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, write to the
  19  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20  * Boston, MA 02111-1307, USA.
  21  *
  22  * Author: Alexander Larsson <alexl@redhat.com>
  23  *         David Zeuthen <davidz@redhat.com>
  24  */
  25
  26 #include "config.h"
  27
  28 #include <string.h>
  29 #include <sys/wait.h>
  30 #include <unistd.h>
  31
  32 #include <glib.h>
  33 #include "gunixvolume.h"
  34 #include "gunixmount.h"
  35 #include "gunixmounts.h"
  36 #include "gthemedicon.h"
  37 #include "gvolume.h"
  38 #include "gvolumemonitor.h"
  39 #include "gtask.h"
  40 #include "gioerror.h"
  41 #include "glibintl.h"
  42 /* for BUFSIZ */
  43 #include <stdio.h>
  44
  45
  46 struct _GUnixVolume {
  47   GObject parent;
  48
  49   GVolumeMonitor *volume_monitor;
  50   GUnixMount     *mount; /* owned by volume monitor */
  51
  52   char *device_path;
  53   char *mount_path;
  54   gboolean can_eject;
  55
  56   char *identifier;
  57   char *identifier_type;
  58
  59   char *name;
  60   GIcon *icon;
  61   GIcon *symbolic_icon;
  62 };
  63
  64 static void g_unix_volume_volume_iface_init (GVolumeIface *iface);
  65
  66 #define g_unix_volume_get_type _g_unix_volume_get_type
  67 G_DEFINE_TYPE_WITH_CODE (GUnixVolume, g_unix_volume, G_TYPE_OBJECT,
  68                          G_IMPLEMENT_INTERFACE (G_TYPE_VOLUME,
  69                                                 g_unix_volume_volume_iface_init))
  70
  71 static void
  72 g_unix_volume_finalize (GObject *object)
  73 {
  74   GUnixVolume *volume;
  75
  76   volume = G_UNIX_VOLUME (object);
  77
  78   if (volume->volume_monitor != NULL)
  79     g_object_unref (volume->volume_monitor);
  80
  81   if (volume->mount)
  82     _g_unix_mount_unset_volume (volume->mount, volume);
  83
  84   g_object_unref (volume->icon);
  85   g_object_unref (volume->symbolic_icon);
  86   g_free (volume->name);
  87   g_free (volume->mount_path);
  88   g_free (volume->device_path);
  89   g_free (volume->identifier);
  90   g_free (volume->identifier_type);
  91
  92   G_OBJECT_CLASS (g_unix_volume_parent_class)->finalize (object);
  93 }
  94
  95 static void
  96 g_unix_volume_class_init (GUnixVolumeClass *klass)
  97 {
  98   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  99
 100   gobject_class->finalize = g_unix_volume_finalize;
 101 }
 102
 103 static void
 104 g_unix_volume_init (GUnixVolume *unix_volume)
 105 {
 106 }
 107
 108 GUnixVolume *
 109 _g_unix_volume_new (GVolumeMonitor  *volume_monitor,
 110                     GUnixMountPoint *mountpoint)
 111 {
 112   GUnixVolume *volume;
 113
 114   if (!(g_unix_mount_point_is_user_mountable (mountpoint) ||
 115         g_str_has_prefix (g_unix_mount_point_get_device_path (mountpoint), "/vol/")) ||
 116       g_unix_mount_point_is_loopback (mountpoint))
 117     return NULL;
 118
 119   volume = g_object_new (G_TYPE_UNIX_VOLUME, NULL);
 120   volume->volume_monitor = volume_monitor != NULL ? g_object_ref (volume_monitor) : NULL;
 121   volume->mount_path = g_strdup (g_unix_mount_point_get_mount_path (mountpoint));
 122   volume->device_path = g_strdup (g_unix_mount_point_get_device_path (mountpoint));
 123   volume->can_eject = g_unix_mount_point_guess_can_eject (mountpoint);
 124
 125   volume->name = g_unix_mount_point_guess_name (mountpoint);
 126   volume->icon = g_unix_mount_point_guess_icon (mountpoint);
 127   volume->symbolic_icon = g_unix_mount_point_guess_symbolic_icon (mountpoint);
 128
 129
 130   if (strcmp (g_unix_mount_point_get_fs_type (mountpoint), "nfs") == 0)
 131     {
 132       volume->identifier_type = g_strdup (G_VOLUME_IDENTIFIER_KIND_NFS_MOUNT);
 133       volume->identifier = g_strdup (volume->device_path);
 134     }
 135   else if (g_str_has_prefix (volume->device_path, "LABEL="))
 136     {
 137       volume->identifier_type = g_strdup (G_VOLUME_IDENTIFIER_KIND_LABEL);
 138       volume->identifier = g_strdup (volume->device_path + 6);
 139     }
 140   else if (g_str_has_prefix (volume->device_path, "UUID="))
