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=""
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#*=}";;
	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

# 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 ${CLOOPMOUNTDIR/\/sysroot\//}/${x} ] && ln -s ${CLOOPMOUNTDIR/\/sysroot\//}/${x} ${x}
	done
	mkdir -p initrd proc tmp sys var/tmp dev media

	# use devtmpfs if supported
	if [ "$(grep devtmpfs /proc/filesystems | cut -d$'\t' -f2)" = "devtmpfs" ]
	then
		mount -t devtmpfs dev /sysroot/dev
	else
		# 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
	fi

	(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 ..."
umount /dev
umount /sys
umount /proc

exec run-init /sysroot ${INITEXEC} $@ </sysroot/dev/console >/sysroot/dev/console
1	niro	532	#!/bin/sh
2	niro	809	# $Id$
3	niro	532
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	niro	663	FSTYPE="${fs}"
49	niro	532	break
50			fi
51			fi
52			done
53			}
54
55			## some defaults ##
56			DOSCSI=no
57			DOUSB=no
58	niro	894	DOSATA=yes
59	niro	663	DOFB=no
60	niro	894	DOPATA=yes
61	niro	663	FORCED_ROOTFS=""
62	niro	1180	INITEXEC="/sbin/init"
63	niro	1188	BREAK_ENABLED=no
64	niro	1296	UNIONFS=no
65			UNIONFS_FILE=""
66			CLOOPMOUNTDIR="/sysroot/mnt/cloop"
67	niro	532
68			## starts here ##
69
70			# mount essential filesystems
71			mount -t proc proc /proc
72			mount -t sysfs sysfs /sys
73	niro	1792	if [[ -z $(grep '[[:space:]]/dev[[:space:]]' /proc/mounts \| cut -d ' ' -f2) ]]
74			then
75			# many video drivers needed exec access
76			fstype=ramfs
77			# tmpfs was suggested by Greg Kroah-Hartman
78			[[ $(grep '[[:space:]]tmpfs' /proc/filesystems \| cut -d $'\t' -f2) = tmpfs ]] && fstype=tmpfs
79			# mount devtmpfs if supported
80			[[ $(grep '[[:space:]]devtmpfs' /proc/filesystems \| cut -d $'\t' -f2) = devtmpfs ]] && fstype=devtmpfs
81			mount -t ${fstype} dev /dev -o exec,nosuid,mode=0755,size=10M
82			fi
83	niro	532
84	niro	894	# install all busybox applets
85			busybox --install -s
86
87	niro	532	# silencio
88			echo 0 > /proc/sys/kernel/printk
89
90			# check command line for params
91			for i in $(cat /proc/cmdline)
92			do
93			case "${i}" in
94	niro	894	doscsi) DOSCSI=yes;;
95			noscsi) DOSCSI=no;;
96			dousb) DOUSB=yes;;
97			nousb) DOUSB=no;;
98			dosata) DOSATA=yes ;;
99			nosata) DOSATA=no ;;
100			dofb) DOFB=yes;;
101			nofb) DOFB=no;;
102			dopata) DOPATA=yes;;
103			nopata) DOPATA=no;;
104			rootfs=) FORCED_ROOTFS="${i#=}";;
105	niro	1180	init=) INITEXEC="${i#=}";;
106	niro	1188	break) BREAK_ENABLED=yes ;;
107	niro	1296	unionfs) UNIONFS=yes;;
108			unionfs_file=) UNIONFS_FILE="${i#=}";;
109	niro	1513	rootdelay=) ROOTDELAY="${i#=}";;
110	niro	532	esac
111			done
112
113			# now load all needed modules
114	niro	671	[ "${DOFB}" = "yes" ] && load_kernel_modules "framebuffer"
115	niro	532	load_kernel_modules "generic"
116	niro	673	[ "${DOPATA}" = "yes" ] && load_kernel_modules "pata"
117	niro	532	[ "${DOSCSI}" = "yes" ] && load_kernel_modules "scsi"
118			[ "${DOUSB}" = "yes" ] && load_kernel_modules "usb"
119			[ "${DOSATA}" = "yes" ] && load_kernel_modules "sata"
120
121	niro	894	# populate dev
122			mdev -s
123			# handle hotplug events properly
124			echo /sbin/mdev > /proc/sys/kernel/hotplug
125
126	niro	532	# create newroot mount point
127			mkdir -p /sysroot
128			# fake a new filesystem (also needed with an initramfs!!)
129			mount -t tmpfs tmpfs /sysroot
130
131			mkdir -p /sysroot/mnt/cdrom
132			mkdir -p /sysroot/mnt/cloop
133			mkdir -p /sysroot/mnt/magellan
134
135
136			# needed for the usbstick, the timeout maybe to short
137			if [ "${DOUSB}" = "yes" ]; then
138			echo "-- Waiting 8 seconds for possible usb mount ..."
139			sleep 8
140			fi
141
142	niro	1513	# respect rootdelay kernel param
143			if [ ! -z "${ROOTDELAY}" ]; then
144			echo "-- Requested a rootdelay of ${ROOTDELAY} seconds ..."
145			sleep ${ROOTDELAY}
146			fi
147
148	niro	532	# searching cdrom with cdid
149			BOOT_DEVICE=""
