GNU bug report logs - #35762
When `test-driver` script + `check` testing framework are writing to same logfile = corrupted output

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Message #14 received at 35762 <at> debbugs.gnu.org (full text, mbox):

From: howaboutsynergy <at> protonmail.com
To: "35762 <at> debbugs.gnu.org" <35762 <at> debbugs.gnu.org>
Subject: Re: bug#35762: (No Subject)
Date: Thu, 16 May 2019 18:25:57 +0000

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‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Thursday, May 16, 2019 8:12 PM, Eric Blake <eblake <at> redhat.com> wrote:

> On 5/16/19 12:40 PM, howaboutsynergy <at> protonmail.com wrote:
> 

> > A possible fix, or mitigation, based on the answer by John Bollinger[1] follows. I have tested this to work[2] even though it requires changes[2] in the program that created the test(s) executables and that program is 'check' - A unit testing framework for C [3].
> > [1] https://stackoverflow.com/a/56168216/11509478
> > [2] https://github.com/libcheck/check/issues/188#issuecomment-493161758
> > [3] https://github.com/libcheck/check
> > --- /tmp/test-driver 2018-09-18 15:06:54.000000000 +0200
> > +++ /usr/share/automake-1.16/test-driver 2019-05-16 17:58:09.690988983 +0200
> > @@ -104,7 +104,8 @@ trap "st=141; $do_exit" 13
> > trap "st=143; $do_exit" 15
> > 

> > Test script is run here.
> > 

> > =========================
> > 

> > -"$@" >$log_file 2>&1
> > +echo -n "" >"$log_file"
> 

> 'echo -n' is non-portable, but since all you are doing is using it to
> create an empty file, it's simpler to just:
> 

> : >"$log_file"
Very cool! Thank you very much! I'll use that in my local automake rebuild.
Where can I find more information about ":" ? it seems kinda tough to search for.

PS: Sorry for any dups, I previously pressed Reply instead of Reply All. My mistake:)

> 

> > +"$@" >>"$log_file" 2>&1
> > estatus=$?
> > if test $enable_hard_errors = no && test $estatus -eq 99; then
> > (the above patch is also attached)
> > Cheers.
> 

> --
> 

> Eric Blake, Principal Software Engineer
> Red Hat, Inc. +1-919-301-3226
> Virtualization: qemu.org | libvirt.org

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