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