udev/udev-rules.c

   1 /*
   2  * Copyright (C) 2003-2009 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_PARENT,             /* val */
 145         TK_M_RESULT,                    /* val */
 146         TK_M_MAX,
 147
 148         TK_A_STRING_ESCAPE_NONE,
 149         TK_A_STRING_ESCAPE_REPLACE,
 150         TK_A_INOTIFY_WATCH,             /* int */
 151         TK_A_NUM_FAKE_PART,             /* 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_IGNORE_REMOVE,
 164         TK_A_ATTR,                      /* val, attr */
 165         TK_A_RUN,                       /* val, bool */
 166         TK_A_GOTO,                      /* size_t */
 167
 168         TK_END,
 169 };
 170
 171 /* we try to pack stuff in a way that we take only 12 bytes per token */
 172 struct token {
 173         union {
 174                 unsigned char type;             /* same as in rule and key */
 175                 struct {
 176                         enum token_type type:8;
 177                         unsigned int flags:8;
 178                         unsigned short token_count;
 179                         unsigned int label_off;
 180                         unsigned short filename_off;
 181                         unsigned short filename_line;
 182                 } rule;
 183                 struct {
 184                         enum token_type type:8;
 185                         enum operation_type op:8;
 186                         enum string_glob_type glob:8;
 187                         enum string_subst_type subst:4;
 188                         enum string_subst_type attrsubst:4;
 189                         unsigned int value_off;
 190                         union {
 191                                 unsigned int attr_off;
 192                                 int devlink_unique;
 193                                 int fail_on_error;
 194                                 unsigned int rule_goto;
 195                                 mode_t  mode;
 196                                 uid_t uid;
 197                                 gid_t gid;
 198                                 int num_fake_part;
 199                                 int devlink_prio;
 200                                 int event_timeout;
 201                                 int watch;
 202                         };
 203                 } key;
 204         };
 205 };
 206
 207 #define MAX_TK          64
 208 struct rule_tmp {
 209         struct udev_rules *rules;
 210         struct token rule;
 211         struct token token[MAX_TK];
 212         unsigned int token_cur;
 213 };
 214
 215 #ifdef ENABLE_DEBUG
 216 static const char *operation_str(enum operation_type type)
 217 {
 218         static const char *operation_strs[] = {
 219                 [OP_UNSET] =            "UNSET",
 220                 [OP_MATCH] =            "match",
 221                 [OP_NOMATCH] =          "nomatch",
 222                 [OP_MATCH_MAX] =        "MATCH_MAX",
 223
 224                 [OP_ADD] =              "add",
 225                 [OP_ASSIGN] =           "assign",
 226                 [OP_ASSIGN_FINAL] =     "assign-final",
 227 }       ;
 228
 229         return operation_strs[type];
 230 }
 231
 232 static const char *string_glob_str(enum string_glob_type type)
 233 {
 234         static const char *string_glob_strs[] = {
 235                 [GL_UNSET] =            "UNSET",
 236                 [GL_PLAIN] =            "plain",
 237                 [GL_GLOB] =             "glob",
 238                 [GL_SPLIT] =            "split",
 239                 [GL_SPLIT_GLOB] =       "split-glob",
 240                 [GL_SOMETHING] =        "split-glob",
 241         };
 242
 243         return string_glob_strs[type];
 244 }
 245
 246 static const char *token_str(enum token_type type)
 247 {
 248         static const char *token_strs[] = {
 249                 [TK_UNSET] =                    "UNSET",
 250                 [TK_RULE] =                     "RULE",
 251
 252                 [TK_M_ACTION] =                 "M ACTION",
 253                 [TK_M_DEVPATH] =                "M DEVPATH",
 254                 [TK_M_KERNEL] =                 "M KERNEL",
 255                 [TK_M_DEVLINK] =                "M DEVLINK",
 256                 [TK_M_NAME] =                   "M NAME",
 257                 [TK_M_ENV] =                    "M ENV",
 258                 [TK_M_SUBSYSTEM] =              "M SUBSYSTEM",
 259                 [TK_M_DRIVER] =                 "M DRIVER",
 260                 [TK_M_WAITFOR] =                "M WAITFOR",
 261                 [TK_M_ATTR] =                   "M ATTR",
 262
 263                 [TK_M_PARENTS_MIN] =            "M PARENTS_MIN",
 264                 [TK_M_KERNELS] =                "M KERNELS",
 265                 [TK_M_SUBSYSTEMS] =             "M SUBSYSTEMS",
 266                 [TK_M_DRIVERS] =                "M DRIVERS",
 267                 [TK_M_ATTRS] =                  "M ATTRS",
 268                 [TK_M_PARENTS_MAX] =            "M PARENTS_MAX",
 269
 270                 [TK_M_TEST] =                   "M TEST",
 271                 [TK_M_PROGRAM] =                "M PROGRAM",
 272                 [TK_M_IMPORT_FILE] =            "M IMPORT_FILE",
 273                 [TK_M_IMPORT_PROG] =            "M IMPORT_PROG",
 274                 [TK_M_IMPORT_PARENT] =          "M IMPORT_PARENT",
 275                 [TK_M_RESULT] =                 "M RESULT",
 276                 [TK_M_MAX] =                    "M MAX",
 277
 278                 [TK_A_STRING_ESCAPE_NONE] =     "A STRING_ESCAPE_NONE",
 279                 [TK_A_STRING_ESCAPE_REPLACE] =  "A STRING_ESCAPE_REPLACE",
 280                 [TK_A_INOTIFY_WATCH] =          "A INOTIFY_WATCH",
 281                 [TK_A_NUM_FAKE_PART] =          "A NUM_FAKE_PART",
 282                 [TK_A_DEVLINK_PRIO] =           "A DEVLINK_PRIO",
 283                 [TK_A_OWNER] =                  "A OWNER",
 284                 [TK_A_GROUP] =                  "A GROUP",
 285                 [TK_A_MODE] =                   "A MODE",
 286                 [TK_A_OWNER_ID] =               "A OWNER_ID",
 287                 [TK_A_GROUP_ID] =               "A GROUP_ID",
 288                 [TK_A_MODE_ID] =                "A MODE_ID",
 289                 [TK_A_ENV] =                    "A ENV",
 290                 [TK_A_NAME] =                   "A NAME",
 291                 [TK_A_DEVLINK] =                "A DEVLINK",
 292                 [TK_A_EVENT_TIMEOUT] =          "A EVENT_TIMEOUT",
 293                 [TK_A_IGNORE_REMOVE] =          "A IGNORE_REMOVE",
 294                 [TK_A_ATTR] =                   "A ATTR",
 295                 [TK_A_RUN] =                    "A RUN",
 296                 [TK_A_GOTO] =                   "A GOTO",
 297
 298                 [TK_END] =                      "END",
 299         };
 300
 301         return token_strs[type];
 302 }
 303
 304 static void dump_token(struct udev_rules *rules, struct token *token)
 305 {
 306         enum token_type type = token->type;
 307         enum operation_type op = token->key.op;
 308         enum string_glob_type glob = token->key.glob;
 309         const char *value = &rules->buf[token->key.value_off];
 310         const char *attr = &rules->buf[token->key.attr_off];
 311
 312         switch (type) {
 313         case TK_RULE:
 314                 {
 315                         const char *tks_ptr = (char *)rules->tokens;
 316                         const char *tk_ptr = (char *)token;
 317                         unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
 318
 319                         dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
 320                             &rules->buf[token->rule.filename_off], token->rule.filename_line,
 321                             idx, token->rule.token_count,
 322                             &rules->buf[token->rule.label_off],
 323                             token->rule.flags);
 324                         break;
 325                 }
 326         case TK_M_ACTION:
 327         case TK_M_DEVPATH:
 328         case TK_M_KERNEL:
 329         case TK_M_SUBSYSTEM:
 330         case TK_M_DRIVER:
 331         case TK_M_WAITFOR:
 332         case TK_M_DEVLINK:
 333         case TK_M_NAME:
 334         case TK_M_KERNELS:
 335         case TK_M_SUBSYSTEMS:
 336         case TK_M_DRIVERS:
 337         case TK_M_PROGRAM:
 338         case TK_M_IMPORT_FILE:
 339         case TK_M_IMPORT_PROG:
 340         case TK_M_IMPORT_PARENT:
 341         case TK_M_RESULT:
 342         case TK_A_NAME:
 343         case TK_A_DEVLINK:
 344         case TK_A_OWNER:
 345         case TK_A_GROUP:
 346         case TK_A_MODE:
 347         case TK_A_RUN:
 348                 dbg(rules->udev, "%s %s '%s'(%s)\n",
 349                     token_str(type), operation_str(op), value, string_glob_str(glob));
 350                 break;
 351         case TK_M_ATTR:
 352         case TK_M_ATTRS:
 353         case TK_M_ENV:
 354         case TK_A_ATTR:
 355         case TK_A_ENV:
 356                 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
 357                     token_str(type), operation_str(op), attr, value, string_glob_str(glob));
 358                 break;
 359         case TK_A_STRING_ESCAPE_NONE:
 360         case TK_A_STRING_ESCAPE_REPLACE:
 361         case TK_A_IGNORE_REMOVE:
 362                 dbg(rules->udev, "%s\n", token_str(type));
 363                 break;
 364         case TK_M_TEST:
 365                 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
 366                     token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
 367                 break;
 368         case TK_A_INOTIFY_WATCH:
 369                 dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch);
 370                 break;
 371         case TK_A_NUM_FAKE_PART:
 372                 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
 373                 break;
 374         case TK_A_DEVLINK_PRIO:
 375                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
 376                 break;
 377         case TK_A_OWNER_ID:
 378                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
 379                 break;
 380         case TK_A_GROUP_ID:
 381                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
 382                 break;
 383         case TK_A_MODE_ID:
 384                 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
 385                 break;
 386         case TK_A_EVENT_TIMEOUT:
 387                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
 388                 break;
 389         case TK_A_GOTO:
 390                 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
 391                 break;
 392         case TK_END:
 393                 dbg(rules->udev, "* %s\n", token_str(type));
 394                 break;
 395         case TK_M_PARENTS_MIN:
 396         case TK_M_PARENTS_MAX:
 397         case TK_M_MAX:
 398         case TK_UNSET:
 399                 dbg(rules->udev, "unknown type %u\n", type);
 400                 break;
 401         }
 402 }
 403
 404 static void dump_rules(struct udev_rules *rules)
 405 {
 406         unsigned int i;
 407
 408         dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
 409             rules->token_cur,
 410             rules->token_cur * sizeof(struct token),
 411             rules->buf_count,
