summaryrefslogtreecommitdiff
path: root/extras/scsi_id/scsi_id.c
blob: 463b3775cf6dcf2dea7ddffdc814f464fd377090 (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
/*
 * scsi_id.c
 *
 * Main section of the scsi_id program
 *
 * Copyright (C) IBM Corp. 2003
 * Copyright (C) SUSE Linux Products GmbH, 2006
 *
 * Author:
 *	Patrick Mansfield<patmans@us.ibm.com>
 *
 *	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 version 2 of the License.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <syslog.h>
#include <stdarg.h>
#include <ctype.h>
#include <getopt.h>
#include <sys/stat.h>

#include "../../udev.h"
#include "scsi_id.h"
#include "scsi_id_version.h"

/* temporary names for mknod  */
#define TMP_DIR		"/dev"
#define TMP_PREFIX	"tmp-scsi"

static const struct option options[] = {
	{ "device", 1, NULL, 'd' },
	{ "config", 1, NULL, 'f' },
	{ "page", 1, NULL, 'p' },
	{ "devpath", 1, NULL, 's' },
	{ "fallback-to-sysfs", 0, NULL, 'a' },
	{ "blacklisted", 0, NULL, 'b' },
	{ "whitelisted", 0, NULL, 'g' },
	{ "prefix-bus-id", 0, NULL, 'i' },
	{ "replace-whitespace", 0, NULL, 'u' },
	{ "ignore-sysfs", 0, NULL, 'n' },
	{ "verbose", 0, NULL, 'v' },
	{ "version", 0, NULL, 'V' },
	{ "export", 0, NULL, 'x' },
	{ "help", 0, NULL, 'h' },
	{}
};

static const char short_options[] = "abd:f:ghinp:s:uvVx";
static const char dev_short_options[] = "bgp:";

static int all_good;
static int always_info;
static int dev_specified;
static int sys_specified;
static char config_file[MAX_PATH_LEN] = SCSI_ID_CONFIG_FILE;
static int display_bus_id;
static enum page_code default_page_code;
static int use_stderr;
static int debug;
static int hotplug_mode;
static int reformat_serial;
static int ignore_sysfs;
static int export;
static char vendor_str[64];
static char model_str[64];
static char revision_str[16];
static char type_str[16];

#ifdef USE_LOG
void log_message(int priority, const char *format, ...)
{
	va_list args;
	static int udev_log = -1;

	if (udev_log == -1) {
		const char *value;

		value = getenv("UDEV_LOG");
		if (value)
			udev_log = log_priority(value);
		else
			udev_log = LOG_ERR;
	}

	if (priority > udev_log)
		return;

	va_start(args, format);
	vsyslog(priority, format, args);
	va_end(args);
}
#endif

static void set_str(char *to, const char *from, size_t count)
{
	size_t i, j, len;

	/* strip trailing whitespace */
	len = strnlen(from, count);
	while (len && isspace(from[len-1]))
		len--;

	/* strip leading whitespace */
	i = 0;
	while (isspace(from[i]) && (i < len))
		i++;

	j = 0;
	while (i < len) {
		/* substitute multiple whitespace */
		if (isspace(from[i])) {
			while (isspace(from[i]))
				i++;
			to[j++] = '_';
		}
		/* skip chars */
		if (from[i] == '/') {
			i++;
			continue;
		}
		to[j++] = from[i++];
	}
	to[j] = '\0';
}

static void set_type(char *to, const char *from, size_t len)
{
	int type_num;
	char *eptr;
	char *type = "generic";

	type_num = strtoul(from, &eptr, 0);
	if (eptr != from) {
		switch (type_num) {
		case 0:
			type = "disk";
			break;
		case 1:
			type = "tape";
			break;
		case 4:
			type = "optical";
			break;
		case 5:
			type = "cd";
			break;
		case 7:
			type = "optical";
			break;
		case 0xe:
			type = "disk";
			break;
		case 0xf:
			type = "optical";
			break;
		default:
			break;
		}
	}
	strncpy(to, type, len);
	to[len-1] = '\0';
}

static int create_tmp_dev(const char *devpath, char *tmpdev, int dev_type)
{
	unsigned int maj, min;
	const char *attr;

	dbg("%s\n", devpath);
	attr = sysfs_attr_get_value(devpath, "dev");
	if (attr == NULL) {
		dbg("%s: could not get dev attribute: %s\n", devpath, strerror(errno));
		return -1;
	}

	dbg("dev value %s\n", attr);
	if (sscanf(attr, "%u:%u", &maj, &min) != 2) {
		err("%s: invalid dev major/minor\n", devpath);
		return -1;
	}

	snprintf(tmpdev, MAX_PATH_LEN, "%s/%s-maj%d-min%d-%u",
		 TMP_DIR, TMP_PREFIX, maj, min, getpid());

	dbg("tmpdev '%s'\n", tmpdev);
	if (mknod(tmpdev, 0600 | dev_type, makedev(maj, min))) {
		err("mknod failed: %s\n", strerror(errno));
		return -1;
	}
	return 0;
}

