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 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
  35 enum operation_type {
  36         OP_UNSET,
  37
  38         OP_MATCH,
  39         OP_NOMATCH,
  40         OP_MATCH_MAX,
  41
  42         OP_ADD,
  43         OP_ASSIGN,
  44         OP_ASSIGN_FINAL,
  45 };
  46
  47 static const char *operation_str[] = {
  48         [OP_UNSET] =            "UNSET",
  49         [OP_MATCH] =            "match",
  50         [OP_NOMATCH] =          "nomatch",
  51         [OP_MATCH_MAX] =        "MATCH_MAX",
  52
  53         [OP_ADD] =              "add",
  54         [OP_ASSIGN] =           "assign",
  55         [OP_ASSIGN_FINAL] =     "assign-final",
  56 };
  57
  58 enum string_glob_type {
  59         GL_UNSET,
  60         GL_PLAIN,                       /* no special chars */
  61         GL_GLOB,                        /* shell globs ?,*,[] */
  62         GL_SPLIT,                       /* multi-value A|B */
  63         GL_SPLIT_GLOB,                  /* multi-value with glob A*|B* */
  64         GL_SOMETHING,                   /* commonly used "?*" */
  65         GL_FORMAT,
  66 };
  67
  68 #ifdef DEBUG
  69 static const char *string_glob_str[] = {
  70         [GL_UNSET] =            "UNSET",
  71         [GL_PLAIN] =            "plain",
  72         [GL_GLOB] =             "glob",
  73         [GL_SPLIT] =            "split",
  74         [GL_SPLIT_GLOB] =       "split-glob",
  75         [GL_SOMETHING] =        "split-glob",
  76         [GL_FORMAT] =           "format",
  77 };
  78 #endif
  79
  80 /* tokens of a rule are sorted/handled in this order */
  81 enum token_type {
  82         TK_UNSET,
  83         TK_RULE,
  84
  85         TK_M_ACTION,                    /* val */
  86         TK_M_DEVPATH,                   /* val */
  87         TK_M_KERNEL,                    /* val */
  88         TK_M_DEVLINK,                   /* val */
  89         TK_M_NAME,                      /* val */
  90         TK_M_ENV,                       /* val, attr */
  91         TK_M_SUBSYSTEM,                 /* val */
  92         TK_M_DRIVER,                    /* val */
  93         TK_M_WAITFOR,                   /* val */
  94         TK_M_ATTR,                      /* val, attr */
  95
  96         TK_M_KERNELS,                   /* val */
  97         TK_M_SUBSYSTEMS,                /* val */
  98         TK_M_DRIVERS,                   /* val */
  99         TK_M_ATTRS,                     /* val, attr */
 100         TK_M_PARENTS_MAX,
 101
 102         TK_M_TEST,                      /* val, mode_t */
 103         TK_M_PROGRAM,                   /* val */
 104         TK_M_IMPORT_FILE,               /* val */
 105         TK_M_IMPORT_PROG,               /* val */
 106         TK_M_IMPORT_PARENT,             /* val */
 107         TK_M_RESULT,                    /* val */
 108         TK_M_MAX,
 109
 110         TK_A_IGNORE_DEVICE,
 111         TK_A_STRING_ESCAPE_NONE,
 112         TK_A_STRING_ESCAPE_REPLACE,
 113         TK_A_NUM_FAKE_PART,             /* int */
 114         TK_A_DEVLINK_PRIO,              /* int */
 115         TK_A_OWNER,                     /* val */
 116         TK_A_GROUP,                     /* val */
 117         TK_A_MODE,                      /* val */
 118         TK_A_OWNER_ID,                  /* uid_t */
 119         TK_A_GROUP_ID,                  /* gid_t */
 120         TK_A_MODE_ID,                   /* mode_t */
 121         TK_A_ENV,                       /* val, attr */
 122         TK_A_NAME,                      /* val */
 123         TK_A_DEVLINK,                   /* val */
 124         TK_A_EVENT_TIMEOUT,             /* int */
 125         TK_A_IGNORE_REMOVE,
 126         TK_A_ATTR,                      /* val, attr */
 127         TK_A_RUN,                       /* val, bool */
 128         TK_A_GOTO,                      /* size_t */
 129         TK_A_LAST_RULE,
 130
 131         TK_END,
 132 };
 133
 134 static const char *token_str[] = {
 135         [TK_UNSET] =                    "UNSET",
 136         [TK_RULE] =                     "RULE",
 137
 138         [TK_M_ACTION] =                 "M ACTION",
 139         [TK_M_DEVPATH] =                "M DEVPATH",
 140         [TK_M_KERNEL] =                 "M KERNEL",
 141         [TK_M_DEVLINK] =                "M DEVLINK",
 142         [TK_M_NAME] =                   "M NAME",
 143         [TK_M_ENV] =                    "M ENV",
 144         [TK_M_SUBSYSTEM] =              "M SUBSYSTEM",
 145         [TK_M_DRIVER] =                 "M DRIVER",
 146         [TK_M_WAITFOR] =                "M WAITFOR",
 147         [TK_M_ATTR] =                   "M ATTR",
 148
 149         [TK_M_KERNELS] =                "M KERNELS",
 150         [TK_M_SUBSYSTEMS] =             "M SUBSYSTEMS",
 151         [TK_M_DRIVERS] =                "M DRIVERS",
 152         [TK_M_ATTRS] =                  "M ATTRS",
 153         [TK_M_PARENTS_MAX] =            "M PARENTS_MAX",
 154
 155         [TK_M_TEST] =                   "M TEST",
 156         [TK_M_PROGRAM] =                "M PROGRAM",
 157         [TK_M_IMPORT_FILE] =            "M IMPORT_FILE",
 158         [TK_M_IMPORT_PROG] =            "M IMPORT_PROG",
 159         [TK_M_IMPORT_PARENT] =          "M MPORT_PARENT",
 160         [TK_M_RESULT] =                 "M RESULT",
 161         [TK_M_MAX] =                    "M MAX",
 162
 163         [TK_A_IGNORE_DEVICE] =          "A IGNORE_DEVICE",
 164         [TK_A_STRING_ESCAPE_NONE] =     "A STRING_ESCAPE_NONE",
 165         [TK_A_STRING_ESCAPE_REPLACE] =  "A STRING_ESCAPE_REPLACE",
 166         [TK_A_NUM_FAKE_PART] =          "A NUM_FAKE_PART",
 167         [TK_A_DEVLINK_PRIO] =           "A DEVLINK_PRIO",
 168         [TK_A_OWNER] =                  "A OWNER",
 169         [TK_A_GROUP] =                  "A GROUP",
 170         [TK_A_MODE] =                   "A MODE",
 171         [TK_A_OWNER_ID] =               "A OWNER_ID",
 172         [TK_A_GROUP_ID] =               "A GROUP_ID",
 173         [TK_A_MODE_ID] =                "A MODE_ID",
 174         [TK_A_ENV] =                    "A ENV",
 175         [TK_A_NAME] =                   "A NAME",
 176         [TK_A_DEVLINK] =                "A DEVLINK",
 177         [TK_A_EVENT_TIMEOUT] =          "A EVENT_TIMEOUT",
 178         [TK_A_IGNORE_REMOVE] =          "A IGNORE_REMOVE",
 179         [TK_A_ATTR] =                   "A ATTR",
 180         [TK_A_RUN] =                    "A RUN",
 181         [TK_A_GOTO] =                   "A GOTO",
 182         [TK_A_LAST_RULE] =              "A LAST_RULE",
 183
 184         [TK_END] =                      "END",
 185 };
 186
 187 struct token {
 188         enum token_type type;
 189         union {
 190                 struct {
 191                         unsigned int next_rule;
 192                         unsigned int label_off;
 193                         unsigned int filename_off;
 194                 } rule;
 195                 struct {
 196                         unsigned short op;
 197                         unsigned short glob;
 198                         unsigned int value_off;
 199                         union {
 200                                 unsigned int attr_off;
 201                                 int ignore_error;
 202                                 int i;
 203                                 unsigned int rule_goto;
 204                                 mode_t  mode;
 205                                 uid_t uid;
 206                                 gid_t gid;
 207                                 int num_fake_part;
 208                                 int devlink_prio;
 209                                 int event_timeout;
 210                         };
 211                 } key;
 212         };
 213 };
 214
 215 #define MAX_TK          64
 216 struct rule_tmp {
 217         struct udev_rules *rules;
 218         struct token rule;
 219         struct token token[MAX_TK];
 220         unsigned int token_cur;
 221 };
 222
 223 struct uid_gid {
 224         unsigned int name_off;
 225         union {
 226                 uid_t   uid;
 227                 gid_t   gid;
 228         };
 229 };
 230
 231 struct udev_rules {
 232         struct udev *udev;
 233         int resolve_names;
 234
 235         /* every key in the rules file becomes a token */
 236         struct token *tokens;
 237         unsigned int token_cur;
 238         unsigned int token_max;
 239
 240         /* all key strings are copied to a single string buffer */
 241         char *buf;
 242         size_t buf_cur;
 243         size_t buf_max;
 244         unsigned int buf_count;
 245
 246         /* during rule parsing, we cache uid/gid lookup results */
 247         struct uid_gid *uids;
 248         unsigned int uids_cur;
 249         unsigned int uids_max;
 250         struct uid_gid *gids;
 251         unsigned int gids_cur;
 252         unsigned int gids_max;
 253 };
 254
 255 /* NOTE: we could lookup and return existing strings, or tails of strings */
 256 static int add_string(struct udev_rules *rules, const char *str)
 257 {
 258         size_t len = strlen(str)+1;
 259         int off;
 260
 261         /* offset 0 is always '\0' */
 262         if (str[0] == '\0')
 263                 return 0;
 264
 265         /* grow buffer if needed */
 266         if (rules->buf_cur + len+1 >= rules->buf_max) {
 267                 char *buf;
 268                 unsigned int add;
 269
 270                 /* double the buffer size */
 271                 add = rules->buf_max;
 272                 if (add < len * 8)
 273                         add = len * 8;
 274
 275                 buf = realloc(rules->buf, rules->buf_max + add);
 276                 if (buf == NULL)
 277                         return -1;
 278                 info(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
 279                 rules->buf = buf;
 280                 rules->buf_max += add;
 281         }
 282         off = rules->buf_cur;
 283         memcpy(&rules->buf[rules->buf_cur], str, len);
 284         rules->buf_cur += len;
 285         rules->buf_count++;
 286         return off;
 287 }
 288
 289 static int add_token(struct udev_rules *rules, struct token *token)
 290 {
 291
 292         /* grow buffer if needed */
 293         if (rules->token_cur+1 >= rules->token_max) {
 294                 struct token *tokens;
 295                 unsigned int add;
 296
 297                 /* double the buffer size */
 298                 add = rules->token_max;
 299                 if (add < 8)
 300                         add = 8;
 301
 302                 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
 303                 if (tokens == NULL)
 304                         return -1;
 305                 info(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
 306                 rules->tokens = tokens;
 307                 rules->token_max += add;
