udev/udev-rules.c

   1 /*
   2  * Copyright (C) 2003-2010 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 <stdbool.h>
  23 #include <string.h>
  24 #include <stdio.h>
  25 #include <fcntl.h>
  26 #include <ctype.h>
  27 #include <unistd.h>
  28 #include <errno.h>
  29 #include <dirent.h>
  30 #include <fnmatch.h>
  31 #include <time.h>
  32
  33 #include "udev.h"
  34
  35 #define PREALLOC_TOKEN                  2048
  36 #define PREALLOC_STRBUF                 32 * 1024
  37 #define PREALLOC_TRIE                   256
  38
  39 struct uid_gid {
  40         unsigned int name_off;
  41         union {
  42                 uid_t   uid;
  43                 gid_t   gid;
  44         };
  45 };
  46
  47 struct trie_node {
  48         /* this node's first child */
  49         unsigned int child_idx;
  50         /* the next child of our parent node's child list */
  51         unsigned int next_child_idx;
  52         /* this node's last child (shortcut for append) */
  53         unsigned int last_child_idx;
  54         unsigned int value_off;
  55         unsigned short value_len;
  56         unsigned char key;
  57 };
  58
  59 struct udev_rules {
  60         struct udev *udev;
  61         int resolve_names;
  62
  63         /* every key in the rules file becomes a token */
  64         struct token *tokens;
  65         unsigned int token_cur;
  66         unsigned int token_max;
  67
  68         /* all key strings are copied to a single string buffer */
  69         char *buf;
  70         size_t buf_cur;
  71         size_t buf_max;
  72         unsigned int buf_count;
  73
  74         /* during rule parsing, strings are indexed to find duplicates */
  75         struct trie_node *trie_nodes;
  76         unsigned int trie_nodes_cur;
  77         unsigned int trie_nodes_max;
  78
  79         /* during rule parsing, uid/gid lookup results are cached */
  80         struct uid_gid *uids;
  81         unsigned int uids_cur;
  82         unsigned int uids_max;
  83         struct uid_gid *gids;
  84         unsigned int gids_cur;
  85         unsigned int gids_max;
  86 };
  87
  88 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
  89 enum operation_type {
  90         OP_UNSET,
  91
  92         OP_MATCH,
  93         OP_NOMATCH,
  94         OP_MATCH_MAX,
  95
  96         OP_ADD,
  97         OP_ASSIGN,
  98         OP_ASSIGN_FINAL,
  99 };
 100
 101 enum string_glob_type {
 102         GL_UNSET,
 103         GL_PLAIN,                       /* no special chars */
 104         GL_GLOB,                        /* shell globs ?,*,[] */
 105         GL_SPLIT,                       /* multi-value A|B */
 106         GL_SPLIT_GLOB,                  /* multi-value with glob A*|B* */
 107         GL_SOMETHING,                   /* commonly used "?*" */
 108 };
 109
 110 enum string_subst_type {
 111         SB_UNSET,
 112         SB_NONE,
 113         SB_FORMAT,
 114         SB_SUBSYS,
 115 };
 116
 117 /* tokens of a rule are sorted/handled in this order */
 118 enum token_type {
 119         TK_UNSET,
 120         TK_RULE,
 121
 122         TK_M_ACTION,                    /* val */
 123         TK_M_DEVPATH,                   /* val */
 124         TK_M_KERNEL,                    /* val */
 125         TK_M_DEVLINK,                   /* val */
 126         TK_M_NAME,                      /* val */
 127         TK_M_ENV,                       /* val, attr */
 128         TK_M_SUBSYSTEM,                 /* val */
 129         TK_M_DRIVER,                    /* val */
 130         TK_M_WAITFOR,                   /* val */
 131         TK_M_ATTR,                      /* val, attr */
 132
 133         TK_M_PARENTS_MIN,
 134         TK_M_KERNELS,                   /* val */
 135         TK_M_SUBSYSTEMS,                /* val */
 136         TK_M_DRIVERS,                   /* val */
 137         TK_M_ATTRS,                     /* val, attr */
 138         TK_M_PARENTS_MAX,
 139
 140         TK_M_TEST,                      /* val, mode_t */
 141         TK_M_PROGRAM,                   /* val */
 142         TK_M_IMPORT_FILE,               /* val */
 143         TK_M_IMPORT_PROG,               /* val */
 144         TK_M_IMPORT_DB,                 /* val */
 145         TK_M_IMPORT_PARENT,             /* val */
 146         TK_M_RESULT,                    /* val */
 147         TK_M_MAX,
 148
 149         TK_A_STRING_ESCAPE_NONE,
 150         TK_A_STRING_ESCAPE_REPLACE,
 151         TK_A_INOTIFY_WATCH,             /* int */
 152         TK_A_DEVLINK_PRIO,              /* int */
 153         TK_A_OWNER,                     /* val */
 154         TK_A_GROUP,                     /* val */
 155         TK_A_MODE,                      /* val */
 156         TK_A_OWNER_ID,                  /* uid_t */
 157         TK_A_GROUP_ID,                  /* gid_t */
 158         TK_A_MODE_ID,                   /* mode_t */
 159         TK_A_ENV,                       /* val, attr */
 160         TK_A_NAME,                      /* val */
 161         TK_A_DEVLINK,                   /* val */
 162         TK_A_EVENT_TIMEOUT,             /* int */
 163         TK_A_ATTR,                      /* val, attr */
 164         TK_A_RUN,                       /* val, bool */
 165         TK_A_GOTO,                      /* size_t */
 166
 167         TK_END,
 168 };
 169
 170 /* we try to pack stuff in a way that we take only 12 bytes per token */
 171 struct token {
 172         union {
 173                 unsigned char type;             /* same as in rule and key */
 174                 struct {
 175                         enum token_type type:8;
 176                         unsigned int flags:8;
 177                         unsigned short token_count;
 178                         unsigned int label_off;
 179                         unsigned short filename_off;
 180                         unsigned short filename_line;
 181                 } rule;
 182                 struct {
 183                         enum token_type type:8;
 184                         enum operation_type op:8;
 185                         enum string_glob_type glob:8;
 186                         enum string_subst_type subst:4;
 187                         enum string_subst_type attrsubst:4;
 188                         unsigned int value_off;
 189                         union {
 190                                 unsigned int attr_off;
 191                                 int devlink_unique;
 192                                 int fail_on_error;
 193                                 unsigned int rule_goto;
 194                                 mode_t  mode;
 195                                 uid_t uid;
 196                                 gid_t gid;
 197                                 int devlink_prio;
 198                                 int event_timeout;
 199                                 int watch;
 200                         };
 201                 } key;
 202         };
 203 };
 204
 205 #define MAX_TK          64
 206 struct rule_tmp {
 207         struct udev_rules *rules;
 208         struct token rule;
 209         struct token token[MAX_TK];
 210         unsigned int token_cur;
 211 };
 212
 213 #ifdef ENABLE_DEBUG
 214 static const char *operation_str(enum operation_type type)
 215 {
 216         static const char *operation_strs[] = {
 217                 [OP_UNSET] =            "UNSET",
 218                 [OP_MATCH] =            "match",
 219                 [OP_NOMATCH] =          "nomatch",
 220                 [OP_MATCH_MAX] =        "MATCH_MAX",
 221
 222                 [OP_ADD] =              "add",
 223                 [OP_ASSIGN] =           "assign",
 224                 [OP_ASSIGN_FINAL] =     "assign-final",
 225 }       ;
 226
 227         return operation_strs[type];
 228 }
 229
 230 static const char *string_glob_str(enum string_glob_type type)
 231 {
 232         static const char *string_glob_strs[] = {
 233                 [GL_UNSET] =            "UNSET",
 234                 [GL_PLAIN] =            "plain",
 235                 [GL_GLOB] =             "glob",
 236                 [GL_SPLIT] =            "split",
 237                 [GL_SPLIT_GLOB] =       "split-glob",
 238                 [GL_SOMETHING] =        "split-glob",
 239         };
 240
 241         return string_glob_strs[type];
 242 }
 243
 244 static const char *token_str(enum token_type type)
 245 {
 246         static const char *token_strs[] = {
 247                 [TK_UNSET] =                    "UNSET",
 248                 [TK_RULE] =                     "RULE",
 249
 250                 [TK_M_ACTION] =                 "M ACTION",
 251                 [TK_M_DEVPATH] =                "M DEVPATH",
 252                 [TK_M_KERNEL] =                 "M KERNEL",
 253                 [TK_M_DEVLINK] =                "M DEVLINK",
 254                 [TK_M_NAME] =                   "M NAME",
 255                 [TK_M_ENV] =                    "M ENV",
 256                 [TK_M_SUBSYSTEM] =              "M SUBSYSTEM",
 257                 [TK_M_DRIVER] =                 "M DRIVER",
 258                 [TK_M_WAITFOR] =                "M WAITFOR",
 259                 [TK_M_ATTR] =                   "M ATTR",
 260
 261                 [TK_M_PARENTS_MIN] =            "M PARENTS_MIN",
 262                 [TK_M_KERNELS] =                "M KERNELS",
 263                 [TK_M_SUBSYSTEMS] =             "M SUBSYSTEMS",
 264                 [TK_M_DRIVERS] =                "M DRIVERS",
 265                 [TK_M_ATTRS] =                  "M ATTRS",
 266                 [TK_M_PARENTS_MAX] =            "M PARENTS_MAX",
 267
 268                 [TK_M_TEST] =                   "M TEST",
 269                 [TK_M_PROGRAM] =                "M PROGRAM",
 270                 [TK_M_IMPORT_FILE] =            "M IMPORT_FILE",
 271                 [TK_M_IMPORT_PROG] =            "M IMPORT_PROG",
 272                 [TK_M_IMPORT_DB] =              "M IMPORT_DB",
 273                 [TK_M_IMPORT_PARENT] =          "M IMPORT_PARENT",
 274                 [TK_M_RESULT] =                 "M RESULT",
 275                 [TK_M_MAX] =                    "M MAX",
 276
 277                 [TK_A_STRING_ESCAPE_NONE] =     "A STRING_ESCAPE_NONE",
 278                 [TK_A_STRING_ESCAPE_REPLACE] =  "A STRING_ESCAPE_REPLACE",
 279                 [TK_A_INOTIFY_WATCH] =          "A INOTIFY_WATCH",
 280                 [TK_A_DEVLINK_PRIO] =           "A DEVLINK_PRIO",
 281                 [TK_A_OWNER] =                  "A OWNER",
 282                 [TK_A_GROUP] =                  "A GROUP",
 283                 [TK_A_MODE] =                   "A MODE",
 284                 [TK_A_OWNER_ID] =               "A OWNER_ID",
