time.c revision 1.23
1 /* $NetBSD: time.c,v 1.23 2017/07/15 14:34:08 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\ 35 The Regents of the University of California. All rights reserved."); 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 1.23 2017/07/15 14:34:08 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 #include "ext.h" 58 59 __dead static void usage(void); 60 static void prl(long, const char *); 61 static void prts(const char *, const char *, const struct timespec *, 62 const char *); 63 static void prtv(const char *, const char *, const struct timeval *, 64 const char *); 65 66 int 67 main(int argc, char ** volatile argv) 68 { 69 int pid; 70 int ch, status; 71 int volatile portableflag; 72 int volatile lflag; 73 const char *decpt; 74 const char *fmt; 75 const struct lconv *lconv; 76 struct timespec before, after; 77 struct rusage ru; 78 79 (void)setlocale(LC_ALL, ""); 80 81 lflag = portableflag = 0; 82 fmt = NULL; 83 while ((ch = getopt(argc, argv, "cf:lp")) != -1) { 84 switch (ch) { 85 case 'f': 86 fmt = optarg; 87 portableflag = 0; 88 lflag = 0; 89 break; 90 case 'c': 91 fmt = "%Uu %Ss %E %P %X+%Dk %I+%Oio %Fpf+%Ww"; 92 portableflag = 0; 93 lflag = 0; 94 break; 95 case 'p': 96 portableflag = 1; 97 fmt = NULL; 98 lflag = 0; 99 break; 100 case 'l': 101 lflag = 1; 102 portableflag = 0; 103 fmt = NULL; 104 break; 105 case '?': 106 default: 107 usage(); 108 } 109 } 110 argc -= optind; 111 argv += optind; 112 113 if (argc < 1) 114 usage(); 115 116 (void)clock_gettime(CLOCK_MONOTONIC, &before); 117 switch(pid = vfork()) { 118 case -1: /* error */ 119 err(EXIT_FAILURE, "Vfork failed"); 120 /* NOTREACHED */ 121 case 0: /* child */ 122 /* LINTED will return only on failure */ 123 execvp(*argv, argv); 124 err((errno == ENOENT) ? 127 : 126, "Can't exec `%s'", *argv); 125 /* NOTREACHED */ 126 } 127 128 /* parent */ 129 (void)signal(SIGINT, SIG_IGN); 130 (void)signal(SIGQUIT, SIG_IGN); 131 if ((pid = wait4(pid, &status, 0, &ru)) == -1) 132 err(EXIT_FAILURE, "wait4 %d failed", pid); 133 (void)clock_gettime(CLOCK_MONOTONIC, &after); 134 if (!WIFEXITED(status)) 135 warnx("Command terminated abnormally."); 136 timespecsub(&after, &before, &after); 137 138 if ((lconv = localeconv()) == NULL || 139 (decpt = lconv->decimal_point) == NULL) 140 decpt = "."; 141 142 if (fmt) { 143 static struct rusage null_ru; 144 before.tv_sec = 0; 145 before.tv_nsec = 0; 146 prusage1(stderr, fmt, &null_ru, &ru, &after, &before); 147 } else if (portableflag) { 148 prts("real ", decpt, &after, "\n"); 149 prtv("user ", decpt, &ru.ru_utime, "\n"); 150 prtv("sys ", decpt, &ru.ru_stime, "\n"); 151 } else { 152 prts("", decpt, &after, " real "); 153 prtv("", decpt, &ru.ru_utime, " user "); 154 prtv("", decpt, &ru.ru_stime, " sys\n"); 155 } 156 157 if (lflag) { 158 int hz = (int)sysconf(_SC_CLK_TCK); 159 unsigned long long ticks; 160 #define SCALE(x) (long)(ticks ? x / ticks : 0) 161 162 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 163 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 164 prl(ru.ru_maxrss, "maximum resident set size"); 165 prl(SCALE(ru.ru_ixrss), "average shared memory size"); 166 prl(SCALE(ru.ru_idrss), "average unshared data size"); 167 prl(SCALE(ru.ru_isrss), "average unshared stack size"); 168 prl(ru.ru_minflt, "page reclaims"); 169 prl(ru.ru_majflt, "page faults"); 170 prl(ru.ru_nswap, "swaps"); 171 prl(ru.ru_inblock, "block input operations"); 172 prl(ru.ru_oublock, "block output operations"); 173 prl(ru.ru_msgsnd, "messages sent"); 174 prl(ru.ru_msgrcv, "messages received"); 175 prl(ru.ru_nsignals, "signals received"); 176 prl(ru.ru_nvcsw, "voluntary context switches"); 177 prl(ru.ru_nivcsw, "involuntary context switches"); 178 } 179 180 return (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE); 181 } 182 183 static void 184 usage(void) 185 { 186 187 (void)fprintf(stderr, "Usage: %s [-clp] [-f <fmt>] utility [argument ...]\n", 188 getprogname()); 189 exit(EXIT_FAILURE); 190 } 191 192 static void 193 prl(long val, const char *expn) 194 { 195 196 (void)fprintf(stderr, "%10ld %s\n", val, expn); 197 } 198 199 static void 200 prts(const char *pre, const char *decpt, const struct timespec *ts, 201 const char *post) 202 { 203 204 (void)fprintf(stderr, "%s%9lld%s%02ld%s", pre, (long long)ts->tv_sec, 205 decpt, (long)ts->tv_nsec / 10000000, post); 206 } 207 208 static void 209 prtv(const char *pre, const char *decpt, const struct timeval *tv, 210 const char *post) 211 { 212 213 (void)fprintf(stderr, "%s%9lld%s%02ld%s", pre, (long long)tv->tv_sec, 214 decpt, (long)tv->tv_usec / 10000, post); 215 } 216
Indexes created Thu Sep 25 15:09:46 GMT 2025