Headers include fix for Mac OS X.

[TD_SE.git] / TD3 / exo3 / exo3.c

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>

int main()
{
	pid_t pid;

	if ((pid = fork()) == -1) {
		perror("erreur");
		exit(EXIT_FAILURE);
	} else if (pid == 0) {
		execlp("who", "who", NULL);
		perror("execlp");
		exit(1);
	}

	// without it just exec with the &
	// with it exec with the ;
	wait(NULL);

	if ((pid = fork()) == -1) {
		perror("erreur");
		exit(EXIT_FAILURE);
	} else if (pid == 0) {
		execlp("ps", "ps", NULL);
		perror("execlp");
		exit(1);
	}

	wait(NULL);

	execlp("ls", "ls", "-l", NULL);
	perror("execlp");
}