makedist-openmamba/platforms/bootusb/initramfs-include.sh

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2011-05-19 16:02:37 +02:00
FOUND_ISO=
#RAMSIZE=100000 -o "size=${RAMSIZE}k"
msg ":: Creating new root ramdisk (dinamic size=${RAMSIZE}k) on /dev/shm..."
mkdir -p /flash /cdrom /squashfs /newroot
#
# findiso(): looks for ISO9660 images stored in flash root
#
findiso(){
msg ":: Looking for openmamba ISO cdrom images"
# try removable devices only
for i in /flash/openmamba-*.iso; do
/bin/losetup /dev/loop0 $i
if mount -r -t iso9660 /dev/loop0 /cdrom >/dev/null 2>&1; then
if test -r /cdrom/rootfs.compressed; then
msg ":: Valid ISO image $i found..."
FOUND_ISO="$i"
return 0
fi
umount /cdrom
fi
/bin/losetup /dev/loop0
done
return 1
}
#/sbin/splash_util -c repaint ${splash_add} -t default --mesg="Looking for cdrom device" --progress="4444"
while true; do
msg ":: root device is ${root}"
if ! mount -t ext3 ${root} /flash >/dev/null 2>&1; then
if ! mount -t ext2 ${root} /flash >/dev/null 2>&1; then
err ":: Unable to mount USB rootfs. Supported filesystems are ext2 and ext3."
fi
fi
findiso
if [ "$FOUND_ISO" ]; then
# /sbin/splash_util -c repaint ${splash_add} -t default --mesg="Mounting compressed filesystem" --progress="5555"
msg ":: Mounting compressed filesystem"
/bin/losetup /dev/loop1 /cdrom/rootfs.compressed
mount -r -t squashfs /dev/loop1 /squashfs
if [ "${unionfs}" != "off" -a "${unionfs}" != "OFF" ]; then
[ "${unionfs}" = "reset" ] && {
msg ":: Resetting unionfs data in rwroot"
mkdir -p /flash/old
mv /flash/rwroot /flash/old/
}
msg ":: Mounting unionfs"
mkdir -p /flash/rwroot
mount -t unionfs -o dirs=/flash/rwroot=rw:/squashfs=ro unionfs /newroot
mkdir -p /newroot/squashfs /newroot/flash /newroot/cdrom
mount -n -o move /squashfs /newroot/squashfs
mount -n -o move /flash /newroot/flash
mount -n -o move /cdrom /newroot/cdrom
else
msg ":: Creating directories and symlinks on ramdisk..."
/bin/mount -t tmpfs /dev/shm /newroot
mkdir -p \
/newroot/tmp /newroot/proc /newroot/sys \
/newroot/initrd /newroot/mnt /newroot/media \
/newroot/oldroot /newroot/squashfs /newroot/flash \
/newroot/cdrom
mount -n -o move /squashfs /newroot/squashfs
mount -n -o move /flash /newroot/flash
mount -n -o move /cdrom /newroot/cdrom
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 /
fi
# Create empty utmp and wtmp
#:> /newroot/var/run/utmp
#:> /newroot/var/run/wtmp
[ "${init}" ] || init=/sbin/init
msg ":: Running init, runlevel:${runlevel}"
exec run-init /newroot ${init} ${runlevel}
msg ":: Could not run init; opening a command prompt."
/bin/sh.shared
else
msg ":: Could not find a valid ISO image; opening a command prompt."
/bin/sh.shared
fi
done