 285                 [TK_A_GROUP_ID] =               "A GROUP_ID",
 286                 [TK_A_MODE_ID] =                "A MODE_ID",
 287                 [TK_A_ENV] =                    "A ENV",
 288                 [TK_A_NAME] =                   "A NAME",
 289                 [TK_A_DEVLINK] =                "A DEVLINK",
 290                 [TK_A_EVENT_TIMEOUT] =          "A EVENT_TIMEOUT",
 291                 [TK_A_ATTR] =                   "A ATTR",
 292                 [TK_A_RUN] =                    "A RUN",
 293                 [TK_A_GOTO] =                   "A GOTO",
 294
 295                 [TK_END] =                      "END",
 296         };
 297
 298         return token_strs[type];
 299 }
 300
 301 static void dump_token(struct udev_rules *rules, struct token *token)
 302 {
 303         enum token_type type = token->type;
 304         enum operation_type op = token->key.op;
 305         enum string_glob_type glob = token->key.glob;
 306         const char *value = &rules->buf[token->key.value_off];
 307         const char *attr = &rules->buf[token->key.attr_off];
 308
 309         switch (type) {
 310         case TK_RULE:
 311                 {
 312                         const char *tks_ptr = (char *)rules->tokens;
 313                         const char *tk_ptr = (char *)token;
 314                         unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
 315
 316                         dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
 317                             &rules->buf[token->rule.filename_off], token->rule.filename_line,
 318                             idx, token->rule.token_count,
 319                             &rules->buf[token->rule.label_off],
 320                             token->rule.flags);
 321                         break;
 322                 }
 323         case TK_M_ACTION:
 324         case TK_M_DEVPATH:
 325         case TK_M_KERNEL:
 326         case TK_M_SUBSYSTEM:
 327         case TK_M_DRIVER:
 328         case TK_M_WAITFOR:
 329         case TK_M_DEVLINK:
 330         case TK_M_NAME:
 331         case TK_M_KERNELS:
 332         case TK_M_SUBSYSTEMS:
 333         case TK_M_DRIVERS:
 334         case TK_M_PROGRAM:
 335         case TK_M_IMPORT_FILE:
 336         case TK_M_IMPORT_PROG:
 337         case TK_M_IMPORT_DB:
 338         case TK_M_IMPORT_PARENT:
 339         case TK_M_RESULT:
 340         case TK_A_NAME:
 341         case TK_A_DEVLINK:
 342         case TK_A_OWNER:
 343         case TK_A_GROUP:
 344         case TK_A_MODE:
 345         case TK_A_RUN:
 346                 dbg(rules->udev, "%s %s '%s'(%s)\n",
 347                     token_str(type), operation_str(op), value, string_glob_str(glob));
 348                 break;
 349         case TK_M_ATTR:
 350         case TK_M_ATTRS:
 351         case TK_M_ENV:
 352         case TK_A_ATTR:
 353         case TK_A_ENV:
 354                 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
 355                     token_str(type), operation_str(op), attr, value, string_glob_str(glob));
 356                 break;
 357         case TK_A_STRING_ESCAPE_NONE:
 358         case TK_A_STRING_ESCAPE_REPLACE:
 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_DEVLINK_PRIO:
 369                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
 370                 break;
 371         case TK_A_OWNER_ID:
 372                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
 373                 break;
 374         case TK_A_GROUP_ID:
 375                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
 376                 break;
 377         case TK_A_MODE_ID:
 378                 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
 379                 break;
 380         case TK_A_EVENT_TIMEOUT:
 381                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
 382                 break;
 383         case TK_A_GOTO:
 384                 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
 385                 break;
 386         case TK_END:
 387                 dbg(rules->udev, "* %s\n", token_str(type));
 388                 break;
 389         case TK_M_PARENTS_MIN:
 390         case TK_M_PARENTS_MAX:
 391         case TK_M_MAX:
 392         case TK_UNSET:
 393                 dbg(rules->udev, "unknown type %u\n", type);
 394                 break;
 395         }
 396 }
 397
 398 static void dump_rules(struct udev_rules *rules)
 399 {
 400         unsigned int i;
 401
 402         dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
 403             rules->token_cur,
 404             rules->token_cur * sizeof(struct token),
 405             rules->buf_count,
 406             rules->buf_cur);
 407         for(i = 0; i < rules->token_cur; i++)
 408                 dump_token(rules, &rules->tokens[i]);
 409 }
 410 #else
 411 static inline const char *operation_str(enum operation_type type) { return NULL; }
 412 static inline const char *token_str(enum token_type type) { return NULL; }
 413 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
 414 static inline void dump_rules(struct udev_rules *rules) {}
 415 #endif /* ENABLE_DEBUG */
 416
 417 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
 418 {
 419         int off;
 420
 421         /* grow buffer if needed */
 422         if (rules->buf_cur + bytes+1 >= rules->buf_max) {
 423                 char *buf;
 424                 unsigned int add;
 425
 426                 /* double the buffer size */
 427                 add = rules->buf_max;
 428                 if (add < bytes * 8)
 429                         add = bytes * 8;
 430
 431                 buf = realloc(rules->buf, rules->buf_max + add);
 432                 if (buf == NULL)
 433                         return -1;
 434                 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
 435                 rules->buf = buf;
 436                 rules->buf_max += add;
 437         }
 438         off = rules->buf_cur;
 439         memcpy(&rules->buf[rules->buf_cur], str, bytes);
 440         rules->buf_cur += bytes;
 441         rules->buf_count++;
 442         return off;
 443 }
 444
 445 static int add_string(struct udev_rules *rules, const char *str)
 446 {
 447         unsigned int node_idx;
 448         struct trie_node *new_node;
 449         unsigned int new_node_idx;
 450         unsigned char key;
 451         unsigned short len;
 452         unsigned int depth;
 453         unsigned int off;
 454         struct trie_node *parent;
 455
 456         /* walk trie, start from last character of str to find matching tails */
 457         len = strlen(str);
 458         key = str[len-1];
 459         node_idx = 0;
 460         for (depth = 0; depth <= len; depth++) {
 461                 struct trie_node *node;
 462                 unsigned int child_idx;
 463
 464                 node = &rules->trie_nodes[node_idx];
 465                 off = node->value_off + node->value_len - len;
 466
 467                 /* match against current node */
 468                 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
 469                         return off;
 470
 471                 /* lookup child node */
 472                 key = str[len - 1 - depth];
 473                 child_idx = node->child_idx;
 474                 while (child_idx > 0) {
 475                         struct trie_node *child;
 476
 477                         child = &rules->trie_nodes[child_idx];
 478                         if (child->key == key)
 479                                 break;
 480                         child_idx = child->next_child_idx;
 481                 }
 482                 if (child_idx == 0)
 483                         break;
 484                 node_idx = child_idx;
 485         }
 486
 487         /* string not found, add it */
 488         off = add_new_string(rules, str, len + 1);
 489
 490         /* grow trie nodes if needed */
 491         if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
 492                 struct trie_node *nodes;
 493                 unsigned int add;
 494
 495                 /* double the buffer size */
 496                 add = rules->trie_nodes_max;
 497                 if (add < 8)
 498                         add = 8;
 499
 500                 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
 501                 if (nodes == NULL)
 502                         return -1;
 503                 dbg(rules->udev, "extend trie nodes from %u to %u\n",
 504                     rules->trie_nodes_max, rules->trie_nodes_max + add);
 505                 rules->trie_nodes = nodes;
 506                 rules->trie_nodes_max += add;
 507         }
 508
 509         /* get a new node */
 510         new_node_idx = rules->trie_nodes_cur;
 511         rules->trie_nodes_cur++;
 512         new_node = &rules->trie_nodes[new_node_idx];
 513         memset(new_node, 0x00, sizeof(struct trie_node));
 514         new_node->value_off = off;
 515         new_node->value_len = len;
 516         new_node->key = key;
 517
 518         /* join the parent's child list */
 519         parent = &rules->trie_nodes[node_idx];
 520         if (parent->child_idx == 0) {
 521                 parent->child_idx = new_node_idx;
 522         } else {
 523                 struct trie_node *last_child;
 524
 525                 last_child = &rules->trie_nodes[parent->last_child_idx];
 526                 last_child->next_child_idx = new_node_idx;
 527         }
 528         parent->last_child_idx = new_node_idx;
 529         return off;
 530 }
 531
 532 static int add_token(struct udev_rules *rules, struct token *token)
 533 {
 534         /* grow buffer if needed */
 535         if (rules->token_cur+1 >= rules->token_max) {
 536                 struct token *tokens;
 537                 unsigned int add;
 538
 539                 /* double the buffer size */
 540                 add = rules->token_max;
 541                 if (add < 8)
 542                         add = 8;
 543
 544                 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
 545                 if (tokens == NULL)
 546                         return -1;
 547                 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
 548                 rules->tokens = tokens;
 549                 rules->token_max += add;
 550         }
 551         memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
 552         rules->token_cur++;
 553         return 0;
 554 }
 555
 556 static uid_t add_uid(struct udev_rules *rules, const char *owner)
 557 {
 558         unsigned int i;
 559         uid_t uid;
 560         unsigned int off;
 561
 562         /* lookup, if we know it already */
 563         for (i = 0; i < rules->uids_cur; i++) {
