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, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  *
  20  * Author: Alexander Larsson <alexl@redhat.com>
  21  */
  22
  23 #include "config.h"
  24
  25 #include "glocaldirectorymonitor.h"
  26 #include "gunixmounts.h"
  27 #include "giomodule-priv.h"
  28 #include "gfile.h"
  29 #include "gioerror.h"
  30 #include "glibintl.h"
  31
  32 #include <string.h>
  33
  34
  35 enum
  36 {
  37   PROP_0,
  38   PROP_DIRNAME,
  39   PROP_FLAGS
  40 };
  41
  42 static gboolean g_local_directory_monitor_cancel (GFileMonitor      *monitor);
  43 static void     mounts_changed                   (GUnixMountMonitor *mount_monitor,
  44                                                   gpointer           user_data);
  45
  46 G_DEFINE_ABSTRACT_TYPE (GLocalDirectoryMonitor, g_local_directory_monitor, G_TYPE_FILE_MONITOR)
  47
  48 static void
  49 g_local_directory_monitor_finalize (GObject *object)
  50 {
  51   GLocalDirectoryMonitor *local_monitor;
  52   local_monitor = G_LOCAL_DIRECTORY_MONITOR (object);
  53
  54   g_free (local_monitor->dirname);
  55
  56   if (local_monitor->mount_monitor)
  57     {
  58       g_signal_handlers_disconnect_by_func (local_monitor->mount_monitor, mounts_changed, local_monitor);
  59       g_object_unref (local_monitor->mount_monitor);
  60       local_monitor->mount_monitor = NULL;
  61     }
  62
  63   G_OBJECT_CLASS (g_local_directory_monitor_parent_class)->finalize (object);
  64 }
  65
  66 static void
  67 g_local_directory_monitor_set_property (GObject      *object,
  68                                         guint         property_id,
  69                                         const GValue *value,
  70                                         GParamSpec   *pspec)
  71 {
  72   GLocalDirectoryMonitor *local_monitor = G_LOCAL_DIRECTORY_MONITOR (object);
  73
  74   switch (property_id)
  75     {
  76     case PROP_DIRNAME:
  77       local_monitor->dirname = g_value_dup_string (value);
  78       break;
  79
  80     case PROP_FLAGS:
  81       local_monitor->flags = g_value_get_flags (value);
  82       break;
  83
  84     default:
  85       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
  86       break;
  87     }
  88 }
  89
  90 void
  91 g_local_directory_monitor_start (GLocalDirectoryMonitor *local_monitor)
  92 {
  93   GLocalDirectoryMonitorClass *class;
  94
  95   class = G_LOCAL_DIRECTORY_MONITOR_GET_CLASS (local_monitor);
  96
  97   if (!class->mount_notify && (local_monitor->flags & G_FILE_MONITOR_WATCH_MOUNTS))
  98     {
  99 #ifdef G_OS_WIN32
 100       /*claim everything was mounted */
 101       local_monitor->was_mounted = TRUE;
 102 #else
 103       GUnixMountEntry *mount;
 104
 105       /* Emulate unmount detection */
 106
 107       mount = g_unix_mount_at (local_monitor->dirname, NULL);
 108
 109       local_monitor->was_mounted = mount != NULL;
 110
 111       if (mount)
 112         g_unix_mount_free (mount);
 113
 114       local_monitor->mount_monitor = g_unix_mount_monitor_new ();
 115       g_signal_connect_object (local_monitor->mount_monitor, "mounts-changed",
 116                                G_CALLBACK (mounts_changed), local_monitor, 0);
 117 #endif
 118     }
 119
 120   if (class->start)
 121     class->start (local_monitor);
 122 }
 123
 124 static void
 125 g_local_directory_monitor_class_init (GLocalDirectoryMonitorClass* klass)
 126 {
 127   GObjectClass* gobject_class = G_OBJECT_CLASS (klass);
 128   GFileMonitorClass *file_monitor_class = G_FILE_MONITOR_CLASS (klass);
 129
 130   gobject_class->finalize = g_local_directory_monitor_finalize;
 131   gobject_class->set_property = g_local_directory_monitor_set_property;
 132
 133   file_monitor_class->cancel = g_local_directory_monitor_cancel;
 134
 135   g_object_class_install_property (gobject_class,
 136                                    PROP_DIRNAME,
 137                                    g_param_spec_string ("dirname",
 138                                                         P_("Directory name"),
 139                                                         P_("Directory to monitor"),
 140                                                         NULL,
 141                                                         G_PARAM_CONSTRUCT_ONLY|
