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 * $DragonFly: src/usr.bin/time/time.c,v 1.11 2005/03/04 16:54:37 liamfoy Exp $ 33 */ 34 35 #include <sys/user.h> 36 #include <sys/time.h> 37 #include <sys/resource.h> 38 #include <sys/signal.h> 39 #include <sys/sysctl.h> 40 #include <sys/wait.h> 41 42 #include <err.h> 43 #include <errno.h> 44 #include <kinfo.h> 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 <unistd.h> 52 53 static void humantime(FILE *, long, long); 54 static void showtime(FILE *, struct timespec *, struct timespec *, 55 struct rusage *); 56 static void siginfo(int); 57 58 static void usage(void); 59 60 static sig_atomic_t siginfo_recvd; 61 static char decimal_point; 62 struct timespec before_ts; 63 static int hflag, pflag; 64 65 int 66 main(int argc, char **argv) 67 { 68 pid_t pid; 69 int aflag, ch, lflag, status; 70 int exit_on_sig; 71 struct timespec after; 72 struct rusage ru; 73 FILE *out = stderr; 74 const char *ofn = NULL; 75 76 setlocale(LC_NUMERIC, ""); 77 decimal_point = localeconv()->decimal_point[0]; 78 79 aflag = hflag = lflag = pflag = 0; 80 while ((ch = getopt(argc, argv, "ahlo:p")) != -1) 81 switch (ch) { 82 case 'a': 83 aflag = 1; 84 break; 85 case 'h': 86 hflag = 1; 87 break; 88 case 'l': 89 lflag = 1; 90 break; 91 case 'o': 92 ofn = optarg; 93 break; 94 case 'p': 95 pflag = 1; 96 break; 97 default: 98 usage(); 99 } 100 101 if (!(argc -= optind)) 102 exit(0); 103 argv += optind; 104 105 if (ofn) { 106 if ((out = fopen(ofn, aflag ? "ae" : "we")) == NULL) 107 err(1, "%s", ofn); 108 setvbuf(out, NULL, _IONBF, (size_t)0); 109 } 110 111 if (clock_gettime(CLOCK_MONOTONIC, &before_ts) == -1) 112 err(1, "clock_gettime failed"); 113 switch (pid = fork()) { 114 case -1: /* error */ 115 err(1, "could not fork"); 116 /* NOTREACHED */ 117 case 0: /* child */ 118 execvp(*argv, argv); 119 err(errno == ENOENT ? 127 : 126, "%s", *argv); 120 /* NOTREACHED */ 121 } 122 /* parent */ 123 if (signal(SIGINT, SIG_IGN) == SIG_ERR) 124 err(1, "signal failed"); 125 if (signal(SIGQUIT, SIG_IGN) == SIG_ERR) 126 err(1, "signal failed"); 127 siginfo_recvd = 0; 128 if (signal(SIGINFO, siginfo) == SIG_ERR) 129 err(1, "signal failed"); 130 siginterrupt(SIGINFO,1 ); 131 while (wait4(pid, &status, 0, &ru) != pid){ 132 if (siginfo_recvd) { 133 siginfo_recvd = 0; 134 if (clock_gettime(CLOCK_MONOTONIC, &after) == -1) 135 err(1, "clock_gettime failed"); 136 getrusage(RUSAGE_CHILDREN, &ru); 137 showtime(stdout, &before_ts, &after, &ru); 138 } 139 } 140 if (clock_gettime(CLOCK_MONOTONIC, &after) == -1) 141 err(1, "clock_gettime failed"); 142 if (!WIFEXITED(status)) 143 warnx("command terminated abnormally"); 144 exit_on_sig = WIFSIGNALED(status) ? WTERMSIG(status) : 0; 145 showtime(out, &before_ts, &after, &ru); 146 if (lflag) { 147 int hz; 148 u_long ticks; 149 150 if (kinfo_get_sched_stathz(&hz)) 151 err(1, "kinfo_get_sched_stathz"); 152 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 153 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 154 155 /* 156 * If our round-off on the tick calculation still puts us at 0, 157 * then always assume at least one tick. 158 */ 159 if (ticks == 0) 160 ticks = 1; 161 162 fprintf(out, "%10ld %s\n", 163 ru.ru_maxrss, "maximum resident set size"); 164 fprintf(out, "%10ld %s\n", 165 ru.ru_ixrss / ticks, "average shared memory size"); 166 fprintf(out, "%10ld %s\n", 167 ru.ru_idrss / ticks, "average unshared data size"); 168 