This file is indexed.

/usr/bin/run-mailcap is in mime-support 3.54ubuntu1.1.

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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
#! /usr/bin/perl
###############################################################################
#
#  Run-Mailcap:  Run a program specified in the mailcap file based on a mime
#  type.
#
#  Written by Brian White <bcwhite@pobox.com>
#  This file has been placed in the public domain (the only true "free").
#
###############################################################################

use File::Spec;

$debug=($ENV{RUN_MAILCAP_DEBUG} || 0);
$norun=0;
$nopager=0;
$etcmimetyp="/etc/mime.types";
$shrmimetyp="/usr/share/etc/mime.types";
$locmimetyp="/usr/local/etc/mime.types";
$usrmimetyp="$ENV{HOME}/.mime.types";
$xtermprgrm="/usr/bin/x-terminal-emulator"; # xterm?
$defmimetyp="application/octet-stream";
$quotedsemi=chr(255);
$quotedprct=chr(254);
$retcode=0;


%patterntypes =
(
 '(^|/)crontab[^/]+$'                           => 'text/x-crontab',            #'
 '/man\d*/'                                     => 'application/x-troff-man',   #'
 '\.\d[^\.]*$'                                  => 'application/x-troff-man',   #'
);



sub Usage {
    my($error) = @_;
    print STDERR $error,"\n\n" if $error;

    print STDERR "Use: $0 <--action=VAL> [--debug] [MIME-TYPE:[ENCODING:]]FILE [...]\n\n";
    print STDERR "Options:\n";
    print STDERR "  action        specify what action to do on these files (default=view)\n";
    print STDERR "  debug         be verbose about what's going on\n";
    print STDERR "  nopager       ignore any \"copiousoutput\" directives and never use a \"pager\"\n";
    print STDERR "  norun         just print but don't execute the command (useful with --debug)\n";
    print STDERR "\n";
    print STDERR "Mime-Type:\n";
    print STDERR "  any standard mime type designation in the form <class>/<subtype> -- if\n";
    print STDERR "  not specified, it will be determined from the filename extension\n\n";
    print STDERR "Encoding:\n";
    print STDERR "  how the file (and type) has been encoded (only \"gzip\", \"bzip\", \"bzip2\"\n";
    print STDERR "  and \"compress\" are supported) -- if not specified, it will be determined\n";
    print STDERR "  from the filename extension\n\n";

    exit ($error ? 1 : 0);
}



sub EncodingForFile {
    my($file) = @_;
    my $encoding;

    if ($file =~ m/\.gz$/)  { $encoding = "gzip";       }
    if ($file =~ m/\.bz$/)  { $encoding = "bzip";       }
    if ($file =~ m/\.bz2$/) { $encoding = "bzip2";      }
    if ($file =~ m/\.Z$/)   { $encoding = "compress";   }

    print STDERR " - file \"$file\" has encoding \"$encoding\"\n" if $debug && $encoding;

    return $encoding;
}



sub ReadMimetypes {
    my($file) = @_;

    return unless -r $file;

    print STDERR " - Reading mime.types file \"$file\"...\n" if $debug;
    open(MIMETYPES,"<$file") || die "Error: could not read \"$file\" -- $!\n";
    while (<MIMETYPES>) {
        chomp;
        s/\#.*$//;
        next if (m/^\s*$/);

        $_=lc($_);
        my($type,@exts) = split;

        foreach (@exts) {
            $mimetypes{$_} = $type unless exists $mimetypes{$_};
        }
    }
    close MIMETYPES;
}



sub ReadMailcap {
    my($file) = @_;
    my $line = "";

    return unless -r $file;

    print STDERR " - Reading mailcap file \"$file\"...\n" if $debug;
    open(MAILCAP,"<$file") || die "Error: could not read \"$file\" -- $!\n";
    while (<MAILCAP>) {
        chomp;
        s/^\s+// if $line;
        $line .= $_;
        next unless $line;
        if ($line =~ m/^\s*\#/) {
            $line = "";
            next;
        }
        if ($line =~ m/\\$/) {
            $line =~ s/\\$//;
        } else {
            $line =~ s/\\;/$quotedsemi/go;
            $line =~ s/\\%/$quotedprct/go;
            push @mailcap,$line;
            $line = "";
        }
    }
    close MAILCAP;
}



sub TempFile {
    my($template) = @_;
    my($cmd,$head,$tail,$tmpfile);
    $template = "" unless (defined $template);

    ($head,$tail) = split(/%s/,$template,2);

#   $tmpfile = POSIX::tmpnam($name);
#   unlink($tmpfile);

    $cmd  = "tempfile --mode=600";
    $cmd .= " --prefix $head" if $head;
    $cmd .= " --suffix $tail" if $tail;

    $tmpfile = `$cmd`;
    chomp($tmpfile);

