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 "gunixmounts.h"
  36 #include "gunixvolume.h"
  37 #include "gmountprivate.h"
  38 #include "gmount.h"
  39 #include "gfile.h"
  40 #include "gvolumemonitor.h"
  41 #include "gthemedicon.h"
  42 #include "gsimpleasyncresult.h"
  43 #include "gioerror.h"
  44 #include "glibintl.h"
  45 /* for BUFSIZ */
  46 #include <stdio.h>
  47
  48
  49 struct _GUnixMount {
  50   GObject parent;
  51
  52   GVolumeMonitor   *volume_monitor;
  53
  54   GUnixVolume      *volume; /* owned by volume monitor */
  55
  56   char *name;
  57   GIcon *icon;
  58   GIcon *symbolic_icon;
  59   char *device_path;
  60   char *mount_path;
  61
  62   gboolean can_eject;
  63 };
  64
  65 static void g_unix_mount_mount_iface_init (GMountIface *iface);
  66
  67 #define g_unix_mount_get_type _g_unix_mount_get_type
  68 G_DEFINE_TYPE_WITH_CODE (GUnixMount, g_unix_mount, G_TYPE_OBJECT,
  69                          G_IMPLEMENT_INTERFACE (G_TYPE_MOUNT,
  70                                                 g_unix_mount_mount_iface_init))
  71
  72
  73 static void
  74 g_unix_mount_finalize (GObject *object)
  75 {
  76   GUnixMount *mount;
  77
  78   mount = G_UNIX_MOUNT (object);
  79
  80   if (mount->volume_monitor != NULL)
  81     g_object_unref (mount->volume_monitor);
  82
  83   if (mount->volume)
  84     _g_unix_volume_unset_mount (mount->volume, mount);
  85
  86   /* TODO: g_warn_if_fail (volume->volume == NULL); */
  87   g_object_unref (mount->icon);
  88   g_object_unref (mount->symbolic_icon);
  89   g_free (mount->name);
  90   g_free (mount->device_path);
  91   g_free (mount->mount_path);
  92
  93   G_OBJECT_CLASS (g_unix_mount_parent_class)->finalize (object);
  94 }
  95
  96 static void
  97 g_unix_mount_class_init (GUnixMountClass *klass)
  98 {
  99   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 100
 101   gobject_class->finalize = g_unix_mount_finalize;
 102 }
 103
 104 static void
 105 g_unix_mount_init (GUnixMount *unix_mount)
 106 {
 107 }
 108
 109 GUnixMount *
 110 _g_unix_mount_new (GVolumeMonitor  *volume_monitor,
 111                    GUnixMountEntry *mount_entry,
 112                    GUnixVolume     *volume)
 113 {
 114   GUnixMount *mount;
 115
 116   /* No volume for mount: Ignore internal things */
 117   if (volume == NULL && !g_unix_mount_guess_should_display (mount_entry))
 118     return NULL;
 119
 120   mount = g_object_new (G_TYPE_UNIX_MOUNT, NULL);
 121   mount->volume_monitor = volume_monitor != NULL ? g_object_ref (volume_monitor) : NULL;
 122   mount->device_path = g_strdup (g_unix_mount_get_device_path (mount_entry));
 123   mount->mount_path = g_strdup (g_unix_mount_get_mount_path (mount_entry));
 124   mount->can_eject = g_unix_mount_guess_can_eject (mount_entry);
 125
 126   mount->name = g_unix_mount_guess_name (mount_entry);
 127   mount->icon = g_unix_mount_guess_icon (mount_entry);
 128   mount->symbolic_icon = g_unix_mount_guess_symbolic_icon (mount_entry);
 129
 130   /* need to do this last */
 131   mount->volume = volume;
 132   if (volume != NULL)
 133     _g_unix_volume_set_mount (volume, mount);
 134
 135   return mount;
 136 }
 137
 138 void
 139 _g_unix_mount_unmounted (GUnixMount *mount)
 140 {
 141   if (mount->volume != NULL)
 142     {
 143       _g_unix_volume_unset_mount (mount->volume, mount);
 144       mount->volume = NULL;
 145       g_signal_emit_by_name (mount, "changed");
 146       /* there's really no need to emit mount_changed on the volume monitor
 147        * as we're going to be deleted.. */
 148     }
