summaryrefslogtreecommitdiffstats
path: root/contrib/cpio/copyout.c
blob: 39890b07ef3bf149d9666a530b836dd79729988a (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
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
/* copyout.c - create a cpio archive
   Copyright (C) 1990, 1991, 1992 Free Software Foundation, Inc.

   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 2, 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, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "filetypes.h"
#include "system.h"
#include "cpiohdr.h"
#include "dstring.h"
#include "extern.h"
#include "defer.h"
#include "rmt.h"

static unsigned long read_for_checksum ();
static void tape_clear_rest_of_block ();
static void tape_pad_output ();
static int last_link ();
static int count_defered_links_to_dev_ino ();
static void add_link_defer ();
static void writeout_other_defers ();
static void writeout_final_defers();
static void writeout_defered_file ();
static int check_rdev ();

/* Write out header FILE_HDR, including the file name, to file
   descriptor OUT_DES.  */

void
write_out_header (file_hdr, out_des)
     struct new_cpio_header *file_hdr;
     int out_des;
{
  if (archive_format == arf_newascii || archive_format == arf_crcascii)
    {
      char ascii_header[112];
      char *magic_string;

      if (archive_format == arf_crcascii)
	magic_string = "070702";
      else
	magic_string = "070701";
      sprintf (ascii_header,
	       "%6s%08lx%08lx%08lx%08lx%08lx%08lx%08lx%08lx%08lx%08lx%08lx%08lx%08lx",
	       magic_string,
	       file_hdr->c_ino, file_hdr->c_mode, file_hdr->c_uid,
	       file_hdr->c_gid, file_hdr->c_nlink, file_hdr->c_mtime,
	     file_hdr->c_filesize, file_hdr->c_dev_maj, file_hdr->c_dev_min,
	   file_hdr->c_rdev_maj, file_hdr->c_rdev_min, file_hdr->c_namesize,
	       file_hdr->c_chksum);
      tape_buffered_write (ascii_header, out_des, 110L);

      /* Write file name to output.  */
      tape_buffered_write (file_hdr->c_name, out_des, (long) file_hdr->c_namesize);
      tape_pad_output (out_des, file_hdr->c_namesize + 110);
    }
  else if (archive_format == arf_oldascii || archive_format == arf_hpoldascii)
    {
      char ascii_header[78];
#ifndef __MSDOS__
      dev_t dev;
      dev_t rdev;

      if (archive_format == arf_oldascii)
	{
	  dev = makedev (file_hdr->c_dev_maj, file_hdr->c_dev_min);
	  rdev = makedev (file_hdr->c_rdev_maj, file_hdr->c_rdev_min);
	}
      else
	{
	  /* HP/UX cpio creates archives that look just like ordinary archives,
	     but for devices it sets major = 0, minor = 1, and puts the
	     actual major/minor number in the filesize field.  */
	  switch (file_hdr->c_mode & CP_IFMT)
	    {
	      case CP_IFCHR:
	      case CP_IFBLK:
#ifdef CP_IFSOCK
	      case CP_IFSOCK:
#endif
#ifdef CP_IFIFO
	      case CP_IFIFO:
#endif
		file_hdr->c_filesize = makedev (file_hdr->c_rdev_maj,
						file_hdr->c_rdev_min);
		rdev = 1;
		break;
	      default:
		dev = makedev (file_hdr->c_dev_maj, file_hdr->c_dev_min);
		rdev = makedev (file_hdr->c_rdev_maj, file_hdr->c_rdev_min);
		break;
	    }
	}
#else
      int dev = 0, rdev = 0;
#endif

      if ((file_hdr->c_ino >> 16) != 0)
	error (0, 0, "%s: truncating inode number", file_hdr->c_name);

      sprintf (ascii_header,
	       "%06o%06o%06lo%06lo%06lo%06lo%06lo%06o%011lo%06lo%011lo",
	       file_hdr->c_magic & 0xFFFF, dev & 0xFFFF,
	       file_hdr->c_ino & 0xFFFF, file_hdr->c_mode & 0xFFFF,
	       file_hdr->c_uid & 0xFFFF, file_hdr->c_gid & 0xFFFF,
	       file_hdr->c_nlink & 0xFFFF, rdev & 0xFFFF,
	       file_hdr->c_mtime, file_hdr->c_namesize & 0xFFFF,
	       file_hdr->c_filesize);
      tape_buffered_write (ascii_header, out_des, 76L);