 142                                                         G_PARAM_WRITABLE|
 143                                                         G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
 144   g_object_class_install_property (gobject_class,
 145                                    PROP_FLAGS,
 146                                    g_param_spec_flags ("flags",
 147                                                        P_("Monitor flags"),
 148                                                        P_("Monitor flags"),
 149                                                        G_TYPE_FILE_MONITOR_FLAGS,
 150                                                        0,
 151                                                        G_PARAM_CONSTRUCT_ONLY|
 152                                                        G_PARAM_WRITABLE|
 153                                                        G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
 154
 155   klass->mount_notify = FALSE;
 156 }
 157
 158 static void
 159 g_local_directory_monitor_init (GLocalDirectoryMonitor *local_monitor)
 160 {
 161 }
 162
 163 static void
 164 mounts_changed (GUnixMountMonitor *mount_monitor,
 165                 gpointer           user_data)
 166 {
 167   GLocalDirectoryMonitor *local_monitor = user_data;
 168 #ifdef G_OS_UNIX
 169   GUnixMountEntry *mount;
 170 #endif
 171   gboolean is_mounted;
 172   GFile *file;
 173
 174   /* Emulate unmount detection */
 175 #ifdef G_OS_UNIX
 176   mount = g_unix_mount_at (local_monitor->dirname, NULL);
 177
 178   is_mounted = mount != NULL;
 179
 180   if (mount)
 181     g_unix_mount_free (mount);
 182 #else
 183   /*claim everything was mounted */
 184   is_mounted = TRUE;
 185 #endif
 186
 187   if (local_monitor->was_mounted != is_mounted)
 188     {
 189       if (local_monitor->was_mounted && !is_mounted)
 190         {
 191           file = g_file_new_for_path (local_monitor->dirname);
 192           g_file_monitor_emit_event (G_FILE_MONITOR (local_monitor),
 193                                      file, NULL,
 194                                      G_FILE_MONITOR_EVENT_UNMOUNTED);
 195           g_object_unref (file);
 196         }
 197       local_monitor->was_mounted = is_mounted;
 198     }
 199 }
 200
 201 GFileMonitor*
 202 _g_local_directory_monitor_new (const char         *dirname,
 203                                 GFileMonitorFlags   flags,
 204                                 GMainContext       *context,
 205                                 gboolean            is_remote_fs,
 206                                 gboolean            do_start,
 207                                 GError            **error)
 208 {
 209   GFileMonitor *monitor = NULL;
 210   GType type = G_TYPE_INVALID;
 211
 212   if (is_remote_fs)
 213     type = _g_io_module_get_default_type (G_NFS_DIRECTORY_MONITOR_EXTENSION_POINT_NAME,
 214                                           "GIO_USE_FILE_MONITOR",
 215                                           G_STRUCT_OFFSET (GLocalDirectoryMonitorClass, is_supported));
 216
 217   if (type == G_TYPE_INVALID)
 218     type = _g_io_module_get_default_type (G_LOCAL_DIRECTORY_MONITOR_EXTENSION_POINT_NAME,
 219                                           "GIO_USE_FILE_MONITOR",
 220                                           G_STRUCT_OFFSET (GLocalDirectoryMonitorClass, is_supported));
 221
 222   if (type != G_TYPE_INVALID)
 223     monitor = G_FILE_MONITOR (g_object_new (type, "dirname", dirname, "flags", flags, "context", context, NULL));
 224   else
 225     g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
 226                          _("Unable to find default local directory monitor type"));
 227
 228   if (monitor && do_start)
 229     g_local_directory_monitor_start (G_LOCAL_DIRECTORY_MONITOR (monitor));
 230
 231   return monitor;
 232 }
 233
 234 static gboolean
 235 g_local_directory_monitor_cancel (GFileMonitor *monitor)
 236 {
 237   GLocalDirectoryMonitor *local_monitor = G_LOCAL_DIRECTORY_MONITOR (monitor);
 238
 239   if (local_monitor->mount_monitor)
 240     {
 241       g_signal_handlers_disconnect_by_func (local_monitor->mount_monitor, mounts_changed, local_monitor);
 242       g_object_unref (local_monitor->mount_monitor);
 243       local_monitor->mount_monitor = NULL;
 244     }
 245
 246   return TRUE;
 247 }