mkinitrd/lib/linuxrc.sh

#!/bin/sh
# $Header: /home/cvsd/magellan-cvs/magellan-src/mkinitrd/lib/linuxrc.sh,v 1.9 2007-11-10 19:56:06 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
NOPATA=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
			;;
		nopata)
			NOPATA=yes
			;;
	esac
done

# now load all needed modules
load_kernel_modules "generic"
[ "${NOPATA}" != "yes" ] && load_kernel_modules "pata"
[ "${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 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

	(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 1.9 2007-11-10 19:56:06 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	NOPATA=no
60
61	## starts here ##
62
63	# mount essential filesystems
64	mount -t proc proc /proc
65	mount -t sysfs sysfs /sys
66
67	# silencio
68	echo 0 > /proc/sys/kernel/printk
69
70	# check command line for params
71	for i in $(cat /proc/cmdline)
72	do
73	case "${i}" in
74	doscsi)
75	DOSCSI=yes
76	;;
77	dousb)
78	DOUSB=yes
79	;;
80	dosata)
81	DOSATA=yes
82	;;
83	nopata)
84	NOPATA=yes
85	;;
86	esac
87	done
88
89	# now load all needed modules
90	load_kernel_modules "generic"
91	[ "${NOPATA}" != "yes" ] && load_kernel_modules "pata"
92	[ "${DOSCSI}" = "yes" ] && load_kernel_modules "scsi"
93	[ "${DOUSB}" = "yes" ] && load_kernel_modules "usb"
94	[ "${DOSATA}" = "yes" ] && load_kernel_modules "sata"
95
96	# create newroot mount point
97	mkdir -p /sysroot
98	# fake a new filesystem (also needed with an initramfs!!)
99	mount -t tmpfs tmpfs /sysroot
100
101	mkdir -p /sysroot/mnt/cdrom
102	mkdir -p /sysroot/mnt/cloop
103	mkdir -p /sysroot/mnt/magellan
104
105
106	# needed for the usbstick, the timeout maybe to short
107	if [ "${DOUSB}" = "yes" ]; then
108	echo "-- Waiting 8 seconds for possible usb mount ..."
109	sleep 8
110	fi
111
112	# searching cdrom with cdid
113	BOOT_DEVICE=""
114	FSTYPE=""
115
116	echo "Searching for a boot device ..."
117
118	# searching usbstick
119	if [ "${DOUSB}" = "yes" ]; then
120	check_drives "/dev/sd*" "vfat"
121	check_drives "/dev/sg*" "vfat"
122	fi
123
124	# for cdrom_device in $CDROM_LIST (ide)
125	check_drives "/dev/cdroms/*" iso9660
126	check_drives "/dev/hd*" iso9660
127
128	# scsi cdroms
129	if [ "${DOSCSI}" = "yes" ] \|\| [ "${DOSATA}" = "yes" ]; then
130	check_drives "/dev/sr*" iso9660
131	check_drives "/dev/sg*" iso9660
132	check_drives "/dev/scd*" iso9660
133	fi
134
135	# mount our rootfs from cdrom
136	if [ "${BOOT_DEVICE}" = "" ]
137	then
138	echo "No Magellan boot CD/USBStick found!!!"
139	ash
140	exit 1
141	else
142	echo -e "Booting from: $BOOT_DEVICE ..."
143	mount -o ro -t "${FSTYPE}" "${BOOT_DEVICE}" /sysroot/mnt/cdrom >/dev/null 2>&1
144
145	# write our boot_device to /mnt/.bootdev for later use (mtab)
146	echo "BOOTDEV=${BOOT_DEVICE}" > /sysroot/.bootdev
147	echo "FSTYPE=${FSTYPE}" >> /sysroot/.bootdev
148
149	# mount squashfs
150	echo -e "Mounting squashfs system image ..."
151	echo
152	[ ! -e /dev/loop0 ] && mknod /dev/loop0 b 7 0
153	mount -o loop,ro -t squashfs /sysroot/mnt/cdrom/livecdrootfs.sqsh /sysroot/mnt/cloop
154
155	# symlinking cloop rootfs to /mnt as newroot
156	cd /sysroot
157
158	for x in bin sbin lib lib64 boot usr opt
159	do
160	[ -d mnt/cloop/${x} ] && ln -s mnt/cloop/${x} ${x}
161	done
162	mkdir -p initrd proc tmp sys var/tmp dev media
163
164	# make /sysroot/dev/console & /mnt/dev/null
165	[ ! -e /sysroot/dev/console ] && mknod -m 600 /sysroot/dev/console c 5 1
166	[ ! -e /sysroot/dev/null ] && mknod -m 666 /sysroot/dev/null c 1 3
167
168	(cd /sysroot/mnt/cloop; cp -a etc root home var /sysroot)
169
170	# ensure the right permissions
171	chmod 1777 /sysroot/tmp
172	chmod 1777 /sysroot/var/tmp
173	fi
174
175	cd /
176
177	# de-silencio
178	echo 3 > /proc/sys/kernel/printk
179
180	echo "-- Switching to real sysroot ..."
181	umount /sys
182	umount /proc
183
184	exec run-init /sysroot /sbin/init $@ </sysroot/dev/console >/sysroot/dev/console