summaryrefslogtreecommitdiff
path: root/misc/badblocks.c
blob: 6057115e7a9b1352e7690f2915df98727a140bac (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
/*
 * badblocks.c		- Bad blocks checker
 *
 * Copyright (C) 1992, 1993, 1994  Remy Card <card@masi.ibp.fr>
 *                                 Laboratoire MASI, Institut Blaise Pascal
 *                                 Universite Pierre et Marie Curie (Paris VI)
 *
 * Copyright 1995, 1996, 1997, 1998, 1999 by Theodore Ts'o
 * Copyright 1999 by David Beattie
 *
 * This file is based on the minix file system programs fsck and mkfs
 * written and copyrighted by Linus Torvalds <Linus.Torvalds@cs.helsinki.fi>
 * 
 * %Begin-Header%
 * This file may be redistributed under the terms of the GNU Public
 * License.
 * %End-Header%
 */

/*
 * History:
 * 93/05/26	- Creation from e2fsck
 * 94/02/27	- Made a separate bad blocks checker
 * 99/06/30...99/07/26 - Added non-destructive write-testing,
 *                       configurable blocks-at-once parameter,
 * 			 loading of badblocks list to avoid testing
 * 			 blocks known to be bad, multiple passes to 
 * 			 make sure that no new blocks are added to the
 * 			 list.  (Work done by David Beattie)
 */

#include <errno.h>
#include <fcntl.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <setjmp.h>

#include <sys/ioctl.h>
#include <sys/types.h>

#if HAVE_LINUX_FS_H
#include <linux/fd.h>
#endif

#include "et/com_err.h"
#include "ext2fs/ext2_io.h"
#include <linux/ext2_fs.h>
#include "ext2fs/ext2fs.h"
#include "nls-enable.h"

const char * program_name = "badblocks";
const char * done_string = _("done                        \n");

int v_flag = 0;			/* verbose */
int w_flag = 0;			/* do r/w test: 0=no, 1=yes, 2=non-destructive */
int s_flag = 0;			/* show progress of test */

static void usage(void)
{
	fprintf(stderr, _("Usage: %s [-b block_size] [-i input_file] [-o output_file] [-svwn]\n [-c blocks_at_once] [-p num_passes] device blocks_count [start_count]\n"),
		 program_name);
	exit (1);
}

static unsigned long currently_testing = 0;
static unsigned long num_blocks = 0;
static ext2_badblocks_list bb_list = NULL;
static FILE *out;
static blk_t next_bad = 0;
static ext2_badblocks_iterate bb_iter = NULL;

/*
 * This routine reports a new bad block.  If the bad block has already
 * been seen before, then it returns 0; otherwise it returns 1.
 */
static int bb_output (unsigned long bad)
{
	errcode_t errcode;

	if (ext2fs_badblocks_list_test(bb_list, bad))
		return 0;

	fprintf (out, "%lu\n", bad);

	errcode = ext2fs_badblocks_list_add (bb_list, bad);
	if (errcode) {
		com_err (program_name, errcode, "adding to in-memory bad block list");
		exit (1);
	}

	/* kludge:
	   increment the iteration through the bb_list if 
	   an element was just added before the current iteration
	   position.  This should not cause next_bad to change. */
	if (bb_iter && bad < next_bad)
		ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
	return 1;
}

static void print_status (void)
{
	fprintf(stderr, "%9ld/%9ld", currently_testing, num_blocks);
	fprintf(stderr, "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
	fflush (stderr);
}

static void alarm_intr (int alnum)
{
	signal (SIGALRM, alarm_intr);
	alarm(1);
	if (!num_blocks)
		return;
	fprintf(stderr, "%9ld/%9ld", currently_testing, num_blocks);
	fprintf(stderr, "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
	fflush (stderr);
}

static void *terminate_addr = NULL;

static void terminate_intr (int signo)
{
	if (terminate_addr)
		longjmp(terminate_addr,1);
	exit(1);
}

static void capture_terminate (jmp_buf term_addr)
{
	terminate_addr = term_addr;
	signal (SIGHUP, terminate_intr);
	signal (SIGINT, terminate_intr);
	signal (SIGPIPE, terminate_intr);
	signal (SIGTERM, terminate_intr);
	signal (SIGUSR1, terminate_intr);
	signal (SIGUSR2, terminate_intr);
}

/*
 * Perform a read of a sequence of blocks; return the number of blocks
 *    successfully sequentially read.
 */
static long do_read (int dev, char * buffer, int try, int block_size,
		     unsigned long current_block)
{
	long got;

	if (v_flag > 1)
		print_status();

