[racket] Detecting named pipes Re: users Digest, Vol 85, Issue 3

Am Sonntag, 2. September 2012, 12:00:02 schrieb users-request at racket-lang.org:
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>    1. Re: Static blog generator (Paulo J. Matos)
>    2. Detecting named pipe (Paulo J. Matos)
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> Message: 2
> Date: Sun, 02 Sep 2012 14:25:37 +0100
> From: "Paulo J. Matos" <paulo at matos-sorge.com>
> To: users at racket-lang.org
> Subject: [racket] Detecting named pipe
> Message-ID: <50435E51.1000208 at matos-sorge.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed

> Hi,

> I am trying to obtain the md5sum of a bunch of files, so for all files 
> with path 'p' I do : (call-with-input-file p md5)

> The problem is that this hangs when I find a named pipe file. 
> file-exists? returns #t and then the process hangs. It seems I can't run 
> md5 on named pipes, so how can I check if a file is a named pipe?

> Cheers,
> -- 
> PMatos



> End of users Digest, Vol 85, Issue 3
> ************************************
Hi,

named pipes have a file-size of zero. So you may detect named pipes by checking 
the file size of each file.

Greetings from Hamburg, Germany
Axel Schnell
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