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 #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 <time.h> 60 #include <unistd.h> 61 62 static int getstathz(void); 63 static void humantime(FILE *, long, long); 64 static void showtime(FILE *, struct timespec *, struct timespec *, 65 struct rusage *); 66 static void siginfo(int); 67 static void usage(void) __dead2; 68 69 static sig_atomic_t siginfo_recvd; 70 static char decimal_point; 71 static struct timespec before_ts; 72 static int hflag, pflag; 73 74 int 75 main(int argc, char **argv) 76 { 77 int aflag, ch, lflag, status; 78 int exitonsig; 79 pid_t pid; 80 struct rlimit rl; 81 struct rusage ru; 82 struct timespec after; 83 char *ofn = NULL; 84 FILE *out = stderr; 85 86 (void) setlocale(LC_NUMERIC, ""); 87 decimal_point = localeconv()->decimal_point[0]; 88 89 aflag = hflag = lflag = pflag = 0; 90 while ((ch = getopt(argc, argv, "ahlo:p")) != -1) 91 switch((char)ch) { 92 case 'a': 93 aflag = 1; 94 break; 95 case 'h': 96 hflag = 1; 97 break; 98 case 'l': 99 lflag = 1; 100 break; 101 case 'o': 102 ofn = optarg; 103 break; 104 case 'p': 105 pflag = 1; 106 break; 107 case '?': 108 default: 109 usage(); 110 } 111 112 if (!(argc -= optind)) 113 exit(0); 114 argv += optind; 115 116 if (ofn) { 117 if ((out = fopen(ofn, aflag ? "ae" : "we")) == NULL) 118 err(1, "%s", ofn); 119 setvbuf(out, (char *)NULL, _IONBF, (size_t)0); 120 } 121 122 if (clock_gettime(CLOCK_MONOTONIC, &before_ts)) 123 err(1, "clock_gettime"); 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 if (clock_gettime(CLOCK_MONOTONIC, &after)) 143 err(1, "clock_gettime"); 144 getrusage(RUSAGE_CHILDREN, &ru); 145 showtime(stdout, &before_ts, &after, &ru); 146 } 147 } 148 if (clock_gettime(CLOCK_MONOTONIC, &after)) 149 err(1, "clock_gettime"); 150 if ( ! WIFEXITED(status)) 151 warnx("command terminated abnormally"); 152 exitonsig = WIFSIGNALED(status) ? WTERMSIG(status) : 0; 153 showtime(out, &before_ts, &after, &ru); 154 if (lflag) { 155 int hz = getstathz(); 156 u_long ticks; 157 158 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 /* 198 * If the child has exited on a signal, exit on the same 199 * signal, too, in order to reproduce the child's exit status. 200 * However, avoid actually dumping core from the current process. 201 */ 202 if (exitonsig) { 203 if (signal(exitonsig, SIG_DFL) == SIG_ERR) 204 warn("signal"); 205 else { 206 rl.rlim_max = rl.rlim_cur = 0; 207 if (setrlimit(RLIMIT_CORE, &rl) == -1) 208 warn("setrlimit"); 209 kill(getpid(), exitonsig); 210 } 211 } 212 exit (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE); 213 } 214 215 static void 216 usage(void) 217 { 218 fprintf(stderr, 219 "usage: time [-al] [-h | -p] [-o file] utility [argument ...]\n"); 220 exit(1); 221 } 222 223 /* 224 * Return the frequency of the kernel's statistics clock. 225 */ 226 static int 227 getstathz(void) 228 { 229 int mib[2]; 230 size_t size; 231 struct clockinfo clockrate; 232 233 mib[0] = CTL_KERN; 234 mib[1] = KERN_CLOCKRATE; 235 size = sizeof clockrate; 236 if (sysctl(mib, 2, &clockrate, &size, NULL, 0) == -1) 237 err(1, "sysctl kern.clockrate"); 238 return clockrate.stathz; 239 } 240 241 static void 242 humantime(FILE *out, long sec, long centisec) 243 { 244 long days, hrs, mins; 245 246 days = sec / (60L * 60 * 24); 247 sec %= (60L * 60 * 24); 248 hrs = sec / (60L * 60); 249 sec %= (60L * 60); 250 mins = sec / 60; 251 sec %= 60; 252 253 fprintf(out, "\t"); 254 if (days) 255 fprintf(out, "%ldd", days); 256 if (hrs) 257 fprintf(out, "%ldh", hrs); 258 if (mins) 259 fprintf(out, "%ldm", mins); 260 fprintf(out, "%ld%c%02lds", sec, decimal_point, centisec); 261 } 262 263 static void 264 showtime(FILE *out, struct timespec *before, struct timespec *after, 265 struct rusage *ru) 266 { 267 268 after->tv_sec -= before->tv_sec; 269 after->tv_nsec -= before->tv_nsec; 270 if (after->tv_nsec < 0) 271 after->tv_sec--, after->tv_nsec += 1000000000; 272 273 if (pflag) { 274 /* POSIX wants output that must look like 275 "real %f\nuser %f\nsys %f\n" and requires 276 at least two digits after the radix. */ 277 fprintf(out, "real %jd%c%02ld\n", 278 (intmax_t)after->tv_sec, decimal_point, 279 after->tv_nsec/10000000); 280 fprintf(out, "user %jd%c%02ld\n", 281 (intmax_t)ru->ru_utime.tv_sec, decimal_point, 282 ru->ru_utime.tv_usec/10000); 283 fprintf(out, "sys %jd%c%02ld\n", 284 (intmax_t)ru->ru_stime.tv_sec, decimal_point, 285 ru->ru_stime.tv_usec/10000); 286 } else if (hflag) { 287 humantime(out, after->tv_sec, after->tv_nsec/10000000); 288 fprintf(out, " real\t"); 289 humantime(out, ru->ru_utime.tv_sec, ru->ru_utime.tv_usec/10000); 290 fprintf(out, " user\t"); 291 humantime(out, ru->ru_stime.tv_sec, ru->ru_stime.tv_usec/10000); 292 fprintf(out, " sys\n"); 293 } else { 294 fprintf(out, "%9jd%c%02ld real ", 295 (intmax_t)after->tv_sec, decimal_point, 296 after->tv_nsec/10000000); 297 fprintf(out, "%9jd%c%02ld user ", 298 (intmax_t)ru->ru_utime.tv_sec, decimal_point, 299 ru->ru_utime.tv_usec/10000); 300 fprintf(out, "%9jd%c%02ld sys\n", 301 (intmax_t)ru->ru_stime.tv_sec, decimal_point, 302 ru->ru_stime.tv_usec/10000); 303 } 304 } 305 306 static void 307 siginfo(int sig __unused) 308 { 309 310 siginfo_recvd = 1; 311 } 312