Vern Hoxie wrote:
>
> On Wed, 26 Apr 2000, Steve Cohen wrote:
>
> > What is the difference between ttyS0 (capital S) and ttys0 (small
> > s)? Both of these devices are present in the /dev directory in my
> > Red Hat distribution. I know that ttyS0 is COM1 but what the heck
> > is ttys0?
>
> My first response to this was in error. Acording to
> /usr/src/linux/Documentation/devices.txt, the psuedo tty's are
> designated:
>
> Pseudo-TTY masters
> Type char
> Major 2
> Minor 0 = /dev/ptyp0 First PTY master
> 1 = /dev/ptyp1 Second PTY master
> ...
> 255 = /dev/ptyef 256th PTY master
>
> Pseudo-TTY slaves
> Type char
> Major 3
> Minor 0 = /dev/ttyp0 First PTY slave
> 1 = /dev/ttyp1 Second PTY slave
> ...
> 256 = /dev/ttyef 256th PTY slave
>
> Pseudo-tty's are named as follows:
> * Masters are "pty", slaves are "tty";
> * the fourth letter is one of pqrstuvwxyzabcde indicating
> the 1st through 16th series of 16 pseudo-ttys each, and
> * the fifth letter is one of 0123456789abcdef indicating
> the position within the series.
>
> Sorry to have misled you.
>
> vern
>
> --
> Vernon C. Hoxie [EMAIL PROTECTED]
> 3975 W. 29th Ave. uucp: 303-455-2670
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> Nothing but the heart can change the heart.
>
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OK. Sounds like I've got 256 pseudo-ttys on my system. Why would I
need that many? I only ran into these, by the way, once, when I was
doing something with the serial port and mistyped.
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