/* Copyright (c) 2003-2018, Arvid Norberg All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the author nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef TORRENT_FILE_HPP_INCLUDED #define TORRENT_FILE_HPP_INCLUDED #include #include #include "libtorrent/config.hpp" #include "libtorrent/aux_/disable_warnings_push.hpp" #include #include #include #ifdef TORRENT_WINDOWS // windows part #ifndef WIN32_LEAN_AND_MEAN #define WIN32_LEAN_AND_MEAN #endif #include #include #include #else // posix part #define _FILE_OFFSET_BITS 64 #ifndef _GNU_SOURCE #define _GNU_SOURCE #endif #ifndef _XOPEN_SOURCE #define _XOPEN_SOURCE 600 #endif #include #include #include #include #include // for DIR #undef _FILE_OFFSET_BITS #endif #include "libtorrent/aux_/disable_warnings_pop.hpp" #include "libtorrent/error_code.hpp" #include "libtorrent/assert.hpp" #include "libtorrent/time.hpp" namespace libtorrent { #ifdef TORRENT_WINDOWS typedef HANDLE handle_type; #else typedef int handle_type; #endif struct file_status { boost::int64_t file_size; boost::uint64_t atime; boost::uint64_t mtime; boost::uint64_t ctime; enum { #if defined TORRENT_WINDOWS fifo = 0x1000, // named pipe (fifo) character_special = 0x2000, // character special directory = 0x4000, // directory regular_file = 0x8000 // regular #else fifo = 0010000, // named pipe (fifo) character_special = 0020000, // character special directory = 0040000, // directory block_special = 0060000, // block special regular_file = 0100000, // regular link = 0120000, // symbolic link socket = 0140000 // socket #endif } modes_t; int mode; }; // internal flags for stat_file enum { dont_follow_links = 1 }; TORRENT_EXTRA_EXPORT void stat_file(std::string const& f, file_status* s , error_code& ec, int flags = 0); TORRENT_EXTRA_EXPORT void rename(std::string const& f , std::string const& newf, error_code& ec); TORRENT_EXTRA_EXPORT void create_directories(std::string const& f , error_code& ec); TORRENT_EXTRA_EXPORT void create_directory(std::string const& f , error_code& ec); TORRENT_EXTRA_EXPORT void remove_all(std::string const& f , error_code& ec); TORRENT_EXTRA_EXPORT void remove(std::string const& f, error_code& ec); TORRENT_EXTRA_EXPORT bool exists(std::string const& f, error_code& ec); TORRENT_EXTRA_EXPORT bool exists(std::string const& f); TORRENT_EXTRA_EXPORT boost::int64_t file_size(std::string const& f); TORRENT_EXTRA_EXPORT bool is_directory(std::string const& f , error_code& ec); TORRENT_EXTRA_EXPORT void recursive_copy(std::string const& old_path , std::string const& new_path, error_code& ec); TORRENT_EXTRA_EXPORT void copy_file(std::string const& f , std::string const& newf, error_code& ec); TORRENT_EXTRA_EXPORT void move_file(std::string const& f , std::string const& newf, error_code& ec); // file is expected to exist, link will be created to point to it. If hard // links are not supported by the filesystem or OS, the file will be copied. TORRENT_EXTRA_EXPORT void hard_link(std::string const& file , std::string const& link, error_code& ec); TORRENT_EXTRA_EXPORT std::string split_path(std::string const& f); TORRENT_EXTRA_EXPORT char const* next_path_element(char const* p); TORRENT_EXTRA_EXPORT std::string extension(std::string const& f); TORRENT_EXTRA_EXPORT std::string remove_extension(std::string const& f); TORRENT_EXTRA_EXPORT void replace_extension(std::string& f, std::string const& ext); TORRENT_EXTRA_EXPORT bool is_root_path(std::string const& f); TORRENT_EXTRA_EXPORT bool compare_path(std::string const& lhs, std::string const& rhs); // internal used by create_torrent.hpp TORRENT_EXTRA_EXPORT std::string parent_path(std::string const& f); TORRENT_EXTRA_EXPORT bool has_parent_path(std::string const& f); TORRENT_EXTRA_EXPORT char const* filename_cstr(char const* f); // internal used by create_torrent.hpp TORRENT_EXTRA_EXPORT std::string filename(std::string const& f); TORRENT_EXTRA_EXPORT std::string combine_path(std::string const& lhs , std::string const& rhs); TORRENT_EXTRA_EXPORT void append_path(std::string& branch , std::string const& leaf); TORRENT_EXTRA_EXPORT void append_path(std::string& branch , char const* str, int len); // internal used by create_torrent.hpp TORRENT_EXTRA_EXPORT std::string complete(std::string const& f); TORRENT_EXTRA_EXPORT bool