1 /* 2 * An opener for a file provided by an Ext2-compatible filesystem. 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 #include <e2access/image.h> 23 24 #include "ext2_file_accessor.h" 25 #include "ext2_file_opener.h" 26 27 /* Return a file identifier for the given 'path'. */ 28 29 long Ext2FileOpener::get_fileid(const char *path, flags_t flags, fileid_t *fileid) 30 { 31 /* Obtain the inode number. */ 32 33 ext2_ino_t ino; 34 errcode_t retval = image_find_path(_fs, &path, &ino); 35 36 // NOTE: Support file creation. 37 38 if (retval) 39 return -L4_ENOENT; 40 41 *fileid = (fileid_t) ino; 42 return L4_EOK; 43 } 44 45 /* Return a new accessor for 'fileid'. */ 46 47 long Ext2FileOpener::make_accessor(const char *path, flags_t flags, fileid_t fileid, Accessor **accessor) 48 { 49 (void) path; (void) flags; 50 51 ext2_file_t file; 52 errcode_t retval = ext2fs_file_open(_fs, (ext2_ino_t) fileid, EXT2_FILE_WRITE, &file); 53 54 // NOTE: Map error conditions. 55 56 if (retval) 57 return -L4_EIO; 58 59 *accessor = new Ext2FileAccessor(file, fileid); 60 return L4_EOK; 61 } 62 63 // vim: tabstop=4 expandtab shiftwidth=4