xref: /freebsd/libexec/rc/rc.d/dumpon (revision ccc806a049383e5611b3752e6f384cf03a208039)

#!/bin/sh
#
# $FreeBSD$
#

# PROVIDE: dumpon
# BEFORE: disks
# KEYWORD: nojail

. /etc/rc.subr

name="dumpon"
desc="Dump kernel corefiles from swap to disk"
start_cmd="dumpon_start"
stop_cmd="dumpon_stop"

dumpon_try()
{
	local flags

	flags=${dumpon_flags}
	if [ -n "${dumppubkey}" ]; then
		warn "The dumppubkey variable is deprecated.  Use dumpon_flags."
		flags="${flags} -k ${dumppubkey}"
	fi
	/sbin/dumpon ${flags} "${1}"
	if [ $? -eq 0 ]; then
		# Make a symlink in devfs for savecore
		ln -fs "${1}" /dev/dumpdev
		return 0
	fi
	warn "unable to specify $1 as a dump device"
	return 1
}

dumpon_warn_unencrypted()
{
	if [ -n "${dumppubkey}" ]; then
		return
	fi
	for flag in ${dumpon_flags}; do
		if [ $flag = -k ]; then
			return
		fi
	done
	warn "Kernel dumps will be written to the swap partition without encryption."
}

dumpon_start()
{
	# Enable dumpdev so that savecore can see it. Enable it
	# early so a crash early in the boot process can be caught.
	#
	case ${dumpdev} in
	[Nn][Oo])
		;;
	[Aa][Uu][Tt][Oo] | '')
		root_hold_wait
		dev=$(/bin/kenv -q dumpdev)
		if [ -n "${dev}" ] ; then
			dumpon_try "${dev}"
			return $?
		fi
		if [ -z ${dumpdev} ] ; then
			return
		fi
		while read dev mp type more ; do
			[ "${type}" = "swap" ] || continue
			case ${dev} in
			*.bde|*.eli)
				dumpon_warn_unencrypted
				dev=${dev%.*}
				;;
			esac
			[ -c "${dev}" ] || continue
			dumpon_try "${dev}" 2>/dev/null && return 0
		done </etc/fstab
		echo "No suitable dump device was found." 1>&2
		return 1
		;;
	*)
		root_hold_wait
		dumpon_try "${dumpdev}"
		;;
	esac
}

dumpon_stop()
{
	case ${dumpdev} in
	[Nn][Oo])
		;;
	*)
		rm -f /dev/dumpdev
		/sbin/dumpon -v off
		;;
	esac
}

load_rc_config $name
run_rc_command "$1"