/* * Copyright 2003-2016 The Music Player Daemon Project * http://www.musicpd.org * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #ifndef MPD_FS_FILESYSTEM_HXX #define MPD_FS_FILESYSTEM_HXX #include "check.h" #include "Traits.hxx" #include "system/fd_util.h" #include "Path.hxx" #ifdef WIN32 #include #endif #include #include #include class AllocatedPath; /** * Wrapper for fopen() that uses #Path names. */ static inline FILE * FOpen(Path file, PathTraitsFS::const_pointer_type mode) { #ifdef WIN32 return _tfopen(file.c_str(), mode); #else return fopen(file.c_str(), mode); #endif } /** * Wrapper for open_cloexec() that uses #Path names. */ static inline int OpenFile(Path file, int flags, int mode) { #ifdef WIN32 return _topen(file.c_str(), flags, mode); #else return open_cloexec(file.c_str(), flags, mode); #endif } /** * Wrapper for rename() that uses #Path names. */ static inline bool RenameFile(Path oldpath, Path newpath) { #ifdef WIN32 return _trename(oldpath.c_str(), newpath.c_str()) == 0; #else return rename(oldpath.c_str(), newpath.c_str()) == 0; #endif } #ifndef WIN32 /** * Wrapper for stat() that uses #Path names. */ static inline bool StatFile(Path file, struct stat &buf, bool follow_symlinks = true) { int ret = follow_symlinks ? stat(file.c_str(), &buf) : lstat(file.c_str(), &buf); return ret == 0; } #endif /** * Truncate a file that exists already. Throws std::system_error on * error. */ void TruncateFile(Path path); /** * Wrapper for unlink() that uses #Path names. */ static inline bool RemoveFile(Path file) { #ifdef WIN32 return _tunlink(file.c_str()) == 0; #else return unlink(file.c_str()) == 0; #endif } /** * Wrapper for readlink() that uses #Path names. */ AllocatedPath ReadLink(Path path); #ifndef WIN32 static inline bool MakeFifo(Path path, mode_t mode) { return mkfifo(path.c_str(), mode) == 0; } /** * Wrapper for access() that uses #Path names. */ static inline bool CheckAccess(Path path, int mode) { return access(path.c_str(), mode) == 0; } #endif /** * Checks if #Path exists and is a regular file. */ static inline bool FileExists(Path path, bool follow_symlinks = true) { #ifdef WIN32 (void)follow_symlinks; const auto a = GetFileAttributes(path.c_str()); return a != INVALID_FILE_ATTRIBUTES && (a & (FILE_ATTRIBUTE_DIRECTORY|FILE_ATTRIBUTE_DEVICE)) == 0; #else struct stat buf; return StatFile(path, buf, follow_symlinks) && S_ISREG(buf.st_mode); #endif } /** * Checks if #Path exists and is a directory. */ static inline bool DirectoryExists(Path path, bool follow_symlinks = true) { #ifdef WIN32 (void)follow_symlinks; const auto a = GetFileAttributes(path.c_str()); return a != INVALID_FILE_ATTRIBUTES && (a & FILE_ATTRIBUTE_DIRECTORY); #else struct stat buf; return StatFile(path, buf, follow_symlinks) && S_ISDIR(buf.st_mode); #endif } /** * Checks if #Path exists. */ static inline bool PathExists(Path path) { #ifdef WIN32 return GetFileAttributes(path.c_str()) != INVALID_FILE_ATTRIBUTES; #else return CheckAccess(path, F_OK); #endif } #endif