gvfs/gvfs-nvvfs.patch

Index: gvfs-1.52.0/daemon/gvfsbackendnvvfs.c
===================================================================
--- /dev/null
+++ gvfs-1.52.0/daemon/gvfsbackendnvvfs.c
@@ -0,0 +1,591 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/* GIO - GLib Input, Output and Streaming Library
+ *
+ * Copyright (C) 2006-2007 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Authors: Alexander Larsson <alexl@redhat.com>
+ *          Cosimo Cecchi <cosimoc@gnome.org>
+ */
+
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+
+#include <glib/gstdio.h>
+#include <glib/gi18n.h>
+#include <gio/gio.h>
+#include <gio/gunixmounts.h>
+#include <glib.h>
+
+#include "gvfsbackendnvvfs.h"
+#include "gvfsmonitor.h"
+#include "gvfsjobopenforread.h"
+#include "gvfsjobread.h"
+#include "gvfsjobseekread.h"
+#include "gvfsjobopenforwrite.h"
+#include "gvfsjobwrite.h"
+#include "gvfsjobclosewrite.h"
+#include "gvfsjobseekwrite.h"
+#include "gvfsjobsetdisplayname.h"
+#include "gvfsjobmountmountable.h"
+#include "gvfsjobqueryinfo.h"
+#include "gvfsjobdelete.h"
+#include "gvfsjobqueryfsinfo.h"
+#include "gvfsjobqueryattributes.h"
+#include "gvfsjobenumerate.h"
+#include "gvfsjobcreatemonitor.h"
+#include "gvfsdaemonprotocol.h"
+
+
+
+typedef struct {
+  char *filename;
+  char *display_name;
+  GIcon *icon;
+  GFile *root;
+  int prio;
+  gboolean can_mount;
+  gboolean can_unmount;
+  gboolean can_eject;
+} NovellNautilus;
+
+static NovellNautilus root = { "/" };
+
+struct _GVfsBackendNvvfs
+{
+  GVfsBackend parent_instance;
+
+  GVolumeMonitor *volume_monitor;
+
+  GVfsMonitor *root_monitor;
+
+  GList *files;
+
+  guint recompute_idle_tag;
+
+  GMountSpec *mount_spec;
+};
+
+G_DEFINE_TYPE (GVfsBackendNvvfs, g_vfs_backend_nvvfs, G_VFS_TYPE_BACKEND)
+
+static void
+nvvfs_file_free (NovellNautilus *file)
+{
+  g_free (file->filename);
+  g_free (file->display_name);
+  if (file->icon)
+    g_object_unref (file->icon);
+  if (file->root)
+    g_object_unref (file->root);
+
+  g_slice_free (NovellNautilus, file);
+}
+
+/* Assumes filename equal */
+static gboolean
+nvvfs_file_equal (NovellNautilus *a,
+                     NovellNautilus *b)
+{
+  if (strcmp (a->display_name, b->display_name) != 0)
+    return FALSE;
+
+  if (!g_icon_equal (a->icon, b->icon))
+    return FALSE;
+
+  if ((a->root != NULL && b->root != NULL &&
+       !g_file_equal (a->root, b->root)) ||
+      (a->root != NULL && b->root == NULL) ||
+      (a->root == NULL && b->root != NULL))
+    return FALSE;
+
+  if (a->prio != b->prio)
+    return FALSE;
+
+  if (a->can_mount != b->can_mount ||
+      a->can_unmount != b->can_unmount ||
+      a->can_eject != b->can_eject)
+    return FALSE;
+
+  return TRUE;
+}
+
+static void object_changed (GVolumeMonitor *monitor,
+                            gpointer object,
+                            GVfsBackendNvvfs *backend);
+
+static void
+g_vfs_backend_nvvfs_finalize (GObject *object)
+{
+  GVfsBackendNvvfs *backend;
+
+  backend = G_VFS_BACKEND_NVVFS (object);
+
+  if (backend->volume_monitor)
+    {
+      g_signal_handlers_disconnect_by_func(backend->volume_monitor, object_changed, backend);
