summaryrefslogtreecommitdiffstats
path: root/src/udev/scsi_id/scsi_id.c
blob: 364d5677051248f0f3b7d7cad89f65f1937d2417 (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
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright © IBM Corp. 2003
 * Copyright © SUSE Linux Products GmbH, 2006
 */

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

#include "alloc-util.h"
#include "device-nodes.h"
#include "extract-word.h"
#include "fd-util.h"
#include "fileio.h"
#include "parse-util.h"
#include "scsi_id.h"
#include "string-util.h"
#include "strv.h"
#include "strxcpyx.h"
#include "udev-util.h"
#include "version.h"

static const struct option options[] = {
        { "device",             required_argument, NULL, 'd' },
        { "config",             required_argument, NULL, 'f' },
        { "page",               required_argument, NULL, 'p' },
        { "blacklisted",        no_argument,       NULL, 'b' },
        { "whitelisted",        no_argument,       NULL, 'g' },
        { "replace-whitespace", no_argument,       NULL, 'u' },
        { "sg-version",         required_argument, NULL, 's' },
        { "verbose",            no_argument,       NULL, 'v' },
        { "version",            no_argument,       NULL, 'V' }, /* don't advertise -V */
        { "export",             no_argument,       NULL, 'x' },
        { "help",               no_argument,       NULL, 'h' },
        {}
};

static bool all_good = false;
static bool dev_specified = false;
static char config_file[MAX_PATH_LEN] = "/etc/scsi_id.config";
static enum page_code default_page_code = PAGE_UNSPECIFIED;
static int sg_version = 4;
static bool reformat_serial = false;
static bool export = false;
static char vendor_str[64];
static char model_str[64];
static char vendor_enc_str[256];
static char model_enc_str[256];
static char revision_str[16];
static char type_str[16];

static void set_type(unsigned type_num, char *to, size_t len) {
        const char *type;

        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:
                type = "generic";
                break;
        }
        strscpy(to, len, type);
}

/*
 * 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) {
        _cleanup_free_ char *vendor_in = NULL, *model_in = NULL, *options_in = NULL; /* read in from file */
        _cleanup_strv_free_ char **options_argv = NULL;
        _cleanup_fclose_ FILE *f = NULL;
        int lineno, r;

        f = fopen(config_file, "re");
        if (!f) {
                if (errno == ENOENT)
                        return 1;
                else {
                        log_error_errno(errno, "can't open %s: %m", config_file);
                        return -1;
                }
        }

        *newargv = NULL;
        lineno = 0;
        for (;;) {
                _cleanup_free_ char *buffer = NULL, *key = NULL, *value = NULL;
                const char *buf;

                vendor_in = model_in = options_in = NULL;

                r = read_line(f, MAX_BUFFER_LEN, &buffer);
                if (r < 0)
                        return log_error_errno(r, "read_line() on line %d of %s failed: %m", lineno, config_file);
                if (r == 0)
                        break;
                buf = buffer;
                lineno++;

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

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

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

                r = extract_many_words(&buf, "=\",\n", 0, &key, &value, NULL);
                if (r < 2)
                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Error parsing config file line %d '%s'", lineno, buffer);

                if (strcaseeq(key, "VENDOR")) {
                        vendor_in = TAKE_PTR(value);

                        key = mfree(key);
                        r = extract_many_words(&buf, "=\",\n", 0, &key, &value, NULL);
                        if (r < 2)
                                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Error parsing config file line %d '%s'", lineno, buffer);

                        if (strcaseeq(key, "MODEL")) {
                                model_in = TAKE_PTR(value);

                                key = mfree(key);
                                r = extract_many_words(&buf, "=\",\n", 0, &key, &value, NULL);
                                if (r < 2)
                                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Error parsing config file line %d '%s'", lineno, buffer);
                        }
                }

                if (strcaseeq(key, "OPTIONS"))
                        options_in = TAKE_PTR(value);

                /*
                 * Only allow: [vendor=foo[,model=bar]]options=stuff
                 */
                if (!options_in || (!vendor_in && model_in))
                        return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Error parsing config file line %d '%s'", lineno, buffer);
                if (!vendor) {
                        if (!vendor_in)
                                break;
                } else if (vendor_in &&
                           startswith(vendor, vendor_in) &&
                           (!model_in || startswith(model, model_in))) {
                                /*
                                 * Matched vendor and optionally model.
                                 *
                                 * Note: a short vendor_in or model_in can
                                 * give a partial match (that is FOO
                                 * matches FOOBAR).
                                 */
                                break;
                }

                vendor_in = mfree(vendor_in);
                model_in = mfree(model_in);
                options_in = mfree(options_in);

