dracut: fix boot on non-zfs-root systems

Simply prevent overwriting root until it needs to be overwritten. Dracut could change this value before this module is called, but won't change the kernel command line. Reviewed-by: Andrew J. Hesford <[email protected]> Signed-off-by: Toyam Cox <[email protected]> Closes openzfs#13592
andrewc12 · Sep 23, 2022 · cf6525e · cf6525e
1 parent 2197339
commit cf6525e
Showing 1 changed file with 5 additions and 5 deletions.
diff --git a/contrib/dracut/90zfs/zfs-lib.sh.in b/contrib/dracut/90zfs/zfs-lib.sh.in
@@ -88,19 +88,19 @@ decode_root_args() {
         return
     fi
 
-    root=$(getarg root=)
+    xroot=$(getarg root=)
     rootfstype=$(getarg rootfstype=)
 
     # shellcheck disable=SC2249
-    case "$root" in
+    case "$xroot" in
         ""|zfs|zfs:|zfs:AUTO)
             root=zfs:AUTO
             rootfstype=zfs
             return 0
             ;;
 
         ZFS=*|zfs:*)
-            root="${root#zfs:}"
+            root="${xroot#zfs:}"
             root="${root#ZFS=}"
             root=$(echo "$root" | tr '+' ' ')
             rootfstype=zfs
@@ -109,9 +109,9 @@ decode_root_args() {
     esac
 
     if [ "$rootfstype" = "zfs" ]; then
-        case "$root" in
+        case "$xroot" in
             "") root=zfs:AUTO ;;
-            *)  root=$(echo "$root" | tr '+' ' ') ;;
+            *)  root=$(echo "$xroot" | tr '+' ' ') ;;
         esac
         return 0
     fi