1 /* 2 * An opener for a "host" file provided via the C library. 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 <sys/stat.h> 23 24 #include "host_file_accessor.h" 25 #include "host_file_opener.h" 26 27 /* Return a file identifier for the given 'path'. */ 28 29 fileid_t HostFileOpener::get_fileid(const char *path) 30 { 31 struct stat statbuf; 32 33 /* Obtain the inode number. 34 NOTE: This does not handle errors! */ 35 36 stat(path, &statbuf); 37 38 _paths.insert(FilePathEntry(statbuf.st_ino, path)); 39 40 return statbuf.st_ino; 41 } 42 43 /* Return a new accessor for 'fileid'. */ 44 45 Accessor *HostFileOpener::make_accessor(fileid_t fileid) 46 { 47 FilePaths::iterator found = _paths.find(fileid); 48 49 if (found != _paths.end()) 50 return new HostFileAccessor(found->second, fileid); 51 else 52 return NULL; 53 } 54 55 // vim: tabstop=4 expandtab shiftwidth=4