 412             rules->buf_cur);
 413         for(i = 0; i < rules->token_cur; i++)
 414                 dump_token(rules, &rules->tokens[i]);
 415 }
 416 #else
 417 static inline const char *operation_str(enum operation_type type) { return NULL; }
 418 static inline const char *token_str(enum token_type type) { return NULL; }
 419 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
 420 static inline void dump_rules(struct udev_rules *rules) {}
 421 #endif /* ENABLE_DEBUG */
 422
 423 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
 424 {
 425         int off;
 426
 427         /* grow buffer if needed */
 428         if (rules->buf_cur + bytes+1 >= rules->buf_max) {
 429                 char *buf;
 430                 unsigned int add;
 431
 432                 /* double the buffer size */
 433                 add = rules->buf_max;
 434                 if (add < bytes * 8)
 435                         add = bytes * 8;
 436
 437                 buf = realloc(rules->buf, rules->buf_max + add);
 438                 if (buf == NULL)
 439                         return -1;
 440                 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
 441                 rules->buf = buf;
 442                 rules->buf_max += add;
 443         }
 444         off = rules->buf_cur;
 445         memcpy(&rules->buf[rules->buf_cur], str, bytes);
 446         rules->buf_cur += bytes;
 447         rules->buf_count++;
 448         return off;
 449 }
 450
 451 static int add_string(struct udev_rules *rules, const char *str)
 452 {
 453         unsigned int node_idx;
 454         struct trie_node *new_node;
 455         unsigned int new_node_idx;
 456         unsigned char key;
 457         unsigned short len;
 458         unsigned int depth;
 459         unsigned int off;
 460         struct trie_node *parent;
 461
 462         /* walk trie, start from last character of str to find matching tails */
 463         len = strlen(str);
 464         key = str[len-1];
 465         node_idx = 0;
 466         for (depth = 0; depth <= len; depth++) {
 467                 struct trie_node *node;
 468                 unsigned int child_idx;
 469
 470                 node = &rules->trie_nodes[node_idx];
 471                 off = node->value_off + node->value_len - len;
 472
 473                 /* match against current node */
 474                 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
 475                         return off;
 476
 477                 /* lookup child node */
 478                 key = str[len - 1 - depth];
 479                 child_idx = node->child_idx;
 480                 while (child_idx > 0) {
 481                         struct trie_node *child;
 482
 483                         child = &rules->trie_nodes[child_idx];
 484                         if (child->key == key)
 485                                 break;
 486                         child_idx = child->next_child_idx;
 487                 }
 488                 if (child_idx == 0)
 489                         break;
 490                 node_idx = child_idx;
 491         }
 492
 493         /* string not found, add it */
 494         off = add_new_string(rules, str, len + 1);
 495
 496         /* grow trie nodes if needed */
 497         if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
 498                 struct trie_node *nodes;
 499                 unsigned int add;
 500
 501                 /* double the buffer size */
 502                 add = rules->trie_nodes_max;
 503                 if (add < 8)
 504                         add = 8;
 505
 506                 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
 507                 if (nodes == NULL)
 508                         return -1;
 509                 dbg(rules->udev, "extend trie nodes from %u to %u\n",
 510                     rules->trie_nodes_max, rules->trie_nodes_max + add);
 511                 rules->trie_nodes = nodes;
 512                 rules->trie_nodes_max += add;
 513         }
 514
 515         /* get a new node */
 516         new_node_idx = rules->trie_nodes_cur;
 517         rules->trie_nodes_cur++;
 518         new_node = &rules->trie_nodes[new_node_idx];
 519         memset(new_node, 0x00, sizeof(struct trie_node));
 520         new_node->value_off = off;
 521         new_node->value_len = len;
 522         new_node->key = key;
 523
 524         /* join the parent's child list */
 525         parent = &rules->trie_nodes[node_idx];
 526         if (parent->child_idx == 0) {
 527                 parent->child_idx = new_node_idx;
 528         } else {
 529                 struct trie_node *last_child;
 530
 531                 last_child = &rules->trie_nodes[parent->last_child_idx];
 532                 last_child->next_child_idx = new_node_idx;
 533         }
 534         parent->last_child_idx = new_node_idx;
 535         return off;
 536 }
 537
 538 static int add_token(struct udev_rules *rules, struct token *token)
 539 {
 540         /* grow buffer if needed */
 541         if (rules->token_cur+1 >= rules->token_max) {
 542                 struct token *tokens;
 543                 unsigned int add;
 544
 545                 /* double the buffer size */
 546                 add = rules->token_max;
 547                 if (add < 8)
 548                         add = 8;
 549
 550                 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
 551                 if (tokens == NULL)
 552                         return -1;
 553                 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
 554                 rules->tokens = tokens;
 555                 rules->token_max += add;
 556         }
 557         memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
 558         rules->token_cur++;
 559         return 0;
 560 }
 561
 562 static uid_t add_uid(struct udev_rules *rules, const char *owner)
 563 {
 564         unsigned int i;
 565         uid_t uid;
 566         unsigned int off;
 567
 568         /* lookup, if we know it already */
 569         for (i = 0; i < rules->uids_cur; i++) {
 570                 off = rules->uids[i].name_off;
 571                 if (strcmp(&rules->buf[off], owner) == 0) {
 572                         uid = rules->uids[i].uid;
 573                         dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
 574                         return uid;
 575                 }
 576         }
 577         uid = util_lookup_user(rules->udev, owner);
 578
 579         /* grow buffer if needed */
 580         if (rules->uids_cur+1 >= rules->uids_max) {
 581                 struct uid_gid *uids;
 582                 unsigned int add;
 583
 584                 /* double the buffer size */
 585                 add = rules->uids_max;
 586                 if (add < 1)
 587                         add = 8;
 588
 589                 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
 590                 if (uids == NULL)
 591                         return uid;
 592                 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
 593                 rules->uids = uids;
 594                 rules->uids_max += add;
 595         }
 596         rules->uids[rules->uids_cur].uid = uid;
 597         off = add_string(rules, owner);
 598         if (off <= 0)
 599                 return uid;
 600         rules->uids[rules->uids_cur].name_off = off;
 601         rules->uids_cur++;
 602         return uid;
 603 }
 604
 605 static gid_t add_gid(struct udev_rules *rules, const char *group)
 606 {
 607         unsigned int i;
 608         gid_t gid;
 609         unsigned int off;
 610
 611         /* lookup, if we know it already */
 612         for (i = 0; i < rules->gids_cur; i++) {
 613                 off = rules->gids[i].name_off;
 614                 if (strcmp(&rules->buf[off], group) == 0) {
 615                         gid = rules->gids[i].gid;
 616                         dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
 617                         return gid;
 618                 }
 619         }
 620         gid = util_lookup_group(rules->udev, group);
 621
 622         /* grow buffer if needed */
 623         if (rules->gids_cur+1 >= rules->gids_max) {
 624                 struct uid_gid *gids;
 625                 unsigned int add;
 626
 627                 /* double the buffer size */
 628                 add = rules->gids_max;
 629                 if (add < 1)
 630                         add = 8;
 631
 632                 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
 633                 if (gids == NULL)
 634                         return gid;
 635                 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
 636                 rules->gids = gids;
 637                 rules->gids_max += add;
 638         }
 639         rules->gids[rules->gids_cur].gid = gid;
 640         off = add_string(rules, group);
 641         if (off <= 0)
 642                 return gid;
 643         rules->gids[rules->gids_cur].name_off = off;
 644         rules->gids_cur++;
 645         return gid;
 646 }
 647
 648 static int import_property_from_string(struct udev_device *dev, char *line)
 649 {
 650         struct udev *udev = udev_device_get_udev(dev);
 651         char *key;
 652         char *val;
 653         size_t len;
 654
 655         /* find key */
 656         key = line;
 657         while (isspace(key[0]))
 658                 key++;
 659
 660         /* comment or empty line */
 661         if (key[0] == '#' || key[0] == '\0')
 662                 return -1;
 663
 664         /* split key/value */
 665         val = strchr(key, '=');
 666         if (val == NULL)
 667                 return -1;
 668         val[0] = '\0';
 669         val++;
 670
 671         /* find value */
 672         while (isspace(val[0]))
 673                 val++;
 674
 675         /* terminate key */
 676         len = strlen(key);
 677         if (len == 0)
 678                 return -1;
 679         while (isspace(key[len-1]))
 680                 len--;
 681         key[len] = '\0';
 682
 683         /* terminate value */
 684         len = strlen(val);
 685         if (len == 0)
 686                 return -1;
 687         while (isspace(val[len-1]))
 688                 len--;
 689         val[len] = '\0';
 690
 691         if (len == 0)
 692                 return -1;
 693
 694         /* unquote */
 695         if (val[0] == '"' || val[0] == '\'') {
 696                 if (val[len-1] != val[0]) {
 697                         info(udev, "inconsistent quoting: '%s', skip\n", line);
 698                         return -1;
 699                 }
 700                 val[len-1] = '\0';
 701                 val++;
 702         }
 703
 704         dbg(udev, "adding '%s'='%s'\n", key, val);
 705
 706         /* handle device, renamed by external tool, returning new path */
 707         if (strcmp(key, "DEVPATH") == 0) {
 708                 char syspath[UTIL_PATH_SIZE];
 709
 710                 info(udev, "updating devpath from '%s' to '%s'\n",
 711                      udev_device_get_devpath(dev), val);
 712                 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL);
 713                 udev_device_set_syspath(dev, syspath);
 714         } else {
 715                 struct udev_list_entry *entry;
 716
 717                 entry = udev_device_add_property(dev, key, val);
 718                 /* store in db, skip private keys */
 719                 if (key[0] != '.')
