libguestfs/mount-rootfs-and-chroot.sh

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#!/bin/bash
# Usage: $0 /dev/sda5
rootfs=$1
mnt=/sysroot
mounts=
if test -b "${rootfs}"
then
mkdir -v -p "${mnt}"
if mount -v "${rootfs}" "${mnt}"
then
for i in dev dev/pts proc sys selinux
do
if test -d /${i} && test -d "${mnt}/${i}" && test "`stat -c %D /`" != "`stat -c %D ${i}`"
then
mount -v --bind /${i} "${mnt}/${i}"
fi
done
chroot "${mnt}" su -
while read b m rest
do
case "${m}" in
${mnt}*)
mounts="${m} ${mounts}"
;;
esac
done <<-EOF
`
cat < /proc/mounts
`
EOF
for i in ${mounts}
do
umount -v "${i}"
done
fi
fi