Section: Linux Programmer's Manual (3)
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unlockpt - unlock a pseudo-terminal master/slave pair
int unlockpt(int fd);
function unlocks the slave pseudo-terminal device
(pty) corresponding to the master pty referred to by
should be called before opening the slave side of a pty.
Otherwise, it returns -1 and sets
argument is not a file descriptor open for writing.
argument is not associated with a master pty.
is provided in glibc since version 2.1.
This page is part of release 3.27 of the Linux
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Time: 19:49:25 GMT, April 27, 2011