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 <string.h>
  23 #include <stdio.h>
  24 #include <fcntl.h>
  25 #include <ctype.h>
  26 #include <unistd.h>
  27 #include <errno.h>
  28 #include <dirent.h>
  29 #include <fnmatch.h>
  30 #include <time.h>
  31
  32 #include "udev.h"
  33
  34 #define PREALLOC_TOKEN                  2048
  35 #define PREALLOC_STRBUF                 32 * 1024
  36 #define PREALLOC_TRIE                   256
  37
  38 struct uid_gid {
  39         unsigned int name_off;
  40         union {
  41                 uid_t   uid;
  42                 gid_t   gid;
  43         };
  44 };
  45
  46 struct trie_node {
  47         /* this node's first child */
  48         unsigned int child_idx;
  49         /* the next child of our parent node's child list */
  50         unsigned int next_child_idx;
  51         /* this node's last child (shortcut for append) */
  52         unsigned int last_child_idx;
  53         unsigned int value_off;
  54         unsigned short value_len;
  55         unsigned char key;
  56 };
  57
  58 struct udev_rules {
  59         struct udev *udev;
  60         int resolve_names;
  61
  62         /* every key in the rules file becomes a token */
  63         struct token *tokens;
  64         unsigned int token_cur;
  65         unsigned int token_max;
  66
  67         /* all key strings are copied to a single string buffer */
  68         char *buf;
  69         size_t buf_cur;
  70         size_t buf_max;
  71         unsigned int buf_count;
  72
  73         /* during rule parsing, strings are indexed to find duplicates */
  74         struct trie_node *trie_nodes;
  75         unsigned int trie_nodes_cur;
  76         unsigned int trie_nodes_max;
  77
  78         /* during rule parsing, uid/gid lookup results are cached */
  79         struct uid_gid *uids;
  80         unsigned int uids_cur;
  81         unsigned int uids_max;
  82         struct uid_gid *gids;
  83         unsigned int gids_cur;
  84         unsigned int gids_max;
  85 };
  86
  87 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
  88 enum operation_type {
  89         OP_UNSET,
  90
  91         OP_MATCH,
  92         OP_NOMATCH,
  93         OP_MATCH_MAX,
  94
  95         OP_ADD,
  96         OP_ASSIGN,
  97         OP_ASSIGN_FINAL,
  98 };
  99
 100 enum string_glob_type {
 101         GL_UNSET,
 102         GL_PLAIN,                       /* no special chars */
 103         GL_GLOB,                        /* shell globs ?,*,[] */
 104         GL_SPLIT,                       /* multi-value A|B */
 105         GL_SPLIT_GLOB,                  /* multi-value with glob A*|B* */
 106         GL_SOMETHING,                   /* commonly used "?*" */
 107 };
 108
 109 enum string_subst_type {
 110         SB_UNSET,
 111         SB_NONE,
 112         SB_FORMAT,
 113         SB_SUBSYS,
 114 };
 115
 116 /* tokens of a rule are sorted/handled in this order */
 117 enum token_type {
 118         TK_UNSET,
 119         TK_RULE,
 120
 121         TK_M_ACTION,                    /* val */
 122         TK_M_DEVPATH,                   /* val */
 123         TK_M_KERNEL,                    /* val */
 124         TK_M_DEVLINK,                   /* val */
 125         TK_M_NAME,                      /* val */
 126         TK_M_ENV,                       /* val, attr */
 127         TK_M_SUBSYSTEM,                 /* val */
 128         TK_M_DRIVER,                    /* val */
 129         TK_M_WAITFOR,                   /* val */
 130         TK_M_ATTR,                      /* val, attr */
 131
 132         TK_M_PARENTS_MIN,
 133         TK_M_KERNELS,                   /* val */
 134         TK_M_SUBSYSTEMS,                /* val */
 135         TK_M_DRIVERS,                   /* val */
 136         TK_M_ATTRS,                     /* val, attr */
 137         TK_M_PARENTS_MAX,
 138
 139         TK_M_TEST,                      /* val, mode_t */
 140         TK_M_PROGRAM,                   /* val */
 141         TK_M_IMPORT_FILE,               /* val */
 142         TK_M_IMPORT_PROG,               /* val */
 143         TK_M_IMPORT_PARENT,             /* val */
 144         TK_M_RESULT,                    /* val */
 145         TK_M_MAX,
 146
 147         TK_A_IGNORE_DEVICE,
 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_IGNORE_DEVICE] =          "A IGNORE_DEVICE",
 279                 [TK_A_STRING_ESCAPE_NONE] =     "A STRING_ESCAPE_NONE",
 280                 [TK_A_STRING_ESCAPE_REPLACE] =  "A STRING_ESCAPE_REPLACE",
 281                 [TK_A_INOTIFY_WATCH] =          "A INOTIFY_WATCH",
 282                 [TK_A_NUM_FAKE_PART] =          "A NUM_FAKE_PART",
 283                 [TK_A_DEVLINK_PRIO] =           "A DEVLINK_PRIO",
 284                 [TK_A_OWNER] =                  "A OWNER",
 285                 [TK_A_GROUP] =                  "A GROUP",
 286                 [TK_A_MODE] =                   "A MODE",
 287                 [TK_A_OWNER_ID] =               "A OWNER_ID",
 288                 [TK_A_GROUP_ID] =               "A GROUP_ID",
 289                 [TK_A_MODE_ID] =                "A MODE_ID",
 290                 [TK_A_ENV] =                    "A ENV",
 291                 [TK_A_NAME] =                   "A NAME",
 292                 [TK_A_DEVLINK] =                "A DEVLINK",
 293                 [TK_A_EVENT_TIMEOUT] =          "A EVENT_TIMEOUT",
 294                 [TK_A_IGNORE_REMOVE] =          "A IGNORE_REMOVE",
 295                 [TK_A_ATTR] =                   "A ATTR",
 296                 [TK_A_RUN] =                    "A RUN",
 297                 [TK_A_GOTO] =                   "A GOTO",
 298
 299                 [TK_END] =                      "END",
 300         };
 301
 302         return token_strs[type];
 303 }
 304
 305 static void dump_token(struct udev_rules *rules, struct token *token)
 306 {
 307         enum token_type type = token->type;
 308         enum operation_type op = token->key.op;
 309         enum string_glob_type glob = token->key.glob;
 310         const char *value = &rules->buf[token->key.value_off];
 311         const char *attr = &rules->buf[token->key.attr_off];
 312
 313         switch (type) {
 314         case TK_RULE:
 315                 {
 316                         const char *tks_ptr = (char *)rules->tokens;
 317                         const char *tk_ptr = (char *)token;
 318                         unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
 319
 320                         dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
 321                             &rules->buf[token->rule.filename_off], token->rule.filename_line,
 322                             idx, token->rule.token_count,
 323                             &rules->buf[token->rule.label_off],
 324                             token->rule.flags);
 325                         break;
 326                 }
 327         case TK_M_ACTION:
 328         case TK_M_DEVPATH:
 329         case TK_M_KERNEL:
 330         case TK_M_SUBSYSTEM:
 331         case TK_M_DRIVER:
 332         case TK_M_WAITFOR:
 333         case TK_M_DEVLINK:
 334         case TK_M_NAME:
 335         case TK_M_KERNELS:
 336         case TK_M_SUBSYSTEMS:
 337         case TK_M_DRIVERS:
 338         case TK_M_PROGRAM:
 339         case TK_M_IMPORT_FILE:
 340         case TK_M_IMPORT_PROG:
 341         case TK_M_IMPORT_PARENT:
 342         case TK_M_RESULT:
 343         case TK_A_NAME:
 344         case TK_A_DEVLINK:
 345         case TK_A_OWNER:
 346         case TK_A_GROUP:
 347         case TK_A_MODE:
 348         case TK_A_RUN:
 349                 dbg(rules->udev, "%s %s '%s'(%s)\n",
 350                     token_str(type), operation_str(op), value, string_glob_str(glob));
 351                 break;
 352         case TK_M_ATTR:
 353         case TK_M_ATTRS:
 354         case TK_M_ENV:
 355         case TK_A_ATTR:
 356         case TK_A_ENV:
 357                 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
 358                     token_str(type), operation_str(op), attr, value, string_glob_str(glob));
 359                 break;
 360         case TK_A_IGNORE_DEVICE:
 361         case TK_A_STRING_ESCAPE_NONE:
 362         case TK_A_STRING_ESCAPE_REPLACE:
 363         case TK_A_IGNORE_REMOVE:
 364                 dbg(rules->udev, "%s\n", token_str(type));
 365                 break;
 366         case TK_M_TEST:
 367                 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
 368                     token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
 369                 break;
 370         case TK_A_INOTIFY_WATCH:
 371                 dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch);
 372                 break;
 373         case TK_A_NUM_FAKE_PART:
 374                 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
 375                 break;
 376         case TK_A_DEVLINK_PRIO:
 377                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
 378                 break;
 379         case TK_A_OWNER_ID:
 380                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
 381                 break;
 382         case TK_A_GROUP_ID:
 383                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
 384                 break;
 385         case TK_A_MODE_ID:
 386                 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
 387                 break;
 388         case TK_A_EVENT_TIMEOUT:
 389                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
 390                 break;
 391         case TK_A_GOTO:
 392                 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
 393                 break;
 394         case TK_END:
 395                 dbg(rules->udev, "* %s\n", token_str(type));
 396                 break;
 397         case TK_M_PARENTS_MIN:
 398         case TK_M_PARENTS_MAX:
 399         case TK_M_MAX:
 400         case TK_UNSET:
 401                 dbg(rules->udev, "unknown type %u\n", type);
 402                 break;
 403         }
 404 }
 405
 406 static void dump_rules(struct udev_rules *rules)
 407 {
 408         unsigned int i;
 409
 410         dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
 411             rules->token_cur,
 412             rules->token_cur * sizeof(struct token),
 413             rules->buf_count,
 414             rules->buf_cur);
 415         for(i = 0; i < rules->token_cur; i++)
 416                 dump_token(rules, &rules->tokens[i]);
 417 }
 418 #else
 419 static inline const char *operation_str(enum operation_type type) { return NULL; }
 420 static inline const char *token_str(enum token_type type) { return NULL; }
 421 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
 422 static inline void dump_rules(struct udev_rules *rules) {}
 423 #endif /* ENABLE_DEBUG */
 424
 425 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
 426 {
 427         int off;
 428
 429         /* grow buffer if needed */
 430         if (rules->buf_cur + bytes+1 >= rules->buf_max) {
 431                 char *buf;
 432                 unsigned int add;
 433
 434                 /* double the buffer size */
 435                 add = rules->buf_max;
 436                 if (add < bytes * 8)
 437                         add = bytes * 8;
 438
 439                 buf = realloc(rules->buf, rules->buf_max + add);
 440                 if (buf == NULL)
 441                         return -1;
 442                 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
 443                 rules->buf = buf;
 444                 rules->buf_max += add;
 445         }
 446         off = rules->buf_cur;
 447         memcpy(&rules->buf[rules->buf_cur], str, bytes);
 448         rules->buf_cur += bytes;
 449         rules->buf_count++;
 450         return off;
 451 }
 452
 453 static int add_string(struct udev_rules *rules, const char *str)
 454 {
 455         unsigned int node_idx;
 456         struct trie_node *new_node;
 457         unsigned int new_node_idx;
 458         unsigned char key;
 459         unsigned short len;
 460         unsigned int depth;
 461         unsigned int off;
 462         struct trie_node *parent;
 463
 464         /* walk trie, start from last character of str to find matching tails */
 465         len = strlen(str);
 466         key = str[len-1];
 467         node_idx = 0;
 468         for (depth = 0; depth <= len; depth++) {
 469                 struct trie_node *node;
 470                 unsigned int child_idx;
 471
 472                 node = &rules->trie_nodes[node_idx];
 473                 off = node->value_off + node->value_len - len;
 474
 475                 /* match against current node */
 476                 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
 477                         return off;
 478
 479                 /* lookup child node */
 480                 key = str[len - 1 - depth];
 481                 child_idx = node->child_idx;
 482                 while (child_idx > 0) {
 483                         struct trie_node *child;
 484
 485                         child = &rules->trie_nodes[child_idx];
 486                         if (child->key == key)
 487                                 break;
 488                         child_idx = child->next_child_idx;
 489                 }
 490                 if (child_idx == 0)
 491                         break;
 492                 node_idx = child_idx;
 493         }
 494
 495         /* string not found, add it */
 496         off = add_new_string(rules, str, len + 1);
 497
 498         /* grow trie nodes if needed */
 499         if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
 500                 struct trie_node *nodes;
 501                 unsigned int add;
 502
 503                 /* double the buffer size */
 504                 add = rules->trie_nodes_max;
 505                 if (add < 8)
 506                         add = 8;
 507
 508                 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
 509                 if (nodes == NULL)
 510                         return -1;
 511                 dbg(rules->udev, "extend trie nodes from %u to %u\n",
 512                     rules->trie_nodes_max, rules->trie_nodes_max + add);
 513                 rules->trie_nodes = nodes;
 514                 rules->trie_nodes_max += add;
 515         }
 516
 517         /* get a new node */
 518         new_node_idx = rules->trie_nodes_cur;
 519         rules->trie_nodes_cur++;
 520         new_node = &rules->trie_nodes[new_node_idx];
 521         memset(new_node, 0x00, sizeof(struct trie_node));
 522         new_node->value_off = off;
 523         new_node->value_len = len;
 524         new_node->key = key;
 525
 526         /* join the parent's child list */
 527         parent = &rules->trie_nodes[node_idx];
 528         if (parent->child_idx == 0) {
 529                 parent->child_idx = new_node_idx;
 530         } else {
 531                 struct trie_node *last_child;
 532
 533                 last_child = &rules->trie_nodes[parent->last_child_idx];
 534                 last_child->next_child_idx = new_node_idx;
 535         }
 536         parent->last_child_idx = new_node_idx;
 537         return off;
 538 }
 539
 540 static int add_token(struct udev_rules *rules, struct token *token)
 541 {
 542         /* grow buffer if needed */
 543         if (rules->token_cur+1 >= rules->token_max) {
 544                 struct token *tokens;
 545                 unsigned int add;
 546
 547                 /* double the buffer size */
 548                 add = rules->token_max;
 549                 if (add < 8)
 550                         add = 8;
 551
 552                 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
 553                 if (tokens == NULL)
 554                         return -1;
 555                 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
 556                 rules->tokens = tokens;
 557                 rules->token_max += add;
 558         }
 559         memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
 560         rules->token_cur++;
 561         return 0;
 562 }
 563
 564 static uid_t add_uid(struct udev_rules *rules, const char *owner)
 565 {
 566         unsigned int i;
 567         uid_t uid;
 568         unsigned int off;
 569
 570         /* lookup, if we know it already */
 571         for (i = 0; i < rules->uids_cur; i++) {
 572                 off = rules->uids[i].name_off;
 573                 if (strcmp(&rules->buf[off], owner) == 0) {
 574                         uid = rules->uids[i].uid;
 575                         dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
 576                         return uid;
 577                 }
 578         }
 579         uid = util_lookup_user(rules->udev, owner);
 580
 581         /* grow buffer if needed */
 582         if (rules->uids_cur+1 >= rules->uids_max) {
 583                 struct uid_gid *uids;
 584                 unsigned int add;
 585
 586                 /* double the buffer size */
 587                 add = rules->uids_max;
 588                 if (add < 1)
 589                         add = 8;
 590
 591                 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
 592                 if (uids == NULL)
 593                         return uid;
 594                 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
 595                 rules->uids = uids;
 596                 rules->uids_max += add;
 597         }
 598         rules->uids[rules->uids_cur].uid = uid;
 599         off = add_string(rules, owner);
 600         if (off <= 0)
 601                 return uid;
 602         rules->uids[rules->uids_cur].name_off = off;
 603         rules->uids_cur++;
 604         return uid;
 605 }
 606
 607 static gid_t add_gid(struct udev_rules *rules, const char *group)
 608 {
 609         unsigned int i;
 610         gid_t gid;
 611         unsigned int off;
 612
 613         /* lookup, if we know it already */
 614         for (i = 0; i < rules->gids_cur; i++) {
 615                 off = rules->gids[i].name_off;
