360 lines
10 KiB
C++
360 lines
10 KiB
C++
/*
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Copyright (c) 2003-2016, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_FILE_HPP_INCLUDED
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#define TORRENT_FILE_HPP_INCLUDED
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#include <memory>
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#include <string>
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#include "libtorrent/config.hpp"
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#include "libtorrent/aux_/disable_warnings_push.hpp"
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#include <boost/noncopyable.hpp>
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#include <boost/smart_ptr.hpp>
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#include <boost/function.hpp>
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#ifdef TORRENT_WINDOWS
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// windows part
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN
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#endif
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#include <windows.h>
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#include <winioctl.h>
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#include <sys/types.h>
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#else
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// posix part
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#define _FILE_OFFSET_BITS 64
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#ifndef _XOPEN_SOURCE
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#define _XOPEN_SOURCE 600
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#endif
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#include <unistd.h>
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#include <sys/uio.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <dirent.h> // for DIR
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#undef _FILE_OFFSET_BITS
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#endif
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#include "libtorrent/aux_/disable_warnings_pop.hpp"
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#include "libtorrent/error_code.hpp"
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#include "libtorrent/assert.hpp"
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#include "libtorrent/time.hpp"
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namespace libtorrent
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{
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#ifdef TORRENT_WINDOWS
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using handle_type = HANDLE;
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#else
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using handle_type = int;
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#endif
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struct file_status
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{
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boost::int64_t file_size;
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boost::uint64_t atime;
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boost::uint64_t mtime;
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boost::uint64_t ctime;
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enum {
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#if defined TORRENT_WINDOWS
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fifo = 0x1000, // named pipe (fifo)
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character_special = 0x2000, // character special
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directory = 0x4000, // directory
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regular_file = 0x8000 // regular
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#else
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fifo = 0010000, // named pipe (fifo)
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character_special = 0020000, // character special
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directory = 0040000, // directory
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block_special = 0060000, // block special
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regular_file = 0100000, // regular
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link = 0120000, // symbolic link
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socket = 0140000 // socket
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#endif
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} modes_t;
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int mode;
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};
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// internal flags for stat_file
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enum { dont_follow_links = 1 };
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TORRENT_EXTRA_EXPORT void stat_file(std::string const& f, file_status* s
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, error_code& ec, int flags = 0);
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TORRENT_EXTRA_EXPORT void rename(std::string const& f
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, std::string const& newf, error_code& ec);
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TORRENT_EXTRA_EXPORT void create_directories(std::string const& f
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, error_code& ec);
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TORRENT_EXTRA_EXPORT void create_directory(std::string const& f
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, error_code& ec);
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TORRENT_EXTRA_EXPORT void remove_all(std::string const& f
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, error_code& ec);
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TORRENT_EXTRA_EXPORT void remove(std::string const& f, error_code& ec);
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TORRENT_EXTRA_EXPORT bool exists(std::string const& f, error_code& ec);
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TORRENT_EXTRA_EXPORT bool exists(std::string const& f);
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TORRENT_EXTRA_EXPORT boost::int64_t file_size(std::string const& f);
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TORRENT_EXTRA_EXPORT bool is_directory(std::string const& f
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, error_code& ec);
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TORRENT_EXTRA_EXPORT void recursive_copy(std::string const& old_path
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, std::string const& new_path, error_code& ec);
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TORRENT_EXTRA_EXPORT void copy_file(std::string const& f
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, std::string const& newf, error_code& ec);
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TORRENT_EXTRA_EXPORT void move_file(std::string const& f
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, std::string const& newf, error_code& ec);
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// file is expected to exist, link will be created to point to it. If hard
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// links are not supported by the filesystem or OS, the file will be copied.
