/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
*
* Copyright (C) 2007 William Jon McCann <mccann@jhu.edu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
#include <string.h>
#include <glib.h>
#include <glib/gi18n.h>
#include <glib/gstdio.h>
#include <glib-object.h>
#include "ck-file-monitor.h"
#include "ck-tty-idle-monitor.h"
#define CK_TTY_IDLE_MONITOR_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), CK_TYPE_TTY_IDLE_MONITOR, CkTtyIdleMonitorPrivate))
#define DEFAULT_THRESHOLD_SECONDS 30
struct CkTtyIdleMonitorPrivate
{
char *device;
guint threshold;
guint timeout_id;
gboolean idle_hint;
GTimeVal idle_since_hint;
CkFileMonitor *file_monitor;
guint file_notify_id;
};
enum {
IDLE_HINT_CHANGED,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_DEVICE,
PROP_THRESHOLD,
};
static guint signals [LAST_SIGNAL] = { 0, };
static void ck_tty_idle_monitor_class_init (CkTtyIdleMonitorClass *klass);
static void ck_tty_idle_monitor_init (CkTtyIdleMonitor *tty_idle_monitor);
static void ck_tty_idle_monitor_finalize (GObject *object);
static void schedule_tty_check (CkTtyIdleMonitor *monitor,
guint seconds);
G_DEFINE_TYPE (CkTtyIdleMonitor, ck_tty_idle_monitor, G_TYPE_OBJECT)
GQuark
ck_tty_idle_monitor_error_quark (void)
{
static GQuark ret = 0;
if (ret == 0) {
ret = g_quark_from_static_string ("ck_tty_idle_monitor_error");
}
return ret;
}
static gboolean
tty_idle_monitor_set_idle_hint_internal (CkTtyIdleMonitor *tty_idle_monitor,
gboolean idle_hint)
{
if (tty_idle_monitor->priv->idle_hint != idle_hint) {
tty_idle_monitor->priv->idle_hint = idle_hint;
g_debug ("Emitting idle-changed for tty_idle_monitor %s: %d", tty_idle_monitor->priv->device, idle_hint);
g_signal_emit (tty_idle_monitor, signals [IDLE_HINT_CHANGED], 0, idle_hint);
return TRUE;
}
return FALSE;
}
static void
ck_tty_idle_monitor_set_device (CkTtyIdleMonitor *monitor,
const char *device)
{
g_return_if_fail (CK_IS_TTY_IDLE_MONITOR (monitor));
g_free (monitor->priv->device);
monitor->priv->device = g_strdup (device);
}
void
ck_tty_idle_monitor_set_threshold (CkTtyIdleMonitor *monitor,
guint threshold)
{
g_return_if_fail (CK_IS_TTY_IDLE_MONITOR (monitor));
monitor->priv->threshold = threshold;
}
static void
ck_tty_idle_monitor_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
CkTtyIdleMonitor *self;
self = CK_TTY_IDLE_MONITOR (object);
switch (prop_id) {
case PROP_DEVICE:
ck_tty_idle_monitor_set_device (self, g_value_get_string (value));
break;
case PROP_THRESHOLD:
ck_tty_idle_monitor_set_threshold (self, g_value_get_uint (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
ck_tty_idle_monitor_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
CkTtyIdleMonitor *self;
self = CK_TTY_IDLE_MONITOR (object);
switch (prop_id) {
case PROP_DEVICE:
g_value_set_string (value, self->priv->device);
break;
case PROP_THRESHOLD:
g_value_set_uint (value, self->priv->threshold);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
remove_idle_hint_timeout (CkTtyIdleMonitor *tty_idle_monitor)
{
if (tty_idle_monitor->priv->timeout_id > 0) {
g_source_remove (tty_idle_monitor->priv->timeout_id);
}
}
static void
file_access_cb (CkFileMonitor *file_monitor,
CkFileMonitorEvent event,
const char *path,
CkTtyIdleMonitor *monitor)
{
g_debug ("File access callback for %s", path);
tty_idle_monitor_set_idle_hint_internal (monitor, FALSE);
/* this resets timers */
ck_tty_idle_monitor_start (monitor);
}
static gboolean
monitor_add_watch (CkTtyIdleMonitor *monitor)
{
if (monitor->priv->file_monitor == NULL) {
monitor->priv->file_monitor = ck_file_monitor_new ();
}
monitor->priv->file_notify_id = ck_file_monitor_add_notify (monitor->priv->file_monitor,
monitor->priv->device,
CK_FILE_MONITOR_EVENT_ACCESS,
(CkFileMonitorNotifyFunc)file_access_cb,
monitor);
return monitor->priv->file_notify_id > 0;
}
static gboolean
monitor_remove_watch (CkTtyIdleMonitor *monitor)
{
if (monitor->priv->file_monitor != NULL &&
