base/applications/regedit/regedit.c

   1 /*
   2  * Windows regedit.exe registry editor implementation.
   3  *
   4  * Copyright 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 char *usage =
  25     "Usage:\n"
  26     "    regedit filename\n"
  27     "    regedit /E filename [regpath]\n"
  28     "    regedit /D regpath\n"
  29     "\n"
  30     "filename - registry file name\n"
  31     "regpath - name of the registry key\n"
  32     "\n"
  33     "When is called without any switches adds contents of the specified\n"
  34     "registry file to the registry\n"
  35     "\n"
  36     "Switches:\n"
  37     "    /E - exports contents of the specified registry key to the specified\n"
  38     "   file. Exports the whole registry if no key is specified.\n"
  39     "    /D - deletes specified registry key\n"
  40     "    /S - silent execution, can be used with any other switch.\n"
  41     "   The only existing mode, exists for compatibility with Windows regedit.\n"
  42     "    /V - advanced mode, can be used with any other switch.\n"
  43     "   Ignored, exists for compatibility with Windows regedit.\n"
  44     "    /L - location of system.dat file. Can be used with any other switch.\n"
  45     "   Ignored. Exists for compatibility with Windows regedit.\n"
  46     "    /R - location of user.dat file. Can be used with any other switch.\n"
  47     "   Ignored. Exists for compatibility with Windows regedit.\n"
  48     "    /? - print this help. Any other switches are ignored.\n"
  49     "    /C - create registry from. Not implemented.\n"
  50     "\n"
  51     "The switches are case-insensitive, can be prefixed either by '-' or '/'.\n"
  52     "This program is command-line compatible with Microsoft Windows\n"
  53     "regedit.\n";
  54
  55 typedef enum
  56 {
  57     ACTION_UNDEF, ACTION_ADD, ACTION_EXPORT, ACTION_DELETE
  58 } REGEDIT_ACTION;
  59
  60
  61 const CHAR *getAppName(void)
  62 {
  63     return "regedit";
  64 }
  65
  66 /******************************************************************************
  67  * Copies file name from command line string to the buffer.
  68  * Rewinds the command line string pointer to the next non-space character
  69  * after the file name.
  70  * Buffer contains an empty string if no filename was found;
  71  *
  72  * params:
  73  * command_line - command line current position pointer
  74  *      where *s[0] is the first symbol of the file name.
  75  * file_name - buffer to write the file name to.
  76  */
  77 void get_file_name(LPWSTR *command_line, LPWSTR file_name)
  78 {
  79     WCHAR *s = *command_line;
  80     int pos = 0;                /* position of pointer "s" in *command_line */
  81     file_name[0] = 0;
  82
  83     if (!s[0])
  84     {
  85         return;
  86     }
  87
  88     if (s[0] == L'"')
  89     {
  90         s++;
  91         (*command_line)++;
  92         while(s[0] != L'"')
  93         {
  94             if (!s[0])
  95             {
  96                 fprintf(stderr, "%s: Unexpected end of file name!\n", getAppName());
  97                 exit(1);
  98             }
  99             s++;
 100             pos++;
 101         }
 102     }
 103     else
 104     {
 105         while(s[0] && !iswspace(s[0]))
 106         {
 107             s++;
 108             pos++;
 109         }
 110     }
 111     memcpy(file_name, *command_line, pos * sizeof((*command_line)[0]));
 112     /* remove the last backslash */
 113     if (file_name[pos - 1] == L'\\')
 114     {
 115         file_name[pos - 1] = L'\0';
 116     }
 117     else
 118     {
 119         file_name[pos] = L'\0';
 120     }
 121
 122     if (s[0])
 123     {
 124         s++;
 125         pos++;
 126     }
 127     while(s[0] && iswspace(s[0]))
 128     {
 129         s++;
 130         pos++;
 131     }
 132     (*command_line) += pos;
 133 }
 134
 135 BOOL PerformRegAction(REGEDIT_ACTION action, LPWSTR s)
 136 {
 137     TCHAR szTitle[256], szText[256];
 138     switch (action)
 139     {
 140     case ACTION_ADD:
 141     {
 142         WCHAR filename[MAX_PATH];
 143         FILE *fp;
 144
 145         get_file_name(&s, filename);
 146         if (!filename[0])
 147         {
 148             fprintf(stderr, "%s: No file name is specified\n", getAppName());
 149             fprintf(stderr, usage);
 150             exit(4);
 151         }
 152
 153         while(filename[0])
 154         {
 155             fp = _wfopen(filename, L"r");
 156             if (fp == NULL)
 157             {
 158                 LPSTR p = GetMultiByteString(filename);
 159                 perror("");
 160                 fprintf(stderr, "%s: Can't open file \"%s\"\n", getAppName(), p);
 161                 HeapFree(GetProcessHeap(), 0, p);
 162                 exit(5);
 163             }
 164             import_registry_file(fp);
 165             get_file_name(&s, filename);
 166             LoadString(hInst, IDS_APP_TITLE, szTitle, sizeof(szTitle));
 167             LoadString(hInst, IDS_IMPORTED_OK, szText, sizeof(szTitle));