 720                         udev_list_entry_set_flag(entry, 1);
 721         }
 722         return 0;
 723 }
 724
 725 static int import_file_into_properties(struct udev_device *dev, const char *filename)
 726 {
 727         FILE *f;
 728         char line[UTIL_LINE_SIZE];
 729
 730         f = fopen(filename, "r");
 731         if (f == NULL)
 732                 return -1;
 733         while (fgets(line, sizeof(line), f) != NULL)
 734                 import_property_from_string(dev, line);
 735         fclose(f);
 736         return 0;
 737 }
 738
 739 static int import_program_into_properties(struct udev_device *dev, const char *program)
 740 {
 741         struct udev *udev = udev_device_get_udev(dev);
 742         char **envp;
 743         char result[4096];
 744         size_t reslen;
 745         char *line;
 746
 747         envp = udev_device_get_properties_envp(dev);
 748         if (util_run_program(udev, program, envp, result, sizeof(result), &reslen, NULL) != 0)
 749                 return -1;
 750
 751         line = result;
 752         while (line != NULL) {
 753                 char *pos;
 754
 755                 pos = strchr(line, '\n');
 756                 if (pos != NULL) {
 757                         pos[0] = '\0';
 758                         pos = &pos[1];
 759                 }
 760                 import_property_from_string(dev, line);
 761                 line = pos;
 762         }
 763         return 0;
 764 }
 765
 766 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
 767 {
 768         struct udev *udev = udev_device_get_udev(dev);
 769         struct udev_device *dev_parent;
 770         struct udev_list_entry *list_entry;
 771
 772         dev_parent = udev_device_get_parent(dev);
 773         if (dev_parent == NULL)
 774                 return -1;
 775
 776         dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
 777         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
 778                 const char *key = udev_list_entry_get_name(list_entry);
 779                 const char *val = udev_list_entry_get_value(list_entry);
 780
 781                 if (fnmatch(filter, key, 0) == 0) {
 782                         struct udev_list_entry *entry;
 783
 784                         dbg(udev, "import key '%s=%s'\n", key, val);
 785                         entry = udev_device_add_property(dev, key, val);
 786                         /* store in db, skip private keys */
 787                         if (key[0] != '.')
 788                                 udev_list_entry_set_flag(entry, 1);
 789                 }
 790         }
 791         return 0;
 792 }
 793
 794 #define WAIT_LOOP_PER_SECOND            50
 795 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
 796 {
 797         struct udev *udev = udev_device_get_udev(dev);
 798         char filepath[UTIL_PATH_SIZE];
 799         char devicepath[UTIL_PATH_SIZE];
 800         struct stat stats;
 801         int loop = timeout * WAIT_LOOP_PER_SECOND;
 802
 803         /* a relative path is a device attribute */
 804         devicepath[0] = '\0';
 805         if (file[0] != '/') {
 806                 util_strscpyl(devicepath, sizeof(devicepath),
 807                               udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL);
 808                 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
 809                 file = filepath;
 810         }
 811
 812         dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
 813         while (--loop) {
 814                 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
 815
 816                 /* lookup file */
 817                 if (stat(file, &stats) == 0) {
 818                         info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
 819                         return 0;
 820                 }
 821                 /* make sure, the device did not disappear in the meantime */
 822                 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
 823                         info(udev, "device disappeared while waiting for '%s'\n", file);
 824                         return -2;
 825                 }
 826                 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
 827                 nanosleep(&duration, NULL);
 828         }
 829         info(udev, "waiting for '%s' failed\n", file);
 830         return -1;
 831 }
 832
 833 static int attr_subst_subdir(char *attr, size_t len)
 834 {
 835         int found = 0;
 836
 837         if (strstr(attr, "/*/")) {
 838                 char *pos;
 839                 char dirname[UTIL_PATH_SIZE];
 840                 const char *tail;
 841                 DIR *dir;
 842
 843                 util_strscpy(dirname, sizeof(dirname), attr);
 844                 pos = strstr(dirname, "/*/");
 845                 if (pos == NULL)
 846                         return -1;
 847                 pos[0] = '\0';
 848                 tail = &pos[2];
 849                 dir = opendir(dirname);
 850                 if (dir != NULL) {
 851                         struct dirent *dent;
 852
 853                         for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 854                                 struct stat stats;
 855
 856                                 if (dent->d_name[0] == '.')
 857                                         continue;
 858                                 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
 859                                 if (stat(attr, &stats) == 0) {
 860                                         found = 1;
 861                                         break;
 862                                 }
 863                         }
 864                         closedir(dir);
 865                 }
 866         }
 867
 868         return found;
 869 }
 870
 871 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
 872 {
 873         char *linepos;
 874         char *temp;
 875
 876         linepos = *line;
 877         if (linepos == NULL || linepos[0] == '\0')
 878                 return -1;
 879
 880         /* skip whitespace */
 881         while (isspace(linepos[0]) || linepos[0] == ',')
 882                 linepos++;
 883
 884         /* get the key */
 885         if (linepos[0] == '\0')
 886                 return -1;
 887         *key = linepos;
 888
 889         while (1) {
 890                 linepos++;
 891                 if (linepos[0] == '\0')
 892                         return -1;
 893                 if (isspace(linepos[0]))
 894                         break;
 895                 if (linepos[0] == '=')
 896                         break;
 897                 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
 898                         if (linepos[1] == '=')
 899                                 break;
 900         }
 901
 902         /* remember end of key */
 903         temp = linepos;
 904
 905         /* skip whitespace after key */
 906         while (isspace(linepos[0]))
 907                 linepos++;
 908         if (linepos[0] == '\0')
 909                 return -1;
 910
 911         /* get operation type */
 912         if (linepos[0] == '=' && linepos[1] == '=') {
 913                 *op = OP_MATCH;
 914                 linepos += 2;
 915         } else if (linepos[0] == '!' && linepos[1] == '=') {
 916                 *op = OP_NOMATCH;
 917                 linepos += 2;
 918         } else if (linepos[0] == '+' && linepos[1] == '=') {
 919                 *op = OP_ADD;
 920                 linepos += 2;
 921         } else if (linepos[0] == '=') {
 922                 *op = OP_ASSIGN;
 923                 linepos++;
 924         } else if (linepos[0] == ':' && linepos[1] == '=') {
 925                 *op = OP_ASSIGN_FINAL;
 926                 linepos += 2;
 927         } else
 928                 return -1;
 929
 930         /* terminate key */
 931         temp[0] = '\0';
 932
 933         /* skip whitespace after operator */
 934         while (isspace(linepos[0]))
 935                 linepos++;
 936         if (linepos[0] == '\0')
 937                 return -1;
 938
 939         /* get the value */
 940         if (linepos[0] == '"')
 941                 linepos++;
 942         else
 943                 return -1;
 944         *value = linepos;
 945
 946         /* terminate */
 947         temp = strchr(linepos, '"');
 948         if (!temp)
 949                 return -1;
 950         temp[0] = '\0';
 951         temp++;
 952         dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
 953
 954         /* move line to next key */
 955         *line = temp;
 956         return 0;
 957 }
 958
 959 /* extract possible KEY{attr} */
 960 static char *get_key_attribute(struct udev *udev, char *str)
 961 {
 962         char *pos;
 963         char *attr;
 964
 965         attr = strchr(str, '{');
 966         if (attr != NULL) {
 967                 attr++;
 968                 pos = strchr(attr, '}');
 969                 if (pos == NULL) {
 970                         err(udev, "missing closing brace for format\n");
 971                         return NULL;
 972                 }
 973                 pos[0] = '\0';
 974                 dbg(udev, "attribute='%s'\n", attr);
 975                 return attr;
 976         }
 977         return NULL;
 978 }
 979
 980 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
 981                         enum operation_type op,
 982                         const char *value, const void *data)
 983 {
 984         struct token *token = &rule_tmp->token[rule_tmp->token_cur];
 985         const char *attr = NULL;
 986
 987         memset(token, 0x00, sizeof(struct token));
 988
 989         switch (type) {
 990         case TK_M_ACTION:
 991         case TK_M_DEVPATH:
 992         case TK_M_KERNEL:
 993         case TK_M_SUBSYSTEM:
 994         case TK_M_DRIVER:
 995         case TK_M_WAITFOR:
 996         case TK_M_DEVLINK:
 997         case TK_M_NAME:
 998         case TK_M_KERNELS:
 999         case TK_M_SUBSYSTEMS:
1000         case TK_M_DRIVERS:
1001         case TK_M_PROGRAM:
1002         case TK_M_IMPORT_FILE:
1003         case TK_M_IMPORT_PROG:
1004         case TK_M_IMPORT_PARENT:
1005         case TK_M_RESULT:
1006         case TK_A_OWNER:
1007         case TK_A_GROUP:
1008         case TK_A_MODE:
1009         case TK_A_NAME:
1010         case TK_A_GOTO:
1011                 token->key.value_off = add_string(rule_tmp->rules, value);
1012                 break;
1013         case TK_M_ENV:
1014         case TK_M_ATTR:
1015         case TK_M_ATTRS:
1016         case TK_A_ATTR:
1017         case TK_A_ENV:
1018                 attr = data;
1019                 token->key.value_off = add_string(rule_tmp->rules, value);
1020                 token->key.attr_off = add_string(rule_tmp->rules, attr);
1021                 break;
1022         case TK_A_DEVLINK:
1023                 token->key.value_off = add_string(rule_tmp->rules, value);
1024                 token->key.devlink_unique = *(int *)data;
1025                 break;
1026         case TK_M_TEST:
1027                 token->key.value_off = add_string(rule_tmp->rules, value);
1028                 if (data != NULL)
1029                         token->key.mode = *(mode_t *)data;
1030                 break;
1031         case TK_A_STRING_ESCAPE_NONE:
1032         case TK_A_STRING_ESCAPE_REPLACE:
1033         case TK_A_IGNORE_REMOVE:
1034                 break;
1035         case TK_A_RUN:
1036                 token->key.value_off = add_string(rule_tmp->rules, value);
1037                 token->key.fail_on_error = *(int *)data;
1038                 break;
1039         case TK_A_INOTIFY_WATCH:
1040         case TK_A_NUM_FAKE_PART:
1041         case TK_A_DEVLINK_PRIO:
1042                 token->key.devlink_prio = *(int *)data;
1043                 break;
1044         case TK_A_OWNER_ID:
1045                 token->key.uid = *(uid_t *)data;
1046                 break;
1047         case TK_A_GROUP_ID:
1048                 token->key.gid = *(gid_t *)data;
1049                 break;
1050         case TK_A_MODE_ID:
1051                 token->key.mode = *(mode_t *)data;
1052                 break;
1053         case TK_A_EVENT_TIMEOUT:
1054                 token->key.event_timeout = *(int *)data;
1055                 break;
1056         case TK_RULE:
1057         case TK_M_PARENTS_MIN:
1058         case TK_M_PARENTS_MAX:
1059         case TK_M_MAX:
1060         case TK_END:
1061         case TK_UNSET:
1062                 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1063                 return -1;
1064         }
1065
1066         if (value != NULL && type < TK_M_MAX) {
1067                 /* check if we need to split or call fnmatch() while matching rules */
1068                 enum string_glob_type glob;
1069                 int has_split;
1070                 int has_glob;
1071
1072                 has_split = (strchr(value, '|') != NULL);
1073                 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1074                 if (has_split && has_glob) {
1075                         glob = GL_SPLIT_GLOB;
1076                 } else if (has_split) {
1077                         glob = GL_SPLIT;
1078                 } else if (has_glob) {
1079                         if (strcmp(value, "?*") == 0)
1080                                 glob = GL_SOMETHING;
1081                         else
1082                                 glob = GL_GLOB;
1083                 } else {
1084                         glob = GL_PLAIN;
1085                 }
1086                 token->key.glob = glob;
1087         }
1088
1089         if (value != NULL && type > TK_M_MAX) {
1090                 /* check if assigned value has substitution chars */
1091                 if (value[0] == '[')
1092                         token->key.subst = SB_SUBSYS;
1093                 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1094                         token->key.subst = SB_FORMAT;
1095                 else
1096                         token->key.subst = SB_NONE;
1097         }
1098
1099         if (attr != NULL) {
1100                 /* check if property/attribut name has substitution chars */
1101                 if (attr[0] == '[')
1102                         token->key.attrsubst = SB_SUBSYS;
1103                 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1104                         token->key.attrsubst = SB_FORMAT;
1105                 else
1106                         token->key.attrsubst = SB_NONE;
1107         }
1108
1109         token->key.type = type;
1110         token->key.op = op;
1111         rule_tmp->token_cur++;
1112         if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1113                 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1114                 return -1;
