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 <limits.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <stdio.h>
  23 #include <fcntl.h>
  24 #include <ctype.h>
  25 #include <unistd.h>
  26 #include <errno.h>
  27 #include <dirent.h>
  28 #include <fnmatch.h>
  29
  30 #include "udev.h"
  31
  32 #define PREALLOC_TOKEN                  2048
  33 #define PREALLOC_STRBUF                 32 * 1024
  34 #define PREALLOC_TRIE                   256
  35
  36 struct uid_gid {
  37         unsigned int name_off;
  38         union {
  39                 uid_t   uid;
  40                 gid_t   gid;
  41         };
  42 };
  43
  44 #define TRIE_CHILD_MAX 10
  45
  46 struct trie_node {
  47         unsigned int value_off;
  48         size_t value_len;
  49         unsigned char child_cur;
  50         unsigned char child_key[TRIE_CHILD_MAX];
  51         unsigned short child[TRIE_CHILD_MAX];
  52 };
  53
  54 struct udev_rules {
  55         struct udev *udev;
  56         int resolve_names;
  57
  58         /* every key in the rules file becomes a token */
  59         struct token *tokens;
  60         unsigned int token_cur;
  61         unsigned int token_max;
  62
  63         /* all key strings are copied to a single string buffer */
  64         char *buf;
  65         size_t buf_cur;
  66         size_t buf_max;
  67         unsigned int buf_count;
  68
  69         /* key strings are indexed to avoid wasting space with duplicates */
  70         struct trie_node *trie;
  71         unsigned short trie_cur;
  72         unsigned short trie_max;
  73         unsigned short *trie_root;
  74
  75         /* during rule parsing, we cache uid/gid lookup results */
  76         struct uid_gid *uids;
  77         unsigned int uids_cur;
  78         unsigned int uids_max;
  79         struct uid_gid *gids;
  80         unsigned int gids_cur;
  81         unsigned int gids_max;
  82 };
  83
  84 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
  85 enum operation_type {
  86         OP_UNSET,
  87
  88         OP_MATCH,
  89         OP_NOMATCH,
  90         OP_MATCH_MAX,
  91
  92         OP_ADD,
  93         OP_ASSIGN,
  94         OP_ASSIGN_FINAL,
  95 };
  96
  97 enum string_glob_type {
  98         GL_UNSET,
  99         GL_PLAIN,                       /* no special chars */
 100         GL_GLOB,                        /* shell globs ?,*,[] */
 101         GL_SPLIT,                       /* multi-value A|B */
 102         GL_SPLIT_GLOB,                  /* multi-value with glob A*|B* */
 103         GL_SOMETHING,                   /* commonly used "?*" */
 104         GL_FORMAT,
 105 };
 106
 107 /* tokens of a rule are sorted/handled in this order */
 108 enum token_type {
 109         TK_UNSET,
 110         TK_RULE,
 111
 112         TK_M_ACTION,                    /* val */
 113         TK_M_DEVPATH,                   /* val */
 114         TK_M_KERNEL,                    /* val */
 115         TK_M_DEVLINK,                   /* val */
 116         TK_M_NAME,                      /* val */
 117         TK_M_ENV,                       /* val, attr */
 118         TK_M_SUBSYSTEM,                 /* val */
 119         TK_M_DRIVER,                    /* val */
 120         TK_M_WAITFOR,                   /* val */
 121         TK_M_ATTR,                      /* val, attr */
 122
 123         TK_M_PARENTS_MIN,
 124         TK_M_KERNELS,                   /* val */
 125         TK_M_SUBSYSTEMS,                /* val */
 126         TK_M_DRIVERS,                   /* val */
 127         TK_M_ATTRS,                     /* val, attr */
 128         TK_M_PARENTS_MAX,
 129
 130         TK_M_TEST,                      /* val, mode_t */
 131         TK_M_PROGRAM,                   /* val */
 132         TK_M_IMPORT_FILE,               /* val */
 133         TK_M_IMPORT_PROG,               /* val */
 134         TK_M_IMPORT_PARENT,             /* val */
 135         TK_M_RESULT,                    /* val */
 136         TK_M_MAX,
 137
 138         TK_A_IGNORE_DEVICE,
 139         TK_A_STRING_ESCAPE_NONE,
 140         TK_A_STRING_ESCAPE_REPLACE,
 141         TK_A_NUM_FAKE_PART,             /* int */
 142         TK_A_DEVLINK_PRIO,              /* int */
 143         TK_A_OWNER,                     /* val */
 144         TK_A_GROUP,                     /* val */
 145         TK_A_MODE,                      /* val */
 146         TK_A_OWNER_ID,                  /* uid_t */
 147         TK_A_GROUP_ID,                  /* gid_t */
 148         TK_A_MODE_ID,                   /* mode_t */
 149         TK_A_ENV,                       /* val, attr */
 150         TK_A_NAME,                      /* val */
 151         TK_A_DEVLINK,                   /* val */
 152         TK_A_EVENT_TIMEOUT,             /* int */
 153         TK_A_IGNORE_REMOVE,
 154         TK_A_ATTR,                      /* val, attr */
 155         TK_A_RUN,                       /* val, bool */
 156         TK_A_GOTO,                      /* size_t */
 157         TK_A_LAST_RULE,
 158
 159         TK_END,
 160 };
 161
 162 /* we try to pack stuff in a way that we take only 12 bytes per token */
 163 struct token {
 164         union {
 165                 unsigned char type;             /* same as in rule and key */
 166                 struct {
 167                         unsigned char type;
 168                         unsigned char flags;
 169                         unsigned short token_count;
 170                         unsigned int label_off;
 171                         unsigned short filename_off;
 172                         unsigned short filename_line;
 173                 } rule;
 174                 struct {
 175                         unsigned char type;
 176                         unsigned char flags;
 177                         unsigned char op;
 178                         unsigned char glob;
 179                         unsigned int value_off;
 180                         union {
 181                                 unsigned int attr_off;
 182                                 int ignore_error;
 183                                 int i;
 184                                 unsigned int rule_goto;
 185                                 mode_t  mode;
 186                                 uid_t uid;
 187                                 gid_t gid;
 188                                 int num_fake_part;
 189                                 int devlink_prio;
 190                                 int event_timeout;
 191                         };
 192                 } key;
 193         };
 194 };
 195
 196 #define MAX_TK          64
 197 struct rule_tmp {
 198         struct udev_rules *rules;
 199         struct token rule;
 200         struct token token[MAX_TK];
 201         unsigned int token_cur;
 202 };
 203
 204 #ifdef DEBUG
 205 static const char *operation_str(enum operation_type type)
 206 {
 207         static const char *operation_strs[] = {
 208                 [OP_UNSET] =            "UNSET",
 209                 [OP_MATCH] =            "match",
 210                 [OP_NOMATCH] =          "nomatch",
 211                 [OP_MATCH_MAX] =        "MATCH_MAX",
 212
 213                 [OP_ADD] =              "add",
 214                 [OP_ASSIGN] =           "assign",
 215                 [OP_ASSIGN_FINAL] =     "assign-final",
 216 }       ;
 217
 218         return operation_strs[type];
 219 }
 220
 221 static const char *string_glob_str(enum string_glob_type type)
 222 {
 223         static const char *string_glob_strs[] = {
 224                 [GL_UNSET] =            "UNSET",
 225                 [GL_PLAIN] =            "plain",
 226                 [GL_GLOB] =             "glob",
 227                 [GL_SPLIT] =            "split",
 228                 [GL_SPLIT_GLOB] =       "split-glob",
 229                 [GL_SOMETHING] =        "split-glob",
 230                 [GL_FORMAT] =           "format",
 231         };
 232
 233         return string_glob_strs[type];
 234 }
 235
 236 static const char *token_str(enum token_type type)
 237 {
 238         static const char *token_strs[] = {
 239                 [TK_UNSET] =                    "UNSET",
 240                 [TK_RULE] =                     "RULE",
 241
 242                 [TK_M_ACTION] =                 "M ACTION",
 243                 [TK_M_DEVPATH] =                "M DEVPATH",
 244                 [TK_M_KERNEL] =                 "M KERNEL",
 245                 [TK_M_DEVLINK] =                "M DEVLINK",
 246                 [TK_M_NAME] =                   "M NAME",
 247                 [TK_M_ENV] =                    "M ENV",
 248                 [TK_M_SUBSYSTEM] =              "M SUBSYSTEM",
 249                 [TK_M_DRIVER] =                 "M DRIVER",
 250                 [TK_M_WAITFOR] =                "M WAITFOR",
 251                 [TK_M_ATTR] =                   "M ATTR",
 252
 253                 [TK_M_PARENTS_MIN] =            "M PARENTS_MIN",
 254                 [TK_M_KERNELS] =                "M KERNELS",
 255                 [TK_M_SUBSYSTEMS] =             "M SUBSYSTEMS",
 256                 [TK_M_DRIVERS] =                "M DRIVERS",
 257                 [TK_M_ATTRS] =                  "M ATTRS",
 258                 [TK_M_PARENTS_MAX] =            "M PARENTS_MAX",
 259
 260                 [TK_M_TEST] =                   "M TEST",
 261                 [TK_M_PROGRAM] =                "M PROGRAM",
 262                 [TK_M_IMPORT_FILE] =            "M IMPORT_FILE",
 263                 [TK_M_IMPORT_PROG] =            "M IMPORT_PROG",
 264                 [TK_M_IMPORT_PARENT] =          "M MPORT_PARENT",
 265                 [TK_M_RESULT] =                 "M RESULT",
 266                 [TK_M_MAX] =                    "M MAX",
 267
 268                 [TK_A_IGNORE_DEVICE] =          "A IGNORE_DEVICE",
 269                 [TK_A_STRING_ESCAPE_NONE] =     "A STRING_ESCAPE_NONE",
 270                 [TK_A_STRING_ESCAPE_REPLACE] =  "A STRING_ESCAPE_REPLACE",
 271                 [TK_A_NUM_FAKE_PART] =          "A NUM_FAKE_PART",
 272                 [TK_A_DEVLINK_PRIO] =           "A DEVLINK_PRIO",
 273                 [TK_A_OWNER] =                  "A OWNER",
 274                 [TK_A_GROUP] =                  "A GROUP",
 275                 [TK_A_MODE] =                   "A MODE",
 276                 [TK_A_OWNER_ID] =               "A OWNER_ID",
 277                 [TK_A_GROUP_ID] =               "A GROUP_ID",
 278                 [TK_A_MODE_ID] =                "A MODE_ID",
 279                 [TK_A_ENV] =                    "A ENV",
 280                 [TK_A_NAME] =                   "A NAME",
 281                 [TK_A_DEVLINK] =                "A DEVLINK",
 282                 [TK_A_EVENT_TIMEOUT] =          "A EVENT_TIMEOUT",
 283                 [TK_A_IGNORE_REMOVE] =          "A IGNORE_REMOVE",
 284                 [TK_A_ATTR] =                   "A ATTR",
 285                 [TK_A_RUN] =                    "A RUN",
 286                 [TK_A_GOTO] =                   "A GOTO",