 616                 if (strcmp(&rules->buf[off], group) == 0) {
 617                         gid = rules->gids[i].gid;
 618                         dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
 619                         return gid;
 620                 }
 621         }
 622         gid = util_lookup_group(rules->udev, group);
 623
 624         /* grow buffer if needed */
 625         if (rules->gids_cur+1 >= rules->gids_max) {
 626                 struct uid_gid *gids;
 627                 unsigned int add;
 628
 629                 /* double the buffer size */
 630                 add = rules->gids_max;
 631                 if (add < 1)
 632                         add = 8;
 633
 634                 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
 635                 if (gids == NULL)
 636                         return gid;
 637                 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
 638                 rules->gids = gids;
 639                 rules->gids_max += add;
 640         }
 641         rules->gids[rules->gids_cur].gid = gid;
 642         off = add_string(rules, group);
 643         if (off <= 0)
 644                 return gid;
 645         rules->gids[rules->gids_cur].name_off = off;
 646         rules->gids_cur++;
 647         return gid;
 648 }
 649
 650 static int import_property_from_string(struct udev_device *dev, char *line)
 651 {
 652         struct udev *udev = udev_device_get_udev(dev);
 653         char *key;
 654         char *val;
 655         size_t len;
 656
 657         /* find key */
 658         key = line;
 659         while (isspace(key[0]))
 660                 key++;
 661
 662         /* comment or empty line */
 663         if (key[0] == '#' || key[0] == '\0')
 664                 return -1;
 665
 666         /* split key/value */
 667         val = strchr(key, '=');
 668         if (val == NULL)
 669                 return -1;
 670         val[0] = '\0';
 671         val++;
 672
 673         /* find value */
 674         while (isspace(val[0]))
 675                 val++;
 676
 677         /* terminate key */
 678         len = strlen(key);
 679         if (len == 0)
 680                 return -1;
 681         while (isspace(key[len-1]))
 682                 len--;
 683         key[len] = '\0';
 684
 685         /* terminate value */
 686         len = strlen(val);
 687         if (len == 0)
 688                 return -1;
 689         while (isspace(val[len-1]))
 690                 len--;
 691         val[len] = '\0';
 692
 693         if (len == 0)
 694                 return -1;
 695
 696         /* unquote */
 697         if (val[0] == '"' || val[0] == '\'') {
 698                 if (val[len-1] != val[0]) {
 699                         info(udev, "inconsistent quoting: '%s', skip\n", line);
 700                         return -1;
 701                 }
 702                 val[len-1] = '\0';
 703                 val++;
 704         }
 705
 706         dbg(udev, "adding '%s'='%s'\n", key, val);
 707
 708         /* handle device, renamed by external tool, returning new path */
 709         if (strcmp(key, "DEVPATH") == 0) {
 710                 char syspath[UTIL_PATH_SIZE];
 711
 712                 info(udev, "updating devpath from '%s' to '%s'\n",
 713                      udev_device_get_devpath(dev), val);
 714                 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL);
 715                 udev_device_set_syspath(dev, syspath);
 716         } else {
 717                 struct udev_list_entry *entry;
 718
 719                 entry = udev_device_add_property(dev, key, val);
 720                 /* store in db, skip private keys */
 721                 if (key[0] != '.')
 722                         udev_list_entry_set_flag(entry, 1);
 723         }
 724         return 0;
 725 }
 726
 727 static int import_file_into_properties(struct udev_device *dev, const char *filename)
 728 {
 729         FILE *f;
 730         char line[UTIL_LINE_SIZE];
 731
 732         f = fopen(filename, "r");
 733         if (f == NULL)
 734                 return -1;
 735         while (fgets(line, sizeof(line), f) != NULL)
 736                 import_property_from_string(dev, line);
 737         fclose(f);
 738         return 0;
 739 }
 740
 741 static int import_program_into_properties(struct udev_device *dev, const char *program)
 742 {
 743         struct udev *udev = udev_device_get_udev(dev);
 744         char **envp;
 745         char result[4096];
 746         size_t reslen;
 747         char *line;
 748
 749         envp = udev_device_get_properties_envp(dev);
 750         if (util_run_program(udev, program, envp, result, sizeof(result), &reslen, NULL) != 0)
 751                 return -1;
 752
 753         line = result;
 754         while (line != NULL) {
 755                 char *pos;
 756
 757                 pos = strchr(line, '\n');
 758                 if (pos != NULL) {
 759                         pos[0] = '\0';
 760                         pos = &pos[1];
 761                 }
 762                 import_property_from_string(dev, line);
 763                 line = pos;
 764         }
 765         return 0;
 766 }
 767
 768 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
 769 {
 770         struct udev *udev = udev_device_get_udev(dev);
 771         struct udev_device *dev_parent;
 772         struct udev_list_entry *list_entry;
 773
 774         dev_parent = udev_device_get_parent(dev);
 775         if (dev_parent == NULL)
 776                 return -1;
 777
 778         dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
 779         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
 780                 const char *key = udev_list_entry_get_name(list_entry);
 781                 const char *val = udev_list_entry_get_value(list_entry);
 782
 783                 if (fnmatch(filter, key, 0) == 0) {
 784                         struct udev_list_entry *entry;
 785
 786                         dbg(udev, "import key '%s=%s'\n", key, val);
 787                         entry = udev_device_add_property(dev, key, val);
 788                         /* store in db, skip private keys */
 789                         if (key[0] != '.')
 790                                 udev_list_entry_set_flag(entry, 1);
 791                 }
 792         }
 793         return 0;
 794 }
 795
 796 #define WAIT_LOOP_PER_SECOND            50
 797 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
 798 {
 799         struct udev *udev = udev_device_get_udev(dev);
 800         char filepath[UTIL_PATH_SIZE];
 801         char devicepath[UTIL_PATH_SIZE];
 802         struct stat stats;
 803         int loop = timeout * WAIT_LOOP_PER_SECOND;
 804
 805         /* a relative path is a device attribute */
 806         devicepath[0] = '\0';
 807         if (file[0] != '/') {
 808                 util_strscpyl(devicepath, sizeof(devicepath),
 809                               udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL);
 810                 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
 811                 file = filepath;
 812         }
 813
 814         dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
 815         while (--loop) {
 816                 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
 817
 818                 /* lookup file */
 819                 if (stat(file, &stats) == 0) {
 820                         info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
 821                         return 0;
 822                 }
 823                 /* make sure, the device did not disappear in the meantime */
 824                 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
 825                         info(udev, "device disappeared while waiting for '%s'\n", file);
 826                         return -2;
 827                 }
 828                 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
 829                 nanosleep(&duration, NULL);
 830         }
 831         info(udev, "waiting for '%s' failed\n", file);
 832         return -1;
 833 }
 834
 835 static int attr_subst_subdir(char *attr, size_t len)
 836 {
 837         int found = 0;
 838
 839         if (strstr(attr, "/*/")) {
 840                 char *pos;
 841                 char dirname[UTIL_PATH_SIZE];
 842                 const char *tail;
 843                 DIR *dir;
 844
 845                 util_strscpy(dirname, sizeof(dirname), attr);
 846                 pos = strstr(dirname, "/*/");
 847                 if (pos == NULL)
 848                         return -1;
 849                 pos[0] = '\0';
 850                 tail = &pos[2];
 851                 dir = opendir(dirname);
 852                 if (dir != NULL) {
 853                         struct dirent *dent;
 854
 855                         for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 856                                 struct stat stats;
 857
 858                                 if (dent->d_name[0] == '.')