        }

        if (vendor_in == NULL && model_in == NULL && options_in == NULL)
                return 1; /* No matches  */

        /*
        * Something matched. Allocate newargv, and store
        * values found in options_in.
        */
        options_argv = strv_split(options_in, " \t");
        if (!options_argv)
                return log_oom();
        r = strv_prepend(&options_argv, ""); /* getopt skips over argv[0] */
        if (r < 0)
                return r;
        *newargv = TAKE_PTR(options_argv);
        *argc = strv_length(*newargv);

        return 0;
}

static void help(void) {
        printf("Usage: %s [OPTION...] DEVICE\n\n"
               "SCSI device identification.\n\n"
               "  -h --help                        Print this message\n"
               "     --version                     Print version of the program\n\n"
               "  -d --device=                     Device node for SG_IO commands\n"
               "  -f --config=                     Location of config file\n"
               "  -p --page=0x80|0x83|pre-spc3-83  SCSI page (0x80, 0x83, pre-spc3-83)\n"
               "  -s --sg-version=3|4              Use SGv3 or SGv4\n"
               "  -b --blacklisted                 Treat device as blacklisted\n"
               "  -g --whitelisted                 Treat device as whitelisted\n"
               "  -u --replace-whitespace          Replace all whitespace by underscores\n"
               "  -v --verbose                     Verbose logging\n"
               "  -x --export                      Print values as environment keys\n",
               program_invocation_short_name);
}

static int set_options(int argc, char **argv,
                       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 ((option = getopt_long(argc, argv, "d:f:gp:uvVxhbs:", options, NULL)) >= 0)
                switch (option) {
                case 'b':
                        all_good = false;
                        break;

                case 'd':
                        dev_specified = true;
                        strscpy(maj_min_dev, MAX_PATH_LEN, optarg);
                        break;

                case 'f':
                        strscpy(config_file, MAX_PATH_LEN, optarg);
                        break;

                case 'g':
                        all_good = true;
                        break;

                case 'h':
                        help();
                        exit(EXIT_SUCCESS);

                case 'p':
                        if (streq(optarg, "0x80"))
                                default_page_code = PAGE_80;
                        else if (streq(optarg, "0x83"))
                                default_page_code = PAGE_83;
                        else if (streq(optarg, "pre-spc3-83"))
                                default_page_code = PAGE_83_PRE_SPC3;
                        else
                                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                                       "Unknown page code '%s'",
                                                       optarg);
                        break;

                case 's':
                        sg_version = atoi(optarg);
                        if (sg_version < 3 || sg_version > 4)
                                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
                                                       "Unknown SG version '%s'",
                                                       optarg);
                        break;

                case 'u':
                        reformat_serial = true;
                        break;

                case 'v':
                        log_set_target(LOG_TARGET_CONSOLE);
                        log_set_max_level(LOG_DEBUG);
                        log_open();
                        break;

                case 'V':
                        printf("%s\n", GIT_VERSION);
                        exit(EXIT_SUCCESS);

                case 'x':
                        export = true;
                        break;

                case '?':
                        return -1;

                default:
                        assert_not_reached();
                }

        if (optind < argc && !dev_specified) {
                dev_specified = true;
                strscpy(maj_min_dev, MAX_PATH_LEN, argv[optind]);
        }

        return 0;
}

static int per_dev_options(struct scsi_id_device *dev_scsi, int *good_bad, int *page_code) {
        _cleanup_strv_free_ char **newargv = NULL;
        int retval;
        int newargc;
        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, "bgp:", options, NULL);
                if (option == -1)
                        break;

