forkwait1b.c

#include <stdio.h>
#include <comp421/yalnix.h>

int
main(int argc, char **argv)
{

	(void)argc;
	(void)argv;

    int pid1, pid2;
    int status;
    int i;

    setbuf(stdout, NULL);

    printf("FORKWAIT> This program tests that Wait collects zombie processes\n");
    printf("FORKWAIT> If no more FORKWAIT output, Fork does not work\n");

    for (i = 0; i < 10; i++) {

	if ((pid1 = Fork()) == 0)
	{
	    printf("FORKWAIT> CHILD about to exit with 1234567\n");
	    Exit(1234567);
	}

	printf("FORKWAIT> PARENT: child pid = %d, &status = %p\n",
	    pid1, &status);
	Delay(2);

	pid2 = Wait(&status);

	printf("FORKWAIT> Wait returned pid %d status %d\n", pid2, status);
	if (pid2 != pid1 || status != 1234567) {
	    printf("Should have returned pid %d status 1234567!!\n", pid1);
	    Exit(1);
	}
	else {
	    printf("FORKWAIT> GOOD!\n");
	}
	  
    }

    Exit(0);
}