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/*
Copyright Red Hat, Inc. 2004
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 2, 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; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301 USA
*/
#include <stdio.h>
#include <assert.h>
#include <libxml/xmlmemory.h>
#include <libxml/parser.h>
#include <libxml/xpath.h>
#include <string.h>
#include "xmlconf.h"
static xmlDocPtr conf_doc = NULL;
static const char *conffile = "/etc/cluster/cluster.conf";
/**
Execute an XPath query, returning the first match. Multiple matches are
ignored. Please be advised that this is quite inefficient.
@param doc Loaded XML document to search
@param ctx Predefined XML XPath context
@param query Query to execute.
@return newly allocated pointer to value or NULL if not found.
*/
char *
xpath_get_one(xmlDocPtr __attribute__ ((unused)) doc, xmlXPathContextPtr ctx, char *query)
{
char *val = NULL, *ret = NULL;
xmlXPathObjectPtr obj;
xmlNodePtr node;
size_t size = 0;
int nnv = 0;
obj = xmlXPathEvalExpression((unsigned char *)query, ctx);
if (!obj)
return NULL;
if (!obj->nodesetval)
goto out;
if (obj->nodesetval->nodeNr <= 0)
goto out;
node = obj->nodesetval->nodeTab[0];
if (!node)
goto out;
if (((node->type == XML_ATTRIBUTE_NODE) && strstr(query, "@*")) ||
((node->type == XML_ELEMENT_NODE) && strstr(query, "child::*"))) {
if (node->children && node->children->content)
size = strlen((char *)node->children->content) + strlen((char *)node->name) + 2;
else
size = strlen((char *)node->name) + 2;
nnv = 1;
} else {
if (node->children && node->children->content) {
size = strlen((char *)node->children->content) + 1;
} else {
goto out;
}
}
val = (char *)malloc(size);
if (!val)
goto out;
memset(val, 0, size);
if (nnv) {
sprintf(val, "%s=%s", node->name, (node->children && node->children->content) ?
(char *)node->children->content : "");
} else {
sprintf(val, "%s", (node->children && node->children->content) ? node->children->content :
node->name);
}
ret = val;
out:
xmlXPathFreeObject(obj);
return ret;
}
int
conf_open(void)
{
xmlInitParser();
conf_doc = xmlParseFile(conffile);
if (!conf_doc)
return -1;
return 0;
}
xmlDocPtr
conf_get_doc(void)
{
return conf_doc;
}
int
conf_close(void)
{
xmlFreeDoc(conf_doc);
conf_doc = NULL;
return 0;
}
void
conf_setconfig(char *path)
{
conffile = path;
}
int
conf_get(char *path, char **value)
{
char *foo;
xmlXPathContextPtr ctx;
ctx = xmlXPathNewContext(conf_doc);
foo = xpath_get_one(conf_doc, ctx, path);
xmlXPathFreeContext(ctx);
if (foo) {
*value = foo;
return 0;
}
return 1;
}
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