benchmarks/unixbench-5.1.2/src/spawn.c

   1 /*******************************************************************************
   2  *  The BYTE UNIX Benchmarks - Release 3
   3  *          Module: spawn.c   SID: 3.3 5/15/91 19:30:20
   4  *
   5  *******************************************************************************
   6  * Bug reports, patches, comments, suggestions should be sent to:
   7  *
   8  *      Ben Smith, Rick Grehan or Tom Yagerat BYTE Magazine
   9  *      ben@bytepb.byte.com   rick_g@bytepb.byte.com   tyager@bytepb.byte.com
  10  *
  11  *******************************************************************************
  12  *  Modification Log:
  13  *  $Header: spawn.c,v 3.4 87/06/22 14:32:48 kjmcdonell Beta $
  14  *  August 29, 1990 - Modified timing routines (ty)
  15  *  October 22, 1997 - code cleanup to remove ANSI C compiler warnings
  16  *                     Andy Kahn <kahn@zk3.dec.com>
  17  *
  18  ******************************************************************************/
  19 char SCCSid[] = "@(#) @(#)spawn.c:3.3 -- 5/15/91 19:30:20";
  20 /*
  21  *  Process creation
  22  *
  23  */
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <sys/wait.h>
  28 #include "timeit.c"
  29
  30 unsigned long iter;
  31
  32 void report(int sig)
  33 {
  34         fprintf(stderr,"COUNT|%lu|1|lps\n", iter);
  35         exit(0);
  36 }
  37
  38 int main(int argc, char *argv[])
  39 {
  40         int     slave, duration;
  41         int     status;
  42
  43         if (argc != 2) {
  44                 fprintf(stderr,"Usage: %s duration \n", argv[0]);
  45                 exit(1);
  46         }
  47
  48         duration = atoi(argv[1]);
  49
  50         iter = 0;
  51         wake_me(duration, report);
  52
  53         while (1) {
  54                 if ((slave = fork()) == 0) {
  55                         /* slave .. boring */
  56 #if debug
  57                         printf("fork OK\n");
  58 #endif
  59                         /* kill it right away */
  60                         exit(0);
  61                 } else if (slave < 0) {
  62                         /* woops ... */
  63                         fprintf(stderr,"Fork failed at iteration %lu\n", iter);
  64                         perror("Reason");
  65                         exit(2);
  66                 } else
  67                         /* master */
  68                         wait(&status);
  69                 if (status != 0) {
  70                         fprintf(stderr,"Bad wait status: 0x%x\n", status);
  71                         exit(2);
  72                 }
  73                 iter++;
  74 #if debug
  75                 printf("Child %d done.\n", slave);
  76 #endif
  77                 }
  78 }