692 lines
18 KiB
C
692 lines
18 KiB
C
/*
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*
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***** BEGIN LICENSE BLOCK *****
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Copyright (C) 2009-2018 Olof Hagsand and Benny Holmgren
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This file is part of CLIXON.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Alternatively, the contents of this file may be used under the terms of
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the GNU General Public License Version 3 or later (the "GPL"),
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in which case the provisions of the GPL are applicable instead
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of those above. If you wish to allow use of your version of this file only
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under the terms of the GPL, and not to allow others to
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use your version of this file under the terms of Apache License version 2,
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indicate your decision by deleting the provisions above and replace them with
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the notice and other provisions required by the GPL. If you do not delete
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the provisions above, a recipient may use your version of this file under
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the terms of any one of the Apache License version 2 or the GPL.
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***** END LICENSE BLOCK *****
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <signal.h>
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#include <syslog.h>
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#include <dlfcn.h>
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#include <fcntl.h>
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#include <time.h>
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#include <signal.h>
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#include <libgen.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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#include <sys/param.h>
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/* cligen */
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#include <cligen/cligen.h>
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/* clixon */
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#include "clixon_err.h"
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#include "clixon_log.h"
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#include "clixon_queue.h"
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#include "clixon_hash.h"
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#include "clixon_handle.h"
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#include "clixon_yang.h"
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#include "clixon_xml.h"
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#include "clixon_plugin.h"
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#include "clixon_options.h"
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#include "clixon_xml_db.h"
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/* Set to log get and put requests */
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#define DEBUG 0
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/*! Load an xmldb storage plugin according to filename
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* If init function fails (not found, wrong version, etc) print a log and dont
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* add it.
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* @param[in] h CLicon handle
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* @param[in] filename Actual filename including path
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*/
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int
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xmldb_plugin_load(clicon_handle h,
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char *filename)
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{
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int retval = -1;
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char *dlerrcode;
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plugin_init_t *initfun;
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plghndl_t handle = NULL;
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char *error;
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struct xmldb_api *xa = NULL;
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dlerror(); /* Clear any existing error */
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if ((handle = dlopen(filename, RTLD_NOW|RTLD_GLOBAL)) == NULL) {
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error = (char*)dlerror();
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clicon_err(OE_PLUGIN, errno, "dlopen: %s", error ? error : "Unknown error");
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goto done;
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}
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/* Try v1 */
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initfun = dlsym(handle, XMLDB_PLUGIN_INIT_FN);
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if ((dlerrcode = (char*)dlerror()) != NULL) {
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clicon_log(LOG_WARNING, "Error when loading init function %s: %s",
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XMLDB_PLUGIN_INIT_FN, dlerrcode);
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goto fail;
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}
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if ((xa = initfun(XMLDB_API_VERSION)) == NULL) {
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clicon_log(LOG_WARNING, "%s: failed when running init function %s: %s",
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filename, XMLDB_PLUGIN_INIT_FN, errno?strerror(errno):"");
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goto fail;
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}
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if (xa->xa_version != XMLDB_API_VERSION){
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clicon_log(LOG_WARNING, "%s: Unexpected plugin version number: %d",
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filename, xa->xa_version);
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goto fail;
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}
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if (xa->xa_magic != XMLDB_API_MAGIC){
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clicon_log(LOG_WARNING, "%s: Wrong plugin magic number: %x",
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filename, xa->xa_magic);
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goto fail;
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}
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/* Add plugin */
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if (clicon_xmldb_plugin_set(h, handle) < 0)
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goto done;
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/* Add API */
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if (clicon_xmldb_api_set(h, xa) < 0)
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goto done;
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clicon_log(LOG_DEBUG, "xmldb plugin %s loaded", filename);
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retval = 0;
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done:
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if (retval < 0 && handle)
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dlclose(handle);
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return retval;
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fail: /* plugin load failed, continue */
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retval = 0;
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goto done;
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}
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/*! Unload the xmldb storage plugin
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* @param[in] h Clicon handle
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* @retval 0 OK
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* @retval -1 Error
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*/
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int
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xmldb_plugin_unload(clicon_handle h)
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{
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int retval = -1;
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plghndl_t handle;
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struct xmldb_api *xa;
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xmldb_handle xh;
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char *error;
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if ((handle = clicon_xmldb_plugin_get(h)) == NULL)
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goto ok; /* OK, may not have been initialized */
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/* If connected storage handle then disconnect */
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if ((xh = clicon_xmldb_handle_get(h)) != NULL)
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xmldb_disconnect(h); /* sets xmldb handle to NULL */
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/* Deregister api */
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if ((xa = clicon_xmldb_api_get(h)) != NULL){
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/* Call plugin_exit */
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if (xa->xa_plugin_exit_fn != NULL)
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xa->xa_plugin_exit_fn();
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/* Deregister API (it is allocated in plugin) */
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clicon_xmldb_api_set(h, NULL);
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}
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/* Unload plugin */
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dlerror(); /* Clear any existing error */
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if (dlclose(handle) != 0) {
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error = (char*)dlerror();
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clicon_err(OE_PLUGIN, errno, "dlclose: %s", error ? error : "Unknown error");
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/* Just report no -1 return*/
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}
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ok:
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retval = 0;