 859                                         continue;
 860                                 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
 861                                 if (stat(attr, &stats) == 0) {
 862                                         found = 1;
 863                                         break;
 864                                 }
 865                         }
 866                         closedir(dir);
 867                 }
 868         }
 869
 870         return found;
 871 }
 872
 873 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
 874 {
 875         char *linepos;
 876         char *temp;
 877
 878         linepos = *line;
 879         if (linepos == NULL || linepos[0] == '\0')
 880                 return -1;
 881
 882         /* skip whitespace */
 883         while (isspace(linepos[0]) || linepos[0] == ',')
 884                 linepos++;
 885
 886         /* get the key */
 887         if (linepos[0] == '\0')
 888                 return -1;
 889         *key = linepos;
 890
 891         while (1) {
 892                 linepos++;
 893                 if (linepos[0] == '\0')
 894                         return -1;
 895                 if (isspace(linepos[0]))
 896                         break;
 897                 if (linepos[0] == '=')
 898                         break;
 899                 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
 900                         if (linepos[1] == '=')
 901                                 break;
 902         }
 903
 904         /* remember end of key */
 905         temp = linepos;
 906
 907         /* skip whitespace after key */
 908         while (isspace(linepos[0]))
 909                 linepos++;
 910         if (linepos[0] == '\0')
 911                 return -1;
 912
 913         /* get operation type */
 914         if (linepos[0] == '=' && linepos[1] == '=') {
 915                 *op = OP_MATCH;
 916                 linepos += 2;
 917         } else if (linepos[0] == '!' && linepos[1] == '=') {
 918                 *op = OP_NOMATCH;
 919                 linepos += 2;
 920         } else if (linepos[0] == '+' && linepos[1] == '=') {
 921                 *op = OP_ADD;
 922                 linepos += 2;
 923         } else if (linepos[0] == '=') {
 924                 *op = OP_ASSIGN;
 925                 linepos++;
 926         } else if (linepos[0] == ':' && linepos[1] == '=') {
 927                 *op = OP_ASSIGN_FINAL;
 928                 linepos += 2;
 929         } else
 930                 return -1;
 931
 932         /* terminate key */
 933         temp[0] = '\0';
 934
 935         /* skip whitespace after operator */
 936         while (isspace(linepos[0]))
 937                 linepos++;
 938         if (linepos[0] == '\0')
 939                 return -1;
 940
 941         /* get the value */
 942         if (linepos[0] == '"')
 943                 linepos++;
 944         else
 945                 return -1;
 946         *value = linepos;
 947
 948         /* terminate */
 949         temp = strchr(linepos, '"');
 950         if (!temp)
 951                 return -1;
 952         temp[0] = '\0';
 953         temp++;
 954         dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
 955
 956         /* move line to next key */
 957         *line = temp;
 958         return 0;
 959 }
 960
 961 /* extract possible KEY{attr} */
 962 static char *get_key_attribute(struct udev *udev, char *str)
 963 {
 964         char *pos;
 965         char *attr;
 966
 967         attr = strchr(str, '{');
 968         if (attr != NULL) {
 969                 attr++;
 970                 pos = strchr(attr, '}');
 971                 if (pos == NULL) {
 972                         err(udev, "missing closing brace for format\n");
 973                         return NULL;
 974                 }
 975                 pos[0] = '\0';
 976                 dbg(udev, "attribute='%s'\n", attr);
 977                 return attr;
 978         }
 979         return NULL;
 980 }
 981
 982 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
 983                         enum operation_type op,
 984                         const char *value, const void *data)
 985 {
 986         struct token *token = &rule_tmp->token[rule_tmp->token_cur];
 987         const char *attr = NULL;
 988
 989         memset(token, 0x00, sizeof(struct token));
 990
 991         switch (type) {
 992         case TK_M_ACTION:
 993         case TK_M_DEVPATH:
 994         case TK_M_KERNEL:
 995         case TK_M_SUBSYSTEM:
 996         case TK_M_DRIVER:
 997         case TK_M_WAITFOR:
 998         case TK_M_DEVLINK:
 999         case TK_M_NAME:
1000         case TK_M_KERNELS:
1001         case TK_M_SUBSYSTEMS:
1002         case TK_M_DRIVERS:
1003         case TK_M_PROGRAM:
1004         case TK_M_IMPORT_FILE:
1005         case TK_M_IMPORT_PROG:
1006         case TK_M_IMPORT_PARENT:
1007         case TK_M_RESULT:
1008         case TK_A_OWNER:
1009         case TK_A_GROUP:
1010         case TK_A_MODE:
1011         case TK_A_NAME:
1012         case TK_A_GOTO:
1013                 token->key.value_off = add_string(rule_tmp->rules, value);
1014                 break;
1015         case TK_M_ENV:
1016         case TK_M_ATTR:
1017         case TK_M_ATTRS:
1018         case TK_A_ATTR:
1019         case TK_A_ENV:
1020                 attr = data;
1021                 token->key.value_off = add_string(rule_tmp->rules, value);
1022                 token->key.attr_off = add_string(rule_tmp->rules, attr);
1023                 break;
1024         case TK_A_DEVLINK:
1025                 token->key.value_off = add_string(rule_tmp->rules, value);
1026                 token->key.devlink_unique = *(int *)data;
1027                 break;
1028         case TK_M_TEST:
1029                 token->key.value_off = add_string(rule_tmp->rules, value);
1030                 if (data != NULL)
1031                         token->key.mode = *(mode_t *)data;
1032                 break;
1033         case TK_A_IGNORE_DEVICE:
1034         case TK_A_STRING_ESCAPE_NONE:
1035         case TK_A_STRING_ESCAPE_REPLACE:
1036         case TK_A_IGNORE_REMOVE:
1037                 break;
1038         case TK_A_RUN:
1039                 token->key.value_off = add_string(rule_tmp->rules, value);
1040                 token->key.fail_on_error = *(int *)data;
1041                 break;
1042         case TK_A_INOTIFY_WATCH:
1043         case TK_A_NUM_FAKE_PART:
1044         case TK_A_DEVLINK_PRIO:
1045                 token->key.devlink_prio = *(int *)data;
1046                 break;
1047         case TK_A_OWNER_ID:
1048                 token->key.uid = *(uid_t *)data;
1049                 break;
1050         case TK_A_GROUP_ID:
1051                 token->key.gid = *(gid_t *)data;
1052                 break;
1053         case TK_A_MODE_ID:
1054                 token->key.mode = *(mode_t *)data;
1055                 break;
1056         case TK_A_EVENT_TIMEOUT:
1057                 token->key.event_timeout = *(int *)data;
1058                 break;
1059         case TK_RULE:
1060         case TK_M_PARENTS_MIN:
1061         case TK_M_PARENTS_MAX:
1062         case TK_M_MAX:
1063         case TK_END:
1064         case TK_UNSET:
1065                 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1066                 return -1;
1067         }
1068
1069         if (value != NULL && type < TK_M_MAX) {
1070                 /* check if we need to split or call fnmatch() while matching rules */
1071                 enum string_glob_type glob;
1072                 int has_split;
1073                 int has_glob;
1074
1075                 has_split = (strchr(value, '|') != NULL);
1076                 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1077                 if (has_split && has_glob) {
1078                         glob = GL_SPLIT_GLOB;
1079                 } else if (has_split) {
1080                         glob = GL_SPLIT;
1081                 } else if (has_glob) {
1082                         if (strcmp(value, "?*") == 0)
1083                                 glob = GL_SOMETHING;
1084                         else
1085                                 glob = GL_GLOB;
1086                 } else {
1087                         glob = GL_PLAIN;
1088                 }
1089                 token->key.glob = glob;
1090         }
1091
1092         if (value != NULL && type > TK_M_MAX) {
1093                 /* check if assigned value has substitution chars */
1094                 if (value[0] == '[')
1095                         token->key.subst = SB_SUBSYS;
1096                 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1097                         token->key.subst = SB_FORMAT;
1098                 else
1099                         token->key.subst = SB_NONE;
1100         }
1101
1102         if (attr != NULL) {
1103                 /* check if property/attribut name has substitution chars */
1104                 if (attr[0] == '[')
1105                         token->key.attrsubst = SB_SUBSYS;
1106                 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1107                         token->key.attrsubst = SB_FORMAT;
1108                 else
1109                         token->key.attrsubst = SB_NONE;
1110         }
1111
1112         token->key.type = type;
1113         token->key.op = op;
1114         rule_tmp->token_cur++;
1115         if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1116                 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1117                 return -1;
1118         }
1119         return 0;
1120 }
1121
1122 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1123 {
1124         unsigned int i;
1125         unsigned int start = 0;
1126         unsigned int end = rule_tmp->token_cur;
1127
1128         for (i = 0; i < rule_tmp->token_cur; i++) {
1129                 enum token_type next_val = TK_UNSET;
1130                 unsigned int next_idx = 0;
1131                 unsigned int j;
1132
1133                 /* find smallest value */
1134                 for (j = start; j < end; j++) {
1135                         if (rule_tmp->token[j].type == TK_UNSET)
1136                                 continue;
1137                         if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1138                                 next_val = rule_tmp->token[j].type;
1139                                 next_idx = j;
1140                         }
1141                 }
1142
1143                 /* add token and mark done */
1144                 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1145                         return -1;
1146                 rule_tmp->token[next_idx].type = TK_UNSET;
1147
1148                 /* shrink range */
1149                 if (next_idx == start)
