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. 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 * @(#) Copyright (c) 1987, 1988, 1993 The Regents of the University of California. All rights reserved. 30 * @(#)time.c 8.1 (Berkeley) 6/6/93 31 * $FreeBSD: src/usr.bin/time/time.c,v 1.14.2.5 2002/06/28 08:35:15 tjr Exp $ 32 */ 33 34 #include <sys/user.h> 35 #include <sys/time.h> 36 #include <sys/resource.h> 37 #include <sys/signal.h> 38 #include <sys/wait.h> 39 40 #include <err.h> 41 #include <errno.h> 42 #ifndef BOOTSTRAPPING 43 #include <kinfo.h> 44 #endif 45 #include <locale.h> 46 #include <signal.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <stdint.h> 50 #include <string.h> 51 #include <time.h> 52 #include <unistd.h> 53 54 static void humantime(FILE *, long, long); 55 static void showtime(FILE *, struct timespec *, struct timespec *, 56 struct rusage *); 57 static void siginfo(int); 58 59 static void usage(void); 60 61 static sig_atomic_t siginfo_recvd; 62 static char decimal_point; 63 struct timespec before_ts; 64 static int hflag, pflag; 65 66 int 67 main(int argc, char **argv) 68 { 69 pid_t pid; 70 int aflag, ch, lflag, status; 71 int exit_on_sig; 72 struct timespec after; 73 struct rusage ru; 74 FILE *out = stderr; 75 const char *ofn = NULL; 76 77 setlocale(LC_NUMERIC, ""); 78 decimal_point = localeconv()->decimal_point[0]; 79 80 aflag = hflag = lflag = pflag = 0; 81 while ((ch = getopt(argc, argv, "ahlo:p")) != -1) 82 switch (ch) { 83 case 'a': 84 aflag = 1; 85 break; 86 case 'h': 87 hflag = 1; 88 break; 89 case 'l': 90 #ifndef BOOTSTRAPPING 91 lflag = 1; 92 #endif 93 break; 94 case 'o': 95 ofn = optarg; 96 break; 97 case 'p': 98 pflag = 1; 99 break; 100 default: 101 usage(); 102 } 103 104 if (!(argc -= optind)) 105 exit(0); 106 argv += optind; 107 108 if (ofn) { 109 if ((out = fopen(ofn, aflag ? "ae" : "we")) == NULL) 110 err(1, "%s", ofn); 111 setvbuf(out, NULL, _IONBF, (size_t)0); 112 } 113 114 if (clock_gettime(CLOCK_MONOTONIC, &before_ts) == -1) 115 err(1, "clock_gettime failed"); 116 switch (pid = fork()) { 117 case -1: /* error */ 118 err(1, "could not fork"); 119 /* NOTREACHED */ 120 case 0: /* child */ 121 execvp(*argv, argv); 122 err(errno == ENOENT ? 127 : 126, "%s", *argv); 123 /* NOTREACHED */ 124 } 125 /* parent */ 126 if (signal(SIGINT, SIG_IGN) == SIG_ERR) 127 err(1, "signal failed"); 128 if (signal(SIGQUIT, SIG_IGN) == SIG_ERR) 129 err(1, "signal failed"); 130 siginfo_recvd = 0; 131 #ifdef SIGINFO 132 if (signal(SIGINFO, siginfo) == SIG_ERR) 133 err(1, "signal failed"); 134 siginterrupt(SIGINFO,1 ); 135 #endif 136 while (wait4(pid, &status, 0, &ru) != pid){ 137 if (siginfo_recvd) { 138 siginfo_recvd = 0; 139 if (clock_gettime(CLOCK_MONOTONIC, &after) == -1) 140 err(1, "clock_gettime failed"); 141 getrusage(RUSAGE_CHILDREN, &ru); 142 showtime(stdout, &before_ts, &after, &ru); 143 } 144 } 145 if (clock_gettime(CLOCK_MONOTONIC, &after) == -1) 146 err(1, "clock_gettime failed"); 147 if (!WIFEXITED(status)) 148 warnx("command terminated abnormally"); 149 exit_on_sig = WIFSIGNALED(status) ? WTERMSIG(status) : 0; 150 showtime(out, &before_ts, &after, &ru); 151 #ifndef BOOTSTRAPPING 152 if (lflag) { 153 int hz; 154 u_long ticks; 155 156 if (kinfo_get_sched_stathz(&hz)) 157 err(1, "kinfo_get_sched_stathz"); 158 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 159 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 160 161 /* 162 * If our round-off on the tick calculation still puts us at 0, 163 * then always assume at least one tick. 164 */ 165 if (ticks == 0) 166 ticks = 1; 167 168 fprintf(out, "%10ld %s\n", 169 ru.ru_maxrss, "maximum