src/udev/scsi_id/scsi_id.c

   1 /*
   2  * Copyright (C) IBM Corp. 2003
   3  * Copyright (C) SUSE Linux Products GmbH, 2006
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <stdarg.h>
  22 #include <stdbool.h>
  23 #include <unistd.h>
  24 #include <signal.h>
  25 #include <fcntl.h>
  26 #include <errno.h>
  27 #include <string.h>
  28 #include <ctype.h>
  29 #include <getopt.h>
  30 #include <sys/stat.h>
  31
  32 #include "libudev.h"
  33 #include "libudev-private.h"
  34 #include "scsi_id.h"
  35 #include "udev-util.h"
  36
  37 static const struct option options[] = {
  38         { "device",             required_argument, NULL, 'd' },
  39         { "config",             required_argument, NULL, 'f' },
  40         { "page",               required_argument, NULL, 'p' },
  41         { "blacklisted",        no_argument,       NULL, 'b' },
  42         { "whitelisted",        no_argument,       NULL, 'g' },
  43         { "replace-whitespace", no_argument,       NULL, 'u' },
  44         { "sg-version",         required_argument, NULL, 's' },
  45         { "verbose",            no_argument,       NULL, 'v' },
  46         { "version",            no_argument,       NULL, 'V' }, /* don't advertise -V */
  47         { "export",             no_argument,       NULL, 'x' },
  48         { "help",               no_argument,       NULL, 'h' },
  49         {}
  50 };
  51
  52 static bool all_good = false;
  53 static bool dev_specified = false;
  54 static char config_file[MAX_PATH_LEN] = "/etc/scsi_id.config";
  55 static enum page_code default_page_code = PAGE_UNSPECIFIED;
  56 static int sg_version = 4;
  57 static bool reformat_serial = false;
  58 static bool export = false;
  59 static char vendor_str[64];
  60 static char model_str[64];
  61 static char vendor_enc_str[256];
  62 static char model_enc_str[256];
  63 static char revision_str[16];
  64 static char type_str[16];
  65
  66 static void set_type(const char *from, char *to, size_t len)
  67 {
  68         int type_num;
  69         char *eptr;
  70         const char *type = "generic";
  71
  72         type_num = strtoul(from, &eptr, 0);
  73         if (eptr != from) {
  74                 switch (type_num) {
  75                 case 0:
  76                         type = "disk";
  77                         break;
  78                 case 1:
  79                         type = "tape";
  80                         break;
  81                 case 4:
  82                         type = "optical";
  83                         break;
  84                 case 5:
  85                         type = "cd";
  86                         break;
  87                 case 7:
  88                         type = "optical";
  89                         break;
  90                 case 0xe:
  91                         type = "disk";
  92                         break;
  93                 case 0xf:
  94                         type = "optical";
  95                         break;
  96                 default:
  97                         break;
  98                 }
  99         }
 100         strscpy(to, len, type);
 101 }
 102
 103 /*
 104  * get_value:
 105  *
 106  * buf points to an '=' followed by a quoted string ("foo") or a string ending
 107  * with a space or ','.
 108  *
 109  * Return a pointer to the NUL terminated string, returns NULL if no
 110  * matches.
 111  */
 112 static char *get_value(char **buffer)
 113 {
 114         static const char *quote_string = "\"\n";
 115         static const char *comma_string = ",\n";
 116         char *val;
 117         const char *end;
 118
 119         if (**buffer == '"') {
 120                 /*
 121                  * skip leading quote, terminate when quote seen
 122                  */
 123                 (*buffer)++;
 124                 end = quote_string;
 125         } else {
 126                 end = comma_string;
 127         }
 128         val = strsep(buffer, end);
 129         if (val && end == quote_string)
 130                 /*
 131                  * skip trailing quote
 132                  */
 133                 (*buffer)++;
 134
 135         while (isspace(**buffer))
 136                 (*buffer)++;
 137
 138         return val;
 139 }
 140
 141 static int argc_count(char *opts)
 142 {
 143         int i = 0;
 144         while (*opts != '\0')
 145                 if (*opts++ == ' ')
 146                         i++;
 147         return i;
 148 }
 149
 150 /*
 151  * get_file_options:
 152  *
 153  * If vendor == NULL, find a line in the config file with only "OPTIONS=";
 154  * if vendor and model are set find the first OPTIONS line in the config
 155  * file that matches. Set argc and argv to match the OPTIONS string.
