NAME

       connectat — initiate a connection on a socket

LIBRARY

       Standard C Library (libc, -lc)

SYNOPSIS

       #include <sys/types.h>
       #include <sys/socket.h>

       #include <fcntl.h>

       int
       connectat(int fd, int s, const struct sockaddr *name, socklen_t namelen);

DESCRIPTION

       The connectat() system call initiates a connection on a socket.  It works just like the connect(2) system
       call with two exceptions:

             1.   It is limited to sockets in the PF_LOCAL domain.

             2.   If the file path stored in the sun_path field of the sockaddr_un structure is a relative path,
                  it  is  located  relative  to  the  directory  associated  with  the  file  descriptor fd.  If
                  connectat() is passed the special value AT_FDCWD in the  fd  parameter,  the  current  working
                  directory is used and the behavior is identical to a call to connect(2).

RETURN VALUES

       The  connectat()  function  returns the value 0 if successful; otherwise the value -1 is returned and the
       global variable errno is set to indicate the error.

ERRORS

       The connectat() system call may fail with the same errors as the connect(2) system call for a UNIX domain
       socket or with the following errors:

       [EBADF]            The sun_path field does not specify an absolute path and the fd  argument  is  neither
                          AT_FDCWD nor a valid file descriptor.

       [ENOTDIR]          The  sun_path  field  is  not  an  absolute path and fd is neither AT_FDCWD nor a file
                          descriptor associated with a directory.

SEE ALSO

       bindat(2), connect(2), socket(2), unix(4)

AUTHORS

       The connectat was developed by Pawel Jakub Dawidek <pawel@dawidek.net> under sponsorship from the FreeBSD
       Foundation.

Debian                                          February 13, 2013                                   CONNECTAT(2)