Ted Ashton wrote:
>
> Thus it was written in the epistle of Mark Bixby,
> > Ted Ashton wrote:
> > >
> > > First, the warning.  I have discovered that at least in some circumstances,
> > > MPE::IMAGE does not play well with system().  I would appreciate it if
> > > someone could confirm that the following (be sure to change the database
> > > name and password) hangs on the system() call:
> > >
> > > use MPE::IMAGE qw(:all);
> > > my $db = DbOpen('TEST.DATABASE','MYPASS',5);
> > > print "Made it thus far . . .\n";
> > > system('callci','showjob');
> >
> > The Perl system() function is going to have to fork a shell, and fork cannot
> > handle open TurboIMAGE databases.
>
> Bing!  I'd forgotten that.  Thanks!  Evidently it can't handle forking when
> an IMAGE database *has been open*, as adding a DbClose() before the system()
> call doesn't solve the problem.  Does that fit with what others understand
> about the problem?

But according to the stack trace, we haven't even called POSIX system() or
fork() yet.  It is the Perl interpreter that has decided to call sleep().

I think that to understand why Perl is calling sleep(), you will need to look
at the Perl interpreter source code.
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