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Diffstat (limited to 'src/third_party/boost-1.69.0/libs/filesystem/src/operations.cpp')
-rw-r--r-- | src/third_party/boost-1.69.0/libs/filesystem/src/operations.cpp | 2409 |
1 files changed, 2409 insertions, 0 deletions
diff --git a/src/third_party/boost-1.69.0/libs/filesystem/src/operations.cpp b/src/third_party/boost-1.69.0/libs/filesystem/src/operations.cpp new file mode 100644 index 00000000000..53dcdb70c96 --- /dev/null +++ b/src/third_party/boost-1.69.0/libs/filesystem/src/operations.cpp @@ -0,0 +1,2409 @@ +// operations.cpp --------------------------------------------------------------------// + +// Copyright 2002-2009, 2014 Beman Dawes +// Copyright 2001 Dietmar Kuehl + +// Distributed under the Boost Software License, Version 1.0. +// See http://www.boost.org/LICENSE_1_0.txt + +// See library home page at http://www.boost.org/libs/filesystem + +//--------------------------------------------------------------------------------------// + +// define 64-bit offset macros BEFORE including boost/config.hpp (see ticket #5355) +#if defined(__ANDROID__) && defined(__ANDROID_API__) && __ANDROID_API__ < 24 +// Android fully supports 64-bit file offsets only for API 24 and above. +// +// Trying to define _FILE_OFFSET_BITS=64 for APIs below 24 +// leads to compilation failure for one or another reason, +// depending on target Android API level, Android NDK version, +// used STL, order of include paths and more. +// For more information, please see: +// - https://github.com/boostorg/filesystem/issues/65 +// - https://github.com/boostorg/filesystem/pull/69 +// +// Android NDK developers consider it the expected behavior. +// See their official position here: +// - https://github.com/android-ndk/ndk/issues/501#issuecomment-326447479 +// - https://android.googlesource.com/platform/bionic/+/a34817457feee026e8702a1d2dffe9e92b51d7d1/docs/32-bit-abi.md#32_bit-abi-bugs +// +// Thus we do not define _FILE_OFFSET_BITS in such case. +#else +// Defining _FILE_OFFSET_BITS=64 should kick in 64-bit off_t's +// (and thus st_size) on 32-bit systems that provide the Large File +// Support (LFS) interface, such as Linux, Solaris, and IRIX. +// +// At the time of this comment writing (March 2018), on most systems +// _FILE_OFFSET_BITS=64 definition is harmless: +// either the definition is supported and enables 64-bit off_t, +// or the definition is not supported and is ignored, in which case +// off_t does not change its default size for the target system +// (which may be 32-bit or 64-bit already). +// Thus it makes sense to have _FILE_OFFSET_BITS=64 defined by default, +// instead of listing every system that supports the definition. +// Those few systems, on which _FILE_OFFSET_BITS=64 is harmful, +// for example this definition causes compilation failure on those systems, +// should be exempt from defining _FILE_OFFSET_BITS by adding +// an appropriate #elif block above with the appropriate comment. +// +// _FILE_OFFSET_BITS must be defined before any headers are included +// to ensure that the definition is available to all included headers. +// That is required at least on Solaris, and possibly on other +// systems as well. +#define _FILE_OFFSET_BITS 64 +#endif + +// define BOOST_FILESYSTEM_SOURCE so that <boost/filesystem/config.hpp> knows +// the library is being built (possibly exporting rather than importing code) +#define BOOST_FILESYSTEM_SOURCE + +#ifndef BOOST_SYSTEM_NO_DEPRECATED +# define BOOST_SYSTEM_NO_DEPRECATED +#endif + +#ifndef _POSIX_PTHREAD_SEMANTICS +# define _POSIX_PTHREAD_SEMANTICS // Sun readdir_r()needs this +#endif + +#include <boost/filesystem/operations.hpp> +#include <boost/scoped_array.hpp> +#include <boost/detail/workaround.hpp> +#include <limits> +#include <vector> +#include <cstdlib> // for malloc, free +#include <cstring> +#include <cstdio> // for remove, rename +#if defined(__QNXNTO__) // see ticket #5355 +# include <stdio.h> +#endif +#include <cerrno> + +#ifdef BOOST_FILEYSTEM_INCLUDE_IOSTREAM +# include <iostream> +#endif + +namespace fs = boost::filesystem; +using boost::filesystem::path; +using boost::filesystem::filesystem_error; +using boost::filesystem::perms; +using boost::system::error_code; +using boost::system::error_category; +using boost::system::system_category; +using std::string; +using std::wstring; + +# ifdef BOOST_POSIX_API + +# include <sys/types.h> +# include <sys/stat.h> +# if !defined(__APPLE__) && !defined(__OpenBSD__) && !defined(__ANDROID__) \ + && !defined(__VXWORKS__) +# include <sys/statvfs.h> +# define BOOST_STATVFS statvfs +# define BOOST_STATVFS_F_FRSIZE vfs.f_frsize +# else +# ifdef __OpenBSD__ +# include <sys/param.h> +# elif defined(__ANDROID__) +# include <sys/vfs.h> +# endif +# if !defined(__VXWORKS__) +# include <sys/mount.h> +# endif +# define BOOST_STATVFS statfs +# define BOOST_STATVFS_F_FRSIZE static_cast<boost::uintmax_t>(vfs.f_bsize) +# endif +# include <dirent.h> +# include <unistd.h> +# include <fcntl.h> +# include <utime.h> +# include "limits.h" + +# else // BOOST_WINDOW_API + +# if (defined(__MINGW32__) || defined(__CYGWIN__)) && !defined(WINVER) + // Versions of MinGW or Cygwin that support Filesystem V3 support at least WINVER 0x501. + // See MinGW's windef.h +# define WINVER 0x501 +# endif +# include <cwchar> +# include <io.h> +# include <windows.h> +# include <winnt.h> +# if !defined(_WIN32_WINNT) +# define _WIN32_WINNT 0x0500 +# endif +# if defined(__BORLANDC__) || defined(__MWERKS__) +# if defined(__BORLANDC__) + using std::time_t; +# endif +# include <utime.h> +# else +# include <sys/utime.h> +# endif + +// REPARSE_DATA_BUFFER related definitions are found in ntifs.h, which is part of the +// Windows Device Driver Kit. Since that's inconvenient, the definitions are provided +// here. See http://msdn.microsoft.com/en-us/library/ms791514.aspx + +#if !defined(REPARSE_DATA_BUFFER_HEADER_SIZE) // mingw winnt.h does provide the defs + +#define SYMLINK_FLAG_RELATIVE 1 + +typedef struct _REPARSE_DATA_BUFFER { + ULONG ReparseTag; + USHORT ReparseDataLength; + USHORT Reserved; + union { + struct { + USHORT SubstituteNameOffset; + USHORT SubstituteNameLength; + USHORT PrintNameOffset; + USHORT PrintNameLength; + ULONG Flags; + WCHAR PathBuffer[1]; + /* Example of distinction between substitute and print names: + mklink /d ldrive c:\ + SubstituteName: c:\\??\ + PrintName: c:\ + */ + } SymbolicLinkReparseBuffer; + struct { + USHORT SubstituteNameOffset; + USHORT SubstituteNameLength; + USHORT PrintNameOffset; + USHORT PrintNameLength; + WCHAR PathBuffer[1]; + } MountPointReparseBuffer; + struct { + UCHAR DataBuffer[1]; + } GenericReparseBuffer; + }; +} REPARSE_DATA_BUFFER, *PREPARSE_DATA_BUFFER; + +#define REPARSE_DATA_BUFFER_HEADER_SIZE \ + FIELD_OFFSET(REPARSE_DATA_BUFFER, GenericReparseBuffer) + +#endif + +#ifndef MAXIMUM_REPARSE_DATA_BUFFER_SIZE +#define MAXIMUM_REPARSE_DATA_BUFFER_SIZE ( 16 * 1024 ) +#endif + +# ifndef FSCTL_GET_REPARSE_POINT +# define FSCTL_GET_REPARSE_POINT 0x900a8 +# endif + +# ifndef IO_REPARSE_TAG_SYMLINK +# define IO_REPARSE_TAG_SYMLINK (0xA000000CL) +# endif + +inline std::wstring wgetenv(const wchar_t* name) +{ + // use vector since for C++03 basic_string is not required to be contiguous + std::vector<wchar_t> buf(::GetEnvironmentVariableW(name, NULL, 0)); + + // C++03 vector does not have data() so use &buf[0] + return (buf.empty() + || ::GetEnvironmentVariableW(name, &buf[0], static_cast<DWORD>(buf.size())) == 0) + ? std::wstring() : std::wstring(&buf[0]); +} + +# endif // BOOST_WINDOWS_API + +// BOOST_FILESYSTEM_STATUS_CACHE enables file_status cache in +// dir_itr_increment. The config tests are placed here because some of the +// macros being tested come from dirent.h. +// +// TODO: find out what macros indicate dirent::d_type present in more libraries +# if defined(BOOST_WINDOWS_API)\ + || defined(_DIRENT_HAVE_D_TYPE)// defined by GNU C library if d_type present +# define BOOST_FILESYSTEM_STATUS_CACHE +# endif + +// POSIX/Windows macros ----------------------------------------------------// + +// Portions of the POSIX and Windows API's are very similar, except for name, +// order of arguments, and meaning of zero/non-zero returns. The macros below +// abstract away those differences. They follow Windows naming and order of +// arguments, and return true to indicate no error occurred. [POSIX naming, +// order of arguments, and meaning of return were followed initially, but +// found to be less clear and cause more coding errors.] + +# if defined(BOOST_POSIX_API) + +typedef int err_t; + +// POSIX uses a 0 return to indicate success +# define BOOST_ERRNO errno +# define BOOST_SET_CURRENT_DIRECTORY(P)(::chdir(P)== 0) +# define BOOST_CREATE_DIRECTORY(P)(::mkdir(P, S_IRWXU|S_IRWXG|S_IRWXO)== 0) +# define BOOST_CREATE_HARD_LINK(F,T)(::link(T, F)== 0) +# define BOOST_CREATE_SYMBOLIC_LINK(F,T,Flag)(::symlink(T, F)== 0) +# define BOOST_REMOVE_DIRECTORY(P)(::rmdir(P)== 0) +# define BOOST_DELETE_FILE(P)(::unlink(P)== 0) +# define BOOST_COPY_DIRECTORY(F,T)(!