/usr/bin/mimedefang-util is in mimedefang 2.73-2build1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 | #!perl -w
use strict;
use warnings;
use Getopt::Long;
use Pod::Usage;
use MIME::Parser;
use MIME::Words qw( decode_mimewords );
use File::Temp qw( tempdir );
=head1 NAME
mimedefang-util -- Utility script for message structure debugging
=head1 SYNOPSIS
# Print a "pretty" version of an input message
mimedefang-util --prettyprint < input.msg
# Print the message structure
mimedefang-util --structure < input.msg
# Parse and re-MIME the message
mimedefang-util --dump < input.msg
=head1 DESCRIPTION
This script provides some debug tools formerly provided as part of mimedefang.pl
=head1 OPTIONS
=over 4
=item B<--prettyprint>
Parses a mail message from standard input and reformats it in a "pretty" format
on standard output. All text/* parts are printed directly, and non-text parts
are described without printing their content.
=item B<--structure>
Parses a mail message from standard input, and outputs a description of the
MIME tree to standard output.
=item B<--dump>
Parses a mail message from standard input, and dumps the parsed message back
out again to standard output.
=item B<--help>
This help
=item B<--man>
Full manpage
=back
=head1 LICENSE AND COPYRIGHT
Copyright (C) 2010 Roaring Penguin Software Inc.
This program may be distributed under the terms of the GNU General
Public License, Version 2, or (at your option) any later version.
=cut
my ($prettyprint, $structure, $dump) = undef;
my %actions;
my $result = GetOptions(
'prettyprint' => sub { $actions{prettyprint} = 1; },
'structure' => sub { $actions{structure} = 1; },
'dump' => sub { $actions{dump} = 1; },
'help' => sub { pod2usage(-exitval => 0, -verbose => 1) },
'man' => sub { pod2usage(-exitval => 0, -verbose => 2) },
);
if( keys(%actions) > 1 ) {
pod2usage( -message => 'Only one of --prettyprint, --structure, or --dump may be specified' );
}
if( keys(%actions) < 1 ) {
pod2usage( -message => 'One of --prettyprint, --structure, or --dump must be specified' );
}
my $tmpdir = tempdir( CLEANUP => 1 );
my $parser = MIME::Parser->new();
my $filer = MIME::Parser::FileInto->new( $tmpdir );
$filer->ignore_filename(1);
$parser->filer( $filer);
$parser->extract_nested_messages(1);
$parser->extract_uuencode(1);
$parser->output_to_core(0);
$parser->tmp_to_core(0);
my $entity = $parser->parse(\*STDIN);
if (!$entity) {
die qq{Could not parse MIME: $!\n};
}
if( $actions{'dump'} ) {
$entity->print(\*STDOUT);
} elsif( $actions{'structure'} ) {
print_entity_structure( $entity, 0 );
} elsif( $actions{'prettyprint'} ) {
print $entity->stringify_header,
"\n",
pretty_print_mail( $entity, 8192 );
}
exit(0);
sub print_entity_structure
{
my ($in, $level) = @_;
my ($type) = $in->mime_type;
my @parts = $in->parts;
$type =~ tr/A-Z/a-z/;
my ($disposition) = $in->head->mime_attr("Content-Disposition");
my ($body) = $in->bodyhandle;
my $fname = $in->head->recommended_filename();
if($fname) {
$fname = decode_mimewords($fname);
} else {
$fname = '';
}
my ($extension) = "";
$extension = $1 if($fname =~ /(\.[^.]*)$/);
$disposition = "inline" unless defined($disposition);
print " " x $level;
if(!defined($body)) {
print "non-leaf: type=$type; fname=$fname; disp=$disposition\n";
map { print_entity_structure($_, $level + 1) } @parts;
} else {
print "leaf: type=$type; fname=$fname; disp=$disposition\n";
}
}
sub pretty_print_mail
{
my ($e, $size, $chunk, $depth) = @_;
$chunk = "" unless defined($chunk);
$depth = 0 unless defined($depth);
my (@parts) = $e->parts;
my ($type) = $e->mime_type;
my $fname = $entity->head->recommended_filename();
if($fname) {
$fname = decode_mimewords($fname);
} else {
$fname = '';
}
$fname = "; filename=$fname" if($fname ne "");
my ($spaces) = " " x $depth;
$chunk .= "\n$spaces" . "[Part: ${type}${fname}]\n\n";
if($#parts >= 0) {
my ($part);
foreach $part (@parts) {
$chunk = pretty_print_mail($part, $size, $chunk, $depth + 1);
last if(length($chunk) >= $size);
}
} else {
return $chunk unless ($type =~ m+^text/+);
my ($body) = $e->bodyhandle;
return $chunk unless (defined($body));
my ($path) = $body->path;
return $chunk unless (defined($path));
return $chunk unless (open(IN, "<$path"));
while (<IN>) {
$chunk .= $_;
last if(length($chunk) >= $size);
}
close(IN);
}
return $chunk;
}
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