+      g_object_unref (backend->volume_monitor);
+    }
+
+  g_mount_spec_unref (backend->mount_spec);
+
+  if (backend->recompute_idle_tag)
+    {
+      g_source_remove (backend->recompute_idle_tag);
+      backend->recompute_idle_tag = 0;
+    }
+
+  g_object_unref (backend->root_monitor);
+
+  if (G_OBJECT_CLASS (g_vfs_backend_nvvfs_parent_class)->finalize)
+    (*G_OBJECT_CLASS (g_vfs_backend_nvvfs_parent_class)->finalize) (object);
+}
+
+static void
+g_vfs_backend_nvvfs_init (GVfsBackendNvvfs *nvvfs_backend)
+{
+  GVfsBackend *backend = G_VFS_BACKEND (nvvfs_backend);
+  GMountSpec *mount_spec;
+
+  g_vfs_backend_set_display_name (backend, _("Nvvfs"));
+  g_vfs_backend_set_icon_name (backend, "gnome-fs-client");
+  g_vfs_backend_set_user_visible (backend, FALSE);
+
+  mount_spec = g_mount_spec_new ("nvvfs");
+  g_vfs_backend_set_mount_spec (backend, mount_spec);
+  nvvfs_backend->mount_spec = mount_spec;
+}
+
+static gboolean
+filename_is_used (GList *files, const char *filename)
+{
+  NovellNautilus *file;
+
+  while (files != NULL)
+    {
+      file = files->data;
+
+      if (file->filename == NULL)
+        return FALSE;
+
+      if (strcmp (file->filename, filename) == 0)
+        return TRUE;
+
+      files = files->next;
+    }
+  return FALSE;
+}
+
+static int
+sort_file_by_filename (NovellNautilus *a, NovellNautilus *b)
+{
+  return strcmp (a->filename, b->filename);
+}
+
+static void
+convert_slashes (char *str)
+{
+  char *s;
+
+  while ((s = strchr (str, '/')) != NULL)
+    *s = '\\';
+}
+
+static void
+update_from_files (GVfsBackendNvvfs *backend,
+                   GList *files)
+{
+  GList *old_files;
+  GList *oldl, *newl;
+  char *filename;
+  NovellNautilus *old, *new;
+  int cmp;
+
+  old_files = backend->files;
+  backend->files = files;
+
+  /* Generate change events */
+  oldl = old_files;
+  newl = files;
+  while (oldl != NULL || newl != NULL)
+    {
+      if (oldl == NULL)
+        {
+          cmp = 1;
+          new = newl->data;
+          old = NULL;
+        }
+      else if (newl == NULL)
+        {
+          cmp = -1;
+          new = NULL;
+          old = oldl->data;
+        }
+      else
+        {
+          new = newl->data;
+          old = oldl->data;
+          cmp = strcmp (old->filename, new->filename);
+        }
+
+      if (cmp == 0)
+        {
+          if (!nvvfs_file_equal (old, new))
+            {
+              filename = g_strconcat ("/", new->filename, NULL);
+              g_vfs_monitor_emit_event (backend->root_monitor,
+                                        G_FILE_MONITOR_EVENT_CHANGED,
+                                        filename,
+                                        NULL);
+              g_free (filename);
+            }
+
+          oldl = oldl->next;
+          newl = newl->next;
+        }
+      else if (cmp < 0)
+        {
+          filename = g_strconcat ("/", old->filename, NULL);
+          g_vfs_monitor_emit_event (backend->root_monitor,
+                                    G_FILE_MONITOR_EVENT_DELETED,
+                                    filename,
+                                    NULL);
+          g_free (filename);
+          oldl = oldl->next;
+        }
