ipc/fork_mult.c

   1 /* compile with:
   2    gcc fork_mult.c -o fork_mult -Wall -W -Wextra -ansi -pedantic */
   3
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <unistd.h>
   7
   8 #define NUM_CHILDS 5
   9
  10 int main(void)
  11 {
  12     pid_t pid[NUM_CHILDS];
  13     int i;
  14
  15     for (i = 0; i < NUM_CHILDS; i++) {
  16         if ((pid[i] = fork()) < 0) {    /* fork errror */
  17             perror("fork");
  18             exit(EXIT_FAILURE);
  19         }
  20         else if (pid[i] > 0) {          /* parent process */
  21         }
  22         else if (pid[i] == 0) {         /* child process */
  23             printf("Child[%d] = %d\n", i, getpid());
  24
  25             /* break, or else every child will spawan it's own children */
  26             break;
  27         }
  28     }
  29    return EXIT_SUCCESS;
  30 }