|UNLOCKPT(3)||Linux Programmer's Manual||UNLOCKPT(3)|
NAMEunlockpt - unlock a pseudoterminal master/slave pair
#define _XOPEN_SOURCE /* See feature_test_macros(7) */
int unlockpt(int fd );
DESCRIPTIONThe 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 VALUEWhen 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.
VERSIONSunlockpt() is provided in glibc since version 2.1.
SEE ALSOgrantpt(3), posix_openpt(3), ptsname(3), pts(4), pty(7)
COLOPHONThis page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.