1 /* 2 * A resource offering support for directory operations. 3 * 4 * Copyright (C) 2021 Paul Boddie <paul@boddie.org.uk> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA 20 */ 21 22 #pragma once 23 24 #include <fsserver/directory_object_interface.h> 25 #include <fsserver/directory_provider.h> 26 #include <fsserver/resource.h> 27 28 29 30 /* Support for providing access to directories. */ 31 32 class DirectoryResource : public Resource, public DirectoryObject 33 { 34 protected: 35 DirectoryProvider *_provider; 36 37 /* Notification endpoint for event subscription. */ 38 39 unsigned int _endpoint; 40 41 public: 42 fileid_t fileid; 43 44 DirectoryResource(fileid_t fileid, DirectoryProvider *provider); 45 46 virtual ~DirectoryResource(); 47 48 virtual void close(); 49 50 /* Server details. */ 51 52 int expected_items(); 53 54 ipc_server_handler_type handler(); 55 56 void *interface() 57 { return static_cast<DirectoryObject *>(this); } 58 59 /* Directory reading methods. */ 60 61 virtual long opendir(offset_t *size, l4_cap_idx_t *cap, 62 object_flags_t *object_flags); 63 64 /* Notification methods. */ 65 66 virtual long subscribe(l4_cap_idx_t endpoint, notify_flags_t flags); 67 68 virtual long unsubscribe(l4_cap_idx_t endpoint); 69 }; 70 71 // vim: tabstop=4 expandtab shiftwidth=4