 149 }
 150
 151 void
 152 _g_unix_mount_unset_volume (GUnixMount *mount,
 153                             GUnixVolume  *volume)
 154 {
 155   if (mount->volume == volume)
 156     {
 157       mount->volume = NULL;
 158       /* TODO: Emit changed in idle to avoid locking issues */
 159       g_signal_emit_by_name (mount, "changed");
 160       if (mount->volume_monitor != NULL)
 161         g_signal_emit_by_name (mount->volume_monitor, "mount-changed", mount);
 162     }
 163 }
 164
 165 static GFile *
 166 g_unix_mount_get_root (GMount *mount)
 167 {
 168   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 169
 170   return g_file_new_for_path (unix_mount->mount_path);
 171 }
 172
 173 static GIcon *
 174 g_unix_mount_get_icon (GMount *mount)
 175 {
 176   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 177
 178   return g_object_ref (unix_mount->icon);
 179 }
 180
 181 static GIcon *
 182 g_unix_mount_get_symbolic_icon (GMount *mount)
 183 {
 184   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 185
 186   return g_object_ref (unix_mount->symbolic_icon);
 187 }
 188
 189 static char *
 190 g_unix_mount_get_uuid (GMount *mount)
 191 {
 192   return NULL;
 193 }
 194
 195 static char *
 196 g_unix_mount_get_name (GMount *mount)
 197 {
 198   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 199
 200   return g_strdup (unix_mount->name);
 201 }
 202
 203 gboolean
 204 _g_unix_mount_has_mount_path (GUnixMount *mount,
 205                               const char  *mount_path)
 206 {
 207   return strcmp (mount->mount_path, mount_path) == 0;
 208 }
 209
 210 static GDrive *
 211 g_unix_mount_get_drive (GMount *mount)
 212 {
 213   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 214
 215   if (unix_mount->volume != NULL)
 216     return g_volume_get_drive (G_VOLUME (unix_mount->volume));
 217
 218   return NULL;
 219 }
 220
 221 static GVolume *
 222 g_unix_mount_get_volume (GMount *mount)
 223 {
 224   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 225
 226   if (unix_mount->volume)
 227     return G_VOLUME (g_object_ref (unix_mount->volume));
 228
 229   return NULL;
 230 }
 231
 232 static gboolean
 233 g_unix_mount_can_unmount (GMount *mount)
 234 {
 235   return TRUE;
 236 }
 237
 238 static gboolean
 239 g_unix_mount_can_eject (GMount *mount)
 240 {
 241   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 242   return unix_mount->can_eject;
 243 }
 244
 245
 246 typedef struct {
 247   GUnixMount *unix_mount;
 248   int error_fd;
 249   GIOChannel *error_channel;
 250   GSource *error_channel_source;
 251   GString *error_string;
 252   gchar **argv;
 253 } UnmountEjectOp;
 254
 255 static void
 256 unmount_eject_op_free (UnmountEjectOp *data)
 257 {
 258   if (data->error_channel_source)
 259     {
 260       g_source_destroy (data->error_channel_source);
 261       g_source_unref (data->error_channel_source);
 262     }
 263   g_io_channel_unref (data->error_channel);
 264   g_string_free (data->error_string, TRUE);
 265   g_strfreev (data->argv);
 266   close (data->error_fd);
 267   g_free (data);
 268 }
 269
 270 static void
 271 eject_unmount_cb (GPid pid, gint status, gpointer user_data)
 272 {
 273   GTask *task = user_data;
 274   UnmountEjectOp *data = g_task_get_task_data (task);
 275
 276   if (g_task_return_error_if_cancelled (task))
 277     return;
 278
 279   g_spawn_close_pid (pid);
 280
 281   if (WEXITSTATUS (status) != 0)
 282     {
 283       g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED,
 284                                "%s", data->error_string->str);
 285     }