+      else
+        {
+          filename = g_strconcat ("/", new->filename, NULL);
+          g_vfs_monitor_emit_event (backend->root_monitor,
+                                    G_FILE_MONITOR_EVENT_CREATED,
+                                    filename,
+                                    NULL);
+          g_free (filename);
+          newl = newl->next;
+        }
+    }
+
+  g_list_foreach (old_files, (GFunc)nvvfs_file_free, NULL);
+}
+
+static void
+recompute_files (GVfsBackendNvvfs *backend)
+{
+  GVolumeMonitor *volume_monitor;
+  GList *drives, *volumes, *mounts, *l, *ll;
+  GDrive *drive;
+  GVolume *volume;
+  GMount *mount;
+  NovellNautilus *file;
+  GList *files;
+  char *basename, *filename;
+  const char *extension;
+  int uniq;
+
+  gchar *nclmnt_path = "/var/opt/novell/nclmnt/";
+  gchar *user_name=NULL;
+  gchar *path_ncl=NULL;
+
+  volume_monitor = backend->volume_monitor;
+
+  files = NULL;
+
+
+// Im building the path for Novell Client mounts
+  user_name = g_get_user_name();
+  path_ncl = g_strconcat(nclmnt_path,user_name,NULL);
+
+  file = g_slice_new0 (NovellNautilus);
+  file->filename = g_strdup ("root.link");
+  file->display_name = g_strdup (_("Available Connections"));
+  file->icon = g_themed_icon_new("ncl-logo");
+  file->root = g_file_new_for_path (path_ncl);
+  file->prio = 0;
+
+  files = g_list_prepend (files, file);
+
+  file = g_slice_new0 (NovellNautilus);
+  file->filename = g_strdup ("root.lnk");
+  file->display_name = g_strdup (_("All Connections"));
+  file->icon = g_themed_icon_new("ncl-logo");
+  file->root = g_file_new_for_path (path_ncl);
+  file->prio = 0;
+
+  files = g_list_prepend (files, file);
+
+  files = g_list_reverse (files);
+
+  files = g_list_sort (files, (GCompareFunc)sort_file_by_filename);
+
+  update_from_files (backend, files);
+}
+
+static gboolean
+recompute_files_in_idle (GVfsBackendNvvfs *backend)
+{
+  backend->recompute_idle_tag = 0;
+
+  recompute_files (backend);
+
+  return FALSE;
+}
+
+static void
+object_changed (GVolumeMonitor *monitor,
+                gpointer object,
+                GVfsBackendNvvfs *backend)
+{
+  if (backend->recompute_idle_tag == 0)
+    backend->recompute_idle_tag =
+      g_idle_add ((GSourceFunc)recompute_files_in_idle,
+                  backend);
+}
+
+static gboolean
+try_mount (GVfsBackend *backend,
+           GVfsJobMount *job,
+           GMountSpec *mount_spec,
+           GMountSource *mount_source,
+           gboolean is_automount)
+{
+  GVfsBackendNvvfs *nvvfs_backend = G_VFS_BACKEND_NVVFS (backend);
+  int i;
+  char *signals[] = {
+    "volume-added",
+    "volume-removed",
+    "volume-changed",
+    "mount-added",
+    "mount-removed",
+    "mount-changed",
+    "drive-connected",
+    "drive-disconnected",
+    "drive-changed",
+    NULL
+  };
+
+  nvvfs_backend->volume_monitor = g_volume_monitor_get ();
+
+  /* TODO: connect all signals to object_changed */
+
+  for (i = 0; signals[i] != NULL; i++)
+    g_signal_connect_data (nvvfs_backend->volume_monitor,
+                           signals[i],
+                           (GCallback)object_changed,
+                           backend,
