mkinitrd-magellan/livecd/linuxrc.sh

#!/bin/sh
# $Id$

# loads given kernel modules
load_kernel_modules()
{
	local type="$1"
	local module
	local args
	
	echo -e "-- Loading ${type} modules:"
	( cat /etc/modules.${type}; echo) | while read module args
	do
		case "${module}" in
			\#*|"") continue ;;
		esac

		if [ -e /lib/${module}.ko ]
		then
			insmod -f /lib/${module}.ko ${args} > /dev/null 2>&1
			[ $? -eq 0 ] && echo -e "--      ${module}"
		fi
	done
	echo
}

# check_drives $devices $fstype
check_drives()
{
	local devices="$1"
	local fs="$2"

	for dev in ${devices}
	do
		mount -t ${fs} ${dev} /sysroot/mnt/cdrom >/dev/null 2>&1
		media_found=$?

		# if mount was ok check if cdid exists
		if [ "${media_found}" -eq 0 ]
		then
			[ -e /sysroot/mnt/cdrom/livecdrootfs.sqsh ] && media_id_ok=$?
			umount /sysroot/mnt/cdrom
	
			if [ "${media_id_ok}" -eq 0 ]
			then
				echo -e "Magellan boot device found."
				BOOT_DEVICE="${dev}"
				FSTYPE="${fs}"
				break
			fi
		fi
	done
}

## some defaults ##
DOSCSI=no
DOUSB=no
DOSATA=yes
DOFB=no
DOPATA=yes
FORCED_ROOTFS=""
INITEXEC="/sbin/init"
BREAK_ENABLED=no
UNIONFS=no
UNIONFS_FILE=""
SYSROOT="/sysroot"
CLOOPMOUNTDIR="${SYSROOT}/mnt/cloop"

## starts here ##

# mount essential filesystems
mount -t proc proc /proc
mount -t sysfs sysfs /sys
if [[ -z $(grep '[[:space:]]/dev[[:space:]]' /proc/mounts | cut -d ' ' -f2) ]]
then
	# many video drivers needed exec access
	fstype=ramfs
	# tmpfs was suggested by Greg Kroah-Hartman
	[[ $(grep '[[:space:]]tmpfs' /proc/filesystems | cut -d $'\t' -f2) = tmpfs ]] && fstype=tmpfs
	# mount devtmpfs if supported
	[[ $(grep '[[:space:]]devtmpfs' /proc/filesystems | cut -d $'\t' -f2) = devtmpfs ]] && fstype=devtmpfs
	mount -t ${fstype} dev /dev -o exec,nosuid,mode=0755,size=10M
fi

# install all busybox applets
busybox --install -s

# silencio
echo 0 > /proc/sys/kernel/printk

# check command line for params
for i in $(cat /proc/cmdline)
do
	case "${i}" in
		doscsi) DOSCSI=yes;;
		noscsi) DOSCSI=no;;
		dousb) DOUSB=yes;;
		nousb) DOUSB=no;;
		dosata) DOSATA=yes ;;
		nosata) DOSATA=no ;;
		dofb) DOFB=yes;;
		nofb) DOFB=no;;
		dopata) DOPATA=yes;;
		nopata) DOPATA=no;;
		rootfs=*) FORCED_ROOTFS="${i#*=}";;
		init=*) INITEXEC="${i#*=}";;
		break) BREAK_ENABLED=yes ;;
		unionfs) UNIONFS=yes;;
		unionfs_file=*) UNIONFS_FILE="${i#*=}";;
		rootdelay=*) ROOTDELAY="${i#*=}";;
		cpufreq.governor=*) CPUFREQ_GOVERNOR="${i#*=}";;
	esac
done

# now load all needed modules
[ "${DOFB}" = "yes" ] && load_kernel_modules "framebuffer"
load_kernel_modules "generic"
[ "${DOPATA}" = "yes" ] && load_kernel_modules "pata"
[ "${DOSCSI}" = "yes" ] && load_kernel_modules "scsi"
[ "${DOUSB}" = "yes" ] && load_kernel_modules "usb"
[ "${DOSATA}" = "yes" ] && load_kernel_modules "sata"

# populate dev
mdev -s
# handle hotplug events properly
echo /sbin/mdev > /proc/sys/kernel/hotplug

# create newroot mount point
mkdir -p ${SYSROOT}
# fake a new filesystem (also needed with an initramfs!!)
mount -t tmpfs tmpfs ${SYSROOT}

mkdir -p ${SYSROOT}/mnt/cdrom
mkdir -p ${SYSROOT}/mnt/cloop
mkdir -p ${SYSROOT}/mnt/magellan


