clnt.c

#include <stdio.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <stdlib.h>
#include <errno.h>
typedef struct our_msgbuf{
	long mtype;
	char buffer[80];
} Message;

int main(){
	Message msg;
	int msgid,key,n,length;
	if(key=ftok("serv",'A') <0){


		printf("Can't obtaint key\n");
		exit(1);
	}
	msg.mtype=1L;
	if(msgid=msgget(key,0)<0){
		printf("Can't access to IPC\n");
		exit(1);
	}
	if((length=sprintf(msg.buffer,"Hello world\n")<0)){

		printf("Error while copying\n");
		exit(1);
	}
	if(msgsnd(msgid,(void*)&msg,length,0)!=0){
		perror("send");
		printf("Error while sending the message\n");
		exit(1);
	}
	if(msgctl(msgid,IPC_RMID,0)<0){
		printf("Error while deleting queue\n");
		exit(1);
	}
	exit(0);
}