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xserver/config/hal.c

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/*
* Copyright © 2007 Daniel Stone
* Copyright © 2007 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Author: Daniel Stone <daniel@fooishbar.org>
*/
#include <dix-config.h>
#include <string.h>
#include <sys/select.h>
#include <dbus/dbus.h>
#include <hal/libhal.h>
#include "config/hotplug_priv.h"
#include "config/dbus-core.h"
#include "input.h"
#include "inputstr.h"
#include "config-backends.h"
#include "os.h"
#define LIBHAL_PROP_KEY "input.x11_options."
#define LIBHAL_XKB_PROP_KEY "input.xkb."
struct config_hal_info {
DBusConnection *system_bus;
LibHalContext *hal_ctx;
};
/* Used for special handling of xkb options. */
struct xkb_options {
char *layout;
char *model;
char *rules;
char *variant;
char *options;
};
static void
device_removed(LibHalContext * ctx, const char *udi)
{
char *value;
if (asprintf(&value, "hal:%s", udi) == -1)
return;
remove_devices("hal", value);
free(value);
}
static char *
get_prop_string(LibHalContext * hal_ctx, const char *udi, const char *name)
{
char *prop, *ret;
prop = libhal_device_get_property_string(hal_ctx, udi, name, NULL);
LogMessageVerb(X_INFO, 10, "config/hal: getting %s on %s returned %s\n",
name, udi, prop ? prop : "(null)");
if (prop) {
ret = strdup(prop);
libhal_free_string(prop);
}
else {
return NULL;
}
return ret;
}
static char *
get_prop_string_array(LibHalContext * hal_ctx, const char *udi,
const char *prop)
{
char **props, *ret, *str;
int i, len = 0;
props = libhal_device_get_property_strlist(hal_ctx, udi, prop, NULL);
if (props) {
for (i = 0; props[i]; i++)
len += strlen(props[i]);
ret = calloc(len + i, sizeof(char)); /* i - 1 commas, 1 NULL */
if (!ret) {
libhal_free_string_array(props);
return NULL;
}
str = ret;
for (i = 0; props[i]; i++) {
strcpy(str, props[i]);
str += strlen(props[i]);
*str++ = ',';
}
*(str - 1) = '\0';
libhal_free_string_array(props);
}
else {
return NULL;
}
return ret;
}
static void
device_added(LibHalContext * hal_ctx, const char *udi)
{
char *path = NULL, *driver = NULL, *name = NULL, *config_info = NULL;
char *hal_tags, *parent;
InputOption *input_options = NULL;
InputAttributes attrs = { 0 };
DeviceIntPtr dev = NULL;
DBusError error;
struct xkb_options xkb_opts = { 0 };
int rc;
LibHalPropertySet *set = NULL;
LibHalPropertySetIterator set_iter;
char *psi_key = NULL, *tmp_val;
dbus_error_init(&error);
driver = get_prop_string(hal_ctx, udi, "input.x11_driver");
if (!driver) {
/* verbose, don't tell the user unless they _want_ to see it */
LogMessageVerb(X_INFO, 7,
"config/hal: no driver specified for device %s\n", udi);
goto unwind;
}
path = get_prop_string(hal_ctx, udi, "input.device");
if (!path) {
LogMessage(X_WARNING,
"config/hal: no driver or path specified for %s\n", udi);
goto unwind;
}
attrs.device = strdup(path);
name = get_prop_string(hal_ctx, udi, "info.product");
if (!name)
name = strdup("(unnamed)");
else
attrs.product = strdup(name);
attrs.vendor = get_prop_string(hal_ctx, udi, "info.vendor");
hal_tags = get_prop_string(hal_ctx, udi, "input.tags");
attrs.tags = xstrtokenize(hal_tags, ",");
free(hal_tags);
if (libhal_device_query_capability(hal_ctx, udi, "input.keys", NULL))
attrs.flags |= ATTR_KEY | ATTR_KEYBOARD;
if (libhal_device_query_capability(hal_ctx, udi, "input.mouse", NULL))
attrs.flags |= ATTR_POINTER;
