On Wed, 3 Aug 2005, Mike Branda wrote:
> On Wed, 2005-08-03 at 17:13 -0400, Eben King wrote:
> > On Wed, 3 Aug 2005, Mike Branda wrote:
>
> > > if [ -e $logdir/$file1 ] && [ -e $logdir/$file2 ]
> >
> > You could maybe speed that up, dunno:
> >
> > if [[ ( -e $logdir/$file1 ) && ( -e $logdir/$file2 ) ]]
> >
> > With [], if $foo contains a space or other "bad" character, you have to
> > write "$foo". Not so with [[]].
>
> I just figured out that if [ -e $logdir/$file1 ] is what's doing it.
> The idea was to test for the existance of one or both files and run
> commands accordingly. So it's trying to test the expansion of both
> files.
>
> + '['
> -e /home/wacky1/cumulativelog/access.log.2005-07-01.gz /home/wacky1/cumulativelog/access.log.2005-08-01.gz ']
>
> gotta love that -x flag of bash. Anyway, how do I tell it to care only
> if a .gz file exists and not expand all of $file1 in the statement?
Well, if you're going to do something like
for file in *.gz ; do
# stuff
done
anyhow, then you could put
[[ -e $file ]] || exit
inside it. If there are no *.gz files, the "*" won't be expanded and the
loop will be run (once) with file="*.gz". Usually that won't exist, so in
that case it aborts.
The other code I can think of is something like
[[ $(ls -1 *.gz 2> /dev/null | wc -l) -eq 0 ]] && exit 1
before everything. I think checking for the existence of each file takes
less time than listing and counting them all, but you should do timings if
it's critical.
--
-eben ebQenW1@EtaRmpTabYayU.rIr.OcoPm home.tampabay.rr.com/hactar
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