listen(3N) 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 descriptor.
ENOTSOCK The argument s is not a socket.
EOPNOTSUPP The socket is not of a type that supports the
operation listen.
NOTES
There is currently no backlog limit.
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