NAME
sockatmark
- determine whether a socket is at the out-of-band mark
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
int
sockatmark(
int s
)
DESCRIPTION
The
sockatmark
function determines whether the socket referenced by the file descriptor
s
is at the out-of-band mark.
RETURN VALUES
If successful, the
sockatmark
function returns 1 to indicate that the socket is at an out-of-band mark;
0 is returned if there is no out-of-band mark or the mark is preceded
by in-band data.
Otherwise, -1 is returned and
errno
is set to indicate the error.
ERRORS
The
sockatmark
function will fail if:
- [
EBADF
] -
The argument
s
is not a valid file descriptor.
- [
ENOTTY
] -
The file descriptor
s
does not refer to a socket.
SEE ALSO
ioctl(2),
recv(2),
socket(2)
(see
/usr/share/doc/psd/20.ipctut
)
(see
/usr/share/doc/psd/21.ipc
)
STANDARDS
The
sockatmark
function conforms to
IEEE Std 1003.1-2001 (``POSIX.1'') .
HISTORY
The
sockatmark
function appeared in
IEEE Std 1003.1g-2000 (``POSIX.1'')
as a replacement for the
SIOCATMARK
ioctl(2)
interface.