listen(3N) LIBRARY FUNCTIONS listen(3N)
NAME
listen - listen for connections on a socket
SYNOPSIS
listen(s, backlog)
int s, backlog;
DESCRIPTION
To accept connections, a socket is first created with
socket(2), a backlog for incoming connections is specified
with listen() and then the connections are accepted with
accept(2). 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 descrip-
tor.
ENOTSOCK The argument s is not a socket.
EOPNOTSUPP The socket is not of a type that sup-
ports the operation listen.
NOTES
There is currently no backlog limit.
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