1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2
3 /* GIO - GLib Input, Output and Streaming Library
4 *
5 * Copyright (C) 2006-2007 Red Hat, Inc.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General
18 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
19 *
20 * Author: Alexander Larsson <alexl@redhat.com>
21 * David Zeuthen <davidz@redhat.com>
22 */
23
24 #include "config.h"
25
26 #include <string.h>
27
28 #include <glib.h>
29 #include "gunixvolumemonitor.h"
30 #include "gunixmounts.h"
31 #include "gunixmount.h"
32 #include "gunixvolume.h"
33 #include "gmount.h"
34 #include "gmountprivate.h"
35 #include "giomodule.h"
36 #include "glibintl.h"
37
38
39 struct _GUnixVolumeMonitor {
40 GNativeVolumeMonitor parent;
41
42 GUnixMountMonitor *mount_monitor;
43
44 GList *last_mountpoints;
45 GList *last_mounts;
46
47 GList *volumes;
48 GList *mounts;
49 };
50
51 static void mountpoints_changed (GUnixMountMonitor *mount_monitor,
52 gpointer user_data);
53 static void mounts_changed (GUnixMountMonitor *mount_monitor,
54 gpointer user_data);
55 static void update_volumes (GUnixVolumeMonitor *monitor);
56 static void update_mounts (GUnixVolumeMonitor *monitor);
57
58 #define g_unix_volume_monitor_get_type _g_unix_volume_monitor_get_type
59 G_DEFINE_TYPE_WITH_CODE (GUnixVolumeMonitor, g_unix_volume_monitor, G_TYPE_NATIVE_VOLUME_MONITOR,
60 g_io_extension_point_implement (G_NATIVE_VOLUME_MONITOR_EXTENSION_POINT_NAME,
61 g_define_type_id,
62 "unix",
63 0));
64
65 static void
g_unix_volume_monitor_finalize(GObject * object)66 g_unix_volume_monitor_finalize (GObject *object)
67 {
68 GUnixVolumeMonitor *monitor;
69
70 monitor = G_UNIX_VOLUME_MONITOR (object);
71
72 g_signal_handlers_disconnect_by_func (monitor->mount_monitor, mountpoints_changed, monitor);
73 g_signal_handlers_disconnect_by_func (monitor->mount_monitor, mounts_changed, monitor);
74
75 g_object_unref (monitor->mount_monitor);
76
77 g_list_free_full (monitor->last_mountpoints, (GDestroyNotify) g_unix_mount_point_free);
78 g_list_free_full (monitor->last_mounts, (GDestroyNotify) g_unix_mount_free);
79
80 g_list_free_full (monitor->volumes, g_object_unref);
81 g_list_free_full (monitor->mounts, g_object_unref);
82
83 G_OBJECT_CLASS (g_unix_volume_monitor_parent_class)->finalize (object);
84 }
85
86 static void
g_unix_volume_monitor_dispose(GObject * object)87 g_unix_volume_monitor_dispose (GObject *object)
88 {
89 GUnixVolumeMonitor *monitor;
90
91 monitor = G_UNIX_VOLUME_MONITOR (object);
92
93 g_list_free_full (monitor->volumes, g_object_unref);
94 monitor->volumes = NULL;
95
96 g_list_free_full (monitor->mounts, g_object_unref);
97 monitor->mounts = NULL;
98
99 G_OBJECT_CLASS (g_unix_volume_monitor_parent_class)->dispose (object);
100 }
101
102 static GList *
get_mounts(GVolumeMonitor * volume_monitor)103 get_mounts (GVolumeMonitor *volume_monitor)
104 {
105 GUnixVolumeMonitor *monitor;
106
107 monitor = G_UNIX_VOLUME_MONITOR (volume_monitor);
108
109 return g_list_copy_deep (monitor->mounts, (GCopyFunc) g_object_ref, NULL);
110 }
111
112 static GList *
get_volumes(GVolumeMonitor * volume_monitor)113 get_volumes (GVolumeMonitor *volume_monitor)
114 {
115 GUnixVolumeMonitor *monitor;
116
117 monitor = G_UNIX_VOLUME_MONITOR (volume_monitor);
118
119 return g_list_copy_deep (monitor->volumes, (GCopyFunc) g_object_ref, NULL);
120 }
121
122 static GList *
get_connected_drives(GVolumeMonitor * volume_monitor)123 get_connected_drives (GVolumeMonitor *volume_monitor)
124 {
125 return NULL;
126 }
127
128 static GVolume *
get_volume_for_uuid(GVolumeMonitor * volume_monitor,const char * uuid)129 get_volume_for_uuid (GVolumeMonitor *volume_monitor, const char *uuid)
130 {
131 return NULL;
132 }
133
134 static GMount *
get_mount_for_uuid(GVolumeMonitor * volume_monitor,const char * uuid)135 get_mount_for_uuid (GVolumeMonitor *volume_monitor, const char *uuid)
136 {
137 return NULL;
138 }
139
140 static gboolean
is_supported(void)141 is_supported (void)
142 {
143 return TRUE;
144 }
145
146 static GMount *
