summaryrefslogtreecommitdiffstats
path: root/main.cc
blob: 961c1e1f72394ff9d69d1e6a129a46afb73ddce0 (plain)
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
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
/*  Zutils - A file format detector for compressed files
    Copyright (C) 2009 Antonio Diaz Diaz.

    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.

    This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
*/
/*
    Return values: 0 for a normal exit, 1 for environmental problems
    (file not found, invalid flags, I/O errors, etc), 2 to indicate a
    corrupt or invalid input file, 3 for an internal consistency error
    (eg, bug) which caused zutils to panic.
*/

#define _FILE_OFFSET_BITS 64

#include <algorithm>
#include <cerrno>
#include <climits>
#include <csignal>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <string>
#include <vector>
#include <fcntl.h>
#include <stdint.h>
#include <unistd.h>
#include <utime.h>
#include <sys/stat.h>
#include <sys/time.h>

#include "arg_parser.h"

#ifndef LLONG_MAX
#define LLONG_MAX  0x7FFFFFFFFFFFFFFFLL
#endif
#ifndef LLONG_MIN
#define LLONG_MIN  (-LLONG_MAX - 1LL)
#endif
#ifndef ULLONG_MAX
#define ULLONG_MAX 0xFFFFFFFFFFFFFFFFULL
#endif


namespace {

const char * invocation_name = 0;
const char * const Program_name    = "Zutils";
const char * const program_name    = "zutils";
const char * const program_year    = "2009";

struct { const char * from; const char * to; } const known_extensions[] = {
  { ".zf",  ""     },
  { 0,      0      } };

enum Mode { m_compress = 0, m_decompress, m_test };

std::string output_filename;
int outhandle = -1;
int verbosity = 0;
bool delete_output_on_interrupt = false;


class Pretty_print
  {
  const char * const stdin_name;
  const unsigned int stdin_name_len;
  unsigned int longest_name;
  std::string name_;
  mutable bool first_post;

public:
  Pretty_print( const std::vector< std::string > & filenames )
    : stdin_name( "(stdin)" ), stdin_name_len( std::strlen( stdin_name ) ),
      longest_name( 0 ), first_post( false )
    {
    for( unsigned int i = 0; i < filenames.size(); ++i )
      {
      const std::string & s = filenames[i];
      const unsigned int len = ( ( s == "-" ) ? stdin_name_len : s.size() );
      if( len > longest_name ) longest_name = len;
      }
    if( longest_name == 0 ) longest_name = stdin_name_len;
    }

  void set_name( const std::string & filename )
    {
    if( filename.size() && filename != "-" ) name_ = filename;
    else name_ = stdin_name;
    first_post = true;
    }

  void reset() const throw() { if( name_.size() ) first_post = true; }
  const char * name() const throw() { return name_.c_str(); }
  void operator()( const char * const msg = 0 ) const throw();
  };


void Pretty_print::operator()( const char * const msg ) const throw()
  {
  if( verbosity >= 0 )
    {
    if( first_post )
      {
      first_post = false;
      std::fprintf( stderr, "  %s: ", name_.c_str() );
      for( unsigned int i = 0; i < longest_name - name_.size(); ++i )
        std::fprintf( stderr, " " );
      if( !msg ) std::fflush( stderr );
      }
    if( msg ) std::fprintf( stderr, "%s.\n", msg );
    }
  }


void show_help() throw()
  {
  std::printf( "%s - A file format detector for compressed files.\n", Program_name );
  std::printf( "\nUsage: %s [options] [files]\n", invocation_name );
  std::printf( "\nOptions:\n" );
  std::printf( "  -h, --help                 display this help and exit\n" );
  std::printf( "  -V, --version              output version information and exit\n" );
//  std::printf( "  -c, --stdout               send output to standard output\n" );
//  std::printf( "  -d, --decompress           decompress\n" );
//  std::printf( "  -f, --force                overwrite existing output files\n" );
//  std::printf( "  -k, --keep                 keep (don't delete) input files\n" );
//  std::printf( "  -o, --output=<file>        if reading stdin, place the output into <file>\n" );
  std::printf( "  -q, --quiet                suppress all messages\n" );
  std::printf( "  -t, --test                 test compressed file type\n" );
  std::printf( "  -v, --verbose              be verbose (a 2nd -v gives more)\n" );
  std::printf( "\nReport bugs to zutils-bug@nongnu.org\n" );
  std::printf( "Zutils home page: http://www.nongnu.org/zutils/zutils.html\n" );
  }


