add a simple test for msgctl

test/misc/tst-msgctl.c

@@ -0,0 +1,84 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <sys/ipc.h>
+#include <sys/msg.h>
+#include <sys/types.h>
+
+// Define the message structure
+struct msg_buffer {
+    long msg_type;
+    char msg_text[100];
+};
+
+void print_queue_times(int msgid) {
+     struct msqid_ds info;
+     if (msgctl(msgid, IPC_STAT, &info) == -1) {
+	 perror("msgctl IPC_STAT failed");
+         exit(1);
+     }
+
+     printf("Last send time (msg_stime): %s", ctime(&info.msg_stime));     
+     printf("Last recv time (msg_rtime): %s", ctime(&info.msg_rtime));     
+     printf("Last change time (msg_ctime): %s", ctime(&info.msg_ctime));     
+
+}
+
+int main() {
+    key_t key;
+    int msgid;
+    struct msqid_ds buf;
+
+    // Generate a unique key
+    key = ftok("progfile", 65);
+   
+    // Create a message queue and return its id
+    msgid = msgget(key, 0666 | IPC_CREAT);
+    if (msgid == -1) {
+        perror("msgget failed");
+        exit(EXIT_FAILURE);
+    }
+
+    // Prepare message to send
+    struct msg_buffer message;
+    message.msg_type = 1;
+    strcpy(message.msg_text, "Hello from message queue!");
+
+    // Send the message
+    if (msgsnd(msgid, &message, sizeof(message.msg_text), 0) < 0) {
+	perror("msgsnd failed");
+        exit(EXIT_FAILURE);
+    }
+
+    printf("Message sent: %s\n", message.msg_text);
+    print_queue_times(msgid);  // Show msg_stime after sending
+
+    // Get information about the message queue
+    if (msgctl(msgid, IPC_STAT, &buf) == -1) {
+        perror("msgctl - IPC_STAT failed");
+        exit(EXIT_FAILURE);
+    }
+
+    // Print some info from the msqid_ds structure
+    printf("Message queue ID: %d\n", msgid);
+
+    // Receive the message
+    struct msg_buffer received;
+    if (msgrcv(msgid, &received, sizeof(received.msg_text), 1, 0) < 0) {
+	perror("msgrcv failed");
+        exit(EXIT_FAILURE);
+    }
+    printf("Message received: %s\n", received.msg_text);
+    print_queue_times(msgid);  // Show msg_stime after receiving
+
+    // Remove the message queue
+    if (msgctl(msgid, IPC_RMID, NULL) == -1) {
+        perror("msgctl - IPC_RMID failed");
+        exit(EXIT_FAILURE);
+    }
+
+    printf("Message queue removed successfully.\n");
+
+    return 0;
+}