Annotation of /trunk/mlivecdbuild/files/linuxrc

#!/bin/sh

#some nice colors:
COLRED="\033[1;6m\033[31m"
COLGREEN="\033[1;6m\033[32m"
COLYELLOW="\033[1;6m\033[33m"
COLBLUE="\033[1;6m\033[34m"
COLMAGENTA="\033[1;6m\033[35m"
COLWHITE="\033[1;6m\033[37m"
COLDEFAULT="\033[0m"

COLOREDSTAR="${COLBLUE}(${COLGREEN}*${COLBLUE})${COLDEFAULT} "

CDID=cdid
PATH="/bin:/sbin:/usr/bin:/usr/sbin"

DOSCSI=no
DOUSB=no

if [ -e /mods_scsi ]
then
	MODS_SCSI="$(cat /mods_scsi)"
else
	MODS_SCSI=""
fi

if [ -e /mods_usb ]
then
	MODS_USB="$(cat mods_usb)"
else
	MODS_USB=""
fi

#some needed functions
populate_udev()
{
		/sbin/udevstart

		# not provided by sysfs but needed
		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
		ln -snf /proc/asound/oss/sndstat /dev/sndstat

		# create problematic directories
		mkdir -p /dev/pts
		mkdir -p /dev/shm

		#same as /dev/.devfsd
		touch /dev/.udev

		return 0
}

kernel_major_version()
{
        local KV
        KV="$(uname -r|cut -d. -f1-2)"
        echo "${KV}"
}


scan_kernel_modules()
{
	local MODS
	TYPE="$1"
	MODS="$2"

	if [ "$(kernel_major_version)" = "2.6" ]
	then
		MOD_SUFFIX="ko"
	else
		MOD_SUFFIX="o"
	fi

	echo -e ${COLWHITE}"--  Loading ${TYPE} modules:"${COLDEFAULT}
	for i in ${MODS}
	do
		if [ -e /modules/${TYPE}/${i}.${MOD_SUFFIX} ]
		then
			insmod.static -f /modules/${TYPE}/${i}.${MOD_SUFFIX} > /dev/null 2>&1
			if [ $? -eq 0 ]
			then
				echo -e ${COLWHITE}"--      ${i}"${COLDEFAULT}
			fi
		else
			echo -e ${COLWHITE}"--      ${i} not found."${COLDEFAULT}
		fi
	done
}

#check_drives $devices $fstype
check_drives()
{
	local devices
	local fs

	devices="$1"
	fs="$2"

	for dev in ${devices}
	do
		mount -t ${fs} ${dev} /mnt/mnt/tmp >/dev/null 2>&1
		media_found=$?

		#if mount was ok check if cdid exists
		if [ "${media_found}" -eq 0 ]
		then
			if [ -e /mnt/mnt/tmp/${CDID} ]
			then
				media_id_ok=$?
			fi
			umount /mnt/mnt/tmp

			if [ "${media_id_ok}" -eq 0 ]
			then
				echo -e ${COLOREDSTAR}"${COLGREEN}Magellan boot device found.${COLDEFAULT}"
				BOOT_DEVICE="${dev}"
				FSTYPE=${fs}
				break;
			fi
		fi
	done

}

# first of all read in kernel-config params
. /etc/conf.d/kernel

# remount / writeable
mount -n -oremount,rw /dev/ram0 / -t cramfs

# mount proc
if [ ! -e /proc/mounts ]
then
	[ ! -d "/proc" ] && mkdir -p /proc
	echo -e ${COLOREDSTAR}"${COLWHITE}Mounting proc file system ...${COLDEFAULT}"
	mount -t proc proc /proc
fi

# kernel 2.6-x needs sysfs
if [ "$(kernel_major_version)" = "2.6" ]
then
	[ ! -d /sys ] && mkdir /sys
	echo -e ${COLOREDSTAR}"${COLWHITE}Mounting sysfs file system ...${COLDEFAULT}"
	mount -t sysfs none /sys
fi

