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#!/usr/local/cpanel/3rdparty/bin/perl

# cpanel - scripts/cleandns                        Copyright 2022 cPanel, L.L.C.
#                                                           All rights reserved.
# copyright@cpanel.net                                         http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited

package scripts::cleandns;

use strict;
use warnings;

use Getopt::Long              ();
use File::Basename            ();
use Cpanel::SafeFile          ();
use Cpanel::DNSLib            ();
use Cpanel::Hostname          ();
use Cpanel::FileUtils::Move   ();
use Cpanel::FileUtils::Copy   ();
use Cpanel::Logger            ();
use Cpanel::SafetyBits        ();
use Cpanel::StringFunc::Count ();
use Cpanel::StringFunc::Match ();

exit main(@ARGV) unless caller();

sub help {
    print "USAGE:\n\t$0\n\nRemoves zones no longer operated by cPanel users on this host, and removes duplicate zone definitions.\n";
    return 1;
}

#Only use prints if you expect to shoot this over to a web interface, otherwise logger() stuff
sub main {
    my @args = @_;

    my $logger = Cpanel::Logger->new();
    my ( $restart, $help );
    Getopt::Long::GetOptionsFromArray(
        \@args,
        v        => \$Cpanel::Debug::level,
        r        => \$restart,
        'h|help' => \$help,
    );
    return help() if $help;

    my $dnslib    = Cpanel::DNSLib->new();
    my $namedconf = $dnslib->{'namedconf'};

    my ( $confstatus, $confresult ) = remove_warnings_checknamedconf( $dnslib->checknamedconf() );

    my @confresults      = split( /\n/, $confresult );
    my @only_dupes       = grep { m/already exists previous definition/i } @confresults;
    my $only_dupe_errors = ( scalar(@only_dupes) == scalar(@confresults) );

    if ( !$confstatus && !$only_dupe_errors ) {
        $logger->warn("Fatal! $namedconf fails named-checkconf, please repair named.conf and try again");
        $logger->warn($confresult);
        print "$namedconf is in a state that cannot be automatically corrected.\n";
        print "Please address these issues and before trying again.";
        return 1;
    }

    my $binduser = $dnslib->{'data'}{'binduser'};
    my $bindgrp  = $dnslib->{'data'}{'bindgroup'};

    my %ZONES = gather_zones( $logger, $dnslib, $namedconf, $binduser, $bindgrp );

    $logger->debug("The following zone and zonefiles were found");
    $logger->debug("zones with out corresponding zone file (and duplicates) will be removed");
    $logger->debug("========================================================");
    foreach my $key ( sort keys %ZONES ) {
        $logger->debug("$key ==> $ZONES{$key}");
    }
    $logger->debug("========================================================");

    Cpanel::FileUtils::Copy::safecopy( $namedconf, $namedconf . '.precleandns' );

    my ( $NDC, $namelock, @CONF ) = build_clean_config( $logger, $namedconf, %ZONES );
    write_cleaned_config( $namedconf, $namelock, $NDC, @CONF );

    ( $confstatus, $confresult ) = remove_warnings_checknamedconf( $dnslib->checknamedconf() );

    if ( !$confstatus ) {
        $logger->warn("cleandns was unable to properly clean $namedconf");
        $logger->warn($confresult);
        $logger->info("Reverting to original version.");
        Cpanel::FileUtils::Copy::safecopy( $namedconf, $namedconf . '.brokencleandns' );
        Cpanel::FileUtils::Move::safemv( "-f", $namedconf . 'precleandns', $namedconf );
        Cpanel::SafetyBits::safe_chown( $binduser, $bindgrp, $namedconf );
        print "There was an error running the DNS cleanup. Please check the cPanel error logs.";
        return 2;
    }