if (libhal_device_query_capability(hal_ctx, udi, "input.joystick", NULL))
attrs.flags |= ATTR_JOYSTICK;
if (libhal_device_query_capability(hal_ctx, udi, "input.tablet", NULL))
attrs.flags |= ATTR_TABLET;
if (libhal_device_query_capability(hal_ctx, udi, "input.tablet_pad", NULL))
attrs.flags |= ATTR_TABLET_PAD;
if (libhal_device_query_capability(hal_ctx, udi, "input.touchpad", NULL))
attrs.flags |= ATTR_TOUCHPAD;
if (libhal_device_query_capability(hal_ctx, udi, "input.touchscreen", NULL))
attrs.flags |= ATTR_TOUCHSCREEN;
parent = get_prop_string(hal_ctx, udi, "info.parent");
if (parent) {
int usb_vendor, usb_product;
char *old_parent;
/* construct USB ID in lowercase - "0000:ffff" */
usb_vendor = libhal_device_get_property_int(hal_ctx, parent,
"usb.vendor_id", NULL);
LogMessageVerb(X_INFO, 10,
"config/hal: getting usb.vendor_id on %s "
"returned %04x\n", parent, usb_vendor);
usb_product = libhal_device_get_property_int(hal_ctx, parent,
"usb.product_id", NULL);
LogMessageVerb(X_INFO, 10,
"config/hal: getting usb.product_id on %s "
"returned %04x\n", parent, usb_product);
if (usb_vendor && usb_product)
if (asprintf(&attrs.usb_id, "%04x:%04x", usb_vendor, usb_product)
== -1)
attrs.usb_id = NULL;
attrs.pnp_id = get_prop_string(hal_ctx, parent, "pnp.id");
old_parent = parent;
while (!attrs.pnp_id &&
(parent = get_prop_string(hal_ctx, parent, "info.parent"))) {
attrs.pnp_id = get_prop_string(hal_ctx, parent, "pnp.id");
free(old_parent);
old_parent = parent;
}
free(old_parent);
}
input_options = input_option_new(NULL, "_source", "server/hal");
if (!input_options) {
LogMessage(X_ERROR,
"config/hal: couldn't allocate first key/value pair\n");
goto unwind;
}
/* most drivers use device.. not path. evdev uses both however, but the
* path version isn't documented apparently. support both for now. */
input_options = input_option_new(input_options, "path", path);
input_options = input_option_new(input_options, "device", path);
input_options = input_option_new(input_options, "driver", driver);
input_options = input_option_new(input_options, "name", name);
if (asprintf(&config_info, "hal:%s", udi) == -1) {
config_info = NULL;
LogMessage(X_ERROR, "config/hal: couldn't allocate name\n");
goto unwind;
}
/* Check for duplicate devices */
if (device_is_duplicate(config_info)) {
LogMessage(X_WARNING,
"config/hal: device %s already added. Ignoring.\n", name);
goto unwind;
}
/* ok, grab options from hal.. iterate through all properties
* and lets see if any of them are options that we can add */
set = libhal_device_get_all_properties(hal_ctx, udi, &error);
if (!set) {
LogMessage(X_ERROR,
"config/hal: couldn't get property list for %s: %s (%s)\n",
udi, error.name, error.message);
goto unwind;
}
libhal_psi_init(&set_iter, set);
while (libhal_psi_has_more(&set_iter)) {
/* we are looking for supported keys.. extract and add to options */
psi_key = libhal_psi_get_key(&set_iter);
if (psi_key) {
/* normal options first (input.x11_options.<propname>) */
if (!strncasecmp
(psi_key, LIBHAL_PROP_KEY, sizeof(LIBHAL_PROP_KEY) - 1)) {
char *tmp;
/* only support strings for all values */
tmp_val = get_prop_string(hal_ctx, udi, psi_key);
if (tmp_val) {
/* xkb needs special handling. HAL specs include
* input.xkb.xyz options, but the x11-input.fdi specifies
* input.x11_options.Xkbxyz options. By default, we use
* the former, unless the specific X11 ones are specified.
