GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/cdio/mmc.c Lines: 0 308 0.0 %
Date: 2017-11-13 Branches: 0 107 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: mmc.c,v 1.30 2015/01/16 06:40:06 deraadt Exp $	*/
2
/*
3
 * Copyright (c) 2006 Michael Coulter <mjc@openbsd.org>
4
 *
5
 * Permission to use, copy, modify, and distribute this software for any
6
 * purpose with or without fee is hereby granted, provided that the above
7
 * copyright notice and this permission notice appear in all copies.
8
 *
9
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16
 */
17
18
#include <sys/limits.h>
19
#include <sys/types.h>
20
#include <sys/scsiio.h>
21
#include <sys/param.h>	/* setbit, isset */
22
#include <scsi/cd.h>
23
#include <scsi/scsi_all.h>
24
#include <scsi/scsi_disk.h>
25
#include <err.h>
26
#include <errno.h>
27
#include <fcntl.h>
28
#include <stdio.h>
29
#include <string.h>
30
#include <unistd.h>
31
#include "extern.h"
32
33
extern int fd;
34
extern u_int8_t mediacap[];
35
extern char *cdname;
36
extern int verbose;
37
38
#define SCSI_GET_CONFIGURATION		0x46
39
40
#define MMC_FEATURE_HDR_LEN		8
41
42
static const struct {
43
	u_int16_t id;
44
	char *name;
45
} mmc_feature[] = {
46
	{ 0x0000, "Profile List" },
47
	{ 0x0001, "Core" },
48
	{ 0x0002, "Morphing" },
49
	{ 0x0003, "Removable Medium" },
50
	{ 0x0004, "Write Protect" },
51
	{ 0x0010, "Random Readable" },
52
	{ 0x001d, "Multi-Read" },
53
	{ 0x001e, "CD Read" },
54
	{ 0x001f, "DVD Read" },
55
	{ 0x0020, "Random Writable" },
56
	{ 0x0021, "Incremental Streaming Writable" },
57
	{ 0x0022, "Sector Erasable" },
58
	{ 0x0023, "Formattable" },
59
	{ 0x0024, "Hardware Defect Management" },
60
	{ 0x0025, "Write Once" },
61
	{ 0x0026, "Restricted Overwrite" },
62
	{ 0x0027, "CD-RW CAV Write" },
63
	{ 0x0028, "MRW" },
64
	{ 0x0029, "Enhanced Defect Reporting" },
65
	{ 0x002a, "DVD+RW" },
66
	{ 0x002b, "DVD+R" },
67
	{ 0x002c, "Rigid Restricted Overwrite" },
68
	{ 0x002d, "CD Track at Once (TAO)" },
69
	{ 0x002e, "CD Mastering (Session at Once)" },
70
	{ 0x002f, "DVD-RW Write" },
71
	{ 0x0030, "DDCD-ROM (Legacy)" },
72
	{ 0x0031, "DDCD-R (Legacy)" },
73
	{ 0x0032, "DDCD-RW (Legacy)" },
74
	{ 0x0033, "Layer Jump Recording" },
75
	{ 0x0037, "CD-RW Media Write Support" },
76
	{ 0x0038, "BD-R Pseudo-Overwrite (POW)" },
77
	{ 0x003a, "DVD+RW Dual Layer" },
78
	{ 0x003b, "DVD+R Dual Layer" },
79
	{ 0x0040, "BD Read" },
80
	{ 0x0041, "BD Write" },
81
	{ 0x0042, "Timely Safe Recording (TSR)" },
82
	{ 0x0050, "HD DVD Read" },
83
	{ 0x0051, "HD DVD Write" },
84
	{ 0x0080, "Hybrid Disc" },
85
	{ 0x0100, "Power Management" },
86
	{ 0x0101, "S.M.A.R.T." },
87
	{ 0x0102, "Embedded Changer" },
88
	{ 0x0103, "CD Audio External Play (Legacy)" },
89
	{ 0x0104, "Microcode Upgrade" },
90
	{ 0x0105, "Timeout" },
91
	{ 0x0106, "DVD CSS" },
92
	{ 0x0107, "Real Time Streaming" },
93
	{ 0x0108, "Drive Serial Number" },
94
	{ 0x0109, "Media Serial Number" },
95
