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 #include "gioalias.h"
35
36 enum
37 {
38 PROP_0,
39 PROP_DIRNAME
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
G_DEFINE_ABSTRACT_TYPE(GLocalDirectoryMonitor,g_local_directory_monitor,G_TYPE_FILE_MONITOR)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
g_local_directory_monitor_set_property(GObject * object,guint property_id,const GValue * value,GParamSpec * pspec)67 g_local_directory_monitor_set_property (GObject *object,
68 guint property_id,
69 const GValue *value,
70 GParamSpec *pspec)
71 {
72 switch (property_id)
73 {
74 case PROP_DIRNAME:
75 /* Do nothing */
76 break;
77 default:
78 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
79 break;
80 }
81 }
82
83 static GObject *
g_local_directory_monitor_constructor(GType type,guint n_construct_properties,GObjectConstructParam * construct_properties)84 g_local_directory_monitor_constructor (GType type,
85 guint n_construct_properties,
86 GObjectConstructParam *construct_properties)
87 {
88 GObject *obj;
89 GLocalDirectoryMonitorClass *klass;
90 GObjectClass *parent_class;
91 GLocalDirectoryMonitor *local_monitor;
92 const gchar *dirname = NULL;
93 gint i;
94
95 klass = G_LOCAL_DIRECTORY_MONITOR_CLASS (g_type_class_peek (G_TYPE_LOCAL_DIRECTORY_MONITOR));
96 parent_class = G_OBJECT_CLASS (g_type_class_peek_parent (klass));
97 obj = parent_class->constructor (type,
98 n_construct_properties,
99 construct_properties);
100
101 local_monitor = G_LOCAL_DIRECTORY_MONITOR (obj);
102
103 for (i = 0; i < n_construct_properties; i++)
104 {
105 if (strcmp ("dirname", g_param_spec_get_name (construct_properties[i].pspec)) == 0)
106 {
107 g_warn_if_fail (G_VALUE_HOLDS_STRING (construct_properties[i].value));
108 dirname = g_value_get_string (construct_properties[i].value);
109 break;
110 }
111 }
112
113 local_monitor->dirname = g_strdup (dirname);
114
115 if (!klass->mount_notify)
116 {
117 #ifdef G_OS_WIN32
118 /*claim everything was mounted */
119 local_monitor->was_mounted = TRUE;
120 #else
121 GUnixMountEntry *mount;
122
123 /* Emulate unmount detection */
124
125 mount = g_unix_mount_at (local_monitor->dirname, NULL);
126
127 local_monitor->was_mounted = mount != NULL;
128
129 if (mount)
130 g_unix_mount_free (mount);
131
132 local_monitor->mount_monitor = g_unix_mount_monitor_new ();
133 g_signal_connect_object (local_monitor->mount_monitor, "mounts-changed",
134 G_CALLBACK (mounts_changed), local_monitor, 0);
135 #endif
136 }
137
138 return obj;
139 }
140
141 static void
g_local_directory_monitor_class_init(GLocalDirectoryMonitorClass * klass)142 g_local_directory_monitor_class_init (GLocalDirectoryMonitorClass* klass)
143 {
144 GObjectClass* gobject_class = G_OBJECT_CLASS (klass);
145 GFileMonitorClass *file_monitor_class = G_FILE_MONITOR_CLASS (klass);
146
147 gobject_class->finalize = g_local_directory_monitor_finalize;
148 gobject_class->set_property = g_local_directory_monitor_set_property;
149 gobject_class->constructor = g_local_directory_monitor_constructor;
150
151 file_monitor_class->cancel = g_local_directory_monitor_cancel;
152
153 g_object_class_install_property (gobject_class,
154 PROP_DIRNAME,
155 g_param_spec_string ("dirname",
156 P_("Directory name"),
157 P_("Directory to monitor"),
158 NULL,
159 G_PARAM_CONSTRUCT_ONLY|
160 G_PARAM_WRITABLE|
161 G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
162
163 klass->mount_notify = FALSE;
164 }
165
166 static void
g_local_directory_monitor_init(GLocalDirectoryMonitor * local_monitor)167 g_local_directory_monitor_init (GLocalDirectoryMonitor *local_monitor)
168 {
169 }
170
171 static void
mounts_changed(GUnixMountMonitor * mount_monitor,gpointer user_data)172 mounts_changed (GUnixMountMonitor *mount_monitor,
