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/resource.h> 50 #include <sys/signal.h> 51 #include <sys/sysctl.h> 52 #include <sys/time.h> 53 #include <sys/wait.h> 54 55 #include <err.h> 56 #include <errno.h> 57 #include <locale.h> 58 #include <signal.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <stdint.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 static int getstathz(void); 66 static void humantime(FILE *, long, long); 67 static void showtime(FILE *, struct timeval *, struct timeval *, 68 struct rusage *); 69 static void siginfo(int); 70 static void usage(void); 71 72 static char decimal_point; 73 static struct timeval before_tv; 74 static int hflag, pflag; 75 76 int 77 main(int argc, char **argv) 78 { 79 int aflag, ch, lflag, status; 80 int exitonsig; 81 pid_t pid; 82 struct rlimit rl; 83 struct rusage ru; 84 struct timeval after; 85 char *ofn = NULL; 86 FILE *out = stderr; 87 88 (void) setlocale(LC_NUMERIC, ""); 89 decimal_point = localeconv()->decimal_point[0]; 90 91 aflag = hflag = lflag = pflag = 0; 92 while ((ch = getopt(argc, argv, "ahlo:p")) != -1) 93 switch((char)ch) { 94 case 'a': 95 aflag = 1; 96 break; 97 case 'h': 98 hflag = 1; 99 break; 100 case 'l': 101 lflag = 1; 102 break; 103 case 'o': 104 ofn = optarg; 105 break; 106 case 'p': 107 pflag = 1; 108 break; 109 case '?': 110 default: 111 usage(); 112 } 113 114 if (!(argc -= optind)) 115 exit(0); 116 argv += optind; 117 118 if (ofn) { 119 if ((out = fopen(ofn, aflag ? "a" : "w")) == NULL) 120 err(1, "%s", ofn); 121 setvbuf(out, (char *)NULL, _IONBF, (size_t)0); 122 } 123 124 gettimeofday(&before_tv, (struct timezone *)NULL); 125 switch(pid = fork()) { 126 case -1: /* error */ 127 err(1, "time"); 128 /* NOTREACHED */ 129 case 0: /* child */ 130 if (ofn) 131 fclose(out); 132 execvp(*argv, argv); 133 err(errno == ENOENT ? 127 : 126, "%s", *argv); 134 /* NOTREACHED */ 135 } 136 /* parent */ 137 (void)signal(SIGINT, SIG_IGN); 138 (void)signal(SIGQUIT, SIG_IGN); 139 (void)signal(SIGINFO, siginfo); 140 while (wait4(pid, &status, 0, &ru) != pid); 141 gettimeofday(&after, (struct timezone *)NULL); 142 if ( ! WIFEXITED(status)) 143 warnx("command terminated abnormally"); 144 exitonsig = WIFSIGNALED(status) ? WTERMSIG(status) : 0; 145 showtime(out, &before_tv, &after, &ru); 146 if (lflag) { 147 int hz = getstathz(); 148 u_long ticks; 149 150 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 151 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 152 153 /* 154 * If our round-off on the tick calculation still puts us at 0, 155 * then always assume at least one tick. 156 */ 157 if (ticks == 0) 158 ticks = 1; 159 160 fprintf(out, "%10ld %s\n", 161 ru.ru_maxrss, "maximum resident set size"); 162 fprintf(out, "%10ld %s\n", 163 ru.ru_ixrss / ticks, "average shared memory size"); 164 fprintf(out, "%10ld %s\n", 165 ru.ru_idrss / ticks, "average unshared data size"); 166 fprintf(out, "%10ld %s\n", 167 ru.ru_isrss / ticks, "average unshared stack size"); 168 fprintf(out, "%10ld %s\n", 169 ru.ru_minflt, "page reclaims"); 170 fprintf(out, "%10ld %s\n", 171 ru.ru_majflt, "page faults"); 172 fprintf(out, "%10ld %s\n", 173 ru.ru_nswap, "swaps"); 174 fprintf(out, "%10ld %s\n", 175 ru.ru_inblock, "block input operations"); 176 fprintf(out, "%10ld %s\n", 177 ru.ru_oublock, "block output operations"); 178 fprintf(out, "%10ld %s\n", 179 ru.ru_msgsnd, "messages sent"); 180 fprintf(out, "%10ld %s\n", 181 ru.ru_msgrcv, "messages received"); 182 fprintf(out, "%10ld %s\n", 183 ru.ru_nsignals, "signals received"); 184 fprintf(out, "%10ld %s\n", 185 ru.ru_nvcsw, "voluntary context switches"); 186 fprintf(out, "%10ld %s\n", 187 ru.ru_nivcsw, "involuntary context switches"); 188 } 189 /* 190 * If the child has exited on a signal, exit on the same 191 * signal, too, in order to reproduce the child's exit status. 