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// done:
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return retval;
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}
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/*! Validate database name
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* @param[in] db Name of database
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* @param[out] xret Return value as cligen buffer containing xml netconf return
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* @retval 0 OK
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* @retval -1 Failed validate, xret set to error
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*/
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int
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xmldb_validate_db(const char *db)
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{
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if (strcmp(db, "running") != 0 &&
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strcmp(db, "candidate") != 0 &&
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strcmp(db, "startup") != 0 &&
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strcmp(db, "tmp") != 0)
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return -1;
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return 0;
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}
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/*! Connect to a datastore plugin, allocate handle to be used in API calls
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* @param[in] h Clicon handle
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* @retval 0 OK
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* @retval -1 Error
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* @note You can do several connects, and have multiple connections to the same
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* datastore. Note also that the xmldb handle is hidden in the clicon
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* handle, the clixon user does not need to handle it. Note also that
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* typically only the backend invokes the datastore.
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*/
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int
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xmldb_connect(clicon_handle h)
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{
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int retval = -1;
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xmldb_handle xh;
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struct xmldb_api *xa;
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if ((xa = clicon_xmldb_api_get(h)) == NULL){
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clicon_err(OE_DB, 0, "No xmldb plugin");
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goto done;
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}
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if (xa->xa_connect_fn == NULL){
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clicon_err(OE_DB, 0, "No xmldb function");
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goto done;
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}
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if ((xh = xa->xa_connect_fn()) == NULL)
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goto done;
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clicon_xmldb_handle_set(h, xh);
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retval = 0;
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done:
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return retval;
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}
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/*! Disconnect from a datastore plugin and deallocate handle
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* @param[in] handle Disconect and deallocate from this handle
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* @retval 0 OK
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* @retval -1 Error
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*/
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int
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xmldb_disconnect(clicon_handle h)
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{
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int retval = -1;
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xmldb_handle xh;
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struct xmldb_api *xa;
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if ((xa = clicon_xmldb_api_get(h)) == NULL){
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clicon_err(OE_DB, 0, "No xmldb plugin");
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goto done;
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}
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if (xa->xa_disconnect_fn == NULL){
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clicon_err(OE_DB, 0, "No xmldb function");
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goto done;
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}
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if ((xh = clicon_xmldb_handle_get(h)) == NULL){
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clicon_err(OE_DB, 0, "Already disconnected from datastore plugin");
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goto done;
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}
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if (xa->xa_disconnect_fn(xh) < 0)
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goto done;
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clicon_xmldb_handle_set(h, NULL);
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retval = 0;
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done:
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return retval;
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}
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/*! Get value of generic plugin option. Type of value is givenby context
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* @param[in] h Clicon handle
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* @param[in] optname Option name
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* @param[out] value Pointer to Value of option
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* @retval 0 OK
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* @retval -1 Error
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*/
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int
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xmldb_getopt(clicon_handle h,
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char *optname,
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void **value)
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{
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int retval = -1;
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xmldb_handle xh;
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struct xmldb_api *xa;
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if ((xa = clicon_xmldb_api_get(h)) == NULL){
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clicon_err(OE_DB, 0, "No xmldb plugin");
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goto done;
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}
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if (xa->xa_getopt_fn == NULL){
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clicon_err(OE_DB, 0, "No xmldb function");
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goto done;
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}
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if ((xh = clicon_xmldb_handle_get(h)) == NULL){
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clicon_err(OE_DB, 0, "Not connected to datastore plugin");
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goto done;
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}
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retval = xa->xa_getopt_fn(xh, optname, value);
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done:
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return retval;
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}
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/*! Set value of generic plugin option. Type of value is givenby context
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* @param[in] h Clicon handle
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* @param[in] optname Option name
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* @param[in] value Value of option
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* @retval 0 OK
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* @retval -1 Error
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*/
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int
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xmldb_setopt(clicon_handle h,
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char *optname,
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void *value)
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{
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int retval = -1;
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xmldb_handle xh;
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struct xmldb_api *xa;
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if ((xa = clicon_xmldb_api_get(h)) == NULL){
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clicon_err(OE_DB, 0, "No xmldb plugin");
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goto done;
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}
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if (xa->xa_setopt_fn == NULL){
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clicon_err(OE_DB, 0, "No xmldb function");
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goto done;
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}
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if ((xh = clicon_xmldb_handle_get(h)) == NULL){
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clicon_err(OE_DB, 0, "Not connected to datastore plugin");
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goto done;
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}
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retval = xa->xa_setopt_fn(xh, optname, value);
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done:
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return retval;
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}
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/*! Get content of database using xpath. return a set of matching sub-trees
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* The function returns a minimal tree that includes all sub-trees that match
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* xpath.
