gio/gunixmount.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 "gunixvolumemonitor.h"
  34 #include "gunixmount.h"
  35 #include "gunixvolume.h"
  36 #include "gmountprivate.h"
  37 #include "gvolumemonitor.h"
  38 #include "gthemedicon.h"
  39 #include "gsimpleasyncresult.h"
  40 #include "glibintl.h"
  41
  42 #include "gioalias.h"
  43
  44 struct _GUnixMount {
  45   GObject parent;
  46
  47   GVolumeMonitor   *volume_monitor;
  48
  49   GUnixVolume      *volume; /* owned by volume monitor */
  50
  51   char *name;
  52   GIcon *icon;
  53   char *device_path;
  54   char *mount_path;
  55
  56   gboolean can_eject;
  57 };
  58
  59 static void g_unix_mount_mount_iface_init (GMountIface *iface);
  60
  61 #define g_unix_mount_get_type _g_unix_mount_get_type
  62 G_DEFINE_TYPE_WITH_CODE (GUnixMount, g_unix_mount, G_TYPE_OBJECT,
  63                          G_IMPLEMENT_INTERFACE (G_TYPE_MOUNT,
  64                                                 g_unix_mount_mount_iface_init))
  65
  66
  67 static void
  68 g_unix_mount_finalize (GObject *object)
  69 {
  70   GUnixMount *mount;
  71
  72   mount = G_UNIX_MOUNT (object);
  73
  74   if (mount->volume_monitor != NULL)
  75     g_object_unref (mount->volume_monitor);
  76
  77   if (mount->volume)
  78     _g_unix_volume_unset_mount (mount->volume, mount);
  79
  80   /* TODO: g_warn_if_fail (volume->volume == NULL); */
  81   g_object_unref (mount->icon);
  82   g_free (mount->name);
  83   g_free (mount->device_path);
  84   g_free (mount->mount_path);
  85
  86   G_OBJECT_CLASS (g_unix_mount_parent_class)->finalize (object);
  87 }
  88
  89 static void
  90 g_unix_mount_class_init (GUnixMountClass *klass)
  91 {
  92   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  93
  94   gobject_class->finalize = g_unix_mount_finalize;
  95 }
  96
  97 static void
  98 g_unix_mount_init (GUnixMount *unix_mount)
  99 {
 100 }
 101
 102 GUnixMount *
 103 _g_unix_mount_new (GVolumeMonitor  *volume_monitor,
 104                    GUnixMountEntry *mount_entry,
 105                    GUnixVolume     *volume)
 106 {
 107   GUnixMount *mount;
 108
 109   /* No volume for mount: Ignore internal things */
 110   if (volume == NULL && !g_unix_mount_guess_should_display (mount_entry))
 111     return NULL;
 112
 113   mount = g_object_new (G_TYPE_UNIX_MOUNT, NULL);
 114   mount->volume_monitor = volume_monitor != NULL ? g_object_ref (volume_monitor) : NULL;
 115   mount->device_path = g_strdup (g_unix_mount_get_device_path (mount_entry));
 116   mount->mount_path = g_strdup (g_unix_mount_get_mount_path (mount_entry));
 117   mount->can_eject = g_unix_mount_guess_can_eject (mount_entry);
 118
 119   mount->name = g_unix_mount_guess_name (mount_entry);
 120   mount->icon = g_unix_mount_guess_icon (mount_entry);
 121
 122   /* need to do this last */
 123   mount->volume = volume;
 124   if (volume != NULL)
 125     _g_unix_volume_set_mount (volume, mount);
 126
 127   return mount;
 128 }
 129
 130 void
 131 _g_unix_mount_unmounted (GUnixMount *mount)
 132 {
 133   if (mount->volume != NULL)
 134     {
 135       _g_unix_volume_unset_mount (mount->volume, mount);
 136       mount->volume = NULL;
 137       g_signal_emit_by_name (mount, "changed");
 138       /* there's really no need to emit mount_changed on the volume monitor
 139        * as we're going to be deleted.. */
 140     }
 141 }
 142
 143 void
 144 _g_unix_mount_unset_volume (GUnixMount *mount,
 145                             GUnixVolume  *volume)
 146 {
 147   if (mount->volume == volume)
 148     {
 149       mount->volume = NULL;
 150       /* TODO: Emit changed in idle to avoid locking issues */
 151       g_signal_emit_by_name (mount, "changed");
 152       if (mount->volume_monitor != NULL)
 153         g_signal_emit_by_name (mount->volume_monitor, "mount_changed", mount);
 154     }
 155 }
 156
 157 static GFile *
 158 g_unix_mount_get_root (GMount *mount)
 159 {
 160   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 161
 162   return g_file_new_for_path (unix_mount->mount_path);
 163 }
 164
 165 static GIcon *
