# limitations under the License.
# usage: mount-latest-subvol
+#
+# Note, at source location, intentionally not executable, run and read
+# install-my-scripts.
+cd /
[[ $EUID == 0 ]] || exec sudo -E "$BASH_SOURCE" "$@"
errcatch() {
tu /etc/fstab <<<"$l"
done
}
+pid-check() {
+ for p in ${pids}; do
+ for m in ${my_pids[@]}; do
+ if (( p == m )); then
+ echo "$0: error: pids to kill includes our pid or a parent. ps output:" >&2
+ ps -f -p $p
+ exit 1
+ fi
+ done
+ done
+}
kill-dir() {
for sig; do
echo kill-dir $sig
if pids=$(timeout 4 lsof -t $dir); then
found_pids=true
timeout 4 lsof -w $dir
+ pid-check
kill -$sig $pids
fi
# fuser will find open sockets that lsof won't, for example from gpg-agent.
# note: -v shows kernel processes, which then doesn't return true when we want
- if timeout 4 fuser -m $dir &>/dev/null; then
+ if pids=$(timeout 4 fuser -m $dir 2>/dev/null); then
+ pid-check
found_pids=true
fuser -$sig -mvk $dir
fi
ret=0
##### begin setup fstab for subvols we care about ######
-first_root_crypt=$(awk '$2 == "/" {print $1}' /etc/mtab)
+root_dev=$(awk '$2 == "/" {print $1}' /etc/mtab)
+if [[ $root_dev == /dev/dm-* ]]; then
+ for d in /dev/mapper/*; do
+ if [[ $(readlink -f $d) == $root_dev ]]; then
+ root_dev=$d
+ break
+ fi
+ done
+fi
+
+if cryptsetup status $root_dev &>/dev/null; then
+ crypt_dev=$root_dev
+else # if we are in a recovery boot, find the next best crypt device
+ noauto=,noauto
+ for dev in $(dmsetup ls --target crypt | awk '{print $1}'); do
+ dev=/dev/mapper/$dev
+ if awk '{print $1}' /etc/mtab | grep -Fx $dev &>/dev/null; then
+ crypt_dev=$dev
+ break
+ fi
+ done
+fi
+
+
fstab <<EOF
-$first_root_crypt /a btrfs noatime,subvol=a 0 0
+$crypt_dev /a btrfs noatime,subvol=a$noauto 0 0
EOF
shopt -s nullglob
f=(/mnt/root/btrbk/q.*)
if [[ -e $f ]]; then
fstab <<EOF
-$first_root_crypt /q btrfs noatime,subvol=q,gid=1000 0 0
-/q/p /p none bind 0 0
+$crypt_dev /q btrfs noatime,subvol=q,gid=1000$noauto 0 0
+/q/p /p none bind$noauto 0 0
EOF
fi
f=(/mnt/root/btrbk/o.*)
if [[ -e $f ]]; then
fstab <<EOF
-$first_root_crypt /o btrfs noatime,subvol=o 0 0
-/o/m /m none bind 0 0
+$crypt_dev /o btrfs noatime,subvol=o$noauto 0 0
+/o/m /m none bind$noauto 0 0
EOF
fi
if [[ $HOSTNAME == frodo ]]; then
fstab <<EOF
-$first_root_crypt /i btrfs noatime,subvol=i 0 0
+$crypt_dev /i btrfs noatime,subvol=i$noauto 0 0
EOF
fi
##### end setup fstab for subvols we care about ######
+# get pids that this program depends on so we dont kill them
+my_pids=($$ $PPID)
+loop_limit=30
+count=0
+while [[ ${my_pids[-1]} != 1 && ${my_pids[-1]} != ${my_pids[-2]} && $count -lt $loop_limit ]]; do
+ count=$((count + 1))
+ p=$(ps -p ${my_pids[-1]} -o ppid=)
+ if [[ $p == 0 || ! $p ]]; then
+ break
+ fi
+ my_pids+=($p)
+done
+
+
for vol in q a o i; do
d=/$vol
if ! awk '{print $2}' /etc/fstab | grep -xF $d &>/dev/null; then
# if latest is already mounted, make sure binds are mounted and move on
- if e check-subvol-stale $d; then
+ e check-subvol-stale $d
+ # populated by check-subvol-stale if stale
+ if ! fresh_snap=$(cat /nocow/btrfs-stale/$vol 2>/dev/null); then
mnt $d
for b in ${binds[@]}; do
mnt $b
continue
fi
- fresh_snap=$(</nocow/btrfs-stale/$vol)
- if [[ ! $fresh_snap ]]; then
- echo "$0: error. empty fresh_snap var"
- ret=1
- continue
- fi
-
umount_ret=true
unmounted=()
for dir in $(echo $d ${binds[*]}\ |tac -s\ ); do