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