+[ -n "$SWITCH_ROOT_TMPFS" ] && {
+ mount none /mnt -t tmpfs
+ ( cd /; find -xdev -type d ) | ( cd /mnt; xargs mkdir -p )
+ find / \! -type d -xdev | tar -cT /proc/self/fd/0 | tar -xC /mnt
+ mkdir /mnt/proc /mnt/dev /mnt/tmp /mnt/sys
+ mount -o move /proc /mnt/proc
+ mount -o move /dev /mnt/dev
+ mount -o move /tmp /mnt/tmp
+ mount -o move /sys /mnt/sys
+ rm -rf /proc /dev /tmp /sys
+ exec switch_root -c /dev/console /mnt /sbin/init
+}
+