/*
 * get_value:
 *
 * buf points to an '=' followed by a quoted string ("foo") or a string ending
 * with a space or ','.
 *
 * Return a pointer to the NUL terminated string, returns NULL if no
 * matches.
 */
static char *get_value(char **buffer)
{
	static char *quote_string = "\"\n";
	static char *comma_string = ",\n";
	char *val;
	char *end;

	if (**buffer == '"') {
		/*
		 * skip leading quote, terminate when quote seen
		 */
		(*buffer)++;
		end = quote_string;
	} else {
		end = comma_string;
	}
	val = strsep(buffer, end);
	if (val && end == quote_string)
		/*
		 * skip trailing quote
		 */
		(*buffer)++;

	while (isspace(**buffer))
		(*buffer)++;

	return val;
}

static int argc_count(char *opts)
{
	int i = 0;
	while (*opts != '\0')
		if (*opts++ == ' ')
			i++;
	return i;
}

/*
 * get_file_options:
 *
 * If vendor == NULL, find a line in the config file with only "OPTIONS=";
 * if vendor and model are set find the first OPTIONS line in the config
 * file that matches. Set argc and argv to match the OPTIONS string.
 *
 * vendor and model can end in '\n'.
 */
static int get_file_options(const char *vendor, const char *model,
			    int *argc, char ***newargv)
{
	char *buffer;
	FILE *fd;
	char *buf;
	char *str1;
	char *vendor_in, *model_in, *options_in; /* read in from file */
	int lineno;
	int c;
	int retval = 0;

	dbg("vendor='%s'; model='%s'\n", vendor, model);
	fd = fopen(config_file, "r");
	if (fd == NULL) {
		dbg("can't open %s\n", config_file);
		if (errno == ENOENT) {
			return 1;
		} else {
			err("can't open %s: %s\n", config_file, strerror(errno));
			return -1;
		}
	}

	/*
	 * Allocate a buffer rather than put it on the stack so we can
	 * keep it around to parse any options (any allocated newargv
	 * points into this buffer for its strings).
	 */
	buffer = malloc(MAX_BUFFER_LEN);
	if (!buffer) {
		err("can't allocate memory\n");
		return -1;
	}

	*newargv = NULL;
	lineno = 0;
	while (1) {
		vendor_in = model_in = options_in = NULL;

		buf = fgets(buffer, MAX_BUFFER_LEN, fd);
		if (buf == NULL)
			break;
		lineno++;
		if (buf[strlen(buffer) - 1] != '\n') {
			info("Config file line %d too long\n", lineno);
			break;
		}

		while (isspace(*buf))
			buf++;

		/* blank or all whitespace line */
		if (*buf == '\0')
			continue;

		/* comment line */
		if (*buf == '#')
			continue;

		dbg("lineno %d: '%s'\n", lineno, buf);
		str1 = strsep(&buf, "=");
		if (str1 && strcasecmp(str1, "VENDOR") == 0) {
			str1 = get_value(&buf);
			if (!str1) {
				retval = -1;
				break;
			}
			vendor_in = str1;

			str1 = strsep(&buf, "=");
			if (str1 && strcasecmp(str1, "MODEL") == 0) {
				str1 = get_value(&buf);
				if (!str1) {
					retval = -1;
					break;
				}
				model_in = str1;
				str1 = strsep(&buf, "=");
			}
		}

