watchdog timer retrigger daemon
is a daemon to activate and periodically
retrigger the watchdog(4)
timer device from userland. watchdogd
to work in high load environments, where other methods (such as a shell script
involve too much overhead.
The basic premise is that after every interval
resets the hardware timer to
. See also
information on how watchdog timers work.
The options are as follows:
- Do not daemonize. If this option is specified,
watchdogd will run in the foreground.
- Specify how often, in seconds,
watchdogd should retrigger the hardware
timer. If no interval is specified, the value of
period (see below) divided by three is
- Do not restore the watchdog to its original values once it
has been activated. With this set, the system will be rebooted by the
watchdog even after a
- Set the hardware timer to expire in
period seconds. The default is 30
- Be quiet. With this option specified,
watchdogd will not output a warning message
if the underlying hardware adjusted the timeout period.
program first appeared in
was written by