 287                 [TK_A_LAST_RULE] =              "A LAST_RULE",
 288
 289                 [TK_END] =                      "END",
 290         };
 291
 292         return token_strs[type];
 293 }
 294
 295 static void dump_token(struct udev_rules *rules, struct token *token)
 296 {
 297         enum token_type type = token->type;
 298         enum operation_type op = token->key.op;
 299         enum string_glob_type glob = token->key.glob;
 300         const char *value = &rules->buf[token->key.value_off];
 301         const char *attr = &rules->buf[token->key.attr_off];
 302
 303         switch (type) {
 304         case TK_RULE:
 305                 {
 306                         const char *tks_ptr = (char *)rules->tokens;
 307                         const char *tk_ptr = (char *)token;
 308                         unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
 309
 310                         dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
 311                             &rules->buf[token->rule.filename_off], token->rule.filename_line,
 312                             idx, token->rule.token_count,
 313                             &rules->buf[token->rule.label_off],
 314                             token->rule.flags);
 315                         break;
 316                 }
 317         case TK_M_ACTION:
 318         case TK_M_DEVPATH:
 319         case TK_M_KERNEL:
 320         case TK_M_SUBSYSTEM:
 321         case TK_M_DRIVER:
 322         case TK_M_WAITFOR:
 323         case TK_M_DEVLINK:
 324         case TK_M_NAME:
 325         case TK_M_KERNELS:
 326         case TK_M_SUBSYSTEMS:
 327         case TK_M_DRIVERS:
 328         case TK_M_PROGRAM:
 329         case TK_M_IMPORT_FILE:
 330         case TK_M_IMPORT_PROG:
 331         case TK_M_IMPORT_PARENT:
 332         case TK_M_RESULT:
 333         case TK_A_NAME:
 334         case TK_A_DEVLINK:
 335         case TK_A_OWNER:
 336         case TK_A_GROUP:
 337         case TK_A_MODE:
 338         case TK_A_RUN:
 339                 dbg(rules->udev, "%s %s '%s'(%s)\n",
 340                     token_str(type), operation_str(op), value, string_glob_str(glob));
 341                 break;
 342         case TK_M_ATTR:
 343         case TK_M_ATTRS:
 344         case TK_M_ENV:
 345         case TK_A_ATTR:
 346         case TK_A_ENV:
 347                 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
 348                     token_str(type), operation_str(op), attr, value, string_glob_str(glob));
 349                 break;
 350         case TK_A_IGNORE_DEVICE:
 351         case TK_A_STRING_ESCAPE_NONE:
 352         case TK_A_STRING_ESCAPE_REPLACE:
 353         case TK_A_LAST_RULE:
 354         case TK_A_IGNORE_REMOVE:
 355                 dbg(rules->udev, "%s\n", token_str(type));
 356                 break;
 357         case TK_M_TEST:
 358                 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
 359                     token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
 360                 break;
 361         case TK_A_NUM_FAKE_PART:
 362                 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
 363                 break;
 364         case TK_A_DEVLINK_PRIO:
 365                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
 366                 break;
 367         case TK_A_OWNER_ID:
 368                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
 369                 break;
 370         case TK_A_GROUP_ID:
 371                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
 372                 break;
 373         case TK_A_MODE_ID:
 374                 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
 375                 break;
 376         case TK_A_EVENT_TIMEOUT:
 377                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
 378                 break;
 379         case TK_A_GOTO:
 380                 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
 381                 break;
 382         case TK_END:
 383                 dbg(rules->udev, "* %s\n", token_str(type));
 384                 break;
 385         case TK_M_PARENTS_MIN:
 386         case TK_M_PARENTS_MAX:
 387         case TK_M_MAX:
 388         case TK_UNSET:
 389                 dbg(rules->udev, "unknown type %u\n", type);
 390                 break;
 391         }
 392 }
 393
 394 static void dump_rules(struct udev_rules *rules)
 395 {
 396         unsigned int i;
 397
 398         dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
 399             rules->token_cur,
 400             rules->token_cur * sizeof(struct token),
 401             rules->buf_count,
 402             rules->buf_cur);
 403         for(i = 0; i < rules->token_cur; i++)
 404                 dump_token(rules, &rules->tokens[i]);
 405 }
 406 #else
 407 static inline const char *operation_str(enum operation_type type) { return NULL; }
 408 static inline const char *token_str(enum token_type type) { return NULL; }
 409 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
 410 static inline void dump_rules(struct udev_rules *rules) {}
 411 #endif /* DEBUG */
 412
 413 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
 414 {
 415         int off;
 416
 417         /* grow buffer if needed */
 418         if (rules->buf_cur + bytes+1 >= rules->buf_max) {
 419                 char *buf;
 420                 unsigned int add;
 421
 422                 /* double the buffer size */
 423                 add = rules->buf_max;
 424                 if (add < bytes * 8)
 425                         add = bytes * 8;
 426
 427                 buf = realloc(rules->buf, rules->buf_max + add);
 428                 if (buf == NULL)
 429                         return -1;
 430                 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
 431                 rules->buf = buf;
 432                 rules->buf_max += add;
 433         }
 434         off = rules->buf_cur;
 435         memcpy(&rules->buf[rules->buf_cur], str, bytes);
 436         rules->buf_cur += bytes;
 437         rules->buf_count++;
 438         return off;
 439 }
 440
 441 static unsigned char trie_child_slot(struct trie_node *node, char key)
 442 {
 443         unsigned char child_slot;
 444
 445         for (child_slot = 0; child_slot < node->child_cur; child_slot++) {
 446                 if (node->child_key[child_slot] == key)
 447                         break;
 448         }
 449
 450         return child_slot;
 451 }
 452
 453 static int add_string(struct udev_rules *rules, const char *str)
 454 {
 455         struct trie_node *child;
 456         unsigned short child_off;
 457         unsigned short node_off;
 458         unsigned char key;
 459         size_t len;
 460         unsigned int depth;
 461         unsigned int off;
 462
 463         len = strlen(str);
 464
 465         /* offset 0 is always '\0' */
 466         if (len == 0)
 467                 return 0;
 468
 469         /* strings with spaces are probably commands e.g. modprobe,
 470            with unique arguments. */
 471         if (strchr(str, ' ') != NULL)
 472                 return add_new_string(rules, str, len + 1);
 473
 474         /* descend root - start from last character of str */
 475         key = str[len - 1];
 476         node_off = rules->trie_root[key];
 477         depth = 0;
 478
 479         /* descend suffix trie */
 480         if (node_off != 0) {
 481                 while (1) {
 482                         struct trie_node *node = &rules->trie[node_off];
 483                         unsigned char child_slot;
 484
 485                         depth++;
 486                         off = node->value_off + node->value_len - len;
 487
 488                         /* match against current node */
 489                         if (depth == len ||
 490                             (node->value_len >= len &&
 491                             memcmp(&rules->buf[off], str, len) == 0))
 492                         {
 493                                 return off;
 494                         }
 495
 496                         /* lookup child node */
 497                         key = str[len - 1 - depth];
 498                         child_slot = trie_child_slot(node, key);
 499
 500                         if(child_slot == node->child_cur)
 501                                 break;
 502
 503                         node_off = node->child[child_slot];
 504                 }
 505         }
 506
 507         /* string not found, add it */
 508         off = add_new_string(rules, str, len + 1);
 509
 510         /* grow trie storage if needed */
 511         if (rules->trie_cur >= rules->trie_max) {
 512                 struct trie_node *trie;
 513                 unsigned short add;
 514
 515                 /* double the buffer size */
 516                 add = rules->trie_max;
 517                 if (add < 8)
 518                         add = 8;
 519
 520                 trie = realloc(rules->trie, (rules->trie_max + add) * sizeof(struct trie_node));
 521                 if (trie == NULL)
 522                         return -1;
 523                 dbg(rules->udev, "extend string index nodes from %u to %u\n", rules->trie_max, rules->trie_max + add);
 524                 rules->trie = trie;
 525                 rules->trie_max += add;
 526         }
 527
 528         /* insert new child node */
 529         child_off = rules->trie_cur;
 530         if (depth == 0) {
 531                 rules->trie_root[key] = child_off;
 532         } else {
 533                 struct trie_node *parent = &rules->trie[node_off];
 534                 unsigned char child_slot = parent->child_cur;
 535
 536                 /* no space in parent, we can't index this string, nevermind */
 537                 if (child_slot == TRIE_CHILD_MAX)
 538                         return off;
 539
 540                 parent->child[child_slot] = child_off;
 541                 parent->child_key[child_slot] = key;
 542                 parent->child_cur = child_slot + 1;
 543         }
 544
 545         /* allocate and construct the child node */
 546         rules->trie_cur++;
 547         child = &rules->trie[child_off];
 548         memset(child, 0x00, sizeof(struct trie_node));
 549         child->value_off = off;
 550         child->value_len = len;
 551
 552         return off;
 553 }
 554
 555 static int add_token(struct udev_rules *rules, struct token *token)
 556 {
 557         /* grow buffer if needed */
 558         if (rules->token_cur+1 >= rules->token_max) {
 559                 struct token *tokens;
 560                 unsigned int add;
 561
 562                 /* double the buffer size */
 563                 add = rules->token_max;
 564                 if (add < 8)
 565                         add = 8;
 566
 567                 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
 568                 if (tokens == NULL)
 569                         return -1;
 570                 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
