trunk/busybox/mdev.rc

#!/bin/sh
# $Header: /root/magellan-cvs/src/busybox/mdev.rc,v 1.1 2010-08-22 16:43:06 niro Exp $

seed_dev()
{
	# seed /dev with some things that we know we need
	rc_print "  Seeding /dev with needed nodes ..."
	(
		[ ! -c /dev/console ] && mknod /dev/console c 5 1
		[ ! -c /dev/tty1 ] && mknod /dev/tty1 c 4 1
		[ ! -c /dev/null ] && mknod /dev/null c 1 3

		# create kmsg too, so udev can add its start-message to dmesg
		[ -c /dev/kmsg ] || mknod -m 660 /dev/kmsg c 1 11

		# copy over any persistant things
		if [[ -d /lib/udev/devices ]]
		then
			cp -RPp /lib/udev/devices/* /dev 2>/dev/null
		fi

		# not provided by sysfs but needed
		ln -snf /proc/self/fd /dev/fd
		ln -snf fd/0 /dev/stdin
		ln -snf fd/1 /dev/stdout
		ln -snf fd/2 /dev/stderr
		[[ -e /proc/kcore ]] && ln -snf /proc/kcore /dev/core

		# create problematic directories
		mkdir -p /dev/pts /dev/shm
	)
	evaluate_retval
}

# This works for 2.6.15 kernels or greater
trigger_uevents()
{
	local list=""
	local i
	local first
	local last
	local default

	# if you want real coldplug (with all modules being loaded for all
	# devices in the system), uncomment out the next line.
	list="${lis}t $(echo /sys/bus/*/devices/*/uevent)"
	list="${list} $(echo /sys/class/*/*/uevent)"
	list="${list} $(echo /sys/block/*/uevent /sys/block/*/*/uevent)"
	for i in ${list}
	do
		case "${i}" in
			*/device/uevent)
				# skip followed device symlinks
				continue
				;;
			*/class/mem/*|*/class/tty/*)
				first="${first} ${i}"
				;;
			*/block/md*)
				last="${last} ${i}"
				;;
			*/*)
				default="${default} ${i}"
				;;
		esac
	done

	# trigger the sorted events
	for i in ${first} ${default} ${last}
	do
		echo "add" > "${i}"
	done
}

# main functions
start_devicemanager()
{
	# create a ramdisk for populating mdev
	rc_print "Mounting mdev at /dev ..."
	# many video drivers needed exec access
	fstype=ramfs
	# tmpfs was suggested by Greg Kroah-Hartman
	kernel_supports_fs tmpfs && fstype=tmpfs
	# mount devtmpfs if supported
	kernel_supports_fs devtmpfs && fstype=devtmpfs
	mount -n -t ${fstype} mdev /dev -o exec,nosuid,mode=0755,size=1024
	evaluate_retval

	# other eeded device nodes with udev
	seed_dev

	if [ -e /proc/sys/kernel/hotplug ]
	then
		rc_print "  Using mdev for hotplug events ..."
		echo "/sbin/mdev" > /proc/sys/kernel/hotplug
		evaluate_retval
	else
		rc_print ${COLYELLOW}"  Kernel was not compiled with hotplug support !"
		print_status failure
	fi

	# load unix domain sockets if built as module
	if [ -e /proc/modules ]
	then
		modprobe -q unix 2>/dev/null
	fi

	rc_print "  Populating /dev with existing devices through uevents ..."
	trigger_uevents

	rc_print "  Starting mdev ..."
	/sbin/mdev -s
	evaluate_retval

	# same thing as /dev/.devfsd
	touch /dev/.mdev
}

stop_devicemanager()
{
	return 0
}
1	#!/bin/sh
2	# $Header: /root/magellan-cvs/src/busybox/mdev.rc,v 1.1 2010-08-22 16:43:06 niro Exp $
3
4	seed_dev()
5	{
6	# seed /dev with some things that we know we need
7	rc_print " Seeding /dev with needed nodes ..."
8	(
9	[ ! -c /dev/console ] && mknod /dev/console c 5 1
10	[ ! -c /dev/tty1 ] && mknod /dev/tty1 c 4 1
11	[ ! -c /dev/null ] && mknod /dev/null c 1 3
12
13	# create kmsg too, so udev can add its start-message to dmesg
14	[ -c /dev/kmsg ] \|\| mknod -m 660 /dev/kmsg c 1 11
15
16	# copy over any persistant things
17	if [[ -d /lib/udev/devices ]]
18	then
19	cp -RPp /lib/udev/devices/* /dev 2>/dev/null
20	fi
21
22	# not provided by sysfs but needed
23	ln -snf /proc/self/fd /dev/fd
24	ln -snf fd/0 /dev/stdin
25	ln -snf fd/1 /dev/stdout
26	ln -snf fd/2 /dev/stderr
27	[[ -e /proc/kcore ]] && ln -snf /proc/kcore /dev/core
28
29	# create problematic directories
30	mkdir -p /dev/pts /dev/shm
31	)
32	evaluate_retval
33	}
34
35	# This works for 2.6.15 kernels or greater
36	trigger_uevents()
37	{
38	local list=""
39	local i
40	local first
41	local last
42	local default
43
44	# if you want real coldplug (with all modules being loaded for all
45	# devices in the system), uncomment out the next line.
46	list="${lis}t $(echo /sys/bus//devices//uevent)"
47	list="${list} $(echo /sys/class///uevent)"
48	list="${list} $(echo /sys/block//uevent /sys/block//*/uevent)"
49	for i in ${list}
50	do
51	case "${i}" in
52	*/device/uevent)
53	# skip followed device symlinks
54	continue
55	;;
56	/class/mem/\|/class/tty/)
57	first="${first} ${i}"
58	;;
59	/block/md)
60	last="${last} ${i}"
61	;;
62	/)
63	default="${default} ${i}"
64	;;
65	esac
66	done
67
68	# trigger the sorted events
69	for i in ${first} ${default} ${last}
70	do
71	echo "add" > "${i}"
72	done
73	}
74
75	# main functions
76	start_devicemanager()
77	{
78	# create a ramdisk for populating mdev
79	rc_print "Mounting mdev at /dev ..."
80	# many video drivers needed exec access
81	fstype=ramfs
82	# tmpfs was suggested by Greg Kroah-Hartman
83	kernel_supports_fs tmpfs && fstype=tmpfs
84	# mount devtmpfs if supported
85	kernel_supports_fs devtmpfs && fstype=devtmpfs
86	mount -n -t ${fstype} mdev /dev -o exec,nosuid,mode=0755,size=1024
87	evaluate_retval
88
89	# other eeded device nodes with udev
90	seed_dev
91
92	if [ -e /proc/sys/kernel/hotplug ]
93	then
94	rc_print " Using mdev for hotplug events ..."
95	echo "/sbin/mdev" > /proc/sys/kernel/hotplug
96	evaluate_retval
97	else
98	rc_print ${COLYELLOW}" Kernel was not compiled with hotplug support !"
99	print_status failure
100	fi
101
102	# load unix domain sockets if built as module
103	if [ -e /proc/modules ]
104	then
105	modprobe -q unix 2>/dev/null
106	fi
107
108	rc_print " Populating /dev with existing devices through uevents ..."
109	trigger_uevents
110
111	rc_print " Starting mdev ..."
112	/sbin/mdev -s
113	evaluate_retval
114
115	# same thing as /dev/.devfsd
116	touch /dev/.mdev
117	}
118
119	stop_devicemanager()
120	{
121	return 0
122	}