    my $shorthost = Cpanel::Hostname::shorthostname();
    if ( !$shorthost ) {
        $shorthost = 'localhost';
        my $host_name_not_properly_set_msg = "Your hostname is not properly set, please run /usr/local/cpanel/bin/set_hostname";
        say STDERR ($host_name_not_properly_set_msg);
        $logger->warn($host_name_not_properly_set_msg);
    }

    my $numzones = scalar keys %ZONES;
    $logger->info("DNS cleanup successful");
    print "Cleaned up " . $numzones . " zone(s) on $shorthost.";

    if ($restart) {
        $logger->info("Restarting Bind using restartsrv");
        exec '/usr/local/cpanel/scripts/restartsrv', 'named';
    }
    $logger->debug("Bind will not be restarted automatically.");
    $logger->debug("To restart Bind run the following: /usr/local/cpanel/scripts/restartsrv_named");

    return 0;
}

sub _is_line_comment {
    my ( $line, $cppcomment, $callback ) = @_;

    # Rudimentary comment exclusion.
    if ($cppcomment) {
        if ( $line =~ m/\*\// ) {
            $cppcomment = 0;
        }
        $callback->($line) if $callback;
        return ( 1, $cppcomment );
    }
    if ( $line =~ m/^\s*\#/ ) {
        $callback->($line) if $callback;
        return ( 1, $cppcomment );
    }
    if ( $line =~ m/^\s\/\// ) {
        $callback->($line) if $callback;
        return ( 1, $cppcomment );
    }
    if ( $line =~ m/^\s*\/\*/ ) {
        $cppcomment = 1;
        $callback->($line) if $callback;
        return ( 1, $cppcomment );
    }
    return ( 0, $cppcomment );
}

# XXX I am dissatisfied with this loop and build_clean_config being nearly the same.
# This means we are straight up wasting time in this script which is called by dnsadmin
# and hence needs good performance.

sub gather_zones {    ## no critic(ProhibitExcessComplexity)
    my ( $logger, $dnslib, $namedconf, $binduser, $bindgrp ) = @_;

    my %ZONES;
    my $inc      = 0;
    my $seenhint = 0;
    my $zone     = '';
    my ( $numbrace, $zonemarker, $cppcomment, $continue ) = ( 0, 0, 0, 0 );
    my $zonedir = $dnslib->{'data'}{'zonefiledir'};

    # Read through named.conf. Gather hash of zones and zone files
    open( my $NDC, '<', $namedconf ) || $logger->die("Unable to open $namedconf: $!");

    while (<$NDC>) {
        ( $continue, $cppcomment ) = _is_line_comment( $_, $cppcomment );
        next if $continue;

        if ($zonemarker) {
            $numbrace += Cpanel::StringFunc::Count::get_curly_brace_count($_);
            if ( $numbrace == 0 ) {
                $zonemarker = 0;
            }
            if (m/.*[\s\t\;\{]file\s+["']([^"']+)/) {
                my $file        = $1;
                my $relativedir = '';
                if ( !Cpanel::StringFunc::Match::beginmatch( $file, '/' ) ) {
                    if ( $file =~ m/^([^\/]+)/ ) {
                        $relativedir = $1;
                    }
                }
                if ( -e $file ) {
                    $ZONES{$zone} = $file;
                }
                else {
                    my $filename = File::Basename::basename($file);
                    my $filenew  = $zonedir . '/' . $filename;
                    if ( -e $filenew ) {
                        $ZONES{$zone} = $filenew;
                    }
                    elsif ( $relativedir ne ''
                        && -e $zonedir . '/' . $relativedir . '/' . $filename ) {
                        $ZONES{$zone} = $zonedir . '/' . $relativedir . '/' . $filename;
                    }
                    elsif ( -e '/' . $file ) {
                        $ZONES{$zone} = '/' . $file;
                    }
                    else {
                        $ZONES{$zone} = '';
                    }
                }
                next();
            }
            if (m/.*[\s\t\;\{]type\s+slave/) {
                delete( $ZONES{$zone} );
            }
        }
        if (m/\s*zone\s+["']([^"']+)/) {
            $zone       = $1;
            $zonemarker = 1;
            $numbrace += Cpanel::StringFunc::Count::get_curly_brace_count($_);

