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
mount -t tmpfs tmpfs /dev -o rw,mode=0644,size=1024

# 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#*=}";;
	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

# 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

	# 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 ..."
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	894	mount -t tmpfs tmpfs /dev -o rw,mode=0644,size=1024
74	niro	532
75	niro	894	# install all busybox applets
76			busybox --install -s
77
78	niro	532	# silencio
79			echo 0 > /proc/sys/kernel/printk
80
81			# check command line for params
82			for i in $(cat /proc/cmdline)
83			do
84			case "${i}" in
85	niro	894	doscsi) DOSCSI=yes;;
86			noscsi) DOSCSI=no;;
87			dousb) DOUSB=yes;;
88			nousb) DOUSB=no;;
89			dosata) DOSATA=yes ;;
90			nosata) DOSATA=no ;;
91			dofb) DOFB=yes;;
92			nofb) DOFB=no;;
93			dopata) DOPATA=yes;;
94			nopata) DOPATA=no;;
95			rootfs=) FORCED_ROOTFS="${i#=}";;
96	niro	1180	init=) INITEXEC="${i#=}";;
97	niro	1188	break) BREAK_ENABLED=yes ;;
98	niro	1296	unionfs) UNIONFS=yes;;
99			unionfs_file=) UNIONFS_FILE="${i#=}";;
100	niro	532	esac
101			done
102
103			# now load all needed modules
104	niro	671	[ "${DOFB}" = "yes" ] && load_kernel_modules "framebuffer"
105	niro	532	load_kernel_modules "generic"
106	niro	673	[ "${DOPATA}" = "yes" ] && load_kernel_modules "pata"
107	niro	532	[ "${DOSCSI}" = "yes" ] && load_kernel_modules "scsi"
108			[ "${DOUSB}" = "yes" ] && load_kernel_modules "usb"
109			[ "${DOSATA}" = "yes" ] && load_kernel_modules "sata"
110
111	niro	894	# populate dev
112			mdev -s
113			# handle hotplug events properly
114			echo /sbin/mdev > /proc/sys/kernel/hotplug
115
116	niro	532	# create newroot mount point
117			mkdir -p /sysroot
118			# fake a new filesystem (also needed with an initramfs!!)
119			mount -t tmpfs tmpfs /sysroot
120
121			mkdir -p /sysroot/mnt/cdrom
122			mkdir -p /sysroot/mnt/cloop
123			mkdir -p /sysroot/mnt/magellan
124
125
126			# needed for the usbstick, the timeout maybe to short
127			if [ "${DOUSB}" = "yes" ]; then
128			echo "-- Waiting 8 seconds for possible usb mount ..."
129			sleep 8
130			fi
131
132			# searching cdrom with cdid
133			BOOT_DEVICE=""
134			FSTYPE=""
135
136			echo "Searching for a boot device ..."
137
138			# searching usbstick
139			if [ "${DOUSB}" = "yes" ]; then
140	niro	663	ROOTFS="vfat"
141	niro	706	[[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}"
142	niro	663	check_drives "/dev/sd*" "${ROOTFS}"
143			check_drives "/dev/sg*" "${ROOTFS}"
144	niro	532	fi
145
146			# for cdrom_device in $CDROM_LIST (ide)
147	niro	663	ROOTFS="iso9660"
148	niro	706	[[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}"
149	niro	663	check_drives "/dev/cdroms/*" "${ROOTFS}"
150			check_drives "/dev/hd*" "${ROOTFS}"
151	niro	532
152			# scsi cdroms
153			if [ "${DOSCSI}" = "yes" ] \|\| [ "${DOSATA}" = "yes" ]; then
154	niro	663	ROOTFS="iso9660"
155	niro	706	[[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}"
