Lightemerald/windows-user-space-emulator
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Support fseek/ftell

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momo5502
2024-10-23 06:27:43 +02:00
parent a8df5f6fc8
commit 2938b1bf12
2 changed files with 118 additions and 7 deletions
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21
src/common/utils/file_handle.hpp
View File

@@ -59,6 +59,27 @@ namespace utils
return this->file_;
}
[[nodiscard]] int64_t size() const
{
const auto current_position = this->tell();
this->seek_to(0, SEEK_END);
const auto size = this->tell();
this->seek_to(current_position);
return size;
}
bool seek_to(const int64_t position, const int origin = SEEK_SET) const
{
return _fseeki64(this->file_, position, origin) == 0;
}
[[nodiscard]] int64_t tell() const
{
return _ftelli64(this->file_);
}
private:
FILE* file_{};

104
src/windows-emulator/syscalls.cpp
View File

@@ -976,17 +976,72 @@ namespace
return STATUS_NOT_SUPPORTED;
}
NTSTATUS handle_NtQueryInformationFile(const syscall_context& c, uint64_t /*file_handle*/,
const emulator_object<ULONG_PTR> io_status_block,
NTSTATUS handle_NtSetInformationFile(const syscall_context& c, const uint64_t file_handle,
const emulator_object<IO_STATUS_BLOCK> io_status_block,
const uint64_t file_information,
const ULONG length, const FILE_INFORMATION_CLASS info_class)
{
const auto* f = c.proc.files.get(file_handle);
if (!f)
{
return STATUS_INVALID_HANDLE;
}
if (info_class == FilePositionInformation)
{
if (!f->handle)
{
return STATUS_NOT_SUPPORTED;
}
if (io_status_block)
{
IO_STATUS_BLOCK block{};
block.Information = sizeof(FILE_POSITION_INFORMATION);
io_status_block.write(block);
}
if (length != sizeof(FILE_POSITION_INFORMATION))
{
return STATUS_BUFFER_OVERFLOW;
}
const emulator_object<FILE_POSITION_INFORMATION> info{c.emu, file_information};
const auto i = info.read();
if (!f->handle.seek_to(i.CurrentByteOffset.QuadPart))
{
return STATUS_INVALID_PARAMETER;
}
return STATUS_SUCCESS;
}
printf("Unsupported set file info class: %X\n", info_class);
c.emu.stop();
return STATUS_NOT_SUPPORTED;
}
NTSTATUS handle_NtQueryInformationFile(const syscall_context& c, uint64_t file_handle,
const emulator_object<IO_STATUS_BLOCK> io_status_block,
const uint64_t file_information,
const uint32_t length,
const uint32_t info_class)
{
const auto* f = c.proc.files.get(file_handle);
if (!f)
{
return STATUS_INVALID_HANDLE;
}
if (info_class == FileStandardInformation)
{
if (io_status_block)
{
io_status_block.write(sizeof(FILE_STANDARD_INFORMATION));
IO_STATUS_BLOCK block{};
block.Information = sizeof(FILE_STANDARD_INFORMATION);
io_status_block.write(block);
}
if (length != sizeof(FILE_STANDARD_INFORMATION))
@@ -995,15 +1050,49 @@ namespace
}
const emulator_object<FILE_STANDARD_INFORMATION> info{c.emu, file_information};
info.access([&](FILE_STANDARD_INFORMATION& i)
FILE_STANDARD_INFORMATION i{};
i.Directory = f->handle ? FALSE : TRUE;
if (f->handle)
{
memset(&i, 0, sizeof(i));
});
i.EndOfFile.QuadPart = f->handle.size();
}
info.write(i);
return STATUS_SUCCESS;
}
printf("Unsupported file info class: %X\n", info_class);
if (info_class == FilePositionInformation)
{
if (!f->handle)
{
return STATUS_NOT_SUPPORTED;
}
if (io_status_block)
{
IO_STATUS_BLOCK block{};
block.Information = sizeof(FILE_POSITION_INFORMATION);
io_status_block.write(block);
}
if (length != sizeof(FILE_POSITION_INFORMATION))
{
return STATUS_BUFFER_OVERFLOW;
}
const emulator_object<FILE_POSITION_INFORMATION> info{c.emu, file_information};
FILE_POSITION_INFORMATION i{};
i.CurrentByteOffset.QuadPart = f->handle.tell();
info.write(i);
return STATUS_SUCCESS;
}
printf("Unsupported query file info class: %X\n", info_class);
c.emu.stop();
return STATUS_NOT_SUPPORTED;
@@ -2113,6 +2202,7 @@ void syscall_dispatcher::add_handlers(std::unordered_map<std::string, syscall_ha
add_handler(NtWaitForAlertByThreadId);
add_handler(NtAlertThreadByThreadIdEx);
add_handler(NtReadFile);
add_handler(NtSetInformationFile);
#undef add_handler
}