gio/gunixvolume.c

   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 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 #include <sys/wait.h>
  28 #include <unistd.h>
  29
  30 #include <glib.h>
  31 #include "gunixvolume.h"
  32 #include "gunixmount.h"
  33 #include "gunixmounts.h"
  34 #include "gthemedicon.h"
  35 #include "gvolume.h"
  36 #include "gvolumemonitor.h"
  37 #include "gtask.h"
  38 #include "gioerror.h"
  39 #include "glibintl.h"
  40 /* for BUFSIZ */
  41 #include <stdio.h>
  42
  43
  44 struct _GUnixVolume {
  45   GObject parent;
  46
  47   GVolumeMonitor *volume_monitor;
  48   GUnixMount     *mount; /* owned by volume monitor */
  49
  50   char *device_path;
  51   char *mount_path;
  52   gboolean can_eject;
  53
  54   char *identifier;
  55   char *identifier_type;
  56
  57   char *name;
  58   GIcon *icon;
  59   GIcon *symbolic_icon;
  60 };
  61
  62 static void g_unix_volume_volume_iface_init (GVolumeIface *iface);
  63
  64 #define g_unix_volume_get_type _g_unix_volume_get_type
  65 G_DEFINE_TYPE_WITH_CODE (GUnixVolume, g_unix_volume, G_TYPE_OBJECT,
  66                          G_IMPLEMENT_INTERFACE (G_TYPE_VOLUME,
  67                                                 g_unix_volume_volume_iface_init))
  68
  69 static void
  70 g_unix_volume_finalize (GObject *object)
  71 {
  72   GUnixVolume *volume;
  73
  74   volume = G_UNIX_VOLUME (object);
  75
  76   if (volume->volume_monitor != NULL)
  77     g_object_unref (volume->volume_monitor);
  78
  79   if (volume->mount)
  80     _g_unix_mount_unset_volume (volume->mount, volume);
  81
  82   g_object_unref (volume->icon);
  83   g_object_unref (volume->symbolic_icon);
  84   g_free (volume->name);
  85   g_free (volume->mount_path);
  86   g_free (volume->device_path);
  87   g_free (volume->identifier);
  88   g_free (volume->identifier_type);
  89
  90   G_OBJECT_CLASS (g_unix_volume_parent_class)->finalize (object);
  91 }
  92
  93 static void
  94 g_unix_volume_class_init (GUnixVolumeClass *klass)
  95 {
  96   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  97
  98   gobject_class->finalize = g_unix_volume_finalize;
  99 }
 100
 101 static void
 102 g_unix_volume_init (GUnixVolume *unix_volume)
 103 {
 104 }
 105
 106 GUnixVolume *
 107 _g_unix_volume_new (GVolumeMonitor  *volume_monitor,
 108                     GUnixMountPoint *mountpoint)
 109 {
 110   GUnixVolume *volume;
 111
 112   if (!(g_unix_mount_point_is_user_mountable (mountpoint) ||
 113         g_str_has_prefix (g_unix_mount_point_get_device_path (mountpoint), "/vol/")) ||
 114       g_unix_mount_point_is_loopback (mountpoint))
 115     return NULL;
 116
 117   volume = g_object_new (G_TYPE_UNIX_VOLUME, NULL);
 118   volume->volume_monitor = volume_monitor != NULL ? g_object_ref (volume_monitor) : NULL;
 119   volume->mount_path = g_strdup (g_unix_mount_point_get_mount_path (mountpoint));
 120   volume->device_path = g_strdup (g_unix_mount_point_get_device_path (mountpoint));
 121   volume->can_eject = g_unix_mount_point_guess_can_eject (mountpoint);
 122
 123   volume->name = g_unix_mount_point_guess_name (mountpoint);
 124   volume->icon = g_unix_mount_point_guess_icon (mountpoint);
 125   volume->symbolic_icon = g_unix_mount_point_guess_symbolic_icon (mountpoint);
 126
 127
 128   if (strcmp (g_unix_mount_point_get_fs_type (mountpoint), "nfs") == 0)
 129     {
 130       volume->identifier_type = g_strdup (G_VOLUME_IDENTIFIER_KIND_NFS_MOUNT);
 131       volume->identifier = g_strdup (volume->device_path);
 132     }
 133   else if (g_str_has_prefix (volume->device_path, "LABEL="))
 134     {
 135       volume->identifier_type = g_strdup (G_VOLUME_IDENTIFIER_KIND_LABEL);
 136       volume->identifier = g_strdup (volume->device_path + 6);
 137     }
 138   else if (g_str_has_prefix (volume->device_path, "UUID="))
 139     {
 140       volume->identifier_type = g_strdup (G_VOLUME_IDENTIFIER_KIND_UUID);
 141       volume->identifier = g_strdup (volume->device_path + 5);
 142     }
 143   else if (g_path_is_absolute (volume->device_path))
 144     {
 145       volume->identifier_type = g_strdup (G_VOLUME_IDENTIFIER_KIND_UNIX_DEVICE);
 146       volume->identifier = g_strdup (volume->device_path);
 147     }
 148
 149   return volume;
 150 }
 151
 152 void
 153 _g_unix_volume_disconnected (GUnixVolume *volume)
