Re: Ctrl+C from sh can shut down daemonized PostgreSQL cluster

On 14/02 14.57, Kevin Grittner wrote:
> We have had a case where a production cluster was accidentally shut
> down by a customer who used Ctrl+C in the same sh session in which
> they had (long before) run pg_ctl start.  We have only seen this in
> sh on Solaris.  Other shells on Solaris don't behave this way, nor
> does sh on tested versions of Linux.  Nevertheless, the problem is
> seen on the default shell for a supported OS.

What Solaris version, and what version of sh? sh on Solaris isn't
necessarily the "real" bourne shell. In Solaris 11 it's actually
ksh93.

I've seen a sort-of opposite problem which does not appear in stock
Solaris 10 or 11 but in OpenSolaris, at least the version I used to
have on my desktop.

And this was not PostgreSQL but MySQL.... There's a script mysqld_safe
which will automatically restart the mysqld server if it dies. But in
OpenSolaris with ksh version '93t', if I killed mysqld, the shell that
started it also died. I never could figure out why. Solaris 11 with
ksh '93u' does not have this problem. Nor does Solaris 10 with "real" sh.

Is this customer by any chance running OpenSolaris?

- Bjorn