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nest-open-source / nest-learning-thermostat / 5.0 / boost / 317601cb979f96545d0e892ce7cfdf59f676ee0a / . / boost_1_45_0 / libs / filesystem / v3 / src / operations.cpp
blob: 1e9651bf1c20a33cf052cce1f96889362c4b2291 [file] [log] [blame]
// operations.cpp --------------------------------------------------------------------//
// Copyright 2002-2009 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
//--------------------------------------------------------------------------------------//
#include <boost/config.hpp>
#if !defined( BOOST_NO_STD_WSTRING )
// Boost.Filesystem V3 and later requires std::wstring support.
// During the transition to V3, libraries are compiled with both V2 and V3 sources.
// On old compilers that don't support V3 anyhow, we just skip everything so the compile
// will succeed and the library can be built.
// 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
#if !(defined(__HP_aCC) && defined(_ILP32) && \
!defined(_STATVFS_ACPP_PROBLEMS_FIXED))
#define _FILE_OFFSET_BITS 64 // at worst, these defines may have no effect,
#endif
#define __USE_FILE_OFFSET64 // but that is harmless on Windows and on POSIX
// 64-bit systems or on 32-bit systems which don't have files larger
// than can be represented by a traditional POSIX/UNIX off_t type.
// OTOH, defining them 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.
// The defines are given before any headers are included to
// ensure that they are available to all included headers.
// That is required at least on Solaris, and possibly on other
// systems as well.
#include <boost/filesystem/v3/operations.hpp>
#include <boost/scoped_array.hpp>
#include <boost/detail/workaround.hpp>
#include <cstdlib> // for malloc, free
#ifdef BOOST_FILEYSTEM_INCLUDE_IOSTREAM
# include <iostream>
#endif
namespace fs = boost::filesystem3;
using boost::filesystem3::path;
using boost::filesystem3::filesystem_error;
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>
# if !defined(__APPLE__) && !defined(__OpenBSD__)
# include <sys/statvfs.h>
# define BOOST_STATVFS statvfs
# define BOOST_STATVFS_F_FRSIZE vfs.f_frsize
# else
# ifdef __OpenBSD__
# include <sys/param.h>
# endif
# include <sys/mount.h>
# 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 <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)
#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
# 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
#include <sys/stat.h> // even on Windows some functions use stat()
#include <string>
#include <cstring>
#include <cstdio> // for remove, rename
#include <cerrno>
#include <cassert>
// #include <iostream> // for debugging only; comment out when not in use
// 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)
// 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
// 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)!= 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
{
# ifdef BOOST_POSIX_API
const char dot = '.';
# else
const wchar_t dot = L'.';
# endif
fs::file_type query_file_type(const path& p, error_code* ec);
boost::filesystem3::directory_iterator end_dir_itr;
const std::size_t buf_size(128);
const error_code ok;
bool error(bool was_error, error_code* ec, const string& message)
{
if (!was_error)
{
if (ec != 0) ec->clear();
}
else
{ // error
if (ec == 0)
BOOST_FILESYSTEM_THROW(filesystem_error(message,
error_code(BOOST_ERRNO, system_category())));
else
ec->assign(BOOST_ERRNO, system_category());
}
return was_error;
}
bool error(bool was_error, const path& p, error_code* ec, const string& message)
{
if (!was_error)
{
if (ec != 0) ec->clear();
}
else
{ // error
if (ec == 0)
BOOST_FILESYSTEM_THROW(filesystem_error(message,
p, error_code(BOOST_ERRNO, system_category())));
else
ec->assign(BOOST_ERRNO, system_category());
}
return was_error;
}
bool error(bool was_error, const path& p1, const path& p2, error_code* ec,
const string& message)
{
if (!was_error)
{
if (ec != 0) ec->clear();
}
else
{ // error
if (ec == 0)
BOOST_FILESYSTEM_THROW(filesystem_error(message,
p1, p2, error_code(BOOST_ERRNO, system_category())));
else
ec->assign(BOOST_ERRNO, system_category());
}
return was_error;
}
bool error(bool was_error, const error_code& result,
const path& p, error_code* ec, const string& message)
// Overwrites ec if there has already been an error
{
if (!was_error)
{
if (ec != 0) ec->clear();
}
else
{ // error
if (ec == 0)
BOOST_FILESYSTEM_THROW(filesystem_error(message, p, result));
else
*ec = result;
}
return was_error;
}
bool error(bool was_error, const error_code& result,
const path& p1, const path& p2, error_code* ec, const string& message)
// Overwrites ec if there has already been an error
{
if (!was_error)
{
if (ec != 0) ec->clear();
}
else
{ // error
if (ec == 0)
BOOST_FILESYSTEM_THROW(filesystem_error(message, p1, p2, result));
else
*ec = result;
}
return was_error;
}
bool is_empty_directory(const path& p)
{
return fs::directory_iterator(p)== end_dir_itr;
}
bool remove_directory(const path& p) // true if succeeds
{ return BOOST_REMOVE_DIRECTORY(p.c_str()); }
bool remove_file(const path& p) // true if succeeds
{ return BOOST_DELETE_FILE(p.c_str()); }
// 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), p, ec, "boost::filesystem::remove"))
return false;
}
else
{
