basic structure and client process chain done

src/client.c

@@ -1,4 +0,0 @@
-#include <sys/stat.h>
-
-int main(){
-}

src/client/client.c

@@ -0,0 +1,68 @@
+#include "client.h"
+#include <stdio.h>
+
+int send_message(unsigned int sender, unsigned int receiver) {
+	int pipe_to_child[2];
+
+	if (pipe(pipe_to_child) == -1) {
+		perror("pipe");
+		exit(EXIT_FAILURE);
+	}
+
+	pid_t pid = fork();
+	if (pid == -1) {
+		perror("fork");
+		exit(EXIT_FAILURE);
+	}
+
+	if (pid == 0) {				 // Child process
+		close(pipe_to_child[1]); // Close write end of pipe
+
+		// Redirect stdin to read from pipe_to_child
+		dup2(pipe_to_child[0], STDIN_FILENO);
+
+
+		// Execute a command, for example, a simple "cat" command
+		execlp("./bin/djumbai_client_send/djumbai_client_send", "djumbai_client_send", NULL);
+
+		// If execlp fails
+		perror("execlp");
+		close(pipe_to_child[0]);
+		exit(EXIT_FAILURE);
+	} else {					 // Parent process
+		close(pipe_to_child[0]); // Close read end of pipe
+
+		printf("Please enter your message (Max of %ld bytes):\n", MAX_CONTENT_SIZE);
+		char content[MAX_CONTENT_SIZE];
+		fgets(content, MAX_CONTENT_SIZE, stdin);
+
+		message msg;
+		if (new_message(&msg, sender, receiver, content) != 0) {
+			printf("Error when creating new message\n");
+		}
+
+		// Serialize the message
+		unsigned char buffer[sizeof(struct Message)];
+		if (serialize_message(&msg, sizeof(struct Message), buffer) == -1) {
+			fprintf(stderr, "Error: Serialization failed\n");
+			return 1;
+		}
+
+		write(pipe_to_child[1], buffer, sizeof(buffer));
+
+		// Close the write end of the pipe
+		close(pipe_to_child[1]);
+		// Wait for the child process to finish
+		wait(NULL);
+	}
+
+	return 0;
+}
+
+int main() {
+	// TODO: Client parsing to be done
+	unsigned int sender = getuid();
+	unsigned int receiver = 1000;
+	send_message(sender, receiver);
+	return 0;
+}

src/client/client.h

@@ -0,0 +1,12 @@
+#ifndef CLIENT_H
+#define CLIENT_H
+
+#include "../../libs/communication/communication.h"
+#include "../../libs/protocol/protocol.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+int send_message(unsigned int sender, unsigned int receiver);
+#endif // !CLIENT_H

src/djumbai_client_receive/djumbai_client_receive.c

@@ -0,0 +1,3 @@
+int main(){
+
+}

src/djumbai_client_send/djumbai_client_send.c

@@ -0,0 +1,47 @@
+#include "../../libs/protocol/protocol.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int main() {
+
+	int pipe_to_child[2];
+
+	if (pipe(pipe_to_child) == -1) {
+		perror("pipe");
+		exit(EXIT_FAILURE);
+	}
+
+	pid_t pid = fork();
+	if (pid == -1) {
+		perror("fork");
+		exit(EXIT_FAILURE);
+	}
+
+	if (pid == 0) {				 // Child process
+		close(pipe_to_child[1]); // Close write end of pipe
+
+		// Redirect stdin to read from pipe_to_child
+		dup2(pipe_to_child[0], STDIN_FILENO);
+
+		execlp("./bin/djumbai_enqueue/djumbai_enqueue", "djumbai_enqueue", NULL);
+
+		// If execlp fails
+		perror("execlp");
+		close(pipe_to_child[0]);
+		exit(EXIT_FAILURE);
+	} else {					 // Parent process
+		close(pipe_to_child[0]); // Close read end of pipe
+
+		unsigned char buffer[sizeof(struct Message)];
+		read(0, buffer, sizeof(struct Message));
+		write(pipe_to_child[1], buffer, sizeof(buffer));
+
+		// Close the write end of the pipe
+		close(pipe_to_child[1]);
+		// Wait for the child process to finish
+		wait(NULL);
+	}
+
+	return 0;
+}

src/djumbai_dequeue/djumbai_dequeue.c

@@ -0,0 +1,8 @@
+#include <unistd.h>
+
+int main(){
+    //Make stdin the FIFO
+    //Read from FIFO
+    //Make stdout the output FIFO
+    //Write to another FIFO
+}

src/djumbai_dequeue/djumbai_dequeue.h

@@ -0,0 +1,8 @@
+#include <unistd.h>
+
+int main(){
+    //Make stdin the FIFO
+    //Read from FIFO
+    //Make stdout the output FIFO
+    //Write to another FIFO
+}

src/djumbai_enqueue/djumbai_enqueue.c

@@ -0,0 +1,30 @@
+#include "djumbai_enqueue.h"
+
+int main() {
+    //Change the root of the djumbai_enqueue process so it doesn't have access to anything else.
+    chroot("/opt/djumbai/queue/");
+	const char *message_queue_path =
+		"mailqueue"; // Replace this with the path to your FIFO
+
+	// Open the FIFO for writing
+	int queue_fd;
+	queue_fd = open(message_queue_path, O_WRONLY);
+	if (queue_fd == -1) {
+		if (errno == ENOENT) {
+			// FIFO does not exist
+			printf("FIFO '%s' does not exist. Exiting...\n", message_queue_path);
+			return 1;
+		} else {
+			perror("open");
+			return 1;
+		}
+	}
+
+	// Read message from stdin
+	unsigned char buffer[MESSAGE_SIZE];
+	read(0, buffer, MESSAGE_SIZE);
+
+	// Write message to message queue
+	write(queue_fd, buffer, MESSAGE_SIZE);
+    close(queue_fd);
+}

src/djumbai_enqueue/djumbai_enqueue.h

@@ -0,0 +1,12 @@
+#ifndef DJUMBAI_ENQUEUE_H
+#define DJUMBAI_ENQUEUE_H
+
+#include "../../libs/protocol/protocol.h"
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int main();
+
+#endif // !DJUMBAI_ENQUEUE_H

src/djumbai_send/djumbai_send.c

@@ -0,0 +1,3 @@
+int main(){
+
+}