* Since we can't predict the order in which the keys
* arrive, we need to store them.
*/
if ((tmp = strcasestr(psi_key, "xkb")) && strlen(tmp) >= 4) {
if (!strcasecmp(&tmp[3], "layout")) {
free(xkb_opts.layout);
xkb_opts.layout = strdup(tmp_val);
}
else if (!strcasecmp(&tmp[3], "model")) {
free(xkb_opts.model);
xkb_opts.model = strdup(tmp_val);
}
else if (!strcasecmp(&tmp[3], "rules")) {
free(xkb_opts.rules);
xkb_opts.rules = strdup(tmp_val);
}
else if (!strcasecmp(&tmp[3], "variant")) {
free(xkb_opts.variant);
xkb_opts.variant = strdup(tmp_val);
}
else if (!strcasecmp(&tmp[3], "options")) {
free(xkb_opts.options);
xkb_opts.options = strdup(tmp_val);
}
}
else {
/* all others */
input_options =
input_option_new(input_options,
psi_key + sizeof(LIBHAL_PROP_KEY) -
1, tmp_val);
free(tmp_val);
}
}
else {
/* server 1.4 had xkb_options as strlist. */
if ((tmp = strcasestr(psi_key, "xkb")) &&
(strlen(tmp) >= 4) &&
(!strcasecmp(&tmp[3], "options")) &&
(tmp_val =
get_prop_string_array(hal_ctx, udi, psi_key))) {
free(xkb_opts.options);
xkb_opts.options = strdup(tmp_val);
}
}
}
else if (!strncasecmp
(psi_key, LIBHAL_XKB_PROP_KEY,
sizeof(LIBHAL_XKB_PROP_KEY) - 1)) {
char *tmp;
/* only support strings for all values */
tmp_val = get_prop_string(hal_ctx, udi, psi_key);
if (tmp_val && strlen(psi_key) >= sizeof(LIBHAL_XKB_PROP_KEY)) {
tmp = &psi_key[sizeof(LIBHAL_XKB_PROP_KEY) - 1];
if (!strcasecmp(tmp, "layout")) {
if (!xkb_opts.layout)
xkb_opts.layout = strdup(tmp_val);
}
else if (!strcasecmp(tmp, "rules")) {
if (!xkb_opts.rules)
xkb_opts.rules = strdup(tmp_val);
}
else if (!strcasecmp(tmp, "variant")) {
if (!xkb_opts.variant)
xkb_opts.variant = strdup(tmp_val);
}
else if (!strcasecmp(tmp, "model")) {
if (!xkb_opts.model)
xkb_opts.model = strdup(tmp_val);
}
else if (!strcasecmp(tmp, "options")) {
if (!xkb_opts.options)
xkb_opts.options = strdup(tmp_val);
}
free(tmp_val);
}
else {
/* server 1.4 had xkb options as strlist */
tmp_val = get_prop_string_array(hal_ctx, udi, psi_key);
if (tmp_val &&
strlen(psi_key) >= sizeof(LIBHAL_XKB_PROP_KEY)) {
tmp = &psi_key[sizeof(LIBHAL_XKB_PROP_KEY) - 1];
if (!strcasecmp(tmp, ".options") && (!xkb_opts.options))
xkb_opts.options = strdup(tmp_val);
}
free(tmp_val);
}
}
}
/* psi_key doesn't need to be freed */
libhal_psi_next(&set_iter);
}
/* Now add xkb options */
if (xkb_opts.layout)
input_options =
input_option_new(input_options, "xkb_layout", xkb_opts.layout);
if (xkb_opts.rules)
input_options =
input_option_new(input_options, "xkb_rules", xkb_opts.rules);
if (xkb_opts.variant)
input_options =
input_option_new(input_options, "xkb_variant", xkb_opts.variant);
if (xkb_opts.model)
input_options =
input_option_new(input_options, "xkb_model", xkb_opts.model);
if (xkb_opts.options)
input_options =
input_option_new(input_options, "xkb_options", xkb_opts.options);
input_options = input_option_new(input_options, "config_info", config_info);
/* this isn't an error, but how else do you output something that the user can see? */
LogMessage(X_INFO, "config/hal: Adding input device %s\n", name);
if ((rc = NewInputDeviceRequest(input_options, &attrs, &dev)) != Success) {
LogMessage(X_ERROR, "config/hal: NewInputDeviceRequest failed (%d)\n",
