time.c revision 1.16
1 /* $NetBSD: time.c,v 1.16 2006/12/18 15:17:38 christos 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 1.16 2006/12/18 15:17:38 christos 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 ** volatile argv) 65 { 66 int pid; 67 int ch, status; 68 int volatile portableflag; 69 int volatile lflag; 70 const char *decpt; 71 const struct lconv *lconv; 72 struct timeval before, after; 73 struct rusage ru; 74 75 (void)setlocale(LC_ALL, ""); 76 77 lflag = portableflag = 0; 78 while ((ch = getopt(argc, argv, "lp")) != -1) { 79 switch (ch) { 80 case 'p': 81 portableflag = 1; 82 break; 83 case 'l': 84 lflag = 1; 85 break; 86 case '?': 87 default: 88 usage(); 89 } 90 } 91 argc -= optind; 92 argv += optind; 93 94 if (argc < 1) 95 usage(); 96 97 gettimeofday(&before, (struct timezone *)NULL); 98 switch(pid = vfork()) { 99 case -1: /* error */ 100 err(EXIT_FAILURE, "Vfork failed"); 101 /* NOTREACHED */ 102 case 0: /* child */ 103 /* LINTED will return only on failure */ 104 execvp(*argv, argv); 105 err((errno == ENOENT) ? 127 : 126, "Can't exec `%s'", *argv); 106 /* NOTREACHED */ 107 } 108 109 /* parent */ 110 (void)signal(SIGINT, SIG_IGN); 111 (void)signal(SIGQUIT, SIG_IGN); 112 if ((pid = wait4(pid, &status, 0, &ru)) == -1) 113 err(EXIT_FAILURE, "wait4 %d failed", pid); 114 (void)gettimeofday(&after, (struct timezone *)NULL); 115 if (!WIFEXITED(status)) 116 warnx("Command terminated abnormally."); 117 timersub(&after, &before, &after); 118 119 if ((lconv = localeconv()) == NULL || 120 (decpt = lconv->decimal_point) == NULL) 121 decpt = "."; 122 123 if (portableflag) { 124 prtv("real ", decpt, &after, "\n"); 125 prtv("user ", decpt, &ru.ru_utime, "\n"); 126 prtv("sys ", decpt, &ru.ru_stime, "\n"); 127 } else { 128 prtv("", decpt, &after, " real "); 129 prtv("", decpt, &ru.ru_utime, " user "); 130 prtv("", decpt, &ru.ru_stime, " sys\n"); 131 } 132 133 if (lflag) { 134 int hz = (int)sysconf(_SC_CLK_TCK); 135 unsigned long long ticks; 136 #define SCALE(x) (long)(ticks ? x / ticks : 0) 137 138 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 139 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 140 prl(ru.ru_maxrss, "maximum resident set size"); 141 prl(SCALE(ru.ru_ixrss), "average shared memory size"); 142 prl(SCALE(ru.ru_idrss), "average unshared data size"); 143 prl(SCALE(ru.ru_isrss), "average unshared stack size"); 144 prl(ru.ru_minflt, "page reclaims"); 145 prl(ru.ru_majflt, "page faults"); 146 prl(ru.ru_nswap, "swaps"); 147 prl(ru.ru_inblock, "block input operations"); 148 prl(ru.ru_oublock, "block output operations"); 149 prl(ru.ru_msgsnd, "messages sent"); 150 prl(ru.ru_msgrcv, "messages received"); 151 prl(ru.ru_nsignals, "signals received"); 152 prl(ru.ru_nvcsw, "voluntary context switches"); 153 prl(ru.ru_nivcsw, "involuntary context switches"); 154 } 155 156 return (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE); 157 } 158 159 static void 160 usage() 161 { 162 163 (void)fprintf(stderr, "usage: %s [-lp] utility [argument ...]\n", 164 getprogname()); 165 exit(EXIT_FAILURE); 166 } 167 168 static void 169 prl(long val, const char *expn) 170 { 171 172 (void)fprintf(stderr, "%10ld %s\n", val, expn); 173 } 174 175 static void 176 prtv(const char *pre, const char *decpt, const struct timeval *tv, 177 const char *post) 178 { 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 Tue Sep 23 14:10:03 GMT 2025