1150                         start++;
1151                 if (next_idx+1 == end)
1152                         end--;
1153         }
1154         return 0;
1155 }
1156
1157 static int add_rule(struct udev_rules *rules, char *line,
1158                     const char *filename, unsigned int filename_off, unsigned int lineno)
1159 {
1160         char *linepos;
1161         char *attr;
1162         struct rule_tmp rule_tmp;
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                     strcmp(key, "ID") == 0) {
1249                         if (op > OP_MATCH_MAX) {
1250                                 err(rules->udev, "invalid KERNELS operation\n");
1251                                 goto invalid;
1252                         }
1253                         rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1254                         continue;
1255                 }
1256
1257                 if (strcmp(key, "SUBSYSTEMS") == 0 ||
1258                     strcmp(key, "BUS") == 0) {
1259                         if (op > OP_MATCH_MAX) {
1260                                 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1261                                 goto invalid;
1262                         }
1263                         rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1264                         continue;
1265                 }
1266
1267                 if (strcmp(key, "DRIVERS") == 0) {
1268                         if (op > OP_MATCH_MAX) {
1269                                 err(rules->udev, "invalid DRIVERS operation\n");
1270                                 goto invalid;
1271                         }
1272                         rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1273                         continue;
1274                 }
1275
1276                 if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1277                     strncmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1278                         if (op > OP_MATCH_MAX) {
1279                                 err(rules->udev, "invalid ATTRS operation\n");
1280                                 goto invalid;
1281                         }
1282                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1283                         if (attr == NULL) {
1284                                 err(rules->udev, "error parsing ATTRS attribute\n");
1285                                 goto invalid;
1286                         }
1287                         if (strncmp(attr, "device/", 7) == 0)
1288                                 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1289                                     "please fix it in %s:%u", filename, lineno);
1290                         else if (strstr(attr, "../") != NULL)
1291                                 err(rules->udev, "do not reference parent sysfs directories directly, "
1292                                     "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1293                         rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1294                         continue;
1295                 }
1296
1297                 if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1298                         attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1299                         if (attr == NULL) {
1300                                 err(rules->udev, "error parsing ENV attribute\n");
1301                                 goto invalid;
1302                         }
1303                         if (op < OP_MATCH_MAX) {
1304                                 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1305                                         goto invalid;
1306                         } else {
1307                                 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1308                                         goto invalid;
1309                         }
1310                         continue;
1311                 }
1312
1313                 if (strcmp(key, "PROGRAM") == 0) {
1314                         rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1315                         continue;
1316                 }
1317
1318                 if (strcmp(key, "RESULT") == 0) {
1319                         if (op > OP_MATCH_MAX) {
1320                                 err(rules->udev, "invalid RESULT operation\n");
1321                                 goto invalid;
1322                         }
1323                         rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1324                         continue;
1325                 }
1326
1327                 if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1328                         attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1329                         if (attr != NULL && strstr(attr, "program")) {
1330                                 dbg(rules->udev, "IMPORT will be executed\n");
1331                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1332                         } else if (attr != NULL && strstr(attr, "file")) {
1333                                 dbg(rules->udev, "IMPORT will be included as file\n");
1334                                 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1335                         } else if (attr != NULL && strstr(attr, "parent")) {
1336                                 dbg(rules->udev, "IMPORT will include the parent values\n");
1337                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1338                         } else {
1339                                 /* figure it out if it is executable */
1340                                 char file[UTIL_PATH_SIZE];
1341                                 char *pos;
1342                                 struct stat statbuf;
1343
1344                                 /* allow programs in /lib/udev called without the path */
1345                                 if (value[0] != '/')
1346                                         util_strscpyl(file, sizeof(file), LIBEXECDIR "/", value, NULL);
1347                                 else
1348                                         util_strscpy(file, sizeof(file), value);
1349                                 pos = strchr(file, ' ');
1350                                 if (pos)
1351                                         pos[0] = '\0';
1352                                 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1353                                 if (stat(file, &statbuf) == 0 && (statbuf.st_mode & S_IXUSR)) {
1354                                         dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1355                                         rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1356                                 } else {
1357                                         dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1358                                         rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1359                                 }
1360                         }
1361                         continue;
1362                 }
1363
1364                 if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) {
1365                         mode_t mode = 0;
1366
1367                         if (op > OP_MATCH_MAX) {
1368                                 err(rules->udev, "invalid TEST operation\n");
1369                                 goto invalid;
1370                         }
1371                         attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1372                         if (attr != NULL) {
1373                                 mode = strtol(attr, NULL, 8);
1374                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1375                         } else {
1376                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1377                         }
1378                         continue;
1379                 }
1380
1381                 if (strncmp(key, "RUN", sizeof("RUN")-1) == 0) {
1382                         int flag = 0;
1383
1384                         attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1385                         if (attr != NULL && strstr(attr, "fail_event_on_error"))
1386                                 flag = 1;
1387                         rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1388                         continue;
1389                 }
1390
1391                 if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) {
1392                         rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1393                         continue;
1394                 }
1395
1396                 if (strcmp(key, "LABEL") == 0) {
1397                         rule_tmp.rule.rule.label_off = add_string(rules, value);
1398                         continue;
1399                 }
1400
1401                 if (strcmp(key, "GOTO") == 0) {
1402                         rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1403                         continue;
1404                 }
1405
1406                 if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) {
1407                         if (op < OP_MATCH_MAX) {
1408                                 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1409                         } else {
1410                                 if (value[0] == '\0')
1411                                         info(rules->udev, "name empty, node creation suppressed\n");
1412                                 else if (strcmp(value, "%k") == 0)
1413                                         err(rules->udev, "NAME=\"%%k\" is superfluous and breaks "
1414                                             "kernel supplied names, please remove it from %s:%u\n", filename, lineno);
1415                                 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1416                                 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1417                                 if (attr != NULL) {
1418                                         if (strstr(attr, "all_partitions") != NULL) {
1419                                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1420
1421                                                 dbg(rules->udev, "creation of partition nodes requested\n");
1422                                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1423                                         }
1424                                         if (strstr(attr, "ignore_remove") != NULL) {
1425                                                 dbg(rules->udev, "remove event should be ignored\n");
1426                                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1427                                         }