	{ 0x010a, "Disc Control Blocks (DCBs)" },
96
	{ 0x010b, "DVD CPRM" },
97
	{ 0x010c, "Firmware Information" },
98
	{ 0x010d, "AACS" },
99
	{ 0x0110, "VCPS" },
100
	{ 0, NULL }
101
};
102
103
static const struct {
104
	u_int16_t id;
105
	char *name;
106
} mmc_profile[] = {
107
	{ 0x0001, "Re-writable disk, capable of changing behaviour" },
108
	{ 0x0002, "Re-writable, with removable media" },
109
	{ 0x0003, "Magneto-Optical disk with sector erase capability" },
110
	{ 0x0004, "Optical write once" },
111
	{ 0x0005, "Advance Storage -- Magneto-Optical" },
112
	{ 0x0008, "Read only Compact Disc" },
113
	{ 0x0009, "Write once Compact Disc" },
114
	{ 0x000a, "Re-writable Compact Disc" },
115
	{ 0x0010, "Read only DVD" },
116
	{ 0x0011, "Write once DVD using Sequential recording" },
117
	{ 0x0012, "Re-writable DVD" },
118
	{ 0x0013, "Re-recordable DVD using Restricted Overwrite" },
119
	{ 0x0014, "Re-recordable DVD using Sequential recording" },
120
	{ 0x0015, "Dual Layer DVD-R using Sequential recording" },
121
	{ 0x0016, "Dual Layer DVD-R using Layer Jump recording" },
122
	{ 0x001a, "DVD+ReWritable" },
123
	{ 0x001b, "DVD+Recordable" },
124
	{ 0x0020, "DDCD-ROM" },
125
	{ 0x0021, "DDCD-R" },
126
	{ 0x0022, "DDCD-RW" },
127
	{ 0x002a, "DVD+Rewritable Dual Layer" },
128
	{ 0x002b, "DVD+Recordable Dual Layer" },
129
	{ 0x003e, "Blu-ray Disc ROM" },
130
	{ 0x003f, "Blu-ray Disc Recordable -- Sequential Recording Mode" },
131
	{ 0x0040, "Blu-ray Disc Recordable -- Random Recording Mode" },
132
	{ 0x0041, "Blu-ray Disc Rewritable" },
133
	{ 0x004e, "Read-only HD DVD" },
134
	{ 0x004f, "Write-once HD DVD" },
135
	{ 0x0050, "Rewritable HD DVD" },
136
	{ 0, NULL }
137
};
138
139
int
140
get_media_type(void)
141
{
142
	scsireq_t scr;
143
	char buf[32];
144
	u_char disctype;
145
	int rv, error;
146
147
	rv = MEDIATYPE_UNKNOWN;
148
	memset(buf, 0, sizeof(buf));
149
	memset(&scr, 0, sizeof(scr));
150
151
	scr.cmd[0] = READ_TOC;
152
	scr.cmd[1] = 0x2;	/* MSF */
153
	scr.cmd[2] = 0x4;	/* ATIP */
154
	scr.cmd[8] = 0x20;
155
156
	scr.flags = SCCMD_ESCAPE | SCCMD_READ;
157
	scr.databuf = buf;
158
	scr.datalen = sizeof(buf);
159
	scr.cmdlen = 10;
160
	scr.timeout = 120000;
161
	scr.senselen = SENSEBUFLEN;
162
163
	error = ioctl(fd, SCIOCCOMMAND, &scr);
164
	if (error != -1 && scr.retsts == SCCMD_OK && scr.datalen_used > 7) {
165
		disctype = (buf[6] >> 6) & 0x1;
166
		if (disctype == 0)
167
			rv = MEDIATYPE_CDR;
168
		else if (disctype == 1)
169
			rv = MEDIATYPE_CDRW;
170
	}
171
172
	return (rv);
173
}
174
175
int
176
get_media_capabilities(u_int8_t *cap, int rt)
177
{
178
	scsireq_t scr;
179
	u_char buf[4096];
180
	u_int32_t i, dlen;
181
	u_int16_t feature, profile, tmp;
182
	u_int8_t feature_len;
183
	int current, error, j, k;
184
185
	memset(cap, 0, MMC_FEATURE_MAX / NBBY);
186
	memset(buf, 0, sizeof(buf));
187
	memset(&scr, 0, sizeof(scr));
188
189
	scr.cmd[0] = SCSI_GET_CONFIGURATION;
190
	scr.cmd[1] = rt;
191
