udev/udev-rules.c

   1 /*
   2  * Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <stddef.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #include <stdio.h>
  22 #include <fcntl.h>
  23 #include <ctype.h>
  24 #include <unistd.h>
  25 #include <errno.h>
  26 #include <dirent.h>
  27 #include <fnmatch.h>
  28
  29 #include "udev.h"
  30
  31 #define PREALLOC_TOKEN                  2048
  32 #define PREALLOC_STRBUF                 32 * 1024
  33
  34 enum key_operation {
  35         KEY_OP_UNSET,
  36         KEY_OP_MATCH,
  37         KEY_OP_NOMATCH,
  38         KEY_OP_ADD,
  39         KEY_OP_ASSIGN,
  40         KEY_OP_ASSIGN_FINAL,
  41 };
  42
  43 static const char *operation_str[] = {
  44         [KEY_OP_MATCH] =        "match",
  45         [KEY_OP_NOMATCH] =      "nomatch",
  46         [KEY_OP_ADD] =          "add",
  47         [KEY_OP_ASSIGN] =       "assign",
  48         [KEY_OP_ASSIGN_FINAL] = "assign-final",
  49 };
  50
  51 enum token_type {
  52         TK_UNDEF,
  53         TK_RULE,
  54
  55         TK_M_ACTION,                    /* val */
  56         TK_M_DEVPATH,                   /* val */
  57         TK_M_KERNEL,                    /* val */
  58         TK_M_DEVLINK,                   /* val */
  59         TK_M_NAME,                      /* val */
  60         TK_M_ENV,                       /* val, attr */
  61         TK_M_SUBSYSTEM,                 /* val */
  62         TK_M_DRIVER,                    /* val */
  63         TK_M_WAITFOR,                   /* val */
  64         TK_M_ATTR,                      /* val, attr */
  65
  66         TK_M_KERNELS,                   /* val */
  67         TK_M_SUBSYSTEMS,                /* val */
  68         TK_M_DRIVERS,                   /* val */
  69         TK_M_ATTRS,                     /* val, attr */
  70         TK_PARENTS_MAX,
  71
  72         TK_M_TEST,                      /* val, mode_t */
  73         TK_M_PROGRAM,                   /* val */
  74         TK_M_IMPORT_FILE,               /* val */
  75         TK_M_IMPORT_PROG,               /* val */
  76         TK_M_IMPORT_PARENT,             /* val */
  77         TK_M_RESULT,                    /* val */
  78
  79         TK_A_IGNORE_DEVICE,
  80         TK_A_STRING_ESCAPE_NONE,
  81         TK_A_STRING_ESCAPE_REPLACE,
  82         TK_A_NUM_FAKE_PART,             /* int */
  83         TK_A_DEVLINK_PRIO,              /* int */
  84         TK_A_OWNER,                     /* val */
  85         TK_A_GROUP,                     /* val */
  86         TK_A_MODE,                      /* val */
  87         TK_A_OWNER_ID,                  /* uid_t */
  88         TK_A_GROUP_ID,                  /* gid_t */
  89         TK_A_MODE_ID,                   /* mode_t */
  90         TK_A_ENV,                       /* val, attr */
  91         TK_A_NAME,                      /* val */
  92         TK_A_DEVLINK,                   /* val */
  93         TK_A_EVENT_TIMEOUT,             /* int */
  94         TK_A_IGNORE_REMOVE,
  95         TK_A_ATTR,                      /* val, attr */
  96         TK_A_RUN,                       /* val, bool */
  97         TK_A_GOTO,                      /* size_t */
  98         TK_A_LAST_RULE,
  99
 100         TK_END,
 101 };
 102
 103 static const char *token_str[] = {
 104         [TK_UNDEF] =                    "UNDEF",
 105         [TK_RULE] =                     "RULE",
 106
 107         [TK_M_ACTION] =                 "M ACTION",
 108         [TK_M_DEVPATH] =                "M DEVPATH",
 109         [TK_M_KERNEL] =                 "M KERNEL",
 110         [TK_M_DEVLINK] =                "M DEVLINK",
 111         [TK_M_NAME] =                   "M NAME",
 112         [TK_M_ENV] =                    "M ENV",
 113         [TK_M_SUBSYSTEM] =              "M SUBSYSTEM",
 114         [TK_M_DRIVER] =                 "M DRIVER",
 115         [TK_M_WAITFOR] =                "M WAITFOR",
 116         [TK_M_ATTR] =                   "M ATTR",
 117
 118         [TK_M_KERNELS] =                "M KERNELS",
 119         [TK_M_SUBSYSTEMS] =             "M SUBSYSTEMS",
 120         [TK_M_DRIVERS] =                "M DRIVERS",
 121         [TK_M_ATTRS] =                  "M ATTRS",
 122         [TK_PARENTS_MAX] =              "PARENTS_MAX",
 123
 124         [TK_M_TEST] =                   "M TEST",
 125         [TK_M_PROGRAM] =                "M PROGRAM",
 126         [TK_M_IMPORT_FILE] =            "M IMPORT_FILE",
 127         [TK_M_IMPORT_PROG] =            "M IMPORT_PROG",
 128         [TK_M_IMPORT_PARENT] =          "M MPORT_PARENT",
 129         [TK_M_RESULT] =                 "M RESULT",
 130
 131         [TK_A_IGNORE_DEVICE] =          "A IGNORE_DEVICE",
 132         [TK_A_STRING_ESCAPE_NONE] =     "A STRING_ESCAPE_NONE",
 133         [TK_A_STRING_ESCAPE_REPLACE] =  "A STRING_ESCAPE_REPLACE",
 134         [TK_A_NUM_FAKE_PART] =          "A NUM_FAKE_PART",
 135         [TK_A_DEVLINK_PRIO] =           "A DEVLINK_PRIO",
 136         [TK_A_OWNER] =                  "A OWNER",
 137         [TK_A_GROUP] =                  "A GROUP",
 138         [TK_A_MODE] =                   "A MODE",
 139         [TK_A_OWNER_ID] =               "A OWNER_ID",
 140         [TK_A_GROUP_ID] =               "A GROUP_ID",
 141         [TK_A_MODE_ID] =                "A MODE_ID",
 142         [TK_A_ENV] =                    "A ENV",
 143         [TK_A_NAME] =                   "A NAME",
 144         [TK_A_DEVLINK] =                "A DEVLINK",
 145         [TK_A_EVENT_TIMEOUT] =          "A EVENT_TIMEOUT",
 146         [TK_A_IGNORE_REMOVE] =          "A IGNORE_REMOVE",
 147         [TK_A_ATTR] =                   "A ATTR",
 148         [TK_A_RUN] =                    "A RUN",
 149         [TK_A_GOTO] =                   "A GOTO",
 150         [TK_A_LAST_RULE] =              "A LAST_RULE",
 151
 152         [TK_END] =                      "END",
 153 };
 154
 155 struct token {
 156         enum token_type type;
 157         union {
 158                 struct {
 159                         unsigned int next_rule;
 160                         unsigned int label_off;
 161                         unsigned int filename_off;
 162                 } rule;
 163                 struct {
 164                         enum key_operation op;
 165                         unsigned int value_off;
 166                         union {
 167                                 unsigned int attr_off;
 168                                 int ignore_error;
 169                                 int i;
 170                                 unsigned int rule_goto;
 171                                 mode_t  mode;
 172                                 uid_t uid;
 173                                 gid_t gid;
 174                                 int num_fake_part;
 175                                 int devlink_prio;
 176                                 int event_timeout;
 177                         };
 178                 } key;
 179         };
 180 };
 181
 182 #define MAX_TK          64
 183 struct rule_tmp {
 184         struct udev_rules *rules;
 185         struct token rule;
 186         struct token token[MAX_TK];
 187         unsigned int token_cur;
 188 };
 189
 190 struct udev_rules {
 191         struct udev *udev;
 192         int resolve_names;
 193         struct token *tokens;
 194         unsigned int token_cur;
 195         unsigned int token_max;
 196         char *buf;
 197         size_t buf_cur;
 198         size_t buf_max;
 199         unsigned int buf_count;
 200 };
 201
 202 /* we could lookup and return existing strings, or tails of strings */
 203 static int add_string(struct udev_rules *rules, const char *str)
 204 {
 205         size_t len = strlen(str)+1;
 206         int off;
 207
 208         /* offset 0 is always '\0' */
 209         if (str[0] == '\0')
 210                 return 0;
 211
 212         /* grow buffer if needed */
 213         if (rules->buf_cur + len+1 >= rules->buf_max) {
 214                 char *buf;
 215                 unsigned int add;
 216
 217                 /* double the buffer size */
 218                 add = rules->buf_max;
 219                 if (add < len)
 220                         add = len * 2;
 221
 222                 buf = realloc(rules->buf, rules->buf_max + add);
 223                 if (buf == NULL)
 224                         return -1;
 225                 info(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
 226                 rules->buf = buf;
 227                 rules->buf_max += add;
 228         }
 229         off = rules->buf_cur;