get_mount_for_mount_path(const char * mount_path,GCancellable * cancellable)147 get_mount_for_mount_path (const char *mount_path,
148 GCancellable *cancellable)
149 {
150 GUnixMountEntry *mount_entry;
151 GUnixMount *mount;
152
153 mount_entry = g_unix_mount_at (mount_path, NULL);
154
155 if (!mount_entry)
156 return NULL;
157
158 /* TODO: Set mountable volume? */
159 mount = _g_unix_mount_new (NULL, mount_entry, NULL);
160
161 g_unix_mount_free (mount_entry);
162
163 return G_MOUNT (mount);
164 }
165
166 static void
g_unix_volume_monitor_class_init(GUnixVolumeMonitorClass * klass)167 g_unix_volume_monitor_class_init (GUnixVolumeMonitorClass *klass)
168 {
169 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
170 GVolumeMonitorClass *monitor_class = G_VOLUME_MONITOR_CLASS (klass);
171 GNativeVolumeMonitorClass *native_class = G_NATIVE_VOLUME_MONITOR_CLASS (klass);
172
173 gobject_class->finalize = g_unix_volume_monitor_finalize;
174 gobject_class->dispose = g_unix_volume_monitor_dispose;
175
176 monitor_class->get_mounts = get_mounts;
177 monitor_class->get_volumes = get_volumes;
178 monitor_class->get_connected_drives = get_connected_drives;
179 monitor_class->get_volume_for_uuid = get_volume_for_uuid;
180 monitor_class->get_mount_for_uuid = get_mount_for_uuid;
181 monitor_class->is_supported = is_supported;
182
183 native_class->get_mount_for_mount_path = get_mount_for_mount_path;
184 }
185
186 void
_g_unix_volume_monitor_update(GUnixVolumeMonitor * unix_monitor)187 _g_unix_volume_monitor_update (GUnixVolumeMonitor *unix_monitor)
188 {
189 /* Update both to make sure volumes are created before mounts */
190 update_volumes (unix_monitor);
191 update_mounts (unix_monitor);
192 }
193
194 static void
mountpoints_changed(GUnixMountMonitor * mount_monitor,gpointer user_data)195 mountpoints_changed (GUnixMountMonitor *mount_monitor,
196 gpointer user_data)
197 {
198 GUnixVolumeMonitor *unix_monitor = user_data;
199
200 _g_unix_volume_monitor_update (unix_monitor);
201 }
202
203 static void
mounts_changed(GUnixMountMonitor * mount_monitor,gpointer user_data)204 mounts_changed (GUnixMountMonitor *mount_monitor,
205 gpointer user_data)
206 {
207 GUnixVolumeMonitor *unix_monitor = user_data;
208
209 _g_unix_volume_monitor_update (unix_monitor);
210 }
211
212 static void
g_unix_volume_monitor_init(GUnixVolumeMonitor * unix_monitor)213 g_unix_volume_monitor_init (GUnixVolumeMonitor *unix_monitor)
214 {
215
216 unix_monitor->mount_monitor = g_unix_mount_monitor_get ();
217
218 g_signal_connect (unix_monitor->mount_monitor,
219 "mounts-changed", G_CALLBACK (mounts_changed),
220 unix_monitor);
221
222 g_signal_connect (unix_monitor->mount_monitor,
223 "mountpoints-changed", G_CALLBACK (mountpoints_changed),
224 unix_monitor);
225
226 _g_unix_volume_monitor_update (unix_monitor);
227 }
228
229 GVolumeMonitor *
_g_unix_volume_monitor_new(void)230 _g_unix_volume_monitor_new (void)
231 {
232 GUnixVolumeMonitor *monitor;
233
234 monitor = g_object_new (G_TYPE_UNIX_VOLUME_MONITOR, NULL);
235
236 return G_VOLUME_MONITOR (monitor);
237 }
238
239 static void
diff_sorted_lists(GList * list1,GList * list2,GCompareFunc compare,GList ** added,GList ** removed)240 diff_sorted_lists (GList *list1,
241 GList *list2,
242 GCompareFunc compare,
243 GList **added,
244 GList **removed)
245 {
246 int order;
247
248 *added = *removed = NULL;
249
250 while (list1 != NULL &&
251 list2 != NULL)
252 {
253 order = (*compare) (list1->data, list2->data);
254 if (order < 0)
255 {
256 *removed = g_list_prepend (*removed, list1->data);
257 list1 = list1->next;
258 }
259 else if (order > 0)
260 {
261 *added = g_list_prepend (*added, list2->data);
262 list2 = list2->next;
263 }
264 else
265 { /* same item */
266 list1 = list1->next;
267 list2 = list2->next;
268 }
269 }
270
271 while (list1 != NULL)
272 {
273 *removed = g_list_prepend (*removed, list1->data);
274 list1 = list1->next;
275 }
276 while (list2 != NULL)
277 {
278 *added = g_list_prepend (*added, list2->data);
279 list2 = list2->next;
280 }
281 }
282
283 GUnixVolume *