### load devfs ###
# mount devfs only with a 2.4 kernel or its really wanted with a 2.6
if [ "$(kernel_major_version)" = "2.4" -o "${RC_USED_DEV}" = "devfs" ]
then
	[ ! -d "/dev" ] && mkdir -p /dev

	if [ ! -e /dev/.devfsd ]
	then
		echo -e ${COLOREDSTAR}"${COLWHITE}Mounting devfs file system ...${COLDEFAULT}"
		mount -t devfs devfs /dev
	fi
fi

#### load udev ####
# load udev only with a 2.6 kernel
if [ "$(kernel_major_version)" = "2.6" -a "${RC_USED_DEV}" = "udev" ]
then
	# create a ramdisk for populating udev
	echo -e ${COLOREDSTAR}"${COLWHITE}Mounting ramfs at /dev ...${COLDEFAULT}"
	mount -n -t ramfs none /dev

	# if a device tarball exists load it and if it is activated
	echo -e ${COLOREDSTAR}"${COLWHITE}Configurating system to use udev ...${COLDEFAULT}"

	# now load udev
	populate_udev

	# if hotplug support exists in the kernel use it to manage udev
	echo -e ${COLOREDSTAR}"${COLWHITE}  Setting /sbin/udev as hotplug agent ...${COLDEFAULT}"
	echo "/sbin/udev" > /proc/sys/kernel/hotplug
fi

# kernel2.6 needs again devpts
if [ "$(kernel_major_version)" = "2.6" ]
then
	echo -e ${COLOREDSTAR}"${COLWHITE}Mounting devpts at /dev/pts ...${COLDEFAULT}"
	[ ! -d "/dev/pts" ] && mkdir -p /dev/pts
	mount -n -t devpts -o gid=4,mode=0620 none /dev/pts
fi

# disable kernel messages to console
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
			;;
	esac
done

# now load all needed modules
if [ -n "${MODS_SCSI}" -a "${DOSCSI}" = "yes" ]
then
	scan_kernel_modules "scsi" "${MODS_SCSI}"
	echo
fi

if [ -n "${MODS_USB}" -a "${DOUSB}" = "yes" ]
then
	scan_kernel_modules "usb" "${MODS_USB}"
	echo
fi


# create newroot mount point with tmpfs
mkdir -p /mnt
mount -t tmpfs tmpfs /mnt

mkdir -p /mnt/mnt/tmp
mkdir -p /mnt/mnt/cdrom
mkdir -p /mnt/mnt/cloop
mkdir -p /mnt/mnt/magellan

# needed for the usbstick, the timeout maybe to short
echo -e ${COLOREDSTAR}"${COLWHITE}Waiting 3 seconds for possible usb mount ..."
sleep 3

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

echo -e ${COLOREDSTAR}"${COLWHITE}Searching for a boot device ..."
# searching usbstick
check_drives "/dev/scsi/host[0-99]/bus[0-99]/target[0-99]/lun[0-99]/part[0-99]" "vfat"

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

# scsi cdroms
check_drives "/dev/sr*" iso9660

# mount our rootfs from cdrom
if [ "${BOOT_DEVICE}" = "" ]
then
	echo -e ${COLREDSTAR}"${COLRED}No Magellan boot CD/USBStick found!!!${COLDEFAULT}"
	ash
	exit 1
else
	echo -e ${COLOREDSTAR}"${COLWHITE}Booting from: $BOOT_DEVICE ...${COLDEFAULT}"
	mount -o ro -t "${FSTYPE}" "${BOOT_DEVICE}" /mnt/mnt/cdrom >/dev/null 2>&1