void show_version() throw()
  {
  std::printf( "%s %s\n", Program_name, PROGVERSION );
  std::printf( "Copyright (C) %s Antonio Diaz Diaz.\n", program_year );
  std::printf( "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n" );
  std::printf( "This is free software: you are free to change and redistribute it.\n" );
  std::printf( "There is NO WARRANTY, to the extent permitted by law.\n" );
  }


void show_error( const char * msg, const int errcode = 0, const bool help = false ) throw()
  {
  if( verbosity >= 0 )
    {
    if( msg && msg[0] != 0 )
      {
      std::fprintf( stderr, "%s: %s", program_name, msg );
      if( errcode > 0 ) std::fprintf( stderr, ": %s", std::strerror( errcode ) );
      std::fprintf( stderr, "\n" );
      }
    if( help && invocation_name && invocation_name[0] != 0 )
      std::fprintf( stderr, "Try `%s --help' for more information.\n", invocation_name );
    }
  }


void internal_error( const char * msg )
  {
  std::string s( "internal error: " ); s += msg;
  show_error( s.c_str() );
  std::exit( 3 );
  }


const char * format_num( long long num, long long limit = 9999,
                         const int set_prefix = 0 ) throw()
  {
  const char * const si_prefix[8] =
    { "k", "M", "G", "T", "P", "E", "Z", "Y" };
  const char * const binary_prefix[8] =
    { "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi" };
  static bool si = false;
  static char buf[16];

  if( set_prefix ) si = ( set_prefix > 0 );
  const int factor = ( si ) ? 1000 : 1024;
  const char * const *prefix = ( si ) ? si_prefix : binary_prefix;
  const char *p = "";
  limit = std::max( 999LL, std::min( 999999LL, limit ) );

  for( int i = 0; i < 8 && ( llabs( num ) > limit ||
       ( llabs( num ) >= factor && num % factor == 0 ) ); ++i )
    { num /= factor; p = prefix[i]; }
  snprintf( buf, sizeof buf, "%lld %s", num, p );
  return buf;
  }


long long getnum( const char * ptr, const int bs,
                  const long long llimit = LLONG_MIN + 1,
                  const long long ulimit = LLONG_MAX ) throw()
  {
  errno = 0;
  char *tail;
  long long result = strtoll( ptr, &tail, 0 );
  if( tail == ptr )
    {
    show_error( "bad or missing numerical argument", 0, true );
    std::exit( 1 );
    }

  if( !errno && tail[0] )
    {
    int factor = ( tail[1] == 'i' ) ? 1024 : 1000;
    int exponent = 0;
    bool bad_multiplier = false;
    switch( tail[0] )
      {
      case ' ': break;
      case 'b': if( bs > 0 ) { factor = bs; exponent = 1; }
                else bad_multiplier = true;
                break;
      case 'Y': exponent = 8; break;
      case 'Z': exponent = 7; break;
      case 'E': exponent = 6; break;
      case 'P': exponent = 5; break;
      case 'T': exponent = 4; break;
      case 'G': exponent = 3; break;
      case 'M': exponent = 2; break;
      case 'K': if( factor == 1024 ) exponent = 1; else bad_multiplier = true;
                break;
      case 'k': if( factor == 1000 ) exponent = 1; else bad_multiplier = true;
                break;
      default: bad_multiplier = true;
      }
    if( bad_multiplier )
      {
      show_error( "bad multiplier in numerical argument", 0, true );
      std::exit( 1 );
      }
    for( int i = 0; i < exponent; ++i )
      {
      if( LLONG_MAX / factor >= llabs( result ) ) result *= factor;
      else { errno = ERANGE; break; }
      }
    }
  if( !errno && ( result < llimit || result > ulimit ) ) errno = ERANGE;
  if( errno )
    {
    show_error( "numerical argument out of limits" );
    std::exit( 1 );
    }
  return result;
  }


int extension_index( const std::string & name ) throw()
  {
  for( int i = 0; known_extensions[i].from; ++i )
    {
    const std::string ext( known_extensions[i].from );
    if( name.size() > ext.size() &&
        name.compare( name.size() - ext.size(), ext.size(), ext ) == 0 )
      return i;
    }
  return -1;
  }