      /* Write file name to output.  */
      tape_buffered_write (file_hdr->c_name, out_des, (long) file_hdr->c_namesize);
    }
  else if (archive_format == arf_tar || archive_format == arf_ustar)
    {
      write_out_tar_header (file_hdr, out_des);
    }
  else
    {
      struct old_cpio_header short_hdr;

      short_hdr.c_magic = 070707;
      short_hdr.c_dev = makedev (file_hdr->c_dev_maj, file_hdr->c_dev_min);

      if ((file_hdr->c_ino >> 16) != 0)
	error (0, 0, "%s: truncating inode number", file_hdr->c_name);

      short_hdr.c_ino = file_hdr->c_ino & 0xFFFF;
      short_hdr.c_mode = file_hdr->c_mode & 0xFFFF;
      short_hdr.c_uid = file_hdr->c_uid & 0xFFFF;
      short_hdr.c_gid = file_hdr->c_gid & 0xFFFF;
      short_hdr.c_nlink = file_hdr->c_nlink & 0xFFFF;
      if (archive_format != arf_hpbinary)
	short_hdr.c_rdev = makedev (file_hdr->c_rdev_maj, file_hdr->c_rdev_min);
      else
	{
	  switch (file_hdr->c_mode & CP_IFMT)
	    {
	      /* HP/UX cpio creates archives that look just like ordinary 
		 archives, but for devices it sets major = 0, minor = 1, and 
		 puts the actual major/minor number in the filesize field.  */
	      case CP_IFCHR:
	      case CP_IFBLK:
#ifdef CP_IFSOCK
	      case CP_IFSOCK:
#endif
#ifdef CP_IFIFO
	      case CP_IFIFO:
#endif
		file_hdr->c_filesize = makedev (file_hdr->c_rdev_maj,
						file_hdr->c_rdev_min);
		short_hdr.c_rdev = makedev (0, 1);
		break;
	      default:
		short_hdr.c_rdev = makedev (file_hdr->c_rdev_maj, 
					    file_hdr->c_rdev_min);
		break;
	    }
	}
      short_hdr.c_mtimes[0] = file_hdr->c_mtime >> 16;
      short_hdr.c_mtimes[1] = file_hdr->c_mtime & 0xFFFF;

      short_hdr.c_namesize = file_hdr->c_namesize & 0xFFFF;

      short_hdr.c_filesizes[0] = file_hdr->c_filesize >> 16;
      short_hdr.c_filesizes[1] = file_hdr->c_filesize & 0xFFFF;

      /* Output the file header.  */
      tape_buffered_write ((char *) &short_hdr, out_des, 26L);

      /* Write file name to output.  */
      tape_buffered_write (file_hdr->c_name, out_des, (long) file_hdr->c_namesize);

      tape_pad_output (out_des, file_hdr->c_namesize + 26);
    }
}

/* Read a list of file names from the standard input
   and write a cpio collection on the standard output.
   The format of the header depends on the compatibility (-c) flag.  */

void
process_copy_out ()
{
  int res;			/* Result of functions.  */
  dynamic_string input_name;	/* Name of file read from stdin.  */
  struct utimbuf times;		/* For resetting file times after copy.  */
  struct stat file_stat;	/* Stat record for file.  */
  struct new_cpio_header file_hdr; /* Output header information.  */
  int in_file_des;		/* Source file descriptor.  */
  int out_file_des;		/* Output file descriptor.  */
  char *p;

