freebsd man page for connectat

CONNECTAT(2)						      BSD System Calls Manual						      CONNECTAT(2)

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 indi-
     cate 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.

BSD
								 February 13, 2013							       BSD