On Sun, Oct 05, 2003 at 11:32:11AM -0400, Dan Langille wrote:
> Hi,
>
> I have a perl regex to test if a file resides under a particular
> directory. The test looks like this:
>
> if ($filename =~ $directory) {
> # yes, this filename resides under directory
> }
>
> This is working for most cases. However, it fails is the directory
> contains a +. For example:
>
> $filename = 'ports/www/privoxy+ipv6/files/patch-src::addrlist.c';
>
> $match = "^/?" . 'ports/www/privoxy+ipv6' . "/";
> if ($filename =~ $match) {
> print "found\n";
> } else{
> print "NOT found\n";
> }
>
> Yes, I can escapte the + in the directory name, but then I'd have to test
> for all those special regex characters and escape them too.
That's why perl has the \Q...\E metasymbols:
Try:
$match = qr{^/?\Q$dirname\E/};
See perldoc perlre for details.
Cheers,
Matthew
--
Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks
Savill Way
PGP: http://www.infracaninophile.co.uk/pgpkey Marlow
Tel: +44 1628 476614 Bucks., SL7 1TH UK
pgp00000.pgp
Description: PGP signature
