1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <sys/wait.h>
   5 #include <sys/types.h>
   6 
   7 int main(int argc, char *argv[])
   8 {
   9     pid_t pid;
  10     
  11     pid = fork();
  12     if (pid < 0) {
  13         fprintf(stderr, "fork failed\n");
  14         exit(1);
  15     }
  16     
  17     if(pid == 0) {
  18         execlp("ls", "ls", "-a", "-l", (char *) NULL);
  19         // pokud exec neselze tento kod se nevykona
  20         perror("execl failed");
  21         exit(2);
  22     }
  23     printf("parent carries on\n");
  24     exit(0);
  25 }