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* @param[in] h Clicon handle
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* @param[in] dbname Name of database to search in (filename including dir path
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* @param[in] xpath String with XPATH syntax. or NULL for all
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* @param[in] config If set only configuration data, else also state
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* @param[out] xret Single return XML tree. Free with xml_free()
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* @retval 0 OK
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* @retval -1 Error
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* @code
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* cxobj *xt;
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* if (xmldb_get(xh, "running", "/interfaces/interface[name="eth"]", 1, &xt) < 0)
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* err;
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* xml_free(xt);
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* @endcode
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* @note if xvec is given, then purge tree, if not return whole tree.
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* @see xpath_vec
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*/
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int
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xmldb_get(clicon_handle h,
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const char *db,
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char *xpath,
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int config,
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cxobj **xret)
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{
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int retval = -1;
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xmldb_handle xh;
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struct xmldb_api *xa;
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if ((xa = clicon_xmldb_api_get(h)) == NULL){
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clicon_err(OE_DB, 0, "No xmldb plugin");
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goto done;
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}
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if (xa->xa_get_fn == NULL){
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clicon_err(OE_DB, 0, "No xmldb function");
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goto done;
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}
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if ((xh = clicon_xmldb_handle_get(h)) == NULL){
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clicon_err(OE_DB, 0, "Not connected to datastore plugin");
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goto done;
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}
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retval = xa->xa_get_fn(xh, db, xpath, config, xret);
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#if DEBUG
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if (retval == 0) {
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cbuf *cb = cbuf_new();
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clicon_xml2cbuf(cb, *xret, 0, 0);
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clicon_log(LOG_WARNING, "%s: db:%s xpath:%s xml:%s",
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__FUNCTION__, db, xpath, cbuf_get(cb));
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cbuf_free(cb);
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}
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#endif
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done:
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return retval;
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}
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/*! Modify database given an xml tree and an operation
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*
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* @param[in] h CLICON handle
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* @param[in] db running or candidate
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* @param[in] op Top-level operation, can be superceded by other op in tree
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* @param[in] xt xml-tree. Top-level symbol is dummy
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* @param[out] cbret Initialized cligen buffer or NULL. On exit contains XML or "".
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* @retval 0 OK
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* @retval -1 Error
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* The xml may contain the "operation" attribute which defines the operation.
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* @code
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* cxobj *xt;
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* cxobj *xret = NULL;
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* if (xml_parse_string("<a>17</a>", yspec, &xt) < 0)
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* err;
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* if (xmldb_put(xh, "running", OP_MERGE, xt, cbret) < 0)
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* err;
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* @endcode
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* @note that you can add both config data and state data. In comparison,
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* xmldb_get has a parameter to get config data only.
