Re: [gentoo-user] executing a command as a nologin user

[Fernando Rodriguez <cyklonite@gmail.com>]

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On 07/13/2016 07:10 AM, Alan McKinnon wrote:
> On 12/07/2016 03:47, jens w wrote:
>> .procmailrc
>> :0 c
>> * !^X-Loop: name@example.com
>> | formail -X "From:" | $HOME/bin/script.sh
>>
>> procmail.log
>> procmail: Executing " formail -X "From:" | $HOME/bin/script.sh
>>
>> for incoming mail, a script is executed. logfile has the same entry as
>> it is in other users. but the script do nothing.
>>
>> How executing a command as a nologin user?
>>
> 
> 
> You can't, not the way you are doing it.
> You want to launch a shell script for the user, but the user's shell is /sbin/nologin. This exits immediately without launching the script.
> 
> Give the user a real shell.
> 
> Alan
> 

I've been following this thread and thinking the same thing but wasn't sure.

What if you invoke the shell directly instead of the script, either:
/bin/sh -c "<path to script>" or /bin/sh -c "$(cat <script>)"?

If procmail uses the system() call to launch the script it won't work but if it
uses fork()/exec() or similar I think that it should work.


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