HTTP/2 200 cache-control: max-age=43200 server: Combust/Plack (Perl) vary: Accept-Encoding content-encoding: gzip content-length: 1689 content-type: text/html; charset=utf-8 last-modified: Sat, 11 Oct 2025 15:52:05 GMT traceparent: 65544d397395753c468dbd0ec5fc7d48 strict-transport-security: max-age=15768000 Front page | perl.perl5.porters | Postings from July 2008

Re: FW: Alarums and Excursions (was [perl #2783] Security of ARGVusing 2-argument open)

Thread Previous

* Ed Avis <eda@waniasset.com> [2008-07-28 19:00]:
> Rafael Garcia-Suarez wrote:
>> We can add a simple way to restore the old behaviour, though :
>> a command-line flag (-N and -P were suggested as counterparts
>> to -n and -p. -P was conveniently made free previously:) 
>
> I don't think it matters much if -n and -p continue being the
> magical file loop as at present.  For quick oneliners you often
> want the extra power, and don't really care about whether it's
> safe in general.
OTOH when writing one-liners you are usually closest to the
shell with its process substitution feature, so unless you are
on Windows that’s when the feature provided by 2-arg open matters
least.
It’s more useful when the diamond is used deep inside a program
(perhaps with `local *ARGV = [ @api_client_input_goes_here ]`),
and is documented as API, since that’s when you can’t easily do
process substitution in another way. (It’s *possible*, even if
the function expects a filename and uses 3-arg open: you can pass
it a reference to a tied scalar as the filename. Yes, very
pretty.)
Regards,
-- 
Aristotle Pagaltzis // <https://plasmasturm.org/>

Thread Previous

• FW: Alarums and Excursions (was [perl #2783] Security of ARGV using 2-argument open) by Ed Avis
• Re: FW: Alarums and Excursions (was [perl #2783] Security of ARGVusing 2-argument open) by Aristotle Pagaltzis