rc);
dev = NULL;
goto unwind;
}
unwind:
if (set)
libhal_free_property_set(set);
free(path);
free(driver);
free(name);
free(config_info);
input_option_free_list(&input_options);
free(attrs.product);
free(attrs.vendor);
free(attrs.device);
free(attrs.pnp_id);
free(attrs.usb_id);
if (attrs.tags) {
char **tag = attrs.tags;
while (*tag) {
free(*tag);
tag++;
}
free(attrs.tags);
}
free(xkb_opts.layout);
free(xkb_opts.rules);
free(xkb_opts.model);
free(xkb_opts.variant);
free(xkb_opts.options);
dbus_error_free(&error);
return;
}
static void
disconnect_hook(void *data)
{
DBusError error;
struct config_hal_info *info = data;
if (info->hal_ctx) {
if (dbus_connection_get_is_connected(info->system_bus)) {
dbus_error_init(&error);
if (!libhal_ctx_shutdown(info->hal_ctx, &error))
LogMessage(X_WARNING,
"config/hal: disconnect_hook couldn't shut down context: %s (%s)\n",
error.name, error.message);
dbus_error_free(&error);
}
libhal_ctx_free(info->hal_ctx);
}
info->hal_ctx = NULL;
info->system_bus = NULL;
}
static BOOL
connect_and_register(DBusConnection * connection, struct config_hal_info *info)
{
DBusError error;
char **devices;
int num_devices, i;
if (info->hal_ctx)
return TRUE; /* already registered, pretend we did something */
info->system_bus = connection;
dbus_error_init(&error);
info->hal_ctx = libhal_ctx_new();
if (!info->hal_ctx) {
LogMessage(X_ERROR, "config/hal: couldn't create HAL context\n");
goto out_err;
}
if (!libhal_ctx_set_dbus_connection(info->hal_ctx, info->system_bus)) {
LogMessage(X_ERROR,
"config/hal: couldn't associate HAL context with bus\n");
goto out_err;
}
if (!libhal_ctx_init(info->hal_ctx, &error)) {
LogMessage(X_ERROR,
"config/hal: couldn't initialise context: %s (%s)\n",
error.name ? error.name : "unknown error",
error.message ? error.message : "null");
goto out_err;
}
if (!libhal_device_property_watch_all(info->hal_ctx, &error)) {
LogMessage(X_ERROR,
"config/hal: couldn't watch all properties: %s (%s)\n",
error.name ? error.name : "unknown error",
error.message ? error.message : "null");
goto out_ctx;
}
libhal_ctx_set_device_added(info->hal_ctx, device_added);
libhal_ctx_set_device_removed(info->hal_ctx, device_removed);
devices = libhal_find_device_by_capability(info->hal_ctx, "input",
&num_devices, &error);
/* FIXME: Get default devices if error is set. */
if (dbus_error_is_set(&error)) {
LogMessage(X_ERROR, "config/hal: couldn't find input device: %s (%s)\n",
error.name ? error.name : "unknown error",
error.message ? error.message : "null");
goto out_ctx;
}
for (i = 0; i < num_devices; i++)
device_added(info->hal_ctx, devices[i]);
libhal_free_string_array(devices);
dbus_error_free(&error);
return TRUE;
out_ctx:
dbus_error_free(&error);
if (!libhal_ctx_shutdown(info->hal_ctx, &error)) {
LogMessage(X_WARNING,
"config/hal: couldn't shut down context: %s (%s)\n",
error.name ? error.name : "unknown error",
error.message ? error.message : "null");
dbus_error_free(&error);
}
out_err:
dbus_error_free(&error);
if (info->hal_ctx) {
libhal_ctx_free(info->hal_ctx);
}
info->hal_ctx = NULL;
info->system_bus = NULL;
return FALSE;
}
/**
* Handle NewOwnerChanged signals to deal with HAL startup at X server runtime.
