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544 lines
14 KiB
C
544 lines
14 KiB
C
/*
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Unix SMB/CIFS implementation.
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Reading registry patch files
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Copyright (C) Jelmer Vernooij 2004-2007
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Copyright (C) Wilco Baan Hofman 2006
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Copyright (C) Matthias Dieter Wallnöfer 2008-2010
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "lib/registry/registry.h"
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#include "system/filesys.h"
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_PUBLIC_ WERROR reg_preg_diff_load(int fd,
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const struct reg_diff_callbacks *callbacks,
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void *callback_data);
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_PUBLIC_ WERROR reg_dotreg_diff_load(int fd,
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const struct reg_diff_callbacks *callbacks,
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void *callback_data);
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/*
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* Generate difference between two keys
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*/
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WERROR reg_generate_diff_key(struct registry_key *oldkey,
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struct registry_key *newkey,
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const char *path,
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const struct reg_diff_callbacks *callbacks,
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void *callback_data)
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{
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unsigned int i;
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struct registry_key *t1 = NULL, *t2 = NULL;
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char *tmppath;
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const char *keyname1;
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WERROR error, error1, error2;
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TALLOC_CTX *mem_ctx = talloc_init("writediff");
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uint32_t old_num_subkeys, old_num_values,
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new_num_subkeys, new_num_values;
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if (oldkey != NULL) {
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error = reg_key_get_info(mem_ctx, oldkey, NULL,
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&old_num_subkeys, &old_num_values,
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NULL, NULL, NULL, NULL);
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if (!W_ERROR_IS_OK(error)) {
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DEBUG(0, ("Error occurred while getting key info: %s\n",
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win_errstr(error)));
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talloc_free(mem_ctx);
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return error;
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}
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} else {
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old_num_subkeys = 0;
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old_num_values = 0;
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}
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/* Subkeys that were changed or deleted */
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for (i = 0; i < old_num_subkeys; i++) {
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error1 = reg_key_get_subkey_by_index(mem_ctx, oldkey, i,
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&keyname1, NULL, NULL);
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if (!W_ERROR_IS_OK(error1)) {
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DEBUG(0, ("Error occurred while getting subkey by index: %s\n",
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win_errstr(error1)));
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continue;
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}
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if (newkey != NULL) {
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error2 = reg_open_key(mem_ctx, newkey, keyname1, &t2);
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} else {
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error2 = WERR_BADFILE;
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t2 = NULL;
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}
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if (!W_ERROR_IS_OK(error2) && !W_ERROR_EQUAL(error2, WERR_BADFILE)) {
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DEBUG(0, ("Error occurred while getting subkey by name: %s\n",
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win_errstr(error2)));
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talloc_free(mem_ctx);
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return error2;
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}
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/* if "error2" is going to be "WERR_BADFILE", then newkey */
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/* didn't have such a subkey and therefore add a del diff */
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tmppath = talloc_asprintf(mem_ctx, "%s\\%s", path, keyname1);
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if (tmppath == NULL) {
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DEBUG(0, ("Out of memory\n"));
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talloc_free(mem_ctx);
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return WERR_NOMEM;
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}
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if (!W_ERROR_IS_OK(error2))
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callbacks->del_key(callback_data, tmppath);
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/* perform here also the recursive invocation */
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error1 = reg_open_key(mem_ctx, oldkey, keyname1, &t1);
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if (!W_ERROR_IS_OK(error1)) {
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DEBUG(0, ("Error occurred while getting subkey by name: %s\n",
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win_errstr(error1)));
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talloc_free(mem_ctx);
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return error1;
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}
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reg_generate_diff_key(t1, t2, tmppath, callbacks, callback_data);
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talloc_free(tmppath);
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}
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if (newkey != NULL) {
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error = reg_key_get_info(mem_ctx, newkey, NULL,
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&new_num_subkeys, &new_num_values,
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NULL, NULL, NULL, NULL);
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if (!W_ERROR_IS_OK(error)) {
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DEBUG(0, ("Error occurred while getting key info: %s\n",
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win_errstr(error)));
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talloc_free(mem_ctx);
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return error;
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}
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} else {
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new_num_subkeys = 0;
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new_num_values = 0;
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}
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/* Subkeys that were added */
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for(i = 0; i < new_num_subkeys; i++) {
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error1 = reg_key_get_subkey_by_index(mem_ctx, newkey, i,
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&keyname1, NULL, NULL);
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if (!W_ERROR_IS_OK(error1)) {
