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- Prevent removal of configuration items before the script path in new entries in loncapa
  cron.

<!DOCTYPE piml PUBLIC "-//TUX/DTD piml 1.0 Final//EN" 
	"http://lpml.sourceforge.net/DTD/piml.dtd">
<!-- cron_lpmlcheck.piml -->
<!-- Matthew Hall -->

<!-- $Id: cron_lpmlcheck.piml,v 1.3 2010/06/25 16:39:01 raeburn Exp $ -->

<!--

This file is part of the LearningOnline Network with CAPA (LON-CAPA).

LON-CAPA is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

LON-CAPA is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with LON-CAPA; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

/home/httpd/html/adm/gpl.txt

http://www.lon-capa.org/

-->

<piml>
<targetroot>/</targetroot>
<files>
<file>
<target dist="default">/home/httpd/lonUsers</target>
<perlscript mode="fg">
if (-e '/etc/cron.d/loncapa.lpmlsave') {
    unlink ('/etc/cron.d/loncapa.lpmlsave');
}
print "\nUpdating /etc/cron.d/loncapa configuration file\n";
my (@configs,@commands,@standard,%checked,%custom,%customargs);
my $count = 0;
my $changes = 0;
if (open(my $locfh,"&lt;/home/httpd/lib/perl/loncapa_cron-std")) {
    while (&lt;$locfh&gt;) {
        my $line = $_;
        chomp($line);
        $standard[$count] = $line;
        if ($line =~ m{^#?\s*\d+[^/]+/}) {
            my ($config,$script) = split('/',$line,2);
            $script =~ s/\s+$//;
            my ($cmd,@args) = split(/\s+/,$script);
            $commands[$count] = &escape('/'.$cmd);
            $configs[$count] = $config;
        }
        $standard[$count] = $line;
        $count ++;
    }
    close($locfh);
    if (open(my $stdfh,"&lt;/etc/cron.d/loncapa")) {
        while(&lt;$stdfh&gt;) {
            my $line = $_;
            chomp($line);
            if ($line =~ m{#?\s*\d+[^/]+/}) {
                my ($config,$script) = split('/',$line,2);
                $script =~ s/\s+$//;
                my ($cmd,@args) = split(/\s+/,$script);
                my $key = &escape('/'.$cmd);
                $custom{$key} = $config;
                $customargs{$key} = \@args;
            }
        }
    }
    if (open(my $newfh,"&gt;/etc/cron.d/loncapa")) {
        for (my $i=0; $i<@standard; $i++) {
            if ($commands[$i] ne '') {
                my $unesc = &unescape($commands[$i]);
                if ($custom{$commands[$i]} eq '') {
                    print $newfh $standard[$i]."\n";
                } elsif ($custom{$commands[$i]} ne $configs[$i]) {
                    print $newfh $custom{$commands[$i]}.$unesc;
                    if (ref($customargs{$commands[$i]}) eq 'ARRAY') {
                        if (@{$customargs{$commands[$i]}} > 0) {
                            print $newfh ' '.join(' ',@{$customargs{$commands[$i]}});
                        }
                    }
                    print $newfh "\n";
                    $changes ++;
                } else {
                    print $newfh $standard[$i]."\n";
                }
                $checked{$commands[$i]} = 1;
            } else {
                print $newfh $standard[$i]."\n";
            }
        }
        foreach my $key (sort(keys(%custom))) {
            unless ($checked{$key}) {
                my $unesc = &unescape($key);
                print $newfh $custom{$key}.$unesc;
                if (ref($customargs{$key}) eq 'ARRAY') {
                    if (@{$customargs{$key}} > 0) {
                        print $newfh ' '.join(' ',@{$customargs{$key}});
                    }
                }
                print $newfh "\n";
            }
        }
        close($newfh);
    }
}
if ($changes&gt;1) {
    print "$changes customized lines preserved in /etc/cron.d/loncapa\n"; 
} elsif ($changes==1) {
    print "One customized line preserved in /etc/cron.d/loncapa\n"; 
}

sub escape {
    my $str=shift;
    $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
    return $str;
}

sub unescape {
    my $str=shift;
    $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
    return $str;
}
</perlscript>
</file>
</files>
</piml>