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 "gsimpleasyncresult.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   GAsyncReadyCallback callback;
 274   gpointer user_data;
 275   GCancellable *cancellable;
 276   int error_fd;
 277   GIOChannel *error_channel;
 278   GSource *error_channel_source;
 279   GString *error_string;
 280 } EjectMountOp;
 281
 282 static void
 283 eject_mount_cb (GPid     pid,
 284                 gint     status,
 285                 gpointer user_data)
 286 {
 287   EjectMountOp *data = user_data;
 288   GSimpleAsyncResult *simple;
 289
 290   if (WEXITSTATUS (status) != 0)
 291     {
 292       GError *error;
 293       error = g_error_new_literal (G_IO_ERROR,
 294                                    G_IO_ERROR_FAILED,
 295                                    data->error_string->str);
 296       simple = g_simple_async_result_new_from_error (G_OBJECT (data->unix_volume),
 297                                                      data->callback,
 298                                                      data->user_data,
 299                                                      error);
 300       g_error_free (error);
 301     }
 302   else
 303     {
 304       simple = g_simple_async_result_new (G_OBJECT (data->unix_volume),
 305                                           data->callback,
 306                                           data->user_data,
 307                                           NULL);
 308     }
 309
 310   g_simple_async_result_complete (simple);
 311   g_object_unref (simple);
 312
 313   if (data->error_channel_source)
 314     {
 315       g_source_destroy (data->error_channel_source);
 316       g_source_unref (data->error_channel_source);
 317     }
 318   g_io_channel_unref (data->error_channel);
 319   g_string_free (data->error_string, TRUE);
 320   close (data->error_fd);
 321   g_spawn_close_pid (pid);
 322   g_free (data);
 323 }
 324
 325 static gboolean
 326 eject_mount_read_error (GIOChannel   *channel,
 327                         GIOCondition  condition,
 328                         gpointer      user_data)
 329 {
 330   EjectMountOp *data = user_data;
 331   char buf[BUFSIZ];
 332   gsize bytes_read;
 333   GError *error;
 334   GIOStatus status;
 335
 336   error = NULL;
 337 read:
 338   status = g_io_channel_read_chars (channel, buf, sizeof (buf), &bytes_read, &error);
 339   if (status == G_IO_STATUS_NORMAL)
 340    {
 341      g_string_append_len (data->error_string, buf, bytes_read);
 342      if (bytes_read == sizeof (buf))
 343         goto read;
 344    }
 345   else if (status == G_IO_STATUS_EOF)
 346     g_string_append_len (data->error_string, buf, bytes_read);
 347   else if (status == G_IO_STATUS_ERROR)
 348     {
 349       if (data->error_string->len > 0)
 350         g_string_append (data->error_string, "\n");
 351
 352       g_string_append (data->error_string, error->message);
 353       g_error_free (error);
 354
 355       if (data->error_channel_source)
 356         {
 357           g_source_unref (data->error_channel_source);
 358           data->error_channel_source = NULL;
 359         }
 360       return FALSE;
 361     }
 362
 363   return TRUE;
 364 }
 365
 366 static void
 367 eject_mount_do (GVolume             *volume,
 368                 GCancellable        *cancellable,
 369                 GAsyncReadyCallback  callback,
 370                 gpointer             user_data,
 371                 char               **argv)
 372 {
 373   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 374   EjectMountOp *data;
 375   GPid child_pid;
 376   GSource *child_watch;
 377   GError *error;
 378
 379   data = g_new0 (EjectMountOp, 1);
 380   data->unix_volume = unix_volume;
 381   data->callback = callback;
 382   data->user_data = user_data;
 383   data->cancellable = cancellable;
 384
 385   error = NULL;
 386   if (!g_spawn_async_with_pipes (NULL,         /* working dir */
 387                                  argv,
 388                                  NULL,         /* envp */
 389                                  G_SPAWN_DO_NOT_REAP_CHILD|G_SPAWN_SEARCH_PATH,
 390                                  NULL,         /* child_setup */
 391                                  NULL,         /* user_data for child_setup */
 392                                  &child_pid,
 393                                  NULL,           /* standard_input */
 394                                  NULL,           /* standard_output */
 395                                  &(data->error_fd),
 396                                  &error))
 397     {
 398       g_assert (error != NULL);
 399       goto handle_error;
 400     }
 401
 402   data->error_string = g_string_new ("");
 403
 404   data->error_channel = g_io_channel_unix_new (data->error_fd);
 405   g_io_channel_set_flags (data->error_channel, G_IO_FLAG_NONBLOCK, &error);
