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  * SPDX-License-Identifier: LGPL-2.1-or-later
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General
  20  * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
  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 (G_MOUNT (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 static void
 271 eject_mount_done (GObject      *source,
 272                   GAsyncResult *result,
 273                   gpointer      user_data)
 274 {
 275   GSubprocess *subprocess = G_SUBPROCESS (source);
 276   GTask *task = user_data;
 277   GError *error = NULL;
 278   gchar *stderr_str;
 279   GUnixVolume *unix_volume;
 280
 281   if (!g_subprocess_communicate_utf8_finish (subprocess, result, NULL, &stderr_str, &error))
 282     {
 283       g_task_return_error (task, error);
 284       g_error_free (error);
 285     }
 286   else /* successful communication */
 287     {
 288       if (!g_subprocess_get_successful (subprocess))
 289         /* ...but bad exit code */
 290         g_task_return_new_error_literal (task, G_IO_ERROR, G_IO_ERROR_FAILED, stderr_str);
 291       else
 292         {
 293           /* ...and successful exit code */
 294           unix_volume = G_UNIX_VOLUME (g_task_get_source_object (task));
 295           _g_unix_volume_monitor_update (G_UNIX_VOLUME_MONITOR (unix_volume->volume_monitor));
 296           g_task_return_boolean (task, TRUE);
 297         }
 298
 299       g_free (stderr_str);
 300     }
 301
 302   g_object_unref (task);
 303 }
 304
 305 static void
 306 eject_mount_do (GVolume              *volume,
 307                 GCancellable         *cancellable,
 308                 GAsyncReadyCallback   callback,
 309                 gpointer              user_data,
 310                 const gchar * const  *argv,
 311                 const gchar          *task_name)
 312 {
 313   GSubprocess *subprocess;
 314   GError *error = NULL;
 315   GTask *task;
 316
 317   task = g_task_new (volume, cancellable, callback, user_data);
 318   g_task_set_source_tag (task, eject_mount_do);
 319   g_task_set_name (task, task_name);
 320
 321   if (g_task_return_error_if_cancelled (task))
 322     {
 323       g_object_unref (task);
 324       return;
 325     }
 326
 327   subprocess = g_subprocess_newv (argv, G_SUBPROCESS_FLAGS_STDOUT_SILENCE | G_SUBPROCESS_FLAGS_STDERR_PIPE, &error);
 328   g_assert_no_error (error);
 329
 330   g_subprocess_communicate_utf8_async (subprocess, NULL,
 331                                        g_task_get_cancellable (task),
 332                                        eject_mount_done, task);
 333 }
 334
 335 static void
 336 g_unix_volume_mount (GVolume            *volume,
 337                      GMountMountFlags    flags,
 338                      GMountOperation     *mount_operation,
 339                      GCancellable        *cancellable,
 340                      GAsyncReadyCallback  callback,
 341                      gpointer             user_data)
 342 {
 343   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 344   const gchar *argv[] = { "mount", NULL, NULL };
 345
 346   if (unix_volume->mount_path != NULL)
 347     argv[1] = unix_volume->mount_path;
 348   else
 349     argv[1] = unix_volume->device_path;
 350
 351   eject_mount_do (volume, cancellable, callback, user_data, argv, "[gio] mount volume");
 352 }
 353
 354 static gboolean
 355 g_unix_volume_mount_finish (GVolume        *volume,
 356                             GAsyncResult  *result,
 357                             GError       **error)
 358 {
 359   g_return_val_if_fail (g_task_is_valid (result, volume), FALSE);
 360
 361   return g_task_propagate_boolean (G_TASK (result), error);
 362 }
 363
 364 static void
 365 g_unix_volume_eject (GVolume             *volume,
 366                      GMountUnmountFlags   flags,
 367                      GCancellable        *cancellable,
 368                      GAsyncReadyCallback  callback,
 369                      gpointer             user_data)
 370 {
 371   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 372   const gchar *argv[] = { "eject", NULL, NULL };
 373
 374   argv[1] = unix_volume->device_path;
 375
 376   eject_mount_do (volume, cancellable, callback, user_data, argv, "[gio] eject volume");
 377 }
 378
 379 static gboolean
 380 g_unix_volume_eject_finish (GVolume       *volume,
 381                             GAsyncResult  *result,
 382                             GError       **error)
 383 {
 384   g_return_val_if_fail (g_task_is_valid (result, volume), FALSE);
 385
 386   return g_task_propagate_boolean (G_TASK (result), error);
 387 }
 388
 389 static gchar *
 390 g_unix_volume_get_identifier (GVolume     *volume,
 391                               const gchar *kind)
 392 {
 393   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 394
 395   if (unix_volume->identifier_type != NULL &&
 396       strcmp (kind, unix_volume->identifier_type) == 0)
 397     return g_strdup (unix_volume->identifier);
 398
 399   return NULL;
 400 }
 401
 402 static gchar **
 403 g_unix_volume_enumerate_identifiers (GVolume *volume)
 404 {
 405   GUnixVolume *unix_volume = G_UNIX_VOLUME (volume);
 406   gchar **res;
 407
 408   if (unix_volume->identifier_type)
 409     {
 410       res = g_new (gchar *, 2);
 411       res[0] = g_strdup (unix_volume->identifier_type);
 412       res[1] = NULL;
 413     }
 414   else
 415     {
 416       res = g_new (gchar *, 1);
 417       res[0] = NULL;
 418     }
 419
 420   return res;
 421 }
 422
 423 static void
 424 g_unix_volume_volume_iface_init (GVolumeIface *iface)
 425 {
 426   iface->get_name = g_unix_volume_get_name;
 427   iface->get_icon = g_unix_volume_get_icon;
 428   iface->get_symbolic_icon = g_unix_volume_get_symbolic_icon;
 429   iface->get_uuid = g_unix_volume_get_uuid;
 430   iface->get_drive = g_unix_volume_get_drive;
 431   iface->get_mount = g_unix_volume_get_mount;
 432   iface->can_mount = g_unix_volume_can_mount;
 433   iface->can_eject = g_unix_volume_can_eject;
 434   iface->should_automount = g_unix_volume_should_automount;
 435   iface->mount_fn = g_unix_volume_mount;
 436   iface->mount_finish = g_unix_volume_mount_finish;
 437   iface->eject = g_unix_volume_eject;
 438   iface->eject_finish = g_unix_volume_eject_finish;
 439   iface->get_identifier = g_unix_volume_get_identifier;
 440   iface->enumerate_identifiers = g_unix_volume_enumerate_identifiers;
 441 }