base/applications/regedit/regedit.c

   1 /*
   2  * Windows regedit.exe registry editor implementation.
   3  *
   4  * Copyright (C) 2002 Andriy Palamarchuk
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  19  */
  20
  21 #include <regedit.h>
  22
  23
  24 static const LPCWSTR usage =
  25     L"Usage:\n"
  26     L"    regedit filenames\n"
  27     L"    regedit /E filename [regpath]\n"
  28     L"    regedit /D regpath\n"
  29     L"\n"
  30     L"filenames - List of registry files names\n"
  31     L"filename  - Registry file name\n"
  32     L"regpath   - Name of the registry key\n"
  33     L"\n"
  34     L"When is called without any switches adds contents of the specified\n"
  35     L"registry files to the registry.\n"
  36     L"\n"
  37     L"Switches:\n"
  38     L"    /E - Exports contents of the specified registry key to the specified\n"
  39     L"         file. Exports the whole registry if no key is specified.\n"
  40     L"    /D - Deletes specified registry key\n"
  41     L"    /S - Silent execution, can be used with any other switch.\n"
  42     L"         The only existing mode, exists for compatibility with Windows regedit.\n"
  43     L"    /V - Advanced mode, can be used with any other switch.\n"
  44     L"         Ignored, exists for compatibility with Windows regedit.\n"
  45     L"    /L - Location of system.dat file. Can be used with any other switch.\n"
  46     L"         Ignored. Exists for compatibility with Windows regedit.\n"
  47     L"    /R - Location of user.dat file. Can be used with any other switch.\n"
  48     L"         Ignored. Exists for compatibility with Windows regedit.\n"
  49     L"    /? - Print this help. Any other switches are ignored.\n"
  50     L"    /C - Create registry from. Not implemented.\n"
  51     L"\n"
  52     L"The switches are case-insensitive, can be prefixed either by '-' or '/'.\n"
  53     L"This program is command-line compatible with Microsoft Windows\n"
  54     L"regedit.\n";
  55
  56 typedef enum
  57 {
  58     ACTION_UNDEF, ACTION_ADD, ACTION_EXPORT, ACTION_DELETE
  59 } REGEDIT_ACTION;
  60
  61
  62 LPCWSTR getAppName(void)
  63 {
  64     return L"regedit";
  65 }
  66
  67 /******************************************************************************
  68  * Copies file name from command line string to the buffer.
  69  * Rewinds the command line string pointer to the next non-space character
  70  * after the file name.
  71  * Buffer contains an empty string if no filename was found;
  72  *
  73  * params:
  74  * command_line - command line current position pointer
  75  *      where *s[0] is the first symbol of the file name.
  76  * file_name - buffer to write the file name to.
  77  */
  78 void get_file_name(LPWSTR *command_line, LPWSTR file_name)
  79 {
  80     WCHAR *s = *command_line;
  81     size_t pos = 0; /* position of pointer "s" in *command_line */
  82     file_name[0] = 0;
  83
  84     if (!s[0])
  85     {
  86         return;
  87     }
  88
  89     if (s[0] == L'"')
  90     {
  91         s++;
  92         (*command_line)++;
  93         while(s[0] != L'"')
  94         {
  95             if (!s[0])
  96             {
  97                 fwprintf(stderr, L"%s: Unexpected end of file name!\n", getAppName());
  98                 exit(1);
  99             }
 100             s++;
 101             pos++;
 102         }
 103     }
 104     else
 105     {
 106         while(s[0] && !iswspace(s[0]))
 107         {
 108             s++;
 109             pos++;
 110         }
 111     }
 112     memcpy(file_name, *command_line, pos * sizeof(WCHAR));
 113     /* remove the last backslash */
 114     if (file_name[pos - 1] == L'\\')
 115     {
 116         file_name[pos - 1] = L'\0';
 117     }
 118     else
 119     {
 120         file_name[pos] = L'\0';
 121     }
 122
 123     if (s[0])
 124     {
 125         s++;
 126         pos++;
 127     }
 128     while(s[0] && iswspace(s[0]))
 129     {
 130         s++;
 131         pos++;
 132     }
 133     (*command_line) += pos;
 134 }
 135
 136 BOOL PerformRegAction(REGEDIT_ACTION action, LPWSTR s, BOOL silent)
 137 {
 138     switch (action)
 139     {
 140         case ACTION_ADD:
 141         {
 142             WCHAR szTitle[512], szText[512];
 143             WCHAR filename[MAX_PATH];
 144             FILE *fp;
 145
 146             get_file_name(&s, filename);
 147             if (!filename[0])
 148             {
 149                 InfoMessageBox(NULL, MB_OK | MB_ICONINFORMATION, NULL, L"No file name is specified.");
 150                 InfoMessageBox(NULL, MB_OK | MB_ICONINFORMATION, NULL, usage);
 151                 exit(4);
 152             }
 153
 154             LoadStringW(hInst, IDS_APP_TITLE, szTitle, COUNT_OF(szTitle));
 155
 156             while (filename[0])
 157             {
 158                 /* Request import confirmation */
 159                 if (!silent)
 160                 {
 161                     LoadStringW(hInst, IDS_IMPORT_PROMPT, szText, COUNT_OF(szText));
 162
 163                     if (InfoMessageBox(NULL, MB_YESNO | MB_ICONWARNING, szTitle, szText, filename) != IDYES)
 164                         goto cont;
 165                 }
 166
 167                 /* Open the file */
 168                 fp = _wfopen(filename, L"r");
 169
 170                 /* Import it */
 171                 if (fp == NULL || !import_registry_file(fp))
 172                 {
 173                     /* Error opening the file */
 174                     if (!silent)
 175                     {
 176                         LoadStringW(hInst, IDS_IMPORT_ERROR, szText, COUNT_OF(szText));
 177                         InfoMessageBox(NULL, MB_OK | MB_ICONERROR, szTitle, szText, filename);
 178                     }
