LISTEN(2)LISTEN(2)NAMElisten - 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
willingness to accept incoming connections and a queue limit for
incoming connections are specified with listen(2), and then the
connections are accepted with accept(2). The listen call applies only
to sockets of type SOCK_STREAM or SOCK_SEQPACKET.
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 may receive an error with an indication of
ECONNREFUSED, or, if the underlying protocol supports retransmission,
the request may be ignored so that retries may succeed.
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.
SEE ALSOaccept(2), connect(2), socket(2)BUGS
The backlog is currently limited (silently) to 5.
4.2 Berkeley Distribution May 14, 1986 LISTEN(2)