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/* 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.cb()
}
err = findNextChangeNotification(h)
if err != nil {
log.Fatalf("Unable to monitor config directory again: %v", err)
}
}
}()
}
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