pty(4) - phpMan

forkpty (3)          - terminal utility functions
git-init (1)         - Create an empty Git repository or reinitialize an exis...
git-init-db (1)      - Creates an empty Git repository
openpty (3)          - terminal utility functions
posix_trace_eventset_empty (3p) - manipulate trace event type sets (TRACING)
pty (7)              - pseudoterminal interfaces
rmdir (1)            - remove empty directories
sigemptyset (3)      - POSIX signal set operations.
sigemptyset (3p)     - initialize and empty a signal set
sigisemptyset (3)    - POSIX signal set operations.