 571                 rules->tokens = tokens;
 572                 rules->token_max += add;
 573         }
 574         memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
 575         rules->token_cur++;
 576         return 0;
 577 }
 578
 579 static uid_t add_uid(struct udev_rules *rules, const char *owner)
 580 {
 581         unsigned int i;
 582         uid_t uid;
 583         unsigned int off;
 584
 585         /* lookup, if we know it already */
 586         for (i = 0; i < rules->uids_cur; i++) {
 587                 off = rules->uids[i].name_off;
 588                 if (strcmp(&rules->buf[off], owner) == 0) {
 589                         uid = rules->uids[i].uid;
 590                         dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
 591                         return uid;
 592                 }
 593         }
 594         uid = util_lookup_user(rules->udev, owner);
 595
 596         /* grow buffer if needed */
 597         if (rules->uids_cur+1 >= rules->uids_max) {
 598                 struct uid_gid *uids;
 599                 unsigned int add;
 600
 601                 /* double the buffer size */
 602                 add = rules->uids_max;
 603                 if (add < 1)
 604                         add = 8;
 605
 606                 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
 607                 if (uids == NULL)
 608                         return uid;
 609                 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
 610                 rules->uids = uids;
 611                 rules->uids_max += add;
 612         }
 613         rules->uids[rules->uids_cur].uid = uid;
 614         off = add_string(rules, owner);
 615         if (off <= 0)
 616                 return uid;
 617         rules->uids[rules->uids_cur].name_off = off;
 618         rules->uids_cur++;
 619         return uid;
 620 }
 621
 622 static gid_t add_gid(struct udev_rules *rules, const char *group)
 623 {
 624         unsigned int i;
 625         gid_t gid;
 626         unsigned int off;
 627
 628         /* lookup, if we know it already */
 629         for (i = 0; i < rules->gids_cur; i++) {
 630                 off = rules->gids[i].name_off;
 631                 if (strcmp(&rules->buf[off], group) == 0) {
 632                         gid = rules->gids[i].gid;
 633                         dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
 634                         return gid;
 635                 }
 636         }
 637         gid = util_lookup_group(rules->udev, group);
 638
 639         /* grow buffer if needed */
 640         if (rules->gids_cur+1 >= rules->gids_max) {
 641                 struct uid_gid *gids;
 642                 unsigned int add;
 643
 644                 /* double the buffer size */
 645                 add = rules->gids_max;
 646                 if (add < 1)
 647                         add = 8;
 648
 649                 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
 650                 if (gids == NULL)
 651                         return gid;
 652                 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
 653                 rules->gids = gids;
 654                 rules->gids_max += add;
 655         }
 656         rules->gids[rules->gids_cur].gid = gid;
 657         off = add_string(rules, group);
 658         if (off <= 0)
 659                 return gid;
 660         rules->gids[rules->gids_cur].name_off = off;
 661         rules->gids_cur++;
 662         return gid;
 663 }
 664
 665 static int import_property_from_string(struct udev_device *dev, char *line)
 666 {
 667         struct udev *udev = udev_device_get_udev(dev);
 668         char *key;
 669         char *val;
 670         size_t len;
 671
 672         /* find key */
 673         key = line;
 674         while (isspace(key[0]))
 675                 key++;
 676
 677         /* comment or empty line */
 678         if (key[0] == '#' || key[0] == '\0')
 679                 return -1;
 680
 681         /* split key/value */
 682         val = strchr(key, '=');
 683         if (val == NULL)
 684                 return -1;
 685         val[0] = '\0';
 686         val++;
 687
 688         /* find value */
 689         while (isspace(val[0]))
 690                 val++;
 691
 692         /* terminate key */
 693         len = strlen(key);
 694         if (len == 0)
 695                 return -1;
 696         while (isspace(key[len-1]))
 697                 len--;
 698         key[len] = '\0';
 699
 700         /* terminate value */
 701         len = strlen(val);
 702         if (len == 0)
 703                 return -1;
 704         while (isspace(val[len-1]))
 705                 len--;
 706         val[len] = '\0';
 707
 708         if (len == 0)
 709                 return -1;
 710
 711         /* unquote */
 712         if (val[0] == '"' || val[0] == '\'') {
 713                 if (val[len-1] != val[0]) {
 714                         info(udev, "inconsistent quoting: '%s', skip\n", line);
 715                         return -1;
 716                 }
 717                 val[len-1] = '\0';
 718                 val++;
 719         }
 720
 721         dbg(udev, "adding '%s'='%s'\n", key, val);
 722
 723         /* handle device, renamed by external tool, returning new path */
 724         if (strcmp(key, "DEVPATH") == 0) {
 725                 char syspath[UTIL_PATH_SIZE];
 726
 727                 info(udev, "updating devpath from '%s' to '%s'\n",
 728                      udev_device_get_devpath(dev), val);
 729                 util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
 730                 util_strlcat(syspath, val, sizeof(syspath));
 731                 udev_device_set_syspath(dev, syspath);
 732         } else {
 733                 struct udev_list_entry *entry;
 734
 735                 entry = udev_device_add_property(dev, key, val);
 736                 /* store in db */
 737                 udev_list_entry_set_flag(entry, 1);
 738         }
 739         return 0;
 740 }
 741
 742 static int import_file_into_properties(struct udev_device *dev, const char *filename)
 743 {
 744         FILE *f;
 745         char line[UTIL_LINE_SIZE];
 746
 747         f = fopen(filename, "r");
 748         if (f == NULL)
 749                 return -1;
 750         while (fgets(line, sizeof(line), f) != NULL)
 751                 import_property_from_string(dev, line);
 752         fclose(f);
 753         return 0;
 754 }
 755
 756 static int import_program_into_properties(struct udev_device *dev, const char *program)
 757 {
 758         struct udev *udev = udev_device_get_udev(dev);
 759         char **envp;
 760         char result[2048];
 761         size_t reslen;
 762         char *line;
 763
 764         envp = udev_device_get_properties_envp(dev);
 765         if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
 766                 return -1;
 767
 768         line = result;
 769         while (line != NULL) {
 770                 char *pos;
 771
 772                 pos = strchr(line, '\n');
 773                 if (pos != NULL) {
 774                         pos[0] = '\0';
 775                         pos = &pos[1];
 776                 }
 777                 import_property_from_string(dev, line);
 778                 line = pos;
 779         }
 780         return 0;
 781 }
 782
 783 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
 784 {
 785         struct udev *udev = udev_device_get_udev(dev);
 786         struct udev_device *dev_parent;
 787         struct udev_list_entry *list_entry;
 788
 789         dev_parent = udev_device_get_parent(dev);
 790         if (dev_parent == NULL)
 791                 return -1;
 792
 793         dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
 794         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
 795                 const char *key = udev_list_entry_get_name(list_entry);
 796                 const char *val = udev_list_entry_get_value(list_entry);
 797
 798                 if (fnmatch(filter, key, 0) == 0) {
 799                         struct udev_list_entry *entry;
 800
 801                         dbg(udev, "import key '%s=%s'\n", key, val);
 802                         entry = udev_device_add_property(dev, key, val);
 803                         /* store in db */
 804                         udev_list_entry_set_flag(entry, 1);
 805                 }
 806         }
 807         return 0;
 808 }
 809
 810 #define WAIT_LOOP_PER_SECOND            50
 811 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
 812 {
 813         struct udev *udev = udev_device_get_udev(dev);
 814         char filepath[UTIL_PATH_SIZE];
 815         char devicepath[UTIL_PATH_SIZE];
 816         struct stat stats;
 817         int loop = timeout * WAIT_LOOP_PER_SECOND;
 818
 819         /* a relative path is a device attribute */
 820         devicepath[0] = '\0';
 821         if (file[0] != '/') {
 822                 util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath));
 823                 util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath));
 824
 825                 util_strlcpy(filepath, devicepath, sizeof(filepath));
 826                 util_strlcat(filepath, "/", sizeof(filepath));
 827                 util_strlcat(filepath, file, sizeof(filepath));
 828                 file = filepath;
 829         }
 830
 831         dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
 832         while (--loop) {
 833                 /* lookup file */
 834                 if (stat(file, &stats) == 0) {
 835                         info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
 836                         return 0;
 837                 }
 838                 /* make sure, the device did not disappear in the meantime */
 839                 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
 840                         info(udev, "device disappeared while waiting for '%s'\n", file);
 841                         return -2;
 842                 }
 843                 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
 844                 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
 845         }
 846         info(udev, "waiting for '%s' failed\n", file);
 847         return -1;
 848 }
 849
 850 static int attr_subst_subdir(char *attr, size_t len)
 851 {
 852         char *pos;
 853         int found = 0;
 854
 855         pos = strstr(attr, "/*/");
 856         if (pos != NULL) {
 857                 char str[UTIL_PATH_SIZE];
 858                 DIR *dir;
 859
 860                 pos[1] = '\0';
 861                 util_strlcpy(str, &pos[2], sizeof(str));
 862                 dir = opendir(attr);
 863                 if (dir != NULL) {
 864                         struct dirent *dent;
 865
 866                         for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 867                                 struct stat stats;
 868
 869                                 if (dent->d_name[0] == '.')