 230         memcpy(&rules->buf[rules->buf_cur], str, len);
 231         rules->buf_cur += len;
 232         rules->buf_count++;
 233         return off;
 234 }
 235
 236 static int add_token(struct udev_rules *rules, struct token *token)
 237 {
 238
 239         /* grow buffer if needed */
 240         if (rules->token_cur+1 >= rules->token_max) {
 241                 struct token *tokens;
 242                 unsigned int add;
 243
 244                 /* double the buffer size */
 245                 add = rules->token_max;
 246                 if (add < 1)
 247                         add = 2;
 248
 249                 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
 250                 if (tokens == NULL)
 251                         return -1;
 252                 info(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
 253                 rules->tokens = tokens;
 254                 rules->token_max += add;
 255         }
 256         memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
 257         rules->token_cur++;
 258         return 0;
 259 }
 260
 261 static int import_property_from_string(struct udev_device *dev, char *line)
 262 {
 263         struct udev *udev = udev_device_get_udev(dev);
 264         char *key;
 265         char *val;
 266         size_t len;
 267
 268         /* find key */
 269         key = line;
 270         while (isspace(key[0]))
 271                 key++;
 272
 273         /* comment or empty line */
 274         if (key[0] == '#' || key[0] == '\0')
 275                 return -1;
 276
 277         /* split key/value */
 278         val = strchr(key, '=');
 279         if (val == NULL)
 280                 return -1;
 281         val[0] = '\0';
 282         val++;
 283
 284         /* find value */
 285         while (isspace(val[0]))
 286                 val++;
 287
 288         /* terminate key */
 289         len = strlen(key);
 290         if (len == 0)
 291                 return -1;
 292         while (isspace(key[len-1]))
 293                 len--;
 294         key[len] = '\0';
 295
 296         /* terminate value */
 297         len = strlen(val);
 298         if (len == 0)
 299                 return -1;
 300         while (isspace(val[len-1]))
 301                 len--;
 302         val[len] = '\0';
 303
 304         if (len == 0)
 305                 return -1;
 306
 307         /* unquote */
 308         if (val[0] == '"' || val[0] == '\'') {
 309                 if (val[len-1] != val[0]) {
 310                         info(udev, "inconsistent quoting: '%s', skip\n", line);
 311                         return -1;
 312                 }
 313                 val[len-1] = '\0';
 314                 val++;
 315         }
 316
 317         info(udev, "adding '%s'='%s'\n", key, val);
 318
 319         /* handle device, renamed by external tool, returning new path */
 320         if (strcmp(key, "DEVPATH") == 0) {
 321                 char syspath[UTIL_PATH_SIZE];
 322
 323                 info(udev, "updating devpath from '%s' to '%s'\n",
 324                      udev_device_get_devpath(dev), val);
 325                 util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
 326                 util_strlcat(syspath, val, sizeof(syspath));
 327                 udev_device_set_syspath(dev, syspath);
 328         } else {
 329                 struct udev_list_entry *entry;
 330
 331                 entry = udev_device_add_property(dev, key, val);
 332                 /* store in db */
 333                 udev_list_entry_set_flag(entry, 1);
 334         }
 335         return 0;
 336 }
 337
 338 static int import_file_into_properties(struct udev_device *dev, const char *filename)
 339 {
 340         FILE *f;
 341         char line[UTIL_LINE_SIZE];
 342
 343         f = fopen(filename, "r");
 344         if (f == NULL)
 345                 return -1;
 346         while (fgets(line, sizeof(line), f) != NULL)
 347                 import_property_from_string(dev, line);
 348         fclose(f);
 349         return 0;
 350 }
 351
 352 static int import_program_into_properties(struct udev_device *dev, const char *program)
 353 {
 354         struct udev *udev = udev_device_get_udev(dev);
 355         char **envp;
 356         char result[2048];
 357         size_t reslen;
 358         char *line;
 359
 360         envp = udev_device_get_properties_envp(dev);
 361         if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
 362                 return -1;
 363
 364         line = result;
 365         while (line != NULL) {
 366                 char *pos;
 367
 368                 pos = strchr(line, '\n');
 369                 if (pos != NULL) {
 370                         pos[0] = '\0';
 371                         pos = &pos[1];
 372                 }
 373                 import_property_from_string(dev, line);
 374                 line = pos;
 375         }
 376         return 0;
 377 }
 378
 379 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
 380 {
 381         struct udev *udev = udev_device_get_udev(dev);
 382         struct udev_device *dev_parent;
 383         struct udev_list_entry *list_entry;
 384
 385         dev_parent = udev_device_get_parent(dev);
 386         if (dev_parent == NULL)
 387                 return -1;
 388
 389         dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
 390         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
 391                 const char *key = udev_list_entry_get_name(list_entry);
 392                 const char *val = udev_list_entry_get_value(list_entry);
 393
 394                 if (fnmatch(filter, key, 0) == 0) {
 395                         struct udev_list_entry *entry;
 396
 397                         dbg(udev, "import key '%s=%s'\n", key, val);
 398                         entry = udev_device_add_property(dev, key, val);
 399                         /* store in db */
 400                         udev_list_entry_set_flag(entry, 1);
 401                 }
 402         }
 403         return 0;
 404 }
 405
 406 #define WAIT_LOOP_PER_SECOND            50
 407 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
 408 {
 409         struct udev *udev = udev_device_get_udev(dev);
 410         char filepath[UTIL_PATH_SIZE];
 411         char devicepath[UTIL_PATH_SIZE] = "";
 412         struct stat stats;
 413         int loop = timeout * WAIT_LOOP_PER_SECOND;
 414
 415         /* a relative path is a device attribute */
 416         if (file[0] != '/') {
 417                 util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath));
 418                 util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath));
 419
 420                 util_strlcpy(filepath, devicepath, sizeof(filepath));
 421                 util_strlcat(filepath, "/", sizeof(filepath));
 422                 util_strlcat(filepath, file, sizeof(filepath));
 423                 file = filepath;
 424         }
 425
 426         dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
 427         while (--loop) {
 428                 /* lookup file */
 429                 if (stat(file, &stats) == 0) {
 430                         info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
 431                         return 0;
 432                 }
 433                 /* make sure, the device did not disappear in the meantime */
 434                 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
 435                         info(udev, "device disappeared while waiting for '%s'\n", file);
 436                         return -2;
 437                 }
 438                 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
 439                 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
 440         }
 441         info(udev, "waiting for '%s' failed\n", file);
 442         return -1;
 443 }
 444
 445 static int attr_subst_subdir(char *attr, size_t len)
 446 {
 447         char *pos;
 448         int found = 0;
 449
 450         pos = strstr(attr, "/*/");
 451         if (pos != NULL) {
 452                 char str[UTIL_PATH_SIZE];
 453                 DIR *dir;
 454
 455                 pos[1] = '\0';
 456                 util_strlcpy(str, &pos[2], sizeof(str));
 457                 dir = opendir(attr);
 458                 if (dir != NULL) {
 459                         struct dirent *dent;
 460
 461                         for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 462                                 struct stat stats;
 463
 464                                 if (dent->d_name[0] == '.')
