time.c revision 1.17
1 /* $NetBSD: time.c,v 1.17 2007/02/24 21:30:27 matt 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 1.17 2007/02/24 21:30:27 matt 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 #include "ext.h" 58 59 int main(int, char **); 60 static void usage(void); 61 static void prl(long, const char *); 62 static void prtv(const char *, const char *, const struct timeval *, 63 const char *); 64 65 int 66 main(int argc, char ** volatile argv) 67 { 68 int pid; 69 int ch, status; 70 int volatile portableflag; 71 int volatile lflag; 72 int volatile cshflag; 73 const char *decpt; 74 const struct lconv *lconv; 75 struct timeval before, after; 76 struct rusage ru; 77 78 (void)setlocale(LC_ALL, ""); 79 80 cshflag = lflag = portableflag = 0; 81 while ((ch = getopt(argc, argv, "clp")) != -1) { 82 switch (ch) { 83 case 'c': 84 cshflag = 1; 85 break; 86 case 'p': 87 portableflag = 1; 88 break; 89 case 'l': 90 lflag = 1; 91 break; 92 case '?': 93 default: 94 usage(); 95 } 96 } 97 argc -= optind; 98 argv += optind; 99 100 if (argc < 1) 101 usage(); 102 103 gettimeofday(&before, (struct timezone *)NULL); 104 switch(pid = vfork()) { 105 case -1: /* error */ 106 err(EXIT_FAILURE, "Vfork failed"); 107 /* NOTREACHED */ 108 case 0: /* child */ 109 /* LINTED will return only on failure */ 110 execvp(*argv, argv); 111 err((errno == ENOENT) ? 127 : 126, "Can't exec `%s'", *argv); 112 /* NOTREACHED */ 113 } 114 115 /* parent */ 116 (void)signal(SIGINT, SIG_IGN); 117 (void)signal(SIGQUIT, SIG_IGN); 118 if ((pid = wait4(pid, &status, 0, &ru)) == -1) 119 err(EXIT_FAILURE, "wait4 %d failed", pid); 120 (void)gettimeofday(&after, (struct timezone *)NULL); 121 if (!WIFEXITED(status)) 122 warnx("Command terminated abnormally."); 123 timersub(&after, &before, &after); 124 125 if ((lconv = localeconv()) == NULL || 126 (decpt = lconv->decimal_point) == NULL) 127 decpt = "."; 128 129 if (cshflag) { 130 static struct rusage null_ru; 131 before.tv_sec = 0; 132 before.tv_usec = 0; 133 prusage(stderr, &null_ru, &ru, &after, &before); 134 } else if (portableflag) { 135 prtv("real ", decpt, &after, "\n"); 136 prtv("user ", decpt, &ru.ru_utime, "\n"); 137 prtv("sys ", decpt, &ru.ru_stime, "\n"); 138 } else { 139 prtv("", decpt, &after, " real "); 140 prtv("", decpt, &ru.ru_utime, " user "); 141 prtv("", decpt, &ru.ru_stime, " sys\n"); 142 } 143 144 if (lflag) { 145 int hz = (int)sysconf(_SC_CLK_TCK); 146 unsigned long long ticks; 147 #define SCALE(x) (long)(ticks ? x / ticks : 0) 148 149 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 150 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 151 prl(ru.ru_maxrss, "maximum resident set size"); 152 prl(SCALE(ru.ru_ixrss), "average shared memory size"); 153 prl(SCALE(ru.ru_idrss), "average unshared data size"); 154 prl(SCALE(ru.ru_isrss), "average unshared stack size"); 155 prl(ru.ru_minflt, "page reclaims"); 156 prl(ru.ru_majflt, "page faults"); 157 prl(ru.ru_nswap, "swaps"); 158 prl(ru.ru_inblock, "block input operations"); 159 prl(ru.ru_oublock, "block output operations"); 160 prl(ru.ru_msgsnd, "messages sent"); 161 prl(ru.ru_msgrcv, "messages received"); 162 prl(ru.ru_nsignals, "signals received"); 163 prl(ru.ru_nvcsw, "voluntary context switches"); 164 prl(ru.ru_nivcsw, "involuntary context switches"); 165 } 166 167 return (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE); 168 } 169 170 static void 171 usage() 172 { 173 174 (void)fprintf(stderr, "usage: %s [-clp] utility [argument ...]\n", 175 getprogname()); 176 exit(EXIT_FAILURE); 177 } 178 179 static void 180 prl(long val, const char *expn) 181 { 182 183 (void)fprintf(stderr, "%10ld %s\n", val, expn); 184 } 185 186 static void 187 prtv(const char *pre, const char *decpt, const struct timeval *tv, 188 const char *post) 189 { 190 191 (void)fprintf(stderr, "%s%9ld%s%02ld%s", pre, (long)tv->tv_sec, decpt, 192 (long)tv->tv_usec / 10000, post); 193 } 194
Indexes created Thu Oct 23 18:09:57 GMT 2025