From 4a17cf66a31510b36fccf205216d435ab8bf8826 Mon Sep 17 00:00:00 2001
From: Andrey Petelin <am.petelin@gmail.com>
Date: Sun, 14 Sep 2025 09:26:26 +0500
Subject: [PATCH] refactor: Add file existence checks and improve startup
 reliability

---
 podkop/files/usr/bin/podkop | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/podkop/files/usr/bin/podkop b/podkop/files/usr/bin/podkop
index 965bba0..bd83231 100755
--- a/podkop/files/usr/bin/podkop
+++ b/podkop/files/usr/bin/podkop
@@ -1,8 +1,25 @@
 #!/bin/ash
 
-[ -r /lib/functions.sh ] && . /lib/functions.sh
-[ -r /lib/config/uci.sh ] && . /lib/config/uci.sh
+check_required_file() {
+    local file="$1"
+
+    if [ ! -r "$file" ]; then
+        echo "Error: required file '$file' is missing or not readable" >&2
+        exit 1
+    fi
+}
+
 PODKOP_LIB="/usr/lib/podkop"
+check_required_file /lib/functions.sh
+check_required_file /lib/config/uci.sh
+check_required_file "$PODKOP_LIB/constants.sh"
+check_required_file "$PODKOP_LIB/nft.sh"
+check_required_file "$PODKOP_LIB/helpers.sh"
+check_required_file "$PODKOP_LIB/sing_box_config_manager.sh"
+check_required_file "$PODKOP_LIB/sing_box_config_facade.sh"
+check_required_file "$PODKOP_LIB/logging.sh"
+. /lib/config/uci.sh
+. /lib/functions.sh
 . "$PODKOP_LIB/constants.sh"
 . "$PODKOP_LIB/nft.sh"
 . "$PODKOP_LIB/helpers.sh"