1115         }
1116         return 0;
1117 }
1118
1119 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1120 {
1121         unsigned int i;
1122         unsigned int start = 0;
1123         unsigned int end = rule_tmp->token_cur;
1124
1125         for (i = 0; i < rule_tmp->token_cur; i++) {
1126                 enum token_type next_val = TK_UNSET;
1127                 unsigned int next_idx = 0;
1128                 unsigned int j;
1129
1130                 /* find smallest value */
1131                 for (j = start; j < end; j++) {
1132                         if (rule_tmp->token[j].type == TK_UNSET)
1133                                 continue;
1134                         if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1135                                 next_val = rule_tmp->token[j].type;
1136                                 next_idx = j;
1137                         }
1138                 }
1139
1140                 /* add token and mark done */
1141                 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1142                         return -1;
1143                 rule_tmp->token[next_idx].type = TK_UNSET;
1144
1145                 /* shrink range */
1146                 if (next_idx == start)
1147                         start++;
1148                 if (next_idx+1 == end)
1149                         end--;
1150         }
1151         return 0;
1152 }
1153
1154 static int add_rule(struct udev_rules *rules, char *line,
1155                     const char *filename, unsigned int filename_off, unsigned int lineno)
1156 {
1157         char *linepos;
1158         char *attr;
1159         struct rule_tmp rule_tmp;
1160         bool bus_warn = false;
1161         bool sysfs_warn = false;
1162         bool id_warn = false;
1163
1164         memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1165         rule_tmp.rules = rules;
1166         rule_tmp.rule.type = TK_RULE;
1167         rule_tmp.rule.rule.filename_off = filename_off;
1168         rule_tmp.rule.rule.filename_line = lineno;
1169
1170         linepos = line;
1171         while (1) {
1172                 char *key;
1173                 char *value;
1174                 enum operation_type op;
1175
1176                 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1177                         break;
1178
1179                 if (strcmp(key, "ACTION") == 0) {
1180                         if (op > OP_MATCH_MAX) {
1181                                 err(rules->udev, "invalid ACTION operation\n");
1182                                 goto invalid;
1183                         }
1184                         rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1185                         continue;
1186                 }
1187
1188                 if (strcmp(key, "DEVPATH") == 0) {
1189                         if (op > OP_MATCH_MAX) {
1190                                 err(rules->udev, "invalid DEVPATH operation\n");
1191                                 goto invalid;
1192                         }
1193                         rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1194                         continue;
1195                 }
1196
1197                 if (strcmp(key, "KERNEL") == 0) {
1198                         if (op > OP_MATCH_MAX) {
1199                                 err(rules->udev, "invalid KERNEL operation\n");
1200                                 goto invalid;
1201                         }
1202                         rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1203                         continue;
1204                 }
1205
1206                 if (strcmp(key, "SUBSYSTEM") == 0) {
1207                         if (op > OP_MATCH_MAX) {
1208                                 err(rules->udev, "invalid SUBSYSTEM operation\n");
1209                                 goto invalid;
1210                         }
1211                         /* bus, class, subsystem events should all be the same */
1212                         if (strcmp(value, "subsystem") == 0 ||
1213                             strcmp(value, "bus") == 0 ||
1214                             strcmp(value, "class") == 0) {
1215                                 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1216                                         err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1217                                             "please fix it in %s:%u", value, filename, lineno);
1218                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1219                         } else
1220                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1221                         continue;
1222                 }
1223
1224                 if (strcmp(key, "DRIVER") == 0) {
1225                         if (op > OP_MATCH_MAX) {
1226                                 err(rules->udev, "invalid DRIVER operation\n");
1227                                 goto invalid;
1228                         }
1229                         rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1230                         continue;
1231                 }
1232
1233                 if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1234                         attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1235                         if (attr == NULL) {
1236                                 err(rules->udev, "error parsing ATTR attribute\n");
1237                                 goto invalid;
1238                         }
1239                         if (op < OP_MATCH_MAX) {
1240                                 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1241                         } else {
1242                                 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1243                         }
1244                         continue;
1245                 }
1246
1247                 if (strcmp(key, "KERNELS") == 0) {
1248                         if (op > OP_MATCH_MAX) {
1249                                 err(rules->udev, "invalid KERNELS operation\n");
1250                                 goto invalid;
1251                         }
1252                         rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1253                         continue;
1254                 }
1255
1256                 if (strcmp(key, "ID") == 0) {
1257                         if (!id_warn) {
1258                                 id_warn = true;
1259                                 err(rules->udev, "ID= will be removed in a future udev version, "
1260                                     "please use KERNEL= to match the event device, or KERNELS= "
1261                                     "to match a parent device, in %s:%u\n", filename, lineno);
1262                         }
1263                         if (op > OP_MATCH_MAX) {
1264                                 err(rules->udev, "invalid KERNELS operation\n");
1265                                 goto invalid;
1266                         }
1267                         rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1268                         continue;
1269                 }
1270
1271                 if (strcmp(key, "SUBSYSTEMS") == 0) {
1272                         if (op > OP_MATCH_MAX) {
1273                                 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1274                                 goto invalid;
1275                         }
1276                         rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1277                         continue;
1278                 }
1279
1280                 if (strcmp(key, "BUS") == 0) {
1281                         if (!bus_warn) {
1282                                 bus_warn = true;
1283                                 err(rules->udev, "BUS= will be removed in a future udev version, "
1284                                     "please use SUBSYSTEM= to match the event device, or SUBSYSTEMS= "
1285                                     "to match a parent device, in %s:%u\n", filename, lineno);
1286                         }
1287                         if (op > OP_MATCH_MAX) {
1288                                 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1289                                 goto invalid;
1290                         }
1291                         rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1292                         continue;
1293                 }
1294
1295                 if (strcmp(key, "DRIVERS") == 0) {
1296                         if (op > OP_MATCH_MAX) {
1297                                 err(rules->udev, "invalid DRIVERS operation\n");
1298                                 goto invalid;
1299                         }
1300                         rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1301                         continue;
1302                 }
1303
1304                 if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0) {
1305                         if (op > OP_MATCH_MAX) {
1306                                 err(rules->udev, "invalid ATTRS operation\n");
1307                                 goto invalid;
1308                         }
1309                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1310                         if (attr == NULL) {
1311                                 err(rules->udev, "error parsing ATTRS attribute\n");
1312                                 goto invalid;
1313                         }
1314                         if (strncmp(attr, "device/", 7) == 0)
1315                                 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1316                                     "please fix it in %s:%u", filename, lineno);
1317                         else if (strstr(attr, "../") != NULL)
1318                                 err(rules->udev, "do not reference parent sysfs directories directly, "
1319                                     "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1320                         rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1321                         continue;
1322                 }
1323
1324                 if (strncmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1325                         if (!sysfs_warn) {
1326                                 sysfs_warn = true;
1327                                 err(rules->udev, "SYSFS{}= will be removed in a future udev version, "
1328                                     "please use ATTR{}= to match the event device, or ATTRS{}= "
1329                                     "to match a parent device, in %s:%u\n", filename, lineno);
1330                         }
1331                         if (op > OP_MATCH_MAX) {
1332                                 err(rules->udev, "invalid ATTRS operation\n");
1333                                 goto invalid;
1334                         }
1335                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1336                         if (attr == NULL) {
1337                                 err(rules->udev, "error parsing ATTRS attribute\n");
1338                                 goto invalid;
1339                         }
1340                         rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1341                         continue;
1342                 }
1343
1344                 if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1345                         attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1346                         if (attr == NULL) {
1347                                 err(rules->udev, "error parsing ENV attribute\n");
1348                                 goto invalid;
1349                         }
1350                         if (op < OP_MATCH_MAX) {
1351                                 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1352                                         goto invalid;
1353                         } else {
1354                                 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1355                                         goto invalid;
1356                         }
1357                         continue;
1358                 }
1359
1360                 if (strcmp(key, "PROGRAM") == 0) {
1361                         rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1362                         continue;
1363                 }
1364
1365                 if (strcmp(key, "RESULT") == 0) {
1366                         if (op > OP_MATCH_MAX) {
1367                                 err(rules->udev, "invalid RESULT operation\n");
1368                                 goto invalid;
1369                         }
1370                         rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1371                         continue;
1372                 }
1373
1374                 if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1375                         attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1376                         if (attr != NULL && strstr(attr, "program")) {
1377                                 dbg(rules->udev, "IMPORT will be executed\n");
1378                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1379                         } else if (attr != NULL && strstr(attr, "file")) {
1380                                 dbg(rules->udev, "IMPORT will be included as file\n");
1381                                 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1382                         } else if (attr != NULL && strstr(attr, "parent")) {
1383                                 dbg(rules->udev, "IMPORT will include the parent values\n");
1384                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1385                         } else {
1386                                 /* figure it out if it is executable */
1387                                 char file[UTIL_PATH_SIZE];
1388                                 char *pos;
1389                                 struct stat statbuf;
1390
1391                                 /* allow programs in /lib/udev called without the path */
1392                                 if (value[0] != '/')
1393                                         util_strscpyl(file, sizeof(file), LIBEXECDIR "/", value, NULL);
1394                                 else
1395                                         util_strscpy(file, sizeof(file), value);
1396                                 pos = strchr(file, ' ');
1397                                 if (pos)
1398                                         pos[0] = '\0';
1399                                 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1400                                 if (stat(file, &statbuf) == 0 && (statbuf.st_mode & S_IXUSR)) {
