pivot() { # <new_root> <old_root>
mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1
mkdir -p $1$2 $1/proc $1/sys $1/dev $1/tmp $1/overlay && \
- mount -o move /proc $1/proc && \
+ mount -o noatime,move /proc $1/proc && \
pivot_root $1 $1$2 || {
umount $1 $1
return 1
}
- mount -o move $2/sys /sys
- mount -o move $2/dev /dev
- mount -o move $2/tmp /tmp
- mount -o move $2/overlay /overlay 2>&-
+ mount -o noatime,move $2/sys /sys
+ mount -o noatime,move $2/dev /dev
+ mount -o noatime,move $2/tmp /tmp
+ mount -o noatime,move $2/overlay /overlay 2>&-
return 0
}
umount -l /mnt
grep /overlay /proc/mounts > /dev/null && {
- mount -o remount,ro /overlay
+ mount -o noatime,remount,ro /overlay
umount -l /overlay
}