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