NAMEunlockpt - unlock a pseudo-terminal master/slave pair
SYNOPSIS#define _XOPEN_SOURCE #include <stdlib.h> int unlockpt(int fd);
DESCRIPTIONThe 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.
RETURN VALUEWhen successful, unlockpt() returns 0. Otherwise, it returns -1 and sets errno appropriately.
ERRORSEBADF The fd argument is not a file descriptor open for writing. EINVAL The fd argument is not associated with a master pty.
VERSIONSunlockpt() is provided in glibc since version 2.1.
SEE ALSOgrantpt(3), posix_openpt(3), ptsname(3), pts(4), feature_test_macros(7), pty(7)
COLOPHONThis page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at //www.kernel.org/doc/man-pages/. 2008-06-14 UNLOCKPT(3)