feat: update structure

cs2106/labs/lab2/part2/lab2p2e.c

@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/wait.h>
+
+int main() {
+    int p[2];
+    char str[] = "Hello this is the parent.";
+
+    // This creates a pipe. p[0] is the reading end,
+    // p[1] is the writing end.
+
+    if(pipe(p) < 0) 
+        perror("lab2p2e: ");
+
+    // We will send a message from father to child
+    if(fork() != 0) {
+        close(p[0]); // The the end we are not using.
+        write(p[1], str, strlen(str));
+        close(p[1]);
+        wait(NULL);
+    }
+    else
+    {
+        char buffer[128];
+
+        close(p[1]); // Close the writing end
+        read(p[0], buffer, 127);
+        printf("Child got the message \"%s\"\n", buffer);
+        close(p[0]);
+    }
+}
+