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