  /* Initialize the copy out.  */
  ds_init (&input_name, 128);
  /* Initialize this in case it has members we don't know to set.  */
  bzero (&times, sizeof (struct utimbuf));
  file_hdr.c_magic = 070707;

#ifdef __MSDOS__
  setmode (archive_des, O_BINARY);
#endif
  /* Check whether the output file might be a tape.  */
  out_file_des = archive_des;
  if (_isrmt (out_file_des))
    {
      output_is_special = 1;
      output_is_seekable = 0;
    }
  else
    {
      if (fstat (out_file_des, &file_stat))
	error (1, errno, "standard output is closed");
      output_is_special =
#ifdef S_ISBLK
	S_ISBLK (file_stat.st_mode) ||
#endif
	S_ISCHR (file_stat.st_mode);
      output_is_seekable = S_ISREG (file_stat.st_mode);
    }

  if (append_flag)
    {
      process_copy_in ();
      prepare_append (out_file_des);
    }

  /* Copy files with names read from stdin.  */
  while (ds_fgetstr (stdin, &input_name, name_end) != NULL)
    {
      /* Check for blank line.  */
      if (input_name.ds_string[0] == 0)
	{
	  error (0, 0, "blank line ignored");
	  continue;
	}

      /* Process next file.  */
      if ((*xstat) (input_name.ds_string, &file_stat) < 0)
	error (0, errno, "%s", input_name.ds_string);
      else
	{
	  /* Set values in output header.  */
	  file_hdr.c_dev_maj = major (file_stat.st_dev);
	  file_hdr.c_dev_min = minor (file_stat.st_dev);
	  file_hdr.c_ino = file_stat.st_ino;
	  /* For POSIX systems that don't define the S_IF macros,
	     we can't assume that S_ISfoo means the standard Unix
	     S_IFfoo bit(s) are set.  So do it manually, with a
	     different name.  Bleah.  */
	  file_hdr.c_mode = (file_stat.st_mode & 07777);
	  if (S_ISREG (file_stat.st_mode))
	    file_hdr.c_mode |= CP_IFREG;
	  else if (S_ISDIR (file_stat.st_mode))
	    file_hdr.c_mode |= CP_IFDIR;
#ifdef S_ISBLK
	  else if (S_ISBLK (file_stat.st_mode))
	    file_hdr.c_mode |= CP_IFBLK;
#endif
#ifdef S_ISCHR
	  else if (S_ISCHR (file_stat.st_mode))
	    file_hdr.c_mode |= CP_IFCHR;
#endif
#ifdef S_ISFIFO
	  else if (S_ISFIFO (file_stat.st_mode))
	    file_hdr.c_mode |= CP_IFIFO;
#endif
#ifdef S_ISLNK
	  else if (S_ISLNK (file_stat.st_mode))
	    file_hdr.c_mode |= CP_IFLNK;
#endif
#ifdef S_ISSOCK
	  else if (S_ISSOCK (file_stat.st_mode))
	    file_hdr.c_mode |= CP_IFSOCK;
#endif
#ifdef S_ISNWK
	  else if (S_ISNWK (file_stat.st_mode))
	    file_hdr.c_mode |= CP_IFNWK;
#endif
	  file_hdr.c_uid = file_stat.st_uid;
	  file_hdr.c_gid = file_stat.st_gid;
	  file_hdr.c_nlink = file_stat.st_nlink;