# needed for the usbstick, the timeout maybe to short
if [ "${DOUSB}" = "yes" ]; then
	echo "-- Waiting 8 seconds for possible usb mount ..."
	sleep 8
fi

# respect rootdelay kernel param
if [ ! -z "${ROOTDELAY}" ]; then
	echo "-- Requested a rootdelay of ${ROOTDELAY} seconds ..."
	sleep ${ROOTDELAY}
fi

# respect cpufreq.governor kernel param
if [ ! -z "${CPUFREQ_GOVERNOR}" ];
then
	case "${CPUFREQ_GOVERNOR}" in
		performance|conservative|powersave|ondemand|userspace)
			echo "-- Set ${CPUFREQ_GOVERNOR} as default cpufreq.governor"
			for cpu in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
			do
				echo "${CPUFREQ_GOVERNOR}" > "${cpu}"
			done
			;;
		*)
			echo "-- Unknown cpufreq.governor ${CPUFREQ_GOVERNOR} selected, doing nothing"
			;;
	esac
fi

# searching cdrom with cdid
BOOT_DEVICE=""
FSTYPE=""

echo "Searching for a boot device ..."

# searching usbstick
if [ "${DOUSB}" = "yes" ]; then
	ROOTFS="vfat"
	[[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}"
	check_drives "/dev/sd*" "${ROOTFS}"
	check_drives "/dev/sg*" "${ROOTFS}"
fi

# for cdrom_device in $CDROM_LIST (ide)
ROOTFS="iso9660"
[[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}"
check_drives "/dev/cdroms/*" "${ROOTFS}"
check_drives "/dev/hd*" "${ROOTFS}"

# scsi cdroms
if [ "${DOSCSI}" = "yes" ] || [ "${DOSATA}" = "yes" ]; then
	ROOTFS="iso9660"
	[[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}"
	check_drives "/dev/sr*" "${ROOTFS}"
	check_drives "/dev/sg*" "${ROOTFS}"
	check_drives "/dev/scd*" "${ROOTFS}"
fi

# mount our rootfs from cdrom
if [ "${BOOT_DEVICE}" = "" ]
then
	echo "No Magellan boot CD/USBStick found!!!"
	ash
	exit 1
else
	echo -e "Booting from: $BOOT_DEVICE ..."
	mount -o ro -t "${FSTYPE}" "${BOOT_DEVICE}" ${SYSROOT}/mnt/cdrom >/dev/null 2>&1

	# write our boot_device to /mnt/.bootdev for later use (mtab)
	echo "BOOTDEV=${BOOT_DEVICE}" > ${SYSROOT}/.bootdev
	echo "FSTYPE=${FSTYPE}" >> ${SYSROOT}/.bootdev

	# mount squashfs
	echo -e "Mounting squashfs system image ..."
	echo
	[ ! -e /dev/loop0 ] && mknod /dev/loop0 b 7 0
	mount -o loop,ro -t squashfs ${SYSROOT}/mnt/cdrom/livecdrootfs.sqsh "${CLOOPMOUNTDIR}"

	# mount unionfs if enabled
	if [[ ${UNIONFS} = yes ]]
	then
		echo -e "Mounting writeable cdbuffer (unionfs) ..."
	
		# default setting
		CLOOPMOUNTDIR="${SYSROOT}/mnt/unionfs"
		[[ -z ${UNIONFS_FILE} ]] && UNIONFS_FILE="${SYSROOT}/mnt/cdrom/unionfs"

		[[ ! -d ${SYSROOT}/mnt/unionfs ]] && install -d ${SYSROOT}/mnt/unionfs
		mount -t unionfs dirs=${UNIONFS_FILE}=rw:${SYSROOT}/mnt/cloop=ro ${CLOOPMOUNTDIR}
	fi

	# symlinking cloop rootfs to /mnt as newroot
	cd ${SYSROOT}

	for x in bin sbin lib lib64 boot usr opt
	do
		[ -d ${CLOOPMOUNTDIR}/${x} ] && ln -s ${CLOOPMOUNTDIR#${SYSROOT}}/${x} ${x}
	done
	mkdir -p initrd proc tmp sys var/tmp dev media

