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 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1987, 1988, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)time.c 8.1 (Berkeley) 6/6/93"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <sys/types.h> 49 #include <sys/time.h> 50 #include <sys/resource.h> 51 #include <sys/signal.h> 52 #include <sys/sysctl.h> 53 #include <stdlib.h> 54 #include <sys/wait.h> 55 56 #include <err.h> 57 #include <stdio.h> 58 #include <errno.h> 59 #include <locale.h> 60 #include <string.h> 61 #include <unistd.h> 62 #include <signal.h> 63 64 static int getstathz(void); 65 static void humantime(FILE *, long, long); 66 static void usage(void); 67 68 static char decimal_point; 69 70 int 71 main(argc, argv) 72 int argc; 73 char **argv; 74 { 75 register int pid; 76 int aflag, ch, hflag, lflag, status, pflag; 77 struct timeval before, after; 78 struct rusage ru; 79 FILE *out = stderr; 80 char *ofn = NULL; 81 int exitonsig = 0; /* Die with same signal as child */ 82 83 (void) setlocale(LC_NUMERIC, ""); 84 decimal_point = localeconv()->decimal_point[0]; 85 86 aflag = hflag = lflag = pflag = 0; 87 while ((ch = getopt(argc, argv, "ahlo:p")) != -1) 88 switch((char)ch) { 89 case 'a': 90 aflag = 1; 91 break; 92 case 'h': 93 hflag = 1; 94 break; 95 case 'l': 96 lflag = 1; 97 break; 98 case 'o': 99 ofn = optarg; 100 break; 101 case 'p': 102 pflag = 1; 103 break; 104 case '?': 105 default: 106 usage(); 107 } 108 109 if (!(argc -= optind)) 110 exit(0); 111 argv += optind; 112 113 if (ofn) { 114 if ((out = fopen(ofn, aflag ? "a" : "w")) == NULL) 115 err(1, "%s", ofn); 116 setvbuf(out, (char *)NULL, _IONBF, (size_t)0); 117 } 118 119 gettimeofday(&before, (struct timezone *)NULL); 120 switch(pid = fork()) { 121 case -1: /* error */ 122 err(1, "time"); 123 /* NOTREACHED */ 124 case 0: /* child */ 125 execvp(*argv, argv); 126 err(errno == ENOENT ? 127 : 126, "%s", *argv); 127 /* NOTREACHED */ 128 } 129 /* parent */ 130 (void)signal(SIGINT, SIG_IGN); 131 (void)signal(SIGQUIT, SIG_IGN); 132 while (wait3(&status, 0, &ru) != pid); /* XXX use waitpid */ 133 gettimeofday(&after, (struct timezone *)NULL); 134 if ( ! WIFEXITED(status)) 135 warnx("command terminated abnormally"); 136 if (WIFSIGNALED(status)) 137 exitonsig = WTERMSIG(status); 138 after.tv_sec -= before.tv_sec; 139 after.tv_usec -= before.tv_usec; 140 if (after.tv_usec < 0) 141 after.tv_sec--, after.tv_usec += 1000000; 142 if (pflag) { 143 /* POSIX wants output that must look like 144 "real %f\nuser %f\nsys %f\n" and requires 145 at least two digits after the radix. */ 146 fprintf(out, "real %ld%c%02ld\n", 147 after.tv_sec, decimal_point, 148 after.tv_usec/10000); 149 fprintf(out, "user %ld%c%02ld\n", 150 ru.ru_utime.tv_sec, decimal_point, 151 ru.ru_utime.tv_usec/10000); 152 fprintf(out, "sys %ld%c%02ld\n", 153 ru.ru_stime.tv_sec, decimal_point, 154 ru.ru_stime.tv_usec/10000); 155 } else if (hflag) { 156 humantime(out, after.tv_sec, after.tv_usec/10000); 157 fprintf(out, " real\t"); 158 humantime(out, ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000); 159 fprintf(out, " user\t"); 