1401                                         dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1402                                         rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1403                                 } else {
1404                                         dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1405                                         rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1406                                 }
1407                         }
1408                         continue;
1409                 }
1410
1411                 if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) {
1412                         mode_t mode = 0;
1413
1414                         if (op > OP_MATCH_MAX) {
1415                                 err(rules->udev, "invalid TEST operation\n");
1416                                 goto invalid;
1417                         }
1418                         attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1419                         if (attr != NULL) {
1420                                 mode = strtol(attr, NULL, 8);
1421                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1422                         } else {
1423                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1424                         }
1425                         continue;
1426                 }
1427
1428                 if (strncmp(key, "RUN", sizeof("RUN")-1) == 0) {
1429                         int flag = 0;
1430
1431                         attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1432                         if (attr != NULL && strstr(attr, "fail_event_on_error"))
1433                                 flag = 1;
1434                         rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1435                         continue;
1436                 }
1437
1438                 if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) {
1439                         rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1440                         continue;
1441                 }
1442
1443                 if (strcmp(key, "LABEL") == 0) {
1444                         rule_tmp.rule.rule.label_off = add_string(rules, value);
1445                         continue;
1446                 }
1447
1448                 if (strcmp(key, "GOTO") == 0) {
1449                         rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1450                         continue;
1451                 }
1452
1453                 if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) {
1454                         if (op < OP_MATCH_MAX) {
1455                                 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1456                         } else {
1457                                 if (value[0] == '\0')
1458                                         info(rules->udev, "name empty, node creation suppressed\n");
1459                                 else if (strcmp(value, "%k") == 0)
1460                                         err(rules->udev, "NAME=\"%%k\" is superfluous and breaks "
1461                                             "kernel supplied names, please remove it from %s:%u\n", filename, lineno);
1462                                 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1463                                 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1464                                 if (attr != NULL) {
1465                                         if (strstr(attr, "all_partitions") != NULL) {
1466                                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1467
1468                                                 dbg(rules->udev, "creation of partition nodes requested\n");
1469                                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1470                                         }
1471                                         if (strstr(attr, "ignore_remove") != NULL) {
1472                                                 dbg(rules->udev, "remove event should be ignored\n");
1473                                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1474                                         }
1475                                 }
1476                         }
1477                         rule_tmp.rule.rule.flags = 1;
1478                         continue;
1479                 }
1480
1481                 if (strncmp(key, "SYMLINK", sizeof("SYMLINK")-1) == 0) {
1482                         if (op < OP_MATCH_MAX) {
1483                                 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1484                         } else {
1485                                 int flag = 0;
1486
1487                                 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1488                                 if (attr != NULL && strstr(attr, "unique") != NULL)
1489                                         flag = 1;
1490                                 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1491                         }
1492                         rule_tmp.rule.rule.flags = 1;
1493                         continue;
1494                 }
1495
1496                 if (strcmp(key, "OWNER") == 0) {
1497                         uid_t uid;
1498                         char *endptr;
1499
1500                         uid = strtoul(value, &endptr, 10);
1501                         if (endptr[0] == '\0') {
1502                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1503                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1504                                 uid = add_uid(rules, value);
1505                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1506                         } else if (rules->resolve_names >= 0) {
1507                                 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1508                         }
1509                         rule_tmp.rule.rule.flags = 1;
1510                         continue;
1511                 }
1512
1513                 if (strcmp(key, "GROUP") == 0) {
1514                         gid_t gid;
1515                         char *endptr;
1516
1517                         gid = strtoul(value, &endptr, 10);
1518                         if (endptr[0] == '\0') {
1519                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1520                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1521                                 gid = add_gid(rules, value);
1522                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1523                         } else if (rules->resolve_names >= 0) {
1524                                 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1525                         }
1526                         rule_tmp.rule.rule.flags = 1;
1527                         continue;
1528                 }
1529
1530                 if (strcmp(key, "MODE") == 0) {
1531                         mode_t mode;
1532                         char *endptr;
1533
1534                         mode = strtol(value, &endptr, 8);
1535                         if (endptr[0] == '\0')
1536                                 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1537                         else
1538                                 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1539                         rule_tmp.rule.rule.flags = 1;
1540                         continue;
1541                 }
1542
1543                 if (strcmp(key, "OPTIONS") == 0) {
1544                         const char *pos;
1545
1546                         if (strstr(value, "ignore_remove") != NULL) {
1547                                 dbg(rules->udev, "remove event should be ignored\n");
1548                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1549                         }
1550                         pos = strstr(value, "link_priority=");
1551                         if (pos != NULL) {
1552                                 int prio = atoi(&pos[strlen("link_priority=")]);
1553
1554                                 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1555                                 dbg(rules->udev, "link priority=%i\n", prio);
1556                         }
1557                         pos = strstr(value, "event_timeout=");
1558                         if (pos != NULL) {
1559                                 int tout = atoi(&pos[strlen("event_timeout=")]);
1560
1561                                 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1562                                 dbg(rules->udev, "event timeout=%i\n", tout);
1563                         }
1564                         pos = strstr(value, "string_escape=");
1565                         if (pos != NULL) {
1566                                 pos = &pos[strlen("string_escape=")];
1567                                 if (strncmp(pos, "none", strlen("none")) == 0)
1568                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1569                                 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1570                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1571                         }
1572                         if (strstr(value, "all_partitions") != NULL) {
1573                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1574
1575                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1576                                 dbg(rules->udev, "creation of partition nodes requested\n");
1577                         }
1578                         pos = strstr(value, "nowatch");
1579                         if (pos != NULL) {
1580                                 const int off = 0;
1581
1582                                 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &off);
1583                                 dbg(rules->udev, "inotify watch of device disabled\n");
1584                         } else {
1585                                 pos = strstr(value, "watch");
1586                                 if (pos != NULL) {
1587                                         const int on = 1;
1588
1589                                         rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &on);
1590                                         dbg(rules->udev, "inotify watch of device requested\n");
1591                                 }
1592                         }
1593                         continue;
1594                 }
1595                 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1596         }
1597
1598         /* add rule token */
1599         rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1600         if (add_token(rules, &rule_tmp.rule) != 0)
1601                 goto invalid;
1602
1603         /* add tokens to list, sorted by type */
1604         if (sort_token(rules, &rule_tmp) != 0)
1605                 goto invalid;
1606
1607         return 0;
1608 invalid:
1609         err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1610         return -1;
1611 }
1612
1613 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1614 {
1615         FILE *f;
1616         unsigned int first_token;
1617         char line[UTIL_LINE_SIZE];
1618         int line_nr = 0;
1619         unsigned int i;
1620
1621         info(rules->udev, "reading '%s' as rules file\n", filename);
1622
1623         f = fopen(filename, "r");
1624         if (f == NULL)
1625                 return -1;
1626
1627         first_token = rules->token_cur;
1628
1629         while (fgets(line, sizeof(line), f) != NULL) {
1630                 char *key;
1631                 size_t len;
1632
1633                 /* skip whitespace */
1634                 line_nr++;
1635                 key = line;
1636                 while (isspace(key[0]))
1637                         key++;
1638
1639                 /* comment */
1640                 if (key[0] == '#')
1641                         continue;
1642
1643                 len = strlen(line);
1644                 if (len < 3)
1645                         continue;
1646
1647                 /* continue reading if backslash+newline is found */
1648                 while (line[len-2] == '\\') {
1649                         if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1650                                 break;
1651                         if (strlen(&line[len-2]) < 2)
1652                                 break;
1653                         line_nr++;
1654                         len = strlen(line);
1655                 }
1656
1657                 if (len+1 >= sizeof(line)) {
1658                         err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1659                         continue;
1660                 }
1661                 add_rule(rules, key, filename, filename_off, line_nr);
1662         }
1663         fclose(f);
1664
1665         /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1666         for (i = first_token+1; i < rules->token_cur; i++) {
1667                 if (rules->tokens[i].type == TK_A_GOTO) {
1668                         char *label = &rules->buf[rules->tokens[i].key.value_off];
1669                         unsigned int j;
1670
1671                         for (j = i+1; j < rules->token_cur; j++) {
1672                                 if (rules->tokens[j].type != TK_RULE)
1673                                         continue;
1674                                 if (rules->tokens[j].rule.label_off == 0)
1675                                         continue;
1676                                 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1677                                         continue;
1678                                 rules->tokens[i].key.rule_goto = j;
1679                                 break;
1680                         }
1681                         if (rules->tokens[i].key.rule_goto == 0)
1682                                 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1683                 }
1684         }
1685         return 0;
1686 }
1687
1688 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1689 {
1690         DIR *dir;
1691         char filename[UTIL_PATH_SIZE];
1692
1693         dbg(udev, "open directory '%s'\n", dirname);
1694         dir = opendir(dirname);
1695         if (dir == NULL) {
1696                 info(udev, "unable to open '%s': %m\n", dirname);
1697                 return -1;
1698         }
1699
1700         while (1) {
1701                 struct dirent *dent;
1702
1703                 dent = readdir(dir);
1704                 if (dent == NULL || dent->d_name[0] == '\0')
1705                         break;
1706
1707                 if (dent->d_name[0] == '.')