 166 g_unix_mount_get_icon (GMount *mount)
 167 {
 168   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 169
 170   return g_object_ref (unix_mount->icon);
 171 }
 172
 173 static char *
 174 g_unix_mount_get_uuid (GMount *mount)
 175 {
 176   return NULL;
 177 }
 178
 179 static char *
 180 g_unix_mount_get_name (GMount *mount)
 181 {
 182   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 183
 184   return g_strdup (unix_mount->name);
 185 }
 186
 187 gboolean
 188 _g_unix_mount_has_mount_path (GUnixMount *mount,
 189                               const char  *mount_path)
 190 {
 191   return strcmp (mount->mount_path, mount_path) == 0;
 192 }
 193
 194 static GDrive *
 195 g_unix_mount_get_drive (GMount *mount)
 196 {
 197   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 198
 199   if (unix_mount->volume != NULL)
 200     return g_volume_get_drive (G_VOLUME (unix_mount->volume));
 201
 202   return NULL;
 203 }
 204
 205 static GVolume *
 206 g_unix_mount_get_volume (GMount *mount)
 207 {
 208   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 209
 210   if (unix_mount->volume)
 211     return G_VOLUME (g_object_ref (unix_mount->volume));
 212
 213   return NULL;
 214 }
 215
 216 static gboolean
 217 g_unix_mount_can_unmount (GMount *mount)
 218 {
 219   return TRUE;
 220 }
 221
 222 static gboolean
 223 g_unix_mount_can_eject (GMount *mount)
 224 {
 225   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 226   return unix_mount->can_eject;
 227 }
 228
 229
 230 typedef struct {
 231   GUnixMount *unix_mount;
 232   GAsyncReadyCallback callback;
 233   gpointer user_data;
 234   GCancellable *cancellable;
 235   int error_fd;
 236   GIOChannel *error_channel;
 237   guint error_channel_source_id;
 238   GString *error_string;
 239 } UnmountEjectOp;
 240
 241 static void
 242 eject_unmount_cb (GPid pid, gint status, gpointer user_data)
 243 {
 244   UnmountEjectOp *data = user_data;
 245   GSimpleAsyncResult *simple;
 246
 247   if (WEXITSTATUS (status) != 0)
 248     {
 249       GError *error;
 250       error = g_error_new_literal (G_IO_ERROR,
 251                                    G_IO_ERROR_FAILED,
 252                                    data->error_string->str);
 253       simple = g_simple_async_result_new_from_error (G_OBJECT (data->unix_mount),
 254                                                      data->callback,
 255                                                      data->user_data,
 256                                                      error);
 257       g_error_free (error);
 258     }
 259   else
 260     {
 261       simple = g_simple_async_result_new (G_OBJECT (data->unix_mount),
 262                                           data->callback,
 263                                           data->user_data,
 264                                           NULL);
 265     }
 266
 267   g_simple_async_result_complete (simple);
 268   g_object_unref (simple);
 269
 270   g_source_remove (data->error_channel_source_id);
 271   g_io_channel_unref (data->error_channel);
 272   g_string_free (data->error_string, TRUE);
 273   close (data->error_fd);
 274   g_spawn_close_pid (pid);
 275   g_free (data);
 276 }
 277
 278 static gboolean
 279 eject_unmount_read_error (GIOChannel *channel,
 280                     GIOCondition condition,
 281                     gpointer user_data)
 282 {
 283   char *str;
 284   gsize str_len;
 285   UnmountEjectOp *data = user_data;
 286
 287   g_io_channel_read_to_end (channel, &str, &str_len, NULL);
 288   g_string_append (data->error_string, str);
 289   g_free (str);
 290   return TRUE;
 291 }
 292
 293 static void
 294 eject_unmount_do (GMount              *mount,
 295                   GCancellable        *cancellable,
 296                   GAsyncReadyCallback  callback,
 297                   gpointer             user_data,
 298                   char               **argv)
 299 {
 300   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 301   UnmountEjectOp *data;
 302   GPid child_pid;
 303   GError *error;
 304
 305   data = g_new0 (UnmountEjectOp, 1);
