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Use FileEndOfFileInfo, not FileAllocationInfo

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This fixes WINE support
This commit is contained in:
Chris Denton 2023-12-17 17:54:20 +00:00
parent 3a2aa5854c
commit e585b0ed58
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GPG key ID: 713472F2F45627DE
1 changed files with 8 additions and 6 deletions
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14
library/std/src/sys/windows/fs.rs
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@ -309,14 +309,16 @@ impl File {
&& unsafe { c::GetLastError() } == c::ERROR_ALREADY_EXISTS
{
unsafe {
// Setting the allocation size to zero also sets the
// EOF position to zero.
let alloc = c::FILE_ALLOCATION_INFO { AllocationSize: 0 };
// This originally used `FileAllocationInfo` instead of
// `FileEndOfFileInfo` but that wasn't supported by WINE.
// It's arguable which fits the semantics of `OpenOptions`
// better so let's just use the more widely supported method.
let eof = c::FILE_END_OF_FILE_INFO { EndOfFile: 0 };
let result = c::SetFileInformationByHandle(
handle.as_raw_handle(),
c::FileAllocationInfo,
ptr::addr_of!(alloc).cast::<c_void>(),
mem::size_of::<c::FILE_ALLOCATION_INFO>() as u32,
c::FileEndOfFileInfo,
ptr::addr_of!(eof).cast::<c_void>(),
mem::size_of::<c::FILE_END_OF_FILE_INFO>() as u32,
);
if result == 0 {
return Err(io::Error::last_os_error());