udev/udev-rules.c

   1 /*
   2  * Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org>
   3  * Copyright (C) 2008 Alan Jenkins <alan-jenkins@tuffmail.co.uk>
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <stddef.h>
  20 #include <limits.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <stdio.h>
  24 #include <fcntl.h>
  25 #include <ctype.h>
  26 #include <unistd.h>
  27 #include <errno.h>
  28 #include <dirent.h>
  29 #include <fnmatch.h>
  30
  31 #include "udev.h"
  32
  33 #define PREALLOC_TOKEN                  2048
  34 #define PREALLOC_STRBUF                 32 * 1024
  35 #define PREALLOC_TRIE                   256
  36
  37 struct uid_gid {
  38         unsigned int name_off;
  39         union {
  40                 uid_t   uid;
  41                 gid_t   gid;
  42         };
  43 };
  44
  45 struct trie_node {
  46         /* this node's first child */
  47         unsigned int child_idx;
  48         /* the next child of our parent node's child list */
  49         unsigned int next_child_idx;
  50         /* this node's last child (shortcut for append) */
  51         unsigned int last_child_idx;
  52         unsigned int value_off;
  53         unsigned short value_len;
  54         unsigned char key;
  55 };
  56
  57 struct udev_rules {
  58         struct udev *udev;
  59         int resolve_names;
  60
  61         /* every key in the rules file becomes a token */
  62         struct token *tokens;
  63         unsigned int token_cur;
  64         unsigned int token_max;
  65
  66         /* all key strings are copied to a single string buffer */
  67         char *buf;
  68         size_t buf_cur;
  69         size_t buf_max;
  70         unsigned int buf_count;
  71
  72         /* during rule parsing, strings are indexed to find duplicates */
  73         struct trie_node *trie_nodes;
  74         unsigned int trie_nodes_cur;
  75         unsigned int trie_nodes_max;
  76
  77         /* during rule parsing, uid/gid lookup results are cached */
  78         struct uid_gid *uids;
  79         unsigned int uids_cur;
  80         unsigned int uids_max;
  81         struct uid_gid *gids;
  82         unsigned int gids_cur;
  83         unsigned int gids_max;
  84 };
  85
  86 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
  87 enum operation_type {
  88         OP_UNSET,
  89
  90         OP_MATCH,
  91         OP_NOMATCH,
  92         OP_MATCH_MAX,
  93
  94         OP_ADD,
  95         OP_ASSIGN,
  96         OP_ASSIGN_FINAL,
  97 };
  98
  99 enum string_glob_type {
 100         GL_UNSET,
 101         GL_PLAIN,                       /* no special chars */
 102         GL_GLOB,                        /* shell globs ?,*,[] */
 103         GL_SPLIT,                       /* multi-value A|B */
 104         GL_SPLIT_GLOB,                  /* multi-value with glob A*|B* */
 105         GL_SOMETHING,                   /* commonly used "?*" */
 106         GL_FORMAT,
 107 };
 108
 109 /* tokens of a rule are sorted/handled in this order */
 110 enum token_type {
 111         TK_UNSET,
 112         TK_RULE,
 113
 114         TK_M_ACTION,                    /* val */
 115         TK_M_DEVPATH,                   /* val */
 116         TK_M_KERNEL,                    /* val */
 117         TK_M_DEVLINK,                   /* val */
 118         TK_M_NAME,                      /* val */
 119         TK_M_ENV,                       /* val, attr */
 120         TK_M_SUBSYSTEM,                 /* val */
 121         TK_M_DRIVER,                    /* val */
 122         TK_M_WAITFOR,                   /* val */
 123         TK_M_ATTR,                      /* val, attr */
 124
 125         TK_M_PARENTS_MIN,
 126         TK_M_KERNELS,                   /* val */
 127         TK_M_SUBSYSTEMS,                /* val */
 128         TK_M_DRIVERS,                   /* val */
 129         TK_M_ATTRS,                     /* val, attr */
 130         TK_M_PARENTS_MAX,
 131
 132         TK_M_TEST,                      /* val, mode_t */
 133         TK_M_PROGRAM,                   /* val */
 134         TK_M_IMPORT_FILE,               /* val */
 135         TK_M_IMPORT_PROG,               /* val */
 136         TK_M_IMPORT_PARENT,             /* val */
 137         TK_M_RESULT,                    /* val */
 138         TK_M_MAX,
 139
 140         TK_A_IGNORE_DEVICE,
 141         TK_A_STRING_ESCAPE_NONE,
 142         TK_A_STRING_ESCAPE_REPLACE,
 143         TK_A_INOTIFY_WATCH,             /* int */
 144         TK_A_NUM_FAKE_PART,             /* int */
 145         TK_A_DEVLINK_PRIO,              /* int */
 146         TK_A_OWNER,                     /* val */
 147         TK_A_GROUP,                     /* val */
 148         TK_A_MODE,                      /* val */
 149         TK_A_OWNER_ID,                  /* uid_t */
 150         TK_A_GROUP_ID,                  /* gid_t */
 151         TK_A_MODE_ID,                   /* mode_t */
 152         TK_A_ENV,                       /* val, attr */
 153         TK_A_NAME,                      /* val */
 154         TK_A_DEVLINK,                   /* val */
 155         TK_A_EVENT_TIMEOUT,             /* int */
 156         TK_A_IGNORE_REMOVE,
 157         TK_A_ATTR,                      /* val, attr */
 158         TK_A_RUN,                       /* val, bool */
 159         TK_A_GOTO,                      /* size_t */
 160         TK_A_LAST_RULE,
 161
 162         TK_END,
 163 };
 164
 165 /* we try to pack stuff in a way that we take only 12 bytes per token */
 166 struct token {
 167         union {
 168                 unsigned char type;             /* same as in rule and key */
 169                 struct {
 170                         unsigned char type;
 171                         unsigned char flags;
 172                         unsigned short token_count;
 173                         unsigned int label_off;
 174                         unsigned short filename_off;
 175                         unsigned short filename_line;
 176                 } rule;
 177                 struct {
 178                         unsigned char type;
 179                         unsigned char flags;
 180                         unsigned char op;
 181                         unsigned char glob;
 182                         unsigned int value_off;
 183                         union {
 184                                 unsigned int attr_off;
 185                                 int ignore_error;
 186                                 unsigned int rule_goto;
 187                                 mode_t  mode;
 188                                 uid_t uid;
 189                                 gid_t gid;
 190                                 int num_fake_part;
 191                                 int devlink_prio;
 192                                 int event_timeout;
 193                                 int watch;
 194                         };
 195                 } key;
 196         };
 197 };
 198
 199 #define MAX_TK          64
 200 struct rule_tmp {
 201         struct udev_rules *rules;
 202         struct token rule;
 203         struct token token[MAX_TK];
 204         unsigned int token_cur;
 205 };
 206
 207 #ifdef DEBUG
 208 static const char *operation_str(enum operation_type type)
 209 {
 210         static const char *operation_strs[] = {
 211                 [OP_UNSET] =            "UNSET",
 212                 [OP_MATCH] =            "match",
 213                 [OP_NOMATCH] =          "nomatch",
 214                 [OP_MATCH_MAX] =        "MATCH_MAX",
 215
 216                 [OP_ADD] =              "add",
 217                 [OP_ASSIGN] =           "assign",
 218                 [OP_ASSIGN_FINAL] =     "assign-final",
 219 }       ;
 220
 221         return operation_strs[type];
 222 }
 223
 224 static const char *string_glob_str(enum string_glob_type type)
 225 {
 226         static const char *string_glob_strs[] = {
 227                 [GL_UNSET] =            "UNSET",
 228                 [GL_PLAIN] =            "plain",
 229                 [GL_GLOB] =             "glob",
 230                 [GL_SPLIT] =            "split",
 231                 [GL_SPLIT_GLOB] =       "split-glob",
 232                 [GL_SOMETHING] =        "split-glob",
 233                 [GL_FORMAT] =           "format",
 234         };
 235
 236         return string_glob_strs[type];
 237 }
 238
 239 static const char *token_str(enum token_type type)
 240 {
 241         static const char *token_strs[] = {
 242                 [TK_UNSET] =                    "UNSET",
 243                 [TK_RULE] =                     "RULE",
 244
 245                 [TK_M_ACTION] =                 "M ACTION",
 246                 [TK_M_DEVPATH] =                "M DEVPATH",
 247                 [TK_M_KERNEL] =                 "M KERNEL",
 248                 [TK_M_DEVLINK] =                "M DEVLINK",
 249                 [TK_M_NAME] =                   "M NAME",
 250                 [TK_M_ENV] =                    "M ENV",
 251                 [TK_M_SUBSYSTEM] =              "M SUBSYSTEM",
 252                 [TK_M_DRIVER] =                 "M DRIVER",
 253                 [TK_M_WAITFOR] =                "M WAITFOR",
 254                 [TK_M_ATTR] =                   "M ATTR",
 255
 256                 [TK_M_PARENTS_MIN] =            "M PARENTS_MIN",
 257                 [TK_M_KERNELS] =                "M KERNELS",
 258                 [TK_M_SUBSYSTEMS] =             "M SUBSYSTEMS",
 259                 [TK_M_DRIVERS] =                "M DRIVERS",
 260                 [TK_M_ATTRS] =                  "M ATTRS",
 261                 [TK_M_PARENTS_MAX] =            "M PARENTS_MAX",
 262
 263                 [TK_M_TEST] =                   "M TEST",
 264                 [TK_M_PROGRAM] =                "M PROGRAM",
 265                 [TK_M_IMPORT_FILE] =            "M IMPORT_FILE",
 266                 [TK_M_IMPORT_PROG] =            "M IMPORT_PROG",
 267                 [TK_M_IMPORT_PARENT] =          "M MPORT_PARENT",
 268                 [TK_M_RESULT] =                 "M RESULT",
 269                 [TK_M_MAX] =                    "M MAX",
 270
 271                 [TK_A_IGNORE_DEVICE] =          "A IGNORE_DEVICE",
 272                 [TK_A_STRING_ESCAPE_NONE] =     "A STRING_ESCAPE_NONE",
 273                 [TK_A_STRING_ESCAPE_REPLACE] =  "A STRING_ESCAPE_REPLACE",
 274                 [TK_A_INOTIFY_WATCH] =          "A INOTIFY_WATCH",
 275                 [TK_A_NUM_FAKE_PART] =          "A NUM_FAKE_PART",
 276                 [TK_A_DEVLINK_PRIO] =           "A DEVLINK_PRIO",
 277                 [TK_A_OWNER] =                  "A OWNER",
 278                 [TK_A_GROUP] =                  "A GROUP",
 279                 [TK_A_MODE] =                   "A MODE",
 280                 [TK_A_OWNER_ID] =               "A OWNER_ID",
 281                 [TK_A_GROUP_ID] =               "A GROUP_ID",
 282                 [TK_A_MODE_ID] =                "A MODE_ID",