 465                                         continue;
 466                                 util_strlcat(attr, dent->d_name, len);
 467                                 util_strlcat(attr, str, len);
 468                                 if (stat(attr, &stats) == 0) {
 469                                         found = 1;
 470                                         break;
 471                                 }
 472                                 pos[1] = '\0';
 473                         }
 474                         closedir(dir);
 475                 }
 476                 if (!found)
 477                         util_strlcat(attr, str, len);
 478         }
 479
 480         return found;
 481 }
 482
 483 static int get_key(struct udev *udev, char **line, char **key, enum key_operation *op, char **value)
 484 {
 485         char *linepos;
 486         char *temp;
 487
 488         linepos = *line;
 489         if (linepos == NULL && linepos[0] == '\0')
 490                 return -1;
 491
 492         /* skip whitespace */
 493         while (isspace(linepos[0]) || linepos[0] == ',')
 494                 linepos++;
 495
 496         /* get the key */
 497         if (linepos[0] == '\0')
 498                 return -1;
 499         *key = linepos;
 500
 501         while (1) {
 502                 linepos++;
 503                 if (linepos[0] == '\0')
 504                         return -1;
 505                 if (isspace(linepos[0]))
 506                         break;
 507                 if (linepos[0] == '=')
 508                         break;
 509                 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
 510                         if (linepos[1] == '=')
 511                                 break;
 512         }
 513
 514         /* remember end of key */
 515         temp = linepos;
 516
 517         /* skip whitespace after key */
 518         while (isspace(linepos[0]))
 519                 linepos++;
 520         if (linepos[0] == '\0')
 521                 return -1;
 522
 523         /* get operation type */
 524         if (linepos[0] == '=' && linepos[1] == '=') {
 525                 *op = KEY_OP_MATCH;
 526                 linepos += 2;
 527         } else if (linepos[0] == '!' && linepos[1] == '=') {
 528                 *op = KEY_OP_NOMATCH;
 529                 linepos += 2;
 530         } else if (linepos[0] == '+' && linepos[1] == '=') {
 531                 *op = KEY_OP_ADD;
 532                 linepos += 2;
 533         } else if (linepos[0] == '=') {
 534                 *op = KEY_OP_ASSIGN;
 535                 linepos++;
 536         } else if (linepos[0] == ':' && linepos[1] == '=') {
 537                 *op = KEY_OP_ASSIGN_FINAL;
 538                 linepos += 2;
 539         } else
 540                 return -1;
 541
 542         /* terminate key */
 543         temp[0] = '\0';
 544
 545         /* skip whitespace after operator */
 546         while (isspace(linepos[0]))
 547                 linepos++;
 548         if (linepos[0] == '\0')
 549                 return -1;
 550
 551         /* get the value*/
 552         if (linepos[0] == '"')
 553                 linepos++;
 554         else
 555                 return -1;
 556         *value = linepos;
 557
 558         temp = strchr(linepos, '"');
 559         if (!temp)
 560                 return -1;
 561         temp[0] = '\0';
 562         temp++;
 563         dbg(udev, "%s '%s'-'%s'\n", operation_str[*op], *key, *value);
 564
 565         /* move line to next key */
 566         *line = temp;
 567         return 0;
 568 }
 569
 570 /* extract possible KEY{attr} */
 571 static char *get_key_attribute(struct udev *udev, char *str)
 572 {
 573         char *pos;
 574         char *attr;
 575
 576         attr = strchr(str, '{');
 577         if (attr != NULL) {
 578                 attr++;
 579                 pos = strchr(attr, '}');
 580                 if (pos == NULL) {
 581                         err(udev, "missing closing brace for format\n");
 582                         return NULL;
 583                 }
 584                 pos[0] = '\0';
 585                 dbg(udev, "attribute='%s'\n", attr);
 586                 return attr;
 587         }
 588         return NULL;
 589 }
 590
 591 static int rule_add_token(struct rule_tmp *rule_tmp, enum token_type type,
 592                           enum key_operation op,
 593                           const char *value, const void *data)
 594 {
 595         struct token *token = &rule_tmp->token[rule_tmp->token_cur];
 596         const char *attr = data;
 597         mode_t mode = 0000;
 598
 599         switch (type) {
 600         case TK_M_ACTION:
 601         case TK_M_DEVPATH:
 602         case TK_M_KERNEL:
 603         case TK_M_SUBSYSTEM:
 604         case TK_M_DRIVER:
 605         case TK_M_WAITFOR:
 606         case TK_M_DEVLINK:
 607         case TK_M_NAME:
 608         case TK_M_KERNELS:
 609         case TK_M_SUBSYSTEMS:
 610         case TK_M_DRIVERS:
 611         case TK_M_PROGRAM:
 612         case TK_M_IMPORT_FILE:
 613         case TK_M_IMPORT_PROG:
 614         case TK_M_IMPORT_PARENT:
 615         case TK_M_RESULT:
 616         case TK_A_OWNER:
 617         case TK_A_GROUP:
 618         case TK_A_MODE:
 619         case TK_A_NAME:
 620         case TK_A_DEVLINK:
 621         case TK_A_GOTO:
 622                 token->key.value_off = add_string(rule_tmp->rules, value);
 623                 break;
 624         case TK_M_ENV:
 625         case TK_M_ATTR:
 626         case TK_M_ATTRS:
 627         case TK_A_ATTR:
 628         case TK_A_ENV:
 629                 token->key.value_off = add_string(rule_tmp->rules, value);
 630                 token->key.attr_off = add_string(rule_tmp->rules, attr);
 631                 break;
 632         case TK_M_TEST:
 633                 if (data != NULL)
 634                         mode = *(mode_t *)data;
 635                 token->key.value_off = add_string(rule_tmp->rules, value);
 636                 token->key.mode = mode;
 637                 break;
 638         case TK_A_IGNORE_DEVICE:
 639         case TK_A_STRING_ESCAPE_NONE:
 640         case TK_A_STRING_ESCAPE_REPLACE:
 641         case TK_A_IGNORE_REMOVE:
 642         case TK_A_LAST_RULE:
 643                 break;
 644         case TK_A_RUN:
 645                 token->key.value_off = add_string(rule_tmp->rules, value);
 646                 token->key.ignore_error = *(int *)data;
 647                 break;
 648         case TK_A_NUM_FAKE_PART:
 649                 token->key.num_fake_part = *(int *)data;
 650                 break;
 651         case TK_A_DEVLINK_PRIO:
 652                 token->key.devlink_prio = *(int *)data;
 653                 break;
 654         case TK_A_OWNER_ID:
 655                 token->key.uid = *(uid_t *)data;
 656                 break;
 657         case TK_A_GROUP_ID:
 658                 token->key.gid = *(gid_t *)data;
 659                 break;
 660         case TK_A_MODE_ID:
 661                 token->key.mode = *(mode_t *)data;
 662                 break;
 663         case TK_A_EVENT_TIMEOUT:
 664                 token->key.event_timeout = *(int *)data;
 665                 break;
 666         case TK_RULE:
 667         case TK_PARENTS_MAX:
 668         case TK_END:
 669         case TK_UNDEF:
 670                 err(rule_tmp->rules->udev, "wrong type %u\n", type);
 671                 return -1;
 672         }
 673         token->type = type;
 674         token->key.op = op;
 675         rule_tmp->token_cur++;
 676         if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
 677                 err(rule_tmp->rules->udev, "temporary rule array too small\n");
 678                 return -1;
 679         }
 680         return 0;
 681 }
 682
 683 #ifdef DEBUG
 684 static void dump_token(struct udev_rules *rules, struct token *token)
 685 {
 686         enum token_type type = token->type;
 687         enum key_operation op = token->key.op;
 688         const char *value = &rules->buf[token->key.value_off];
 689         const char *attr = &rules->buf[token->key.attr_off];
 690
 691         switch (type) {
 692         case TK_RULE:
 693                 {
 694                         const char *tks_ptr = (char *)rules->tokens;
 695                         const char *tk_ptr = (char *)token;
 696                         unsigned int off = tk_ptr - tks_ptr;
 697
 698                         dbg(rules->udev, "* RULE '%s', off: %u(%u), next: %u, label: '%s'\n",
 699                             &rules->buf[token->rule.filename_off],
 700                             off / (unsigned int) sizeof(struct token), off,
 701                             token->rule.next_rule,
 702                             &rules->buf[token->rule.label_off]);
 703                         break;
 704                 }
 705         case TK_M_ACTION:
 706         case TK_M_DEVPATH:
 707         case TK_M_KERNEL:
 708         case TK_M_SUBSYSTEM:
 709         case TK_M_DRIVER:
 710         case TK_M_WAITFOR:
 711         case TK_M_DEVLINK:
 712         case TK_M_NAME:
 713         case TK_M_KERNELS:
 714         case TK_M_SUBSYSTEMS:
 715         case TK_M_DRIVERS:
 716         case TK_M_PROGRAM:
 717         case TK_M_IMPORT_FILE:
 718         case TK_M_IMPORT_PROG:
 719         case TK_M_IMPORT_PARENT:
 720         case TK_M_RESULT:
 721         case TK_A_NAME:
 722         case TK_A_DEVLINK:
 723         case TK_A_OWNER:
 724         case TK_A_GROUP:
 725         case TK_A_MODE:
 726         case TK_A_RUN:
 727                 dbg(rules->udev, "%s %s '%s'\n", token_str[type], operation_str[op], value);
 728                 break;
 729         case TK_M_ATTR:
 730         case TK_M_ATTRS:
 731         case TK_M_ENV:
 732         case TK_A_ATTR:
 733         case TK_A_ENV:
 734                 dbg(rules->udev, "%s %s '%s' '%s'\n", token_str[type], operation_str[op], attr, value);
 735                 break;
 736         case TK_A_IGNORE_DEVICE:
 737         case TK_A_STRING_ESCAPE_NONE:
 738         case TK_A_STRING_ESCAPE_REPLACE:
 739         case TK_A_LAST_RULE:
 740         case TK_A_IGNORE_REMOVE:
 741                 dbg(rules->udev, "%s\n", token_str[type]);
 742                 break;
 743         case TK_M_TEST:
 744                 dbg(rules->udev, "%s %s '%s' %#o\n", token_str[type], operation_str[op], value, token->key.mode);
 745                 break;
 746         case TK_A_NUM_FAKE_PART:
 747                 dbg(rules->udev, "%s %u\n", token_str[type], token->key.num_fake_part);
 748                 break;
 749         case TK_A_DEVLINK_PRIO:
 750                 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.devlink_prio);
 751                 break;
 752         case TK_A_OWNER_ID:
 753                 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.uid);
 754                 break;
 755         case TK_A_GROUP_ID:
 756                 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.gid);
 757                 break;
 758         case TK_A_MODE_ID:
 759                 dbg(rules->udev, "%s %s %#o\n", token_str[type], operation_str[op], token->key.mode);
 760                 break;
 761         case TK_A_EVENT_TIMEOUT:
 762                 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.event_timeout);
 763                 break;
 764         case TK_A_GOTO:
 765                 dbg(rules->udev, "%s '%s' %u\n", token_str[type], value, token->key.rule_goto);
 766                 break;
 767         case TK_END:
 768                 dbg(rules->udev, "* %s\n", token_str[type]);
 769                 break;
 770         case TK_PARENTS_MAX:
 771         case TK_UNDEF:
 772                 dbg(rules->udev, "unknown type %u\n", type);
 773                 break;
 774         }
 775 }
 776
 777 static void dump_rules(struct udev_rules *rules)
 778 {
 779         unsigned int i;
 780
 781         dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
 782             rules->token_cur,
 783             rules->token_cur * sizeof(struct token),
 784             rules->buf_count,
 785             rules->buf_cur);
 786         for(i = 0; i < rules->token_cur; i++)
 787                 dump_token(rules, &rules->tokens[i]);
 788 }
 789 #else
 790 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
 791 static inline void dump_rules(struct udev_rules *rules) {}
 792 #endif /* DEBUG */
 793
 794 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
 795 {
 796         unsigned int i;
 797         unsigned int start = 0;
 798         unsigned int end = rule_tmp->token_cur;
 799
 800         for (i = 0; i < rule_tmp->token_cur; i++) {
 801                 enum token_type next_val = TK_UNDEF;
 802                 unsigned int next_idx;
 803                 unsigned int j;
 804
 805                 /* find smallest value */
 806                 for (j = start; j < end; j++) {
 807                         if (rule_tmp->token[j].type == TK_UNDEF)
 808                                 continue;
 809                         if (next_val == TK_UNDEF || rule_tmp->token[j].type < next_val) {
 810                                 next_val = rule_tmp->token[j].type;
 811                                 next_idx = j;
 812                         }
 813                 }
 814
 815                 /* add token and mark done */
 816                 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
 817                         return -1;
 818                 rule_tmp->token[next_idx].type = TK_UNDEF;
 819
 820                 /* shrink range */
 821                 if (next_idx == start)
