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windows: add Find*ChangeNotification APIs for file and directory monitoring

Browse Source 
https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-findfirstchangenotificationw
https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-findnextchangenotification
https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-findclosechangenotification

Change-Id: If7abfd63cd7a60e7f95ffad9aca2b7b7b74c94f0
Reviewed-on: https://go-review.googlesource.com/c/sys/+/285713
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Jason A. Donenfeld
2021-01-22 14:20:47 +01:00
parent 04d7465088
commit a8b976e07c
3 changed files with 45 additions and 1 deletions
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3
windows/syscall_windows.go
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@@ -264,6 +264,9 @@ func NewCallbackCDecl(fn interface{}) uintptr {
//sys VirtualProtect(address uintptr, size uintptr, newprotect uint32, oldprotect *uint32) (err error) = kernel32.VirtualProtect
//sys TransmitFile(s Handle, handle Handle, bytesToWrite uint32, bytsPerSend uint32, overlapped *Overlapped, transmitFileBuf *TransmitFileBuffers, flags uint32) (err error) = mswsock.TransmitFile
//sys ReadDirectoryChanges(handle Handle, buf *byte, buflen uint32, watchSubTree bool, mask uint32, retlen *uint32, overlapped *Overlapped, completionRoutine uintptr) (err error) = kernel32.ReadDirectoryChangesW
//sys FindFirstChangeNotification(path string, watchSubtree bool, notifyFilter uint32) (handle Handle, err error) [failretval==InvalidHandle] = kernel32.FindFirstChangeNotificationW
//sys FindNextChangeNotification(handle Handle) (err error)
//sys FindCloseChangeNotification(handle Handle) (err error)
//sys CertOpenSystemStore(hprov Handle, name *uint16) (store Handle, err error) = crypt32.CertOpenSystemStoreW
//sys CertOpenStore(storeProvider uintptr, msgAndCertEncodingType uint32, cryptProv uintptr, flags uint32, para uintptr) (handle Handle, err error) = crypt32.CertOpenStore
//sys CertEnumCertificatesInStore(store Handle, prevContext *CertContext) (context *CertContext, err error) [failretval==nil] = crypt32.CertEnumCertificatesInStore

2
windows/types_windows.go
View File

@@ -227,7 +227,7 @@ const (
)
const (
// filters for ReadDirectoryChangesW
// filters for ReadDirectoryChangesW and FindFirstChangeNotificationW
FILE_NOTIFY_CHANGE_FILE_NAME = 0x001
FILE_NOTIFY_CHANGE_DIR_NAME = 0x002
FILE_NOTIFY_CHANGE_ATTRIBUTES = 0x004

41
windows/zsyscall_windows.go
View File

@@ -183,9 +183,12 @@ var (
procDuplicateHandle = modkernel32.NewProc("DuplicateHandle")
procExitProcess = modkernel32.NewProc("ExitProcess")
procFindClose = modkernel32.NewProc("FindClose")
procFindCloseChangeNotification = modkernel32.NewProc("FindCloseChangeNotification")
procFindFirstChangeNotificationW = modkernel32.NewProc("FindFirstChangeNotificationW")
procFindFirstFileW = modkernel32.NewProc("FindFirstFileW")
procFindFirstVolumeMountPointW = modkernel32.NewProc("FindFirstVolumeMountPointW")
procFindFirstVolumeW = modkernel32.NewProc("FindFirstVolumeW")
procFindNextChangeNotification = modkernel32.NewProc("FindNextChangeNotification")
procFindNextFileW = modkernel32.NewProc("FindNextFileW")
procFindNextVolumeMountPointW = modkernel32.NewProc("FindNextVolumeMountPointW")
procFindNextVolumeW = modkernel32.NewProc("FindNextVolumeW")
@@ -1525,6 +1528,36 @@ func FindClose(handle Handle) (err error) {
return
}
func FindCloseChangeNotification(handle Handle) (err error) {
r1, _, e1 := syscall.Syscall(procFindCloseChangeNotification.Addr(), 1, uintptr(handle), 0, 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func FindFirstChangeNotification(path string, watchSubtree bool, notifyFilter uint32) (handle Handle, err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(path)
if err != nil {
return
}
return _FindFirstChangeNotification(_p0, watchSubtree, notifyFilter)
}
func _FindFirstChangeNotification(path *uint16, watchSubtree bool, notifyFilter uint32) (handle Handle, err error) {
var _p1 uint32
if watchSubtree {
_p1 = 1
}
r0, _, e1 := syscall.Syscall(procFindFirstChangeNotificationW.Addr(), 3, uintptr(unsafe.Pointer(path)), uintptr(_p1), uintptr(notifyFilter))
handle = Handle(r0)
if handle == InvalidHandle {
err = errnoErr(e1)
}
return
}
func findFirstFile1(name *uint16, data *win32finddata1) (handle Handle, err error) {
r0, _, e1 := syscall.Syscall(procFindFirstFileW.Addr(), 2, uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(data)), 0)
handle = Handle(r0)
@@ -1552,6 +1585,14 @@ func FindFirstVolume(volumeName *uint16, bufferLength uint32) (handle Handle, er
return
}
func FindNextChangeNotification(handle Handle) (err error) {
r1, _, e1 := syscall.Syscall(procFindNextChangeNotification.Addr(), 1, uintptr(handle), 0, 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func findNextFile1(handle Handle, data *win32finddata1) (err error) {
r1, _, e1 := syscall.Syscall(procFindNextFileW.Addr(), 2, uintptr(handle), uintptr(unsafe.Pointer(data)), 0)
if r1 == 0 {