NAME
unlockpt - unlock a pseudo-terminal master/slave pair
SYNOPSIS
#define _XOPEN_SOURCE
#include <stdlib.h>
I int unlockpt(int fd );
DESCRIPTION
The
R unlockpt ()
function unlocks the slave pseudo-terminal device
(pty) corresponding to the master pty referred to by
R fd .
R unlockpt ()
should be called before opening the slave side of a pty.
RETURN VALUE
When successful,
R unlockpt ()
returns 0.
Otherwise, it returns -1 and sets
errno
appropriately.
ERRORS
EBADF
The
fd
argument is not a file descriptor open for writing.
EINVAL
The
fd
argument is not associated with a master pty.
CONFORMING TO
POSIX.1-2001.
SEE ALSO
ČLÁNKY DO MAILU