GNU bug report logs - #6379
process substitution with a give suffix

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From: Peng Yu <pengyu.ut <at> gmail.com>
To: Greg Wooledge <wooledg <at> eeg.ccf.org>
Cc: 6379 <at> debbugs.gnu.org
Subject: bug#6379: process substitution with a give suffix
Date: Tue, 8 Jun 2010 13:33:51 -0500

On Tue, Jun 8, 2010 at 1:02 PM, Greg Wooledge <wooledg <at> eeg.ccf.org> wrote:
> On Tue, Jun 08, 2010 at 12:53:47PM -0500, Peng Yu wrote:
>> I have a program that only accept argument with a give suffix
>>
>> ./program xxx.suffix
>>
>> If I use process substitution, which gives me /dev/fd/xx, it will not
>> work with the program. Is there a way to make sure a suffix is added
>> to the substitute process file handle in /def/fd/, so that the program
>> can work with process substitution?
>
>  mkfifo myfifo.suffix
>  something >myfifo.suffix &
>  ./program <myfifo.suffix
>  wait
>  rm myfifo.suffix

The above question was sent to bug-bash. But since it is related to
mkfilo. I redirect it to bug-coreutils.

I have more than one arguments. I tried the following code. It doesn't
seem to work for more than one arguments. Would you please let me know
what is wrong?

BTW, using fifo is going to be much faster than using a temp file as
it avoid the disk usage, right?

$ cat a.txt
In a.txt
$ cat b.txt
In b.txt
$ cat main.sh
#!/usr/bin/env bash

mkfifo a.suffix
cat a.txt >a.suffix &
mkfifo b.suffix
cat b.txt >b.suffix &
cat <a.suffix <b.suffix
wait
rm a.suffix b.suffix
$ ./main.sh
In b.txt

-- 
Regards,
Peng

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