1708                         continue;
1709
1710                 /* look for file matching with specified suffix */
1711                 if (suffix != NULL) {
1712                         const char *ext;
1713
1714                         ext = strrchr(dent->d_name, '.');
1715                         if (ext == NULL)
1716                                 continue;
1717                         if (strcmp(ext, suffix) != 0)
1718                                 continue;
1719                 }
1720                 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1721                 dbg(udev, "put file '%s' into list\n", filename);
1722                 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1723         }
1724
1725         closedir(dir);
1726         return 0;
1727 }
1728
1729 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1730 {
1731         struct udev_rules *rules;
1732         struct stat statbuf;
1733         struct udev_list_node file_list;
1734         struct udev_list_entry *file_loop, *file_tmp;
1735         struct token end_token;
1736
1737         rules = malloc(sizeof(struct udev_rules));
1738         if (rules == NULL)
1739                 return NULL;
1740         memset(rules, 0x00, sizeof(struct udev_rules));
1741         rules->udev = udev;
1742         rules->resolve_names = resolve_names;
1743         udev_list_init(&file_list);
1744
1745         /* init token array and string buffer */
1746         rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1747         if (rules->tokens == NULL)
1748                 return NULL;
1749         rules->token_max = PREALLOC_TOKEN;
1750
1751         rules->buf = malloc(PREALLOC_STRBUF);
1752         if (rules->buf == NULL)
1753                 return NULL;
1754         rules->buf_max = PREALLOC_STRBUF;
1755         /* offset 0 is always '\0' */
1756         rules->buf[0] = '\0';
1757         rules->buf_cur = 1;
1758         dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1759             rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1760
1761         rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1762         if (rules->trie_nodes == NULL)
1763                 return NULL;
1764         rules->trie_nodes_max = PREALLOC_TRIE;
1765         /* offset 0 is the trie root, with an empty string */
1766         memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1767         rules->trie_nodes_cur = 1;
1768
1769         if (udev_get_rules_path(udev) != NULL) {
1770                 /* custom rules location for testing */
1771                 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1772         } else {
1773                 char filename[PATH_MAX];
1774                 struct udev_list_node sort_list;
1775                 struct udev_list_entry *sort_loop, *sort_tmp;
1776
1777                 /* read user/custom rules */
1778                 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1779
1780                 /* read dynamic/temporary rules */
1781                 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
1782                 udev_list_init(&sort_list);
1783                 add_matching_files(udev, &sort_list, filename, ".rules");
1784
1785                 /* read default rules */
1786                 add_matching_files(udev, &sort_list, LIBEXECDIR "/rules.d", ".rules");
1787
1788                 /* sort all rules files by basename into list of files */
1789                 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1790                         const char *sort_name = udev_list_entry_get_name(sort_loop);
1791                         const char *sort_base = strrchr(sort_name, '/');
1792
1793                         if (sort_base == NULL)
1794                                 continue;
1795                         /* sort entry into existing list */
1796                         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1797                                 const char *file_name = udev_list_entry_get_name(file_loop);
1798                                 const char *file_base = strrchr(file_name, '/');
1799
1800                                 if (file_base == NULL)
1801                                         continue;
1802                                 if (strcmp(file_base, sort_base) == 0) {
1803                                         info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1804                                              file_name, sort_name);
1805                                         udev_list_entry_delete(sort_loop);
1806                                         sort_loop = NULL;
1807                                         break;
1808                                 }
1809                                 if (strcmp(file_base, sort_base) > 0) {
1810                                         /* found later file, insert before */
1811                                         udev_list_entry_remove(sort_loop);
1812                                         udev_list_entry_insert_before(sort_loop, file_loop);
1813                                         sort_loop = NULL;
1814                                         break;
1815                                 }
1816                         }
1817                         /* current file already handled */
1818                         if (sort_loop == NULL)
1819                                 continue;
1820                         /* no later file, append to end of list */
1821                         udev_list_entry_remove(sort_loop);
1822                         udev_list_entry_append(sort_loop, &file_list);
1823                 }
1824         }
1825
1826         /* add all filenames to the string buffer */
1827         udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1828                 const char *filename = udev_list_entry_get_name(file_loop);
1829                 unsigned int filename_off;
1830
1831                 filename_off = add_string(rules, filename);
1832                 /* the offset in the rule is limited to unsigned short */
1833                 if (filename_off < USHRT_MAX)
1834                         udev_list_entry_set_flag(file_loop, filename_off);
1835         }
1836
1837         /* parse list of files */
1838         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1839                 const char *filename = udev_list_entry_get_name(file_loop);
1840                 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1841
1842                 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1843                         parse_file(rules, filename, filename_off);
1844                 else
1845                         err(udev, "can not read '%s'\n", filename);
1846                 udev_list_entry_delete(file_loop);
1847         }
1848
1849         memset(&end_token, 0x00, sizeof(struct token));
1850         end_token.type = TK_END;
1851         add_token(rules, &end_token);
1852
1853         /* shrink allocated token and string buffer */
1854         if (rules->token_cur < rules->token_max) {
1855                 struct token *tokens;
1856
1857                 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1858                 if (tokens != NULL || rules->token_cur == 0) {
1859                         rules->tokens = tokens;
1860                         rules->token_max = rules->token_cur;
1861                 }
1862         }
1863         if (rules->buf_cur < rules->buf_max) {
1864                 char *buf;
1865
1866                 buf = realloc(rules->buf, rules->buf_cur);
1867                 if (buf != NULL || rules->buf_cur == 0) {
1868                         rules->buf = buf;
1869                         rules->buf_max = rules->buf_cur;
1870                 }
1871         }
1872         info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1873              rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1874         info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1875              rules->trie_nodes_cur * sizeof(struct trie_node),
1876              rules->trie_nodes_cur, sizeof(struct trie_node));
1877
1878         /* cleanup trie */
1879         free(rules->trie_nodes);
1880         rules->trie_nodes = NULL;
1881         rules->trie_nodes_cur = 0;
1882         rules->trie_nodes_max = 0;
1883
1884         /* cleanup uid/gid cache */
1885         free(rules->uids);
1886         rules->uids = NULL;
1887         rules->uids_cur = 0;
1888         rules->uids_max = 0;
1889         free(rules->gids);
1890         rules->gids = NULL;
1891         rules->gids_cur = 0;
1892         rules->gids_max = 0;
1893
1894         dump_rules(rules);
1895         return rules;
1896 }
1897
1898 void udev_rules_unref(struct udev_rules *rules)
1899 {
1900         if (rules == NULL)
1901                 return;
1902         free(rules->tokens);
1903         free(rules->buf);
1904         free(rules->trie_nodes);
1905         free(rules->uids);
1906         free(rules->gids);
1907         free(rules);
1908 }
1909
1910 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1911 {
1912         char *key_value = &rules->buf[token->key.value_off];
1913         char *pos;
1914         int match = 0;
1915
1916         if (val == NULL)
1917                 val = "";
1918
1919         switch (token->key.glob) {
1920         case GL_PLAIN:
1921                 match = (strcmp(key_value, val) == 0);
1922                 break;
1923         case GL_GLOB:
1924                 match = (fnmatch(key_value, val, 0) == 0);
1925                 break;
1926         case GL_SPLIT:
1927                 {
1928                         const char *split;
1929                         size_t len;
1930
1931                         split = &rules->buf[token->key.value_off];
1932                         len = strlen(val);
1933                         while (1) {
1934                                 const char *next;
1935
1936                                 next = strchr(split, '|');
1937                                 if (next != NULL) {
1938                                         size_t matchlen = (size_t)(next - split);
1939
1940                                         match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1941                                         if (match)
1942                                                 break;
1943                                 } else {
1944                                         match = (strcmp(split, val) == 0);
1945                                         break;
1946                                 }
1947                                 split = &next[1];
1948                         }
1949                         break;
1950                 }
1951         case GL_SPLIT_GLOB:
1952                 {
1953                         char value[UTIL_PATH_SIZE];
1954
1955                         util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1956                         key_value = value;
1957                         while (key_value != NULL) {
1958                                 pos = strchr(key_value, '|');
1959                                 if (pos != NULL) {
1960                                         pos[0] = '\0';
1961                                         pos = &pos[1];
1962                                 }
1963                                 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1964                                 match = (fnmatch(key_value, val, 0) == 0);
1965                                 if (match)
1966                                         break;
1967                                 key_value = pos;
1968                         }
1969                         break;
1970                 }
1971         case GL_SOMETHING:
1972                 match = (val[0] != '\0');
1973                 break;
1974         case GL_UNSET:
1975                 return -1;
1976         }
1977
1978         if (match && (token->key.op == OP_MATCH)) {
1979                 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1980                 return 0;
1981         }
1982         if (!match && (token->key.op == OP_NOMATCH)) {
1983                 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1984                 return 0;
1985         }
1986         dbg(rules->udev, "%s is not true\n", token_str(token->type));
1987         return -1;
1988 }
1989
1990 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1991 {
1992         const char *name;
1993         char nbuf[UTIL_NAME_SIZE];
1994         const char *value;
1995         char vbuf[UTIL_NAME_SIZE];
1996         size_t len;
1997
1998         name = &rules->buf[cur->key.attr_off];
1999         switch (cur->key.attrsubst) {
2000         case SB_FORMAT:
2001                 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
2002                 name = nbuf;
2003                 /* fall through */
2004         case SB_NONE:
2005                 value = udev_device_get_sysattr_value(dev, name);
2006                 if (value == NULL)
2007                         return -1;
2008                 break;
2009         case SB_SUBSYS:
2010                 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
2011                         return -1;
2012                 value = vbuf;
2013                 break;
2014         default:
2015                 return -1;
2016         }
2017
2018         /* remove trailing whitespace, if not asked to match for it */
2019         len = strlen(value);
2020         if (len > 0 && isspace(value[len-1])) {
2021                 const char *key_value;
2022                 size_t klen;
2023
2024                 key_value = &rules->buf[cur->key.value_off];
2025                 klen = strlen(key_value);
2026                 if (klen > 0 && !isspace(key_value[klen-1])) {
2027                         if (value != vbuf) {
2028                                 util_strscpy(vbuf, sizeof(vbuf), value);
2029                                 value = vbuf;
2030                         }
2031                         while (len > 0 && isspace(vbuf[--len]))
2032                                 vbuf[len] = '\0';
2033                         dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
2034                 }
2035         }
2036
2037         return match_key(rules, cur, value);
2038 }
2039
2040 enum escape_type {
2041         ESCAPE_UNSET,
2042         ESCAPE_NONE,
2043         ESCAPE_REPLACE,
2044 };
2045
2046 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
2047 {
2048         struct token *cur;
2049         struct token *rule;
2050         enum escape_type esc = ESCAPE_UNSET;
2051         int can_set_name;
2052
2053         if (rules->tokens == NULL)
2054                 return -1;
2055
2056         can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
2057                          strcmp(udev_device_get_action(event->dev), "change") == 0) &&
2058                         (major(udev_device_get_devnum(event->dev)) > 0 ||
2059                          strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
