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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1987, 1988, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)time.c 8.1 (Berkeley) 6/6/93"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <sys/types.h> 49 #include <sys/time.h> 50 #include <sys/resource.h> 51 #include <sys/signal.h> 52 #include <sys/sysctl.h> 53 #include <stdlib.h> 54 #include <sys/wait.h> 55 56 #include <err.h> 57 #include <stdio.h> 58 #include <errno.h> 59 #include <string.h> 60 #include <unistd.h> 61 #include <signal.h> 62 63 static int getstathz __P((void)); 64 static void humantime __P((FILE *, long, long)); 65 static void usage __P((void)); 66 67 int 68 main(argc, argv) 69 int argc; 70 char **argv; 71 { 72 register int pid; 73 int aflag, ch, hflag, lflag, status, pflag; 74 struct timeval before, after; 75 struct rusage ru; 76 FILE *out = stderr; 77 char *ofn = NULL; 78 int exitonsig = 0; /* Die with same signal as child */ 79 80 aflag = hflag = lflag = pflag = 0; 81 while ((ch = getopt(argc, argv, "ahlo:p")) != -1) 82 switch((char)ch) { 83 case 'a': 84 aflag = 1; 85 break; 86 case 'h': 87 hflag = 1; 88 break; 89 case 'l': 90 lflag = 1; 91 break; 92 case 'o': 93 ofn = optarg; 94 break; 95 case 'p': 96 pflag = 1; 97 break; 98 case '?': 99 default: 100 usage(); 101 } 102 103 if (!(argc -= optind)) 104 exit(0); 105 argv += optind; 106 107 if (ofn) { 108 if ((out = fopen(ofn, aflag ? "a" : "w")) == NULL) 109 err(1, "%s", ofn); 110 setvbuf(out, (char *)NULL, _IONBF, (size_t)0); 111 } 112 113 gettimeofday(&before, (struct timezone *)NULL); 114 switch(pid = fork()) { 115 case -1: /* error */ 116 err(1, "time"); 117 /* NOTREACHED */ 118 case 0: /* child */ 119 errno = 0; 120 execvp(*argv, argv); 121 warn("%s", *argv); 122 if (errno == ENOENT) 123 _exit(127); /* POSIX: utility could not be found */ 124 else 125 _exit(126); /* POSIX: utility could not be invoked */ 126 /* NOTREACHED */ 127 } 128 /* parent */ 129 (void)signal(SIGINT, SIG_IGN); 130 (void)signal(SIGQUIT, SIG_IGN); 131 while (wait3(&status, 0, &ru) != pid); /* XXX use waitpid */ 132 gettimeofday(&after, (struct timezone *)NULL); 133 if ( ! WIFEXITED(status)) 134 warnx("command terminated abnormally"); 135 if (WIFSIGNALED(status)) 136 exitonsig = WTERMSIG(status); 137 after.tv_sec -= before.tv_sec; 138 after.tv_usec -= before.tv_usec; 139 if (after.tv_usec < 0) 140 after.tv_sec--, after.tv_usec += 1000000; 141 if (pflag) { 142 /* POSIX wants output that must look like 143 "real %f\nuser %f\nsys %f\n" and requires 144 at least two digits after the radix. */ 145 fprintf(out, "real %ld.%02ld\n", 146 after.tv_sec, after.tv_usec/10000); 147 fprintf(out, "user %ld.%02ld\n", 148 ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000); 149 fprintf(out, "sys %ld.%02ld\n", 150 ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000); 151 } else if (hflag) { 152 humantime(out, after.tv_sec, after.tv_usec/10000); 153 fprintf(out, " real\t"); 154 humantime(out, ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000); 155 fprintf(out, " user\t"); 156 humantime(out, ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000); 157 fprintf(out, " sys\n"); 158 } else { 159 fprintf(out, "%9ld.%02ld real ", 160 after.tv_sec, after.tv_usec/10000); 161 fprintf(out, "%9ld.%02ld user ", 162 ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000); 163 fprintf(out, "%9ld.%02ld sys\n", 164 ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000); 165 } 166 if (lflag) { 167 int hz = getstathz(); 168 u_long ticks; 169 170 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 171 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 172 173 /* 174 * If our round-off on the tick calculation still puts us at 0, 175 * then always assume at least one tick. 176 */ 177 if (ticks == 0) 178 ticks = 1; 179 180 fprintf(out, "%10ld %s\n", 181 ru.ru_maxrss, "maximum resident set size"); 182 fprintf(out, "%10ld %s\n", 183 ru.ru_ixrss / ticks, "average shared memory size"); 184 fprintf(out, "%10ld %s\n", 185 ru.ru_idrss / ticks, "average unshared data size"); 186 fprintf(out, "%10ld %s\n", 187 ru.ru_isrss / ticks, "average unshared stack size"); 188 fprintf(out, "%10ld %s\n", 189 ru.ru_minflt, "page reclaims"); 190 fprintf(out, "%10ld %s\n", 191 ru.ru_majflt, "page faults"); 192 fprintf(out, "%10ld %s\n", 193 ru.ru_nswap, "swaps"); 194 fprintf(out, "%10ld %s\n", 195 ru.ru_inblock, "block input operations"); 196 fprintf(out, "%10ld %s\n", 197 ru.ru_oublock, "block output operations"); 198 fprintf(out, "%10ld %s\n", 199 ru.ru_msgsnd, "messages sent"); 200 fprintf(out, "%10ld %s\n", 201 ru.ru_msgrcv, "messages received"); 202 fprintf(out, "%10ld %s\n", 203 ru.ru_nsignals, "signals received"); 204 fprintf(out, "%10ld %s\n", 205 ru.ru_nvcsw, "voluntary context switches"); 206 fprintf(out, "%10ld %s\n", 207 ru.ru_nivcsw, "involuntary context switches"); 208 } 209 if (exitonsig) { 210 if (signal(exitonsig, SIG_DFL) < 0) 211 perror("signal"); 212 else 213 kill(getpid(), exitonsig); 214 } 215 exit (WIFEXITED(status) ? WEXITSTATUS(status) : EXIT_FAILURE); 216 } 217 218 static void 219 usage() 220 { 221 fprintf(stderr, "usage: time [-al] [-h|-p] [-o file] command\n"); 222 exit(1); 223 } 224 225 /* 226 * Return the frequency of the kernel's statistics clock. 227 */ 228 static int 229 getstathz() 230 { 231 struct clockinfo clockrate; 232 int mib[2]; 233 size_t size; 234 235 mib[0] = CTL_KERN; 236 mib[1] = KERN_CLOCKRATE; 237 size = sizeof clockrate; 238 if (sysctl(mib, 2, &clockrate, &size, NULL, 0) == -1) 239 err(1, "sysctl kern.clockrate"); 240 return clockrate.stathz; 241 } 242 243 static void 244 humantime(out, sec, usec) 245 FILE *out; 246 long sec; 247 long usec; 248 { 249 long days, hrs, mins; 250 251 days = sec / (60L * 60 * 24); 252 sec %= (60L * 60 * 24); 253 hrs = sec / (60L * 60); 254 sec %= (60L * 60); 255 mins = sec / 60; 256 sec %= 60; 257 258 fprintf(out, "\t"); 259 if (days) 260 fprintf(out, "%ldd", days); 261 if (hrs) 262 fprintf(out, "%ldh", hrs); 263 if (mins) 264 fprintf(out, "%ldm", mins); 265 fprintf(out, "%ld.%02lds", sec, usec); 266 } 267