Beefy Boxes and Bandwidth Generously Provided by pair Networks
more useful options
 
PerlMonks  

Re: System commands using CGI

by ColonelPanic (Friar)
on Dec 03, 2012 at 09:07 UTC ( [id://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

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://1006824]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others lurking in the Monastery: (5)
As of 2024-03-28 17:31 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found