111 lines · cpp
1//===-- FileSystem.cpp ----------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "lldb/Host/windows/windows.h"10 11#include <share.h>12#include <shellapi.h>13#include <sys/stat.h>14#include <sys/types.h>15 16#include "lldb/Host/FileSystem.h"17#include "lldb/Host/windows/AutoHandle.h"18#include "lldb/Host/windows/PosixApi.h"19 20#include "llvm/Support/ConvertUTF.h"21#include "llvm/Support/FileSystem.h"22 23using namespace lldb_private;24 25const char *FileSystem::DEV_NULL = "nul";26 27const char *FileSystem::PATH_CONVERSION_ERROR =28 "Error converting path between UTF-8 and native encoding";29 30Status FileSystem::Symlink(const FileSpec &src, const FileSpec &dst) {31 Status error;32 std::wstring wsrc, wdst;33 if (!llvm::ConvertUTF8toWide(src.GetPath(), wsrc) ||34 !llvm::ConvertUTF8toWide(dst.GetPath(), wdst))35 error = Status::FromErrorString(PATH_CONVERSION_ERROR);36 if (error.Fail())37 return error;38 DWORD attrib = ::GetFileAttributesW(wdst.c_str());39 if (attrib == INVALID_FILE_ATTRIBUTES) {40 error = Status(::GetLastError(), lldb::eErrorTypeWin32);41 return error;42 }43 bool is_directory = !!(attrib & FILE_ATTRIBUTE_DIRECTORY);44 DWORD flag = is_directory ? SYMBOLIC_LINK_FLAG_DIRECTORY : 0;45 BOOL result = ::CreateSymbolicLinkW(wsrc.c_str(), wdst.c_str(), flag);46 if (!result)47 error = Status(::GetLastError(), lldb::eErrorTypeWin32);48 return error;49}50 51Status FileSystem::Readlink(const FileSpec &src, FileSpec &dst) {52 Status error;53 std::wstring wsrc;54 if (!llvm::ConvertUTF8toWide(src.GetPath(), wsrc)) {55 error = Status::FromErrorString(PATH_CONVERSION_ERROR);56 return error;57 }58 59 HANDLE h = ::CreateFileW(wsrc.c_str(), GENERIC_READ,60 FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,61 OPEN_EXISTING, FILE_FLAG_OPEN_REPARSE_POINT, NULL);62 if (h == INVALID_HANDLE_VALUE) {63 error = Status(::GetLastError(), lldb::eErrorTypeWin32);64 return error;65 }66 67 std::vector<wchar_t> buf(PATH_MAX + 1);68 // Subtract 1 from the path length since this function does not add a null69 // terminator.70 DWORD result = ::GetFinalPathNameByHandleW(71 h, buf.data(), buf.size() - 1, FILE_NAME_NORMALIZED | VOLUME_NAME_DOS);72 std::string path;73 if (result == 0)74 error = Status(::GetLastError(), lldb::eErrorTypeWin32);75 else if (!llvm::convertWideToUTF8(buf.data(), path))76 error = Status::FromErrorString(PATH_CONVERSION_ERROR);77 else78 dst.SetFile(path, FileSpec::Style::native);79 80 ::CloseHandle(h);81 return error;82}83 84Status FileSystem::ResolveSymbolicLink(const FileSpec &src, FileSpec &dst) {85 return Status::FromErrorString(86 "ResolveSymbolicLink() isn't implemented on Windows");87}88 89FILE *FileSystem::Fopen(const char *path, const char *mode) {90 std::wstring wpath, wmode;91 if (!llvm::ConvertUTF8toWide(path, wpath))92 return nullptr;93 if (!llvm::ConvertUTF8toWide(mode, wmode))94 return nullptr;95 FILE *file;96 if (_wfopen_s(&file, wpath.c_str(), wmode.c_str()) != 0)97 return nullptr;98 return file;99}100 101int FileSystem::Open(const char *path, int flags, int mode) {102 std::wstring wpath;103 if (!llvm::ConvertUTF8toWide(path, wpath))104 return -1;105 // All other bits are rejected by _wsopen_s106 mode = mode & (_S_IREAD | _S_IWRITE);107 int result;108 ::_wsopen_s(&result, wpath.c_str(), flags, _SH_DENYNO, mode);109 return result;110}111