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110 lines
3.5 KiB
110 lines
3.5 KiB
4 months ago
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//===-- FileSystem.cpp ----------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Host/windows/windows.h"
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#include <share.h>
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#include <shellapi.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include "lldb/Host/FileSystem.h"
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#include "lldb/Host/windows/AutoHandle.h"
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#include "lldb/Host/windows/PosixApi.h"
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#include "llvm/Support/ConvertUTF.h"
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#include "llvm/Support/FileSystem.h"
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using namespace lldb_private;
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const char *FileSystem::DEV_NULL = "nul";
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const char *FileSystem::PATH_CONVERSION_ERROR =
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"Error converting path between UTF-8 and native encoding";
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Status FileSystem::Symlink(const FileSpec &src, const FileSpec &dst) {
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Status error;
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std::wstring wsrc, wdst;
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if (!llvm::ConvertUTF8toWide(src.GetCString(), wsrc) ||
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!llvm::ConvertUTF8toWide(dst.GetCString(), wdst))
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error.SetErrorString(PATH_CONVERSION_ERROR);
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if (error.Fail())
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return error;
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DWORD attrib = ::GetFileAttributesW(wdst.c_str());
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if (attrib == INVALID_FILE_ATTRIBUTES) {
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error.SetError(::GetLastError(), lldb::eErrorTypeWin32);
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return error;
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}
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bool is_directory = !!(attrib & FILE_ATTRIBUTE_DIRECTORY);
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DWORD flag = is_directory ? SYMBOLIC_LINK_FLAG_DIRECTORY : 0;
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BOOL result = ::CreateSymbolicLinkW(wsrc.c_str(), wdst.c_str(), flag);
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if (!result)
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error.SetError(::GetLastError(), lldb::eErrorTypeWin32);
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return error;
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}
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Status FileSystem::Readlink(const FileSpec &src, FileSpec &dst) {
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Status error;
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std::wstring wsrc;
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if (!llvm::ConvertUTF8toWide(src.GetCString(), wsrc)) {
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error.SetErrorString(PATH_CONVERSION_ERROR);
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return error;
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}
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HANDLE h = ::CreateFileW(wsrc.c_str(), GENERIC_READ,
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FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
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OPEN_EXISTING, FILE_FLAG_OPEN_REPARSE_POINT, NULL);
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if (h == INVALID_HANDLE_VALUE) {
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error.SetError(::GetLastError(), lldb::eErrorTypeWin32);
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return error;
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}
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std::vector<wchar_t> buf(PATH_MAX + 1);
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// Subtract 1 from the path length since this function does not add a null
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// terminator.
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DWORD result = ::GetFinalPathNameByHandleW(
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h, buf.data(), buf.size() - 1, FILE_NAME_NORMALIZED | VOLUME_NAME_DOS);
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std::string path;
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if (result == 0)
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error.SetError(::GetLastError(), lldb::eErrorTypeWin32);
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else if (!llvm::convertWideToUTF8(buf.data(), path))
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error.SetErrorString(PATH_CONVERSION_ERROR);
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else
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dst.SetFile(path, FileSpec::Style::native);
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::CloseHandle(h);
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return error;
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}
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Status FileSystem::ResolveSymbolicLink(const FileSpec &src, FileSpec &dst) {
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return Status("ResolveSymbolicLink() isn't implemented on Windows");
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}
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FILE *FileSystem::Fopen(const char *path, const char *mode) {
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Collect(path);
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std::wstring wpath, wmode;
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if (!llvm::ConvertUTF8toWide(path, wpath))
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return nullptr;
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if (!llvm::ConvertUTF8toWide(mode, wmode))
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return nullptr;
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FILE *file;
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if (_wfopen_s(&file, wpath.c_str(), wmode.c_str()) != 0)
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return nullptr;
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return file;
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}
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int FileSystem::Open(const char *path, int flags, int mode) {
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Collect(path);
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std::wstring wpath;
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if (!llvm::ConvertUTF8toWide(path, wpath))
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return -1;
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int result;
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::_wsopen_s(&result, wpath.c_str(), flags, _SH_DENYNO, mode);
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return result;
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}
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