 564                 off = rules->uids[i].name_off;
 565                 if (strcmp(&rules->buf[off], owner) == 0) {
 566                         uid = rules->uids[i].uid;
 567                         dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
 568                         return uid;
 569                 }
 570         }
 571         uid = util_lookup_user(rules->udev, owner);
 572
 573         /* grow buffer if needed */
 574         if (rules->uids_cur+1 >= rules->uids_max) {
 575                 struct uid_gid *uids;
 576                 unsigned int add;
 577
 578                 /* double the buffer size */
 579                 add = rules->uids_max;
 580                 if (add < 1)
 581                         add = 8;
 582
 583                 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
 584                 if (uids == NULL)
 585                         return uid;
 586                 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
 587                 rules->uids = uids;
 588                 rules->uids_max += add;
 589         }
 590         rules->uids[rules->uids_cur].uid = uid;
 591         off = add_string(rules, owner);
 592         if (off <= 0)
 593                 return uid;
 594         rules->uids[rules->uids_cur].name_off = off;
 595         rules->uids_cur++;
 596         return uid;
 597 }
 598
 599 static gid_t add_gid(struct udev_rules *rules, const char *group)
 600 {
 601         unsigned int i;
 602         gid_t gid;
 603         unsigned int off;
 604
 605         /* lookup, if we know it already */
 606         for (i = 0; i < rules->gids_cur; i++) {
 607                 off = rules->gids[i].name_off;
 608                 if (strcmp(&rules->buf[off], group) == 0) {
 609                         gid = rules->gids[i].gid;
 610                         dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
 611                         return gid;
 612                 }
 613         }
 614         gid = util_lookup_group(rules->udev, group);
 615
 616         /* grow buffer if needed */
 617         if (rules->gids_cur+1 >= rules->gids_max) {
 618                 struct uid_gid *gids;
 619                 unsigned int add;
 620
 621                 /* double the buffer size */
 622                 add = rules->gids_max;
 623                 if (add < 1)
 624                         add = 8;
 625
 626                 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
 627                 if (gids == NULL)
 628                         return gid;
 629                 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
 630                 rules->gids = gids;
 631                 rules->gids_max += add;
 632         }
 633         rules->gids[rules->gids_cur].gid = gid;
 634         off = add_string(rules, group);
 635         if (off <= 0)
 636                 return gid;
 637         rules->gids[rules->gids_cur].name_off = off;
 638         rules->gids_cur++;
 639         return gid;
 640 }
 641
 642 static int import_property_from_string(struct udev_device *dev, char *line)
 643 {
 644         struct udev *udev = udev_device_get_udev(dev);
 645         char *key;
 646         char *val;
 647         size_t len;
 648
 649         /* find key */
 650         key = line;
 651         while (isspace(key[0]))
 652                 key++;
 653
 654         /* comment or empty line */
 655         if (key[0] == '#' || key[0] == '\0')
 656                 return -1;
 657
 658         /* split key/value */
 659         val = strchr(key, '=');
 660         if (val == NULL)
 661                 return -1;
 662         val[0] = '\0';
 663         val++;
 664
 665         /* find value */
 666         while (isspace(val[0]))
 667                 val++;
 668
 669         /* terminate key */
 670         len = strlen(key);
 671         if (len == 0)
 672                 return -1;
 673         while (isspace(key[len-1]))
 674                 len--;
 675         key[len] = '\0';
 676
 677         /* terminate value */
 678         len = strlen(val);
 679         if (len == 0)
 680                 return -1;
 681         while (isspace(val[len-1]))
 682                 len--;
 683         val[len] = '\0';
 684
 685         if (len == 0)
 686                 return -1;
 687
 688         /* unquote */
 689         if (val[0] == '"' || val[0] == '\'') {
 690                 if (val[len-1] != val[0]) {
 691                         info(udev, "inconsistent quoting: '%s', skip\n", line);
 692                         return -1;
 693                 }
 694                 val[len-1] = '\0';
 695                 val++;
 696         }
 697
 698         dbg(udev, "adding '%s'='%s'\n", key, val);
 699
 700         /* handle device, renamed by external tool, returning new path */
 701         if (strcmp(key, "DEVPATH") == 0) {
 702                 char syspath[UTIL_PATH_SIZE];
 703
 704                 info(udev, "updating devpath from '%s' to '%s'\n",
 705                      udev_device_get_devpath(dev), val);
 706                 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL);
 707                 udev_device_set_syspath(dev, syspath);
 708         } else {
 709                 struct udev_list_entry *entry;
 710
 711                 entry = udev_device_add_property(dev, key, val);
 712                 /* store in db, skip private keys */
 713                 if (key[0] != '.')
 714                         udev_list_entry_set_flags(entry, 1);
 715         }
 716         return 0;
 717 }
 718
 719 static int import_file_into_properties(struct udev_device *dev, const char *filename)
 720 {
 721         FILE *f;
 722         char line[UTIL_LINE_SIZE];
 723
 724         f = fopen(filename, "r");
 725         if (f == NULL)
 726                 return -1;
 727         while (fgets(line, sizeof(line), f) != NULL)
 728                 import_property_from_string(dev, line);
 729         fclose(f);
 730         return 0;
 731 }
 732
 733 static int import_program_into_properties(struct udev_device *dev, const char *program)
 734 {
 735         struct udev *udev = udev_device_get_udev(dev);
 736         char **envp;
 737         char result[4096];
 738         size_t reslen;
 739         char *line;
 740
 741         envp = udev_device_get_properties_envp(dev);
 742         if (util_run_program(udev, program, envp, result, sizeof(result), &reslen, NULL) != 0)
 743                 return -1;
 744
 745         line = result;
 746         while (line != NULL) {
 747                 char *pos;
 748
 749                 pos = strchr(line, '\n');
 750                 if (pos != NULL) {
 751                         pos[0] = '\0';
 752                         pos = &pos[1];
 753                 }
 754                 import_property_from_string(dev, line);
 755                 line = pos;
 756         }
 757         return 0;
 758 }
 759
 760 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
 761 {
 762         struct udev *udev = udev_device_get_udev(dev);
 763         struct udev_device *dev_parent;
 764         struct udev_list_entry *list_entry;
 765
 766         dev_parent = udev_device_get_parent(dev);
 767         if (dev_parent == NULL)
 768                 return -1;
 769
 770         dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
 771         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
 772                 const char *key = udev_list_entry_get_name(list_entry);
 773                 const char *val = udev_list_entry_get_value(list_entry);
 774
 775                 if (fnmatch(filter, key, 0) == 0) {
 776                         struct udev_list_entry *entry;
 777
 778                         dbg(udev, "import key '%s=%s'\n", key, val);
 779                         entry = udev_device_add_property(dev, key, val);
 780                         /* store in db, skip private keys */
 781                         if (key[0] != '.')
 782                                 udev_list_entry_set_flags(entry, 1);
 783                 }
 784         }
 785         return 0;
 786 }
 787
 788 #define WAIT_LOOP_PER_SECOND            50
 789 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
 790 {
 791         struct udev *udev = udev_device_get_udev(dev);
 792         char filepath[UTIL_PATH_SIZE];
 793         char devicepath[UTIL_PATH_SIZE];
 794         struct stat stats;
 795         int loop = timeout * WAIT_LOOP_PER_SECOND;
 796
 797         /* a relative path is a device attribute */
 798         devicepath[0] = '\0';
 799         if (file[0] != '/') {
 800                 util_strscpyl(devicepath, sizeof(devicepath),
 801                               udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL);
 802                 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
 803                 file = filepath;
 804         }
 805
 806         dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
 807         while (--loop) {
 808                 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
 809
 810                 /* lookup file */
 811                 if (stat(file, &stats) == 0) {
 812                         info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
 813                         return 0;
 814                 }
 815                 /* make sure, the device did not disappear in the meantime */
 816                 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
 817                         info(udev, "device disappeared while waiting for '%s'\n", file);
 818                         return -2;
 819                 }
 820                 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
 821                 nanosleep(&duration, NULL);
 822         }
 823         info(udev, "waiting for '%s' failed\n", file);
 824         return -1;
 825 }
 826
 827 static int attr_subst_subdir(char *attr, size_t len)
 828 {
 829         int found = 0;
 830
 831         if (strstr(attr, "/*/")) {
 832                 char *pos;
 833                 char dirname[UTIL_PATH_SIZE];
 834                 const char *tail;
 835                 DIR *dir;
 836
 837                 util_strscpy(dirname, sizeof(dirname), attr);
 838                 pos = strstr(dirname, "/*/");
 839                 if (pos == NULL)
 840                         return -1;
 841                 pos[0] = '\0';
 842                 tail = &pos[2];
 843                 dir = opendir(dirname);
 844                 if (dir != NULL) {
 845                         struct dirent *dent;
 846
 847                         for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 848                                 struct stat stats;
 849
 850                                 if (dent->d_name[0] == '.')
