clone.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <sched.h>
   4 #include <sys/wait.h>
   5 #include <sys/types.h>
   6
   7 #define UNUSED(x) (x = x)
   8 #define STACK_SIZE 16
   9
  10 int child(void *arg)
  11 {
  12         UNUSED(arg);
  13
  14         printf("[child] Hello world!\n");
  15         return 0;
  16 }
  17
  18 int main(void)
  19 {
  20         int tid;
  21         char stack[STACK_SIZE];
  22
  23         tid = clone(child, (void *) stack, 0, NULL);
  24         if (tid < 0) {
  25                 perror("clone()");
  26                 exit(1);
  27         }
  28
  29         wait(NULL);
  30
  31         printf("[parent]: exiting\n");
  32         return 0;
  33 }