Via a twisty little list of javascript, all unreadable :-( we arrive at
a call to query_info_async followed by query_info_finish which, when
called to collect the information for a nonexistent file throws an
exception, but when called to collect the information for an
inaccessible file returns a GIName:Gio.Task object.
JS LOG: collectFromDatadirsAsync modes
JS LOG: _collectFromDirectoryAsync [object instance proxy
GType:GLocalFile jsobj@0x7f08f086c438 native@0xa632e0]
JS LOG: _collectFromDirectoryAsync [object instance proxy
GType:GLocalFile jsobj@0x7f08f086c558 native@0xa64fa0]
JS LOG: _collectFromDirectoryAsync [object instance proxy
GType:GLocalFile jsobj@0x7f08f086c5a0 native@0xa64ee0]
JS LOG: try query_info_finish on [object instance proxy GType:GLocalFile
jsobj@0x7f08f086c438 native@0xa632e0]
JS LOG: Caught Error when getting information for file
'/usr/share/gdm/greeter/gnome-shell/modes': No such file or directory
JS LOG: try query_info_finish on [object instance proxy GType:GLocalFile
jsobj@0x7f08f086c558 native@0xa64fa0]
JS LOG: res = [object instance proxy GIName:Gio.Task jsobj@0x7f08f086c990
native@0xa5b900]
JS LOG: listDirAsync [object instance proxy GType:GLocalFile
jsobj@0x7f08f086c558 native@0xa64fa0]
JS LOG: try query_info_finish on [object instance proxy GType:GLocalFile
jsobj@0x7f08f086c5a0 native@0xa64ee0]
JS LOG: Caught Error when getting information for file
'/usr/share/gnome-shell/modes': No such file or directory
JS ERROR: !!! Exception was: Gio.IOErrorEnum: Permission denied
JS ERROR: !!! message = '"Permission denied"'
JS ERROR: !!! fileName = '"/usr/share/gnome-shell/js/misc/fileUtils.js"'
JS ERROR: !!! lineNumber = '14'
JS ERROR: !!! stack = '"0 anonymous("res" = [object GObject_Object],
"obj" = [object GObject_Object])@/usr/share/gnome-shell/js/misc/fileUtils.js:14
In /usr/share/gnome-shell/js/misc/fileUtils.js:
function _collectFromDirectoryAsync(dir, loadState) {
function done() {
loadState.numLoading--;
if (loadState.loadedCallback &&
loadState.numLoading == 0)
loadState.loadedCallback(loadState.data);
}
log ("_collectFromDirectoryAsync " + dir);
dir.query_info_async('standard::type', Gio.FileQueryInfoFlags.NONE,
GLib.PRIORITY_DEFAULT, null, function(object, res) {
try {
log ("try query_info_finish on " + object);
object.query_info_finish(res);
log ("res = " + res);
} catch (e) {
log ("Caught " + e.message);
if (!e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.NOT_FOUND))
log(e.message);
done();
return;
}
listDirAsync(dir, Lang.bind(this, function(infos) {
for (let i = 0; i < infos.length; i++)
loadState.processFile(dir.get_child(infos[i].get_name()),
infos[i], loadState.data);
done();
}));
});
}
Well, it looks like the error is in gio/glocalfileinfo.c:
GFileInfo *
_g_local_file_info_get (const char *basename,
const char *path,
GFileAttributeMatcher *attribute_matcher,
GFileQueryInfoFlags flags,
GLocalParentFileInfo *parent_info,
GError **error)
{
...
res = g_lstat (path, &statbuf);
...
if (res == -1)
{
int errsv = errno;
/* Don't bail out if we get Permission denied (SELinux?) */
if (errsv != EACCES)
{
char *display_name = g_filename_display_name (path);
g_object_unref (info);
g_set_error (error, G_IO_ERROR,
g_io_error_from_errno (errsv),
_("Error when getting information for file '%s': %s"),
display_name, g_strerror (errsv));
g_free (display_name);
return NULL;
}
}
Either libglib2 needs to be fixed to not treat EACCES as special or
fileUtils.js in gnome-shell needs to be fixed to understand the strange
return that query_info is returning in this case
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