if (error(!remove_file(p), 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 = 1;
if (type == fs::directory_file) // but not a directory symlink
{
for (fs::directory_iterator itr(p);
itr != end_dir_itr; ++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);
}
}
remove_file_or_directory(p, type, ec);
return count;
}
#ifdef BOOST_POSIX_API
//--------------------------------------------------------------------------------------//
// //
// POSIX-specific helpers //
// //
//--------------------------------------------------------------------------------------//
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)
{ 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
{
if ((sz = ::write(outfile, buf.get() + sz_write,
sz_read - sz_write))< 0)
{
sz_read = sz; // cause read loop termination
break; // and error to be thrown after closes
}
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 //
// //
//--------------------------------------------------------------------------------------//
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
}
// 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;
}
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);
}
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 handle = CreateFileW(p, GENERIC_WRITE, 0, 0, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL, 0);
LARGE_INTEGER sz;
sz.QuadPart = size;
return handle != INVALID_HANDLE_VALUE
&& ::SetFilePointerEx(handle, sz, 0, FILE_BEGIN)
&& ::SetEndOfFile(handle)
&& ::CloseHandle(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(
::GetModuleHandle(TEXT("kernel32.dll")), "CreateHardLinkW"));
typedef BOOLEAN (WINAPI *PtrCreateSymbolicLinkW)(
/*__in*/ LPCWSTR lpSymlinkFileName,
/*__in*/ LPCWSTR lpTargetFileName,
/*__in*/ DWORD dwFlags
);
PtrCreateSymbolicLinkW create_symbolic_link_api = PtrCreateSymbolicLinkW(
::GetProcAddress(
::GetModuleHandle(TEXT("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 filesystem3
{
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
void copy(const path& from, const path& to, system::error_code* ec)
{
file_status s(symlink_status(from, *ec));
if (ec != 0 && *ec) return;
if(is_symlink(s))
{
copy_symlink(from, to, *ec);
}
else if(is_directory(s))
{
copy_directory(from, to, *ec);
}
else if(is_regular_file(s))
{
copy_file(from, to, copy_option::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()),
from, to, ec, "boost::filesystem::copy_directory");
}
BOOST_FILESYSTEM_DECL
void copy_file(const path& from, const path& to,
BOOST_SCOPED_ENUM(copy_option)option,
error_code* ec)
{
error(!BOOST_COPY_FILE(from.c_str(), to.c_str(),
option == copy_option::fail_if_exists),
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(true, error_code(BOOST_ERROR_NOT_SUPPORTED, system_category()),
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() || exists(p))
{
if (!p.empty() && !is_directory(p))
{
if (ec == 0)
BOOST_FILESYSTEM_THROW(filesystem_error(
"boost::filesystem::create_directories", p,
error_code(system::errc::file_exists, system::generic_category())));
else ec->assign(system::errc::file_exists, system::generic_category());
}
return false;
}
// First create branch, by calling ourself recursively
create_directories(p.parent_path(), ec);
// Now that parent's path exists, create the directory
create_directory(p, ec);
return true;
}
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 (errval == BOOST_ERROR_ALREADY_EXISTS && 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(true, error_code(BOOST_ERROR_NOT_SUPPORTED, system_category()), 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,
error_code(BOOST_ERROR_NOT_SUPPORTED, system_category()),
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),
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(true, error_code(BOOST_ERROR_NOT_SUPPORTED, system_category()), 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,
error_code(BOOST_ERROR_NOT_SUPPORTED, system_category()),
to, from, ec,
"boost::filesystem::create_hard_link"))
return;
# endif
error(!BOOST_CREATE_HARD_LINK(from.c_str(), to.c_str()), 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(true, error_code(BOOST_ERROR_NOT_SUPPORTED, system_category()), 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,
error_code(BOOST_ERROR_NOT_SUPPORTED, system_category()),
to, from, ec,
"boost::filesystem::create_symlink"))
return;
# endif
error(!BOOST_CREATE_SYMBOLIC_LINK(from.c_str(), to.c_str(), 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
// 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, 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()),
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, 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),
p1, p2, ec, "boost::filesystem::equivalent"))
return false;
if (error(!::GetFileInformationByHandle(h2.handle, &info2),
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,
p, ec, "boost::filesystem::file_size"))
return static_cast<boost::uintmax_t>(-1);
if (error(!S_ISREG(path_stat.st_mode),
error_code(EPERM, system_category()),
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,
p, ec, "boost::filesystem::file_size"))
return static_cast<boost::uintmax_t>(-1);
if (error((fad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)!= 0,
error_code(ERROR_NOT_SUPPORTED, system_category()),
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,
