listen(3N) UNIX System V listen(3N)
NAME
listen - listen for connections on a socket
SYNOPSIS
int listen(int s, int backlog);
DESCRIPTION
To accept connections, a socket is first created with socket, a backlog
for incoming connections is specified with listen and then the
connections are accepted with accept. The listen call applies only to
sockets of type SOCKSTREAM or SOCKSEQPACKET.
The backlog parameter defines the maximum length the queue of pending
connections may grow to. If a connection request arrives with the queue
full, the client will receive an error with an indication of
ECONNREFUSED.
RETURN VALUE
A 0 return value indicates success; -1 indicates an error.
ERRORS
The call fails if:
EBADF The argument s is not a valid descriptor.
ENOTSOCK The argument s is not a socket.
EOPNOTSUPP The socket is not of a type that supports the
operation listen.
NOTES
There is currently no backlog limit.
10/89 Page 1