GNU bug report logs - #75613
tail-c test fails on CentOS 6

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Bruno Haible <bruno <at> clisp.org>
To: bug-coreutils <at> gnu.org
Subject: tail-c test fails on CentOS 6
Date: Thu, 16 Jan 2025 20:50:29 +0100

[Message part 1 (text/plain, inline)]

On CentOS 6, there is a test failure:

FAIL: tests/tail/tail-c.sh

Log is attached. The command that fails is:

  timeout --verbose 1 tail -c 4096 /dev/urandom

And indeed, I can reproduce it manually:

  $ timeout --verbose 1 src/tail -c 4096 /dev/urandom
  timeout: Unrecognized option '--verbose'
  Try `timeout --help' for more information.

  $ src/timeout --verbose 1 src/tail -c 4096 /dev/urandom
  timeout: sending signal TERM to command 'src/tail'
  $ echo $?
  124

[test-suite.log (text/x-log, attachment)]

Message #8 received at 75613 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Bruno Haible <bruno <at> clisp.org>
Cc: 75613 <at> debbugs.gnu.org
Subject: Re: bug#75613: tail-c test fails on CentOS 6
Date: Thu, 16 Jan 2025 12:19:31 -0800

On 2025-01-16 11:50, Bruno Haible via GNU coreutils Bug Reports wrote:
>    $ src/timeout --verbose 1 src/tail -c 4096 /dev/urandom
>    timeout: sending signal TERM to command 'src/tail'
>    $ echo $?
>    124

Wikipedia[1] says that CentOS versions through CentOS 8 have reached 
end-of-life and are no longer supported, so I doubt whether it's worth 
our time to debug this merely for them. The oldest CentOSish version 
still supported is CentOS Stream 9[2].

[1]: https://en.wikipedia.org/wiki/CentOS#End-of-support_schedule
[2]: https://en.wikipedia.org/wiki/CentOS_Stream#Release_history

Message #11 received at 75613 <at> debbugs.gnu.org (full text, mbox):

From: Pádraig Brady <P <at> draigBrady.com>
To: Paul Eggert <eggert <at> cs.ucla.edu>, Bruno Haible <bruno <at> clisp.org>
Cc: 75613 <at> debbugs.gnu.org
Subject: Re: bug#75613: tail-c test fails on CentOS 6
Date: Thu, 16 Jan 2025 21:11:20 +0000

[Message part 1 (text/plain, inline)]

On 16/01/2025 20:19, Paul Eggert wrote:
> On 2025-01-16 11:50, Bruno Haible via GNU coreutils Bug Reports wrote:
>>     $ src/timeout --verbose 1 src/tail -c 4096 /dev/urandom
>>     timeout: sending signal TERM to command 'src/tail'
>>     $ echo $?
>>     124
> 
> Wikipedia[1] says that CentOS versions through CentOS 8 have reached
> end-of-life and are no longer supported, so I doubt whether it's worth
> our time to debug this merely for them. The oldest CentOSish version
> still supported is CentOS Stream 9[2].
> 
> [1]: https://en.wikipedia.org/wiki/CentOS#End-of-support_schedule
> [2]: https://en.wikipedia.org/wiki/CentOS_Stream#Release_history

Right. Behavior of `tail -c /dev/pseudo` is quite system dependent really,
so that test is quite brittle as is. We already allow for Solaris
specific behavior in the test, so I propose we at least adjust the test
to skip failures on older kernels, as in the attached.

cheers,
Pádraig

[tests-tail-centos6.patch (text/x-patch, attachment)]

Message #14 received at 75613 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Pádraig Brady <P <at> draigBrady.com>,
 Bruno Haible <bruno <at> clisp.org>
Cc: 75613 <at> debbugs.gnu.org
Subject: Re: bug#75613: tail-c test fails on CentOS 6
Date: Thu, 16 Jan 2025 13:16:52 -0800

On 2025-01-16 13:11, Pádraig Brady wrote:
> I propose we at least adjust the test
> to skip failures on older kernels, as in the attached.

Thanks, that looks good to me too.

Message #19 received at 75613-done <at> debbugs.gnu.org (full text, mbox):

From: Pádraig Brady <P <at> draigBrady.com>
To: Paul Eggert <eggert <at> cs.ucla.edu>, Bruno Haible <bruno <at> clisp.org>
Cc: 75613-done <at> debbugs.gnu.org
Subject: Re: bug#75613: tail-c test fails on CentOS 6
Date: Thu, 16 Jan 2025 22:19:14 +0000

On 16/01/2025 21:16, Paul Eggert wrote:
> On 2025-01-16 13:11, Pádraig Brady wrote:
>> I propose we at least adjust the test
>> to skip failures on older kernels, as in the attached.
> 
> Thanks, that looks good to me too.

Pushed.

Marking this as done.

cheers,
Pádraig

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