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,
p, ec, "boost::filesystem::hard_link_count")
&& !error(::GetFileInformationByHandle(h.handle, &info)== 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)
: path_stat.st_size == 0;
# else
WIN32_FILE_ATTRIBUTE_DATA fad;
if (error(::GetFileAttributesExW(p.c_str(), ::GetFileExInfoStandard, &fad)== 0,
p, ec, "boost::filesystem::is_empty"))
return false;
if (ec != 0) ec->clear();
return
(fad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
? is_empty_directory(p)
: (!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,
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,
p, ec, "boost::filesystem::last_write_time"))
return std::time_t(-1);
FILETIME lwt;
if (error(::GetFileTime(hw.handle, 0, 0, &lwt)== 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,
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,
p, ec, "boost::filesystem::last_write_time"))
return;
FILETIME lwt;
to_FILETIME(new_time, lwt);
error(::SetFileTime(hw.handle, 0, 0, &lwt)== 0,
p, ec, "boost::filesystem::last_write_time");
# 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(true, error_code(BOOST_ERROR_NOT_SUPPORTED, system_category()), 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, 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, 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
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, 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 kep 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, 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()), old_p, new_p, ec,
"boost::filesystem::rename");
}
BOOST_FILESYSTEM_DECL
void resize_file(const path& p, uintmax_t size, system::error_code* ec)
{
error(!BOOST_RESIZE_FILE(p.c_str(), size), 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)!= 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);
}
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);
if (S_ISREG(path_stat.st_mode))
return fs::file_status(fs::regular_file);
if (S_ISBLK(path_stat.st_mode))
return fs::file_status(fs::block_file);
if (S_ISCHR(path_stat.st_mode))
return fs::file_status(fs::character_file);
if (S_ISFIFO(path_stat.st_mode))
return fs::file_status(fs::fifo_file);
if (S_ISSOCK(path_stat.st_mode))
return fs::file_status(fs::socket_file);
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
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 (ec != 0) ec->clear();
return (attr & FILE_ATTRIBUTE_DIRECTORY)
? file_status(directory_file)
: file_status(regular_file);
# 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);
}
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);
if (S_ISDIR(path_stat.st_mode))
return fs::file_status(fs::directory_file);
if (S_ISLNK(path_stat.st_mode))
return fs::file_status(fs::symlink_file);
if (S_ISBLK(path_stat.st_mode))
return fs::file_status(fs::block_file);
if (S_ISCHR(path_stat.st_mode))
return fs::file_status(fs::character_file);
if (S_ISFIFO(path_stat.st_mode))
return fs::file_status(fs::fifo_file);
if (S_ISSOCK(path_stat.st_mode))
return fs::file_status(fs::socket_file);
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)
: file_status(reparse_file);
return (attr & FILE_ATTRIBUTE_DIRECTORY)
? file_status(directory_file)
: file_status(regular_file);
# 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, 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,
p, ec, "boost::filesystem::system_complete")
? path()
: path(big_buf.get());
# endif
}
} // 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();
}
} // namespace path_traits
} // namespace filesystem3
} // 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
{
errno = 0;
# if !defined(__CYGWIN__)\
&& defined(_POSIX_THREAD_SAFE_FUNCTIONS)\
&& defined(_SC_THREAD_SAFE_FUNCTIONS)\
&& (_POSIX_THREAD_SAFE_FUNCTIONS+0 >= 0)\
&& (!defined(__hpux) || defined(_REENTRANT)) \
&& (!defined(_AIX) || defined(__THREAD_SAFE))
if (::sysconf(_SC_THREAD_SAFE_FUNCTIONS)>= 0)
{ return ::readdir_r(dirp, entry, result); }
# endif
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;
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_DIRECTORY)
{ sf.type(fs::directory_file); symlink_sf.type(fs::directory_file); }
else { sf.type(fs::regular_file); symlink_sf.type(fs::regular_file); }
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_DIRECTORY)
{ sf.type(fs::directory_file); symlink_sf.type(fs::directory_file); }
else { sf.type(fs::regular_file); symlink_sf.type(fs::regular_file); }
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 filesystem3
{
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, 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(true, result, 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)))
{ it.increment(); }
}
}
void directory_iterator_increment(directory_iterator& it,
system::error_code* ec)
{
BOOST_ASSERT(it.m_imp.get() && "attempt to increment end iterator");
BOOST_ASSERT(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)
{
it.m_imp.reset();
if (ec == 0)
BOOST_FILESYSTEM_THROW(
filesystem_error("boost::filesystem::directory_iterator::operator++",
it.m_imp->dir_entry.path().parent_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){ it.m_imp.reset(); return; } // eof, make end
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 filesystem3
} // namespace boost
#endif // no wide character support