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dirOpenFileWtf16: Disallow opening directories when requesting write permissions

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This matches the behavior of POSIX
This commit is contained in:
Ryan Liptak
2025-12-20 20:20:14 -08:00
committed by Andrew Kelley
parent e442a0ecc2
commit bb788cd392
1 changed files with 4 additions and 3 deletions
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lib/std/Io/Threaded.zig
+4 -3
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@@ -2917,8 +2917,9 @@ pub fn dirOpenFileWtf16(
sub_path_w: [:0]const u16,
flags: File.OpenFlags,
) File.OpenError!File {
if (std.mem.eql(u16, sub_path_w, &.{'.'})) return error.IsDir;
if (std.mem.eql(u16, sub_path_w, &.{ '.', '.' })) return error.IsDir;
const allow_directory = flags.allow_directory and !flags.isWrite();
if (!allow_directory and std.mem.eql(u16, sub_path_w, &.{'.'})) return error.IsDir;
if (!allow_directory and std.mem.eql(u16, sub_path_w, &.{ '.', '.' })) return error.IsDir;
const path_len_bytes = std.math.cast(u16, sub_path_w.len * 2) orelse return error.NameTooLong;
const current_thread = Thread.getCurrent(t);
const w = windows;
@@ -2963,7 +2964,7 @@ pub fn dirOpenFileWtf16(
.OPEN,
.{
.IO = if (flags.follow_symlinks) .SYNCHRONOUS_NONALERT else .ASYNCHRONOUS,
.NON_DIRECTORY_FILE = !flags.allow_directory,
.NON_DIRECTORY_FILE = !allow_directory,
.OPEN_REPARSE_POINT = !flags.follow_symlinks,
},
null,