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* @note if xret is non-null, it may contain error message
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*
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*/
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int
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xmldb_put(clicon_handle h,
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const char *db,
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enum operation_type op,
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cxobj *xt,
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cbuf *cbret)
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{
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int retval = -1;
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xmldb_handle xh;
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struct xmldb_api *xa;
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if ((xa = clicon_xmldb_api_get(h)) == NULL){
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clicon_err(OE_DB, 0, "No xmldb plugin");
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goto done;
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}
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if (xa->xa_put_fn == NULL){
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clicon_err(OE_DB, 0, "No xmldb function");
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goto done;
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}
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if ((xh = clicon_xmldb_handle_get(h)) == NULL){
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clicon_err(OE_DB, 0, "Not connected to datastore plugin");
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goto done;
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}
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#if DEBUG
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{
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cbuf *cb = cbuf_new();
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if (xt)
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if (clicon_xml2cbuf(cb, xt, 0, 0) < 0)
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goto done;
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clicon_log(LOG_WARNING, "%s: db:%s op:%d xml:%s", __FUNCTION__,
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db, op, cbuf_get(cb));
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cbuf_free(cb);
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}
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#endif
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retval = xa->xa_put_fn(xh, db, op, xt, cbret);
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done:
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return retval;
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}
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/*! Copy database from db1 to db2
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* @param[in] h Clicon handle
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* @param[in] from Source database
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* @param[in] to Destination database
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* @retval -1 Error
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* @retval 0 OK
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*/
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int
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xmldb_copy(clicon_handle h,
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const char *from,
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const char *to)
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{
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int retval = -1;
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xmldb_handle xh;
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struct xmldb_api *xa;
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if ((xa = clicon_xmldb_api_get(h)) == NULL){
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clicon_err(OE_DB, 0, "No xmldb plugin");
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goto done;
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}
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if (xa->xa_copy_fn == NULL){
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clicon_err(OE_DB, 0, "No xmldb function");
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goto done;
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}
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if ((xh = clicon_xmldb_handle_get(h)) == NULL){
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clicon_err(OE_DB, 0, "Not connected to datastore plugin");
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goto done;
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}
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retval = xa->xa_copy_fn(xh, from, to);
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done:
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return retval;
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}
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/*! Lock database
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* @param[in] h Clicon handle
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* @param[in] db Database
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* @param[in] pid Process id
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* @retval -1 Error
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* @retval 0 OK
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*/
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int
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xmldb_lock(clicon_handle h,
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const char *db,
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int pid)
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{
