|UNLOCKPT(3)||Linux Programmer's Manual||UNLOCKPT(3)|
NAME¶unlockpt - unlock a pseudoterminal master/slave pair
int unlockpt(int fd);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
Glibc 2.23 and earlier: _XOPEN_SOURCE
DESCRIPTION¶The unlockpt() function unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by the file descriptor fd.
unlockpt() should be called before opening the slave side of a pseudoterminal.
RETURN VALUE¶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 pseudoterminal.
VERSIONS¶unlockpt() is provided in glibc since version 2.1.
ATTRIBUTES¶For an explanation of the terms used in this section, see attributes(7).
|unlockpt ()||Thread safety||MT-Safe|
CONFORMING TO¶POSIX.1-2001, POSIX.1-2008.
SEE ALSO¶grantpt(3), posix_openpt(3), ptsname(3), pts(4), pty(7)
COLOPHON¶This page is part of release 5.08 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 https://www.kernel.org/doc/man-pages/.