192 * However, avoid actually dumping core from the current process. 193 */ 194 if (exitonsig) { 195 if (signal(exitonsig, SIG_DFL) == SIG_ERR) 196 warn("signal"); 197 else { 198 rl.rlim_max = rl.rlim_cur = 0; 199 if (setrlimit(RLIMIT_CORE, &rl) == -1) 200 warn("setrlimit"); 201 kill(getpid(), exitonsig); 202 } 203 } 204 exit (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE); 205 } 206 207 static void 208 usage(void) 209 { 210 fprintf(stderr, 211 "usage: time [-al] [-h | -p] [-o file] utility [argument ...]\n"); 212 exit(1); 213 } 214 215 /* 216 * Return the frequency of the kernel's statistics clock. 217 */ 218 static int 219 getstathz(void) 220 { 221 int mib[2]; 222 size_t size; 223 struct clockinfo clockrate; 224 225 mib[0] = CTL_KERN; 226 mib[1] = KERN_CLOCKRATE; 227 size = sizeof clockrate; 228 if (sysctl(mib, 2, &clockrate, &size, NULL, 0) == -1) 229 err(1, "sysctl kern.clockrate"); 230 return clockrate.stathz; 231 } 232 233 static void 234 humantime(FILE *out, long sec, long usec) 235 { 236 long days, hrs, mins; 237 238 days = sec / (60L * 60 * 24); 239 sec %= (60L * 60 * 24); 240 hrs = sec / (60L * 60); 241 sec %= (60L * 60); 242 mins = sec / 60; 243 sec %= 60; 244 245 fprintf(out, "\t"); 246 if (days) 247 fprintf(out, "%ldd", days); 248 if (hrs) 249 fprintf(out, "%ldh", hrs); 250 if (mins) 251 fprintf(out, "%ldm", mins); 252 fprintf(out, "%ld%c%02lds", sec, decimal_point, usec); 253 } 254 255 static void 256 showtime(FILE *out, struct timeval *before, struct timeval *after, 257 struct rusage *ru) 258 { 259 260 after->tv_sec -= before->tv_sec; 261 after->tv_usec -= before->tv_usec; 262 if (after->tv_usec < 0) 263 after->tv_sec--, after->tv_usec += 1000000; 264 265 if (pflag) { 266 /* POSIX wants output that must look like 267 "real %f\nuser %f\nsys %f\n" and requires 268 at least two digits after the radix. */ 269 fprintf(out, "real %jd%c%02ld\n", 270 (intmax_t)after->tv_sec, decimal_point, 271 after->tv_usec/10000); 272 fprintf(out, "user %jd%c%02ld\n", 273 (intmax_t)ru->ru_utime.tv_sec, decimal_point, 274 ru->ru_utime.tv_usec/10000); 275 fprintf(out, "sys %jd%c%02ld\n", 276 (intmax_t)ru->ru_stime.tv_sec, decimal_point, 277 ru->ru_stime.tv_usec/10000); 278 } else if (hflag) { 279 humantime(out, after->tv_sec, after->tv_usec/10000); 280 fprintf(out, " real\t"); 281 humantime(out, ru->ru_utime.tv_sec, ru->ru_utime.tv_usec/10000); 282 fprintf(out, " user\t"); 283 humantime(out, ru->ru_stime.tv_sec, ru->ru_stime.tv_usec/10000); 284 fprintf(out, " sys\n"); 285 } else { 286 fprintf(out, "%9jd%c%02ld real ", 287 (intmax_t)after->tv_sec, decimal_point, 288 after->tv_usec/10000); 289 fprintf(out, "%9jd%c%02ld user ", 290 (intmax_t)ru->ru_utime.tv_sec, decimal_point, 291 ru->ru_utime.tv_usec/10000); 292 fprintf(out, "%9jd%c%02ld sys\n", 293 (intmax_t)ru->ru_stime.tv_sec, decimal_point, 294 ru->ru_stime.tv_usec/10000); 295 } 296 } 297 298 static void 299 siginfo(int sig __unused) 300 { 301 struct timeval after; 302 struct rusage ru; 303 304 gettimeofday(&after, (struct timezone *)NULL); 305 getrusage(RUSAGE_CHILDREN, &ru); 306 showtime(stdout, &before_tv, &after, &ru); 307 } 308