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int retval = -1;
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xmldb_handle xh;
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struct xmldb_api *xa;
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if ((xa = clicon_xmldb_api_get(h)) == NULL){
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clicon_err(OE_DB, 0, "No xmldb plugin");
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goto done;
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}
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if (xa->xa_lock_fn == NULL){
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clicon_err(OE_DB, 0, "No xmldb function");
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goto done;
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}
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if ((xh = clicon_xmldb_handle_get(h)) == NULL){
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clicon_err(OE_DB, 0, "Not connected to datastore plugin");
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goto done;
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}
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retval = xa->xa_lock_fn(xh, db, pid);
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done:
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return retval;
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}
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/*! Unlock database
|
|
* @param[in] h Clicon handle
|
|
* @param[in] db Database
|
|
* @param[in] pid Process id
|
|
* @retval -1 Error
|
|
* @retval 0 OK
|
|
* Assume all sanity checks have been made
|
|
*/
|
|
int
|
|
xmldb_unlock(clicon_handle h,
|
|
const char *db)
|
|
{
|
|
int retval = -1;
|
|
xmldb_handle xh;
|
|
struct xmldb_api *xa;
|
|
|
|
if ((xa = clicon_xmldb_api_get(h)) == NULL){
|
|
clicon_err(OE_DB, 0, "No xmldb plugin");
|
|
goto done;
|
|
}
|
|
if (xa->xa_unlock_fn == NULL){
|
|
clicon_err(OE_DB, 0, "No xmldb function");
|
|
goto done;
|
|
}
|
|
if ((xh = clicon_xmldb_handle_get(h)) == NULL){
|
|
clicon_err(OE_DB, 0, "Not connected to datastore plugin");
|
|
goto done;
|
|
}
|
|
retval = xa->xa_unlock_fn(xh, db);
|
|
done:
|
|
return retval;
|
|
}
|
|
|
|
/*! Unlock all databases locked by pid (eg process dies)
|
|
* @param[in] h Clicon handle
|
|
* @param[in] pid Process / Session id
|
|
* @retval -1 Error
|
|
* @retval 0 OK
|
|
*/
|
|
int
|
|
xmldb_unlock_all(clicon_handle h,
|
|
int pid)
|
|
{
|
|
int retval = -1;
|
|
xmldb_handle xh;
|
|
struct xmldb_api *xa;
|
|
|
|
if ((xa = clicon_xmldb_api_get(h)) == NULL){
|
|
clicon_err(OE_DB, 0, "No xmldb plugin");
|
|
goto done;
|
|
}
|
|
if (xa->xa_unlock_all_fn == NULL){
|
|
clicon_err(OE_DB, 0, "No xmldb function");
|
|
goto done;
|
|
}
|
|
if ((xh = clicon_xmldb_handle_get(h)) == NULL){
|
|
clicon_err(OE_DB, 0, "Not connected to datastore plugin");
|
|
goto done;
|
|
}
|
|
retval = xa->xa_unlock_all_fn(xh, pid);
|
|
done:
|
|
return retval;
|
|
}
|
|
|
|
/*! Check if database is locked
|
|
* @param[in] h Clicon handle
|
|
* @param[in] db Database
|
|
* @retval -1 Error
|
|
* @retval 0 Not locked
|
|
* @retval >0 Id of locker
|
|
*/
|
|
int
|
|
xmldb_islocked(clicon_handle h,
|
|
const char *db)
|
|
{
|
|
int retval = -1;
|
|
xmldb_handle xh;
|
|
struct xmldb_api *xa;
|
|
|
|
if ((xa = clicon_xmldb_api_get(h)) == NULL){
|
|
clicon_err(OE_DB, 0, "No xmldb plugin");
|
|
goto done;
|
|
}
|
|
if (xa->xa_islocked_fn == NULL){
|
|
clicon_err(OE_DB, 0, "No xmldb function");
|
|
goto done;
|
|
}
|
|
if ((xh = clicon_xmldb_handle_get(h)) == NULL){
|
|
clicon_err(OE_DB, 0, "Not connected to datastore plugin");
|
|
goto done;
|
|
}
|
|
retval = xa->xa_islocked_fn(xh, db);
|
|
done:
|
|
return retval;
|
|
}
|
|
|
|
/*! Check if db exists
|
|
* @param[in] h Clicon handle
|
|
* @param[in] db Database
|
|
* @retval -1 Error
|
|
* @retval 0 No it does not exist
|
|
* @retval 1 Yes it exists
|
|
*/
|
|
int
|
|
xmldb_exists(clicon_handle h,
|
|
const char *db)
|
|
{
|
|
int retval = -1;
|
|
xmldb_handle xh;
|
|
struct xmldb_api *xa;
|
|
|
|
if ((xa = clicon_xmldb_api_get(h)) == NULL){
|
|
clicon_err(OE_DB, 0, "No xmldb plugin");
|
|
goto done;
|
|
}
|
|
if (xa->xa_exists_fn == NULL){
|
|
clicon_err(OE_DB, 0, "No xmldb function");
|
|
goto done;
|
|
}
|
|
if ((xh = clicon_xmldb_handle_get(h)) == NULL){
|
|
clicon_err(OE_DB, 0, "Not connected to datastore plugin");
|
|
goto done;
|
|
}
|
|
retval = xa->xa_exists_fn(xh, db);
|
|
done:
|
|
return retval;
|
|
}
|
|
|
|
/*! Delete database. Remove file
|
|
* @param[in] h Clicon handle
|
|
* @param[in] db Database
|
|
* @retval -1 Error
|
|
* @retval 0 OK
|
|
*/
|
|
int
|
|
xmldb_delete(clicon_handle h,
|
|
const char *db)
|
|
{
|
|
int retval = -1;
|
|
xmldb_handle xh;
|
|
struct xmldb_api *xa;
|
|
|
|
if ((xa = clicon_xmldb_api_get(h)) == NULL){
|
|
clicon_err(OE_DB, 0, "No xmldb plugin");
|
|
goto done;
|
|
}
|
|
if (xa->xa_delete_fn == NULL){
|
|
clicon_err(OE_DB, 0, "No xmldb function");
|
|
goto done;
|
|
}
|
|
if ((xh = clicon_xmldb_handle_get(h)) == NULL){
|
|
clicon_err(OE_DB, 0, "Not connected to datastore plugin");
|
|
goto done;
|
|
}
|
|
retval = xa->xa_delete_fn(xh, db);
|
|
done:
|
|
return retval;
|
|
}
|
|
|
|
/*! Create a database. Open database for writing.
|
|
* @param[in] h Clicon handle
|
|
* @param[in] db Database
|
|
* @retval 0 OK
|
|
* @retval -1 Error
|
|
*/
|
|
int
|
|
xmldb_create(clicon_handle h,
|
|
const char *db)
|
|
{
|
|
int retval = -1;
|
|
xmldb_handle xh;
|
|
struct xmldb_api *xa;
|
|
|
|
if ((xa = clicon_xmldb_api_get(h)) == NULL){
|
|
clicon_err(OE_DB, 0, "No xmldb plugin");
|
|
goto done;
|
|
}
|
|
if (xa->xa_create_fn == NULL){
|
|
clicon_err(OE_DB, 0, "No xmldb function");
|
|
goto done;
|
|
}
|
|
if ((xh = clicon_xmldb_handle_get(h)) == NULL){
|
|
clicon_err(OE_DB, 0, "Not connected to datastore plugin");
|
|
goto done;
|
|
}
|
|
retval = xa->xa_create_fn(xh, db);
|
|
done:
|
|
return retval;
|
|
}
|