Hi Richard,
Do you mean the `/tmp/qemu-tap-locks/tapX.lock` file which is generated
by:
> possibles = re.findall(tap_re, ip_link, re.M)
> tap = ""
> for p in possibles:
> lockfile = os.path.join(lockdir, p)
> if os.path.exists('%s.skip' % lockfile):
> logger.info('Found %s.skip, skipping %s' % (lockfile, p))
> continue
> self.taplock = lockfile + '.lock'
?
How should I use it then? :) Something like `basename /tmp/qemu-tap-
locks/tap0.lock | sed "s/[^0-9]//g"` and pass it into variable? It's
not very unique or straight forward, is it?
Looking into qemuboot.conf, maybe @CLIENT@ could be feasible. But the
main problem is, that I need a @variable@ inside "cmd" while it's
evaluated there. The @CLIENT@ nor @TAP@ are used in setup_tap nor
setup_cmd.
What do you mean by PID? Do you mean to use `ps` to get the pid or
somehow call `os.getpid()`?
Would it be possible to provide me an example(s) how to achieve it ? :)
Many thanks for support,
Zuzana
On Mon, 2026-06-08 at 12:19 +0100, Richard Purdie wrote:
> On Sun, 2026-06-07 at 19:40 +0200, Zuzana via lists.openembedded.org
> wrote:
> > In some cases like running multiple QEMUs, would be nice to have an
> > option
> > to distinguish between them. For this reason I introduce an unique
> > instance
> > ID based on time. Later in cmd, the '@INSTANCE_ID@' could be used
> > for QEMU
> > identification.
> >
> > Signed-off-by: Zuzana Valekova Spitalova
> > <[email protected]>
> > ---
> > scripts/runqemu | 7 +++++++
> > 1 file changed, 7 insertions(+)
>
> Note that we already have the taplocks and IP addresses for the
> guests,
> there is also the PID of qemu as a unique ID. Why would we need
> something else as well? Can you not use the PID?
>
> Cheers,
>
> Richard
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