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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1987, 1988, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif /* not lint */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)time.c 8.1 (Berkeley) 6/6/93"; 39 #endif 40 static const char rcsid[] = 41 "$FreeBSD$"; 42 #endif /* not lint */ 43 44 #include <sys/types.h> 45 #include <sys/resource.h> 46 #include <sys/signal.h> 47 #include <sys/sysctl.h> 48 #include <sys/time.h> 49 #include <sys/wait.h> 50 51 #include <err.h> 52 #include <errno.h> 53 #include <locale.h> 54 #include <signal.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <stdint.h> 58 #include <string.h> 59 #include <unistd.h> 60 61 static int getstathz(void); 62 static void humantime(FILE *, long, long); 63 static void showtime(FILE *, struct timeval *, struct timeval *, 64 struct rusage *); 65 static void siginfo(int); 66 static void usage(void); 67 68 static sig_atomic_t siginfo_recvd; 69 static char decimal_point; 70 static struct timeval before_tv; 71 static int hflag, pflag; 72 73 int 74 main(int argc, char **argv) 75 { 76 int aflag, ch, lflag, status; 77 int exitonsig; 78 pid_t pid; 79 struct rlimit rl; 80 struct rusage ru; 81 struct timeval after; 82 char *ofn = NULL; 83 FILE *out = stderr; 84 85 (void) setlocale(LC_NUMERIC, ""); 86 decimal_point = localeconv()->decimal_point[0]; 87 88 aflag = hflag = lflag = pflag = 0; 89 while ((ch = getopt(argc, argv, "ahlo:p")) != -1) 90 switch((char)ch) { 91 case 'a': 92 aflag = 1; 93 break; 94 case 'h': 95 hflag = 1; 96 break; 97 case 'l': 98 lflag = 1; 99 break; 100 case 'o': 101 ofn = optarg; 102 break; 103 case 'p': 104 pflag = 1; 105 break; 106 case '?': 107 default: 108 usage(); 109 } 110 111 if (!(argc -= optind)) 112 exit(0); 113 argv += optind; 114 115 if (ofn) { 116 if ((out = fopen(ofn, aflag ? "ae" : "we")) == NULL) 117 err(1, "%s", ofn); 118 setvbuf(out, (char *)NULL, _IONBF, (size_t)0); 119 } 120 121 (void)gettimeofday(&before_tv, NULL); 122 switch(pid = fork()) { 123 case -1: /* error */ 124 err(1, "time"); 125 /* NOTREACHED */ 126 case 0: /* child */ 127 execvp(*argv, argv); 128 err(errno == ENOENT ? 127 : 126, "%s", *argv); 129 /* NOTREACHED */ 130 } 131 /* parent */ 132 (void)signal(SIGINT, SIG_IGN); 133 (void)signal(SIGQUIT, SIG_IGN); 134 siginfo_recvd = 0; 135 (void)signal(SIGINFO, siginfo); 136 (void)siginterrupt(SIGINFO, 1); 137 while (wait4(pid, &status, 0, &ru) != pid) { 138 if (siginfo_recvd) { 139 siginfo_recvd = 0; 140 (void)gettimeofday(&after, NULL); 141 getrusage(RUSAGE_CHILDREN, &ru); 142 showtime(stdout, &before_tv, &after, &ru); 143 } 144 } 145 (void)gettimeofday(&after, NULL); 146 if ( ! WIFEXITED(status)) 147 warnx("command terminated abnormally"); 148 exitonsig = WIFSIGNALED(status) ? WTERMSIG(status) : 0; 149 showtime(out, &before_tv, &after, &ru); 150 if (lflag) { 151 int hz = getstathz(); 152 u_long ticks; 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; 156 157 /* 158 * If our round-off on the tick calculation still puts us at 0, 159 * then always assume at least one tick. 160 */ 161 if (ticks == 0) 162 ticks = 1; 163 164 fprintf(out, "%10ld %s\n", 165 ru.ru_maxrss, "maximum resident set size"); 166 fprintf(out, "%10ld %s\n", 167 ru.ru_ixrss / ticks, "average shared memory size"); 168 fprintf(out, "%10ld %s\n", 169 ru.ru_idrss / ticks, "average unshared data size"); 170 fprintf(out, "%10ld %s\n", 171 ru.ru_isrss / ticks, "average unshared stack size"); 172 fprintf(out, "%10ld %s\n", 173 ru.ru_minflt, "page reclaims"); 174 fprintf(out, "%10ld %s\n", 175 ru.ru_majflt, "page faults"); 176 fprintf(out, "%10ld %s\n", 177 