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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
* vi:set noexpandtab tabstop=8 shiftwidth=8:
*
* Copyright (C) 2016 Richard Hughes <richard@hughsie.com>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <config.h>
#include <fnmatch.h>
#include <gudev/gudev.h>
#include <gnome-software.h>
#include "gs-plugin-modalias.h"
/**
* SECTION:
* Plugin to set a default icon and basic properties for apps which provide
* support for hardware devices which are attached to this system.
*
* This plugin uses udev to detect attached hardware, and matches it to apps
* which claim to provide support for that modalias in their metainfo.
*
* It does simple listing and matching, so runs entirely in the main thread and
* doesn’t require any locking.
*/
struct _GsPluginModalias {
GsPlugin parent;
GUdevClient *client;
GPtrArray *devices;
};
G_DEFINE_TYPE (GsPluginModalias, gs_plugin_modalias, GS_TYPE_PLUGIN)
static void
gs_plugin_modalias_uevent_cb (GUdevClient *client,
const gchar *action,
GUdevDevice *device,
gpointer user_data)
{
GsPluginModalias *self = GS_PLUGIN_MODALIAS (user_data);
if (g_strcmp0 (action, "add") == 0 ||
g_strcmp0 (action, "remove") == 0) {
g_debug ("invalidating devices as '%s' sent action '%s'",
g_udev_device_get_sysfs_path (device),
action);
g_ptr_array_set_size (self->devices, 0);
}
}
static void
gs_plugin_modalias_init (GsPluginModalias *self)
{
GsPlugin *plugin = GS_PLUGIN (self);
gs_plugin_add_rule (plugin, GS_PLUGIN_RULE_RUN_AFTER, "appstream");
gs_plugin_add_rule (plugin, GS_PLUGIN_RULE_RUN_BEFORE, "icons");
self->devices = g_ptr_array_new_with_free_func ((GDestroyNotify) g_object_unref);
self->client = g_udev_client_new (NULL);
g_signal_connect (self->client, "uevent",
G_CALLBACK (gs_plugin_modalias_uevent_cb), self);
}
static void
gs_plugin_modalias_dispose (GObject *object)
{
GsPluginModalias *self = GS_PLUGIN_MODALIAS (object);
g_clear_object (&self->client);
g_clear_pointer (&self->devices, g_ptr_array_unref);
G_OBJECT_CLASS (gs_plugin_modalias_parent_class)->dispose (object);
}
static void
gs_plugin_modalias_ensure_devices (GsPluginModalias *self)
{
g_autoptr(GList) list = NULL;
/* already set */
if (self->devices->len > 0)
return;
/* get the devices, and assume ownership of each */
list = g_udev_client_query_by_subsystem (self->client, NULL);
for (GList *l = list; l != NULL; l = l->next) {
GUdevDevice *device = G_UDEV_DEVICE (l->data);
if (g_udev_device_get_sysfs_attr (device, "modalias") == NULL) {
g_object_unref (device);
continue;
}
g_ptr_array_add (self->devices, device);
}
g_debug ("%u devices with modalias", self->devices->len);
}
static gboolean
gs_plugin_modalias_matches (GsPluginModalias *self,
const gchar *modalias)
{
gs_plugin_modalias_ensure_devices (self);
for (guint i = 0; i < self->devices->len; i++) {
GUdevDevice *device = g_ptr_array_index (self->devices, i);
const gchar *modalias_tmp;
/* get the (optional) device modalias */
modalias_tmp = g_udev_device_get_sysfs_attr (device, "modalias");
if (modalias_tmp == NULL)
continue;
if (fnmatch (modalias, modalias_tmp, 0) == 0) {
g_debug ("matched %s against %s", modalias_tmp, modalias);
return TRUE;
}
}
return FALSE;
}
static gboolean
refine_app (GsPluginModalias *self,
GsApp *app,
GsPluginRefineRequireFlags require_flags,
GCancellable *cancellable,
GError **error)
{
GPtrArray *provided;
guint i;
/* not required */
if (gs_app_has_icons (app))
return TRUE;
if (gs_app_get_kind (app) != AS_COMPONENT_KIND_DRIVER)
return TRUE;
/* do any of the modaliases match any installed hardware */
provided = gs_app_get_provided (app);
for (i = 0 ; i < provided->len; i++) {
GPtrArray *items;
AsProvided *prov = g_ptr_array_index (provided, i);
if (as_provided_get_kind (prov) != AS_PROVIDED_KIND_MODALIAS)
continue;
items = as_provided_get_items (prov);
for (guint j = 0; j < items->len; j++) {
if (gs_plugin_modalias_matches (self, (const gchar*) g_ptr_array_index (items, j))) {
g_autoptr(GIcon) ic = NULL;
ic = g_themed_icon_new ("emblem-system-symbolic");
gs_app_add_icon (app, ic);
gs_app_add_quirk (app, GS_APP_QUIRK_NOT_LAUNCHABLE);
break;
}
}
}
return TRUE;
}
static void
gs_plugin_modalias_refine_async (GsPlugin *plugin,
GsAppList *list,
GsPluginRefineFlags job_flags,
GsPluginRefineRequireFlags require_flags,
GsPluginEventCallback event_callback,
void *event_user_data,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GsPluginModalias *self = GS_PLUGIN_MODALIAS (plugin);
g_autoptr(GTask) task = NULL;
g_autoptr(GError) local_error = NULL;
task = g_task_new (plugin, cancellable, callback, user_data);
g_task_set_source_tag (task, gs_plugin_modalias_refine_async);
for (guint i = 0; i < gs_app_list_length (list); i++) {
GsApp *app = gs_app_list_index (list, i);
if (!refine_app (self, app, require_flags, cancellable, &local_error)) {
g_task_return_error (task, g_steal_pointer (&local_error));
return;
}
}
g_task_return_boolean (task, TRUE);
}
static gboolean
gs_plugin_modalias_refine_finish (GsPlugin *plugin,
GAsyncResult *result,
GError **error)
{
return g_task_propagate_boolean (G_TASK (result), error);
}
static void
gs_plugin_modalias_class_init (GsPluginModaliasClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GsPluginClass *plugin_class = GS_PLUGIN_CLASS (klass);
object_class->dispose = gs_plugin_modalias_dispose;
plugin_class->refine_async = gs_plugin_modalias_refine_async;
plugin_class->refine_finish = gs_plugin_modalias_refine_finish;
}
GType
gs_plugin_query_type (void)
{
return GS_TYPE_PLUGIN_MODALIAS;
}
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