	/* Seek to the correct loc. */
	if (ext2fs_llseek (dev, (ext2_loff_t) current_block * block_size,
			 SEEK_SET) != (ext2_loff_t) current_block * block_size)
		com_err (program_name, errno, _("during seek"));

	/* Try the read */
	got = read (dev, buffer, try * block_size);
	if (got < 0)
		got = 0;	
	if (got & 511)
		fprintf(stderr, _("Weird value (%ld) in do_read\n"), got);
	got /= block_size;
	return got;
}

/*
 * Perform a write of a sequence of blocks; return the number of blocks
 *    successfully sequentially written.
 */
static long do_write (int dev, char * buffer, int try, int block_size,
		     unsigned long current_block)
{
	long got;

	if (v_flag > 1)
		print_status();

	/* Seek to the correct loc. */
	if (ext2fs_llseek (dev, (ext2_loff_t) current_block * block_size,
			 SEEK_SET) != (ext2_loff_t) current_block * block_size)
		com_err (program_name, errno, _("during seek"));

	/* Try the write */
	got = write (dev, buffer, try * block_size);
	if (got < 0)
		got = 0;	
	if (got & 511)
		fprintf (stderr,
			 "Weird value (%ld) in do_write\n", got);
	got /= block_size;
	return got;
}

static int host_dev;

static void flush_bufs (int dev, int sync)
{
  if (v_flag
#if !defined (BLKFLSBUF) && !defined (FDFLUSH)
      && sync
#endif
      )
    fprintf (stderr, _("Flushing buffers\n"));

  if (sync && fdatasync (dev) == -1)
    com_err (program_name, errno, _("during fsync"));

#ifdef BLKFLSBUF
  ioctl (host_dev, BLKFLSBUF, 0);   /* In case this is a HD */
#endif
#ifdef FDFLUSH
  ioctl (host_dev, FDFLUSH, 0);   /* In case this is floppy */
#endif
}

static unsigned int test_ro (int dev, unsigned long blocks_count,
			     int block_size, unsigned long from_count,
			     unsigned long blocks_at_once)
{
	char * blkbuf;
	int try;
	long got;
	unsigned int bb_count = 0;
	errcode_t errcode;

	errcode = ext2fs_badblocks_list_iterate_begin(bb_list,&bb_iter);
	if (errcode) {
		com_err (program_name, errcode,
			 _("while beginning bad block list iteration"));
		exit (1);
	}
	do {
		ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
	} while (next_bad && next_bad < from_count);

	blkbuf = malloc (blocks_at_once * block_size);
	if (!blkbuf)
	{
		com_err (program_name, ENOMEM, _("while allocating buffers"));
		exit (1);
	}
	flush_bufs (dev, 0);
	if (v_flag) {
	    fprintf(stderr, _("Checking for bad blocks in read-only mode\n"));
	    fprintf (stderr, _("From block %lu to %lu\n"), from_count,
		     blocks_count);
	}
	try = blocks_at_once;
	currently_testing = from_count;
	num_blocks = blocks_count;
	if (s_flag || v_flag > 1) {
		fprintf(stderr,
			_("Checking for bad blocks (read-only test): "));
		if (v_flag <= 1)
			alarm_intr(SIGALRM);
	}
	while (currently_testing < blocks_count)
	{
		if (next_bad) {
			if (currently_testing == next_bad) {
				/* fprintf (out, "%lu\n", nextbad); */
				ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
				currently_testing++;
				continue;
			}
			else if (currently_testing + try > next_bad)
				try = next_bad - currently_testing;
		}
		if (currently_testing + try > blocks_count)
			try = blocks_count - currently_testing;
		got = do_read (dev, blkbuf, try, block_size, currently_testing);
		currently_testing += got;
		if (got == try) {
			try = blocks_at_once;
			continue;
		}
		else
			try = 1;
		if (got == 0) {
			bb_count += bb_output(currently_testing++);
		}
	}
	num_blocks = 0;
	alarm(0);
	if (s_flag || v_flag > 1)
		fprintf(stderr, done_string);

	fflush (stderr);
	free (blkbuf);

	ext2fs_badblocks_list_iterate_end(bb_iter);

	return bb_count;
}

static unsigned int test_rw (int dev, unsigned long blocks_count,
			     int block_size, unsigned long from_count,
			     unsigned long blocks_at_once)
{
	int i;
	char * buffer;
	unsigned char pattern[] = {0xaa, 0x55, 0xff, 0x00};
	unsigned int bb_count = 0;

	buffer = malloc (2 * block_size);
	if (!buffer)
	{
		com_err (program_name, ENOMEM, _("while allocating buffers"));
		exit (1);
	}