		if (str1 && strcasecmp(str1, "OPTIONS") == 0) {
			str1 = get_value(&buf);
			if (!str1) {
				retval = -1;
				break;
			}
			options_in = str1;
		}
		dbg("config file line %d:\n"
			" vendor '%s'; model '%s'; options '%s'\n",
			lineno, vendor_in, model_in, options_in);
		/*
		 * Only allow: [vendor=foo[,model=bar]]options=stuff
		 */
		if (!options_in || (!vendor_in && model_in)) {
			info("Error parsing config file line %d '%s'\n", lineno, buffer);
			retval = -1;
			break;
		}
		if (vendor == NULL) {
			if (vendor_in == NULL) {
				dbg("matched global option\n");
				break;
			}
		} else if ((vendor_in && strncmp(vendor, vendor_in,
						 strlen(vendor_in)) == 0) &&
			   (!model_in || (strncmp(model, model_in,
						  strlen(model_in)) == 0))) {
				/*
				 * Matched vendor and optionally model.
				 *
				 * Note: a short vendor_in or model_in can
				 * give a partial match (that is FOO
				 * matches FOOBAR).
				 */
				dbg("matched vendor/model\n");
				break;
		} else {
			dbg("no match\n");
		}
	}

	if (retval == 0) {
		if (vendor_in != NULL || model_in != NULL ||
		    options_in != NULL) {
			/*
			 * Something matched. Allocate newargv, and store
			 * values found in options_in.
			 */
			strcpy(buffer, options_in);
			c = argc_count(buffer) + 2;
			*newargv = calloc(c, sizeof(**newargv));
			if (!*newargv) {
				err("can't allocate memory\n");
				retval = -1;
			} else {
				*argc = c;
				c = 0;
				/*
				 * argv[0] at 0 is skipped by getopt, but
				 * store the buffer address there for
				 * later freeing
				 */
				(*newargv)[c] = buffer;
				for (c = 1; c < *argc; c++)
					(*newargv)[c] = strsep(&buffer, " \t");
			}
		} else {
			/* No matches  */
			retval = 1;
		}
	}
	if (retval != 0)
		free(buffer);
	fclose(fd);
	return retval;
}

static int set_options(int argc, char **argv, const char *short_opts,
		       char *target, char *maj_min_dev)
{
	int option;

	/*
	 * optind is a global extern used by getopt. Since we can call
	 * set_options twice (once for command line, and once for config
	 * file) we have to reset this back to 1.
	 */
	optind = 1;
	while (1) {
		option = getopt_long(argc, argv, short_opts, options, NULL);
		if (option == -1)
			break;

		if (optarg)
			dbg("option '%c' arg '%s'\n", option, optarg);
		else
			dbg("option '%c'\n", option);

		switch (option) {
		case 'a':
			always_info = 1;
			break;
		case 'b':
			all_good = 0;
			break;

		case 'd':
			dev_specified = 1;
			strncpy(maj_min_dev, optarg, MAX_PATH_LEN);
			maj_min_dev[MAX_PATH_LEN-1] = '\0';
			break;

		case 'e':
			use_stderr = 1;
			break;

		case 'f':
			strncpy(config_file, optarg, MAX_PATH_LEN);
			config_file[MAX_PATH_LEN-1] = '\0';
			break;

		case 'g':
			all_good = 1;
			break;

		case 'h':
			printf("Usage: scsi_id OPTIONS <device>\n"
			       "  --device               device node for SG_IO commands\n"
			       "  --devpath              sysfs devpath\n"
			       "  --config               location of config file\n"
			       "  --page                 SCSI page (0x80, 0x83, pre-spc3-83)\n"
			       "  --fallback-to-sysfs    print sysfs values if inquiry fails\n"
			       "  --ignore-sysfs         ignore sysfs entries\n"
			       "  --blacklisted          threat device as blacklisted\n"
			       "  --whitelisted          threat device as whitelisted\n"
			       "  --prefix-bus-id        prefix SCSI bus id\n"
			       "  --replace-whitespace   replace all whitespaces by underscores\n"
			       "  --verbose              verbose logging\n"
			       "  --version              print version\n"
			       "  --export               print values as environment keys\n"
			       "  --help                 print this help text\n\n");
			exit(0);

		case 'i':
			display_bus_id = 1;
			break;

		case 'p':
			if (strcmp(optarg, "0x80") == 0) {
				default_page_code = PAGE_80;
			} else if (strcmp(optarg, "0x83") == 0) {
				default_page_code = PAGE_83;
			} else if (strcmp(optarg, "pre-spc3-83") == 0) {
				default_page_code = PAGE_83_PRE_SPC3; 
			} else {
				info("Unknown page code '%s'\n", optarg);
				return -1;
			}
			break;

		case 'n':
			ignore_sysfs = 1;
			break;

		case 's':
			sys_specified = 1;
			strncpy(target, optarg, MAX_PATH_LEN);
			target[MAX_PATH_LEN-1] = '\0';
			break;

		case 'u':
			reformat_serial = 1;
			break;

		case 'x':
			export = 1;
			break;

		case 'v':
			debug++;
			break;

		case 'V':
			printf("%s\n", SCSI_ID_VERSION);
			exit(0);
			break;

		default:
			exit(1);
		}
	}
	return 0;
}

static int per_dev_options(struct sysfs_device *dev_scsi, int *good_bad, int *page_code)
{
	int retval;
	int newargc;
	char **newargv = NULL;
	int option;

