gio/glocaldirectorymonitor.c

   1 /* GIO - GLib Input, Output and Streaming Library
   2  *
   3  * Copyright (C) 2006-2007 Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General
  16  * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * Author: Alexander Larsson <alexl@redhat.com>
  19  */
  20
  21 #include "config.h"
  22
  23 #include "glocaldirectorymonitor.h"
  24 #include "gunixmounts.h"
  25 #include "giomodule-priv.h"
  26 #include "gfile.h"
  27 #include "gioerror.h"
  28 #include "glibintl.h"
  29
  30 #include <string.h>
  31
  32
  33 enum
  34 {
  35   PROP_0,
  36   PROP_DIRNAME,
  37   PROP_FLAGS
  38 };
  39
  40 static gboolean g_local_directory_monitor_cancel (GFileMonitor      *monitor);
  41 static void     mounts_changed                   (GUnixMountMonitor *mount_monitor,
  42                                                   gpointer           user_data);
  43
  44 G_DEFINE_ABSTRACT_TYPE (GLocalDirectoryMonitor, g_local_directory_monitor, G_TYPE_FILE_MONITOR)
  45
  46 static void
  47 g_local_directory_monitor_finalize (GObject *object)
  48 {
  49   GLocalDirectoryMonitor *local_monitor;
  50   local_monitor = G_LOCAL_DIRECTORY_MONITOR (object);
  51
  52   g_free (local_monitor->dirname);
  53
  54   if (local_monitor->mount_monitor)
  55     {
  56       g_signal_handlers_disconnect_by_func (local_monitor->mount_monitor, mounts_changed, local_monitor);
  57       g_object_unref (local_monitor->mount_monitor);
  58       local_monitor->mount_monitor = NULL;
  59     }
  60
  61   G_OBJECT_CLASS (g_local_directory_monitor_parent_class)->finalize (object);
  62 }
  63
  64 static void
  65 g_local_directory_monitor_set_property (GObject      *object,
  66                                         guint         property_id,
  67                                         const GValue *value,
  68                                         GParamSpec   *pspec)
  69 {
  70   GLocalDirectoryMonitor *local_monitor = G_LOCAL_DIRECTORY_MONITOR (object);
  71
  72   switch (property_id)
  73     {
  74     case PROP_DIRNAME:
  75       local_monitor->dirname = g_value_dup_string (value);
  76       break;
  77
  78     case PROP_FLAGS:
  79       local_monitor->flags = g_value_get_flags (value);
  80       break;
  81
  82     default:
  83       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
  84       break;
  85     }
  86 }
  87
  88 void
  89 g_local_directory_monitor_start (GLocalDirectoryMonitor *local_monitor)
  90 {
  91   GLocalDirectoryMonitorClass *class;
  92
  93   class = G_LOCAL_DIRECTORY_MONITOR_GET_CLASS (local_monitor);
  94
  95   if (!class->mount_notify && (local_monitor->flags & G_FILE_MONITOR_WATCH_MOUNTS))
  96     {
  97 #ifdef G_OS_WIN32
  98       /*claim everything was mounted */
  99       local_monitor->was_mounted = TRUE;
 100 #else
 101       GUnixMountEntry *mount;
 102
 103       /* Emulate unmount detection */
 104
 105       mount = g_unix_mount_at (local_monitor->dirname, NULL);
 106
 107       local_monitor->was_mounted = mount != NULL;
 108
 109       if (mount)
 110         g_unix_mount_free (mount);
 111
 112       local_monitor->mount_monitor = g_unix_mount_monitor_new ();
 113       g_signal_connect_object (local_monitor->mount_monitor, "mounts-changed",
 114                                G_CALLBACK (mounts_changed), local_monitor, 0);
 115 #endif
 116     }
 117
 118   if (class->start)
 119     class->start (local_monitor);
 120 }
 121
 122 static void
 123 g_local_directory_monitor_class_init (GLocalDirectoryMonitorClass* klass)
 124 {
 125   GObjectClass* gobject_class = G_OBJECT_CLASS (klass);
 126   GFileMonitorClass *file_monitor_class = G_FILE_MONITOR_CLASS (klass);
 127
 128   gobject_class->finalize = g_local_directory_monitor_finalize;
 129   gobject_class->set_property = g_local_directory_monitor_set_property;
 130
 131   file_monitor_class->cancel = g_local_directory_monitor_cancel;
 132
 133   g_object_class_install_property (gobject_class,
 134                                    PROP_DIRNAME,
 135                                    g_param_spec_string ("dirname",
 136                                                         P_("Directory name"),
 137                                                         P_("Directory to monitor"),
 138                                                         NULL,
 139                                                         G_PARAM_CONSTRUCT_ONLY|
