvs id and perform general cleanups on cvs/rcs/sccs ids. Most
[dragonfly.git] / usr.bin / time / time.c
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. 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.
20  *
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.
32  *
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 1.2 2003/06/17 04:29:32 dillon Exp $
37  */
38
39 #include <sys/types.h>
40 #include <sys/time.h>
41 #include <sys/resource.h>
42 #include <sys/signal.h>
43 #include <sys/sysctl.h>
44 #include <stdlib.h>
45 #include <sys/wait.h>
46
47 #include <err.h>
48 #include <stdio.h>
49 #include <errno.h>
50 #include <locale.h>
51 #include <string.h>
52 #include <unistd.h>
53 #include <signal.h>
54
55 static int getstathz(void);
56 static void humantime(FILE *, long, long);
57 static void usage(void);
58
59 static char decimal_point;
60
61 int
62 main(argc, argv)
63         int argc;
64         char **argv;
65 {
66         register int pid;
67         int aflag, ch, hflag, lflag, status, pflag;
68         struct timeval before, after;
69         struct rusage ru;
70         FILE *out = stderr;
71         char *ofn = NULL;
72         int exitonsig = 0; /* Die with same signal as child */
73
74         (void) setlocale(LC_NUMERIC, "");
75         decimal_point = localeconv()->decimal_point[0];
76
77         aflag = hflag = lflag = pflag = 0;
78         while ((ch = getopt(argc, argv, "ahlo:p")) != -1)
79                 switch((char)ch) {
80                 case 'a':
81                         aflag = 1;
82                         break;
83                 case 'h':
84                         hflag = 1;
85                         break;
86                 case 'l':
87                         lflag = 1;
88                         break;
89                 case 'o':
90                         ofn = optarg;
91                         break;
92                 case 'p':
93                         pflag = 1;
94                         break;
95                 case '?':
96                 default:
97                         usage();
98                 }
99
100         if (!(argc -= optind))
101                 exit(0);
102         argv += optind;
103
104         if (ofn) {
105                 if ((out = fopen(ofn, aflag ? "a" : "w")) == NULL)
106                         err(1, "%s", ofn);
107                 setvbuf(out, (char *)NULL, _IONBF, (size_t)0);
108         }
109
110         gettimeofday(&before, (struct timezone *)NULL);
111         switch(pid = fork()) {
112         case -1:                        /* error */
113                 err(1, "time");
114                 /* NOTREACHED */
115         case 0:                         /* child */
116                 execvp(*argv, argv);
117                 err(errno == ENOENT ? 127 : 126, "%s", *argv);
118                 /* NOTREACHED */
119         }
120         /* parent */
121         (void)signal(SIGINT, SIG_IGN);
122         (void)signal(SIGQUIT, SIG_IGN);
123         while (wait3(&status, 0, &ru) != pid);          /* XXX use waitpid */
124         gettimeofday(&after, (struct timezone *)NULL);
125         if ( ! WIFEXITED(status))
126                 warnx("command terminated abnormally");
127         if (WIFSIGNALED(status))
128                 exitonsig = WTERMSIG(status);
129         after.tv_sec -= before.tv_sec;
130         after.tv_usec -= before.tv_usec;
131         if (after.tv_usec < 0)
132                 after.tv_sec--, after.tv_usec += 1000000;
133         if (pflag) {
134                 /* POSIX wants output that must look like
135                 "real %f\nuser %f\nsys %f\n" and requires
136                 at least two digits after the radix. */
137                 fprintf(out, "real %ld%c%02ld\n",
138                         after.tv_sec, decimal_point,
139                         after.tv_usec/10000);
140                 fprintf(out, "user %ld%c%02ld\n",
141                         ru.ru_utime.tv_sec, decimal_point,
142                         ru.ru_utime.tv_usec/10000);
143                 fprintf(out, "sys %ld%c%02ld\n",
144                         ru.ru_stime.tv_sec, decimal_point,
145                         ru.ru_stime.tv_usec/10000);
146         } else if (hflag) {
147                 humantime(out, after.tv_sec, after.tv_usec/10000);
148                 fprintf(out, " real\t");
149                 humantime(out, ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000);
150                 fprintf(out, " user\t");
151                 humantime(out, ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000);
152                 fprintf(out, " sys\n");
153         } else {
154                 fprintf(out, "%9ld%c%02ld real ",
155                         after.tv_sec, decimal_point,
156                         after.tv_usec/10000);
157                 fprintf(out, "%9ld%c%02ld user ",
158                         ru.ru_utime.tv_sec, decimal_point,
159                         ru.ru_utime.tv_usec/10000);
160                 fprintf(out, "%9ld%c%02ld sys\n",
161                         ru.ru_stime.tv_sec, decimal_point,
162                         ru.ru_stime.tv_usec/10000);
163         }
164         if (lflag) {
165                 int hz = getstathz();
166                 u_long ticks;
167
168                 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) +
169                      hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000;
170
171                 /*
172                  * If our round-off on the tick calculation still puts us at 0,
173                  * then always assume at least one tick.
