dotlockfile (1)      - Utility to manage lockfiles
getpt (3)            - open the pseudoterminal master (PTM)
grantpt (3)          - grant access to the slave pseudoterminal
Mail::Box::Locker::DotLock (3pm) - lock a folder with a separate file
Mail::Box::Locker::Mutt (3pm) - lock a folder using mutt_dotlock
Mason::Plugin::DollarDot (3pm) - Allow $. as substitution for $self-> and in ...
mutt_dotlock (1)     - Lock mail spool files.
posix_openpt (3)     - open a pseudoterminal device
ptmx (4)             - pseudoterminal master and slave
pts (4)              - pseudoterminal master and slave
ptsname (3)          - get the name of the slave pseudoterminal
ptsname_r (3)        - get the name of the slave pseudoterminal
pty (7)              - pseudoterminal interfaces
unlockpt (3)         - unlock a pseudoterminal master/slave pair