 851                                         continue;
 852                                 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
 853                                 if (stat(attr, &stats) == 0) {
 854                                         found = 1;
 855                                         break;
 856                                 }
 857                         }
 858                         closedir(dir);
 859                 }
 860         }
 861
 862         return found;
 863 }
 864
 865 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
 866 {
 867         char *linepos;
 868         char *temp;
 869
 870         linepos = *line;
 871         if (linepos == NULL || linepos[0] == '\0')
 872                 return -1;
 873
 874         /* skip whitespace */
 875         while (isspace(linepos[0]) || linepos[0] == ',')
 876                 linepos++;
 877
 878         /* get the key */
 879         if (linepos[0] == '\0')
 880                 return -1;
 881         *key = linepos;
 882
 883         while (1) {
 884                 linepos++;
 885                 if (linepos[0] == '\0')
 886                         return -1;
 887                 if (isspace(linepos[0]))
 888                         break;
 889                 if (linepos[0] == '=')
 890                         break;
 891                 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
 892                         if (linepos[1] == '=')
 893                                 break;
 894         }
 895
 896         /* remember end of key */
 897         temp = linepos;
 898
 899         /* skip whitespace after key */
 900         while (isspace(linepos[0]))
 901                 linepos++;
 902         if (linepos[0] == '\0')
 903                 return -1;
 904
 905         /* get operation type */
 906         if (linepos[0] == '=' && linepos[1] == '=') {
 907                 *op = OP_MATCH;
 908                 linepos += 2;
 909         } else if (linepos[0] == '!' && linepos[1] == '=') {
 910                 *op = OP_NOMATCH;
 911                 linepos += 2;
 912         } else if (linepos[0] == '+' && linepos[1] == '=') {
 913                 *op = OP_ADD;
 914                 linepos += 2;
 915         } else if (linepos[0] == '=') {
 916                 *op = OP_ASSIGN;
 917                 linepos++;
 918         } else if (linepos[0] == ':' && linepos[1] == '=') {
 919                 *op = OP_ASSIGN_FINAL;
 920                 linepos += 2;
 921         } else
 922                 return -1;
 923
 924         /* terminate key */
 925         temp[0] = '\0';
 926
 927         /* skip whitespace after operator */
 928         while (isspace(linepos[0]))
 929                 linepos++;
 930         if (linepos[0] == '\0')
 931                 return -1;
 932
 933         /* get the value */
 934         if (linepos[0] == '"')
 935                 linepos++;
 936         else
 937                 return -1;
 938         *value = linepos;
 939
 940         /* terminate */
 941         temp = strchr(linepos, '"');
 942         if (!temp)
 943                 return -1;
 944         temp[0] = '\0';
 945         temp++;
 946         dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
 947
 948         /* move line to next key */
 949         *line = temp;
 950         return 0;
 951 }
 952
 953 /* extract possible KEY{attr} */
 954 static char *get_key_attribute(struct udev *udev, char *str)
 955 {
 956         char *pos;
 957         char *attr;
 958
 959         attr = strchr(str, '{');
 960         if (attr != NULL) {
 961                 attr++;
 962                 pos = strchr(attr, '}');
 963                 if (pos == NULL) {
 964                         err(udev, "missing closing brace for format\n");
 965                         return NULL;
 966                 }
 967                 pos[0] = '\0';
 968                 dbg(udev, "attribute='%s'\n", attr);
 969                 return attr;
 970         }
 971         return NULL;
 972 }
 973
 974 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
 975                         enum operation_type op,
 976                         const char *value, const void *data)
 977 {
 978         struct token *token = &rule_tmp->token[rule_tmp->token_cur];
 979         const char *attr = NULL;
 980
 981         memset(token, 0x00, sizeof(struct token));
 982
 983         switch (type) {
 984         case TK_M_ACTION:
 985         case TK_M_DEVPATH:
 986         case TK_M_KERNEL:
 987         case TK_M_SUBSYSTEM:
 988         case TK_M_DRIVER:
 989         case TK_M_WAITFOR:
 990         case TK_M_DEVLINK:
 991         case TK_M_NAME:
 992         case TK_M_KERNELS:
 993         case TK_M_SUBSYSTEMS:
 994         case TK_M_DRIVERS:
 995         case TK_M_PROGRAM:
 996         case TK_M_IMPORT_FILE:
 997         case TK_M_IMPORT_PROG:
 998         case TK_M_IMPORT_DB:
 999         case TK_M_IMPORT_PARENT:
1000         case TK_M_RESULT:
1001         case TK_A_OWNER:
1002         case TK_A_GROUP:
1003         case TK_A_MODE:
1004         case TK_A_NAME:
1005         case TK_A_GOTO:
1006                 token->key.value_off = add_string(rule_tmp->rules, value);
1007                 break;
1008         case TK_M_ENV:
1009         case TK_M_ATTR:
1010         case TK_M_ATTRS:
1011         case TK_A_ATTR:
1012         case TK_A_ENV:
1013                 attr = data;
1014                 token->key.value_off = add_string(rule_tmp->rules, value);
1015                 token->key.attr_off = add_string(rule_tmp->rules, attr);
1016                 break;
1017         case TK_A_DEVLINK:
1018                 token->key.value_off = add_string(rule_tmp->rules, value);
1019                 token->key.devlink_unique = *(int *)data;
1020                 break;
1021         case TK_M_TEST:
1022                 token->key.value_off = add_string(rule_tmp->rules, value);
1023                 if (data != NULL)
1024                         token->key.mode = *(mode_t *)data;
1025                 break;
1026         case TK_A_STRING_ESCAPE_NONE:
1027         case TK_A_STRING_ESCAPE_REPLACE:
1028                 break;
1029         case TK_A_RUN:
1030                 token->key.value_off = add_string(rule_tmp->rules, value);
1031                 token->key.fail_on_error = *(int *)data;
1032                 break;
1033         case TK_A_INOTIFY_WATCH:
1034         case TK_A_DEVLINK_PRIO:
1035                 token->key.devlink_prio = *(int *)data;
1036                 break;
1037         case TK_A_OWNER_ID:
1038                 token->key.uid = *(uid_t *)data;
1039                 break;
1040         case TK_A_GROUP_ID:
1041                 token->key.gid = *(gid_t *)data;
1042                 break;
1043         case TK_A_MODE_ID:
1044                 token->key.mode = *(mode_t *)data;
1045                 break;
1046         case TK_A_EVENT_TIMEOUT:
1047                 token->key.event_timeout = *(int *)data;
1048                 break;
1049         case TK_RULE:
1050         case TK_M_PARENTS_MIN:
1051         case TK_M_PARENTS_MAX:
1052         case TK_M_MAX:
1053         case TK_END:
1054         case TK_UNSET:
1055                 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1056                 return -1;
1057         }
1058
1059         if (value != NULL && type < TK_M_MAX) {
1060                 /* check if we need to split or call fnmatch() while matching rules */
1061                 enum string_glob_type glob;
1062                 int has_split;
1063                 int has_glob;
1064
1065                 has_split = (strchr(value, '|') != NULL);
1066                 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1067                 if (has_split && has_glob) {
1068                         glob = GL_SPLIT_GLOB;
1069                 } else if (has_split) {
1070                         glob = GL_SPLIT;
1071                 } else if (has_glob) {
1072                         if (strcmp(value, "?*") == 0)
1073                                 glob = GL_SOMETHING;
1074                         else
1075                                 glob = GL_GLOB;
1076                 } else {
1077                         glob = GL_PLAIN;
1078                 }
1079                 token->key.glob = glob;
1080         }
1081
1082         if (value != NULL && type > TK_M_MAX) {
1083                 /* check if assigned value has substitution chars */
1084                 if (value[0] == '[')
1085                         token->key.subst = SB_SUBSYS;
1086                 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1087                         token->key.subst = SB_FORMAT;
1088                 else
1089                         token->key.subst = SB_NONE;
1090         }
1091
1092         if (attr != NULL) {
1093                 /* check if property/attribut name has substitution chars */
1094                 if (attr[0] == '[')
1095                         token->key.attrsubst = SB_SUBSYS;
1096                 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1097                         token->key.attrsubst = SB_FORMAT;
1098                 else
1099                         token->key.attrsubst = SB_NONE;
1100         }
1101
1102         token->key.type = type;
1103         token->key.op = op;
1104         rule_tmp->token_cur++;
1105         if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1106                 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1107                 return -1;
1108         }
1109         return 0;
1110 }
1111
1112 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1113 {
1114         unsigned int i;
1115         unsigned int start = 0;
1116         unsigned int end = rule_tmp->token_cur;
1117
1118         for (i = 0; i < rule_tmp->token_cur; i++) {
1119                 enum token_type next_val = TK_UNSET;
1120                 unsigned int next_idx = 0;
1121                 unsigned int j;
1122
1123                 /* find smallest value */
1124                 for (j = start; j < end; j++) {
1125                         if (rule_tmp->token[j].type == TK_UNSET)
1126                                 continue;
1127                         if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1128                                 next_val = rule_tmp->token[j].type;
1129                                 next_idx = j;
1130                         }
1131                 }
1132
1133                 /* add token and mark done */
1134                 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1135                         return -1;
1136                 rule_tmp->token[next_idx].type = TK_UNSET;
1137
1138                 /* shrink range */
1139                 if (next_idx == start)
1140                         start++;
1141                 if (next_idx+1 == end)
1142                         end--;
1143         }
1144         return 0;
1145 }
1146
1147 static int add_rule(struct udev_rules *rules, char *line,
1148                     const char *filename, unsigned int filename_off, unsigned int lineno)
1149 {
1150         char *linepos;
1151         char *attr;
1152         struct rule_tmp rule_tmp;
1153         bool bus_warn = false;
1154         bool sysfs_warn = false;
1155         bool id_warn = false;
1156
1157         memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1158         rule_tmp.rules = rules;
1159         rule_tmp.rule.type = TK_RULE;
1160         rule_tmp.rule.rule.filename_off = filename_off;
1161         rule_tmp.rule.rule.filename_line = lineno;
1162
1163         linepos = line;
1164         while (1) {
1165                 char *key;
1166                 char *value;
1167                 enum operation_type op;
1168
1169                 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1170                         break;
1171
1172                 if (strcmp(key, "ACTION") == 0) {
1173                         if (op > OP_MATCH_MAX) {
1174                                 err(rules->udev, "invalid ACTION operation\n");
1175                                 goto invalid;
1176                         }
1177                         rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1178                         continue;
1179                 }
1180
1181                 if (strcmp(key, "DEVPATH") == 0) {
1182                         if (op > OP_MATCH_MAX) {
1183                                 err(rules->udev, "invalid DEVPATH operation\n");
1184                                 goto invalid;
1185                         }
1186                         rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1187                         continue;
1188                 }
1189
1190                 if (strcmp(key, "KERNEL") == 0) {
1191                         if (op > OP_MATCH_MAX) {
1192                                 err(rules->udev, "invalid KERNEL operation\n");
1193                                 goto invalid;
1194                         }
1195                         rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1196                         continue;
1197                 }
1198
1199                 if (strcmp(key, "SUBSYSTEM") == 0) {
1200                         if (op > OP_MATCH_MAX) {
1201                                 err(rules->udev, "invalid SUBSYSTEM operation\n");
1202                                 goto invalid;
1203                         }
1204                         /* bus, class, subsystem events should all be the same */
1205                         if (strcmp(value, "subsystem") == 0 ||
1206                             strcmp(value, "bus") == 0 ||
1207                             strcmp(value, "class") == 0) {
1208                                 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1209                                         err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1210                                             "please fix it in %s:%u", value, filename, lineno);
1211                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1212                         } else
1213                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1214                         continue;
1215                 }
1216
1217                 if (strcmp(key, "DRIVER") == 0) {
1218                         if (op > OP_MATCH_MAX) {
1219                                 err(rules->udev, "invalid DRIVER operation\n");
1220                                 goto invalid;
1221                         }
1222                         rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1223                         continue;
1224                 }
1225
1226                 if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1227                         attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1228                         if (attr == NULL) {
1229                                 err(rules->udev, "error parsing ATTR attribute\n");
1230                                 goto invalid;
1231                         }
1232                         if (op < OP_MATCH_MAX) {
1233                                 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1234                         } else {
1235                                 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1236                         }
1237                         continue;
1238                 }
1239
1240                 if (strcmp(key, "KERNELS") == 0) {
1241                         if (op > OP_MATCH_MAX) {
1242                                 err(rules->udev, "invalid KERNELS operation\n");
1243                                 goto invalid;
1244                         }
1245                         rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1246                         continue;
1247                 }
1248
1249                 if (strcmp(key, "ID") == 0) {
1250                         if (!id_warn) {
1251                                 id_warn = true;
1252                                 err(rules->udev, "ID= will be removed in a future udev version, "
1253                                     "please use KERNEL= to match the event device, or KERNELS= "
1254                                     "to match a parent device, in %s:%u\n", filename, lineno);
1255                         }
1256                         if (op > OP_MATCH_MAX) {
1257                                 err(rules->udev, "invalid KERNELS operation\n");
1258                                 goto invalid;
1259                         }
1260                         rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1261                         continue;
1262                 }
1263
1264                 if (strcmp(key, "SUBSYSTEMS") == 0) {
1265                         if (op > OP_MATCH_MAX) {
1266                                 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1267                                 goto invalid;
1268                         }
1269                         rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1270                         continue;
1271                 }
1272
1273                 if (strcmp(key, "BUS") == 0) {
1274                         if (!bus_warn) {
1275                                 bus_warn = true;
1276                                 err(rules->udev, "BUS= will be removed in a future udev version, "
1277                                     "please use SUBSYSTEM= to match the event device, or SUBSYSTEMS= "
1278                                     "to match a parent device, in %s:%u\n", filename, lineno);
1279                         }
1280                         if (op > OP_MATCH_MAX) {
1281                                 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1282                                 goto invalid;
1283                         }
1284                         rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1285                         continue;
1286                 }
1287
1288                 if (strcmp(key, "DRIVERS") == 0) {
1289                         if (op > OP_MATCH_MAX) {
1290                                 err(rules->udev, "invalid DRIVERS operation\n");
1291                                 goto invalid;
1292                         }
1293                         rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1294                         continue;
1295                 }
1296
1297                 if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0) {
1298                         if (op > OP_MATCH_MAX) {
1299                                 err(rules->udev, "invalid ATTRS operation\n");
1300                                 goto invalid;
1301                         }
1302                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1303                         if (attr == NULL) {
1304                                 err(rules->udev, "error parsing ATTRS attribute\n");