 286   else
 287     g_task_return_boolean (task, TRUE);
 288
 289   g_object_unref (task);
 290 }
 291
 292 static gboolean
 293 eject_unmount_read_error (GIOChannel *channel,
 294                           GIOCondition condition,
 295                           gpointer user_data)
 296 {
 297   GTask *task = user_data;
 298   UnmountEjectOp *data = g_task_get_task_data (task);
 299   char buf[BUFSIZ];
 300   gsize bytes_read;
 301   GError *error;
 302   GIOStatus status;
 303
 304   if (g_task_return_error_if_cancelled (task))
 305     return FALSE;
 306
 307   error = NULL;
 308 read:
 309   status = g_io_channel_read_chars (channel, buf, sizeof (buf), &bytes_read, &error);
 310   if (status == G_IO_STATUS_NORMAL)
 311    {
 312      g_string_append_len (data->error_string, buf, bytes_read);
 313      if (bytes_read == sizeof (buf))
 314         goto read;
 315    }
 316   else if (status == G_IO_STATUS_EOF)
 317     g_string_append_len (data->error_string, buf, bytes_read);
 318   else if (status == G_IO_STATUS_ERROR)
 319     {
 320       if (data->error_string->len > 0)
 321         g_string_append (data->error_string, "\n");
 322
 323       g_string_append (data->error_string, error->message);
 324       g_error_free (error);
 325
 326       if (data->error_channel_source)
 327         {
 328           g_source_unref (data->error_channel_source);
 329           data->error_channel_source = NULL;
 330         }
 331       return FALSE;
 332     }
 333
 334   return TRUE;
 335 }
 336
 337 static gboolean
 338 eject_unmount_do_cb (gpointer user_data)
 339 {
 340   GTask *task = user_data;
 341   UnmountEjectOp *data = g_task_get_task_data (task);
 342   GPid child_pid;
 343   GSource *child_watch;
 344   GError *error = NULL;
 345
 346   if (g_task_return_error_if_cancelled (task))
 347     return G_SOURCE_REMOVE;
 348
 349   if (!g_spawn_async_with_pipes (NULL,         /* working dir */
 350                                  data->argv,
 351                                  NULL,         /* envp */
 352                                  G_SPAWN_DO_NOT_REAP_CHILD|G_SPAWN_SEARCH_PATH,
 353                                  NULL,         /* child_setup */
 354                                  NULL,         /* user_data for child_setup */
 355                                  &child_pid,
 356                                  NULL,           /* standard_input */
 357                                  NULL,           /* standard_output */
 358                                  &(data->error_fd),
 359                                  &error)) {
 360     g_assert (error != NULL);
 361     goto handle_error;
 362   }
 363
 364   data->error_string = g_string_new ("");
 365
 366   data->error_channel = g_io_channel_unix_new (data->error_fd);
 367   g_io_channel_set_flags (data->error_channel, G_IO_FLAG_NONBLOCK, &error);
 368   if (error != NULL)
 369     goto handle_error;
 370
 371   data->error_channel_source = g_io_create_watch (data->error_channel, G_IO_IN);
 372   g_task_attach_source (task, data->error_channel_source,
 373                         (GSourceFunc) eject_unmount_read_error);
 374
 375   child_watch = g_child_watch_source_new (child_pid);
 376   g_task_attach_source (task, data->error_channel_source,
 377                         (GSourceFunc) eject_unmount_cb);
 378   g_source_unref (child_watch);
 379
 380 handle_error:
 381   if (error != NULL)
 382     {
 383       g_task_return_error (task, error);
 384       g_object_unref (task);
 385     }
 386
 387   return G_SOURCE_REMOVE;
 388 }
 389
 390 static void
