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LISTEN(2)							     LISTEN(2)

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:

       [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 ALSO
       accept(2), connect(2), socket(2)

BUGS
       The backlog is currently limited (silently) to 5.

4.2 Berkeley Distribution	 May 14, 1986			     LISTEN(2)
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