Problem in file and socket fd

Question

Hi
I am using TCP sockets for communication.I create a server which blocks on the accept method to listen for new connections.
The problem is that if I open a file descriptor in the program ,then the server does not block on accept method but instead it reads garbage from the socket.
What could be the possible problem.??
Thanks

Answer 1

hi Here I am sending you a piece of code thaat simply starts a server and opens a file . When I run this ther server does not wait .And if I comment out the line which openss the file it works fine .
<pre>
#include <stdio.h>
#include <strings.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <netdb.h>
#include <sys/uio.h>
#include <arpa/inet.h>
#include <errno.h>
#include <ctype.h>
#include <signal.h>
#include <fcntl.h>
#include <time.h>
#include <sys/timeb.h>
#include <stdlib.h>
#include <stropts.h>
#include <sys/filio.h>
#include <iostream.h>
#include <pthread.h>
#include <plot.h>
#define PORT 8888
#define BACKLOG 10;
int main()
int listenfd ,connfd;
//** if I comment this line server works fine
int fd = open("file",O_RDWR,777);
socklen_t clientlen;
struct sockaddr_in clientaddr;
struct sockaddr_in serveraddr;
listenfd = socket(AF_INET,SOCK_STREAM,0);
serveraddr.sin_family = AF_INET;
serveraddr.sin_addr.s_addr = htonl(INADDR_ANY);
serveraddr.sin_port = htons(8888);
bzero(&(serveraddr.sin_zero), 8);
int n=1;
if (setsockopt (listenfd, SOL_SOCKET, SO_REUSEADDR, (char *)&n, sizeof (n)) <0)
fprintf(stdout,"Error: socket option\n");
close (listenfd);
shutdown(listenfd,2);
bind (listenfd,(sockaddr*) &serveraddr,sizeof(serveraddr));
listen(listenfd,10);
//*** Server Started
printf("Server listening on port 8888 \n");
connfd = accept(listenfd, (sockaddr*)&clientaddr,&clientlen);
printf("Connected accepted \n");
return 0;
</pre>
Thanks