 870                                         continue;
 871                                 util_strlcat(attr, dent->d_name, len);
 872                                 util_strlcat(attr, str, len);
 873                                 if (stat(attr, &stats) == 0) {
 874                                         found = 1;
 875                                         break;
 876                                 }
 877                                 pos[1] = '\0';
 878                         }
 879                         closedir(dir);
 880                 }
 881                 if (!found)
 882                         util_strlcat(attr, str, len);
 883         }
 884
 885         return found;
 886 }
 887
 888 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
 889 {
 890         char *linepos;
 891         char *temp;
 892
 893         linepos = *line;
 894         if (linepos == NULL && linepos[0] == '\0')
 895                 return -1;
 896
 897         /* skip whitespace */
 898         while (isspace(linepos[0]) || linepos[0] == ',')
 899                 linepos++;
 900
 901         /* get the key */
 902         if (linepos[0] == '\0')
 903                 return -1;
 904         *key = linepos;
 905
 906         while (1) {
 907                 linepos++;
 908                 if (linepos[0] == '\0')
 909                         return -1;
 910                 if (isspace(linepos[0]))
 911                         break;
 912                 if (linepos[0] == '=')
 913                         break;
 914                 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
 915                         if (linepos[1] == '=')
 916                                 break;
 917         }
 918
 919         /* remember end of key */
 920         temp = linepos;
 921
 922         /* skip whitespace after key */
 923         while (isspace(linepos[0]))
 924                 linepos++;
 925         if (linepos[0] == '\0')
 926                 return -1;
 927
 928         /* get operation type */
 929         if (linepos[0] == '=' && linepos[1] == '=') {
 930                 *op = OP_MATCH;
 931                 linepos += 2;
 932         } else if (linepos[0] == '!' && linepos[1] == '=') {
 933                 *op = OP_NOMATCH;
 934                 linepos += 2;
 935         } else if (linepos[0] == '+' && linepos[1] == '=') {
 936                 *op = OP_ADD;
 937                 linepos += 2;
 938         } else if (linepos[0] == '=') {
 939                 *op = OP_ASSIGN;
 940                 linepos++;
 941         } else if (linepos[0] == ':' && linepos[1] == '=') {
 942                 *op = OP_ASSIGN_FINAL;
 943                 linepos += 2;
 944         } else
 945                 return -1;
 946
 947         /* terminate key */
 948         temp[0] = '\0';
 949
 950         /* skip whitespace after operator */
 951         while (isspace(linepos[0]))
 952                 linepos++;
 953         if (linepos[0] == '\0')
 954                 return -1;
 955
 956         /* get the value */
 957         if (linepos[0] == '"')
 958                 linepos++;
 959         else
 960                 return -1;
 961         *value = linepos;
 962
 963         /* terminate */
 964         temp = strchr(linepos, '"');
 965         if (!temp)
 966                 return -1;
 967         temp[0] = '\0';
 968         temp++;
 969         dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
 970
 971         /* move line to next key */
 972         *line = temp;
 973         return 0;
 974 }
 975
 976 /* extract possible KEY{attr} */
 977 static char *get_key_attribute(struct udev *udev, char *str)
 978 {
 979         char *pos;
 980         char *attr;
 981
 982         attr = strchr(str, '{');
 983         if (attr != NULL) {
 984                 attr++;
 985                 pos = strchr(attr, '}');
 986                 if (pos == NULL) {
 987                         err(udev, "missing closing brace for format\n");
 988                         return NULL;
 989                 }
 990                 pos[0] = '\0';
 991                 dbg(udev, "attribute='%s'\n", attr);
 992                 return attr;
 993         }
 994         return NULL;
 995 }
 996
 997 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
 998                         enum operation_type op,
 999                         const char *value, const void *data)
1000 {
1001         struct token *token = &rule_tmp->token[rule_tmp->token_cur];
1002         const char *attr = data;
1003         enum string_glob_type glob;
1004
1005         memset(token, 0x00, sizeof(struct token));
1006
1007         switch (type) {
1008         case TK_M_ACTION:
1009         case TK_M_DEVPATH:
1010         case TK_M_KERNEL:
1011         case TK_M_SUBSYSTEM:
1012         case TK_M_DRIVER:
1013         case TK_M_WAITFOR:
1014         case TK_M_DEVLINK:
1015         case TK_M_NAME:
1016         case TK_M_KERNELS:
1017         case TK_M_SUBSYSTEMS:
1018         case TK_M_DRIVERS:
1019         case TK_M_PROGRAM:
1020         case TK_M_IMPORT_FILE:
1021         case TK_M_IMPORT_PROG:
1022         case TK_M_IMPORT_PARENT:
1023         case TK_M_RESULT:
1024         case TK_A_OWNER:
1025         case TK_A_GROUP:
1026         case TK_A_MODE:
1027         case TK_A_NAME:
1028         case TK_A_DEVLINK:
1029         case TK_A_GOTO:
1030                 token->key.value_off = add_string(rule_tmp->rules, value);
1031                 break;
1032         case TK_M_ENV:
1033         case TK_M_ATTR:
1034         case TK_M_ATTRS:
1035         case TK_A_ATTR:
1036         case TK_A_ENV:
1037                 token->key.value_off = add_string(rule_tmp->rules, value);
1038                 token->key.attr_off = add_string(rule_tmp->rules, attr);
1039                 break;
1040         case TK_M_TEST:
1041                 token->key.value_off = add_string(rule_tmp->rules, value);
1042                 if (data != NULL)
1043                         token->key.mode = *(mode_t *)data;
1044                 break;
1045         case TK_A_IGNORE_DEVICE:
1046         case TK_A_STRING_ESCAPE_NONE:
1047         case TK_A_STRING_ESCAPE_REPLACE:
1048         case TK_A_IGNORE_REMOVE:
1049         case TK_A_LAST_RULE:
1050                 break;
1051         case TK_A_RUN:
1052                 token->key.value_off = add_string(rule_tmp->rules, value);
1053                 token->key.ignore_error = *(int *)data;
1054                 break;
1055         case TK_A_NUM_FAKE_PART:
1056                 token->key.num_fake_part = *(int *)data;
1057                 break;
1058         case TK_A_DEVLINK_PRIO:
1059                 token->key.devlink_prio = *(int *)data;
1060                 break;
1061         case TK_A_OWNER_ID:
1062                 token->key.uid = *(uid_t *)data;
1063                 break;
1064         case TK_A_GROUP_ID:
1065                 token->key.gid = *(gid_t *)data;
1066                 break;
1067         case TK_A_MODE_ID:
1068                 token->key.mode = *(mode_t *)data;
1069                 break;
1070         case TK_A_EVENT_TIMEOUT:
1071                 token->key.event_timeout = *(int *)data;
1072                 break;
1073         case TK_RULE:
1074         case TK_M_PARENTS_MIN:
1075         case TK_M_PARENTS_MAX:
1076         case TK_M_MAX:
1077         case TK_END:
1078         case TK_UNSET:
1079                 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1080                 return -1;
1081         }
1082
1083         glob = GL_PLAIN;
1084         if (value != NULL) {
1085                 if (type < TK_M_MAX) {
1086                         /* check if we need to split or call fnmatch() while matching rules */
1087                         int has_split;
1088                         int has_glob;
1089
1090                         has_split = (strchr(value, '|') != NULL);
1091                         has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||
1092                                     strchr(value, '[') != NULL || strchr(value, ']') != NULL);
1093                         if (has_split && has_glob) {
1094                                 glob = GL_SPLIT_GLOB;
1095                         } else if (has_split) {
1096                                 glob = GL_SPLIT;
1097                         } else if (has_glob) {
1098                                 if (strcmp(value, "?*") == 0)
1099                                         glob = GL_SOMETHING;
1100                                 else
1101                                         glob = GL_GLOB;
1102                         }
1103                 } else {
1104                         /* check if we need to substitute format strings for matching rules */
1105                         if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1106                                 glob = GL_FORMAT;
1107                 }
1108         }
1109
1110         token->key.type = type;
1111         token->key.op = op;
1112         token->key.glob = glob;
1113         rule_tmp->token_cur++;
1114         if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1115                 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1116                 return -1;
1117         }
1118         return 0;
1119 }
1120
1121 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1122 {
1123         unsigned int i;
1124         unsigned int start = 0;
1125         unsigned int end = rule_tmp->token_cur;
1126
1127         for (i = 0; i < rule_tmp->token_cur; i++) {
1128                 enum token_type next_val = TK_UNSET;
1129                 unsigned int next_idx;
1130                 unsigned int j;
1131
1132                 /* find smallest value */
1133                 for (j = start; j < end; j++) {
1134                         if (rule_tmp->token[j].type == TK_UNSET)
1135                                 continue;
1136                         if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1137                                 next_val = rule_tmp->token[j].type;
1138                                 next_idx = j;
1139                         }
1140                 }
1141
1142                 /* add token and mark done */
1143                 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1144                         return -1;
1145                 rule_tmp->token[next_idx].type = TK_UNSET;
1146
1147                 /* shrink range */
1148                 if (next_idx == start)
1149                         start++;
1150                 if (next_idx+1 == end)
1151                         end--;
1152         }
1153         return 0;
1154 }
1155
1156 static int add_rule(struct udev_rules *rules, char *line,
1157                     const char *filename, unsigned int filename_off, unsigned int lineno)
1158 {
1159         int valid = 0;
1160         char *linepos;
1161         char *attr;
1162         int physdev = 0;
1163         struct rule_tmp rule_tmp;
1164
1165         memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1166         rule_tmp.rules = rules;
1167         rule_tmp.rule.type = TK_RULE;
1168         rule_tmp.rule.rule.filename_off = filename_off;
1169         rule_tmp.rule.rule.filename_line = lineno;
1170
1171         linepos = line;
1172         while (1) {
1173                 char *key;
1174                 char *value;
1175                 enum operation_type op;
1176
1177                 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1178                         break;
1179
1180                 if (strcasecmp(key, "ACTION") == 0) {
1181                         if (op > OP_MATCH_MAX) {
1182                                 err(rules->udev, "invalid ACTION operation\n");
1183                                 goto invalid;
1184                         }
1185                         rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1186                         valid = 1;
1187                         continue;
1188                 }
1189
1190                 if (strcasecmp(key, "DEVPATH") == 0) {
1191                         if (op > OP_MATCH_MAX) {
1192                                 err(rules->udev, "invalid DEVPATH operation\n");
1193                                 goto invalid;
1194                         }
1195                         rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1196                         valid = 1;
1197                         continue;
1198                 }
1199
1200                 if (strcasecmp(key, "KERNEL") == 0) {
1201                         if (op > OP_MATCH_MAX) {
1202                                 err(rules->udev, "invalid KERNEL operation\n");
1203                                 goto invalid;
1204                         }
1205                         rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1206                         valid = 1;
1207                         continue;
1208                 }
1209
1210                 if (strcasecmp(key, "SUBSYSTEM") == 0) {
1211                         if (op > OP_MATCH_MAX) {
1212                                 err(rules->udev, "invalid SUBSYSTEM operation\n");
1213                                 goto invalid;
1214                         }
1215                         /* bus, class, subsystem events should all be the same */
1216                         if (strcmp(value, "subsystem") == 0 ||
1217                             strcmp(value, "bus") == 0 ||
1218                             strcmp(value, "class") == 0) {
1219                                 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1220                                         err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1221                                             "please fix it in %s:%u", value, filename, lineno);
1222                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1223                         } else
1224                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1225                         valid = 1;
1226                         continue;
1227                 }
1228
1229                 if (strcasecmp(key, "DRIVER") == 0) {
1230                         if (op > OP_MATCH_MAX) {
1231                                 err(rules->udev, "invalid DRIVER operation\n");
1232                                 goto invalid;
1233                         }
1234                         rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1235                         valid = 1;
1236                         continue;
1237                 }
1238
1239                 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1240                         attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1241                         if (attr == NULL) {
1242                                 err(rules->udev, "error parsing ATTR attribute\n");
1243                                 goto invalid;
1244                         }
1245                         if (op < OP_MATCH_MAX) {
1246                                 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1247                         } else {
1248                                 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1249                         }
1250                         valid = 1;
1251                         continue;
1252                 }
1253
1254                 if (strcasecmp(key, "KERNELS") == 0 ||
1255                     strcasecmp(key, "ID") == 0) {
1256                         if (op > OP_MATCH_MAX) {
1257                                 err(rules->udev, "invalid KERNELS operation\n");
1258                                 goto invalid;
1259                         }
1260                         rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1261                         valid = 1;
1262                         continue;
1263                 }
1264
1265                 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
1266                     strcasecmp(key, "BUS") == 0) {
1267                         if (op > OP_MATCH_MAX) {
1268                                 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1269                                 goto invalid;
1270                         }
1271                         rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1272                         valid = 1;
1273                         continue;
1274                 }
1275
1276                 if (strcasecmp(key, "DRIVERS") == 0) {
1277                         if (op > OP_MATCH_MAX) {
1278                                 err(rules->udev, "invalid DRIVERS operation\n");
1279                                 goto invalid;
1280                         }
1281                         rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1282                         valid = 1;
1283                         continue;
1284                 }
1285
1286                 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1287                     strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1288                         if (op > OP_MATCH_MAX) {
1289                                 err(rules->udev, "invalid ATTRS operation\n");
1290                                 goto invalid;
1291                         }
1292                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1293                         if (attr == NULL) {
1294                                 err(rules->udev, "error parsing ATTRS attribute\n");
1295                                 goto invalid;
1296                         }
1297                         if (strncmp(attr, "device/", 7) == 0)
1298                                 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1299                                     "please fix it in %s:%u", filename, lineno);
1300                         else if (strstr(attr, "../") != NULL)
1301                                 err(rules->udev, "do not reference parent sysfs directories directly, "
1302                                     "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1303                         rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1304                         valid = 1;
1305                         continue;
1306                 }
1307
1308                 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1309                         attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1310                         if (attr == NULL) {