resident set size"); 170 fprintf(out, "%10ld %s\n", 171 ru.ru_ixrss / ticks, "average shared memory size"); 172 fprintf(out, "%10ld %s\n", 173 ru.ru_idrss / ticks, "average unshared data size"); 174 fprintf(out, "%10ld %s\n", 175 ru.ru_isrss / ticks, "average unshared stack size"); 176 fprintf(out, "%10ld %s\n", 177 ru.ru_minflt, "page reclaims"); 178 fprintf(out, "%10ld %s\n", 179 ru.ru_majflt, "page faults"); 180 fprintf(out, "%10ld %s\n", 181 ru.ru_nswap, "swaps"); 182 fprintf(out, "%10ld %s\n", 183 ru.ru_inblock, "block input operations"); 184 fprintf(out, "%10ld %s\n", 185 ru.ru_oublock, "block output operations"); 186 fprintf(out, "%10ld %s\n", 187 ru.ru_msgsnd, "messages sent"); 188 fprintf(out, "%10ld %s\n", 189 ru.ru_msgrcv, "messages received"); 190 fprintf(out, "%10ld %s\n", 191 ru.ru_nsignals, "signals received"); 192 fprintf(out, "%10ld %s\n", 193 ru.ru_nvcsw, "voluntary context switches"); 194 fprintf(out, "%10ld %s\n", 195 ru.ru_nivcsw, "involuntary context switches"); 196 } 197 #endif 198 /* 199 * If the child has exited on a signal, exit on the same 200 * signal, too, in order to reproduce the child's exit 201 * status. However, avoid actually dumping core from 202 * current process. 203 */ 204 if (exit_on_sig) { 205 if (signal(exit_on_sig, SIG_DFL) == SIG_ERR) 206 warn("signal failed"); 207 else 208 kill(getpid(), exit_on_sig); 209 } 210 exit(WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE); 211 } 212 213 static void 214 usage(void) 215 { 216 fprintf(stderr, 217 "usage: time [-al] [-h|-p] [-o file] utility [argument ...]\n"); 218 exit(1); 219 } 220 221 static void 222 humantime(FILE *out, long sec, long usec) 223 { 224 long days, hrs, mins; 225 226 days = sec / (60L * 60 * 24); 227 sec %= (60L * 60 * 24); 228 hrs = sec / (60L * 60); 229 sec %= (60L * 60); 230 mins = sec / 60; 231 sec %= 60; 232 233 fprintf(out, "\t"); 234 if (days) 235 fprintf(out, "%ldd", days); 236 if (hrs) 237 fprintf(out, "%ldh", hrs); 238 if (mins) 239 fprintf(out, "%ldm", mins); 240 fprintf(out, "%ld%c%02lds", sec, decimal_point, usec); 241 } 242 243 static void 244 showtime(FILE *out, struct timespec *before, struct timespec *after, 245 struct rusage *ru) 246 { 247 248 after->tv_sec -= before->tv_sec; 249 after->tv_nsec -= before->tv_nsec; 250 if (after->tv_nsec < 0) 251 after->tv_sec--, after->tv_nsec += 1000000000L; 252 253 if (pflag) { 254 /* POSIX wants output that must look like 255 "real %f\nuser %f\nsys %f\n" and requires 256 at least two digits after the radix. */ 257 fprintf(out, "real %jd%c%02ld\n", 258 (intmax_t)after->tv_sec, decimal_point, 259 after->tv_nsec/10000000L); 260 fprintf(out, "user %jd%c%02ld\n", 261 (intmax_t)ru->ru_utime.tv_sec, decimal_point, 262 ru->ru_utime.tv_usec/10000); 263 fprintf(out, "sys %jd%c%02ld\n", 264 (intmax_t)ru->ru_stime.tv_sec, decimal_point, 265 ru->ru_stime.tv_usec/10000); 266 } else if (hflag) { 267 humantime(out, after->tv_sec, after->tv_nsec/10000000); 268 fprintf(out, " real\t"); 269 humantime(out, ru->ru_utime.tv_sec, ru->ru_utime.tv_usec/10000); 270 fprintf(out, " user\t"); 271 humantime(out, ru->ru_stime.tv_sec, ru->ru_stime.tv_usec/10000); 272 fprintf(out, " sys\n"); 273 } else { 274 fprintf(out, "%9jd%c%02ld real ", 275 (intmax_t)after->tv_sec, decimal_point, 276 after->tv_nsec/10000000); 277 fprintf(out, "%9jd%c%02ld user ", 278 (intmax_t)ru->ru_utime.tv_sec, decimal_point, 279 ru->ru_utime.tv_usec/10000); 280 fprintf(out, "%9jd%c%02ld sys\n", 281 (intmax_t)ru->ru_stime.tv_sec, decimal_point, 282 ru->ru_stime.tv_usec/10000); 283 } 284 } 285 286 static void 287 siginfo(int sig __unused) 288 { 289 siginfo_recvd = 1; 290 } 291