#include <unistd.h>   /* exec, getcwd */
#include <stdio.h>    /* printf */

/* Exec example code */
/* This program simply execs "/bin/ls" */

void main(void) {
  char buf[1000];

  printf("Here are the files in %s:\n",
	 getcwd(buf,1000));
  execl("/bin/ls","ls","-al",NULL);
  printf("If exec works, this line won't be printed\n");
}