1.\" Copyright (c) 2013 The FreeBSD Foundation 2.\" All rights reserved. 3.\" 4.\" This documentation was written by Pawel Jakub Dawidek under sponsorship from 5.\" the FreeBSD Foundation. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" $FreeBSD$ 29.\" 30.Dd February 13, 2013 31.Dt CONNECTAT 2 32.Os 33.Sh NAME 34.Nm connectat 35.Nd initiate a connection on a socket 36.Sh LIBRARY 37.Lb libc 38.Sh SYNOPSIS 39.In sys/types.h 40.In sys/socket.h 41.Pp 42.In fcntl.h 43.Ft int 44.Fn connectat "int fd" "int s" "const struct sockaddr *name" "socklen_t namelen" 45.Sh DESCRIPTION 46The 47.Fn connectat 48system call initiates a connection on the socket 49.Fa s . 50When passed the special value 51.Dv AT_FDCWD 52in the 53.Fa fd 54parameter, the behavior is identical to a call to 55.Xr connect 2 . 56Otherwise, 57.Fn connectat 58works like the 59.Xr connect 2 60system call with two exceptions: 61.Pp 62.Bl -enum -offset indent -compact 63.It 64It is limited to sockets in the PF_LOCAL domain. 65.Pp 66.It 67If the file path stored in the 68.Fa sun_path 69field of the sockaddr_un structure is a relative path, it is located relative 70to the directory associated with the file descriptor 71.Fa fd . 72.El 73.Sh RETURN VALUES 74.Rv -std connectat 75.Sh ERRORS 76The 77.Fn connectat 78system call may fail with the same errors as the 79.Xr connect 2 80system call or with the following errors: 81.Bl -tag -width Er 82.It Bq Er EBADF 83The 84.Fa sun_path 85field does not specify an absolute path and the 86.Fa fd 87argument is neither 88.Dv AT_FDCWD 89nor a valid file descriptor. 90.It Bq Er ENOTDIR 91The 92.Fa sun_path 93field is not an absolute path and 94.Fa fd 95is neither 96.Dv AT_FDCWD 97nor a file descriptor associated with a directory. 98.El 99.Sh SEE ALSO 100.Xr bindat 2 , 101.Xr connect 2 , 102.Xr socket 2 , 103.Xr unix 4 104.Sh AUTHORS 105The 106.Nm 107was developed by 108.An Pawel Jakub Dawidek Aq Mt [email protected] 109under sponsorship from the FreeBSD Foundation. 110