[SP/P02] Solved exercises from second practice

1 files changed, 24 insertions, 0 deletions

diff --git a/Year 3/System programming/Practice02/ex2.c b/Year 3/System programming/Practice02/ex2.c
new file mode 100644
index 0000000..6a8c420
--- /dev/null
+++ b/Year 3/System programming/Practice02/ex2.c
@@ -0,0 +1,24 @@
+#include <fcntl.h> // open, close, O_WRONLY, ...
+#include <unistd.h> // dup
+#include <stdio.h> // printf
+
+int main(int argc, char* argv[]) {
+	int f1 = open(argv[1], O_WRONLY | O_CREAT | O_TRUNC, 0755);
+	if (f1 < 0) {
+		perror("open");
+		return 1;
+	}
+
+	close(1);
+
+	int f2 = dup(f1);
+	if (f2 < 0) {
+		perror("dup");
+		return 2;
+	}
+
+	printf("Hello World!\n");
+
+	close(f1);
+	close(f2);
+}