I originally did, but I wanted to be able to have the working directory reset to its original value when the program exits. The only way I know to do this is my $old_dir = `pwd`, and the output of the pwd program causes $old_dir to be tainted.

From what I can gather, the only proper way to untaint data is to using a regular expression. Something along the lines of this I believe: my ($untainted) = $old_dir =~ /^(.*)/. Then I could use chdir $untainted without getting a warning of an insecure dependency in chdir. If I understand it correctly, this is how you convince perl that you have filtered the input of any harmfull input. Will my code above cause some insecurity because of it blindly untainting the input of pwd??

Thanks for the link to the perlsec. I have looked it over a few times but it is one document that I need to read over more thouroughly. I am not a security expert, that is for sure!

Thanks!
zzspectrez

In reply to RE: Re: Using perl to automate mail backup by zzspectrez
in thread Using perl to automate mail backup by zzspectrez

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