time.c revision 1.13
1 /* $NetBSD: time.c,v 1.13 2003/08/07 11:16:15 agc 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\n\ 35 The Regents of the University of California. All rights reserved.\n"); 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 1.13 2003/08/07 11:16:15 agc 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 int main(int, char **); 58 static void usage(void); 59 static void prl(long, const char *); 60 static void prtv(const char *, const char *, const struct timeval *, 61 const char *); 62 63 int 64 main(int argc, char **argv) 65 { 66 int pid; 67 int ch, status; 68 int lflag, portableflag; 69 const char *decpt; 70 const struct lconv *lconv; 71 struct timeval before, after; 72 struct rusage ru; 73 74 #ifdef __GNUC__ /* XXX: borken gcc */ 75 (void)&argv; 76 #endif 77 78 (void)setlocale(LC_ALL, ""); 79 80 lflag = portableflag = 0; 81 while ((ch = getopt(argc, argv, "lp")) != -1) { 82 switch (ch) { 83 case 'p': 84 portableflag = 1; 85 break; 86 case 'l': 87 lflag = 1; 88 break; 89 case '?': 90 default: 91 usage(); 92 } 93 } 94 argc -= optind; 95 argv += optind; 96 97 if (argc < 1) 98 usage(); 99 100 gettimeofday(&before, (struct timezone *)NULL); 101 switch(pid = vfork()) { 102 case -1: /* error */ 103 err(EXIT_FAILURE, "Vfork failed"); 104 /* NOTREACHED */ 105 case 0: /* child */ 106 /* LINTED will return only on failure */ 107 execvp(*argv, argv); 108 err((errno == ENOENT) ? 127 : 126, "Can't exec `%s'", *argv); 109 /* NOTREACHED */ 110 } 111 112 /* parent */ 113 (void)signal(SIGINT, SIG_IGN); 114 (void)signal(SIGQUIT, SIG_IGN); 115 if ((pid = wait4(pid, &status, 0, &ru)) == -1) 116 err(EXIT_FAILURE, "wait4 %d failed", pid); 117 (void)gettimeofday(&after, (struct timezone *)NULL); 118 if (!WIFEXITED(status)) 119 warnx("Command terminated abnormally."); 120 timersub(&after, &before, &after); 121 122 if ((lconv = localeconv()) == NULL || 123 (decpt = lconv->decimal_point) == NULL) 124 decpt = "."; 125 126 if (portableflag) { 127 prtv("real ", decpt, &after, "\n"); 128 prtv("user ", decpt, &ru.ru_utime, "\n"); 129 prtv("sys ", decpt, &ru.ru_stime, "\n"); 130 } else { 131 prtv("", decpt, &after, " real "); 132 prtv("", decpt, &ru.ru_utime, " user "); 133 prtv("", decpt, &ru.ru_stime, " sys\n"); 134 } 135 136 if (lflag) { 137 int hz = (int)sysconf(_SC_CLK_TCK); 138 unsigned long long ticks; 139 #define SCALE(x) (long)(ticks ? x / ticks : 0) 140 141 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 142 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 143 prl(ru.ru_maxrss, "maximum resident set size"); 144 prl(SCALE(ru.ru_ixrss), "average shared memory size"); 145 prl(SCALE(ru.ru_idrss), "average unshared data size"); 146 prl(SCALE(ru.ru_isrss), "average unshared stack size"); 147 prl(ru.ru_minflt, "page reclaims"); 148 prl(ru.ru_majflt, "page faults"); 149 prl(ru.ru_nswap, "swaps"); 150 prl(ru.ru_inblock, "block input operations"); 151 prl(ru.ru_oublock, "block output operations"); 152 prl(ru.ru_msgsnd, "messages sent"); 153 prl(ru.ru_msgrcv, "messages received"); 154 prl(ru.ru_nsignals, "signals received"); 155 prl(ru.ru_nvcsw, "voluntary context switches"); 156 prl(ru.ru_nivcsw, "involuntary context switches"); 157 } 158 159 return (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE); 160 } 161 162 static void 163 usage() 164 { 165 (void)fprintf(stderr, "Usage: %s [-lp] utility [argument ...]\n", 166 getprogname()); 167 exit(EXIT_FAILURE); 168 } 169 170 static void 171 prl(long val, const char *expn) 172 { 173 (void)fprintf(stderr, "%10ld %s\n", val, expn); 174 } 175 176 static void 177 prtv(const char *pre, const char *decpt, const struct timeval *tv, 178 const char *post) 179 { 180 (void)fprintf(stderr, "%s%9ld%s%02ld%s", pre, (long)tv->tv_sec, decpt, 181 (long)tv->tv_usec / 10000, post); 182 } 183
Indexes created Wed Sep 24 05:09:52 GMT 2025