Re: so-called pipe files (sh-np-*) do not get deleted when processes close.

[Michael Felt (aixtools)]



Sent from my iPhone

> On 11 Mar 2021, at 18:15, Chet Ramey <chet.ramey@case.edu> wrote:
> 
> On 3/11/21 11:28 AM, Michael Felt wrote:
>> Hi,
>> Issue: AdoptOpenJDK build process makes bash calls in a particular way. An 
>> abbreviated (shorter pathnames) example is:
>> ```
>> bash-5.0$ /usr/bin/printf "Building targets 'product-images legacy-jre-image 
>> test-image' in configuration 'aix-ppc64-normal-server-release'\n" > 
>> >(/usr/bin/tee -a /home/aixtools/build.log) 2> >(/usr/bin/tee -a 
>> /home/aixtools/build.log >&2)
>> Building targets 'product-images legacy-jre-image test-image' in 
>> configuration 'aix-ppc64-normal-server-release'
> 
> I believe this is fixed in bash-5.1.
Would it be difficult to give me a hint for 5.0. I could test further now i 
have a command that generates the issue. 
> 
> 
>> I added some debug statements to try and catch what is not happening. It 
>> seems that the fifo_list[i].proc value is never being set to (pid_t)-1 so 
>> any call to `unlink_fifo()` or `unlink_fifo_list()` does not unlink the 
>> special file created.
> 
> Probably because the process substitution does not exit before the shell does.
I was hoping that is what the wait routines were for. Also noticed that the 
second fifo never gets a pid. 
> -- 
> ``The lyf so short, the craft so long to lerne.'' - Chaucer
>        ``Ars longa, vita brevis'' - Hippocrates
> Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/