 308         }
 309         memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
 310         rules->token_cur++;
 311         return 0;
 312 }
 313
 314 static uid_t add_uid(struct udev_rules *rules, const char *owner)
 315 {
 316         unsigned int i;
 317         uid_t uid;
 318         unsigned int off;
 319
 320         /* lookup, if we know it already */
 321         for (i = 0; i < rules->uids_cur; i++) {
 322                 off = rules->uids[i].name_off;
 323                 if (strcmp(&rules->buf[off], owner) == 0) {
 324                         uid = rules->uids[i].uid;
 325                         dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
 326                         return uid;
 327                 }
 328         }
 329         uid = util_lookup_user(rules->udev, owner);
 330
 331         /* grow buffer if needed */
 332         if (rules->uids_cur+1 >= rules->uids_max) {
 333                 struct uid_gid *uids;
 334                 unsigned int add;
 335
 336                 /* double the buffer size */
 337                 add = rules->uids_max;
 338                 if (add < 1)
 339                         add = 8;
 340
 341                 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
 342                 if (uids == NULL)
 343                         return uid;
 344                 info(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
 345                 rules->uids = uids;
 346                 rules->uids_max += add;
 347         }
 348         rules->uids[rules->uids_cur].uid = uid;
 349         off = add_string(rules, owner);
 350         if (off <= 0)
 351                 return uid;
 352         rules->uids[rules->uids_cur].name_off = off;
 353         rules->uids_cur++;
 354         return uid;
 355 }
 356
 357 static gid_t add_gid(struct udev_rules *rules, const char *group)
 358 {
 359         unsigned int i;
 360         gid_t gid;
 361         unsigned int off;
 362
 363         /* lookup, if we know it already */
 364         for (i = 0; i < rules->gids_cur; i++) {
 365                 off = rules->gids[i].name_off;
 366                 if (strcmp(&rules->buf[off], group) == 0) {
 367                         gid = rules->gids[i].gid;
 368                         dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
 369                         return gid;
 370                 }
 371         }
 372         gid = util_lookup_group(rules->udev, group);
 373
 374         /* grow buffer if needed */
 375         if (rules->gids_cur+1 >= rules->gids_max) {
 376                 struct uid_gid *gids;
 377                 unsigned int add;
 378
 379                 /* double the buffer size */
 380                 add = rules->gids_max;
 381                 if (add < 1)
 382                         add = 8;
 383
 384                 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
 385                 if (gids == NULL)
 386                         return gid;
 387                 info(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
 388                 rules->gids = gids;
 389                 rules->gids_max += add;
 390         }
 391         rules->gids[rules->gids_cur].gid = gid;
 392         off = add_string(rules, group);
 393         if (off <= 0)
 394                 return gid;
 395         rules->gids[rules->gids_cur].name_off = off;
 396         rules->gids_cur++;
 397         return gid;
 398 }
 399
 400 static int import_property_from_string(struct udev_device *dev, char *line)
 401 {
 402         struct udev *udev = udev_device_get_udev(dev);
 403         char *key;
 404         char *val;
 405         size_t len;
 406
 407         /* find key */
 408         key = line;
 409         while (isspace(key[0]))
 410                 key++;
 411
 412         /* comment or empty line */
 413         if (key[0] == '#' || key[0] == '\0')
 414                 return -1;
 415
 416         /* split key/value */
 417         val = strchr(key, '=');
 418         if (val == NULL)
 419                 return -1;
 420         val[0] = '\0';
 421         val++;
 422
 423         /* find value */
 424         while (isspace(val[0]))
 425                 val++;
 426
 427         /* terminate key */
 428         len = strlen(key);
 429         if (len == 0)
 430                 return -1;
 431         while (isspace(key[len-1]))
 432                 len--;
 433         key[len] = '\0';
 434
 435         /* terminate value */
 436         len = strlen(val);
 437         if (len == 0)
 438                 return -1;
 439         while (isspace(val[len-1]))
 440                 len--;
 441         val[len] = '\0';
 442
 443         if (len == 0)
 444                 return -1;
 445
 446         /* unquote */
 447         if (val[0] == '"' || val[0] == '\'') {
 448                 if (val[len-1] != val[0]) {
 449                         info(udev, "inconsistent quoting: '%s', skip\n", line);
 450                         return -1;
 451                 }
 452                 val[len-1] = '\0';
 453                 val++;
 454         }
 455
 456         info(udev, "adding '%s'='%s'\n", key, val);
 457
 458         /* handle device, renamed by external tool, returning new path */
 459         if (strcmp(key, "DEVPATH") == 0) {
 460                 char syspath[UTIL_PATH_SIZE];
 461
 462                 info(udev, "updating devpath from '%s' to '%s'\n",
 463                      udev_device_get_devpath(dev), val);
 464                 util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
 465                 util_strlcat(syspath, val, sizeof(syspath));
 466                 udev_device_set_syspath(dev, syspath);
 467         } else {
 468                 struct udev_list_entry *entry;
 469
 470                 entry = udev_device_add_property(dev, key, val);
 471                 /* store in db */
 472                 udev_list_entry_set_flag(entry, 1);
 473         }
 474         return 0;
 475 }
 476
 477 static int import_file_into_properties(struct udev_device *dev, const char *filename)
 478 {
 479         FILE *f;
 480         char line[UTIL_LINE_SIZE];
 481
 482         f = fopen(filename, "r");
 483         if (f == NULL)
 484                 return -1;
 485         while (fgets(line, sizeof(line), f) != NULL)
 486                 import_property_from_string(dev, line);
 487         fclose(f);
 488         return 0;
 489 }
 490
 491 static int import_program_into_properties(struct udev_device *dev, const char *program)
 492 {
 493         struct udev *udev = udev_device_get_udev(dev);
 494         char **envp;
 495         char result[2048];
 496         size_t reslen;
 497         char *line;
 498
 499         envp = udev_device_get_properties_envp(dev);
 500         if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
 501                 return -1;
 502
 503         line = result;
 504         while (line != NULL) {
 505                 char *pos;
 506
 507                 pos = strchr(line, '\n');
 508                 if (pos != NULL) {
 509                         pos[0] = '\0';
 510                         pos = &pos[1];
 511                 }
 512                 import_property_from_string(dev, line);
 513                 line = pos;
 514         }
 515         return 0;
 516 }
 517
 518 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
 519 {
 520         struct udev *udev = udev_device_get_udev(dev);
 521         struct udev_device *dev_parent;
 522         struct udev_list_entry *list_entry;
 523
 524         dev_parent = udev_device_get_parent(dev);
 525         if (dev_parent == NULL)
 526                 return -1;
 527
 528         dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
 529         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
 530                 const char *key = udev_list_entry_get_name(list_entry);
 531                 const char *val = udev_list_entry_get_value(list_entry);
 532
 533                 if (fnmatch(filter, key, 0) == 0) {
 534                         struct udev_list_entry *entry;
 535
 536                         dbg(udev, "import key '%s=%s'\n", key, val);
 537                         entry = udev_device_add_property(dev, key, val);
 538                         /* store in db */
 539                         udev_list_entry_set_flag(entry, 1);
 540                 }
 541         }
 542         return 0;
 543 }
 544
 545 #define WAIT_LOOP_PER_SECOND            50
 546 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
 547 {
 548         struct udev *udev = udev_device_get_udev(dev);
 549         char filepath[UTIL_PATH_SIZE];
 550         char devicepath[UTIL_PATH_SIZE];
 551         struct stat stats;
 552         int loop = timeout * WAIT_LOOP_PER_SECOND;
 553
 554         /* a relative path is a device attribute */
 555         devicepath[0] = '\0';
 556         if (file[0] != '/') {
 557                 util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath));
 558                 util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath));
 559
 560                 util_strlcpy(filepath, devicepath, sizeof(filepath));
 561                 util_strlcat(filepath, "/", sizeof(filepath));
 562                 util_strlcat(filepath, file, sizeof(filepath));
 563                 file = filepath;
 564         }
 565
 566         dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
 567         while (--loop) {
 568                 /* lookup file */
 569                 if (stat(file, &stats) == 0) {
 570                         info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
 571                         return 0;
 572                 }
 573                 /* make sure, the device did not disappear in the meantime */
 574                 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
 575                         info(udev, "device disappeared while waiting for '%s'\n", file);
 576                         return -2;
 577                 }
 578                 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
 579                 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
 580         }
 581         info(udev, "waiting for '%s' failed\n", file);
 582         return -1;
 583 }
 584
 585 static int attr_subst_subdir(char *attr, size_t len)
 586 {
 587         char *pos;
 588         int found = 0;
 589
 590         pos = strstr(attr, "/*/");
 591         if (pos != NULL) {
 592                 char str[UTIL_PATH_SIZE];
 593                 DIR *dir;
 594
 595                 pos[1] = '\0';
 596                 util_strlcpy(str, &pos[2], sizeof(str));
 597                 dir = opendir(attr);
 598                 if (dir != NULL) {
 599                         struct dirent *dent;
 600
 601                         for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 602                                 struct stat stats;
 603
 604                                 if (dent->d_name[0] == '.')