 283                 [TK_A_ENV] =                    "A ENV",
 284                 [TK_A_NAME] =                   "A NAME",
 285                 [TK_A_DEVLINK] =                "A DEVLINK",
 286                 [TK_A_EVENT_TIMEOUT] =          "A EVENT_TIMEOUT",
 287                 [TK_A_IGNORE_REMOVE] =          "A IGNORE_REMOVE",
 288                 [TK_A_ATTR] =                   "A ATTR",
 289                 [TK_A_RUN] =                    "A RUN",
 290                 [TK_A_GOTO] =                   "A GOTO",
 291                 [TK_A_LAST_RULE] =              "A LAST_RULE",
 292
 293                 [TK_END] =                      "END",
 294         };
 295
 296         return token_strs[type];
 297 }
 298
 299 static void dump_token(struct udev_rules *rules, struct token *token)
 300 {
 301         enum token_type type = token->type;
 302         enum operation_type op = token->key.op;
 303         enum string_glob_type glob = token->key.glob;
 304         const char *value = &rules->buf[token->key.value_off];
 305         const char *attr = &rules->buf[token->key.attr_off];
 306
 307         switch (type) {
 308         case TK_RULE:
 309                 {
 310                         const char *tks_ptr = (char *)rules->tokens;
 311                         const char *tk_ptr = (char *)token;
 312                         unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
 313
 314                         dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
 315                             &rules->buf[token->rule.filename_off], token->rule.filename_line,
 316                             idx, token->rule.token_count,
 317                             &rules->buf[token->rule.label_off],
 318                             token->rule.flags);
 319                         break;
 320                 }
 321         case TK_M_ACTION:
 322         case TK_M_DEVPATH:
 323         case TK_M_KERNEL:
 324         case TK_M_SUBSYSTEM:
 325         case TK_M_DRIVER:
 326         case TK_M_WAITFOR:
 327         case TK_M_DEVLINK:
 328         case TK_M_NAME:
 329         case TK_M_KERNELS:
 330         case TK_M_SUBSYSTEMS:
 331         case TK_M_DRIVERS:
 332         case TK_M_PROGRAM:
 333         case TK_M_IMPORT_FILE:
 334         case TK_M_IMPORT_PROG:
 335         case TK_M_IMPORT_PARENT:
 336         case TK_M_RESULT:
 337         case TK_A_NAME:
 338         case TK_A_DEVLINK:
 339         case TK_A_OWNER:
 340         case TK_A_GROUP:
 341         case TK_A_MODE:
 342         case TK_A_RUN:
 343                 dbg(rules->udev, "%s %s '%s'(%s)\n",
 344                     token_str(type), operation_str(op), value, string_glob_str(glob));
 345                 break;
 346         case TK_M_ATTR:
 347         case TK_M_ATTRS:
 348         case TK_M_ENV:
 349         case TK_A_ATTR:
 350         case TK_A_ENV:
 351                 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
 352                     token_str(type), operation_str(op), attr, value, string_glob_str(glob));
 353                 break;
 354         case TK_A_IGNORE_DEVICE:
 355         case TK_A_STRING_ESCAPE_NONE:
 356         case TK_A_STRING_ESCAPE_REPLACE:
 357         case TK_A_LAST_RULE:
 358         case TK_A_IGNORE_REMOVE:
 359                 dbg(rules->udev, "%s\n", token_str(type));
 360                 break;
 361         case TK_M_TEST:
 362                 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
 363                     token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
 364                 break;
 365         case TK_A_INOTIFY_WATCH:
 366                 dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch);
 367                 break;
 368         case TK_A_NUM_FAKE_PART:
 369                 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
 370                 break;
 371         case TK_A_DEVLINK_PRIO:
 372                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
 373                 break;
 374         case TK_A_OWNER_ID:
 375                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
 376                 break;
 377         case TK_A_GROUP_ID:
 378                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
 379                 break;
 380         case TK_A_MODE_ID:
 381                 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
 382                 break;
 383         case TK_A_EVENT_TIMEOUT:
 384                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
 385                 break;
 386         case TK_A_GOTO:
 387                 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
 388                 break;
 389         case TK_END:
 390                 dbg(rules->udev, "* %s\n", token_str(type));
 391                 break;
 392         case TK_M_PARENTS_MIN:
 393         case TK_M_PARENTS_MAX:
 394         case TK_M_MAX:
 395         case TK_UNSET:
 396                 dbg(rules->udev, "unknown type %u\n", type);
 397                 break;
 398         }
 399 }
 400
 401 static void dump_rules(struct udev_rules *rules)
 402 {
 403         unsigned int i;
 404
 405         dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
 406             rules->token_cur,
 407             rules->token_cur * sizeof(struct token),
 408             rules->buf_count,
 409             rules->buf_cur);
 410         for(i = 0; i < rules->token_cur; i++)
 411                 dump_token(rules, &rules->tokens[i]);
 412 }
 413 #else
 414 static inline const char *operation_str(enum operation_type type) { return NULL; }
 415 static inline const char *token_str(enum token_type type) { return NULL; }
 416 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
 417 static inline void dump_rules(struct udev_rules *rules) {}
 418 #endif /* DEBUG */
 419
 420 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
 421 {
 422         int off;
 423
 424         /* grow buffer if needed */
 425         if (rules->buf_cur + bytes+1 >= rules->buf_max) {
 426                 char *buf;
 427                 unsigned int add;
 428
 429                 /* double the buffer size */
 430                 add = rules->buf_max;
 431                 if (add < bytes * 8)
 432                         add = bytes * 8;
 433
 434                 buf = realloc(rules->buf, rules->buf_max + add);
 435                 if (buf == NULL)
 436                         return -1;
 437                 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
 438                 rules->buf = buf;
 439                 rules->buf_max += add;
 440         }
 441         off = rules->buf_cur;
 442         memcpy(&rules->buf[rules->buf_cur], str, bytes);
 443         rules->buf_cur += bytes;
 444         rules->buf_count++;
 445         return off;
 446 }
 447
 448 static int add_string(struct udev_rules *rules, const char *str)
 449 {
 450         unsigned int node_idx;
 451         struct trie_node *new_node;
 452         unsigned int new_node_idx;
 453         unsigned char key;
 454         unsigned short len;
 455         unsigned int depth;
 456         unsigned int off;
 457         struct trie_node *parent;
 458
 459         /* walk trie, start from last character of str to find matching tails */
 460         len = strlen(str);
 461         key = str[len-1];
 462         node_idx = 0;
 463         for (depth = 0; depth <= len; depth++) {
 464                 struct trie_node *node;
 465                 unsigned int child_idx;
 466
 467                 node = &rules->trie_nodes[node_idx];
 468                 off = node->value_off + node->value_len - len;
 469
 470                 /* match against current node */
 471                 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
 472                         return off;
 473
 474                 /* lookup child node */
 475                 key = str[len - 1 - depth];
 476                 child_idx = node->child_idx;
 477                 while (child_idx > 0) {
 478                         struct trie_node *child;
 479
 480                         child = &rules->trie_nodes[child_idx];
 481                         if (child->key == key)
 482                                 break;
 483                         child_idx = child->next_child_idx;
 484                 }
 485                 if (child_idx == 0)
 486                         break;
 487                 node_idx = child_idx;
 488         }
 489
 490         /* string not found, add it */
 491         off = add_new_string(rules, str, len + 1);
 492
 493         /* grow trie nodes if needed */
 494         if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
 495                 struct trie_node *nodes;
 496                 unsigned int add;
 497
 498                 /* double the buffer size */
 499                 add = rules->trie_nodes_max;
 500                 if (add < 8)
 501                         add = 8;
 502
 503                 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
 504                 if (nodes == NULL)
 505                         return -1;
 506                 dbg(rules->udev, "extend trie nodes from %u to %u\n",
 507                     rules->trie_nodes_max, rules->trie_nodes_max + add);
 508                 rules->trie_nodes = nodes;
 509                 rules->trie_nodes_max += add;
 510         }
 511
 512         /* get a new node */
 513         new_node_idx = rules->trie_nodes_cur;
 514         rules->trie_nodes_cur++;
 515         new_node = &rules->trie_nodes[new_node_idx];
 516         memset(new_node, 0x00, sizeof(struct trie_node));
 517         new_node->value_off = off;
 518         new_node->value_len = len;
 519         new_node->key = key;
 520
 521         /* join the parent's child list */
 522         parent = &rules->trie_nodes[node_idx];
 523         if (parent->child_idx == 0) {
 524                 parent->child_idx = new_node_idx;
 525         } else {
 526                 struct trie_node *last_child;
 527
 528                 last_child = &rules->trie_nodes[parent->last_child_idx];
 529                 last_child->next_child_idx = new_node_idx;
 530         }
 531         parent->last_child_idx = new_node_idx;
 532         return off;
 533 }
 534
 535 static int add_token(struct udev_rules *rules, struct token *token)
 536 {
 537         /* grow buffer if needed */
 538         if (rules->token_cur+1 >= rules->token_max) {
 539                 struct token *tokens;
 540                 unsigned int add;
 541
 542                 /* double the buffer size */
 543                 add = rules->token_max;
 544                 if (add < 8)
 545                         add = 8;
 546
 547                 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
 548                 if (tokens == NULL)
 549                         return -1;
 550                 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
 551                 rules->tokens = tokens;
