Import Upstream version 2.72.4

gio/tests/g-file-info-filesystem-readonly.c

@@ -0,0 +1,273 @@
+/* Testcase for bug in GIO function g_file_query_filesystem_info()
+ * Author: Nelson Benítez León
+ *
+ * This work is provided "as is"; redistribution and modification
+ * in whole or in part, in any medium, physical or electronic is
+ * permitted without restriction.
+ *
+ * This work 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.
+ *
+ * In no event shall the authors or contributors be liable for any
+ * direct, indirect, incidental, special, exemplary, or consequential
+ * damages (including, but not limited to, procurement of substitute
+ * goods or services; loss of use, data, or profits; or business
+ * interruption) however caused and on any theory of liability, whether
+ * in contract, strict liability, or tort (including negligence or
+ * otherwise) arising in any way out of the use of this software, even
+ * if advised of the possibility of such damage.
+ */
+
+#include <errno.h>
+#include <glib.h>
+#include <glib/gstdio.h>
+#include <gio/gio.h>
+#include <gio/gunixmounts.h>
+
+static gboolean
+run (GError **error,
+     const gchar *argv0,
+     ...)
+{
+  GPtrArray *args;
+  const gchar *arg;
+  va_list ap;
+  GSubprocess *subprocess;
+  gchar *command_line = NULL;
+  gboolean success;
+
+  args = g_ptr_array_new ();
+
+  va_start (ap, argv0);
+  g_ptr_array_add (args, (gchar *) argv0);
+  while ((arg = va_arg (ap, const gchar *)))
+    g_ptr_array_add (args, (gchar *) arg);
+  g_ptr_array_add (args, NULL);
+  va_end (ap);
+
+  command_line = g_strjoinv (" ", (gchar **) args->pdata);
+  g_test_message ("Running command `%s`", command_line);
+  g_free (command_line);
+
+  subprocess = g_subprocess_newv ((const gchar * const *) args->pdata, G_SUBPROCESS_FLAGS_NONE, error);
+  g_ptr_array_free (args, TRUE);
+
+  if (subprocess == NULL)
+    return FALSE;
+
+  success = g_subprocess_wait_check (subprocess, NULL, error);
+  g_object_unref (subprocess);
+
+  return success;
+}
+
+static void
+assert_remove (const gchar *file)
+{
+  if (g_remove (file) != 0)
+    g_error ("failed to remove %s: %s", file, g_strerror (errno));
+}
+
+static gboolean
+fuse_module_loaded (void)
+{
+  char *contents = NULL;
+  gboolean ret;
+
+  if (!g_file_get_contents ("/proc/modules", &contents, NULL, NULL) ||
+      contents == NULL)
+    {
+      g_free (contents);
+      return FALSE;
+    }
+
+  ret = (strstr (contents, "\nfuse ") != NULL);
+  g_free (contents);
+  return ret;
+}
+
+static void
+test_filesystem_readonly (gconstpointer with_mount_monitor)
+{
+  GFileInfo *file_info;
+  GFile *mounted_file;
+  GUnixMountMonitor *mount_monitor = NULL;
+  gchar *bindfs, *fusermount;
+  gchar *curdir, *dir_to_mount, *dir_mountpoint;
+  gchar *file_in_mount, *file_in_mountpoint;
+  GError *error = NULL;
+
+  /* installed by package 'bindfs' in Fedora */
+  bindfs = g_find_program_in_path ("bindfs");
+
+  /* installed by package 'fuse' in Fedora */
+  fusermount = g_find_program_in_path ("fusermount");
+
+  if (bindfs == NULL || fusermount == NULL)
+    {
+      /* We need these because "mount --bind" requires root privileges */
+      g_test_skip ("'bindfs' and 'fusermount' commands are needed to run this test");
+      g_free (fusermount);
+      g_free (bindfs);
+      return;
+    }
+
+  /* If the fuse module is loaded but there's no /dev/fuse, then we're
+   * we're probably in a rootless container and won't be able to
+   * use bindfs to run our tests */
+  if (fuse_module_loaded () &&
+      !g_file_test ("/dev/fuse", G_FILE_TEST_EXISTS))
+    {
+      g_test_skip ("fuse support is needed to run this test (rootless container?)");
+      g_free (fusermount);
+      g_free (bindfs);
+      return;
+    }
+
+  curdir = g_get_current_dir ();
+  dir_to_mount = g_strdup_printf ("%s/dir_bindfs_to_mount", curdir);
+  file_in_mount = g_strdup_printf ("%s/example.txt", dir_to_mount);
+  dir_mountpoint = g_strdup_printf ("%s/dir_bindfs_mountpoint", curdir);
+
+  g_mkdir (dir_to_mount, 0777);
+  g_mkdir (dir_mountpoint, 0777);
+  if (! g_file_set_contents (file_in_mount, "Example", -1, NULL))
+    {
+      g_test_skip ("Failed to create file needed to proceed further with the test");
+
+      g_free (dir_mountpoint);
+      g_free (file_in_mount);
+      g_free (dir_to_mount);
+      g_free (curdir);
+      g_free (fusermount);
+      g_free (bindfs);
+      return;
+    }
+
+  if (with_mount_monitor)