 605                                         continue;
 606                                 util_strlcat(attr, dent->d_name, len);
 607                                 util_strlcat(attr, str, len);
 608                                 if (stat(attr, &stats) == 0) {
 609                                         found = 1;
 610                                         break;
 611                                 }
 612                                 pos[1] = '\0';
 613                         }
 614                         closedir(dir);
 615                 }
 616                 if (!found)
 617                         util_strlcat(attr, str, len);
 618         }
 619
 620         return found;
 621 }
 622
 623 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
 624 {
 625         char *linepos;
 626         char *temp;
 627
 628         linepos = *line;
 629         if (linepos == NULL && linepos[0] == '\0')
 630                 return -1;
 631
 632         /* skip whitespace */
 633         while (isspace(linepos[0]) || linepos[0] == ',')
 634                 linepos++;
 635
 636         /* get the key */
 637         if (linepos[0] == '\0')
 638                 return -1;
 639         *key = linepos;
 640
 641         while (1) {
 642                 linepos++;
 643                 if (linepos[0] == '\0')
 644                         return -1;
 645                 if (isspace(linepos[0]))
 646                         break;
 647                 if (linepos[0] == '=')
 648                         break;
 649                 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
 650                         if (linepos[1] == '=')
 651                                 break;
 652         }
 653
 654         /* remember end of key */
 655         temp = linepos;
 656
 657         /* skip whitespace after key */
 658         while (isspace(linepos[0]))
 659                 linepos++;
 660         if (linepos[0] == '\0')
 661                 return -1;
 662
 663         /* get operation type */
 664         if (linepos[0] == '=' && linepos[1] == '=') {
 665                 *op = OP_MATCH;
 666                 linepos += 2;
 667         } else if (linepos[0] == '!' && linepos[1] == '=') {
 668                 *op = OP_NOMATCH;
 669                 linepos += 2;
 670         } else if (linepos[0] == '+' && linepos[1] == '=') {
 671                 *op = OP_ADD;
 672                 linepos += 2;
 673         } else if (linepos[0] == '=') {
 674                 *op = OP_ASSIGN;
 675                 linepos++;
 676         } else if (linepos[0] == ':' && linepos[1] == '=') {
 677                 *op = OP_ASSIGN_FINAL;
 678                 linepos += 2;
 679         } else
 680                 return -1;
 681
 682         /* terminate key */
 683         temp[0] = '\0';
 684
 685         /* skip whitespace after operator */
 686         while (isspace(linepos[0]))
 687                 linepos++;
 688         if (linepos[0] == '\0')
 689                 return -1;
 690
 691         /* get the value */
 692         if (linepos[0] == '"')
 693                 linepos++;
 694         else
 695                 return -1;
 696         *value = linepos;
 697
 698         /* terminate */
 699         temp = strchr(linepos, '"');
 700         if (!temp)
 701                 return -1;
 702         temp[0] = '\0';
 703         temp++;
 704         dbg(udev, "%s '%s'-'%s'\n", operation_str[*op], *key, *value);
 705
 706         /* move line to next key */
 707         *line = temp;
 708         return 0;
 709 }
 710
 711 /* extract possible KEY{attr} */
 712 static char *get_key_attribute(struct udev *udev, char *str)
 713 {
 714         char *pos;
 715         char *attr;
 716
 717         attr = strchr(str, '{');
 718         if (attr != NULL) {
 719                 attr++;
 720                 pos = strchr(attr, '}');
 721                 if (pos == NULL) {
 722                         err(udev, "missing closing brace for format\n");
 723                         return NULL;
 724                 }
 725                 pos[0] = '\0';
 726                 dbg(udev, "attribute='%s'\n", attr);
 727                 return attr;
 728         }
 729         return NULL;
 730 }
 731
 732 static int rule_add_token(struct rule_tmp *rule_tmp, enum token_type type,
 733                           enum operation_type op,
 734                           const char *value, const void *data)
 735 {
 736         struct token *token = &rule_tmp->token[rule_tmp->token_cur];
 737         const char *attr = data;
 738         enum string_glob_type glob;
 739
 740         memset(token, 0x00, sizeof(struct token));
 741
 742         switch (type) {
 743         case TK_M_ACTION:
 744         case TK_M_DEVPATH:
 745         case TK_M_KERNEL:
 746         case TK_M_SUBSYSTEM:
 747         case TK_M_DRIVER:
 748         case TK_M_WAITFOR:
 749         case TK_M_DEVLINK:
 750         case TK_M_NAME:
 751         case TK_M_KERNELS:
 752         case TK_M_SUBSYSTEMS:
 753         case TK_M_DRIVERS:
 754         case TK_M_PROGRAM:
 755         case TK_M_IMPORT_FILE:
 756         case TK_M_IMPORT_PROG:
 757         case TK_M_IMPORT_PARENT:
 758         case TK_M_RESULT:
 759         case TK_A_OWNER:
 760         case TK_A_GROUP:
 761         case TK_A_MODE:
 762         case TK_A_NAME:
 763         case TK_A_DEVLINK:
 764         case TK_A_GOTO:
 765                 token->key.value_off = add_string(rule_tmp->rules, value);
 766                 break;
 767         case TK_M_ENV:
 768         case TK_M_ATTR:
 769         case TK_M_ATTRS:
 770         case TK_A_ATTR:
 771         case TK_A_ENV:
 772                 token->key.value_off = add_string(rule_tmp->rules, value);
 773                 token->key.attr_off = add_string(rule_tmp->rules, attr);
 774                 break;
 775         case TK_M_TEST:
 776                 token->key.value_off = add_string(rule_tmp->rules, value);
 777                 if (data != NULL)
 778                         token->key.mode = *(mode_t *)data;
 779                 break;
 780         case TK_A_IGNORE_DEVICE:
 781         case TK_A_STRING_ESCAPE_NONE:
 782         case TK_A_STRING_ESCAPE_REPLACE:
 783         case TK_A_IGNORE_REMOVE:
 784         case TK_A_LAST_RULE:
 785                 break;
 786         case TK_A_RUN:
 787                 token->key.value_off = add_string(rule_tmp->rules, value);
 788                 token->key.ignore_error = *(int *)data;
 789                 break;
 790         case TK_A_NUM_FAKE_PART:
 791                 token->key.num_fake_part = *(int *)data;
 792                 break;
 793         case TK_A_DEVLINK_PRIO:
 794                 token->key.devlink_prio = *(int *)data;
 795                 break;
 796         case TK_A_OWNER_ID:
 797                 token->key.uid = *(uid_t *)data;
 798                 break;
 799         case TK_A_GROUP_ID:
 800                 token->key.gid = *(gid_t *)data;
 801                 break;
 802         case TK_A_MODE_ID:
 803                 token->key.mode = *(mode_t *)data;
 804                 break;
 805         case TK_A_EVENT_TIMEOUT:
 806                 token->key.event_timeout = *(int *)data;
 807                 break;
 808         case TK_RULE:
 809         case TK_M_PARENTS_MAX:
 810         case TK_M_MAX:
 811         case TK_END:
 812         case TK_UNSET:
 813                 err(rule_tmp->rules->udev, "wrong type %u\n", type);
 814                 return -1;
 815         }
 816
 817         glob = GL_PLAIN;
 818         if (value != NULL) {
 819                 if (type < TK_M_MAX) {
 820                         /* check if we need to split or call fnmatch() while matching rules */
 821                         int has_split;
 822                         int has_glob;
 823
 824                         has_split = (strchr(value, '|') != NULL);
 825                         has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||
 826                                     strchr(value, '[') != NULL || strchr(value, ']') != NULL);
 827                         if (has_split && has_glob) {
 828                                 glob = GL_SPLIT_GLOB;
 829                         } else if (has_split) {
 830                                 glob = GL_SPLIT;
 831                         } else if (has_glob) {
 832                                 if (strcmp(value, "?*") == 0)
 833                                         glob = GL_SOMETHING;
 834                                 else
 835                                         glob = GL_GLOB;
 836                         }
 837                 } else {
 838                         /* check if we need to substitute format strings for matching rules */
 839                         if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
 840                                 glob = GL_FORMAT;
 841                 }
 842         }
 843
 844         token->type = type;
 845         token->key.op = op;
 846         token->key.glob = glob;
 847         rule_tmp->token_cur++;
 848         if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
 849                 err(rule_tmp->rules->udev, "temporary rule array too small\n");
 850                 return -1;
 851         }
 852         return 0;
 853 }
 854
 855 #ifdef DEBUG
 856 static void dump_token(struct udev_rules *rules, struct token *token)
 857 {
 858         enum token_type type = token->type;
 859         enum operation_type op = token->key.op;
 860         enum string_glob_type glob = token->key.glob;
 861         const char *value = &rules->buf[token->key.value_off];
 862         const char *attr = &rules->buf[token->key.attr_off];
 863
 864         switch (type) {
 865         case TK_RULE:
 866                 {
 867                         const char *tks_ptr = (char *)rules->tokens;
 868                         const char *tk_ptr = (char *)token;
 869                         unsigned int off = tk_ptr - tks_ptr;
 870
 871                         dbg(rules->udev, "* RULE '%s', off: %u(%u), next: %u, label: '%s'\n",
 872                             &rules->buf[token->rule.filename_off],
 873                             off / (unsigned int) sizeof(struct token), off,
 874                             token->rule.next_rule,
 875                             &rules->buf[token->rule.label_off]);
 876                         break;
 877                 }
 878         case TK_M_ACTION:
 879         case TK_M_DEVPATH:
 880         case TK_M_KERNEL:
 881         case TK_M_SUBSYSTEM:
 882         case TK_M_DRIVER:
 883         case TK_M_WAITFOR:
 884         case TK_M_DEVLINK:
 885         case TK_M_NAME:
 886         case TK_M_KERNELS:
 887         case TK_M_SUBSYSTEMS:
 888         case TK_M_DRIVERS:
 889         case TK_M_PROGRAM:
 890         case TK_M_IMPORT_FILE:
 891         case TK_M_IMPORT_PROG:
 892         case TK_M_IMPORT_PARENT:
 893         case TK_M_RESULT:
 894         case TK_A_NAME:
 895         case TK_A_DEVLINK:
 896         case TK_A_OWNER:
 897         case TK_A_GROUP:
 898         case TK_A_MODE:
 899         case TK_A_RUN:
 900                 dbg(rules->udev, "%s %s '%s'(%s)\n",
 901                     token_str[type], operation_str[op], value, string_glob_str[glob]);
 902                 break;
 903         case TK_M_ATTR:
 904         case TK_M_ATTRS:
 905         case TK_M_ENV:
 906         case TK_A_ATTR:
 907         case TK_A_ENV:
 908                 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
 909                     token_str[type], operation_str[op], attr, value, string_glob_str[glob]);
 910                 break;
 911         case TK_A_IGNORE_DEVICE:
 912         case TK_A_STRING_ESCAPE_NONE:
 913         case TK_A_STRING_ESCAPE_REPLACE:
 914         case TK_A_LAST_RULE:
 915         case TK_A_IGNORE_REMOVE:
 916                 dbg(rules->udev, "%s\n", token_str[type]);
 917                 break;
 918         case TK_M_TEST:
 919                 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
 920                     token_str[type], operation_str[op], value, string_glob_str[glob], token->key.mode);
 921                 break;
 922         case TK_A_NUM_FAKE_PART:
 923                 dbg(rules->udev, "%s %u\n", token_str[type], token->key.num_fake_part);
 924                 break;
 925         case TK_A_DEVLINK_PRIO:
 926                 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.devlink_prio);
 927                 break;
 928         case TK_A_OWNER_ID:
 929                 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.uid);
 930                 break;
 931         case TK_A_GROUP_ID:
 932                 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.gid);
 933                 break;
 934         case TK_A_MODE_ID:
 935                 dbg(rules->udev, "%s %s %#o\n", token_str[type], operation_str[op], token->key.mode);
 936                 break;
 937         case TK_A_EVENT_TIMEOUT:
 938                 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.event_timeout);
 939                 break;
 940         case TK_A_GOTO:
 941                 dbg(rules->udev, "%s '%s' %u\n", token_str[type], value, token->key.rule_goto);
 942                 break;
 943         case TK_END:
 944                 dbg(rules->udev, "* %s\n", token_str[type]);
 945                 break;
 946         case TK_M_PARENTS_MAX:
 947         case TK_M_MAX:
 948         case TK_UNSET:
 949                 dbg(rules->udev, "unknown type %u\n", type);
 950                 break;
 951         }
 952 }
 953
 954 static void dump_rules(struct udev_rules *rules)
 955 {
 956         unsigned int i;
 957
 958         dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
 959             rules->token_cur,
 960             rules->token_cur * sizeof(struct token),
 961             rules->buf_count,
 962             rules->buf_cur);
 963         for(i = 0; i < rules->token_cur; i++)
 964                 dump_token(rules, &rules->tokens[i]);
 965 }
 966 #else
 967 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
 968 static inline void dump_rules(struct udev_rules *rules) {}
 969 #endif /* DEBUG */
