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|
/* -*- mode: C; c-file-style: "gnu" -*- */
/* config-loader-libxml.c libxml2 XML loader
*
* Copyright (C) 2003 Red Hat, Inc.
*
* Licensed under the Academic Free License version 2.0
*
* 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 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "config-parser.h"
#include <dbus/dbus-internals.h>
#include <libxml/xmlreader.h>
#include <libxml/parser.h>
#include <libxml/globals.h>
#include <libxml/xmlmemory.h>
#include <errno.h>
#include <string.h>
static void*
libxml_malloc (size_t size)
{
return dbus_malloc (size);
}
static void*
libxml_realloc (void *ptr, size_t size)
{
return dbus_realloc (ptr, size);
}
static void
libxml_free (void *ptr)
{
dbus_free (ptr);
}
static char*
libxml_strdup (const char *str)
{
return _dbus_strdup (str);
}
static void
xml_text_reader_error (void *arg,
const char *msg,
xmlParserSeverities severity,
xmlTextReaderLocatorPtr locator)
{
DBusError *error = arg;
if (!dbus_error_is_set (error))
{
dbus_set_error (error, DBUS_ERROR_FAILED,
"Error loading config file: %s",
msg);
}
}
BusConfigParser*
bus_config_load (const DBusString *file,
dbus_bool_t is_toplevel,
const BusConfigParser *parent,
DBusError *error)
{
xmlTextReader *reader;
const char *filename;
BusConfigParser *parser;
DBusString dirname;
DBusError tmp_error;
int ret;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
filename = _dbus_string_get_const_data (file);
parser = NULL;
reader = NULL;
dbus_error_init (&tmp_error);
if (xmlMemSetup (libxml_free,
libxml_malloc,
libxml_realloc,
libxml_strdup) != 0)
{
/* Current libxml can't possibly fail here, but just being
* paranoid; don't really know why xmlMemSetup() returns an
* error code, assuming some version of libxml had a reason.
*/
dbus_set_error (error, DBUS_ERROR_FAILED,
"xmlMemSetup() didn't work for some reason\n");
return NULL;
}
if (!_dbus_string_init (&dirname))
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
return NULL;
}
if (!_dbus_string_get_dirname (file, &dirname))
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
goto failed;
}
parser = bus_config_parser_new (&dirname, is_toplevel, parent);
if (parser == NULL)
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
goto failed;
}
errno = 0;
reader = xmlNewTextReaderFilename (filename);
if (reader == NULL)
{
dbus_set_error (error, DBUS_ERROR_FAILED,
"Failed to load configuration file %s: %s\n",
filename,
errno != 0 ? strerror (errno) : "Unknown error");
goto failed;
}
xmlTextReaderSetErrorHandler (reader, xml_text_reader_error, &tmp_error);
while ((ret = xmlTextReaderRead (reader)) == 1)
{
int type;
if (dbus_error_is_set (&tmp_error))
goto reader_out;
/* "enum" anyone? http://dotgnu.org/pnetlib-doc/System/Xml/XmlNodeType.html for
* the magic numbers
*/
type = xmlTextReaderNodeType (reader);
if (dbus_error_is_set (&tmp_error))
goto reader_out;
/* FIXME I don't really know exactly what I need to do to
* resolve all entities and so on to get the full content of a
* node or attribute value. I'm worried about whether I need to
* manually handle stuff like <
*/
}
if (ret == -1)
{
if (!dbus_error_is_set (&tmp_error))
dbus_set_error (&tmp_error,
DBUS_ERROR_FAILED,
"Unknown failure loading configuration file");
}
reader_out:
xmlFreeTextReader (reader);
reader = NULL;
if (dbus_error_is_set (&tmp_error))
{
dbus_move_error (&tmp_error, error);
goto failed;
}
if (!bus_config_parser_finished (parser, error))
goto failed;
_dbus_string_free (&dirname);
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
return parser;
failed:
_DBUS_ASSERT_ERROR_IS_SET (error);
_dbus_string_free (&dirname);
if (parser)
bus_config_parser_unref (parser);
_dbus_assert (reader == NULL); /* must go to reader_out first */
return NULL;
}
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