1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1987, 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static const char copyright[] = 34 "@(#) Copyright (c) 1987, 1988, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)time.c 8.1 (Berkeley) 6/6/93"; 41 #endif 42 static const char rcsid[] = 43 "$FreeBSD$"; 44 #endif /* not lint */ 45 46 #include <sys/types.h> 47 #include <sys/resource.h> 48 #include <sys/signal.h> 49 #include <sys/sysctl.h> 50 #include <sys/time.h> 51 #include <sys/wait.h> 52 53 #include <err.h> 54 #include <errno.h> 55 #include <locale.h> 56 #include <signal.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <stdint.h> 60 #include <string.h> 61 #include <unistd.h> 62 63 static int getstathz(void); 64 static void humantime(FILE *, long, long); 65 static void showtime(FILE *, struct timeval *, struct timeval *, 66 struct rusage *); 67 static void siginfo(int); 68 static void usage(void); 69 70 static sig_atomic_t siginfo_recvd; 71 static char decimal_point; 72 static struct timeval before_tv; 73 static int hflag, pflag; 74 75 int 76 main(int argc, char **argv) 77 { 78 int aflag, ch, lflag, status; 79 int exitonsig; 80 pid_t pid; 81 struct rlimit rl; 82 struct rusage ru; 83 struct timeval after; 84 char *ofn = NULL; 85 FILE *out = stderr; 86 87 (void) setlocale(LC_NUMERIC, ""); 88 decimal_point = localeconv()->decimal_point[0]; 89 90 aflag = hflag = lflag = pflag = 0; 91 while ((ch = getopt(argc, argv, "ahlo:p")) != -1) 92 switch((char)ch) { 93 case 'a': 94 aflag = 1; 95 break; 96 case 'h': 97 hflag = 1; 98 break; 99 case 'l': 100 lflag = 1; 101 break; 102 case 'o': 103 ofn = optarg; 104 break; 105 case 'p': 106 pflag = 1; 107 break; 108 case '?': 109 default: 110 usage(); 111 } 112 113 if (!(argc -= optind)) 114 exit(0); 115 argv += optind; 116 117 if (ofn) { 118 if ((out = fopen(ofn, aflag ? "ae" : "we")) == NULL) 119 err(1, "%s", ofn); 120 setvbuf(out, (char *)NULL, _IONBF, (size_t)0); 121 } 122 123 (void)gettimeofday(&before_tv, NULL); 124 switch(pid = fork()) { 125 case -1: /* error */ 126 err(1, "time"); 127 /* NOTREACHED */ 128 case 0: /* child */ 129 execvp(*argv, argv); 130 err(errno == ENOENT ? 127 : 126, "%s", *argv); 131 /* NOTREACHED */ 132 } 133 /* parent */ 134 (void)signal(SIGINT, SIG_IGN); 135 (void)signal(SIGQUIT, SIG_IGN); 136 siginfo_recvd = 0; 137 (void)signal(SIGINFO, siginfo); 138 (void)siginterrupt(SIGINFO, 1); 139 while (wait4(pid, &status, 0, &ru) != pid) { 140 if (siginfo_recvd) { 141 siginfo_recvd = 0; 142 (void)gettimeofday(&after, NULL); 143 getrusage(RUSAGE_CHILDREN, &ru); 144 showtime(stdout, &before_tv, &after, &ru); 145 } 146 } 147 (void)gettimeofday(&after, NULL); 148 if ( ! WIFEXITED(status)) 149 warnx("command terminated abnormally"); 150 exitonsig = WIFSIGNALED(status) ? WTERMSIG(status) : 0; 151 showtime(out, &before_tv, &after, &ru); 152 if (lflag) { 153 int hz = getstathz(); 154 u_long ticks; 155 156 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 157 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 158 159 /* 160 * If our round-off on the tick calculation still puts us at 0, 161 * then always assume at least one tick. 162 */ 163 if (ticks == 0) 164 ticks = 1; 165 166 fprintf(out, "%10ld %s\n", 167 ru.ru_maxrss, "maximum resident set size"); 168 fprintf(out, "%10ld %s\n", 169 ru.ru_ixrss / ticks, "average shared memory size"); 170 fprintf(out, "%10ld %s\n", 171 ru.ru_idrss / ticks, "average unshared data size"); 172 fprintf(out, "%10ld %s\n", 173 ru.ru_isrss / ticks, "average unshared stack size"); 174 fprintf(out, "%10ld %s\n", 175 ru.ru_minflt, "page