Stefan Monnier wrote:
>> check ISDIR first
>>     
>
> It's a good heursitic, but it's still just a heuristic.
> You may have a /dev/tty directory and still use /dev/tty1.
> Maybe it's better to get rid of the "/dev/" prefix to make it more clear
> that it's not really a valid file name.
>
>
>         Stefan
>
>
>   
you mean /dev/tty1 and /dev/tty/1 will exist at the same time?
It won't as I know in linux

procfs_ttyname should return a full path of the ttyname, or at least one function can return the fullpath.