	flush_bufs (dev, 0);

	if (v_flag) {
		fprintf(stderr,
			_("Checking for bad blocks in read-write mode\n"));
		fprintf(stderr, _("From block %lu to %lu\n"),
			 from_count, blocks_count);
	}
	for (i = 0; i < sizeof (pattern); i++) {
		memset (buffer, pattern[i], block_size);
		if (s_flag | v_flag)
			fprintf (stderr, _("Writing pattern 0x%08x: "),
				 *((int *) buffer));
		num_blocks = blocks_count;
		currently_testing = from_count;
		if (s_flag && v_flag <= 1)
			alarm_intr(SIGALRM);
		for (;
		     currently_testing < blocks_count;
		     currently_testing++)
		{
			if (ext2fs_llseek (dev, (ext2_loff_t) currently_testing *
					 block_size, SEEK_SET) !=
			    (ext2_loff_t) currently_testing * block_size)
				com_err (program_name, errno,
					 _("during seek on block %d"),
					 currently_testing);
			if (v_flag > 1)
				print_status();
			write (dev, buffer, block_size);
		}
		num_blocks = 0;
		alarm (0);
		if (s_flag | v_flag)
			fprintf(stderr, done_string);
		flush_bufs (dev, 1);
		if (s_flag | v_flag)
			fprintf (stderr, _("Reading and comparing: "));
		num_blocks = blocks_count;
		currently_testing = from_count;
		if (s_flag && v_flag <= 1)
			alarm_intr(SIGALRM);
		for (;
		     currently_testing < blocks_count;
		     currently_testing++)
		{
			if (ext2fs_llseek (dev, (ext2_loff_t) currently_testing *
					 block_size, SEEK_SET) !=
			    (ext2_loff_t) currently_testing * block_size)
				com_err (program_name, errno,
					 _("during seek on block %d"),
					 currently_testing);
			if (v_flag > 1)
				print_status();
			if ((read (dev, buffer + block_size, block_size) 
			     < block_size) ||
			    memcmp(buffer, buffer + block_size, block_size))
				bb_count = bb_output(currently_testing);
		}
		num_blocks = 0;
		alarm (0);
		if (s_flag | v_flag)
			fprintf(stderr, done_string);
		flush_bufs (dev, 0);
	}

	return bb_count;
}

static unsigned int test_nd (int dev, unsigned long blocks_count,
			     int block_size, unsigned long from_count,
			     unsigned long blocks_at_once)
{
	char *blkbuf, *save_ptr, *test_ptr, *read_ptr;
	char * ptr;
	int try, i;
	long got, used2;
	unsigned long *bufblk;
	unsigned long *bufblks;
	jmp_buf terminate_env;
	errcode_t errcode;
	/* These are static to prevent being clobbered by the longjmp */
	static long buf_used;
	static unsigned int bb_count;

	bb_count = 0;
	buf_used = 0;

	errcode = ext2fs_badblocks_list_iterate_begin(bb_list,&bb_iter);
	if (errcode) {
		com_err (program_name, errcode,
			 _("while beginning bad block list iteration"));
		exit (1);
	}
	do {
		ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
	} while (next_bad && next_bad < from_count);

	blkbuf = malloc (3 * blocks_at_once * block_size);
	bufblk = malloc (blocks_at_once * sizeof(unsigned long));
	bufblks = malloc (blocks_at_once * sizeof(unsigned long));
	if (!blkbuf || !bufblk || !bufblks) {
		com_err(program_name, ENOMEM, _("while allocating buffers"));
		exit (1);
	}

	/* inititalize the test data randomly: */
	if (v_flag) {
		fprintf (stderr, _("Initializing random test data\n"));
	}
	for(ptr = blkbuf + blocks_at_once * block_size;
	    ptr < blkbuf + 2 * blocks_at_once * block_size;
	    ++ptr) {
		(*ptr) = random() % (1 << sizeof(char));
	}

	flush_bufs (dev, 0);
	if (v_flag) {
	    fprintf (stderr,
		     _("Checking for bad blocks in non-destructive read-write mode\n"));
	    fprintf (stderr, _("From block %lu to %lu\n"), from_count, blocks_count);
	}
	if (s_flag || v_flag > 1) {
		fprintf(stderr, _("Checking for bad blocks (non-destructive read-write test): "));
		if (v_flag <= 1)
			alarm_intr(SIGALRM);
	}
	if (! setjmp(terminate_env)) {
		/* set up abend handler */
		capture_terminate(terminate_env);

