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Re: Running External Commands

by Michalis (Pilgrim)
on Jun 06, 2000 at 16:33 UTC ( #16590=note: print w/ replies, xml ) Need Help??

in reply to Running External Commands

The best way (to my knowledge) to do that is to use backticks, assigning the result to a scalar (the output doesn't have to be a single line, or a single word or anything. For example:

$result=`/bin/tail -15 /var/adm/messages`;
You should be very careful though, if you decide to pass to the command options from the user's input (for example through a CGI script). But that's a fact, either you use backticks or system.

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RE: Re: Running External Commands
by ivey (Beadle) on Jun 06, 2000 at 18:38 UTC
    Since you've almost mentioned taint checking, I figured I'd jump in with a link to a taint checking FAQ.

    CGI/Perl Taint Mode FAQ

    Taint checking, for those that don't know, is how you solve the "be very careful" issue that Michalis mentioned.

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