	# write our boot_device to /mnt/.bootdev for later use (mtab)
	echo "BOOTDEV=${BOOT_DEVICE}" > /mnt/.bootdev
	echo "FSTYPE=${FSTYPE}" >> /mnt/.bootdev

	if [ -f /mnt/mnt/cdrom/livecdrootfs.cloop ]
	then
		# mount rootfs (cloop)
		echo -e ${COLOREDSTAR}"${COLWHITE}Mounting cloop system image ...${COLDEFAULT}"
		echo
		[ ! -e /dev/cloop ] && mknod /dev/cloop b 240 0
		insmod /lib/modules/misc/cloop.o file=/mnt/mnt/cdrom/livecdrootfs.cloop > /dev/null
		mkdir -p /mnt/mnt/cloop
		mount -o ro -t ext2 /dev/cloop /mnt/mnt/cloop
	else
		# mount squashfs
		echo -e ${COLOREDSTAR}"${COLWHITE}Mounting squashfs system image ...${COLDEFAULT}"
		echo
		[ ! -e /dev/loop0 ] && mknod /dev/loop0 b 7 0
		mount -o loop,ro -t squashfs /mnt/mnt/cdrom/livecdrootfs.sqsh /mnt/mnt/cloop
	fi

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

	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
	chmod 1777 tmp var/tmp

	# make /mnt/dev/console & /mnt/dev/null
	[ ! -e /mnt/dev/console ] && mknod -m 600 /mnt/dev/console c 5 1
	[ ! -e /mnt/dev/null ] && mknod -m 666 /mnt/dev/null c 1 3 

	(cd /mnt/mnt/cloop; cp -a etc root home var /mnt)

	# shurely change to correct permissions
	chmod 1777 /mnt/tmp
	chmod 1777 /mnt/var/tmp

	#ash

	# set default verbose level for kernel messages
	[ -z "${RC_VERBOSE_LEVEL}" ] && RC_VERBOSE_LEVEL=3
	echo "${RC_VERBOSE_LEVEL}" > /proc/sys/kernel/printk
	
	cd /mnt

	pivot_root . initrd

	# dirty but working
	# umount devpts
	umount -n /initrd/dev/pts &> /dev/null
	# wait a little bit to be safe
	sleep 1
	# umount devfs or udev
	umount -n /initrd/dev &> /dev/null
	# umount sysfs
	umount -n /initrd/sys &> /dev/null
	# umount proc
	umount -n /initrd/proc &> /dev/null