2060
2061         /* loop through token list, match, run actions or forward to next rule */
2062         cur = &rules->tokens[0];
2063         rule = cur;
2064         while (1) {
2065                 dump_token(rules, cur);
2066                 switch (cur->type) {
2067                 case TK_RULE:
2068                         /* current rule */
2069                         rule = cur;
2070                         /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2071                         if (!can_set_name && rule->rule.flags)
2072                                 goto nomatch;
2073                         esc = ESCAPE_UNSET;
2074                         break;
2075                 case TK_M_ACTION:
2076                         if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2077                                 goto nomatch;
2078                         break;
2079                 case TK_M_DEVPATH:
2080                         if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2081                                 goto nomatch;
2082                         break;
2083                 case TK_M_KERNEL:
2084                         if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2085                                 goto nomatch;
2086                         break;
2087                 case TK_M_DEVLINK:
2088                         {
2089                                 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2090                                 struct udev_list_entry *list_entry;
2091                                 int match = 0;
2092
2093                                 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2094                                         const char *devlink;
2095
2096                                         devlink =  &udev_list_entry_get_name(list_entry)[devlen];
2097                                         if (match_key(rules, cur, devlink) == 0) {
2098                                                 match = 1;
2099                                                 break;
2100                                         }
2101                                 }
2102                                 if (!match)
2103                                         goto nomatch;
2104                                 break;
2105                         }
2106                 case TK_M_NAME:
2107                         if (match_key(rules, cur, event->name) != 0)
2108                                 goto nomatch;
2109                         break;
2110                 case TK_M_ENV:
2111                         {
2112                                 const char *key_name = &rules->buf[cur->key.attr_off];
2113                                 const char *value;
2114
2115                                 value = udev_device_get_property_value(event->dev, key_name);
2116                                 if (value == NULL) {
2117                                         dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2118                                         value = "";
2119                                 }
2120                                 if (match_key(rules, cur, value))
2121                                         goto nomatch;
2122                                 break;
2123                         }
2124                 case TK_M_SUBSYSTEM:
2125                         if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2126                                 goto nomatch;
2127                         break;
2128                 case TK_M_DRIVER:
2129                         if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2130                                 goto nomatch;
2131                         break;
2132                 case TK_M_WAITFOR:
2133                         {
2134                                 char filename[UTIL_PATH_SIZE];
2135                                 int found;
2136
2137                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2138                                 found = (wait_for_file(event->dev, filename, 10) == 0);
2139                                 if (!found && (cur->key.op != OP_NOMATCH))
2140                                         goto nomatch;
2141                                 break;
2142                         }
2143                 case TK_M_ATTR:
2144                         if (match_attr(rules, event->dev, event, cur) != 0)
2145                                 goto nomatch;
2146                         break;
2147                 case TK_M_KERNELS:
2148                 case TK_M_SUBSYSTEMS:
2149                 case TK_M_DRIVERS:
2150                 case TK_M_ATTRS:
2151                         {
2152                                 struct token *next;
2153
2154                                 /* get whole sequence of parent matches */
2155                                 next = cur;
2156                                 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2157                                         next++;
2158
2159                                 /* loop over parents */
2160                                 event->dev_parent = event->dev;
2161                                 while (1) {
2162                                         struct token *key;
2163
2164                                         dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2165                                         /* loop over sequence of parent match keys */
2166                                         for (key = cur; key < next; key++ ) {
2167                                                 dump_token(rules, key);
2168                                                 switch(key->type) {
2169                                                 case TK_M_KERNELS:
2170                                                         if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2171                                                                 goto try_parent;
2172                                                         break;
2173                                                 case TK_M_SUBSYSTEMS:
2174                                                         if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2175                                                                 goto try_parent;
2176                                                         break;
2177                                                 case TK_M_DRIVERS:
2178                                                         if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2179                                                                 goto try_parent;
2180                                                         break;
2181                                                 case TK_M_ATTRS:
2182                                                         if (match_attr(rules, event->dev_parent, event, key) != 0)
2183                                                                 goto try_parent;
2184                                                         break;
2185                                                 default:
2186                                                         goto nomatch;
2187                                                 }
2188                                                 dbg(event->udev, "parent key matched\n");
2189                                         }
2190                                         dbg(event->udev, "all parent keys matched\n");
2191                                         /* all keys matched */
2192                                         break;
2193
2194                                 try_parent:
2195                                         event->dev_parent = udev_device_get_parent(event->dev_parent);
2196                                         if (event->dev_parent == NULL)
2197                                                 goto nomatch;
2198                                 }
2199                                 /* move behind our sequence of parent match keys */
2200                                 cur = next;
2201                                 continue;
2202                         }
2203                 case TK_M_TEST:
2204                         {
2205                                 char filename[UTIL_PATH_SIZE];
2206                                 struct stat statbuf;
2207                                 int match;
2208
2209                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2210                                 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2211                                         if (filename[0] != '/') {
2212                                                 char tmp[UTIL_PATH_SIZE];
2213
2214                                                 util_strscpy(tmp, sizeof(tmp), filename);
2215                                                 util_strscpyl(filename, sizeof(filename),
2216                                                               udev_device_get_syspath(event->dev), "/", tmp, NULL);
2217                                         }
2218                                 }
2219                                 attr_subst_subdir(filename, sizeof(filename));
2220
2221                                 match = (stat(filename, &statbuf) == 0);
2222                                 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2223                                 if (match && cur->key.mode > 0) {
2224                                         match = ((statbuf.st_mode & cur->key.mode) > 0);
2225                                         dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2226                                             match ? "matches" : "does not match", cur->key.mode);
2227                                 }
2228                                 if (match && cur->key.op == OP_NOMATCH)
2229                                         goto nomatch;
2230                                 if (!match && cur->key.op == OP_MATCH)
2231                                         goto nomatch;
2232                                 break;
2233                         }
2234                 case TK_M_PROGRAM:
2235                         {
2236                                 char program[UTIL_PATH_SIZE];
2237                                 char **envp;
2238                                 char result[UTIL_PATH_SIZE];
2239
2240                                 free(event->program_result);
2241                                 event->program_result = NULL;
2242                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2243                                 envp = udev_device_get_properties_envp(event->dev);
2244                                 info(event->udev, "PROGRAM '%s' %s:%u\n",
2245                                      program,
2246                                      &rules->buf[rule->rule.filename_off],
2247                                      rule->rule.filename_line);
2248                                 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL, NULL) != 0) {
2249                                         if (cur->key.op != OP_NOMATCH)
2250                                                 goto nomatch;
2251                                 } else {
2252                                         int count;
2253
2254                                         util_remove_trailing_chars(result, '\n');
2255                                         if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2256                                                 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2257                                                 if (count > 0)
2258                                                         info(event->udev, "%i character(s) replaced\n" , count);
2259                                         }
2260                                         event->program_result = strdup(result);
2261                                         dbg(event->udev, "storing result '%s'\n", event->program_result);
2262                                         if (cur->key.op == OP_NOMATCH)
2263                                                 goto nomatch;
2264                                 }
2265                                 break;
2266                         }
2267                 case TK_M_IMPORT_FILE:
2268                         {
2269                                 char import[UTIL_PATH_SIZE];
2270
2271                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2272                                 if (import_file_into_properties(event->dev, import) != 0)
2273                                         if (cur->key.op != OP_NOMATCH)
2274                                                 goto nomatch;
2275                                 break;
2276                         }
2277                 case TK_M_IMPORT_PROG:
2278                         {
2279                                 char import[UTIL_PATH_SIZE];
2280
2281                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2282                                 info(event->udev, "IMPORT '%s' %s:%u\n",
2283                                      import,
2284                                      &rules->buf[rule->rule.filename_off],
2285                                      rule->rule.filename_line);
2286                                 if (import_program_into_properties(event->dev, import) != 0)
2287                                         if (cur->key.op != OP_NOMATCH)
2288                                                 goto nomatch;
2289                                 break;
2290                         }
2291                 case TK_M_IMPORT_PARENT:
2292                         {
2293                                 char import[UTIL_PATH_SIZE];
2294
2295                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2296                                 if (import_parent_into_properties(event->dev, import) != 0)
2297                                         if (cur->key.op != OP_NOMATCH)
2298                                                 goto nomatch;
2299                                 break;
2300                         }
2301                 case TK_M_RESULT:
2302                         if (match_key(rules, cur, event->program_result) != 0)
2303                                 goto nomatch;
2304                         break;
2305                 case TK_A_STRING_ESCAPE_NONE:
2306                         esc = ESCAPE_NONE;
2307                         break;
2308                 case TK_A_STRING_ESCAPE_REPLACE:
2309                         esc = ESCAPE_REPLACE;
2310                         break;
2311                 case TK_A_NUM_FAKE_PART:
2312                         if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2313                                 break;
2314                         if (udev_device_get_sysnum(event->dev) != NULL)
2315                                 break;
