/* Demonstrate vfork. Note that parent returns immediately after */
/* the exec call is made, not waiting for the execed process to  */
/* terminate. 							 */
/* Sample calls (executable named testvfork):			 */
/* testvfork ls -l | more					 */
/* testvfork cat testvfork.c					 */
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>

main(argc,argv)
int argc;
char *argv[];
{pid_t IsParent;
 printf("!\n"); 
 IsParent=vfork();
 if (IsParent) {
  fprintf(stderr,"Parent Returns!\n"); 
  /* Don't need to flush. stderr is also not buffered */
 }
 else {
  execvp(argv[1],argv+1);
 }
}