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From: Helmut Karlowski <helmut DOT karlowski AT ish DOT de>
To: cygwin AT cygwin DOT com
Subject: Re: /dev/tty does not work from shell
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In-Reply-To: <54DA411E.3040700@redhat.com>
References: <20150210174647 DOT 7760EAC0 DOT helmut DOT karlowski AT ish DOT de> <54DA411E DOT 3040700 AT redhat DOT com>
Date: Tue, 10 Feb 2015 19:04:51 +0100
Message-Id: <20150210190451.CC914740.helmut.karlowski@ish.de>
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--------------------------------------------------
Eric Blake <eblake AT redhat DOT com> wrote:
(10/02/2015 18:34)

> On 02/10/2015 09:46 AM, Helmut Karlowski wrote:
> >> The same test from the command line:
> >>
> >> $ stat -c %i /dev/tty - 0>/dev/tty
> >> 327680
> >> 8912896
> >>
> >> use any other (already-existing) file to see that the two numbers should
> >> normally be the same.
> > 
> > Don't know why, but cygwin is not the only OS that does that. I'd 
> > suggest to check for terminal or something.
> 
> Umm, what other OS changes the inode from what you called stat() on to

Well, I tested again and found that the inode only changes when I do 
this in bash:

ksh:
675|/home/root}stat -c %i /tmp/tty - 0>/tmp/tty
835940
835940
676|/home/root}bash
root AT IRAC root # stat -c %i /dev/tty - 0>/dev/tty
713246
80052544

Ths OS is MiNT.

On cygwin in both cases the inode changes.

Again: I would not use the inode of a special file at all.

-Helmut

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