174                  */
175                 if (ticks == 0)
176                         ticks = 1;
177
178                 fprintf(out, "%10ld  %s\n",
179                         ru.ru_maxrss, "maximum resident set size");
180                 fprintf(out, "%10ld  %s\n",
181                         ru.ru_ixrss / ticks, "average shared memory size");
182                 fprintf(out, "%10ld  %s\n",
183                         ru.ru_idrss / ticks, "average unshared data size");
184                 fprintf(out, "%10ld  %s\n",
185                         ru.ru_isrss / ticks, "average unshared stack size");
186                 fprintf(out, "%10ld  %s\n",
187                         ru.ru_minflt, "page reclaims");
188                 fprintf(out, "%10ld  %s\n",
189                         ru.ru_majflt, "page faults");
190                 fprintf(out, "%10ld  %s\n",
191                         ru.ru_nswap, "swaps");
192                 fprintf(out, "%10ld  %s\n",
193                         ru.ru_inblock, "block input operations");
194                 fprintf(out, "%10ld  %s\n",
195                         ru.ru_oublock, "block output operations");
196                 fprintf(out, "%10ld  %s\n",
197                         ru.ru_msgsnd, "messages sent");
198                 fprintf(out, "%10ld  %s\n",
199                         ru.ru_msgrcv, "messages received");
200                 fprintf(out, "%10ld  %s\n",
201                         ru.ru_nsignals, "signals received");
202                 fprintf(out, "%10ld  %s\n",
203                         ru.ru_nvcsw, "voluntary context switches");
204                 fprintf(out, "%10ld  %s\n",
205                         ru.ru_nivcsw, "involuntary context switches");
206         }
207         if (exitonsig) {
208                 if (signal(exitonsig, SIG_DFL) == SIG_ERR)
209                         perror("signal");
210                 else
211                         kill(getpid(), exitonsig);
212         }
213         exit (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE);
214 }
215
216 static void
217 usage()
218 {
219         fprintf(stderr,
220             "usage: time [-al] [-h|-p] [-o file] utility [argument ...]\n");
221         exit(1);
222 }
223
224 /*
225  * Return the frequency of the kernel's statistics clock.
226  */
227 static int
228 getstathz()
229 {
230         struct clockinfo clockrate;
231         int mib[2];
232         size_t size;
233
234         mib[0] = CTL_KERN;
235         mib[1] = KERN_CLOCKRATE;
236         size = sizeof clockrate;
237         if (sysctl(mib, 2, &clockrate, &size, NULL, 0) == -1)
238                 err(1, "sysctl kern.clockrate");
239         return clockrate.stathz;
240 }
241
242 static void
243 humantime(out, sec, usec)
244         FILE *out;
245         long sec;
246         long usec;
247 {
248         long days, hrs, mins;
249
250         days = sec / (60L * 60 * 24);
251         sec %= (60L * 60 * 24);
252         hrs = sec / (60L * 60);
253         sec %= (60L * 60);
254         mins = sec / 60;
255         sec %= 60;
256
257         fprintf(out, "\t");
258         if (days)
259                 fprintf(out, "%ldd", days);
260         if (hrs)
261                 fprintf(out, "%ldh", hrs);
262         if (mins)
263                 fprintf(out, "%ldm", mins);
264         fprintf(out, "%ld%c%02lds", sec, decimal_point, usec);
265 }