*
* NewOwnerChanged is send once when HAL shuts down, and once again when it
* comes back up. Message has three arguments, first is the name
* (org.freedesktop.Hal), the second one is the old owner, third one is new
* owner.
*/
static DBusHandlerResult
ownerchanged_handler(DBusConnection * connection, DBusMessage * message,
void *data)
{
int ret = DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
if (dbus_message_is_signal(message,
"org.freedesktop.DBus", "NameOwnerChanged")) {
DBusError error;
char *name, *old_owner, *new_owner;
dbus_error_init(&error);
dbus_message_get_args(message, &error,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_STRING, &old_owner,
DBUS_TYPE_STRING, &new_owner, DBUS_TYPE_INVALID);
if (dbus_error_is_set(&error)) {
ErrorF
("[config/hal] failed to get NameOwnerChanged args: %s (%s)\n",
error.name, error.message);
}
else if (name && strcmp(name, "org.freedesktop.Hal") == 0) {
if (!old_owner || !strlen(old_owner)) {
DebugF("[config/hal] HAL startup detected.\n");
if (connect_and_register
(connection, (struct config_hal_info *) data))
dbus_connection_unregister_object_path(connection,
"/org/freedesktop/DBus");
else
ErrorF("[config/hal] Failed to connect to HAL bus.\n");
}
ret = DBUS_HANDLER_RESULT_HANDLED;
}
dbus_error_free(&error);
}
return ret;
}
/**
* Register a handler for the NameOwnerChanged signal.
*/
static BOOL
listen_for_startup(DBusConnection * connection, void *data)
{
DBusObjectPathVTable vtable = {.message_function = ownerchanged_handler, };
DBusError error;
const char MATCH_RULE[] = "sender='org.freedesktop.DBus',"
"interface='org.freedesktop.DBus',"
"type='signal',"
"path='/org/freedesktop/DBus'," "member='NameOwnerChanged'";
int rc = FALSE;
dbus_error_init(&error);
dbus_bus_add_match(connection, MATCH_RULE, &error);
if (!dbus_error_is_set(&error)) {
if (dbus_connection_register_object_path(connection,
"/org/freedesktop/DBus",
&vtable, data))
rc = TRUE;
else
ErrorF("[config/hal] cannot register object path.\n");
}
else {
ErrorF("[config/hal] couldn't add match rule: %s (%s)\n", error.name,
error.message);
ErrorF("[config/hal] cannot detect a HAL startup.\n");
}
dbus_error_free(&error);
return rc;
}
static void
connect_hook(DBusConnection * connection, void *data)
{
struct config_hal_info *info = data;
if (listen_for_startup(connection, data) &&
connect_and_register(connection, info))
dbus_connection_unregister_object_path(connection,
"/org/freedesktop/DBus");
return;
}
static struct config_hal_info hal_info;
static struct dbus_core_hook hook = {
.connect = connect_hook,
.disconnect = disconnect_hook,
.data = &hal_info,
};
int
config_hal_init(void)
{
memset(&hal_info, 0, sizeof(hal_info));
hal_info.system_bus = NULL;
hal_info.hal_ctx = NULL;
if (!dbus_core_add_hook(&hook)) {
LogMessage(X_ERROR, "config/hal: failed to add D-Bus hook\n");
return 0;
}
/* verbose message */
LogMessageVerb(X_INFO, 7, "config/hal: initialized\n");
return 1;
}
void
config_hal_fini(void)
{
dbus_core_remove_hook(&hook);
}
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