	*good_bad = all_good;
	*page_code = default_page_code;

	retval = get_file_options(vendor_str, model_str, &newargc, &newargv);

	optind = 1; /* reset this global extern */
	while (retval == 0) {
		option = getopt_long(newargc, newargv, dev_short_options, options, NULL);
		if (option == -1)
			break;

		if (optarg)
			dbg("option '%c' arg '%s'\n", option, optarg);
		else
			dbg("option '%c'\n", option);

		switch (option) {
		case 'b':
			*good_bad = 0;
			break;

		case 'g':
			*good_bad = 1;
			break;

		case 'p':
			if (strcmp(optarg, "0x80") == 0) {
				*page_code = PAGE_80;
			} else if (strcmp(optarg, "0x83") == 0) {
				*page_code = PAGE_83;
			} else if (strcmp(optarg, "pre-spc3-83") == 0) {
				*page_code = PAGE_83_PRE_SPC3; 
			} else {
				info("Unknown page code '%s'\n", optarg);
				retval = -1;
			}
			break;

		default:
			info("Unknown or bad option '%c' (0x%x)\n", option, option);
			retval = -1;
			break;
		}
	}

	if (newargv) {
		free(newargv[0]);
		free(newargv);
	}
	return retval;
}

static int set_sysfs_values(struct sysfs_device *dev_scsi)
{
	const char *vendor, *model, *type;

	vendor = sysfs_attr_get_value(dev_scsi->devpath, "vendor");
	if (!vendor) {
		info("%s: cannot get vendor attribute\n", dev_scsi->devpath);
		return -1;
	}
	set_str(vendor_str, vendor, sizeof(vendor_str)-1);

	model = sysfs_attr_get_value(dev_scsi->devpath, "model");
	if (!model) {
		info("%s: cannot get model attribute\n", dev_scsi->devpath);
		return -1;
	}
	set_str(model_str, model, sizeof(model_str)-1);

	type = sysfs_attr_get_value(dev_scsi->devpath, "type");
	if (!type) {
		info("%s: cannot get type attribute\n", dev_scsi->devpath);
		return -1;
	}
	set_type(type_str, type, sizeof(type_str));

	type = sysfs_attr_get_value(dev_scsi->devpath, "rev");
	if (!type) {
		info("%s: cannot get type attribute\n", dev_scsi->devpath);
		return -1;
	}
	set_str(revision_str, type, sizeof(revision_str)-1);

	return 0;
}

static int set_inq_values(struct sysfs_device *dev_scsi, const char *path)
{
	int retval;
	char vendor[8], model[16], type[4], rev[4];

	retval = scsi_std_inquiry(dev_scsi, path, vendor, model, rev, type);
	if (retval)
	    return retval;

	set_str(vendor_str, vendor, 8);
	set_str(model_str, model, 16);
	set_type(type_str, type, sizeof(type_str) - 1);
	set_str(revision_str, rev, sizeof(revision_str) -1);

	return 0;
}

/*
 * format_serial: replace to whitespaces by underscores for calling
 * programs that use the serial for device naming (multipath, Suse
 * naming, etc...)
 */
static void format_serial(char *serial)
{
	char *p = serial, *q;

	q = p;
	while (*p != '\0') {
		if (isspace(*p)) {
			if (q > serial && q[-1] != '_') {
				*q = '_';
				q++;
			}
		} else {
			*q = *p;
			q++;
		}
		p++;
	}
	*q = '\0';
}

