1 /* $NetBSD: time.c,v 1.21 2011/08/31 16:24:58 plunky 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 1.21 2011/08/31 16:24:58 plunky 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 prtv(const char *, const char *, const struct timeval *, 62 const char *); 63 64 int 65 main(int argc, char ** volatile argv) 66 { 67 int pid; 68 int ch, status; 69 int volatile portableflag; 70 int volatile lflag; 71 int volatile cshflag; 72 const char *decpt; 73 const struct lconv *lconv; 74 struct timeval before, after; 75 struct rusage ru; 76 77 (void)setlocale(LC_ALL, ""); 78 79 cshflag = lflag = portableflag = 0; 80 while ((ch = getopt(argc, argv, "clp")) != -1) { 81 switch (ch) { 82 case 'c': 83 cshflag = 1; 84 portableflag = 0; 85 lflag = 0; 86 break; 87 case 'p': 88 portableflag = 1; 89 cshflag = 0; 90 lflag = 0; 91 break; 92 case 'l': 93 lflag = 1; 94 portableflag = 0; 95 cshflag = 0; 96 break; 97 case '?': 98 default: 99 usage(); 100 } 101 } 102 argc -= optind; 103 argv += optind; 104 105 if (argc < 1) 106 usage(); 107 108 gettimeofday(&before, NULL); 109 switch(pid = vfork()) { 110 case -1: /* error */ 111 err(EXIT_FAILURE, "Vfork failed"); 112 /* NOTREACHED */ 113 case 0: /* child */ 114 /* LINTED will return only on failure */ 115 execvp(*argv, argv); 116 err((errno == ENOENT) ? 127 : 126, "Can't exec `%s'", *argv); 117 /* NOTREACHED */ 118 } 119 120 /* parent */ 121 (void)signal(SIGINT, SIG_IGN); 122 (void)signal(SIGQUIT, SIG_IGN); 123 if ((pid = wait4(pid, &status, 0, &ru)) == -1) 124 err(EXIT_FAILURE, "wait4 %d failed", pid); 125 (void)gettimeofday(&after, NULL); 126 if (!WIFEXITED(status)) 127 warnx("Command terminated abnormally."); 128 timersub(&after, &before, &after); 129 130 if ((lconv = localeconv()) == NULL || 131 (decpt = lconv->decimal_point) == NULL) 132 decpt = "."; 133 134 if (cshflag) { 135 static struct rusage null_ru; 136 before.tv_sec = 0; 137 before.tv_usec = 0; 138 prusage(stderr, &null_ru, &ru, &after, &before); 139 } else if (portableflag) { 140 prtv("real ", decpt, &after, "\n"); 141 prtv("user ", decpt, &ru.ru_utime, "\n"); 142 prtv("sys ", decpt, &ru.ru_stime, "\n"); 143 } else { 144 prtv("", decpt, &after, " real "); 145 prtv("", decpt, &ru.ru_utime, " user "); 146 prtv("", decpt, &ru.ru_stime, " sys\n"); 147 } 148 149 if (lflag) { 150 int hz = (int)sysconf(_SC_CLK_TCK); 151 unsigned long long ticks; 152 #define SCALE(x) (long)(ticks ? x / ticks : 0) 153 154 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 155 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 156 prl(ru.ru_maxrss, "maximum resident set size"); 157 prl(SCALE(ru.ru_ixrss), "average shared memory size"); 158 prl(SCALE(ru.ru_idrss), "average unshared data size"); 159 prl(SCALE(ru.ru_isrss), "average unshared stack size"); 160 prl(ru.ru_minflt, "page reclaims"); 161 prl(ru.ru_majflt, "page faults"); 162 prl(ru.ru_nswap, "swaps"); 163 prl(ru.ru_inblock, "block input operations"); 164 prl(ru.ru_oublock, "block output operations"); 165 prl(ru.ru_msgsnd, "messages sent"); 166 prl(ru.ru_msgrcv, "messages received"); 167 prl(ru.ru_nsignals, "signals received"); 168 prl(ru.ru_nvcsw, "voluntary context switches"); 169 prl(ru.ru_nivcsw, "involuntary context switches"); 170 } 171 172 return (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE); 173 } 174 175 static void 176 usage(void) 177 { 178 179 (void)fprintf(stderr, "usage: %s [-clp] utility [argument ...]\n", 180 getprogname()); 181 exit(EXIT_FAILURE); 182 } 183 184 static void 185 prl(long val, const char *expn) 186 { 187 188 (void)fprintf(stderr, "%10ld %s\n", val, expn); 189 } 190 191 static void 192 prtv(const char *pre, const char *decpt, const struct timeval *tv, 193 const char *post) 194 { 195 196 (void)fprintf(stderr, "%s%9ld%s%02ld%s", pre, (long)tv->tv_sec, decpt, 197 (long)tv->tv_usec / 10000, post); 198 } 199