	tmp = htobe16(sizeof(buf));
192
	memcpy(scr.cmd + 7, &tmp, sizeof(u_int16_t));
193
194
	scr.flags = SCCMD_ESCAPE | SCCMD_READ;
195
	scr.databuf = buf;
196
	scr.datalen = sizeof(buf);
197
	scr.cmdlen = 10;
198
	scr.timeout = 120000;
199
	scr.senselen = SENSEBUFLEN;
200
201
	error = ioctl(fd, SCIOCCOMMAND, &scr);
202
	if (error == -1 || scr.retsts != SCCMD_OK)
203
		return (-1);
204
	if (scr.datalen_used < MMC_FEATURE_HDR_LEN)
205
		return (-1);	/* Can't get the header. */
206
207
	/* Include the whole header in the length. */
208
	dlen = betoh32(*(u_int32_t *)buf) + 4;
209
	if (dlen > scr.datalen_used)
210
		dlen = scr.datalen_used;
211
212
	if (verbose > 1)
213
		printf("Features:\n");
214
	for (i = MMC_FEATURE_HDR_LEN; i + 3 < dlen; i += feature_len) {
215
		feature_len = buf[i + 3] + 4;
216
		if (feature_len + i > dlen)
217
			break;
218
219
		feature = betoh16(*(u_int16_t *)(buf + i));
220
		if (feature >= MMC_FEATURE_MAX)
221
			break;
222
223
		if (verbose > 1) {
224
			printf("0x%04x", feature);
225
			for (j = 0; mmc_feature[j].name != NULL; j++)
226
				if (feature == mmc_feature[j].id)
227
					break;
228
			if (mmc_feature[j].name == NULL)
229
				printf(" <Undocumented>");
230
			else
231
				printf(" %s", mmc_feature[j].name);
232
			if (feature_len > 4)
233
				printf(" (%d bytes of data)", feature_len - 4);
234
			printf("\n");
235
			if (verbose > 2) {
236
				printf("    ");
237
				for (j = i; j < i + feature_len; j++) {
238
					printf("%02x", buf[j]);
239
					if ((j + 1) == (i + feature_len))
240
						printf("\n");
241
					else if ((j > i) && ((j - i + 1) % 16
242
					    == 0))
243
						printf("\n    ");
244
					else if ((j - i) == 3)
245
						printf("|");
246
					else
247
						printf(" ");
248
				}
249
			}
250
		}
251
		if (feature == 0 && verbose > 1) {
252
			if (verbose > 2)
253
				printf("    Profiles:\n");
254
			for (j = i + 4; j < i + feature_len; j += 4) {
255
				profile = betoh16(*(u_int16_t *)(buf+j));
256
				current = buf[j+2] == 1;
257
				if (verbose < 3 && !current)
258
					continue;
259
				if (current)
260
					printf("  * ");
261
				else
262
					printf("    ");
263
				printf("0x%04x", profile);
264
				for (k = 0; mmc_profile[k].name != NULL; k++)
265
					if (profile == mmc_profile[k].id)
266
						break;
267
				if (mmc_profile[k].name == NULL)
268
					printf(" <Undocumented>");
269
				else
270
					printf(" %s", mmc_profile[k].name);
271
				printf(" %s\n", current ? "[Current Profile]" :
272
				    "" );
273
			}
274
		}
275
		setbit(cap, feature);
276
	}
277
278
	return (0);
279
}
280
281
static int
282
set_speed(int wspeed)
283
{
284
	scsireq_t scr;
285
	int r;
286
287
	memset(&scr, 0, sizeof(scr));
288
	scr.cmd[0] = SET_CD_SPEED;
289
	scr.cmd[1] = (isset(mediacap, MMC_FEATURE_CDRW_CAV)) != 0;
290
	*(u_int16_t *)(scr.cmd + 2) = htobe16(DRIVE_SPEED_OPTIMAL);
291
	*(u_int16_t *)(scr.cmd + 4) = htobe16(wspeed);
292
293
	scr.cmdlen = 12;
294
