osx man page for upsshutdown

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

NAME
     upsshutdown -- UPS emergency low power shutdown script

DESCRIPTION
     upsshutdown is a script that runs automatically when the system performs an emergency UPS low power shutdown.  The script is run before
     shutdown(8) is invoked.  upsshutdown only runs if one of the three shutdown rules is enabled and true: "percentage remaining," "time remain-
     ing," or "time since loss of power."  These settings can be changed using pmset(1) or Energy Saver in System Preferences.

     The system administrator may modify upsshutdown.  The script should only contain commands that must run in the case of an emergency UPS shut-
     down.  It should not contain any commands that would otherwise be executed during a normal shutdown since the normal shutdown procedure fol-
     lows invocation of upsshutdown.

LOCATION
     /usr/libexec/upsshutdown

SEE ALSO
     pmset(1), ioupsd(8)

Darwin								 October 25, 2005							    Darwin