 141     {
 142       volume->identifier_type = g_strdup (G_VOLUME_IDENTIFIER_KIND_UUID);
 143       volume->identifier = g_strdup (volume->device_path + 5);
 144     }
 145   else if (g_path_is_absolute (volume->device_path))
 146     {
 147       volume->identifier_type = g_strdup (G_VOLUME_IDENTIFIER_KIND_UNIX_DEVICE);
 148       volume->identifier = g_strdup (volume->device_path);
 149     }
 150
 151   return volume;
 152 }
 153
 154 void
 155 _g_unix_volume_disconnected (GUnixVolume *volume)
 156 {
 157   if (volume->mount)
 158     {
 159       _g_unix_mount_unset_volume (volume->mount, volume);
 160       volume->mount = NULL;
 161     }
 162 }
 163
 164 void
 165 _g_unix_volume_set_mount (GUnixVolume *volume,
 166                           GUnixMount  *mount)
 167 {
 168   if (volume->mount == mount)
 169     return;
 170
 171   if (volume->mount)
 172     _g_unix_mount_unset_volume (volume->mount, volume);
 173
 174   volume->mount = mount;
 175
 176   /* TODO: Emit changed in idle to avoid locking issues */
 177   g_signal_emit_by_name (volume, "changed");
 178   if (volume->volume_monitor != NULL)
 179     g_signal_emit_by_name (volume->volume_monitor, "volume-changed", volume);
 180 }
 181
 182 void
 183 _g_unix_volume_unset_mount (GUnixVolume  *volume,
 184                             GUnixMount *mount)
 185 {
 186   if (volume->mount == mount)
 187     {
 188       volume->mount = NULL;
 189       /* TODO: Emit changed in idle to avoid locking issues */
 190       g_signal_emit_by_name (volume, "changed");
 191       if (volume->volume_monitor != NULL)
 192         g_signal_emit_by_name (volume->volume_monitor, "volume-changed", volume);
 193     }
 194 }
 195
 196 static GIcon *
 197 g_unix_volume_get_icon (GVolume *volume)
 198 {
 199   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 200   return g_object_ref (unix_volume->icon);
 201 }
 202
 203 static GIcon *
 204 g_unix_volume_get_symbolic_icon (GVolume *volume)
 205 {
 206   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 207   return g_object_ref (unix_volume->symbolic_icon);
 208 }
 209
 210 static char *
 211 g_unix_volume_get_name (GVolume *volume)
 212 {
 213   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 214   return g_strdup (unix_volume->name);
 215 }
 216
 217 static char *
 218 g_unix_volume_get_uuid (GVolume *volume)
 219 {
 220   return NULL;
 221 }
 222
 223 static gboolean
 224 g_unix_volume_can_mount (GVolume *volume)
 225 {
 226   return TRUE;
 227 }
 228
 229 static gboolean
 230 g_unix_volume_can_eject (GVolume *volume)
 231 {
 232   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 233   return unix_volume->can_eject;
 234 }
 235
 236 static gboolean
 237 g_unix_volume_should_automount (GVolume *volume)
 238 {
 239   /* We automount all local volumes because we don't even
 240    * make the internal stuff visible
 241    */
 242   return TRUE;
 243 }
 244
 245 static GDrive *
 246 g_unix_volume_get_drive (GVolume *volume)
 247 {
 248   return NULL;
 249 }
 250
 251 static GMount *
 252 g_unix_volume_get_mount (GVolume *volume)
 253 {
 254   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 255
 256   if (unix_volume->mount != NULL)
 257     return g_object_ref (unix_volume->mount);
 258
 259   return NULL;
 260 }
 261
 262
 263 gboolean
 264 _g_unix_volume_has_mount_path (GUnixVolume *volume,
 265                                const char  *mount_path)
 266 {
 267   return strcmp (volume->mount_path, mount_path) == 0;
 268 }
 269
 270
 271 typedef struct {
 272   GUnixVolume *unix_volume;
 273   int error_fd;
 274   GIOChannel *error_channel;
 275   GSource *error_channel_source;
 276   GString *error_string;
 277 } EjectMountOp;
 278
 279 static void
 280 eject_mount_op_free (EjectMountOp *data)
 281 {
 282   if (data->error_string != NULL)
 283     g_string_free (data->error_string, TRUE);
 284
 285   if (data->error_channel != NULL)
 286     g_io_channel_unref (data->error_channel);
 287
 288   if (data->error_channel_source)
 289     {