 156  *
 157  * vendor and model can end in '\n'.
 158  */
 159 static int get_file_options(struct udev *udev,
 160                             const char *vendor, const char *model,
 161                             int *argc, char ***newargv)
 162 {
 163         char *buffer;
 164         _cleanup_fclose_ FILE *f;
 165         char *buf;
 166         char *str1;
 167         char *vendor_in, *model_in, *options_in; /* read in from file */
 168         int lineno;
 169         int c;
 170         int retval = 0;
 171
 172         f = fopen(config_file, "re");
 173         if (f == NULL) {
 174                 if (errno == ENOENT)
 175                         return 1;
 176                 else {
 177                         log_error_errno(errno, "can't open %s: %m", config_file);
 178                         return -1;
 179                 }
 180         }
 181
 182         /*
 183          * Allocate a buffer rather than put it on the stack so we can
 184          * keep it around to parse any options (any allocated newargv
 185          * points into this buffer for its strings).
 186          */
 187         buffer = malloc(MAX_BUFFER_LEN);
 188         if (!buffer)
 189                 return log_oom();
 190
 191         *newargv = NULL;
 192         lineno = 0;
 193         while (1) {
 194                 vendor_in = model_in = options_in = NULL;
 195
 196                 buf = fgets(buffer, MAX_BUFFER_LEN, f);
 197                 if (buf == NULL)
 198                         break;
 199                 lineno++;
 200                 if (buf[strlen(buffer) - 1] != '\n') {
 201                         log_error("Config file line %d too long", lineno);
 202                         break;
 203                 }
 204
 205                 while (isspace(*buf))
 206                         buf++;
 207
 208                 /* blank or all whitespace line */
 209                 if (*buf == '\0')
 210                         continue;
 211
 212                 /* comment line */
 213                 if (*buf == '#')
 214                         continue;
 215
 216                 str1 = strsep(&buf, "=");
 217                 if (str1 && strcaseeq(str1, "VENDOR")) {
 218                         str1 = get_value(&buf);
 219                         if (!str1) {
 220                                 retval = log_oom();
 221                                 break;
 222                         }
 223                         vendor_in = str1;
 224
 225                         str1 = strsep(&buf, "=");
 226                         if (str1 && strcaseeq(str1, "MODEL")) {
 227                                 str1 = get_value(&buf);
 228                                 if (!str1) {
 229                                         retval = log_oom();
 230                                         break;
 231                                 }
 232                                 model_in = str1;
 233                                 str1 = strsep(&buf, "=");
 234                         }
 235                 }
 236
 237                 if (str1 && strcaseeq(str1, "OPTIONS")) {
 238                         str1 = get_value(&buf);
 239                         if (!str1) {
 240                                 retval = log_oom();
 241                                 break;
 242                         }
 243                         options_in = str1;
 244                 }
 245
 246                 /*
 247                  * Only allow: [vendor=foo[,model=bar]]options=stuff
 248                  */
 249                 if (!options_in || (!vendor_in && model_in)) {
 250                         log_error("Error parsing config file line %d '%s'", lineno, buffer);
 251                         retval = -1;
 252                         break;
 253                 }
 254                 if (vendor == NULL) {
 255                         if (vendor_in == NULL)
 256                                 break;
 257                 } else if (vendor_in &&
 258                            strneq(vendor, vendor_in, strlen(vendor_in)) &&
 259                            (!model_in ||
 260                             (strneq(model, model_in, strlen(model_in))))) {
 261                                 /*
 262                                  * Matched vendor and optionally model.
 263                                  *
 264                                  * Note: a short vendor_in or model_in can
 265                                  * give a partial match (that is FOO
 266                                  * matches FOOBAR).
 267                                  */
 268                                 break;
 269                 }
 270         }
 271
 272         if (retval == 0) {
 273                 if (vendor_in != NULL || model_in != NULL ||
 274                     options_in != NULL) {
 275                         /*
 276                          * Something matched. Allocate newargv, and store
 277                          * values found in options_in.
