From d4366c2eeb49a37cd50db3962d5489e453a1f18c Mon Sep 17 00:00:00 2001
From: Syndamia <kamen@syndamia.com>
Date: Wed, 8 Nov 2023 13:26:46 +0200
Subject: [SP/P5] Added solutions to some exercises from today

---
 Year 3/System programming/Practicum5/ex3.c | 38 ++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 Year 3/System programming/Practicum5/ex3.c

(limited to 'Year 3/System programming/Practicum5/ex3.c')

diff --git a/Year 3/System programming/Practicum5/ex3.c b/Year 3/System programming/Practicum5/ex3.c
new file mode 100644
index 0000000..b7b33e0
--- /dev/null
+++ b/Year 3/System programming/Practicum5/ex3.c	
@@ -0,0 +1,38 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdio.h>
+
+int main() {
+	int f1 = open("read.txt", O_RDONLY);
+	if (f1 < 0) {
+		perror("open read.txt");
+		return 1;
+	}
+
+	int f2 = open("write.txt", O_CREAT | O_WRONLY | O_TRUNC, 0755);
+	if (f2 < 0) {
+		perror("open write.txt");
+		return 1;
+	}
+
+	pid_t fpid = fork();
+	if (fpid < 0) {
+		perror("fork");
+		return 2;
+	}
+
+	if (fpid == 0) { // child
+		for (int i = 0; i < 5; i++) {
+			sleep(2);
+			write(f2, "abc", 3);
+		}
+	}
+	else {
+		char buff[3];
+		for (int i = 0; i < 5; i++) {
+			read(f1, buff, 3);
+			write(f2, buff, 3);
+			sleep(1);
+		}
+	}
+}
-- 
cgit v1.3.1-26-gb76a