	  /* The rdev is meaningless except for block and character
	     special files (POSIX standard) and perhaps fifos and
	     sockets.  Clear it for other types of files so that
	     check_rdev() doesn't reject files just because stat()
	     put garbage in st_rdev and so that the output doesn't
	     depend on the garbage.  */
	  switch (file_hdr.c_mode & CP_IFMT)
	    {
	      case CP_IFBLK:
	      case CP_IFCHR:
#ifdef CP_IFIFO
	      case CP_IFIFO:
#endif
#ifdef CP_IFSOCK
	      case CP_IFSOCK:
#endif
		file_hdr.c_rdev_maj = major (file_stat.st_rdev);
		file_hdr.c_rdev_min = minor (file_stat.st_rdev);
		break;
	      default:
	      	file_hdr.c_rdev_maj = 0;
		file_hdr.c_rdev_min = 0;
		break;
	    }

	  file_hdr.c_mtime = file_stat.st_mtime;
	  file_hdr.c_filesize = file_stat.st_size;
	  file_hdr.c_chksum = 0;
	  file_hdr.c_tar_linkname = NULL;

	  /* Strip leading `./' from the filename.  */
	  p = input_name.ds_string;
	  while (*p == '.' && *(p + 1) == '/')
	    {
	      ++p;
	      while (*p == '/')
		++p;
	    }
#ifndef HPUX_CDF
	  file_hdr.c_name = p;
	  file_hdr.c_namesize = strlen (p) + 1;
#else
	  if ( (archive_format != arf_tar) && (archive_format != arf_ustar) )
	    {
	      /* We mark CDF's in cpio files by adding a 2nd `/' after the
		 "hidden" directory name.  We need to do this so we can
		 properly recreate the directory as hidden (in case the
		 files of a directory go into the archive before the
		 directory itself (e.g from "find ... -depth ... | cpio")).  */
	      file_hdr.c_name = add_cdf_double_slashes (p);
	      file_hdr.c_namesize = strlen (file_hdr.c_name) + 1;
	    }
	  else
	    {
	      /* We don't mark CDF's in tar files.  We assume the "hidden"
		 directory will always go into the archive before any of
		 its files.  */
	      file_hdr.c_name = p;
	      file_hdr.c_namesize = strlen (p) + 1;
	    }
#endif
	  if ((archive_format == arf_tar || archive_format == arf_ustar)
	      && is_tar_filename_too_long (file_hdr.c_name))
	    {
	      error (0, 0, "%s: file name too long", file_hdr.c_name);
	      continue;
	    }

	  switch (check_rdev (&file_hdr))
	    {
	      case 1:
		error (0, 0, "%s not dumped: major number would be truncated",
		       file_hdr.c_name);
		continue;
	      case 2:
		error (0, 0, "%s not dumped: minor number would be truncated",
		       file_hdr.c_name);
		continue;
	      case 4:
		error (0, 0, "%s not dumped: device number would be truncated",
		       file_hdr.c_name);
		continue;
	    }


	  /* Copy the named file to the output.  */
	  switch (file_hdr.c_mode & CP_IFMT)
	    {
	    case CP_IFREG:
#ifndef __MSDOS__
	      if (archive_format == arf_tar || archive_format == arf_ustar)
		{
		  char *otherfile;
		  if ((otherfile = find_inode_file (file_hdr.c_ino,
						    file_hdr.c_dev_maj,
						    file_hdr.c_dev_min)))
		    {
		      file_hdr.c_tar_linkname = otherfile;
		      write_out_header (&file_hdr, out_file_des);
		      break;
		    }
		}
	      if ( (archive_format == arf_newascii || archive_format == arf_crcascii)
		  && (file_hdr.c_nlink > 1) )
		{
		  if (last_link (&file_hdr) )
		    {
		      writeout_other_defers (&file_hdr, out_file_des);
		    }
		  else
		    {
		      add_link_defer (&file_hdr);
		      break;
		    }
		}
#endif
	      in_file_des = open (input_name.ds_string,
				  O_RDONLY | O_BINARY, 0);
	      if (in_file_des < 0)
		{
		  error (0, errno, "%s", input_name.ds_string);
		  continue;
		}

	      if (archive_format == arf_crcascii)
		file_hdr.c_chksum = read_for_checksum (in_file_des,
						       file_hdr.c_filesize,
						       input_name.ds_string);

	      write_out_header (&file_hdr, out_file_des);
	      copy_files_disk_to_tape (in_file_des, out_file_des, file_hdr.c_filesize, input_name.ds_string);