 970
 971 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
 972 {
 973         unsigned int i;
 974         unsigned int start = 0;
 975         unsigned int end = rule_tmp->token_cur;
 976
 977         for (i = 0; i < rule_tmp->token_cur; i++) {
 978                 enum token_type next_val = TK_UNSET;
 979                 unsigned int next_idx;
 980                 unsigned int j;
 981
 982                 /* find smallest value */
 983                 for (j = start; j < end; j++) {
 984                         if (rule_tmp->token[j].type == TK_UNSET)
 985                                 continue;
 986                         if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
 987                                 next_val = rule_tmp->token[j].type;
 988                                 next_idx = j;
 989                         }
 990                 }
 991
 992                 /* add token and mark done */
 993                 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
 994                         return -1;
 995                 rule_tmp->token[next_idx].type = TK_UNSET;
 996
 997                 /* shrink range */
 998                 if (next_idx == start)
 999                         start++;
1000                 if (next_idx+1 == end)
1001                         end--;
1002         }
1003         return 0;
1004 }
1005
1006 static int add_rule(struct udev_rules *rules, char *line,
1007                     const char *filename, unsigned int filename_off, unsigned int lineno)
1008 {
1009         int valid = 0;
1010         char *linepos;
1011         char *attr;
1012         int physdev = 0;
1013         struct rule_tmp rule_tmp;
1014
1015         memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1016         rule_tmp.rules = rules;
1017         rule_tmp.rule.type = TK_RULE;
1018         rule_tmp.rule.rule.filename_off = filename_off;
1019
1020         linepos = line;
1021         while (1) {
1022                 char *key;
1023                 char *value;
1024                 enum operation_type op;
1025
1026                 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1027                         break;
1028
1029                 if (strcasecmp(key, "ACTION") == 0) {
1030                         if (op > OP_MATCH_MAX) {
1031                                 err(rules->udev, "invalid ACTION operation\n");
1032                                 goto invalid;
1033                         }
1034                         rule_add_token(&rule_tmp, TK_M_ACTION, op, value, NULL);
1035                         valid = 1;
1036                         continue;
1037                 }
1038
1039                 if (strcasecmp(key, "DEVPATH") == 0) {
1040                         if (op > OP_MATCH_MAX) {
1041                                 err(rules->udev, "invalid DEVPATH operation\n");
1042                                 goto invalid;
1043                         }
1044                         rule_add_token(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1045                         valid = 1;
1046                         continue;
1047                 }
1048
1049                 if (strcasecmp(key, "KERNEL") == 0) {
1050                         if (op > OP_MATCH_MAX) {
1051                                 err(rules->udev, "invalid KERNEL operation\n");
1052                                 goto invalid;
1053                         }
1054                         rule_add_token(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1055                         valid = 1;
1056                         continue;
1057                 }
1058
1059                 if (strcasecmp(key, "SUBSYSTEM") == 0) {
1060                         if (op > OP_MATCH_MAX) {
1061                                 err(rules->udev, "invalid SUBSYSTEM operation\n");
1062                                 goto invalid;
1063                         }
1064                         /* bus, class, subsystem events should all be the same */
1065                         if (strcmp(value, "subsystem") == 0 ||
1066                             strcmp(value, "bus") == 0 ||
1067                             strcmp(value, "class") == 0) {
1068                                 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1069                                         err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1070                                             "please fix it in %s:%u", value, filename, lineno);
1071                                 rule_add_token(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1072                         } else
1073                                 rule_add_token(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1074                         valid = 1;
1075                         continue;
1076                 }
1077
1078                 if (strcasecmp(key, "DRIVER") == 0) {
1079                         if (op > OP_MATCH_MAX) {
1080                                 err(rules->udev, "invalid DRIVER operation\n");
1081                                 goto invalid;
1082                         }
1083                         rule_add_token(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1084                         valid = 1;
1085                         continue;
1086                 }
1087
1088                 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1089                         attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1090                         if (attr == NULL) {
1091                                 err(rules->udev, "error parsing ATTR attribute\n");
1092                                 goto invalid;
1093                         }
1094                         if (op < OP_MATCH_MAX) {
1095                                 rule_add_token(&rule_tmp, TK_M_ATTR, op, value, attr);
1096                         } else {
1097                                 rule_add_token(&rule_tmp, TK_A_ATTR, op, value, attr);
1098                         }
1099                         valid = 1;
1100                         continue;
1101                 }
1102
1103                 if (strcasecmp(key, "KERNELS") == 0 ||
1104                     strcasecmp(key, "ID") == 0) {
1105                         if (op > OP_MATCH_MAX) {
1106                                 err(rules->udev, "invalid KERNELS operation\n");
1107                                 goto invalid;
1108                         }
1109                         rule_add_token(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1110                         valid = 1;
1111                         continue;
1112                 }
1113
1114                 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
1115                     strcasecmp(key, "BUS") == 0) {
1116                         if (op > OP_MATCH_MAX) {
1117                                 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1118                                 goto invalid;
1119                         }
1120                         rule_add_token(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1121                         valid = 1;
1122                         continue;
1123                 }
1124
1125                 if (strcasecmp(key, "DRIVERS") == 0) {
1126                         if (op > OP_MATCH_MAX) {
1127                                 err(rules->udev, "invalid DRIVERS operation\n");
1128                                 goto invalid;
1129                         }
1130                         rule_add_token(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1131                         valid = 1;
1132                         continue;
1133                 }
1134
1135                 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1136                     strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1137                         if (op > OP_MATCH_MAX) {
1138                                 err(rules->udev, "invalid ATTRS operation\n");
1139                                 goto invalid;
1140                         }
1141                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1142                         if (attr == NULL) {
1143                                 err(rules->udev, "error parsing ATTRS attribute\n");
1144                                 goto invalid;
1145                         }
1146                         if (strncmp(attr, "device/", 7) == 0)
1147                                 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1148                                     "please fix it in %s:%u", filename, lineno);
1149                         else if (strstr(attr, "../") != NULL)
1150                                 err(rules->udev, "do not reference parent sysfs directories directly, "
1151                                     "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1152                         rule_add_token(&rule_tmp, TK_M_ATTRS, op, value, attr);
1153                         valid = 1;
1154                         continue;
1155                 }
1156
1157                 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1158                         attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1159                         if (attr == NULL) {
1160                                 err(rules->udev, "error parsing ENV attribute\n");
1161                                 goto invalid;
1162                         }
1163                         if (strncmp(attr, "PHYSDEV", 7) == 0)
1164                                 physdev = 1;
1165                         if (op < OP_MATCH_MAX) {
1166                                 if (rule_add_token(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1167                                         goto invalid;
1168                         } else {
1169                                 if (rule_add_token(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1170                                         goto invalid;
1171                         }
1172                         valid = 1;
1173                         continue;
1174                 }
1175
1176                 if (strcasecmp(key, "PROGRAM") == 0) {
1177                         rule_add_token(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1178                         valid = 1;
1179                         continue;
1180                 }
1181
1182                 if (strcasecmp(key, "RESULT") == 0) {
1183                         if (op > OP_MATCH_MAX) {
1184                                 err(rules->udev, "invalid RESULT operation\n");
1185                                 goto invalid;
1186                         }
1187                         rule_add_token(&rule_tmp, TK_M_RESULT, op, value, NULL);
1188                         valid = 1;
1189                         continue;
1190                 }
1191
1192                 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1193                         attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1194                         if (attr != NULL && strstr(attr, "program")) {
1195                                 dbg(rules->udev, "IMPORT will be executed\n");
1196                                 rule_add_token(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1197                                 valid = 1;
1198                         } else if (attr != NULL && strstr(attr, "file")) {
1199                                 dbg(rules->udev, "IMPORT will be included as file\n");
1200                                 rule_add_token(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1201                                 valid = 1;
1202                         } else if (attr != NULL && strstr(attr, "parent")) {
1203                                 dbg(rules->udev, "IMPORT will include the parent values\n");
1204                                 rule_add_token(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1205                                 valid = 1;
1206                         } else {
1207                                 /* figure it out if it is executable */
1208                                 char file[UTIL_PATH_SIZE];
1209                                 char *pos;
1210                                 struct stat statbuf;
1211
1212                                 util_strlcpy(file, value, sizeof(file));
1213                                 pos = strchr(file, ' ');
1214                                 if (pos)
1215                                         pos[0] = '\0';
1216
1217                                 /* allow programs in /lib/udev called without the path */
1218                                 if (strchr(file, '/') == NULL) {
1219                                         util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));
1220                                         util_strlcat(file, value, sizeof(file));
1221                                         pos = strchr(file, ' ');
1222                                         if (pos)
1223                                                 pos[0] = '\0';
1224                                 }
1225
1226                                 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1227                                 if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
1228                                         dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1229                                         rule_add_token(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1230                                         valid = 1;
1231                                 } else {
1232                                         dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1233                                         rule_add_token(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1234                                         valid = 1;
1235                                 }
1236                         }
1237                         continue;
1238                 }
1239
1240                 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1241                         mode_t mode = 0;
1242