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DEBUG(0, ("Error occurred while getting subkey by index: %s\n",
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win_errstr(error1)));
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talloc_free(mem_ctx);
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return error1;
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}
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if (oldkey != NULL) {
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error2 = reg_open_key(mem_ctx, oldkey, keyname1, &t1);
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if (W_ERROR_IS_OK(error2))
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continue;
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} else {
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error2 = WERR_BADFILE;
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t1 = NULL;
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}
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if (!W_ERROR_EQUAL(error2, WERR_BADFILE)) {
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DEBUG(0, ("Error occurred while getting subkey by name: %s\n",
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win_errstr(error2)));
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talloc_free(mem_ctx);
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return error2;
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}
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/* oldkey didn't have such a subkey, add a add diff */
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tmppath = talloc_asprintf(mem_ctx, "%s\\%s", path, keyname1);
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if (tmppath == NULL) {
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DEBUG(0, ("Out of memory\n"));
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talloc_free(mem_ctx);
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return WERR_NOMEM;
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}
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callbacks->add_key(callback_data, tmppath);
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/* perform here also the recursive invocation */
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error1 = reg_open_key(mem_ctx, newkey, keyname1, &t2);
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if (!W_ERROR_IS_OK(error1)) {
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DEBUG(0, ("Error occurred while getting subkey by name: %s\n",
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win_errstr(error1)));
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talloc_free(mem_ctx);
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return error1;
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}
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reg_generate_diff_key(t1, t2, tmppath, callbacks, callback_data);
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talloc_free(tmppath);
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}
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/* Values that were added or changed */
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for(i = 0; i < new_num_values; i++) {
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const char *name;
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uint32_t type1, type2;
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DATA_BLOB contents1 = { NULL, 0 }, contents2 = { NULL, 0 };
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error1 = reg_key_get_value_by_index(mem_ctx, newkey, i,
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&name, &type1, &contents1);
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if (!W_ERROR_IS_OK(error1)) {
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DEBUG(0, ("Unable to get value by index: %s\n",
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win_errstr(error1)));
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talloc_free(mem_ctx);
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return error1;
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}
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if (oldkey != NULL) {
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error2 = reg_key_get_value_by_name(mem_ctx, oldkey,
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name, &type2,
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&contents2);
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} else
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error2 = WERR_BADFILE;
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if (!W_ERROR_IS_OK(error2)
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&& !W_ERROR_EQUAL(error2, WERR_BADFILE)) {
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DEBUG(0, ("Error occurred while getting value by name: %s\n",
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win_errstr(error2)));
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talloc_free(mem_ctx);
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return error2;
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}
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if (W_ERROR_IS_OK(error2)
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&& (data_blob_cmp(&contents1, &contents2) == 0)
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&& (type1 == type2)) {
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talloc_free(discard_const_p(char, name));
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talloc_free(contents1.data);
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talloc_free(contents2.data);
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continue;
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}
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callbacks->set_value(callback_data, path, name,
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type1, contents1);
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talloc_free(discard_const_p(char, name));
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talloc_free(contents1.data);
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talloc_free(contents2.data);
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}
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/* Values that were deleted */
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for (i = 0; i < old_num_values; i++) {
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const char *name;
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uint32_t type;
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DATA_BLOB contents = { NULL, 0 };
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error1 = reg_key_get_value_by_index(mem_ctx, oldkey, i, &name,
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&type, &contents);
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if (!W_ERROR_IS_OK(error1)) {
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DEBUG(0, ("Unable to get value by index: %s\n",
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win_errstr(error1)));
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talloc_free(mem_ctx);
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return error1;
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}
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if (newkey != NULL)
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error2 = reg_key_get_value_by_name(mem_ctx, newkey,
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name, &type, &contents);
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else
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error2 = WERR_BADFILE;
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if (W_ERROR_IS_OK(error2)) {
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talloc_free(discard_const_p(char, name));
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talloc_free(contents.data);
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continue;
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}
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if (!W_ERROR_EQUAL(error2, WERR_BADFILE)) {
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DEBUG(0, ("Error occurred while getting value by name: %s\n",
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win_errstr(error2)));
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talloc_free(mem_ctx);
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return error2;
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}
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callbacks->del_value(callback_data, path, name);
