> open (PS, "ps -ef|grep /usr/sbin/[n]amed |") or die "not spawn ps $!";
ps -ef works, so does grep... but if named isn't running (or
/usr/sbin/[n]amed doesn't match it), you won't be able to read much from PS.
> for (;<PS>;) {
> push @arry, (split)[1];
> }
(Why not 'while (<PS>)' instead? It's the same number of characters and
is more readable, IMO.)
If named isn't running, @arry will not grow.
> if (scalar @arry < 1) { ... }
named wasn't running so @arry == 0, and you try to run named.
> open (PSO, "ps -p$arry[0] -o vsz |")
Perhaps named is running now, but $arry[0] is still undef (so you get a
warning about undef being used as '' -- which ps doesn't like, besides).
When you tried running named, you probably wanted to add named's pid to
@arry, or do something else if it still isn't running even after you try
to start it.
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