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Olof hagsand
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261
apps/netconf/netconf_lib.c
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261
apps/netconf/netconf_lib.c
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/*
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*
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Copyright (C) 2009-2016 Olof Hagsand and Benny Holmgren
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This file is part of CLICON.
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CLICON 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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CLICON 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 CLICON; see the file COPYING. If not, see
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<http://www.gnu.org/licenses/>.
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*
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* netconf lib
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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#include "clicon_config.h" /* generated by config & autoconf */
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <time.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <syslog.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <sys/param.h>
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#include <assert.h>
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/* cligen */
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#include <cligen/cligen.h>
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/* clicon */
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#include <clicon/clicon.h>
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#include "netconf_rpc.h"
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#include "netconf_lib.h"
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/*
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* Exported variables
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*/
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enum transport_type transport = NETCONF_SSH;
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int cc_closed = 0;
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static int cc_ok = 0;
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void
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netconf_ok_set(int ok)
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{
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cc_ok = ok;
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}
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int
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netconf_ok_get(void)
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{
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return cc_ok;
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}
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int
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add_preamble(cbuf *xf)
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{
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if (transport == NETCONF_SOAP)
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cprintf(xf, "\n<soapenv:Envelope\n xmlns:soapenv=\"http://www.w3.org/2003/05/soap-envelope\">\n"
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"<soapenv:Body>");
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return 0;
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}
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/*
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* add_postamble
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* add netconf xml postamble of message. That is, xml after the body of the message.
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* for soap this is the envelope stuff, for ssh this is ]]>]]>
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*/
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int
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add_postamble(cbuf *xf)
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{
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switch (transport){
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case NETCONF_SSH:
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cprintf(xf, "]]>]]>"); /* Add RFC4742 end-of-message marker */
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break;
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case NETCONF_SOAP:
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cprintf(xf, "\n</soapenv:Body>" "</soapenv:Envelope>");
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break;
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}
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return 0;
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}
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/*
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* add_error_preamble
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* compared to regular messages (see add_preamble), error message differ in some
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* protocols (eg soap) by adding a longer and deeper header.
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*/
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int
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add_error_preamble(cbuf *xf, char *reason)
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{
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switch (transport){
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case NETCONF_SOAP:
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cprintf(xf, "<soapenv:Envelope xmlns:soapenv=\"http://www.w3.org/2003/05/soap-envelope\" xmlns:xml=\"http://www.w3.org/XML/1998/namespace\">"
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"<soapenv:Body>"
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"<soapenv:Fault>"
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"<soapenv:Code>"
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"<soapenv:Value>env:Receiver</soapenv:Value>"
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"</soapenv:Code>"
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"<soapenv:Reason>"
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"<soapenv:Text xml:lang=\"en\">%s</soapenv:Text>"
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"</soapenv:Reason>"
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"<detail>", reason);
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break;
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default:
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if (add_preamble(xf) < 0)
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return -1;
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break;
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}
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return 0;
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}
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/*
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* add_error_postamble
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* compared to regular messages (see add_postamble), error message differ in some
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* protocols (eg soap) by adding a longer and deeper header.
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*/
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int
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add_error_postamble(cbuf *xf)
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{
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switch (transport){
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case NETCONF_SOAP:
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cprintf(xf, "</detail>" "</soapenv:Fault>");
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default: /* fall through */
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if (add_postamble(xf) < 0)
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return -1;
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break;
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}
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return 0;
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}
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/*! Look for a text pattern in an input string, one char at a time
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* @param[in] tag What to look for
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* @param[in] ch New input character
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* @param[in,out] state A state integer holding how far we have parsed.
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* @retval 0 No, we havent detected end tag
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* @retval 1 Yes, we have detected end tag!
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* XXX: move to clicon_xml?
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*/
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int
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detect_endtag(char *tag, char ch, int *state)
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{
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int retval = 0;
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if (tag[*state] == ch){
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(*state)++;
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if (*state == strlen(tag)){
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*state = 0;
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retval = 1;
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}
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}
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else
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*state = 0;
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return retval;
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}
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/*
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* target_locked
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* return 1 if locked, 0 if not.
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* return clientid if locked.
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*/
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int
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target_locked(enum target_type target, int *client)
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{
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return 0;
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}
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/*
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* unlock_target
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*/
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int
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unlock_target(enum target_type target)
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{
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return 0;
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}
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int
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lock_target(enum target_type target)
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{
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return 0;
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}
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/*! Get "target" attribute, return actual database given candidate or running
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* Caller must do error handling
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* @retval dbname Actual database file name
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*/
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char *
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netconf_get_target(clicon_handle h, cxobj *xn, char *path)
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{
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cxobj *x;
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char *target = NULL;
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char *running_db;
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char *candidate_db;
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if ((running_db = clicon_running_db(h)) == NULL)
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goto done;
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if ((candidate_db = clicon_candidate_db(h)) == NULL)
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goto done;
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if ((x = xpath_first(xn, path)) != NULL){
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if (xpath_first(x, "candidate") != NULL)
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target = candidate_db;
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else
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if (xpath_first(x, "running") != NULL)
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target = running_db;
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}
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done:
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return target;
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}
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/*! Send netconf message from cbuf on socket
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* @param[in] s
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* @param[in] cb Cligen buffer that contains the XML message
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* @param[in] msg Only for debug
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*/
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int
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netconf_output(int s, cbuf *xf, char *msg)
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{
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char *buf = cbuf_get(xf);
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int len = cbuf_len(xf);
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int retval = -1;
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clicon_debug(1, "SEND %s", msg);
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if (debug > 1){ /* XXX: below only works to stderr, clicon_debug may log to syslog */
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cxobj *xt = NULL;
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if (clicon_xml_parse_string(&buf, &xt) == 0){
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clicon_xml2file(stderr, xml_child_i(xt, 0), 0, 0);
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fprintf(stderr, "\n");
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xml_free(xt);
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}
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}
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if (write(s, buf, len) < 0){
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if (errno == EPIPE)
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;
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else
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clicon_log(LOG_ERR, "%s: write: %s", __FUNCTION__, strerror(errno));
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goto done;
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}
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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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