#ifndef __MSDOS__
	      if (archive_format == arf_tar || archive_format == arf_ustar)
		add_inode (file_hdr.c_ino, file_hdr.c_name, file_hdr.c_dev_maj,
			   file_hdr.c_dev_min);
#endif

	      tape_pad_output (out_file_des, file_hdr.c_filesize);

	      if (close (in_file_des) < 0)
		error (0, errno, "%s", input_name.ds_string);
	      if (reset_time_flag)
		{
		  times.actime = file_stat.st_atime;
		  times.modtime = file_stat.st_mtime;
		  if (utime (file_hdr.c_name, &times) < 0)
		    error (0, errno, "%s", file_hdr.c_name);
		}
	      break;

	    case CP_IFDIR:
	      file_hdr.c_filesize = 0;
	      write_out_header (&file_hdr, out_file_des);
	      break;

#ifndef __MSDOS__
	    case CP_IFCHR:
	    case CP_IFBLK:
#ifdef CP_IFSOCK
	    case CP_IFSOCK:
#endif
#ifdef CP_IFIFO
	    case CP_IFIFO:
#endif
	      if (archive_format == arf_tar)
		{
		  error (0, 0, "%s not dumped: not a regular file",
			 file_hdr.c_name);
		  continue;
		}
	      else if (archive_format == arf_ustar)
		{
		  char *otherfile;
		  if ((otherfile = find_inode_file (file_hdr.c_ino,
						    file_hdr.c_dev_maj,
						    file_hdr.c_dev_min)))
		    {
		      /* This file is linked to another file already in the 
		         archive, so write it out as a hard link. */
		      file_hdr.c_mode = (file_stat.st_mode & 07777);
		      file_hdr.c_mode |= CP_IFREG;
		      file_hdr.c_tar_linkname = otherfile;
		      write_out_header (&file_hdr, out_file_des);
		      break;
		    }
		  add_inode (file_hdr.c_ino, file_hdr.c_name, 
			     file_hdr.c_dev_maj, file_hdr.c_dev_min);
		}
	      file_hdr.c_filesize = 0;
	      write_out_header (&file_hdr, out_file_des);
	      break;
#endif

#ifdef CP_IFLNK
	    case CP_IFLNK:
	      {
		char *link_name = (char *) xmalloc (file_stat.st_size + 1);
		int link_size;

		link_size = readlink (input_name.ds_string, link_name,
			              file_stat.st_size);
		if (link_size < 0)
		  {
		    error (0, errno, "%s", input_name.ds_string);
		    free (link_name);
		    continue;
		  }
		file_hdr.c_filesize = link_size;
		if (archive_format == arf_tar || archive_format == arf_ustar)
		  {
		    if (link_size + 1 > 100)
		      {
			error (0, 0, "%s: symbolic link too long",
			       file_hdr.c_name);
		      }
		    else
		      {
			link_name[link_size] = '\0';
			file_hdr.c_tar_linkname = link_name;
			write_out_header (&file_hdr, out_file_des);
		      }
		  }
		else
		  {
		    write_out_header (&file_hdr, out_file_des);
		    tape_buffered_write (link_name, out_file_des, link_size);
		    tape_pad_output (out_file_des, link_size);
		  }
		free (link_name);
	      }
	      break;
#endif

	    default:
	      error (0, 0, "%s: unknown file type", input_name.ds_string);
	    }

	  if (verbose_flag)
	    fprintf (stderr, "%s\n", input_name.ds_string);
	  if (dot_flag)
	    fputc ('.', stderr);
	}
    }

