Re: [uml-devel] handle_trap - failed to wait at end of syscall

[Jeff Dike <jdike@addtoit.com>]

gmarzot@nortelnetworks.com said:
> In our case the UML is launched like this:
> perl script
>    my $pid = fork();
>    if ($pid == 0) {
>       setpgrp(); # give all UMLs the same group id so I can renice them
>       exec($cmd); 

I think I understand what's happening.  You are (unwittingly) sending UML
(and every process that belongs to it) a HUP when you, in effect, detach it
from its parent terminal.

My first thought was that SIGHUP isn't disabled in the userspace process,
and it should be, but it is, so I don't know why it's even being seen by
the ptracer.  It should only see signals which are enabled in the child.

In the meantime, while we figure this out, you might try just adding "nohup"
to the beginning of your $cmd.

				Jeff



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