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Date: Wed, 21 Mar 2001 14:31:29 +0100 (CET)
From: Kai Germaschewski <kai@thphy.uni-duesseldorf.de>
To: Joern Heissler <joern@heissler.de>
cc: linux-kernel@vger.kernel.org
Subject: Re: strange problem with /dev/isdninfo
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On Wed, 21 Mar 2001, Joern Heissler wrote:

> I've got a strange problem with /dev/isdninfo:
> 
> joern:~# cat /dev/isdninfo
> idmap:  Hisax...
> chmap: 0 1 ...
>
> --> cat /dev/isdninfo works :-)
> 
> Here's the problem:
> 
> open("/dev/isdninfo", O_RDONLY) = 3
> read(3, "", 200) = 0
>
> Could someone please tell me what's wrong? I (and some other people) do not understand this.

Well, /dev/isdninfo will only return the info to you if it entirely fits
into the supplied buffer. So, you should try a read with 2048 bytes or so,
and it'll work just fine.

Not that I think that the current behavior is particularly smart, but
that's how things are.

--Kai


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