mysplit.c

   1 /*
   2  * mysplit.c - Another handy routine for testing your tiny shell
   3  *
   4  * usage: mysplit <n>
   5  * Fork a child that spins for <n> seconds in 1-second chunks.
   6  */
   7 #include <stdio.h>
   8 #include <unistd.h>
   9 #include <stdlib.h>
  10 #include <sys/types.h>
  11 #include <sys/wait.h>
  12 #include <signal.h>
  13
  14 int main(int argc, char **argv)
  15 {
  16     int i, secs;
  17
  18     if (argc != 2) {
  19         fprintf(stderr, "Usage: %s <n>\n", argv[0]);
  20         exit(0);
  21     }
  22     secs = atoi(argv[1]);
  23
  24
  25     if (fork() == 0) { /* child */
  26         for (i=0; i < secs; i++)
  27             sleep(1);
  28         exit(0);
  29     }
  30
  31     /* parent waits for child to terminate */
  32     wait(NULL);
  33
  34     exit(0);
  35 }