#   $tmpfile = $ENV{TMPDIR};
#   $tmpfile = "/tmp" unless $tmpfile;
#   $tmpfile.= "/$name";
#   unlink($tmpfile);

    return $tmpfile;
}



sub SaveStdin {
    my($match) = @_;
    my($tmpfile,$amt,$buf);

    $tmpfile = $1 if ($match =~ m/nametemplate=(.*?)\s*($|;)/);
    $tmpfile = TempFile($tmpfile);
    open(TMPFILE,">$tmpfile") || die "Error: could not write \"$tmpfile\" -- $!\n";
    do {
        $amt = read(STDIN,$buf,102400);
        print TMPFILE $buf if $amt;
    } while ($amt != 0);
    close(TMPFILE);

    return $tmpfile;
}



sub DecodeFile {
    my($efile,$encoding,$action) = @_;
    my($file,$res);

    $file = $efile;
    $file =~ s!^.*/!!;          # remove leading directories
    $file =~ s!\.[^\.]*$!!;     # remove encoding extension
    $file =~ s!^\.?[^\.]*!%s!;  # replace name with placeholder
    $file = undef if ($efile eq '-');
    my $tmpfile = TempFile($file);

    print STDERR " - decoding \"$efile\" as \"$tmpfile\"\n" if $debug;

#   unlink($tmpfile); # should still be acceptable for "compose" output even if exists
    return $tmpfile if (($efile ne '-' && ! -e $efile) || $action eq 'compose');

    if ($encoding eq "gzip") {
        if ($efile eq '-') {
            $res = system "gzip -d >\Q$tmpfile\E";
        } else {
            $res = system "gzip -dc \Q$efile\E >\Q$tmpfile\E";
        }
    } elsif ($encoding eq "bzip") {
        if ($efile eq '-') {
            $res = system "bzip -d >\Q$tmpfile\E";
        } else {
            $res = system "bzip -dc <\Q$efile\E >\Q$tmpfile\E";
        }
    } elsif ($encoding eq "bzip2") {
        if ($efile eq '-') {
            $res = system "bzip2 -d >\Q$tmpfile\E";
        } else {
            $res = system "bzip2 -dc <\Q$efile\E >\Q$tmpfile\E";
        }
    } elsif ($encoding eq "compress") {
        if ($efile eq '-') {
            $res = system "uncompress >\Q$tmpfile\E";
        } else {
            $res = system "uncompress <\Q$efile\E >\Q$tmpfile\E";
        }
    } else {
        die "Fatal: unknown encoding \"$encoding\" at";
    }

    $res = int($res/256);
    if ($res != 0) {
        print STDERR "Error: could not decode \"$efile\" -- $!\n";
        $retcode = 2 if ($retcode < 2);
        unlink($tmpfile);
        return;
    }

#   chmod 0600,$tmpfile; # done already by TempFile
    return $tmpfile;
}



sub EncodeFile {
    my($dfile,$efile,$encoding) = @_;
    my($res);

    print STDERR " - encoding \"$dfile\" as \"$efile\"\n";

    if ($encoding eq "gzip") {
        if ($efile eq '-') {
            $res = system "gzip -c \Q$dfile\E";
        } else {
            $res = system "gzip -c \Q$dfile\E >\Q$efile\E";
        }
    } elsif ($encoding eq "compress") {
        if ($efile eq '-') {
            $res = system "compress <\Q$dfile\E";
        } else {
            $res = system "compress <\Q$dfile\E >\Q$efile\E";
        }
    } else {
        die "Fatal: unknown encoding \"$encoding\" at";
    }

    $res = int($res/256);
    if ($res != 0) {
        print STDERR "Error: could not encode \"$efile\" (left as \"$dfile\")\n";
        $retcode = 2 if ($retcode < 2);
        return;
    }

    return $dfile;
}



sub ExtensionMimetype {
    my($ext) = @_;
    my($typ);

    unless ($donemimetypes) {
        ReadMimetypes($usrmimetyp);
        ReadMimetypes($locmimetyp);
        ReadMimetypes($shrmimetyp);
        ReadMimetypes($etcmimetyp);
        $donemimetypes = 1;
    }

    $typ = $mimetypes{lc($ext)};

    print STDERR " - extension \"$ext\" maps to mime-type \"$typ\"\n" if $debug;
    return $typ;
}



sub PatternMimetype {
    my($file) = @_;
    my($key,$val);

    while (($key,$val) = each %patterntypes) {
        if ($file =~ m!$key!i) {
            print STDERR " - file \"$file\" maps to mime-type \"$val\"\n" if $debug;
            return $val;
        }
    }

    print STDERR " - file \"$file\" does not conform to any known pattern\n" if $debug;
    return;
}



sub FileMimetype {
    my($file) = @_;
    my($ext)  = ($file =~ m!\.([^/\.]+)$!);

    my $type;