 154 {
 155   if (volume->mount)
 156     {
 157       _g_unix_mount_unset_volume (volume->mount, volume);
 158       volume->mount = NULL;
 159     }
 160 }
 161
 162 void
 163 _g_unix_volume_set_mount (GUnixVolume *volume,
 164                           GUnixMount  *mount)
 165 {
 166   if (volume->mount == mount)
 167     return;
 168
 169   if (volume->mount)
 170     _g_unix_mount_unset_volume (volume->mount, volume);
 171
 172   volume->mount = mount;
 173
 174   /* TODO: Emit changed in idle to avoid locking issues */
 175   g_signal_emit_by_name (volume, "changed");
 176   if (volume->volume_monitor != NULL)
 177     g_signal_emit_by_name (volume->volume_monitor, "volume-changed", volume);
 178 }
 179
 180 void
 181 _g_unix_volume_unset_mount (GUnixVolume  *volume,
 182                             GUnixMount *mount)
 183 {
 184   if (volume->mount == mount)
 185     {
 186       volume->mount = NULL;
 187       /* TODO: Emit changed in idle to avoid locking issues */
 188       g_signal_emit_by_name (volume, "changed");
 189       if (volume->volume_monitor != NULL)
 190         g_signal_emit_by_name (volume->volume_monitor, "volume-changed", volume);
 191     }
 192 }
 193
 194 static GIcon *
 195 g_unix_volume_get_icon (GVolume *volume)
 196 {
 197   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 198   return g_object_ref (unix_volume->icon);
 199 }
 200
 201 static GIcon *
 202 g_unix_volume_get_symbolic_icon (GVolume *volume)
 203 {
 204   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 205   return g_object_ref (unix_volume->symbolic_icon);
 206 }
 207
 208 static char *
 209 g_unix_volume_get_name (GVolume *volume)
 210 {
 211   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 212   return g_strdup (unix_volume->name);
 213 }
 214
 215 static char *
 216 g_unix_volume_get_uuid (GVolume *volume)
 217 {
 218   return NULL;
 219 }
 220
 221 static gboolean
 222 g_unix_volume_can_mount (GVolume *volume)
 223 {
 224   return TRUE;
 225 }
 226
 227 static gboolean
 228 g_unix_volume_can_eject (GVolume *volume)
 229 {
 230   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 231   return unix_volume->can_eject;
 232 }
 233
 234 static gboolean
 235 g_unix_volume_should_automount (GVolume *volume)
 236 {
 237   /* We automount all local volumes because we don't even
 238    * make the internal stuff visible
 239    */
 240   return TRUE;
 241 }
 242
 243 static GDrive *
 244 g_unix_volume_get_drive (GVolume *volume)
 245 {
 246   return NULL;
 247 }
 248
 249 static GMount *
 250 g_unix_volume_get_mount (GVolume *volume)
 251 {
 252   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 253
 254   if (unix_volume->mount != NULL)
 255     return g_object_ref (unix_volume->mount);
 256
 257   return NULL;
 258 }
 259
 260
 261 gboolean
 262 _g_unix_volume_has_mount_path (GUnixVolume *volume,
 263                                const char  *mount_path)
 264 {
 265   return strcmp (volume->mount_path, mount_path) == 0;
 266 }
 267
 268 static void
 269 eject_mount_done (GObject      *source,
 270                   GAsyncResult *result,
 271                   gpointer      user_data)
 272 {
 273   GSubprocess *subprocess = G_SUBPROCESS (source);
 274   GTask *task = user_data;
 275   GError *error = NULL;
 276   gchar *stderr_str;
 277
 278   if (!g_subprocess_communicate_utf8_finish (subprocess, result, NULL, &stderr_str, &error))
 279     {
 280       g_task_return_error (task, error);
 281       g_error_free (error);
 282     }
 283   else /* successful communication */
 284     {
 285       if (!g_subprocess_get_successful (subprocess))
 286         /* ...but bad exit code */
 287         g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED, "%s", stderr_str);
 288       else
 289         /* ...and successful exit code */
 290         g_task_return_boolean (task, TRUE);
 291
 292       g_free (stderr_str);
 293     }
 294
 295   g_object_unref (task);
 296 }
 297
 298 static void
 299 eject_mount_do (GVolume              *volume,
 300                 GCancellable         *cancellable,
 301                 GAsyncReadyCallback   callback,
 302                 gpointer              user_data,
 303                 const gchar * const  *argv)
 304 {
 305   GSubprocess *subprocess;
 306   GError *error = NULL;
 307   GTask *task;
 308