1305                                 goto invalid;
1306                         }
1307                         if (strncmp(attr, "device/", 7) == 0)
1308                                 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1309                                     "please fix it in %s:%u", filename, lineno);
1310                         else if (strstr(attr, "../") != NULL)
1311                                 err(rules->udev, "do not reference parent sysfs directories directly, "
1312                                     "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1313                         rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1314                         continue;
1315                 }
1316
1317                 if (strncmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1318                         if (!sysfs_warn) {
1319                                 sysfs_warn = true;
1320                                 err(rules->udev, "SYSFS{}= will be removed in a future udev version, "
1321                                     "please use ATTR{}= to match the event device, or ATTRS{}= "
1322                                     "to match a parent device, in %s:%u\n", filename, lineno);
1323                         }
1324                         if (op > OP_MATCH_MAX) {
1325                                 err(rules->udev, "invalid ATTRS operation\n");
1326                                 goto invalid;
1327                         }
1328                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1329                         if (attr == NULL) {
1330                                 err(rules->udev, "error parsing ATTRS attribute\n");
1331                                 goto invalid;
1332                         }
1333                         rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1334                         continue;
1335                 }
1336
1337                 if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1338                         attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1339                         if (attr == NULL) {
1340                                 err(rules->udev, "error parsing ENV attribute\n");
1341                                 goto invalid;
1342                         }
1343                         if (op < OP_MATCH_MAX) {
1344                                 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1345                                         goto invalid;
1346                         } else {
1347                                 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1348                                         goto invalid;
1349                         }
1350                         continue;
1351                 }
1352
1353                 if (strcmp(key, "PROGRAM") == 0) {
1354                         rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1355                         continue;
1356                 }
1357
1358                 if (strcmp(key, "RESULT") == 0) {
1359                         if (op > OP_MATCH_MAX) {
1360                                 err(rules->udev, "invalid RESULT operation\n");
1361                                 goto invalid;
1362                         }
1363                         rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1364                         continue;
1365                 }
1366
1367                 if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1368                         attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1369                         if (attr != NULL && strstr(attr, "program")) {
1370                                 dbg(rules->udev, "IMPORT will be executed\n");
1371                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1372                         } else if (attr != NULL && strstr(attr, "file")) {
1373                                 dbg(rules->udev, "IMPORT will be included as file\n");
1374                                 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1375                         } else if (attr != NULL && strstr(attr, "db")) {
1376                                 dbg(rules->udev, "IMPORT will include db values\n");
1377                                 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1378                         } else if (attr != NULL && strstr(attr, "parent")) {
1379                                 dbg(rules->udev, "IMPORT will include the parent values\n");
1380                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1381                         } else {
1382                                 /* figure it out if it is executable */
1383                                 char file[UTIL_PATH_SIZE];
1384                                 char *pos;
1385                                 struct stat statbuf;
1386
1387                                 /* allow programs in /lib/udev called without the path */
1388                                 if (value[0] != '/')
1389                                         util_strscpyl(file, sizeof(file), LIBEXECDIR "/", value, NULL);
1390                                 else
1391                                         util_strscpy(file, sizeof(file), value);
1392                                 pos = strchr(file, ' ');
1393                                 if (pos)
1394                                         pos[0] = '\0';
1395                                 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1396                                 if (stat(file, &statbuf) == 0 && (statbuf.st_mode & S_IXUSR)) {
1397                                         dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1398                                         rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1399                                 } else {
1400                                         dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1401                                         rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1402                                 }
1403                         }
1404                         continue;
1405                 }
1406
1407                 if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) {
1408                         mode_t mode = 0;
1409
1410                         if (op > OP_MATCH_MAX) {
1411                                 err(rules->udev, "invalid TEST operation\n");
1412                                 goto invalid;
1413                         }
1414                         attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1415                         if (attr != NULL) {
1416                                 mode = strtol(attr, NULL, 8);
1417                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1418                         } else {
1419                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1420                         }
1421                         continue;
1422                 }
1423
1424                 if (strncmp(key, "RUN", sizeof("RUN")-1) == 0) {
1425                         int flag = 0;
1426
1427                         attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1428                         if (attr != NULL && strstr(attr, "fail_event_on_error"))
1429                                 flag = 1;
1430                         rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1431                         continue;
1432                 }
1433
1434                 if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) {
1435                         rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1436                         continue;
1437                 }
1438
1439                 if (strcmp(key, "LABEL") == 0) {
1440                         rule_tmp.rule.rule.label_off = add_string(rules, value);
1441                         continue;
1442                 }
1443
1444                 if (strcmp(key, "GOTO") == 0) {
1445                         rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1446                         continue;
1447                 }
1448
1449                 if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) {
1450                         if (op < OP_MATCH_MAX) {
1451                                 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1452                         } else {
1453                                 if (value[0] == '\0')
1454                                         info(rules->udev, "name empty, node creation suppressed\n");
1455                                 else if (strcmp(value, "%k") == 0)
1456                                         err(rules->udev, "NAME=\"%%k\" is superfluous and breaks "
1457                                             "kernel supplied names, please remove it from %s:%u\n", filename, lineno);
1458                                 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1459                         }
1460                         rule_tmp.rule.rule.flags = 1;
1461                         continue;
1462                 }
1463
1464                 if (strncmp(key, "SYMLINK", sizeof("SYMLINK")-1) == 0) {
1465                         if (op < OP_MATCH_MAX) {
1466                                 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1467                         } else {
1468                                 int flag = 0;
1469
1470                                 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1471                                 if (attr != NULL && strstr(attr, "unique") != NULL)
1472                                         flag = 1;
1473                                 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1474                         }
1475                         rule_tmp.rule.rule.flags = 1;
1476                         continue;
1477                 }
1478
1479                 if (strcmp(key, "OWNER") == 0) {
1480                         uid_t uid;
1481                         char *endptr;
1482
1483                         uid = strtoul(value, &endptr, 10);
1484                         if (endptr[0] == '\0') {
1485                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1486                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1487                                 uid = add_uid(rules, value);
1488                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1489                         } else if (rules->resolve_names >= 0) {
1490                                 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1491                         }
1492                         rule_tmp.rule.rule.flags = 1;
1493                         continue;
1494                 }
1495
1496                 if (strcmp(key, "GROUP") == 0) {
1497                         gid_t gid;
1498                         char *endptr;
1499
1500                         gid = strtoul(value, &endptr, 10);
1501                         if (endptr[0] == '\0') {
1502                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1503                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1504                                 gid = add_gid(rules, value);
1505                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1506                         } else if (rules->resolve_names >= 0) {
1507                                 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1508                         }
1509                         rule_tmp.rule.rule.flags = 1;
1510                         continue;
1511                 }
1512
1513                 if (strcmp(key, "MODE") == 0) {
1514                         mode_t mode;
1515                         char *endptr;
1516
1517                         mode = strtol(value, &endptr, 8);
1518                         if (endptr[0] == '\0')
1519                                 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1520                         else
1521                                 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1522                         rule_tmp.rule.rule.flags = 1;
1523                         continue;
1524                 }
1525
1526                 if (strcmp(key, "OPTIONS") == 0) {
1527                         const char *pos;
1528
1529                         pos = strstr(value, "link_priority=");
1530                         if (pos != NULL) {
1531                                 int prio = atoi(&pos[strlen("link_priority=")]);
1532
1533                                 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1534                                 dbg(rules->udev, "link priority=%i\n", prio);
1535                         }
1536                         pos = strstr(value, "event_timeout=");
1537                         if (pos != NULL) {
1538                                 int tout = atoi(&pos[strlen("event_timeout=")]);
1539
1540                                 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1541                                 dbg(rules->udev, "event timeout=%i\n", tout);
1542                         }
1543                         pos = strstr(value, "string_escape=");
1544                         if (pos != NULL) {
1545                                 pos = &pos[strlen("string_escape=")];
1546                                 if (strncmp(pos, "none", strlen("none")) == 0)
1547                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1548                                 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1549                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1550                         }
1551                         pos = strstr(value, "nowatch");
1552                         if (pos != NULL) {
1553                                 const int off = 0;
1554
1555                                 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &off);
1556                                 dbg(rules->udev, "inotify watch of device disabled\n");
1557                         } else {
1558                                 pos = strstr(value, "watch");
1559                                 if (pos != NULL) {
1560                                         const int on = 1;
1561
1562                                         rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &on);
1563                                         dbg(rules->udev, "inotify watch of device requested\n");
1564                                 }
1565                         }
1566                         continue;
1567                 }
1568                 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1569         }
1570
1571         /* add rule token */
1572         rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1573         if (add_token(rules, &rule_tmp.rule) != 0)
1574                 goto invalid;
1575
1576         /* add tokens to list, sorted by type */
1577         if (sort_token(rules, &rule_tmp) != 0)
1578                 goto invalid;
1579
1580         return 0;
1581 invalid:
1582         err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1583         return -1;
1584 }
1585
1586 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1587 {
1588         FILE *f;
1589         unsigned int first_token;
1590         char line[UTIL_LINE_SIZE];
1591         int line_nr = 0;
1592         unsigned int i;
1593
1594         info(rules->udev, "reading '%s' as rules file\n", filename);
1595
1596         f = fopen(filename, "r");
1597         if (f == NULL)
1598                 return -1;
1599
1600         first_token = rules->token_cur;
1601
1602         while (fgets(line, sizeof(line), f) != NULL) {
1603                 char *key;
1604                 size_t len;
1605
1606                 /* skip whitespace */
1607                 line_nr++;
1608                 key = line;
1609                 while (isspace(key[0]))
1610                         key++;
1611
1612                 /* comment */
1613                 if (key[0] == '#')
1614                         continue;
1615
1616                 len = strlen(line);
1617                 if (len < 3)
1618                         continue;
1619
1620                 /* continue reading if backslash+newline is found */
1621                 while (line[len-2] == '\\') {
1622                         if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1623                                 break;
1624                         if (strlen(&line[len-2]) < 2)
1625                                 break;
1626                         line_nr++;
1627                         len = strlen(line);
1628                 }
1629
1630                 if (len+1 >= sizeof(line)) {
1631                         err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1632                         continue;
1633                 }
1634                 add_rule(rules, key, filename, filename_off, line_nr);
1635         }
1636         fclose(f);
1637
1638         /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1639         for (i = first_token+1; i < rules->token_cur; i++) {
1640                 if (rules->tokens[i].type == TK_A_GOTO) {
1641                         char *label = &rules->buf[rules->tokens[i].key.value_off];
1642                         unsigned int j;
1643
1644                         for (j = i+1; j < rules->token_cur; j++) {
1645                                 if (rules->tokens[j].type != TK_RULE)
1646                                         continue;
1647                                 if (rules->tokens[j].rule.label_off == 0)
1648                                         continue;
1649                                 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1650                                         continue;
1651                                 rules->tokens[i].key.rule_goto = j;
1652                                 break;
1653                         }
1654                         if (rules->tokens[i].key.rule_goto == 0)
1655                                 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1656                 }
1657         }
1658         return 0;
1659 }
1660
1661 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1662 {
1663         DIR *dir;
1664         char filename[UTIL_PATH_SIZE];
1665
1666         dbg(udev, "open directory '%s'\n", dirname);
1667         dir = opendir(dirname);
1668         if (dir == NULL) {
1669                 info(udev, "unable to open '%s': %m\n", dirname);
1670                 return -1;
1671         }
1672
1673         while (1) {
1674                 struct dirent *dent;
1675
1676                 dent = readdir(dir);
1677                 if (dent == NULL || dent->d_name[0] == '\0')
1678                         break;
1679
1680                 if (dent->d_name[0] == '.')
