1 files changed, 29 insertions, 0 deletions
diff --git a/semestr-5/so/lista4/so21_lista_4/zad6.c b/semestr-5/so/lista4/so21_lista_4/zad6.c
new file mode 100644
index 0000000..117fea9
--- /dev/null
+++ b/semestr-5/so/lista4/so21_lista_4/zad6.c
@@ -0,0 +1,29 @@
+#include "csapp.h"
+
+bool f_lock(const char *path) {
+    if (open(path, O_CREAT|O_WRONLY|O_EXCL, 0700) == -1) {
+        if (errno != EEXIST) {
+            printf("%s\n", strerror(errno)); 
+            exit(EXIT_FAILURE);
+        }
+        printf("%s\n", strerror(errno)); 
+        return false;
+    }
+    return true;
+}
+
+void f_unlock(const char *path) {
+    Unlink(path);
+}
+
+
+const char *name = "lock";
+
+int main(void) {
+    while (1) {
+        if (f_lock(name)) {
+            // printf("Hello\n");
+            f_unlock(name);
+        }
+    }
+}
+\ No newline at end of file