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notifyd(8) [osx man page]

notifyd(8)						    BSD System Manager's Manual 						notifyd(8)

notifyd -- notification server SYNOPSIS
notifyd [-d service_name] [-v] [-shm_pages npages] [-no_restart] DESCRIPTION
notifyd is the server for the Mac OS X notification system described in notify(3). The server is usually started automatically during system startup, and is not run from the command line. The -d option causes notifyd to run in a debugging mode. It registers its mach port with the given service name. It will stay attached to the terminal and print verbose log messages to the terminal. The -v option causes notifyd to produce verbose logging information. The -shm_pages npages option sets the number of shared memory pages used for passive notification. The default is one page. If a value of zero is specified, shared memory is disabled, and passive notifications are performed using IPC between the client and the server. The -no_restart option causes notifyd to register as a non-restartable server with mach_init. SEE ALSO
notify(3). Mac OS X March 24, 2003 Mac OS X

Check Out this Related Man Page

notifyutil(1)						    BSD General Commands Manual 					     notifyutil(1)

notifyutil -- notification command line utility SYNOPSIS
notifyutil [-q] [-v] [-z msec] [-M] [-R] [command ...] DESCRIPTION
notifyutil is a command-line utility for interacting with the notify(3) notification system and the notifyd(8) server. It may be used to post notifications, detect and report notifications, and to examine and set the state values associated with notification keys. If notifyutil is used to monitor one or more notification keys, it prints the notification key when the corresponding notification is received. The -v (verbose) and -q (quiet) flags, if specified, modify the output behavior. The -v flag causes notifyutil to print a time stamp, the notification key, the current state value for that key, and the type of the notifi- cation (port, file, etc). The -q flag supresses any output except for state values fetched following a -g command. Commands listed in the table below are processed in left to right order from the command line. -p key Post a notification for key. -w key Register for key and wait forever for notifications. -# key Register for key and wait for # (an integer) notifications. E.g. -1 key waits for a single notification. -g key Get state value for key. -s key val Set state value for key. -port Use mach port notifications for subsequent -w or -# registrations. This is the default registration type. -file Use file descriptor notifications for subsequent registrations. -check Use shared memory notifications for subsequent registrations. -signal [#] Use signal notifications for subsequent registrations. Signal 1 (HUP) is the default, but an alternate signal may be specified. -dispatch Use dispatch for subsequent registrations. When invoked with any combination of -w and -# actions, notifyutil registers for notification for the specified key(s). If any key is given with a -w action, notifyutil runs until interrupted with Control-C. If all registrations are invoked with -#, the program continues to run until the corresponding number of notifications for each key have been received. By default, notifyutil uses mach port registration (using notify_register_mach_port()) for keys given with a -w or -# flag. The -file com- mand causes notifyutil to use notify_register_file_descriptor() for any subsequent -w or -# registrations. Similarly, -check causes notifyutil to use notify_register_check() for subsequent registrations, -signal switches to notify_register_signal(), and -dispatch causes it to use notify_register_dispatch() for subsequent registrations. If any registrations are made following the use of the -check command, notifyutil will start a timer and check for shared memory notifica- tions every 100 milliseconds. An alternate timer value may be set following the -z flag. The -M flag causes notifyutil to use multiplex all notifications over a single mach connection with notifyd. Notifications (except shared memory notifications) are received and redistributed by a dispatch handler. The -R flag causes notifyutil to regenerate all its registrations in the unlikely event that notifyd restarts. Note that a notification key and its associated state variable only exist when there are one or more current registrations for that key. Setting the state for a key that has no registrations has no effect. Thus the command notifyutil -s 123 -g will print 0 unless is registered by some other process. However, the command notifyutil -w -s 123 -g prints 123 since the ``-w'' registration ensures the key and its state variable exist before the value is set, and continue to exist when the value is fetched. SEE ALSO
notify(3), notifyd(8) Mac OS X November 4, 2011 Mac OS X
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