reclaims"); 176 fprintf(out, "%10ld %s\n", 177 ru.ru_majflt, "page faults"); 178 fprintf(out, "%10ld %s\n", 179 ru.ru_nswap, "swaps"); 180 fprintf(out, "%10ld %s\n", 181 ru.ru_inblock, "block input operations"); 182 fprintf(out, "%10ld %s\n", 183 ru.ru_oublock, "block output operations"); 184 fprintf(out, "%10ld %s\n", 185 ru.ru_msgsnd, "messages sent"); 186 fprintf(out, "%10ld %s\n", 187 ru.ru_msgrcv, "messages received"); 188 fprintf(out, "%10ld %s\n", 189 ru.ru_nsignals, "signals received"); 190 fprintf(out, "%10ld %s\n", 191 ru.ru_nvcsw, "voluntary context switches"); 192 fprintf(out, "%10ld %s\n", 193 ru.ru_nivcsw, "involuntary context switches"); 194 } 195 /* 196 * If the child has exited on a signal, exit on the same 197 * signal, too, in order to reproduce the child's exit status. 198 * However, avoid actually dumping core from the current process. 199 */ 200 if (exitonsig) { 201 if (signal(exitonsig, SIG_DFL) == SIG_ERR) 202 warn("signal"); 203 else { 204 rl.rlim_max = rl.rlim_cur = 0; 205 if (setrlimit(RLIMIT_CORE, &rl) == -1) 206 warn("setrlimit"); 207 kill(getpid(), exitonsig); 208 } 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 /* 222 * Return the frequency of the kernel's statistics clock. 223 */ 224 static int 225 getstathz(void) 226 { 227 int mib[2]; 228 size_t size; 229 struct clockinfo clockrate; 230 231 mib[0] = CTL_KERN; 232 mib[1] = KERN_CLOCKRATE; 233 size = sizeof clockrate; 234 if (sysctl(mib, 2, &clockrate, &size, NULL, 0) == -1) 235 err(1, "sysctl kern.clockrate"); 236 return clockrate.stathz; 237 } 238 239 static void 240 humantime(FILE *out, long sec, long usec) 241 { 242 long days, hrs, mins; 243 244 days = sec / (60L * 60 * 24); 245 sec %= (60L * 60 * 24); 246 hrs = sec / (60L * 60); 247 sec %= (60L * 60); 248 mins = sec / 60; 249 sec %= 60; 250 251 fprintf(out, "\t"); 252 if (days) 253 fprintf(out, "%ldd", days); 254 if (hrs) 255 fprintf(out, "%ldh", hrs); 256 if (mins) 257 fprintf(out, "%ldm", mins); 258 fprintf(out, "%ld%c%02lds", sec, decimal_point, usec); 259 } 260 261 static void 262 showtime(FILE *out, struct timeval *before, struct timeval *after, 263 struct rusage *ru) 264 { 265 266 after->tv_sec -= before->tv_sec; 267 after->tv_usec -= before->tv_usec; 268 if (after->tv_usec < 0) 269 after->tv_sec--, after->tv_usec += 1000000; 270 271 if (pflag) { 272 /* POSIX wants output that must look like 273 "real %f\nuser %f\nsys %f\n" and requires 274 at least two digits after the radix. */ 275 fprintf(out, "real %jd%c%02ld\n", 276 (intmax_t)after->tv_sec, decimal_point, 277 after->tv_usec/10000); 278 fprintf(out, "user %jd%c%02ld\n", 279 (intmax_t)ru->ru_utime.tv_sec, decimal_point, 280 ru->ru_utime.tv_usec/10000); 281 fprintf(out, "sys %jd%c%02ld\n", 282 (intmax_t)ru->ru_stime.tv_sec, decimal_point, 283 ru->ru_stime.tv_usec/10000); 284 } else if (hflag) { 285 humantime(out, after->tv_sec, after->tv_usec/10000); 286 fprintf(out, " real\t"); 287 humantime(out, ru->ru_utime.tv_sec, ru->ru_utime.tv_usec/10000); 288 fprintf(out, " user\t"); 289 humantime(out, ru->ru_stime.tv_sec, ru->ru_stime.tv_usec/10000); 290 fprintf(out, " sys\n"); 291 } else { 292 fprintf(out, "%9jd%c%02ld real ", 293 (intmax_t)after->tv_sec, decimal_point, 294 after->tv_usec/10000); 295 fprintf(out, "%9jd%c%02ld user ", 296 (intmax_t)ru->ru_utime.tv_sec, decimal_point, 297 ru->ru_utime.tv_usec/10000); 298 fprintf(out, "%9jd%c%02ld sys\n", 299 (intmax_t)ru->ru_stime.tv_sec, decimal_point, 300 ru->ru_stime.tv_usec/10000); 301 } 302 } 303 304 static void 305 siginfo(int sig __unused) 306 { 307 308 siginfo_recvd = 1; 309 } 310