NAME
sockatmark
—
determine whether a socket is at the
out-of-band mark
LIBRARY
library “libc”
SYNOPSIS
#include
<sys/socket.h>
int
sockatmark
(int
s);
DESCRIPTION
Thesockatmark
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
Stuart Sechrest, An Introductory 4.4BSD Interprocess Communication Tutorial. (see /usr/share/doc/psd/20.ipctut)
Samuel J. Leffler, Robert S. Fabry, William N. Joy, Phil Lapsley, Steve Miller, and Chris Torek, Advanced 4.4BSD IPC Tutorial. (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.1g”) as
a replacement for the SIOCATMARK
ioctl(2) interface.