1428                                 }
1429                         }
1430                         rule_tmp.rule.rule.flags = 1;
1431                         continue;
1432                 }
1433
1434                 if (strncmp(key, "SYMLINK", sizeof("SYMLINK")-1) == 0) {
1435                         if (op < OP_MATCH_MAX) {
1436                                 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1437                         } else {
1438                                 int flag = 0;
1439
1440                                 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1441                                 if (attr != NULL && strstr(attr, "unique") != NULL)
1442                                         flag = 1;
1443                                 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1444                         }
1445                         rule_tmp.rule.rule.flags = 1;
1446                         continue;
1447                 }
1448
1449                 if (strcmp(key, "OWNER") == 0) {
1450                         uid_t uid;
1451                         char *endptr;
1452
1453                         uid = strtoul(value, &endptr, 10);
1454                         if (endptr[0] == '\0') {
1455                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1456                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1457                                 uid = add_uid(rules, value);
1458                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1459                         } else if (rules->resolve_names >= 0) {
1460                                 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1461                         }
1462                         rule_tmp.rule.rule.flags = 1;
1463                         continue;
1464                 }
1465
1466                 if (strcmp(key, "GROUP") == 0) {
1467                         gid_t gid;
1468                         char *endptr;
1469
1470                         gid = strtoul(value, &endptr, 10);
1471                         if (endptr[0] == '\0') {
1472                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1473                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1474                                 gid = add_gid(rules, value);
1475                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1476                         } else if (rules->resolve_names >= 0) {
1477                                 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1478                         }
1479                         rule_tmp.rule.rule.flags = 1;
1480                         continue;
1481                 }
1482
1483                 if (strcmp(key, "MODE") == 0) {
1484                         mode_t mode;
1485                         char *endptr;
1486
1487                         mode = strtol(value, &endptr, 8);
1488                         if (endptr[0] == '\0')
1489                                 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1490                         else
1491                                 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1492                         rule_tmp.rule.rule.flags = 1;
1493                         continue;
1494                 }
1495
1496                 if (strcmp(key, "OPTIONS") == 0) {
1497                         const char *pos;
1498
1499                         if (strstr(value, "ignore_device") != NULL) {
1500                                 dbg(rules->udev, "device should be ignored\n");
1501                                 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1502                         }
1503                         if (strstr(value, "ignore_remove") != NULL) {
1504                                 dbg(rules->udev, "remove event should be ignored\n");
1505                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1506                         }
1507                         pos = strstr(value, "link_priority=");
1508                         if (pos != NULL) {
1509                                 int prio = atoi(&pos[strlen("link_priority=")]);
1510
1511                                 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1512                                 dbg(rules->udev, "link priority=%i\n", prio);
1513                         }
1514                         pos = strstr(value, "event_timeout=");
1515                         if (pos != NULL) {
1516                                 int tout = atoi(&pos[strlen("event_timeout=")]);
1517
1518                                 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1519                                 dbg(rules->udev, "event timeout=%i\n", tout);
1520                         }
1521                         pos = strstr(value, "string_escape=");
1522                         if (pos != NULL) {
1523                                 pos = &pos[strlen("string_escape=")];
1524                                 if (strncmp(pos, "none", strlen("none")) == 0)
1525                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1526                                 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1527                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1528                         }
1529                         if (strstr(value, "all_partitions") != NULL) {
1530                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1531
1532                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1533                                 dbg(rules->udev, "creation of partition nodes requested\n");
1534                         }
1535                         pos = strstr(value, "nowatch");
1536                         if (pos != NULL) {
1537                                 const int off = 0;
1538
1539                                 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &off);
1540                                 dbg(rules->udev, "inotify watch of device disabled\n");
1541                         } else {
1542                                 pos = strstr(value, "watch");
1543                                 if (pos != NULL) {
1544                                         const int on = 1;
1545
1546                                         rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &on);
1547                                         dbg(rules->udev, "inotify watch of device requested\n");
1548                                 }
1549                         }
1550                         continue;
1551                 }
1552                 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1553         }
1554
1555         /* add rule token */
1556         rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1557         if (add_token(rules, &rule_tmp.rule) != 0)
1558                 goto invalid;
1559
1560         /* add tokens to list, sorted by type */
1561         if (sort_token(rules, &rule_tmp) != 0)
1562                 goto invalid;
1563
1564         return 0;
1565 invalid:
1566         err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1567         return -1;
1568 }
1569
1570 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1571 {
1572         FILE *f;
1573         unsigned int first_token;
1574         char line[UTIL_LINE_SIZE];
1575         int line_nr = 0;
1576         unsigned int i;
1577
1578         info(rules->udev, "reading '%s' as rules file\n", filename);
1579
1580         f = fopen(filename, "r");
1581         if (f == NULL)
1582                 return -1;
1583
1584         first_token = rules->token_cur;
1585
1586         while (fgets(line, sizeof(line), f) != NULL) {
1587                 char *key;
1588                 size_t len;
1589
1590                 /* skip whitespace */
1591                 line_nr++;
1592                 key = line;
1593                 while (isspace(key[0]))
1594                         key++;
1595
1596                 /* comment */
1597                 if (key[0] == '#')
1598                         continue;
1599
1600                 len = strlen(line);
1601                 if (len < 3)
1602                         continue;
1603
1604                 /* continue reading if backslash+newline is found */
1605                 while (line[len-2] == '\\') {
1606                         if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1607                                 break;
1608                         if (strlen(&line[len-2]) < 2)
1609                                 break;
1610                         line_nr++;
1611                         len = strlen(line);
1612                 }
1613
1614                 if (len+1 >= sizeof(line)) {
1615                         err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1616                         continue;
1617                 }
1618                 add_rule(rules, key, filename, filename_off, line_nr);
1619         }
1620         fclose(f);
1621
1622         /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1623         for (i = first_token+1; i < rules->token_cur; i++) {
1624                 if (rules->tokens[i].type == TK_A_GOTO) {
1625                         char *label = &rules->buf[rules->tokens[i].key.value_off];
1626                         unsigned int j;
1627
1628                         for (j = i+1; j < rules->token_cur; j++) {
1629                                 if (rules->tokens[j].type != TK_RULE)
1630                                         continue;
1631                                 if (rules->tokens[j].rule.label_off == 0)
1632                                         continue;
1633                                 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1634                                         continue;
1635                                 rules->tokens[i].key.rule_goto = j;
1636                                 break;
1637                         }
1638                         if (rules->tokens[i].key.rule_goto == 0)
1639                                 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1640                 }
1641         }
1642         return 0;
1643 }
1644
1645 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1646 {
1647         DIR *dir;
1648         char filename[UTIL_PATH_SIZE];
1649
1650         dbg(udev, "open directory '%s'\n", dirname);
1651         dir = opendir(dirname);
1652         if (dir == NULL) {
1653                 info(udev, "unable to open '%s': %m\n", dirname);
1654                 return -1;
1655         }
1656
1657         while (1) {
1658                 struct dirent *dent;
1659
1660                 dent = readdir(dir);
1661                 if (dent == NULL || dent->d_name[0] == '\0')
1662                         break;
1663
1664                 if (dent->d_name[0] == '.')
