time.c revision 11873
183553Smurray/* 283553Smurray * Copyright (c) 1987, 1988, 1993 383553Smurray * The Regents of the University of California. All rights reserved. 483553Smurray * 583553Smurray * Redistribution and use in source and binary forms, with or without 683553Smurray * modification, are permitted provided that the following conditions 783553Smurray * are met: 883553Smurray * 1. Redistributions of source code must retain the above copyright 983553Smurray * notice, this list of conditions and the following disclaimer. 1083553Smurray * 2. Redistributions in binary form must reproduce the above copyright 1183553Smurray * notice, this list of conditions and the following disclaimer in the 1283553Smurray * documentation and/or other materials provided with the distribution. 1383553Smurray * 3. All advertising materials mentioning features or use of this software 1483553Smurray * must display the following acknowledgement: 1583553Smurray * This product includes software developed by the University of 1683553Smurray * California, Berkeley and its contributors. 1783553Smurray * 4. Neither the name of the University nor the names of its contributors 1883553Smurray * may be used to endorse or promote products derived from this software 1983553Smurray * without specific prior written permission. 2083553Smurray * 2183553Smurray * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2283553Smurray * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2383553Smurray * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2483553Smurray * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2583553Smurray * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2683553Smurray * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2783553Smurray * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28153942Sbrueffer * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29203692Sgavin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3083553Smurray * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3183553Smurray * SUCH DAMAGE. 3283553Smurray */ 33153942Sbrueffer 3483553Smurray#ifndef lint 3583553Smurraystatic char copyright[] = 3683553Smurray"@(#) Copyright (c) 1987, 1988, 1993\n\ 3783553Smurray The Regents of the University of California. All rights reserved.\n"; 3883553Smurray#endif /* not lint */ 39153942Sbrueffer 40153942Sbrueffer#ifndef lint 41153942Sbruefferstatic char sccsid[] = "@(#)time.c 8.1 (Berkeley) 6/6/93"; 42153942Sbrueffer#endif /* not lint */ 43153942Sbrueffer 44153942Sbrueffer#include <sys/types.h> 4583553Smurray#include <sys/time.h> 4683553Smurray#include <sys/resource.h> 4783553Smurray#include <sys/signal.h> 4883553Smurray#include <stdio.h> 4983553Smurray 5083553Smurraymain(argc, argv) 5183553Smurray int argc; 5283553Smurray char **argv; 53153942Sbrueffer{ 54306114Savg extern int optind; 5583553Smurray register int pid; 5683553Smurray int ch, status, lflag; 5783553Smurray struct timeval before, after; 5883553Smurray struct rusage ru; 5983553Smurray 6083553Smurray lflag = 0; 6192137Smurray while ((ch = getopt(argc, argv, "l")) != EOF) 6283553Smurray switch((char)ch) { 63131530Sru case 'l': 64131530Sru lflag = 1; 65131530Sru break; 6685405Sru case '?': 6785405Sru default: 6883553Smurray fprintf(stderr, "usage: time [-l] command.\n"); 6983553Smurray exit(1); 7083553Smurray } 71267938Sbapt 7283553Smurray if (!(argc -= optind)) 7383553Smurray exit(0); 74 argv += optind; 75 76 gettimeofday(&before, (struct timezone *)NULL); 77 switch(pid = vfork()) { 78 case -1: /* error */ 79 perror("time"); 80 exit(1); 81 /* NOTREACHED */ 82 case 0: /* child */ 83 execvp(*argv, argv); 84 perror(*argv); 85 _exit(1); 86 /* NOTREACHED */ 87 } 88 /* parent */ 89 (void)signal(SIGINT, SIG_IGN); 90 (void)signal(SIGQUIT, SIG_IGN); 91 while (wait3(&status, 0, &ru) != pid); /* XXX use waitpid */ 92 gettimeofday(&after, (struct timezone *)NULL); 93 if (status&0377) 94 fprintf(stderr, "Command terminated abnormally.\n"); 95 after.tv_sec -= before.tv_sec; 96 after.tv_usec -= before.tv_usec; 97 if (after.tv_usec < 0) 98 after.tv_sec--, after.tv_usec += 1000000; 99 fprintf(stderr, "%9ld.%02ld real ", after.tv_sec, after.tv_usec/10000); 100 fprintf(stderr, "%9ld.%02ld user ", 101 ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000); 102 fprintf(stderr, "%9ld.%02ld sys\n", 103 ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000); 104 if (lflag) { 105 int hz = 100; /* XXX */ 106 u_long ticks; 107 108 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 109 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 110 111 /* 112 * If our round-off on the tick calculation still puts us at 0, 113 * then always assume at least one tick. 114 */ 115 if (ticks == 0) 116 ticks = 1; 117 118 fprintf(stderr, "%10ld %s\n", 119 ru.ru_maxrss, "maximum resident set size"); 120 fprintf(stderr, "%10ld %s\n", 121 ru.ru_ixrss / ticks, "average shared memory size"); 122 fprintf(stderr, "%10ld %s\n", 123 ru.ru_idrss / ticks, "average unshared data size"); 124 fprintf(stderr, "%10ld %s\n", 125 ru.ru_isrss / ticks, "average unshared stack size"); 126 fprintf(stderr, "%10ld %s\n", 127 ru.ru_minflt, "page reclaims"); 128 fprintf(stderr, "%10ld %s\n", 129 ru.ru_majflt, "page faults"); 130 fprintf(stderr, "%10ld %s\n", 131 ru.ru_nswap, "swaps"); 132 fprintf(stderr, "%10ld %s\n", 133 ru.ru_inblock, "block input operations"); 134 fprintf(stderr, "%10ld %s\n", 135 ru.ru_oublock, "block output operations"); 136 fprintf(stderr, "%10ld %s\n", 137 ru.ru_msgsnd, "messages sent"); 138 fprintf(stderr, "%10ld %s\n", 139 ru.ru_msgrcv, "messages received"); 140 fprintf(stderr, "%10ld %s\n", 141 ru.ru_nsignals, "signals received"); 142 fprintf(stderr, "%10ld %s\n", 143 ru.ru_nvcsw, "voluntary context switches"); 144 fprintf(stderr, "%10ld %s\n", 145 ru.ru_nivcsw, "involuntary context switches"); 146 } 147 exit (status>>8); 148} 149