reactos/base/shell/explorer/shell/winfs.cpp

   1 /*
   2  * Copyright 2003, 2004, 2005 Martin Fuchs
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19
  20  //
  21  // Explorer clone
  22  //
  23  // winfs.cpp
  24  //
  25  // Martin Fuchs, 23.07.2003
  26  //
  27
  28
  29 #include <precomp.h>
  30
  31 #ifndef _NO_WIN_FS
  32
  33 //#include "winfs.h"
  34
  35
  36 int ScanNTFSStreams(Entry* entry, HANDLE hFile)
  37 {
  38         PVOID ctx = 0;
  39         DWORD read, seek_high;
  40         Entry** pnext = &entry->_down;
  41         int cnt = 0;
  42
  43         for(;;) {
  44                 struct NTFS_StreamHdr : public WIN32_STREAM_ID {
  45                         WCHAR name_padding[_MAX_FNAME]; // room for reading stream name
  46                 } hdr;
  47
  48                 if (!BackupRead(hFile, (LPBYTE)&hdr, (LPBYTE)&hdr.cStreamName-(LPBYTE)&hdr, &read, FALSE, FALSE, &ctx) ||
  49                         (long)read!=(LPBYTE)&hdr.cStreamName-(LPBYTE)&hdr)
  50                         break;
  51
  52                 if (hdr.dwStreamId == BACKUP_ALTERNATE_DATA) {
  53                         if (hdr.dwStreamNameSize &&
  54                                 BackupRead(hFile, (LPBYTE)hdr.cStreamName, hdr.dwStreamNameSize, &read, FALSE, FALSE, &ctx) &&
  55                                 read==hdr.dwStreamNameSize)
  56                         {
  57                                 ++cnt;
  58
  59                                 int l = hdr.dwStreamNameSize / sizeof(WCHAR);
  60                                 LPCWSTR p = hdr.cStreamName;
  61                                 LPCWSTR e = hdr.cStreamName + l;
  62
  63                                 if (l>0 && *p==':') {
  64                                         ++p, --l;
  65
  66                                         e = p;
  67
  68                                         while(l>0 && *e!=':')
  69                                                 ++e, --l;
  70
  71                                         l = e - p;
  72                                 }
  73
  74                                 Entry* stream_entry = new WinEntry(entry);
  75
  76                                 memcpy(&stream_entry->_data, &entry->_data, sizeof(WIN32_FIND_DATA));
  77                                 lstrcpy(stream_entry->_data.cFileName, String(p, l));
  78
  79                                 stream_entry->_down = NULL;
  80                                 stream_entry->_expanded = false;
  81                                 stream_entry->_scanned = false;
  82                                 stream_entry->_level = entry->_level + 1;
  83
  84                                 *pnext = stream_entry;
  85                                 pnext = &stream_entry->_next;
  86                         }
  87                 }
  88
  89                  // jump to the next stream header
  90                 if (!BackupSeek(hFile, ~0, ~0, &read, &seek_high, &ctx)) {
  91                         DWORD error = GetLastError();
  92
  93                         if (error != ERROR_SEEK) {
  94                                 BackupRead(hFile, 0, 0, &read, TRUE, FALSE, &ctx);      // terminate BackupRead() loop
  95                                 THROW_EXCEPTION(error);
  96                                 //break;
  97                         }
  98
  99                         hdr.Size.QuadPart -= read;
 100                         hdr.Size.HighPart -= seek_high;
 101
 102                         BYTE buffer[4096];
 103
 104                         while(hdr.Size.QuadPart > 0) {
 105                                 if (!BackupRead(hFile, buffer, sizeof(buffer), &read, FALSE, FALSE, &ctx) || read!=sizeof(buffer))
 106                                         break;
 107
 108                                 hdr.Size.QuadPart -= read;
 109                         }
 110                 }
 111         }
 112
 113         if (ctx)
 114                 if (!BackupRead(hFile, 0, 0, &read, TRUE, FALSE, &ctx)) // terminate BackupRead() loop
 115                         THROW_EXCEPTION(GetLastError());
 116
 117         return cnt;
 118 }
 119
 120
 121 void WinDirectory::read_directory(int scan_flags)
 122 {
 123         CONTEXT("WinDirectory::read_directory()");
 124
 125         int level = _level + 1;
 126
 127         Entry* first_entry = NULL;
 128         Entry* last = NULL;
 129         Entry* entry;
 130