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TORRENT_EXTRA_EXPORT void hard_link(std::string const& file
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, std::string const& link, error_code& ec);
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TORRENT_EXTRA_EXPORT std::string split_path(std::string const& f);
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TORRENT_EXTRA_EXPORT char const* next_path_element(char const* p);
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TORRENT_EXTRA_EXPORT std::string extension(std::string const& f);
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TORRENT_EXTRA_EXPORT std::string remove_extension(std::string const& f);
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TORRENT_EXTRA_EXPORT void replace_extension(std::string& f, std::string const& ext);
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TORRENT_EXTRA_EXPORT bool is_root_path(std::string const& f);
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// internal used by create_torrent.hpp
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TORRENT_EXTRA_EXPORT std::string parent_path(std::string const& f);
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TORRENT_EXTRA_EXPORT bool has_parent_path(std::string const& f);
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TORRENT_EXTRA_EXPORT char const* filename_cstr(char const* f);
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// internal used by create_torrent.hpp
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TORRENT_EXTRA_EXPORT std::string filename(std::string const& f);
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TORRENT_EXTRA_EXPORT std::string combine_path(std::string const& lhs
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, std::string const& rhs);
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TORRENT_EXTRA_EXPORT void append_path(std::string& branch
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, std::string const& leaf);
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TORRENT_EXTRA_EXPORT void append_path(std::string& branch
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, char const* str, int len);
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// internal used by create_torrent.hpp
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TORRENT_EXTRA_EXPORT std::string complete(std::string const& f);
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TORRENT_EXTRA_EXPORT bool is_complete(std::string const& f);
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TORRENT_EXTRA_EXPORT std::string current_working_directory();
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#if TORRENT_USE_UNC_PATHS
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TORRENT_EXTRA_EXPORT std::string canonicalize_path(std::string const& f);
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#endif
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// TODO: move this into a separate header file, TU pair
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class TORRENT_EXTRA_EXPORT directory : public boost::noncopyable
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{
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public:
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directory(std::string const& path, error_code& ec);
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~directory();
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void next(error_code& ec);
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std::string file() const;
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boost::uint64_t inode() const;
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bool done() const { return m_done; }
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private:
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#ifdef TORRENT_WINDOWS
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HANDLE m_handle;
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int m_inode;
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#if TORRENT_USE_WSTRING
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WIN32_FIND_DATAW m_fd;
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#else
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WIN32_FIND_DATAA m_fd;
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#endif
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#else
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DIR* m_handle;
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// the dirent struct contains a zero-sized
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// array at the end, it will end up referring
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// to the m_name field
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struct dirent m_dirent;
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char m_name[TORRENT_MAX_PATH + 1]; // +1 to make room for null
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#endif
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bool m_done;
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};
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struct file;
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#ifdef TORRENT_DEBUG_FILE_LEAKS
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struct file_handle
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{
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file_handle();
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file_handle(file* f);
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file_handle(file_handle const& fh);
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~file_handle();
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file* operator->();
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file const* operator->() const;
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file& operator*();
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file const& operator*() const;
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file* get();
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file const* get() const;
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operator bool() const;
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file_handle& reset(file* f = NULL);
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char stack[2048];
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private:
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boost::shared_ptr<file> m_file;
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};
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void TORRENT_EXTRA_EXPORT print_open_files(char const* event, char const* name);
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#else
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using file_handle = boost::shared_ptr<file>;
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#endif
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struct TORRENT_EXTRA_EXPORT file: boost::noncopyable
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{
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// the open mode for files. Used for the file constructor or
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// file::open().
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enum open_mode_t
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{
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// open the file for reading only
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read_only = 0,
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// open the file for writing only
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write_only = 1,
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// open the file for reading and writing
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read_write = 2,
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// the mask for the bits determining read or write mode
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rw_mask = read_only | write_only | read_write,
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// open the file in sparse mode (if supported by the
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// filesystem).
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sparse = 0x4,
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// don't update the access timestamps on the file (if
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// supported by the operating system and filesystem).
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// this generally improves disk performance.
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no_atime = 0x8,
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// open the file for random access. This disables read-ahead
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// logic
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random_access = 0x10,
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// prevent the file from being opened by another process
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// while it's still being held open by this handle
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lock_file = 0x20,
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// don't put any pressure on the OS disk cache
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// because of access to this file. We expect our
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// files to be fairly large, and there is already
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// a cache at the bittorrent block level. This
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// may improve overall system performance by
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// leaving running applications in the page cache
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no_cache = 0x40,
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// this is only used for readv/writev flags
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coalesce_buffers = 0x100,
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// when creating a file, set the hidden attribute (windows only)
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attribute_hidden = 0x200,
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// when creating a file, set the executable attribute
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attribute_executable = 0x400,
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// the mask of all attribute bits
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attribute_mask = attribute_hidden | attribute_executable
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};
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#ifdef TORRENT_WINDOWS
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struct iovec_t
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{
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void* iov_base;
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size_t iov_len;
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};
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#else
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using iovec_t = iovec;
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#endif
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#ifdef TORRENT_SOLARIS
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using iovec_base_t = char*;
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#else
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using iovec_base_t = void*;
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#endif
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file();
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file(std::string const& p, int m, error_code& ec);
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~file();
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bool open(std::string const& p, int m, error_code& ec);
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bool is_open() const;
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void close();
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bool set_size(boost::int64_t size, error_code& ec);
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int open_mode() const { return m_open_mode; }
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boost::int64_t writev(boost::int64_t file_offset, iovec_t const* bufs, int num_bufs
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, error_code& ec, int flags = 0);
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boost::int64_t readv(boost::int64_t file_offset, iovec_t const* bufs, int num_bufs
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, error_code& ec, int flags = 0);
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boost::int64_t get_size(error_code& ec) const;
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// return the offset of the first byte that
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// belongs to a data-region
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boost::int64_t sparse_end(boost::int64_t start) const;
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handle_type native_handle() const { return m_file_handle; }
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#ifdef TORRENT_DISK_STATS
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boost::uint32_t file_id() const { return m_file_id; }
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#endif
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#ifdef TORRENT_DEBUG_FILE_LEAKS
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void print_info(FILE* out) const;
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#endif
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private:
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handle_type m_file_handle;
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#ifdef TORRENT_DISK_STATS
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boost::uint32_t m_file_id;
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#endif
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int m_open_mode;
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#if defined TORRENT_WINDOWS
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static bool has_manage_volume_privs;
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#endif
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#ifdef TORRENT_DEBUG_FILE_LEAKS
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std::string m_file_path;
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#endif
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};
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TORRENT_EXTRA_EXPORT int bufs_size(file::iovec_t const* bufs, int num_bufs);
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}
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#endif // TORRENT_FILE_HPP_INCLUDED
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