UNLOCKPT(3) | Linux Programmer's Manual | UNLOCKPT(3) |
unlockpt - unlock a pseudoterminal master/slave pair
#define _XOPEN_SOURCE
#include <stdlib.h>
int unlockpt(int fd);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
unlockpt():
The unlockpt() function unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by fd.
unlockpt() should be called before opening the slave side of a pseudoterminal.
When successful, unlockpt() returns 0. Otherwise, it returns -1 and sets errno appropriately.
unlockpt() is provided in glibc since version 2.1.
For an explanation of the terms used in this section, see attributes(7).
Interface | Attribute | Value |
unlockpt () | Thread safety | MT-Safe |
POSIX.1-2001, POSIX.1-2008.
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2017-07-13 |