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

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

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

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

        return retval;
}

static int set_inq_values(struct scsi_id_device *dev_scsi, const char *path) {
        int retval;

        dev_scsi->use_sg = sg_version;

        retval = scsi_std_inquiry(dev_scsi, path);
        if (retval)
                return retval;

        encode_devnode_name(dev_scsi->vendor, vendor_enc_str, sizeof(vendor_enc_str));
        encode_devnode_name(dev_scsi->model, model_enc_str, sizeof(model_enc_str));

        udev_replace_whitespace(dev_scsi->vendor, vendor_str, sizeof(vendor_str)-1);
        udev_replace_chars(vendor_str, NULL);
        udev_replace_whitespace(dev_scsi->model, model_str, sizeof(model_str)-1);
        udev_replace_chars(model_str, NULL);
        set_type(dev_scsi->type, type_str, sizeof(type_str));
        udev_replace_whitespace(dev_scsi->revision, revision_str, sizeof(revision_str)-1);
        udev_replace_chars(revision_str, NULL);
        return 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.
 */
static int scsi_id(char *maj_min_dev) {
        struct scsi_id_device dev_scsi = {};
        int good_dev;
        int page_code;
        int retval = 0;

        if (set_inq_values(&dev_scsi, maj_min_dev) < 0) {
                retval = 1;
                goto out;
        }

        /* get per device (vendor + model) options from the config file */
        per_dev_options(&dev_scsi, &good_dev, &page_code);
        if (!good_dev) {
                retval = 1;
                goto out;
        }

        /* read serial number from mode pages (no values for optical drives) */
        scsi_get_serial(&dev_scsi, maj_min_dev, page_code, MAX_SERIAL_LEN);

        if (export) {
                char serial_str[MAX_SERIAL_LEN];

                printf("ID_SCSI=1\n");
                printf("ID_VENDOR=%s\n", vendor_str);
                printf("ID_VENDOR_ENC=%s\n", vendor_enc_str);
                printf("ID_MODEL=%s\n", model_str);
                printf("ID_MODEL_ENC=%s\n", model_enc_str);
                printf("ID_REVISION=%s\n", revision_str);
                printf("ID_TYPE=%s\n", type_str);
                if (dev_scsi.serial[0] != '\0') {
                        udev_replace_whitespace(dev_scsi.serial, serial_str, sizeof(serial_str)-1);
                        udev_replace_chars(serial_str, NULL);
                        printf("ID_SERIAL=%s\n", serial_str);
                        udev_replace_whitespace(dev_scsi.serial_short, serial_str, sizeof(serial_str)-1);
                        udev_replace_chars(serial_str, NULL);
                        printf("ID_SERIAL_SHORT=%s\n", serial_str);
                }
                if (dev_scsi.wwn[0] != '\0') {
                        printf("ID_WWN=0x%s\n", dev_scsi.wwn);
                        if (dev_scsi.wwn_vendor_extension[0] != '\0') {
                                printf("ID_WWN_VENDOR_EXTENSION=0x%s\n", dev_scsi.wwn_vendor_extension);
                                printf("ID_WWN_WITH_EXTENSION=0x%s%s\n", dev_scsi.wwn, dev_scsi.wwn_vendor_extension);
                        } else
                                printf("ID_WWN_WITH_EXTENSION=0x%s\n", dev_scsi.wwn);
                }
                if (dev_scsi.tgpt_group[0] != '\0')
                        printf("ID_TARGET_PORT=%s\n", dev_scsi.tgpt_group);
                if (dev_scsi.unit_serial_number[0] != '\0')
                        printf("ID_SCSI_SERIAL=%s\n", dev_scsi.unit_serial_number);
                goto out;
        }

        if (dev_scsi.serial[0] == '\0') {
                retval = 1;
                goto out;
        }

        if (reformat_serial) {
                char serial_str[MAX_SERIAL_LEN];

                udev_replace_whitespace(dev_scsi.serial, serial_str, sizeof(serial_str)-1);
                udev_replace_chars(serial_str, NULL);
                printf("%s\n", serial_str);
                goto out;
        }

        printf("%s\n", dev_scsi.serial);
out:
        return retval;
}

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

        log_set_target(LOG_TARGET_AUTO);
        udev_parse_config();
        log_parse_environment();
        log_open();

        /*
         * Get config file options.
         */
        retval = get_file_options(NULL, NULL, &newargc, &newargv);
        if (retval < 0) {
                retval = 1;
                goto exit;
        }
        if (retval == 0) {
                assert(newargv);

                if (set_options(newargc, newargv, maj_min_dev) < 0) {
                        retval = 2;
                        goto exit;
                }
        }

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

        if (!dev_specified) {
                log_error("No device specified.");
                retval = 1;
                goto exit;
        }

        retval = scsi_id(maj_min_dev);

exit:
        log_close();
        return retval;
}