		buf_used = 0; save_ptr = blkbuf;
		test_ptr = blkbuf + (blocks_at_once * block_size);
		currently_testing = from_count;
		num_blocks = blocks_count;

		while (currently_testing < blocks_count) {
			try = blocks_at_once - buf_used;
			if (next_bad) {
				if (currently_testing == next_bad) {
					/* fprintf (out, "%lu\n", nextbad); */
					ext2fs_badblocks_list_iterate (bb_iter, &next_bad);
					bufblk[buf_used] = currently_testing++;
					goto test_full_buf;
				}
				else if (currently_testing + try > next_bad)
					try = next_bad - currently_testing;
			}
			if (currently_testing + try > blocks_count)
				try = blocks_count - currently_testing;
			got = do_read (dev, save_ptr, try, block_size,
				       currently_testing);

			/* if reading succeeded, write the test data */
			if (got) {
				long written;

				written = do_write (dev, test_ptr, got, 
						    block_size,
						    currently_testing);
				if (written != got)
					com_err (program_name, errno,
				 _("during test data write, block %lu"),
						 currently_testing + written);
			}

			bufblk[buf_used] = currently_testing;
			bufblks[buf_used] = got;
			buf_used += got;
			save_ptr += got * block_size;
			test_ptr += got * block_size;
			currently_testing += got;
			if (got != try)
				bb_count += bb_output(currently_testing++);

			test_full_buf:
			/*
			 * If there's room for more blocks to be
			 * tested this around, and we're not done yet
			 * testing the disk, go back and get some
			 * more blocks.
			 */
			if ((buf_used != blocks_at_once) &&
			    (currently_testing != blocks_count))
				continue;

			flush_bufs (dev, 1);

			/*
			 * for each contiguous block that we read into
			 * the buffer (and wrote test data into
			 * afterwards), read it back (looping if
			 * necessary, to get past newly discovered
			 * unreadable blocks, of which there should be
			 * none, but with a hard drive which is
			 * unreliable, it has happened), and compare
			 * with the test data that was written; output
			 * to the bad block list if it doesn't match.
			 */
			used2 = 0;
			save_ptr = blkbuf;
			test_ptr = blkbuf + (blocks_at_once * block_size);
			read_ptr = blkbuf + (2 * blocks_at_once * block_size);
			currently_testing = bufblk[0];
			try = bufblks[0];
			while (currently_testing < blocks_count) {

				got = do_read (dev, read_ptr, try,
					       block_size, currently_testing);

				/* test the comparison between all the
				   blocks successfully read  */
				for (i = 0; i < got; ++i)
					if (memcmp (test_ptr, read_ptr,
						    block_size))
						bb_count += bb_output(currently_testing + i);
				if (got == 0) {
					bb_count += bb_output(currently_testing);
					got = 1;
				}
					
				/* when done, write back original data */
				do_write (dev, save_ptr, got, block_size, 
					  currently_testing);

				currently_testing += got;
				save_ptr += bufblks[got] * block_size;
				test_ptr += bufblks[got] * block_size;
				read_ptr += bufblks[got] * block_size;
				try -= got;

				if (try == 0) {
					used2 += bufblks[used2];
					if (used2 >= blocks_at_once)
						break;
					currently_testing = bufblk[used2];
					try = bufblks[used2];
				}
			}

			/* empty the buffer so it can be reused */
			buf_used = 0;
		}
		num_blocks = 0;
		alarm(0);
		if (s_flag || v_flag > 1)
			fprintf(stderr, done_string);

	} else {
		/* abnormal termination by a signal is handled here */
		/* logic is: write back the data that is in the buffer,
		   so that we can maintain data integrity on disk.  Then
		   abort. */
		long buf_written;

		fprintf(stderr, _("Interrupt caught, cleaning up\n"));

		for (buf_written = 0;
		        buf_written < buf_used;
		           buf_written += bufblks[buf_written])
			do_write (dev, blkbuf + buf_written * block_size,
				  bufblks[buf_written], block_size, 
				  bufblk[buf_written]);

		fflush (out);
		exit(1);
	}

	fflush(stderr);
	free(blkbuf);
	free(bufblk);
	free(bufblks);

	ext2fs_badblocks_list_iterate_end(bb_iter);

	return bb_count;
}

int main (int argc, char ** argv)
{
	int c;
	char * tmp;
	char * device_name;
	char * host_device_name = NULL;
	char * input_file = NULL;
	char * output_file = NULL;
	FILE * in = NULL;
	int block_size = 1024;
	unsigned long blocks_at_once = 16;
	unsigned long blocks_count, from_count;
	int num_passes = 0;
	int passes_clean = 0;
	int dev;
	errcode_t errcode;

