Re: [HEADSUP] naming of tty devices.

From: Valentin Nechayev (netch_at_lucky.net)
Date: 09/20/04

  • Next message: Poul-Henning Kamp: "Re: [HEADSUP] naming of tty devices." 
    Date: Mon, 20 Sep 2004 14:27:33 +0300
To: Poul-Henning Kamp <phk@phk.freebsd.dk>

     Mon, Sep 20, 2004 at 09:38:45, phk wrote about "[HEADSUP] naming of tty devices.":

    > My suggestion is the following:

    > All drivers will offer "tty${something}" devices, and
    > generally ${something} will consist of a letter followed
    > by a number, possibly in base 36 ([0-9a-z]).

    There are cases when cua devices are used as login devices, and too many
    places where 3 first chars of device name are removed without checking them,
    e.g. /bin/ps:

    === cut ===
           else {
                    if (strncmp(ttname, "tty", 3) == 0 ||
                        strncmp(ttname, "cua", 3) == 0)
                            ttname += 3;
    === end cut ===

    When restoring terminal device from this name, now it is possible yet
    to determine terminal testing /dev/tty$x or /dev/cua$x; with your new
    scheme this will be impossible totally.

    If we suppose to remain ability of logging in via callout devices,
    these code pieces must be rewritten to keep "tty"/"cua", or all callout
    devices must be renamed to terminals.

    On 4.* I use the latter variant on one host: /dev/cuaa$n are renamed
    to /dev/ttyOd$n, n=0...3.

    > This results in the following major compatibility issues:
    > sio's cuaa* gets renamed to cuad*

    Basing on written above I propose /dev/ttyOd*

    -netch-
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