	scr.datalen = 0;
295
	scr.timeout = 120000;
296
	scr.flags = SCCMD_ESCAPE;
297
	scr.senselen = SENSEBUFLEN;
298
299
	r = ioctl(fd, SCIOCCOMMAND, &scr);
300
	return (r == 0 ? scr.retsts : -1);
301
}
302
303
int
304
blank(void)
305
{
306
	struct scsi_blank *scb;
307
	scsireq_t scr;
308
	int r;
309
310
	bzero(&scr, sizeof(scr));
311
	scb = (struct scsi_blank *)scr.cmd;
312
	scb->opcode = BLANK;
313
	scb->byte2 |= BLANK_MINIMAL;
314
	scr.cmdlen = sizeof(*scb);
315
	scr.datalen = 0;
316
	scr.timeout = 120000;
317
	scr.flags = SCCMD_ESCAPE;
318
	scr.senselen = SENSEBUFLEN;
319
320
	r = ioctl(fd, SCIOCCOMMAND, &scr);
321
	return (r == 0 ? scr.retsts : -1);
322
}
323
324
int
325
unit_ready(void)
326
{
327
	struct scsi_test_unit_ready *scb;
328
	scsireq_t scr;
329
	int r;
330
331
	bzero(&scr, sizeof(scr));
332
	scb = (struct scsi_test_unit_ready *)scr.cmd;
333
	scb->opcode = TEST_UNIT_READY;
334
	scr.cmdlen = sizeof(*scb);
335
	scr.datalen = 0;
336
	scr.timeout = 120000;
337
	scr.flags = SCCMD_ESCAPE;
338
	scr.senselen = SENSEBUFLEN;
339
340
	r = ioctl(fd, SCIOCCOMMAND, &scr);
341
	return (r == 0 ? scr.retsts : -1);
342
}
343
344
int
345
synchronize_cache(void)
346
{
347
	struct scsi_synchronize_cache *scb;
348
	scsireq_t scr;
349
	int r;
350
351
	bzero(&scr, sizeof(scr));
352
	scb = (struct scsi_synchronize_cache *)scr.cmd;
353
	scb->opcode = SYNCHRONIZE_CACHE;
354
	scr.cmdlen = sizeof(*scb);
355
	scr.datalen = 0;
356
	scr.timeout = 120000;
357
	scr.flags = SCCMD_ESCAPE;
358
	scr.senselen = SENSEBUFLEN;
359
360
	r = ioctl(fd, SCIOCCOMMAND, &scr);
361
	return (r == 0 ? scr.retsts : -1);
362
}
363
364
int
365
close_session(void)
366
{
367
	struct scsi_close_track *scb;
368
	scsireq_t scr;
369
	int r;
370
371
	bzero(&scr, sizeof(scr));
372
	scb = (struct scsi_close_track *)scr.cmd;
373
	scb->opcode = CLOSE_TRACK;
374
	scb->closefunc = CT_CLOSE_SESS;
375
	scr.cmdlen = sizeof(*scb);
376
	scr.datalen = 0;
377
	scr.timeout = 120000;
378
	scr.flags = SCCMD_ESCAPE;
379
	scr.senselen = SENSEBUFLEN;
380
381
	r = ioctl(fd, SCIOCCOMMAND, &scr);
382
	return (r == 0 ? scr.retsts : -1);
383
}
384
385
int
386
writetao(struct track_head *thp)
387
{
388
	u_char modebuf[70], bdlen;
389
	struct track_info *tr;
390
	int r, track = 0;
391
392
	if ((r = mode_sense_write(modebuf)) != SCCMD_OK) {
393
		warnx("mode sense failed: %d", r);
394
		return (r);
395
	}
396
	bdlen = modebuf[7];
397
	modebuf[2+8+bdlen] |= 0x40; /* Buffer Underrun Free Enable */
398
	modebuf[2+8+bdlen] |= 0x01; /* change write type to TAO */
399
400
	SLIST_FOREACH(tr, thp, track_list) {
401
		track++;
402
		switch (tr->type) {
403
		case 'd':
404
			modebuf[3+8+bdlen] = 0x04; /* track mode = data */
405
			modebuf[4+8+bdlen] = 0x08; /* 2048 block track mode */
406
			modebuf[8+8+bdlen] = 0x00; /* turn off XA */
407
			break;
408
		case 'a':
409
			modebuf[3+8+bdlen] = 0x00; /* track mode = audio */
410
			modebuf[4+8+bdlen] = 0x00; /* 2352 block track mode */
411
