Copyright (c) 1983 Regents of the University of California.
All rights reserved. The Berkeley software License Agreement
specifies the terms and conditions for redistribution.
@(#)listen.2 6.2 (Berkeley) 05/14/86
All rights reserved. The Berkeley software License Agreement
specifies the terms and conditions for redistribution.
@(#)listen.2 6.2 (Berkeley) 05/14/86
LISTEN 2 ""
C 5 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 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:
20 [EBADF] The argument s is not a valid descriptor.
20 [ENOTSOCK] The argument s is not a socket.
20 [EOPNOTSUPP] The socket is not of a type that supports the operation listen.
"SEE ALSO"
accept(2), connect(2), socket(2)
BUGS
The
backlog is currently limited (silently) to 5.