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

[Chet Ramey]

On 3/11/21 3:55 PM, Michael Felt (aixtools) wrote:
> 
>
> 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 can't reproduce it, but you can look at unlink_all_fifos() in bash-5.1.
It's defined in subst.c and called in shell.c.

> > 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.

Bash doesn't wait for asynchronous processes before it exits unless you use
`wait'.


--
``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/