1243                         if (op > OP_MATCH_MAX) {
1244                                 err(rules->udev, "invalid TEST operation\n");
1245                                 goto invalid;
1246                         }
1247                         attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1248                         if (attr != NULL) {
1249                                 mode = strtol(attr, NULL, 8);
1250                                 rule_add_token(&rule_tmp, TK_M_TEST, op, value, &mode);
1251                         } else {
1252                                 rule_add_token(&rule_tmp, TK_M_TEST, op, value, NULL);
1253                         }
1254                         valid = 1;
1255                         continue;
1256                 }
1257
1258                 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1259                         int flag = 0;
1260
1261                         attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1262                         if (attr != NULL && strstr(attr, "ignore_error"))
1263                                 flag = 1;
1264                         rule_add_token(&rule_tmp, TK_A_RUN, op, value, &flag);
1265                         valid = 1;
1266                         continue;
1267                 }
1268
1269                 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1270                         rule_add_token(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1271                         valid = 1;
1272                         continue;
1273                 }
1274
1275                 if (strcasecmp(key, "LABEL") == 0) {
1276                         rule_tmp.rule.rule.label_off = add_string(rules, value);
1277                         valid = 1;
1278                         continue;
1279                 }
1280
1281                 if (strcasecmp(key, "GOTO") == 0) {
1282                         rule_add_token(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1283                         valid = 1;
1284                         continue;
1285                 }
1286
1287                 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1288                         if (op < OP_MATCH_MAX) {
1289                                 rule_add_token(&rule_tmp, TK_M_NAME, op, value, NULL);
1290                         } else {
1291                                 if (value[0] == '\0')
1292                                         dbg(rules->udev, "name empty, node creation suppressed\n");
1293                                 rule_add_token(&rule_tmp, TK_A_NAME, op, value, NULL);
1294                                 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1295                                 if (attr != NULL) {
1296                                         if (strstr(attr, "all_partitions") != NULL) {
1297                                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1298
1299                                                 dbg(rules->udev, "creation of partition nodes requested\n");
1300                                                 rule_add_token(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1301                                         }
1302                                         if (strstr(attr, "ignore_remove") != NULL) {
1303                                                 dbg(rules->udev, "remove event should be ignored\n");
1304                                                 rule_add_token(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1305                                         }
1306                                 }
1307                         }
1308                         continue;
1309                 }
1310
1311                 if (strcasecmp(key, "SYMLINK") == 0) {
1312                         if (op < OP_MATCH_MAX)
1313                                 rule_add_token(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1314                         else
1315                                 rule_add_token(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1316                         valid = 1;
1317                         continue;
1318                 }
1319
1320                 if (strcasecmp(key, "OWNER") == 0) {
1321                         uid_t uid;
1322                         char *endptr;
1323
1324                         uid = strtoul(value, &endptr, 10);
1325                         if (endptr[0] == '\0') {
1326                                 rule_add_token(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1327                         } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1328                                 uid = add_uid(rules, value);
1329                                 rule_add_token(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1330                         } else {
1331                                 rule_add_token(&rule_tmp, TK_A_OWNER, op, value, NULL);
1332                         }
1333                         valid = 1;
1334                         continue;
1335                 }
1336
1337                 if (strcasecmp(key, "GROUP") == 0) {
1338                         gid_t gid;
1339                         char *endptr;
1340
1341                         gid = strtoul(value, &endptr, 10);
1342                         if (endptr[0] == '\0') {
1343                                 rule_add_token(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1344                         } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1345                                 gid = add_gid(rules, value);
1346                                 rule_add_token(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1347                         } else {
1348                                 rule_add_token(&rule_tmp, TK_A_GROUP, op, value, NULL);
1349                         }
1350                         valid = 1;
1351                         continue;
1352                 }
1353
1354                 if (strcasecmp(key, "MODE") == 0) {
1355                         mode_t mode;
1356                         char *endptr;
1357
1358                         mode = strtol(value, &endptr, 8);
1359                         if (endptr[0] == '\0')
1360                                 rule_add_token(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1361                         else
1362                                 rule_add_token(&rule_tmp, TK_A_MODE, op, value, NULL);
1363                         valid = 1;
1364                         continue;
1365                 }
1366
1367                 if (strcasecmp(key, "OPTIONS") == 0) {
1368                         const char *pos;
1369
1370                         if (strstr(value, "last_rule") != NULL) {
1371                                 dbg(rules->udev, "last rule to be applied\n");
1372                                 rule_add_token(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1373                         }
1374                         if (strstr(value, "ignore_device") != NULL) {
1375                                 dbg(rules->udev, "device should be ignored\n");
1376                                 rule_add_token(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1377                         }
1378                         if (strstr(value, "ignore_remove") != NULL) {
1379                                 dbg(rules->udev, "remove event should be ignored\n");
1380                                 rule_add_token(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1381                         }
1382                         pos = strstr(value, "link_priority=");
1383                         if (pos != NULL) {
1384                                 int prio = atoi(&pos[strlen("link_priority=")]);
1385
1386                                 rule_add_token(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1387                                 dbg(rules->udev, "link priority=%i\n", prio);
1388                         }
1389                         pos = strstr(value, "event_timeout=");
1390                         if (pos != NULL) {
1391                                 int tout = atoi(&pos[strlen("event_timeout=")]);
1392
1393                                 rule_add_token(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1394                                 dbg(rules->udev, "event timout=%i\n", tout);
1395                         }
1396                         pos = strstr(value, "string_escape=");
1397                         if (pos != NULL) {
1398                                 pos = &pos[strlen("string_escape=")];
1399                                 if (strncmp(pos, "none", strlen("none")) == 0)
1400                                         rule_add_token(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1401                                 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1402                                         rule_add_token(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1403                         }
1404                         if (strstr(value, "all_partitions") != NULL) {
1405                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1406
1407                                 rule_add_token(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1408                                 dbg(rules->udev, "creation of partition nodes requested\n");
1409                         }
1410                         valid = 1;
1411                         continue;
1412                 }
1413                 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1414         }
1415
1416         if (physdev)
1417                 err(rules->udev, "PHYSDEV* values are deprecated and not available on recent kernels, \n"
1418                     "please fix it in %s:%u", filename, lineno);
1419
1420         /* skip line if not any valid key was found */
1421         if (!valid)
1422                 goto invalid;
1423
1424         /* add rule token */
1425         if (add_token(rules, &rule_tmp.rule) != 0)
1426                 goto invalid;
1427
1428         /* add tokens to list, sorted by type */
1429         if (sort_token(rules, &rule_tmp) != 0)
1430                 goto invalid;
1431         return 0;
1432 invalid:
1433         err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1434         return -1;
1435 }
1436
1437 static int parse_file(struct udev_rules *rules, const char *filename)
1438 {
1439         FILE *f;
1440         unsigned int filename_off;
1441         unsigned int first_token;
1442         char line[UTIL_LINE_SIZE];
1443         int line_nr = 0;
1444         unsigned int i;
1445
1446         info(rules->udev, "reading '%s' as rules file\n", filename);
1447
1448         f = fopen(filename, "r");
1449         if (f == NULL)
1450                 return -1;
1451
1452         filename_off = add_string(rules, filename);
1453         first_token = rules->token_cur;
1454
1455         while(fgets(line, sizeof(line), f) != NULL) {
1456                 char *key;
1457                 size_t len;
1458
1459                 /* skip whitespace */
1460                 line_nr++;
1461                 key = line;
1462                 while (isspace(key[0]))
1463                         key++;
1464
1465                 /* comment */
1466                 if (key[0] == '#')
1467                         continue;
1468
1469                 len = strlen(line);
1470                 if (len < 3)
1471                         continue;
1472
1473                 /* continue reading if backslash+newline is found */
1474                 while (line[len-2] == '\\') {
1475                         if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1476                                 break;
1477                         line_nr++;
1478                         len = strlen(line);
1479                 }
1480
1481                 if (len+1 >= sizeof(line)) {
1482                         err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1483                         continue;
1484                 }
1485                 add_rule(rules, key, filename, filename_off, line_nr);
1486         }
1487         fclose(f);
1488
1489         /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1490         for (i = first_token+1; i < rules->token_cur; i++) {
1491                 if (rules->tokens[i].type == TK_A_GOTO) {
1492                         char *label = &rules->buf[rules->tokens[i].key.value_off];
1493                         unsigned int j;
1494
1495                         for (j = i+1; j < rules->token_cur; j++) {
1496                                 if (rules->tokens[j].type != TK_RULE)
1497                                         continue;
1498                                 if (rules->tokens[j].rule.label_off == 0)
1499                                         continue;
1500                                 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1501                                         continue;
1502                                 rules->tokens[i].key.rule_goto = j;
1503                         }
1504                         if (rules->tokens[i].key.rule_goto == 0)
1505                                 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1506                 }
1507         }
1508         return 0;
1509 }
1510
1511 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1512 {
1513         struct dirent *ent;
1514         DIR *dir;
1515         char filename[UTIL_PATH_SIZE];
1516
1517         dbg(udev, "open directory '%s'\n", dirname);
1518         dir = opendir(dirname);
1519         if (dir == NULL) {
1520                 err(udev, "unable to open '%s': %m\n", dirname);
1521                 return -1;
1522         }
1523
1524         while (1) {
1525                 ent = readdir(dir);
1526                 if (ent == NULL || ent->d_name[0] == '\0')
1527                         break;
1528
1529                 if ((ent->d_name[0] == '.') || (ent->d_name[0] == '#'))
1530                         continue;
1531
1532                 /* look for file matching with specified suffix */
1533                 if (suffix != NULL) {
