CentOS 4.8

GNU/Linux	CentOS 4.8	i386
	unlockpt(3)

UNLOCKPT

NAME

unlockpt − unlock a pseudotty master/slave pair

#include <stdlib.h>

int unlockpt(int fd);

The unlockpt() function unlocks the slave pseudo-terminal device (pty) corresponding to the master pty referred to by fd.

unlockpt() should be called before opening the slave side of a pty.

When successful, unlockpt() returns 0. Otherwise, it returns −1 and sets errno appropriately.

	EBADF		The fd argument is not a file descriptor open for writing.
	EINVAL		The fd argument is not associated with a master pty.

POSIX 1003.1-2001.