173 gpointer user_data)
174 {
175 GLocalDirectoryMonitor *local_monitor = user_data;
176 GUnixMountEntry *mount;
177 gboolean is_mounted;
178 GFile *file;
179
180 /* Emulate unmount detection */
181 #ifdef G_OS_WIN32
182 mount = NULL;
183 /*claim everything was mounted */
184 is_mounted = TRUE;
185 #else
186 mount = g_unix_mount_at (local_monitor->dirname, NULL);
187
188 is_mounted = mount != NULL;
189
190 if (mount)
191 g_unix_mount_free (mount);
192 #endif
193
194 if (local_monitor->was_mounted != is_mounted)
195 {
196 if (local_monitor->was_mounted && !is_mounted)
197 {
198 file = g_file_new_for_path (local_monitor->dirname);
199 g_file_monitor_emit_event (G_FILE_MONITOR (local_monitor),
200 file, NULL,
201 G_FILE_MONITOR_EVENT_UNMOUNTED);
202 g_object_unref (file);
203 }
204 local_monitor->was_mounted = is_mounted;
205 }
206 }
207
208 static gpointer
get_default_local_directory_monitor(gpointer data)209 get_default_local_directory_monitor (gpointer data)
210 {
211 GLocalDirectoryMonitorClass *chosen_class;
212 GLocalDirectoryMonitorClass **ret = data;
213 GIOExtensionPoint *ep;
214 GList *extensions, *l;
215
216 _g_io_modules_ensure_loaded ();
217
218 ep = g_io_extension_point_lookup (G_LOCAL_DIRECTORY_MONITOR_EXTENSION_POINT_NAME);
219
220 extensions = g_io_extension_point_get_extensions (ep);
221
222 chosen_class = NULL;
223 for (l = extensions; l != NULL; l = l->next)
224 {
225 GIOExtension *extension = l->data;
226 GLocalDirectoryMonitorClass *klass;
227
228 klass = G_LOCAL_DIRECTORY_MONITOR_CLASS (g_io_extension_ref_class (extension));
229
230 if (klass->is_supported ())
231 {
232 chosen_class = klass;
233 break;
234 }
235 else
236 g_type_class_unref (klass);
237 }
238
239 if (chosen_class)
240 {
241 *ret = chosen_class;
242 return (gpointer)G_TYPE_FROM_CLASS (chosen_class);
243 }
244 else
245 return (gpointer)G_TYPE_INVALID;
246 }
247
248 /**
249 * _g_local_directory_monitor_new:
250 * @dirname: filename of the directory to monitor.
251 * @flags: #GFileMonitorFlags.
252 *
253 * Returns: new #GFileMonitor for the given @dirname.
254 **/
255 GFileMonitor*
_g_local_directory_monitor_new(const char * dirname,GFileMonitorFlags flags,GError ** error)256 _g_local_directory_monitor_new (const char *dirname,
257 GFileMonitorFlags flags,
258 GError **error)
259 {
260 static GOnce once_init = G_ONCE_INIT;
261 GTypeClass *type_class;
262 GFileMonitor *monitor;
263 GType type;
264
265 type_class = NULL;
266 g_once (&once_init, get_default_local_directory_monitor, &type_class);
267 type = (GType)once_init.retval;
268
269 monitor = NULL;
270 if (type != G_TYPE_INVALID)
271 monitor = G_FILE_MONITOR (g_object_new (type, "dirname", dirname, NULL));
272 else
273 g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
274 _("Unable to find default local directory monitor type"));
275
276 /* This is non-null on first pass here. Unref the class now.
277 * This is to avoid unloading the module and then loading it
278 * again which would happen if we unrefed the class
279 * before creating the monitor.
280 */
281
282 if (type_class)
283 g_type_class_unref (type_class);
284
285 return monitor;
286 }
287
288 static gboolean
g_local_directory_monitor_cancel(GFileMonitor * monitor)289 g_local_directory_monitor_cancel (GFileMonitor *monitor)
290 {
291 GLocalDirectoryMonitor *local_monitor = G_LOCAL_DIRECTORY_MONITOR (monitor);
292
293 if (local_monitor->mount_monitor)
294 {
295 g_signal_handlers_disconnect_by_func (local_monitor->mount_monitor, mounts_changed, local_monitor);
296 g_object_unref (local_monitor->mount_monitor);
297 local_monitor->mount_monitor = NULL;
298 }
299
300 return TRUE;
301 }
302
303 #define __G_LOCAL_DIRECTORY_MONITOR_C__
304 #include "gioaliasdef.c"
305