 552                 rules->token_max += add;
 553         }
 554         memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
 555         rules->token_cur++;
 556         return 0;
 557 }
 558
 559 static uid_t add_uid(struct udev_rules *rules, const char *owner)
 560 {
 561         unsigned int i;
 562         uid_t uid;
 563         unsigned int off;
 564
 565         /* lookup, if we know it already */
 566         for (i = 0; i < rules->uids_cur; i++) {
 567                 off = rules->uids[i].name_off;
 568                 if (strcmp(&rules->buf[off], owner) == 0) {
 569                         uid = rules->uids[i].uid;
 570                         dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
 571                         return uid;
 572                 }
 573         }
 574         uid = util_lookup_user(rules->udev, owner);
 575
 576         /* grow buffer if needed */
 577         if (rules->uids_cur+1 >= rules->uids_max) {
 578                 struct uid_gid *uids;
 579                 unsigned int add;
 580
 581                 /* double the buffer size */
 582                 add = rules->uids_max;
 583                 if (add < 1)
 584                         add = 8;
 585
 586                 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
 587                 if (uids == NULL)
 588                         return uid;
 589                 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
 590                 rules->uids = uids;
 591                 rules->uids_max += add;
 592         }
 593         rules->uids[rules->uids_cur].uid = uid;
 594         off = add_string(rules, owner);
 595         if (off <= 0)
 596                 return uid;
 597         rules->uids[rules->uids_cur].name_off = off;
 598         rules->uids_cur++;
 599         return uid;
 600 }
 601
 602 static gid_t add_gid(struct udev_rules *rules, const char *group)
 603 {
 604         unsigned int i;
 605         gid_t gid;
 606         unsigned int off;
 607
 608         /* lookup, if we know it already */
 609         for (i = 0; i < rules->gids_cur; i++) {
 610                 off = rules->gids[i].name_off;
 611                 if (strcmp(&rules->buf[off], group) == 0) {
 612                         gid = rules->gids[i].gid;
 613                         dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
 614                         return gid;
 615                 }
 616         }
 617         gid = util_lookup_group(rules->udev, group);
 618
 619         /* grow buffer if needed */
 620         if (rules->gids_cur+1 >= rules->gids_max) {
 621                 struct uid_gid *gids;
 622                 unsigned int add;
 623
 624                 /* double the buffer size */
 625                 add = rules->gids_max;
 626                 if (add < 1)
 627                         add = 8;
 628
 629                 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
 630                 if (gids == NULL)
 631                         return gid;
 632                 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
 633                 rules->gids = gids;
 634                 rules->gids_max += add;
 635         }
 636         rules->gids[rules->gids_cur].gid = gid;
 637         off = add_string(rules, group);
 638         if (off <= 0)
 639                 return gid;
 640         rules->gids[rules->gids_cur].name_off = off;
 641         rules->gids_cur++;
 642         return gid;
 643 }
 644
 645 static int import_property_from_string(struct udev_device *dev, char *line)
 646 {
 647         struct udev *udev = udev_device_get_udev(dev);
 648         char *key;
 649         char *val;
 650         size_t len;
 651
 652         /* find key */
 653         key = line;
 654         while (isspace(key[0]))
 655                 key++;
 656
 657         /* comment or empty line */
 658         if (key[0] == '#' || key[0] == '\0')
 659                 return -1;
 660
 661         /* split key/value */
 662         val = strchr(key, '=');
 663         if (val == NULL)
 664                 return -1;
 665         val[0] = '\0';
 666         val++;
 667
 668         /* find value */
 669         while (isspace(val[0]))
 670                 val++;
 671
 672         /* terminate key */
 673         len = strlen(key);
 674         if (len == 0)
 675                 return -1;
 676         while (isspace(key[len-1]))
 677                 len--;
 678         key[len] = '\0';
 679
 680         /* terminate value */
 681         len = strlen(val);
 682         if (len == 0)
 683                 return -1;
 684         while (isspace(val[len-1]))
 685                 len--;
 686         val[len] = '\0';
 687
 688         if (len == 0)
 689                 return -1;
 690
 691         /* unquote */
 692         if (val[0] == '"' || val[0] == '\'') {
 693                 if (val[len-1] != val[0]) {
 694                         info(udev, "inconsistent quoting: '%s', skip\n", line);
 695                         return -1;
 696                 }
 697                 val[len-1] = '\0';
 698                 val++;
 699         }
 700
 701         dbg(udev, "adding '%s'='%s'\n", key, val);
 702
 703         /* handle device, renamed by external tool, returning new path */
 704         if (strcmp(key, "DEVPATH") == 0) {
 705                 char syspath[UTIL_PATH_SIZE];
 706
 707                 info(udev, "updating devpath from '%s' to '%s'\n",
 708                      udev_device_get_devpath(dev), val);
 709                 util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
 710                 util_strlcat(syspath, val, sizeof(syspath));
 711                 udev_device_set_syspath(dev, syspath);
 712         } else {
 713                 struct udev_list_entry *entry;
 714
 715                 entry = udev_device_add_property(dev, key, val);
 716                 /* store in db */
 717                 udev_list_entry_set_flag(entry, 1);
 718         }
 719         return 0;
 720 }
 721
 722 static int import_file_into_properties(struct udev_device *dev, const char *filename)
 723 {
 724         FILE *f;
 725         char line[UTIL_LINE_SIZE];
 726
 727         f = fopen(filename, "r");
 728         if (f == NULL)
 729                 return -1;
 730         while (fgets(line, sizeof(line), f) != NULL)
 731                 import_property_from_string(dev, line);
 732         fclose(f);
 733         return 0;
 734 }
 735
 736 static int import_program_into_properties(struct udev_device *dev, const char *program)
 737 {
 738         struct udev *udev = udev_device_get_udev(dev);
 739         char **envp;
 740         char result[4096];
 741         size_t reslen;
 742         char *line;
 743
 744         envp = udev_device_get_properties_envp(dev);
 745         if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
 746                 return -1;
 747
 748         line = result;
 749         while (line != NULL) {
 750                 char *pos;
 751
 752                 pos = strchr(line, '\n');
 753                 if (pos != NULL) {
 754                         pos[0] = '\0';
 755                         pos = &pos[1];
 756                 }
 757                 import_property_from_string(dev, line);
 758                 line = pos;
 759         }
 760         return 0;
 761 }
 762
 763 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
 764 {
 765         struct udev *udev = udev_device_get_udev(dev);
 766         struct udev_device *dev_parent;
 767         struct udev_list_entry *list_entry;
 768
 769         dev_parent = udev_device_get_parent(dev);
 770         if (dev_parent == NULL)
 771                 return -1;
 772
 773         dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
 774         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
 775                 const char *key = udev_list_entry_get_name(list_entry);
 776                 const char *val = udev_list_entry_get_value(list_entry);
 777
 778                 if (fnmatch(filter, key, 0) == 0) {
 779                         struct udev_list_entry *entry;
 780
 781                         dbg(udev, "import key '%s=%s'\n", key, val);
 782                         entry = udev_device_add_property(dev, key, val);
 783                         /* store in db */
 784                         udev_list_entry_set_flag(entry, 1);
 785                 }
 786         }
 787         return 0;
 788 }
 789
 790 #define WAIT_LOOP_PER_SECOND            50
 791 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
 792 {
 793         struct udev *udev = udev_device_get_udev(dev);
 794         char filepath[UTIL_PATH_SIZE];
 795         char devicepath[UTIL_PATH_SIZE];
 796         struct stat stats;
 797         int loop = timeout * WAIT_LOOP_PER_SECOND;
 798
 799         /* a relative path is a device attribute */
 800         devicepath[0] = '\0';
 801         if (file[0] != '/') {
 802                 util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath));
 803                 util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath));
 804
 805                 util_strlcpy(filepath, devicepath, sizeof(filepath));
 806                 util_strlcat(filepath, "/", sizeof(filepath));
 807                 util_strlcat(filepath, file, sizeof(filepath));
 808                 file = filepath;
 809         }
 810
 811         dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
 812         while (--loop) {
 813                 /* lookup file */
 814                 if (stat(file, &stats) == 0) {
 815                         info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
 816                         return 0;
 817                 }
 818                 /* make sure, the device did not disappear in the meantime */
 819                 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
 820                         info(udev, "device disappeared while waiting for '%s'\n", file);
 821                         return -2;
 822                 }
 823                 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
 824                 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
 825         }
 826         info(udev, "waiting for '%s' failed\n", file);
 827         return -1;
 828 }
 829
 830 static int attr_subst_subdir(char *attr, size_t len)
 831 {
 832         char *pos;
 833         int found = 0;
 834
 835         pos = strstr(attr, "/*/");
 836         if (pos != NULL) {
 837                 char str[UTIL_PATH_SIZE];
 838                 DIR *dir;
 839
 840                 pos[1] = '\0';
 841                 util_strlcpy(str, &pos[2], sizeof(str));
 842                 dir = opendir(attr);
 843                 if (dir != NULL) {
 844                         struct dirent *dent;
 845
 846                         for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 847                                 struct stat stats;
 848
 849                                 if (dent->d_name[0] == '.')