 140                                                         G_PARAM_WRITABLE|
 141                                                         G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
 142   g_object_class_install_property (gobject_class,
 143                                    PROP_FLAGS,
 144                                    g_param_spec_flags ("flags",
 145                                                        P_("Monitor flags"),
 146                                                        P_("Monitor flags"),
 147                                                        G_TYPE_FILE_MONITOR_FLAGS,
 148                                                        0,
 149                                                        G_PARAM_CONSTRUCT_ONLY|
 150                                                        G_PARAM_WRITABLE|
 151                                                        G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
 152
 153   klass->mount_notify = FALSE;
 154 }
 155
 156 static void
 157 g_local_directory_monitor_init (GLocalDirectoryMonitor *local_monitor)
 158 {
 159 }
 160
 161 static void
 162 mounts_changed (GUnixMountMonitor *mount_monitor,
 163                 gpointer           user_data)
 164 {
 165   GLocalDirectoryMonitor *local_monitor = user_data;
 166 #ifdef G_OS_UNIX
 167   GUnixMountEntry *mount;
 168 #endif
 169   gboolean is_mounted;
 170   GFile *file;
 171
 172   /* Emulate unmount detection */
 173 #ifdef G_OS_UNIX
 174   mount = g_unix_mount_at (local_monitor->dirname, NULL);
 175
 176   is_mounted = mount != NULL;
 177
 178   if (mount)
 179     g_unix_mount_free (mount);
 180 #else
 181   /*claim everything was mounted */
 182   is_mounted = TRUE;
 183 #endif
 184
 185   if (local_monitor->was_mounted != is_mounted)
 186     {
 187       if (local_monitor->was_mounted && !is_mounted)
 188         {
 189           file = g_file_new_for_path (local_monitor->dirname);
 190           g_file_monitor_emit_event (G_FILE_MONITOR (local_monitor),
 191                                      file, NULL,
 192                                      G_FILE_MONITOR_EVENT_UNMOUNTED);
 193           g_object_unref (file);
 194         }
 195       local_monitor->was_mounted = is_mounted;
 196     }
 197 }
 198
 199 GFileMonitor*
 200 _g_local_directory_monitor_new (const char         *dirname,
 201                                 GFileMonitorFlags   flags,
 202                                 GMainContext       *context,
 203                                 gboolean            is_remote_fs,
 204                                 gboolean            do_start,
 205                                 GError            **error)
 206 {
 207   GFileMonitor *monitor = NULL;
 208   GType type = G_TYPE_INVALID;
 209
 210   if (is_remote_fs)
 211     type = _g_io_module_get_default_type (G_NFS_DIRECTORY_MONITOR_EXTENSION_POINT_NAME,
 212                                           "GIO_USE_FILE_MONITOR",
 213                                           G_STRUCT_OFFSET (GLocalDirectoryMonitorClass, is_supported));
 214
 215   if (type == G_TYPE_INVALID)
 216     type = _g_io_module_get_default_type (G_LOCAL_DIRECTORY_MONITOR_EXTENSION_POINT_NAME,
 217                                           "GIO_USE_FILE_MONITOR",
 218                                           G_STRUCT_OFFSET (GLocalDirectoryMonitorClass, is_supported));
 219
 220   if (type != G_TYPE_INVALID)
 221     monitor = G_FILE_MONITOR (g_object_new (type, "dirname", dirname, "flags", flags, "context", context, NULL));
 222   else
 223     g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
 224                          _("Unable to find default local directory monitor type"));
 225
 226   if (monitor && do_start)
 227     g_local_directory_monitor_start (G_LOCAL_DIRECTORY_MONITOR (monitor));
 228
 229   return monitor;
 230 }
 231
 232 static gboolean
 233 g_local_directory_monitor_cancel (GFileMonitor *monitor)
 234 {
 235   GLocalDirectoryMonitor *local_monitor = G_LOCAL_DIRECTORY_MONITOR (monitor);
 236
 237   if (local_monitor->mount_monitor)
 238     {
 239       g_signal_handlers_disconnect_by_func (local_monitor->mount_monitor, mounts_changed, local_monitor);
 240       g_object_unref (local_monitor->mount_monitor);
 241       local_monitor->mount_monitor = NULL;
 242     }
 243
 244   return TRUE;
 245 }