1311                                 err(rules->udev, "error parsing ENV attribute\n");
1312                                 goto invalid;
1313                         }
1314                         if (strncmp(attr, "PHYSDEV", 7) == 0)
1315                                 physdev = 1;
1316                         if (op < OP_MATCH_MAX) {
1317                                 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1318                                         goto invalid;
1319                         } else {
1320                                 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1321                                         goto invalid;
1322                         }
1323                         valid = 1;
1324                         continue;
1325                 }
1326
1327                 if (strcasecmp(key, "PROGRAM") == 0) {
1328                         rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1329                         valid = 1;
1330                         continue;
1331                 }
1332
1333                 if (strcasecmp(key, "RESULT") == 0) {
1334                         if (op > OP_MATCH_MAX) {
1335                                 err(rules->udev, "invalid RESULT operation\n");
1336                                 goto invalid;
1337                         }
1338                         rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1339                         valid = 1;
1340                         continue;
1341                 }
1342
1343                 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1344                         attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1345                         if (attr != NULL && strstr(attr, "program")) {
1346                                 dbg(rules->udev, "IMPORT will be executed\n");
1347                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1348                                 valid = 1;
1349                         } else if (attr != NULL && strstr(attr, "file")) {
1350                                 dbg(rules->udev, "IMPORT will be included as file\n");
1351                                 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1352                                 valid = 1;
1353                         } else if (attr != NULL && strstr(attr, "parent")) {
1354                                 dbg(rules->udev, "IMPORT will include the parent values\n");
1355                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1356                                 valid = 1;
1357                         } else {
1358                                 /* figure it out if it is executable */
1359                                 char file[UTIL_PATH_SIZE];
1360                                 char *pos;
1361                                 struct stat statbuf;
1362
1363                                 util_strlcpy(file, value, sizeof(file));
1364                                 pos = strchr(file, ' ');
1365                                 if (pos)
1366                                         pos[0] = '\0';
1367
1368                                 /* allow programs in /lib/udev called without the path */
1369                                 if (strchr(file, '/') == NULL) {
1370                                         util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));
1371                                         util_strlcat(file, value, sizeof(file));
1372                                         pos = strchr(file, ' ');
1373                                         if (pos)
1374                                                 pos[0] = '\0';
1375                                 }
1376
1377                                 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1378                                 if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
1379                                         dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1380                                         rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1381                                         valid = 1;
1382                                 } else {
1383                                         dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1384                                         rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1385                                         valid = 1;
1386                                 }
1387                         }
1388                         continue;
1389                 }
1390
1391                 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1392                         mode_t mode = 0;
1393
1394                         if (op > OP_MATCH_MAX) {
1395                                 err(rules->udev, "invalid TEST operation\n");
1396                                 goto invalid;
1397                         }
1398                         attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1399                         if (attr != NULL) {
1400                                 mode = strtol(attr, NULL, 8);
1401                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1402                         } else {
1403                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1404                         }
1405                         valid = 1;
1406                         continue;
1407                 }
1408
1409                 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1410                         int flag = 0;
1411
1412                         attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1413                         if (attr != NULL && strstr(attr, "ignore_error"))
1414                                 flag = 1;
1415                         rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1416                         valid = 1;
1417                         continue;
1418                 }
1419
1420                 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1421                         rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1422                         valid = 1;
1423                         continue;
1424                 }
1425
1426                 if (strcasecmp(key, "LABEL") == 0) {
1427                         rule_tmp.rule.rule.label_off = add_string(rules, value);
1428                         valid = 1;
1429                         continue;
1430                 }
1431
1432                 if (strcasecmp(key, "GOTO") == 0) {
1433                         rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1434                         valid = 1;
1435                         continue;
1436                 }
1437
1438                 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1439                         if (op < OP_MATCH_MAX) {
1440                                 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1441                         } else {
1442                                 if (value[0] == '\0')
1443                                         dbg(rules->udev, "name empty, node creation suppressed\n");
1444                                 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1445                                 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1446                                 if (attr != NULL) {
1447                                         if (strstr(attr, "all_partitions") != NULL) {
1448                                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1449
1450                                                 dbg(rules->udev, "creation of partition nodes requested\n");
1451                                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1452                                         }
1453                                         if (strstr(attr, "ignore_remove") != NULL) {
1454                                                 dbg(rules->udev, "remove event should be ignored\n");
1455                                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1456                                         }
1457                                 }
1458                         }
1459                         rule_tmp.rule.rule.flags = 1;
1460                         continue;
1461                 }
1462
1463                 if (strcasecmp(key, "SYMLINK") == 0) {
1464                         if (op < OP_MATCH_MAX)
1465                                 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1466                         else
1467                                 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1468                         rule_tmp.rule.rule.flags = 1;
1469                         valid = 1;
1470                         continue;
1471                 }
1472
1473                 if (strcasecmp(key, "OWNER") == 0) {
1474                         uid_t uid;
1475                         char *endptr;
1476
1477                         uid = strtoul(value, &endptr, 10);
1478                         if (endptr[0] == '\0') {
1479                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1480                         } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1481                                 uid = add_uid(rules, value);
1482                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1483                         } else {
1484                                 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1485                         }
1486                         rule_tmp.rule.rule.flags = 1;
1487                         valid = 1;
1488                         continue;
1489                 }
1490
1491                 if (strcasecmp(key, "GROUP") == 0) {
1492                         gid_t gid;
1493                         char *endptr;
1494
1495                         gid = strtoul(value, &endptr, 10);
1496                         if (endptr[0] == '\0') {
1497                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1498                         } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1499                                 gid = add_gid(rules, value);
1500                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1501                         } else {
1502                                 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1503                         }
1504                         rule_tmp.rule.rule.flags = 1;
1505                         valid = 1;
1506                         continue;
1507                 }
1508
1509                 if (strcasecmp(key, "MODE") == 0) {
1510                         mode_t mode;
1511                         char *endptr;
1512
1513                         mode = strtol(value, &endptr, 8);
1514                         if (endptr[0] == '\0')
1515                                 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1516                         else
1517                                 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1518                         rule_tmp.rule.rule.flags = 1;
1519                         valid = 1;
1520                         continue;
1521                 }
1522
1523                 if (strcasecmp(key, "OPTIONS") == 0) {
1524                         const char *pos;
1525
1526                         if (strstr(value, "last_rule") != NULL) {
1527                                 dbg(rules->udev, "last rule to be applied\n");
1528                                 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1529                         }
1530                         if (strstr(value, "ignore_device") != NULL) {
1531                                 dbg(rules->udev, "device should be ignored\n");
1532                                 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1533                         }
1534                         if (strstr(value, "ignore_remove") != NULL) {
1535                                 dbg(rules->udev, "remove event should be ignored\n");
1536                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1537                         }
1538                         pos = strstr(value, "link_priority=");
1539                         if (pos != NULL) {
1540                                 int prio = atoi(&pos[strlen("link_priority=")]);
1541
1542                                 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1543                                 dbg(rules->udev, "link priority=%i\n", prio);
1544                         }
1545                         pos = strstr(value, "event_timeout=");
1546                         if (pos != NULL) {
1547                                 int tout = atoi(&pos[strlen("event_timeout=")]);
1548
1549                                 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1550                                 dbg(rules->udev, "event timout=%i\n", tout);
1551                         }
1552                         pos = strstr(value, "string_escape=");
1553                         if (pos != NULL) {
1554                                 pos = &pos[strlen("string_escape=")];
1555                                 if (strncmp(pos, "none", strlen("none")) == 0)
1556                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1557                                 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1558                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1559                         }
1560                         if (strstr(value, "all_partitions") != NULL) {
1561                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1562
1563                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1564                                 dbg(rules->udev, "creation of partition nodes requested\n");
1565                         }
1566                         valid = 1;
1567                         continue;
1568                 }
1569                 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1570         }
1571
1572         if (physdev)
1573                 err(rules->udev, "PHYSDEV* values are deprecated and not available on recent kernels, \n"
1574                     "please fix it in %s:%u", filename, lineno);
1575
1576         /* skip line if not any valid key was found */
1577         if (!valid)
1578                 goto invalid;
1579
1580         /* add rule token */
1581         rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1582         if (add_token(rules, &rule_tmp.rule) != 0)
1583                 goto invalid;
1584
1585         /* add tokens to list, sorted by type */
1586         if (sort_token(rules, &rule_tmp) != 0)
1587                 goto invalid;
1588
1589         return 0;
1590 invalid:
1591         err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1592         return -1;
1593 }
1594
1595 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1596 {
1597         FILE *f;
1598         unsigned int first_token;
1599         char line[UTIL_LINE_SIZE];
1600         int line_nr = 0;
1601         unsigned int i;
1602
1603         info(rules->udev, "reading '%s' as rules file\n", filename);
1604
1605         f = fopen(filename, "r");
1606         if (f == NULL)
1607                 return -1;
1608
1609         first_token = rules->token_cur;
1610
1611         while(fgets(line, sizeof(line), f) != NULL) {
1612                 char *key;
1613                 size_t len;
1614
1615                 /* skip whitespace */
1616                 line_nr++;
1617                 key = line;
1618                 while (isspace(key[0]))
1619                         key++;
1620
1621                 /* comment */
1622                 if (key[0] == '#')
1623                         continue;
1624
1625                 len = strlen(line);
1626                 if (len < 3)
1627                         continue;
1628
1629                 /* continue reading if backslash+newline is found */
1630                 while (line[len-2] == '\\') {
1631                         if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1632                                 break;
1633                         line_nr++;
1634                         len = strlen(line);
1635                 }
1636
1637                 if (len+1 >= sizeof(line)) {
1638                         err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1639                         continue;
1640                 }
1641                 add_rule(rules, key, filename, filename_off, line_nr);
1642         }
1643         fclose(f);
1644
1645         /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1646         for (i = first_token+1; i < rules->token_cur; i++) {
1647                 if (rules->tokens[i].type == TK_A_GOTO) {
1648                         char *label = &rules->buf[rules->tokens[i].key.value_off];
1649                         unsigned int j;
1650
1651                         for (j = i+1; j < rules->token_cur; j++) {
1652                                 if (rules->tokens[j].type != TK_RULE)
1653                                         continue;
1654                                 if (rules->tokens[j].rule.label_off == 0)
1655                                         continue;
1656                                 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1657                                         continue;
1658                                 rules->tokens[i].key.rule_goto = j;
1659                         }
1660                         if (rules->tokens[i].key.rule_goto == 0)
1661                                 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1662                 }
1663         }
1664         return 0;
1665 }
1666
1667 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1668 {
1669         DIR *dir;
1670         char filename[UTIL_PATH_SIZE];
1671
1672         dbg(udev, "open directory '%s'\n", dirname);
1673         dir = opendir(dirname);
1674         if (dir == NULL) {
1675                 err(udev, "unable to open '%s': %m\n", dirname);
1676                 return -1;
1677         }
1678
1679         while (1) {
1680                 struct dirent *dent;
1681
1682                 dent = readdir(dir);
1683                 if (dent == NULL || dent->d_name[0] == '\0')
1684                         break;
1685
1686                 if (dent->d_name[0] == '.')