			modebuf[8+8+bdlen] = 0x00; /* turn off XA */
412
			break;
413
		default:
414
			warn("impossible tracktype detected");
415
			break;
416
		}
417
		while (unit_ready() != SCCMD_OK)
418
			continue;
419
		if ((r = mode_select_write(modebuf)) != SCCMD_OK) {
420
			warnx("mode select failed: %d", r);
421
			return (r);
422
		}
423
424
		set_speed(tr->speed);
425
		writetrack(tr, track);
426
		synchronize_cache();
427
	}
428
	fprintf(stderr, "Closing session.\n");
429
	close_session();
430
	return (0);
431
}
432
433
int
434
writetrack(struct track_info *tr, int track)
435
{
436
	struct timeval tv, otv, atv;
437
	u_char databuf[65536], nblk;
438
	u_int end_lba, lba, tmp;
439
	scsireq_t scr;
440
	int r;
441
442
	nblk = 65535/tr->blklen;
443
	bzero(&scr, sizeof(scr));
444
	scr.timeout = 300000;
445
	scr.cmd[0] = WRITE_BIG;
446
	scr.cmd[1] = 0x00;
447
	scr.cmd[8] = nblk; /* Transfer length in blocks (LSB) */
448
	scr.cmdlen = 10;
449
	scr.databuf = (caddr_t)databuf;
450
	scr.datalen = nblk * tr->blklen;
451
	scr.senselen = SENSEBUFLEN;
452
	scr.flags = SCCMD_ESCAPE|SCCMD_WRITE;
453
454
	timerclear(&otv);
455
	atv.tv_sec = 1;
456
	atv.tv_usec = 0;
457
458
	if (get_nwa(&lba) != SCCMD_OK) {
459
		warnx("cannot get next writable address");
460
		return (-1);
461
	}
462
	tmp = htobe32(lba); /* update lba in cdb */
463
	memcpy(&scr.cmd[2], &tmp, sizeof(tmp));
464
465
	if (tr->sz / tr->blklen + 1 > UINT_MAX || tr->sz < tr->blklen) {
466
		warnx("file %s has invalid size", tr->file);
467
		return (-1);
468
	}
469
	if (tr->sz % tr->blklen) {
470
		warnx("file %s is not multiple of block length %d",
471
		    tr->file, tr->blklen);
472
		end_lba = tr->sz / tr->blklen + lba + 1;
473
	} else {
474
		end_lba = tr->sz / tr->blklen + lba;
475
	}
476
	if (lseek(tr->fd, tr->off, SEEK_SET) == -1)
477
		err(1, "seek failed for file %s", tr->file);
478
	while (lba < end_lba && nblk != 0) {
479
		while (lba + nblk <= end_lba) {
480
			read(tr->fd, databuf, nblk * tr->blklen);
481
			scr.cmd[8] = nblk;
482
			scr.datalen = nblk * tr->blklen;
483
again:
484
			r = ioctl(fd, SCIOCCOMMAND, &scr);
485
			if (r != 0) {
486
				printf("\r%60s", "");
487
				warn("ioctl failed while attempting to write");
488
				return (-1);
489
			}
490
			if (scr.retsts == SCCMD_SENSE && scr.sense[2] == 0x2) {
491
				usleep(1000);
492
				goto again;
493
			}
494
			if (scr.retsts != SCCMD_OK) {
495
				printf("\r%60s", "");
496
				warnx("ioctl returned bad status while "
497
				    "attempting to write: %d",
498
				    scr.retsts);
499
				return (r);
500
			}
501
			lba += nblk;
502
503
			gettimeofday(&tv, NULL);
504
			if (lba == end_lba || timercmp(&tv, &otv, >)) {
505
				fprintf(stderr,
506
				    "\rtrack %02d '%c' %08u/%08u %3d%%",
507
				    track, tr->type,
508
				    lba, end_lba, 100 * lba / end_lba);
509
				timeradd(&tv, &atv, &otv);
510
			}
511
			tmp = htobe32(lba); /* update lba in cdb */
512
			memcpy(&scr.cmd[2], &tmp, sizeof(tmp));
