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/* WirePlumber
*
* Copyright © 2021 Collabora Ltd.
* @author George Kiagiadakis <george.kiagiadakis@collabora.com>
*
* SPDX-License-Identifier: MIT
*/
#include <wp/wp.h>
#include <glib-unix.h>
#include <systemd/sd-login.h>
#include <spa/utils/result.h>
#include <spa/utils/string.h>
WP_DEFINE_LOCAL_LOG_TOPIC ("m-logind")
#define NAME "logind"
struct _WpLogind
{
WpPlugin parent;
sd_login_monitor *monitor;
GSource *source;
char *state;
};
enum {
ACTION_GET_STATE,
SIGNAL_STATE_CHANGED,
N_SIGNALS
};
static guint signals[N_SIGNALS] = {0};
G_DECLARE_FINAL_TYPE (WpLogind, wp_logind, WP, LOGIND, WpPlugin)
G_DEFINE_TYPE (WpLogind, wp_logind, WP_TYPE_PLUGIN)
static void
wp_logind_init (WpLogind * self)
{
}
static gchar *
wp_logind_get_state (WpLogind *self)
{
return g_strdup (self->state);
}
static int
wp_logind_get_user_state (uid_t uid, char **state)
{
int res;
if ((res = sd_uid_get_state (uid, state)) >= 0) {
if (g_strcmp0 (*state, "active") == 0 &&
sd_uid_get_seats (uid, 1, NULL) == 0) {
free (*state);
*state = strdup ("online");
}
}
return res;
}
static gboolean
wp_logind_source_ready (gint fd, GIOCondition condition, gpointer user_data)
{
WpLogind *self = WP_LOGIND (user_data);
sd_login_monitor_flush (self->monitor);
{
char *state = NULL;
if (wp_logind_get_user_state (getuid(), &state) >= 0) {
if (g_strcmp0 (state, self->state) != 0) {
char *tmp = state;
state = self->state;
self->state = tmp;
g_signal_emit (self, signals[SIGNAL_STATE_CHANGED], 0, self->state);
}
free (state);
}
}
return G_SOURCE_CONTINUE;
}
static void
wp_logind_enable (WpPlugin * plugin, WpTransition * transition)
{
WpLogind *self = WP_LOGIND (plugin);
int res = 0;
if ((res = sd_login_monitor_new ("uid", &self->monitor)) < 0) {
wp_transition_return_error (transition, g_error_new (G_IO_ERROR,
g_io_error_from_errno (-res),
"failed to start systemd logind monitor: %d (%s)",
res, spa_strerror(res)));
return;
}
if ((res = wp_logind_get_user_state (getuid(), &self->state)) < 0) {
wp_transition_return_error (transition, g_error_new (G_IO_ERROR,
g_io_error_from_errno (-res),
"failed to get systemd login state: %d (%s)",
res, spa_strerror(res)));
g_clear_pointer (&self->monitor, sd_login_monitor_unref);
return;
}
self->source = g_unix_fd_source_new (
sd_login_monitor_get_fd (self->monitor),
sd_login_monitor_get_events (self->monitor));
g_source_set_callback (self->source, G_SOURCE_FUNC (wp_logind_source_ready),
self, NULL);
g_autoptr (WpCore) core = wp_object_get_core (WP_OBJECT (plugin));
GMainContext *context = wp_core_get_g_main_context (core);
g_source_attach (self->source, context);
wp_object_update_features (WP_OBJECT (self), WP_PLUGIN_FEATURE_ENABLED, 0);
}
static void
wp_logind_disable (WpPlugin * plugin)
{
WpLogind *self = WP_LOGIND (plugin);
g_clear_pointer (&self->state, free);
g_source_destroy (self->source);
g_clear_pointer (&self->source, g_source_unref);
g_clear_pointer (&self->monitor, sd_login_monitor_unref);
}
static void
wp_logind_class_init (WpLogindClass * klass)
{
WpPluginClass *plugin_class = (WpPluginClass *) klass;
plugin_class->enable = wp_logind_enable;
plugin_class->disable = wp_logind_disable;
signals[ACTION_GET_STATE] = g_signal_new_class_handler (
"get-state", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
(GCallback) wp_logind_get_state,
NULL, NULL, NULL, G_TYPE_STRING, 0);
signals[SIGNAL_STATE_CHANGED] = g_signal_new (
"state-changed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 1, G_TYPE_STRING);
}
WP_PLUGIN_EXPORT GObject *
wireplumber__module_init (WpCore * core, WpSpaJson * args, GError ** error)
{
return G_OBJECT (g_object_new (wp_logind_get_type (),
"name", NAME,
"core", core,
NULL));
}
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