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 <
[email protected]>
under sponsorship from the FreeBSD Foundation.
FreeBSD 14.1-RELEASE-p8 February 13, 2013 FreeBSD 14.1-RELEASE-p8