 850                                         continue;
 851                                 util_strlcat(attr, dent->d_name, len);
 852                                 util_strlcat(attr, str, len);
 853                                 if (stat(attr, &stats) == 0) {
 854                                         found = 1;
 855                                         break;
 856                                 }
 857                                 pos[1] = '\0';
 858                         }
 859                         closedir(dir);
 860                 }
 861                 if (!found)
 862                         util_strlcat(attr, str, len);
 863         }
 864
 865         return found;
 866 }
 867
 868 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
 869 {
 870         char *linepos;
 871         char *temp;
 872
 873         linepos = *line;
 874         if (linepos == NULL && linepos[0] == '\0')
 875                 return -1;
 876
 877         /* skip whitespace */
 878         while (isspace(linepos[0]) || linepos[0] == ',')
 879                 linepos++;
 880
 881         /* get the key */
 882         if (linepos[0] == '\0')
 883                 return -1;
 884         *key = linepos;
 885
 886         while (1) {
 887                 linepos++;
 888                 if (linepos[0] == '\0')
 889                         return -1;
 890                 if (isspace(linepos[0]))
 891                         break;
 892                 if (linepos[0] == '=')
 893                         break;
 894                 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
 895                         if (linepos[1] == '=')
 896                                 break;
 897         }
 898
 899         /* remember end of key */
 900         temp = linepos;
 901
 902         /* skip whitespace after key */
 903         while (isspace(linepos[0]))
 904                 linepos++;
 905         if (linepos[0] == '\0')
 906                 return -1;
 907
 908         /* get operation type */
 909         if (linepos[0] == '=' && linepos[1] == '=') {
 910                 *op = OP_MATCH;
 911                 linepos += 2;
 912         } else if (linepos[0] == '!' && linepos[1] == '=') {
 913                 *op = OP_NOMATCH;
 914                 linepos += 2;
 915         } else if (linepos[0] == '+' && linepos[1] == '=') {
 916                 *op = OP_ADD;
 917                 linepos += 2;
 918         } else if (linepos[0] == '=') {
 919                 *op = OP_ASSIGN;
 920                 linepos++;
 921         } else if (linepos[0] == ':' && linepos[1] == '=') {
 922                 *op = OP_ASSIGN_FINAL;
 923                 linepos += 2;
 924         } else
 925                 return -1;
 926
 927         /* terminate key */
 928         temp[0] = '\0';
 929
 930         /* skip whitespace after operator */
 931         while (isspace(linepos[0]))
 932                 linepos++;
 933         if (linepos[0] == '\0')
 934                 return -1;
 935
 936         /* get the value */
 937         if (linepos[0] == '"')
 938                 linepos++;
 939         else
 940                 return -1;
 941         *value = linepos;
 942
 943         /* terminate */
 944         temp = strchr(linepos, '"');
 945         if (!temp)
 946                 return -1;
 947         temp[0] = '\0';
 948         temp++;
 949         dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
 950
 951         /* move line to next key */
 952         *line = temp;
 953         return 0;
 954 }
 955
 956 /* extract possible KEY{attr} */
 957 static char *get_key_attribute(struct udev *udev, char *str)
 958 {
 959         char *pos;
 960         char *attr;
 961
 962         attr = strchr(str, '{');
 963         if (attr != NULL) {
 964                 attr++;
 965                 pos = strchr(attr, '}');
 966                 if (pos == NULL) {
 967                         err(udev, "missing closing brace for format\n");
 968                         return NULL;
 969                 }
 970                 pos[0] = '\0';
 971                 dbg(udev, "attribute='%s'\n", attr);
 972                 return attr;
 973         }
 974         return NULL;
 975 }
 976
 977 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
 978                         enum operation_type op,
 979                         const char *value, const void *data)
 980 {
 981         struct token *token = &rule_tmp->token[rule_tmp->token_cur];
 982         const char *attr = data;
 983         enum string_glob_type glob;
 984
 985         memset(token, 0x00, sizeof(struct token));
 986
 987         switch (type) {
 988         case TK_M_ACTION:
 989         case TK_M_DEVPATH:
 990         case TK_M_KERNEL:
 991         case TK_M_SUBSYSTEM:
 992         case TK_M_DRIVER:
 993         case TK_M_WAITFOR:
 994         case TK_M_DEVLINK:
 995         case TK_M_NAME:
 996         case TK_M_KERNELS:
 997         case TK_M_SUBSYSTEMS:
 998         case TK_M_DRIVERS:
 999         case TK_M_PROGRAM:
1000         case TK_M_IMPORT_FILE:
1001         case TK_M_IMPORT_PROG:
1002         case TK_M_IMPORT_PARENT:
1003         case TK_M_RESULT:
1004         case TK_A_OWNER:
1005         case TK_A_GROUP:
1006         case TK_A_MODE:
1007         case TK_A_NAME:
1008         case TK_A_DEVLINK:
1009         case TK_A_GOTO:
1010                 token->key.value_off = add_string(rule_tmp->rules, value);
1011                 break;
1012         case TK_M_ENV:
1013         case TK_M_ATTR:
1014         case TK_M_ATTRS:
1015         case TK_A_ATTR:
1016         case TK_A_ENV:
1017                 token->key.value_off = add_string(rule_tmp->rules, value);
1018                 token->key.attr_off = add_string(rule_tmp->rules, attr);
1019                 break;
1020         case TK_M_TEST:
1021                 token->key.value_off = add_string(rule_tmp->rules, value);
1022                 if (data != NULL)
1023                         token->key.mode = *(mode_t *)data;
1024                 break;
1025         case TK_A_IGNORE_DEVICE:
1026         case TK_A_STRING_ESCAPE_NONE:
1027         case TK_A_STRING_ESCAPE_REPLACE:
1028         case TK_A_IGNORE_REMOVE:
1029         case TK_A_LAST_RULE:
1030                 break;
1031         case TK_A_RUN:
1032                 token->key.value_off = add_string(rule_tmp->rules, value);
1033                 token->key.ignore_error = *(int *)data;
1034                 break;
1035         case TK_A_INOTIFY_WATCH:
1036         case TK_A_NUM_FAKE_PART:
1037         case TK_A_DEVLINK_PRIO:
1038                 token->key.devlink_prio = *(int *)data;
1039                 break;
1040         case TK_A_OWNER_ID:
1041                 token->key.uid = *(uid_t *)data;
1042                 break;
1043         case TK_A_GROUP_ID:
1044                 token->key.gid = *(gid_t *)data;
1045                 break;
1046         case TK_A_MODE_ID:
1047                 token->key.mode = *(mode_t *)data;
1048                 break;
1049         case TK_A_EVENT_TIMEOUT:
1050                 token->key.event_timeout = *(int *)data;
1051                 break;
1052         case TK_RULE:
1053         case TK_M_PARENTS_MIN:
1054         case TK_M_PARENTS_MAX:
1055         case TK_M_MAX:
1056         case TK_END:
1057         case TK_UNSET:
1058                 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1059                 return -1;
1060         }
1061
1062         glob = GL_PLAIN;
1063         if (value != NULL) {
1064                 if (type < TK_M_MAX) {
1065                         /* check if we need to split or call fnmatch() while matching rules */
1066                         int has_split;
1067                         int has_glob;
1068
1069                         has_split = (strchr(value, '|') != NULL);
1070                         has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||
1071                                     strchr(value, '[') != NULL || strchr(value, ']') != NULL);
1072                         if (has_split && has_glob) {
1073                                 glob = GL_SPLIT_GLOB;
1074                         } else if (has_split) {
1075                                 glob = GL_SPLIT;
1076                         } else if (has_glob) {
1077                                 if (strcmp(value, "?*") == 0)
1078                                         glob = GL_SOMETHING;
1079                                 else
1080                                         glob = GL_GLOB;
1081                         }
1082                 } else {
1083                         /* check if we need to substitute format strings for matching rules */
1084                         if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1085                                 glob = GL_FORMAT;
1086                 }
1087         }
1088
1089         token->key.type = type;
1090         token->key.op = op;
1091         token->key.glob = glob;
1092         rule_tmp->token_cur++;
1093         if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1094                 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1095                 return -1;
1096         }
1097         return 0;
1098 }
1099
1100 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1101 {
1102         unsigned int i;
1103         unsigned int start = 0;
1104         unsigned int end = rule_tmp->token_cur;
1105
1106         for (i = 0; i < rule_tmp->token_cur; i++) {
1107                 enum token_type next_val = TK_UNSET;
1108                 unsigned int next_idx;
1109                 unsigned int j;
1110
1111                 /* find smallest value */
1112                 for (j = start; j < end; j++) {
1113                         if (rule_tmp->token[j].type == TK_UNSET)
1114                                 continue;
1115                         if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1116                                 next_val = rule_tmp->token[j].type;
1117                                 next_idx = j;
1118                         }
1119                 }
1120
1121                 /* add token and mark done */
1122                 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1123                         return -1;
1124                 rule_tmp->token[next_idx].type = TK_UNSET;
1125
1126                 /* shrink range */
1127                 if (next_idx == start)
1128                         start++;
1129                 if (next_idx+1 == end)
1130                         end--;
1131         }
1132         return 0;
1133 }
1134
1135 static int add_rule(struct udev_rules *rules, char *line,
1136                     const char *filename, unsigned int filename_off, unsigned int lineno)
1137 {
1138         char *linepos;
1139         char *attr;
1140         struct rule_tmp rule_tmp;
1141
1142         memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1143         rule_tmp.rules = rules;
1144         rule_tmp.rule.type = TK_RULE;
1145         rule_tmp.rule.rule.filename_off = filename_off;
1146         rule_tmp.rule.rule.filename_line = lineno;
1147
1148         linepos = line;
1149         while (1) {
1150                 char *key;
1151                 char *value;
1152                 enum operation_type op;
1153
1154                 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1155                         break;
1156
1157                 if (strcasecmp(key, "ACTION") == 0) {
1158                         if (op > OP_MATCH_MAX) {
1159                                 err(rules->udev, "invalid ACTION operation\n");
1160                                 goto invalid;
1161                         }
1162                         rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1163                         continue;
1164                 }
1165
1166                 if (strcasecmp(key, "DEVPATH") == 0) {
1167                         if (op > OP_MATCH_MAX) {
1168                                 err(rules->udev, "invalid DEVPATH operation\n");
1169                                 goto invalid;
1170                         }
1171                         rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1172                         continue;
1173                 }
1174
1175                 if (strcasecmp(key, "KERNEL") == 0) {
1176                         if (op > OP_MATCH_MAX) {
1177                                 err(rules->udev, "invalid KERNEL operation\n");
1178                                 goto invalid;
1179                         }
1180                         rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1181                         continue;
1182                 }
1183
1184                 if (strcasecmp(key, "SUBSYSTEM") == 0) {
1185                         if (op > OP_MATCH_MAX) {
1186                                 err(rules->udev, "invalid SUBSYSTEM operation\n");
1187                                 goto invalid;
1188                         }
1189                         /* bus, class, subsystem events should all be the same */
1190                         if (strcmp(value, "subsystem") == 0 ||
1191                             strcmp(value, "bus") == 0 ||
1192                             strcmp(value, "class") == 0) {
1193                                 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1194                                         err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1195                                             "please fix it in %s:%u", value, filename, lineno);
1196                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1197                         } else
1198                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1199                         continue;
1200                 }
1201
1202                 if (strcasecmp(key, "DRIVER") == 0) {
1203                         if (op > OP_MATCH_MAX) {
1204                                 err(rules->udev, "invalid DRIVER operation\n");
1205                                 goto invalid;
1206                         }
1207                         rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1208                         continue;
1209                 }
1210
1211                 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1212                         attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1213                         if (attr == NULL) {
1214                                 err(rules->udev, "error parsing ATTR attribute\n");
1215                                 goto invalid;
1216                         }
1217                         if (op < OP_MATCH_MAX) {
1218                                 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1219                         } else {
1220                                 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1221                         }
1222                         continue;
1223                 }
1224
1225                 if (strcasecmp(key, "KERNELS") == 0 ||
1226                     strcasecmp(key, "ID") == 0) {
1227                         if (op > OP_MATCH_MAX) {
1228                                 err(rules->udev, "invalid KERNELS operation\n");
1229                                 goto invalid;
1230                         }
1231                         rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1232                         continue;
1233                 }
1234
1235                 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
1236                     strcasecmp(key, "BUS") == 0) {
1237                         if (op > OP_MATCH_MAX) {
1238                                 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1239                                 goto invalid;
1240                         }
1241                         rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1242                         continue;
1243                 }
1244
1245                 if (strcasecmp(key, "DRIVERS") == 0) {
1246                         if (op > OP_MATCH_MAX) {
1247                                 err(rules->udev, "invalid DRIVERS operation\n");
1248                                 goto invalid;
1249                         }
1250                         rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1251                         continue;
1252                 }
1253
1254                 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1255                     strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1256                         if (op > OP_MATCH_MAX) {
1257                                 err(rules->udev, "invalid ATTRS operation\n");
1258                                 goto invalid;
1259                         }
1260                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1261                         if (attr == NULL) {
1262                                 err(rules->udev, "error parsing ATTRS attribute\n");
1263                                 goto invalid;
1264                         }
1265                         if (strncmp(attr, "device/", 7) == 0)
1266                                 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1267                                     "please fix it in %s:%u", filename, lineno);
1268                         else if (strstr(attr, "../") != NULL)
1269                                 err(rules->udev, "do not reference parent sysfs directories directly, "
1270                                     "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1271                         rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1272                         continue;
1273                 }
1274
1275                 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1276                         attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1277                         if (attr == NULL) {
1278                                 err(rules->udev, "error parsing ENV attribute\n");
1279                                 goto invalid;
