reactos/lib/kernel32/file/cnotify.c

   1 /* $Id: cnotify.c,v 1.6 2003/06/07 16:16:39 chorns Exp $
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS system libraries
   5  * FILE:            lib/kernel32/file/find.c
   6  * PURPOSE:         Find functions
   7  * PROGRAMMER:      Ariadne ( ariadne@xs4all.nl)
   8  * UPDATE HISTORY:
   9  *                  Created 01/11/98
  10  */
  11
  12 #include <k32.h>
  13
  14 #define NDEBUG
  15 #include <kernel32/kernel32.h>
  16
  17 WINBOOL STDCALL
  18 FindCloseChangeNotification (HANDLE hChangeHandle)
  19 {
  20    NtClose(hChangeHandle);
  21    return TRUE;
  22 }
  23
  24
  25 HANDLE
  26 STDCALL
  27 FindFirstChangeNotificationA (
  28         LPCSTR  lpPathName,
  29         WINBOOL bWatchSubtree,
  30         DWORD   dwNotifyFilter
  31         )
  32 {
  33         UNICODE_STRING PathNameU;
  34         ANSI_STRING PathName;
  35         HANDLE hNotify;
  36
  37         RtlInitAnsiString (&PathName,
  38                            (LPSTR)lpPathName);
  39
  40         /* convert ansi (or oem) string to unicode */
  41         if (bIsFileApiAnsi)
  42    {
  43                 RtlAnsiStringToUnicodeString (&PathNameU,
  44                                               &PathName,
  45                                               TRUE);
  46    }
  47         else
  48    {
  49                 RtlOemStringToUnicodeString (&PathNameU,
  50                                              &PathName,
  51                                              TRUE);
  52    }
  53
  54    hNotify = FindFirstChangeNotificationW (PathNameU.Buffer,
  55                                                 bWatchSubtree,
  56                                                 dwNotifyFilter);
  57
  58    RtlFreeUnicodeString(&PathNameU);
  59
  60    return hNotify;
  61 }
  62
  63
  64 HANDLE
  65 STDCALL
  66 FindFirstChangeNotificationW (
  67         LPCWSTR lpPathName,
  68         WINBOOL bWatchSubtree,
  69         DWORD   dwNotifyFilter
  70         )
  71 {
  72    NTSTATUS Status;
  73    UNICODE_STRING NtPathU;
  74    IO_STATUS_BLOCK IoStatus;
  75    OBJECT_ATTRIBUTES ObjectAttributes;
  76    HANDLE hDir;
  77
  78    /*
  79    RtlDosPathNameToNtPathName takes a fully qualified file name "C:\Projects\LoadLibrary\Debug\TestDll.dll"
  80    and returns something like "\??\C:\Projects\LoadLibrary\Debug\TestDll.dll."
  81    If the file name cannot be interpreted, then the routine returns STATUS_OBJECT_PATH_SYNTAX_BAD and
  82    ends execution.
  83    */
  84
  85    if (!RtlDosPathNameToNtPathName_U ((LPWSTR)lpPathName,
  86                                           &NtPathU,
  87                                           NULL,
  88                                           NULL))
  89    {
  90       SetLastErrorByStatus(STATUS_OBJECT_PATH_SYNTAX_BAD);
  91       return INVALID_HANDLE_VALUE;
  92    }
  93
  94    InitializeObjectAttributes (&ObjectAttributes,
  95                                &NtPathU,
  96                                0,
  97                                NULL,
  98                                NULL);
  99
 100    Status = NtOpenFile (hDir,
 101                         SYNCHRONIZE|FILE_LIST_DIRECTORY,
 102                         &ObjectAttributes,
 103                         &IoStatus,
 104                         FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
 105                         FILE_DIRECTORY_FILE);
 106
 107    if (!NT_SUCCESS(Status))
 108    {
 109       SetLastErrorByStatus(Status);
 110       return INVALID_HANDLE_VALUE;
 111    }
 112
 113    Status = NtNotifyChangeDirectoryFile(hDir,
 114                                         NULL,
 115                                         NULL,
 116                                         NULL,
 117                                         &IoStatus,
 118                                         NULL,//Buffer,
 119                                         0,//BufferLength,
 120                                         dwNotifyFilter,
 121                                         bWatchSubtree);
 122    if (!NT_SUCCESS(Status))
 123    {
 124       SetLastErrorByStatus(Status);
 125       return INVALID_HANDLE_VALUE;
 126    }
 127
 128    return hDir;
 129 }
 130
 131
 132 WINBOOL
 133 STDCALL
 134 FindNextChangeNotification (
 135         HANDLE  hChangeHandle
 136         )
 137 {
 138    IO_STATUS_BLOCK IoStatus;
 139    NTSTATUS Status;
 140
 141    Status = NtNotifyChangeDirectoryFile(hChangeHandle,
 142                                         NULL,
 143                                         NULL,
 144                                         NULL,
 145                                         &IoStatus,
 146                                         NULL,//Buffer,
 147                                         0,//BufferLength,
 148                                         FILE_NOTIFY_CHANGE_SECURITY,//meaningless for subsequent calls, but must contain a valid flag(s)
 149                                         0//meaningless for subsequent calls
 150                                         );
 151    if (!NT_SUCCESS(Status))
 152    {
 153       SetLastErrorByStatus(Status);
 154       return FALSE;
 155    }
 156
 157    return TRUE;
 158 }
 159
 160 /* EOF */