(::stat(from.c_str(), &from_stat)!= 0\ + || ::mkdir(to.c_str(),from_stat.st_mode)!= 0)) +# define BOOST_COPY_FILE(F,T,FailIfExistsBool)copy_file_api(F, T, FailIfExistsBool) +# define BOOST_MOVE_FILE(OLD,NEW)(::rename(OLD, NEW)== 0) +# define BOOST_RESIZE_FILE(P,SZ)(::truncate(P, SZ)== 0) + +# define BOOST_ERROR_NOT_SUPPORTED ENOSYS +# define BOOST_ERROR_ALREADY_EXISTS EEXIST + +# else // BOOST_WINDOWS_API + +typedef DWORD err_t; + +// Windows uses a non-0 return to indicate success +# define BOOST_ERRNO ::GetLastError() +# define BOOST_SET_CURRENT_DIRECTORY(P)(::SetCurrentDirectoryW(P)!= 0) +# define BOOST_CREATE_DIRECTORY(P)(::CreateDirectoryW(P, 0)!= 0) +# define BOOST_CREATE_HARD_LINK(F,T)(create_hard_link_api(F, T, 0)!= 0) +# define BOOST_CREATE_SYMBOLIC_LINK(F,T,Flag)(create_symbolic_link_api(F, T, Flag)!= 0) +# define BOOST_REMOVE_DIRECTORY(P)(::RemoveDirectoryW(P)!= 0) +# define BOOST_DELETE_FILE(P)(::DeleteFileW(P)!= 0) +# define BOOST_COPY_DIRECTORY(F,T)(::CreateDirectoryExW(F, T, 0)!= 0) +# define BOOST_COPY_FILE(F,T,FailIfExistsBool)(::CopyFileW(F, T, FailIfExistsBool)!= 0) +# define BOOST_MOVE_FILE(OLD,NEW)(::MoveFileExW(OLD, NEW, MOVEFILE_REPLACE_EXISTING|MOVEFILE_COPY_ALLOWED)!= 0) +# define BOOST_RESIZE_FILE(P,SZ)(resize_file_api(P, SZ)!= 0) +# define BOOST_READ_SYMLINK(P,T) + +# define BOOST_ERROR_ALREADY_EXISTS ERROR_ALREADY_EXISTS +# define BOOST_ERROR_NOT_SUPPORTED ERROR_NOT_SUPPORTED + +# endif + +//--------------------------------------------------------------------------------------// +// // +// helpers (all operating systems) // +// // +//--------------------------------------------------------------------------------------// + +namespace +{ + + fs::file_type query_file_type(const path& p, error_code* ec); + + boost::filesystem::directory_iterator end_dir_itr; + + // error handling helpers ----------------------------------------------------------// + + bool error(err_t error_num, error_code* ec, const char* message); + bool error(err_t error_num, const path& p, error_code* ec, const char* message); + bool error(err_t error_num, const path& p1, const path& p2, error_code* ec, + const char* message); + + const error_code ok; + + // error_num is value of errno on POSIX, error code (from ::GetLastError()) on Windows. + // Interface changed 30 Jan 15 to have caller supply error_num as ::SetLastError() + // values were apparently getting cleared before they could be retrieved by error(). + + bool error(err_t error_num, error_code* ec, const char* message) + { + if (!error_num) + { + if (ec != 0) ec->clear(); + } + else + { // error + if (ec == 0) + BOOST_FILESYSTEM_THROW(filesystem_error(message, + error_code(error_num, system_category()))); + else + ec->assign(error_num, system_category()); + } + return error_num != 0; + } + + bool error(err_t error_num, const path& p, error_code* ec, const char* message) + { + if (!error_num) + { + if (ec != 0) ec->clear(); + } + else + { // error + if (ec == 0) + BOOST_FILESYSTEM_THROW(filesystem_error(message, + p, error_code(error_num, system_category()))); + else + ec->assign(error_num, system_category()); + } + return error_num != 0; + } + + bool error(err_t error_num, const path& p1, const path& p2, error_code* ec, + const char* message) + { + if (!error_num) + { + if (ec != 0) ec->clear(); + } + else + { // error + if (ec == 0) + BOOST_FILESYSTEM_THROW(filesystem_error(message, + p1, p2, error_code(error_num, system_category()))); + else + ec->assign(error_num, system_category()); + } + return error_num != 0; + } + + // general helpers -----------------------------------------------------------------// + + bool is_empty_directory(const path& p, error_code* ec) + { + return (ec != 0 ? fs::directory_iterator(p, *ec) : fs::directory_iterator(p)) + == end_dir_itr; + } + + bool not_found_error(int errval); // forward declaration + + // only called if directory exists + bool remove_directory(const path& p) // true if succeeds or not found + { + return BOOST_REMOVE_DIRECTORY(p.c_str()) + || not_found_error(BOOST_ERRNO); // mitigate possible file system race. See #11166 + } + + // only called if file exists + bool remove_file(const path& p) // true if succeeds or not found + { + return BOOST_DELETE_FILE(p.c_str()) + || not_found_error(BOOST_ERRNO); // mitigate possible file system race. See #11166 + } + + // called by remove and remove_all_aux + bool remove_file_or_directory(const path& p, fs::file_type type, error_code* ec) + // return true if file removed, false if not removed + { + if (type == fs::file_not_found) + { + if (ec != 0) ec->clear(); + return false; + } + + if (type == fs::directory_file +# ifdef BOOST_WINDOWS_API + || type == fs::_detail_directory_symlink +# endif + ) + { + if (error(!remove_directory(p) ? BOOST_ERRNO : 0, p, ec, + "boost::filesystem::remove")) + return false; + } + else + { + if (error(!remove_file(p) ? BOOST_ERRNO : 0, p, ec, + "boost::filesystem::remove")) + return false; + } + return true; + } + + boost::uintmax_t remove_all_aux(const path& p, fs::file_type type, + error_code* ec) + { + boost::uintmax_t count = 0; + + if (type == fs::directory_file) // but not a directory symlink + { + fs::directory_iterator itr; + if (ec != 0) + { + itr = fs::directory_iterator(p, *ec); + if (*ec) + return count; + } + else + itr = fs::directory_iterator(p); + + while(itr != end_dir_itr) + { + fs::file_type tmp_type = query_file_type(itr->path(), ec); + if (ec != 0 && *ec) + return count; + + count += remove_all_aux(itr->path(), tmp_type, ec); + if (ec != 0 && *ec) + return count; + + fs::detail::directory_iterator_increment(itr, ec); + if (ec != 0 && *ec) + return count; + } + } + + remove_file_or_directory(p, type, ec); + if (ec != 0 && *ec) + return count; + + return ++count; + } + +#ifdef BOOST_POSIX_API + +//--------------------------------------------------------------------------------------// +// // +// POSIX-specific helpers // +// // +//--------------------------------------------------------------------------------------// + + const char dot = '.'; + + bool not_found_error(int errval) + { + return errno == ENOENT || errno == ENOTDIR; + } + + bool // true if ok + copy_file_api(const std::string& from_p, + const std::string& to_p, bool fail_if_exists) + { + const std::size_t buf_sz = 32768; + boost::scoped_array<char> buf(new char [buf_sz]); + int infile=-1, outfile=-1; // -1 means not open + + // bug fixed: code previously did a stat()on the from_file first, but that + // introduced a gratuitous race condition; the stat()is now done after the open() + + if ((infile = ::open(from_p.c_str(), O_RDONLY))< 0) + { return false; } + + struct stat from_stat; + if (::stat(from_p.c_str(), &from_stat)!= 0) + { + ::close(infile); + return false; + } + + int oflag = O_CREAT | O_WRONLY | O_TRUNC; + if (fail_if_exists) + oflag |= O_EXCL; + if ((outfile = ::open(to_p.c_str(), oflag, from_stat.st_mode))< 0) + { + int open_errno = errno; + BOOST_ASSERT(infile >= 0); + ::close(infile); + errno = open_errno; + return false; + } + + ssize_t sz, sz_read=1, sz_write; + while (sz_read > 0 + && (sz_read = ::read(infile, buf.get(), buf_sz)) > 0) + { + // Allow for partial writes - see Advanced Unix Programming (2nd Ed.), + // Marc Rochkind, Addison-Wesley, 2004, page 94 + sz_write = 0; + do + { + BOOST_ASSERT(sz_read - sz_write > 0); // #1 + // ticket 4438 claimed possible infinite loop if write returns 0. My analysis + // is that POSIX specifies 0 return only if 3rd arg is 0, and that will never + // happen due to loop entry and coninuation conditions. BOOST_ASSERT #1 above + // and #2 below added to verify that analysis. + if ((sz = ::write(outfile, buf.get() + sz_write, + sz_read - sz_write)) < 0) + { + sz_read = sz; // cause read loop termination + break; // and error reported after closes + } + BOOST_ASSERT(sz > 0); // #2 + sz_write += sz; + } while (sz_write < sz_read); + } + + if (::close(infile)< 0) + sz_read = -1; + if (::close(outfile)< 0) + sz_read = -1; + + return sz_read >= 0; + } + + inline fs::file_type query_file_type(const path& p, error_code* ec) + { + return fs::detail::symlink_status(p, ec).type(); + } + +# else + +//--------------------------------------------------------------------------------------// +// // +// Windows-specific helpers // +// // +//--------------------------------------------------------------------------------------// + + const std::size_t buf_size=128; + + const wchar_t dot = L'.'; + + bool not_found_error(int errval) + { + return errval == ERROR_FILE_NOT_FOUND + || errval == ERROR_PATH_NOT_FOUND + || errval == ERROR_INVALID_NAME // "tools/jam/src/:sys:stat.h", "//foo" + || errval == ERROR_INVALID_DRIVE // USB card reader with no card inserted + || errval == ERROR_NOT_READY // CD/DVD drive with no disc inserted + || errval == ERROR_INVALID_PARAMETER // ":sys:stat.h" + || errval == ERROR_BAD_PATHNAME // "//nosuch" on Win64 + || errval == ERROR_BAD_NETPATH; // "//nosuch" on Win32 + } + + static bool equal_extension( wchar_t const* p, wchar_t const (&x1)[ 5 ], wchar_t const (&x2)[ 5 ] ) + { + return + (p[0] == x1[0] || p[0] == x2[0]) && + (p[1] == x1[1] || p[1] == x2[1]) && + (p[2] == x1[2] || p[2] == x2[2]) && + (p[3] == x1[3] || p[3] == x2[3]) && + p[4] == 0; + } + + perms make_permissions(const path& p, DWORD attr) + { + perms prms = fs::owner_read | fs::group_read | fs::others_read; + if ((attr & FILE_ATTRIBUTE_READONLY) == 0) + prms |= fs::owner_write | fs::group_write | fs::others_write; + path ext = p.extension(); + wchar_t const* q = ext.c_str(); + if (equal_extension(q, L".exe", L".EXE") + || equal_extension(q, L".com", L".COM") + || equal_extension(q, L".bat", L".BAT") + || equal_extension(q, L".cmd", L".CMD")) + prms |= fs::owner_exe | fs::group_exe | fs::others_exe; + return prms; + } + + // these constants come from inspecting some Microsoft sample code + std::time_t to_time_t(const FILETIME & ft) + { + __int64 t = (static_cast<__int64>(ft.dwHighDateTime)<< 32) + + ft.dwLowDateTime; +# if !defined(BOOST_MSVC) || BOOST_MSVC > 1300 // > VC++ 7.0 + t -= 116444736000000000LL; +# else + t -= 116444736000000000; +# endif + t /= 10000000; + return static_cast<std::time_t>(t); + } + + void to_FILETIME(std::time_t t, FILETIME & ft) + { + __int64 temp = t; + temp *= 10000000; +# if !defined(BOOST_MSVC) || BOOST_MSVC > 1300 // > VC++ 7.0 + temp += 116444736000000000LL; +# else + temp += 116444736000000000; +# endif + ft.dwLowDateTime = static_cast<DWORD>(temp); + ft.dwHighDateTime = static_cast<DWORD>(temp >> 32); + } + + // Thanks to Jeremy Maitin-Shepard for much help and for permission to + // base the equivalent()implementation on portions of his + // file-equivalence-win32.cpp experimental code. + + struct handle_wrapper + { + HANDLE handle; + handle_wrapper(HANDLE h) + : handle(h){} + ~handle_wrapper() + { + if (handle != INVALID_HANDLE_VALUE) + ::CloseHandle(handle); + } + }; + + HANDLE create_file_handle(const path& p, DWORD dwDesiredAccess, + DWORD dwShareMode, LPSECURITY_ATTRIBUTES lpSecurityAttributes, + DWORD dwCreationDisposition, DWORD dwFlagsAndAttributes, + HANDLE hTemplateFile) + { + return ::CreateFileW(p.c_str(), dwDesiredAccess, dwShareMode, + lpSecurityAttributes, dwCreationDisposition, dwFlagsAndAttributes, + hTemplateFile); + } + + bool is_reparse_point_a_symlink(const path& p) + { + handle_wrapper h(create_file_handle(p, FILE_READ_EA, + FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING, + FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT, NULL)); + if (h.handle == INVALID_HANDLE_VALUE) + return false; + + boost::scoped_array<char> buf(new char [MAXIMUM_REPARSE_DATA_BUFFER_SIZE]); + + // Query the reparse data + DWORD dwRetLen; + BOOL result = ::DeviceIoControl(h.handle, FSCTL_GET_REPARSE_POINT, NULL, 0, buf.get(), + MAXIMUM_REPARSE_DATA_BUFFER_SIZE, &dwRetLen, NULL); + if (!result) return false; + + return reinterpret_cast<const REPARSE_DATA_BUFFER*>(buf.get())->ReparseTag + == IO_REPARSE_TAG_SYMLINK + // Issue 9016 asked that NTFS directory junctions be recognized as directories. + // That is equivalent to recognizing them as symlinks, and then the normal symlink + // mechanism will take care of recognizing them as directories. + // + // Directory junctions are very similar to symlinks, but have some performance + // and other advantages over symlinks. They can be created from the command line + // with "mklink /j junction-name target-path". + || reinterpret_cast<const REPARSE_DATA_BUFFER*>(buf.get())->ReparseTag + == IO_REPARSE_TAG_MOUNT_POINT; // aka "directory junction" or "junction" + } + + inline std::size_t get_full_path_name( + const path& src, std::size_t len, wchar_t* buf, wchar_t** p) + { + return static_cast<std::size_t>( + ::GetFullPathNameW(src.c_str(), static_cast<DWORD>(len), buf, p)); + } + + fs::file_status process_status_failure(const path& p, error_code* ec) + { + int errval(::GetLastError()); + if (ec != 0) // always report errval, even though some + ec->assign(errval, system_category()); // errval values are not status_errors + + if (not_found_error(errval)) + { + return fs::file_status(fs::file_not_found, fs::no_perms); + } + else if (errval == ERROR_SHARING_VIOLATION) + { + return fs::file_status(fs::type_unknown); + } + if (ec == 0) + BOOST_FILESYSTEM_THROW(filesystem_error("boost::filesystem::status", + p, error_code(errval, system_category()))); + return fs::file_status(fs::status_error); + } + + // differs from symlink_status() in that directory symlinks are reported as + // _detail_directory_symlink, as required on Windows by remove() and its helpers. + fs::file_type query_file_type(const path& p, error_code* ec) + { + DWORD attr(::GetFileAttributesW(p.c_str())); + if (attr == 0xFFFFFFFF) + { + return process_status_failure(p, ec).type(); + } + + if (ec != 0) ec->clear(); + + if (attr & FILE_ATTRIBUTE_REPARSE_POINT) + { + if (is_reparse_point_a_symlink(p)) + return (attr & FILE_ATTRIBUTE_DIRECTORY) + ? fs::_detail_directory_symlink + : fs::symlink_file; + return fs::reparse_file; + } + + return (attr & FILE_ATTRIBUTE_DIRECTORY) + ? fs::directory_file + : fs::regular_file; + } + + BOOL resize_file_api(const wchar_t* p, boost::uintmax_t size) + { + handle_wrapper h(CreateFileW(p, GENERIC_WRITE, 0, 0, OPEN_EXISTING, + FILE_ATTRIBUTE_NORMAL, 0)); + LARGE_INTEGER sz; + sz.QuadPart = size; + return h.handle != INVALID_HANDLE_VALUE + && ::SetFilePointerEx(h.handle, sz, 0, FILE_BEGIN) + && ::SetEndOfFile(h.handle); + } + + // Windows kernel32.dll functions that may or may not be present + // must be accessed through pointers + + typedef BOOL (WINAPI *PtrCreateHardLinkW)( + /*__in*/ LPCWSTR lpFileName, + /*__in*/ LPCWSTR lpExistingFileName, + /*__reserved*/ LPSECURITY_ATTRIBUTES lpSecurityAttributes + ); + + PtrCreateHardLinkW create_hard_link_api = PtrCreateHardLinkW( + ::GetProcAddress( + ::GetModuleHandleW(L"kernel32.dll"), "CreateHardLinkW")); + + typedef BOOLEAN (WINAPI *PtrCreateSymbolicLinkW)( + /*__in*/ LPCWSTR lpSymlinkFileName, + /*__in*/ LPCWSTR lpTargetFileName, + /*__in*/ DWORD dwFlags + ); + + PtrCreateSymbolicLinkW create_symbolic_link_api = PtrCreateSymbolicLinkW( + ::GetProcAddress( + ::GetModuleHandleW(L"kernel32.dll"), "CreateSymbolicLinkW")); + +#endif + +//#ifdef BOOST_WINDOWS_API +// +// +// inline bool get_free_disk_space(const std::wstring& ph, +// PULARGE_INTEGER avail, PULARGE_INTEGER total, PULARGE_INTEGER free) +// { return ::GetDiskFreeSpaceExW(ph.c_str(), avail, total, free)!= 0; } +// +//#endif + +} // unnamed namespace + +//--------------------------------------------------------------------------------------// +// // +// operations functions declared in operations.hpp // +// in alphabetic order // +// // +//--------------------------------------------------------------------------------------// + +namespace boost +{ +namespace filesystem +{ + + BOOST_FILESYSTEM_DECL + path absolute(const path& p, const path& base) + { +// if ( p.empty() || p.is_absolute() ) +// return p; +// // recursively calling absolute is sub-optimal, but is simple +// path abs_base(base.is_absolute() ? base : absolute(base)); +//# ifdef BOOST_WINDOWS_API +// if (p.has_root_directory()) +// return abs_base.root_name() / p; +// // !p.has_root_directory +// if (p.has_root_name()) +// return p.root_name() +// / abs_base.root_directory() / abs_base.relative_path() / p.relative_path(); +// // !p.has_root_name() +//# endif +// return abs_base / p; + + // recursively calling absolute is sub-optimal, but is sure and simple + path abs_base(base.is_absolute() ? base : absolute(base)); + + // store expensive to compute values that are needed multiple times + path p_root_name (p.root_name()); + path base_root_name (abs_base.root_name()); + path p_root_directory (p.root_directory()); + + if (p.empty()) + return abs_base; + + if (!p_root_name.empty()) // p.has_root_name() + { + if (p_root_directory.empty()) // !p.has_root_directory() + return p_root_name / abs_base.root_directory() + / abs_base.relative_path() / p.relative_path(); + // p is absolute, so fall through to return p at end of block + } + + else if (!p_root_directory.empty()) // p.has_root_directory() + { +# ifdef BOOST_POSIX_API + // POSIX can have root name it it is a network path + if (base_root_name.empty()) // !abs_base.has_root_name() + return p; +# endif + return base_root_name / p; + } + + else + { + return abs_base / p; + } + + return p; // p.is_absolute() is true + } + +namespace detail +{ + BOOST_FILESYSTEM_DECL bool possible_large_file_size_support() + { +# ifdef BOOST_POSIX_API + struct stat lcl_stat; + return sizeof(lcl_stat.st_size)> 4; +# else + return true; +# endif + } + + BOOST_FILESYSTEM_DECL + path canonical(const path& p, const path& base, system::error_code* ec) + { + path source (p.is_absolute() ? p : absolute(p, base)); + path root(source.root_path()); + path result; + + system::error_code local_ec; + file_status stat (status(source, local_ec)); + + if (stat.type() == fs::file_not_found) + { + if (ec == 0) + BOOST_FILESYSTEM_THROW(filesystem_error( + "boost::filesystem::canonical", source, + error_code(system::errc::no_such_file_or_directory, system::generic_category()))); + ec->assign(system::errc::no_such_file_or_directory, system::generic_category()); + return result; + } + else if (local_ec) + { + if (ec == 0) + BOOST_FILESYSTEM_THROW(filesystem_error( + "boost::filesystem::canonical", source, local_ec)); + *ec = local_ec; + return result; + } + + bool scan (true); + while (scan) + { + scan = false; + result.clear(); + for (path::iterator itr = source.begin(); itr != source.end(); ++itr) + { + if (*itr == dot_path()) + continue; + if (*itr == dot_dot_path()) + { + if (result != root) + result.remove_filename(); + continue; + } + + result /= *itr; + + bool is_sym (is_symlink(detail::symlink_status(result, ec))); + if (ec && *ec) + return path(); + + if (is_sym) + { + path link(detail::read_symlink(result, ec)); + if (ec && *ec) + return path(); + result.remove_filename(); + + if (link.is_absolute()) + { + for (++itr; itr != source.end(); ++itr) + link /= *itr; + source = link; + } + else // link is relative + { + path new_source(result); + new_source /= link; + for (++itr; itr != source.end(); ++itr) + new_source /= *itr; + source = new_source; + } + scan = true; // symlink causes scan to be restarted + break; + } + } + } + if (ec != 0) + ec->clear(); + BOOST_ASSERT_MSG(result.is_absolute(), "canonical() implementation error; please report"); + return result; + } + + BOOST_FILESYSTEM_DECL + void copy(const path& from, const path& to, system::error_code* ec) + { + file_status s(detail::symlink_status(from, ec)); + if (ec != 0 && *ec) return; + + if(is_symlink(s)) + { + detail::copy_symlink(from, to, ec); + } + else if(is_directory(s)) + { + detail::copy_directory(from, to, ec); + } + else if(is_regular_file(s)) + { + detail::copy_file(from, to, detail::fail_if_exists, ec); + } + else + { + if (ec == 0) + BOOST_FILESYSTEM_THROW(filesystem_error("boost::filesystem::copy", + from, to, error_code(BOOST_ERROR_NOT_SUPPORTED, system_category()))); + ec->assign(BOOST_ERROR_NOT_SUPPORTED, system_category()); + } + } + + BOOST_FILESYSTEM_DECL + void copy_directory(const path& from, const path& to, system::error_code* ec) + { +# ifdef BOOST_POSIX_API + struct stat from_stat; +# endif + error(!BOOST_COPY_DIRECTORY(from.c_str(), to.c_str()) ? BOOST_ERRNO : 0, + from, to, ec, "boost::filesystem::copy_directory"); + } + + BOOST_FILESYSTEM_DECL + void copy_file(const path& from, const path& to, copy_option option, error_code* ec) + { + error(!BOOST_COPY_FILE(from.c_str(), to.c_str(), + option == fail_if_exists) ? BOOST_ERRNO : 0, + from, to, ec, "boost::filesystem::copy_file"); + } + + BOOST_FILESYSTEM_DECL + void copy_symlink(const path& existing_symlink, const path& new_symlink, + system::error_code* ec) + { +# if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0600 + error(BOOST_ERROR_NOT_SUPPORTED, new_symlink, existing_symlink, ec, + "boost::filesystem::copy_symlink"); + +# else // modern Windows or BOOST_POSIX_API + path p(read_symlink(existing_symlink, ec)); + if (ec != 0 && *ec) return; + create_symlink(p, new_symlink, ec); + +# endif + } + + BOOST_FILESYSTEM_DECL + bool create_directories(const path& p, system::error_code* ec) + { + if (p.empty()) + { + if (ec == 0) + BOOST_FILESYSTEM_THROW(filesystem_error( + "boost::filesystem::create_directories", p, + system::errc::make_error_code(system::errc::invalid_argument))); + else + ec->assign(system::errc::invalid_argument, system::generic_category()); + return false; + } + + if (p.filename_is_dot() || p.filename_is_dot_dot()) + return create_directories(p.parent_path(), ec); + + error_code local_ec; + file_status p_status = status(p, local_ec); + + if (p_status.type() == directory_file) + { + if (ec != 0) + ec->clear(); + return false; + } + + path parent = p.parent_path(); + BOOST_ASSERT_MSG(parent != p, "internal error: p == p.parent_path()"); + if (!parent.empty()) + { + // determine if the parent exists + file_status parent_status = status(parent, local_ec); + + // if the parent does not exist, create the parent + if (parent_status.type() == file_not_found) + { + create_directories(parent, local_ec); + if (local_ec) + { + if (ec == 0) + BOOST_FILESYSTEM_THROW(filesystem_error( + "boost::filesystem::create_directories", parent, local_ec)); + else + *ec = local_ec; + return false; + } + } + } + + // create the directory + return create_directory(p, ec); + } + + BOOST_FILESYSTEM_DECL + bool create_directory(const path& p, error_code* ec) + { + if (BOOST_CREATE_DIRECTORY(p.c_str())) + { + if (ec != 0) + ec->clear(); + return true; + } + + // attempt to create directory failed + int errval(BOOST_ERRNO); // save reason for failure + error_code dummy; + + if (is_directory(p, dummy)) + { + if (ec != 0) + ec->clear(); + return false; + } + + // attempt to create directory failed && it doesn't already exist + if (ec == 0) + BOOST_FILESYSTEM_THROW(filesystem_error("boost::filesystem::create_directory", + p, error_code(errval, system_category()))); + else + ec->assign(errval, system_category()); + + return false; + } + + BOOST_FILESYSTEM_DECL + void create_directory_symlink(const path& to, const path& from, + system::error_code* ec) + { +# if defined(BOOST_WINDOWS_API) && _WIN32_WINNT < 0x0600 // SDK earlier than Vista and Server 2008 + + error(BOOST_ERROR_NOT_SUPPORTED, to, from, ec, + "boost::filesystem::create_directory_symlink"); +# else + +# if defined(BOOST_WINDOWS_API) && _WIN32_WINNT >= 0x0600 + // see if actually supported by Windows runtime dll + if (error(!create_symbolic_link_api ? BOOST_ERROR_NOT_SUPPORTED : 0, to, from, ec, + "boost::filesystem::create_directory_symlink")) + return; +# endif + + error(!BOOST_CREATE_SYMBOLIC_LINK(from.c_str(), to.c_str(), + SYMBOLIC_LINK_FLAG_DIRECTORY) ? BOOST_ERRNO : 0, + to, from, ec, "boost::filesystem::create_directory_symlink"); +# endif + } + + BOOST_FILESYSTEM_DECL + void create_hard_link(const path& to, const path& from, error_code* ec) + { + +# if defined(BOOST_WINDOWS_API) && _WIN32_WINNT < 0x0500 // SDK earlier than Win 2K + + error(BOOST_ERROR_NOT_SUPPORTED, to, from, ec, + "boost::filesystem::create_hard_link"); +# else + +# if defined(BOOST_WINDOWS_API) && _WIN32_WINNT >= 0x0500 + // see if actually supported by Windows runtime dll + if (error(!create_hard_link_api ? BOOST_ERROR_NOT_SUPPORTED : 0, to, from, ec, + "boost::filesystem::create_hard_link")) + return; +# endif + + error(!BOOST_CREATE_HARD_LINK(from.c_str(), to.c_str()) ? BOOST_ERRNO : 0, to, from, ec, + "boost::filesystem::create_hard_link"); +# endif + } + + BOOST_FILESYSTEM_DECL + void create_symlink(const path& to, const path& from, error_code* ec) + { +# if defined(BOOST_WINDOWS_API) && _WIN32_WINNT < 0x0600 // SDK earlier than Vista and Server 2008 + error(BOOST_ERROR_NOT_SUPPORTED, to, from, ec, + "boost::filesystem::create_directory_symlink"); +# else + +# if defined(BOOST_WINDOWS_API) && _WIN32_WINNT >= 0x0600 + // see if actually supported by Windows runtime dll + if (error(!create_symbolic_link_api ? BOOST_ERROR_NOT_SUPPORTED : 0, to, from, ec, + "boost::filesystem::create_symlink")) + return; +# endif + + error(!BOOST_CREATE_SYMBOLIC_LINK(from.c_str(), to.c_str(), 0) ? BOOST_ERRNO : 0, + to, from, ec, "boost::filesystem::create_symlink"); +# endif + } + + BOOST_FILESYSTEM_DECL + path current_path(error_code* ec) + { +# ifdef BOOST_POSIX_API + path cur; + for (long path_max = 128;; path_max *=2)// loop 'til buffer large enough + { + boost::scoped_array<char> + buf(new char[static_cast<std::size_t>(path_max)]); + if (::getcwd(buf.get(), static_cast<std::size_t>(path_max))== 0) + { + if (error(errno != ERANGE ? errno : 0 + // bug in some versions of the Metrowerks C lib on the Mac: wrong errno set +# if defined(__MSL__) && (defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)) + && errno != 0 +# endif + , ec, "boost::filesystem::current_path")) + { + break; + } + } + else + { + cur = buf.get(); + if (ec != 0) ec->clear(); + break; + } + } + return cur; + +# else + DWORD sz; + if ((sz = ::GetCurrentDirectoryW(0, NULL)) == 0)sz = 1; + boost::scoped_array<path::value_type> buf(new path::value_type[sz]); + error(::GetCurrentDirectoryW(sz, buf.get()) == 0 ? BOOST_ERRNO : 0, ec, + "boost::filesystem::current_path"); + return path(buf.get()); +# endif + } + + + BOOST_FILESYSTEM_DECL + void current_path(const path& p, system::error_code* ec) + { + error(!BOOST_SET_CURRENT_DIRECTORY(p.c_str()) ? BOOST_ERRNO : 0, + p, ec, "boost::filesystem::current_path"); + } + + BOOST_FILESYSTEM_DECL + bool equivalent(const path& p1, const path& p2, system::error_code* ec) + { +# ifdef BOOST_POSIX_API + struct stat s2; + int e2(::stat(p2.c_str(), &s2)); + struct stat s1; + int e1(::stat(p1.c_str(), &s1)); + + if (e1 != 0 || e2 != 0) + { + // if one is invalid and the other isn't then they aren't equivalent, + // but if both are invalid then it is an error + error (e1 != 0 && e2 != 0, p1, p2, ec, "boost::filesystem::equivalent"); + return false; + } + + // both stats now known to be valid + return s1.st_dev == s2.st_dev && s1.st_ino == s2.st_ino + // According to the POSIX stat specs, "The st_ino and st_dev fields + // taken together uniquely identify the file within the system." + // Just to be sure, size and mod time are also checked. + && s1.st_size == s2.st_size && s1.st_mtime == s2.st_mtime; + +# else // Windows + + // Note well: Physical location on external media is part of the + // equivalence criteria. If there are no open handles, physical location + // can change due to defragmentation or other relocations. Thus handles + // must be held open until location information for both paths has + // been retrieved. + + // p2 is done first, so any error reported is for p1 + handle_wrapper h2( + create_file_handle( + p2.c_str(), + 0, + FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, + 0, + OPEN_EXISTING, + FILE_FLAG_BACKUP_SEMANTICS, + 0)); + + handle_wrapper h1( + create_file_handle( + p1.c_str(), + 0, + FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, + 0, + OPEN_EXISTING, + FILE_FLAG_BACKUP_SEMANTICS, + 0)); + + if (h1.handle == INVALID_HANDLE_VALUE + || h2.handle == INVALID_HANDLE_VALUE) + { + // if one is invalid and the other isn't, then they aren't equivalent, + // but if both are invalid then it is an error + error((h1.handle == INVALID_HANDLE_VALUE + && h2.handle == INVALID_HANDLE_VALUE) ? BOOST_ERROR_NOT_SUPPORTED : 0, p1, p2, ec, + "boost::filesystem::equivalent"); + return false; + } + + // at this point, both handles are known to be valid + + BY_HANDLE_FILE_INFORMATION info1, info2; + + if (error(!::GetFileInformationByHandle(h1.handle, &info1) ? BOOST_ERRNO : 0, + p1, p2, ec, "boost::filesystem::equivalent")) + return false; + + if (error(!::GetFileInformationByHandle(h2.handle, &info2) ? BOOST_ERRNO : 0, + p1, p2, ec, "boost::filesystem::equivalent")) + return false; + + // In theory, volume serial numbers are sufficient to distinguish between + // devices, but in practice VSN's are sometimes duplicated, so last write + // time and file size are also checked. + return + info1.dwVolumeSerialNumber == info2.dwVolumeSerialNumber + && info1.nFileIndexHigh == info2.nFileIndexHigh + && info1.nFileIndexLow == info2.nFileIndexLow + && info1.nFileSizeHigh == info2.nFileSizeHigh + && info1.nFileSizeLow == info2.nFileSizeLow + && info1.ftLastWriteTime.dwLowDateTime + == info2.ftLastWriteTime.dwLowDateTime + && info1.ftLastWriteTime.dwHighDateTime + == info2.ftLastWriteTime.dwHighDateTime; + +# endif + } + + BOOST_FILESYSTEM_DECL + boost::uintmax_t file_size(const path& p, error_code* ec) + { +# ifdef BOOST_POSIX_API + + struct stat path_stat; + if (error(::stat(p.c_str(), &path_stat)!= 0 ? BOOST_ERRNO : 0, + p, ec, "boost::filesystem::file_size")) + return static_cast<boost::uintmax_t>(-1); + if (error(!S_ISREG(path_stat.st_mode) ? EPERM : 0, + p, ec, "boost::filesystem::file_size")) + return static_cast<boost::uintmax_t>(-1); + + return static_cast<boost::uintmax_t>(path_stat.st_size); + +# else // Windows + + // assume uintmax_t is 64-bits on all Windows compilers + + WIN32_FILE_ATTRIBUTE_DATA fad; + + if (error(::GetFileAttributesExW(p.c_str(), ::GetFileExInfoStandard, &fad)== 0 + ? BOOST_ERRNO : 0, p, ec, "boost::filesystem::file_size")) + return static_cast<boost::uintmax_t>(-1); + + if (error((fad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)!= 0 + ? ERROR_NOT_SUPPORTED : 0, p, ec, "boost::filesystem::file_size")) + return static_cast<boost::uintmax_t>(-1); + + return (static_cast<boost::uintmax_t>(fad.nFileSizeHigh) + << (sizeof(fad.nFileSizeLow)*8)) + fad.nFileSizeLow; +# endif + } + + BOOST_FILESYSTEM_DECL + boost::uintmax_t hard_link_count(const path& p, system::error_code* ec) + { +# ifdef BOOST_POSIX_API + + struct stat path_stat; + return error(::stat(p.c_str(), &path_stat)!= 0 ? BOOST_ERRNO : 0, + p, ec, "boost::filesystem::hard_link_count") + ? 0 + : static_cast<boost::uintmax_t>(path_stat.st_nlink); + +# else // Windows + + // Link count info is only available through GetFileInformationByHandle + BY_HANDLE_FILE_INFORMATION info; + handle_wrapper h( + create_file_handle(p.c_str(), 0, + FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, 0, + OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0)); + return + !error(h.handle == INVALID_HANDLE_VALUE ? BOOST_ERRNO : 0, + p, ec, "boost::filesystem::hard_link_count") + && !error(::GetFileInformationByHandle(h.handle, &info)== 0 ? BOOST_ERRNO : 0, + p, ec, "boost::filesystem::hard_link_count") + ? info.nNumberOfLinks + : 0; +# endif + } + + BOOST_FILESYSTEM_DECL + path initial_path(error_code* ec) + { + static path init_path; + if (init_path.empty()) + init_path = current_path(ec); + else if (ec != 0) ec->clear(); + return init_path; + } + + BOOST_FILESYSTEM_DECL + bool is_empty(const path& p, system::error_code* ec) + { +# ifdef BOOST_POSIX_API + + struct stat path_stat; + if (error(::stat(p.c_str(), &path_stat)!= 0, + p, ec, "boost::filesystem::is_empty")) + return false; + return S_ISDIR(path_stat.st_mode) + ? is_empty_directory(p, ec) + : path_stat.st_size == 0; +# else + + WIN32_FILE_ATTRIBUTE_DATA fad; + if (error(::GetFileAttributesExW(p.c_str(), ::GetFileExInfoStandard, &fad)== 0 + ? BOOST_ERRNO : 0, p, ec, "boost::filesystem::is_empty")) + return false; + + if (ec != 0) ec->clear(); + return + (fad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) + ? is_empty_directory(p, ec) + : (!fad.nFileSizeHigh && !fad.nFileSizeLow); +# endif + } + + BOOST_FILESYSTEM_DECL + std::time_t last_write_time(const path& p, system::error_code* ec) + { +# ifdef BOOST_POSIX_API + + struct stat path_stat; + if (error(::stat(p.c_str(), &path_stat)!= 0 ? BOOST_ERRNO : 0, + p, ec, "boost::filesystem::last_write_time")) + return std::time_t(-1); + return path_stat.st_mtime; + +# else + + handle_wrapper hw( + create_file_handle(p.c_str(), 0, + FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, 0, + OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0)); + + if (error(hw.handle == INVALID_HANDLE_VALUE ? BOOST_ERRNO : 0, + p, ec, "boost::filesystem::last_write_time")) + return std::time_t(-1); + + FILETIME lwt; + + if (error(::GetFileTime(hw.handle, 0, 0, &lwt)== 0 ? BOOST_ERRNO : 0, + p, ec, "boost::filesystem::last_write_time")) + return std::time_t(-1); + + return to_time_t(lwt); +# endif + } + + BOOST_FILESYSTEM_DECL + void last_write_time(const path& p, const std::time_t new_time, + system::error_code* ec) + { +# ifdef BOOST_POSIX_API + + struct stat path_stat; + if (error(::stat(p.c_str(), &path_stat)!= 0, + p, ec, "boost::filesystem::last_write_time")) + return; + ::utimbuf buf; + buf.actime = path_stat.st_atime; // utime()updates access time too:-( + buf.modtime = new_time; + error(::utime(p.c_str(), &buf)!= 0 ? BOOST_ERRNO : 0, + p, ec, "boost::filesystem::last_write_time"); + +# else + + handle_wrapper hw( + create_file_handle(p.c_str(), FILE_WRITE_ATTRIBUTES, + FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, 0, + OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0)); + + if (error(hw.handle == INVALID_HANDLE_VALUE ? BOOST_ERRNO : 0, + p, ec, "boost::filesystem::last_write_time")) + return; + + FILETIME lwt; + to_FILETIME(new_time, lwt); + + error(::SetFileTime(hw.handle, 0, 0, &lwt)== 0 ? BOOST_ERRNO : 0, + p, ec, "boost::filesystem::last_write_time"); +# endif + } + +# ifdef BOOST_POSIX_API + const perms active_bits(all_all | set_uid_on_exe | set_gid_on_exe | sticky_bit); + inline mode_t mode_cast(perms prms) { return prms & active_bits; } +# endif + + BOOST_FILESYSTEM_DECL + void permissions(const path& p, perms prms, system::error_code* ec) + { + BOOST_ASSERT_MSG(!((prms & add_perms) && (prms & remove_perms)), + "add_perms and remove_perms are mutually exclusive"); + + if ((prms & add_perms) && (prms & remove_perms)) // precondition failed + return; + +# ifdef BOOST_POSIX_API + error_code local_ec; + file_status current_status((prms & symlink_perms) + ? fs::symlink_status(p, local_ec) + : fs::status(p, local_ec)); + if (local_ec) + { + if (ec == 0) + BOOST_FILESYSTEM_THROW(filesystem_error( + "boost::filesystem::permissions", p, local_ec)); + else + *ec = local_ec; + return; + } + + if (prms & add_perms) + prms |= current_status.permissions(); + else if (prms & remove_perms) + prms = current_status.permissions() & ~prms; + + // OS X <10.10, iOS <8.0 and some other platforms don't support fchmodat(). + // Solaris (SunPro and gcc) only support fchmodat() on Solaris 11 and higher, + // and a runtime check is too much trouble. + // Linux does not support permissions on symbolic links and has no plans to + // support them in the future. The chmod() code is thus more practical, + // rather than always hitting ENOTSUP when sending in AT_SYMLINK_NO_FOLLOW. + // - See the 3rd paragraph of + // "Symbolic link ownership, permissions, and timestamps" at: + // "http://man7.org/linux/man-pages/man7/symlink.7.html" + // - See the fchmodat() Linux man page: + // "http://man7.org/linux/man-pages/man2/fchmodat.2.html" +# if defined(AT_FDCWD) && defined(AT_SYMLINK_NOFOLLOW) \ + && !