Add helpers for task handling

2 files changed, 180 insertions, 0 deletions

diff --git a/plugins/task.c b/plugins/task.c
new file mode 100644
index 00000000..dae54c75
--- /dev/null
+++ b/plugins/task.c
@@ -0,0 +1,145 @@
+/*
+ *
+ *  Connection Manager
+ *
+ *  Copyright (C) 2007-2008  Intel Corporation. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <unistd.h>
+#include <sys/wait.h>
+
+#include <glib.h>
+
+#include <connman/log.h>
+
+#include "task.h"
+
+struct task_data {
+	pid_t pid;
+	int index;
+	task_cb_t callback;
+	void *user_data;
+};
+
+static GSList *task_list = NULL;
+
+struct task_data *task_find_by_pid(pid_t pid)
+{
+	GSList *list;
+
+	for (list = task_list; list; list = list->next) {
+		struct task_data *task = list->data;
+
+		if (task->pid == pid)
+			return task;
+	}
+
+	return NULL;
+}
+
+struct task_data *task_find_by_index(int index)
+{
+	GSList *list;
+
+	for (list = task_list; list; list = list->next) {
+		struct task_data *task = list->data;
+
+		if (task->index == index)
+			return task;
+	}
+
+	return NULL;
+}
+
+static void task_died(GPid pid, gint status, gpointer user_data)
+{
+	struct task_data *task = user_data;
+
+	if (WIFEXITED(status))
+		DBG("task %p exit status %d", task, WEXITSTATUS(status));
+	else
+		DBG("task %p signal %d", task, WTERMSIG(status));
+
+	g_spawn_close_pid(pid);
+	task->pid = 0;
+
+	task_list = g_slist_remove(task_list, task);
+
+	if (task->callback)
+		task->callback(task->index, task->user_data);
+
+	g_free(task);
+}
+
+static void task_setup(gpointer user_data)
+{
+	struct task_data *task = user_data;
+
+	DBG("task %p", task);
+}
+
+struct task_data *task_spawn(int index, char **argv, char **envp,
+					task_cb_t callback, void *user_data)
+{
+	GSpawnFlags flags = G_SPAWN_DO_NOT_REAP_CHILD |
+						G_SPAWN_STDOUT_TO_DEV_NULL;
+	struct task_data *task;
+
+	DBG("index %d", index);
+
+	task = g_try_new0(struct task_data, 1);
+	if (task == NULL)
+		return NULL;
+
+	task->index = index;
+
+	task->callback  = callback;
+	task->user_data = user_data;
+
+	if (g_spawn_async(NULL, argv, envp, flags,
+				task_setup, task, &task->pid, NULL) == FALSE) {
+		connman_error("Failed to spawn task");
+		return NULL;
+	}
+
+	task_list = g_slist_append(task_list, task);
+
+	g_child_watch_add(task->pid, task_died, task);
+
+	DBG("task %p pid %d", task, task->pid);
+
+	return task;
+}
+
+int task_kill(struct task_data *task)
+{
+	DBG("task %p", task);
+
+	if (task->pid > 0)
+		kill(task->pid, SIGTERM);
+
+	return 0;
+}
+
+void *task_get_data(struct task_data *task)
+{
+	return task->user_data;
+}
diff --git a/plugins/task.h b/plugins/task.h
new file mode 100644
index 00000000..0234d47a
--- /dev/null
+++ b/plugins/task.h
@@ -0,0 +1,35 @@
+/*
+ *
+ *  Connection Manager
+ *
+ *  Copyright (C) 2007-2008  Intel Corporation. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#include <sys/types.h>
+
+struct task_data;
+
+typedef void (* task_cb_t) (int index, void *user_data);
+
+struct task_data *task_find_by_pid(pid_t pid);
+struct task_data *task_find_by_index(int index);
+
+struct task_data *task_spawn(int index, char **argv, char **envp,
+					task_cb_t callback, void *user_data);
+int task_kill(struct task_data *task);
+
+void *task_get_data(struct task_data *task);