 278                          */
 279                         strcpy(buffer, options_in);
 280                         c = argc_count(buffer) + 2;
 281                         *newargv = calloc(c, sizeof(**newargv));
 282                         if (!*newargv) {
 283                                 retval = log_oom();
 284                         } else {
 285                                 *argc = c;
 286                                 c = 0;
 287                                 /*
 288                                  * argv[0] at 0 is skipped by getopt, but
 289                                  * store the buffer address there for
 290                                  * later freeing
 291                                  */
 292                                 (*newargv)[c] = buffer;
 293                                 for (c = 1; c < *argc; c++)
 294                                         (*newargv)[c] = strsep(&buffer, " \t");
 295                         }
 296                 } else {
 297                         /* No matches  */
 298                         retval = 1;
 299                 }
 300         }
 301         if (retval != 0)
 302                 free(buffer);
 303         return retval;
 304 }
 305
 306 static void help(void) {
 307         printf("Usage: scsi_id [OPTION...] DEVICE\n"
 308                "  -d,--device=                     device node for SG_IO commands\n"
 309                "  -f,--config=                     location of config file\n"
 310                "  -p,--page=0x80|0x83|pre-spc3-83  SCSI page (0x80, 0x83, pre-spc3-83)\n"
 311                "  -s,--sg-version=3|4              use SGv3 or SGv4\n"
 312                "  -b,--blacklisted                 treat device as blacklisted\n"
 313                "  -g,--whitelisted                 treat device as whitelisted\n"
 314                "  -u,--replace-whitespace          replace all whitespace by underscores\n"
 315                "  -v,--verbose                     verbose logging\n"
 316                "     --version                     print version\n"
 317                "  -x,--export                      print values as environment keys\n"
 318                "  -h,--help                        print this help text\n\n");
 319
 320 }
 321
 322 static int set_options(struct udev *udev,
 323                        int argc, char **argv,
 324                        char *maj_min_dev)
 325 {
 326         int option;
 327
 328         /*
 329          * optind is a global extern used by getopt. Since we can call
 330          * set_options twice (once for command line, and once for config
 331          * file) we have to reset this back to 1.
 332          */
 333         optind = 1;
 334         while ((option = getopt_long(argc, argv, "d:f:gp:uvVxh", options, NULL)) >= 0)
 335                 switch (option) {
 336                 case 'b':
 337                         all_good = false;
 338                         break;
 339
 340                 case 'd':
 341                         dev_specified = true;
 342                         strscpy(maj_min_dev, MAX_PATH_LEN, optarg);
 343                         break;
 344
 345                 case 'f':
 346                         strscpy(config_file, MAX_PATH_LEN, optarg);
 347                         break;
 348
 349                 case 'g':
 350                         all_good = true;
 351                         break;
 352
 353                 case 'h':
 354                         help();
 355                         exit(0);
 356
 357                 case 'p':
 358                         if (streq(optarg, "0x80"))
 359                                 default_page_code = PAGE_80;
 360                         else if (streq(optarg, "0x83"))
 361                                 default_page_code = PAGE_83;
 362                         else if (streq(optarg, "pre-spc3-83"))
 363                                 default_page_code = PAGE_83_PRE_SPC3;
 364                         else {
 365                                 log_error("Unknown page code '%s'", optarg);
 366                                 return -1;
 367                         }
 368                         break;
 369
 370                 case 's':
 371                         sg_version = atoi(optarg);
 372                         if (sg_version < 3 || sg_version > 4) {
