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/*
SSSD
System Database - View and Override related calls
Copyright (C) 2014 Sumit Bose <sbose@redhat.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "util/util.h"
#include "db/sysdb_private.h"
/* In general is should not be possible that there is a view container without
* a view name set. But to be on the safe side we return both information
* separately. */
static errno_t sysdb_get_view_name_ex(TALLOC_CTX *mem_ctx,
struct sysdb_ctx *sysdb,
char **_view_name,
bool *view_container_exists)
{
errno_t ret;
TALLOC_CTX *tmp_ctx;
const char *tmp_str;
struct ldb_dn *view_base_dn;
struct ldb_result *res;
const char *attrs[] = {SYSDB_VIEW_NAME,
NULL};
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
return ENOMEM;
}
view_base_dn = ldb_dn_new(tmp_ctx, sysdb->ldb, SYSDB_TMPL_VIEW_BASE);
if (view_base_dn == NULL) {
ret = EIO;
goto done;
}
ret = ldb_search(sysdb->ldb, tmp_ctx, &res, view_base_dn, LDB_SCOPE_BASE,
attrs, NULL);
if (ret != LDB_SUCCESS) {
ret = EIO;
goto done;
}
if (res->count > 1) {
DEBUG(SSSDBG_OP_FAILURE, "Base search returned [%d] results, "
"expected 1.\n", res->count);
ret = EINVAL;
goto done;
}
if (res->count == 0) {
*view_container_exists = false;
ret = ENOENT;
goto done;
} else {
*view_container_exists = true;
tmp_str = ldb_msg_find_attr_as_string(res->msgs[0], SYSDB_VIEW_NAME,
NULL);
if (tmp_str == NULL) {
ret = ENOENT;
goto done;
}
}
*_view_name = talloc_steal(mem_ctx, discard_const(tmp_str));
ret = EOK;
done:
talloc_free(tmp_ctx);
return ret;
}
errno_t sysdb_get_view_name(TALLOC_CTX *mem_ctx, struct sysdb_ctx *sysdb,
char **view_name)
{
bool view_container_exists;
return sysdb_get_view_name_ex(mem_ctx, sysdb, view_name,
&view_container_exists);
}
errno_t sysdb_update_view_name(struct sysdb_ctx *sysdb,
const char *view_name)
{
errno_t ret;
TALLOC_CTX *tmp_ctx;
char *tmp_str;
bool view_container_exists = false;
bool add_view_name = false;
struct ldb_message *msg;
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
return ENOMEM;
}
ret = sysdb_get_view_name_ex(tmp_ctx, sysdb, &tmp_str,
&view_container_exists);
if (ret != EOK && ret != ENOENT) {
DEBUG(SSSDBG_OP_FAILURE, "sysdb_get_view_name_ex failed.\n");
goto done;
}
if (ret == EOK) {
if (strcmp(tmp_str, view_name) == 0) {
/* view name already known, nothing to do */
DEBUG(SSSDBG_TRACE_ALL, "View name already in place.\n");
ret = EOK;
goto done;
} else {
/* view name changed */
/* not supported atm */
DEBUG(SSSDBG_CRIT_FAILURE,
"View name changed from [%s] to [%s]. NOT SUPPORTED.\n",
tmp_str, view_name);
ret = ENOTSUP;
goto done;
}
}
add_view_name = true;
msg = ldb_msg_new(tmp_ctx);
if (msg == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "ldb_msg_new failed.\n");
ret = ENOMEM;
goto done;
}
msg->dn = ldb_dn_new(tmp_ctx, sysdb->ldb, SYSDB_TMPL_VIEW_BASE);
if (msg->dn == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "ldb_dn_new failed.\n");
ret = EIO;
goto done;
}
ret = ldb_msg_add_empty(msg, SYSDB_VIEW_NAME,
add_view_name ? LDB_FLAG_MOD_ADD
: LDB_FLAG_MOD_REPLACE,
NULL);
if (ret != LDB_SUCCESS) {
ret = sysdb_error_to_errno(ret);
goto done;
}
ret = ldb_msg_add_string(msg, SYSDB_VIEW_NAME, view_name);
if (ret != LDB_SUCCESS) {
ret = sysdb_error_to_errno(ret);
goto done;
}
if (view_container_exists) {
ret = ldb_modify(sysdb->ldb, msg);
} else {
ret = ldb_add(sysdb->ldb, msg);
}
if (ret != LDB_SUCCESS) {
DEBUG(SSSDBG_FATAL_FAILURE, "Failed to %s view container",
view_container_exists ? "modify" : "add");
ret = sysdb_error_to_errno(ret);
goto done;
}
done:
talloc_free(tmp_ctx);
return ret;
}
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