/*
 * scsi_id: try to get an id, if one is found, printf it to stdout.
 * returns a value passed to exit() - 0 if printed an id, else 1. This
 * could be expanded, for example, if we want to report a failure like no
 * memory etc. return 2, and return 1 for expected cases (like broken
 * device found) that do not print an id.
 */
static int scsi_id(const char *devpath, char *maj_min_dev)
{
	int retval;
	int dev_type = 0;
	struct sysfs_device *dev;
	struct sysfs_device *dev_scsi = NULL;
	int good_dev;
	int page_code;
	char serial[MAX_SERIAL_LEN];
	char serial_short[MAX_SERIAL_LEN];
	const char *bus_str = NULL;

	dbg("devpath %s\n", devpath);

	dev = sysfs_device_get(devpath);
	if (dev == NULL) {
		err("unable to access '%s'\n", devpath);
		return 1;
	}

	if (strcmp(dev->subsystem, "block") == 0)
		dev_type = S_IFBLK;
	else
		dev_type = S_IFCHR;

	/* mknod a temp dev to communicate with the device */
	if (!dev_specified && create_tmp_dev(dev->devpath, maj_min_dev, dev_type)) {
		dbg("create_tmp_dev failed\n");
		return 1;
	}

	if (!ignore_sysfs) {
		/* get scsi parent device */
		dev_scsi = sysfs_device_get_parent_with_subsystem(dev, "scsi");
		if (dev_scsi == NULL) {
			err("unable to access parent device of '%s'\n", devpath);
			return 1;
		}
		set_sysfs_values(dev_scsi);
		bus_str = "scsi";
	} else {
		dev_scsi = dev;
		set_inq_values(dev_scsi, maj_min_dev);
	}

	/* get per device (vendor + model) options from the config file */
	retval = per_dev_options(dev_scsi, &good_dev, &page_code);
	dbg("per dev options: good %d; page code 0x%x\n", good_dev, page_code);

	if (!good_dev) {
		retval = 1;
	} else if (scsi_get_serial(dev_scsi, maj_min_dev, page_code,
				   serial, serial_short, MAX_SERIAL_LEN)) {
		retval = always_info?0:1;
	} else {
		retval = 0;
	}
	if (!retval) {
		if (export) {
			char serial_str[MAX_SERIAL_LEN];

			printf("ID_VENDOR=%s\n", vendor_str);
			printf("ID_MODEL=%s\n", model_str);
			printf("ID_REVISION=%s\n", revision_str);
			set_str(serial_str, serial, sizeof(serial_str));
			printf("ID_SERIAL=%s\n", serial_str);
			set_str(serial_str, serial_short, sizeof(serial_str));
			printf("ID_SERIAL_SHORT=%s\n", serial_str);
			printf("ID_TYPE=%s\n", type_str);
			if (bus_str != NULL)
				printf("ID_BUS=%s\n", bus_str);
		} else {
			if (reformat_serial)
				format_serial(serial);
			if (display_bus_id)
				printf("%s: ", dev_scsi->kernel);
			printf("%s\n", serial);
		}
		dbg("%s\n", serial);
		retval = 0;
	}

	if (!dev_specified)
		unlink(maj_min_dev);

	return retval;
}

int main(int argc, char **argv)
{
	int retval = 0;
	char devpath[MAX_PATH_LEN];
	char maj_min_dev[MAX_PATH_LEN];
	int newargc;
	const char *env;
	char **newargv;

	logging_init("scsi_id");
	sysfs_init();
	dbg("argc is %d\n", argc);

	/* sysfs path can be overridden for testing */
	env = getenv("SYSFS_PATH");
	if (env) {
		strncpy(sysfs_path, env, sizeof(sysfs_path));
		sysfs_path[sizeof(sysfs_path)-1] = '\0';
	} else
		strcpy(sysfs_path, "/sys");

	env = getenv("DEVPATH");
	if (env) {
		hotplug_mode = 1;
		sys_specified = 1;
		strncpy(devpath, env, MAX_PATH_LEN);
		devpath[sizeof(devpath)-1] = '\0';
	}

	/*
	 * Get config file options.
	 */
	newargv = NULL;
	retval = get_file_options(NULL, NULL, &newargc, &newargv);
	if (retval < 0) {
		retval = 1;
		goto exit;
	}
	if (newargv && (retval == 0)) {
		if (set_options(newargc, newargv, short_options, devpath,
				maj_min_dev) < 0) {
			retval = 2;
			goto exit;
		}
		free(newargv);
	}

	/*
	 * Get command line options (overriding any config file or DEVPATH
	 * settings).
	 */
	if (set_options(argc, argv, short_options, devpath, maj_min_dev) < 0)
		exit(1);

	if (!sys_specified) {
		info("--devpath=<path> must be specified\n");
		retval = 1;
		goto exit;
	}

	retval = scsi_id(devpath, maj_min_dev);

exit:
	sysfs_cleanup();
	logging_close();
	return retval;
}