1534                         const char *ext;
1535
1536                         ext = strrchr(ent->d_name, '.');
1537                         if (ext == NULL)
1538                                 continue;
1539                         if (strcmp(ext, suffix) != 0)
1540                                 continue;
1541                 }
1542                 dbg(udev, "put file '%s/%s' into list\n", dirname, ent->d_name);
1543
1544                 snprintf(filename, sizeof(filename), "%s/%s", dirname, ent->d_name);
1545                 filename[sizeof(filename)-1] = '\0';
1546                 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1547         }
1548
1549         closedir(dir);
1550         return 0;
1551 }
1552
1553 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1554 {
1555         struct udev_rules *rules;
1556         struct stat statbuf;
1557         char filename[PATH_MAX];
1558         struct udev_list_node file_list;
1559         struct udev_list_entry *file_loop, *file_tmp;
1560         unsigned int prev_rule;
1561         struct token end_token;
1562         unsigned int i;
1563
1564         rules = malloc(sizeof(struct udev_rules));
1565         if (rules == NULL)
1566                 return NULL;
1567         memset(rules, 0x00, sizeof(struct udev_rules));
1568         rules->udev = udev;
1569         rules->resolve_names = resolve_names;
1570         udev_list_init(&file_list);
1571
1572         /* init token array and string buffer */
1573         rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1574         if (rules->tokens == NULL)
1575                 return NULL;
1576         rules->token_max = PREALLOC_TOKEN;
1577         rules->buf = malloc(PREALLOC_STRBUF);
1578         if (rules->buf == NULL)
1579                 return NULL;
1580         rules->buf_max = PREALLOC_STRBUF;
1581         /* offset 0 is always '\0' */
1582         rules->buf[0] = '\0';
1583         rules->buf_cur = 1;
1584         info(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1585              rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1586
1587         if (udev_get_rules_path(udev) != NULL) {
1588                 /* custom rules location for testing */
1589                 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1590         } else {
1591                 struct udev_list_node sort_list;
1592                 struct udev_list_entry *sort_loop, *sort_tmp;
1593
1594                 /* read user/custom rules */
1595                 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1596
1597                 /* read dynamic/temporary rules */
1598                 util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
1599                 util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
1600                 if (stat(filename, &statbuf) != 0) {
1601                         util_create_path(udev, filename);
1602                         udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1603                         mkdir(filename, 0755);
1604                         udev_selinux_resetfscreatecon(udev);
1605                 }
1606                 udev_list_init(&sort_list);
1607                 add_matching_files(udev, &sort_list, filename, ".rules");
1608
1609                 /* read default rules */
1610                 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1611
1612                 /* sort all rules files by basename into list of files */
1613                 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1614                         const char *sort_name = udev_list_entry_get_name(sort_loop);
1615                         const char *sort_base = strrchr(sort_name, '/');
1616
1617                         if (sort_base == NULL)
1618                                 continue;
1619
1620                         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1621                                 const char *file_name = udev_list_entry_get_name(file_loop);
1622                                 const char *file_base = strrchr(file_name, '/');
1623
1624                                 if (file_base == NULL)
1625                                         continue;
1626                                 if (strcmp(file_base, sort_base) == 0) {
1627                                         info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1628                                              file_name, sort_name);
1629                                         udev_list_entry_remove(sort_loop);
1630                                         sort_loop = NULL;
1631                                         break;
1632                                 }
1633                                 if (strcmp(file_base, sort_base) > 0)
1634                                         break;
1635                         }
1636                         if (sort_loop != NULL)
1637                                 udev_list_entry_move_before(sort_loop, file_loop);
1638                 }
1639         }
1640
1641         /* parse list of files */
1642         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1643                 const char *file_name = udev_list_entry_get_name(file_loop);
1644
1645                 if (stat(file_name, &statbuf) == 0 && statbuf.st_size > 0)
1646                         parse_file(rules, file_name);
1647                 else
1648                         info(udev, "can not read '%s'\n", file_name);
1649                 udev_list_entry_remove(file_loop);
1650         }
1651
1652         memset(&end_token, 0x00, sizeof(struct token));
1653         end_token.type = TK_END;
1654         add_token(rules, &end_token);
1655
1656         /* link all TK_RULE tokens to be able to fast-forward to next TK_RULE */
1657         prev_rule = 0;
1658         for (i = 1; i < rules->token_cur; i++) {
1659                 if (rules->tokens[i].type == TK_RULE) {
1660                         rules->tokens[prev_rule].rule.next_rule = i;
1661                         prev_rule = i;
1662                 }
1663         }
1664
1665         /* shrink allocated token and string buffer */
1666         if (rules->token_cur < rules->token_max) {
1667                 struct token *tokens;
1668
1669                 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1670                 if (tokens != NULL || rules->token_cur == 0) {
1671                         rules->tokens = tokens;
1672                         rules->token_max = rules->token_cur;
1673                 }
1674         }
1675         if (rules->buf_cur < rules->buf_max) {
1676                 char *buf;
1677
1678                 buf = realloc(rules->buf, rules->buf_cur);
1679                 if (buf != NULL || rules->buf_cur == 0) {
1680                         rules->buf = buf;
1681                         rules->buf_max = rules->buf_cur;
1682                 }
1683         }
1684         info(udev, "shrunk to %lu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1685              rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1686
1687         /* cleanup uid/gid cache */
1688         free(rules->uids);
1689         rules->uids = NULL;
1690         rules->uids_cur = 0;
1691         rules->uids_max = 0;
1692         free(rules->gids);
1693         rules->gids = NULL;
1694         rules->gids_cur = 0;
1695         rules->gids_max = 0;
1696
1697         dump_rules(rules);
1698         return rules;
1699 }
1700
1701 void udev_rules_unref(struct udev_rules *rules)
1702 {
1703         if (rules == NULL)
1704                 return;
1705         free(rules->tokens);
1706         free(rules->buf);
1707         free(rules->uids);
1708         free(rules->gids);
1709         free(rules);
1710 }
1711
1712 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1713 {
1714         char *key_value = &rules->buf[token->key.value_off];
1715         char *pos;
1716         int match = 0;
1717
1718         if (val == NULL)
1719                 val = "";
1720
1721         switch (token->key.glob) {
1722         case GL_PLAIN:
1723                 match = (strcmp(key_value, val) == 0);
1724                 break;
1725         case GL_GLOB:
1726                 match = (fnmatch(key_value, val, 0) == 0);
1727                 break;
1728         case GL_SPLIT:
1729                 {
1730                         const char *split;
1731                         size_t len;
1732
1733                         split = &rules->buf[token->key.value_off];
1734                         len = strlen(val);
1735                         while (1) {
1736                                 const char *next;
1737
1738                                 next = strchr(split, '|');
1739                                 if (next != NULL) {
1740                                         size_t matchlen = (size_t)(next - split);
1741
1742                                         match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1743                                         if (match)
1744                                                 break;
1745                                 } else {
1746                                         match = (strcmp(split, val) == 0);
1747                                         break;
1748                                 }
1749                                 split = &next[1];
1750                         }
1751                         break;
1752                 }
1753         case GL_SPLIT_GLOB:
1754                 {
1755                         char value[UTIL_PATH_SIZE];
1756
1757                         util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value));
1758                         key_value = value;
1759                         while (key_value != NULL) {
1760                                 pos = strchr(key_value, '|');
1761                                 if (pos != NULL) {
1762                                         pos[0] = '\0';
1763                                         pos = &pos[1];
1764                                 }
1765                                 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str[token->type], key_value, val);
1766                                 match = (fnmatch(key_value, val, 0) == 0);
1767                                 if (match)
1768                                         break;
1769                                 key_value = pos;
1770                         }
1771                         break;
1772                 }
1773         case GL_SOMETHING:
1774                 match = (val[0] != '\0');
1775                 break;
1776         case GL_FORMAT:
1777         case GL_UNSET:
1778                 return -1;
1779         }
1780
1781         if (match && (token->key.op == OP_MATCH)) {
1782                 dbg(rules->udev, "%s is true (matching value)\n", token_str[token->type]);
1783                 return 0;
1784         }
1785         if (!match && (token->key.op == OP_NOMATCH)) {
1786                 dbg(rules->udev, "%s is true (non-matching value)\n", token_str[token->type]);
1787                 return 0;
1788         }
1789         dbg(rules->udev, "%s is not true\n", token_str[token->type]);
1790         return -1;
1791 }
1792
1793 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1794 {
1795         const char *key_name = &rules->buf[cur->key.attr_off];
1796         const char *key_value = &rules->buf[cur->key.value_off];
1797         char value[UTIL_NAME_SIZE];
1798         size_t len;
1799
1800         value[0] = '\0';
1801         if (key_name[0] == '[') {
1802                 char attr[UTIL_PATH_SIZE];
1803
1804                 util_strlcpy(attr, key_name, sizeof(attr));
1805                 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
1806         }
1807         if (value[0] == '\0') {
1808                 const char *val;
1809
1810                 val = udev_device_get_sysattr_value(dev, key_name);
1811                 if (val != NULL)
1812                         util_strlcpy(value, val, sizeof(value));
1813         }
1814         if (value[0] == '\0')
1815                 return -1;
1816
1817         /* strip trailing whitespace of value, if not asked to match for it */
1818         len = strlen(key_value);
1819         if (len > 0 && !isspace(key_value[len-1])) {
1820                 len = strlen(value);
1821                 while (len > 0 && isspace(value[--len]))
1822                         value[len] = '\0';
1823                 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1824         }
1825         return match_key(rules, cur, value);
1826 }
1827
1828 enum escape_type {
1829         ESCAPE_UNSET,
1830         ESCAPE_NONE,
1831         ESCAPE_REPLACE,
1832 };
1833
1834 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
1835 {
1836         struct token *cur;
1837         struct token *rule;
1838         enum escape_type esc = ESCAPE_UNSET;
1839
1840         if (rules->tokens == NULL)
1841                 return -1;
1842
1843         /* loop through token list, match, run actions or forward to next rule */
1844         cur = &rules->tokens[0];
1845         rule = cur;
1846         while (cur != NULL && cur->type != TK_END) {
1847                 unsigned int idx;
1848
1849                 dump_token(rules, cur);
1850                 switch (cur->type) {
1851                 case TK_RULE:
1852                         /* current rule */
1853                         rule = cur;
1854                         esc = ESCAPE_UNSET;
1855                         break;
1856                 case TK_M_ACTION:
1857                         if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1858                                 goto nomatch;
1859                         break;
1860                 case TK_M_DEVPATH:
1861                         if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1862                                 goto nomatch;
1863                         break;
1864                 case TK_M_KERNEL:
1865                         if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1866                                 goto nomatch;
1867                         break;
1868                 case TK_M_DEVLINK:
