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/*
* Copyright (C) 2021 Collabora Ltd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "app_launcher.h"
#include "process_manager.h"
struct _ProcessManager {
GObject parent_instance;
GList *process_data;
};
G_DEFINE_TYPE(ProcessManager, process_manager, G_TYPE_OBJECT);
enum {
STARTED,
TERMINATED,
N_SIGNALS
};
static guint signals[N_SIGNALS];
/*
* Application info structure, used for storing relevant data
* in the `running_apps` list
*/
struct process_runtime_data {
guint watcher;
GPid pid;
const gchar *app_id;
};
/*
* Initialization & cleanup functions
*/
static void process_manager_dispose(GObject *object)
{
ProcessManager *self = APPLAUNCHD_PROCESS_MANAGER(object);
g_return_if_fail(APPLAUNCHD_IS_PROCESS_MANAGER(self));
if (self->process_data)
g_list_free_full(g_steal_pointer(&self->process_data), g_free);
G_OBJECT_CLASS(process_manager_parent_class)->dispose(object);
}
static void process_manager_finalize(GObject *object)
{
G_OBJECT_CLASS(process_manager_parent_class)->finalize(object);
}
static void process_manager_class_init(ProcessManagerClass *klass)
{
GObjectClass *object_class = (GObjectClass *)klass;
object_class->dispose = process_manager_dispose;
object_class->finalize = process_manager_finalize;
signals[STARTED] = g_signal_new("started", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0 ,
NULL, NULL, NULL, G_TYPE_NONE,
1, G_TYPE_STRING);
signals[TERMINATED] = g_signal_new("terminated", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0 ,
NULL, NULL, NULL, G_TYPE_NONE,
1, G_TYPE_STRING);
}
static void process_manager_init(ProcessManager *self)
{
}
/*
* Internal functions
*/
static const gchar *get_app_id_for_pid(ProcessManager *self, GPid pid)
{
g_return_val_if_fail(APPLAUNCHD_IS_PROCESS_MANAGER(self), NULL);
AppLauncher *app_launcher = app_launcher_get_default();
guint len = g_list_length(self->process_data);
for (guint i = 0; i < len; i++) {
struct process_runtime_data *runtime_data =
g_list_nth_data(self->process_data, i);
if (runtime_data->pid == pid)
return runtime_data->app_id;
}
return NULL;
}
/*
* Internal callbacks
*/
/*
* This function is called when a watched process terminated, so we can:
* - cleanup this application's data (and reap the process so it
* doesn't become a zombie)
* - notify listeners that the process terminated
*/
static void process_manager_app_terminated_cb(GPid pid,
gint wait_status,
gpointer data)
{
ProcessManager *self = data;
AppLauncher *app_launcher = app_launcher_get_default();
struct process_runtime_data *runtime_data;
const gchar *app_id;
AppInfo *app_info;
g_return_if_fail(APPLAUNCHD_IS_PROCESS_MANAGER(self));
app_id = get_app_id_for_pid(self, pid);
if (!app_id) {
g_warning("Unable to retrieve app id for pid %d", pid);
return;
}
app_info = app_launcher_get_app_info(app_launcher, app_id);
if (!app_info) {
g_warning("Unable to find running app with pid %d", pid);
return;
}
if (g_spawn_check_exit_status(wait_status, NULL))
g_debug("Application '%s' terminated with exit code %i",
app_id, WEXITSTATUS(wait_status));
else
g_warning("Application '%s' crashed", app_id);
g_spawn_close_pid(pid);
runtime_data = app_info_get_runtime_data(app_info);
g_source_remove(runtime_data->watcher);
app_info_set_status(app_info, APP_STATUS_INACTIVE);
app_info_set_runtime_data(app_info, NULL);
self->process_data = g_list_remove(self->process_data, runtime_data);
g_free(runtime_data);
g_signal_emit(self, signals[TERMINATED], 0, app_id);
}
/*
* Public functions
*/
ProcessManager *process_manager_new(void)
{
return g_object_new(APPLAUNCHD_TYPE_PROCESS_MANAGER, NULL);
}
/*
* Start an application by executing the provided command line.
*/
gboolean process_manager_start_app(ProcessManager *self,
AppInfo *app_info)
{
g_return_val_if_fail(APPLAUNCHD_IS_PROCESS_MANAGER(self), FALSE);
g_return_val_if_fail(APPLAUNCHD_IS_APP_INFO(app_info), FALSE);
gboolean success;
g_autofree GStrv args = NULL;
const gchar *app_id = app_info_get_app_id(app_info);
const gchar *command = app_info_get_command(app_info);
struct process_runtime_data *runtime_data;
runtime_data = g_new0(struct process_runtime_data, 1);
if (!runtime_data) {
g_critical("Unable to allocate runtime data structure for '%s'",
app_id);
return FALSE;
}
runtime_data->app_id = app_id;
args = g_strsplit(command, " ", -1);
success = g_spawn_async(NULL, args, NULL,
G_SPAWN_DO_NOT_REAP_CHILD | G_SPAWN_SEARCH_PATH,
NULL, NULL, &runtime_data->pid, NULL);
if (!success) {
g_critical("Unable to start application '%s'", app_id);
g_free(runtime_data);
return FALSE;
}
/*
* Add a watcher for the child PID in order to get notified when it dies
*/
runtime_data->watcher = g_child_watch_add(runtime_data->pid,
process_manager_app_terminated_cb,
self);
self->process_data = g_list_append(self->process_data, runtime_data);
app_info_set_runtime_data(app_info, runtime_data);
g_signal_emit(self, signals[STARTED], 0, app_id);
return TRUE;
}
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