fuser (1) - identify processes using files or sockets
identify (1) - describes the format and characteristics of one or mor...
inotify (7) - monitoring file system events
inotify_add_watch (2) - add a watch to an initialized inotify instance
inotify_init (2) - initialize an inotify instance
inotify_init1 (2) - initialize an inotify instance
inotify_rm_watch (2) - remove an existing watch from an inotify instance
mq_notify (2) - register for notification when a message is available
mq_notify (3) - register for notification when a message is available
mq_notify (3p) - notify process that a message is available (REALTIME)
spamassassin (1) - extensible email filter used to identify spam
systemd-notify (1) - Notify service manager about start-up completion and o...
timerfd_create (2) - timers that notify via file descriptors
timerfd_gettime (2) - timers that notify via file descriptors
timerfd_settime (2) - timers that notify via file descriptors