mkinitrd/lib/linuxrc.sh

#!/bin/sh
# $Header: /home/cvsd/magellan-cvs/magellan-src/mkinitrd/lib/linuxrc.sh,v 1.7 2007-04-19 12:07:58 niro Exp $

# 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=no

## starts here ##

# mount essential filesystems
mount -t proc proc /proc
mount -t sysfs sysfs /sys

# 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
			;;
		dousb)
			DOUSB=yes
			;;
		dosata)
			DOSATA=yes
			;;
	esac
done

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

# 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
	check_drives "/dev/sd*" "vfat"
	check_drives "/dev/sg*" "vfat"
fi

# for cdrom_device in $CDROM_LIST (ide)
check_drives "/dev/cdroms/*" iso9660
check_drives "/dev/hd*" iso9660

# scsi cdroms
if [ "${DOSCSI}" = "yes" ] || [ "${DOSATA}" = "yes" ]; then
	check_drives "/dev/sr*" iso9660
	check_drives "/dev/sg*" iso9660
	check_drives "/dev/scd*" iso9660
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 boot usr opt
	do
		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

	(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 /

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

echo "-- Switching to real sysroot ..."
umount /sys
umount /proc

exec run-init /sysroot /sbin/init $@ </sysroot/dev/console >/sysroot/dev/console
1	niro	333	#!/bin/sh
2	niro	470	# $Header: /home/cvsd/magellan-cvs/magellan-src/mkinitrd/lib/linuxrc.sh,v 1.7 2007-04-19 12:07:58 niro Exp $
3	niro	333
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=no
59
60			## starts here ##
61
62			# mount essential filesystems
63			mount -t proc proc /proc
64			mount -t sysfs sysfs /sys
65
66			# silencio
67			echo 0 > /proc/sys/kernel/printk
68
69			# check command line for params
70			for i in $(cat /proc/cmdline)
71			do
72			case "${i}" in
73			doscsi)
74			DOSCSI=yes
75			;;
76			dousb)
77			DOUSB=yes
78			;;
79			dosata)
80			DOSATA=yes
81			;;
82			esac
83			done
84
85			# now load all needed modules
86			load_kernel_modules "generic"
87			[ "${DOSCSI}" = "yes" ] && load_kernel_modules "scsi"
88			[ "${DOUSB}" = "yes" ] && load_kernel_modules "usb"
89			[ "${DOSATA}" = "yes" ] && load_kernel_modules "sata"
90
91			# create newroot mount point
92			mkdir -p /sysroot
93			# fake a new filesystem (also needed with an initramfs!!)
94			mount -t tmpfs tmpfs /sysroot
95
96			mkdir -p /sysroot/mnt/cdrom
97			mkdir -p /sysroot/mnt/cloop
98			mkdir -p /sysroot/mnt/magellan
99
100
101			# needed for the usbstick, the timeout maybe to short
102			if [ "${DOUSB}" = "yes" ]; then
103	niro	353	echo "-- Waiting 8 seconds for possible usb mount ..."
104			sleep 8
105	niro	333	fi
106
107			# searching cdrom with cdid
108			BOOT_DEVICE=""
109			FSTYPE=""
110
111			echo "Searching for a boot device ..."
112
113			# searching usbstick
114	niro	335	if [ "${DOUSB}" = "yes" ]; then
115	niro	470	check_drives "/dev/sd*" "vfat"
116			check_drives "/dev/sg*" "vfat"
117	niro	335	fi
118	niro	333
119			# for cdrom_device in $CDROM_LIST (ide)
120			check_drives "/dev/cdroms/*" iso9660
121			check_drives "/dev/hd*" iso9660
122
123			# scsi cdroms
124	niro	335	if [ "${DOSCSI}" = "yes" ] \|\| [ "${DOSATA}" = "yes" ]; then
125			check_drives "/dev/sr*" iso9660
126	niro	470	check_drives "/dev/sg*" iso9660
127			check_drives "/dev/scd*" iso9660
128	niro	335	fi
129	niro	333
130			# mount our rootfs from cdrom
131			if [ "${BOOT_DEVICE}" = "" ]
132			then
133			echo "No Magellan boot CD/USBStick found!!!"
134			ash
135			exit 1
136			else
137			echo -e "Booting from: $BOOT_DEVICE ..."
138			mount -o ro -t "${FSTYPE}" "${BOOT_DEVICE}" /sysroot/mnt/cdrom >/dev/null 2>&1
139
140			# write our boot_device to /mnt/.bootdev for later use (mtab)
141			echo "BOOTDEV=${BOOT_DEVICE}" > /sysroot/.bootdev
142			echo "FSTYPE=${FSTYPE}" >> /sysroot/.bootdev
143
144			# mount squashfs
145			echo -e "Mounting squashfs system image ..."
146			echo
147			[ ! -e /dev/loop0 ] && mknod /dev/loop0 b 7 0
148			mount -o loop,ro -t squashfs /sysroot/mnt/cdrom/livecdrootfs.sqsh /sysroot/mnt/cloop
149
150			# symlinking cloop rootfs to /mnt as newroot
151			cd /sysroot
152
153			for x in bin sbin lib boot usr opt
154			do
155			ln -s mnt/cloop/${x} ${x}
156			done
157	niro	353	mkdir -p initrd proc tmp sys var/tmp dev media
158	niro	333
159			# make /sysroot/dev/console & /mnt/dev/null
160			[ ! -e /sysroot/dev/console ] && mknod -m 600 /sysroot/dev/console c 5 1
161			[ ! -e /sysroot/dev/null ] && mknod -m 666 /sysroot/dev/null c 1 3
162
163			(cd /sysroot/mnt/cloop; cp -a etc root home var /sysroot)
164
165	niro	334	# ensure the right permissions
166	niro	333	chmod 1777 /sysroot/tmp
167			chmod 1777 /sysroot/var/tmp
168			fi
169
170			cd /
171
172			# de-silencio
173			echo 3 > /proc/sys/kernel/printk
174
175			echo "-- Switching to real sysroot ..."
176			umount /sys
177			umount /proc
178
179			exec run-init /sysroot /sbin/init $@ </sysroot/dev/console >/sysroot/dev/console