dirSymLink

fn dirSymLink(
    userdata: ?*anyopaque,
    dir: Dir,
    target_path: []const u8,
    sym_link_path: []const u8,
    flags: Dir.SymLinkFlags,
) Dir.SymLinkError!void {
    const ev: *Evented = @ptrCast(@alignCast(userdata));
    _ = ev;
    _ = flags;

    var target_path_buffer: [c.PATH_MAX]u8 = undefined;
    var sym_link_path_buffer: [c.PATH_MAX]u8 = undefined;

    const target_path_posix = try pathToPosix(target_path, &target_path_buffer);
    const sym_link_path_posix = try pathToPosix(sym_link_path, &sym_link_path_buffer);

    while (true) switch (c.errno(c.symlinkat(target_path_posix, dir.handle, sym_link_path_posix))) {
        .SUCCESS => return,
        .INTR => {},
        .FAULT => |err| return errnoBug(err),
        .INVAL => |err| return errnoBug(err),
        .ACCES => return error.AccessDenied,
        .PERM => return error.PermissionDenied,
        .DQUOT => return error.DiskQuota,
        .EXIST => return error.PathAlreadyExists,
        .IO => return error.FileSystem,
        .LOOP => return error.SymLinkLoop,
        .NAMETOOLONG => return error.NameTooLong,
        .NOENT => return error.FileNotFound,
        .NOTDIR => return error.NotDir,
        .NOMEM => return error.SystemResources,
        .NOSPC => return error.NoSpaceLeft,
        .ROFS => return error.ReadOnlyFileSystem,
        .ILSEQ => return error.BadPathName,
        else => |err| return unexpectedErrno(err),
    };
}