unlockpt — unlock a pseudo-terminal master/slave pair
#define _XOPEN_SOURCE #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.