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

NAME
     watchdogd -- watchdog daemon

SYNOPSIS
     watchdogd [-d] [-e	cmd] [-I file] [-s sleep] [-t timeout]

DESCRIPTION
     The watchdogd utility interfaces with the kernel's	watchdog facility to
     ensure that the system is in a working state.  If watchdogd is unable to
     interface with the	kernel over a specific timeout,	the kernel will	take
     actions to	assist in debugging or restarting the computer.

     If	-e cmd is specified, watchdogd will attempt to execute this command
     with system(3), and only if the command returns with a zero exit code
     will the watchdog be reset.  If -e	cmd is not specified, the daemon will
     perform a trivial file system check instead.

     The -s sleep argument can be used to control the sleep period between
     each execution of the check and defaults to one second.

     The -t timeout specifies the desired timeout period in seconds.  The de-
     fault timeout is 16 seconds.

     One possible circumstance which will cause	a watchdog timeout is an in-
     terrupt storm.  If	this occurs, watchdogd will no longer execute and thus
     the kernel's watchdog routines will take action after a configurable
     timeout.

     Upon receiving the	SIGTERM	or SIGINT signals, watchdogd will first	in-
     struct the	kernel to no longer perform watchdog checks and	then will ter-
     minate.

     The watchdogd utility recognizes the following runtime options:

     -I	file  Write the	process	ID of the watchdogd utility in the specified
	      file.

     -d	      Do not fork.  When this option is	specified, watchdogd will not
	      fork into	the background at startup.

FILES
     /var/run/watchdogd.pid

SEE ALSO
     watchdog(4), watchdog(8), watchdog(9)

HISTORY
     The watchdogd utility appeared in FreeBSD 5.1.

AUTHORS
     The watchdogd utility and manual page were	written	by Sean	Kelly
     <smkelly@FreeBSD.org> and Poul-Henning Kamp <phk@FreeBSD.org>.

     Some contributions	made by	Jeff Roberson <jeff@FreeBSD.org>.

BSD			       September 2, 2006			   BSD

NAME | SYNOPSIS | DESCRIPTION | FILES | SEE ALSO | HISTORY | AUTHORS

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