1 /* 2 * Copyright (c) 1987, 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1987, 1988, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)time.c 8.1 (Berkeley) 6/6/93 35 * $FreeBSD: src/usr.bin/time/time.c,v 1.14.2.5 2002/06/28 08:35:15 tjr Exp $ 36 * $DragonFly: src/usr.bin/time/time.c,v 1.2 2003/06/17 04:29:32 dillon Exp $ 37 */ 38 39 #include <sys/types.h> 40 #include <sys/time.h> 41 #include <sys/resource.h> 42 #include <sys/signal.h> 43 #include <sys/sysctl.h> 44 #include <stdlib.h> 45 #include <sys/wait.h> 46 47 #include <err.h> 48 #include <stdio.h> 49 #include <errno.h> 50 #include <locale.h> 51 #include <string.h> 52 #include <unistd.h> 53 #include <signal.h> 54 55 static int getstathz(void); 56 static void humantime(FILE *, long, long); 57 static void usage(void); 58 59 static char decimal_point; 60 61 int 62 main(argc, argv) 63 int argc; 64 char **argv; 65 { 66 register int pid; 67 int aflag, ch, hflag, lflag, status, pflag; 68 struct timeval before, after; 69 struct rusage ru; 70 FILE *out = stderr; 71 char *ofn = NULL; 72 int exitonsig = 0; /* Die with same signal as child */ 73 74 (void) setlocale(LC_NUMERIC, ""); 75 decimal_point = localeconv()->decimal_point[0]; 76 77 aflag = hflag = lflag = pflag = 0; 78 while ((ch = getopt(argc, argv, "ahlo:p")) != -1) 79 switch((char)ch) { 80 case 'a': 81 aflag = 1; 82 break; 83 case 'h': 84 hflag = 1; 85 break; 86 case 'l': 87 lflag = 1; 88 break; 89 case 'o': 90 ofn = optarg; 91 break; 92 case 'p': 93 pflag = 1; 94 break; 95 case '?': 96 default: 97 usage(); 98 } 99 100 if (!(argc -= optind)) 101 exit(0); 102 argv += optind; 103 104 if (ofn) { 105 if ((out = fopen(ofn, aflag ? "a" : "w")) == NULL) 106 err(1, "%s", ofn); 107 setvbuf(out, (char *)NULL, _IONBF, (size_t)0); 108 } 109 110 gettimeofday(&before, (struct timezone *)NULL); 111 switch(pid = fork()) { 112 case -1: /* error */ 113 err(1, "time"); 114 /* NOTREACHED */ 115 case 0: /* child */ 116 execvp(*argv, argv); 117 err(errno == ENOENT ? 127 : 126, "%s", *argv); 118 /* NOTREACHED */ 119 } 120 /* parent */ 121 (void)signal(SIGINT, SIG_IGN); 122 (void)signal(SIGQUIT, SIG_IGN); 123 while (wait3(&status, 0, &ru) != pid); /* XXX use waitpid */ 124 gettimeofday(&after, (struct timezone *)NULL); 125 if ( ! WIFEXITED(status)) 126 warnx("command terminated abnormally"); 127 if (WIFSIGNALED(status)) 128 exitonsig = WTERMSIG(status); 129 after.tv_sec -= before.tv_sec; 130 after.tv_usec -= before.tv_usec; 131 if (after.tv_usec < 0) 132 after.tv_sec--, after.tv_usec += 1000000; 133 if (pflag) { 134 /* POSIX wants output that must look like 135 "real %f\nuser %f\nsys %f\n" and requires 136 at least two digits after the radix. */ 137 fprintf(out, "real %ld%c%02ld\n", 138 after.tv_sec, decimal_point, 139 after.tv_usec/10000); 140 fprintf(out, "user %ld%c%02ld\n", 141 ru.ru_utime.tv_sec, decimal_point, 142 ru.ru_utime.tv_usec/10000); 143 fprintf(out, "sys %ld%c%02ld\n", 144 ru.ru_stime.tv_sec, decimal_point, 145 ru.ru_stime.tv_usec/10000); 146 } else if (hflag) { 147 humantime(out, after.tv_sec, after.tv_usec/10000); 148 fprintf(out, " real\t"); 149 humantime(out, ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000); 