pathToPosix

pub fn pathToPosix(file_path: []const u8, buffer: *[posix.PATH_MAX]u8) Dir.PathNameError![:0]u8 {
    if (std.mem.containsAtLeastScalar(u8, file_path, 0, 1)) return error.BadPathName;
    // >= rather than > to make room for the null byte
    if (file_path.len >= buffer.len) return error.NameTooLong;
    @memcpy(buffer[0..file_path.len], file_path);
    buffer[file_path.len] = 0;
    return buffer[0..file_path.len :0];
}