dumpon revision 298514 
1#!/bin/sh
2#
3# $FreeBSD: head/etc/rc.d/dumpon 298514 2016-04-23 16:10:54Z lme $
4#
5
6# PROVIDE: dumpon
7# REQUIRE: zvol
8# BEFORE: disks
9# KEYWORD: nojail
10
11. /etc/rc.subr
12
13name="dumpon"
14desc="Dump kernel corefiles from swap to disk"
15start_cmd="dumpon_start"
16stop_cmd="dumpon_stop"
17
18dumpon_try()
19{
20	if /sbin/dumpon "${1}" ; then
21		# Make a symlink in devfs for savecore
22		ln -fs "${1}" /dev/dumpdev
23		return 0
24	fi
25	warn "unable to specify $1 as a dump device"
26	return 1
27}
28
29dumpon_start()
30{
31	# Enable dumpdev so that savecore can see it. Enable it
32	# early so a crash early in the boot process can be caught.
33	#
34	case ${dumpdev} in
35	[Nn][Oo] | '')
36		;;
37	[Aa][Uu][Tt][Oo])
38		dev=$(/bin/kenv -q dumpdev)
39		if [ -n "${dev}" ] ; then
40			dumpon_try "${dev}"
41			return $?
42		fi
43		while read dev mp type more ; do
44			[ "${type}" = "swap" ] || continue
45			[ -c "${dev}" ] || continue
46			dumpon_try "${dev}" 2>/dev/null && return 0
47		done </etc/fstab
48		echo "No suitable dump device was found." 1>&2
49		return 1
50		;;
51	*)
52		dumpon_try "${dumpdev}"
53		;;
54	esac
55}
56
57dumpon_stop()
58{
59	case ${dumpdev} in
60	[Nn][Oo] | '')
61		;;
62	*)
63		rm -f /dev/dumpdev
64		/sbin/dumpon -v off
65		;;
66	esac
67}
68
69load_rc_config $name
70run_rc_command "$1"
71