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
