Replace all casts of NULL to something with NULL.
[games.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 1.11 2005/03/04 16:54:37 liamfoy Exp $
37  */
38
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>
45
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>
55
56 static void humantime(FILE *, long, long);
57 static void usage(void);
58
59 static char decimal_point;
60
61 int
62 main(int argc, char **argv)
63 {
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;
71
72         setlocale(LC_NUMERIC, "");
73         decimal_point = localeconv()->decimal_point[0];
74
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();
95                 }
96
97         if (!(argc -= optind))
98                 exit(0);
99         argv += optind;
100
101         if (ofn) {
102                 if ((out = fopen(ofn, aflag ? "a" : "w")) == NULL)
103                         err(1, "%s", ofn);
104                 setvbuf(out, NULL, _IONBF, (size_t)0);
105         }
106
107         if (gettimeofday(&before, 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 */
117         }
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 */
124                 ;
125         if (gettimeofday(&after, 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);
164         }
165         if (lflag) {
166                 int hz;
167                 u_long ticks;
168
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;
173
174                 /*
175                  * If our round-off on the tick calculation still puts us at 0,
176                  * then always assume at least one tick.
177                  */
178                 if (ticks == 0)
179                         ticks = 1;
180
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");
209         }
210         /*
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.
215          */
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);
221         }
222         exit(WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE);
223 }
224
225 static void
226 usage(void)
227 {
228         fprintf(stderr,
229             "usage: time [-al] [-h|-p] [-o file] utility [argument ...]\n");
230         exit(1);
231 }
232
233 static void
234 humantime(FILE *out, long sec, long usec)
235 {
236         long days, hrs, mins;
237
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;
244
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);
253 }