  writeout_final_defers(out_file_des);
  /* The collection is complete; append the trailer.  */
  file_hdr.c_ino = 0;
  file_hdr.c_mode = 0;
  file_hdr.c_uid = 0;
  file_hdr.c_gid = 0;
  file_hdr.c_nlink = 1;		/* Must be 1 for crc format.  */
  file_hdr.c_dev_maj = 0;
  file_hdr.c_dev_min = 0;
  file_hdr.c_rdev_maj = 0;
  file_hdr.c_rdev_min = 0;
  file_hdr.c_mtime = 0;
  file_hdr.c_chksum = 0;

  file_hdr.c_filesize = 0;
  file_hdr.c_namesize = 11;
  file_hdr.c_name = "TRAILER!!!";
  if (archive_format != arf_tar && archive_format != arf_ustar)
    write_out_header (&file_hdr, out_file_des);
  else
    {
      tape_buffered_write (zeros_512, out_file_des, 512);
      tape_buffered_write (zeros_512, out_file_des, 512);
    }

  /* Fill up the output block.  */
  tape_clear_rest_of_block (out_file_des);
  tape_empty_output_buffer (out_file_des);
  if (dot_flag)
    fputc ('\n', stderr);
  if (!quiet_flag)
    {
      res = (output_bytes + io_block_size - 1) / io_block_size;
      if (res == 1)
	fprintf (stderr, "1 block\n");
      else
	fprintf (stderr, "%d blocks\n", res);
    }
}

/* Read FILE_SIZE bytes of FILE_NAME from IN_FILE_DES and
   compute and return a checksum for them.  */

static unsigned long
read_for_checksum (in_file_des, file_size, file_name)
     int in_file_des;
     int file_size;
     char *file_name;
{
  unsigned long crc;
  char buf[BUFSIZ];
  int bytes_left;
  int bytes_read;
  int i;

  crc = 0;

  for (bytes_left = file_size; bytes_left > 0; bytes_left -= bytes_read)
    {
      bytes_read = read (in_file_des, buf, BUFSIZ);
      if (bytes_read < 0)
	error (1, errno, "cannot read checksum for %s", file_name);
      if (bytes_read == 0)
	break;
      for (i = 0; i < bytes_read; ++i)
	crc += buf[i] & 0xff;
    }
  if (lseek (in_file_des, 0L, SEEK_SET))
    error (1, errno, "cannot read checksum for %s", file_name);

  return crc;
}

/* Write out NULs to fill out the rest of the current block on
   OUT_FILE_DES.  */

static void
tape_clear_rest_of_block (out_file_des)
     int out_file_des;
{
  while (output_size < io_block_size)
    {
      if ((io_block_size - output_size) > 512)
	tape_buffered_write (zeros_512, out_file_des, 512);
      else
	tape_buffered_write (zeros_512, out_file_des, io_block_size - output_size);
    }
}

/* Write NULs on OUT_FILE_DES to move from OFFSET (the current location)
   to the end of the header.  */

static void
tape_pad_output (out_file_des, offset)
     int out_file_des;
     int offset;
{
  int pad;

  if (archive_format == arf_newascii || archive_format == arf_crcascii)
    pad = (4 - (offset % 4)) % 4;
  else if (archive_format == arf_tar || archive_format == arf_ustar)
    pad = (512 - (offset % 512)) % 512;
  else if (archive_format != arf_oldascii && archive_format != arf_hpoldascii)
    pad = (2 - (offset % 2)) % 2;
  else
    pad = 0;

  if (pad != 0)
    tape_buffered_write (zeros_512, out_file_des, pad);
}


/* When creating newc and crc archives if a file has multiple (hard)
   links, we don't put any of them into the archive until we have seen
   all of them (or until we get to the end of the list of files that
   are going into the archive and know that we have seen all of the links
   to the file that we will see).  We keep these "defered" files on
   this list.   */

struct deferment *deferouts = NULL;


/* Is this file_hdr the last (hard) link to a file?  I.e., have
   we already seen and defered all of the other links?  */

static int
last_link (file_hdr)
  struct new_cpio_header *file_hdr;
{
  int	other_files_sofar;

  other_files_sofar = count_defered_links_to_dev_ino (file_hdr);
  if (file_hdr->c_nlink == (other_files_sofar + 1) )
    {
      return 1;
    }
  return 0;
}

