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     switch (action)
 138     {
 139     case ACTION_ADD:
 140     {
 141         WCHAR filename[MAX_PATH];
 142         FILE *fp;
 143
 144         get_file_name(&s, filename);
 145         if (!filename[0])
 146         {
 147             fprintf(stderr, "%s: No file name is specified\n", getAppName());
 148             fprintf(stderr, usage);
 149             exit(4);
 150         }
 151
 152         while(filename[0])
 153         {
 154             fp = _wfopen(filename, L"r");
 155             if (fp == NULL)
 156             {
 157                 LPSTR p = GetMultiByteString(filename);
 158                 perror("");
 159                 fprintf(stderr, "%s: Can't open file \"%s\"\n", getAppName(), p);
 160                 HeapFree(GetProcessHeap(), 0, p);
 161                 exit(5);
 162             }
 163             import_registry_file(fp);
 164             get_file_name(&s, filename);
 165         }
 166         break;
 167     }
 168     case ACTION_DELETE:
 169     {
 170         WCHAR reg_key_name[KEY_MAX_LEN];
 171         get_file_name(&s, reg_key_name);
 172         if (!reg_key_name[0])
 173         {
 174             fprintf(stderr, "%s: No registry key is specified for removal\n", getAppName());
 175             fprintf(stderr, usage);
 176             exit(6);
 177         }
 178         delete_registry_key(reg_key_name);
 179         break;
 180     }
 181     case ACTION_EXPORT:
 182     {
 183         WCHAR filename[MAX_PATH];
 184
 185         filename[0] = _T('\0');
 186         get_file_name(&s, filename);
 187         if (!filename[0])
 188         {
 189             fprintf(stderr, "%s: No file name is specified\n", getAppName());
 190             fprintf(stderr, usage);
 191             exit(7);
 192         }
 193
 194         if (s[0])
 195         {
 196             WCHAR reg_key_name[KEY_MAX_LEN];
 197             get_file_name(&s, reg_key_name);
 198             export_registry_key(filename, reg_key_name, REG_FORMAT_4);
 199         }
 200         else
 201         {
 202             export_registry_key(filename, NULL, REG_FORMAT_4);
 203         }
 204         break;
 205     }
 206     default:
 207         fprintf(stderr, "%s: Unhandled action!\n", getAppName());
 208         exit(8);
 209         break;
 210     }
 211     return TRUE;
 212 }
 213
 214 /**
 215  * Process unknown switch.
 216  *
 217  * Params:
 218  *   chu - the switch character in upper-case.
 219  *   s - the command line string where s points to the switch character.
 220  */
 221 static void error_unknown_switch(WCHAR chu, LPWSTR s)
 222 {
 223     if (iswalpha(chu))
 224     {
 225         fprintf(stderr, "%s: Undefined switch /%c!\n", getAppName(), chu);
 226     }
 227     else
 228     {
 229         fprintf(stderr, "%s: Alphabetic character is expected after '%c' "
 230                 "in swit ch specification\n", getAppName(), *(s - 1));
 231     }
 232     exit(1);
 233 }
 234
 235 BOOL ProcessCmdLine(LPWSTR lpCmdLine)
 236 {
 237     REGEDIT_ACTION action = ACTION_UNDEF;
 238     LPWSTR s = lpCmdLine;       /* command line pointer */
 239     WCHAR ch = *s;              /* current character */
 240
 241     while (ch && ((ch == L'-') || (ch == L'/')))
 242     {
 243         WCHAR chu;
 244         WCHAR ch2;
 245
 246         s++;
 247         ch = *s;
 248         ch2 = *(s + 1);
 249         chu = (WCHAR)towupper(ch);
 250         if (!ch2 || iswspace(ch2))
 251         {
 252             if (chu == L'S' || chu == L'V')
 253             {
 254                 /* ignore these switches */
 255             }
 256             else
 257             {
 258                 switch (chu)
 259                 {
 260                 case L'D':
 261                     action = ACTION_DELETE;
 262                     break;
 263                 case L'E':
 264                     action = ACTION_EXPORT;
 265                     break;
 266                 case L'?':
 267                     fprintf(stderr, usage);
 268                     exit(3);
 269                     break;
 270                 default:
 271                     error_unknown_switch(chu, s);
 272                     break;
 273                 }
 274             }
 275             s++;
 276         }
 277         else
 278         {
 279             if (ch2 == L':')
 280             {
 281                 switch (chu)
 282                 {
 283                 case L'L':
 284                     /* fall through */
 285                 case L'R':
 286                     s += 2;
 287                     while (*s && !iswspace(*s))
 288                     {
 289                         s++;
 290                     }
 291                     break;
 292                 default:
 293                     error_unknown_switch(chu, s);
 294                     break;
 295                 }
 296             }
 297             else
 298             {
 299                 /* this is a file name, starting from '/' */
 300                 s--;
 301                 break;
 302             }
 303         }
 304         /* skip spaces to the next parameter */
 305         ch = *s;
 306         while (ch && iswspace(ch))
 307         {
 308             s++;
 309             ch = *s;
 310         }
 311     }
 312
 313     if (*s && action == ACTION_UNDEF)
 314         action = ACTION_ADD;
 315
 316     if (action == ACTION_UNDEF)
 317         return FALSE;
 318
 319     return PerformRegAction(action, s);
 320 }