(defined(__SUNPRO_CC) || defined(__sun) || defined(sun)) \ + && !(defined(linux) || defined(__linux) || defined(__linux__)) \ + && !(defined(__MAC_OS_X_VERSION_MIN_REQUIRED) \ + && __MAC_OS_X_VERSION_MIN_REQUIRED < 101000) \ + && !(defined(__IPHONE_OS_VERSION_MIN_REQUIRED) \ + && __IPHONE_OS_VERSION_MIN_REQUIRED < 80000) \ + && !(defined(__QNX__) && (_NTO_VERSION <= 700)) + if (::fchmodat(AT_FDCWD, p.c_str(), mode_cast(prms), + !(prms & symlink_perms) ? 0 : AT_SYMLINK_NOFOLLOW)) +# else // fallback if fchmodat() not supported + if (::chmod(p.c_str(), mode_cast(prms))) +# endif + { + if (ec == 0) + BOOST_FILESYSTEM_THROW(filesystem_error( + "boost::filesystem::permissions", p, + error_code(errno, system::generic_category()))); + else + ec->assign(errno, system::generic_category()); + } + +# else // Windows + + // if not going to alter FILE_ATTRIBUTE_READONLY, just return + if (!(!((prms & (add_perms | remove_perms))) + || (prms & (owner_write|group_write|others_write)))) + return; + + DWORD attr = ::GetFileAttributesW(p.c_str()); + + if (error(attr == 0 ? BOOST_ERRNO : 0, p, ec, "boost::filesystem::permissions")) + return; + + if (prms & add_perms) + attr &= ~FILE_ATTRIBUTE_READONLY; + else if (prms & remove_perms) + attr |= FILE_ATTRIBUTE_READONLY; + else if (prms & (owner_write|group_write|others_write)) + attr &= ~FILE_ATTRIBUTE_READONLY; + else + attr |= FILE_ATTRIBUTE_READONLY; + + error(::SetFileAttributesW(p.c_str(), attr) == 0 ? BOOST_ERRNO : 0, + p, ec, "boost::filesystem::permissions"); +# endif + } + + BOOST_FILESYSTEM_DECL + path read_symlink(const path& p, system::error_code* ec) + { + path symlink_path; + +# ifdef BOOST_POSIX_API + + for (std::size_t path_max = 64;; path_max *= 2)// loop 'til buffer large enough + { + boost::scoped_array<char> buf(new char[path_max]); + ssize_t result; + if ((result=::readlink(p.c_str(), buf.get(), path_max))== -1) + { + if (ec == 0) + BOOST_FILESYSTEM_THROW(filesystem_error("boost::filesystem::read_symlink", + p, error_code(errno, system_category()))); + else ec->assign(errno, system_category()); + break; + } + else + { + if(result != static_cast<ssize_t>(path_max)) + { + symlink_path.assign(buf.get(), buf.get() + result); + if (ec != 0) ec->clear(); + break; + } + } + } + +# elif _WIN32_WINNT < 0x0600 // SDK earlier than Vista and Server 2008 + error(BOOST_ERROR_NOT_SUPPORTED, p, ec, + "boost::filesystem::read_symlink"); +# else // Vista and Server 2008 SDK, or later + + union info_t + { + char buf[REPARSE_DATA_BUFFER_HEADER_SIZE+MAXIMUM_REPARSE_DATA_BUFFER_SIZE]; + REPARSE_DATA_BUFFER rdb; + } info; + + handle_wrapper h( + create_file_handle(p.c_str(), GENERIC_READ, 0, 0, OPEN_EXISTING, + FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT, 0)); + + if (error(h.handle == INVALID_HANDLE_VALUE ? BOOST_ERRNO : 0, + p, ec, "boost::filesystem::read_symlink")) + return symlink_path; + + DWORD sz; + + if (!error(::DeviceIoControl(h.handle, FSCTL_GET_REPARSE_POINT, + 0, 0, info.buf, sizeof(info), &sz, 0) == 0 ? BOOST_ERRNO : 0, p, ec, + "boost::filesystem::read_symlink" )) + symlink_path.assign( + static_cast<wchar_t*>(info.rdb.SymbolicLinkReparseBuffer.PathBuffer) + + info.rdb.SymbolicLinkReparseBuffer.PrintNameOffset/sizeof(wchar_t), + static_cast<wchar_t*>(info.rdb.SymbolicLinkReparseBuffer.PathBuffer) + + info.rdb.SymbolicLinkReparseBuffer.PrintNameOffset/sizeof(wchar_t) + + info.rdb.SymbolicLinkReparseBuffer.PrintNameLength/sizeof(wchar_t)); +# endif + return symlink_path; + } + + BOOST_FILESYSTEM_DECL + path relative(const path& p, const path& base, error_code* ec) + { + error_code tmp_ec; + path wc_base(weakly_canonical(base, &tmp_ec)); + if (error(tmp_ec.value(), base, ec, "boost::filesystem::relative")) + return path(); + path wc_p(weakly_canonical(p, &tmp_ec)); + if (error(tmp_ec.value(), base, ec, "boost::filesystem::relative")) + return path(); + return wc_p.lexically_relative(wc_base); + } + + BOOST_FILESYSTEM_DECL + bool remove(const path& p, error_code* ec) + { + error_code tmp_ec; + file_type type = query_file_type(p, &tmp_ec); + if (error(type == status_error ? tmp_ec.value() : 0, p, ec, + "boost::filesystem::remove")) + return false; + + // Since POSIX remove() is specified to work with either files or directories, in a + // perfect world it could just be called. But some important real-world operating + // systems (Windows, Mac OS X, for example) don't implement the POSIX spec. So + // remove_file_or_directory() is always called to keep it simple. + return remove_file_or_directory(p, type, ec); + } + + BOOST_FILESYSTEM_DECL + boost::uintmax_t remove_all(const path& p, error_code* ec) + { + error_code tmp_ec; + file_type type = query_file_type(p, &tmp_ec); + if (error(type == status_error ? tmp_ec.value() : 0, p, ec, + "boost::filesystem::remove_all")) + return 0; + + return (type != status_error && type != file_not_found) // exists + ? remove_all_aux(p, type, ec) + : 0; + } + + BOOST_FILESYSTEM_DECL + void rename(const path& old_p, const path& new_p, error_code* ec) + { + error(!BOOST_MOVE_FILE(old_p.c_str(), new_p.c_str()) ? BOOST_ERRNO : 0, old_p, new_p, + ec, "boost::filesystem::rename"); + } + + BOOST_FILESYSTEM_DECL + void resize_file(const path& p, uintmax_t size, system::error_code* ec) + { +# if defined(BOOST_POSIX_API) + if (BOOST_UNLIKELY(size > static_cast< uintmax_t >((std::numeric_limits< off_t >::max)()))) { + error(system::errc::file_too_large, p, ec, "boost::filesystem::resize_file"); + return; + } +# endif + error(!BOOST_RESIZE_FILE(p.c_str(), size) ? BOOST_ERRNO : 0, p, ec, + "boost::filesystem::resize_file"); + } + + BOOST_FILESYSTEM_DECL + space_info space(const path& p, error_code* ec) + { +# ifdef BOOST_POSIX_API + struct BOOST_STATVFS vfs; + space_info info; + if (!error(::BOOST_STATVFS(p.c_str(), &vfs) ? BOOST_ERRNO : 0, + p, ec, "boost::filesystem::space")) + { + info.capacity + = static_cast<boost::uintmax_t>(vfs.f_blocks)* BOOST_STATVFS_F_FRSIZE; + info.free + = static_cast<boost::uintmax_t>(vfs.f_bfree)* BOOST_STATVFS_F_FRSIZE; + info.available + = static_cast<boost::uintmax_t>(vfs.f_bavail)* BOOST_STATVFS_F_FRSIZE; + } + +# else + ULARGE_INTEGER avail, total, free; + space_info info; + + if (!error(::GetDiskFreeSpaceExW(p.c_str(), &avail, &total, &free)== 0, + p, ec, "boost::filesystem::space")) + { + info.capacity + = (static_cast<boost::uintmax_t>(total.HighPart)<< 32) + + total.LowPart; + info.free + = (static_cast<boost::uintmax_t>(free.HighPart)<< 32) + + free.LowPart; + info.available + = (static_cast<boost::uintmax_t>(avail.HighPart)<< 32) + + avail.LowPart; + } + +# endif + + else + { + info.capacity = info.free = info.available = 0; + } + return info; + } + + BOOST_FILESYSTEM_DECL + file_status status(const path& p, error_code* ec) + { +# ifdef BOOST_POSIX_API + + struct stat path_stat; + if (::stat(p.c_str(), &path_stat)!= 0) + { + if (ec != 0) // always report errno, even though some + ec->assign(errno, system_category()); // errno values are not status_errors + + if (not_found_error(errno)) + { + return fs::file_status(fs::file_not_found, fs::no_perms); + } + if (ec == 0) + BOOST_FILESYSTEM_THROW(filesystem_error("boost::filesystem::status", + p, error_code(errno, system_category()))); + return fs::file_status(fs::status_error); + } + if (ec != 0) ec->clear();; + if (S_ISDIR(path_stat.st_mode)) + return fs::file_status(fs::directory_file, + static_cast<perms>(path_stat.st_mode) & fs::perms_mask); + if (S_ISREG(path_stat.st_mode)) + return fs::file_status(fs::regular_file, + static_cast<perms>(path_stat.st_mode) & fs::perms_mask); + if (S_ISBLK(path_stat.st_mode)) + return fs::file_status(fs::block_file, + static_cast<perms>(path_stat.st_mode) & fs::perms_mask); + if (S_ISCHR(path_stat.st_mode)) + return fs::file_status(fs::character_file, + static_cast<perms>(path_stat.st_mode) & fs::perms_mask); + if (S_ISFIFO(path_stat.st_mode)) + return fs::file_status(fs::fifo_file, + static_cast<perms>(path_stat.st_mode) & fs::perms_mask); + if (S_ISSOCK(path_stat.st_mode)) + return fs::file_status(fs::socket_file, + static_cast<perms>(path_stat.st_mode) & fs::perms_mask); + return fs::file_status(fs::type_unknown); + +# else // Windows + + DWORD attr(::GetFileAttributesW(p.c_str())); + if (attr == 0xFFFFFFFF) + { + return process_status_failure(p, ec); + } + + // reparse point handling; + // since GetFileAttributesW does not resolve symlinks, try to open a file + // handle to discover if the file exists + if (attr & FILE_ATTRIBUTE_REPARSE_POINT) + { + handle_wrapper h( + create_file_handle( + p.c_str(), + 0, // dwDesiredAccess; attributes only + FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, + 0, // lpSecurityAttributes + OPEN_EXISTING, + FILE_FLAG_BACKUP_SEMANTICS, + 0)); // hTemplateFile + if (h.handle == INVALID_HANDLE_VALUE) + { + return process_status_failure(p, ec); + } + + if (!is_reparse_point_a_symlink(p)) + return file_status(reparse_file, make_permissions(p, attr)); + } + + if (ec != 0) ec->clear(); + return (attr & FILE_ATTRIBUTE_DIRECTORY) + ? file_status(directory_file, make_permissions(p, attr)) + : file_status(regular_file, make_permissions(p, attr)); + +# endif + } + + BOOST_FILESYSTEM_DECL + file_status symlink_status(const path& p, error_code* ec) + { +# ifdef BOOST_POSIX_API + + struct stat path_stat; + if (::lstat(p.c_str(), &path_stat)!