1 /* 2 * Copyright (c) 1987, 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char copyright[] = 10 "@(#) Copyright (c) 1987, 1988, 1993\n\ 11 The Regents of the University of California. All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)time.c 8.1 (Berkeley) 06/06/93"; 16 #endif /* not lint */ 17 18 #include <sys/types.h> 19 #include <sys/time.h> 20 #include <sys/resource.h> 21 #include <sys/signal.h> 22 #include <stdio.h> 23 24 main(argc, argv) 25 int argc; 26 char **argv; 27 { 28 extern int optind; 29 register int pid; 30 int ch, status, lflag; 31 struct timeval before, after; 32 struct rusage ru; 33 34 lflag = 0; 35 while ((ch = getopt(argc, argv, "l")) != EOF) 36 switch((char)ch) { 37 case 'l': 38 lflag = 1; 39 break; 40 case '?': 41 default: 42 fprintf(stderr, "usage: time [-l] command.\n"); 43 exit(1); 44 } 45 46 if (!(argc -= optind)) 47 exit(0); 48 argv += optind; 49 50 gettimeofday(&before, (struct timezone *)NULL); 51 switch(pid = vfork()) { 52 case -1: /* error */ 53 perror("time"); 54 exit(1); 55 /* NOTREACHED */ 56 case 0: /* child */ 57 execvp(*argv, argv); 58 perror(*argv); 59 _exit(1); 60 /* NOTREACHED */ 61 } 62 /* parent */ 63 (void)signal(SIGINT, SIG_IGN); 64 (void)signal(SIGQUIT, SIG_IGN); 65 while (wait3(&status, 0, &ru) != pid); /* XXX use waitpid */ 66 gettimeofday(&after, (struct timezone *)NULL); 67 if (status&0377) 68 fprintf(stderr, "Command terminated abnormally.\n"); 69 after.tv_sec -= before.tv_sec; 70 after.tv_usec -= before.tv_usec; 71 if (after.tv_usec < 0) 72 after.tv_sec--, after.tv_usec += 1000000; 73 fprintf(stderr, "%9ld.%02ld real ", after.tv_sec, after.tv_usec/10000); 74 fprintf(stderr, "%9ld.%02ld user ", 75 ru.ru_utime.tv_sec, ru.ru_utime.tv_usec/10000); 76 fprintf(stderr, "%9ld.%02ld sys\n", 77 ru.ru_stime.tv_sec, ru.ru_stime.tv_usec/10000); 78 if (lflag) { 79 int hz = 100; /* XXX */ 80 long ticks; 81 82 ticks = hz * (ru.ru_utime.tv_sec + ru.ru_stime.tv_sec) + 83 hz * (ru.ru_utime.tv_usec + ru.ru_stime.tv_usec) / 1000000; 84 fprintf(stderr, "%10ld %s\n", 85 ru.ru_maxrss, "maximum resident set size"); 86 fprintf(stderr, "%10ld %s\n", 87 ru.ru_ixrss / ticks, "average shared memory size"); 88 fprintf(stderr, "%10ld %s\n", 89 ru.ru_idrss / ticks, "average unshared data size"); 90 fprintf(stderr, "%10ld %s\n", 91 ru.ru_isrss / ticks, "average unshared stack size"); 92 fprintf(stderr, "%10ld %s\n", 93 ru.ru_minflt, "page reclaims"); 94 fprintf(stderr, "%10ld %s\n", 95 ru.ru_majflt, "page faults"); 96 fprintf(stderr, "%10ld %s\n", 97 ru.ru_nswap, "swaps"); 98 fprintf(stderr, "%10ld %s\n", 99 ru.ru_inblock, "block input operations"); 100 fprintf(stderr, "%10ld %s\n", 101 ru.ru_oublock, "block output operations"); 102 fprintf(stderr, "%10ld %s\n", 103 ru.ru_msgsnd, "messages sent"); 104 fprintf(stderr, "%10ld %s\n", 105 ru.ru_msgrcv, "messages received"); 106 fprintf(stderr, "%10ld %s\n", 107 ru.ru_nsignals, "signals received"); 108 fprintf(stderr, "%10ld %s\n", 109 ru.ru_nvcsw, "voluntary context switches"); 110 fprintf(stderr, "%10ld %s\n", 111 ru.ru_nivcsw, "involuntary context switches"); 112 } 113 exit (status>>8); 114 } 115