            if (m/.*[\s\t\;\{]file\s+["']([^"']+)/) {
                my $file        = $1;
                my $relativedir = '';
                if ( !Cpanel::StringFunc::Match::beginmatch( $file, '/' ) ) {
                    if ( $file =~ m/^([^\/]+)/ ) {
                        $relativedir = $1;
                    }
                }
                if ( -e $file ) {
                    $ZONES{$zone} = $file;
                }
                else {
                    my $filename = File::Basename::basename($file);
                    my $filenew  = $zonedir . '/' . $filename;
                    if ( -e $filenew ) {
                        $ZONES{$zone} = $filenew;
                    }
                    elsif ( $relativedir ne ''
                        && -e $zonedir . '/' . $relativedir . '/' . $filename ) {
                        $ZONES{$zone} = $zonedir . '/' . $relativedir . '/' . $filename;
                    }
                    elsif ( -e '/' . $file ) {
                        $ZONES{$zone} = '/' . $file;
                    }
                    elsif ( $zone eq '.' ) {
                        Cpanel::FileUtils::Copy::safecopy( '/usr/local/cpanel/scripts/named.ca', $filenew );
                        Cpanel::SafetyBits::safe_chown( $binduser, $bindgrp, $filenew );
                        $ZONES{$zone} = $filenew;
                    }
                    else {
                        $ZONES{$zone} = '';
                    }
                }
                next;
            }
        }

        if ( !$zonemarker ) {
            next;
        }
        else {
            $numbrace += Cpanel::StringFunc::Count::get_curly_brace_count($_);
            if ( $numbrace == 0 ) {
                $inc = 0;
            }
        }
    }
    close($NDC);
    return %ZONES;
}

sub build_clean_config {
    my ( $logger, $namedconf, %ZONES ) = @_;

    my @CONF;
    my $zone = '';
    my ( $numbrace, $zonemarker, $cppcomment, $continue ) = ( 0, 0, 0, 0 );

    # Modify named.conf and remove bad entries.
    my $namelock = Cpanel::SafeFile::safeopen( my $NDC, "+<", $namedconf );
    if ( !$namelock ) {
        $logger->die("Could not open $namedconf");
    }

    my $seen_already = {};
    my $what_view    = 'none';
    while (<$NDC>) {

        ( $continue, $cppcomment ) = _is_line_comment( $_, $cppcomment, sub { push( @CONF, shift ) } );
        next if $continue;

        #Gotta know what view we are in to filter dupes out
        m/\s*view\s+["']([^"']+)/;
        $what_view = $1 if $1;

        if ($zonemarker) {
            $numbrace += Cpanel::StringFunc::Count::get_curly_brace_count($_);
            if ( $numbrace == 0 ) {
                $zonemarker = 0;
            }
            if ( defined( $ZONES{$zone} ) && $ZONES{$zone} eq '' ) {
                next;
            }
            elsif ( !defined( $ZONES{$zone} ) ) {
                push @CONF, $_;
                next;
            }
            elsif (m/(.*[\s\t\;\{])file\s+["']/) {
                my $space = $1;
                push @CONF, $space . "file \"$ZONES{$zone}\"\;\n";
                next;
            }
            else {
                push @CONF, $_;
                next;
            }
        }
        if (m/\s*zone\s+["']([^"']+)/) {
            $zone = $1;
            $seen_already->{"$what_view.$zone"}++;
            if ( $seen_already->{"$what_view.$zone"} && $seen_already->{"$what_view.$zone"} > 1 ) {
                $zonemarker = 0;
                next;
            }

