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Re: System commands using CGI

by ColonelPanic (Friar)
on Dec 03, 2012 at 09:07 UTC ( #1006824=note: print w/replies, xml ) Need Help??

in reply to System commands using CGI

Obligatory standard response:

use strict; use warnings;

This will encourage you to write better code, in particular declaring all of your variables as lexical.

use CGI;

It is much better to use the CGI module to handle your output, rather than rolling your own. For a discussion of this, see one of the great ancient works of the monastery.

use CGI::Carp qw/fatalsToBrowser/;

This enables you to see your script's fatal errors in the browser. Essential for debugging.

Finally, checking the error given by system would probably be helpful:

my $err = system("who",">>/var/www/cgi-bin/new.txt"); unless ($err == 0) { die "who command failed: $?"; }

See the documentation for system for more information on checking the error codes.

When's the last time you used duct tape on a duct? --Larry Wall

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