freebsd-dev/lib/libc/sys/connectat.2
Baptiste Daroussin 8fbf3d50e3 use .Mt to mark up email addresses consistently (part4)
PR:		191174
Submitted by:	Franco Fichtner  <franco at lastsummer.de>
2014-06-23 08:25:03 +00:00

110 lines
3.1 KiB
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.\" Copyright (c) 2013 The FreeBSD Foundation
.\" All rights reserved.
.\"
.\" This documentation was written by Pawel Jakub Dawidek under sponsorship from
.\" the FreeBSD Foundation.
.\"
.\" 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
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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.\" $FreeBSD$
.\"
.Dd February 13, 2013
.Dt CONNECTAT 2
.Os
.Sh NAME
.Nm connectat
.Nd initiate a connection on a socket
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In sys/types.h
.In sys/socket.h
.Pp
.In fcntl.h
.Ft int
.Fn connectat "int fd" "int s" "const struct sockaddr *name" "socklen_t namelen"
.Sh DESCRIPTION
The
.Fn connectat
system call initiates a connection on a socket.
It works just like the
.Xr connect 2
system call with two exceptions:
.Pp
.Bl -enum -offset indent -compact
.It
It is limited to sockets in the PF_LOCAL domain.
.Pp
.It
If the file path stored in the
.Fa sun_path
field of the sockaddr_un structure is a relative path, it is located relative
to the directory associated with the file descriptor
.Fa fd .
If
.Fn connectat
is passed the special value
.Dv AT_FDCWD
in the
.Fa fd
parameter, the current working directory is used and the behavior is identical
to a call to
.Xr connect 2 .
.El
.Sh RETURN VALUES
.Rv -std connectat
.Sh ERRORS
The
.Fn connectat
system call may fail with the same errors as the
.Xr connect 2
system call for a UNIX domain socket or with the following errors:
.Bl -tag -width Er
.It Bq Er EBADF
The
.Fa sun_path
field does not specify an absolute path and the
.Fa fd
argument is neither
.Dv AT_FDCWD
nor a valid file descriptor.
.It Bq Er ENOTDIR
The
.Fa sun_path
field is not an absolute path and
.Fa fd
is neither
.Dv AT_FDCWD
nor a file descriptor associated with a directory.
.El
.Sh SEE ALSO
.Xr bindat 2 ,
.Xr connect 2 ,
.Xr socket 2 ,
.Xr unix 4
.Sh AUTHORS
The
.Nm
was developed by
.An Pawel Jakub Dawidek Aq Mt pawel@dawidek.net
under sponsorship from the FreeBSD Foundation.