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Re: reboot stuff doesn't start




On Tue, May 28, 2019 at 04:52:52PM -0400, Gene Heskett wrote:
> On Tuesday 28 May 2019 01:32:31 pm Reco wrote:
> 
> > On Tue, May 28, 2019 at 01:23:45PM -0400, Gene Heskett wrote:
> > > > End users can remove that '-e' flag if they believe it's
> > > > problematic. rc.local is a simple shell script, open to all kinds
> > > > of abuse including this one.
> > >
> > > I assume the -e is a bash option?
> >
> > Any POSIX-compliant shell knows about '-e', bash included.
> > Your own rc.local has this shebang: #!/bin/sh -e
> >
> > > I just rescanned the man page without
> > > find a reference other than a test for file -e=exists filename.
> >
> > dash(1) references it. bash(1) lists '-e' as an option to "set"
> > command.
> >
> > > It is in the shebang line, so what does that do when its in that
> > > position.
> >
> > Quoting bash(1):
> >
> >   -e  Exit  immediately if a pipeline (which may consist of a single
> > simple command), a list, or a compound command (see SHELL GRAMMAR
> > above), exits with a non-zero status.
>
> How about a daemon that never exits, but does report its pid on the next 
> line when launched with a trailing &

They call such programs a curious perversion in IT usually.
Luckily it does not matter for the start-stop-daemon (it can derive pid more
straightforward way) nor it does matter to systemd (there are cgroups
for that).


> I'm also seeing several can't connect to d-bus messages, only ID'd by the 
> pid.  That means whatever its pid is, isn't working.

Like I wrote earlier - nothing that you put into rc.local belongs there.
I suppose that the thing is written to be launched from the inside the
user session, where you have dbus session already.

Reco