/* Count the number of other (hard) links to this file that have
   already been defered.  */

static int
count_defered_links_to_dev_ino (file_hdr)
  struct new_cpio_header *file_hdr;
{
  struct deferment *d;
  int	ino;
  int 	maj;
  int   min;
  int 	count;
  ino = file_hdr->c_ino;
  maj = file_hdr->c_dev_maj;
  min = file_hdr->c_dev_min;
  count = 0;
  for (d = deferouts; d != NULL; d = d->next)
    {
      if ( (d->header.c_ino == ino) && (d->header.c_dev_maj == maj)
	  && (d->header.c_dev_min == min) )
	++count;
    }
  return count;
}

/* Add the file header for a link that is being defered to the deferouts
   list.  */

static void
add_link_defer (file_hdr)
  struct new_cpio_header *file_hdr;
{
  struct deferment *d;
  d = create_deferment (file_hdr);
  d->next = deferouts;
  deferouts = d;
}

/* We are about to put a file into a newc or crc archive that is
   multiply linked.  We have already seen and defered all of the
   other links to the file but haven't written them into the archive.
   Write the other links into the archive, and remove them from the
   deferouts list.  */

static void
writeout_other_defers (file_hdr, out_des)
  struct new_cpio_header *file_hdr;
  int out_des;
{
  struct deferment *d;
  struct deferment *d_prev;
  int	ino;
  int 	maj;
  int   min;
  ino = file_hdr->c_ino;
  maj = file_hdr->c_dev_maj;
  min = file_hdr->c_dev_min;
  d_prev = NULL;
  d = deferouts;
  while (d != NULL)
    {
      if ( (d->header.c_ino == ino) && (d->header.c_dev_maj == maj)
	  && (d->header.c_dev_min == min) )
	{
	  struct deferment *d_free;
	  d->header.c_filesize = 0;
	  write_out_header (&d->header, out_des);
	  if (d_prev != NULL)
	    d_prev->next = d->next;
	  else
	    deferouts = d->next;
	  d_free = d;
	  d = d->next;
	  free_deferment (d_free);
	}
      else
	{
	  d_prev = d;
	  d = d->next;
	}
    }
  return;
}
/* When writing newc and crc format archives we defer multiply linked
   files until we have seen all of the links to the file.  If a file
   has links to it that aren't going into the archive, then we will
   never see the "last" link to the file, so at the end we just write 
   all of the leftover defered files into the archive.  */

static void
writeout_final_defers(out_des)
  int	out_des;
{
  struct deferment *d;
  int other_count;
  while (deferouts != NULL)
    {
      d = deferouts;
      other_count = count_defered_links_to_dev_ino (&d->header);
      if (other_count == 1)
	{
	  writeout_defered_file (&d->header, out_des);
	}
      else
	{
	  struct new_cpio_header file_hdr;
	  file_hdr = d->header;
	  file_hdr.c_filesize = 0;
	  write_out_header (&file_hdr, out_des);
	}
      deferouts = deferouts->next;
    }
}

/* Write a file into the archive.  This code is the same as
   the code in process_copy_out(), but we need it here too
   for writeout_final_defers() to call.  */

static void
writeout_defered_file (header, out_file_des)
  struct new_cpio_header *header;
  int out_file_des;
{
  int in_file_des;
  struct new_cpio_header file_hdr;
  struct utimbuf times;		/* For setting file times.  */
  /* Initialize this in case it has members we don't know to set.  */
  bzero (&times, sizeof (struct utimbuf));

  file_hdr = *header;


  in_file_des = open (header->c_name,
		      O_RDONLY | O_BINARY, 0);
  if (in_file_des < 0)
    {
      error (0, errno, "%s", header->c_name);
      return;
    }

  if (archive_format == arf_crcascii)
    file_hdr.c_chksum = read_for_checksum (in_file_des,
					   file_hdr.c_filesize,
					   header->c_name);

  write_out_header (&file_hdr, out_file_des);
  copy_files_disk_to_tape (in_file_des, out_file_des, file_hdr.c_filesize, header->c_name);

