1 files changed, 59 insertions, 0 deletions
diff --git a/conf/storewatcher_windows.go b/conf/storewatcher_windows.go
new file mode 100644
index 00000000..f3f38fef
--- /dev/null
+++ b/conf/storewatcher_windows.go
@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
+ */
+
+package conf
+
+import (
+	"golang.org/x/sys/windows"
+	"log"
+)
+
+const (
+	fncFILE_NAME   uint32 = 0x00000001
+	fncDIR_NAME    uint32 = 0x00000002
+	fncATTRIBUTES  uint32 = 0x00000004
+	fncSIZE        uint32 = 0x00000008
+	fncLAST_WRITE  uint32 = 0x00000010
+	fncLAST_ACCESS uint32 = 0x00000020
+	fncCREATION    uint32 = 0x00000040
+	fncSECURITY    uint32 = 0x00000100
+)
+
+//sys findFirstChangeNotification(path *uint16, watchSubtree bool, filter uint32) (handle windows.Handle, err error) = kernel32.FindFirstChangeNotificationW
+//sys findNextChangeNotification(handle windows.Handle) (err error) = kernel32.FindNextChangeNotification
+
+var haveStartedWatchingConfigDir bool
+
+func startWatchingConfigDir() {
+	if haveStartedWatchingConfigDir {
+		return
+	}
+	haveStartedWatchingConfigDir = true
+	go func() {
+		configFileDir, err := resolveConfigFileDir()
+		if err != nil {
+			return
+		}
+		h, err := findFirstChangeNotification(windows.StringToUTF16Ptr(configFileDir), true, fncFILE_NAME|fncDIR_NAME|fncATTRIBUTES|fncSIZE|fncLAST_WRITE|fncLAST_ACCESS|fncCREATION|fncSECURITY)
+		if err != nil {
+			log.Fatalf("Unable to monitor config directory: %v", err)
+		}
+		for {
+			s, err := windows.WaitForSingleObject(h, windows.INFINITE)
+			if err != nil || s == windows.WAIT_FAILED {
+				log.Fatalf("Unable to wait on config directory watcher: %v", err)
+			}
+
+			for _, cb := range storeCallbacks {
+				cb()
+			}
+
+			err = findNextChangeNotification(h)
+			if err != nil {
+				log.Fatalf("Unable to monitor config directory again: %v", err)
+			}
+		}
+	}()
+}