source4/lib/registry/patchfile_dotreg.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Reading .REG files
   4
   5    Copyright (C) Jelmer Vernooij 2004-2007
   6    Copyright (C) Wilco Baan Hofman 2006-2008
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 /* FIXME Newer .REG files, created by Windows XP and above use unicode UCS-2 */
  24
  25 #include "includes.h"
  26 #include "lib/registry/registry.h"
  27 #include "system/filesys.h"
  28
  29 /**
  30  * @file
  31  * @brief Registry patch files
  32  */
  33
  34 #define HEADER_STRING "REGEDIT4"
  35
  36 struct dotreg_data {
  37         int fd;
  38         struct smb_iconv_convenience *iconv_convenience;
  39 };
  40
  41 static WERROR reg_dotreg_diff_add_key(void *_data, const char *key_name)
  42 {
  43         struct dotreg_data *data = (struct dotreg_data *)_data;
  44
  45         fdprintf(data->fd, "\n[%s]\n", key_name);
  46
  47         return WERR_OK;
  48 }
  49
  50 static WERROR reg_dotreg_diff_del_key(void *_data, const char *key_name)
  51 {
  52         struct dotreg_data *data = (struct dotreg_data *)_data;
  53
  54         fdprintf(data->fd, "\n[-%s]\n", key_name);
  55
  56         return WERR_OK;
  57 }
  58
  59 static WERROR reg_dotreg_diff_set_value(void *_data, const char *path,
  60                                         const char *value_name,
  61                                         uint32_t value_type, DATA_BLOB value)
  62 {
  63         struct dotreg_data *data = (struct dotreg_data *)_data;
  64         char *data_string = reg_val_data_string(NULL, data->iconv_convenience,
  65                                                 value_type, value);
  66         W_ERROR_HAVE_NO_MEMORY(data_string);
  67         fdprintf(data->fd, "\"%s\"=%s:%s\n",
  68                  value_name, str_regtype(value_type), data_string);
  69         talloc_free(data_string);
  70
  71         return WERR_OK;
  72 }
  73
  74 static WERROR reg_dotreg_diff_del_value(void *_data, const char *path,
  75                                         const char *value_name)
  76 {
  77         struct dotreg_data *data = (struct dotreg_data *)_data;
  78
  79         fdprintf(data->fd, "\"%s\"=-\n", value_name);
  80
  81         return WERR_OK;
  82 }
  83
  84 static WERROR reg_dotreg_diff_done(void *_data)
  85 {
  86         struct dotreg_data *data = (struct dotreg_data *)_data;
  87
  88         close(data->fd);
  89         talloc_free(data);
  90
  91         return WERR_OK;
  92 }
  93
  94 static WERROR reg_dotreg_diff_del_all_values(void *callback_data,
  95                                              const char *key_name)
  96 {
  97         return WERR_NOT_SUPPORTED;
  98 }
  99
 100 /**
 101  * Save registry diff
 102  */
 103 _PUBLIC_ WERROR reg_dotreg_diff_save(TALLOC_CTX *ctx, const char *filename,
 104                                      struct smb_iconv_convenience *iconv_convenience,
 105                                      struct reg_diff_callbacks **callbacks,
 106                                      void **callback_data)
 107 {
 108         struct dotreg_data *data;
 109
 110         data = talloc_zero(ctx, struct dotreg_data);
 111         *callback_data = data;
 112
 113         data->iconv_convenience = iconv_convenience;
 114
 115         if (filename) {
 116                 data->fd = open(filename, O_CREAT|O_WRONLY, 0755);
 117                 if (data->fd < 0) {
 118                         DEBUG(0, ("Unable to open %s\n", filename));
 119                         return WERR_BADFILE;
 120                 }
 121         } else {
 122                 data->fd = STDOUT_FILENO;
 123         }
 124
 125         fdprintf(data->fd, "%s\n\n", HEADER_STRING);
 126
 127         *callbacks = talloc(ctx, struct reg_diff_callbacks);
 128
 129         (*callbacks)->add_key = reg_dotreg_diff_add_key;
 130         (*callbacks)->del_key = reg_dotreg_diff_del_key;
 131         (*callbacks)->set_value = reg_dotreg_diff_set_value;
 132         (*callbacks)->del_value = reg_dotreg_diff_del_value;
 133         (*callbacks)->del_all_values = reg_dotreg_diff_del_all_values;
 134         (*callbacks)->done = reg_dotreg_diff_done;
 135
 136         return WERR_OK;
 137 }
 138
 139 /**
 140  * Load diff file
 141  */
 142 _PUBLIC_ WERROR reg_dotreg_diff_load(int fd,
 143                                      struct smb_iconv_convenience *iconv_convenience,
 144                                      const struct reg_diff_callbacks *callbacks,
 145                                      void *callback_data)
 146 {
 147         char *line, *p, *q;
 148         char *curkey = NULL;
 149         TALLOC_CTX *mem_ctx = talloc_init("reg_dotreg_diff_load");
 150         WERROR error;
 151         uint32_t value_type;
 152         DATA_BLOB value;
 153
 154         line = afdgets(fd, mem_ctx, 0);
 155         if (!line) {
