dracut-functions: make inst() mkinitrd compatible

diff --git a/dracut-functions b/dracut-functions
index 6009ace..acc9da9 100755 (executable)
--- a/dracut-functions
+++ b/dracut-functions
@@ -260,10 +260,11 @@ inst_rules() {
 # general purpose installation function
 # Same args as above.
 inst() {
-    if (($# != 1 && $# != 2 )); then
-        derror "inst only takes 1 or 2 arguments"
+    if (($# != 1 && $# != 2 && $# != 3 )); then
+        derror "inst only takes 1 or 2 or 3 arguments"
        exit 1
     fi
+    [[ "$2" = "$initdir" ]] && set $1 $3
     for x in inst_symlink inst_script inst_binary inst_simple; do
        $x "$@" && return 0
     done