serv.c

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

int main(){
	Message msg;
	int msgid,key,n;
	if(key=ftok("serv",'A') <0){
		perror("ftok");
		printf("Can't obtaint key\n");
		exit(1);
	}
	msg.mtype=1L;
	if(msgid=msgget(key,0666|IPC_CREAT)<0){
		perror("msgget");
		printf("Can't create IPC\n");
		exit(1);
	}
	printf("%d\n",msgid);
	n=msgrcv(msgid,&msg,sizeof(msg),msg.mtype,0);
	if(n>0){
		if(write(1,msg.buffer,n)!=n){
			printf("Error of output\n");
			exit(1);
		}
	}
	else{
		printf("Error while reading the message\n");
		perror("read");
	}
	exit(0);
}