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talloc_free(discard_const_p(char, name));
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talloc_free(contents.data);
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}
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talloc_free(mem_ctx);
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return WERR_OK;
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}
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/**
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* Generate diff between two registry contexts
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*/
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_PUBLIC_ WERROR reg_generate_diff(struct registry_context *ctx1,
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struct registry_context *ctx2,
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const struct reg_diff_callbacks *callbacks,
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void *callback_data)
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{
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unsigned int i;
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WERROR error;
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for (i = 0; reg_predefined_keys[i].name; i++) {
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struct registry_key *r1 = NULL, *r2 = NULL;
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error = reg_get_predefined_key(ctx1,
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reg_predefined_keys[i].handle, &r1);
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if (!W_ERROR_IS_OK(error) &&
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!W_ERROR_EQUAL(error, WERR_BADFILE)) {
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DEBUG(0, ("Unable to open hive %s for backend 1\n",
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reg_predefined_keys[i].name));
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continue;
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}
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error = reg_get_predefined_key(ctx2,
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reg_predefined_keys[i].handle, &r2);
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if (!W_ERROR_IS_OK(error) &&
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!W_ERROR_EQUAL(error, WERR_BADFILE)) {
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DEBUG(0, ("Unable to open hive %s for backend 2\n",
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reg_predefined_keys[i].name));
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continue;
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}
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/* if "r1" is NULL (old hive) and "r2" isn't (new hive) then
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* the hive doesn't exist yet and we have to generate an add
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* diff */
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if ((r1 == NULL) && (r2 != NULL)) {
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callbacks->add_key(callback_data,
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reg_predefined_keys[i].name);
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}
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/* if "r1" isn't NULL (old hive) and "r2" is (new hive) then
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* the hive shouldn't exist anymore and we have to generate a
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* del diff */
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if ((r1 != NULL) && (r2 == NULL)) {
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callbacks->del_key(callback_data,
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reg_predefined_keys[i].name);
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}
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error = reg_generate_diff_key(r1, r2,
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reg_predefined_keys[i].name, callbacks,
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callback_data);
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if (!W_ERROR_IS_OK(error)) {
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DEBUG(0, ("Unable to determine diff: %s\n",
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win_errstr(error)));
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return error;
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}
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}
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if (callbacks->done != NULL) {
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callbacks->done(callback_data);
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}
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return WERR_OK;
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}
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/**
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* Load diff file
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*/
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_PUBLIC_ WERROR reg_diff_load(const char *filename,
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const struct reg_diff_callbacks *callbacks,
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void *callback_data)
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{
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int fd;
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char hdr[4];
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fd = open(filename, O_RDONLY, 0);
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if (fd == -1) {
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DEBUG(0, ("Error opening registry patch file `%s'\n",
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filename));
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return WERR_GENERAL_FAILURE;
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}
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if (read(fd, &hdr, 4) != 4) {
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DEBUG(0, ("Error reading registry patch file `%s'\n",
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filename));
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close(fd);
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return WERR_GENERAL_FAILURE;
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}
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/* Reset position in file */
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lseek(fd, 0, SEEK_SET);
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#if 0 /* These backends are not supported yet. */
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if (strncmp(hdr, "CREG", 4) == 0) {
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/* Must be a W9x CREG Config.pol file */
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return reg_creg_diff_load(diff, fd);
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} else if (strncmp(hdr, "regf", 4) == 0) {
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/* Must be a REGF NTConfig.pol file */
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return reg_regf_diff_load(diff, fd);
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} else
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#endif
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if (strncmp(hdr, "PReg", 4) == 0) {
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/* Must be a GPO Registry.pol file */
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return reg_preg_diff_load(fd, callbacks, callback_data);
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} else {
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/* Must be a normal .REG file */
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return reg_dotreg_diff_load(fd, callbacks, callback_data);
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}
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}
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/**
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* The reg_diff_apply functions
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*/
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static WERROR reg_diff_apply_add_key(void *_ctx, const char *key_name)
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{
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struct registry_context *ctx = (struct registry_context *)_ctx;
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struct registry_key *tmp;
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char *buf, *buf_ptr;
