1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/libfsserver/lib/directories/directory_resource.cc Fri Sep 10 23:57:02 2021 +0200
1.3 @@ -0,0 +1,63 @@
1.4 +/*
1.5 + * A resource offering support for accessing directories.
1.6 + *
1.7 + * Copyright (C) 2021 Paul Boddie <paul@boddie.org.uk>
1.8 + *
1.9 + * This program is free software; you can redistribute it and/or
1.10 + * modify it under the terms of the GNU General Public License as
1.11 + * published by the Free Software Foundation; either version 2 of
1.12 + * the License, or (at your option) any later version.
1.13 + *
1.14 + * This program is distributed in the hope that it will be useful,
1.15 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.16 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.17 + * GNU General Public License for more details.
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License
1.20 + * along with this program; if not, write to the Free Software
1.21 + * Foundation, Inc., 51 Franklin Street, Fifth Floor,
1.22 + * Boston, MA 02110-1301, USA
1.23 + */
1.24 +
1.25 +#include <ipc/cap_alloc.h>
1.26 +
1.27 +#include "directory_resource.h"
1.28 +#include "directory_object_server.h"
1.29 +
1.30 +
1.31 +
1.32 +int DirectoryResource::expected_items()
1.33 +{
1.34 + return DirectoryObject_expected_items;
1.35 +}
1.36 +
1.37 +ipc_server_handler_type DirectoryResource::handler()
1.38 +{
1.39 + return (ipc_server_handler_type) handle_DirectoryObject;
1.40 +}
1.41 +
1.42 +
1.43 +
1.44 +/* Open a directory to read the directory entries via a file-like object. */
1.45 +
1.46 +long DirectoryResource::opendir(flags_t flags, offset_t *size,
1.47 + l4_cap_idx_t *file, object_flags_t *object_flags)
1.48 +{
1.49 + /* Invoke the specialised directory opening method. */
1.50 +
1.51 + long err = _opendir(flags, size, file, object_flags);
1.52 +
1.53 + /* Handle propagated capabilities. By indicating the special status, the
1.54 + operation is first completed and then the capability is discarded. */
1.55 +
1.56 + if (err == IPC_MESSAGE_SENT)
1.57 + {
1.58 + complete_DirectoryObject_open(*size, *file, *object_flags);
1.59 + ipc_cap_free_um(*file);
1.60 + return IPC_MESSAGE_SENT;
1.61 + }
1.62 +
1.63 + return err;
1.64 +}
1.65 +
1.66 +// vim: tabstop=4 expandtab shiftwidth=4