WATCHDOGD(8) FreeBSD System Manager's Manual WATCHDOGD(8)
NAME
watchdogd - watchdog timer retrigger daemon
SYNOPSIS
watchdogd [-dnq] [-i interval] [-p period]
DESCRIPTION
watchdogd is a daemon to activate and periodically retrigger the
watchdog(4) timer device from userland. watchdogd is designed to work in
high load environments, where other methods (such as a shell script
invoking sysctl(8)) would involve too much overhead.
The basic premise is that after every interval seconds, watchdogd resets
the hardware timer to period. See also watchdog(4) for more information
on how watchdog timers work.
The options are as follows:
-d Do not daemonize. If this option is specified, watchdogd will
run in the foreground.
-i interval
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 used.
-n 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 halt(8).
-p period
Set the hardware timer to expire in period seconds. The default
is 30 seconds.
-q Be quiet. With this option specified, watchdogd will not output
a warning message if the underlying hardware adjusted the timeout
period.
SEE ALSO
watchdog(4), sysctl(8)
HISTORY
The watchdogd program first appeared in OpenBSD 3.8.
AUTHORS
watchdogd was written by Marc Balmer <
[email protected]>.
FreeBSD 14.1-RELEASE-p8 July 16, 2013 FreeBSD 14.1-RELEASE-p8