benchmarks/unixbench-5.1.2/src/looper.c

   1 /*******************************************************************************
   2  *  The BYTE UNIX Benchmarks - Release 1
   3  *          Module: looper.c   SID: 1.4 5/15/91 19:30:22
   4  *
   5  *******************************************************************************
   6  * Bug reports, patches, comments, suggestions should be sent to:
   7  *
   8  *      Ben Smith or Tom Yager at BYTE Magazine
   9  *      ben@bytepb.byte.com   tyager@bytepb.byte.com
  10  *
  11  *******************************************************************************
  12  *  Modification Log:
  13  *
  14  *  February 25, 1991 -- created (Ben S.)
  15  *  October 22, 1997 - code cleanup to remove ANSI C compiler warnings
  16  *                     Andy Kahn <kahn@zk3.dec.com>
  17  *
  18  ******************************************************************************/
  19 char SCCSid[] = "@(#) @(#)looper.c:1.4 -- 5/15/91 19:30:22";
  20 /*
  21  *  Shell 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 char *cmd_argv[28];
  32 int  cmd_argc;
  33
  34 void report(int sig)
  35 {
  36         fprintf(stderr,"COUNT|%lu|60|lpm\n", iter);
  37         exit(0);
  38 }
  39
  40 int main(int argc, char *argv[])
  41 {
  42 int     slave, count, duration;
  43 int     status;
  44
  45 if (argc < 2)
  46         {
  47         fprintf(stderr,"Usage: %s duration command [args..]\n", argv[0]);
  48         fprintf(stderr,"  duration in seconds\n");
  49         exit(1);
  50         }
  51
  52 if((duration = atoi(argv[1])) < 1)
  53         {
  54         fprintf(stderr,"Usage: %s duration command [arg..]\n", argv[0]);
  55         fprintf(stderr,"  duration in seconds\n");
  56         exit(1);
  57         }
  58
  59 /* get command  */
  60 cmd_argc=argc-2;
  61 for( count=2;count < argc; ++count)
  62         cmd_argv[count-2]=argv[count];
  63 #ifdef DEBUG
  64 printf("<<%s>>",cmd_argv[0]);
  65 for(count=1;count < cmd_argc; ++count)
  66         printf(" <%s>", cmd_argv[count]);
  67 putchar('\n');
  68 exit(0);
  69 #endif
  70
  71 iter = 0;
  72 wake_me(duration, report);
  73
  74 while (1)
  75         {
  76         if ((slave = fork()) == 0)
  77                 { /* execute command */
  78                 execvp(cmd_argv[0],cmd_argv);
  79                 exit(99);
  80                 }
  81         else if (slave < 0)
  82                 {
  83                 /* woops ... */
  84                 fprintf(stderr,"Fork failed at iteration %lu\n", iter);
  85                 perror("Reason");
  86                 exit(2);
  87                 }
  88         else
  89                 /* master */
  90                 wait(&status);
  91         if (status == 99 << 8)
  92                 {
  93                 fprintf(stderr, "Command \"%s\" didn't exec\n", cmd_argv[0]);
  94                 exit(2);
  95                 }
  96         else if (status != 0)
  97                 {
  98                 fprintf(stderr,"Bad wait status: 0x%x\n", status);
  99                 exit(2);
 100                 }
 101         iter++;
 102         }
 103 }