 822                         start++;
 823                 if (next_idx+1 == end)
 824                         end--;
 825         }
 826         return 0;
 827 }
 828
 829 static int add_rule(struct udev_rules *rules, char *line,
 830                     const char *filename, unsigned int filename_off, unsigned int lineno)
 831 {
 832         int valid = 0;
 833         char *linepos;
 834         char *attr;
 835         int physdev = 0;
 836         struct rule_tmp rule_tmp;
 837
 838         memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
 839         rule_tmp.rules = rules;
 840         rule_tmp.rule.type = TK_RULE;
 841         rule_tmp.rule.rule.filename_off = filename_off;
 842
 843         linepos = line;
 844         while (1) {
 845                 char *key;
 846                 char *value;
 847                 enum key_operation op = KEY_OP_UNSET;
 848
 849                 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
 850                         break;
 851
 852                 if (strcasecmp(key, "ACTION") == 0) {
 853                         if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
 854                                 err(rules->udev, "invalid ACTION operation\n");
 855                                 goto invalid;
 856                         }
 857                         rule_add_token(&rule_tmp, TK_M_ACTION, op, value, NULL);
 858                         valid = 1;
 859                         continue;
 860                 }
 861
 862                 if (strcasecmp(key, "DEVPATH") == 0) {
 863                         if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
 864                                 err(rules->udev, "invalid DEVPATH operation\n");
 865                                 goto invalid;
 866                         }
 867                         rule_add_token(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
 868                         valid = 1;
 869                         continue;
 870                 }
 871
 872                 if (strcasecmp(key, "KERNEL") == 0) {
 873                         if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
 874                                 err(rules->udev, "invalid KERNEL operation\n");
 875                                 goto invalid;
 876                         }
 877                         rule_add_token(&rule_tmp, TK_M_KERNEL, op, value, NULL);
 878                         valid = 1;
 879                         continue;
 880                 }
 881
 882                 if (strcasecmp(key, "SUBSYSTEM") == 0) {
 883                         if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
 884                                 err(rules->udev, "invalid SUBSYSTEM operation\n");
 885                                 goto invalid;
 886                         }
 887                         /* bus, class, subsystem events should all be the same */
 888                         if (strcmp(value, "subsystem") == 0 ||
 889                             strcmp(value, "bus") == 0 ||
 890                             strcmp(value, "class") == 0) {
 891                                 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
 892                                         err(rules->udev, "'%s' must be specified as 'subsystem' \n"
 893                                             "please fix it in %s:%u", value, filename, lineno);
 894                                 rule_add_token(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
 895                         } else
 896                                 rule_add_token(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
 897                         valid = 1;
 898                         continue;
 899                 }
 900
 901                 if (strcasecmp(key, "DRIVER") == 0) {
 902                         if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
 903                                 err(rules->udev, "invalid DRIVER operation\n");
 904                                 goto invalid;
 905                         }
 906                         rule_add_token(&rule_tmp, TK_M_DRIVER, op, value, NULL);
 907                         valid = 1;
 908                         continue;
 909                 }
 910
 911                 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
 912                         attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
 913                         if (attr == NULL) {
 914                                 err(rules->udev, "error parsing ATTR attribute\n");
 915                                 goto invalid;
 916                         }
 917                         if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) {
 918                                 rule_add_token(&rule_tmp, TK_M_ATTR, op, value, attr);
 919                         } else {
 920                                 rule_add_token(&rule_tmp, TK_A_ATTR, op, value, attr);
 921                         }
 922                         valid = 1;
 923                         continue;
 924                 }
 925
 926                 if (strcasecmp(key, "KERNELS") == 0 ||
 927                     strcasecmp(key, "ID") == 0) {
 928                         if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
 929                                 err(rules->udev, "invalid KERNELS operation\n");
 930                                 goto invalid;
 931                         }
 932                         rule_add_token(&rule_tmp, TK_M_KERNELS, op, value, NULL);
 933                         valid = 1;
 934                         continue;
 935                 }
 936
 937                 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
 938                     strcasecmp(key, "BUS") == 0) {
 939                         if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
 940                                 err(rules->udev, "invalid SUBSYSTEMS operation\n");
 941                                 goto invalid;
 942                         }
 943                         rule_add_token(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
 944                         valid = 1;
 945                         continue;
 946                 }
 947
 948                 if (strcasecmp(key, "DRIVERS") == 0) {
 949                         if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
 950                                 err(rules->udev, "invalid DRIVERS operation\n");
 951                                 goto invalid;
 952                         }
 953                         rule_add_token(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
 954                         valid = 1;
 955                         continue;
 956                 }
 957
 958                 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
 959                     strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
 960                         if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
 961                                 err(rules->udev, "invalid ATTRS operation\n");
 962                                 goto invalid;
 963                         }
 964                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
 965                         if (attr == NULL) {
 966                                 err(rules->udev, "error parsing ATTRS attribute\n");
 967                                 goto invalid;
 968                         }
 969                         if (strncmp(attr, "device/", 7) == 0)
 970                                 err(rules->udev, "the 'device' link may not be available in a future kernel, "
 971                                     "please fix it in %s:%u", filename, lineno);
 972                         else if (strstr(attr, "../") != NULL)
 973                                 err(rules->udev, "do not reference parent sysfs directories directly, "
 974                                     "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
 975                         rule_add_token(&rule_tmp, TK_M_ATTRS, op, value, attr);
 976                         valid = 1;
 977                         continue;
 978                 }
 979
 980                 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
 981                         attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
 982                         if (attr == NULL) {
 983                                 err(rules->udev, "error parsing ENV attribute\n");
 984                                 goto invalid;
 985                         }
 986                         if (strncmp(attr, "PHYSDEV", 7) == 0)
 987                                 physdev = 1;
 988                         if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) {
 989                                 if (rule_add_token(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
 990                                         goto invalid;
 991                         } else {
 992                                 if (rule_add_token(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
 993                                         goto invalid;
 994                         }
 995                         valid = 1;
 996                         continue;
 997                 }
 998
 999                 if (strcasecmp(key, "PROGRAM") == 0) {
1000                         rule_add_token(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1001                         valid = 1;
1002                         continue;
1003                 }
1004
1005                 if (strcasecmp(key, "RESULT") == 0) {
1006                         if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
1007                                 err(rules->udev, "invalid RESULT operation\n");
1008                                 goto invalid;
1009                         }
1010                         rule_add_token(&rule_tmp, TK_M_RESULT, op, value, NULL);
1011                         valid = 1;
1012                         continue;
1013                 }
1014
1015                 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1016                         attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1017                         if (attr != NULL && strstr(attr, "program")) {
1018                                 dbg(rules->udev, "IMPORT will be executed\n");
1019                                 rule_add_token(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1020                                 valid = 1;
1021                         } else if (attr != NULL && strstr(attr, "file")) {
1022                                 dbg(rules->udev, "IMPORT will be included as file\n");
1023                                 rule_add_token(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1024                                 valid = 1;
1025                         } else if (attr != NULL && strstr(attr, "parent")) {
1026                                 dbg(rules->udev, "IMPORT will include the parent values\n");
1027                                 rule_add_token(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1028                                 valid = 1;
1029                         } else {
1030                                 /* figure it out if it is executable */
1031                                 char file[UTIL_PATH_SIZE];
1032                                 char *pos;
1033                                 struct stat statbuf;
1034
1035                                 util_strlcpy(file, value, sizeof(file));
1036                                 pos = strchr(file, ' ');
1037                                 if (pos)
1038                                         pos[0] = '\0';
1039
1040                                 /* allow programs in /lib/udev called without the path */
1041                                 if (strchr(file, '/') == NULL) {
1042                                         util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));
1043                                         util_strlcat(file, value, sizeof(file));
1044                                         pos = strchr(file, ' ');
1045                                         if (pos)
1046                                                 pos[0] = '\0';
1047                                 }
1048
1049                                 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1050                                 if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
1051                                         dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1052                                         rule_add_token(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1053                                         valid = 1;
1054                                 } else {
1055                                         dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1056                                         rule_add_token(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1057                                         valid = 1;
1058                                 }
1059                         }
1060                         continue;
1061                 }
1062
1063                 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1064                         mode_t mode = 0;
1065
1066                         if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
1067                                 err(rules->udev, "invalid TEST operation\n");
1068                                 goto invalid;
1069                         }