monitor->priv->file_notify_id > 0) {
g_debug ("Removing notify");
ck_file_monitor_remove_notify (monitor->priv->file_monitor,
monitor->priv->file_notify_id);
}
return FALSE;
}
static gboolean
check_tty_idle (CkTtyIdleMonitor *monitor)
{
struct stat sb;
gboolean is_idle;
gboolean changed;
time_t now;
time_t idletime;
time_t last_access;
if (monitor->priv->device == NULL) {
return FALSE;
}
if (g_stat (monitor->priv->device, &sb) < 0) {
g_debug ("Unable to stat: %s: %s", monitor->priv->device, g_strerror (errno));
return FALSE;
}
last_access = sb.st_atime;
time (&now);
if (last_access > now) {
last_access = now;
}
idletime = now - last_access;
is_idle = (idletime >= monitor->priv->threshold);
changed = tty_idle_monitor_set_idle_hint_internal (monitor, is_idle);
monitor->priv->timeout_id = 0;
if (is_idle) {
if (! monitor_add_watch (monitor)) {
/* if we can't add a watch just add a new timer */
g_debug ("Couldn't add watch: rescheduling check for %u sec", monitor->priv->threshold);
schedule_tty_check (monitor, monitor->priv->threshold);
}
} else {
guint remaining;
remaining = monitor->priv->threshold - idletime;
if (remaining > 0) {
g_debug ("Time left, rescheduling check for %u sec", remaining);
/* reschedule for time left */
schedule_tty_check (monitor, remaining);
} else {
g_debug ("restarting check for %u sec", monitor->priv->threshold);
schedule_tty_check (monitor, monitor->priv->threshold);
}
}
return FALSE;
}
static void
schedule_tty_check (CkTtyIdleMonitor *monitor,
guint seconds)
{
if (monitor->priv->timeout_id == 0) {
#if GLIB_CHECK_VERSION(2,14,0)
monitor->priv->timeout_id = g_timeout_add_seconds (seconds,
(GSourceFunc)check_tty_idle,
monitor);
#else
monitor->priv->timeout_id = g_timeout_add (seconds * 1000,
(GSourceFunc)check_tty_idle,
monitor);
#endif
}
}
static void
add_idle_hint_timeout (CkTtyIdleMonitor *monitor)
{
schedule_tty_check (monitor, monitor->priv->threshold);
}
void
ck_tty_idle_monitor_stop (CkTtyIdleMonitor *monitor)
{
remove_idle_hint_timeout (monitor);
monitor_remove_watch (monitor);
}
void
ck_tty_idle_monitor_start (CkTtyIdleMonitor *monitor)
{
ck_tty_idle_monitor_stop (monitor);
add_idle_hint_timeout (monitor);
}
static void
ck_tty_idle_monitor_class_init (CkTtyIdleMonitorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->get_property = ck_tty_idle_monitor_get_property;
object_class->set_property = ck_tty_idle_monitor_set_property;
object_class->finalize = ck_tty_idle_monitor_finalize;
signals [IDLE_HINT_CHANGED] =
g_signal_new ("idle-hint-changed",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (CkTtyIdleMonitorClass, idle_hint_changed),
NULL,
NULL,
g_cclosure_marshal_VOID__BOOLEAN,
G_TYPE_NONE,
1, G_TYPE_BOOLEAN);
g_object_class_install_property (object_class,
PROP_DEVICE,
g_param_spec_string ("device",
"device",
"device",
NULL,
G_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_THRESHOLD,
g_param_spec_uint ("threshold",
"Threshold",
"Threshold",
0,
G_MAXINT,
DEFAULT_THRESHOLD_SECONDS,
G_PARAM_READWRITE));
g_type_class_add_private (klass, sizeof (CkTtyIdleMonitorPrivate));
}
static void
ck_tty_idle_monitor_init (CkTtyIdleMonitor *monitor)
{
monitor->priv = CK_TTY_IDLE_MONITOR_GET_PRIVATE (monitor);
monitor->priv->threshold = DEFAULT_THRESHOLD_SECONDS;
}
static void
ck_tty_idle_monitor_finalize (GObject *object)
{
CkTtyIdleMonitor *monitor;
g_return_if_fail (object != NULL);
g_return_if_fail (CK_IS_TTY_IDLE_MONITOR (object));
monitor = CK_TTY_IDLE_MONITOR (object);
g_return_if_fail (monitor->priv != NULL);
ck_tty_idle_monitor_stop (monitor);
g_free (monitor->priv->device);
G_OBJECT_CLASS (ck_tty_idle_monitor_parent_class)->finalize (object);
}
CkTtyIdleMonitor *
ck_tty_idle_monitor_new (const char *device)
{
GObject *object;
object = g_object_new (CK_TYPE_TTY_IDLE_MONITOR,
"device", device,
NULL);
return CK_TTY_IDLE_MONITOR (object);
}
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