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WERROR error;
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/* Recursively create the path */
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buf = talloc_strdup(ctx, key_name);
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W_ERROR_HAVE_NO_MEMORY(buf);
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buf_ptr = buf;
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while (*buf_ptr++ != '\0' ) {
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if (*buf_ptr == '\\') {
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*buf_ptr = '\0';
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error = reg_key_add_abs(ctx, ctx, buf, 0, NULL, &tmp);
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if (!W_ERROR_EQUAL(error, WERR_ALREADY_EXISTS) &&
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!W_ERROR_IS_OK(error)) {
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DEBUG(0, ("Error adding new key '%s': %s\n",
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key_name, win_errstr(error)));
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return error;
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}
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*buf_ptr++ = '\\';
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talloc_free(tmp);
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}
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}
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talloc_free(buf);
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/* Add the key */
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error = reg_key_add_abs(ctx, ctx, key_name, 0, NULL, &tmp);
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if (!W_ERROR_EQUAL(error, WERR_ALREADY_EXISTS) &&
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!W_ERROR_IS_OK(error)) {
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DEBUG(0, ("Error adding new key '%s': %s\n",
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key_name, win_errstr(error)));
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return error;
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}
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talloc_free(tmp);
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return WERR_OK;
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}
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static WERROR reg_diff_apply_del_key(void *_ctx, const char *key_name)
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{
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struct registry_context *ctx = (struct registry_context *)_ctx;
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/* We can't proof here for success, because a common superkey could */
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/* have been deleted before the subkey's (diff order). This removed */
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/* therefore all children recursively and the "WERR_BADFILE" result is */
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/* expected. */
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reg_key_del_abs(ctx, key_name);
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return WERR_OK;
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}
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static WERROR reg_diff_apply_set_value(void *_ctx, const char *path,
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const char *value_name,
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uint32_t value_type, DATA_BLOB value)
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{
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struct registry_context *ctx = (struct registry_context *)_ctx;
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struct registry_key *tmp;
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WERROR error;
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/* Open key */
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error = reg_open_key_abs(ctx, ctx, path, &tmp);
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if (W_ERROR_EQUAL(error, WERR_BADFILE)) {
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DEBUG(0, ("Error opening key '%s'\n", path));
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return error;
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}
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/* Set value */
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error = reg_val_set(tmp, value_name,
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value_type, value);
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if (!W_ERROR_IS_OK(error)) {
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DEBUG(0, ("Error setting value '%s'\n", value_name));
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return error;
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}
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talloc_free(tmp);
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return WERR_OK;
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}
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static WERROR reg_diff_apply_del_value(void *_ctx, const char *key_name,
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const char *value_name)
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{
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struct registry_context *ctx = (struct registry_context *)_ctx;
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struct registry_key *tmp;
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WERROR error;
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/* Open key */
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error = reg_open_key_abs(ctx, ctx, key_name, &tmp);
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if (!W_ERROR_IS_OK(error)) {
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DEBUG(0, ("Error opening key '%s'\n", key_name));
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return error;
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}
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error = reg_del_value(ctx, tmp, value_name);
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if (!W_ERROR_IS_OK(error)) {
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DEBUG(0, ("Error deleting value '%s'\n", value_name));
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return error;
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}
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talloc_free(tmp);
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return WERR_OK;
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}
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static WERROR reg_diff_apply_del_all_values(void *_ctx, const char *key_name)
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{
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struct registry_context *ctx = (struct registry_context *)_ctx;
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struct registry_key *key;
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WERROR error;
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const char *value_name;
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error = reg_open_key_abs(ctx, ctx, key_name, &key);
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if (!W_ERROR_IS_OK(error)) {
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DEBUG(0, ("Error opening key '%s'\n", key_name));
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return error;
|
|
}
|
|
|
|
W_ERROR_NOT_OK_RETURN(reg_key_get_info(ctx, key, NULL,
|
|
NULL, NULL, NULL, NULL, NULL, NULL));
|
|
|
|
while (W_ERROR_IS_OK(reg_key_get_value_by_index(
|
|
ctx, key, 0, &value_name, NULL, NULL))) {
|
|
error = reg_del_value(ctx, key, value_name);
|
|
if (!W_ERROR_IS_OK(error)) {
|
|
DEBUG(0, ("Error deleting value '%s'\n", value_name));
|
|
return error;
|
|
}
|
|
talloc_free(discard_const_p(char, value_name));
|
|
}
|
|
|
|
talloc_free(key);
|
|
|
|
return WERR_OK;
|
|
}
|
|
|
|
/**
|
|
* Apply diff to a registry context
|
|
*/
|
|
_PUBLIC_ WERROR reg_diff_apply(struct registry_context *ctx,
|
|
const char *filename)
|
|
{
|
|
struct reg_diff_callbacks callbacks;
|
|
|
|
callbacks.add_key = reg_diff_apply_add_key;
|
|
callbacks.del_key = reg_diff_apply_del_key;
|
|
callbacks.set_value = reg_diff_apply_set_value;
|
|
callbacks.del_value = reg_diff_apply_del_value;
|
|
callbacks.del_all_values = reg_diff_apply_del_all_values;
|
|
callbacks.done = NULL;
|
|
|
|
return reg_diff_load(filename, &callbacks, ctx);
|
|
}
|