.TH ACCEPT 2X 3/17/82
.UC 4.1a Provisional
.SH NAME
accept \- accept a connection on a socket
.SH SYNOPSIS
.ft B
#include <sys/socket.h>
.sp
accept(s, from)
.br
int s;
.br
struct sockaddr *from;
.ft R
.SH DESCRIPTION
This call is used to
.I accept
a connection on socket
.I s;
.I from
is a result value indicating the address of the entity which
connected, as known to the communications layer.
This call
is used with connection-based socket types, currently with SOCK_STREAM.
.PP
If the underlying communications layer has already made a connection
on the socket, then the call returns immediately.
If no connection has yet been made, and the socket is nonblocking (see
.IR ioctl (2)),
then a \-1 is returned and the global variable errno is set to
EWOULDBLOCK.
It is possible to
.IR select (2x)
a socket for the purposes of doing an
.I accept
by selecting it for read, since no data may be read
until the connection completes.
.SH SEE ALSO
connect(2x), select(2x), socket(2x)
.SH DIAGNOSTICS
Zero is returned if a connection is accepted; \-1 is returned 
in the error cases.  Some important error returned in errno are EOPNOTSUPP if
the socket is not of a type supporting this operation, and EISCONN
if the socket is already connected.
.SH BUGS
This call is provisional, and will exist in a slightly different form in
4.2bsd.