+    mount_monitor = g_unix_mount_monitor_get ();
+
+  /* Use bindfs, which does not need root privileges, to mount the contents of one dir
+   * into another dir (and do the mount as readonly as per passed '-o ro' option) */
+  if (!run (&error, bindfs, "-n", "-o", "ro", dir_to_mount, dir_mountpoint, NULL))
+    {
+      gchar *skip_message = g_strdup_printf ("Failed to run bindfs to set up test: %s", error->message);
+      g_test_skip (skip_message);
+
+      g_free (skip_message);
+      g_clear_error (&error);
+
+      g_clear_object (&mount_monitor);
+      g_free (dir_mountpoint);
+      g_free (file_in_mount);
+      g_free (dir_to_mount);
+      g_free (curdir);
+      g_free (fusermount);
+      g_free (bindfs);
+
+      return;
+    }
+
+  /* Let's check now, that the file is in indeed in a readonly filesystem */
+  file_in_mountpoint = g_strdup_printf ("%s/example.txt", dir_mountpoint);
+  mounted_file = g_file_new_for_path (file_in_mountpoint);
+
+  if (with_mount_monitor)
+    {
+     /* Let UnixMountMonitor process its 'mounts-changed'
+      * signal triggered by mount operation above */
+      while (g_main_context_iteration (NULL, FALSE));
+    }
+
+  file_info = g_file_query_filesystem_info (mounted_file,
+                                            G_FILE_ATTRIBUTE_FILESYSTEM_READONLY, NULL, &error);
+  g_assert_no_error (error);
+  g_assert_nonnull (file_info);
+  if (! g_file_info_get_attribute_boolean (file_info, G_FILE_ATTRIBUTE_FILESYSTEM_READONLY))
+    {
+      g_test_skip ("Failed to create readonly file needed to proceed further with the test");
+
+      g_clear_object (&file_info);
+      g_clear_object (&mounted_file);
+      g_free (file_in_mountpoint);
+      g_clear_object (&mount_monitor);
+      g_free (dir_mountpoint);
+      g_free (file_in_mount);
+      g_free (dir_to_mount);
+      g_free (curdir);
+      g_free (fusermount);
+      g_free (bindfs);
+
+      return;
+    }
+
+  /* Now we unmount, and mount again but this time rw (not readonly) */
+  run (&error, fusermount, "-z", "-u", dir_mountpoint, NULL);
+  g_assert_no_error (error);
+  run (&error, bindfs, "-n", dir_to_mount, dir_mountpoint, NULL);
+  g_assert_no_error (error);
+
+  if (with_mount_monitor)
+    {
+     /* Let UnixMountMonitor process its 'mounts-changed' signal
+      * triggered by mount/umount operations above */
+      while (g_main_context_iteration (NULL, FALSE));
+    }
+
+  /* Now let's test if GIO will report the new filesystem state */
+  g_clear_object (&file_info);
+  g_clear_object (&mounted_file);
+  mounted_file = g_file_new_for_path (file_in_mountpoint);
+  file_info = g_file_query_filesystem_info (mounted_file,
+                                            G_FILE_ATTRIBUTE_FILESYSTEM_READONLY, NULL, &error);
+  g_assert_no_error (error);
+  g_assert_nonnull (file_info);
+
+  g_assert_false (g_file_info_get_attribute_boolean (file_info, G_FILE_ATTRIBUTE_FILESYSTEM_READONLY));
+
+  /* Clean up */
+  g_clear_object (&mount_monitor);
+  g_clear_object (&file_info);
+  g_clear_object (&mounted_file);
+  run (&error, fusermount, "-z", "-u", dir_mountpoint, NULL);
+  g_assert_no_error (error);
+
+  assert_remove (file_in_mount);
+  assert_remove (dir_to_mount);
+  assert_remove (dir_mountpoint);
+
+  g_free (bindfs);
+  g_free (fusermount);
+  g_free (curdir);
+  g_free (dir_to_mount);
+  g_free (dir_mountpoint);
+  g_free (file_in_mount);
+  g_free (file_in_mountpoint);
+}
+
+int
+main (int argc, char *argv[])
+{
+  /* To avoid unnecessary D-Bus calls, see http://goo.gl/ir56j2 */
+  g_setenv ("GIO_USE_VFS", "local", FALSE);
+
+  g_test_init (&argc, &argv, NULL);
+
+  g_test_bug ("https://bugzilla.gnome.org/show_bug.cgi?id=787731");
+
+  g_test_add_data_func ("/g-file-info-filesystem-readonly/test-fs-ro",
+                        GINT_TO_POINTER (FALSE), test_filesystem_readonly);
+
+  /* This second test is using a running GUnixMountMonitor, so the calls to:
+   *  g_unix_mount_get(&time_read) - To fill the time_read parameter
+   *  g_unix_mounts_changed_since()
+   *
+   * made from inside g_file_query_filesystem_info() will use the mount_poller_time
+   * from the monitoring of /proc/self/mountinfo , while in the previous test new
+   * created timestamps are returned from those g_unix_mount* functions. */
+  g_test_add_data_func ("/g-file-info-filesystem-readonly/test-fs-ro-with-mount-monitor",
+                        GINT_TO_POINTER (TRUE), test_filesystem_readonly);
+
+  return g_test_run ();
+}