/* A quick example using exec to demonstrate shell execution w vfork */
/* Run it to screen, and then redirect to file. Is the output different? */
#include <unistd.h>
#include <stdio.h>

main()
{int status;
 if (vfork()==0) {  	/* Use vfork to force child to go first-same if fork */
  pid_t pid=getpid();
  printf("Child's pid is %d\n",pid);

  printf("No Path Search - Full display\n");
  execl("/bin/ls","/bin/ls","-l",NULL);

  // Uncomment to see if parent waits after start of exec
  // execlp("sleep","sleep","5",NULL);  

  // execlp("ps","ps",NULL);    // Uncomment to see pid while executing
 }
 else  { // parent
  printf("Parent Process Resumes \n");
  pid_t pid=wait(&status);
  printf("Child PID %d Returned with Status %d\n",pid,status);
  exit(0);
 }
}