[SP/P11] Solved exercises

1 files changed, 30 insertions, 0 deletions

diff --git a/Year 3/System programming/Practice11/ex2.c b/Year 3/System programming/Practice11/ex2.c
new file mode 100644
index 0000000..94ca590
--- /dev/null
+++ b/Year 3/System programming/Practice11/ex2.c
@@ -0,0 +1,30 @@
+#include <unistd.h>
+#include <stdio.h>
+#include <semaphore.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+int main() {
+	sem_t* sem = sem_open("/sem", O_CREAT, 0755, 0);
+
+	int fod = fork();
+	if (fod == 0) {
+		while (1) {
+			sem_wait(sem);
+			printf("world\n");
+		}
+	}
+	else {
+		while (1) {
+			printf("hello\n");
+			sem_post(sem);
+			sleep(1);
+		}
+	}
+
+	sem_close(sem);
+	if (fod != 0)
+		sem_unlink("/sem");
+
+	return 0;
+}