1681                         continue;
1682
1683                 /* look for file matching with specified suffix */
1684                 if (suffix != NULL) {
1685                         const char *ext;
1686
1687                         ext = strrchr(dent->d_name, '.');
1688                         if (ext == NULL)
1689                                 continue;
1690                         if (strcmp(ext, suffix) != 0)
1691                                 continue;
1692                 }
1693                 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1694                 dbg(udev, "put file '%s' into list\n", filename);
1695                 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1696         }
1697
1698         closedir(dir);
1699         return 0;
1700 }
1701
1702 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1703 {
1704         struct udev_rules *rules;
1705         struct stat statbuf;
1706         struct udev_list_node file_list;
1707         struct udev_list_entry *file_loop, *file_tmp;
1708         struct token end_token;
1709
1710         rules = malloc(sizeof(struct udev_rules));
1711         if (rules == NULL)
1712                 return NULL;
1713         memset(rules, 0x00, sizeof(struct udev_rules));
1714         rules->udev = udev;
1715         rules->resolve_names = resolve_names;
1716         udev_list_init(&file_list);
1717
1718         /* init token array and string buffer */
1719         rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1720         if (rules->tokens == NULL)
1721                 return NULL;
1722         rules->token_max = PREALLOC_TOKEN;
1723
1724         rules->buf = malloc(PREALLOC_STRBUF);
1725         if (rules->buf == NULL)
1726                 return NULL;
1727         rules->buf_max = PREALLOC_STRBUF;
1728         /* offset 0 is always '\0' */
1729         rules->buf[0] = '\0';
1730         rules->buf_cur = 1;
1731         dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1732             rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1733
1734         rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1735         if (rules->trie_nodes == NULL)
1736                 return NULL;
1737         rules->trie_nodes_max = PREALLOC_TRIE;
1738         /* offset 0 is the trie root, with an empty string */
1739         memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1740         rules->trie_nodes_cur = 1;
1741
1742         if (udev_get_rules_path(udev) != NULL) {
1743                 /* custom rules location for testing */
1744                 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1745         } else {
1746                 char filename[PATH_MAX];
1747                 struct udev_list_node sort_list;
1748                 struct udev_list_entry *sort_loop, *sort_tmp;
1749
1750                 /* read user/custom rules */
1751                 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1752
1753                 /* read dynamic/temporary rules */
1754                 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
1755                 udev_list_init(&sort_list);
1756                 add_matching_files(udev, &sort_list, filename, ".rules");
1757
1758                 /* read default rules */
1759                 add_matching_files(udev, &sort_list, LIBEXECDIR "/rules.d", ".rules");
1760
1761                 /* sort all rules files by basename into list of files */
1762                 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1763                         const char *sort_name = udev_list_entry_get_name(sort_loop);
1764                         const char *sort_base = strrchr(sort_name, '/');
1765
1766                         if (sort_base == NULL)
1767                                 continue;
1768                         /* sort entry into existing list */
1769                         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1770                                 const char *file_name = udev_list_entry_get_name(file_loop);
1771                                 const char *file_base = strrchr(file_name, '/');
1772
1773                                 if (file_base == NULL)
1774                                         continue;
1775                                 if (strcmp(file_base, sort_base) == 0) {
1776                                         info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1777                                              file_name, sort_name);
1778                                         udev_list_entry_delete(sort_loop);
1779                                         sort_loop = NULL;
1780                                         break;
1781                                 }
1782                                 if (strcmp(file_base, sort_base) > 0) {
1783                                         /* found later file, insert before */
1784                                         udev_list_entry_remove(sort_loop);
1785                                         udev_list_entry_insert_before(sort_loop, file_loop);
1786                                         sort_loop = NULL;
1787                                         break;
1788                                 }
1789                         }
1790                         /* current file already handled */
1791                         if (sort_loop == NULL)
1792                                 continue;
1793                         /* no later file, append to end of list */
1794                         udev_list_entry_remove(sort_loop);
1795                         udev_list_entry_append(sort_loop, &file_list);
1796                 }
1797         }
1798
1799         /* add all filenames to the string buffer */
1800         udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1801                 const char *filename = udev_list_entry_get_name(file_loop);
1802                 unsigned int filename_off;
1803
1804                 filename_off = add_string(rules, filename);
1805                 /* the offset in the rule is limited to unsigned short */
1806                 if (filename_off < USHRT_MAX)
1807                         udev_list_entry_set_flags(file_loop, filename_off);
1808         }
1809
1810         /* parse list of files */
1811         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1812                 const char *filename = udev_list_entry_get_name(file_loop);
1813                 unsigned int filename_off = udev_list_entry_get_flags(file_loop);
1814
1815                 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1816                         parse_file(rules, filename, filename_off);
1817                 else
1818                         err(udev, "can not read '%s'\n", filename);
1819                 udev_list_entry_delete(file_loop);
1820         }
1821
1822         memset(&end_token, 0x00, sizeof(struct token));
1823         end_token.type = TK_END;
1824         add_token(rules, &end_token);
1825
1826         /* shrink allocated token and string buffer */
1827         if (rules->token_cur < rules->token_max) {
1828                 struct token *tokens;
1829
1830                 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1831                 if (tokens != NULL || rules->token_cur == 0) {
1832                         rules->tokens = tokens;
1833                         rules->token_max = rules->token_cur;
1834                 }
1835         }
1836         if (rules->buf_cur < rules->buf_max) {
1837                 char *buf;
1838
1839                 buf = realloc(rules->buf, rules->buf_cur);
1840                 if (buf != NULL || rules->buf_cur == 0) {
1841                         rules->buf = buf;
1842                         rules->buf_max = rules->buf_cur;
1843                 }
1844         }
1845         info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1846              rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1847         info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1848              rules->trie_nodes_cur * sizeof(struct trie_node),
1849              rules->trie_nodes_cur, sizeof(struct trie_node));
1850
1851         /* cleanup trie */
1852         free(rules->trie_nodes);
1853         rules->trie_nodes = NULL;
1854         rules->trie_nodes_cur = 0;
1855         rules->trie_nodes_max = 0;
1856
1857         /* cleanup uid/gid cache */
1858         free(rules->uids);
1859         rules->uids = NULL;
1860         rules->uids_cur = 0;
1861         rules->uids_max = 0;
1862         free(rules->gids);
1863         rules->gids = NULL;
1864         rules->gids_cur = 0;
1865         rules->gids_max = 0;
1866
1867         dump_rules(rules);
1868         return rules;
1869 }
1870
1871 void udev_rules_unref(struct udev_rules *rules)
1872 {
1873         if (rules == NULL)
1874                 return;
1875         free(rules->tokens);
1876         free(rules->buf);
1877         free(rules->trie_nodes);
1878         free(rules->uids);
1879         free(rules->gids);
1880         free(rules);
1881 }
1882
1883 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1884 {
1885         char *key_value = &rules->buf[token->key.value_off];
1886         char *pos;
1887         int match = 0;
1888
1889         if (val == NULL)
1890                 val = "";
1891
1892         switch (token->key.glob) {
1893         case GL_PLAIN:
1894                 match = (strcmp(key_value, val) == 0);
1895                 break;
1896         case GL_GLOB:
1897                 match = (fnmatch(key_value, val, 0) == 0);
1898                 break;
1899         case GL_SPLIT:
1900                 {
1901                         const char *split;
1902                         size_t len;
1903
1904                         split = &rules->buf[token->key.value_off];
1905                         len = strlen(val);
1906                         while (1) {
1907                                 const char *next;
1908
1909                                 next = strchr(split, '|');
1910                                 if (next != NULL) {
1911                                         size_t matchlen = (size_t)(next - split);
1912
1913                                         match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1914                                         if (match)
1915                                                 break;
1916                                 } else {
1917                                         match = (strcmp(split, val) == 0);
1918                                         break;
1919                                 }
1920                                 split = &next[1];
1921                         }
1922                         break;
1923                 }
1924         case GL_SPLIT_GLOB:
1925                 {
1926                         char value[UTIL_PATH_SIZE];
1927
1928                         util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1929                         key_value = value;
1930                         while (key_value != NULL) {
1931                                 pos = strchr(key_value, '|');
1932                                 if (pos != NULL) {
1933                                         pos[0] = '\0';
1934                                         pos = &pos[1];
1935                                 }
1936                                 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1937                                 match = (fnmatch(key_value, val, 0) == 0);
1938                                 if (match)
1939                                         break;
1940                                 key_value = pos;
1941                         }
1942                         break;
1943                 }
1944         case GL_SOMETHING:
1945                 match = (val[0] != '\0');
1946                 break;
1947         case GL_UNSET:
1948                 return -1;
1949         }
1950
1951         if (match && (token->key.op == OP_MATCH)) {
1952                 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1953                 return 0;
1954         }
1955         if (!match && (token->key.op == OP_NOMATCH)) {
1956                 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1957                 return 0;
1958         }
1959         dbg(rules->udev, "%s is not true\n", token_str(token->type));
1960         return -1;
1961 }
1962
1963 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1964 {
1965         const char *name;
1966         char nbuf[UTIL_NAME_SIZE];
1967         const char *value;
1968         char vbuf[UTIL_NAME_SIZE];
1969         size_t len;
1970
1971         name = &rules->buf[cur->key.attr_off];
1972         switch (cur->key.attrsubst) {
1973         case SB_FORMAT:
1974                 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1975                 name = nbuf;
1976                 /* fall through */
1977         case SB_NONE:
1978                 value = udev_device_get_sysattr_value(dev, name);
1979                 if (value == NULL)
1980                         return -1;
1981                 break;
1982         case SB_SUBSYS:
1983                 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1984                         return -1;
1985                 value = vbuf;
1986                 break;
1987         default:
1988                 return -1;
1989         }
1990
1991         /* remove trailing whitespace, if not asked to match for it */
1992         len = strlen(value);
1993         if (len > 0 && isspace(value[len-1])) {
1994                 const char *key_value;
1995                 size_t klen;
1996
1997                 key_value = &rules->buf[cur->key.value_off];
1998                 klen = strlen(key_value);
1999                 if (klen > 0 && !isspace(key_value[klen-1])) {
2000                         if (value != vbuf) {
2001                                 util_strscpy(vbuf, sizeof(vbuf), value);
2002                                 value = vbuf;
2003                         }
2004                         while (len > 0 && isspace(vbuf[--len]))
2005                                 vbuf[len] = '\0';
2006                         dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
2007                 }
2008         }
2009
2010         return match_key(rules, cur, value);
2011 }
2012
2013 enum escape_type {
2014         ESCAPE_UNSET,
2015         ESCAPE_NONE,
2016         ESCAPE_REPLACE,
2017 };
2018
2019 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
2020 {
2021         struct token *cur;
2022         struct token *rule;
2023         enum escape_type esc = ESCAPE_UNSET;
2024         bool can_set_name;
2025
2026         if (rules->tokens == NULL)
2027                 return -1;
2028
2029         can_set_name = ((strcmp(udev_device_get_action(event->dev), "remove") != 0) &&
2030                         (major(udev_device_get_devnum(event->dev)) > 0 ||
2031                          strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
2032
2033         /* loop through token list, match, run actions or forward to next rule */
2034         cur = &rules->tokens[0];