+                           NULL, 0);
+
+  nvvfs_backend->root_monitor = g_vfs_monitor_new (backend);
+
+  recompute_files (nvvfs_backend);
+
+  g_vfs_job_succeeded (G_VFS_JOB (job));
+
+  return TRUE;
+}
+
+static NovellNautilus *
+lookup (GVfsBackendNvvfs *backend,
+        GVfsJob *job,
+        const char *filename)
+{
+  GList *l;
+  NovellNautilus *file;
+
+  if (*filename != '/')
+    goto out;
+
+  while (*filename == '/')
+    filename++;
+
+  if (*filename == 0)
+    return &root;
+
+  if (strchr (filename, '/') != NULL)
+    goto out;
+
+  for (l = backend->files; l != NULL; l = l->next)
+    {
+      file = l->data;
+
+      if (strcmp (file->filename, filename) == 0)
+        return file;
+    }
+
+ out:
+  g_vfs_job_failed (job, G_IO_ERROR,
+                    G_IO_ERROR_NOT_FOUND,
+                    _("File doesn't exist"));
+  return NULL;
+}
+
+
+static gboolean
+try_open_for_read (GVfsBackend *backend,
+                   GVfsJobOpenForRead *job,
+                   const char *filename)
+{
+  NovellNautilus *file;
+
+  file = lookup (G_VFS_BACKEND_NVVFS (backend),
+                 G_VFS_JOB (job), filename);
+
+  if (file == &root)
+    g_vfs_job_failed (G_VFS_JOB (job), G_IO_ERROR,
+                      G_IO_ERROR_IS_DIRECTORY,
+                      _("Can't open directory"));
+  else if (file != NULL)
+    g_vfs_job_failed (G_VFS_JOB (job), G_IO_ERROR,
+                      G_IO_ERROR_NOT_SUPPORTED,
+                      _("Can't open mountable file"));
+  return TRUE;
+}
+
+static void
+file_info_from_file (NovellNautilus *file,
+                     GFileInfo *info)
+{
+  char *uri;
+
+  g_file_info_set_name (info, file->filename);
+  g_file_info_set_display_name (info, file->display_name);
+
+  if (file->icon)
+    g_file_info_set_icon (info, file->icon);
+
+  if (file->root)
+    {
+      uri = g_file_get_uri (file->root);
+
+      g_file_info_set_attribute_string (info,
+                                        G_FILE_ATTRIBUTE_STANDARD_TARGET_URI,
+                                        uri);
+      g_free (uri);
+    }
+
+  g_file_info_set_sort_order (info, file->prio);
+
+  g_file_info_set_file_type (info, G_FILE_TYPE_MOUNTABLE);
+  g_file_info_set_attribute_boolean (info, G_FILE_ATTRIBUTE_MOUNTABLE_CAN_MOUNT, file->can_mount);
+  g_file_info_set_attribute_boolean (info, G_FILE_ATTRIBUTE_MOUNTABLE_CAN_UNMOUNT, file->can_unmount);
+  g_file_info_set_attribute_boolean (info, G_FILE_ATTRIBUTE_MOUNTABLE_CAN_EJECT, file->can_eject);
+
+  g_file_info_set_attribute_boolean (info, G_FILE_ATTRIBUTE_ACCESS_CAN_WRITE, FALSE);
+  g_file_info_set_attribute_boolean (info, G_FILE_ATTRIBUTE_ACCESS_CAN_DELETE, FALSE);
+  g_file_info_set_attribute_boolean (info, G_FILE_ATTRIBUTE_ACCESS_CAN_TRASH, FALSE);
+}
+
+static gboolean
+try_enumerate (GVfsBackend *backend,
+               GVfsJobEnumerate *job,
+               const char *filename,
+               GFileAttributeMatcher *attribute_matcher,
+               GFileQueryInfoFlags flags)
+{
+  NovellNautilus *file;
+  GList *l;
+  GFileInfo *info;
+
+  file = lookup (G_VFS_BACKEND_NVVFS (backend),
+                 G_VFS_JOB (job), filename);
+
+  if (file != &root)
