Author: Andreas Beckmann <anbe@debian.org>
Description: manage (/usr)/bin/sh in the state file

--- a/update-shells
+++ b/update-shells
@@ -63,19 +63,20 @@ done
 
 PKG_DIR="$ROOT/usr/share/debianutils/shells.d"
 STATE_FILE="$ROOT/var/lib/shells.state"
+TEMPLATE_ETC_FILE="$ROOT/usr/share/debianutils/shells"
 TARGET_ETC_FILE="$ROOT/etc/shells"
 SOURCE_ETC_FILE="$TARGET_ETC_FILE"
 NEW_ETC_FILE="$TARGET_ETC_FILE.tmp"
 NEW_STATE_FILE="$STATE_FILE.tmp"
 
 if ! test -e "$SOURCE_ETC_FILE"; then
-	SOURCE_ETC_FILE="$ROOT/usr/share/debianutils/shells"
+	SOURCE_ETC_FILE="$TEMPLATE_ETC_FILE"
 fi
 
 PKG_SHELLS='#'
 LC_COLLATE=C.UTF-8  # glob in reproducible order
-for f in "$PKG_DIR/"*; do
-	[ "$f" = "$PKG_DIR/*" ] && break
+for f in "$TEMPLATE_ETC_FILE" "$PKG_DIR/"*; do
+	test -f "$f" || continue
 	while IFS='#' read -r line _; do
 		[ -n "$line" ] || continue
 		PKG_SHELLS="$PKG_SHELLS$line#"