int open_instream( const std::string & name, struct stat * in_statsp,
                   const Mode program_mode, const int eindex,
                   const bool force, const bool to_stdout ) throw()
  {
  int inhandle = -1;
  if( program_mode == m_compress && !force && eindex >= 0 )
    {
    if( verbosity >= 0 )
      std::fprintf( stderr, "%s: input file `%s' already has `%s' suffix.\n",
                    program_name, name.c_str(),
                    known_extensions[eindex].from );
    }
  else
    {
    inhandle = open( name.c_str(), O_RDONLY );
    if( inhandle < 0 )
      {
      if( verbosity >= 0 )
        std::fprintf( stderr, "%s: Can't open input file `%s': %s.\n",
                      program_name, name.c_str(), std::strerror( errno ) );
      }
    else
      {
      const int i = fstat( inhandle, in_statsp );
      const mode_t & mode = in_statsp->st_mode;
      if( i < 0 || !( S_ISREG( mode ) || ( to_stdout &&
                      ( S_ISFIFO( mode ) || S_ISSOCK( mode ) ||
                        S_ISBLK( mode ) || S_ISCHR( mode ) ) ) ) )
        {
        if( verbosity >= 0 )
          std::fprintf( stderr, "%s: input file `%s' is not a regular file%s.\n",
                        program_name, name.c_str(),
                        to_stdout ? "" : " and `--stdout' was not specified" );
        close( inhandle );
        inhandle = -1;
        }
      }
    }
  return inhandle;
  }


void set_c_outname( const std::string & name ) throw()
  {
  output_filename = name;
  output_filename += known_extensions[0].from;
  }


void set_d_outname( const std::string & name, const int i ) throw()
  {
  if( i >= 0 )
    {
    const std::string from( known_extensions[i].from );
    if( name.size() > from.size() )
      {
      output_filename.assign( name, 0, name.size() - from.size() );
      output_filename += known_extensions[i].to;
      return;
      }
    }
  output_filename = name; output_filename += ".out";
  if( verbosity >= 0 )
    std::fprintf( stderr, "%s: can't guess original name for `%s' -- using `%s'.\n",
                  program_name, name.c_str(), output_filename.c_str() );
  }


bool open_outstream( const bool /*force*/ ) throw()
  {
/*  if( force )
    outhandle = open( output_filename.c_str(), O_CREAT | O_TRUNC | O_WRONLY,
                      S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH );
  else outhandle = open( output_filename.c_str(), O_CREAT | O_EXCL | O_WRONLY,
                         S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH );
  if( outhandle < 0 )
    {
    if( errno == EEXIST ) outhandle = -2; else outhandle = -1;
    if( verbosity >= 0 )
      {
      if( outhandle == -2 )
        std::fprintf( stderr, "%s: Output file %s already exists, skipping.\n",
                      program_name, output_filename.c_str() );
      else
        std::fprintf( stderr, "%s: Can't create output file `%s': %s.\n",
                      program_name, output_filename.c_str(), std::strerror( errno ) );
      }
    }*/
  return ( outhandle >= 0 );
  }


bool check_tty( const int inhandle, const Mode program_mode ) throw()
  {
  if( program_mode == m_compress && isatty( outhandle ) )
    {
    show_error( "I won't write compressed data to a terminal.", 0, true );
    return false;
    }
  if( ( program_mode == m_decompress || program_mode == m_test ) &&
      isatty( inhandle ) )
    {
    show_error( "I won't read compressed data from a terminal.", 0, true );
    return false;
    }
  return true;
  }


void cleanup_and_fail( const int retval ) throw()
  {
  if( delete_output_on_interrupt )
    {
    if( verbosity >= 0 )
      std::fprintf( stderr, "%s: Deleting output file `%s', if it exists.\n",
               program_name, output_filename.c_str() );
    if( outhandle >= 0 ) { close( outhandle ); outhandle = -1; }
    if( std::remove( output_filename.c_str() ) != 0 )
      show_error( "WARNING: deletion of output file (apparently) failed." );
    }
  std::exit( retval );
  }