 373                                 log_error("Unknown SG version '%s'", optarg);
 374                                 return -1;
 375                         }
 376                         break;
 377
 378                 case 'u':
 379                         reformat_serial = true;
 380                         break;
 381
 382                 case 'v':
 383                         log_set_target(LOG_TARGET_CONSOLE);
 384                         log_set_max_level(LOG_DEBUG);
 385                         log_open();
 386                         break;
 387
 388                 case 'V':
 389                         printf("%s\n", VERSION);
 390                         exit(0);
 391
 392                 case 'x':
 393                         export = true;
 394                         break;
 395
 396                 case '?':
 397                         return -1;
 398
 399                 default:
 400                         assert_not_reached("Unknown option");
 401                 }
 402
 403         if (optind < argc && !dev_specified) {
 404                 dev_specified = true;
 405                 strscpy(maj_min_dev, MAX_PATH_LEN, argv[optind]);
 406         }
 407
 408         return 0;
 409 }
 410
 411 static int per_dev_options(struct udev *udev,
 412                            struct scsi_id_device *dev_scsi, int *good_bad, int *page_code)
 413 {
 414         int retval;
 415         int newargc;
 416         char **newargv = NULL;
 417         int option;
 418
 419         *good_bad = all_good;
 420         *page_code = default_page_code;
 421
 422         retval = get_file_options(udev, vendor_str, model_str, &newargc, &newargv);
 423
 424         optind = 1; /* reset this global extern */
 425         while (retval == 0) {
 426                 option = getopt_long(newargc, newargv, "bgp:", options, NULL);
 427                 if (option == -1)
 428                         break;
 429
 430                 switch (option) {
 431                 case 'b':
 432                         *good_bad = 0;
 433                         break;
 434
 435                 case 'g':
 436                         *good_bad = 1;
 437                         break;
 438
 439                 case 'p':
 440                         if (streq(optarg, "0x80")) {
 441                                 *page_code = PAGE_80;
 442                         } else if (streq(optarg, "0x83")) {
 443                                 *page_code = PAGE_83;
 444                         } else if (streq(optarg, "pre-spc3-83")) {
 445                                 *page_code = PAGE_83_PRE_SPC3;
 446                         } else {
 447                                 log_error("Unknown page code '%s'", optarg);
 448                                 retval = -1;
 449                         }
 450                         break;
 451
 452                 default:
 453                         log_error("Unknown or bad option '%c' (0x%x)", option, option);
 454                         retval = -1;
 455                         break;
 456                 }
 457         }
 458
 459         if (newargv) {
 460                 free(newargv[0]);
 461                 free(newargv);
 462         }
 463         return retval;
 464 }
 465
 466 static int set_inq_values(struct udev *udev, struct scsi_id_device *dev_scsi, const char *path)
 467 {
 468         int retval;
 469
 470         dev_scsi->use_sg = sg_version;
 471
 472         retval = scsi_std_inquiry(udev, dev_scsi, path);
 473         if (retval)
 474                 return retval;
 475
 476         udev_util_encode_string(dev_scsi->vendor, vendor_enc_str, sizeof(vendor_enc_str));
 477         udev_util_encode_string(dev_scsi->model, model_enc_str, sizeof(model_enc_str));
 478
 479         util_replace_whitespace(dev_scsi->vendor, vendor_str, sizeof(vendor_str));
 480         util_replace_chars(vendor_str, NULL);
 481         util_replace_whitespace(dev_scsi->model, model_str, sizeof(model_str));
 482         util_replace_chars(model_str, NULL);
 483         set_type(dev_scsi->type, type_str, sizeof(type_str));
 484         util_replace_whitespace(dev_scsi->revision, revision_str, sizeof(revision_str));
 485         util_replace_chars(revision_str, NULL);
 486         return 0;
 487 }
 488
 489 /*
 490  * scsi_id: try to get an id, if one is found, printf it to stdout.
 491  * returns a value passed to exit() - 0 if printed an id, else 1.
