| UPSSHUTDOWN(8) | System Manager's Manual | UPSSHUTDOWN(8) |
upsshutdown — UPS
emergency low power shutdown script
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 remaining," 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 shutdown. It should not
contain any commands that would otherwise be executed during a normal
shutdown since the normal shutdown procedure follows invocation of
upsshutdown.
/usr/libexec/upsshutdown
| October 25, 2005 | Darwin |