= 0) + { + if (ec != 0) // always report errno, even though some + ec->assign(errno, system_category()); // errno values are not status_errors + + if (errno == ENOENT || errno == ENOTDIR) // these are not errors + { + return fs::file_status(fs::file_not_found, fs::no_perms); + } + if (ec == 0) + BOOST_FILESYSTEM_THROW(filesystem_error("boost::filesystem::status", + p, error_code(errno, system_category()))); + return fs::file_status(fs::status_error); + } + if (ec != 0) ec->clear(); + if (S_ISREG(path_stat.st_mode)) + return fs::file_status(fs::regular_file, + static_cast<perms>(path_stat.st_mode) & fs::perms_mask); + if (S_ISDIR(path_stat.st_mode)) + return fs::file_status(fs::directory_file, + static_cast<perms>(path_stat.st_mode) & fs::perms_mask); + if (S_ISLNK(path_stat.st_mode)) + return fs::file_status(fs::symlink_file, + static_cast<perms>(path_stat.st_mode) & fs::perms_mask); + if (S_ISBLK(path_stat.st_mode)) + return fs::file_status(fs::block_file, + static_cast<perms>(path_stat.st_mode) & fs::perms_mask); + if (S_ISCHR(path_stat.st_mode)) + return fs::file_status(fs::character_file, + static_cast<perms>(path_stat.st_mode) & fs::perms_mask); + if (S_ISFIFO(path_stat.st_mode)) + return fs::file_status(fs::fifo_file, + static_cast<perms>(path_stat.st_mode) & fs::perms_mask); + if (S_ISSOCK(path_stat.st_mode)) + return fs::file_status(fs::socket_file, + static_cast<perms>(path_stat.st_mode) & fs::perms_mask); + return fs::file_status(fs::type_unknown); + +# else // Windows + + DWORD attr(::GetFileAttributesW(p.c_str())); + if (attr == 0xFFFFFFFF) + { + return process_status_failure(p, ec); + } + + if (ec != 0) ec->clear(); + + if (attr & FILE_ATTRIBUTE_REPARSE_POINT) + return is_reparse_point_a_symlink(p) + ? file_status(symlink_file, make_permissions(p, attr)) + : file_status(reparse_file, make_permissions(p, attr)); + + return (attr & FILE_ATTRIBUTE_DIRECTORY) + ? file_status(directory_file, make_permissions(p, attr)) + : file_status(regular_file, make_permissions(p, attr)); + +# endif + } + + // contributed by Jeff Flinn + BOOST_FILESYSTEM_DECL + path temp_directory_path(system::error_code* ec) + { +# ifdef BOOST_POSIX_API + const char* val = 0; + + (val = std::getenv("TMPDIR" )) || + (val = std::getenv("TMP" )) || + (val = std::getenv("TEMP" )) || + (val = std::getenv("TEMPDIR")); + +# ifdef __ANDROID__ + const char* default_tmp = "/data/local/tmp"; +# else + const char* default_tmp = "/tmp"; +# endif + path p((val!=0) ? val : default_tmp); + + if (p.empty() || (ec&&!is_directory(p, *ec))||(!ec&&!is_directory(p))) + { + error(ENOTDIR, p, ec, "boost::filesystem::temp_directory_path"); + return p; + } + + return p; + +# else // Windows + + const wchar_t* tmp_env = L"TMP"; + const wchar_t* temp_env = L"TEMP"; + const wchar_t* localappdata_env = L"LOCALAPPDATA"; + const wchar_t* userprofile_env = L"USERPROFILE"; + const wchar_t* env_list[] + = {tmp_env, temp_env, localappdata_env, userprofile_env, 0}; + + path p; + for (int i = 0; env_list[i]; ++i) + { + std::wstring env = wgetenv(env_list[i]); + if (!env.empty()) + { + p = env; + if (i >= 2) + p /= L"Temp"; + error_code lcl_ec; + if (exists(p, lcl_ec) && !lcl_ec && is_directory(p, lcl_ec) && !lcl_ec) + break; + p.clear(); + } + } + + if (p.empty()) + { + // use vector since in C++03 a string is not required to be contiguous + std::vector<wchar_t> buf(::GetWindowsDirectoryW(NULL, 0)); + + if (buf.empty() + || ::GetWindowsDirectoryW(&buf[0], static_cast<UINT>(buf.size())) == 0) + { + error(::GetLastError(), ec, "boost::filesystem::temp_directory_path"); + return path(); + } + p = &*buf.begin(); // do not depend on buf.size(); see ticket #10388 + p /= L"Temp"; + } + return p; + +# endif + } + + BOOST_FILESYSTEM_DECL + path system_complete(const path& p, system::error_code* ec) + { +# ifdef BOOST_POSIX_API + return (p.empty() || p.is_absolute()) + ? p : current_path()/ p; + +# else + if (p.empty()) + { + if (ec != 0) ec->clear(); + return p; + } + wchar_t buf[buf_size]; + wchar_t* pfn; + std::size_t len = get_full_path_name(p, buf_size, buf, &pfn); + + if (error(len == 0 ? BOOST_ERRNO : 0, p, ec, "boost::filesystem::system_complete")) + return path(); + + if (len < buf_size)// len does not include null termination character + return path(&buf[0]); + + boost::scoped_array<wchar_t> big_buf(new wchar_t[len]); + + return error(get_full_path_name(p, len , big_buf.get(), &pfn)== 0 ? BOOST_ERRNO : 0, + p, ec, "boost::filesystem::system_complete") + ? path() + : path(big_buf.get()); +# endif + } + + BOOST_FILESYSTEM_DECL + path weakly_canonical(const path& p, system::error_code* ec) + { + path head(p); + path tail; + system::error_code tmp_ec; + path::iterator itr = p.end(); + + for (; !head.empty(); --itr) + { + file_status head_status = status(head, tmp_ec); + if (error(head_status.type() == fs::status_error, + head, ec, "boost::filesystem::weakly_canonical")) + return path(); + if (head_status.type() != fs::file_not_found) + break; + head.remove_filename(); + } + + bool tail_has_dots = false; + for (; itr != p.end(); ++itr) + { + tail /= *itr; + // for a later optimization, track if any dot or dot-dot elements are present + if (itr->native().size() <= 2 + && itr->native()[0] == dot + && (itr->native().size() == 1 || itr->native()[1] == dot)) + tail_has_dots = true; + } + + if (head.empty()) + return p.lexically_normal(); + head = canonical(head, tmp_ec); + if (error(tmp_ec.value(), head, ec, "boost::filesystem::weakly_canonical")) + return path(); + return tail.empty() + ? head + : (tail_has_dots // optimization: only normalize if tail had dot or dot-dot element + ? (head/tail).lexically_normal() + : head/tail); + } +} // namespace detail + +//--------------------------------------------------------------------------------------// +// // +// directory_entry // +// // +//--------------------------------------------------------------------------------------// + + file_status + directory_entry::m_get_status(system::error_code* ec) const + { + if (!status_known(m_status)) + { + // optimization: if the symlink status is known, and it isn't a symlink, + // then status and symlink_status are identical so just copy the + // symlink status to the regular status. + if (status_known(m_symlink_status) + && !is_symlink(m_symlink_status)) + { + m_status = m_symlink_status; + if (ec != 0) ec->clear(); + } + else m_status = detail::status(m_path, ec); + } + else if (ec != 0) ec->clear(); + return m_status; + } + + file_status + directory_entry::m_get_symlink_status(system::error_code* ec) const + { + if (!status_known(m_symlink_status)) + m_symlink_status = detail::symlink_status(m_path, ec); + else if (ec != 0) ec->clear(); + return m_symlink_status; + } + +// dispatch directory_entry supplied here rather than in +// <boost/filesystem/path_traits.hpp>, thus avoiding header circularity. +// test cases are in operations_unit_test.cpp + +namespace path_traits +{ + void dispatch(const directory_entry & de, +# ifdef BOOST_WINDOWS_API + std::wstring& to, +# else + std::string& to, +# endif + const codecvt_type &) + { + to = de.path().native(); + } + + void dispatch(const directory_entry & de, +# ifdef BOOST_WINDOWS_API + std::wstring& to +# else + std::string& to +# endif + ) + { + to = de.path().native(); + } +} // namespace path_traits +} // namespace filesystem +} // namespace boost + +//--------------------------------------------------------------------------------------// +// // +// directory_iterator // +// // +//--------------------------------------------------------------------------------------// + +namespace +{ +# ifdef BOOST_POSIX_API + + error_code path_max(std::size_t & result) + // this code is based on Stevens and Rago, Advanced Programming in the + // UNIX envirnment, 2nd Ed., ISBN 0-201-43307-9, page 49 + { +# ifdef PATH_MAX + static std::size_t max = PATH_MAX; +# else + static std::size_t max = 0; +# endif + if (max == 0) + { + errno = 0; + long tmp = ::pathconf("/", _PC_NAME_MAX); + if (tmp < 0) + { + if (errno == 0)// indeterminate + max = 4096; // guess + else return error_code(errno, system_category()); + } + else max = static_cast<std::size_t>(tmp + 1); // relative root + } + result = max; + return ok; + } + + error_code dir_itr_first(void *& handle, void *& buffer, + const char* dir, string& target, + fs::file_status &, fs::file_status &) + { + if ((handle = ::opendir(dir))== 0) + return error_code(errno, system_category()); + target = string("."); // string was static but caused trouble + // when iteration called from dtor, after + // static had already been destroyed + std::size_t path_size (0); // initialization quiets gcc warning (ticket #3509) + error_code ec = path_max(path_size); + if (ec)return ec; + dirent de; + buffer = std::malloc((sizeof(dirent) - sizeof(de.d_name)) + + path_size + 1); // + 1 for "/0" + return ok; + } + + // warning: the only dirent member updated is d_name + inline int readdir_r_simulator(DIR * dirp, struct dirent * entry, + struct dirent ** result)// *result set to 0 on end of directory + { +# if !defined(__CYGWIN__)\ + && defined(_POSIX_THREAD_SAFE_FUNCTIONS)\ + && defined(_SC_THREAD_SAFE_FUNCTIONS)\ + && (_POSIX_THREAD_SAFE_FUNCTIONS+0 >= 0)\ + && !