1665                         continue;
1666
1667                 /* look for file matching with specified suffix */
1668                 if (suffix != NULL) {
1669                         const char *ext;
1670
1671                         ext = strrchr(dent->d_name, '.');
1672                         if (ext == NULL)
1673                                 continue;
1674                         if (strcmp(ext, suffix) != 0)
1675                                 continue;
1676                 }
1677                 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1678                 dbg(udev, "put file '%s' into list\n", filename);
1679                 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1680         }
1681
1682         closedir(dir);
1683         return 0;
1684 }
1685
1686 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1687 {
1688         struct udev_rules *rules;
1689         struct stat statbuf;
1690         struct udev_list_node file_list;
1691         struct udev_list_entry *file_loop, *file_tmp;
1692         struct token end_token;
1693
1694         rules = malloc(sizeof(struct udev_rules));
1695         if (rules == NULL)
1696                 return NULL;
1697         memset(rules, 0x00, sizeof(struct udev_rules));
1698         rules->udev = udev;
1699         rules->resolve_names = resolve_names;
1700         udev_list_init(&file_list);
1701
1702         /* init token array and string buffer */
1703         rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1704         if (rules->tokens == NULL)
1705                 return NULL;
1706         rules->token_max = PREALLOC_TOKEN;
1707
1708         rules->buf = malloc(PREALLOC_STRBUF);
1709         if (rules->buf == NULL)
1710                 return NULL;
1711         rules->buf_max = PREALLOC_STRBUF;
1712         /* offset 0 is always '\0' */
1713         rules->buf[0] = '\0';
1714         rules->buf_cur = 1;
1715         dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1716             rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1717
1718         rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1719         if (rules->trie_nodes == NULL)
1720                 return NULL;
1721         rules->trie_nodes_max = PREALLOC_TRIE;
1722         /* offset 0 is the trie root, with an empty string */
1723         memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1724         rules->trie_nodes_cur = 1;
1725
1726         if (udev_get_rules_path(udev) != NULL) {
1727                 /* custom rules location for testing */
1728                 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1729         } else {
1730                 char filename[PATH_MAX];
1731                 struct udev_list_node sort_list;
1732                 struct udev_list_entry *sort_loop, *sort_tmp;
1733
1734                 /* read user/custom rules */
1735                 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1736
1737                 /* read dynamic/temporary rules */
1738                 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
1739                 if (stat(filename, &statbuf) != 0) {
1740                         util_create_path(udev, filename);
1741                         udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1742                         mkdir(filename, 0755);
1743                         udev_selinux_resetfscreatecon(udev);
1744                 }
1745                 udev_list_init(&sort_list);
1746                 add_matching_files(udev, &sort_list, filename, ".rules");
1747
1748                 /* read default rules */
1749                 add_matching_files(udev, &sort_list, LIBEXECDIR "/rules.d", ".rules");
1750
1751                 /* sort all rules files by basename into list of files */
1752                 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1753                         const char *sort_name = udev_list_entry_get_name(sort_loop);
1754                         const char *sort_base = strrchr(sort_name, '/');
1755
1756                         if (sort_base == NULL)
1757                                 continue;
1758                         /* sort entry into existing list */
1759                         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1760                                 const char *file_name = udev_list_entry_get_name(file_loop);
1761                                 const char *file_base = strrchr(file_name, '/');
1762
1763                                 if (file_base == NULL)
1764                                         continue;
1765                                 if (strcmp(file_base, sort_base) == 0) {
1766                                         info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1767                                              file_name, sort_name);
1768                                         udev_list_entry_delete(sort_loop);
1769                                         sort_loop = NULL;
1770                                         break;
1771                                 }
1772                                 if (strcmp(file_base, sort_base) > 0) {
1773                                         /* found later file, insert before */
1774                                         udev_list_entry_remove(sort_loop);
1775                                         udev_list_entry_insert_before(sort_loop, file_loop);
1776                                         sort_loop = NULL;
1777                                         break;
1778                                 }
1779                         }
1780                         /* current file already handled */
1781                         if (sort_loop == NULL)
1782                                 continue;
1783                         /* no later file, append to end of list */
1784                         udev_list_entry_remove(sort_loop);
1785                         udev_list_entry_append(sort_loop, &file_list);
1786                 }
1787         }
1788
1789         /* add all filenames to the string buffer */
1790         udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1791                 const char *filename = udev_list_entry_get_name(file_loop);
1792                 unsigned int filename_off;
1793
1794                 filename_off = add_string(rules, filename);
1795                 /* the offset in the rule is limited to unsigned short */
1796                 if (filename_off < USHRT_MAX)
1797                         udev_list_entry_set_flag(file_loop, filename_off);
1798         }
1799
1800         /* parse list of files */
1801         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1802                 const char *filename = udev_list_entry_get_name(file_loop);
1803                 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1804
1805                 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1806                         parse_file(rules, filename, filename_off);
1807                 else
1808                         err(udev, "can not read '%s'\n", filename);
1809                 udev_list_entry_delete(file_loop);
1810         }
1811
1812         memset(&end_token, 0x00, sizeof(struct token));
1813         end_token.type = TK_END;
1814         add_token(rules, &end_token);
1815
1816         /* shrink allocated token and string buffer */
1817         if (rules->token_cur < rules->token_max) {
1818                 struct token *tokens;
1819
1820                 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1821                 if (tokens != NULL || rules->token_cur == 0) {
1822                         rules->tokens = tokens;
1823                         rules->token_max = rules->token_cur;
1824                 }
1825         }
1826         if (rules->buf_cur < rules->buf_max) {
1827                 char *buf;
1828
1829                 buf = realloc(rules->buf, rules->buf_cur);
1830                 if (buf != NULL || rules->buf_cur == 0) {
1831                         rules->buf = buf;
1832                         rules->buf_max = rules->buf_cur;
1833                 }
1834         }
1835         info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1836              rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1837         info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1838              rules->trie_nodes_cur * sizeof(struct trie_node),
1839              rules->trie_nodes_cur, sizeof(struct trie_node));
1840
1841         /* cleanup trie */
1842         free(rules->trie_nodes);
1843         rules->trie_nodes = NULL;
1844         rules->trie_nodes_cur = 0;
1845         rules->trie_nodes_max = 0;
1846
1847         /* cleanup uid/gid cache */
1848         free(rules->uids);
1849         rules->uids = NULL;
1850         rules->uids_cur = 0;
1851         rules->uids_max = 0;
1852         free(rules->gids);
1853         rules->gids = NULL;
1854         rules->gids_cur = 0;
1855         rules->gids_max = 0;
1856
1857         dump_rules(rules);
1858         return rules;
1859 }
1860
1861 void udev_rules_unref(struct udev_rules *rules)
1862 {
1863         if (rules == NULL)
1864                 return;
1865         free(rules->tokens);
1866         free(rules->buf);
1867         free(rules->trie_nodes);
1868         free(rules->uids);
1869         free(rules->gids);
1870         free(rules);
1871 }
1872
1873 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1874 {
1875         char *key_value = &rules->buf[token->key.value_off];
1876         char *pos;
1877         int match = 0;
1878
1879         if (val == NULL)
1880                 val = "";
1881
1882         switch (token->key.glob) {
1883         case GL_PLAIN:
1884                 match = (strcmp(key_value, val) == 0);
1885                 break;
1886         case GL_GLOB:
1887                 match = (fnmatch(key_value, val, 0) == 0);
1888                 break;
1889         case GL_SPLIT:
1890                 {
1891                         const char *split;
1892                         size_t len;
1893
1894                         split = &rules->buf[token->key.value_off];
1895                         len = strlen(val);
1896                         while (1) {
1897                                 const char *next;
1898
1899                                 next = strchr(split, '|');
1900                                 if (next != NULL) {
1901                                         size_t matchlen = (size_t)(next - split);
1902
1903                                         match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1904                                         if (match)
1905                                                 break;
1906                                 } else {
1907                                         match = (strcmp(split, val) == 0);
1908                                         break;
1909                                 }
1910                                 split = &next[1];
1911                         }
1912                         break;
1913                 }
1914         case GL_SPLIT_GLOB:
1915                 {
1916                         char value[UTIL_PATH_SIZE];
1917
1918                         util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1919                         key_value = value;
1920                         while (key_value != NULL) {
1921                                 pos = strchr(key_value, '|');
1922                                 if (pos != NULL) {
1923                                         pos[0] = '\0';
1924                                         pos = &pos[1];
1925                                 }
1926                                 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1927                                 match = (fnmatch(key_value, val, 0) == 0);
1928                                 if (match)
1929                                         break;
1930                                 key_value = pos;
1931                         }
1932                         break;
1933                 }
1934         case GL_SOMETHING:
1935                 match = (val[0] != '\0');
1936                 break;
1937         case GL_UNSET:
1938                 return -1;
1939         }
1940
1941         if (match && (token->key.op == OP_MATCH)) {
1942                 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1943                 return 0;
1944         }
1945         if (!match && (token->key.op == OP_NOMATCH)) {
1946                 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1947                 return 0;
1948         }
1949         dbg(rules->udev, "%s is not true\n", token_str(token->type));
1950         return -1;
1951 }
1952
1953 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1954 {
1955         const char *name;
1956         char nbuf[UTIL_NAME_SIZE];
1957         const char *value;