1687                         continue;
1688
1689                 /* look for file matching with specified suffix */
1690                 if (suffix != NULL) {
1691                         const char *ext;
1692
1693                         ext = strrchr(dent->d_name, '.');
1694                         if (ext == NULL)
1695                                 continue;
1696                         if (strcmp(ext, suffix) != 0)
1697                                 continue;
1698                 }
1699                 dbg(udev, "put file '%s/%s' into list\n", dirname, dent->d_name);
1700
1701                 snprintf(filename, sizeof(filename), "%s/%s", dirname, dent->d_name);
1702                 filename[sizeof(filename)-1] = '\0';
1703                 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1704         }
1705
1706         closedir(dir);
1707         return 0;
1708 }
1709
1710 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1711 {
1712         struct udev_rules *rules;
1713         struct stat statbuf;
1714         struct udev_list_node file_list;
1715         struct udev_list_entry *file_loop, *file_tmp;
1716         struct token end_token;
1717
1718         rules = malloc(sizeof(struct udev_rules));
1719         if (rules == NULL)
1720                 return NULL;
1721         memset(rules, 0x00, sizeof(struct udev_rules));
1722         rules->udev = udev;
1723         rules->resolve_names = resolve_names;
1724         udev_list_init(&file_list);
1725
1726         /* init token array and string buffer */
1727         rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1728         if (rules->tokens == NULL)
1729                 return NULL;
1730         rules->token_max = PREALLOC_TOKEN;
1731         rules->buf = malloc(PREALLOC_STRBUF);
1732         if (rules->buf == NULL)
1733                 return NULL;
1734         rules->buf_max = PREALLOC_STRBUF;
1735         rules->trie = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1736         if (rules->trie == NULL)
1737                 return NULL;
1738         rules->trie_max = PREALLOC_TRIE;
1739         rules->trie_root = calloc(UCHAR_MAX + 1, sizeof(unsigned short));
1740         /* offset 0 is always '\0' */
1741         rules->buf[0] = '\0';
1742         rules->buf_cur = 1;
1743         /* offset 0 is reserved for the null trie node */
1744         rules->trie_cur = 1;
1745         dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1746             rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1747
1748         if (udev_get_rules_path(udev) != NULL) {
1749                 /* custom rules location for testing */
1750                 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1751         } else {
1752                 char filename[PATH_MAX];
1753                 struct udev_list_node sort_list;
1754                 struct udev_list_entry *sort_loop, *sort_tmp;
1755
1756                 /* read user/custom rules */
1757                 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1758
1759                 /* read dynamic/temporary rules */
1760                 util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
1761                 util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
1762                 if (stat(filename, &statbuf) != 0) {
1763                         util_create_path(udev, filename);
1764                         udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1765                         mkdir(filename, 0755);
1766                         udev_selinux_resetfscreatecon(udev);
1767                 }
1768                 udev_list_init(&sort_list);
1769                 add_matching_files(udev, &sort_list, filename, ".rules");
1770
1771                 /* read default rules */
1772                 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1773
1774                 /* sort all rules files by basename into list of files */
1775                 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1776                         const char *sort_name = udev_list_entry_get_name(sort_loop);
1777                         const char *sort_base = strrchr(sort_name, '/');
1778
1779                         if (sort_base == NULL)
1780                                 continue;
1781                         /* sort entry into existing list */
1782                         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1783                                 const char *file_name = udev_list_entry_get_name(file_loop);
1784                                 const char *file_base = strrchr(file_name, '/');
1785
1786                                 if (file_base == NULL)
1787                                         continue;
1788                                 if (strcmp(file_base, sort_base) == 0) {
1789                                         info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1790                                              file_name, sort_name);
1791                                         udev_list_entry_delete(sort_loop);
1792                                         sort_loop = NULL;
1793                                         break;
1794                                 }
1795                                 if (strcmp(file_base, sort_base) > 0) {
1796                                         /* found later file, insert before */
1797                                         udev_list_entry_remove(sort_loop);
1798                                         udev_list_entry_insert_before(sort_loop, file_loop);
1799                                         sort_loop = NULL;
1800                                         break;
1801                                 }
1802                         }
1803                         /* current file already handled */
1804                         if (sort_loop == NULL)
1805                                 continue;
1806                         /* no later file, append to end of list */
1807                         udev_list_entry_remove(sort_loop);
1808                         udev_list_entry_append(sort_loop, &file_list);
1809                 }
1810         }
1811
1812         /* add all filenames to the string buffer */
1813         udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1814                 const char *filename = udev_list_entry_get_name(file_loop);
1815                 unsigned int filename_off;
1816
1817                 filename_off = add_string(rules, filename);
1818                 /* the offset in the rule is limited to unsigned short */
1819                 if (filename_off < USHRT_MAX)
1820                         udev_list_entry_set_flag(file_loop, filename_off);
1821         }
1822
1823         /* parse list of files */
1824         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1825                 const char *filename = udev_list_entry_get_name(file_loop);
1826                 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1827
1828                 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1829                         parse_file(rules, filename, filename_off);
1830                 else
1831                         info(udev, "can not read '%s'\n", filename);
1832                 udev_list_entry_delete(file_loop);
1833         }
1834
1835         memset(&end_token, 0x00, sizeof(struct token));
1836         end_token.type = TK_END;
1837         add_token(rules, &end_token);
1838
1839         /* shrink allocated token and string buffer */
1840         if (rules->token_cur < rules->token_max) {
1841                 struct token *tokens;
1842
1843                 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1844                 if (tokens != NULL || rules->token_cur == 0) {
1845                         rules->tokens = tokens;
1846                         rules->token_max = rules->token_cur;
1847                 }
1848         }
1849         if (rules->buf_cur < rules->buf_max) {
1850                 char *buf;
1851
1852                 buf = realloc(rules->buf, rules->buf_cur);
1853                 if (buf != NULL || rules->buf_cur == 0) {
1854                         rules->buf = buf;
1855                         rules->buf_max = rules->buf_cur;
1856                 }
1857         }
1858         info(udev, "shrunk to %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1859              rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1860         info(udev, "used %zu bytes of string index nodes (%hu * %zu bytes)\n",
1861              rules->trie_cur * sizeof(struct trie_node), rules->trie_cur, sizeof(struct trie_node));
1862
1863         /* cleanup trie */
1864         free(rules->trie);
1865         rules->trie = NULL;
1866         rules->trie_cur = 0;
1867         rules->trie_max = 0;
1868         free(rules->trie_root);
1869         rules->trie_root = NULL;
1870
1871         /* cleanup uid/gid cache */
1872         free(rules->uids);
1873         rules->uids = NULL;
1874         rules->uids_cur = 0;
1875         rules->uids_max = 0;
1876         free(rules->gids);
1877         rules->gids = NULL;
1878         rules->gids_cur = 0;
1879         rules->gids_max = 0;
1880
1881         dump_rules(rules);
1882         return rules;
1883 }
1884
1885 void udev_rules_unref(struct udev_rules *rules)
1886 {
1887         if (rules == NULL)
1888                 return;
1889         free(rules->tokens);
1890         free(rules->buf);
1891         free(rules->trie);
1892         free(rules->trie_root);
1893         free(rules->uids);
1894         free(rules->gids);
1895         free(rules);
1896 }
1897
1898 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1899 {
1900         char *key_value = &rules->buf[token->key.value_off];
1901         char *pos;
1902         int match = 0;
1903
1904         if (val == NULL)
1905                 val = "";
1906
1907         switch (token->key.glob) {
1908         case GL_PLAIN:
1909                 match = (strcmp(key_value, val) == 0);
1910                 break;
1911         case GL_GLOB:
1912                 match = (fnmatch(key_value, val, 0) == 0);
1913                 break;
1914         case GL_SPLIT:
1915                 {
1916                         const char *split;
1917                         size_t len;
1918
1919                         split = &rules->buf[token->key.value_off];
1920                         len = strlen(val);
1921                         while (1) {
1922                                 const char *next;
1923
1924                                 next = strchr(split, '|');
1925                                 if (next != NULL) {
1926                                         size_t matchlen = (size_t)(next - split);
1927
1928                                         match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1929                                         if (match)
1930                                                 break;
1931                                 } else {
1932                                         match = (strcmp(split, val) == 0);
1933                                         break;
1934                                 }
1935                                 split = &next[1];
1936                         }
1937                         break;
1938                 }
1939         case GL_SPLIT_GLOB:
1940                 {
1941                         char value[UTIL_PATH_SIZE];
1942
1943                         util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value));
1944                         key_value = value;
1945                         while (key_value != NULL) {
1946                                 pos = strchr(key_value, '|');
1947                                 if (pos != NULL) {
1948                                         pos[0] = '\0';
1949                                         pos = &pos[1];
1950                                 }
1951                                 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1952                                 match = (fnmatch(key_value, val, 0) == 0);
1953                                 if (match)
1954                                         break;
1955                                 key_value = pos;
1956                         }
1957                         break;
1958                 }
1959         case GL_SOMETHING:
1960                 match = (val[0] != '\0');
1961                 break;
1962         case GL_FORMAT:
1963         case GL_UNSET:
1964                 return -1;
1965         }
1966
1967         if (match && (token->key.op == OP_MATCH)) {
1968                 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1969                 return 0;
1970         }
1971         if (!match && (token->key.op == OP_NOMATCH)) {
1972                 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1973                 return 0;
1974         }
1975         dbg(rules->udev, "%s is not true\n", token_str(token->type));
1976         return -1;
1977 }
1978
1979 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1980 {
1981         const char *key_name = &rules->buf[cur->key.attr_off];
1982         const char *key_value = &rules->buf[cur->key.value_off];
1983         char value[UTIL_NAME_SIZE];
1984         size_t len;
1985
1986         value[0] = '\0';
1987         if (key_name[0] == '[') {
1988                 char attr[UTIL_PATH_SIZE];
1989
1990                 util_strlcpy(attr, key_name, sizeof(attr));
1991                 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
1992         }
1993         if (value[0] == '\0') {
1994                 const char *val;
1995
1996                 val = udev_device_get_sysattr_value(dev, key_name);
1997                 if (val == NULL)
1998                         return -1;
1999                 util_strlcpy(value, val, sizeof(value));
2000         }
2001
2002         /* strip trailing whitespace of value, if not asked to match for it */
2003         len = strlen(key_value);
2004         if (len > 0 && !isspace(key_value[len-1])) {
2005                 len = strlen(value);
2006                 while (len > 0 && isspace(value[--len]))
2007                         value[len] = '\0';
2008                 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
2009         }
2010         return match_key(rules, cur, value);
2011 }
2012
2013 enum escape_type {
2014         ESCAPE_UNSET,
2015         ESCAPE_NONE,
2016         ESCAPE_REPLACE,
2017 };
2018
2019 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
2020 {
2021         struct token *cur;
2022         struct token *rule;
2023         enum escape_type esc = ESCAPE_UNSET;
2024         int can_set_name;
2025
2026         if (rules->tokens == NULL)
2027                 return -1;
2028
2029         can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
2030                          strcmp(udev_device_get_action(event->dev), "change") == 0) &&
2031                         (major(udev_device_get_devnum(event->dev)) > 0 ||
2032                          strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
2033
2034         /* loop through token list, match, run actions or forward to next rule */
2035         cur = &rules->tokens[0];
2036         rule = cur;
2037         while (1) {
2038                 dump_token(rules, cur);
2039                 switch (cur->type) {
2040                 case TK_RULE:
2041                         /* current rule */
2042                         rule = cur;
2043                         /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2044                         if (!can_set_name && rule->rule.flags)
2045                                 ;//goto nomatch;
2046                         esc = ESCAPE_UNSET;
2047                         break;
2048                 case TK_M_ACTION:
2049                         if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2050                                 goto nomatch;
2051                         break;
2052                 case TK_M_DEVPATH:
2053                         if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2054                                 goto nomatch;
2055                         break;
2056                 case TK_M_KERNEL:
2057                         if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2058                                 goto nomatch;
2059                         break;
2060                 case TK_M_DEVLINK:
2061                         {
2062                                 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2063                                 struct udev_list_entry *list_entry;
2064                                 int match = 0;
2065
2066                                 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2067                                         const char *devlink;
2068
2069                                         devlink =  &udev_list_entry_get_name(list_entry)[devlen];
2070                                         if (match_key(rules, cur, devlink) == 0) {
2071                                                 match = 1;
2072                                                 break;
2073                                         }
2074                                 }
2075                                 if (!match)
2076                                         goto nomatch;
2077                                 break;
2078                         }
2079                 case TK_M_NAME:
2080                         if (match_key(rules, cur, event->name) != 0)
2081                                 goto nomatch;
2082                         break;
2083                 case TK_M_ENV:
2084                         {
2085                                 struct udev_list_entry *list_entry;
2086                                 const char *key_name = &rules->buf[cur->key.attr_off];
2087                                 const char *value;
2088
2089                                 list_entry = udev_device_get_properties_list_entry(event->dev);
2090                                 list_entry = udev_list_entry_get_by_name(list_entry, key_name);
2091                                 value = udev_list_entry_get_value(list_entry);
2092                                 if (value == NULL) {
2093                                         dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2094                                         value = "";
2095                                 }
2096                                 if (match_key(rules, cur, value))
2097                                         goto nomatch;
2098                                 break;
2099                         }
2100                 case TK_M_SUBSYSTEM:
2101                         if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2102                                 goto nomatch;
2103                         break;
2104                 case TK_M_DRIVER:
2105                         if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2106                                 goto nomatch;
2107                         break;
2108                 case TK_M_WAITFOR:
2109                         {
2110                                 char filename[UTIL_PATH_SIZE];
2111                                 int found;
2112
2113                                 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2114                                 udev_event_apply_format(event, filename, sizeof(filename));
2115                                 found = (wait_for_file(event->dev, filename, 10) == 0);
2116                                 if (!found && (cur->key.op != OP_NOMATCH))
2117                                         goto nomatch;
2118                                 break;
2119                         }
2120                 case TK_M_ATTR:
2121                         if (match_attr(rules, event->dev, event, cur) != 0)
2122                                 goto nomatch;
2123                         break;
2124                 case TK_M_KERNELS:
2125                 case TK_M_SUBSYSTEMS:
2126                 case TK_M_DRIVERS:
2127                 case TK_M_ATTRS:
2128                         {
2129                                 struct token *next;
2130
2131                                 /* get whole sequence of parent matches */
2132                                 next = cur;
2133                                 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2134                                         next++;
2135
2136                                 /* loop over parents */
2137                                 event->dev_parent = event->dev;
2138                                 while (1) {
2139                                         struct token *key;
2140
2141                                         dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2142                                         /* loop over sequence of parent match keys */
2143                                         for (key = cur; key < next; key++ ) {
2144                                                 dump_token(rules, key);
2145                                                 switch(key->type) {
2146                                                 case TK_M_KERNELS:
2147                                                         if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2148                                                                 goto try_parent;
2149                                                         break;
2150                                                 case TK_M_SUBSYSTEMS:
2151                                                         if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2152                                                                 goto try_parent;
2153                                                         break;
2154                                                 case TK_M_DRIVERS:
2155                                                         if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2156                                                                 goto try_parent;
2157                                                         break;
2158                                                 case TK_M_ATTRS:
2159                                                         if (match_attr(rules, event->dev_parent, event, key) != 0)
2160                                                                 goto try_parent;
2161                                                         break;
2162                                                 default:
2163                                                         goto nomatch;
2164                                                 }
2165                                                 dbg(event->udev, "parent key matched\n");
2166                                         }
2167                                         dbg(event->udev, "all parent keys matched\n");
2168                                         /* all keys matched */
2169                                         break;
2170
2171                                 try_parent:
2172                                         event->dev_parent = udev_device_get_parent(event->dev_parent);
2173                                         if (event->dev_parent == NULL)
2174                                                 goto nomatch;
2175                                 }
2176                                 /* move behind our sequence of parent match keys */
2177                                 cur = next;
2178                                 continue;
2179                         }
2180                 case TK_M_TEST:
2181                         {
2182                                 char filename[UTIL_PATH_SIZE];
2183                                 struct stat statbuf;
2184                                 int match;
2185
2186                                 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2187                                 udev_event_apply_format(event, filename, sizeof(filename));
2188                                 if (util_resolve_subsys_kernel(event->udev, NULL, filename, sizeof(filename), 0) != 0)
2189                                         if (filename[0] != '/') {
2190                                                 char tmp[UTIL_PATH_SIZE];
2191
2192                                                 util_strlcpy(tmp, udev_device_get_syspath(event->dev), sizeof(tmp));
2193                                                 util_strlcat(tmp, "/", sizeof(tmp));
2194                                                 util_strlcat(tmp, filename, sizeof(tmp));
2195                                                 util_strlcpy(filename, tmp, sizeof(filename));
2196                                         }
2197
2198                                 attr_subst_subdir(filename, sizeof(filename));
2199
2200                                 match = (stat(filename, &statbuf) == 0);
2201                                 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2202                                 if (match && cur->key.mode > 0) {
2203                                         match = ((statbuf.st_mode & cur->key.mode) > 0);
2204                                         dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2205                                             match ? "matches" : "does not match", cur->key.mode);
2206                                 }
2207                                 if (match && cur->key.op == OP_NOMATCH)
2208                                         goto nomatch;
2209                                 if (!match && cur->key.op == OP_MATCH)
2210                                         goto nomatch;
2211                                 break;
2212                         }
2213                 case TK_M_PROGRAM:
2214                         {
2215                                 char program[UTIL_PATH_SIZE];
2216                                 char **envp;
2217                                 char result[UTIL_PATH_SIZE];
2218
2219                                 free(event->program_result);
2220                                 event->program_result = NULL;
2221                                 util_strlcpy(program, &rules->buf[cur->key.value_off], sizeof(program));
2222                                 udev_event_apply_format(event, program, sizeof(program));
2223                                 envp = udev_device_get_properties_envp(event->dev);
2224                                 info(event->udev, "PROGRAM '%s' %s:%u\n",
2225                                      program,
2226                                      &rules->buf[rule->rule.filename_off],
2227                                      rule->rule.filename_line);
2228                                 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2229                                         if (cur->key.op != OP_NOMATCH)
2230                                                 goto nomatch;
2231                                 } else {
2232                                         int count;
2233
2234                                         util_remove_trailing_chars(result, '\n');
2235                                         if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2236                                                 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2237                                                 if (count > 0)
2238                                                         info(event->udev, "%i character(s) replaced\n" , count);
2239                                         }
2240                                         event->program_result = strdup(result);
2241                                         dbg(event->udev, "storing result '%s'\n", event->program_result);
2242                                         if (cur->key.op == OP_NOMATCH)
2243                                                 goto nomatch;
2244                                 }
2245                                 break;
2246                         }
2247                 case TK_M_IMPORT_FILE:
2248                         {
2249                                 char import[UTIL_PATH_SIZE];
2250
2251                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2252                                 udev_event_apply_format(event, import, sizeof(import));
2253                                 if (import_file_into_properties(event->dev, import) != 0)
2254                                         if (cur->key.op != OP_NOMATCH)
2255                                                 goto nomatch;
2256                                 break;
2257                         }
2258                 case TK_M_IMPORT_PROG:
2259                         {
2260                                 char import[UTIL_PATH_SIZE];
2261
2262                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2263                                 udev_event_apply_format(event, import, sizeof(import));
2264                                 info(event->udev, "IMPORT '%s' %s:%u\n",
2265                                      import,
2266                                      &rules->buf[rule->rule.filename_off],
2267                                      rule->rule.filename_line);
2268                                 if (import_program_into_properties(event->dev, import) != 0)
2269                                         if (cur->key.op != OP_NOMATCH)
2270                                                 goto nomatch;
2271                                 break;
2272                         }
2273                 case TK_M_IMPORT_PARENT:
2274                         {
2275                                 char import[UTIL_PATH_SIZE];
2276
2277                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2278                                 udev_event_apply_format(event, import, sizeof(import));
2279                                 if (import_parent_into_properties(event->dev, import) != 0)
2280                                         if (cur->key.op != OP_NOMATCH)
2281                                                 goto nomatch;
2282                                 break;
2283                         }
2284                 case TK_M_RESULT:
2285                         if (match_key(rules, cur, event->program_result) != 0)
2286                                 goto nomatch;
2287                         break;
2288
2289                 case TK_A_IGNORE_DEVICE:
2290                         event->ignore_device = 1;
2291                         return 0;
2292                         break;
2293                 case TK_A_STRING_ESCAPE_NONE:
2294                         esc = ESCAPE_NONE;
2295                         break;
2296                 case TK_A_STRING_ESCAPE_REPLACE:
2297                         esc = ESCAPE_REPLACE;
2298                         break;
2299                 case TK_A_NUM_FAKE_PART:
2300                         if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2301                                 break;
2302                         if (udev_device_get_sysnum(event->dev) != NULL)
2303                                 break;
2304                         udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2305                         break;
2306                 case TK_A_DEVLINK_PRIO:
2307                         udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2308                         break;
2309                 case TK_A_OWNER:
2310                         {
2311                                 char owner[UTIL_NAME_SIZE];
2312
2313                                 if (event->owner_final)
2314                                         break;
2315                                 if (cur->key.op == OP_ASSIGN_FINAL)
2316                                         event->owner_final = 1;
2317                                 util_strlcpy(owner,  &rules->buf[cur->key.value_off], sizeof(owner));
