Done until djumbai-send

src/djumbai_send/djumbai_send.c

@@ -1,3 +1,54 @@
-int main(){
+#include "../../libs/protocol/protocol.h"
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <unistd.h>
 
+int main() {
+
+	// Open the FIFO for writing
+	const char *send_fifo_path = "fifos/send_fifo";
+	if (access(send_fifo_path, F_OK) != -1) {
+		// FIFO exists, delete it
+		if (unlink(send_fifo_path) == -1) {
+			perror("unlink");
+			exit(EXIT_FAILURE);
+		}
+		printf("Existing FIFO deleted.\n");
+	}
+
+	// Open the FIFO for reading
+	if (mkfifo(send_fifo_path, 0420) == -1) {
+		perror("mkfifo");
+		exit(EXIT_FAILURE);
+	}
+
+	int send_fifo_fd;
+	send_fifo_fd = open(send_fifo_path, O_RDONLY);
+	if (send_fifo_fd == -1) {
+		if (errno == ENOENT) {
+			// FIFO does not exist
+			printf("FIFO '%s' does not exist. Exiting...\n", send_fifo_path);
+			return 1;
+		} else {
+			perror("open");
+			return 1;
+		}
+	}
+
+	unsigned char buffer[MESSAGE_SIZE];
+	while (1) {
+		read(send_fifo_fd, buffer, MESSAGE_SIZE);
+
+		// SPAWN THE CHILD PROCESS TO PUT THE MESSAGE IN THE USER'S QUEUE
+		// CHECK IF THE MESSAGE IS DESTINED TO A GROUP
+        // IF IT IS DESTINED TO A GROUP, START THE CHILD PROCESS WITH THE UID OF THE SENDER AND GID OF THE GROUP
+        // THE SENDER MUST BE PART OF THE GROUP
+
+		memset(buffer, 0, MESSAGE_SIZE);
+	}
+	close(send_fifo_fd);
+	unlink(send_fifo_path);
 }