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NetBSD 6.1.5 - man page for sockatmark (netbsd section 3)

SOCKATMARK(3)			   BSD Library Functions Manual 		    SOCKATMARK(3)

NAME
     sockatmark -- determine whether a socket is at the out-of-band mark

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <sys/socket.h>

     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)

     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.1'') as a replacement for
     the SIOCATMARK ioctl(2) interface.

BSD					   May 15, 2003 				      BSD


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