CLIENT SERVER IMPLEMENTATION

A message queue program that shows a client server implementation
this is the reciever program using Message Queues

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>

struct my_msg_st {
        long int my_msg_type;
        char some_text[BUFSIZ]; };

int main(void)
{
        int running = 1;
int msgid;
struct my_msg_st some_data;
long int msg_to_recieve = 0;

/* Let us set up the message queue */
msgid = msgget((key_t)1234, 0666 | IPC_CREAT);

if (msgid == -1) {
 perror("msgget failed with error");
 exit(EXIT_FAILURE);
}

/* Then the messages are retrieved from the queue, until an end message is 
* encountered. lastly the message queue is deleted
*/

while(running) {
 if (msgrcv(msgid, (void *)&some_data, BUFSIZ, 
    msg_to_recieve, 0) == -1) {
   perror("msgcrv failed with error");
   exit(EXIT_FAILURE);
 }
 printf("You wrote: %s", some_data.some_text);
 if (strncmp(some_data.some_text, "end", 3) == 0) {
   running = 0;
 }
}

if (msgctl(msgid, IPC_RMID, 0) == -1) {
 perror("msgctl(IPC_RMID) failed");
 exit(EXIT_FAILURE);
}

exit(EXIT_SUCCESS);
}
}