2035         rule = cur;
2036         while (1) {
2037                 dump_token(rules, cur);
2038                 switch (cur->type) {
2039                 case TK_RULE:
2040                         /* current rule */
2041                         rule = cur;
2042                         /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2043                         if (!can_set_name && rule->rule.flags)
2044                                 goto nomatch;
2045                         esc = ESCAPE_UNSET;
2046                         break;
2047                 case TK_M_ACTION:
2048                         if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2049                                 goto nomatch;
2050                         break;
2051                 case TK_M_DEVPATH:
2052                         if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2053                                 goto nomatch;
2054                         break;
2055                 case TK_M_KERNEL:
2056                         if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2057                                 goto nomatch;
2058                         break;
2059                 case TK_M_DEVLINK:
2060                         {
2061                                 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2062                                 struct udev_list_entry *list_entry;
2063                                 int match = 0;
2064
2065                                 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2066                                         const char *devlink;
2067
2068                                         devlink =  &udev_list_entry_get_name(list_entry)[devlen];
2069                                         if (match_key(rules, cur, devlink) == 0) {
2070                                                 match = 1;
2071                                                 break;
2072                                         }
2073                                 }
2074                                 if (!match)
2075                                         goto nomatch;
2076                                 break;
2077                         }
2078                 case TK_M_NAME:
2079                         if (match_key(rules, cur, event->name) != 0)
2080                                 goto nomatch;
2081                         break;
2082                 case TK_M_ENV:
2083                         {
2084                                 const char *key_name = &rules->buf[cur->key.attr_off];
2085                                 const char *value;
2086
2087                                 value = udev_device_get_property_value(event->dev, key_name);
2088                                 if (value == NULL) {
2089                                         dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2090                                         value = "";
2091                                 }
2092                                 if (match_key(rules, cur, value))
2093                                         goto nomatch;
2094                                 break;
2095                         }
2096                 case TK_M_SUBSYSTEM:
2097                         if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2098                                 goto nomatch;
2099                         break;
2100                 case TK_M_DRIVER:
2101                         if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2102                                 goto nomatch;
2103                         break;
2104                 case TK_M_WAITFOR:
2105                         {
2106                                 char filename[UTIL_PATH_SIZE];
2107                                 int found;
2108
2109                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2110                                 found = (wait_for_file(event->dev, filename, 10) == 0);
2111                                 if (!found && (cur->key.op != OP_NOMATCH))
2112                                         goto nomatch;
2113                                 break;
2114                         }
2115                 case TK_M_ATTR:
2116                         if (match_attr(rules, event->dev, event, cur) != 0)
2117                                 goto nomatch;
2118                         break;
2119                 case TK_M_KERNELS:
2120                 case TK_M_SUBSYSTEMS:
2121                 case TK_M_DRIVERS:
2122                 case TK_M_ATTRS:
2123                         {
2124                                 struct token *next;
2125
2126                                 /* get whole sequence of parent matches */
2127                                 next = cur;
2128                                 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2129                                         next++;
2130
2131                                 /* loop over parents */
2132                                 event->dev_parent = event->dev;
2133                                 while (1) {
2134                                         struct token *key;
2135
2136                                         dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2137                                         /* loop over sequence of parent match keys */
2138                                         for (key = cur; key < next; key++ ) {
2139                                                 dump_token(rules, key);
2140                                                 switch(key->type) {
2141                                                 case TK_M_KERNELS:
2142                                                         if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2143                                                                 goto try_parent;
2144                                                         break;
2145                                                 case TK_M_SUBSYSTEMS:
2146                                                         if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2147                                                                 goto try_parent;
2148                                                         break;
2149                                                 case TK_M_DRIVERS:
2150                                                         if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2151                                                                 goto try_parent;
2152                                                         break;
2153                                                 case TK_M_ATTRS:
2154                                                         if (match_attr(rules, event->dev_parent, event, key) != 0)
2155                                                                 goto try_parent;
2156                                                         break;
2157                                                 default:
2158                                                         goto nomatch;
2159                                                 }
2160                                                 dbg(event->udev, "parent key matched\n");
2161                                         }
2162                                         dbg(event->udev, "all parent keys matched\n");
2163                                         /* all keys matched */
2164                                         break;
2165
2166                                 try_parent:
2167                                         event->dev_parent = udev_device_get_parent(event->dev_parent);
2168                                         if (event->dev_parent == NULL)
2169                                                 goto nomatch;
2170                                 }
2171                                 /* move behind our sequence of parent match keys */
2172                                 cur = next;
2173                                 continue;
2174                         }
2175                 case TK_M_TEST:
2176                         {
2177                                 char filename[UTIL_PATH_SIZE];
2178                                 struct stat statbuf;
2179                                 int match;
2180
2181                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2182                                 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2183                                         if (filename[0] != '/') {
2184                                                 char tmp[UTIL_PATH_SIZE];
2185
2186                                                 util_strscpy(tmp, sizeof(tmp), filename);
2187                                                 util_strscpyl(filename, sizeof(filename),
2188                                                               udev_device_get_syspath(event->dev), "/", tmp, NULL);
2189                                         }
2190                                 }
2191                                 attr_subst_subdir(filename, sizeof(filename));
2192
2193                                 match = (stat(filename, &statbuf) == 0);
2194                                 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2195                                 if (match && cur->key.mode > 0) {
2196                                         match = ((statbuf.st_mode & cur->key.mode) > 0);
2197                                         dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2198                                             match ? "matches" : "does not match", cur->key.mode);
2199                                 }
2200                                 if (match && cur->key.op == OP_NOMATCH)
2201                                         goto nomatch;
2202                                 if (!match && cur->key.op == OP_MATCH)
2203                                         goto nomatch;
2204                                 break;
2205                         }
2206                 case TK_M_PROGRAM:
2207                         {
2208                                 char program[UTIL_PATH_SIZE];
2209                                 char **envp;
2210                                 char result[UTIL_PATH_SIZE];
2211
2212                                 free(event->program_result);
2213                                 event->program_result = NULL;
2214                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2215                                 envp = udev_device_get_properties_envp(event->dev);
2216                                 info(event->udev, "PROGRAM '%s' %s:%u\n",
2217                                      program,
2218                                      &rules->buf[rule->rule.filename_off],
2219                                      rule->rule.filename_line);
2220                                 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL, NULL) != 0) {
2221                                         if (cur->key.op != OP_NOMATCH)
2222                                                 goto nomatch;
2223                                 } else {
2224                                         int count;
2225
2226                                         util_remove_trailing_chars(result, '\n');
2227                                         if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2228                                                 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2229                                                 if (count > 0)
2230                                                         info(event->udev, "%i character(s) replaced\n" , count);
2231                                         }
2232                                         event->program_result = strdup(result);
2233                                         dbg(event->udev, "storing result '%s'\n", event->program_result);
2234                                         if (cur->key.op == OP_NOMATCH)
2235                                                 goto nomatch;
2236                                 }
2237                                 break;
2238                         }
2239                 case TK_M_IMPORT_FILE:
2240                         {
2241                                 char import[UTIL_PATH_SIZE];
2242
2243                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2244                                 if (import_file_into_properties(event->dev, import) != 0)
2245                                         if (cur->key.op != OP_NOMATCH)
2246                                                 goto nomatch;
2247                                 break;
2248                         }
2249                 case TK_M_IMPORT_PROG:
2250                         {
2251                                 char import[UTIL_PATH_SIZE];
2252
2253                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2254                                 info(event->udev, "IMPORT '%s' %s:%u\n",
2255                                      import,
2256                                      &rules->buf[rule->rule.filename_off],
2257                                      rule->rule.filename_line);
2258                                 if (import_program_into_properties(event->dev, import) != 0)
2259                                         if (cur->key.op != OP_NOMATCH)
2260                                                 goto nomatch;
2261                                 break;
2262                         }
2263                 case TK_M_IMPORT_DB:
2264                         {
2265                                 const char *key = &rules->buf[cur->key.value_off];
2266                                 const char *value;
2267
2268                                 value = udev_device_get_property_value(event->dev_db, key);
2269                                 if (value != NULL) {
2270                                         struct udev_list_entry *entry;
2271
2272                                         entry = udev_device_add_property(event->dev, key, value);
2273                                         udev_list_entry_set_flags(entry, 1);
2274                                 } else {
2275                                         if (cur->key.op != OP_NOMATCH)
2276                                                 goto nomatch;
2277                                 }
2278                                 break;
2279                         }
2280                 case TK_M_IMPORT_PARENT:
2281                         {
2282                                 char import[UTIL_PATH_SIZE];
2283
2284                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2285                                 if (import_parent_into_properties(event->dev, import) != 0)
2286                                         if (cur->key.op != OP_NOMATCH)
2287                                                 goto nomatch;
2288                                 break;
2289                         }
2290                 case TK_M_RESULT:
2291                         if (match_key(rules, cur, event->program_result) != 0)