	setbuf(stdout, NULL);
	setbuf(stderr, NULL);
#ifdef ENABLE_NLS
	setlocale(LC_MESSAGES, "");
	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
	textdomain(NLS_CAT_NAME);
#endif
	if (argc && *argv)
		program_name = *argv;
	while ((c = getopt (argc, argv, "b:i:o:svwnc:p:h:")) != EOF) {
		switch (c) {
		case 'b':
			block_size = strtoul (optarg, &tmp, 0);
			if (*tmp || block_size > 4096) {
				com_err (program_name, 0,
					 _("bad block size - %s"), optarg);
				exit (1);
			}
			break;
		case 'i':
			input_file = optarg;
			break;
		case 'o':
			output_file = optarg;
			break;
		case 's':
			s_flag = 1;
			break;
		case 'v':
			v_flag++;
			break;
		case 'w':
			if (! w_flag)
				w_flag = 1;
			break;
		case 'n':
			w_flag = 2;
			break;
		case 'c':
			blocks_at_once = strtoul (optarg, &tmp, 0);
			if (*tmp) {
				com_err (program_name, 0,
					 "bad simultaneous block count - %s", optarg);
				exit (1);
			}
			break;
		case 'p':
			num_passes = strtoul (optarg, &tmp, 0);
			if (*tmp) {
				com_err (program_name, 0,
				    "bad number of clean passes - %s", optarg);
				exit (1);
			}
			break;
		case 'h':
			host_device_name = optarg;
			break;
		default:
			usage();
		}
	}
	if (optind > argc - 1)
		usage();
	device_name = argv[optind++];
	if (optind > argc - 1)
		usage();
	blocks_count = strtoul (argv[optind], &tmp, 0);
	if (*tmp)
	{
		com_err (program_name, 0, _("bad blocks count - %s"),
			 argv[optind]);
		exit (1);
	}
	if (++optind <= argc-1) {
		from_count = strtoul (argv[optind], &tmp, 0);
	} else from_count = 0;
	if (from_count >= blocks_count) {
	    com_err (program_name, 0, _("bad blocks range: %lu-%lu"),
		     from_count, blocks_count);
	    exit (1);
	}
	dev = open (device_name, w_flag ? O_RDWR : O_RDONLY);
	if (dev == -1)
	{
		com_err (program_name, errno, _("while trying to open %s"),
			 device_name);
		exit (1);
	}
	if (host_device_name) {
		host_dev = open (host_device_name, O_RDONLY);
		if (host_dev == -1)
		{
			com_err (program_name, errno,
				 _("while trying to open %s"),
				 host_device_name);
			exit (1);
		}
	} else
		host_dev = dev;
	if (input_file)
		if (strcmp (input_file, "-") == 0)
			in = stdin;
		else {
			in = fopen (input_file, "r");
			if (in == NULL)
			{
				com_err (program_name, errno,
					 _("while trying to open %s"),
					 input_file);
				exit (1);
			}
		}
	if (output_file && strcmp (output_file, "-") != 0)
	{
		out = fopen (output_file, "w");
		if (out == NULL)
		{
			com_err (program_name, errno,
				 _("while trying to open %s"),
				 output_file);
			exit (1);
		}
	}
	else
		out = stdout;

	errcode = ext2fs_badblocks_list_create(&bb_list,0);
	if (errcode) {
		com_err (program_name, errcode,
			 _("creating in-memory bad blocks list"));
		exit (1);
	}

	if (in) {
		for(;;) {
			switch(fscanf (in, "%lu\n", &next_bad)) {
				case 0:
					com_err (program_name, 0, "input file - bad format");
					exit (1);
				case EOF:
					break;
				default:
					errcode = ext2fs_badblocks_list_add(bb_list,next_bad);
					if (errcode) {
						com_err (program_name, errcode, _("adding to in-memory bad block list"));
						exit (1);
					}
					continue;
			}
			break;
		}

		if (in != stdin)
			fclose (in);
	}

	do {
		unsigned int bb_count;

		(bb_count =

		(w_flag == 2 ? test_nd
		    : w_flag ? test_rw
		             : test_ro)
		                        (dev, blocks_count, block_size, from_count,
		                              blocks_at_once)
		)	? passes_clean = 0 : ++passes_clean;

		if (v_flag)
			fprintf(stderr,
				_("Pass completed, %u bad blocks found.\n"), 
				bb_count);

	} while (passes_clean < num_passes);

	close (dev);
	if (out != stdout)
		fclose (out);
	return 0;
}