|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 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 4.16 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/.