160 humantime(out, ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000); 161 fprintf(out, " sys\n"); 162 } else { 163 fprintf(out, "%9ld%c%02ld real ", 164 after.tv_sec, decimal_point, 165 after.tv_usec/10000); 166 fprintf(out, "%9ld%c%02ld user ", 167 ru.ru_utime.tv_sec, decimal_point, 168 ru.ru_utime.tv_usec/10000); 169 fprintf(out, "%9ld%c%02ld sys\n", 170 ru.ru_stime.tv_sec, decimal_point, 171 ru.ru_stime.tv_usec/10000); 172 } 173 if (lflag) { 174 int hz = getstathz(); 175 u_long ticks; 176 177 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 178 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 179 180 /* 181 * If our round-off on the tick calculation still puts us at 0, 182 * then always assume at least one tick. 183 */ 184 if (ticks == 0) 185 ticks = 1; 186 187 fprintf(out, "%10ld %s\n", 188 ru.ru_maxrss, "maximum resident set size"); 189 fprintf(out, "%10ld %s\n", 190 ru.ru_ixrss / ticks, "average shared memory size"); 191 fprintf(out, "%10ld %s\n", 192 ru.ru_idrss / ticks, "average unshared data size"); 193 fprintf(out, "%10ld %s\n", 194 ru.ru_isrss / ticks, "average unshared stack size"); 195 fprintf(out, "%10ld %s\n", 196 ru.ru_minflt, "page reclaims"); 197 fprintf(out, "%10ld %s\n", 198 ru.ru_majflt, "page faults"); 199 fprintf(out, "%10ld %s\n", 200 ru.ru_nswap, "swaps"); 201 fprintf(out, "%10ld %s\n", 202 ru.ru_inblock, "block input operations"); 203 fprintf(out, "%10ld %s\n", 204 ru.ru_oublock, "block output operations"); 205 fprintf(out, "%10ld %s\n", 206 ru.ru_msgsnd, "messages sent"); 207 fprintf(out, "%10ld %s\n", 208 ru.ru_msgrcv, "messages received"); 209 fprintf(out, "%10ld %s\n", 210 ru.ru_nsignals, "signals received"); 211 fprintf(out, "%10ld %s\n", 212 ru.ru_nvcsw, "voluntary context switches"); 213 fprintf(out, "%10ld %s\n", 214 ru.ru_nivcsw, "involuntary context switches"); 215 } 216 if (exitonsig) { 217 if (signal(exitonsig, SIG_DFL) == SIG_ERR) 218 perror("signal"); 219 else 220 kill(getpid(), exitonsig); 221 } 222 exit (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE); 223 } 224 225 static void 226 usage() 227 { 228 fprintf(stderr, 229 "usage: time [-al] [-h|-p] [-o file] utility [argument ...]\n"); 230 exit(1); 231 } 232 233 /* 234 * Return the frequency of the kernel's statistics clock. 235 */ 236 static int 237 getstathz() 238 { 239 struct clockinfo clockrate; 240 int mib[2]; 241 size_t size; 242 243 mib[0] = CTL_KERN; 244 mib[1] = KERN_CLOCKRATE; 245 size = sizeof clockrate; 246 if (sysctl(mib, 2, &clockrate, &size, NULL, 0) == -1) 247 err(1, "sysctl kern.clockrate"); 248 return clockrate.stathz; 249 } 250 251 static void 252 humantime(out, sec, usec) 253 FILE *out; 254 long sec; 255 long usec; 256 { 257 long days, hrs, mins; 258 259 days = sec / (60L * 60 * 24); 260 sec %= (60L * 60 * 24); 261 hrs = sec / (60L * 60); 262 sec %= (60L * 60); 263 mins = sec / 60; 264 sec %= 60; 265 266 fprintf(out, "\t"); 267 if (days) 268 fprintf(out, "%ldd", days); 269 if (hrs) 270 fprintf(out, "%ldh", hrs); 271 if (mins) 272 fprintf(out, "%ldm", mins); 273 fprintf(out, "%ld%c%02lds", sec, decimal_point, usec); 274 } 275