 406   if (error != NULL)
 407     goto handle_error;
 408
 409   data->error_channel_source = g_io_create_watch (data->error_channel, G_IO_IN);
 410   g_source_set_callback (data->error_channel_source,
 411                          (GSourceFunc) eject_mount_read_error, data, NULL);
 412   g_source_attach (data->error_channel_source, g_main_context_get_thread_default ());
 413
 414   child_watch = g_child_watch_source_new (child_pid);
 415   g_source_set_callback (child_watch, (GSourceFunc) eject_mount_cb, data, NULL);
 416   g_source_attach (child_watch, g_main_context_get_thread_default ());
 417   g_source_unref (child_watch);
 418
 419 handle_error:
 420   if (error != NULL)
 421     {
 422       GSimpleAsyncResult *simple;
 423       simple = g_simple_async_result_new_take_error (G_OBJECT (data->unix_volume),
 424                                                      data->callback,
 425                                                      data->user_data,
 426                                                      error);
 427       g_simple_async_result_complete (simple);
 428       g_object_unref (simple);
 429
 430       if (data->error_string != NULL)
 431         g_string_free (data->error_string, TRUE);
 432
 433       if (data->error_channel != NULL)
 434         g_io_channel_unref (data->error_channel);
 435
 436       g_free (data);
 437     }
 438 }
 439
 440
 441 static void
 442 g_unix_volume_mount (GVolume            *volume,
 443                      GMountMountFlags    flags,
 444                      GMountOperation     *mount_operation,
 445                      GCancellable        *cancellable,
 446                      GAsyncReadyCallback  callback,
 447                      gpointer             user_data)
 448 {
 449   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 450   char *argv[] = { "mount", NULL, NULL };
 451
 452   if (unix_volume->mount_path != NULL)
 453     argv[1] = unix_volume->mount_path;
 454   else
 455     argv[1] = unix_volume->device_path;
 456
 457   eject_mount_do (volume, cancellable, callback, user_data, argv);
 458 }
 459
 460 static gboolean
 461 g_unix_volume_mount_finish (GVolume        *volume,
 462                             GAsyncResult  *result,
 463                             GError       **error)
 464 {
 465   return TRUE;
 466 }
 467
 468 static void
 469 g_unix_volume_eject (GVolume             *volume,
 470                      GMountUnmountFlags   flags,
 471                      GCancellable        *cancellable,
 472                      GAsyncReadyCallback  callback,
 473                      gpointer             user_data)
 474 {
 475   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 476   char *argv[] = { "eject", NULL, NULL };
 477
 478   argv[1] = unix_volume->device_path;
 479
 480   eject_mount_do (volume, cancellable, callback, user_data, argv);
 481 }
 482
 483 static gboolean
 484 g_unix_volume_eject_finish (GVolume       *volume,
 485                             GAsyncResult  *result,
 486                             GError       **error)
 487 {
 488   return TRUE;
 489 }
 490
 491 static gchar *
 492 g_unix_volume_get_identifier (GVolume     *volume,
 493                               const gchar *kind)
 494 {
 495   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 496
 497   if (unix_volume->identifier_type != NULL &&
 498       strcmp (kind, unix_volume->identifier_type) == 0)
 499     return g_strdup (unix_volume->identifier);
 500
 501   return NULL;
 502 }
 503
 504 static gchar **
 505 g_unix_volume_enumerate_identifiers (GVolume *volume)
 506 {
 507   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 508   gchar **res;
 509
 510   if (unix_volume->identifier_type)
 511     {
 512       res = g_new (gchar *, 2);
 513       res[0] = g_strdup (unix_volume->identifier_type);
 514       res[1] = NULL;
 515     }
 516   else
 517     {
 518       res = g_new (gchar *, 1);
 519       res[0] = NULL;
 520     }
 521
 522   return res;
 523 }
 524
 525 static void
 526 g_unix_volume_volume_iface_init (GVolumeIface *iface)
 527 {
 528   iface->get_name = g_unix_volume_get_name;
 529   iface->get_icon = g_unix_volume_get_icon;
 530   iface->get_symbolic_icon = g_unix_volume_get_symbolic_icon;
 531   iface->get_uuid = g_unix_volume_get_uuid;
 532   iface->get_drive = g_unix_volume_get_drive;
 533   iface->get_mount = g_unix_volume_get_mount;
 534   iface->can_mount = g_unix_volume_can_mount;
 535   iface->can_eject = g_unix_volume_can_eject;
 536   iface->should_automount = g_unix_volume_should_automount;
 537   iface->mount_fn = g_unix_volume_mount;
 538   iface->mount_finish = g_unix_volume_mount_finish;
 539   iface->eject = g_unix_volume_eject;
 540   iface->eject_finish = g_unix_volume_eject_finish;
 541   iface->get_identifier = g_unix_volume_get_identifier;
 542   iface->enumerate_identifiers = g_unix_volume_enumerate_identifiers;
 543 }