1070                         attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1071                         if (attr != NULL) {
1072                                 mode = strtol(attr, NULL, 8);
1073                                 rule_add_token(&rule_tmp, TK_M_TEST, op, value, &mode);
1074                         } else {
1075                                 rule_add_token(&rule_tmp, TK_M_TEST, op, value, NULL);
1076                         }
1077                         valid = 1;
1078                         continue;
1079                 }
1080
1081                 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1082                         int flag = 0;
1083
1084                         attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1085                         if (attr != NULL && strstr(attr, "ignore_error"))
1086                                 flag = 1;
1087                         rule_add_token(&rule_tmp, TK_A_RUN, op, value, &flag);
1088                         valid = 1;
1089                         continue;
1090                 }
1091
1092                 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1093                         rule_add_token(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1094                         valid = 1;
1095                         continue;
1096                 }
1097
1098                 if (strcasecmp(key, "LABEL") == 0) {
1099                         rule_tmp.rule.rule.label_off = add_string(rules, value);
1100                         valid = 1;
1101                         continue;
1102                 }
1103
1104                 if (strcasecmp(key, "GOTO") == 0) {
1105                         rule_add_token(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1106                         valid = 1;
1107                         continue;
1108                 }
1109
1110                 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1111                         if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) {
1112                                 rule_add_token(&rule_tmp, TK_M_NAME, op, value, NULL);
1113                         } else {
1114                                 if (value[0] == '\0')
1115                                         dbg(rules->udev, "name empty, node creation suppressed\n");
1116                                 rule_add_token(&rule_tmp, TK_A_NAME, op, value, NULL);
1117                                 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1118                                 if (attr != NULL) {
1119                                         if (strstr(attr, "all_partitions") != NULL) {
1120                                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1121
1122                                                 dbg(rules->udev, "creation of partition nodes requested\n");
1123                                                 rule_add_token(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1124                                         }
1125                                         if (strstr(attr, "ignore_remove") != NULL) {
1126                                                 dbg(rules->udev, "remove event should be ignored\n");
1127                                                 rule_add_token(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1128                                         }
1129                                 }
1130                         }
1131                         continue;
1132                 }
1133
1134                 if (strcasecmp(key, "SYMLINK") == 0) {
1135                         if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH)
1136                                         rule_add_token(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1137                                 else
1138                                         rule_add_token(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1139                                 valid = 1;
1140                                 continue;
1141                         }
1142
1143                 if (strcasecmp(key, "OWNER") == 0) {
1144                         uid_t uid;
1145                         char *endptr;
1146
1147                         uid = strtoul(value, &endptr, 10);
1148                         if (endptr[0] == '\0') {
1149                                 rule_add_token(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1150                         } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1151                                 uid = util_lookup_user(rules->udev, value);
1152                                 rule_add_token(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1153                         } else {
1154                                 rule_add_token(&rule_tmp, TK_A_OWNER, op, value, NULL);
1155                         }
1156                         valid = 1;
1157                         continue;
1158                 }
1159
1160                 if (strcasecmp(key, "GROUP") == 0) {
1161                         gid_t gid;
1162                         char *endptr;
1163
1164                         gid = strtoul(value, &endptr, 10);
1165                         if (endptr[0] == '\0') {
1166                                 rule_add_token(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1167                         } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1168                                 gid = util_lookup_group(rules->udev, value);
1169                                 rule_add_token(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1170                         } else {
1171                                 rule_add_token(&rule_tmp, TK_A_GROUP, op, value, NULL);
1172                         }
1173                         valid = 1;
1174                         continue;
1175                 }
1176
1177                 if (strcasecmp(key, "MODE") == 0) {
1178                         mode_t mode;
1179                         char *endptr;
1180
1181                         mode = strtol(value, &endptr, 8);
1182                         if (endptr[0] == '\0')
1183                                 rule_add_token(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1184                         else
1185                                 rule_add_token(&rule_tmp, TK_A_MODE, op, value, NULL);
1186                         valid = 1;
1187                         continue;
1188                 }
1189
1190                 if (strcasecmp(key, "OPTIONS") == 0) {
1191                         const char *pos;
1192
1193                         if (strstr(value, "last_rule") != NULL) {
1194                                 dbg(rules->udev, "last rule to be applied\n");
1195                                 rule_add_token(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1196                         }
1197                         if (strstr(value, "ignore_device") != NULL) {
1198                                 dbg(rules->udev, "device should be ignored\n");
1199                                 rule_add_token(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1200                         }
1201                         if (strstr(value, "ignore_remove") != NULL) {
1202                                 dbg(rules->udev, "remove event should be ignored\n");
1203                                 rule_add_token(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1204                         }
1205                         pos = strstr(value, "link_priority=");
1206                         if (pos != NULL) {
1207                                 int prio = atoi(&pos[strlen("link_priority=")]);
1208
1209                                 rule_add_token(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1210                                 dbg(rules->udev, "link priority=%i\n", prio);
1211                         }
1212                         pos = strstr(value, "event_timeout=");
1213                         if (pos != NULL) {
1214                                 int tout = atoi(&pos[strlen("event_timeout=")]);
1215
1216                                 rule_add_token(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1217                                 dbg(rules->udev, "event timout=%i\n", tout);
1218                         }
1219                         pos = strstr(value, "string_escape=");
1220                         if (pos != NULL) {
1221                                 pos = &pos[strlen("string_escape=")];
1222                                 if (strncmp(pos, "none", strlen("none")) == 0)
1223                                         rule_add_token(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1224                                 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1225                                         rule_add_token(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1226                         }
1227                         if (strstr(value, "all_partitions") != NULL) {
1228                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1229
1230                                 rule_add_token(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1231                                 dbg(rules->udev, "creation of partition nodes requested\n");
1232                         }
1233                         valid = 1;
1234                         continue;
1235                 }
1236                 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1237         }
1238
1239         if (physdev)
1240                 err(rules->udev, "PHYSDEV* values are deprecated and not available on recent kernels, \n"
1241                     "please fix it in %s:%u", filename, lineno);
1242
1243         /* skip line if not any valid key was found */
1244         if (!valid)
1245                 goto invalid;
1246
1247         /* add rule token */
1248         if (add_token(rules, &rule_tmp.rule) != 0)
1249                 goto invalid;
1250
1251         /* add tokens to list, sorted by type */
1252         if (sort_token(rules, &rule_tmp) != 0)
1253                 goto invalid;
1254         return 0;
1255 invalid:
1256         err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1257         return -1;
1258 }
1259
1260 static int parse_file(struct udev_rules *rules, const char *filename)
1261 {
1262         FILE *f;
1263         unsigned int filename_off;
1264         unsigned int first_token;
1265         char line[UTIL_LINE_SIZE];
1266         int line_nr = 0;
1267         unsigned int i;
1268
1269         info(rules->udev, "reading '%s' as rules file\n", filename);
1270
1271         f = fopen(filename, "r");
1272         if (f == NULL)
1273                 return -1;
1274
1275         filename_off = add_string(rules, filename);
1276         first_token = rules->token_cur;
1277
1278         while(fgets(line, sizeof(line), f) != NULL) {
1279                 char *key;
1280                 size_t len;
1281
1282                 /* skip whitespace */
1283                 line_nr++;
1284                 key = line;
1285                 while (isspace(key[0]))
1286                         key++;
1287
1288                 /* comment */
1289                 if (key[0] == '#')
1290                         continue;
1291
1292                 len = strlen(line);
1293                 if (len < 3)
1294                         continue;
1295
1296                 /* continue reading if backslash+newline is found */
1297                 while (line[len-2] == '\\') {
1298                         if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1299                                 break;
1300                         line_nr++;
1301                         len = strlen(line);
1302                 }
1303
1304                 if (len+1 >= sizeof(line)) {
1305                         err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1306                         continue;
1307                 }
1308                 add_rule(rules, key, filename, filename_off, line_nr);
1309         }
1310         fclose(f);
1311
1312         /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1313         for (i = first_token+1; i < rules->token_cur; i++) {
1314                 if (rules->tokens[i].type == TK_A_GOTO) {
1315                         char *label = &rules->buf[rules->tokens[i].key.value_off];
1316                         unsigned int j;
1317
1318                         for (j = i+1; j < rules->token_cur; j++) {
1319                                 if (rules->tokens[j].type != TK_RULE)
1320                                         continue;
1321                                 if (rules->tokens[j].rule.label_off == 0)
1322                                         continue;
1323                                 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1324                                         continue;
1325                                 rules->tokens[i].key.rule_goto = j;
1326                         }
1327                         if (rules->tokens[i].key.rule_goto == 0)
1328                                 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1329                 }
1330         }
1331         return 0;
1332 }
1333
1334 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1335 {
1336         struct dirent *ent;
1337         DIR *dir;
1338         char filename[UTIL_PATH_SIZE];
1339
1340         dbg(udev, "open directory '%s'\n", dirname);
1341         dir = opendir(dirname);
1342         if (dir == NULL) {
1343                 err(udev, "unable to open '%s': %m\n", dirname);
1344                 return -1;
1345         }