1869                         {
1870                                 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
1871                                 struct udev_list_entry *list_entry;
1872                                 int match = 0;
1873
1874                                 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1875                                         const char *devlink;
1876
1877                                         devlink =  &udev_list_entry_get_name(list_entry)[devlen];
1878                                         if (match_key(rules, cur, devlink) == 0) {
1879                                                 match = 1;
1880                                                 break;
1881                                         }
1882                                 }
1883                                 if (!match)
1884                                         goto nomatch;
1885                                 break;
1886                         }
1887                 case TK_M_NAME:
1888                         if (match_key(rules, cur, event->name) != 0)
1889                                 goto nomatch;
1890                         break;
1891                 case TK_M_ENV:
1892                         {
1893                                 struct udev_list_entry *list_entry;
1894                                 const char *key_name = &rules->buf[cur->key.attr_off];
1895                                 const char *value;
1896
1897                                 list_entry = udev_device_get_properties_list_entry(event->dev);
1898                                 list_entry = udev_list_entry_get_by_name(list_entry, key_name);
1899                                 value = udev_list_entry_get_value(list_entry);
1900                                 if (value == NULL) {
1901                                         dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
1902                                         value = "";
1903                                 }
1904                                 if (match_key(rules, cur, value))
1905                                         goto nomatch;
1906                                 break;
1907                         }
1908                 case TK_M_SUBSYSTEM:
1909                         if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1910                                 goto nomatch;
1911                         break;
1912                 case TK_M_DRIVER:
1913                         if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1914                                 goto nomatch;
1915                         break;
1916                 case TK_M_WAITFOR:
1917                         {
1918                                 char filename[UTIL_PATH_SIZE];
1919                                 int found;
1920
1921                                 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
1922                                 udev_event_apply_format(event, filename, sizeof(filename));
1923                                 found = (wait_for_file(event->dev, filename, 10) == 0);
1924                                 if (!found && (cur->key.op != OP_NOMATCH))
1925                                         goto nomatch;
1926                                 break;
1927                         }
1928                 case TK_M_ATTR:
1929                         if (match_attr(rules, event->dev, event, cur) != 0)
1930                                 goto nomatch;
1931                         break;
1932                 case TK_M_KERNELS:
1933                 case TK_M_SUBSYSTEMS:
1934                 case TK_M_DRIVERS:
1935                 case TK_M_ATTRS:
1936                         {
1937                                 struct token *next;
1938
1939                                 /* get whole sequence of parent matches */
1940                                 next = cur;
1941                                 while (next->type < TK_M_PARENTS_MAX)
1942                                         next++;
1943
1944                                 /* loop over parents */
1945                                 event->dev_parent = event->dev;
1946                                 while (1) {
1947                                         struct token *key;
1948
1949                                         dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
1950                                         /* loop over sequence of parent match keys */
1951                                         for (key = cur; key < next; key++ ) {
1952                                                 dump_token(rules, key);
1953                                                 switch(key->type) {
1954                                                 case TK_M_KERNELS:
1955                                                         if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
1956                                                                 goto try_parent;
1957                                                         break;
1958                                                 case TK_M_SUBSYSTEMS:
1959                                                         if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
1960                                                                 goto try_parent;
1961                                                         break;
1962                                                 case TK_M_DRIVERS:
1963                                                         if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
1964                                                                 goto try_parent;
1965                                                         break;
1966                                                 case TK_M_ATTRS:
1967                                                         if (match_attr(rules, event->dev_parent, event, key) != 0)
1968                                                                 goto try_parent;
1969                                                         break;
1970                                                 default:
1971                                                         goto nomatch;
1972                                                 }
1973                                                 dbg(event->udev, "parent key matched\n");
1974                                         }
1975                                         dbg(event->udev, "all parent keys matched\n");
1976                                         /* all keys matched */
1977                                         break;
1978
1979                                 try_parent:
1980                                         event->dev_parent = udev_device_get_parent(event->dev_parent);
1981                                         if (event->dev_parent == NULL)
1982                                                 goto nomatch;
1983                                 }
1984                                 /* move behind our sequence of parent match keys */
1985                                 cur = next;
1986                                 continue;
1987                         }
1988                 case TK_M_TEST:
1989                         {
1990                                 char filename[UTIL_PATH_SIZE];
1991                                 struct stat statbuf;
1992                                 int match;
1993
1994                                 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
1995                                 udev_event_apply_format(event, filename, sizeof(filename));
1996                                 if (util_resolve_subsys_kernel(event->udev, NULL, filename, sizeof(filename), 0) != 0)
1997                                         if (filename[0] != '/') {
1998                                                 char tmp[UTIL_PATH_SIZE];
1999
2000                                                 util_strlcpy(tmp, udev_device_get_syspath(event->dev), sizeof(tmp));
2001                                                 util_strlcat(tmp, "/", sizeof(tmp));
2002                                                 util_strlcat(tmp, filename, sizeof(tmp));
2003                                                 util_strlcpy(filename, tmp, sizeof(filename));
2004                                         }
2005
2006                                 attr_subst_subdir(filename, sizeof(filename));
2007
2008                                 match = (stat(filename, &statbuf) == 0);
2009                                 info(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2010                                 if (match && cur->key.mode > 0) {
2011                                         match = ((statbuf.st_mode & cur->key.mode) > 0);
2012                                         info(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2013                                              match ? "matches" : "does not match", cur->key.mode);
2014                                 }
2015                                 if (match && cur->key.op == OP_NOMATCH)
2016                                         goto nomatch;
2017                                 if (!match && cur->key.op == OP_MATCH)
2018                                         goto nomatch;
2019                                 break;
2020                         }
2021                 case TK_M_PROGRAM:
2022                         {
2023                                 char program[UTIL_PATH_SIZE];
2024                                 char **envp;
2025                                 char result[UTIL_PATH_SIZE];
2026
2027                                 free(event->program_result);
2028                                 event->program_result = NULL;
2029                                 util_strlcpy(program, &rules->buf[cur->key.value_off], sizeof(program));
2030                                 udev_event_apply_format(event, program, sizeof(program));
2031                                 envp = udev_device_get_properties_envp(event->dev);
2032                                 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2033                                         if (cur->key.op != OP_NOMATCH)
2034                                                 goto nomatch;
2035                                 } else {
2036                                         int count;
2037
2038                                         util_remove_trailing_chars(result, '\n');
2039                                         if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2040                                                 count = util_replace_chars(result, ALLOWED_CHARS_INPUT);
2041                                                 if (count > 0)
2042                                                         info(event->udev, "%i character(s) replaced\n" , count);
2043                                         }
2044                                         event->program_result = strdup(result);
2045                                         dbg(event->udev, "storing result '%s'\n", event->program_result);
2046                                         if (cur->key.op == OP_NOMATCH)
2047                                                 goto nomatch;
2048                                 }
2049                                 break;
2050                         }
2051                 case TK_M_IMPORT_FILE:
2052                         {
2053                                 char import[UTIL_PATH_SIZE];
2054
2055                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2056                                 udev_event_apply_format(event, import, sizeof(import));
2057                                 if (import_file_into_properties(event->dev, import) != 0)
2058                                         if (cur->key.op != OP_NOMATCH)
2059                                                 goto nomatch;
2060                                 break;
2061                         }
2062                 case TK_M_IMPORT_PROG:
2063                         {
2064                                 char import[UTIL_PATH_SIZE];
2065
2066                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2067                                 udev_event_apply_format(event, import, sizeof(import));
2068                                 if (import_program_into_properties(event->dev, import) != 0)
2069                                         if (cur->key.op != OP_NOMATCH)
2070                                                 goto nomatch;
2071                                 break;
2072                         }
2073                 case TK_M_IMPORT_PARENT:
2074                         {
2075                                 char import[UTIL_PATH_SIZE];
2076
2077                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2078                                 udev_event_apply_format(event, import, sizeof(import));
2079                                 if (import_parent_into_properties(event->dev, import) != 0)
2080                                         if (cur->key.op != OP_NOMATCH)
2081                                                 goto nomatch;
2082                                 break;
2083                         }
2084                 case TK_M_RESULT:
2085                         if (match_key(rules, cur, event->program_result) != 0)
2086                                 goto nomatch;
2087                         break;
2088
2089                 case TK_A_IGNORE_DEVICE:
2090                         event->ignore_device = 1;
2091                         return 0;
2092                         break;
2093                 case TK_A_STRING_ESCAPE_NONE:
2094                         esc = ESCAPE_NONE;
2095                         break;
2096                 case TK_A_STRING_ESCAPE_REPLACE:
2097                         esc = ESCAPE_REPLACE;
2098                         break;
2099                 case TK_A_NUM_FAKE_PART:
2100                         if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2101                                 break;
2102                         if (udev_device_get_sysnum(event->dev) != NULL)