2316                         udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2317                         break;
2318                 case TK_A_INOTIFY_WATCH:
2319                         event->inotify_watch = cur->key.watch;
2320                         break;
2321                 case TK_A_DEVLINK_PRIO:
2322                         udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2323                         break;
2324                 case TK_A_OWNER:
2325                         {
2326                                 char owner[UTIL_NAME_SIZE];
2327
2328                                 if (event->owner_final)
2329                                         break;
2330                                 if (cur->key.op == OP_ASSIGN_FINAL)
2331                                         event->owner_final = 1;
2332                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2333                                 event->uid = util_lookup_user(event->udev, owner);
2334                                 info(event->udev, "OWNER %u %s:%u\n",
2335                                      event->uid,
2336                                      &rules->buf[rule->rule.filename_off],
2337                                      rule->rule.filename_line);
2338                                 break;
2339                         }
2340                 case TK_A_GROUP:
2341                         {
2342                                 char group[UTIL_NAME_SIZE];
2343
2344                                 if (event->group_final)
2345                                         break;
2346                                 if (cur->key.op == OP_ASSIGN_FINAL)
2347                                         event->group_final = 1;
2348                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2349                                 event->gid = util_lookup_group(event->udev, group);
2350                                 info(event->udev, "GROUP %u %s:%u\n",
2351                                      event->gid,
2352                                      &rules->buf[rule->rule.filename_off],
2353                                      rule->rule.filename_line);
2354                                 break;
2355                         }
2356                 case TK_A_MODE:
2357                         {
2358                                 char mode[UTIL_NAME_SIZE];
2359                                 char *endptr;
2360
2361                                 if (event->mode_final)
2362                                         break;
2363                                 if (cur->key.op == OP_ASSIGN_FINAL)
2364                                         event->mode_final = 1;
2365                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode, sizeof(mode));
2366                                 event->mode = strtol(mode, &endptr, 8);
2367                                 if (endptr[0] != '\0') {
2368                                         err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2369                                         event->mode = 0660;
2370                                 }
2371                                 info(event->udev, "MODE %#o %s:%u\n",
2372                                      event->mode,
2373                                      &rules->buf[rule->rule.filename_off],
2374                                      rule->rule.filename_line);
2375                                 break;
2376                         }
2377                 case TK_A_OWNER_ID:
2378                         if (event->owner_final)
2379                                 break;
2380                         if (cur->key.op == OP_ASSIGN_FINAL)
2381                                 event->owner_final = 1;
2382                         event->uid = cur->key.uid;
2383                         info(event->udev, "OWNER %u %s:%u\n",
2384                              event->uid,
2385                              &rules->buf[rule->rule.filename_off],
2386                              rule->rule.filename_line);
2387                         break;
2388                 case TK_A_GROUP_ID:
2389                         if (event->group_final)
2390                                 break;
2391                         if (cur->key.op == OP_ASSIGN_FINAL)
2392                                 event->group_final = 1;
2393                         event->gid = cur->key.gid;
2394                         info(event->udev, "GROUP %u %s:%u\n",
2395                              event->gid,
2396                              &rules->buf[rule->rule.filename_off],
2397                              rule->rule.filename_line);
2398                         break;
2399                 case TK_A_MODE_ID:
2400                         if (event->mode_final)
2401                                 break;
2402                         if (cur->key.op == OP_ASSIGN_FINAL)
2403                                 event->mode_final = 1;
2404                         event->mode = cur->key.mode;
2405                         info(event->udev, "MODE %#o %s:%u\n",
2406                              event->mode,
2407                              &rules->buf[rule->rule.filename_off],
2408                              rule->rule.filename_line);
2409                         break;
2410                 case TK_A_ENV:
2411                         {
2412                                 const char *name = &rules->buf[cur->key.attr_off];
2413                                 char *value = &rules->buf[cur->key.value_off];
2414
2415                                 if (value[0] != '\0') {
2416                                         char temp_value[UTIL_NAME_SIZE];
2417                                         struct udev_list_entry *entry;
2418
2419                                         udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2420                                         entry = udev_device_add_property(event->dev, name, temp_value);
2421                                         /* store in db, skip private keys */
2422                                         if (name[0] != '.')
2423                                                 udev_list_entry_set_flag(entry, 1);
2424                                 } else {
2425                                         udev_device_add_property(event->dev, name, NULL);
2426                                 }
2427                                 break;
2428                         }
2429                 case TK_A_NAME:
2430                         {
2431                                 const char *name  = &rules->buf[cur->key.value_off];
2432                                 char name_str[UTIL_PATH_SIZE];
2433                                 int count;
2434
2435                                 if (event->name_final)
2436                                         break;
2437                                 if (cur->key.op == OP_ASSIGN_FINAL)
2438                                         event->name_final = 1;
2439                                 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2440                                 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2441                                         count = udev_util_replace_chars(name_str, "/");
2442                                         if (count > 0)
2443                                                 info(event->udev, "%i character(s) replaced\n", count);
2444                                 }
2445                                 free(event->name);
2446                                 event->name = strdup(name_str);
2447                                 info(event->udev, "NAME '%s' %s:%u\n",
2448                                      event->name,
2449                                      &rules->buf[rule->rule.filename_off],
2450                                      rule->rule.filename_line);
2451                                 break;
2452                         }
2453                 case TK_A_DEVLINK:
2454                         {
2455                                 char temp[UTIL_PATH_SIZE];
2456                                 char filename[UTIL_PATH_SIZE];
2457                                 char *pos, *next;
2458                                 int count = 0;
2459
2460                                 if (event->devlink_final)
2461                                         break;
2462                                 if (major(udev_device_get_devnum(event->dev)) == 0)
2463                                         break;
2464                                 if (cur->key.op == OP_ASSIGN_FINAL)
2465                                         event->devlink_final = 1;
2466                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2467                                         udev_device_cleanup_devlinks_list(event->dev);
2468
2469                                 /* allow  multiple symlinks separated by spaces */
2470                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2471                                 if (esc == ESCAPE_UNSET)
2472                                         count = udev_util_replace_chars(temp, "/ ");
2473                                 else if (esc == ESCAPE_REPLACE)
2474                                         count = udev_util_replace_chars(temp, "/");
2475                                 if (count > 0)
2476                                         info(event->udev, "%i character(s) replaced\n" , count);
2477                                 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2478                                 pos = temp;
2479                                 while (isspace(pos[0]))
2480                                         pos++;
2481                                 next = strchr(pos, ' ');
2482                                 while (next != NULL) {
2483                                         next[0] = '\0';
2484                                         info(event->udev, "LINK '%s' %s:%u\n", pos,
2485                                              &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2486                                         util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2487                                         udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2488                                         while (isspace(next[1]))
2489                                                 next++;
2490                                         pos = &next[1];
2491                                         next = strchr(pos, ' ');
2492                                 }
2493                                 if (pos[0] != '\0') {
2494                                         info(event->udev, "LINK '%s' %s:%u\n", pos,
2495                                              &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2496                                         util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2497                                         udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2498                                 }
2499                         }
2500                         break;
2501                 case TK_A_EVENT_TIMEOUT:
2502                         udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2503                         break;
2504                 case TK_A_IGNORE_REMOVE:
2505                         udev_device_set_ignore_remove(event->dev, 1);
2506                         break;
2507                 case TK_A_ATTR:
2508                         {
2509                                 const char *key_name = &rules->buf[cur->key.attr_off];
2510                                 char attr[UTIL_PATH_SIZE];
2511                                 char value[UTIL_NAME_SIZE];
2512                                 FILE *f;
2513
2514                                 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2515                                         util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2516                                 attr_subst_subdir(attr, sizeof(attr));
2517
2518                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2519                                 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2520                                      &rules->buf[rule->rule.filename_off],
2521                                      rule->rule.filename_line);
2522                                 f = fopen(attr, "w");
2523                                 if (f != NULL) {
2524                                         if (fprintf(f, "%s", value) <= 0)
2525                                                 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2526                                         fclose(f);
2527                                 } else {
2528                                         err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2529                                 }
2530                                 break;
2531                         }
2532                 case TK_A_RUN:
2533                         {
2534                                 struct udev_list_entry *list_entry;
2535
2536                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2537                                         udev_list_cleanup_entries(event->udev, &event->run_list);
2538                                 info(event->udev, "RUN '%s' %s:%u\n",
2539                                      &rules->buf[cur->key.value_off],
2540                                      &rules->buf[rule->rule.filename_off],
2541                                      rule->rule.filename_line);
2542                                 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2543                                                                  &rules->buf[cur->key.value_off], NULL, 1, 0);
2544                                 if (cur->key.fail_on_error)
2545                                         udev_list_entry_set_flag(list_entry, 1);
2546                                 break;
2547                         }
2548                 case TK_A_GOTO:
2549                         if (cur->key.rule_goto == 0)
2550                                 break;
2551                         cur = &rules->tokens[cur->key.rule_goto];
2552                         continue;
2553                 case TK_END:
2554                         return 0;
2555
2556                 case TK_M_PARENTS_MIN:
2557                 case TK_M_PARENTS_MAX:
2558                 case TK_M_MAX:
2559                 case TK_UNSET:
2560                         err(rules->udev, "wrong type %u\n", cur->type);
2561                         goto nomatch;
2562                 }
2563
2564                 cur++;
2565                 continue;
2566         nomatch:
2567                 /* fast-forward to next rule */
2568                 cur = rule + rule->rule.token_count;
2569                 dbg(rules->udev, "forward to rule: %u\n",
2570                                  (unsigned int) (cur - rules->tokens));
2571         }
2572 }