linux-kernel - Re: [PATCH v3] cpupower: Make help command available for custom install dir

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Date: Fri, 28 Jun 2024 13:45:52 -0600
From: Shuah Khan <skhan@...uxfoundation.org>
To: Roman Storozhenko <romeusmeister@...il.com>
Cc: Thomas Renninger <trenn@...e.com>, Shuah Khan <shuah@...nel.org>,
 Javier Carrasco <javier.carrasco.cruz@...il.com>, linux-pm@...r.kernel.org,
 linux-kernel@...r.kernel.org, Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH v3] cpupower: Make help command available for custom
 install dir

On 6/28/24 05:30, Roman Storozhenko wrote:
> On Thu, Jun 27, 2024 at 7:33 PM Shuah Khan <skhan@...uxfoundation.org> wrote:
>>
>> On 6/27/24 01:49, Roman Storozhenko wrote:
>>> When the 'cpupower' utility installed in the custom dir, it fails to
>>> render appropriate help info for a particular subcommand:
>>> $ LD_LIBRARY_PATH=lib64/ bin/cpupower help monitor
>>> with error message like 'No manual entry for cpupower-monitor.1'
>>> The issue is that under the hood it calls 'exec' function with
>>> the following args: 'man cpupower-monitor.1'. In turn, 'man' search
>>> path is defined in '/etc/manpath.config'. Of course it contains only
>>> standard system man paths.
>>> Make subcommands help available for a user by setting up 'MANPATH'
>>> environment variable to the custom installation man pages dir. That
>>> variable value will be prepended to the man pages standard search paths
>>> as described in 'SEARCH PATH' section of MANPATH(5).
>>
>> What I am asking you is what happens when you set the MANPATH before
>> running the command?
> 
> It adds the custom search path to the beginning of the MANPATH variable.
> I tested this case. All works as expected.
> 

Let's try again. What happens if you run the command with MANPATH set and
exported and then run the command. Can you send the output?

thanks,
-- Shuah