UNLOCKPT(3) Linux Programmer's Manual UNLOCKPT(3)

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.

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

unlockpt() is provided in glibc since version 2.1.

POSIX.1-2001.

grantpt(3), posix_openpt(3), ptsname(3), pts(4), feature_test_macros(7), pty(7)

This page is part of release 3.21 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.

2008-06-14

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