(defined(linux) || defined(__linux) || defined(__linux__))\ + && !defined(__ANDROID__)\ + && (!defined(__hpux) || defined(_REENTRANT)) \ + && (!defined(_AIX) || defined(__THREAD_SAFE)) + + errno = 0; + + if (::sysconf(_SC_THREAD_SAFE_FUNCTIONS)>= 0) + { return ::readdir_r(dirp, entry, result); } +# endif + + errno = 0; + + struct dirent * p; + *result = 0; + if ((p = ::readdir(dirp))== 0) + return errno; + std::strcpy(entry->d_name, p->d_name); + *result = entry; + return 0; + } + + error_code dir_itr_increment(void *& handle, void *& buffer, + string& target, fs::file_status & sf, fs::file_status & symlink_sf) + { + BOOST_ASSERT(buffer != 0); + dirent * entry(static_cast<dirent *>(buffer)); + dirent * result; + int return_code; + if ((return_code = readdir_r_simulator(static_cast<DIR*>(handle), entry, &result))!= 0) + return error_code(errno, system_category()); + if (result == 0) + return fs::detail::dir_itr_close(handle, buffer); + target = entry->d_name; +# ifdef BOOST_FILESYSTEM_STATUS_CACHE + if (entry->d_type == DT_UNKNOWN) // filesystem does not supply d_type value + { + sf = symlink_sf = fs::file_status(fs::status_error); + } + else // filesystem supplies d_type value + { + if (entry->d_type == DT_DIR) + sf = symlink_sf = fs::file_status(fs::directory_file); + else if (entry->d_type == DT_REG) + sf = symlink_sf = fs::file_status(fs::regular_file); + else if (entry->d_type == DT_LNK) + { + sf = fs::file_status(fs::status_error); + symlink_sf = fs::file_status(fs::symlink_file); + } + else sf = symlink_sf = fs::file_status(fs::status_error); + } +# else + sf = symlink_sf = fs::file_status(fs::status_error); +# endif + return ok; + } + +# else // BOOST_WINDOWS_API + + error_code dir_itr_first(void *& handle, const fs::path& dir, + wstring& target, fs::file_status & sf, fs::file_status & symlink_sf) + // Note: an empty root directory has no "." or ".." entries, so this + // causes a ERROR_FILE_NOT_FOUND error which we do not considered an + // error. It is treated as eof instead. + { + // use a form of search Sebastian Martel reports will work with Win98 + wstring dirpath(dir.wstring()); + dirpath += (dirpath.empty() + || (dirpath[dirpath.size()-1] != L'\\' + && dirpath[dirpath.size()-1] != L'/' + && dirpath[dirpath.size()-1] != L':'))? L"\\*" : L"*"; + + WIN32_FIND_DATAW data; + if ((handle = ::FindFirstFileW(dirpath.c_str(), &data)) + == INVALID_HANDLE_VALUE) + { + handle = 0; // signal eof + return error_code( (::GetLastError() == ERROR_FILE_NOT_FOUND + // Windows Mobile returns ERROR_NO_MORE_FILES; see ticket #3551 + || ::GetLastError() == ERROR_NO_MORE_FILES) + ? 0 : ::GetLastError(), system_category() ); + } + target = data.cFileName; + if (data.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) + // reparse points are complex, so don't try to handle them here; instead just mark + // them as status_error which causes directory_entry caching to call status() + // and symlink_status() which do handle reparse points fully + { + sf.type(fs::status_error); + symlink_sf.type(fs::status_error); + } + else + { + if (data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) + { + sf.type(fs::directory_file); + symlink_sf.type(fs::directory_file); + } + else + { + sf.type(fs::regular_file); + symlink_sf.type(fs::regular_file); + } + sf.permissions(make_permissions(data.cFileName, data.dwFileAttributes)); + symlink_sf.permissions(sf.permissions()); + } + return error_code(); + } + + error_code dir_itr_increment(void *& handle, wstring& target, + fs::file_status & sf, fs::file_status & symlink_sf) + { + WIN32_FIND_DATAW data; + if (::FindNextFileW(handle, &data)== 0)// fails + { + int error = ::GetLastError(); + fs::detail::dir_itr_close(handle); + return error_code(error == ERROR_NO_MORE_FILES ? 0 : error, system_category()); + } + target = data.cFileName; + if (data.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) + // reparse points are complex, so don't try to handle them here; instead just mark + // them as status_error which causes directory_entry caching to call status() + // and symlink_status() which do handle reparse points fully + { + sf.type(fs::status_error); + symlink_sf.type(fs::status_error); + } + else + { + if (data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) + { + sf.type(fs::directory_file); + symlink_sf.type(fs::directory_file); + } + else + { + sf.type(fs::regular_file); + symlink_sf.type(fs::regular_file); + } + sf.permissions(make_permissions(data.cFileName, data.dwFileAttributes)); + symlink_sf.permissions(sf.permissions()); + } + return error_code(); + } +#endif + + const error_code not_found_error_code ( +# ifdef BOOST_WINDOWS_API + ERROR_PATH_NOT_FOUND +# else + ENOENT +# endif + , system_category()); + +} // unnamed namespace + +namespace boost +{ +namespace filesystem +{ + +namespace detail +{ + // dir_itr_close is called both from the ~dir_itr_imp()destructor + // and dir_itr_increment() + BOOST_FILESYSTEM_DECL + system::error_code dir_itr_close( // never throws + void *& handle +# if defined(BOOST_POSIX_API) + , void *& buffer +# endif + ) + { +# ifdef BOOST_POSIX_API + std::free(buffer); + buffer = 0; + if (handle == 0)return ok; + DIR * h(static_cast<DIR*>(handle)); + handle = 0; + return error_code(::closedir(h)== 0 ? 0 : errno, system_category()); + +# else + if (handle != 0) + { + ::FindClose(handle); + handle = 0; + } + return ok; + +# endif + } + + void directory_iterator_construct(directory_iterator& it, + const path& p, system::error_code* ec) + { + if (error(p.empty() ? not_found_error_code.value() : 0, p, ec, + "boost::filesystem::directory_iterator::construct")) + return; + + path::string_type filename; + file_status file_stat, symlink_file_stat; + error_code result = dir_itr_first(it.m_imp->handle, +# if defined(BOOST_POSIX_API) + it.m_imp->buffer, +# endif + p.c_str(), filename, file_stat, symlink_file_stat); + + if (result) + { + it.m_imp.reset(); + error(result.value(), p, + ec, "boost::filesystem::directory_iterator::construct"); + return; + } + + if (it.m_imp->handle == 0) + it.m_imp.reset(); // eof, so make end iterator + else // not eof + { + it.m_imp->dir_entry.assign(p / filename, file_stat, symlink_file_stat); + if (filename[0] == dot // dot or dot-dot + && (filename.size()== 1 + || (filename[1] == dot + && filename.size()== 2))) + { detail::directory_iterator_increment(it, ec); } + } + } + + void directory_iterator_increment(directory_iterator& it, + system::error_code* ec) + { + BOOST_ASSERT_MSG(it.m_imp.get(), "attempt to increment end iterator"); + BOOST_ASSERT_MSG(it.m_imp->handle != 0, "internal program error"); + + path::string_type filename; + file_status file_stat, symlink_file_stat; + system::error_code temp_ec; + + for (;;) + { + temp_ec = dir_itr_increment(it.m_imp->handle, +# if defined(BOOST_POSIX_API) + it.m_imp->buffer, +# endif + filename, file_stat, symlink_file_stat); + + if (temp_ec) // happens if filesystem is corrupt, such as on a damaged optical disc + { + path error_path(it.m_imp->dir_entry.path().parent_path()); // fix ticket #5900 + it.m_imp.reset(); + if (ec == 0) + BOOST_FILESYSTEM_THROW( + filesystem_error("boost::filesystem::directory_iterator::operator++", + error_path, + error_code(BOOST_ERRNO, system_category()))); + ec->assign(BOOST_ERRNO, system_category()); + return; + } + else if (ec != 0) ec->clear(); + + if (it.m_imp->handle == 0) // eof, make end + { + it.m_imp.reset(); + return; + } + + if (!(filename[0] == dot // !(dot or dot-dot) + && (filename.size()== 1 + || (filename[1] == dot + && filename.size()== 2)))) + { + it.m_imp->dir_entry.replace_filename( + filename, file_stat, symlink_file_stat); + return; + } + } + } +} // namespace detail +} // namespace filesystem +} // namespace boost |