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/***************************************************************************
* *
* liblazy *
* *
* Copyright (C) 2006,2007 Holger Macht <holger@homac.de> *
* *
* Author(s): Holger Macht <holger@homac.de> *
* *
* This library is free software; you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as published *
* by the Free Software Foundation; either version 2.1 of the License, or *
* (at your option) any later version. *
* *
* This library 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA *
* 02110-1301 USA *
* *
***************************************************************************/
#include "liblazy.h"
#include "liblazy_local.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#define DBUS_HAL_SERVICE "org.freedesktop.Hal"
#define DBUS_HAL_DEVICE_INTERFACE "org.freedesktop.Hal.Device"
#define DBUS_HAL_MANAGER_PATH "/org/freedesktop/Hal/Manager"
#define DBUS_HAL_MANAGER_INTERFACE "org.freedesktop.Hal.Manager"
#define DBUS_HAL_COMPUTER_PATH "/org/freedesktop/Hal/devices/computer"
static int liblazy_hal_property_exists(const char *udi, const char *property)
{
int error = 0;
int exists = 0;
DBusMessage *reply;
if (udi == NULL || property == NULL)
return LIBLAZY_ERROR_INVALID_ARGUMENT;
error = liblazy_dbus_system_send_method_call(DBUS_HAL_SERVICE,
udi,
DBUS_HAL_DEVICE_INTERFACE,
"PropertyExists",
&reply,
DBUS_TYPE_STRING,
&property,
DBUS_TYPE_INVALID);
if (error) {
ERROR("Error checking if property '%s' exists", property);
return error;
}
error = liblazy_dbus_message_get_basic_arg(reply, DBUS_TYPE_BOOLEAN,
&exists, 0);
if (reply != NULL)
dbus_message_unref(reply);
if (exists == 1)
return 1;
return error;
}
static int liblazy_hal_get_property(const char *udi, const char *property,
const char *method, int type, void *value)
{
int error = 0;
DBusMessage *reply;
if (udi == NULL || property == NULL )
return LIBLAZY_ERROR_INVALID_ARGUMENT;
error = liblazy_dbus_system_send_method_call(DBUS_HAL_SERVICE,
udi,
DBUS_HAL_DEVICE_INTERFACE,
method,
&reply,
DBUS_TYPE_STRING,
&property,
DBUS_TYPE_INVALID);
if (error) {
ERROR("Error sending '%s' to HAL", method);
return error;
}
error = liblazy_dbus_message_get_basic_arg(reply, type, value, 0);
if (reply != NULL)
dbus_message_unref(reply);
if (error)
ERROR("Error fetching property '%s'", property);
return error;
}
static int liblazy_hal_get_strlist_manager(char ***strlist, const char *method,
int first_arg_type, ...)
{
int error = 0;
DBusMessage *reply;
va_list var_args;
va_start(var_args, first_arg_type);
error = liblazy_dbus_send_method_call(DBUS_HAL_SERVICE,
DBUS_HAL_MANAGER_PATH,
DBUS_HAL_MANAGER_INTERFACE,
method,
DBUS_BUS_SYSTEM,
&reply,
first_arg_type,
var_args);
va_end(var_args);
if (error) {
ERROR("Error while sending method %s to HAL", method);
return error;
}
error = liblazy_dbus_message_get_strlist_arg(reply, strlist, 0);
if (reply != NULL)
dbus_message_unref(reply);
return error;
}
int liblazy_hal_get_property_string(const char *udi, const char *property,
char **value)
{
char *str;
int ret;
ret = liblazy_hal_property_exists(udi, property);
if (ret != 1) {
if (ret == 0)
ret = LIBLAZY_ERROR_HAL_NO_SUCH_PROPERTY;
goto Error;
}
ret = liblazy_hal_get_property(udi, property, "GetPropertyString",
DBUS_TYPE_STRING, &str);
if (ret)
goto Error;
*value = strdup(str);
return ret;
Error:
*value = NULL;
return ret;
}
int liblazy_hal_get_property_int(const char *udi, const char *property,
int *value)
{
int ret;
ret = liblazy_hal_property_exists(udi, property);
if (ret != 1) {
