fork3.c

#include <stdio.h>
#include <unistd.h>
int main() {
  pid_t ChildID;
  ChildID = fork();  // check for Fork
  if (ChildID >= 0)  // fork sucess
  {
    if (ChildID == 0)  // Code Of Child which the value will be 0 in
                       // case of Child code
    {
      char* argv[4];
      argv[0] = "ls";

      argv[1] = NULL;
      execv(argv[0], argv);
    } else  // Code of parent and the value of ChildID = process ID of child in
            // case of
    {
      wait(NULL);
    }
  } else {
    printf("Fork is fail \n");
    return 1;
  }
  return 0;
}