time.c revision 1.3
1 /* 2 * Copyright (c) 1987, 1988 The Regents of the University of California. 3 * 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 char copyright[] = 36 "@(#) Copyright (c) 1987, 1988 The Regents of the University of California.\n\ 37 All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 /*static char sccsid[] = "from: @(#)time.c 4.9 (Berkeley) 6/1/90";*/ 42 static char rcsid[] = "$Id: time.c,v 1.3 1993/08/27 19:05:31 jtc Exp $"; 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 #include <sys/time.h> 47 #include <sys/resource.h> 48 #include <sys/signal.h> 49 #include <sys/wait.h> 50 #include <stdio.h> 51 #include <errno.h> 52 53 int lflag; 54 int portableflag; 55 56 main(argc, argv) 57 int argc; 58 char **argv; 59 { 60 extern int optind; 61 register int pid; 62 int ch, status; 63 struct timeval before, after; 64 struct rusage ru; 65 66 lflag = 0; 67 while ((ch = getopt(argc, argv, "lp")) != EOF) 68 switch((char)ch) { 69 case 'p': 70 portableflag = 1; 71 break; 72 case 'l': 73 lflag = 1; 74 break; 75 case '?': 76 default: 77 fprintf(stderr, "usage: time [-lp] command.\n"); 78 exit(1); 79 } 80 81 if (!(argc -= optind)) 82 exit(0); 83 argv += optind; 84 85 gettimeofday(&before, (struct timezone *)NULL); 86 switch(pid = vfork()) { 87 case -1: /* error */ 88 perror("time"); 89 exit(1); 90 /* NOTREACHED */ 91 case 0: /* child */ 92 execvp(*argv, argv); 93 perror(*argv); 94 _exit((errno == ENOENT) ? 127 : 126); 95 /* NOTREACHED */ 96 } 97 98 /* parent */ 99 (void)signal(SIGINT, SIG_IGN); 100 (void)signal(SIGQUIT, SIG_IGN); 101 while (wait3(&status, 0, &ru) != pid); 102 gettimeofday(&after, (struct timezone *)NULL); 103 if (!WIFEXITED(status)) 104 fprintf(stderr, "Command terminated abnormally.\n"); 105 after.tv_sec -= before.tv_sec; 106 after.tv_usec -= before.tv_usec; 107 if (after.tv_usec < 0) 108 after.tv_sec--, after.tv_usec += 1000000; 109 110 if (portableflag) { 111 fprintf (stderr, "real %9ld.%02ld\n", 112 after.tv_sec, after.tv_usec/10000); 113 fprintf (stderr, "user %9ld.%02ld\n", 114 ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000); 115 fprintf (stderr, "sys %9ld.%02ld\n", 116 ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000); 117 } else { 118 119 fprintf(stderr, "%9ld.%02ld real ", 120 after.tv_sec, after.tv_usec/10000); 121 fprintf(stderr, "%9ld.%02ld user ", 122 ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000); 123 fprintf(stderr, "%9ld.%02ld sys\n", 124 ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000); 125 } 126 127 if (lflag) { 128 int hz = 100; /* XXX */ 129 long ticks; 130 131 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 132 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 133 134 fprintf(stderr, "%10ld %s\n", 135 ru.ru_maxrss, "maximum resident set size"); 136 fprintf(stderr, "%10ld %s\n", ticks ? ru.ru_ixrss / ticks : 0, 137 "average shared memory size"); 138 fprintf(stderr, "%10ld %s\n", ticks ? ru.ru_idrss / ticks : 0, 139 "average unshared data size"); 140 fprintf(stderr, "%10ld %s\n", ticks ? ru.ru_isrss / ticks : 0, 141 "average unshared stack size"); 142 fprintf(stderr, "%10ld %s\n", 143 ru.ru_minflt, "page reclaims"); 144 fprintf(stderr, "%10ld %s\n", 145 ru.ru_majflt, "page faults"); 146 fprintf(stderr, "%10ld %s\n", 147 ru.ru_nswap, "swaps"); 148 fprintf(stderr, "%10ld %s\n", 149 ru.ru_inblock, "block input operations"); 150 fprintf(stderr, "%10ld %s\n", 151 ru.ru_oublock, "block output operations"); 152 fprintf(stderr, "%10ld %s\n", 153 ru.ru_msgsnd, "messages sent"); 154 fprintf(stderr, "%10ld %s\n", 155 ru.ru_msgrcv, "messages received"); 156 fprintf(stderr, "%10ld %s\n", 157 ru.ru_nsignals, "signals received"); 158 fprintf(stderr, "%10ld %s\n", 159 ru.ru_nvcsw, "voluntary context switches"); 160 fprintf(stderr, "%10ld %s\n", 161 ru.ru_nivcsw, "involuntary context switches"); 162 } 163 164 exit (WEXITSTATUS(status)); 165 } 166
Indexes created Wed Sep 24 05:09:52 GMT 2025