    $type = ExtensionMimetype($ext) if $ext;
    $type = PatternMimetype($file) unless $type;

    return $type;
}



@files = ();
foreach (@ARGV) {
    print STDERR " - parsing parameter \"$_\"\n" if $debug;
    if (m!^(-h|--help)$!) {
        Usage();
        exit(0);
    } elsif (m!^--(.*?)=(.*)$!) {
        print STDERR "Warning: definition of \"$1=$2\" overrides value \"${$1}\"\n" if ($ {$1} && $ {$1} != $2);
        $ {$1}=$2;
    } elsif (m!^--(.*?)$!) {
        print STDERR "Warning: definition of \"$1=$2\" overrides value \"${$1}\"\n" if ($ {$1} && $ {$1} != 1);
        $ {$1}=1;
    } elsif (m!^[^/:]+/[^/:]+:[^/:]+:!) {
        push @files,$_;
    } elsif (m!^([^/:]+/[^/:]+):(.*)! && ! -e $_) {
        my $file = $_;
        my $type = $1;
        my $file = $2;
        my $code = EncodingForFile($file);
        push @files,"${type}:${code}:${file}";
        print STDERR " - file \"$file\" does not exist -- assuming mime-type specification of \"${type}\"\n" if $debug;
    } else {
        my $file = $_;
        my $code = EncodingForFile($file);
        my $type;
        if ($code) {
            my $efile = $file;
            $efile =~ s/\.[^\.]+$//;
            $type = FileMimetype($efile);
        } else {
            $type = FileMimetype($file);
        }
        if ($type) {
            push @files,"${type}:${code}:${file}";
        } else {
            print STDERR "Warning: unknown mime-type for \"$file\" -- using \"$defmimetyp\"\n";
            push @files,"${defmimetyp}:${code}:${file}";
        }
    }
}

# Pass --debug to sub-calls to this program.
$ENV{RUN_MAILCAP_DEBUG} = 1 if $debug;

unless ($action) {
       if ($0 =~ m!(^|/)(mime-)?view$!)     { $action="view";   }
    elsif ($0 =~ m!(^|/)(mime-)?see$!)      { $action="view";   }
    elsif ($0 =~ m!(^|/)(mime-)?cat$!)      { $action="cat";    }
    elsif ($0 =~ m!(^|/)(mime-)?edit$!)     { $action="edit";   }
    elsif ($0 =~ m!(^|/)(mime-)?change$!)   { $action="edit";   }
    elsif ($0 =~ m!(^|/)(mime-)?compose$!)  { $action="compose";}
    elsif ($0 =~ m!(^|/)(mime-)?print$!)    { $action="print";  }
    elsif ($0 =~ m!(^|/)(mime-)?create$!)   { $action="compose";}
    else                                    { $action="view";   }
}


$mailcaps = $ENV{MAILCAPS};
$mailcaps = "$ENV{HOME}/.mailcap:/etc/mailcap:/usr/local/etc/mailcap:/usr/share/etc/mailcap:/usr/etc/mailcap" unless $mailcaps;
foreach (split(/:/,$mailcaps)) {
    ReadMailcap($_);
}

foreach (@files) {
    my($type,$code,$file) = m/^(.*?):(.*?):(.*)$/;
    print STDERR "Processing file \"$file\" of type \"$type\" (encoding=",$code?$code:"none",")...\n" if $debug;

    if ($file ne '-') {
        if ($action eq 'compose' || $action eq 'edit') {
            if (-e $file) {
                if (! -w $file) {
                    print STDERR "Error: no write permission for file \"$file\"\n";
                    $retcode = 2 if ($retcode < 2);
                    next;
                }
            } else {
                if (open(TEST,">$file")) {
                    close(TEST);
                    unlink($file);
                } else {
                    print STDERR "Error: no write permission for file \"$file\"\n";
                    $retcode = 2 if ($retcode < 2);
                    next;
                }
            }
        } else {
            if (! -e $file) {
                print STDERR "Error: no such file \"$file\"\n";
                $retcode = 2 if ($retcode < 2);
                next;
            }
            if (! -r $file) {
                print STDERR "Error: no read permission for file \"$file\"\n";
                $retcode = 2 if ($retcode < 2);
                next;
            }
        }
    }

    my(@matches,$entry,$res,$efile);
    if ($code) {
        $efile = $file;
        $file  = DecodeFile($efile,$code,$action);
        next unless $file;
    }

    foreach $entry (@mailcap) {
        $entry =~ m/^(.*?)\s*;/;
        $_ = "\Q$1\E"; s/\\\*/\.\*/g;
        push @matches,$entry if ($type =~ m!^$_$!i);
    }
    @matches = grep(/\Q$action\E=/,@matches) unless ($action eq "view" || $action eq "cat");

