BSD 4 release

[unix-history] / usr / src / cmd / time.c

static  char *sccsid = "@(#)time.c      4.2 (Berkeley) 10/9/80";
/* time command */

#include <stdio.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/times.h>

extern int errno;
extern char *sys_errlist[];

main(argc, argv)
char **argv;
{
       struct tms buffer, obuffer;
       int status;
       register p;
       time_t before, after;

       if(argc<=1)
               exit(0);
       time(&before);
       p = fork();
       if(p == -1) {
               fprintf(stderr, "Try again.\n");
               exit(1);
       }
       if(p == 0) {
               execvp(argv[1], &argv[1]);
               fprintf(stderr, "%s: %s\n", argv[1], sys_errlist[errno]);
               exit(1);
       }
       signal(SIGINT, SIG_IGN);
       signal(SIGQUIT, SIG_IGN);
       times(&obuffer);
       while(wait(&status) != p)
               times(&obuffer);
       time(&after);
       if((status&0377) != 0)
               fprintf(stderr,"Command terminated abnormally.\n");
       times(&buffer);
       printt("real", (after-before) * 60);
       printt("user", buffer.tms_cutime - obuffer.tms_cutime);
       printt("sys ", buffer.tms_cstime - obuffer.tms_cstime);
       fprintf(stderr, "\n");
       exit(status>>8);
}

char quant[] = { 6, 10, 10, 6, 10, 6, 10, 10, 10 };
char *pad  = "000      ";
char *sep  = "\0\0.\0:\0:\0\0";
char *nsep = "\0\0.\0 \0 \0\0";

printt(s, a)
char *s;
long a;
{
       char digit[9];
       register i;
       char c;
       int nonzero;

       for(i=0; i<9; i++) {
               digit[i] = a % quant[i];
               a /= quant[i];
       }
       nonzero = 0;
       while(--i>0) {
               c = digit[i]!=0 ? digit[i]+'0':
                   nonzero ? '0':
                   pad[i];
               if (c)
               fprintf(stderr,"%c",c);
               nonzero |= digit[i];
               c = nonzero?sep[i]:nsep[i];
               if (c)
               fprintf(stderr,"%c",c);
       }
       fprintf(stderr," %s ",s);
}