if (ret == 0)
ret = LIBLAZY_ERROR_HAL_NO_SUCH_PROPERTY;
*value = -1;
return ret;
}
return liblazy_hal_get_property(udi, property, "GetPropertyInteger",
DBUS_TYPE_INT32, value);
}
int liblazy_hal_get_property_bool(const char *udi, const char *property,
int *value)
{
int ret;
ret = liblazy_hal_property_exists(udi, property);
if (ret != 1) {
if (ret == 0)
ret = LIBLAZY_ERROR_HAL_NO_SUCH_PROPERTY;
*value = -1;
return ret;
}
return liblazy_hal_get_property(udi, property, "GetPropertyBoolean",
DBUS_TYPE_BOOLEAN, value);
}
int liblazy_hal_get_property_strlist(const char *udi, const char *property,
char ***strlist)
{
int error = 0;
DBusMessage *reply;
if (udi == NULL || property == NULL )
return LIBLAZY_ERROR_INVALID_ARGUMENT;
error = liblazy_hal_property_exists(udi, property);
if (error != 1) {
if (error == 0)
error = LIBLAZY_ERROR_HAL_NO_SUCH_PROPERTY;
goto Error;
}
error = liblazy_dbus_system_send_method_call(DBUS_HAL_SERVICE,
udi,
DBUS_HAL_DEVICE_INTERFACE,
"GetPropertyStringList",
&reply,
DBUS_TYPE_STRING,
&property,
DBUS_TYPE_INVALID);
if (error) {
ERROR("Error while getting strlist property %s from HAL", property);
goto Error;
}
error = liblazy_dbus_message_get_strlist_arg(reply, strlist, 0);
if (reply != NULL)
dbus_message_unref(reply);
if (error)
goto Error;
return error;
Error:
strlist[0] = NULL;
return error;
}
int liblazy_hal_query_capability(const char *udi, const char *capability)
{
int i;
int error = -1;
char **caps = NULL;
if (udi == NULL || capability == NULL )
return LIBLAZY_ERROR_INVALID_ARGUMENT;
error = liblazy_hal_get_property_strlist(udi, "info.capabilities", &caps);
if (error)
return error;
if (caps != NULL) {
for (i = 0; caps[i] != NULL; i++) {
if (strcmp(caps[i], capability) == 0)
error = 1;
}
liblazy_free_strlist(caps);
}
return error;
}
int liblazy_hal_find_device_by_capability(const char *capability, char ***strlist)
{
int error;
error = liblazy_hal_get_strlist_manager(strlist, "FindDeviceByCapability",
DBUS_TYPE_STRING, &capability,
DBUS_TYPE_INVALID);
if (error) {
strlist[0] = NULL;
*strlist = NULL;
}
return error;
}
int liblazy_hal_find_device_by_string_match(const char *key, const char *value,
char ***strlist)
{
int error;
error = liblazy_hal_get_strlist_manager(strlist, "FindDeviceStringMatch",
DBUS_TYPE_STRING, &key,
DBUS_TYPE_STRING, &value, DBUS_TYPE_INVALID);
if (error) {
strlist[0] = NULL;
*strlist = NULL;
}
return error;
}
int liblazy_hal_is_caller_privileged(const char *privilege)
{
DBusMessage *reply;
DBusError dbus_error;
DBusConnection *dbus_connection;
const char *unique_name;
char *allowed;
int error = 0;
if (privilege == NULL )
return LIBLAZY_ERROR_INVALID_ARGUMENT;
dbus_error_init(&dbus_error);
dbus_connection = dbus_bus_get(DBUS_BUS_SYSTEM, &dbus_error);
if (dbus_error_is_set(&dbus_error)) {
ERROR("Connection to dbus not ready, skipping privilege "
"lookup for privilege %s: %s\n",
privilege, dbus_error.message);
dbus_error_free(&dbus_error);
return LIBLAZY_ERROR_DBUS_NOT_READY;
}
unique_name = dbus_bus_get_unique_name(dbus_connection);
error = liblazy_dbus_system_send_method_call(DBUS_HAL_SERVICE,
DBUS_HAL_COMPUTER_PATH,
DBUS_HAL_DEVICE_INTERFACE,
"IsCallerPrivileged",
&reply,
DBUS_TYPE_STRING, &privilege,
DBUS_TYPE_STRING, &unique_name,
DBUS_TYPE_INVALID);
if (error)
return error;
error = liblazy_dbus_message_get_basic_arg(reply, DBUS_TYPE_STRING,
&allowed, 0);
if (reply != NULL)
dbus_message_unref(reply);
if (error)
return error;
if (strcmp(allowed, "yes") == 0)
return 1;
return 0;
}
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