 179                 }
 180                 else
 181                 {
 182                     /* Show successful import */
 183                     if (!silent)
 184                     {
 185                         LoadStringW(hInst, IDS_IMPORT_OK, szText, COUNT_OF(szText));
 186                         InfoMessageBox(NULL, MB_OK | MB_ICONINFORMATION, szTitle, szText, filename);
 187                     }
 188                 }
 189
 190                 /* Close the file */
 191                 if (fp) fclose(fp);
 192
 193 cont:
 194                 get_file_name(&s, filename);
 195             }
 196             break;
 197         }
 198
 199         case ACTION_DELETE:
 200         {
 201             WCHAR reg_key_name[KEY_MAX_LEN];
 202             get_file_name(&s, reg_key_name);
 203             if (!reg_key_name[0])
 204             {
 205                 InfoMessageBox(NULL, MB_OK | MB_ICONINFORMATION, NULL, L"No registry key is specified for removal.");
 206                 InfoMessageBox(NULL, MB_OK | MB_ICONINFORMATION, NULL, usage);
 207                 exit(6);
 208             }
 209             delete_registry_key(reg_key_name);
 210             break;
 211         }
 212
 213         case ACTION_EXPORT:
 214         {
 215             WCHAR filename[MAX_PATH];
 216
 217             filename[0] = L'\0';
 218             get_file_name(&s, filename);
 219             if (!filename[0])
 220             {
 221                 InfoMessageBox(NULL, MB_OK | MB_ICONINFORMATION, NULL, L"No file name is specified.");
 222                 InfoMessageBox(NULL, MB_OK | MB_ICONINFORMATION, NULL, usage);
 223                 exit(7);
 224             }
 225
 226             if (s[0])
 227             {
 228                 WCHAR reg_key_name[KEY_MAX_LEN];
 229                 get_file_name(&s, reg_key_name);
 230                 export_registry_key(filename, reg_key_name, REG_FORMAT_4);
 231             }
 232             else
 233             {
 234                 export_registry_key(filename, NULL, REG_FORMAT_4);
 235             }
 236             break;
 237         }
 238
 239         default:
 240             fwprintf(stderr, L"%s: Unhandled action!\n", getAppName());
 241             exit(8);
 242             break;
 243     }
 244
 245     return TRUE;
 246 }
 247
 248 /**
 249  * Process unknown switch.
 250  *
 251  * Params:
 252  *   chu - the switch character in upper-case.
 253  *   s - the command line string where s points to the switch character.
 254  */
 255 static void error_unknown_switch(WCHAR chu, LPWSTR s)
 256 {
 257     if (iswalpha(chu))
 258     {
 259         fwprintf(stderr, L"%s: Undefined switch /%c!\n", getAppName(), chu);
 260     }
 261     else
 262     {
 263         fwprintf(stderr, L"%s: Alphabetic character is expected after '%c' "
 264                           L"in switch specification\n", getAppName(), *(s - 1));
 265     }
 266     exit(1);
 267 }
 268
 269 BOOL ProcessCmdLine(LPWSTR lpCmdLine)
 270 {
 271     BOOL silent = FALSE;
 272     REGEDIT_ACTION action = ACTION_UNDEF;
 273     LPWSTR s = lpCmdLine;       /* command line pointer */
 274     WCHAR ch = *s;              /* current character */
 275
 276     while (ch && ((ch == L'-') || (ch == L'/')))
 277     {
 278         WCHAR chu;
 279         WCHAR ch2;
 280
 281         s++;
 282         ch = *s;
 283         ch2 = *(s + 1);
 284         chu = towupper(ch);
 285         if (!ch2 || iswspace(ch2))
 286         {
 287             if (chu == L'S')
 288             {
 289                 /* Silence dialogs */
 290                 silent = TRUE;
 291             }
 292             else if (chu == L'V')
 293             {
 294                 /* Ignore this switch */
 295             }
 296             else
 297             {
 298                 switch (chu)
 299                 {
 300                     case L'D':
 301                         action = ACTION_DELETE;
 302                         break;
 303                     case L'E':
 304                         action = ACTION_EXPORT;
 305                         break;
 306                     case L'?':
 307                         InfoMessageBox(NULL, MB_OK | MB_ICONINFORMATION, NULL, usage);
 308                         exit(3);
 309                         break;
 310                     default:
 311                         error_unknown_switch(chu, s);
 312                         break;
 313                 }
 314             }
 315             s++;
 316         }
 317         else
 318         {
 319             if (ch2 == L':')
 320             {
 321                 switch (chu)
 322                 {
 323                     case L'L':
 324                         /* fall through */
 325                     case L'R':
 326                         s += 2;
 327                         while (*s && !iswspace(*s))
 328                         {
 329                             s++;
 330                         }
 331                         break;
 332                     default:
 333                         error_unknown_switch(chu, s);
 334                         break;
 335                 }
 336             }
 337             else
 338             {
 339                 /* this is a file name, starting from '/' */
 340                 s--;
 341                 break;
 342             }
 343         }
 344         /* skip spaces to the next parameter */
 345         ch = *s;
 346         while (ch && iswspace(ch))
 347         {
 348             s++;
 349             ch = *s;
 350         }
 351     }
 352
 353     if (*s && action == ACTION_UNDEF)
 354         action = ACTION_ADD;
 355
 356     if (action != ACTION_UNDEF)
 357         return PerformRegAction(action, s, silent);
 358     else
 359         return FALSE;
 360 }