 391 eject_unmount_do (GMount              *mount,
 392                   GCancellable        *cancellable,
 393                   GAsyncReadyCallback  callback,
 394                   gpointer             user_data,
 395                   char               **argv)
 396 {
 397   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 398   UnmountEjectOp *data;
 399   GTask *task;
 400   GSource *timeout;
 401
 402   data = g_new0 (UnmountEjectOp, 1);
 403   data->argv = g_strdupv (argv);
 404
 405   task = g_task_new (mount, cancellable, callback, user_data);
 406   g_task_set_task_data (task, data, (GDestroyNotify)unmount_eject_op_free);
 407
 408   if (unix_mount->volume_monitor != NULL)
 409     g_signal_emit_by_name (unix_mount->volume_monitor, "mount-pre-unmount", mount);
 410
 411   g_signal_emit_by_name (mount, "pre-unmount", 0);
 412
 413   timeout = g_timeout_source_new (500);
 414   g_task_attach_source (task, timeout, (GSourceFunc) eject_unmount_do_cb);
 415   g_source_unref (timeout);
 416 }
 417
 418 static void
 419 g_unix_mount_unmount (GMount             *mount,
 420                       GMountUnmountFlags flags,
 421                       GCancellable        *cancellable,
 422                       GAsyncReadyCallback  callback,
 423                       gpointer             user_data)
 424 {
 425   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 426   char *argv[] = {"umount", NULL, NULL};
 427
 428   if (unix_mount->mount_path != NULL)
 429     argv[1] = unix_mount->mount_path;
 430   else
 431     argv[1] = unix_mount->device_path;
 432
 433   eject_unmount_do (mount, cancellable, callback, user_data, argv);
 434 }
 435
 436 static gboolean
 437 g_unix_mount_unmount_finish (GMount       *mount,
 438                              GAsyncResult  *result,
 439                              GError       **error)
 440 {
 441   return g_task_propagate_boolean (G_TASK (result), error);
 442 }
 443
 444 static void
 445 g_unix_mount_eject (GMount             *mount,
 446                     GMountUnmountFlags flags,
 447                     GCancellable        *cancellable,
 448                     GAsyncReadyCallback  callback,
 449                     gpointer             user_data)
 450 {
 451   GUnixMount *unix_mount = G_UNIX_MOUNT (mount);
 452   char *argv[] = {"eject", NULL, NULL};
 453
 454   if (unix_mount->mount_path != NULL)
 455     argv[1] = unix_mount->mount_path;
 456   else
 457     argv[1] = unix_mount->device_path;
 458
 459   eject_unmount_do (mount, cancellable, callback, user_data, argv);
 460 }
 461
 462 static gboolean
 463 g_unix_mount_eject_finish (GMount       *mount,
 464                            GAsyncResult  *result,
 465                            GError       **error)
 466 {
 467   return g_task_propagate_boolean (G_TASK (result), error);
 468 }
 469
 470 static void
 471 g_unix_mount_mount_iface_init (GMountIface *iface)
 472 {
 473   iface->get_root = g_unix_mount_get_root;
 474   iface->get_name = g_unix_mount_get_name;
 475   iface->get_icon = g_unix_mount_get_icon;
 476   iface->get_symbolic_icon = g_unix_mount_get_symbolic_icon;
 477   iface->get_uuid = g_unix_mount_get_uuid;
 478   iface->get_drive = g_unix_mount_get_drive;
 479   iface->get_volume = g_unix_mount_get_volume;
 480   iface->can_unmount = g_unix_mount_can_unmount;
 481   iface->can_eject = g_unix_mount_can_eject;
 482   iface->unmount = g_unix_mount_unmount;
 483   iface->unmount_finish = g_unix_mount_unmount_finish;
 484   iface->eject = g_unix_mount_eject;
 485   iface->eject_finish = g_unix_mount_eject_finish;
 486 }