	# make ${SYSROOT}/dev/console & /mnt/dev/null
	[ ! -e ${SYSROOT}/dev/console ] && mknod -m 600 ${SYSROOT}/dev/console c 5 1
	[ ! -e ${SYSROOT}/dev/null ] && mknod -m 666 ${SYSROOT}/dev/null c 1 3
	# only to be safe and to have a log channel
	[ ! -e ${SYSROOT}/dev/tty ] && mknod ${SYSROOT}/dev/tty c 5 0
	# busybox needs this one
	[ ! -e ${SYSROOT}/dev/tty5 ] && mknod ${SYSROOT}/dev/tty5 c 4 5

	(cd ${CLOOPMOUNTDIR}; cp -a etc root home var ${SYSROOT})

	# ensure that ${SYSROOT}/linurc exists
	[ ! -e ${SYSROOT}/linuxrc ] && ln -snf ${INITEXEC} ${SYSROOT}/linuxrc

	# ensure the right permissions
	chmod 1777 ${SYSROOT}/tmp
	chmod 1777 ${SYSROOT}/var/tmp
fi

cd /

# unset hotplug event-manager
echo > /proc/sys/kernel/hotplug

# de-silencio
echo 3 > /proc/sys/kernel/printk

if [[ ${BREAK_ENABLED} = yes ]]
then
	echo "-- Break requested, type 'exit' to resume operation ..."
	ash
fi

echo "-- Switching to real sysroot ..."
mount --move /dev ${SYSROOT}/dev
mount --move /sys ${SYSROOT}/sys
mount --move /proc ${SYSROOT}/proc

