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
   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 2 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 UTF-16 */
  24
  25 #include "includes.h"
  26 #include "lib/registry/patchfile.h"
  27 #include "lib/registry/registry.h"
  28 #include "system/filesys.h"
  29
  30 /**
  31  * @file
  32  * @brief Registry patch files
  33  */
  34
  35 #define HEADER_STRING "REGEDIT4"
  36
  37 struct dotreg_data {
  38         int fd;
  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
  65         fdprintf(data->fd, "\"%s\"=%s:%s\n",
  66                         value_name, str_regtype(value_type),
  67                         reg_val_data_string(NULL, value_type, value));
  68
  69         return WERR_OK;
  70 }
  71
  72 static WERROR reg_dotreg_diff_del_value(void *_data, const char *path,
  73                                         const char *value_name)
  74 {
  75         struct dotreg_data *data = (struct dotreg_data *)_data;
  76
  77         fdprintf(data->fd, "\"%s\"=-\n", value_name);
  78
  79         return WERR_OK;
  80 }
  81
  82 static WERROR reg_dotreg_diff_done(void *_data)
  83 {
  84         struct dotreg_data *data = (struct dotreg_data *)_data;
  85
  86         close(data->fd);
  87         talloc_free(data);
  88
  89         return WERR_OK;
  90 }
  91
  92 static WERROR reg_dotreg_diff_del_all_values(void *callback_data,
  93                                              const char *key_name)
  94 {
  95         return WERR_NOT_SUPPORTED;
  96 }
  97
  98 /**
  99  * Save registry diff
 100  */
 101 _PUBLIC_ WERROR reg_dotreg_diff_save(TALLOC_CTX *ctx, const char *filename,
 102                                      struct reg_diff_callbacks **callbacks,
 103                                      void **callback_data)
 104 {
 105         struct dotreg_data *data;
 106
 107         data = talloc_zero(ctx, struct dotreg_data);
 108         *callback_data = data;
 109
 110         if (filename) {
 111                 data->fd = open(filename, O_CREAT, 0755);
 112                 if (data->fd == -1) {
 113                         DEBUG(0, ("Unable to open %s\n", filename));
 114                         return WERR_BADFILE;
 115                 }
 116         } else {
 117                 data->fd = STDOUT_FILENO;
 118         }
 119
 120         fdprintf(data->fd, "%s\n", HEADER_STRING);
 121
 122         *callbacks = talloc(ctx, struct reg_diff_callbacks);
 123
 124         (*callbacks)->add_key = reg_dotreg_diff_add_key;
 125         (*callbacks)->del_key = reg_dotreg_diff_del_key;
 126         (*callbacks)->set_value = reg_dotreg_diff_set_value;
 127         (*callbacks)->del_value = reg_dotreg_diff_del_value;
 128         (*callbacks)->del_all_values = reg_dotreg_diff_del_all_values;
 129         (*callbacks)->done = reg_dotreg_diff_done;
 130
 131         return WERR_OK;
 132 }
 133
 134 /**
 135  * Load diff file
 136  */
 137 _PUBLIC_ WERROR reg_dotreg_diff_load(int fd,
 138                                      const struct reg_diff_callbacks *callbacks,
 139                                      void *callback_data)
 140 {
 141         char *line, *p, *q;
 142         char *curkey = NULL;
 143         TALLOC_CTX *mem_ctx = talloc_init("reg_dotreg_diff_load");
 144         WERROR error;
 145         uint32_t value_type;
 146         DATA_BLOB value;
 147
 148         line = afdgets(fd, mem_ctx, 0);
 149         if (!line) {
 150                 DEBUG(0, ("Can't read from file.\n"));
 151                 talloc_free(mem_ctx);
 152                 close(fd);
 153                 return WERR_GENERAL_FAILURE;
 154         }
 155
 156         while ((line = afdgets(fd, mem_ctx, 0))) {
 157                 /* Ignore comments and empty lines */
 158                 if (strlen(line) == 0 || line[0] == ';') {
 159                         talloc_free(line);
 160
 161                         if (curkey) {
 162                                 talloc_free(curkey);
 163                         }
 164                         curkey = NULL;
 165                         continue;
 166                 }
 167
 168                 /* Start of key */
 169                 if (line[0] == '[') {
 170                         p = strchr_m(line, ']');
 171                         if (p[strlen(p)-1] != ']') {
 172                                 DEBUG(0, ("Missing ']'\n"));
 173                                 return WERR_GENERAL_FAILURE;
 174                         }
 175                         /* Deleting key */
 176                         if (line[1] == '-') {
 177                                 curkey = talloc_strndup(line, line+2, strlen(line)-3);
 178
 179                                 error = callbacks->del_key(callback_data,
 180                                                            curkey);
 181                                 if (!W_ERROR_IS_OK(error)) {
 182                                         DEBUG(0,("Error deleting key %s\n",
 183                                                 curkey));
 184                                         talloc_free(mem_ctx);
 185                                         return error;
 186                                 }
 187
 188                                 talloc_free(line);
 189                                 curkey = NULL;
 190                                 continue;
 191                         }
 192                         curkey = talloc_strndup(mem_ctx, line+1, strlen(line)-2);
 193
 194                         error = callbacks->add_key(callback_data, curkey);
 195                         if (!W_ERROR_IS_OK(error)) {
 196                                 DEBUG(0,("Error adding key %s\n", curkey));
 197                                 talloc_free(mem_ctx);
 198                                 return error;
 199                         }
 200
 201                         talloc_free(line);
 202                         continue;
 203                 }
 204
 205                 /* Deleting/Changing value */
 206                 p = strchr_m(line, '=');
 207                 if (p == NULL) {
 208                         DEBUG(0, ("Malformed line\n"));
 209                         talloc_free(line);
 210                         continue;
 211                 }
 212
 213                 *p = '\0'; p++;
 214
 215                 if (curkey == NULL) {
 216                         DEBUG(0, ("Value change without key\n"));
 217                         talloc_free(line);
 218                         continue;
 219                 }
 220
 221                 /* Delete value */
 222                 if (strcmp(p, "-") == 0) {
 223                         error = callbacks->del_value(callback_data,
 224                                                      curkey, line);
 225                         if (!W_ERROR_IS_OK(error)) {
 226                                 DEBUG(0, ("Error deleting value %s in key %s\n",
 227                                         line, curkey));
 228                                 talloc_free(mem_ctx);
 229                                 return error;
 230                         }
 231
 232                         talloc_free(line);
 233                         continue;
 234                 }
 235
 236                 q = strchr_m(p, ':');
 237                 if (q) {
 238                         *q = '\0';
 239                         q++;
 240                 }
 241
 242                 reg_string_to_val(line, q?p:"REG_SZ", q?q:p,
 243                                   &value_type, &value);
 244
 245                 error = callbacks->set_value(callback_data, curkey, line,
 246                                              value_type, value);
 247                 if (!W_ERROR_IS_OK(error)) {
 248                         DEBUG(0, ("Error setting value for %s in %s\n",
 249                                 line, curkey));
 250                         talloc_free(mem_ctx);
 251                         return error;
 252                 }
 253
 254                 talloc_free(line);
 255         }
 256
 257         close(fd);
 258
 259         return WERR_OK;
 260 }