     // Set permissions, owner and times.
void close_and_set_permissions( const struct stat * in_statsp, int * retvalp )
  {
  int tmp = 0;
  if( in_statsp )
    {
    if( fchmod( outhandle, in_statsp->st_mode ) != 0 ) tmp = 1;
    if( !tmp ) (void)fchown( outhandle, in_statsp->st_uid, in_statsp->st_gid );
    // fchown will in many cases return with EPERM, which can be safely ignored.
    }
  if( close( outhandle ) == 0 ) outhandle = -1;
  else cleanup_and_fail( 1 );
  delete_output_on_interrupt = false;
  if( !in_statsp ) return;
  if( !tmp )
    {
    struct utimbuf t;
    t.actime = in_statsp->st_atime;
    t.modtime = in_statsp->st_mtime;
    tmp = utime( output_filename.c_str(), &t );
    }
  if( tmp )
    {
    if( tmp > *retvalp ) *retvalp = tmp;
    show_error( "I can't change output file attributes." );
    cleanup_and_fail( *retvalp );
    }
  }


// Returns the number of bytes really read.
// If (returned value < size) and (errno == 0), means EOF was reached.
//
int readblock( const int fd, char * buf, const int size ) throw()
  {
  int rest = size;
  errno = 0;
  while( rest > 0 )
    {
    errno = 0;
    const int n = read( fd, buf + size - rest, rest );
    if( n > 0 ) rest -= n;
    else if( n == 0 ) break;
    else if( errno != EINTR && errno != EAGAIN ) break;
    }
  return ( rest > 0 ) ? size - rest : size;
  }


// Returns the number of bytes really written.
// If (returned value < size), it is always an error.
//
int writeblock( const int fd, const char * buf, const int size ) throw()
  {
  int rest = size;
  errno = 0;
  while( rest > 0 )
    {
    errno = 0;
    const int n = write( fd, buf + size - rest, rest );
    if( n > 0 ) rest -= n;
    else if( errno && errno != EINTR && errno != EAGAIN ) break;
    }
  return ( rest > 0 ) ? size - rest : size;
  }

/*
int compress( const int inhandle, const Pretty_print & pp,
              const struct stat * in_statsp, int * retvalp )
  {
  long long in_size = 0, out_size = 0;
  if( verbosity >= 1 )
    {
    pp();
    if( in_size <= 0 || out_size <= 0 )
      std::fprintf( stderr, "no data compressed.\n" );
    else
      std::fprintf( stderr, "%6.3f:1, %6.3f bits/byte, "
                            "%5.2f%% saved, %lld in, %lld out.\n",
                    (double)in_size / out_size,
                    ( 8.0 * out_size ) / in_size,
                    100.0 * ( 1.0 - ( (double)out_size / in_size ) ),
                    in_size, out_size );
    }
  return 0;
  }


int decompress( const int inhandle, const Pretty_print & pp )
  {
  if( verbosity >= 1 )
    std::fprintf( stderr, "done\n" );
  return 0;
  }
*/

int test_type( const int inhandle, const Pretty_print & pp )
  {
  unsigned char buf[5];
  const char * msg = 0;
  const int size = readblock( inhandle, (char *)buf, sizeof buf );
  if( size == (int)sizeof buf )
    {
    if( buf[0] == 0x1F && buf[1] == 0x8B )
      msg = "gzip";
    else if( buf[0] == 'B' && buf[1] == 'Z' && buf[2] == 'h' )
      msg = "bzip2";
    else if( buf[0] == 'L' && buf[1] == 'Z' && buf[2] == 'I' && buf[3] == 'P' )
      msg = "lzip";
    else if( buf[1] == '7' && buf[2] == 'z' && buf[3] == 'X' && buf[4] == 'Z' )
      msg = "xz";
    }
  const int retval = ( msg ? 0 : 1 );
  if( verbosity >= 0 )
    {
    if( verbosity >= 1 ) pp();
    if( !msg ) msg = "unknown";
    std::printf( "%s\n", msg );
    }
  return retval;
  }


extern "C" void signal_handler( int ) throw()
  {
  show_error( "Control-C or similar caught, quitting." );
  cleanup_and_fail( 0 );
  }


void set_signals() throw()
  {
  signal( SIGHUP, signal_handler );
  signal( SIGINT, signal_handler );
  signal( SIGTERM, signal_handler );
  }

} // end namespace


int main( const int argc, const char * argv[] )
  {
  int inhandle = -1;
  Mode program_mode = m_compress;
  bool force = false;
  bool keep_input_files = false;
  bool to_stdout = false;
  std::string input_filename;
  std::string default_output_filename;
  std::vector< std::string > filenames;
  invocation_name = argv[0];

  const Arg_parser::Option options[] =
    {
    { 'c', "stdout",          Arg_parser::no  },
    { 'd', "decompress",      Arg_parser::no  },
    { 'f', "force",           Arg_parser::no  },
    { 'h', "help",            Arg_parser::no  },
    { 'k', "keep",            Arg_parser::no  },
    { 'o', "output",          Arg_parser::yes },
    { 'q', "quiet",           Arg_parser::no  },
    { 't', "test",            Arg_parser::no  },
    { 'v', "verbose",         Arg_parser::no  },
    { 'V', "version",         Arg_parser::no  },
    {  0 ,  0,                Arg_parser::no  } };

