NAME
connectat —
initiate a connection on a
socket
LIBRARY
library “libc”
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
Theconnectat()
system call initiates a connection on a socket. 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:
- It is limited to sockets in the PF_LOCAL domain.
- 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_FDCWDnor a valid file descriptor. - [
ENOTDIR] - The sun_path field is not an absolute path and
fd is neither
AT_FDCWDnor a file descriptor associated with a directory.
SEE ALSO
AUTHORS
The connectat was developed by
Pawel Jakub Dawidek
<pawel@dawidek.net>
under sponsorship from the FreeBSD Foundation.