[SP/P6] Solved exercises

1 files changed, 40 insertions, 0 deletions

diff --git a/Year 3/System programming/Practicum6/ex5.c b/Year 3/System programming/Practicum6/ex5.c
new file mode 100644
index 0000000..903732d
--- /dev/null
+++ b/Year 3/System programming/Practicum6/ex5.c
@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+int main(int argc, char* argv[]) {
+	int pf[2];
+	pipe(pf);
+	int f = fork();
+	if (f == 0) { // child
+		if (close(pf[0]) < 0) {
+			perror("close");
+			return 1;
+		}
+		dup2(pf[1], 1);
+		if (close(pf[1]) < 0) {
+			perror("close");
+			return 2;
+		}
+
+		execlp(argv[1], argv[1], (char*)NULL);
+	}
+	else {
+		if (close(pf[1]) < 0) {
+			perror("close");
+			return 3;
+		}
+		dup2(pf[0], 0);
+		if (close(pf[0]) < 0) {
+			perror("close");
+			return 4;
+		}
+
+		int status;
+		wait(&status);
+
+		execlp(argv[2], argv[2], (char*)NULL);
+	}
+	return 0;
+}