_g_unix_volume_monitor_lookup_volume_for_mount_path(GUnixVolumeMonitor * monitor,const char * mount_path)284 _g_unix_volume_monitor_lookup_volume_for_mount_path (GUnixVolumeMonitor *monitor,
285 const char *mount_path)
286 {
287 GList *l;
288
289 for (l = monitor->volumes; l != NULL; l = l->next)
290 {
291 GUnixVolume *volume = l->data;
292
293 if (_g_unix_volume_has_mount_path (volume, mount_path))
294 return volume;
295 }
296
297 return NULL;
298 }
299
300 static GUnixMount *
find_mount_by_mountpath(GUnixVolumeMonitor * monitor,const char * mount_path)301 find_mount_by_mountpath (GUnixVolumeMonitor *monitor,
302 const char *mount_path)
303 {
304 GList *l;
305
306 for (l = monitor->mounts; l != NULL; l = l->next)
307 {
308 GUnixMount *mount = l->data;
309
310 if (_g_unix_mount_has_mount_path (mount, mount_path))
311 return mount;
312 }
313
314 return NULL;
315 }
316
317 static void
update_volumes(GUnixVolumeMonitor * monitor)318 update_volumes (GUnixVolumeMonitor *monitor)
319 {
320 GList *new_mountpoints;
321 GList *removed, *added;
322 GList *l;
323 GUnixVolume *volume;
324
325 new_mountpoints = g_unix_mount_points_get (NULL);
326
327 new_mountpoints = g_list_sort (new_mountpoints, (GCompareFunc) g_unix_mount_point_compare);
328
329 diff_sorted_lists (monitor->last_mountpoints,
330 new_mountpoints, (GCompareFunc) g_unix_mount_point_compare,
331 &added, &removed);
332
333 for (l = removed; l != NULL; l = l->next)
334 {
335 GUnixMountPoint *mountpoint = l->data;
336
337 volume = _g_unix_volume_monitor_lookup_volume_for_mount_path (monitor,
338 g_unix_mount_point_get_mount_path (mountpoint));
339 if (volume)
340 {
341 _g_unix_volume_disconnected (volume);
342 monitor->volumes = g_list_remove (monitor->volumes, volume);
343 g_signal_emit_by_name (monitor, "volume-removed", volume);
344 g_signal_emit_by_name (volume, "removed");
345 g_object_unref (volume);
346 }
347 }
348
349 for (l = added; l != NULL; l = l->next)
350 {
351 GUnixMountPoint *mountpoint = l->data;
352
353 volume = _g_unix_volume_new (G_VOLUME_MONITOR (monitor), mountpoint);
354 if (volume)
355 {
356 monitor->volumes = g_list_prepend (monitor->volumes, volume);
357 g_signal_emit_by_name (monitor, "volume-added", volume);
358 }
359 }
360
361 g_list_free (added);
362 g_list_free (removed);
363 g_list_free_full (monitor->last_mountpoints, (GDestroyNotify) g_unix_mount_point_free);
364 monitor->last_mountpoints = new_mountpoints;
365 }
366
367 static void
update_mounts(GUnixVolumeMonitor * monitor)368 update_mounts (GUnixVolumeMonitor *monitor)
369 {
370 GList *new_mounts;
371 GList *removed, *added;
372 GList *l;
373 GUnixMount *mount;
374 GUnixVolume *volume;
375 const char *mount_path;
376
377 new_mounts = g_unix_mounts_get (NULL);
378
379 new_mounts = g_list_sort (new_mounts, (GCompareFunc) g_unix_mount_compare);
380
381 diff_sorted_lists (monitor->last_mounts,
382 new_mounts, (GCompareFunc) g_unix_mount_compare,
383 &added, &removed);
384
385 for (l = removed; l != NULL; l = l->next)
386 {
387 GUnixMountEntry *mount_entry = l->data;
388
389 mount = find_mount_by_mountpath (monitor, g_unix_mount_get_mount_path (mount_entry));
390 if (mount)
391 {
392 _g_unix_mount_unmounted (mount);
393 monitor->mounts = g_list_remove (monitor->mounts, mount);
394 g_signal_emit_by_name (monitor, "mount-removed", mount);
395 g_signal_emit_by_name (mount, "unmounted");
396 g_object_unref (mount);
397 }
398 }
399
400 for (l = added; l != NULL; l = l->next)
401 {
402 GUnixMountEntry *mount_entry = l->data;
403
404 mount_path = g_unix_mount_get_mount_path (mount_entry);
405
406 volume = _g_unix_volume_monitor_lookup_volume_for_mount_path (monitor, mount_path);
407 mount = _g_unix_mount_new (G_VOLUME_MONITOR (monitor), mount_entry, volume);
408 if (mount)
409 {
410 monitor->mounts = g_list_prepend (monitor->mounts, mount);
411 g_signal_emit_by_name (monitor, "mount-added", mount);
412 }
413 }
414
415 g_list_free (added);
416 g_list_free (removed);
417 g_list_free_full (monitor->last_mounts, (GDestroyNotify) g_unix_mount_free);
418 monitor->last_mounts = new_mounts;
419 }
420