+    {
+      if (file != NULL)
+        g_vfs_job_failed (G_VFS_JOB (job), G_IO_ERROR,
+                          G_IO_ERROR_NOT_DIRECTORY,
+                          _("The file is not a directory"));
+      return TRUE;
+    }
+
+  g_vfs_job_succeeded (G_VFS_JOB (job));
+
+  /* Enumerate root */
+  for (l = G_VFS_BACKEND_NVVFS (backend)->files; l != NULL; l = l->next)
+    {
+      file = l->data;
+
+      info = g_file_info_new ();
+
+      file_info_from_file (file, info);
+      g_vfs_job_enumerate_add_info (job, info);
+      g_object_unref (info);
+    }
+
+  g_vfs_job_enumerate_done (job);
+
+  return TRUE;
+}
+
+static gboolean
+try_query_info (GVfsBackend *backend,
+                GVfsJobQueryInfo *job,
+                const char *filename,
+                GFileQueryInfoFlags flags,
+                GFileInfo *info,
+                GFileAttributeMatcher *matcher)
+{
+  NovellNautilus *file;
+
+  file = lookup (G_VFS_BACKEND_NVVFS (backend),
+                 G_VFS_JOB (job), filename);
+
+  if (file == &root)
+    {
+      GIcon *icon;
+
+      g_file_info_set_name (info, "/");
+      g_file_info_set_file_type (info, G_FILE_TYPE_DIRECTORY);
+      g_file_info_set_display_name (info, _("Nvvfs"));
+      icon = g_themed_icon_new ("gnome-fs-client");
+      g_file_info_set_icon (info, icon);
+      g_object_unref (icon);
+      g_file_info_set_attribute_boolean (info, G_FILE_ATTRIBUTE_ACCESS_CAN_WRITE, FALSE);
+      g_file_info_set_attribute_boolean (info, G_FILE_ATTRIBUTE_ACCESS_CAN_DELETE, FALSE);
+      g_file_info_set_attribute_boolean (info, G_FILE_ATTRIBUTE_ACCESS_CAN_TRASH, FALSE);
+      g_file_info_set_content_type (info, "inode/directory");
+
+      g_vfs_job_succeeded (G_VFS_JOB (job));
+    }
+  else if (file != NULL)
+    {
+      file_info_from_file (file, info);
+      g_vfs_job_succeeded (G_VFS_JOB (job));
+    }
+
+  return TRUE;
+}
+
+static void
+g_vfs_backend_nvvfs_class_init (GVfsBackendNvvfsClass *klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+  GVfsBackendClass *backend_class = G_VFS_BACKEND_CLASS (klass);
+
+  gobject_class->finalize = g_vfs_backend_nvvfs_finalize;
+
+  backend_class->try_mount = try_mount;
+  backend_class->try_open_for_read = try_open_for_read;
+  backend_class->try_query_info = try_query_info;
+  backend_class->try_enumerate = try_enumerate;
+}
Index: gvfs-1.52.0/daemon/gvfsbackendnvvfs.h
===================================================================
--- /dev/null
+++ gvfs-1.52.0/daemon/gvfsbackendnvvfs.h
@@ -0,0 +1,50 @@
+/* GIO - GLib Input, Output and Streaming Library
+ *
+ * Copyright (C) 2006-2007 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Author: Alexander Larsson <alexl@redhat.com>
+ */
+
+#ifndef __G_VFS_BACKEND_NVVFS_H__
+#define __G_VFS_BACKEND_NVVFS_H__
+
+#include <gvfsbackend.h>
+#include <gmountspec.h>
+
+G_BEGIN_DECLS
+
+#define G_VFS_TYPE_BACKEND_NVVFS         (g_vfs_backend_nvvfs_get_type ())
+#define G_VFS_BACKEND_NVVFS(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), G_VFS_TYPE_BACKEND_NVVFS, GVfsBackendNvvfs))
+#define G_VFS_BACKEND_NVVFS_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST((k), G_VFS_TYPE_BACKEND_NVVFS, GVfsBackendNvvfsClass))