 290       g_source_destroy (data->error_channel_source);
 291       g_source_unref (data->error_channel_source);
 292     }
 293
 294   if (data->error_fd != -1)
 295     close (data->error_fd);
 296
 297   g_free (data);
 298 }
 299
 300 static void
 301 eject_mount_cb (GPid     pid,
 302                 gint     status,
 303                 gpointer user_data)
 304 {
 305   GTask *task = user_data;
 306   EjectMountOp *data = g_task_get_task_data (task);
 307
 308   if (WEXITSTATUS (status) != 0)
 309     {
 310       g_task_return_new_error (task,
 311                                G_IO_ERROR,
 312                                G_IO_ERROR_FAILED,
 313                                "%s", data->error_string->str);
 314     }
 315   else
 316     g_task_return_boolean (task, TRUE);
 317   g_object_unref (task);
 318 }
 319
 320 static gboolean
 321 eject_mount_read_error (GIOChannel   *channel,
 322                         GIOCondition  condition,
 323                         gpointer      user_data)
 324 {
 325   GTask *task = user_data;
 326   EjectMountOp *data = g_task_get_task_data (task);
 327   char buf[BUFSIZ];
 328   gsize bytes_read;
 329   GError *error;
 330   GIOStatus status;
 331
 332   error = NULL;
 333 read:
 334   status = g_io_channel_read_chars (channel, buf, sizeof (buf), &bytes_read, &error);
 335   if (status == G_IO_STATUS_NORMAL)
 336    {
 337      g_string_append_len (data->error_string, buf, bytes_read);
 338      if (bytes_read == sizeof (buf))
 339         goto read;
 340    }
 341   else if (status == G_IO_STATUS_EOF)
 342     g_string_append_len (data->error_string, buf, bytes_read);
 343   else if (status == G_IO_STATUS_ERROR)
 344     {
 345       if (data->error_string->len > 0)
 346         g_string_append (data->error_string, "\n");
 347
 348       g_string_append (data->error_string, error->message);
 349       g_error_free (error);
 350
 351       if (data->error_channel_source)
 352         {
 353           g_source_unref (data->error_channel_source);
 354           data->error_channel_source = NULL;
 355         }
 356       return FALSE;
 357     }
 358
 359   return TRUE;
 360 }
 361
 362 static void
 363 eject_mount_do (GVolume             *volume,
 364                 GCancellable        *cancellable,
 365                 GAsyncReadyCallback  callback,
 366                 gpointer             user_data,
 367                 char               **argv)
 368 {
 369   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 370   GTask *task;
 371   EjectMountOp *data;
 372   GPid child_pid;
 373   GSource *child_watch;
 374   GError *error;
 375
 376   data = g_new0 (EjectMountOp, 1);
 377   data->unix_volume = unix_volume;
 378   data->error_fd = -1;
 379
 380   task = g_task_new (unix_volume, cancellable, callback, user_data);
 381   g_task_set_task_data (task, data, (GDestroyNotify) eject_mount_op_free);
 382
 383   error = NULL;
 384   if (!g_spawn_async_with_pipes (NULL,         /* working dir */
 385                                  argv,
 386                                  NULL,         /* envp */
 387                                  G_SPAWN_DO_NOT_REAP_CHILD|G_SPAWN_SEARCH_PATH,
 388                                  NULL,         /* child_setup */
 389                                  NULL,         /* user_data for child_setup */
 390                                  &child_pid,
 391                                  NULL,           /* standard_input */
 392                                  NULL,           /* standard_output */
 393                                  &(data->error_fd),
 394                                  &error))
 395     {
 396       g_assert (error != NULL);
 397       goto handle_error;
 398     }
 399
 400   data->error_string = g_string_new ("");
 401
 402   data->error_channel = g_io_channel_unix_new (data->error_fd);
 403   g_io_channel_set_flags (data->error_channel, G_IO_FLAG_NONBLOCK, &error);
 404   if (error != NULL)
 405     goto handle_error;
 406
 407   data->error_channel_source = g_io_create_watch (data->error_channel, G_IO_IN);