 168             /* show successful import */
 169             MessageBox(NULL, szText, szTitle, MB_OK);
 170         }
 171         break;
 172     }
 173     case ACTION_DELETE:
 174     {
 175         WCHAR reg_key_name[KEY_MAX_LEN];
 176         get_file_name(&s, reg_key_name);
 177         if (!reg_key_name[0])
 178         {
 179             fprintf(stderr, "%s: No registry key is specified for removal\n", getAppName());
 180             fprintf(stderr, usage);
 181             exit(6);
 182         }
 183         delete_registry_key(reg_key_name);
 184         break;
 185     }
 186     case ACTION_EXPORT:
 187     {
 188         WCHAR filename[MAX_PATH];
 189
 190         filename[0] = _T('\0');
 191         get_file_name(&s, filename);
 192         if (!filename[0])
 193         {
 194             fprintf(stderr, "%s: No file name is specified\n", getAppName());
 195             fprintf(stderr, usage);
 196             exit(7);
 197         }
 198
 199         if (s[0])
 200         {
 201             WCHAR reg_key_name[KEY_MAX_LEN];
 202             get_file_name(&s, reg_key_name);
 203             export_registry_key(filename, reg_key_name, REG_FORMAT_4);
 204         }
 205         else
 206         {
 207             export_registry_key(filename, NULL, REG_FORMAT_4);
 208         }
 209         break;
 210     }
 211     default:
 212         fprintf(stderr, "%s: Unhandled action!\n", getAppName());
 213         exit(8);
 214         break;
 215     }
 216     return TRUE;
 217 }
 218
 219 /**
 220  * Process unknown switch.
 221  *
 222  * Params:
 223  *   chu - the switch character in upper-case.
 224  *   s - the command line string where s points to the switch character.
 225  */
 226 static void error_unknown_switch(WCHAR chu, LPWSTR s)
 227 {
 228     if (iswalpha(chu))
 229     {
 230         fprintf(stderr, "%s: Undefined switch /%c!\n", getAppName(), chu);
 231     }
 232     else
 233     {
 234         fprintf(stderr, "%s: Alphabetic character is expected after '%c' "
 235                 "in swit ch specification\n", getAppName(), *(s - 1));
 236     }
 237     exit(1);
 238 }
 239
 240 BOOL ProcessCmdLine(LPWSTR lpCmdLine)
 241 {
 242     REGEDIT_ACTION action = ACTION_UNDEF;
 243     LPWSTR s = lpCmdLine;       /* command line pointer */
 244     WCHAR ch = *s;              /* current character */
 245
 246     while (ch && ((ch == L'-') || (ch == L'/')))
 247     {
 248         WCHAR chu;
 249         WCHAR ch2;
 250
 251         s++;
 252         ch = *s;
 253         ch2 = *(s + 1);
 254         chu = (WCHAR)towupper(ch);
 255         if (!ch2 || iswspace(ch2))
 256         {
 257             if (chu == L'S' || chu == L'V')
 258             {
 259                 /* ignore these switches */
 260             }
 261             else
 262             {
 263                 switch (chu)
 264                 {
 265                 case L'D':
 266                     action = ACTION_DELETE;
 267                     break;
 268                 case L'E':
 269                     action = ACTION_EXPORT;
 270                     break;
 271                 case L'?':
 272                     fprintf(stderr, usage);
 273                     exit(3);
 274                     break;
 275                 default:
 276                     error_unknown_switch(chu, s);
 277                     break;
 278                 }
 279             }
 280             s++;
 281         }
 282         else
 283         {
 284             if (ch2 == L':')
 285             {
 286                 switch (chu)
 287                 {
 288                 case L'L':
 289                     /* fall through */
 290                 case L'R':
 291                     s += 2;
 292                     while (*s && !iswspace(*s))
 293                     {
 294                         s++;
 295                     }
 296                     break;
 297                 default:
 298                     error_unknown_switch(chu, s);
 299                     break;
 300                 }
 301             }
 302             else
 303             {
 304                 /* this is a file name, starting from '/' */
 305                 s--;
 306                 break;
 307             }
 308         }
 309         /* skip spaces to the next parameter */
 310         ch = *s;
 311         while (ch && iswspace(ch))
 312         {
 313             s++;
 314             ch = *s;
 315         }
 316     }
 317
 318     if (*s && action == ACTION_UNDEF)
 319             {
 320          TCHAR szTitle[256], szText[256];
 321          LoadString(hInst, IDS_APP_TITLE, szTitle, sizeof(szTitle));
 322          LoadString(hInst, IDS_IMPORT_PROMPT, szText, sizeof(szTitle));
 323          /* request import confirmation */
 324              if (MessageBox(NULL, szText, szTitle, MB_YESNO) == IDYES)
 325              {
 326           action = ACTION_ADD;
 327          }
 328                  else return TRUE;
 329         }
 330         if (action == ACTION_UNDEF)
 331         return FALSE;
 332
 333     return PerformRegAction(action, s);
 334 }