Programming

/*Sending Program*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.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];
}


main()
{
        int running=1;
        int msgid;
        char buffer[BUFSIZ];
        struct my_msg_st some_data;

        msgid=msgget((key_t)1234, 0666 | IPC_CREAT);

        if(msgid == -1)
        {
                fprintf(stderr, "msgget failed\n");
                exit(EXIT_FAILURE);
        }

        while(running)
        {
                printf("Enter some text: ");
                fgets(buffer, BUFSIZ, stdin);
                some_data.my_msg_type= 1;
                strcpy(some_data.some_text, buffer);

                if(msgsnd(msgid, (void*)&some_data, BUFSIZ, 0) == -1)
                {
                        fprintf(stderr, "msgsnd failed\n");
                        exit(EXIT_FAILURE);
                }

                if (strncmp(buffer, "end", 3) == 0)
                {
                        running=0;
                }
        }

        exit(EXIT_SUCCESS);
}

/*Receiving program*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.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];
}


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

        msgid=msgget((key_t)1234, 0666 | IPC_CREAT);

        if(msgid == -1)
        {
                fprintf(stderr, "msgget failed\n");
                exit(EXIT_FAILURE);
        }

        while(running)
        {
                if(msgrcv(msgid, (void *)&some_data, BUFSIZ, msg_to_receive, 0) == -1)
                {
                        fprintf(stderr, "msgrcv failed\n");
                        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)
        {
                fprintf(stderr, "msgctl(IPC_RMID) failed\n");
                exit(EXIT_FAILURE);
        }

        exit(EXIT_SUCCESS);
}