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[bug-diffutils] bug#19509: bug#19509: bug#19509: bug#19509: [PATCH] diff

From: Jim Meyering
Subject: [bug-diffutils] bug#19509: bug#19509: bug#19509: bug#19509: [PATCH] diff: treat fifos as identical
Date: Fri, 5 May 2017 09:40:12 -0700

close 19509
tags 19509 notabug

On Wed, Feb 11, 2015 at 8:22 PM, Ondřej Svoboda <address@hidden> wrote:
> Thank you, Eric!
> I will try it out.
> On 12.2.2015 01:25, Eric Blake wrote:
>> On 02/11/2015 04:37 PM, Ondřej Svoboda wrote:
>>> I also posed this question to myself -- how can we tell two fifos apart?
>>> Do they by any chance store e.g. a file descriptor when they are being
>>> used?
>>> I am not aware of any comparison done to fifos but I may as well be
>>> wrong.
>> fstat() will tell you if two fds are the same fifo - their st_dev and
>> st_ino will be equal.

As far as I can see, diff already does the right thing: If the two
fifos are the same dev/ino, it doesn't even read them and exits 0.
Otherwise, it reads each and compares, just as for other types of files.

I'm marking this auto-created issue as "done", and "notabug", but feel
free to comment here.

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