	#debug
	#/initrd/bin/busybox ash

	#enter chroot and umount /initrd
	exec chroot . sh -c 'umount -n /initrd >/dev/null 2>&1;\
		exec -a init.new /sbin/init'\
		</dev/console >/dev/console 2>&1
fi
1	niro	27	#!/bin/sh
2
3			#some nice colors:
4			COLRED="\033[1;6m\033[31m"
5			COLGREEN="\033[1;6m\033[32m"
6			COLYELLOW="\033[1;6m\033[33m"
7			COLBLUE="\033[1;6m\033[34m"
8			COLMAGENTA="\033[1;6m\033[35m"
9			COLWHITE="\033[1;6m\033[37m"
10			COLDEFAULT="\033[0m"
11
12			COLOREDSTAR="${COLBLUE}(${COLGREEN}*${COLBLUE})${COLDEFAULT} "
13
14			CDID=cdid
15			PATH="/bin:/sbin:/usr/bin:/usr/sbin"
16
17			DOSCSI=no
18			DOUSB=no
19
20			if [ -e /mods_scsi ]
21			then
22			MODS_SCSI="$(cat /mods_scsi)"
23			else
24			MODS_SCSI=""
25			fi
26
27			if [ -e /mods_usb ]
28			then
29			MODS_USB="$(cat mods_usb)"
30			else
31			MODS_USB=""
32			fi
33
34			#some needed functions
35			populate_udev()
36			{
37			/sbin/udevstart
38	niro	96
39			# not provided by sysfs but needed
40	niro	27	ln -snf /proc/self/fd /dev/fd
41			ln -snf fd/0 /dev/stdin
42			ln -snf fd/1 /dev/stdout
43			ln -snf fd/2 /dev/stderr
44			ln -snf /proc/kcore /dev/core
45			ln -snf /proc/asound/oss/sndstat /dev/sndstat
46
47	niro	96	# create problematic directories
48	niro	27	mkdir -p /dev/pts
49			mkdir -p /dev/shm
50
51			#same as /dev/.devfsd
52			touch /dev/.udev
53	niro	96
54	niro	27	return 0
55			}
56
57			kernel_major_version()
58			{
59			local KV
60			KV="$(uname -r\|cut -d. -f1-2)"
61			echo "${KV}"
62			}
63
64
65			scan_kernel_modules()
66			{
67			local MODS
68			TYPE="$1"
69			MODS="$2"
70
71			if [ "$(kernel_major_version)" = "2.6" ]
72			then
73			MOD_SUFFIX="ko"
74			else
75			MOD_SUFFIX="o"
76			fi
77
78			echo -e ${COLWHITE}"-- Loading ${TYPE} modules:"${COLDEFAULT}
79			for i in ${MODS}
80			do
81			if [ -e /modules/${TYPE}/${i}.${MOD_SUFFIX} ]
82			then
83			insmod.static -f /modules/${TYPE}/${i}.${MOD_SUFFIX} > /dev/null 2>&1
84			if [ $? -eq 0 ]
85			then
86			echo -e ${COLWHITE}"-- ${i}"${COLDEFAULT}
87			fi
88			else
89	niro	96	echo -e ${COLWHITE}"-- ${i} not found."${COLDEFAULT}
90	niro	27	fi
91			done
92			}
93
94			#check_drives $devices $fstype
95			check_drives()
96			{
97			local devices
98			local fs
99
100			devices="$1"
101			fs="$2"
102
103			for dev in ${devices}
104			do
105			mount -t ${fs} ${dev} /mnt/mnt/tmp >/dev/null 2>&1
106			media_found=$?
107
108			#if mount was ok check if cdid exists
109			if [ "${media_found}" -eq 0 ]
110			then
111			if [ -e /mnt/mnt/tmp/${CDID} ]
112			then
113			media_id_ok=$?
114			fi
115			umount /mnt/mnt/tmp
116	niro	96
117	niro	27	if [ "${media_id_ok}" -eq 0 ]
118			then
119			echo -e ${COLOREDSTAR}"${COLGREEN}Magellan boot device found.${COLDEFAULT}"
120			BOOT_DEVICE="${dev}"
121			FSTYPE=${fs}
122			break;
123			fi
124			fi
125			done
126
127			}
128
129	niro	96	# first of all read in kernel-config params
130	niro	27	. /etc/conf.d/kernel
131
132	niro	96	# remount / writeable
133	niro	27	mount -n -oremount,rw /dev/ram0 / -t cramfs
134
135	niro	96	# mount proc
136	niro	27	if [ ! -e /proc/mounts ]
137			then
138			[ ! -d "/proc" ] && mkdir -p /proc
