CONNECTAT(2)              FreeBSD 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 the socket s.  When
     passed the special value AT_FDCWD in the fd parameter, the behavior is
     identical to a call to connect(2).  Otherwise, connectat() works 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.

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 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.

FreeBSD 13.1-RELEASE-p6        February 13, 2013       FreeBSD 13.1-RELEASE-p6