test: Uncomment pipes

Otherwise there is no way to pass pipes test
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

testee.c

@@ -80,7 +80,7 @@ static int run_clone(void)
 
 int main(int argc, char *argv[])
 {
-//	int pipefd[2];
+	int pipefd[2];
 	int fd_shared, fd_private;
 	const char data_mark[] = "This is a data_mark marker";
 	void *mmap_shared, *mmap_private, *mmap_anon, *map_unreadable;
@@ -94,10 +94,10 @@ int main(int argc, char *argv[])
 
 	printf("%s pid %d\n", argv[0], getpid());
 
-//	if (pipe(pipefd)) {
-//		perror("Can't create pipe");
-//		goto err;
-//	}
+	if (pipe(pipefd)) {
+		perror("Can't create pipe");
+		goto err;
+	}
 
 	fd_shared = open("testee-shared.img", O_RDWR | O_CREAT | O_TRUNC, 0600);
 	if (fd_shared < 0) {
@@ -207,8 +207,8 @@ int main(int argc, char *argv[])
 			goto err;
 		if (child == 0) {
 			printf("first child pid: %d\n", getpid());
-//			while (read(pipefd[0], &buf, sizeof(buf)) > 0)
-//				sleep(3);
+			while (read(pipefd[0], &buf, sizeof(buf)) > 0)
+				sleep(3);
 			*(unsigned long *)mmap_anon_sh = 0x11111111;
 			while (1) {
 				printf("ping: %d\n", getpid());
@@ -228,7 +228,7 @@ int main(int argc, char *argv[])
 		while (1) {
 			*(unsigned long *)mmap_anon_sh = 0x33333333;
 			printf("ping: %d\n", getpid());
-//			write(pipefd[1], &buf, sizeof(buf));
+			write(pipefd[1], &buf, sizeof(buf));
 			sleep(10);
 		}
 	}