From 8d07fc6fef67b7125e12f99f6e9dbd5c7c4fa669 Mon Sep 17 00:00:00 2001
From: Akemi Izuko <akemi@noway.moe>
Date: Tue, 24 Sep 2024 13:44:04 -0600
Subject: [PATCH] Add lab 2 demos

---
 lab2/demos/Makefile_bad   | 14 ++++++++++++++
 lab2/demos/Makefile_good  | 10 ++++++++++
 lab2/demos/duplicate_fd.c | 17 +++++++++++++++++
 lab2/demos/pipe.c         | 17 +++++++++++++++++
 4 files changed, 58 insertions(+)
 create mode 100644 lab2/demos/Makefile_bad
 create mode 100644 lab2/demos/Makefile_good
 create mode 100644 lab2/demos/duplicate_fd.c
 create mode 100644 lab2/demos/pipe.c

diff --git a/lab2/demos/Makefile_bad b/lab2/demos/Makefile_bad
new file mode 100644
index 0000000..167f908
--- /dev/null
+++ b/lab2/demos/Makefile_bad
@@ -0,0 +1,14 @@
+SHELL=/bin/bash
+CC=gcc
+CFLAGS=-std=c99 -Wall -Wextra -D_POSIX_C_SOURCE=201112L
+
+.PHONY: all clean
+
+all: server client
+
+server: server.c
+
+client: client.c
+
+clean:
+	$(RM) server client
diff --git a/lab2/demos/Makefile_good b/lab2/demos/Makefile_good
new file mode 100644
index 0000000..a2f0f6c
--- /dev/null
+++ b/lab2/demos/Makefile_good
@@ -0,0 +1,10 @@
+all: server client
+
+server: server.c
+	gcc -Wall -Wextra -Werror -D_POSIX_C_SOURCE=201112L -o server server.c
+
+client: client.c
+	gcc -Wall -Wextra -Werror -D_POSIX_C_SOURCE=201112L -o client client.c
+
+clean:
+	rm -f server client
diff --git a/lab2/demos/duplicate_fd.c b/lab2/demos/duplicate_fd.c
new file mode 100644
index 0000000..a4ceae5
--- /dev/null
+++ b/lab2/demos/duplicate_fd.c
@@ -0,0 +1,17 @@
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <fcntl.h>
+
+int main(void) {
+    int fd = open("test.txt", O_CREAT | O_WRONLY);
+
+    if(fd < 0) {
+        printf("Error opening the file\n");
+    }
+
+    dup2(fd, 1);
+    printf("Tester\n");
+
+    close(fd);
+}
diff --git a/lab2/demos/pipe.c b/lab2/demos/pipe.c
new file mode 100644
index 0000000..df7edb2
--- /dev/null
+++ b/lab2/demos/pipe.c
@@ -0,0 +1,17 @@
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <fcntl.h>
+
+int main(void) {
+    char buf[100];
+    char msg[] = "Mario";
+
+    int p[2];
+    pipe(p);
+
+    write(p[1], msg, sizeof(msg));
+    read(p[0], buf, sizeof(msg));
+
+    printf("Out from the pipe: `%s`\n", buf);
+}