> -----Original Message----- > From: Alexander Kanavin <alex.kana...@gmail.com> > Sent: Saturday, February 9, 2019 8:24 PM > To: Diego Santa Cruz <diego.santac...@spinetix.com> > Cc: openembedded-core@lists.openembedded.org > Subject: Re: [OE-core] Problem with blocked signals in daemons started from > rpm postinstall scriptlet > > On Sat, 9 Feb 2019 at 19:55, Diego Santa Cruz via Openembedded-core > <openembedded-core@lists.openembedded.org> wrote: > > I am having problems with daemons that get started from the rpm > postinstall scriptlet, via update-rc.d, that they cannot be killed. > Investigating I > discovered that they have most signals blocked. My guess is that rpm blocks > almost all signals so that scriptlets do not fail, but as the signal mask is > inherited across fork and exec the daemons end up being blocked. Looking at > update-rc.d it is a simple shell script which does not reset the signal mask, > so > any daemons started from there inherit the signal mask. > > > > Even worse, things like ntp which rely on SIGALRM fail to work properly > when started from the postinstall scriptlet. > > > > Any ideas on how could this be solved, I am considering tweaking update- > rc.d to ignore the -s option as a workaround, at least it avoids the issue and > anyhow in my setup I always reboot after installing or updating packages. > Any other ideas? > > I'd suggest you take this to rpm upstream. Obviously rpm is widely > used in Fedora, RHEL and other distros, so somehow people can find a > way around this. >
I'll try to, but I this is a non-issue on those distros. They use systemd and in that context the daemons are not started by the rpm post-install, but from systemd, so there is no issue with daemons inheriting the signal mask (nor other process settings); the post-install just requests that systemd starts the daemon. -- Diego Santa Cruz, PhD Technology Architect spinetix.com -- _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.openembedded.org/mailman/listinfo/openembedded-core