 156                 DEBUG(0, ("Can't read from file.\n"));
 157                 talloc_free(mem_ctx);
 158                 close(fd);
 159                 return WERR_GENERAL_FAILURE;
 160         }
 161
 162         while ((line = afdgets(fd, mem_ctx, 0))) {
 163                 /* Ignore comments and empty lines */
 164                 if (strlen(line) == 0 || line[0] == ';') {
 165                         talloc_free(line);
 166
 167                         if (curkey) {
 168                                 talloc_free(curkey);
 169                         }
 170                         curkey = NULL;
 171                         continue;
 172                 }
 173
 174                 /* Start of key */
 175                 if (line[0] == '[') {
 176                         p = strchr_m(line, ']');
 177                         if (p[strlen(p)-1] != ']') {
 178                                 DEBUG(0, ("Missing ']'\n"));
 179                                 return WERR_GENERAL_FAILURE;
 180                         }
 181                         /* Deleting key */
 182                         if (line[1] == '-') {
 183                                 curkey = talloc_strndup(line, line+2, strlen(line)-3);
 184                                 W_ERROR_HAVE_NO_MEMORY(curkey);
 185
 186                                 error = callbacks->del_key(callback_data,
 187                                                            curkey);
 188
 189                                 if (!W_ERROR_IS_OK(error)) {
 190                                         DEBUG(0,("Error deleting key %s\n",
 191                                                 curkey));
 192                                         talloc_free(mem_ctx);
 193                                         return error;
 194                                 }
 195
 196                                 talloc_free(line);
 197                                 curkey = NULL;
 198                                 continue;
 199                         }
 200                         curkey = talloc_strndup(mem_ctx, line+1, strlen(line)-2);
 201                         W_ERROR_HAVE_NO_MEMORY(curkey);
 202
 203                         error = callbacks->add_key(callback_data, curkey);
 204                         if (!W_ERROR_IS_OK(error)) {
 205                                 DEBUG(0,("Error adding key %s\n", curkey));
 206                                 talloc_free(mem_ctx);
 207                                 return error;
 208                         }
 209
 210                         talloc_free(line);
 211                         continue;
 212                 }
 213
 214                 /* Deleting/Changing value */
 215                 p = strchr_m(line, '=');
 216                 if (p == NULL) {
 217                         DEBUG(0, ("Malformed line\n"));
 218                         talloc_free(line);
 219                         continue;
 220                 }
 221
 222                 *p = '\0'; p++;
 223
 224                 if (curkey == NULL) {
 225                         DEBUG(0, ("Value change without key\n"));
 226                         talloc_free(line);
 227                         continue;
 228                 }
 229
 230                 /* Delete value */
 231                 if (strcmp(p, "-") == 0) {
 232                         error = callbacks->del_value(callback_data,
 233                                                      curkey, line);
 234                         if (!W_ERROR_IS_OK(error)) {
 235                                 DEBUG(0, ("Error deleting value %s in key %s\n",
 236                                         line, curkey));
 237                                 talloc_free(mem_ctx);
 238                                 return error;
 239                         }
 240
 241                         talloc_free(line);
 242                         continue;
 243                 }
 244
 245                 q = strchr_m(p, ':');
 246                 if (q) {
 247                         *q = '\0';
 248                         q++;
 249                 }
 250
 251                 reg_string_to_val(line, iconv_convenience,
 252                                   q?p:"REG_SZ", q?q:p,
 253                                   &value_type, &value);
 254
 255                 error = callbacks->set_value(callback_data, curkey, line,
 256                                              value_type, value);
 257                 if (!W_ERROR_IS_OK(error)) {
 258                         DEBUG(0, ("Error setting value for %s in %s\n",
 259                                 line, curkey));
 260                         talloc_free(mem_ctx);
 261                         return error;
 262                 }
 263
 264                 talloc_free(line);
 265         }
 266
 267         close(fd);
 268
 269         return WERR_OK;
 270 }