- Add a software watchdog facility.

This commit has two pieces. One half is the watchdog kernel code which lives
primarily in hardclock() in sys/kern/kern_clock.c. The other half is a userland
daemon which, when run, will keep the watchdog from firing while the userland
is intact and functioning.

Approved by:	jeff (mentor)

2 files changed, 53 insertions, 2 deletions

diff --git a/etc/rc.d/Makefile b/etc/rc.d/Makefile
index 4104707..734a362 100755
--- a/etc/rc.d/Makefile
+++ b/etc/rc.d/Makefile
@@ -17,8 +17,8 @@ FILES=	DAEMON LOGIN NETWORKING SERVERS abi accounting addswap adjkerntz amd \
 	ntpdate othermta pccard pcvt ppp-user pppoed pwcheck quota random \
 	rarpd rcconf.sh root route6d routed rpcbind rtadvd rwho savecore \
 	securelevel sendmail serial sppp sshd swap1 syscons sysctl \
-	syslogd timed ttys usbd vinum virecover ypbind yppasswdd ypserv \
-	ypset ypupdated ypxfrd
+	syslogd timed ttys usbd vinum virecover watchdogd ypbind \
+	yppasswdd ypserv ypset ypupdated ypxfrd
 FILESDIR=	/etc/rc.d
 FILESMODE=	${BINMODE}
 
diff --git a/etc/rc.d/watchdogd b/etc/rc.d/watchdogd
new file mode 100644
index 0000000..e2ee5f7
--- /dev/null
+++ b/etc/rc.d/watchdogd
@@ -0,0 +1,51 @@
+#!/bin/sh
+
+# Copyright (c) 2003  Sean M. Kelly <smkelly@FreeBSD.org>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+# PROVIDE: watchdogd
+# REQUIRE: DAEMON
+# KEYWORD: FreeBSD
+
+. /etc/rc.subr
+
+name="watchdogd"
+rcvar="`set_rcvar`"
+command="/usr/sbin/${name}"
+start_precmd="watchdogd_precmd"
+pidfile="/var/run/${name}.pid"
+
+watchdogd_precmd()
+{
+	if ! sysctl debug.watchdog >/dev/null 2>&1; then
+		err 1 "Your kernel doesn't have watchdog support."
+	fi
+	return 0
+}
+
+load_rc_config $name
+run_rc_command "$1"