x SuSE Linux 13.1-RELEASE x
x SuSE Linux 13.1-RELEASEx
UNLOCKPT(3) Linux Programmer's Manual UNLOCKPT(3)
NAME
unlockpt - unlock a pseudoterminal master/slave pair
SYNOPSIS
#define _XOPEN_SOURCE /* See feature_test_macros(7) */
#include <stdlib.h>
int unlockpt(int fd);
DESCRIPTION
The unlockpt() function unlocks the slave pseudoterminal device corre-
sponding to the master pseudoterminal referred to by fd.
unlockpt() should be called before opening the slave side of a pseu-
doterminal.
RETURN VALUE
When successful, unlockpt() returns 0. Otherwise, it returns -1 and
sets errno appropriately.
ERRORS
EBADF The fd argument is not a file descriptor open for writing.
EINVAL The fd argument is not associated with a master pseudoterminal.
VERSIONS
unlockpt() is provided in glibc since version 2.1.
ATTRIBUTES
Multithreading (see pthreads(7))
The unlockpt() function is thread-safe.
CONFORMING TO
POSIX.1-2001.
SEE ALSO
grantpt(3), posix_openpt(3), ptsname(3), pts(4), pty(7)
COLOPHON
This page is part of release 3.69 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
http://www.kernel.org/doc/man-pages/.
2013-12-09 UNLOCKPT(3)
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