139			echo -e ${COLOREDSTAR}"${COLWHITE}Mounting proc file system ...${COLDEFAULT}"
140			mount -t proc proc /proc
141			fi
142
143	niro	96	# kernel 2.6-x needs sysfs
144	niro	27	if [ "$(kernel_major_version)" = "2.6" ]
145			then
146			[ ! -d /sys ] && mkdir /sys
147			echo -e ${COLOREDSTAR}"${COLWHITE}Mounting sysfs file system ...${COLDEFAULT}"
148			mount -t sysfs none /sys
149			fi
150
151			### load devfs ###
152	niro	96	# mount devfs only with a 2.4 kernel or its really wanted with a 2.6
153	niro	27	if [ "$(kernel_major_version)" = "2.4" -o "${RC_USED_DEV}" = "devfs" ]
154			then
155			[ ! -d "/dev" ] && mkdir -p /dev
156	niro	96
157	niro	27	if [ ! -e /dev/.devfsd ]
158			then
159			echo -e ${COLOREDSTAR}"${COLWHITE}Mounting devfs file system ...${COLDEFAULT}"
160			mount -t devfs devfs /dev
161			fi
162			fi
163
164			#### load udev ####
165	niro	96	# load udev only with a 2.6 kernel
166	niro	27	if [ "$(kernel_major_version)" = "2.6" -a "${RC_USED_DEV}" = "udev" ]
167			then
168	niro	96	# create a ramdisk for populating udev
169	niro	27	echo -e ${COLOREDSTAR}"${COLWHITE}Mounting ramfs at /dev ...${COLDEFAULT}"
170			mount -n -t ramfs none /dev
171	niro	96
172			# if a device tarball exists load it and if it is activated
173	niro	27	echo -e ${COLOREDSTAR}"${COLWHITE}Configurating system to use udev ...${COLDEFAULT}"
174	niro	96
175			# now load udev
176	niro	27	populate_udev
177	niro	96
178			# if hotplug support exists in the kernel use it to manage udev
179	niro	27	echo -e ${COLOREDSTAR}"${COLWHITE} Setting /sbin/udev as hotplug agent ...${COLDEFAULT}"
180			echo "/sbin/udev" > /proc/sys/kernel/hotplug
181			fi
182
183	niro	96	# kernel2.6 needs again devpts
184	niro	27	if [ "$(kernel_major_version)" = "2.6" ]
185			then
186			echo -e ${COLOREDSTAR}"${COLWHITE}Mounting devpts at /dev/pts ...${COLDEFAULT}"
187			[ ! -d "/dev/pts" ] && mkdir -p /dev/pts
188			mount -n -t devpts -o gid=4,mode=0620 none /dev/pts
189			fi
190
191	niro	96	# disable kernel messages to console
192	niro	27	echo "0" > /proc/sys/kernel/printk
193
194	niro	96	# check command line for params
195	niro	27	for i in $(cat /proc/cmdline)
196			do
197			case "${i}" in
198			doscsi)
199			DOSCSI=yes
200			;;
201			dousb)
202			DOUSB=yes
203			;;
204			esac
205			done
206
207	niro	96	# now load all needed modules
208	niro	27	if [ -n "${MODS_SCSI}" -a "${DOSCSI}" = "yes" ]
209			then
210			scan_kernel_modules "scsi" "${MODS_SCSI}"
211			echo
212			fi
213
214			if [ -n "${MODS_USB}" -a "${DOUSB}" = "yes" ]
215			then
216			scan_kernel_modules "usb" "${MODS_USB}"
217			echo
218			fi
219
220
221	niro	96	# create newroot mount point with tmpfs
222	niro	27	mkdir -p /mnt
223			mount -t tmpfs tmpfs /mnt
224
225			mkdir -p /mnt/mnt/tmp
226			mkdir -p /mnt/mnt/cdrom
227			mkdir -p /mnt/mnt/cloop
228			mkdir -p /mnt/mnt/magellan
229
230	niro	96	# needed for the usbstick, the timeout maybe to short
231	niro	27	echo -e ${COLOREDSTAR}"${COLWHITE}Waiting 3 seconds for possible usb mount ..."
232			sleep 3
233
234	niro	96	# searching cdrom with cdid
235	niro	27	BOOT_DEVICE=""
236			FSTYPE=""
237
238			echo -e ${COLOREDSTAR}"${COLWHITE}Searching for a boot device ..."
239	niro	96	# searching usbstick
