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"

## 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#*=}";;
	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 /sysroot/mnt/cloop

	# symlinking cloop rootfs to /mnt as newroot
	cd /sysroot

	for x in bin sbin lib lib64 boot usr opt
	do
		[ -d mnt/cloop/${x} ] && ln -s mnt/cloop/${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 /sysroot/mnt/cloop; cp -a etc root home var /sysroot)

	# 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

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	532
64			## starts here ##
65
66			# mount essential filesystems
67			mount -t proc proc /proc
68			mount -t sysfs sysfs /sys
69	niro	894	mount -t tmpfs tmpfs /dev -o rw,mode=0644,size=1024
70	niro	532
71	niro	894	# install all busybox applets
72			busybox --install -s
73
74	niro	532	# silencio
75			echo 0 > /proc/sys/kernel/printk
76
77			# check command line for params
78			for i in $(cat /proc/cmdline)
79			do
80			case "${i}" in
81	niro	894	doscsi) DOSCSI=yes;;
82			noscsi) DOSCSI=no;;
83			dousb) DOUSB=yes;;
84			nousb) DOUSB=no;;
85			dosata) DOSATA=yes ;;
86			nosata) DOSATA=no ;;
87			dofb) DOFB=yes;;
88			nofb) DOFB=no;;
89			dopata) DOPATA=yes;;
90			nopata) DOPATA=no;;
91			rootfs=) FORCED_ROOTFS="${i#=}";;
92	niro	1180	init=) INITEXEC="${i#=}";;
93	niro	532	esac
94			done
95
96			# now load all needed modules
97	niro	671	[ "${DOFB}" = "yes" ] && load_kernel_modules "framebuffer"
98	niro	532	load_kernel_modules "generic"
99	niro	673	[ "${DOPATA}" = "yes" ] && load_kernel_modules "pata"
100	niro	532	[ "${DOSCSI}" = "yes" ] && load_kernel_modules "scsi"
101			[ "${DOUSB}" = "yes" ] && load_kernel_modules "usb"
102			[ "${DOSATA}" = "yes" ] && load_kernel_modules "sata"
103
104	niro	894	# populate dev
105			mdev -s
106			# handle hotplug events properly
107			echo /sbin/mdev > /proc/sys/kernel/hotplug
108
109	niro	532	# create newroot mount point
110			mkdir -p /sysroot
111			# fake a new filesystem (also needed with an initramfs!!)
112			mount -t tmpfs tmpfs /sysroot
113
114			mkdir -p /sysroot/mnt/cdrom
115			mkdir -p /sysroot/mnt/cloop
116			mkdir -p /sysroot/mnt/magellan
117
118
119			# needed for the usbstick, the timeout maybe to short
120			if [ "${DOUSB}" = "yes" ]; then
121			echo "-- Waiting 8 seconds for possible usb mount ..."
122			sleep 8
123			fi
124
125			# searching cdrom with cdid
126			BOOT_DEVICE=""
127			FSTYPE=""
128
129			echo "Searching for a boot device ..."
130
131			# searching usbstick
132			if [ "${DOUSB}" = "yes" ]; then
133	niro	663	ROOTFS="vfat"
134	niro	706	[[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}"
135	niro	663	check_drives "/dev/sd*" "${ROOTFS}"
136			check_drives "/dev/sg*" "${ROOTFS}"
137	niro	532	fi
138
139			# for cdrom_device in $CDROM_LIST (ide)
140	niro	663	ROOTFS="iso9660"
141	niro	706	[[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}"
142	niro	663	check_drives "/dev/cdroms/*" "${ROOTFS}"
143			check_drives "/dev/hd*" "${ROOTFS}"
144	niro	532
145			# scsi cdroms
146			if [ "${DOSCSI}" = "yes" ] \|\| [ "${DOSATA}" = "yes" ]; then
147	niro	663	ROOTFS="iso9660"
148	niro	706	[[ ! -z ${FORCED_ROOTFS} ]] && ROOTFS="${FORCED_ROOTFS}"
149	niro	663	check_drives "/dev/sr*" "${ROOTFS}"
150			check_drives "/dev/sg*" "${ROOTFS}"
151			check_drives "/dev/scd*" "${ROOTFS}"
152	niro	532	fi
153
154			# mount our rootfs from cdrom
155			if [ "${BOOT_DEVICE}" = "" ]
156			then
157			echo "No Magellan boot CD/USBStick found!!!"
158			ash
159			exit 1
160			else
161			echo -e "Booting from: $BOOT_DEVICE ..."
162			mount -o ro -t "${FSTYPE}" "${BOOT_DEVICE}" /sysroot/mnt/cdrom >/dev/null 2>&1
163
164			# write our boot_device to /mnt/.bootdev for later use (mtab)
165			echo "BOOTDEV=${BOOT_DEVICE}" > /sysroot/.bootdev
166			echo "FSTYPE=${FSTYPE}" >> /sysroot/.bootdev
167
168			# mount squashfs
169			echo -e "Mounting squashfs system image ..."
170			echo
171			[ ! -e /dev/loop0 ] && mknod /dev/loop0 b 7 0
172			mount -o loop,ro -t squashfs /sysroot/mnt/cdrom/livecdrootfs.sqsh /sysroot/mnt/cloop
173
174			# symlinking cloop rootfs to /mnt as newroot
175			cd /sysroot
176
177	niro	605	for x in bin sbin lib lib64 boot usr opt
178	niro	532	do
179	niro	605	[ -d mnt/cloop/${x} ] && ln -s mnt/cloop/${x} ${x}
180	niro	532	done
181			mkdir -p initrd proc tmp sys var/tmp dev media
182
183			# make /sysroot/dev/console & /mnt/dev/null
184			[ ! -e /sysroot/dev/console ] && mknod -m 600 /sysroot/dev/console c 5 1
185			[ ! -e /sysroot/dev/null ] && mknod -m 666 /sysroot/dev/null c 1 3
186	niro	753	# only to be safe and to have a log channel
187	niro	757	[ ! -e /sysroot/dev/tty ] && mknod /sysroot/dev/tty c 5 0
188	niro	753	# busybox needs this one
189	niro	757	[ ! -e /sysroot/dev/tty5 ] && mknod /sysroot/dev/tty5 c 4 5
190	niro	532
191			(cd /sysroot/mnt/cloop; cp -a etc root home var /sysroot)
192
193			# ensure the right permissions
194			chmod 1777 /sysroot/tmp
195			chmod 1777 /sysroot/var/tmp
196			fi
197
198			cd /
199
200	niro	894	# unset hotplug event-manager
201			echo > /proc/sys/kernel/hotplug
202
203	niro	532	# de-silencio
204			echo 3 > /proc/sys/kernel/printk
205
206			echo "-- Switching to real sysroot ..."
207	niro	894	umount /dev
208	niro	532	umount /sys
209			umount /proc
210
211	niro	1180	exec run-init /sysroot ${INITEXEC} $@ </sysroot/dev/console >/sysroot/dev/console