 492  */
 493 static int scsi_id(struct udev *udev, char *maj_min_dev)
 494 {
 495         struct scsi_id_device dev_scsi = {};
 496         int good_dev;
 497         int page_code;
 498         int retval = 0;
 499
 500         if (set_inq_values(udev, &dev_scsi, maj_min_dev) < 0) {
 501                 retval = 1;
 502                 goto out;
 503         }
 504
 505         /* get per device (vendor + model) options from the config file */
 506         per_dev_options(udev, &dev_scsi, &good_dev, &page_code);
 507         if (!good_dev) {
 508                 retval = 1;
 509                 goto out;
 510         }
 511
 512         /* read serial number from mode pages (no values for optical drives) */
 513         scsi_get_serial(udev, &dev_scsi, maj_min_dev, page_code, MAX_SERIAL_LEN);
 514
 515         if (export) {
 516                 char serial_str[MAX_SERIAL_LEN];
 517
 518                 printf("ID_SCSI=1\n");
 519                 printf("ID_VENDOR=%s\n", vendor_str);
 520                 printf("ID_VENDOR_ENC=%s\n", vendor_enc_str);
 521                 printf("ID_MODEL=%s\n", model_str);
 522                 printf("ID_MODEL_ENC=%s\n", model_enc_str);
 523                 printf("ID_REVISION=%s\n", revision_str);
 524                 printf("ID_TYPE=%s\n", type_str);
 525                 if (dev_scsi.serial[0] != '\0') {
 526                         util_replace_whitespace(dev_scsi.serial, serial_str, sizeof(serial_str));
 527                         util_replace_chars(serial_str, NULL);
 528                         printf("ID_SERIAL=%s\n", serial_str);
 529                         util_replace_whitespace(dev_scsi.serial_short, serial_str, sizeof(serial_str));
 530                         util_replace_chars(serial_str, NULL);
 531                         printf("ID_SERIAL_SHORT=%s\n", serial_str);
 532                 }
 533                 if (dev_scsi.wwn[0] != '\0') {
 534                         printf("ID_WWN=0x%s\n", dev_scsi.wwn);
 535                         if (dev_scsi.wwn_vendor_extension[0] != '\0') {
 536                                 printf("ID_WWN_VENDOR_EXTENSION=0x%s\n", dev_scsi.wwn_vendor_extension);
 537                                 printf("ID_WWN_WITH_EXTENSION=0x%s%s\n", dev_scsi.wwn, dev_scsi.wwn_vendor_extension);
 538                         } else {
 539                                 printf("ID_WWN_WITH_EXTENSION=0x%s\n", dev_scsi.wwn);
 540                         }
 541                 }
 542                 if (dev_scsi.tgpt_group[0] != '\0') {
 543                         printf("ID_TARGET_PORT=%s\n", dev_scsi.tgpt_group);
 544                 }
 545                 if (dev_scsi.unit_serial_number[0] != '\0') {
 546                         printf("ID_SCSI_SERIAL=%s\n", dev_scsi.unit_serial_number);
 547                 }
 548                 goto out;
 549         }
 550
 551         if (dev_scsi.serial[0] == '\0') {
 552                 retval = 1;
 553                 goto out;
 554         }
 555
 556         if (reformat_serial) {
 557                 char serial_str[MAX_SERIAL_LEN];
 558
 559                 util_replace_whitespace(dev_scsi.serial, serial_str, sizeof(serial_str));
 560                 util_replace_chars(serial_str, NULL);
 561                 printf("%s\n", serial_str);
 562                 goto out;
 563         }
 564
 565         printf("%s\n", dev_scsi.serial);
 566 out:
 567         return retval;
 568 }
 569
 570 int main(int argc, char **argv)
 571 {
 572         _cleanup_udev_unref_ struct udev *udev;
 573         int retval = 0;
 574         char maj_min_dev[MAX_PATH_LEN];
 575         int newargc;
 576         char **newargv = NULL;
 577
 578         log_parse_environment();
 579         log_open();
 580
 581         udev = udev_new();
 582         if (udev == NULL)
 583                 goto exit;
 584
 585         /*
 586          * Get config file options.
 587          */
 588         retval = get_file_options(udev, NULL, NULL, &newargc, &newargv);
 589         if (retval < 0) {
 590                 retval = 1;
 591                 goto exit;
 592         }
 593         if (retval == 0) {
 594                 assert(newargv);
 595
 596                 if (set_options(udev, newargc, newargv, maj_min_dev) < 0) {
 597                         retval = 2;
 598                         goto exit;
 599                 }
 600         }
 601
 602         /*
 603          * Get command line options (overriding any config file settings).
 604          */
 605         if (set_options(udev, argc, argv, maj_min_dev) < 0)
 606                 exit(1);
 607
 608         if (!dev_specified) {
 609                 log_error("no device specified");
 610                 retval = 1;
 611                 goto exit;
 612         }
 613
 614         retval = scsi_id(udev, maj_min_dev);
 615
 616 exit:
 617         if (newargv) {
 618                 free(newargv[0]);
 619                 free(newargv);
 620         }
 621         log_close();
 622         return retval;
 623 }