2292                                 goto nomatch;
2293                         break;
2294                 case TK_A_STRING_ESCAPE_NONE:
2295                         esc = ESCAPE_NONE;
2296                         break;
2297                 case TK_A_STRING_ESCAPE_REPLACE:
2298                         esc = ESCAPE_REPLACE;
2299                         break;
2300                 case TK_A_INOTIFY_WATCH:
2301                         event->inotify_watch = cur->key.watch;
2302                         break;
2303                 case TK_A_DEVLINK_PRIO:
2304                         udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2305                         break;
2306                 case TK_A_OWNER:
2307                         {
2308                                 char owner[UTIL_NAME_SIZE];
2309
2310                                 if (event->owner_final)
2311                                         break;
2312                                 if (cur->key.op == OP_ASSIGN_FINAL)
2313                                         event->owner_final = 1;
2314                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2315                                 event->uid = util_lookup_user(event->udev, owner);
2316                                 info(event->udev, "OWNER %u %s:%u\n",
2317                                      event->uid,
2318                                      &rules->buf[rule->rule.filename_off],
2319                                      rule->rule.filename_line);
2320                                 break;
2321                         }
2322                 case TK_A_GROUP:
2323                         {
2324                                 char group[UTIL_NAME_SIZE];
2325
2326                                 if (event->group_final)
2327                                         break;
2328                                 if (cur->key.op == OP_ASSIGN_FINAL)
2329                                         event->group_final = 1;
2330                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2331                                 event->gid = util_lookup_group(event->udev, group);
2332                                 info(event->udev, "GROUP %u %s:%u\n",
2333                                      event->gid,
2334                                      &rules->buf[rule->rule.filename_off],
2335                                      rule->rule.filename_line);
2336                                 break;
2337                         }
2338                 case TK_A_MODE:
2339                         {
2340                                 char mode[UTIL_NAME_SIZE];
2341                                 char *endptr;
2342
2343                                 if (event->mode_final)
2344                                         break;
2345                                 if (cur->key.op == OP_ASSIGN_FINAL)
2346                                         event->mode_final = 1;
2347                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode, sizeof(mode));
2348                                 event->mode = strtol(mode, &endptr, 8);
2349                                 if (endptr[0] != '\0') {
2350                                         err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2351                                         event->mode = 0660;
2352                                 }
2353                                 info(event->udev, "MODE %#o %s:%u\n",
2354                                      event->mode,
2355                                      &rules->buf[rule->rule.filename_off],
2356                                      rule->rule.filename_line);
2357                                 break;
2358                         }
2359                 case TK_A_OWNER_ID:
2360                         if (event->owner_final)
2361                                 break;
2362                         if (cur->key.op == OP_ASSIGN_FINAL)
2363                                 event->owner_final = 1;
2364                         event->uid = cur->key.uid;
2365                         info(event->udev, "OWNER %u %s:%u\n",
2366                              event->uid,
2367                              &rules->buf[rule->rule.filename_off],
2368                              rule->rule.filename_line);
2369                         break;
2370                 case TK_A_GROUP_ID:
2371                         if (event->group_final)
2372                                 break;
2373                         if (cur->key.op == OP_ASSIGN_FINAL)
2374                                 event->group_final = 1;
2375                         event->gid = cur->key.gid;
2376                         info(event->udev, "GROUP %u %s:%u\n",
2377                              event->gid,
2378                              &rules->buf[rule->rule.filename_off],
2379                              rule->rule.filename_line);
2380                         break;
2381                 case TK_A_MODE_ID:
2382                         if (event->mode_final)
2383                                 break;
2384                         if (cur->key.op == OP_ASSIGN_FINAL)
2385                                 event->mode_final = 1;
2386                         event->mode = cur->key.mode;
2387                         info(event->udev, "MODE %#o %s:%u\n",
2388                              event->mode,
2389                              &rules->buf[rule->rule.filename_off],
2390                              rule->rule.filename_line);
2391                         break;
2392                 case TK_A_ENV:
2393                         {
2394                                 const char *name = &rules->buf[cur->key.attr_off];
2395                                 char *value = &rules->buf[cur->key.value_off];
2396
2397                                 if (value[0] != '\0') {
2398                                         char temp_value[UTIL_NAME_SIZE];
2399                                         struct udev_list_entry *entry;
2400
2401                                         udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2402                                         entry = udev_device_add_property(event->dev, name, temp_value);
2403                                         /* store in db, skip private keys */
2404                                         if (name[0] != '.')
2405                                                 udev_list_entry_set_flags(entry, 1);
2406                                 } else {
2407                                         udev_device_add_property(event->dev, name, NULL);
2408                                 }
2409                                 break;
2410                         }
2411                 case TK_A_NAME:
2412                         {
2413                                 const char *name  = &rules->buf[cur->key.value_off];
2414                                 char name_str[UTIL_PATH_SIZE];
2415                                 int count;
2416
2417                                 if (event->name_final)
2418                                         break;
2419                                 if (cur->key.op == OP_ASSIGN_FINAL)
2420                                         event->name_final = 1;
2421                                 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2422                                 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2423                                         count = udev_util_replace_chars(name_str, "/");
2424                                         if (count > 0)
2425                                                 info(event->udev, "%i character(s) replaced\n", count);
2426                                 }
2427                                 free(event->name);
2428                                 event->name = strdup(name_str);
2429                                 info(event->udev, "NAME '%s' %s:%u\n",
2430                                      event->name,
2431                                      &rules->buf[rule->rule.filename_off],
2432                                      rule->rule.filename_line);
2433                                 break;
2434                         }
2435                 case TK_A_DEVLINK:
2436                         {
2437                                 char temp[UTIL_PATH_SIZE];
2438                                 char filename[UTIL_PATH_SIZE];
2439                                 char *pos, *next;
2440                                 int count = 0;
2441
2442                                 if (event->devlink_final)
2443                                         break;
2444                                 if (major(udev_device_get_devnum(event->dev)) == 0)
2445                                         break;
2446                                 if (cur->key.op == OP_ASSIGN_FINAL)
2447                                         event->devlink_final = 1;
2448                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2449                                         udev_device_cleanup_devlinks_list(event->dev);
2450
2451                                 /* allow  multiple symlinks separated by spaces */
2452                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2453                                 if (esc == ESCAPE_UNSET)
2454                                         count = udev_util_replace_chars(temp, "/ ");
2455                                 else if (esc == ESCAPE_REPLACE)
2456                                         count = udev_util_replace_chars(temp, "/");
2457                                 if (count > 0)
2458                                         info(event->udev, "%i character(s) replaced\n" , count);
2459                                 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2460                                 pos = temp;
2461                                 while (isspace(pos[0]))
2462                                         pos++;
2463                                 next = strchr(pos, ' ');
2464                                 while (next != NULL) {
2465                                         next[0] = '\0';
2466                                         info(event->udev, "LINK '%s' %s:%u\n", pos,
2467                                              &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2468                                         util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2469                                         udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2470                                         while (isspace(next[1]))
2471                                                 next++;
2472                                         pos = &next[1];
2473                                         next = strchr(pos, ' ');
2474                                 }
2475                                 if (pos[0] != '\0') {
2476                                         info(event->udev, "LINK '%s' %s:%u\n", pos,
2477                                              &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2478                                         util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2479                                         udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2480                                 }
2481                         }
2482                         break;
2483                 case TK_A_EVENT_TIMEOUT:
2484                         udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2485                         break;
2486                 case TK_A_ATTR:
2487                         {
2488                                 const char *key_name = &rules->buf[cur->key.attr_off];
2489                                 char attr[UTIL_PATH_SIZE];
2490                                 char value[UTIL_NAME_SIZE];
2491                                 FILE *f;
2492
2493                                 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2494                                         util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2495                                 attr_subst_subdir(attr, sizeof(attr));
2496
2497                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2498                                 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2499                                      &rules->buf[rule->rule.filename_off],
2500                                      rule->rule.filename_line);
2501                                 f = fopen(attr, "w");
2502                                 if (f != NULL) {
2503                                         if (fprintf(f, "%s", value) <= 0)
2504                                                 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2505                                         fclose(f);
2506                                 } else {
2507                                         err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2508                                 }
2509                                 break;
2510                         }
2511                 case TK_A_RUN:
2512                         {
2513                                 struct udev_list_entry *list_entry;
2514
2515                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2516                                         udev_list_cleanup_entries(event->udev, &event->run_list);
2517                                 info(event->udev, "RUN '%s' %s:%u\n",
2518                                      &rules->buf[cur->key.value_off],
2519                                      &rules->buf[rule->rule.filename_off],
2520                                      rule->rule.filename_line);
2521                                 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2522                                                                  &rules->buf[cur->key.value_off], NULL, 1, 0);
2523                                 if (cur->key.fail_on_error)
2524                                         udev_list_entry_set_flags(list_entry, 1);
2525                                 break;
2526                         }
2527                 case TK_A_GOTO:
2528                         if (cur->key.rule_goto == 0)
2529                                 break;
2530                         cur = &rules->tokens[cur->key.rule_goto];
2531                         continue;
2532                 case TK_END:
2533                         return 0;
2534
2535                 case TK_M_PARENTS_MIN:
2536                 case TK_M_PARENTS_MAX:
2537                 case TK_M_MAX:
2538                 case TK_UNSET:
2539                         err(rules->udev, "wrong type %u\n", cur->type);
2540                         goto nomatch;
2541                 }
2542
2543                 cur++;
2544                 continue;
2545         nomatch:
2546                 /* fast-forward to next rule */
2547                 cur = rule + rule->rule.token_count;
2548                 dbg(rules->udev, "forward to rule: %u\n",
2549                                  (unsigned int) (cur - rules->tokens));
2550         }
2551 }