1280                         }
1281                         if (op < OP_MATCH_MAX) {
1282                                 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1283                                         goto invalid;
1284                         } else {
1285                                 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1286                                         goto invalid;
1287                         }
1288                         continue;
1289                 }
1290
1291                 if (strcasecmp(key, "PROGRAM") == 0) {
1292                         rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1293                         continue;
1294                 }
1295
1296                 if (strcasecmp(key, "RESULT") == 0) {
1297                         if (op > OP_MATCH_MAX) {
1298                                 err(rules->udev, "invalid RESULT operation\n");
1299                                 goto invalid;
1300                         }
1301                         rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1302                         continue;
1303                 }
1304
1305                 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1306                         attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1307                         if (attr != NULL && strstr(attr, "program")) {
1308                                 dbg(rules->udev, "IMPORT will be executed\n");
1309                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1310                         } else if (attr != NULL && strstr(attr, "file")) {
1311                                 dbg(rules->udev, "IMPORT will be included as file\n");
1312                                 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1313                         } else if (attr != NULL && strstr(attr, "parent")) {
1314                                 dbg(rules->udev, "IMPORT will include the parent values\n");
1315                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1316                         } else {
1317                                 /* figure it out if it is executable */
1318                                 char file[UTIL_PATH_SIZE];
1319                                 char *pos;
1320                                 struct stat statbuf;
1321
1322                                 util_strlcpy(file, value, sizeof(file));
1323                                 pos = strchr(file, ' ');
1324                                 if (pos)
1325                                         pos[0] = '\0';
1326
1327                                 /* allow programs in /lib/udev called without the path */
1328                                 if (strchr(file, '/') == NULL) {
1329                                         util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));
1330                                         util_strlcat(file, value, sizeof(file));
1331                                         pos = strchr(file, ' ');
1332                                         if (pos)
1333                                                 pos[0] = '\0';
1334                                 }
1335
1336                                 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1337                                 if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
1338                                         dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1339                                         rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1340                                 } else {
1341                                         dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1342                                         rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1343                                 }
1344                         }
1345                         continue;
1346                 }
1347
1348                 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1349                         mode_t mode = 0;
1350
1351                         if (op > OP_MATCH_MAX) {
1352                                 err(rules->udev, "invalid TEST operation\n");
1353                                 goto invalid;
1354                         }
1355                         attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1356                         if (attr != NULL) {
1357                                 mode = strtol(attr, NULL, 8);
1358                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1359                         } else {
1360                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1361                         }
1362                         continue;
1363                 }
1364
1365                 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1366                         int flag = 0;
1367
1368                         attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1369                         if (attr != NULL && strstr(attr, "ignore_error"))
1370                                 flag = 1;
1371                         rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1372                         continue;
1373                 }
1374
1375                 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1376                         rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1377                         continue;
1378                 }
1379
1380                 if (strcasecmp(key, "LABEL") == 0) {
1381                         rule_tmp.rule.rule.label_off = add_string(rules, value);
1382                         continue;
1383                 }
1384
1385                 if (strcasecmp(key, "GOTO") == 0) {
1386                         rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1387                         continue;
1388                 }
1389
1390                 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1391                         if (op < OP_MATCH_MAX) {
1392                                 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1393                         } else {
1394                                 if (value[0] == '\0')
1395                                         info(rules->udev, "name empty, node creation suppressed\n");
1396                                 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1397                                 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1398                                 if (attr != NULL) {
1399                                         if (strstr(attr, "all_partitions") != NULL) {
1400                                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1401
1402                                                 dbg(rules->udev, "creation of partition nodes requested\n");
1403                                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1404                                         }
1405                                         if (strstr(attr, "ignore_remove") != NULL) {
1406                                                 dbg(rules->udev, "remove event should be ignored\n");
1407                                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1408                                         }
1409                                 }
1410                         }
1411                         rule_tmp.rule.rule.flags = 1;
1412                         continue;
1413                 }
1414
1415                 if (strcasecmp(key, "SYMLINK") == 0) {
1416                         if (op < OP_MATCH_MAX)
1417                                 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1418                         else
1419                                 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1420                         rule_tmp.rule.rule.flags = 1;
1421                         continue;
1422                 }
1423
1424                 if (strcasecmp(key, "OWNER") == 0) {
1425                         uid_t uid;
1426                         char *endptr;
1427
1428                         uid = strtoul(value, &endptr, 10);
1429                         if (endptr[0] == '\0') {
1430                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1431                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1432                                 uid = add_uid(rules, value);
1433                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1434                         } else if (rules->resolve_names >= 0) {
1435                                 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1436                         }
1437                         rule_tmp.rule.rule.flags = 1;
1438                         continue;
1439                 }
1440
1441                 if (strcasecmp(key, "GROUP") == 0) {
1442                         gid_t gid;
1443                         char *endptr;
1444
1445                         gid = strtoul(value, &endptr, 10);
1446                         if (endptr[0] == '\0') {
1447                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1448                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1449                                 gid = add_gid(rules, value);
1450                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1451                         } else if (rules->resolve_names >= 0) {
1452                                 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1453                         }
1454                         rule_tmp.rule.rule.flags = 1;
1455                         continue;
1456                 }
1457
1458                 if (strcasecmp(key, "MODE") == 0) {
1459                         mode_t mode;
1460                         char *endptr;
1461
1462                         mode = strtol(value, &endptr, 8);
1463                         if (endptr[0] == '\0')
1464                                 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1465                         else
1466                                 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1467                         rule_tmp.rule.rule.flags = 1;
1468                         continue;
1469                 }
1470
1471                 if (strcasecmp(key, "OPTIONS") == 0) {
1472                         const char *pos;
1473
1474                         if (strstr(value, "last_rule") != NULL) {
1475                                 dbg(rules->udev, "last rule to be applied\n");
1476                                 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1477                         }
1478                         if (strstr(value, "ignore_device") != NULL) {
1479                                 dbg(rules->udev, "device should be ignored\n");
1480                                 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1481                         }
1482                         if (strstr(value, "ignore_remove") != NULL) {
1483                                 dbg(rules->udev, "remove event should be ignored\n");
1484                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1485                         }
1486                         pos = strstr(value, "link_priority=");
1487                         if (pos != NULL) {
1488                                 int prio = atoi(&pos[strlen("link_priority=")]);
1489
1490                                 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1491                                 dbg(rules->udev, "link priority=%i\n", prio);
1492                         }
1493                         pos = strstr(value, "event_timeout=");
1494                         if (pos != NULL) {
1495                                 int tout = atoi(&pos[strlen("event_timeout=")]);
1496
1497                                 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1498                                 dbg(rules->udev, "event timout=%i\n", tout);
1499                         }
1500                         pos = strstr(value, "string_escape=");
1501                         if (pos != NULL) {
1502                                 pos = &pos[strlen("string_escape=")];
1503                                 if (strncmp(pos, "none", strlen("none")) == 0)
1504                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1505                                 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1506                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1507                         }
1508                         if (strstr(value, "all_partitions") != NULL) {
1509                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1510
1511                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1512                                 dbg(rules->udev, "creation of partition nodes requested\n");
1513                         }
1514                         pos = strstr(value, "nowatch");
1515                         if (pos != NULL) {
1516                                 const int off = 0;
1517
1518                                 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &off);
1519                                 dbg(rules->udev, "inotify watch of device disabled\n");
1520                         } else {
1521                                 pos = strstr(value, "watch");
1522                                 if (pos != NULL) {
1523                                         const int on = 1;
1524
1525                                         rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &on);
1526                                         dbg(rules->udev, "inotify watch of device requested\n");
1527                                 }
1528                         }
1529                         continue;
1530                 }
1531                 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1532         }
1533
1534         /* add rule token */
1535         rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1536         if (add_token(rules, &rule_tmp.rule) != 0)
1537                 goto invalid;
1538
1539         /* add tokens to list, sorted by type */
1540         if (sort_token(rules, &rule_tmp) != 0)
1541                 goto invalid;
1542
1543         return 0;
1544 invalid:
1545         err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1546         return -1;
1547 }
1548
1549 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1550 {
1551         FILE *f;
1552         unsigned int first_token;
1553         char line[UTIL_LINE_SIZE];
1554         int line_nr = 0;
1555         unsigned int i;
1556
1557         info(rules->udev, "reading '%s' as rules file\n", filename);
1558
1559         f = fopen(filename, "r");
1560         if (f == NULL)
1561                 return -1;
1562
1563         first_token = rules->token_cur;
1564
1565         while(fgets(line, sizeof(line), f) != NULL) {
1566                 char *key;
1567                 size_t len;
1568
1569                 /* skip whitespace */
1570                 line_nr++;
1571                 key = line;
1572                 while (isspace(key[0]))
1573                         key++;
1574
1575                 /* comment */
1576                 if (key[0] == '#')
1577                         continue;
1578
1579                 len = strlen(line);
1580                 if (len < 3)
1581                         continue;
1582
1583                 /* continue reading if backslash+newline is found */
1584                 while (line[len-2] == '\\') {
1585                         if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1586                                 break;
1587                         line_nr++;
1588                         len = strlen(line);
1589                 }
1590
1591                 if (len+1 >= sizeof(line)) {
1592                         err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1593                         continue;
1594                 }
1595                 add_rule(rules, key, filename, filename_off, line_nr);
1596         }
1597         fclose(f);
1598
1599         /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1600         for (i = first_token+1; i < rules->token_cur; i++) {
1601                 if (rules->tokens[i].type == TK_A_GOTO) {
1602                         char *label = &rules->buf[rules->tokens[i].key.value_off];
1603                         unsigned int j;
1604
1605                         for (j = i+1; j < rules->token_cur; j++) {
1606                                 if (rules->tokens[j].type != TK_RULE)
1607                                         continue;
1608                                 if (rules->tokens[j].rule.label_off == 0)
1609                                         continue;
1610                                 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1611                                         continue;
1612                                 rules->tokens[i].key.rule_goto = j;
1613                                 break;
1614                         }
1615                         if (rules->tokens[i].key.rule_goto == 0)
1616                                 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1617                 }
1618         }
1619         return 0;
1620 }
1621
1622 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1623 {
1624         DIR *dir;
1625         char filename[UTIL_PATH_SIZE];
1626
1627         dbg(udev, "open directory '%s'\n", dirname);
1628         dir = opendir(dirname);
1629         if (dir == NULL) {
1630                 info(udev, "unable to open '%s': %m\n", dirname);
1631                 return -1;
1632         }
1633
1634         while (1) {
1635                 struct dirent *dent;
1636
1637                 dent = readdir(dir);
1638                 if (dent == NULL || dent->d_name[0] == '\0')
1639                         break;
1640
1641                 if (dent->d_name[0] == '.')