ru.ru_nswap, "swaps"); 178 fprintf(out, "%10ld %s\n", 179 ru.ru_inblock, "block input operations"); 180 fprintf(out, "%10ld %s\n", 181 ru.ru_oublock, "block output operations"); 182 fprintf(out, "%10ld %s\n", 183 ru.ru_msgsnd, "messages sent"); 184 fprintf(out, "%10ld %s\n", 185 ru.ru_msgrcv, "messages received"); 186 fprintf(out, "%10ld %s\n", 187 ru.ru_nsignals, "signals received"); 188 fprintf(out, "%10ld %s\n", 189 ru.ru_nvcsw, "voluntary context switches"); 190 fprintf(out, "%10ld %s\n", 191 ru.ru_nivcsw, "involuntary context switches"); 192 } 193 /* 194 * If the child has exited on a signal, exit on the same 195 * signal, too, in order to reproduce the child's exit status. 196 * However, avoid actually dumping core from the current process. 197 */ 198 if (exitonsig) { 199 if (signal(exitonsig, SIG_DFL) == SIG_ERR) 200 warn("signal"); 201 else { 202 rl.rlim_max = rl.rlim_cur = 0; 203 if (setrlimit(RLIMIT_CORE, &rl) == -1) 204 warn("setrlimit"); 205 kill(getpid(), exitonsig); 206 } 207 } 208 exit (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE); 209 } 210 211 static void 212 usage(void) 213 { 214 fprintf(stderr, 215 "usage: time [-al] [-h | -p] [-o file] utility [argument ...]\n"); 216 exit(1); 217 } 218 219 /* 220 * Return the frequency of the kernel's statistics clock. 221 */ 222 static int 223 getstathz(void) 224 { 225 int mib[2]; 226 size_t size; 227 struct clockinfo clockrate; 228 229 mib[0] = CTL_KERN; 230 mib[1] = KERN_CLOCKRATE; 231 size = sizeof clockrate; 232 if (sysctl(mib, 2, &clockrate, &size, NULL, 0) == -1) 233 err(1, "sysctl kern.clockrate"); 234 return clockrate.stathz; 235 } 236 237 static void 238 humantime(FILE *out, long sec, long usec) 239 { 240 long days, hrs, mins; 241 242 days = sec / (60L * 60 * 24); 243 sec %= (60L * 60 * 24); 244 hrs = sec / (60L * 60); 245 sec %= (60L * 60); 246 mins = sec / 60; 247 sec %= 60; 248 249 fprintf(out, "\t"); 250 if (days) 251 fprintf(out, "%ldd", days); 252 if (hrs) 253 fprintf(out, "%ldh", hrs); 254 if (mins) 255 fprintf(out, "%ldm", mins); 256 fprintf(out, "%ld%c%02lds", sec, decimal_point, usec); 257 } 258 259 static void 260 showtime(FILE *out, struct timeval *before, struct timeval *after, 261 struct rusage *ru) 262 { 263 264 after->tv_sec -= before->tv_sec; 265 after->tv_usec -= before->tv_usec; 266 if (after->tv_usec < 0) 267 after->tv_sec--, after->tv_usec += 1000000; 268 269 if (pflag) { 270 /* POSIX wants output that must look like 271 "real %f\nuser %f\nsys %f\n" and requires 272 at least two digits after the radix. */ 273 fprintf(out, "real %jd%c%02ld\n", 274 (intmax_t)after->tv_sec, decimal_point, 275 after->tv_usec/10000); 276 fprintf(out, "user %jd%c%02ld\n", 277 (intmax_t)ru->ru_utime.tv_sec, decimal_point, 278 ru->ru_utime.tv_usec/10000); 279 fprintf(out, "sys %jd%c%02ld\n", 280 (intmax_t)ru->ru_stime.tv_sec, decimal_point, 281 ru->ru_stime.tv_usec/10000); 282 } else if (hflag) { 283 humantime(out, after->tv_sec, after->tv_usec/10000); 284 fprintf(out, " real\t"); 285 humantime(out, ru->ru_utime.tv_sec, ru->ru_utime.tv_usec/10000); 286 fprintf(out, " user\t"); 287 humantime(out, ru->ru_stime.tv_sec, ru->ru_stime.tv_usec/10000); 288 fprintf(out, " sys\n"); 289 } else { 290 fprintf(out, "%9jd%c%02ld real ", 291 (intmax_t)after->tv_sec, decimal_point, 292 after->tv_usec/10000); 293 fprintf(out, "%9jd%c%02ld user ", 294 (intmax_t)ru->ru_utime.tv_sec, decimal_point, 295 ru->ru_utime.tv_usec/10000); 296 fprintf(out, "%9jd%c%02ld sys\n", 297 (intmax_t)ru->ru_stime.tv_sec, decimal_point, 298 ru->ru_stime.tv_usec/10000); 299 } 300 } 301 302 static void 303 siginfo(int sig __unused) 304 { 305 306 siginfo_recvd = 1; 307 } 308