From 403c1f8fa17f5bfe6487e9df13aa627f3afc6387 Mon Sep 17 00:00:00 2001
From: Siyuan <siyuan@buildjet.com>
Date: Fri, 10 Oct 2025 15:16:21 +0000
Subject: [PATCH] fix: ensure symlink to last-crash.log

---
 cmd/main.go | 25 +++++++++++++++++++++++++
 display.go  |  9 +++++----
 2 files changed, 30 insertions(+), 4 deletions(-)

diff --git a/cmd/main.go b/cmd/main.go
index 59033c47..4494e280 100644
--- a/cmd/main.go
+++ b/cmd/main.go
@@ -117,6 +117,29 @@ func supervise() error {
 	return nil
 }
 
+func isSymlinkTo(dst, src string) bool {
+	file, err := os.Stat(dst)
+	if err != nil {
+		return false
+	}
+	if file.Mode()&os.ModeSymlink != os.ModeSymlink {
+		return false
+	}
+	target, err := os.Readlink(dst)
+	if err != nil {
+		return false
+	}
+	return target == src
+}
+
+func ensureSymlink(dst, src string) error {
+	if isSymlinkTo(dst, src) {
+		return nil
+	}
+	_ = os.Remove(dst)
+	return os.Symlink(src, dst)
+}
+
 func createErrorDump(logFile *os.File) {
 	logFile.Close()
 
@@ -160,6 +183,8 @@ func createErrorDump(logFile *os.File) {
 	}
 
 	fmt.Printf("error dump created: %s\n", filePath)
+
+	ensureSymlink(filePath, filepath.Join(errorDumpDir, "last-crash.log"))
 }
 
 func doSupervise() {
diff --git a/display.go b/display.go
index 99ad5548..9ec4296f 100644
--- a/display.go
+++ b/display.go
@@ -35,14 +35,15 @@ func switchToMainScreen() {
 }
 
 func updateDisplay() {
-	nativeInstance.UpdateLabelIfChanged("home_info_ipv4_addr", networkManager.IPv4String())
-	nativeInstance.UpdateLabelAndChangeVisibility("home_info_ipv6_addr", networkManager.IPv6String())
+	if networkManager != nil {
+		nativeInstance.UpdateLabelIfChanged("home_info_ipv4_addr", networkManager.IPv4String())
+		nativeInstance.UpdateLabelAndChangeVisibility("home_info_ipv6_addr", networkManager.IPv6String())
+		nativeInstance.UpdateLabelIfChanged("home_info_mac_addr", networkManager.MACString())
+	}
 
 	_, _ = nativeInstance.UIObjHide("menu_btn_network")
 	_, _ = nativeInstance.UIObjHide("menu_btn_access")
 
-	nativeInstance.UpdateLabelIfChanged("home_info_mac_addr", networkManager.MACString())
-
 	switch config.NetworkConfig.DHCPClient.String {
 	case "jetdhcpc":
 		nativeInstance.UpdateLabelIfChanged("dhcp_client_change_label", "Change to udhcpc")