fprintf(out, "%10ld %s\n", 169 ru.ru_isrss / ticks, "average unshared stack size"); 170 fprintf(out, "%10ld %s\n", 171 ru.ru_minflt, "page reclaims"); 172 fprintf(out, "%10ld %s\n", 173 ru.ru_majflt, "page faults"); 174 fprintf(out, "%10ld %s\n", 175 ru.ru_nswap, "swaps"); 176 fprintf(out, "%10ld %s\n", 177 ru.ru_inblock, "block input operations"); 178 fprintf(out, "%10ld %s\n", 179 ru.ru_oublock, "block output operations"); 180 fprintf(out, "%10ld %s\n", 181 ru.ru_msgsnd, "messages sent"); 182 fprintf(out, "%10ld %s\n", 183 ru.ru_msgrcv, "messages received"); 184 fprintf(out, "%10ld %s\n", 185 ru.ru_nsignals, "signals received"); 186 fprintf(out, "%10ld %s\n", 187 ru.ru_nvcsw, "voluntary context switches"); 188 fprintf(out, "%10ld %s\n", 189 ru.ru_nivcsw, "involuntary context switches"); 190 } 191 /* 192 * If the child has exited on a signal, exit on the same 193 * signal, too, in order to reproduce the child's exit 194 * status. However, avoid actually dumping core from 195 * current process. 196 */ 197 if (exit_on_sig) { 198 if (signal(exit_on_sig, SIG_DFL) == SIG_ERR) 199 warn("signal failed"); 200 else 201 kill(getpid(), exit_on_sig); 202 } 203 exit(WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE); 204 } 205 206 static void 207 usage(void) 208 { 209 fprintf(stderr, 210 "usage: time [-al] [-h|-p] [-o file] utility [argument ...]\n"); 211 exit(1); 212 } 213 214 static void 215 humantime(FILE *out, long sec, long usec) 216 { 217 long days, hrs, mins; 218 219 days = sec / (60L * 60 * 24); 220 sec %= (60L * 60 * 24); 221 hrs = sec / (60L * 60); 222 sec %= (60L * 60); 223 mins = sec / 60; 224 sec %= 60; 225 226 fprintf(out, "\t"); 227 if (days) 228 fprintf(out, "%ldd", days); 229 if (hrs) 230 fprintf(out, "%ldh", hrs); 231 if (mins) 232 fprintf(out, "%ldm", mins); 233 fprintf(out, "%ld%c%02lds", sec, decimal_point, usec); 234 } 235 236 static void 237 showtime(FILE *out, struct timespec *before, struct timespec *after, 238 struct rusage *ru) 239 { 240 241 after->tv_sec -= before->tv_sec; 242 after->tv_nsec -= before->tv_nsec; 243 if (after->tv_nsec < 0) 244 after->tv_sec--, after->tv_nsec += 1000000000L; 245 246 if (pflag) { 247 /* POSIX wants output that must look like 248 "real %f\nuser %f\nsys %f\n" and requires 249 at least two digits after the radix. */ 250 fprintf(out, "real %jd%c%02ld\n", 251 (intmax_t)after->tv_sec, decimal_point, 252 after->tv_nsec/10000000L); 253 fprintf(out, "user %jd%c%02ld\n", 254 (intmax_t)ru->ru_utime.tv_sec, decimal_point, 255 ru->ru_utime.tv_usec/10000); 256 fprintf(out, "sys %jd%c%02ld\n", 257 (intmax_t)ru->ru_stime.tv_sec, decimal_point, 258 ru->ru_stime.tv_usec/10000); 259 } else if (hflag) { 260 humantime(out, after->tv_sec, after->tv_nsec/10000000); 261 fprintf(out, " real\t"); 262 humantime(out, ru->ru_utime.tv_sec, ru->ru_utime.tv_usec/10000); 263 fprintf(out, " user\t"); 264 humantime(out, ru->ru_stime.tv_sec, ru->ru_stime.tv_usec/10000); 265 fprintf(out, " sys\n"); 266 } else { 267 fprintf(out, "%9jd%c%02ld real ", 268 (intmax_t)after->tv_sec, decimal_point, 269 after->tv_nsec/10000000); 270 fprintf(out, "%9jd%c%02ld user ", 271 (intmax_t)ru->ru_utime.tv_sec, decimal_point, 272 ru->ru_utime.tv_usec/10000); 273 fprintf(out, "%9jd%c%02ld sys\n", 274 (intmax_t)ru->ru_stime.tv_sec, decimal_point, 275 ru->ru_stime.tv_usec/10000); 276 } 277 } 278 279 static void 280 siginfo(int sig __unused) 281 { 282 siginfo_recvd = 1; 283 } 284