Fail to accept connection
 

I am writing a server-client program, normally the server can accept a client connection using accept(). But I want to see some data structure about the server so I add some code for printing the data structure (which is a 2D array with about hundred entry) before the server begins to create socket, bind , listen and accept.
The create, bind and listen goes all right but accept fail with errno set to EBADF. So what should I do to eliminate the error??? Thx in advance

You should pass accept() a valid socket.

Thx.
My code is like that
listen(listenSockFD, (other needed argument))
on return, listen() gives 0 (ie valid), and listenSockFD is 3 (this is the value I usually get) then
sessionFD = accept(listenSockFD, (other needed argument))
On return, sessionFD = -1 which mean failure
what can I do to ensure the file descriptor valid?

You should have something like: listenSockFD = socket(....)

Thx a lot
I have that but I was just lazy to include it in my last reply.
I'll give more details when I'm back home as the ftp server has been down

Here is an extract from my code
listenSockFD = socket(AF_INET, SOCK_STREAM, 0); // usually 3 is returned
bind(listenSockFD, (struct sockaddr*)&serverAddr, sizeof(serverAddr)); //0 return
listen(listenSockFD, 10); // 0 return
sessionFD = accept(listenSockFD, (struct sockaddr*)&clientAddr, &clientLen);
// return -1, this is where error occur, with errno set to EBADF. Error only occurs if I print a 2D table before creating socket. If I do not print the 2D table, there won't be error

really need to help
thx a lot

Maybe the problem isn't in your socketing code then. Are you running out of bounds with your 2D array perhaps?

thx a lot~
i solve the problem after using bzero() on the address structure and buffer