exec run-init ${SYSROOT} ${INITEXEC} $@ < ${SYSROOT}/dev/console > ${SYSROOT}/dev/console
1	#!/bin/sh
2	# $Id$
3
4	# loads given kernel modules
5	load_kernel_modules()
6	{
7	local type="$1"
8	local module
9	local args
10
11	echo -e "-- Loading ${type} modules:"
12	( cat /etc/modules.${type}; echo) \| while read module args
13	do
14	case "${module}" in
15	\#*\|"") continue ;;
16	esac
17
18	if [ -e /lib/${module}.ko ]
19	then
20	insmod -f /lib/${module}.ko ${args} > /dev/null 2>&1
21	[ $? -eq 0 ] && echo -e "-- ${module}"
22	fi
23	done
24	echo
25	}
26
27	# check_drives $devices $fstype
28	check_drives()
29	{
30	local devices="$1"
31	local fs="$2"
32
33	for dev in ${devices}
34	do
35	mount -t ${fs} ${dev} /sysroot/mnt/cdrom >/dev/null 2>&1
36	media_found=$?
37
38	# if mount was ok check if cdid exists
39	if [ "${media_found}" -eq 0 ]
40	then
41	[ -e /sysroot/mnt/cdrom/livecdrootfs.sqsh ] && media_id_ok=$?
42	umount /sysroot/mnt/cdrom
43
44	if [ "${media_id_ok}" -eq 0 ]
45	then
46	echo -e "Magellan boot device found."
47	BOOT_DEVICE="${dev}"
48	FSTYPE="${fs}"
49	break
50	fi
51	fi
52	done
53	}
54
55	## some defaults ##
56	DOSCSI=no
57	DOUSB=no
58	DOSATA=yes
59	DOFB=no
60	DOPATA=yes
61	FORCED_ROOTFS=""
62	INITEXEC="/sbin/init"
63	BREAK_ENABLED=no
64	UNIONFS=no
65	UNIONFS_FILE=""
66	SYSROOT="/sysroot"
67	CLOOPMOUNTDIR="${SYSROOT}/mnt/cloop"
68
69	## starts here ##
70
71	# mount essential filesystems
72	mount -t proc proc /proc
73	mount -t sysfs sysfs /sys
74	if [[ -z $(grep '[[:space:]]/dev[[:space:]]' /proc/mounts \| cut -d ' ' -f2) ]]
75	then
76	# many video drivers needed exec access
77	fstype=ramfs
78	# tmpfs was suggested by Greg Kroah-Hartman
79	[[ $(grep '[[:space:]]tmpfs' /proc/filesystems \| cut -d $'\t' -f2) = tmpfs ]] && fstype=tmpfs
80	# mount devtmpfs if supported
81	[[ $(grep '[[:space:]]devtmpfs' /proc/filesystems \| cut -d $'\t' -f2) = devtmpfs ]] && fstype=devtmpfs
82	mount -t ${fstype} dev /dev -o exec,nosuid,mode=0755,size=10M
83	fi
84
85	# install all busybox applets
86	busybox --install -s
87
88	# silencio
89	echo 0 > /proc/sys/kernel/printk
90
91	# check command line for params
92	for i in $(cat /proc/cmdline)
93	do
94	case "${i}" in
95	doscsi) DOSCSI=yes;;
96	noscsi) DOSCSI=no;;
97	dousb) DOUSB=yes;;
98	nousb) DOUSB=no;;
99	dosata) DOSATA=yes ;;
100	nosata) DOSATA=no ;;
101	dofb) DOFB=yes;;
102	nofb) DOFB=no;;
103	dopata) DOPATA=yes;;
104	nopata) DOPATA=no;;
105	rootfs=) FORCED_ROOTFS="${i#=}";;
106	init=) INITEXEC="${i#=}";;
107	break) BREAK_ENABLED=yes ;;
108	unionfs) UNIONFS=yes;;
109	unionfs_file=) UNIONFS_FILE="${i#=}";;
110	rootdelay=) ROOTDELAY="${i#=}";;
111	cpufreq.governor=) CPUFREQ_GOVERNOR="${i#=}";;
112	esac
113	done
114
115	# now load all needed modules
116	[ "${DOFB}" = "yes" ] && load_kernel_modules "framebuffer"
117	load_kernel_modules "generic"
118	[ "${DOPATA}" = "yes" ] && load_kernel_modules "pata"
119	[ "${DOSCSI}" = "yes" ] && load_kernel_modules "scsi"
120	[ "${DOUSB}" = "yes" ] && load_kernel_modules "usb"
121	[ "${DOSATA}" = "yes" ] && load_kernel_modules "sata"
122
123	# populate dev
124	mdev -s
125	# handle hotplug events properly
126	echo /sbin/mdev > /proc/sys/kernel/hotplug
127
128	# create newroot mount point
129	mkdir -p ${SYSROOT}
130	# fake a new filesystem (also needed with an initramfs!!)
131	mount -t tmpfs tmpfs ${SYSROOT}
132
133	mkdir -p ${SYSROOT}/mnt/cdrom
134	mkdir -p ${SYSROOT}/mnt/cloop
135	mkdir -p ${SYSROOT}/mnt/magellan
136
137
138	# needed for the usbstick, the timeout maybe to short
139	if [ "${DOUSB}" = "yes" ]; then
140	echo "-- Waiting 8 seconds for possible usb mount ..."
141	sleep 8
142	fi
143
144	# respect rootdelay kernel param
145	if [ ! -z "${ROOTDELAY}" ]; then
146	echo "-- Requested a rootdelay of ${ROOTDELAY} seconds ..."
147	sleep ${ROOTDELAY}
148	fi
149
150	# respect cpufreq.governor kernel param
151	if [ ! -z "${CPUFREQ_GOVERNOR}" ];
152	then
