Merge branch 'wip/oholy/trashing-locations2' into 'master'

Resubmit of reverted trash related changes and tests

See merge request GNOME/glib!83

gio/glocalfile.c

@@ -1677,16 +1677,20 @@ find_mountpoint_for (const char *file,
     }
 }
 
-char *
-_g_local_file_find_topdir_for (const char *file)
+static char *
+_g_local_file_find_topdir_for_internal (const char *file, dev_t file_dev)
 {
   char *dir;
   char *mountpoint = NULL;
   dev_t dir_dev;
 
   dir = get_parent (file, &dir_dev);
-  if (dir == NULL)
-    return NULL;
+  if (dir == NULL || dir_dev != file_dev)
+    {
+      g_free (dir);
+
+      return NULL;
+    }
 
   mountpoint = find_mountpoint_for (dir, dir_dev);
   g_free (dir);
@@ -1694,6 +1698,17 @@ _g_local_file_find_topdir_for (const char *file)
   return mountpoint;
 }
 
+char *
+_g_local_file_find_topdir_for (const char *file)
+{
+  GStatBuf file_stat;
+
+  if (g_lstat (file, &file_stat) != 0)
+    return NULL;
+
+  return _g_local_file_find_topdir_for_internal (file, file_stat.st_dev);
+}
+
 static char *
 get_unique_filename (const char *basename, 
                      int         id)
@@ -1769,6 +1784,7 @@ _g_local_file_has_trash_dir (const char *dirname, dev_t dir_dev)
   char uid_str[32];
   GStatBuf global_stat, trash_stat;
   gboolean res;
+  GUnixMountEntry *mount;
 
   if (g_once_init_enter (&home_dev_set))
     {
@@ -1787,6 +1803,16 @@ _g_local_file_has_trash_dir (const char *dirname, dev_t dir_dev)
   if (topdir == NULL)
     return FALSE;
 
+  mount = g_unix_mount_at (topdir, NULL);
+  if (mount == NULL || g_unix_mount_is_system_internal (mount))
+    {
+      g_clear_pointer (&mount, g_unix_mount_free);
+
+      return FALSE;
+    }
+
+  g_clear_pointer (&mount, g_unix_mount_free);
+
   globaldir = g_build_filename (topdir, ".Trash", NULL);
   if (g_lstat (globaldir, &global_stat) == 0 &&
       S_ISDIR (global_stat.st_mode) &&
@@ -1930,19 +1956,35 @@ g_local_file_trash (GFile         *file,
     {
       uid_t uid;
       char uid_str[32];
+      GUnixMountEntry *mount;
 
       uid = geteuid ();
       g_snprintf (uid_str, sizeof (uid_str), "%lu", (unsigned long)uid);
 
-      topdir = _g_local_file_find_topdir_for (local->filename);
+      topdir = _g_local_file_find_topdir_for_internal (local->filename,
+                                                       file_stat.st_dev);
       if (topdir == NULL)
 	{
           g_set_io_error (error,
                           _("Unable to find toplevel directory to trash %s"),
-                          file, G_IO_ERROR_NOT_SUPPORTED);
+                          file, ENOTSUP);
 	  return FALSE;
 	}
-      
+
+      mount = g_unix_mount_at (topdir, NULL);
+      if (mount == NULL || g_unix_mount_is_system_internal (mount))
+        {
+          g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
+                       _("Trashing on system internal mounts is not supported"));
+
+          g_clear_pointer (&mount, g_unix_mount_free);
+          g_free (topdir);
+
+          return FALSE;
+        }
+
+      g_clear_pointer (&mount, g_unix_mount_free);
+
       /* Try looking for global trash dir $topdir/.Trash/$uid */
       globaldir = g_build_filename (topdir, ".Trash", NULL);
       if (g_lstat (globaldir, &global_stat) == 0 &&

gio/glocalfileinfo.c

@@ -924,9 +924,13 @@ get_access_rights (GFileAttributeMatcher *attribute_matcher,
 	_g_file_info_set_attribute_boolean_by_id (info, G_FILE_ATTRIBUTE_ID_ACCESS_CAN_DELETE,
 					         writable);
 