 306   data->unix_mount = unix_mount;
 307   data->callback = callback;
 308   data->user_data = user_data;
 309   data->cancellable = cancellable;
 310
 311   error = NULL;
 312   if (!g_spawn_async_with_pipes (NULL,         /* working dir */
 313                                  argv,
 314                                  NULL,         /* envp */
 315                                  G_SPAWN_DO_NOT_REAP_CHILD|G_SPAWN_SEARCH_PATH,
 316                                  NULL,         /* child_setup */
 317                                  NULL,         /* user_data for child_setup */
 318                                  &child_pid,
 319                                  NULL,           /* standard_input */
 320                                  NULL,           /* standard_output */
 321                                  &(data->error_fd),
 322                                  &error)) {
 323     GSimpleAsyncResult *simple;
 324     simple = g_simple_async_result_new_from_error (G_OBJECT (data->unix_mount),
 325                                                    data->callback,
 326                                                    data->user_data,
 327                                                    error);
 328     g_simple_async_result_complete (simple);
 329     g_object_unref (simple);
 330     g_error_free (error);
 331     g_free (data);
 332     return;
 333   }
 334   data->error_string = g_string_new ("");
 335   data->error_channel = g_io_channel_unix_new (data->error_fd);
 336   data->error_channel_source_id = g_io_add_watch (data->error_channel, G_IO_IN, eject_unmount_read_error, data);
 337   g_child_watch_add (child_pid, eject_unmount_cb, data);
 338 }
 339
 340 static void
 341 g_unix_mount_unmount (GMount             *mount,
 342                       GMountUnmountFlags flags,
 343                       GCancellable        *cancellable,
 344                       GAsyncReadyCallback  callback,
 345                       gpointer             user_data)
 346 {
 347   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 348   char *argv[] = {"umount", NULL, NULL};
 349
 350   if (unix_mount->mount_path != NULL)
 351     argv[1] = unix_mount->mount_path;
 352   else
 353     argv[1] = unix_mount->device_path;
 354
 355   eject_unmount_do (mount, cancellable, callback, user_data, argv);
 356 }
 357
 358 static gboolean
 359 g_unix_mount_unmount_finish (GMount       *mount,
 360                              GAsyncResult  *result,
 361                              GError       **error)
 362 {
 363   return TRUE;
 364 }
 365
 366 static void
 367 g_unix_mount_eject (GMount             *mount,
 368                     GMountUnmountFlags flags,
 369                     GCancellable        *cancellable,
 370                     GAsyncReadyCallback  callback,
 371                     gpointer             user_data)
 372 {
 373   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 374   char *argv[] = {"eject", NULL, NULL};
 375
 376   if (unix_mount->mount_path != NULL)
 377     argv[1] = unix_mount->mount_path;
 378   else
 379     argv[1] = unix_mount->device_path;
 380
 381   eject_unmount_do (mount, cancellable, callback, user_data, argv);
 382 }
 383
 384 static gboolean
 385 g_unix_mount_eject_finish (GMount       *mount,
 386                            GAsyncResult  *result,
 387                            GError       **error)
 388 {
 389   return TRUE;
 390 }
 391
 392 static void
 393 g_unix_mount_mount_iface_init (GMountIface *iface)
 394 {
 395   iface->get_root = g_unix_mount_get_root;
 396   iface->get_name = g_unix_mount_get_name;
 397   iface->get_icon = g_unix_mount_get_icon;
 398   iface->get_uuid = g_unix_mount_get_uuid;
 399   iface->get_drive = g_unix_mount_get_drive;
 400   iface->get_volume = g_unix_mount_get_volume;
 401   iface->can_unmount = g_unix_mount_can_unmount;
 402   iface->can_eject = g_unix_mount_can_eject;
 403   iface->unmount = g_unix_mount_unmount;
 404   iface->unmount_finish = g_unix_mount_unmount_finish;
 405   iface->eject = g_unix_mount_eject;
 406   iface->eject_finish = g_unix_mount_eject_finish;
 407 }