2103                                 break;
2104                         udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2105                         break;
2106                 case TK_A_DEVLINK_PRIO:
2107                         udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2108                         break;
2109                 case TK_A_OWNER:
2110                         {
2111                                 char owner[UTIL_NAME_SIZE];
2112
2113                                 if (event->owner_final)
2114                                         break;
2115                                 if (cur->key.op == OP_ASSIGN_FINAL)
2116                                         event->owner_final = 1;
2117                                 util_strlcpy(owner,  &rules->buf[cur->key.value_off], sizeof(owner));
2118                                 udev_event_apply_format(event, owner, sizeof(owner));
2119                                 event->uid = util_lookup_user(event->udev, owner);
2120                                 break;
2121                         }
2122                 case TK_A_GROUP:
2123                         {
2124                                 char group[UTIL_NAME_SIZE];
2125
2126                                 if (event->group_final)
2127                                         break;
2128                                 if (cur->key.op == OP_ASSIGN_FINAL)
2129                                         event->group_final = 1;
2130                                 util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group));
2131                                 udev_event_apply_format(event, group, sizeof(group));
2132                                 event->gid = util_lookup_group(event->udev, group);
2133                                 break;
2134                         }
2135                 case TK_A_MODE:
2136                         {
2137                                 char mode[UTIL_NAME_SIZE];
2138                                 char *endptr;
2139
2140                                 if (event->mode_final)
2141                                         break;
2142                                 if (cur->key.op == OP_ASSIGN_FINAL)
2143                                         event->mode_final = 1;
2144                                 util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode));
2145                                 udev_event_apply_format(event, mode, sizeof(mode));
2146                                 event->mode = strtol(mode, &endptr, 8);
2147                                 if (endptr[0] != '\0') {
2148                                         err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2149                                         event->mode = 0660;
2150                                 }
2151                                 break;
2152                         }
2153                 case TK_A_OWNER_ID:
2154                         if (event->owner_final)
2155                                 break;
2156                         if (cur->key.op == OP_ASSIGN_FINAL)
2157                                 event->owner_final = 1;
2158                         event->uid = cur->key.uid;
2159                         break;
2160                 case TK_A_GROUP_ID:
2161                         if (event->group_final)
2162                                 break;
2163                         if (cur->key.op == OP_ASSIGN_FINAL)
2164                                 event->group_final = 1;
2165                         event->gid = cur->key.gid;
2166                         break;
2167                 case TK_A_MODE_ID:
2168                         if (event->mode_final)
2169                                 break;
2170                         if (cur->key.op == OP_ASSIGN_FINAL)
2171                                 event->mode_final = 1;
2172                         event->mode = cur->key.mode;
2173                         break;
2174                 case TK_A_ENV:
2175                         {
2176                                 const char *name = &rules->buf[cur->key.attr_off];
2177                                 char *value = &rules->buf[cur->key.value_off];
2178
2179                                 if (value[0] != '\0') {
2180                                         char temp_value[UTIL_NAME_SIZE];
2181                                         struct udev_list_entry *entry;
2182
2183                                         util_strlcpy(temp_value, value, sizeof(temp_value));
2184                                         udev_event_apply_format(event, temp_value, sizeof(temp_value));
2185                                         entry = udev_device_add_property(event->dev, name, temp_value);
2186                                         /* store in db */
2187                                         udev_list_entry_set_flag(entry, 1);
2188                                 } else {
2189                                         udev_device_add_property(event->dev, name, NULL);
2190                                 }
2191                                 break;
2192                         }
2193                 case TK_A_NAME:
2194                         {
2195                                 const char *name  = &rules->buf[cur->key.value_off];
2196                                 char name_str[UTIL_PATH_SIZE];
2197                                 int count;
2198
2199                                 if (event->name_final)
2200                                         break;
2201                                 if (cur->key.op == OP_ASSIGN_FINAL)
2202                                         event->name_final = 1;
2203                                 if (name[0] == '\0') {
2204                                         free(event->name);
2205                                         event->name = NULL;
2206                                         break;
2207                                 }
2208                                 util_strlcpy(name_str, name, sizeof(name_str));
2209                                 udev_event_apply_format(event, name_str, sizeof(name_str));
2210                                 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2211                                         count = util_replace_chars(name_str, ALLOWED_CHARS_FILE);
2212                                         if (count > 0)
2213                                                 info(event->udev, "%i character(s) replaced\n", count);
2214                                         free(event->name);
2215                                         event->name = strdup(name_str);
2216                                 }
2217                                 break;
2218                         }
2219                 case TK_A_DEVLINK:
2220                         {
2221                                 char temp[UTIL_PATH_SIZE];
2222                                 char filename[UTIL_PATH_SIZE];
2223                                 char *pos, *next;
2224                                 int count = 0;
2225
2226                                 if (event->devlink_final)
2227                                         break;
2228                                 if (major(udev_device_get_devnum(event->dev)) == 0)
2229                                         break;
2230                                 if (cur->key.op == OP_ASSIGN_FINAL)
2231                                         event->devlink_final = 1;
2232                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2233                                         udev_device_cleanup_devlinks_list(event->dev);
2234
2235                                 /* allow  multiple symlinks separated by spaces */
2236                                 util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));
2237                                 udev_event_apply_format(event, temp, sizeof(temp));
2238                                 if (esc == ESCAPE_UNSET)
2239                                         count = util_replace_chars(temp, ALLOWED_CHARS_FILE " ");
2240                                 else if (esc == ESCAPE_REPLACE)
2241                                         count = util_replace_chars(temp, ALLOWED_CHARS_FILE);
2242                                 if (count > 0)
2243                                         info(event->udev, "%i character(s) replaced\n" , count);
2244                                 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2245                                 pos = temp;
2246                                 while (isspace(pos[0]))
2247                                         pos++;
2248                                 next = strchr(pos, ' ');
2249                                 while (next) {
2250                                         next[0] = '\0';
2251                                         info(event->udev, "add symlink '%s'\n", pos);
2252                                         util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2253                                         util_strlcat(filename, "/", sizeof(filename));
2254                                         util_strlcat(filename, pos, sizeof(filename));
2255                                         udev_device_add_devlink(event->dev, filename);
2256                                         while (isspace(next[1]))
2257                                                 next++;
2258                                         pos = &next[1];
2259                                         next = strchr(pos, ' ');
2260                                 }
2261                                 if (pos[0] != '\0') {
2262                                         info(event->udev, "add symlink '%s'\n", pos);
2263                                         util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2264                                         util_strlcat(filename, "/", sizeof(filename));
2265                                         util_strlcat(filename, pos, sizeof(filename));
2266                                         udev_device_add_devlink(event->dev, filename);
2267                                 }
2268                         }
2269                         break;
2270                 case TK_A_EVENT_TIMEOUT:
2271                         udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2272                         break;
2273                 case TK_A_IGNORE_REMOVE:
2274                         udev_device_set_ignore_remove(event->dev, 1);
2275                         break;
2276                 case TK_A_ATTR:
2277                         {
2278                                 const char *key_name = &rules->buf[cur->key.attr_off];
2279                                 char attr[UTIL_PATH_SIZE];
2280                                 char value[UTIL_NAME_SIZE];
2281                                 FILE *f;
2282
2283                                 util_strlcpy(attr, key_name, sizeof(attr));
2284                                 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) {
2285                                         util_strlcpy(attr, udev_device_get_syspath(event->dev), sizeof(attr));
2286                                         util_strlcat(attr, "/", sizeof(attr));
2287                                         util_strlcat(attr, key_name, sizeof(attr));
2288                                 }
2289
2290                                 attr_subst_subdir(attr, sizeof(attr));
2291
2292                                 util_strlcpy(value, &rules->buf[cur->key.value_off], sizeof(value));
2293                                 udev_event_apply_format(event, value, sizeof(value));
2294                                 info(event->udev, "writing '%s' to sysfs file '%s'\n", value, attr);
2295                                 f = fopen(attr, "w");
2296                                 if (f != NULL) {
2297                                         if (!event->test)
2298                                                 if (fprintf(f, "%s", value) <= 0)
2299                                                         err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2300                                         fclose(f);
2301                                 } else {
2302                                         err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2303                                 }
2304                                 break;
2305                         }
2306                 case TK_A_RUN:
2307                         {
2308                                 struct udev_list_entry *list_entry;
2309
2310                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2311                                         udev_list_cleanup_entries(event->udev, &event->run_list);
2312                                 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2313                                                                  &rules->buf[cur->key.value_off], NULL, 1, 0);
2314                                 if (cur->key.ignore_error)
2315                                         udev_list_entry_set_flag(list_entry, 1);
2316                                 break;
2317                         }
2318                 case TK_A_GOTO:
2319                         cur = &rules->tokens[cur->key.rule_goto];
2320                         continue;
2321                 case TK_A_LAST_RULE:
2322                         break;
2323
2324                 case TK_M_PARENTS_MAX:
2325                 case TK_M_MAX:
2326                 case TK_END:
2327                 case TK_UNSET:
2328                         err(rules->udev, "wrong type %u\n", cur->type);
2329                         goto nomatch;
2330                 }
2331
2332                 cur++;
2333                 continue;
2334         nomatch:
2335                 /* fast-forward to next rule */
2336                 idx = rule->rule.next_rule;
2337                 if (idx == 0)
2338                         break;
2339                 dbg(rules->udev, "forward to rule: %u\n", idx);
2340                 cur = &rules->tokens[idx];
2341         }
2342         return 0;
2343 }