240	niro	27	check_drives "/dev/scsi/host[0-99]/bus[0-99]/target[0-99]/lun[0-99]/part[0-99]" "vfat"
241
242	niro	96	# for cdrom_device in $CDROM_LIST (ide)
243	niro	27	check_drives "/dev/cdroms/*" iso9660
244
245	niro	96	# scsi cdroms
246	niro	27	check_drives "/dev/sr*" iso9660
247
248	niro	96	# mount our rootfs from cdrom
249	niro	27	if [ "${BOOT_DEVICE}" = "" ]
250			then
251			echo -e ${COLREDSTAR}"${COLRED}No Magellan boot CD/USBStick found!!!${COLDEFAULT}"
252			ash
253			exit 1
254			else
255			echo -e ${COLOREDSTAR}"${COLWHITE}Booting from: $BOOT_DEVICE ...${COLDEFAULT}"
256	niro	96	mount -o ro -t "${FSTYPE}" "${BOOT_DEVICE}" /mnt/mnt/cdrom >/dev/null 2>&1
257
258			# write our boot_device to /mnt/.bootdev for later use (mtab)
259	niro	27	echo "BOOTDEV=${BOOT_DEVICE}" > /mnt/.bootdev
260			echo "FSTYPE=${FSTYPE}" >> /mnt/.bootdev
261
262			if [ -f /mnt/mnt/cdrom/livecdrootfs.cloop ]
263			then
264	niro	96	# mount rootfs (cloop)
265	niro	27	echo -e ${COLOREDSTAR}"${COLWHITE}Mounting cloop system image ...${COLDEFAULT}"
266			echo
267			[ ! -e /dev/cloop ] && mknod /dev/cloop b 240 0
268			insmod /lib/modules/misc/cloop.o file=/mnt/mnt/cdrom/livecdrootfs.cloop > /dev/null
269			mkdir -p /mnt/mnt/cloop
270			mount -o ro -t ext2 /dev/cloop /mnt/mnt/cloop
271			else
272	niro	96	# mount squashfs
273	niro	27	echo -e ${COLOREDSTAR}"${COLWHITE}Mounting squashfs system image ...${COLDEFAULT}"
274			echo
275			[ ! -e /dev/loop0 ] && mknod /dev/loop0 b 7 0
276			mount -o loop,ro -t squashfs /mnt/mnt/cdrom/livecdrootfs.sqsh /mnt/mnt/cloop
277			fi
278	niro	96
279			# symlinking cloop rootfs to /mnt as newroot
280	niro	27	cd /mnt
281	niro	96
282	niro	27	for x in bin sbin lib boot usr opt
283			do
284			ln -s mnt/cloop/${x} ${x}
285			done
286			mkdir -p initrd proc tmp sys var/tmp dev
287			chmod 1777 tmp var/tmp
288	niro	96
289			# make /mnt/dev/console & /mnt/dev/null
290	niro	27	[ ! -e /mnt/dev/console ] && mknod -m 600 /mnt/dev/console c 5 1
291			[ ! -e /mnt/dev/null ] && mknod -m 666 /mnt/dev/null c 1 3
292	niro	96
293	niro	27	(cd /mnt/mnt/cloop; cp -a etc root home var /mnt)
294	niro	96
295			# shurely change to correct permissions
296			chmod 1777 /mnt/tmp
297	niro	27	chmod 1777 /mnt/var/tmp
298	niro	96
299	niro	27	#ash
300	niro	96
301			# set default verbose level for kernel messages
302	niro	27	[ -z "${RC_VERBOSE_LEVEL}" ] && RC_VERBOSE_LEVEL=3
303			echo "${RC_VERBOSE_LEVEL}" > /proc/sys/kernel/printk
304
305			cd /mnt
306	niro	96
307	niro	27	pivot_root . initrd
308
309	niro	96	# dirty but working
310			# umount devpts
311	niro	27	umount -n /initrd/dev/pts &> /dev/null
312	niro	96	# wait a little bit to be safe
313	niro	27	sleep 1
314	niro	96	# umount devfs or udev
315	niro	27	umount -n /initrd/dev &> /dev/null
316	niro	96	# umount sysfs
317	niro	27	umount -n /initrd/sys &> /dev/null
318	niro	96	# umount proc
319	niro	27	umount -n /initrd/proc &> /dev/null
320
321			#debug
322			#/initrd/bin/busybox ash
323	niro	96
324	niro	27	#enter chroot and umount /initrd
325			exec chroot . sh -c 'umount -n /initrd >/dev/null 2>&1;\
326			exec -a init.new /sbin/init'\
327			</dev/console >/dev/console 2>&1
328			fi