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64 lines
1.7 KiB
64 lines
1.7 KiB
#!/bin/sh
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# root_env="/real-root"
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# init="/init"
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#
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# mkdir -pv "$root_env"
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# if mount -v -t aufs aufs "$root_env" -o br:/=rw ; then
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#
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# # having a world writeable top directory in an aufs branch
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# # may be a security issue
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# chmod 0700 "$root_env"
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#
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# mount --move /proc "$root_env"/proc
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# mount --move /sys "$root_env"/sys
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# # remove left-over lines from /etc/mtab
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# # umount /proc /sys 2>/dev/null
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#
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# cd "$root_env"
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# # /etc/mtab and "$root_env"/etc/mtab are the same file
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# sed -i -e "s,/*$root_env/*,/,g" etc/mtab
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#
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# exec chroot . sh -c "exec $init" <dev/console >dev/console 2>&1
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# fi
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mkdir -p /mnt/{media,image,overlay}
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# Find the drive with the disc containing 2nd stage images, in case there is
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# more than one drive installed.
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foundcdrom=0
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aufsopt="br:/real-root=rw"
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for cdromdev in /dev/cdroms/* ; do
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[ -e $cdromdev ] || continue
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if mount $cdromdev /mnt/media -o ro ; then
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if [ ! -f /mnt/media/*/2nd_stage-livecd.img ] ; then
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umount /mnt/media
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continue
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fi
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if [ -f /mnt/media/*/2nd_stage-overlay.img ] ; then
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mount /mnt/media/*/2nd_stage-overlay.img /mnt/overlay -o loop
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aufsopt="$aufsopt:/mnt/overlay=ro"
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fi
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mount /mnt/media/*/2nd_stage-livecd.img /mnt/image -o loop
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aufsopt="$aufsopt:/mnt/image=ro"
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foundcdrom=1
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break
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fi
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done
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if [ $foundcdrom = 1 ] ; then
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mount -t tmpfs tmpfs /real-root
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# Files from branches listed first in the mount option hide files with the same
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# name in later branches. The first branch listed must be writeable or the whole
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# directory that aufs is mounted on becomes read-only.
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mount -t aufs aufs /real-root -o $aufsopt
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mkdir -p /real-root/mnt/{media,image,overlay}
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for x in media image overlay ; do
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mount --move /mnt/$x /real-root/mnt/$x
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done
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fi
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