    my $done=0;
    my $fail=0;
    foreach $match (@matches) {
        my $comm;
        print STDERR " - checking mailcap entry \"$match\"\n" if $debug;
        if ($action eq "view" || $action eq "cat") {
            ($comm) = ($match =~ m/^.*?;\s*(.*?)\s*($|;)/);
        } else {
            ($comm) = ($match =~ m/\Q$action\E=(.*?)\s*($|;)/);
        }
        next if (!$comm || $comm =~ m!(^|/)false$!i);
        print STDERR " - program to execute: $comm\n" if $debug;

	if ($action eq 'cat' && $match !~ m/;\s*copiousoutput\s*($|;)/) {
	    print STDERR " - \"copiousoutput\" is required for \"cat\" action\n" if $debug;
	    $fail++;
	    next;
	}

        my($tmpfile,$tmplink);
        if ($action ne 'print' && $match =~ m/;\s*needsterminal\s*($|;)/ && ! -t STDOUT) {
            if ($ENV{DISPLAY}) {
                $comm = "$xtermprgrm -T '$file ($type)' -e $0 --action=$action '${type}:%s'";
            } else {
                print STDERR " - no terminal available for rule (needsterminal)\n" if $debug;
                $fail++;
                next;
            }
        } elsif ($action eq 'view' && !$nopager && $match =~ m/;\s*copiousoutput\s*($|;)/ && $type ne 'text/plain') {
            $comm .= " | $0 --action=$action text/plain:-";
        }

        if ($match =~ m/;\s*test=(.*?)\s*($|;)/) {
            my $test;
            print STDERR " - running test: $1 " if $debug;
            $test   = system "$1 >/dev/null 2>&1";
            $test >>= 8;
            print STDERR " (result=$test=",($test!=0?"false":"true"),")\n" if $debug;
            if ($test) {
                $fail++;
                next;
            }
        }

        if ($file ne "-") {
            # Resolve file name to an absolute path
            $file = File::Spec->rel2abs($file);
            if ($file =~ m![^ a-z0-9,.:/@%^+=_-]!i) {
                $match =~ m/nametemplate=(.*?)\s*($|;)/;
                my $prefix = $1;
                my $linked = 0;
                while (!$linked) {
                    $tmplink = TempFile($prefix);
                    unlink($tmplink);
                    $linked = symlink($file,$tmplink);
                }
                $file = $tmplink;
                print STDERR " - filename contains shell meta-characters; aliased to '$tmplink'\n" if $debug;
            }
            if ($comm =~ m/[^%]%s/) {
                   $comm =~ s/([^%])%s/$1$file/g;
            } else {
                if ($comm =~ m/\|/) {
                    $comm =~ s/\|/<\Q$file\E \|/;
                } else {
                    $comm .= " <\Q$file\E";
                }
                if ($action eq 'edit' || $action eq 'compose') {
                    $comm .= " >\Q$file\E";
                }
            }
        } else {
            if ($comm =~ m/[^%]%s/) {
                $tmpfile = SaveStdin($match);
                $comm =~ s/([^%])%s/$1$tmpfile/g;
            } else {
                # no name means same as "-"... read from stdin
            }
        }

        $comm =~ s!([^%])%t!$1$type!g;
        $comm =~ s!([^%])%F!$1!g;
        $comm =~ s!%{(.*?)}!$_="'$ENV{$1}'";s/\`//g;s/\'\'//g;$_!ge;
        $comm =~ s!\\(.)!$1!g;
        $comm =~ s!\'\'!\'!g;
        $comm =~ s!$quotedsemi!;!go;
        $comm =~ s!$quotedprct!%!go;

        print STDERR " - executing: $comm\n" if $debug;
	if ($norun) {
	    print $comm,"\n";
	    $res = 0;
	} else {
	    $res = system $comm;
	    $res = int($res/256);
	}
        if ($res != 0) {
            print STDERR "Warning: program returned non-zero exit code \#$res\n";
            $retcode = $res;
        }
        $done=1;
        unlink $tmpfile if $tmpfile;
        unlink $tmplink if $tmplink;
        last;
    }

    if (!$done) {
        if ($fail) {
            print STDERR "Error: no \"$action\" rule for type \"$type\" passed its test case\n";
            print STDERR "       (for more information, add \"--debug=1\" on the command line)\n";
            $retcode = 3 if ($retcode < 3);
        } else {
            print STDERR "Error: no \"$action\" mailcap rules found for type \"$type\"\n";
            $retcode = 3 if ($retcode < 3);
        }
        unlink $file if $code;
        $retcode = 1 unless $retcode;
        next;
    }

    if ($code) {
        if ($action eq 'edit' || $action eq 'compose') {
            my $file = EncodeFile($file,$efile,$code);
            unlink $file if $file;
        } else {
            unlink $file;
        }
    }
}

exit($retcode);