XPost: linux.debian.bugs.dist   
   From: bdrung@debian.org   
      
   On Sat, 2026-01-24 at 14:22 +0100, Santiago Vila wrote:   
   > retitle 1125948 dracut: fails to detect 3cpio   
   > thanks   
   >    
   > On Fri, Jan 23, 2026 at 09:39:07PM +0100, Benjamin Drung wrote:   
   > > [...]   
   > >    
   > > Is the 3cpio --help call failing? If so, why?   
   >    
   > Thanks a lot for this detailed explanation about how all this is (was)   
   > supposed to work.   
   >    
   > I'm doing a retitle to better reflect what we know about this failure.   
   > (Based on your explanations, if the autodetection worked as designed   
   > then there would be nothing wrong in calling "3cpio" as "3cpio").   
   >    
   >    
   > This looks like some kind of race condition to me, similar to this one   
   > which happened some time ago in the "sumo" package. This is the   
   > message where Niels diagnosed the problem and solved the mystery:   
   >    
   > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1082135#19   
   >    
   > With the sumo package in mind, I looked at the dracut script   
   > to see if there was any occurrence of "&", and found that   
   > there is a "parallel mode".   
   >    
   > Can you tell if this parallel mode is the default, and if not, what   
   > other reasons for a race condition can be?   
      
   I am not aware of any "parallel mode" here. The postinst calls dracut   
   just with >&2 to redirect stdout to stderr.   
      
   > I would be willing to build linux-signed-amd64 a lot of times using a   
   > modified dracut package with whatever debug changes we could add to   
   > see what's going on (even if they are simple "echo foo"), so I'm   
   > open for suggestions about those potential changes.   
      
   Thanks. Could you try to run a test with this patch applied to dracut:   
   https://github.com/dracut-ng/dracut-ng/pull/2109/changes   
      
   Plus add an "exit 1" after those 3 dinfo/dwarning calls to let dracut   
   fail, because I expect dracut to take the happy path.   
      
   --    
   Benjamin Drung   
   Debian & Ubuntu Developer   
      
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