1346
1347         while (1) {
1348                 ent = readdir(dir);
1349                 if (ent == NULL || ent->d_name[0] == '\0')
1350                         break;
1351
1352                 if ((ent->d_name[0] == '.') || (ent->d_name[0] == '#'))
1353                         continue;
1354
1355                 /* look for file matching with specified suffix */
1356                 if (suffix != NULL) {
1357                         const char *ext;
1358
1359                         ext = strrchr(ent->d_name, '.');
1360                         if (ext == NULL)
1361                                 continue;
1362                         if (strcmp(ext, suffix) != 0)
1363                                 continue;
1364                 }
1365                 dbg(udev, "put file '%s/%s' into list\n", dirname, ent->d_name);
1366
1367                 snprintf(filename, sizeof(filename), "%s/%s", dirname, ent->d_name);
1368                 filename[sizeof(filename)-1] = '\0';
1369                 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1370         }
1371
1372         closedir(dir);
1373         return 0;
1374 }
1375
1376 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1377 {
1378         struct udev_rules *rules;
1379         struct stat statbuf;
1380         char filename[PATH_MAX];
1381         struct udev_list_node file_list;
1382         struct udev_list_entry *file_loop, *file_tmp;
1383         unsigned int prev_rule;
1384         struct token end_token;
1385         unsigned int i;
1386
1387         rules = malloc(sizeof(struct udev_rules));
1388         if (rules == NULL)
1389                 return NULL;
1390         memset(rules, 0x00, sizeof(struct udev_rules));
1391         rules->udev = udev;
1392         rules->resolve_names = resolve_names;
1393         udev_list_init(&file_list);
1394
1395         /* init token array and string buffer */
1396         rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1397         if (rules->tokens == NULL)
1398                 return NULL;
1399         rules->token_max = PREALLOC_TOKEN;
1400         rules->buf = malloc(PREALLOC_STRBUF);
1401         if (rules->buf == NULL)
1402                 return NULL;
1403         rules->buf_max = PREALLOC_STRBUF;
1404         /* offset 0 is always '\0' */
1405         rules->buf[0] = '\0';
1406         rules->buf_cur = 1;
1407         info(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1408              rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1409
1410         if (udev_get_rules_path(udev) != NULL) {
1411                 /* custom rules location for testing */
1412                 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1413         } else {
1414                 struct udev_list_node sort_list;
1415                 struct udev_list_entry *sort_loop, *sort_tmp;
1416
1417                 /* read user/custom rules */
1418                 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1419
1420                 /* read dynamic/temporary rules */
1421                 util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
1422                 util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
1423                 if (stat(filename, &statbuf) != 0) {
1424                         util_create_path(udev, filename);
1425                         udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1426                         mkdir(filename, 0755);
1427                         udev_selinux_resetfscreatecon(udev);
1428                 }
1429                 udev_list_init(&sort_list);
1430                 add_matching_files(udev, &sort_list, filename, ".rules");
1431
1432                 /* read default rules */
1433                 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1434
1435                 /* sort all rules files by basename into list of files */
1436                 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1437                         const char *sort_name = udev_list_entry_get_name(sort_loop);
1438                         const char *sort_base = strrchr(sort_name, '/');
1439
1440                         if (sort_base == NULL)
1441                                 continue;
1442
1443                         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1444                                 const char *file_name = udev_list_entry_get_name(file_loop);
1445                                 const char *file_base = strrchr(file_name, '/');
1446
1447                                 if (file_base == NULL)
1448                                         continue;
1449                                 if (strcmp(file_base, sort_base) == 0) {
1450                                         info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1451                                              file_name, sort_name);
1452                                         udev_list_entry_remove(sort_loop);
1453                                         sort_loop = NULL;
1454                                         break;
1455                                 }
1456                                 if (strcmp(file_base, sort_base) > 0)
1457                                         break;
1458                         }
1459                         if (sort_loop != NULL)
1460                                 udev_list_entry_move_before(sort_loop, file_loop);
1461                 }
1462         }
1463
1464         /* parse list of files */
1465         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1466                 const char *file_name = udev_list_entry_get_name(file_loop);
1467
1468                 if (stat(file_name, &statbuf) == 0 && statbuf.st_size > 0)
1469                         parse_file(rules, file_name);
1470                 else
1471                         info(udev, "can not read '%s'\n", file_name);
1472                 udev_list_entry_remove(file_loop);
1473         }
1474
1475         memset(&end_token, 0x00, sizeof(struct token));
1476         end_token.type = TK_END;
1477         add_token(rules, &end_token);
1478
1479         /* shrink allocate buffers */
1480         if (rules->token_cur < rules->token_max) {
1481                 struct token *tokens;
1482
1483                 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1484                 if (tokens != NULL || rules->token_cur == 0) {
1485                         rules->tokens = tokens;
1486                         rules->token_max = rules->token_cur;
1487                 }
1488         }
1489         if (rules->buf_cur < rules->buf_max) {
1490                 char *buf;
1491
1492                 buf = realloc(rules->buf, rules->buf_cur);
1493                 if (buf != NULL || rules->buf_cur == 0) {
1494                         rules->buf = buf;
1495                         rules->buf_max = rules->buf_cur;
1496                 }
1497         }
1498         info(udev, "shrunk to %lu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1499              rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1500
1501         /* link all TK_RULE tokens to be able to fast-forward to next TK_RULE */
1502         prev_rule = 0;
1503         for (i = 1; i < rules->token_cur; i++) {
1504                 if (rules->tokens[i].type == TK_RULE) {
1505                         rules->tokens[prev_rule].rule.next_rule = i;
1506                         prev_rule = i;
1507                 }
1508         }
1509         dump_rules(rules);
1510         return rules;
1511 }
1512
1513 void udev_rules_unref(struct udev_rules *rules)
1514 {
1515         if (rules == NULL)
1516                 return;
1517         free(rules->tokens);
1518         free(rules->buf);
1519         free(rules);
1520 }
1521
1522 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1523 {
1524         const char *key_name = token_str[token->type];
1525         char *key_value = &rules->buf[token->key.value_off];
1526         char *pos;
1527         int match = 0;
1528
1529         if (val == NULL)
1530                 val = "";
1531
1532         /* look for a matching string, parts are separated by '|' */
1533         if (strchr(key_value, '|') != NULL) {
1534                 char value[UTIL_PATH_SIZE];
1535
1536                 util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value));
1537                 key_value = value;
1538                 while (key_value != NULL) {
1539                         pos = strchr(key_value, '|');
1540                         if (pos != NULL) {
1541                                 pos[0] = '\0';
1542                                 pos = &pos[1];
1543                         }
1544                         dbg(rules->udev, "match %s '%s' <-> '%s'\n", key_name, key_value, val);
1545                         match = (fnmatch(key_value, val, 0) == 0);
1546                         if (match)
1547                                 break;
1548                         key_value = pos;
1549                 }
1550         } else {
1551                 match = (fnmatch(key_value, val, 0) == 0);
1552         }
1553
1554         if (match && (token->key.op == KEY_OP_MATCH)) {
1555                 dbg(rules->udev, "%s is true (matching value)\n", key_name);
1556                 return 0;
1557         }
1558         if (!match && (token->key.op == KEY_OP_NOMATCH)) {
1559                 dbg(rules->udev, "%s is true (non-matching value)\n", key_name);
1560                 return 0;
1561         }
1562         dbg(rules->udev, "%s is not true\n", key_name);
1563         return -1;
1564 }
1565
1566 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1567 {
1568         char attr[UTIL_PATH_SIZE];
1569         const char *key_name = &rules->buf[cur->key.attr_off];
1570         const char *key_value = &rules->buf[cur->key.value_off];
1571         char value[UTIL_NAME_SIZE] = "";
1572         size_t len;
1573
1574         util_strlcpy(attr, key_name, sizeof(attr));
1575         util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
1576         if (value[0] == '\0') {
1577                 const char *val;
1578
1579                 val = udev_device_get_sysattr_value(dev, key_name);
1580                 if (val != NULL)
1581                         util_strlcpy(value, val, sizeof(value));
1582         }
1583         if (value[0]=='\0')
1584                 return -1;
1585
1586         /* strip trailing whitespace of value, if not asked to match for it */
1587         len = strlen(key_value);
1588         if (len > 0 && !isspace(key_value[len-1])) {
1589                 len = strlen(value);
1590                 while (len > 0 && isspace(value[--len]))
1591                         value[len] = '\0';
1592                 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1593         }
1594         return match_key(rules, cur, value);
1595 }
1596
1597 enum escape_type {
1598         ESCAPE_UNSET,
1599         ESCAPE_NONE,
1600         ESCAPE_REPLACE,
1601 };
1602
1603 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
1604 {
1605         struct token *cur;
1606         struct token *rule;
1607
1608         if (rules->tokens == NULL)
1609                 return -1;
1610
1611         /* loop through token list, match, run actions or forward to next rule */
1612         cur = &rules->tokens[0];
1613         rule = cur;
1614         while (cur != NULL && cur->type != TK_END) {
1615                 enum escape_type esc = ESCAPE_UNSET;
1616                 unsigned int idx;
1617
1618                 dump_token(rules, cur);
1619                 switch (cur->type) {
1620                 case TK_RULE:
1621                         /* current rule */
1622                         rule = cur;
1623                         esc = ESCAPE_UNSET;
1624                         break;
1625                 case TK_M_ACTION:
1626                         if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1627                                 goto nomatch;
1628                         break;
1629                 case TK_M_DEVPATH:
1630                         if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1631                                 goto nomatch;
1632                         break;
1633                 case TK_M_KERNEL:
1634                         if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1635                                 goto nomatch;
1636                         break;
1637                 case TK_M_DEVLINK:
1638                         {
1639                                 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
1640                                 struct udev_list_entry *list_entry;
1641                                 int match = 0;
1642
1643                                 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1644                                         const char *devlink;
1645
1646                                         devlink =  &udev_list_entry_get_name(list_entry)[devlen];
1647                                         if (match_key(rules, cur, devlink) == 0) {
1648                                                 match = 1;
1649                                                 break;
1650                                         }
1651                                 }
1652                                 if (!match)
1653                                         goto nomatch;
1654                                 break;
1655                         }
1656                 case TK_M_NAME:
1657                         if (match_key(rules, cur, event->name) != 0)
1658                                 goto nomatch;
1659                         break;