1642                         continue;
1643
1644                 /* look for file matching with specified suffix */
1645                 if (suffix != NULL) {
1646                         const char *ext;
1647
1648                         ext = strrchr(dent->d_name, '.');
1649                         if (ext == NULL)
1650                                 continue;
1651                         if (strcmp(ext, suffix) != 0)
1652                                 continue;
1653                 }
1654                 dbg(udev, "put file '%s/%s' into list\n", dirname, dent->d_name);
1655
1656                 snprintf(filename, sizeof(filename), "%s/%s", dirname, dent->d_name);
1657                 filename[sizeof(filename)-1] = '\0';
1658                 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1659         }
1660
1661         closedir(dir);
1662         return 0;
1663 }
1664
1665 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1666 {
1667         struct udev_rules *rules;
1668         struct stat statbuf;
1669         struct udev_list_node file_list;
1670         struct udev_list_entry *file_loop, *file_tmp;
1671         struct token end_token;
1672
1673         rules = malloc(sizeof(struct udev_rules));
1674         if (rules == NULL)
1675                 return NULL;
1676         memset(rules, 0x00, sizeof(struct udev_rules));
1677         rules->udev = udev;
1678         rules->resolve_names = resolve_names;
1679         udev_list_init(&file_list);
1680
1681         /* init token array and string buffer */
1682         rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1683         if (rules->tokens == NULL)
1684                 return NULL;
1685         rules->token_max = PREALLOC_TOKEN;
1686
1687         rules->buf = malloc(PREALLOC_STRBUF);
1688         if (rules->buf == NULL)
1689                 return NULL;
1690         rules->buf_max = PREALLOC_STRBUF;
1691         /* offset 0 is always '\0' */
1692         rules->buf[0] = '\0';
1693         rules->buf_cur = 1;
1694         dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1695             rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1696
1697         rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1698         if (rules->trie_nodes == NULL)
1699                 return NULL;
1700         rules->trie_nodes_max = PREALLOC_TRIE;
1701         /* offset 0 is the trie root, with an empty string */
1702         memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1703         rules->trie_nodes_cur = 1;
1704
1705         if (udev_get_rules_path(udev) != NULL) {
1706                 /* custom rules location for testing */
1707                 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1708         } else {
1709                 char filename[PATH_MAX];
1710                 struct udev_list_node sort_list;
1711                 struct udev_list_entry *sort_loop, *sort_tmp;
1712
1713                 /* read user/custom rules */
1714                 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1715
1716                 /* read dynamic/temporary rules */
1717                 util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
1718                 util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
1719                 if (stat(filename, &statbuf) != 0) {
1720                         util_create_path(udev, filename);
1721                         udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1722                         mkdir(filename, 0755);
1723                         udev_selinux_resetfscreatecon(udev);
1724                 }
1725                 udev_list_init(&sort_list);
1726                 add_matching_files(udev, &sort_list, filename, ".rules");
1727
1728                 /* read default rules */
1729                 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1730
1731                 /* sort all rules files by basename into list of files */
1732                 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1733                         const char *sort_name = udev_list_entry_get_name(sort_loop);
1734                         const char *sort_base = strrchr(sort_name, '/');
1735
1736                         if (sort_base == NULL)
1737                                 continue;
1738                         /* sort entry into existing list */
1739                         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1740                                 const char *file_name = udev_list_entry_get_name(file_loop);
1741                                 const char *file_base = strrchr(file_name, '/');
1742
1743                                 if (file_base == NULL)
1744                                         continue;
1745                                 if (strcmp(file_base, sort_base) == 0) {
1746                                         info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1747                                              file_name, sort_name);
1748                                         udev_list_entry_delete(sort_loop);
1749                                         sort_loop = NULL;
1750                                         break;
1751                                 }
1752                                 if (strcmp(file_base, sort_base) > 0) {
1753                                         /* found later file, insert before */
1754                                         udev_list_entry_remove(sort_loop);
1755                                         udev_list_entry_insert_before(sort_loop, file_loop);
1756                                         sort_loop = NULL;
1757                                         break;
1758                                 }
1759                         }
1760                         /* current file already handled */
1761                         if (sort_loop == NULL)
1762                                 continue;
1763                         /* no later file, append to end of list */
1764                         udev_list_entry_remove(sort_loop);
1765                         udev_list_entry_append(sort_loop, &file_list);
1766                 }
1767         }
1768
1769         /* add all filenames to the string buffer */
1770         udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1771                 const char *filename = udev_list_entry_get_name(file_loop);
1772                 unsigned int filename_off;
1773
1774                 filename_off = add_string(rules, filename);
1775                 /* the offset in the rule is limited to unsigned short */
1776                 if (filename_off < USHRT_MAX)
1777                         udev_list_entry_set_flag(file_loop, filename_off);
1778         }
1779
1780         /* parse list of files */
1781         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1782                 const char *filename = udev_list_entry_get_name(file_loop);
1783                 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1784
1785                 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1786                         parse_file(rules, filename, filename_off);
1787                 else
1788                         info(udev, "can not read '%s'\n", filename);
1789                 udev_list_entry_delete(file_loop);
1790         }
1791
1792         memset(&end_token, 0x00, sizeof(struct token));
1793         end_token.type = TK_END;
1794         add_token(rules, &end_token);
1795
1796         /* shrink allocated token and string buffer */
1797         if (rules->token_cur < rules->token_max) {
1798                 struct token *tokens;
1799
1800                 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1801                 if (tokens != NULL || rules->token_cur == 0) {
1802                         rules->tokens = tokens;
1803                         rules->token_max = rules->token_cur;
1804                 }
1805         }
1806         if (rules->buf_cur < rules->buf_max) {
1807                 char *buf;
1808
1809                 buf = realloc(rules->buf, rules->buf_cur);
1810                 if (buf != NULL || rules->buf_cur == 0) {
1811                         rules->buf = buf;
1812                         rules->buf_max = rules->buf_cur;
1813                 }
1814         }
1815         info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1816              rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1817         info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1818              rules->trie_nodes_cur * sizeof(struct trie_node),
1819              rules->trie_nodes_cur, sizeof(struct trie_node));
1820
1821         /* cleanup trie */
1822         free(rules->trie_nodes);
1823         rules->trie_nodes = NULL;
1824         rules->trie_nodes_cur = 0;
1825         rules->trie_nodes_max = 0;
1826
1827         /* cleanup uid/gid cache */
1828         free(rules->uids);
1829         rules->uids = NULL;
1830         rules->uids_cur = 0;
1831         rules->uids_max = 0;
1832         free(rules->gids);
1833         rules->gids = NULL;
1834         rules->gids_cur = 0;
1835         rules->gids_max = 0;
1836
1837         dump_rules(rules);
1838         return rules;
1839 }
1840
1841 void udev_rules_unref(struct udev_rules *rules)
1842 {
1843         if (rules == NULL)
1844                 return;
1845         free(rules->tokens);
1846         free(rules->buf);
1847         free(rules->trie_nodes);
1848         free(rules->uids);
1849         free(rules->gids);
1850         free(rules);
1851 }
1852
1853 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1854 {
1855         char *key_value = &rules->buf[token->key.value_off];
1856         char *pos;
1857         int match = 0;
1858
1859         if (val == NULL)
1860                 val = "";
1861
1862         switch (token->key.glob) {
1863         case GL_PLAIN:
1864                 match = (strcmp(key_value, val) == 0);
1865                 break;
1866         case GL_GLOB:
1867                 match = (fnmatch(key_value, val, 0) == 0);
1868                 break;
1869         case GL_SPLIT:
1870                 {
1871                         const char *split;
1872                         size_t len;
1873
1874                         split = &rules->buf[token->key.value_off];
1875                         len = strlen(val);
1876                         while (1) {
1877                                 const char *next;
1878
1879                                 next = strchr(split, '|');
1880                                 if (next != NULL) {
1881                                         size_t matchlen = (size_t)(next - split);
1882
1883                                         match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1884                                         if (match)
1885                                                 break;
1886                                 } else {
1887                                         match = (strcmp(split, val) == 0);
1888                                         break;
1889                                 }
1890                                 split = &next[1];
1891                         }
1892                         break;
1893                 }
1894         case GL_SPLIT_GLOB:
1895                 {
1896                         char value[UTIL_PATH_SIZE];
1897
1898                         util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value));
1899                         key_value = value;
1900                         while (key_value != NULL) {
1901                                 pos = strchr(key_value, '|');
1902                                 if (pos != NULL) {
1903                                         pos[0] = '\0';
1904                                         pos = &pos[1];
1905                                 }
1906                                 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1907                                 match = (fnmatch(key_value, val, 0) == 0);
1908                                 if (match)
1909                                         break;
1910                                 key_value = pos;
1911                         }
1912                         break;
1913                 }
1914         case GL_SOMETHING:
1915                 match = (val[0] != '\0');
1916                 break;
1917         case GL_FORMAT:
1918         case GL_UNSET:
1919                 return -1;
1920         }
1921
1922         if (match && (token->key.op == OP_MATCH)) {
1923                 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1924                 return 0;
1925         }
1926         if (!match && (token->key.op == OP_NOMATCH)) {
1927                 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1928                 return 0;
1929         }
1930         dbg(rules->udev, "%s is not true\n", token_str(token->type));
1931         return -1;
1932 }
1933
1934 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1935 {
1936         const char *key_name = &rules->buf[cur->key.attr_off];
1937         const char *key_value = &rules->buf[cur->key.value_off];
1938         char value[UTIL_NAME_SIZE];
1939         size_t len;
1940
1941         value[0] = '\0';
1942         if (key_name[0] == '[') {
1943                 char attr[UTIL_PATH_SIZE];
1944
1945                 util_strlcpy(attr, key_name, sizeof(attr));
1946                 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
1947         }
1948         if (value[0] == '\0') {
1949                 const char *val;
1950
1951                 val = udev_device_get_sysattr_value(dev, key_name);
1952                 if (val == NULL)
1953                         return -1;
1954                 util_strlcpy(value, val, sizeof(value));
1955         }
1956
1957         /* strip trailing whitespace of value, if not asked to match for it */
1958         len = strlen(key_value);
1959         if (len > 0 && !isspace(key_value[len-1])) {
1960                 len = strlen(value);
1961                 while (len > 0 && isspace(value[--len]))
1962                         value[len] = '\0';
1963                 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1964         }
1965         return match_key(rules, cur, value);
1966 }
1967
1968 enum escape_type {
1969         ESCAPE_UNSET,
1970         ESCAPE_NONE,
1971         ESCAPE_REPLACE,
1972 };
1973
1974 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
1975 {
1976         struct token *cur;
1977         struct token *rule;
1978         enum escape_type esc = ESCAPE_UNSET;
1979         int can_set_name;
1980
1981         if (rules->tokens == NULL)
1982                 return -1;
1983
1984         can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
1985                          strcmp(udev_device_get_action(event->dev), "change") == 0) &&
1986                         (major(udev_device_get_devnum(event->dev)) > 0 ||
1987                          strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
1988
1989         /* loop through token list, match, run actions or forward to next rule */
1990         cur = &rules->tokens[0];
1991         rule = cur;
1992         while (1) {
1993                 dump_token(rules, cur);
1994                 switch (cur->type) {
1995                 case TK_RULE:
1996                         /* current rule */
1997                         rule = cur;
1998                         /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1999                         if (!can_set_name && rule->rule.flags)
2000                                 goto nomatch;
2001                         esc = ESCAPE_UNSET;
2002                         break;
2003                 case TK_M_ACTION:
2004                         if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2005                                 goto nomatch;
2006                         break;
2007                 case TK_M_DEVPATH:
2008                         if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2009                                 goto nomatch;
2010                         break;
2011                 case TK_M_KERNEL:
2012                         if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2013                                 goto nomatch;
2014                         break;
2015                 case TK_M_DEVLINK:
2016                         {
2017                                 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2018                                 struct udev_list_entry *list_entry;
2019                                 int match = 0;
2020
2021                                 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2022                                         const char *devlink;
2023
2024                                         devlink =  &udev_list_entry_get_name(list_entry)[devlen];
2025                                         if (match_key(rules, cur, devlink) == 0) {
2026                                                 match = 1;
2027                                                 break;
2028                                         }
2029                                 }
2030                                 if (!match)
2031                                         goto nomatch;
2032                                 break;
2033                         }
2034                 case TK_M_NAME:
2035                         if (match_key(rules, cur, event->name) != 0)
2036                                 goto nomatch;
2037                         break;
2038                 case TK_M_ENV:
2039                         {
2040                                 const char *key_name = &rules->buf[cur->key.attr_off];
2041                                 const char *value;
2042
2043                                 value = udev_device_get_property_value(event->dev, key_name);
2044                                 if (value == NULL) {
2045                                         dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2046                                         value = "";
2047                                 }
2048                                 if (match_key(rules, cur, value))
2049                                         goto nomatch;
2050                                 break;
2051                         }
2052                 case TK_M_SUBSYSTEM:
2053                         if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2054                                 goto nomatch;
2055                         break;
2056                 case TK_M_DRIVER:
2057                         if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2058                                 goto nomatch;
2059                         break;
2060                 case TK_M_WAITFOR:
2061                         {
2062                                 char filename[UTIL_PATH_SIZE];
2063                                 int found;
2064
2065                                 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2066                                 udev_event_apply_format(event, filename, sizeof(filename));
2067                                 found = (wait_for_file(event->dev, filename, 10) == 0);
2068                                 if (!found && (cur->key.op != OP_NOMATCH))
2069                                         goto nomatch;
2070                                 break;
2071                         }
2072                 case TK_M_ATTR:
2073                         if (match_attr(rules, event->dev, event, cur) != 0)
2074                                 goto nomatch;
2075                         break;
2076                 case TK_M_KERNELS:
2077                 case TK_M_SUBSYSTEMS:
2078                 case TK_M_DRIVERS:
2079                 case TK_M_ATTRS:
2080                         {
2081                                 struct token *next;
2082
2083                                 /* get whole sequence of parent matches */
2084                                 next = cur;
2085                                 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2086                                         next++;
2087
2088                                 /* loop over parents */
2089                                 event->dev_parent = event->dev;
2090                                 while (1) {
2091                                         struct token *key;
2092
2093                                         dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2094                                         /* loop over sequence of parent match keys */
2095                                         for (key = cur; key < next; key++ ) {
2096                                                 dump_token(rules, key);
2097                                                 switch(key->type) {
2098                                                 case TK_M_KERNELS:
2099                                                         if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2100                                                                 goto try_parent;
2101                                                         break;
2102                                                 case TK_M_SUBSYSTEMS:
2103                                                         if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2104                                                                 goto try_parent;
2105                                                         break;
2106                                                 case TK_M_DRIVERS:
2107                                                         if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2108                                                                 goto try_parent;
2109                                                         break;
2110                                                 case TK_M_ATTRS:
2111                                                         if (match_attr(rules, event->dev_parent, event, key) != 0)
2112                                                                 goto try_parent;
2113                                                         break;
2114                                                 default:
2115                                                         goto nomatch;
2116                                                 }
2117                                                 dbg(event->udev, "parent key matched\n");
2118                                         }
2119                                         dbg(event->udev, "all parent keys matched\n");
2120                                         /* all keys matched */
2121                                         break;
2122
2123                                 try_parent:
2124                                         event->dev_parent = udev_device_get_parent(event->dev_parent);
2125                                         if (event->dev_parent == NULL)
2126                                                 goto nomatch;
2127                                 }
2128                                 /* move behind our sequence of parent match keys */
2129                                 cur = next;
2130                                 continue;
2131                         }
2132                 case TK_M_TEST:
2133                         {
2134                                 char filename[UTIL_PATH_SIZE];
2135                                 struct stat statbuf;
2136                                 int match;
2137
2138                                 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2139                                 udev_event_apply_format(event, filename, sizeof(filename));
2140                                 if (util_resolve_subsys_kernel(event->udev, NULL, filename, sizeof(filename), 0) != 0)
2141                                         if (filename[0] != '/') {
2142                                                 char tmp[UTIL_PATH_SIZE];
2143
2144                                                 util_strlcpy(tmp, udev_device_get_syspath(event->dev), sizeof(tmp));
2145                                                 util_strlcat(tmp, "/", sizeof(tmp));
2146                                                 util_strlcat(tmp, filename, sizeof(tmp));
2147                                                 util_strlcpy(filename, tmp, sizeof(filename));
2148                                         }
2149
2150                                 attr_subst_subdir(filename, sizeof(filename));
2151
2152                                 match = (stat(filename, &statbuf) == 0);
2153                                 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2154                                 if (match && cur->key.mode > 0) {
2155                                         match = ((statbuf.st_mode & cur->key.mode) > 0);
2156                                         dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2157                                             match ? "matches" : "does not match", cur->key.mode);
2158                                 }
2159                                 if (match && cur->key.op == OP_NOMATCH)
2160                                         goto nomatch;
2161                                 if (!match && cur->key.op == OP_MATCH)
2162                                         goto nomatch;
2163                                 break;
2164                         }
2165                 case TK_M_PROGRAM:
2166                         {
2167                                 char program[UTIL_PATH_SIZE];
2168                                 char **envp;
2169                                 char result[UTIL_PATH_SIZE];
2170
2171                                 free(event->program_result);
2172                                 event->program_result = NULL;
2173                                 util_strlcpy(program, &rules->buf[cur->key.value_off], sizeof(program));
2174                                 udev_event_apply_format(event, program, sizeof(program));
2175                                 envp = udev_device_get_properties_envp(event->dev);
2176                                 info(event->udev, "PROGRAM '%s' %s:%u\n",
2177                                      program,
2178                                      &rules->buf[rule->rule.filename_off],
2179                                      rule->rule.filename_line);
2180                                 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2181                                         if (cur->key.op != OP_NOMATCH)
2182                                                 goto nomatch;
2183                                 } else {
2184                                         int count;
2185
2186                                         util_remove_trailing_chars(result, '\n');
2187                                         if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2188                                                 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2189                                                 if (count > 0)
2190                                                         info(event->udev, "%i character(s) replaced\n" , count);
2191                                         }
2192                                         event->program_result = strdup(result);
2193                                         dbg(event->udev, "storing result '%s'\n", event->program_result);
2194                                         if (cur->key.op == OP_NOMATCH)
2195                                                 goto nomatch;
2196                                 }
2197                                 break;
2198                         }
2199                 case TK_M_IMPORT_FILE:
2200                         {
2201                                 char import[UTIL_PATH_SIZE];
2202
2203                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2204                                 udev_event_apply_format(event, import, sizeof(import));
2205                                 if (import_file_into_properties(event->dev, import) != 0)
2206                                         if (cur->key.op != OP_NOMATCH)
2207                                                 goto nomatch;
2208                                 break;
2209                         }
2210                 case TK_M_IMPORT_PROG:
2211                         {
2212                                 char import[UTIL_PATH_SIZE];
2213
2214                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2215                                 udev_event_apply_format(event, import, sizeof(import));
2216                                 info(event->udev, "IMPORT '%s' %s:%u\n",
2217                                      import,
2218                                      &rules->buf[rule->rule.filename_off],
2219                                      rule->rule.filename_line);
2220                                 if (import_program_into_properties(event->dev, import) != 0)
2221                                         if (cur->key.op != OP_NOMATCH)
2222                                                 goto nomatch;
2223                                 break;
2224                         }
2225                 case TK_M_IMPORT_PARENT:
2226                         {
2227                                 char import[UTIL_PATH_SIZE];
2228
2229                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2230                                 udev_event_apply_format(event, import, sizeof(import));
2231                                 if (import_parent_into_properties(event->dev, import) != 0)
2232                                         if (cur->key.op != OP_NOMATCH)
2233                                                 goto nomatch;
2234                                 break;
2235                         }
2236                 case TK_M_RESULT:
2237                         if (match_key(rules, cur, event->program_result) != 0)
2238                                 goto nomatch;
2239                         break;
2240
2241                 case TK_A_IGNORE_DEVICE:
2242                         event->ignore_device = 1;
2243                         return 0;
2244                         break;
2245                 case TK_A_STRING_ESCAPE_NONE:
2246                         esc = ESCAPE_NONE;
2247                         break;
2248                 case TK_A_STRING_ESCAPE_REPLACE:
2249                         esc = ESCAPE_REPLACE;
2250                         break;
2251                 case TK_A_NUM_FAKE_PART:
2252                         if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2253                                 break;
2254                         if (udev_device_get_sysnum(event->dev) != NULL)
2255                                 break;
2256                         udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2257                         break;
2258                 case TK_A_INOTIFY_WATCH:
2259                         event->inotify_watch = cur->key.watch;
2260                         break;
2261                 case TK_A_DEVLINK_PRIO:
2262                         udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2263                         break;
2264                 case TK_A_OWNER:
2265                         {
2266                                 char owner[UTIL_NAME_SIZE];
2267
2268                                 if (event->owner_final)