+#define G_VFS_IS_BACKEND_NVVFS(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_VFS_TYPE_BACKEND_NVVFS))
+#define G_VFS_IS_BACKEND_NVVFS_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE ((k), G_VFS_TYPE_BACKEND_NVVFS))
+#define G_VFS_BACKEND_NVVFS_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_VFS_TYPE_BACKEND_NVVFS, GVfsBackendNvvfsClass))
+
+typedef struct _GVfsBackendNvvfs        GVfsBackendNvvfs;
+typedef struct _GVfsBackendNvvfsClass   GVfsBackendNvvfsClass;
+
+struct _GVfsBackendNvvfsClass
+{
+  GVfsBackendClass parent_class;
+};
+
+GType g_vfs_backend_nvvfs_get_type (void) G_GNUC_CONST;
+
+G_END_DECLS
+
+#endif /* __G_VFS_BACKEND_NVVFS_H__ */
Index: gvfs-1.52.0/daemon/meson.build
===================================================================
--- gvfs-1.52.0.orig/daemon/meson.build
+++ gvfs-1.52.0/daemon/meson.build
@@ -557,6 +557,20 @@ if enable_nfs
   mounts += ['nfs']
 endif
 
+if enable_nvvfs
+  sources = daemon_main_sources + files('gvfsbackendnvvfs.c')
+
+  cflags = [
+      '-DBACKEND_HEADER=gvfsbackendnvvfs.h',
+      '-DDEFAULT_BACKEND_TYPE=nvvfs',
+      '-DBACKEND_TYPES="nvvfs", G_VFS_TYPE_BACKEND_NVVFS,',
+      '-DMA_JOB_THREADS=1',
+  ]
+
+  programs += {'gvfsd-nvvfs': {'sources': sources, 'dependencies': [gio_unix_dep], 'c_args': cflags}}
+  mounts += ['nvvfs']
+endif
+
 foreach program, options: programs
   kwargs = {
     'sources': daemon_main_sources + options.get('sources', []),
Index: gvfs-1.52.0/daemon/nvvfs.mount.in
===================================================================
--- /dev/null
+++ gvfs-1.52.0/daemon/nvvfs.mount.in
@@ -0,0 +1,5 @@
+[Mount]
+Type=nvvfs
+Exec=@libexecdir@/gvfsd-nvvfs
+AutoMount=false
+Scheme=nvvfs
Index: gvfs-1.52.0/meson.build
===================================================================
--- gvfs-1.52.0.orig/meson.build
+++ gvfs-1.52.0/meson.build
@@ -462,6 +462,9 @@ if enable_nfs
   libnfs_dep = dependency('libnfs', version: '>= 1.9.8')
 endif
 
+# *** NVVFS backend ***
+enable_nvvfs = get_option('nvvfs')
+
 # *** SFTP backend ***
 enable_sftp = get_option('sftp')
 
@@ -512,6 +515,7 @@ summary({
   'http': enable_http,
   'mtp': enable_mtp,
   'nds': enable_nds,
+  'nvvfs': enable_nvvfs,
   'nfs': enable_nfs,
   'sftp': enable_sftp,
   'smb': enable_samba,
Index: gvfs-1.52.0/meson_options.txt
===================================================================
--- gvfs-1.52.0.orig/meson_options.txt
+++ gvfs-1.52.0/meson_options.txt
@@ -15,6 +15,7 @@ option('http', type: 'boolean', value: t
 option('mtp', type: 'boolean', value: true, description: 'build with mtp backend and volume monitor')
 option('nds', type: 'boolean', value: true, description: 'build with nds backend')
 option('nfs', type: 'boolean', value: true, description: 'build with nfs backend')
+option('nvvfs', type: 'boolean', value: true, description: 'build with nvvfs backend')
 option('sftp', type: 'boolean', value: true, description: 'build with sftp backend')
 option('smb', type: 'boolean', value: true, description: 'build with smb backends')
 option('udisks2', type: 'boolean', value: true, description: 'build with udisks2 volume monitor')