153	case "${CPUFREQ_GOVERNOR}" in
154	performance\|conservative\|powersave\|ondemand\|userspace)
155	echo "-- Set ${CPUFREQ_GOVERNOR} as default cpufreq.governor"
156	for cpu in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
157	do
158	echo "${CPUFREQ_GOVERNOR}" > "${cpu}"
159	done
160	;;
161	*)
162	echo "-- Unknown cpufreq.governor ${CPUFREQ_GOVERNOR} selected, doing nothing"
163	;;
164	esac
165	fi
166
167	# searching cdrom with cdid
168	BOOT_DEVICE=""
169	FSTYPE=""
170
171	echo "Searching for a boot device ..."
172
173	# searching usbstick
174	if [ "${DOUSB}" = "yes" ]; then
175	ROOTFS="vfat"
176	[[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}"
177	check_drives "/dev/sd*" "${ROOTFS}"
178	check_drives "/dev/sg*" "${ROOTFS}"
179	fi
180
181	# for cdrom_device in $CDROM_LIST (ide)
182	ROOTFS="iso9660"
183	[[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}"
184	check_drives "/dev/cdroms/*" "${ROOTFS}"
185	check_drives "/dev/hd*" "${ROOTFS}"
186
187	# scsi cdroms
188	if [ "${DOSCSI}" = "yes" ] \|\| [ "${DOSATA}" = "yes" ]; then
189	ROOTFS="iso9660"
190	[[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}"
191	check_drives "/dev/sr*" "${ROOTFS}"
192	check_drives "/dev/sg*" "${ROOTFS}"
193	check_drives "/dev/scd*" "${ROOTFS}"
194	fi
195
196	# mount our rootfs from cdrom
197	if [ "${BOOT_DEVICE}" = "" ]
198	then
199	echo "No Magellan boot CD/USBStick found!!!"
200	ash
201	exit 1
202	else
203	echo -e "Booting from: $BOOT_DEVICE ..."
204	mount -o ro -t "${FSTYPE}" "${BOOT_DEVICE}" ${SYSROOT}/mnt/cdrom >/dev/null 2>&1
205
206	# write our boot_device to /mnt/.bootdev for later use (mtab)
207	echo "BOOTDEV=${BOOT_DEVICE}" > ${SYSROOT}/.bootdev
208	echo "FSTYPE=${FSTYPE}" >> ${SYSROOT}/.bootdev
209
210	# mount squashfs
211	echo -e "Mounting squashfs system image ..."
212	echo
213	[ ! -e /dev/loop0 ] && mknod /dev/loop0 b 7 0
214	mount -o loop,ro -t squashfs ${SYSROOT}/mnt/cdrom/livecdrootfs.sqsh "${CLOOPMOUNTDIR}"
215
216	# mount unionfs if enabled
217	if [[ ${UNIONFS} = yes ]]
218	then
219	echo -e "Mounting writeable cdbuffer (unionfs) ..."
220
221	# default setting
222	CLOOPMOUNTDIR="${SYSROOT}/mnt/unionfs"
223	[[ -z ${UNIONFS_FILE} ]] && UNIONFS_FILE="${SYSROOT}/mnt/cdrom/unionfs"
224
225	[[ ! -d ${SYSROOT}/mnt/unionfs ]] && install -d ${SYSROOT}/mnt/unionfs
226	mount -t unionfs dirs=${UNIONFS_FILE}=rw:${SYSROOT}/mnt/cloop=ro ${CLOOPMOUNTDIR}
227	fi
228
229	# symlinking cloop rootfs to /mnt as newroot
230	cd ${SYSROOT}
231
232	for x in bin sbin lib lib64 boot usr opt
233	do
234	[ -d ${CLOOPMOUNTDIR}/${x} ] && ln -s ${CLOOPMOUNTDIR#${SYSROOT}}/${x} ${x}
235	done
236	mkdir -p initrd proc tmp sys var/tmp dev media
237
238	# make ${SYSROOT}/dev/console & /mnt/dev/null
239	[ ! -e ${SYSROOT}/dev/console ] && mknod -m 600 ${SYSROOT}/dev/console c 5 1
240	[ ! -e ${SYSROOT}/dev/null ] && mknod -m 666 ${SYSROOT}/dev/null c 1 3
241	# only to be safe and to have a log channel
242	[ ! -e ${SYSROOT}/dev/tty ] && mknod ${SYSROOT}/dev/tty c 5 0
243	# busybox needs this one
244	[ ! -e ${SYSROOT}/dev/tty5 ] && mknod ${SYSROOT}/dev/tty5 c 4 5
245
246	(cd ${CLOOPMOUNTDIR}; cp -a etc root home var ${SYSROOT})
247
248	# ensure that ${SYSROOT}/linurc exists
249	[ ! -e ${SYSROOT}/linuxrc ] && ln -snf ${INITEXEC} ${SYSROOT}/linuxrc
250
251	# ensure the right permissions
252	chmod 1777 ${SYSROOT}/tmp
253	chmod 1777 ${SYSROOT}/var/tmp
254	fi
255
256	cd /
257
258	# unset hotplug event-manager
259	echo > /proc/sys/kernel/hotplug
260
261	# de-silencio
262	echo 3 > /proc/sys/kernel/printk
263
264	if [[ ${BREAK_ENABLED} = yes ]]
265	then
266	echo "-- Break requested, type 'exit' to resume operation ..."
267	ash
268	fi
269
270	echo "-- Switching to real sysroot ..."
271	mount --move /dev ${SYSROOT}/dev
272	mount --move /sys ${SYSROOT}/sys
273	mount --move /proc ${SYSROOT}/proc
274
275	exec run-init ${SYSROOT} ${INITEXEC} $@ < ${SYSROOT}/dev/console > ${SYSROOT}/dev/console