Harden Docker ownership startup

docker-entrypoint.sh

@@ -1,13 +1,6 @@
 #!/bin/sh
 set -eu
 
-is_true() {
-    case "$(printf '%s' "${1:-}" | tr '[:upper:]' '[:lower:]')" in
-        1 | true | yes | on) return 0 ;;
-        *) return 1 ;;
-    esac
-}
-
 is_integer() {
     case "${1:-}" in
         '' | *[!0-9]*) return 1 ;;
@@ -15,6 +8,14 @@ is_integer() {
     esac
 }
 
+chown_path() {
+    owner="$1"
+    path="$2"
+    if ! chown "$owner" "$path"; then
+        echo "Warning: could not change ownership of $path to $owner; continuing." >&2
+    fi
+}
+
 run_as_requested_user() {
     uid="${USER_UID:-}"
     gid="${USER_GID:-}"
@@ -34,7 +35,9 @@ run_as_requested_user() {
     fi
 
     mkdir -p /app/.kaizoku/home
-    chown "$uid:$gid" /downloads /jellyfin/tv /jellyfin/movies /app/.kaizoku /app/.kaizoku/home
+    for path in /downloads /jellyfin/tv /jellyfin/movies /app/.kaizoku /app/.kaizoku/home; do
+        chown_path "$uid:$gid" "$path"
+    done
 
     cd /app
     exec setpriv \