+      /* Trashing is supported only if the parent device is the same */
       if (_g_file_attribute_matcher_matches_id (attribute_matcher, G_FILE_ATTRIBUTE_ID_ACCESS_CAN_TRASH))
-        _g_file_info_set_attribute_boolean_by_id (info, G_FILE_ATTRIBUTE_ID_ACCESS_CAN_TRASH,
-                                                 writable && parent_info->has_trash_dir);
+        _g_file_info_set_attribute_boolean_by_id (info,
+                                                  G_FILE_ATTRIBUTE_ID_ACCESS_CAN_TRASH,
+                                                  writable &&
+                                                  parent_info->has_trash_dir &&
+                                                  parent_info->device == statbuf->st_dev);
     }
 }
 

gio/tests/Makefile.am

@@ -273,6 +273,7 @@ test_programs += \
 	unix-mounts				\
 	unix-streams				\
 	g-file-info-filesystem-readonly		\
+	trash					\
 	$(NULL)
 
 test_extra_programs += \

gio/tests/meson.build

@@ -123,6 +123,7 @@ if host_machine.system() != 'windows'
     'unix-streams',
     'g-file-info-filesystem-readonly',
     'gschema-compile',
+    'trash',
   ]
 
   # Uninstalled because of the check-for-executable logic in DesktopAppInfo

gio/tests/trash.c

@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2018 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 2.1 of the
+ * licence, or (at your option) any later version.
+ *
+ * This 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <glib.h>
+
+#ifndef G_OS_UNIX
+#error This is a Unix-specific test
+#endif
+
+#include <glib/gstdio.h>
+#include <gio/gio.h>
+#include <gio/gunixmounts.h>
+
+/* Test that g_file_trash() returns G_IO_ERROR_NOT_SUPPORTED for files on system mounts. */
+static void
+test_trash_not_supported (void)
+{
+  GFile *file;
+  GFileIOStream *stream;
+  GUnixMountEntry *mount;
+  GFileInfo *info;
+  GError *error = NULL;
+  gboolean ret;
+  GStatBuf file_stat, home_stat;
+
+  /* The test assumes that tmp file is located on system internal mount. */
+  file = g_file_new_tmp ("test-trashXXXXXX", &stream, &error);
+  g_assert_no_error (error);
+  g_assert_cmpint (g_lstat (g_file_peek_path (file), &file_stat), ==, 0);
+  g_test_message ("File: %s (dev: %lu)", g_file_peek_path (file), file_stat.st_dev);
+
+  g_assert_cmpint (g_stat (g_get_home_dir (), &home_stat), ==, 0);
+  g_test_message ("Home: %s (dev: %lu)", g_get_home_dir (), home_stat.st_dev);
+
+  if (file_stat.st_dev == home_stat.st_dev)
+    {
+      g_test_skip ("The file has to be on another filesystem than the home trash to run this test");
+
+      g_object_unref (stream);
+      g_object_unref (file);
+
+      return;
+    }
+
+  mount = g_unix_mount_for (g_file_peek_path (file), NULL);
+  g_assert_true (mount == NULL || g_unix_mount_is_system_internal (mount));
+  g_test_message ("Mount: %s", (mount != NULL) ? g_unix_mount_get_mount_path (mount) : "(null)");
+  g_clear_pointer (&mount, g_unix_mount_free);
+
+  /* g_file_trash() shouldn't be supported on system internal mounts,
+   * because those are not monitored by gvfsd-trash.
+   */
+  ret = g_file_trash (file, NULL, &error);
+  g_assert_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED);
+  g_test_message ("Error: %s", error->message);
+  g_assert_false (ret);
+  g_clear_error (&error);
+
+  info = g_file_query_info (file,
+                            G_FILE_ATTRIBUTE_ACCESS_CAN_TRASH,
+                            G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
+                            NULL,
+                            &error);
+  g_assert_no_error (error);
+
+  g_assert_false (g_file_info_get_attribute_boolean (info,
+                                                     G_FILE_ATTRIBUTE_ACCESS_CAN_TRASH));
+
+  g_io_stream_close (G_IO_STREAM (stream), NULL, &error);
+  g_assert_no_error (error);
+
+  g_object_unref (info);
+  g_object_unref (stream);
+  g_object_unref (file);
+}
+
+int
+main (int argc, char *argv[])
+{
+  g_test_init (&argc, &argv, NULL);
+
+  g_test_bug_base ("htps://gitlab.gnome.org/GNOME/glib/issues/");
+  g_test_bug ("251");
+
+  g_test_add_func ("/trash/not-supported", test_trash_not_supported);
+
+  return g_test_run ();
+}
+