is_complete(std::string const& f); TORRENT_EXTRA_EXPORT std::string current_working_directory(); #if TORRENT_USE_UNC_PATHS TORRENT_EXTRA_EXPORT std::string canonicalize_path(std::string const& f); #endif // TODO: move this into a separate header file, TU pair class TORRENT_EXTRA_EXPORT directory : public boost::noncopyable { public: directory(std::string const& path, error_code& ec); ~directory(); void next(error_code& ec); std::string file() const; boost::uint64_t inode() const; bool done() const { return m_done; } private: #ifdef TORRENT_WINDOWS HANDLE m_handle; int m_inode; #if TORRENT_USE_WSTRING WIN32_FIND_DATAW m_fd; #else WIN32_FIND_DATAA m_fd; #endif #else DIR* m_handle; ino_t m_inode; std::string m_name; #endif bool m_done; }; struct file; #ifdef TORRENT_DEBUG_FILE_LEAKS struct file_handle { file_handle(); file_handle(file* f); file_handle(file_handle const& fh); ~file_handle(); file* operator->(); file const* operator->() const; file& operator*(); file const& operator*() const; file* get(); file const* get() const; operator bool() const; file_handle& reset(file* f = NULL); char stack[2048]; private: boost::shared_ptr m_file; }; void TORRENT_EXTRA_EXPORT print_open_files(char const* event, char const* name); #else typedef boost::shared_ptr file_handle; #endif struct TORRENT_EXTRA_EXPORT file: boost::noncopyable { // the open mode for files. Used for the file constructor or // file::open(). enum open_mode_t { // open the file for reading only read_only = 0, // open the file for writing only write_only = 1, // open the file for reading and writing read_write = 2, // the mask for the bits determining read or write mode rw_mask = read_only | write_only | read_write, // open the file in sparse mode (if supported by the // filesystem). sparse = 0x4, // don't update the access timestamps on the file (if // supported by the operating system and filesystem). // this generally improves disk performance. no_atime = 0x8, // open the file for random access. This disables read-ahead // logic random_access = 0x10, // prevent the file from being opened by another process // while it's still being held open by this handle lock_file = 0x20, // don't put any pressure on the OS disk cache // because of access to this file. We expect our // files to be fairly large, and there is already // a cache at the bittorrent block level. This // may improve overall system performance by // leaving running applications in the page cache no_cache = 0x40, // this is only used for readv/writev flags coalesce_buffers = 0x100, // when creating a file, set the hidden attribute (windows only) attribute_hidden = 0x200, // when creating a file, set the executable attribute attribute_executable = 0x400, // the mask of all attribute bits attribute_mask = attribute_hidden | attribute_executable }; #ifdef TORRENT_WINDOWS struct iovec_t { void* iov_base; size_t iov_len; }; #else typedef iovec iovec_t; #endif // use a typedef for the type of iovec_t::iov_base // since it may differ #ifdef TORRENT_SOLARIS typedef char* iovec_base_t; #else typedef void* iovec_base_t; #endif file(); file(std::string const& p, int m, error_code& ec); ~file(); bool open(std::string const& p, int m, error_code& ec); bool is_open() const; void close(); bool set_size(boost::int64_t size, error_code& ec); int open_mode() const { return m_open_mode; } boost::int64_t writev(boost::int64_t file_offset, iovec_t const* bufs, int num_bufs , error_code& ec, int flags = 0); boost::int64_t readv(boost::int64_t file_offset, iovec_t const* bufs, int num_bufs , error_code& ec, int flags = 0); boost::int64_t get_size(error_code& ec) const; // return the offset of the first byte that // belongs to a data-region boost::int64_t sparse_end(boost::int64_t start) const; handle_type native_handle() const { return m_file_handle; } #ifdef TORRENT_DISK_STATS boost::uint32_t file_id() const { return m_file_id; } #endif #ifdef TORRENT_DEBUG_FILE_LEAKS void print_info(FILE* out) const; #endif private: handle_type m_file_handle; #ifdef TORRENT_DISK_STATS boost::uint32_t m_file_id; #endif int m_open_mode; #ifdef TORRENT_DEBUG_FILE_LEAKS std::string m_file_path; #endif }; TORRENT_EXTRA_EXPORT int bufs_size(file::iovec_t const* bufs, int num_bufs); } #endif // TORRENT_FILE_HPP_INCLUDED