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