2269                                         break;
2270                                 if (cur->key.op == OP_ASSIGN_FINAL)
2271                                         event->owner_final = 1;
2272                                 util_strlcpy(owner,  &rules->buf[cur->key.value_off], sizeof(owner));
2273                                 udev_event_apply_format(event, owner, sizeof(owner));
2274                                 event->uid = util_lookup_user(event->udev, owner);
2275                                 info(event->udev, "OWNER %u %s:%u\n",
2276                                      event->uid,
2277                                      &rules->buf[rule->rule.filename_off],
2278                                      rule->rule.filename_line);
2279                                 break;
2280                         }
2281                 case TK_A_GROUP:
2282                         {
2283                                 char group[UTIL_NAME_SIZE];
2284
2285                                 if (event->group_final)
2286                                         break;
2287                                 if (cur->key.op == OP_ASSIGN_FINAL)
2288                                         event->group_final = 1;
2289                                 util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group));
2290                                 udev_event_apply_format(event, group, sizeof(group));
2291                                 event->gid = util_lookup_group(event->udev, group);
2292                                 info(event->udev, "GROUP %u %s:%u\n",
2293                                      event->gid,
2294                                      &rules->buf[rule->rule.filename_off],
2295                                      rule->rule.filename_line);
2296                                 break;
2297                         }
2298                 case TK_A_MODE:
2299                         {
2300                                 char mode[UTIL_NAME_SIZE];
2301                                 char *endptr;
2302
2303                                 if (event->mode_final)
2304                                         break;
2305                                 if (cur->key.op == OP_ASSIGN_FINAL)
2306                                         event->mode_final = 1;
2307                                 util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode));
2308                                 udev_event_apply_format(event, mode, sizeof(mode));
2309                                 event->mode = strtol(mode, &endptr, 8);
2310                                 if (endptr[0] != '\0') {
2311                                         err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2312                                         event->mode = 0660;
2313                                 }
2314                                 info(event->udev, "MODE %#o %s:%u\n",
2315                                      event->mode,
2316                                      &rules->buf[rule->rule.filename_off],
2317                                      rule->rule.filename_line);
2318                                 break;
2319                         }
2320                 case TK_A_OWNER_ID:
2321                         if (event->owner_final)
2322                                 break;
2323                         if (cur->key.op == OP_ASSIGN_FINAL)
2324                                 event->owner_final = 1;
2325                         event->uid = cur->key.uid;
2326                         info(event->udev, "OWNER %u %s:%u\n",
2327                              event->uid,
2328                              &rules->buf[rule->rule.filename_off],
2329                              rule->rule.filename_line);
2330                         break;
2331                 case TK_A_GROUP_ID:
2332                         if (event->group_final)
2333                                 break;
2334                         if (cur->key.op == OP_ASSIGN_FINAL)
2335                                 event->group_final = 1;
2336                         event->gid = cur->key.gid;
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                 case TK_A_MODE_ID:
2343                         if (event->mode_final)
2344                                 break;
2345                         if (cur->key.op == OP_ASSIGN_FINAL)
2346                                 event->mode_final = 1;
2347                         event->mode = cur->key.mode;
2348                         info(event->udev, "MODE %#o %s:%u\n",
2349                              event->mode,
2350                              &rules->buf[rule->rule.filename_off],
2351                              rule->rule.filename_line);
2352                         break;
2353                 case TK_A_ENV:
2354                         {
2355                                 const char *name = &rules->buf[cur->key.attr_off];
2356                                 char *value = &rules->buf[cur->key.value_off];
2357
2358                                 if (value[0] != '\0') {
2359                                         char temp_value[UTIL_NAME_SIZE];
2360                                         struct udev_list_entry *entry;
2361
2362                                         util_strlcpy(temp_value, value, sizeof(temp_value));
2363                                         udev_event_apply_format(event, temp_value, sizeof(temp_value));
2364                                         entry = udev_device_add_property(event->dev, name, temp_value);
2365                                         /* store in db */
2366                                         udev_list_entry_set_flag(entry, 1);
2367                                 } else {
2368                                         udev_device_add_property(event->dev, name, NULL);
2369                                 }
2370                                 break;
2371                         }
2372                 case TK_A_NAME:
2373                         {
2374                                 const char *name  = &rules->buf[cur->key.value_off];
2375                                 char name_str[UTIL_PATH_SIZE];
2376                                 int count;
2377
2378                                 if (event->name_final)
2379                                         break;
2380                                 if (cur->key.op == OP_ASSIGN_FINAL)
2381                                         event->name_final = 1;
2382                                 util_strlcpy(name_str, name, sizeof(name_str));
2383                                 udev_event_apply_format(event, name_str, sizeof(name_str));
2384                                 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2385                                         count = udev_util_replace_chars(name_str, "/");
2386                                         if (count > 0)
2387                                                 info(event->udev, "%i character(s) replaced\n", count);
2388                                 }
2389                                 free(event->name);
2390                                 event->name = strdup(name_str);
2391                                 info(event->udev, "NAME '%s' %s:%u\n",
2392                                      event->name,
2393                                      &rules->buf[rule->rule.filename_off],
2394                                      rule->rule.filename_line);
2395                                 break;
2396                         }
2397                 case TK_A_DEVLINK:
2398                         {
2399                                 char temp[UTIL_PATH_SIZE];
2400                                 char filename[UTIL_PATH_SIZE];
2401                                 char *pos, *next;
2402                                 int count = 0;
2403
2404                                 if (event->devlink_final)
2405                                         break;
2406                                 if (major(udev_device_get_devnum(event->dev)) == 0)
2407                                         break;
2408                                 if (cur->key.op == OP_ASSIGN_FINAL)
2409                                         event->devlink_final = 1;
2410                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2411                                         udev_device_cleanup_devlinks_list(event->dev);
2412
2413                                 /* allow  multiple symlinks separated by spaces */
2414                                 util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));
2415                                 udev_event_apply_format(event, temp, sizeof(temp));
2416                                 if (esc == ESCAPE_UNSET)
2417                                         count = udev_util_replace_chars(temp, "/ ");
2418                                 else if (esc == ESCAPE_REPLACE)
2419                                         count = udev_util_replace_chars(temp, "/");
2420                                 if (count > 0)
2421                                         info(event->udev, "%i character(s) replaced\n" , count);
2422                                 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2423                                 pos = temp;
2424                                 while (isspace(pos[0]))
2425                                         pos++;
2426                                 next = strchr(pos, ' ');
2427                                 while (next) {
2428                                         next[0] = '\0';
2429                                         info(event->udev, "LINK '%s' %s:%u\n",
2430                                              pos,
2431                                              &rules->buf[rule->rule.filename_off],
2432                                              rule->rule.filename_line);
2433                                         util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2434                                         util_strlcat(filename, "/", sizeof(filename));
2435                                         util_strlcat(filename, pos, sizeof(filename));
2436                                         udev_device_add_devlink(event->dev, filename);
2437                                         while (isspace(next[1]))
2438                                                 next++;
2439                                         pos = &next[1];
2440                                         next = strchr(pos, ' ');
2441                                 }
2442                                 if (pos[0] != '\0') {
2443                                         info(event->udev, "LINK '%s' %s:%u\n",
2444                                              pos,
2445                                              &rules->buf[rule->rule.filename_off],
2446                                              rule->rule.filename_line);
2447                                         util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2448                                         util_strlcat(filename, "/", sizeof(filename));
2449                                         util_strlcat(filename, pos, sizeof(filename));
2450                                         udev_device_add_devlink(event->dev, filename);
2451                                 }
2452                         }
2453                         break;
2454                 case TK_A_EVENT_TIMEOUT:
2455                         udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2456                         break;
2457                 case TK_A_IGNORE_REMOVE:
2458                         udev_device_set_ignore_remove(event->dev, 1);
2459                         break;
2460                 case TK_A_ATTR:
2461                         {
2462                                 const char *key_name = &rules->buf[cur->key.attr_off];
2463                                 char attr[UTIL_PATH_SIZE];
2464                                 char value[UTIL_NAME_SIZE];
2465                                 FILE *f;
2466
2467                                 util_strlcpy(attr, key_name, sizeof(attr));
2468                                 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) {
2469                                         util_strlcpy(attr, udev_device_get_syspath(event->dev), sizeof(attr));
2470                                         util_strlcat(attr, "/", sizeof(attr));
2471                                         util_strlcat(attr, key_name, sizeof(attr));
2472                                 }
2473
2474                                 attr_subst_subdir(attr, sizeof(attr));
2475
2476                                 util_strlcpy(value, &rules->buf[cur->key.value_off], sizeof(value));
2477                                 udev_event_apply_format(event, value, sizeof(value));
2478                                 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2479                                      &rules->buf[rule->rule.filename_off],
2480                                      rule->rule.filename_line);
2481                                 f = fopen(attr, "w");
2482                                 if (f != NULL) {
2483                                         if (fprintf(f, "%s", value) <= 0)
2484                                                 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2485                                         fclose(f);
2486                                 } else {
2487                                         err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2488                                 }
2489                                 break;
2490                         }
2491                 case TK_A_RUN:
2492                         {
2493                                 struct udev_list_entry *list_entry;
2494
2495                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2496                                         udev_list_cleanup_entries(event->udev, &event->run_list);
2497                                 info(event->udev, "RUN '%s' %s:%u\n",
2498                                      &rules->buf[cur->key.value_off],
2499                                      &rules->buf[rule->rule.filename_off],
2500                                      rule->rule.filename_line);
2501                                 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2502                                                                  &rules->buf[cur->key.value_off], NULL, 1, 0);
2503                                 if (cur->key.ignore_error)
2504                                         udev_list_entry_set_flag(list_entry, 1);
2505                                 break;
2506                         }
2507                 case TK_A_GOTO:
2508                         if (cur->key.rule_goto == 0)
2509                                 break;
2510                         cur = &rules->tokens[cur->key.rule_goto];
2511                         continue;
2512                 case TK_A_LAST_RULE:
2513                 case TK_END:
2514                         return 0;
2515
2516                 case TK_M_PARENTS_MIN:
2517                 case TK_M_PARENTS_MAX:
2518                 case TK_M_MAX:
2519                 case TK_UNSET:
2520                         err(rules->udev, "wrong type %u\n", cur->type);
2521                         goto nomatch;
2522                 }
2523
2524                 cur++;
2525                 continue;
2526         nomatch:
2527                 /* fast-forward to next rule */
2528                 cur = rule + rule->rule.token_count;
2529                 dbg(rules->udev, "forward to rule: %u\n",
2530                                  (unsigned int) (cur - rules->tokens));
2531         }
2532 }