msgrcv() function not returning in client process - message-queue

Question

My program is based on interprocess communication. The client send a filename which the server reads and returns its contents back to the client. The msgsnd() function seems to be working but there is no return to the client function when msgrcv() is invoked to read the files contents.
Here is my client program :
#include<sys/msg.h>
#include<sys/ipc.h>
#include<sys/types.h>
#include<string.h>
#include<stdio.h>
#include<fcntl.h>
#define MSGSIZE 10000
typedef struct
{
long mtype;
char msgtext[MSGSIZE];
} msg_buf;
int main()
{
int msgflag=IPC_CREAT | 0666;
key_t k1, k2;
msg_buf buf;
k1 = 1234;
k2 = 5678;
int msgqid1, msgqid2;
if(msgqid1=msgget(k1,msgflag)<0)
{
printf("\nClient online : the output message queue isn't available. Restart !\n");
return 0;
}
else
{
printf("\nClient online : the output message queue is available.\n Enter the file name : ");
scanf("%s",buf.msgtext);
}
buf.mtype = 1;
if(msgqid2=msgget(k2,msgflag)<0)
printf("\nClient: Input message queue unavailable. Restart !\n");
else
printf("\nClient : Input message queue available \n");
int buf_len = strlen(buf.msgtext)+1;
printf("Client: Sending file name : %s \n",buf.msgtext);
if(msgsnd(msgqid1,&buf,buf_len,IPC_NOWAIT)<0)
{
printf("Client : Error sending file name\n");
return 0;
}
printf("hello\n");
if((msgrcv(msgqid2,&buf,MSGSIZE,2,0))<0)
{
printf("Client : Error Recieving file contents from server\n");return 0;
}
else
{
printf("File Contents from the server as follows :\n ");
fputs(buf.msgtext,stdout);
printf("\n\n");
}
}
Here is my server program:
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<fcntl.h>
#include<sys/types.h>
#include<sys/ipc.h>
#include<sys/msg.h>
#define MSGSIZE 10000
typedef struct msg_buf
{
long mtype;
char msgtext[MSGSIZE];
} msg_buf;
int main()
{
msg_buf buf;
key_t k1, k2;
int filesize, fileread, msgqid1, msgqid2;
k1 = 1234;
k2 = 5678;
int msgflag=IPC_CREAT | 0666;
if((msgqid1=msgget(k1,msgflag))<0)
{
printf("Server Online :Input message queue not available. Restart !\n");
return 0;
}
printf("Server Online :Input message queue available.\n");
if((msgrcv(msgqid1,&buf,MSGSIZE,1,0))<0)
{
printf("Server : Error receiving file name");
return 0;
}
printf("Server : File name %s received. \n",buf.msgtext);
if((msgqid2=msgget(k2,msgflag))<0)
{
printf("Server : Output message queue not available. Restart !\n");
return 0;
}
else
printf("Server Online : Output message queue available.\n");
fileread = open(buf.msgtext,O_RDONLY);
if(fileread<0)
{
printf("Server : File not found,%d \n",fileread);
return 0;
}
buf.mtype = 2;printf("Server : file found\n");
filesize = lseek(fileread,0,2);
lseek(fileread,0,0);
int n = read(fileread,buf.msgtext,filesize);
int buf_len = strlen(buf.msgtext)+1;
fputs(buf.msgtext,stdout);
if(msgsnd(msgqid2,&buf,buf_len,IPC_NOWAIT)>=0)
printf("Server : contents of the file sent to the client\n");
else
{
printf("Server : Error on sending file contents \n");
return 0;
}
}