Can't argue with that! Here's a more secure version. 
#!/usr/bin/perl -wT
 
use strict;
 
# debug mode
BEGIN {
#   use CGI::Carp qw(carpout fatalsToBrowser);
#   &carpout (\*STDOUT);
}
 
# declare global vars
our ($hour, $minute, $day, $meridiem);
 
use CGI;
my $q = new CGI;
print $q->header();
print "<center>\n";
&print_at_form;
&create_at_job if $q->param('Submit');
 
### Subroutines ###
sub print_at_form {
    print $q->startform();
    print "Hour";
    print $q->popup_menu(-name=>'hour', -values=>[1..12]);
    print "Minutes";
    print $q->popup_menu(-name=>'minute', -values=>[qw/00 05 10 15 20 
+25 30 35 40 45 50 55/]);
    print "Day";
    print $q->popup_menu(-name=>'day', -values=>[qw/Today Mon Tue Wed 
+Thu Fri Sat Sun/]);
    print $q->radio_group(-name=>'meridiem', -values=>[qw/am pm/]);
    print $q->submit(-name=>'Submit');
    print $q->endform();
}
 
sub _untaint {
    $ENV{"PATH"} = "";
    if ($q->param('hour') =~ /^(1|2|3|4|5|6|7|8|9|10|11|12)$/) { $hour
+ = $1; } else { die "Can't untaint 'hour'"}
    if ($q->param('minute') =~ /^(00|05|10|15|20|25|30|35|40|45|50|55)
+$/) { $minute = $1; } else { die "Can't untaint 'minute'"}
    if ($q->param('day') =~ /^(Today|Mon|Tue|Wed|Thu|Fri|Sat|Sun|)$/) 
+{ $day = $1; } else { die "Can't untaint 'day'"}
    if ($q->param('meridiem') =~ /^(am|pm)$/) { $meridiem = $1; } else
+ { die "Can't untaint 'meridiem'"}
}
 
sub create_at_job {
    _untaint;
    my $string = "/usr/bin/at $hour:$minute $meridiem $day";
    my $pid = open(ATJOB, "| $string") or die "Couldn't fork: $!\n";
    print ATJOB "touch /foo/bar/some_file\n";
    close(ATJOB);
    print "Your job has been scheduled for <b>$hour:$minute $meridiem 
+$day</b>";
}

[download]

In reply to Re: Re: Web Interface to the at Command by kingman
in thread Web Interface to the at Command by kingman

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.