513
		}
514
		nblk--;
515
	}
516
	printf("\n");
517
	close(tr->fd);
518
	return (0);
519
}
520
521
int
522
mode_sense_write(unsigned char buf[])
523
{
524
	struct scsi_mode_sense_big *scb;
525
	scsireq_t scr;
526
	int r;
527
528
	bzero(&scr, sizeof(scr));
529
	scb = (struct scsi_mode_sense_big *)scr.cmd;
530
	scb->opcode = MODE_SENSE_BIG;
531
	/* XXX: need to set disable block descriptors and check SCSI drive */
532
	scb->page = WRITE_PARAM_PAGE;
533
	scb->length[1] = 0x46; /* 16 for the header + size from pg. 89 mmc-r10a.pdf */
534
	scr.cmdlen = sizeof(*scb);
535
	scr.timeout = 4000;
536
	scr.senselen = SENSEBUFLEN;
537
	scr.datalen= 0x46;
538
	scr.flags = SCCMD_ESCAPE|SCCMD_READ;
539
	scr.databuf = (caddr_t)buf;
540
541
	r = ioctl(fd, SCIOCCOMMAND, &scr);
542
	return (r == 0 ? scr.retsts : -1);
543
}
544
545
int
546
mode_select_write(unsigned char buf[])
547
{
548
	struct scsi_mode_select_big *scb;
549
	scsireq_t scr;
550
	int r;
551
552
	bzero(&scr, sizeof(scr));
553
	scb = (struct scsi_mode_select_big *)scr.cmd;
554
	scb->opcode = MODE_SELECT_BIG;
555
556
	/*
557
	 * INF-8020 says bit 4 in byte 2 is '1'
558
	 * INF-8090 refers to it as 'PF(1)' then doesn't
559
	 * describe it.
560
	 */
561
	scb->byte2 = 0x10;
562
	scb->length[1] = 2 + buf[1] + 256 * buf[0];
563
	scr.timeout = 4000;
564
	scr.senselen = SENSEBUFLEN;
565
	scr.cmdlen = sizeof(*scb);
566
	scr.datalen = 2 + buf[1] + 256 * buf[0];
567
	scr.flags = SCCMD_ESCAPE|SCCMD_WRITE;
568
	scr.databuf = (caddr_t)buf;
569
570
	r = ioctl(fd, SCIOCCOMMAND, &scr);
571
	return (r == 0 ? scr.retsts : -1);
572
}
573
574
int
575
get_disc_size(off_t *availblk)
576
{
577
	u_char databuf[28];
578
	struct scsi_read_track_info *scb;
579
	scsireq_t scr;
580
	int r, tmp;
581
582
	bzero(&scr, sizeof(scr));
583
	scb = (struct scsi_read_track_info *)scr.cmd;
584
	scr.timeout = 4000;
585
	scr.senselen = SENSEBUFLEN;
586
	scb->opcode = READ_TRACK_INFO;
587
	scb->addrtype = RTI_TRACK;
588
	scb->addr[3] = 1;
589
	scb->data_len[1] = 0x1c;
590
	scr.cmdlen = sizeof(*scb);
591
	scr.datalen= 0x1c;
592
	scr.flags = SCCMD_ESCAPE|SCCMD_READ;
593
	scr.databuf = (caddr_t)databuf;
594
595
	r = ioctl(fd, SCIOCCOMMAND, &scr);
596
	memcpy(&tmp, &databuf[16], sizeof(tmp));
597
	*availblk = betoh32(tmp);
598
	return (r == 0 ? scr.retsts : -1);
599
}
600
601
int
602
get_nwa(int *nwa)
603
{
604
	u_char databuf[28];
605
	scsireq_t scr;
606
	int r, tmp;
607
608
	bzero(&scr, sizeof(scr));
609
	scr.timeout = 4000;
610
	scr.senselen = SENSEBUFLEN;
611
	scr.cmd[0] = READ_TRACK_INFO;
612
	scr.cmd[1] = 0x01;
613
	scr.cmd[5] = 0xff; /* Invisible Track */
614
	scr.cmd[7] = 0x00;
615
	scr.cmd[8] = 0x1c;
616
	scr.cmdlen = 10;
617
	scr.datalen= 0x1c;
618
	scr.flags = SCCMD_ESCAPE|SCCMD_READ;
619
	scr.databuf = (caddr_t)databuf;
620
621
	r = ioctl(fd, SCIOCCOMMAND, &scr);
622
	memcpy(&tmp, &databuf[12], sizeof(tmp));
623
	*nwa = betoh32(tmp);
624
	return (r == 0 ? scr.retsts : -1);
625
}