2318                                 udev_event_apply_format(event, owner, sizeof(owner));
2319                                 event->uid = util_lookup_user(event->udev, owner);
2320                                 info(event->udev, "OWNER %u %s:%u\n",
2321                                      event->uid,
2322                                      &rules->buf[rule->rule.filename_off],
2323                                      rule->rule.filename_line);
2324                                 break;
2325                         }
2326                 case TK_A_GROUP:
2327                         {
2328                                 char group[UTIL_NAME_SIZE];
2329
2330                                 if (event->group_final)
2331                                         break;
2332                                 if (cur->key.op == OP_ASSIGN_FINAL)
2333                                         event->group_final = 1;
2334                                 util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group));
2335                                 udev_event_apply_format(event, group, sizeof(group));
2336                                 event->gid = util_lookup_group(event->udev, group);
2337                                 info(event->udev, "GROUP %u %s:%u\n",
2338                                      event->gid,
2339                                      &rules->buf[rule->rule.filename_off],
2340                                      rule->rule.filename_line);
2341                                 break;
2342                         }
2343                 case TK_A_MODE:
2344                         {
2345                                 char mode[UTIL_NAME_SIZE];
2346                                 char *endptr;
2347
2348                                 if (event->mode_final)
2349                                         break;
2350                                 if (cur->key.op == OP_ASSIGN_FINAL)
2351                                         event->mode_final = 1;
2352                                 util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode));
2353                                 udev_event_apply_format(event, mode, sizeof(mode));
2354                                 event->mode = strtol(mode, &endptr, 8);
2355                                 if (endptr[0] != '\0') {
2356                                         err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2357                                         event->mode = 0660;
2358                                 }
2359                                 info(event->udev, "MODE %#o %s:%u\n",
2360                                      event->mode,
2361                                      &rules->buf[rule->rule.filename_off],
2362                                      rule->rule.filename_line);
2363                                 break;
2364                         }
2365                 case TK_A_OWNER_ID:
2366                         if (event->owner_final)
2367                                 break;
2368                         if (cur->key.op == OP_ASSIGN_FINAL)
2369                                 event->owner_final = 1;
2370                         event->uid = cur->key.uid;
2371                         info(event->udev, "OWNER %u %s:%u\n",
2372                              event->uid,
2373                              &rules->buf[rule->rule.filename_off],
2374                              rule->rule.filename_line);
2375                         break;
2376                 case TK_A_GROUP_ID:
2377                         if (event->group_final)
2378                                 break;
2379                         if (cur->key.op == OP_ASSIGN_FINAL)
2380                                 event->group_final = 1;
2381                         event->gid = cur->key.gid;
2382                         info(event->udev, "GROUP %u %s:%u\n",
2383                              event->gid,
2384                              &rules->buf[rule->rule.filename_off],
2385                              rule->rule.filename_line);
2386                         break;
2387                 case TK_A_MODE_ID:
2388                         if (event->mode_final)
2389                                 break;
2390                         if (cur->key.op == OP_ASSIGN_FINAL)
2391                                 event->mode_final = 1;
2392                         event->mode = cur->key.mode;
2393                         info(event->udev, "MODE %#o %s:%u\n",
2394                              event->mode,
2395                              &rules->buf[rule->rule.filename_off],
2396                              rule->rule.filename_line);
2397                         break;
2398                 case TK_A_ENV:
2399                         {
2400                                 const char *name = &rules->buf[cur->key.attr_off];
2401                                 char *value = &rules->buf[cur->key.value_off];
2402
2403                                 if (value[0] != '\0') {
2404                                         char temp_value[UTIL_NAME_SIZE];
2405                                         struct udev_list_entry *entry;
2406
2407                                         util_strlcpy(temp_value, value, sizeof(temp_value));
2408                                         udev_event_apply_format(event, temp_value, sizeof(temp_value));
2409                                         entry = udev_device_add_property(event->dev, name, temp_value);
2410                                         /* store in db */
2411                                         udev_list_entry_set_flag(entry, 1);
2412                                 } else {
2413                                         udev_device_add_property(event->dev, name, NULL);
2414                                 }
2415                                 break;
2416                         }
2417                 case TK_A_NAME:
2418                         {
2419                                 const char *name  = &rules->buf[cur->key.value_off];
2420                                 char name_str[UTIL_PATH_SIZE];
2421                                 int count;
2422
2423                                 if (event->name_final)
2424                                         break;
2425                                 if (cur->key.op == OP_ASSIGN_FINAL)
2426                                         event->name_final = 1;
2427                                 if (name[0] == '\0') {
2428                                         free(event->name);
2429                                         event->name = NULL;
2430                                         break;
2431                                 }
2432                                 util_strlcpy(name_str, name, sizeof(name_str));
2433                                 udev_event_apply_format(event, name_str, sizeof(name_str));
2434                                 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2435                                         count = udev_util_replace_chars(name_str, "/");
2436                                         if (count > 0)
2437                                                 info(event->udev, "%i character(s) replaced\n", count);
2438                                         free(event->name);
2439                                         event->name = strdup(name_str);
2440                                         info(event->udev, "NAME '%s' %s:%u\n",
2441                                              event->name,
2442                                              &rules->buf[rule->rule.filename_off],
2443                                              rule->rule.filename_line);
2444                                 }
2445                                 break;
2446                         }
2447                 case TK_A_DEVLINK:
2448                         {
2449                                 char temp[UTIL_PATH_SIZE];
2450                                 char filename[UTIL_PATH_SIZE];
2451                                 char *pos, *next;
2452                                 int count = 0;
2453
2454                                 if (event->devlink_final)
2455                                         break;
2456                                 if (major(udev_device_get_devnum(event->dev)) == 0)
2457                                         break;
2458                                 if (cur->key.op == OP_ASSIGN_FINAL)
2459                                         event->devlink_final = 1;
2460                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2461                                         udev_device_cleanup_devlinks_list(event->dev);
2462
2463                                 /* allow  multiple symlinks separated by spaces */
2464                                 util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));
2465                                 udev_event_apply_format(event, temp, sizeof(temp));
2466                                 if (esc == ESCAPE_UNSET)
2467                                         count = udev_util_replace_chars(temp, "/ ");
2468                                 else if (esc == ESCAPE_REPLACE)
2469                                         count = udev_util_replace_chars(temp, "/");
2470                                 if (count > 0)
2471                                         info(event->udev, "%i character(s) replaced\n" , count);
2472                                 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2473                                 pos = temp;
2474                                 while (isspace(pos[0]))
2475                                         pos++;
2476                                 next = strchr(pos, ' ');
2477                                 while (next) {
2478                                         next[0] = '\0';
2479                                         info(event->udev, "LINK '%s' %s:%u\n",
2480                                              pos,
2481                                              &rules->buf[rule->rule.filename_off],
2482                                              rule->rule.filename_line);
2483                                         util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2484                                         util_strlcat(filename, "/", sizeof(filename));
2485                                         util_strlcat(filename, pos, sizeof(filename));
2486                                         udev_device_add_devlink(event->dev, filename);
2487                                         while (isspace(next[1]))
2488                                                 next++;
2489                                         pos = &next[1];
2490                                         next = strchr(pos, ' ');
2491                                 }
2492                                 if (pos[0] != '\0') {
2493                                         info(event->udev, "LINK '%s' %s:%u\n",
2494                                              pos,
2495                                              &rules->buf[rule->rule.filename_off],
2496                                              rule->rule.filename_line);
2497                                         util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2498                                         util_strlcat(filename, "/", sizeof(filename));
2499                                         util_strlcat(filename, pos, sizeof(filename));
2500                                         udev_device_add_devlink(event->dev, filename);
2501                                 }
2502                         }
2503                         break;
2504                 case TK_A_EVENT_TIMEOUT:
2505                         udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2506                         break;
2507                 case TK_A_IGNORE_REMOVE:
2508                         udev_device_set_ignore_remove(event->dev, 1);
2509                         break;
2510                 case TK_A_ATTR:
2511                         {
2512                                 const char *key_name = &rules->buf[cur->key.attr_off];
2513                                 char attr[UTIL_PATH_SIZE];
2514                                 char value[UTIL_NAME_SIZE];
2515                                 FILE *f;
2516
2517                                 util_strlcpy(attr, key_name, sizeof(attr));
2518                                 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) {
2519                                         util_strlcpy(attr, udev_device_get_syspath(event->dev), sizeof(attr));
2520                                         util_strlcat(attr, "/", sizeof(attr));
2521                                         util_strlcat(attr, key_name, sizeof(attr));
2522                                 }
2523
2524                                 attr_subst_subdir(attr, sizeof(attr));
2525
2526                                 util_strlcpy(value, &rules->buf[cur->key.value_off], sizeof(value));
2527                                 udev_event_apply_format(event, value, sizeof(value));
2528                                 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2529                                      &rules->buf[rule->rule.filename_off],
2530                                      rule->rule.filename_line);
2531                                 f = fopen(attr, "w");
2532                                 if (f != NULL) {
2533                                         if (!event->test)
2534                                                 if (fprintf(f, "%s", value) <= 0)
2535                                                         err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2536                                         fclose(f);
2537                                 } else {
2538                                         err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2539                                 }
2540                                 break;
2541                         }
2542                 case TK_A_RUN:
2543                         {
2544                                 struct udev_list_entry *list_entry;
2545
2546                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2547                                         udev_list_cleanup_entries(event->udev, &event->run_list);
2548                                 info(event->udev, "RUN '%s' %s:%u\n",
2549                                      &rules->buf[cur->key.value_off],
2550                                      &rules->buf[rule->rule.filename_off],
2551                                      rule->rule.filename_line);
2552                                 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2553                                                                  &rules->buf[cur->key.value_off], NULL, 1, 0);
2554                                 if (cur->key.ignore_error)
2555                                         udev_list_entry_set_flag(list_entry, 1);
2556                                 break;
2557                         }
2558                 case TK_A_GOTO:
2559                         cur = &rules->tokens[cur->key.rule_goto];
2560                         continue;
2561                 case TK_A_LAST_RULE:
2562                 case TK_END:
2563                         return 0;
2564
2565                 case TK_M_PARENTS_MIN:
2566                 case TK_M_PARENTS_MAX:
2567                 case TK_M_MAX:
2568                 case TK_UNSET:
2569                         err(rules->udev, "wrong type %u\n", cur->type);
2570                         goto nomatch;
2571                 }
2572
2573                 cur++;
2574                 continue;
2575         nomatch:
2576                 /* fast-forward to next rule */
2577                 cur = rule + rule->rule.token_count;
2578                 dbg(rules->udev, "forward to rule: %u\n",
2579                                  (unsigned int) (cur - rules->tokens));
2580         }
2581 }