156	niro	663	check_drives "/dev/sr*" "${ROOTFS}"
157			check_drives "/dev/sg*" "${ROOTFS}"
158			check_drives "/dev/scd*" "${ROOTFS}"
159	niro	532	fi
160
161			# mount our rootfs from cdrom
162			if [ "${BOOT_DEVICE}" = "" ]
163			then
164			echo "No Magellan boot CD/USBStick found!!!"
165			ash
166			exit 1
167			else
168			echo -e "Booting from: $BOOT_DEVICE ..."
169			mount -o ro -t "${FSTYPE}" "${BOOT_DEVICE}" /sysroot/mnt/cdrom >/dev/null 2>&1
170
171			# write our boot_device to /mnt/.bootdev for later use (mtab)
172			echo "BOOTDEV=${BOOT_DEVICE}" > /sysroot/.bootdev
173			echo "FSTYPE=${FSTYPE}" >> /sysroot/.bootdev
174
175			# mount squashfs
176			echo -e "Mounting squashfs system image ..."
177			echo
178			[ ! -e /dev/loop0 ] && mknod /dev/loop0 b 7 0
179	niro	1296	mount -o loop,ro -t squashfs /sysroot/mnt/cdrom/livecdrootfs.sqsh "${CLOOPMOUNTDIR}"
180	niro	532
181	niro	1296	# mount unionfs if enabled
182			if [[ ${UNIONFS} = yes ]]
183			then
184			echo -e "Mounting writeable cdbuffer (unionfs) ..."
185
186			# default setting
187			CLOOPMOUNTDIR="/sysroot/mnt/unionfs"
188			[[ -z ${UNIONFS_FILE} ]] && UNIONFS_FILE="/sysroot/mnt/cdrom/unionfs"
189
190			[[ ! -d /sysroot/mnt/unionfs ]] && install -d /sysroot/mnt/unionfs
191			mount -t unionfs dirs=${UNIONFS_FILE}=rw:/sysroot/mnt/cloop=ro ${CLOOPMOUNTDIR}
192			fi
193
194	niro	532	# symlinking cloop rootfs to /mnt as newroot
195			cd /sysroot
196
197	niro	605	for x in bin sbin lib lib64 boot usr opt
198	niro	532	do
199	niro	1296	[ -d ${CLOOPMOUNTDIR/\/sysroot\//}/${x} ] && ln -s ${CLOOPMOUNTDIR/\/sysroot\//}/${x} ${x}
200	niro	532	done
201			mkdir -p initrd proc tmp sys var/tmp dev media
202
203			# make /sysroot/dev/console & /mnt/dev/null
204			[ ! -e /sysroot/dev/console ] && mknod -m 600 /sysroot/dev/console c 5 1
205			[ ! -e /sysroot/dev/null ] && mknod -m 666 /sysroot/dev/null c 1 3
206	niro	753	# only to be safe and to have a log channel
207	niro	757	[ ! -e /sysroot/dev/tty ] && mknod /sysroot/dev/tty c 5 0
208	niro	753	# busybox needs this one
209	niro	757	[ ! -e /sysroot/dev/tty5 ] && mknod /sysroot/dev/tty5 c 4 5
210	niro	532
211	niro	1296	(cd ${CLOOPMOUNTDIR}; cp -a etc root home var /sysroot)
212	niro	532
213	niro	1512	# ensure that /sysroot/linurc exists
214			[ ! -e /sysroot/linuxrc ] && ln -snf ${INITEXEC} /sysroot/linuxrc
215
216	niro	532	# ensure the right permissions
217			chmod 1777 /sysroot/tmp
218			chmod 1777 /sysroot/var/tmp
219			fi
220
221			cd /
222
223	niro	894	# unset hotplug event-manager
224			echo > /proc/sys/kernel/hotplug
225
226	niro	532	# de-silencio
227			echo 3 > /proc/sys/kernel/printk
228
229	niro	1188	if [[ ${BREAK_ENABLED} = yes ]]
230			then
231			echo "-- Break requested, type 'exit' to resume operation ..."
232			ash
233			fi
234
235	niro	532	echo "-- Switching to real sysroot ..."
236	niro	894	umount /dev
237	niro	532	umount /sys
238			umount /proc
239
240	niro	1180	exec run-init /sysroot ${INITEXEC} $@ </sysroot/dev/console >/sysroot/dev/console