Copyright (c) 1983 The Regents of the University of California.
All rights reserved.
Redistribution and use in source and binary forms are permitted
provided that the above copyright notice and this paragraph are
duplicated in all such forms and that any documentation,
advertising materials, and other materials related to such
distribution and use acknowledge that the software was developed
by the University of California, Berkeley. The name of the
University may not be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
@(#)listen.2 6.3 (Berkeley) 02/14/89
All rights reserved.
Redistribution and use in source and binary forms are permitted
provided that the above copyright notice and this paragraph are
duplicated in all such forms and that any documentation,
advertising materials, and other materials related to such
distribution and use acknowledge that the software was developed
by the University of California, Berkeley. The name of the
University may not be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
@(#)listen.2 6.3 (Berkeley) 02/14/89
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.