1660                 case TK_M_ENV:
1661                         {
1662                                 struct udev_list_entry *list_entry;
1663                                 const char *key_name = &rules->buf[cur->key.attr_off];
1664                                 const char *value;
1665
1666                                 list_entry = udev_device_get_properties_list_entry(event->dev);
1667                                 list_entry = udev_list_entry_get_by_name(list_entry, key_name);
1668                                 value = udev_list_entry_get_value(list_entry);
1669                                 if (value == NULL) {
1670                                         dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
1671                                         value = "";
1672                                 }
1673                                 if (match_key(rules, cur, value))
1674                                         goto nomatch;
1675                                 break;
1676                         }
1677                 case TK_M_SUBSYSTEM:
1678                         if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1679                                 goto nomatch;
1680                         break;
1681                 case TK_M_DRIVER:
1682                         if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1683                                 goto nomatch;
1684                         break;
1685                 case TK_M_WAITFOR:
1686                         {
1687                                 char filename[UTIL_PATH_SIZE];
1688                                 int found;
1689
1690                                 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
1691                                 udev_event_apply_format(event, filename, sizeof(filename));
1692                                 found = (wait_for_file(event->dev, filename, 10) == 0);
1693                                 if (!found && (cur->key.op != KEY_OP_NOMATCH))
1694                                         goto nomatch;
1695                                 break;
1696                         }
1697                 case TK_M_ATTR:
1698                         if (match_attr(rules, event->dev, event, cur) != 0)
1699                                 goto nomatch;
1700                         break;
1701                 case TK_M_KERNELS:
1702                 case TK_M_SUBSYSTEMS:
1703                 case TK_M_DRIVERS:
1704                 case TK_M_ATTRS:
1705                         {
1706                                 struct token *next;
1707
1708                                 /* get whole sequence of parent matches */
1709                                 next = cur;
1710                                 while (next->type < TK_PARENTS_MAX)
1711                                         next++;
1712
1713                                 /* loop over parents */
1714                                 event->dev_parent = event->dev;
1715                                 while (1) {
1716                                         struct token *key;
1717
1718                                         dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
1719                                         /* loop over sequence of parent match keys */
1720                                         for (key = cur; key < next; key++ ) {
1721                                                 dump_token(rules, key);
1722                                                 switch(key->type) {
1723                                                 case TK_M_KERNELS:
1724                                                         if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
1725                                                                 goto try_parent;
1726                                                         break;
1727                                                 case TK_M_SUBSYSTEMS:
1728                                                         if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
1729                                                                 goto try_parent;
1730                                                         break;
1731                                                 case TK_M_DRIVERS:
1732                                                         if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
1733                                                                 goto try_parent;
1734                                                         break;
1735                                                 case TK_M_ATTRS:
1736                                                         if (match_attr(rules, event->dev_parent, event, key) != 0)
1737                                                                 goto try_parent;
1738                                                         break;
1739                                                 default:
1740                                                         goto nomatch;
1741                                                 }
1742                                                 dbg(event->udev, "parent key matched\n");
1743                                         }
1744                                         dbg(event->udev, "all parent keys matched\n");
1745                                         /* all keys matched */
1746                                         break;
1747
1748                                 try_parent:
1749                                         event->dev_parent = udev_device_get_parent(event->dev_parent);
1750                                         if (event->dev_parent == NULL)
1751                                                 goto nomatch;
1752                                 }
1753                                 /* move behind our sequence of parent match keys */
1754                                 cur = next;
1755                                 continue;
1756                         }
1757                 case TK_M_TEST:
1758                         {
1759                                 char filename[UTIL_PATH_SIZE];
1760                                 struct stat statbuf;
1761                                 int match;
1762
1763                                 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
1764                                 udev_event_apply_format(event, filename, sizeof(filename));
1765                                 if (util_resolve_subsys_kernel(event->udev, NULL, filename, sizeof(filename), 0) != 0)
1766                                         if (filename[0] != '/') {
1767                                                 char tmp[UTIL_PATH_SIZE];
1768
1769                                                 util_strlcpy(tmp, udev_device_get_syspath(event->dev), sizeof(tmp));
1770                                                 util_strlcat(tmp, "/", sizeof(tmp));
1771                                                 util_strlcat(tmp, filename, sizeof(tmp));
1772                                                 util_strlcpy(filename, tmp, sizeof(filename));
1773                                         }
1774
1775                                 attr_subst_subdir(filename, sizeof(filename));
1776
1777                                 match = (stat(filename, &statbuf) == 0);
1778                                 info(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
1779                                 if (match && cur->key.mode > 0) {
1780                                         match = ((statbuf.st_mode & cur->key.mode) > 0);
1781                                         info(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
1782                                              match ? "matches" : "does not match", cur->key.mode);
1783                                 }
1784                                 if (match && cur->key.op == KEY_OP_NOMATCH)
1785                                         goto nomatch;
1786                                 if (!match && cur->key.op == KEY_OP_MATCH)
1787                                         goto nomatch;
1788                                 break;
1789                         }
1790                 case TK_M_PROGRAM:
1791                         {
1792                                 char program[UTIL_PATH_SIZE];
1793                                 char **envp;
1794                                 char result[UTIL_PATH_SIZE];
1795
1796                                 free(event->program_result);
1797                                 event->program_result = NULL;
1798                                 util_strlcpy(program, &rules->buf[cur->key.value_off], sizeof(program));
1799                                 udev_event_apply_format(event, program, sizeof(program));
1800                                 envp = udev_device_get_properties_envp(event->dev);
1801                                 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
1802                                         if (cur->key.op != KEY_OP_NOMATCH)
1803                                                 goto nomatch;
1804                                 } else {
1805                                         int count;
1806
1807                                         util_remove_trailing_chars(result, '\n');
1808                                         if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
1809                                                 count = util_replace_chars(result, ALLOWED_CHARS_INPUT);
1810                                                 if (count > 0)
1811                                                         info(event->udev, "%i character(s) replaced\n" , count);
1812                                         }
1813                                         event->program_result = strdup(result);
1814                                         dbg(event->udev, "storing result '%s'\n", event->program_result);
1815                                         if (cur->key.op == KEY_OP_NOMATCH)
1816                                                 goto nomatch;
1817                                 }
1818                                 break;
1819                         }
1820                 case TK_M_IMPORT_FILE:
1821                         {
1822                                 char import[UTIL_PATH_SIZE];
1823
1824                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
1825                                 udev_event_apply_format(event, import, sizeof(import));
1826                                 if (import_file_into_properties(event->dev, import) != 0)
1827                                         if (cur->key.op != KEY_OP_NOMATCH)
1828                                                 goto nomatch;
1829                                 break;
1830                         }
1831                 case TK_M_IMPORT_PROG:
1832                         {
1833                                 char import[UTIL_PATH_SIZE];
1834
1835                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
1836                                 udev_event_apply_format(event, import, sizeof(import));
1837                                 if (import_program_into_properties(event->dev, import) != 0)
1838                                         if (cur->key.op != KEY_OP_NOMATCH)
1839                                                 goto nomatch;
1840                                 break;
1841                         }
1842                 case TK_M_IMPORT_PARENT:
1843                         {
1844                                 char import[UTIL_PATH_SIZE];
1845
1846                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
1847                                 udev_event_apply_format(event, import, sizeof(import));
1848                                 if (import_parent_into_properties(event->dev, import) != 0)
1849                                         if (cur->key.op != KEY_OP_NOMATCH)
1850                                                 goto nomatch;
1851                                 break;
1852                         }
1853                 case TK_M_RESULT:
1854                         if (match_key(rules, cur, event->program_result) != 0)
1855                                 goto nomatch;
1856                         break;
1857
1858                 case TK_A_IGNORE_DEVICE:
1859                         event->ignore_device = 1;
1860                         return 0;
1861                         break;
1862                 case TK_A_STRING_ESCAPE_NONE:
1863                         esc = ESCAPE_NONE;
1864                         break;
1865                 case TK_A_STRING_ESCAPE_REPLACE:
1866                         esc = ESCAPE_REPLACE;
1867                         break;
1868                 case TK_A_NUM_FAKE_PART:
1869                         if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
1870                                 break;
1871                         if (udev_device_get_sysnum(event->dev) != NULL)
1872                                 break;
1873                         udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
1874                         break;
1875                 case TK_A_DEVLINK_PRIO:
1876                         udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
1877                         break;
1878                 case TK_A_OWNER:
1879                         {
1880                                 char owner[UTIL_NAME_SIZE];
1881
1882                                 if (event->owner_final)
1883                                         break;
