time.c revision 1.4
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 1.4 1993/08/27 22:30:47 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 <stdlib.h> 52 #include <unistd.h> 53 #include <errno.h> 54 55 int lflag; 56 int portableflag; 57 58 int 59 main(argc, argv) 60 int argc; 61 char **argv; 62 { 63 extern int optind; 64 register int pid; 65 int ch, status; 66 struct timeval before, after; 67 struct rusage ru; 68 69 lflag = 0; 70 while ((ch = getopt(argc, argv, "lp")) != EOF) 71 switch((char)ch) { 72 case 'p': 73 portableflag = 1; 74 break; 75 case 'l': 76 lflag = 1; 77 break; 78 case '?': 79 default: 80 fprintf(stderr, "usage: time [-lp] command.\n"); 81 exit(1); 82 } 83 84 if (!(argc -= optind)) 85 exit(0); 86 argv += optind; 87 88 gettimeofday(&before, (struct timezone *)NULL); 89 switch(pid = vfork()) { 90 case -1: /* error */ 91 perror("time"); 92 exit(1); 93 /* NOTREACHED */ 94 case 0: /* child */ 95 execvp(*argv, argv); 96 perror(*argv); 97 _exit((errno == ENOENT) ? 127 : 126); 98 /* NOTREACHED */ 99 } 100 101 /* parent */ 102 (void)signal(SIGINT, SIG_IGN); 103 (void)signal(SIGQUIT, SIG_IGN); 104 while (wait3(&status, 0, &ru) != pid); 105 gettimeofday(&after, (struct timezone *)NULL); 106 if (!WIFEXITED(status)) 107 fprintf(stderr, "Command terminated abnormally.\n"); 108 after.tv_sec -= before.tv_sec; 109 after.tv_usec -= before.tv_usec; 110 if (after.tv_usec < 0) 111 after.tv_sec--, after.tv_usec += 1000000; 112 113 if (portableflag) { 114 fprintf (stderr, "real %9ld.%02ld\n", 115 after.tv_sec, after.tv_usec/10000); 116 fprintf (stderr, "user %9ld.%02ld\n", 117 ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000); 118 fprintf (stderr, "sys %9ld.%02ld\n", 119 ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000); 120 } else { 121 122 fprintf(stderr, "%9ld.%02ld real ", 123 after.tv_sec, after.tv_usec/10000); 124 fprintf(stderr, "%9ld.%02ld user ", 125 ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000); 126 fprintf(stderr, "%9ld.%02ld sys\n", 127 ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000); 128 } 129 130 if (lflag) { 131 int hz = 100; /* XXX */ 132 long ticks; 133 134 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 135 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 136 137 fprintf(stderr, "%10ld %s\n", 138 ru.ru_maxrss, "maximum resident set size"); 139 fprintf(stderr, "%10ld %s\n", ticks ? ru.ru_ixrss / ticks : 0, 140 "average shared memory size"); 141 fprintf(stderr, "%10ld %s\n", ticks ? ru.ru_idrss / ticks : 0, 142 "average unshared data size"); 143 fprintf(stderr, "%10ld %s\n", ticks ? ru.ru_isrss / ticks : 0, 144 "average unshared stack size"); 145 fprintf(stderr, "%10ld %s\n", 146 ru.ru_minflt, "page reclaims"); 147 fprintf(stderr, "%10ld %s\n", 148 ru.ru_majflt, "page faults"); 149 fprintf(stderr, "%10ld %s\n", 150 ru.ru_nswap, "swaps"); 151 fprintf(stderr, "%10ld %s\n", 152 ru.ru_inblock, "block input operations"); 153 fprintf(stderr, "%10ld %s\n", 154 ru.ru_oublock, "block output operations"); 155 fprintf(stderr, "%10ld %s\n", 156 ru.ru_msgsnd, "messages sent"); 157 fprintf(stderr, "%10ld %s\n", 158 ru.ru_msgrcv, "messages received"); 159 fprintf(stderr, "%10ld %s\n", 160 ru.ru_nsignals, "signals received"); 161 fprintf(stderr, "%10ld %s\n", 162 ru.ru_nvcsw, "voluntary context switches"); 163 fprintf(stderr, "%10ld %s\n", 164 ru.ru_nivcsw, "involuntary context switches"); 165 } 166 167 exit (WEXITSTATUS(status)); 168 } 169
Indexes created Thu Sep 25 08:09:54 GMT 2025