 131         LPCTSTR path = (LPCTSTR)_path;
 132         TCHAR buffer[MAX_PATH], *pname;
 133         for(pname=buffer; *path; )
 134                 *pname++ = *path++;
 135
 136         lstrcpy(pname, TEXT("\\*"));
 137
 138         WIN32_FIND_DATA w32fd;
 139         HANDLE hFind = FindFirstFile(buffer, &w32fd);
 140
 141         if (hFind != INVALID_HANDLE_VALUE) {
 142                 do {
 143                         lstrcpy(pname+1, w32fd.cFileName);
 144
 145                         if (w32fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
 146                                 entry = new WinDirectory(this, buffer);
 147                         else
 148                                 entry = new WinEntry(this);
 149
 150                         if (!first_entry)
 151                                 first_entry = entry;
 152
 153                         if (last)
 154                                 last->_next = entry;
 155
 156                         memcpy(&entry->_data, &w32fd, sizeof(WIN32_FIND_DATA));
 157                         entry->_level = level;
 158
 159                          // display file type names, but don't hide file extensions
 160                         g_Globals._ftype_mgr.set_type(entry, true);
 161
 162                         if (!(scan_flags & SCAN_DONT_ACCESS)) {
 163                                 HANDLE hFile = CreateFile(buffer, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
 164                                                                                         0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
 165
 166                                 if (hFile != INVALID_HANDLE_VALUE) {
 167                                         if (GetFileInformationByHandle(hFile, &entry->_bhfi))
 168                                                 entry->_bhfi_valid = true;
 169
 170                                         if (ScanNTFSStreams(entry, hFile))
 171                                                 entry->_scanned = true; // There exist named NTFS sub-streams in this file.
 172
 173                                         CloseHandle(hFile);
 174                                 }
 175                         }
 176
 177                         last = entry;   // There is always at least one entry, because FindFirstFile() succeeded and we don't filter the file entries.
 178                 } while(FindNextFile(hFind, &w32fd));
 179
 180                 if (last)
 181                         last->_next = NULL;
 182
 183                 FindClose(hFind);
 184         }
 185
 186         _down = first_entry;
 187         _scanned = true;
 188 }
 189
 190
 191 const void* WinDirectory::get_next_path_component(const void* p) const
 192 {
 193         LPCTSTR s = (LPCTSTR) p;
 194
 195         while(*s && *s!=TEXT('\\') && *s!=TEXT('/'))
 196                 ++s;
 197
 198         while(*s==TEXT('\\') || *s==TEXT('/'))
 199                 ++s;
 200
 201         if (!*s)
 202                 return NULL;
 203
 204         return s;
 205 }
 206
 207
 208 Entry* WinDirectory::find_entry(const void* p)
 209 {
 210         LPCTSTR name = (LPCTSTR)p;
 211
 212         for(Entry*entry=_down; entry; entry=entry->_next) {
 213                 LPCTSTR p = name;
 214                 LPCTSTR q = entry->_data.cFileName;
 215
 216                 do {
 217                         if (!*p || *p==TEXT('\\') || *p==TEXT('/'))
 218                                 return entry;
 219                 } while(tolower(*p++) == tolower(*q++));
 220
 221                 p = name;
 222                 q = entry->_data.cAlternateFileName;
 223
 224                 do {
 225                         if (!*p || *p==TEXT('\\') || *p==TEXT('/'))
 226                                 return entry;
 227                 } while(tolower(*p++) == tolower(*q++));
 228         }
 229
 230         return NULL;
 231 }
 232
 233
 234  // get full path of specified directory entry
 235 bool WinEntry::get_path(PTSTR path, size_t path_count) const
 236 {
 237         return get_path_base(path, path_count, ET_WINDOWS);
 238 }
 239
 240 ShellPath WinEntry::create_absolute_pidl() const
 241 {
 242         CONTEXT("WinEntry::create_absolute_pidl()");
 243
 244         TCHAR path[MAX_PATH];
 245
 246         if (get_path(path, COUNTOF(path)))
 247                 return ShellPath(path);
 248
 249         return ShellPath();
 250 }
 251
 252 #endif // _NO_WIN_FS