1884                                 if (cur->key.op == KEY_OP_ASSIGN_FINAL)
1885                                         event->owner_final = 1;
1886                                 util_strlcpy(owner,  &rules->buf[cur->key.value_off], sizeof(owner));
1887                                 udev_event_apply_format(event, owner, sizeof(owner));
1888                                 event->uid = util_lookup_user(event->udev, owner);
1889                                 break;
1890                         }
1891                 case TK_A_GROUP:
1892                         {
1893                                 char group[UTIL_NAME_SIZE];
1894
1895                                 if (event->group_final)
1896                                         break;
1897                                 if (cur->key.op == KEY_OP_ASSIGN_FINAL)
1898                                         event->group_final = 1;
1899                                 util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group));
1900                                 udev_event_apply_format(event, group, sizeof(group));
1901                                 event->gid = util_lookup_group(event->udev, group);
1902                                 break;
1903                         }
1904                 case TK_A_MODE:
1905                         {
1906                                 char mode[UTIL_NAME_SIZE];
1907                                 char *endptr;
1908
1909                                 if (event->mode_final)
1910                                         break;
1911                                 if (cur->key.op == KEY_OP_ASSIGN_FINAL)
1912                                         event->mode_final = 1;
1913                                 util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode));
1914                                 udev_event_apply_format(event, mode, sizeof(mode));
1915                                 event->mode = strtol(mode, &endptr, 8);
1916                                 if (endptr[0] != '\0') {
1917                                         err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
1918                                         event->mode = 0660;
1919                                 }
1920                                 break;
1921                         }
1922                 case TK_A_OWNER_ID:
1923                         if (event->owner_final)
1924                                 break;
1925                         if (cur->key.op == KEY_OP_ASSIGN_FINAL)
1926                                 event->owner_final = 1;
1927                         event->uid = cur->key.uid;
1928                         break;
1929                 case TK_A_GROUP_ID:
1930                         if (event->group_final)
1931                                 break;
1932                         if (cur->key.op == KEY_OP_ASSIGN_FINAL)
1933                                 event->group_final = 1;
1934                         event->gid = cur->key.gid;
1935                         break;
1936                 case TK_A_MODE_ID:
1937                         if (event->mode_final)
1938                                 break;
1939                         if (cur->key.op == KEY_OP_ASSIGN_FINAL)
1940                                 event->mode_final = 1;
1941                         event->mode = cur->key.mode;
1942                         break;
1943                 case TK_A_ENV:
1944                         {
1945                                 const char *name = &rules->buf[cur->key.attr_off];
1946                                 char *value = &rules->buf[cur->key.value_off];
1947
1948                                 if (value[0] != '\0') {
1949                                         char temp_value[UTIL_NAME_SIZE];
1950                                         struct udev_list_entry *entry;
1951
1952                                         util_strlcpy(temp_value, value, sizeof(temp_value));
1953                                         udev_event_apply_format(event, temp_value, sizeof(temp_value));
1954                                         entry = udev_device_add_property(event->dev, name, temp_value);
1955                                         /* store in db */
1956                                         udev_list_entry_set_flag(entry, 1);
1957                                 } else {
1958                                         udev_device_add_property(event->dev, name, NULL);
1959                                 }
1960                                 break;
1961                         }
1962                 case TK_A_NAME:
1963                         {
1964                                 const char *name  = &rules->buf[cur->key.value_off];
1965                                 char name_str[UTIL_PATH_SIZE];
1966                                 int count;
1967
1968                                 if (event->name_final)
1969                                         break;
1970                                 if (cur->key.op == KEY_OP_ASSIGN_FINAL)
1971                                         event->name_final = 1;
1972                                 if (name[0] == '\0') {
1973                                         free(event->name);
1974                                         event->name = NULL;
1975                                         break;
1976                                 }
1977                                 util_strlcpy(name_str, name, sizeof(name_str));
1978                                 udev_event_apply_format(event, name_str, sizeof(name_str));
1979                                 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
1980                                         count = util_replace_chars(name_str, ALLOWED_CHARS_FILE);
1981                                         if (count > 0)
1982                                                 info(event->udev, "%i character(s) replaced\n", count);
1983                                         free(event->name);
1984                                         event->name = strdup(name_str);
1985                                 }
1986                                 break;
1987                         }
1988                 case TK_A_DEVLINK:
1989                         {
1990                                 char temp[UTIL_PATH_SIZE];
1991                                 char filename[UTIL_PATH_SIZE];
1992                                 char *pos, *next;
1993                                 int count = 0;
1994
1995                                 if (event->devlink_final)
1996                                         break;
1997                                 if (major(udev_device_get_devnum(event->dev)) == 0)
1998                                         break;
1999                                 if (cur->key.op == KEY_OP_ASSIGN_FINAL)
2000                                         event->devlink_final = 1;
2001                                 if (cur->key.op == KEY_OP_ASSIGN || cur->key.op == KEY_OP_ASSIGN_FINAL)
2002                                         udev_device_cleanup_devlinks_list(event->dev);
2003
2004                                 /* allow  multiple symlinks separated by spaces */
2005                                 util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));
2006                                 udev_event_apply_format(event, temp, sizeof(temp));
2007                                 if (esc == ESCAPE_UNSET)
2008                                         count = util_replace_chars(temp, ALLOWED_CHARS_FILE " ");
2009                                 else if (esc == ESCAPE_REPLACE)
2010                                         count = util_replace_chars(temp, ALLOWED_CHARS_FILE);
2011                                 if (count > 0)
2012                                         info(event->udev, "%i character(s) replaced\n" , count);
2013                                 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2014                                 pos = temp;
2015                                 while (isspace(pos[0]))
2016                                         pos++;
2017                                 next = strchr(pos, ' ');
2018                                 while (next) {
2019                                         next[0] = '\0';
2020                                         info(event->udev, "add symlink '%s'\n", pos);
2021                                         util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2022                                         util_strlcat(filename, "/", sizeof(filename));
2023                                         util_strlcat(filename, pos, sizeof(filename));
2024                                         udev_device_add_devlink(event->dev, filename);
2025                                         while (isspace(next[1]))
2026                                                 next++;
2027                                         pos = &next[1];
2028                                         next = strchr(pos, ' ');
2029                                 }
2030                                 if (pos[0] != '\0') {
2031                                         info(event->udev, "add symlink '%s'\n", pos);
2032                                         util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2033                                         util_strlcat(filename, "/", sizeof(filename));
2034                                         util_strlcat(filename, pos, sizeof(filename));
2035                                         udev_device_add_devlink(event->dev, filename);
2036                                 }
2037                         }
2038                         break;
2039                 case TK_A_EVENT_TIMEOUT:
2040                         udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2041                         break;
2042                 case TK_A_IGNORE_REMOVE:
2043                         udev_device_set_ignore_remove(event->dev, 1);
2044                         break;
2045                 case TK_A_ATTR:
2046                         {
2047                                 const char *key_name = &rules->buf[cur->key.attr_off];
2048                                 char attr[UTIL_PATH_SIZE];
2049                                 char value[UTIL_NAME_SIZE];
2050                                 FILE *f;
2051
2052                                 util_strlcpy(attr, key_name, sizeof(attr));
2053                                 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) {
2054                                         util_strlcpy(attr, udev_device_get_syspath(event->dev), sizeof(attr));
2055                                         util_strlcat(attr, "/", sizeof(attr));
2056                                         util_strlcat(attr, key_name, sizeof(attr));
2057                                 }
2058
2059                                 attr_subst_subdir(attr, sizeof(attr));
2060
2061                                 util_strlcpy(value, &rules->buf[cur->key.value_off], sizeof(value));
2062                                 udev_event_apply_format(event, value, sizeof(value));
2063                                 info(event->udev, "writing '%s' to sysfs file '%s'\n", value, attr);
2064                                 f = fopen(attr, "w");
2065                                 if (f != NULL) {
2066                                         if (!event->test)
2067                                                 if (fprintf(f, "%s", value) <= 0)
2068                                                         err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2069                                         fclose(f);
2070                                 } else {
2071                                         err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2072                                 }
2073                                 break;
2074                         }
2075                 case TK_A_RUN:
2076                         {
2077                                 struct udev_list_entry *list_entry;
2078
2079                                 if (cur->key.op == KEY_OP_ASSIGN || cur->key.op == KEY_OP_ASSIGN_FINAL)
2080                                         udev_list_cleanup_entries(event->udev, &event->run_list);
2081                                 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2082                                                                  &rules->buf[cur->key.value_off], NULL, 1, 0);
2083                                 if (cur->key.ignore_error)
2084                                         udev_list_entry_set_flag(list_entry, 1);
2085                                 break;
2086                         }
2087                 case TK_A_GOTO:
2088                         cur = &rules->tokens[cur->key.rule_goto];
2089                         continue;
2090                 case TK_A_LAST_RULE:
2091                         break;
2092
2093                 case TK_PARENTS_MAX:
2094                 case TK_END:
2095                 case TK_UNDEF:
2096                         err(rules->udev, "wrong type %u\n", cur->type);
2097                         goto nomatch;
2098                 }
2099
2100                 cur++;
2101                 continue;
2102         nomatch:
2103                 /* fast-forward to next rule */
2104                 idx = rule->rule.next_rule;
2105                 if (idx == 0)
2106                         break;
2107                 dbg(rules->udev, "forward to rule: %u\n", idx);
2108                 cur = &rules->tokens[idx];
2109         }
2110         return 0;
2111 }