 309   task = g_task_new (volume, cancellable, callback, user_data);
 310
 311   if (g_task_return_error_if_cancelled (task))
 312     {
 313       g_object_unref (task);
 314       return;
 315     }
 316
 317   subprocess = g_subprocess_newv (argv, G_SUBPROCESS_FLAGS_STDOUT_SILENCE | G_SUBPROCESS_FLAGS_STDERR_PIPE, &error);
 318   g_assert_no_error (error);
 319
 320   g_subprocess_communicate_utf8_async (subprocess, NULL,
 321                                        g_task_get_cancellable (task),
 322                                        eject_mount_done, task);
 323 }
 324
 325 static void
 326 g_unix_volume_mount (GVolume            *volume,
 327                      GMountMountFlags    flags,
 328                      GMountOperation     *mount_operation,
 329                      GCancellable        *cancellable,
 330                      GAsyncReadyCallback  callback,
 331                      gpointer             user_data)
 332 {
 333   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 334   const gchar *argv[] = { "mount", NULL, NULL };
 335
 336   if (unix_volume->mount_path != NULL)
 337     argv[1] = unix_volume->mount_path;
 338   else
 339     argv[1] = unix_volume->device_path;
 340
 341   eject_mount_do (volume, cancellable, callback, user_data, argv);
 342 }
 343
 344 static gboolean
 345 g_unix_volume_mount_finish (GVolume        *volume,
 346                             GAsyncResult  *result,
 347                             GError       **error)
 348 {
 349   g_return_val_if_fail (g_task_is_valid (result, volume), FALSE);
 350
 351   return g_task_propagate_boolean (G_TASK (result), error);
 352 }
 353
 354 static void
 355 g_unix_volume_eject (GVolume             *volume,
 356                      GMountUnmountFlags   flags,
 357                      GCancellable        *cancellable,
 358                      GAsyncReadyCallback  callback,
 359                      gpointer             user_data)
 360 {
 361   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 362   const gchar *argv[] = { "eject", NULL, NULL };
 363
 364   argv[1] = unix_volume->device_path;
 365
 366   eject_mount_do (volume, cancellable, callback, user_data, argv);
 367 }
 368
 369 static gboolean
 370 g_unix_volume_eject_finish (GVolume       *volume,
 371                             GAsyncResult  *result,
 372                             GError       **error)
 373 {
 374   g_return_val_if_fail (g_task_is_valid (result, volume), FALSE);
 375
 376   return g_task_propagate_boolean (G_TASK (result), error);
 377 }
 378
 379 static gchar *
 380 g_unix_volume_get_identifier (GVolume     *volume,
 381                               const gchar *kind)
 382 {
 383   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 384
 385   if (unix_volume->identifier_type != NULL &&
 386       strcmp (kind, unix_volume->identifier_type) == 0)
 387     return g_strdup (unix_volume->identifier);
 388
 389   return NULL;
 390 }
 391
 392 static gchar **
 393 g_unix_volume_enumerate_identifiers (GVolume *volume)
 394 {
 395   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 396   gchar **res;
 397
 398   if (unix_volume->identifier_type)
 399     {
 400       res = g_new (gchar *, 2);
 401       res[0] = g_strdup (unix_volume->identifier_type);
 402       res[1] = NULL;
 403     }
 404   else
 405     {
 406       res = g_new (gchar *, 1);
 407       res[0] = NULL;
 408     }
 409
 410   return res;
 411 }
 412
 413 static void
 414 g_unix_volume_volume_iface_init (GVolumeIface *iface)
 415 {
 416   iface->get_name = g_unix_volume_get_name;
 417   iface->get_icon = g_unix_volume_get_icon;
 418   iface->get_symbolic_icon = g_unix_volume_get_symbolic_icon;
 419   iface->get_uuid = g_unix_volume_get_uuid;
 420   iface->get_drive = g_unix_volume_get_drive;
 421   iface->get_mount = g_unix_volume_get_mount;
 422   iface->can_mount = g_unix_volume_can_mount;
 423   iface->can_eject = g_unix_volume_can_eject;
 424   iface->should_automount = g_unix_volume_should_automount;
 425   iface->mount_fn = g_unix_volume_mount;
 426   iface->mount_finish = g_unix_volume_mount_finish;
 427   iface->eject = g_unix_volume_eject;
 428   iface->eject_finish = g_unix_volume_eject_finish;
 429   iface->get_identifier = g_unix_volume_get_identifier;
 430   iface->enumerate_identifiers = g_unix_volume_enumerate_identifiers;
 431 }