makedist-openmamba/platforms/testcd/initramfs-include.sh
2011-05-19 16:02:37 +02:00

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FOUND_ROOTFS=
#RAMSIZE=256144 -o "size=${RAMSIZE}k"
msg ":: Creating new root ramdisk (dinamic size=${RAMSIZE}k) on /dev/shm..."
mkdir /newroot
/bin/mount -t tmpfs /dev/shm /newroot
mkdir /newroot/cdrom /newroot/squashfs
#
# findcdrom(): looks for cdrom devices and mounts them to detect compressed fs
#
findcdrom(){
msg ":: Looking for cdrom device(s)"
# try removable devices only
for i in /sys/block/*/removable; do
removable=`cat $i`
if [ "$removable" = "1" ]; then
dev=${i%/removable}
dev=/dev/${dev#/sys/block/}
if mount -r -t iso9660 $dev /newroot/cdrom >/dev/null 2>&1; then
if test -r /newroot/cdrom/rootfs.compressed; then
msg ":: Compressed root filesystem found on $dev..."
FOUND_ROOTFS="$dev"
return 0
fi
umount /newroot/cdrom
fi
fi
done
return 1
}
#/sbin/splash_util -c repaint ${splash_add} -t default --mesg="Looking for cdrom device" --progress="4444"
while true; do
findcdrom
if [ "$FOUND_ROOTFS" ]; then
# /sbin/splash_util -c repaint ${splash_add} -t default --mesg="Mounting compressed filesystem" --progress="5555"
msg ":: Mounting compressed filesystem"
/bin/losetup /dev/loop0 /newroot/cdrom/rootfs.compressed
mount -r -t squashfs /dev/loop0 /newroot/squashfs
msg ":: Creating directories and symlinks on ramdisk..."
mkdir -p \
/newroot/tmp /newroot/proc /newroot/sys \
/newroot/initrd /newroot/mnt /newroot/media \
/newroot/oldroot
ln -s squashfs/bin /newroot/bin
ln -s squashfs/boot /newroot/boot
ln -s squashfs/lib /newroot/lib
ln -s squashfs/opt /newroot/opt
ln -s squashfs/sbin /newroot/sbin
ln -s squashfs/srv /newroot/srv
ln -s squashfs/usr /newroot/usr
chroot /newroot /bin/cp -a \
/squashfs/dev /squashfs/home /squashfs/var \
/squashfs/etc /squashfs/root /
# Create empty utmp and wtmp
:> /newroot/var/run/utmp
:> /newroot/var/run/wtmp
[ "${init}" ] || init=/sbin/init
[ "${debug_initramfs}" ] && {
echo "Opening an initramfs command prompt. Type 'exit' to continue boot."
/bin/sh.shared
}
msg ":: Running init, runlevel:${runlevel}"
exec run-init /newroot ${init} ${runlevel}
exit 0
else
msg ":: Could not find compressed root filesystem. image; opening a command prompt."
/bin/sh.shared
fi
done