1 /* $NetBSD: time.c,v 1.22 2011/11/09 19:10:10 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 1.22 2011/11/09 19:10:10 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 int volatile cshflag; 74 const char *decpt; 75 const struct lconv *lconv; 76 struct timespec before, after; 77 struct rusage ru; 78 79 (void)setlocale(LC_ALL, ""); 80 81 cshflag = lflag = portableflag = 0; 82 while ((ch = getopt(argc, argv, "clp")) != -1) { 83 switch (ch) { 84 case 'c': 85 cshflag = 1; 86 portableflag = 0; 87 lflag = 0; 88 break; 89 case 'p': 90 portableflag = 1; 91 cshflag = 0; 92 lflag = 0; 93 break; 94 case 'l': 95 lflag = 1; 96 portableflag = 0; 97 cshflag = 0; 98 break; 99 case '?': 100 default: 101 usage(); 102 } 103 } 104 argc -= optind; 105 argv += optind; 106 107 if (argc < 1) 108 usage(); 109 110 (void)clock_gettime(CLOCK_MONOTONIC, &before); 111 switch(pid = vfork()) { 112 case -1: /* error */ 113 err(EXIT_FAILURE, "Vfork failed"); 114 /* NOTREACHED */ 115 case 0: /* child */ 116 /* LINTED will return only on failure */ 117 execvp(*argv, argv); 118 err((errno == ENOENT) ? 127 : 126, "Can't exec `%s'", *argv); 119 /* NOTREACHED */ 120 } 121 122 /* parent */ 123 (void)signal(SIGINT, SIG_IGN); 124 (void)signal(SIGQUIT, SIG_IGN); 125 if ((pid = wait4(pid, &status, 0, &ru)) == -1) 126 err(EXIT_FAILURE, "wait4 %d failed", pid); 127 (void)clock_gettime(CLOCK_MONOTONIC, &after); 128 if (!WIFEXITED(status)) 129 warnx("Command terminated abnormally."); 130 timespecsub(&after, &before, &after); 131 132 if ((lconv = localeconv()) == NULL || 133 (decpt = lconv->decimal_point) == NULL) 134 decpt = "."; 135 136 if (cshflag) { 137 static struct rusage null_ru; 138 before.tv_sec = 0; 139 before.tv_nsec = 0; 140 prusage(stderr, &null_ru, &ru, &after, &before); 141 } else if (portableflag) { 142 prts("real ", decpt, &after, "\n"); 143 prtv("user ", decpt, &ru.ru_utime, "\n"); 144 prtv("sys ", decpt, &ru.ru_stime, "\n"); 145 } else { 146 prts("", decpt, &after, " real "); 147 prtv("", decpt, &ru.ru_utime, " user "); 148 prtv("", decpt, &ru.ru_stime, " sys\n"); 149 } 150 151 if (lflag) { 152 int hz = (int)sysconf(_SC_CLK_TCK); 153 unsigned long long ticks; 154 #define SCALE(x) (long)(ticks ? x / ticks : 0) 155 156 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 157 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 158 prl(ru.ru_maxrss, "maximum resident set size"); 159 prl(SCALE(ru.ru_ixrss), "average shared memory size"); 160 prl(SCALE(ru.ru_idrss), "average unshared data size"); 161 prl(SCALE(ru.ru_isrss), "average unshared stack size"); 162 prl(ru.ru_minflt, "page reclaims"); 163 prl(ru.ru_majflt, "page faults"); 164 prl(ru.ru_nswap, "swaps"); 165 prl(ru.ru_inblock, "block input operations"); 166 prl(ru.ru_oublock, "block output operations"); 167 prl(ru.ru_msgsnd, "messages sent"); 168 prl(ru.ru_msgrcv, "messages received"); 169 prl(ru.ru_nsignals, "signals received"); 170 prl(ru.ru_nvcsw, "voluntary context switches"); 171 prl(ru.ru_nivcsw, "involuntary context switches"); 172 } 173 174 return (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE); 175 } 176 177 static void 178 usage(void) 179 { 180 181 (void)fprintf(stderr, "Usage: %s [-clp] utility [argument ...]\n", 182 getprogname()); 183 exit(EXIT_FAILURE); 184 } 185 186 static void 187 prl(long val, const char *expn) 188 { 189 190 (void)fprintf(stderr, "%10ld %s\n", val, expn); 191 } 192 193 static void 194 prts(const char *pre, const char *decpt, const struct timespec *ts, 195 const char *post) 196 { 197 198 (void)fprintf(stderr, "%s%9lld%s%02ld%s", pre, (long long)ts->tv_sec, 199 decpt, (long)ts->tv_nsec / 10000000, post); 200 } 201 202 static void 203 prtv(const char *pre, const char *decpt, const struct timeval *tv, 204 const char *post) 205 { 206 207 (void)fprintf(stderr, "%s%9lld%s%02ld%s", pre, (long long)tv->tv_sec, 208 decpt, (long)tv->tv_usec / 10000, post); 209 } 210