150			FSTYPE=""
151
152			echo "Searching for a boot device ..."
153
154			# searching usbstick
155			if [ "${DOUSB}" = "yes" ]; then
156	niro	663	ROOTFS="vfat"
157	niro	706	[[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}"
158	niro	663	check_drives "/dev/sd*" "${ROOTFS}"
159			check_drives "/dev/sg*" "${ROOTFS}"
160	niro	532	fi
161
162			# for cdrom_device in $CDROM_LIST (ide)
163	niro	663	ROOTFS="iso9660"
164	niro	706	[[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}"
165	niro	663	check_drives "/dev/cdroms/*" "${ROOTFS}"
166			check_drives "/dev/hd*" "${ROOTFS}"
167	niro	532
168			# scsi cdroms
169			if [ "${DOSCSI}" = "yes" ] \|\| [ "${DOSATA}" = "yes" ]; then
170	niro	663	ROOTFS="iso9660"
171	niro	706	[[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}"
172	niro	663	check_drives "/dev/sr*" "${ROOTFS}"
173			check_drives "/dev/sg*" "${ROOTFS}"
174			check_drives "/dev/scd*" "${ROOTFS}"
175	niro	532	fi
176
177			# mount our rootfs from cdrom
178			if [ "${BOOT_DEVICE}" = "" ]
179			then
180			echo "No Magellan boot CD/USBStick found!!!"
181			ash
182			exit 1
183			else
184			echo -e "Booting from: $BOOT_DEVICE ..."
185			mount -o ro -t "${FSTYPE}" "${BOOT_DEVICE}" /sysroot/mnt/cdrom >/dev/null 2>&1
186
187			# write our boot_device to /mnt/.bootdev for later use (mtab)
188			echo "BOOTDEV=${BOOT_DEVICE}" > /sysroot/.bootdev
189			echo "FSTYPE=${FSTYPE}" >> /sysroot/.bootdev
190
191			# mount squashfs
192			echo -e "Mounting squashfs system image ..."
193			echo
194			[ ! -e /dev/loop0 ] && mknod /dev/loop0 b 7 0
195	niro	1296	mount -o loop,ro -t squashfs /sysroot/mnt/cdrom/livecdrootfs.sqsh "${CLOOPMOUNTDIR}"
196	niro	532
197	niro	1296	# mount unionfs if enabled
198			if [[ ${UNIONFS} = yes ]]
199			then
200			echo -e "Mounting writeable cdbuffer (unionfs) ..."
201
202			# default setting
203			CLOOPMOUNTDIR="/sysroot/mnt/unionfs"
204			[[ -z ${UNIONFS_FILE} ]] && UNIONFS_FILE="/sysroot/mnt/cdrom/unionfs"
205
206			[[ ! -d /sysroot/mnt/unionfs ]] && install -d /sysroot/mnt/unionfs
207			mount -t unionfs dirs=${UNIONFS_FILE}=rw:/sysroot/mnt/cloop=ro ${CLOOPMOUNTDIR}
208			fi
209
210	niro	532	# symlinking cloop rootfs to /mnt as newroot
211			cd /sysroot
212
213	niro	605	for x in bin sbin lib lib64 boot usr opt
214	niro	532	do
215	niro	1296	[ -d ${CLOOPMOUNTDIR/\/sysroot\//}/${x} ] && ln -s ${CLOOPMOUNTDIR/\/sysroot\//}/${x} ${x}
216	niro	532	done
217			mkdir -p initrd proc tmp sys var/tmp dev media
218
219	niro	1514	# use devtmpfs if supported
220			if [ "$(grep devtmpfs /proc/filesystems \| cut -d$'\t' -f2)" = "devtmpfs" ]
221			then
222			mount -t devtmpfs dev /sysroot/dev
223			else
224			# make /sysroot/dev/console & /mnt/dev/null
225			[ ! -e /sysroot/dev/console ] && mknod -m 600 /sysroot/dev/console c 5 1
226			[ ! -e /sysroot/dev/null ] && mknod -m 666 /sysroot/dev/null c 1 3
227			# only to be safe and to have a log channel
228			[ ! -e /sysroot/dev/tty ] && mknod /sysroot/dev/tty c 5 0
229			# busybox needs this one
230			[ ! -e /sysroot/dev/tty5 ] && mknod /sysroot/dev/tty5 c 4 5
231			fi
232	niro	532
233	niro	1296	(cd ${CLOOPMOUNTDIR}; cp -a etc root home var /sysroot)
234	niro	532
235	niro	1512	# ensure that /sysroot/linurc exists
236			[ ! -e /sysroot/linuxrc ] && ln -snf ${INITEXEC} /sysroot/linuxrc
237
238	niro	532	# ensure the right permissions
239			chmod 1777 /sysroot/tmp
240			chmod 1777 /sysroot/var/tmp
241			fi
242
243			cd /
244
245	niro	894	# unset hotplug event-manager
246			echo > /proc/sys/kernel/hotplug
247
248	niro	532	# de-silencio
249			echo 3 > /proc/sys/kernel/printk
250
251	niro	1188	if [[ ${BREAK_ENABLED} = yes ]]
252			then
253			echo "-- Break requested, type 'exit' to resume operation ..."
254			ash
255			fi
256
257	niro	532	echo "-- Switching to real sysroot ..."
258	niro	894	umount /dev
259	niro	532	umount /sys
260			umount /proc
261
262	niro	1180	exec run-init /sysroot ${INITEXEC} $@ </sysroot/dev/console >/sysroot/dev/console