#ifndef __MSDOS__
  if (archive_format == arf_tar || archive_format == arf_ustar)
    add_inode (file_hdr.c_ino, file_hdr.c_name, file_hdr.c_dev_maj,
	       file_hdr.c_dev_min);
#endif

  tape_pad_output (out_file_des, file_hdr.c_filesize);

  if (close (in_file_des) < 0)
    error (0, errno, "%s", header->c_name);
  if (reset_time_flag)
    {
      times.actime = file_hdr.c_mtime;
      times.modtime = file_hdr.c_mtime;
      if (utime (file_hdr.c_name, &times) < 0)
	error (0, errno, "%s", file_hdr.c_name);
    }
  return;
}


static int
check_rdev (file_hdr)
     struct new_cpio_header *file_hdr;
{
  if (archive_format == arf_newascii || archive_format == arf_crcascii)
    {
      if ((file_hdr->c_rdev_maj & 0xFFFFFFFF) != file_hdr->c_rdev_maj)
        return 1;
      if ((file_hdr->c_rdev_min & 0xFFFFFFFF) != file_hdr->c_rdev_min)
        return 2;
    }
  else if (archive_format == arf_oldascii || archive_format == arf_hpoldascii)
    {
#ifndef __MSDOS__
      dev_t rdev;

      rdev = makedev (file_hdr->c_rdev_maj, file_hdr->c_rdev_min);
      if (archive_format == arf_oldascii)
	{
	  if ((rdev & 0xFFFF) != rdev)
	    return 4;
	}
      else
	{
	  switch (file_hdr->c_mode & CP_IFMT)
	    {
	      case CP_IFCHR:
	      case CP_IFBLK:
#ifdef CP_IFSOCK
	      case CP_IFSOCK:
#endif
#ifdef CP_IFIFO
	      case CP_IFIFO:
#endif
		/* We could handle one more bit if longs are >= 33 bits.  */
		if ((rdev & 037777777777) != rdev)
		  return 4;
		break;
	      default:
		if ((rdev & 0xFFFF) != rdev)
		  return 4;
		break;
	    }
	}
#endif
    }
  else if (archive_format == arf_tar || archive_format == arf_ustar)
    {
      /* The major and minor formats are limited to 7 octal digits in ustar
	 format, and to_oct () adds a gratuitous trailing blank to further
	 limit the format to 6 octal digits.  */
      if ((file_hdr->c_rdev_maj & 0777777) != file_hdr->c_rdev_maj)
        return 1;
      if ((file_hdr->c_rdev_min & 0777777) != file_hdr->c_rdev_min)
        return 2;
    }
  else
    {
#ifndef __MSDOS__
      dev_t rdev;

      rdev = makedev (file_hdr->c_rdev_maj, file_hdr->c_rdev_min);
      if (archive_format != arf_hpbinary)
	{
	  if ((rdev & 0xFFFF) != rdev)
	return 4;
    }
  else
    {
      switch (file_hdr->c_mode & CP_IFMT)
	{
	  case CP_IFCHR:
	  case CP_IFBLK:
#ifdef CP_IFSOCK
	  case CP_IFSOCK:
#endif
#ifdef CP_IFIFO
	  case CP_IFIFO:
#endif
	    if ((rdev & 0xFFFFFFFF) != rdev)
	      return 4;
	    file_hdr->c_filesize = rdev;
	    rdev = makedev (0, 1);
	    break;
	  default:
	    if ((rdev & 0xFFFF) != rdev)
	      return 4;
	    break;
	}
    }
#endif
  }
  return 0;
}
OpenPOWER on IntegriCloud