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bug#33946: tail -f stops abruptly in AIX when piped.

From: Bernhard Voelker
Subject: bug#33946: tail -f stops abruptly in AIX when piped.
Date: Thu, 3 Jan 2019 19:22:00 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.3

On 1/3/19 6:39 PM, Ayappan P2 wrote:
>> On 01-Jan-2019, at 10:36 PM, Ayappan P2 <address@hidden> wrote:
>> Hi,
>> I am running coreutils 8.30 in AIX machine and it seems like "tail -f" is
>> not working as it used to be when the output is piped.
>> # ./tail -f test_file | grep 123
>> (1) root @ aixoss-automation-3: /
>> It stops immediately  and it seems like this commit
>> https://github.com/coreutils/coreutils/commit/ce0415fda108b7ec35181118fd7a2c9ee70331ee
>> has introduce this behavior.
>> I checked in Linux with coreutils 8.30 where it works as like earlier
>> versions.
>> Thanks
>> Ayappan P

> Anyone has any idea on this issue ?
> Thanks
> Ayappan P

Thanks for reporting.
It's hard (at least for me) to get hold on to an AIX system,
so would you post a trace file (from 'truss'), please?

Second, is this specific to a certain AIX version?

BTW: our tests should have caught this before the release.
Do you also get an error during 'make check'?

Have a nice day,

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