            $zonemarker = 1;
            $numbrace += Cpanel::StringFunc::Count::get_curly_brace_count($_);
            if ( defined( $ZONES{$zone} ) && $ZONES{$zone} eq '' ) {
                next();
            }
            elsif ( !defined( $ZONES{$zone} ) ) {
                push( @CONF, $_ );
                next();
            }
            elsif (m/(.*[\s\t\;\{])file\s+["']/) {
                my $space = $1;
                push @CONF, $space . "file \"$ZONES{$zone}\"\;\n";
                next;
            }
            else {
                push @CONF, $_;
                next;
            }
        }

        #Evade warnings
        my $skip_dupe_body = ( $what_view && $zone && $seen_already->{"$what_view.$zone"} && $seen_already->{"$what_view.$zone"} > 1 );

        if ( !$zonemarker && !$skip_dupe_body ) {
            push @CONF, $_;
        }
    }

    seek( $NDC, 0, 0 );
    return ( $NDC, $namelock, @CONF );
}

sub write_cleaned_config {
    my ( $namedconf, $namelock, $NDC, @CONF ) = @_;

    my $deadline = 0;
    foreach (@CONF) {
        if (m/^[\r\n\s\t]*$/) {
            $deadline++;
        }
        else {
            $deadline = 0;
        }
        if ( $deadline < 2 ) {
            print $NDC $_;
        }
    }
    print $NDC "\n";

    truncate( $NDC, tell($NDC) );
    unlink("$namedconf.cache");
    Cpanel::SafeFile::safeclose( $NDC, $namelock );
    return 1;
}

sub remove_warnings_checknamedconf {
    my ( $configstatus, $configresult ) = @_;
    return ( $configstatus, $configresult ) if $configstatus;
    my $config_warning_rx = qr/option 'additional-from-cache' is obsolete/;
    my @errors            = split "\n", $configresult;
    return ( $configstatus, $configresult ) unless scalar @errors;
    my $new_config_result = [];
    foreach my $errorLine (@errors) {
        push @{$new_config_result}, $errorLine unless $errorLine =~ /$config_warning_rx/;
    }
    $configstatus = 1 if $#{$new_config_result} < 0;
    $configresult = join( "\n", @{$new_config_result} );
    return ( $configstatus, $configresult );

}

1;    #magic true since this is included in build-tools/clean_test_cruft

Rosenblum TV: Video training, virtual workshops, classes, tutorials
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  • About
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  • Case Studies
    • The BBC
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    • Oyster Yachts
    • Scottish Environmental Protection Agency
  • The Power of Storytelling
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  • Michael on Media
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RE-INVENTING THE TELEVISION NEWS BUSINESS*

A revolution in video storytelling

Creating entirely new & cost-effective production methods

From the world leaders in video production training and the creators of Character Driven Storytelling™

*and every other business that uses video

WHAT WE DO

Over the past 35 years, we have designed, built or restructured some of the most powerful news and journalism companies in the world.

We replace the traditional TV news ‘crew’ with one highly trained journalist, working alone with nothing but an iPhone.

No more TV news ‘crews’, no editors and no field producers.

This is television news done the way newspaper journalism is done – one reporter with their electronic pad and pencil.

In doing this, we can cut the cost of production by as much as 75% while increasing ratings and audience engagement.

In the place of conventional TV news ‘packages’ – ie, reporter stand up, interview, b-roll, man on the street, we marry great journalism with Netflix and Hollywood storytelling.

It’s a combination that works.

We have taken most of our clients to #1 in their respective markets.

And it’s not just for news. Any company, any profit, any NGO and anyone else who is online needs to tell their story in compelling yet cost-effective video. We can teach you to do that. Either in person or virtually.

EXAMPLES OF WHAT WE CAN TEACH YOUR STAFF TO PRODUCE

ITAY HOD

Itay Hod, MMJ with KPIX/CBS in San Francisco, took the 5-Day Intensive Video Storytelling Bootcamp in 2018.

Because he works alone, with only an iPhone, he was able to embed himself with a homeless family.

Here’s the story he produced in a one-day turn.