  Arg_parser parser( argc, argv, options );
  if( parser.error().size() )				// bad option
    { show_error( parser.error().c_str(), 0, true ); return 1; }

  int argind = 0;
  for( ; argind < parser.arguments(); ++argind )
    {
    const int code = parser.code( argind );
    if( !code ) break;					// no more options
    const char * arg = parser.argument( argind ).c_str();
    switch( code )
      {
      case 'c': to_stdout = true; break;
      case 'd': program_mode = m_decompress; break;
      case 'f': force = true; break;
      case 'h': show_help(); return 0;
      case 'k': keep_input_files = true; break;
      case 'o': default_output_filename = arg; break;
      case 'q': verbosity = -1; break;
      case 't': program_mode = m_test; break;
      case 'v': if( verbosity < 4 ) ++verbosity; break;
      case 'V': show_version(); return 0;
      default : internal_error( "uncaught option" );
      }
    }

  bool filenames_given = false;
  for( ; argind < parser.arguments(); ++argind )
    {
    if( parser.argument( argind ) != "-" ) filenames_given = true;
    filenames.push_back( parser.argument( argind ) );
    }

  if( filenames.empty() ) filenames.push_back("-");
  if( filenames_given ) set_signals();

  Pretty_print pp( filenames );
  if( program_mode == m_test )
    outhandle = -1;

  int retval = 0;
  for( unsigned int i = 0; i < filenames.size(); ++i )
    {
    struct stat in_stats;
    output_filename.clear();

    if( !filenames[i].size() || filenames[i] == "-" )
      {
      input_filename.clear();
      inhandle = STDIN_FILENO;
      if( program_mode != m_test )
        {
        if( to_stdout || !default_output_filename.size() )
          outhandle = STDOUT_FILENO;
        else
          {
          if( program_mode == m_compress )
            set_c_outname( default_output_filename );
          else output_filename = default_output_filename;
          if( !open_outstream( force ) )
            {
            if( outhandle == -1 && retval < 1 ) retval = 1;
            close( inhandle ); inhandle = -1;
            continue;
            }
          }
        }
      }
    else
      {
      input_filename = filenames[i];
      const int eindex = extension_index( input_filename );
      inhandle = open_instream( input_filename, &in_stats, program_mode,
                                eindex, force, to_stdout );
      if( inhandle < 0 ) { if( retval < 1 ) retval = 1; continue; }
      if( program_mode != m_test )
        {
        if( to_stdout ) outhandle = STDOUT_FILENO;
        else
          {
          if( program_mode == m_compress )
            set_c_outname( input_filename );
          else set_d_outname( input_filename, eindex );
          if( !open_outstream( force ) )
            {
            if( outhandle == -1 && retval < 1 ) retval = 1;
            close( inhandle ); inhandle = -1;
            continue;
            }
          }
        }
      }

    if( !check_tty( inhandle, program_mode ) ) return 1;

    if( output_filename.size() && !to_stdout && program_mode != m_test )
      delete_output_on_interrupt = true;
//    const struct stat * in_statsp = input_filename.size() ? &in_stats : 0;
    pp.set_name( input_filename );
    int tmp = 0;
    switch( program_mode )
      {
      case m_compress:
        /*tmp = compress( inhandle, pp, in_statsp, &retval );*/ break;
      case m_decompress:
        /*tmp = decompress( inhandle, pp );*/ break;
      case m_test:
        tmp = test_type( inhandle, pp ); break;
      }
    if( tmp > retval ) retval = tmp;
    if( tmp && program_mode != m_test ) cleanup_and_fail( retval );
/*
    if( delete_output_on_interrupt )
      close_and_set_permissions( in_statsp, &retval );
    if( input_filename.size() )
      {
      close( inhandle ); inhandle = -1;
      if( !keep_input_files && !to_stdout && program_mode != m_test )
        std::remove( input_filename.c_str() );
      }*/
    }
  if( outhandle >= 0 ) close( outhandle );
  return retval;
  }