various bug fixes

[distro-setup] / mount-latest-subvol

diff --git a/mount-latest-subvol b/mount-latest-subvol
index 2ebcca04be243ec5497ce5cc330444c1ed7e9db4..96210c4424907040ae4f284bf88ae330158d977d 100644 (file)
--- a/mount-latest-subvol
+++ b/mount-latest-subvol
@@ -14,6 +14,9 @@
 # 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" "$@"
@@ -86,7 +89,7 @@ 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" >&2
+        echo "$0: error: pids to kill includes our pid or a parent. ps output:" >&2
         ps -f -p $p
         exit 1
       fi
@@ -126,9 +129,25 @@ 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 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
@@ -140,22 +159,22 @@ 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 ######
@@ -208,6 +227,7 @@ for vol in q a o i; do
     continue
   fi
 
+  # populated by check-subvol-stale
   fresh_snap=$(</nocow/btrfs-stale/$vol)
   if [[ ! $fresh_snap ]]; then
     echo "$0: error. empty fresh_snap var"