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Thread: pseudo terminals: /dev/ptmx and similar

  1. #1

    Default pseudo terminals: /dev/ptmx and similar

    /dev/ptmx <-> /dev/pts/ vs. /dev/ptyp <-> /dev/ttyp

    Here it goes:

    I remember that quite some time ago I could pair 2 programs like "screen" or "minicom" using /dev/ptyp master and a corresponding /dev/ttyp slave device. These devices are gone for some time now.

    Nowadays I think I have to start one of these accessing /dev/ptmx and a slave device is automatically created as /dev/pts/<something>. This auto-create seems to work.

    The problem I have is that although I have rw permissions on the devices, no data is going through and I get an error.


    - screen /dev/ptmx
    - /dev/pts/X is created with proper perms
    - screen /dev/pts/X

    --> "I/O error, no pty found" or similar.

    Help ;-)

  2. #2

    Default Re: pseudo terminals: /dev/ptmx and similar

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