 408   g_task_attach_source (task, data->error_channel_source,
 409                         (GSourceFunc) eject_mount_read_error);
 410
 411   child_watch = g_child_watch_source_new (child_pid);
 412   g_task_attach_source (task, child_watch, (GSourceFunc) eject_mount_cb);
 413   g_source_unref (child_watch);
 414
 415 handle_error:
 416   if (error != NULL)
 417     {
 418       g_task_return_error (task, error);
 419       g_object_unref (task);
 420     }
 421 }
 422
 423
 424 static void
 425 g_unix_volume_mount (GVolume            *volume,
 426                      GMountMountFlags    flags,
 427                      GMountOperation     *mount_operation,
 428                      GCancellable        *cancellable,
 429                      GAsyncReadyCallback  callback,
 430                      gpointer             user_data)
 431 {
 432   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 433   char *argv[] = { "mount", NULL, NULL };
 434
 435   if (unix_volume->mount_path != NULL)
 436     argv[1] = unix_volume->mount_path;
 437   else
 438     argv[1] = unix_volume->device_path;
 439
 440   eject_mount_do (volume, cancellable, callback, user_data, argv);
 441 }
 442
 443 static gboolean
 444 g_unix_volume_mount_finish (GVolume        *volume,
 445                             GAsyncResult  *result,
 446                             GError       **error)
 447 {
 448   return TRUE;
 449 }
 450
 451 static void
 452 g_unix_volume_eject (GVolume             *volume,
 453                      GMountUnmountFlags   flags,
 454                      GCancellable        *cancellable,
 455                      GAsyncReadyCallback  callback,
 456                      gpointer             user_data)
 457 {
 458   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 459   char *argv[] = { "eject", NULL, NULL };
 460
 461   argv[1] = unix_volume->device_path;
 462
 463   eject_mount_do (volume, cancellable, callback, user_data, argv);
 464 }
 465
 466 static gboolean
 467 g_unix_volume_eject_finish (GVolume       *volume,
 468                             GAsyncResult  *result,
 469                             GError       **error)
 470 {
 471   return TRUE;
 472 }
 473
 474 static gchar *
 475 g_unix_volume_get_identifier (GVolume     *volume,
 476                               const gchar *kind)
 477 {
 478   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 479
 480   if (unix_volume->identifier_type != NULL &&
 481       strcmp (kind, unix_volume->identifier_type) == 0)
 482     return g_strdup (unix_volume->identifier);
 483
 484   return NULL;
 485 }
 486
 487 static gchar **
 488 g_unix_volume_enumerate_identifiers (GVolume *volume)
 489 {
 490   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 491   gchar **res;
 492
 493   if (unix_volume->identifier_type)
 494     {
 495       res = g_new (gchar *, 2);
 496       res[0] = g_strdup (unix_volume->identifier_type);
 497       res[1] = NULL;
 498     }
 499   else
 500     {
 501       res = g_new (gchar *, 1);
 502       res[0] = NULL;
 503     }
 504
 505   return res;
 506 }
 507
 508 static void
 509 g_unix_volume_volume_iface_init (GVolumeIface *iface)
 510 {
 511   iface->get_name = g_unix_volume_get_name;
 512   iface->get_icon = g_unix_volume_get_icon;
 513   iface->get_symbolic_icon = g_unix_volume_get_symbolic_icon;
 514   iface->get_uuid = g_unix_volume_get_uuid;
 515   iface->get_drive = g_unix_volume_get_drive;
 516   iface->get_mount = g_unix_volume_get_mount;
 517   iface->can_mount = g_unix_volume_can_mount;
 518   iface->can_eject = g_unix_volume_can_eject;
 519   iface->should_automount = g_unix_volume_should_automount;
 520   iface->mount_fn = g_unix_volume_mount;
 521   iface->mount_finish = g_unix_volume_mount_finish;
 522   iface->eject = g_unix_volume_eject;
 523   iface->eject_finish = g_unix_volume_eject_finish;
 524   iface->get_identifier = g_unix_volume_get_identifier;
 525   iface->enumerate_identifiers = g_unix_volume_enumerate_identifiers;
 526 }