KIET DO

Kiet Do, an MMJ with KPIX/CBS in San Francisco, took the 5-Day Intensive Video Storytelling Bootcamp in 2021.

Here is a story he produced, all on his own, with only an iPhone and in a one-day turn.

TAYLOR SCHAUB

Taylor Schaub, an MMJ with Spectrum News 1 in LA, took the 5-Day Intensive Video Storytelling Bootcamp in 2023.

Here is a story he turned in only one day, using only an iPhone. It was the first video story he ever did and it was nominated for an Emmy.

THE BOOTCAMP

How do we convert stations and whole networks to working in this way?

Since 1988, we have run intensive 5-Day Video Storytelling Bootcamps

We have done these all over the world.

These are hands-on bootcamps, and participants learn an entirely new way of creating TV news stories.

-We shoot at a 3:1 ratio or lower, so turnaround times are fast.

-We go directly from camera to timelilne and edit – no written scripts.  We work in the medium of pictures and sound.

-We are entirely character-driven.

-We are driven by pictures and real events.

-We are focused almost entirely on ’the viewer experience’.

Since 1988, more than 70,000 journalists around the world have taken our bootcamps, either in person on virtualy.

Case Studies

CBS Case Study Logos
CBS News

We have started to work with CBS News, bringing our ideas of character-driven storytelling to one of the most successful and biggest networks in the United States. Since beginning to work with them ratings have climbed and more importantly, audience engagement is through the ceiling.

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New York Times Television

We started New York Times Television in 1990 and it was the first paper to be brought into the world of TV. It quickly became one of the most successful non-fiction production companies in the United States. The series and documentaries we produced won many awards including multiple Emmys.

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The BBC

We have been working with the BBC since the year 2000 helping to convert their national news network to our visual storytelling technique. Most recently we have trained teams from their sports, documentaries, and comedy divisions to make character-driven stories using only smartphones.

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Spectrum News

For the past five years we have worked with Spectrum News to introduce and train their journalists on visual, character driven storytelling using smartphones helping to create a different kind of local news for their network of 24-Hour News Stations across the United States.

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The United Nations

In 2006, we were approached by the United Nations. Rather than rely on news outlets, it would be much easier to train the field operatives to produce their own stories. We spent two years working with the UN, training more than 100 of their staff in bootcamps in Geneva and Nairobi.

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The Newark Star-Ledger

We trained 50 print reporters at the paper to shoot and tell their own stories, in conjunction with their print work. We built a TV newsroom in their existing print newsroom – you could not ask for a better set and they began to live stream their stories in conjunction with their print work.

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Mcgraw Hill

We spent two years with McGraw Hill, training more than 150 of their staffers, making them completely video literate. McGraw/Hill media properties we transit included Business Week, Aviation Week, (what was the name of the architecture magazine), and JD Power and Associates.

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Voice of America

In 1990, we were approached by The Voice of America, the official broadcasting agency for the United States Government. When we met with VOA, they were only a short wave radio broadcaster, but working with them, we took them into television, launching VOA-TV.

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Oyster Yachts

British based Oyster Yachts makes some of the finest yachts in the world. Like every other company, they had to find a way to feed the never-ending video demands of social media – sites like Instagram and TikTok. We trained the Oyster staff to tell their own stories, using only iPhones.

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Scottish Environmental Protection Agency

We were approached by SEPA, the Scottish Environmental Protection Agency because they had to continually find a way to ‘feed the media beast’. The result was that SEPA was able to tell their own stories, whenever they wanted, and at almost no additional cost.

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Image 11-11-22 at 6.25 PM

Michael on Media

Michael Rosenblum has been writing about the media since 1988. His work and ideas have appeared in The Guardian, The Huffington Post, Ilkeston Life and many other publications.

He has been blogging regularly for the past 35 years on this subject. Having taught media studies at Columbia University, NYU and now the University of Oxford, he is considered an expert on this subject.

Continue reading this post or look back at previous posts.

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