mkinitrd/lib/linuxrc.sh

#!/bin/sh
# $Header: /home/cvsd/magellan-cvs/magellan-src/mkinitrd/lib/linuxrc.sh,v 1.3 2006-02-23 15:54:30 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

echo "-- Creating inital device nodes ..."
mount -o mode=0755 -t tmpfs udev /dev
mkdir /dev/pts
mkdir /dev/shm
mkdir /dev/mapper
mknod /dev/console c 5 1
mknod /dev/null c 1 3
mknod /dev/ram b 1 1
mknod /dev/rtc c 10 135
mknod /dev/systty c 4 0
mknod /dev/tty c 5 0
mknod /dev/zero c 1 5
mknod /dev/tty0 c 4 0
mknod /dev/tty1 c 4 1
mknod /dev/tty2 c 4 2
mknod /dev/tty3 c 4 3
mknod /dev/tty4 c 4 4
mknod /dev/tty5 c 4 5
mknod /dev/tty6 c 4 6
mknod /dev/tty7 c 4 7
mknod /dev/tty8 c 4 8
mknod /dev/tty9 c 4 9
mknod /dev/tty10 c 4 10
mknod /dev/tty11 c 4 11
mknod /dev/tty12 c 4 12
mknod /dev/ttyS0 c 4 64
mknod /dev/ttyS1 c 4 65
mknod /dev/ttyS2 c 4 66
mknod /dev/ttyS3 c 4 67

echo "-- Starting udevd ..."
ln -snf bin /sbin
/sbin/udevstart
ln -snf /proc/self/fd /dev/fd
ln -snf fd/0 /dev/stdin
ln -snf fd/1 /dev/stdout
ln -snf fd/2 /dev/stderr
ln -snf /proc/kcore /dev/core
touch /dev/.udev

echo "-- Setting up hotplug ..."
#echo "/sbin/hotplug" > /proc/sys/kernel/hotplug
echo "/sbin/udev" > /proc/sys/kernel/hotplug

# 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 3 seconds for possible usb mount ..."
	sleep 3
fi

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

echo "Searching for a boot device ..."

# searching usbstick
if [ "${DOUSB}" = "yes" ]; then
	check_drives "/dev/scsi/host[0-99]/bus[0-99]/target[0-99]/lun[0-99]/part[0-99]" "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
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

