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-.\" Copyright (c) 1983, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\"    must display the following acknowledgement:
-.\"	This product includes software developed by the University of
-.\"	California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"     @(#)connect.2	8.1 (Berkeley) 6/4/93
-.\"
-.Dd June 4, 1993
-.Dt CONNECT 2
-.Os BSD 4.2
-.Sh NAME
-.Nm connect
-.Nd initiate a connection on a socket
-.Sh SYNOPSIS
-.Fd #include <sys/types.h>
-.Fd #include <sys/socket.h>
-.Ft int
-.Fn connect "int s" "const struct sockaddr *name" "int namelen"
-.Sh DESCRIPTION
-The parameter
-.Fa s
-is a socket.
-If it is of type
-.Dv SOCK_DGRAM ,
-this call specifies the peer with which the socket is to be associated;
-this address is that to which datagrams are to be sent,
-and the only address from which datagrams are to be received.
-If the socket is of type
-.Dv SOCK_STREAM ,
-this call attempts to make a connection to
-another socket.
-The other socket is specified by
-.Fa name ,
-which is an address in the communications space of the socket.
-Each communications space interprets the
-.Fa name
-parameter in its own way.
-Generally, stream sockets may successfully
-.Fn connect
-only once; datagram sockets may use
-.Fn connect
-multiple times to change their association.
-Datagram sockets may dissolve the association
-by connecting to an invalid address, such as a null address.
-.Sh IMPLEMENTATION NOTES
-.Pp
-In the non-threaded library
-.Fn connect
-is implemented as the
-.Va connect
-syscall.
-.Pp
-In the threaded library, the
-.Va connect
-syscall is assembled to
-.Fn _thread_sys_connect
-and
-.Fn connect
-is implemented as a function which locks
-.Va s
-for read and write, then calls
-.Fn _thread_sys_connect .
-If the call to
-.Fn _thread_sys_connect
-would block, a context switch is performed. Before returning,
-.Fn connect
-unlocks
-.Va s .
-.Sh RETURN VALUES
-If the connection or binding succeeds, 0 is returned.
-Otherwise a -1 is returned, and a more specific error
-code is stored in
-.Va errno .
-.Sh ERRORS
-The
-.Fn connect
-call fails if:
-.Bl -tag -width EADDRNOTAVAILABB
-.It Bq Er EBADF
-.Fa s
-is not a valid descriptor.
-.It Bq Er ENOTSOCK
-.Fa s
-is a descriptor for a file, not a socket.
-.It Bq Er EADDRNOTAVAIL
-The specified address is not available on this machine.
-.It Bq Er EAFNOSUPPORT
-Addresses in the specified address family cannot be used with this socket.
-.It Bq Er EISCONN
-The socket is already connected.
-.It Bq Er ETIMEDOUT
-Connection establishment timed out without establishing a connection.
-.It Bq Er ECONNREFUSED
-The attempt to connect was forcefully rejected.
-.It Bq Er ENETUNREACH
-The network isn't reachable from this host.
-.It Bq Er EADDRINUSE
-The address is already in use.
-.It Bq Er EFAULT
-The
-.Fa name
-parameter specifies an area outside
-the process address space.
-.It Bq Er EINPROGRESS
-The socket is non-blocking 
-and the connection cannot
-be completed immediately.
-It is possible to
-.Xr select 2
-for completion by selecting the socket for writing.
-.It Bq Er EALREADY
-The socket is non-blocking
-and a previous connection attempt
-has not yet been completed.
-.El
-.Pp
-The following errors are specific to connecting names in the UNIX domain.
-These errors may not apply in future versions of the UNIX IPC domain.
-.Bl -tag -width EADDRNOTAVAILABB
-.It Bq Er ENOTDIR
-A component of the path prefix is not a directory.
-.It Bq Er ENAMETOOLONG
-A component of a pathname exceeded 255 characters,
-or an entire path name exceeded 1023 characters.
-.It Bq Er ENOENT
-The named socket does not exist.
-.It Bq Er EACCES
-Search permission is denied for a component of the path prefix.
-.It Bq Er EACCES
-Write access to the named socket is denied.
-.It Bq Er ELOOP
-Too many symbolic links were encountered in translating the pathname.
-.El
-.Sh SEE ALSO
-.Xr accept 2 ,
-.Xr getpeername 2 ,
-.Xr getsockname 2 ,
-.Xr select 2 ,
-.Xr socket 2
-.Sh HISTORY
-The
-.Fn connect
-function call appeared in
-.Bx 4.2 .