99fs-lib/fs-lib.sh: accept "UUID=" and "LABEL=" for fsck_single

with the reuse of crypt-lib.sh devnames() and putting it in
dracut-lib.sh, fsck_single() can use more generic names from /etc/fstab

modules.d/90crypt/crypt-lib.sh

@@ -100,43 +100,6 @@ test_dev() {
     return $ret
 }
 
-# Get kernel name for given device.  Device may be the name too (then the same
-# is returned), a symlink (full path), UUID (prefixed with "UUID=") or label
-# (prefixed with "LABEL=").  If just a beginning of the UUID is specified or
-# even an empty, function prints all device names which UUIDs match - every in
-# single line.
-#
-# NOTICE: The name starts with "/dev/".
-#
-# Example:
-#   devnames UUID=123
-# May print:
-#   /dev/dm-1
-#   /dev/sdb1
-#   /dev/sdf3
-devnames() {
-    local dev="$1"; local d; local names
-
-    case "$dev" in
-    UUID=*)
-        dev="$(foreach_uuid_until '! blkid -U $___' "${dev#UUID=}")" \
-            && return 255
-        [ -z "$dev" ] && return 255
-        ;;
-    LABEL=*) dev="$(blkid -L "${dev#LABEL=}")" || return 255 ;;
-    /dev/?*) ;;
-    *) return 255 ;;
-    esac
-
-    for d in $dev; do
-        names="$names
-$(readlink -e -q "$d")" || return 255
-    done
-
-    echo "${names#
-}"
-}
-
 # match_dev devpattern dev
 #
 # Returns true if 'dev' matches 'devpattern'.  Both 'devpattern' and 'dev' are

modules.d/99base/dracut-lib.sh

@@ -555,6 +555,44 @@ foreach_uuid_until() (
     return 1
 )
 
+# Get kernel name for given device.  Device may be the name too (then the same
+# is returned), a symlink (full path), UUID (prefixed with "UUID=") or label
+# (prefixed with "LABEL=").  If just a beginning of the UUID is specified or
+# even an empty, function prints all device names which UUIDs match - every in
+# single line.
+#
+# NOTICE: The name starts with "/dev/".
+#
+# Example:
+#   devnames UUID=123
+# May print:
+#   /dev/dm-1
+#   /dev/sdb1
+#   /dev/sdf3
+devnames() {
+    local dev="$1"; local d; local names
+
+    case "$dev" in
+    UUID=*)
+        dev="$(foreach_uuid_until '! blkid -U $___' "${dev#UUID=}")" \
+            && return 255
+        [ -z "$dev" ] && return 255
+        ;;
+    LABEL=*) dev="$(blkid -L "${dev#LABEL=}")" || return 255 ;;
+    /dev/?*) ;;
+    *) return 255 ;;
+    esac
+
+    for d in $dev; do
+        names="$names
+$(readlink -e -q "$d")" || return 255
+    done
+
+    echo "${names#
+}"
+}
+
+
 usable_root() {
     local _d
     [ -d $1 ] || return 1

modules.d/99fs-lib/fs-lib.sh

@@ -184,7 +184,9 @@ fsck_single() {
     local _drv
 
     [ $# -lt 2 ] && return 255
-
+    # if UUID= marks more than one device, take only the first one
+    [ -e "$_dev" ] || _dev=$(devnames "$_dev"| while read line; do if [ -n "$line" ]; then echo $line; break;fi;done)
+    [ -e "$_dev" ] || return 255
     _fs=$(det_fs "$_dev" "$_fs")
     fsck_able "$_fs" || return 255