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windows.GetFinalPathNameByHandle: Support UNC paths

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Ryan Liptak
2023-08-11 14:36:24 -07:00
parent 19b219bc8a
commit 3819e69376
1 changed files with 10 additions and 0 deletions
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10
lib/std/os/windows.zig
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@@ -1226,8 +1226,18 @@ pub fn GetFinalPathNameByHandle(
const file_path_begin_index = mem.indexOfPos(u16, final_path, expected_prefix.len, &[_]u16{'\\'}) orelse unreachable;
const volume_name_u16 = final_path[0..file_path_begin_index];
const device_name_u16 = volume_name_u16[expected_prefix.len..];
const file_name_u16 = final_path[file_path_begin_index..];
// MUP is Multiple UNC Provider, and indicates that the path is a UNC
// path. In this case, the canonical UNC path can be gotten by just
// dropping the \Device\Mup\ and making sure the path begins with \\
if (mem.eql(u16, device_name_u16, std.unicode.utf8ToUtf16LeStringLiteral("Mup"))) {
out_buffer[0] = '\\';
mem.copyForwards(u16, out_buffer[1..][0..file_name_u16.len], file_name_u16);
return out_buffer[0 .. 1 + file_name_u16.len];
}
// Get DOS volume name. DOS volume names are actually symbolic link objects to the
// actual NT volume. For example:
// (NT) \Device\HarddiskVolume4 => (DOS) \DosDevices\C: == (DOS) C: