--- /dev/null
+#!/usr/bin/env perl
+use strict;
+use warnings;
+#################################################################################
+#
+# VERSION
+#
+#################################################################################
+my $VERSION = '0.0.1';
+# NB 14.03.19
+# - create script: ?
+
+#################################################################################
+#
+# GLOBALS
+#
+#################################################################################
+my ($NAME) = $0 =~ m,([^/]+)$,;
+
+#################################################################################
+#
+# ARGS
+#
+#################################################################################
+my $VERBOSE = $main::VERBOSE = 1;
+my $DEBUG = $main::DEBUG = 0;
+
+my %Opt = (
+);
+get_options(\%Opt);
+help() unless @ARGV;
+$main::_DATA_ = undef;
+
+#################################################################################
+#
+# BEGIN
+#
+#################################################################################
+use Data::Dumper;
+my $diff = 0;
+my $exp = shift @ARGV;
+
+#
+# Parse src file
+#
+my @src = map {chomp; $_} grep {/^(\w+=|\*|\d+)/} <>;
+
+for (my $i=0;$i<@src;$i++) {
+
+ $_ = $src[$i];
+
+ if (@_=/^
+ (
+ (?:[\*\d\/-]+\s+){5}
+ |(?:@\w+\s+)
+ )
+ (\S+)\s+(.*)$/x) {
+ my $when = $1; chop $when;
+ my $user = $2;
+ my $cmd = $3;
+ print Dumper(\@_);
+ exit;
+ }
+ my @F = split(" ",$src[$i]);
+
+ next if $src[$i] !~ /^[\*\d]/ or @F<6;
+ if ($F[5] ne "root"){
+ $_ = join(" ",@F[6..$#F]);
+ s/"/\\"/g;
+ @_=qq|su -l "$F[5]" -c "$_"|;
+ @F = (@F[0..4],"",@_);
+ };
+
+ $src[$i] = join(" ",@F[0..4,6..$#F]);
+}
+0 and warn join("\n",@src);
+my %src = map {$_=>1} @src;
+
+#
+# Fiter existing crontab
+#
+@ARGV = ("crontab -l|");
+my @cron = map {chomp; $_} <>;
+my %cron = map {$_=>1} @cron;
+
+for (@cron) {
+ 0 and print STDERR "-$_\n" if $exp and !$src{$_} and /$exp/;
+ if ($exp and !$src{$_} and /$exp/) {
+ $diff=1 ;
+ next;
+ }
+ print "$_\n";
+}
+
+#
+# Add src
+#
+for (@src) {
+ $diff=2 if !$cron{$_} and print "$_\n";
+}
+
+exit $diff ? 0 : 1;
+
+#################################################################################
+#
+# END
+#
+#################################################################################
+exit 0;
+
+#################################################################################
+#
+# Functions
+#
+#################################################################################
+sub help {
+#------------------------------------------------------------------------------
+# Print help and exit
+#------------------------------------------------------------------------------
+
+ require 'Pod/Usage.pm' unless $INC{'Pod/Usage.pm'};
+
+ # Substitutions
+ sub pod_env {
+ my $v = '';
+ eval '$v = ref(\\'.$_[0].') eq "ARRAY" ? join(" ",'.$_[0].') : '.$_[0].'; return defined $v ? $v : qq|UNDEF|;';
+ return $v;
+ }
+
+ $main::_DATA_ =~ s/([@\$][A-Z_a-z\{\}]+)/pod_env($1)/eg;
+
+ my $in;
+ open($in,'<',\$main::_DATA_);
+
+ open(STDOUT,"|perl -pe 's/\.$$//g'".(($ENV{PAGER}||'') eq 'less' ? "|less -FRi" : ""));
+ my $opts = {
+ -input => $in,
+ -ouput => \*STDOUT,
+ -exitval => 'noexit',
+ -sections => [qw(SYNOPSIS DESCRIPTION OPTIONS)],
+ -verbose => ($Opt{'help'} ? 99 : 3),
+ };
+
+ Pod::Usage::pod2usage($opts);
+ close $in;
+ close STDOUT;
+
+ exit 0;
+}
+
+#------------------------------------------------------------------------------
+# Print version and exit
+#------------------------------------------------------------------------------
+sub version { print "$NAME: version [$VERSION]\n"; exit 0; }
+
+#------------------------------------------------------------------------------
+# Get options from pod
+#------------------------------------------------------------------------------
+sub get_options {
+
+ use Getopt::Long qw(:config no_ignore_case no_auto_abbrev);
+
+ my @Opt;
+
+ sub pod_opt {
+ local $_;
+ my $o = shift;
+ $o =~ s/(=.|[\+\-\!]$)//;
+ $o = join(", ",map{"-$_"} split(/[\|,:;]/,$o));
+ return "$o";
+ }
+
+ while (<DATA>) {
+ s/option\[([^\]]+)\]/push(@Opt,$1) and pod_opt($1)/eg;
+ $main::_DATA_ .= $_;
+ }
+
+ GetOptions($_[0],@Opt) || exit -1;
+
+ help() if $_[0]{'help'} or $_[0]{'man'};
+ version() if $_[0]{'version'};
+
+ $main::VERBOSE = $VERBOSE = $_[0]{'verbose'} if defined $_[0]{'verbose'};
+ $main::DEBUG = $DEBUG = $_[0]{'debug'} if defined $_[0]{'debug'};
+
+}
+
+__DATA__
+
+=head1 NAME
+
+$NAME - Script to do ...
+
+=head1 SYNOPSIS
+
+Quick usage!
+
+=over
+
+=item $NAME --verbose
+
+=item $NAME --help
+
+=back
+
+=head1 DESCRIPTION
+
+Description!
+
+=head1 OPTIONS
+
+ -option[verbose|v+] Verbose mode: increase the verbosity level.
+ -option[debug+] Debug mode: increase the verbosity level.
+ -option[version|V] Print version (default: $VERSION)
+ -option[help|h|?] Print a brief help message and exits.
+ -option[man] Print the manual page and exits.
+
+=cut
+
+=head1 EXAMPLES
+
+...
+
+=head1 REQUIRES
+
+Getopt::Std, Pod::Usage
+
+=head1 COPYRIGHT AND LICENSE
+
+Copyright (C) 2019 Nicolas Boisselier
+
+This program 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 3 of the License, or (at your option) any later version.
+
+See <http://www.gnu.org/licenses/>.
+
+=head1 SEE ALSO
+
+perl(1), http://perldoc.perl.org/perlpodstyle.html
+
+=head1 AUTHOR
+
+Nicolas Boisselier <nico@nbdom.net>
+
+=cut