150 fprintf(out, " user\t"); 151 humantime(out, ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000); 152 fprintf(out, " sys\n"); 153 } else { 154 fprintf(out, "%9ld%c%02ld real ", 155 after.tv_sec, decimal_point, 156 after.tv_usec/10000); 157 fprintf(out, "%9ld%c%02ld user ", 158 ru.ru_utime.tv_sec, decimal_point, 159 ru.ru_utime.tv_usec/10000); 160 fprintf(out, "%9ld%c%02ld sys\n", 161 ru.ru_stime.tv_sec, decimal_point, 162 ru.ru_stime.tv_usec/10000); 163 } 164 if (lflag) { 165 int hz = getstathz(); 166 u_long ticks; 167 168 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 169 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 170 171 /* 172 * If our round-off on the tick calculation still puts us at 0, 173 * then always assume at least one tick. 174 */ 175 if (ticks == 0) 176 ticks = 1; 177 178 fprintf(out, "%10ld %s\n", 179 ru.ru_maxrss, "maximum resident set size"); 180 fprintf(out, "%10ld %s\n", 181 ru.ru_ixrss / ticks, "average shared memory size"); 182 fprintf(out, "%10ld %s\n", 183 ru.ru_idrss / ticks, "average unshared data size"); 184 fprintf(out, "%10ld %s\n", 185 ru.ru_isrss / ticks, "average unshared stack size"); 186 fprintf(out, "%10ld %s\n", 187 ru.ru_minflt, "page reclaims"); 188 fprintf(out, "%10ld %s\n", 189 ru.ru_majflt, "page faults"); 190 fprintf(out, "%10ld %s\n", 191 ru.ru_nswap, "swaps"); 192 fprintf(out, "%10ld %s\n", 193 ru.ru_inblock, "block input operations"); 194 fprintf(out, "%10ld %s\n", 195 ru.ru_oublock, "block output operations"); 196 fprintf(out, "%10ld %s\n", 197 ru.ru_msgsnd, "messages sent"); 198 fprintf(out, "%10ld %s\n", 199 ru.ru_msgrcv, "messages received"); 200 fprintf(out, "%10ld %s\n", 201 ru.ru_nsignals, "signals received"); 202 fprintf(out, "%10ld %s\n", 203 ru.ru_nvcsw, "voluntary context switches"); 204 fprintf(out, "%10ld %s\n", 205 ru.ru_nivcsw, "involuntary context switches"); 206 } 207 if (exitonsig) { 208 if (signal(exitonsig, SIG_DFL) == SIG_ERR) 209 perror("signal"); 210 else 211 kill(getpid(), exitonsig); 212 } 213 exit (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE); 214 } 215 216 static void 217 usage() 218 { 219 fprintf(stderr, 220 "usage: time [-al] [-h|-p] [-o file] utility [argument ...]\n"); 221 exit(1); 222 } 223 224 /* 225 * Return the frequency of the kernel's statistics clock. 226 */ 227 static int 228 getstathz() 229 { 230 struct clockinfo clockrate; 231 int mib[2]; 232 size_t size; 233 234 mib[0] = CTL_KERN; 235 mib[1] = KERN_CLOCKRATE; 236 size = sizeof clockrate; 237 if (sysctl(mib, 2, &clockrate, &size, NULL, 0) == -1) 238 err(1, "sysctl kern.clockrate"); 239 return clockrate.stathz; 240 } 241 242 static void 243 humantime(out, sec, usec) 244 FILE *out; 245 long sec; 246 long usec; 247 { 248 long days, hrs, mins; 249 250 days = sec / (60L * 60 * 24); 251 sec %= (60L * 60 * 24); 252 hrs = sec / (60L * 60); 253 sec %= (60L * 60); 254 mins = sec / 60; 255 sec %= 60; 256 257 fprintf(out, "\t"); 258 if (days) 259 fprintf(out, "%ldd", days); 260 if (hrs) 261 fprintf(out, "%ldh", hrs); 262 if (mins) 263 fprintf(out, "%ldm", mins); 264 fprintf(out, "%ld%c%02lds", sec, decimal_point, usec); 265 } 266