Hijacking perl functions

sweetblood has asked for the wisdom of the Perl Monks concerning the following question:

Does anyone know of a way to hijack one of perls function names?
I'd like to create a new chmod function(sub) replacing perls builtin.
I know I can just call it my_chmod or something likt that, but if I can I'd prefer not to.

Any suggestion?

TIA

Sweetblood

Comment on Hijacking perl functions

Replies are listed 'Best First'.
Re: Hijacking perl functions by ysth (Canon) on Jul 29, 2004 at 18:14 UTC
See perldoc perlsub "Overriding Built-in Functions"	[reply]
Re: Hijacking perl functions by japhy (Canon) on Jul 29, 2004 at 18:38 UTC
If you're looking to write a symbolic chmod function, I already wrote one. _____________________________________________________ Jeff `japhy` Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and `perl` hacker How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart	[reply]
Re^2: Hijacking perl functions by sweetblood (Prior) on Jul 29, 2004 at 18:49 UTC
Very cool! But not what I'm doing. I have a script that does a chmod on a config file, but if the file is not owned by the user of my script it dies. So, I want to subvert chmod by having it create a new config from the old, replace the old with the new and chmod that file. So in the end the config file would be owned by the scripts user and have the proper perms. I know that this would require read permissions for my user, but in this case that is not an issue as I have control over the file. Thanks! Sweetblood	[reply]
Re^3: Hijacking perl functions by eric256 (Parson) on Jul 29, 2004 at 23:01 UTC
I'm curious why you would want that to be the general case for every chmod call? Wouldn't that be better suited as config_chmod since it is so specialized? ___________ Eric Hodges	[reply]
Re^4: Hijacking perl functions by sweetblood (Prior) on Jul 29, 2004 at 23:37 UTC
Re^5: Hijacking perl functions by kryten (Scribe) on Jul 30, 2004 at 10:30 UTC
Re^3: Hijacking perl functions by Nitrox (Chaplain) on Jul 30, 2004 at 00:13 UTC
If the user doesn't have the proper perms to chmod the old config how is the script going to relace the old one with the new one? -Nitrox	[reply]
Re^4: Hijacking perl functions by mhi (Friar) on Jul 30, 2004 at 06:14 UTC
Re^3: Hijacking perl functions by danielcid (Scribe) on Jul 30, 2004 at 12:35 UTC
You will need write permission to replace this file (not only read permission). If your user can't chmod, he will be unable to remove this file too... -DBC	[reply]
Re^4: Hijacking perl functions by mhi (Friar) on Jul 30, 2004 at 19:43 UTC
Re^5: Hijacking perl functions by danielcid (Scribe) on Aug 03, 2004 at 13:04 UTC

Back to Seekers of Perl Wisdom