	# 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	#!/bin/sh
2	# $Header: /home/cvsd/magellan-cvs/magellan-src/mkinitrd/lib/linuxrc.sh,v 1.3 2006-02-23 15:54:30 niro Exp $
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=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	echo "-- Creating inital device nodes ..."
70	mount -o mode=0755 -t tmpfs udev /dev
71	mkdir /dev/pts
72	mkdir /dev/shm
73	mkdir /dev/mapper
74	mknod /dev/console c 5 1
75	mknod /dev/null c 1 3
76	mknod /dev/ram b 1 1
77	mknod /dev/rtc c 10 135
78	mknod /dev/systty c 4 0
79	mknod /dev/tty c 5 0
80	mknod /dev/zero c 1 5
81	mknod /dev/tty0 c 4 0
82	mknod /dev/tty1 c 4 1
83	mknod /dev/tty2 c 4 2
84	mknod /dev/tty3 c 4 3
85	mknod /dev/tty4 c 4 4
86	mknod /dev/tty5 c 4 5
87	mknod /dev/tty6 c 4 6
88	mknod /dev/tty7 c 4 7
89	mknod /dev/tty8 c 4 8
90	mknod /dev/tty9 c 4 9
91	mknod /dev/tty10 c 4 10
92	mknod /dev/tty11 c 4 11
93	mknod /dev/tty12 c 4 12
94	mknod /dev/ttyS0 c 4 64
95	mknod /dev/ttyS1 c 4 65
96	mknod /dev/ttyS2 c 4 66
97	mknod /dev/ttyS3 c 4 67
98
99	echo "-- Starting udevd ..."
100	ln -snf bin /sbin
101	/sbin/udevstart
102	ln -snf /proc/self/fd /dev/fd
103	ln -snf fd/0 /dev/stdin
104	ln -snf fd/1 /dev/stdout
105	ln -snf fd/2 /dev/stderr
106	ln -snf /proc/kcore /dev/core
107	touch /dev/.udev
108
109	echo "-- Setting up hotplug ..."
110	#echo "/sbin/hotplug" > /proc/sys/kernel/hotplug
111	echo "/sbin/udev" > /proc/sys/kernel/hotplug
112
113	# check command line for params
114	for i in $(cat /proc/cmdline)
115	do
116	case "${i}" in
117	doscsi)
118	DOSCSI=yes
119	;;
120	dousb)
121	DOUSB=yes
122	;;
123	dosata)
124	DOSATA=yes
125	;;
126	esac
127	done
128
129	# now load all needed modules
130	load_kernel_modules "generic"
131	[ "${DOSCSI}" = "yes" ] && load_kernel_modules "scsi"
132	[ "${DOUSB}" = "yes" ] && load_kernel_modules "usb"
133	[ "${DOSATA}" = "yes" ] && load_kernel_modules "sata"
134
135	# create newroot mount point
136	mkdir -p /sysroot
137	# fake a new filesystem (also needed with an initramfs!!)
138	mount -t tmpfs tmpfs /sysroot
139
140	mkdir -p /sysroot/mnt/cdrom
141	mkdir -p /sysroot/mnt/cloop
142	mkdir -p /sysroot/mnt/magellan
143
144
145	# needed for the usbstick, the timeout maybe to short
146	if [ "${DOUSB}" = "yes" ]; then
147	echo "-- Waiting 3 seconds for possible usb mount ..."
148	sleep 3
149	fi
150
151	# searching cdrom with cdid
152	BOOT_DEVICE=""
153	FSTYPE=""
154
155	echo "Searching for a boot device ..."
156
157	# searching usbstick
158	if [ "${DOUSB}" = "yes" ]; then
159	check_drives "/dev/scsi/host[0-99]/bus[0-99]/target[0-99]/lun[0-99]/part[0-99]" "vfat"
160	fi
161
162	# for cdrom_device in $CDROM_LIST (ide)
163	check_drives "/dev/cdroms/*" iso9660
164	check_drives "/dev/hd*" iso9660
165
166	# scsi cdroms
167	if [ "${DOSCSI}" = "yes" ] \|\| [ "${DOSATA}" = "yes" ]; then
168	check_drives "/dev/sr*" iso9660
169	fi
170
171	# mount our rootfs from cdrom
172	if [ "${BOOT_DEVICE}" = "" ]
173	then
174	echo "No Magellan boot CD/USBStick found!!!"
175	ash
176	exit 1
177	else
178	echo -e "Booting from: $BOOT_DEVICE ..."
179	mount -o ro -t "${FSTYPE}" "${BOOT_DEVICE}" /sysroot/mnt/cdrom >/dev/null 2>&1
180
181	# write our boot_device to /mnt/.bootdev for later use (mtab)
182	echo "BOOTDEV=${BOOT_DEVICE}" > /sysroot/.bootdev
183	echo "FSTYPE=${FSTYPE}" >> /sysroot/.bootdev
184
185	# mount squashfs
186	echo -e "Mounting squashfs system image ..."
187	echo
188	[ ! -e /dev/loop0 ] && mknod /dev/loop0 b 7 0
189	mount -o loop,ro -t squashfs /sysroot/mnt/cdrom/livecdrootfs.sqsh /sysroot/mnt/cloop
190
191	# symlinking cloop rootfs to /mnt as newroot
192	cd /sysroot
193
194	for x in bin sbin lib boot usr opt
195	do
196	ln -s mnt/cloop/${x} ${x}
197	done
198	mkdir -p initrd proc tmp sys var/tmp dev
199
200	# make /sysroot/dev/console & /mnt/dev/null
201	[ ! -e /sysroot/dev/console ] && mknod -m 600 /sysroot/dev/console c 5 1
202	[ ! -e /sysroot/dev/null ] && mknod -m 666 /sysroot/dev/null c 1 3
203
204	(cd /sysroot/mnt/cloop; cp -a etc root home var /sysroot)
205
206	# ensure the right permissions
207	chmod 1777 /sysroot/tmp
208	chmod 1777 /sysroot/var/tmp
209	fi
210
211	cd /
212
213	# de-silencio
214	echo 3 > /proc/sys/kernel/printk
215
216	echo "-- Switching to real sysroot ..."
217	umount /sys
218	umount /proc
219
220	exec run-init /sysroot /sbin/init $@ </sysroot/dev/console >/sysroot/dev/console