1958         char vbuf[UTIL_NAME_SIZE];
1959         size_t len;
1960
1961         name = &rules->buf[cur->key.attr_off];
1962         switch (cur->key.attrsubst) {
1963         case SB_FORMAT:
1964                 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1965                 name = nbuf;
1966                 /* fall through */
1967         case SB_NONE:
1968                 value = udev_device_get_sysattr_value(dev, name);
1969                 if (value == NULL)
1970                         return -1;
1971                 break;
1972         case SB_SUBSYS:
1973                 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1974                         return -1;
1975                 value = vbuf;
1976                 break;
1977         default:
1978                 return -1;
1979         }
1980
1981         /* remove trailing whitespace, if not asked to match for it */
1982         len = strlen(value);
1983         if (len > 0 && isspace(value[len-1])) {
1984                 const char *key_value;
1985                 size_t klen;
1986
1987                 key_value = &rules->buf[cur->key.value_off];
1988                 klen = strlen(key_value);
1989                 if (klen > 0 && !isspace(key_value[klen-1])) {
1990                         if (value != vbuf) {
1991                                 util_strscpy(vbuf, sizeof(vbuf), value);
1992                                 value = vbuf;
1993                         }
1994                         while (len > 0 && isspace(vbuf[--len]))
1995                                 vbuf[len] = '\0';
1996                         dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1997                 }
1998         }
1999
2000         return match_key(rules, cur, value);
2001 }
2002
2003 enum escape_type {
2004         ESCAPE_UNSET,
2005         ESCAPE_NONE,
2006         ESCAPE_REPLACE,
2007 };
2008
2009 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
2010 {
2011         struct token *cur;
2012         struct token *rule;
2013         enum escape_type esc = ESCAPE_UNSET;
2014         int can_set_name;
2015
2016         if (rules->tokens == NULL)
2017                 return -1;
2018
2019         can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
2020                          strcmp(udev_device_get_action(event->dev), "change") == 0) &&
2021                         (major(udev_device_get_devnum(event->dev)) > 0 ||
2022                          strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
2023
2024         /* loop through token list, match, run actions or forward to next rule */
2025         cur = &rules->tokens[0];
2026         rule = cur;
2027         while (1) {
2028                 dump_token(rules, cur);
2029                 switch (cur->type) {
2030                 case TK_RULE:
2031                         /* current rule */
2032                         rule = cur;
2033                         /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2034                         if (!can_set_name && rule->rule.flags)
2035                                 goto nomatch;
2036                         esc = ESCAPE_UNSET;
2037                         break;
2038                 case TK_M_ACTION:
2039                         if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2040                                 goto nomatch;
2041                         break;
2042                 case TK_M_DEVPATH:
2043                         if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2044                                 goto nomatch;
2045                         break;
2046                 case TK_M_KERNEL:
2047                         if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2048                                 goto nomatch;
2049                         break;
2050                 case TK_M_DEVLINK:
2051                         {
2052                                 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2053                                 struct udev_list_entry *list_entry;
2054                                 int match = 0;
2055
2056                                 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2057                                         const char *devlink;
2058
2059                                         devlink =  &udev_list_entry_get_name(list_entry)[devlen];
2060                                         if (match_key(rules, cur, devlink) == 0) {
2061                                                 match = 1;
2062                                                 break;
2063                                         }
2064                                 }
2065                                 if (!match)
2066                                         goto nomatch;
2067                                 break;
2068                         }
2069                 case TK_M_NAME:
2070                         if (match_key(rules, cur, event->name) != 0)
2071                                 goto nomatch;
2072                         break;
2073                 case TK_M_ENV:
2074                         {
2075                                 const char *key_name = &rules->buf[cur->key.attr_off];
2076                                 const char *value;
2077
2078                                 value = udev_device_get_property_value(event->dev, key_name);
2079                                 if (value == NULL) {
2080                                         dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2081                                         value = "";
2082                                 }
2083                                 if (match_key(rules, cur, value))
2084                                         goto nomatch;
2085                                 break;
2086                         }
2087                 case TK_M_SUBSYSTEM:
2088                         if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2089                                 goto nomatch;
2090                         break;
2091                 case TK_M_DRIVER:
2092                         if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2093                                 goto nomatch;
2094                         break;
2095                 case TK_M_WAITFOR:
2096                         {
2097                                 char filename[UTIL_PATH_SIZE];
2098                                 int found;
2099
2100                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2101                                 found = (wait_for_file(event->dev, filename, 10) == 0);
2102                                 if (!found && (cur->key.op != OP_NOMATCH))
2103                                         goto nomatch;
2104                                 break;
2105                         }
2106                 case TK_M_ATTR:
2107                         if (match_attr(rules, event->dev, event, cur) != 0)
2108                                 goto nomatch;
2109                         break;
2110                 case TK_M_KERNELS:
2111                 case TK_M_SUBSYSTEMS:
2112                 case TK_M_DRIVERS:
2113                 case TK_M_ATTRS:
2114                         {
2115                                 struct token *next;
2116
2117                                 /* get whole sequence of parent matches */
2118                                 next = cur;
2119                                 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2120                                         next++;
2121
2122                                 /* loop over parents */
2123                                 event->dev_parent = event->dev;
2124                                 while (1) {
2125                                         struct token *key;
2126
2127                                         dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2128                                         /* loop over sequence of parent match keys */
2129                                         for (key = cur; key < next; key++ ) {
2130                                                 dump_token(rules, key);
2131                                                 switch(key->type) {
2132                                                 case TK_M_KERNELS:
2133                                                         if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2134                                                                 goto try_parent;
2135                                                         break;
2136                                                 case TK_M_SUBSYSTEMS:
2137                                                         if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2138                                                                 goto try_parent;
2139                                                         break;
2140                                                 case TK_M_DRIVERS:
2141                                                         if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2142                                                                 goto try_parent;
2143                                                         break;
2144                                                 case TK_M_ATTRS:
2145                                                         if (match_attr(rules, event->dev_parent, event, key) != 0)
2146                                                                 goto try_parent;
2147                                                         break;
2148                                                 default:
2149                                                         goto nomatch;
2150                                                 }
2151                                                 dbg(event->udev, "parent key matched\n");
2152                                         }
2153                                         dbg(event->udev, "all parent keys matched\n");
2154                                         /* all keys matched */
2155                                         break;
2156
2157                                 try_parent:
2158                                         event->dev_parent = udev_device_get_parent(event->dev_parent);
2159                                         if (event->dev_parent == NULL)
2160                                                 goto nomatch;
2161                                 }
2162                                 /* move behind our sequence of parent match keys */
2163                                 cur = next;
2164                                 continue;
2165                         }
2166                 case TK_M_TEST:
2167                         {
2168                                 char filename[UTIL_PATH_SIZE];
2169                                 struct stat statbuf;
2170                                 int match;
2171
2172                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2173                                 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2174                                         if (filename[0] != '/') {
2175                                                 char tmp[UTIL_PATH_SIZE];
2176
2177                                                 util_strscpy(tmp, sizeof(tmp), filename);
2178                                                 util_strscpyl(filename, sizeof(filename),
2179                                                               udev_device_get_syspath(event->dev), "/", tmp, NULL);
2180                                         }
2181                                 }
2182                                 attr_subst_subdir(filename, sizeof(filename));
2183
2184                                 match = (stat(filename, &statbuf) == 0);
2185                                 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2186                                 if (match && cur->key.mode > 0) {
2187                                         match = ((statbuf.st_mode & cur->key.mode) > 0);
2188                                         dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2189                                             match ? "matches" : "does not match", cur->key.mode);
2190                                 }
2191                                 if (match && cur->key.op == OP_NOMATCH)
2192                                         goto nomatch;
2193                                 if (!match && cur->key.op == OP_MATCH)
2194                                         goto nomatch;
2195                                 break;
2196                         }
2197                 case TK_M_PROGRAM:
2198                         {
2199                                 char program[UTIL_PATH_SIZE];
2200                                 char **envp;
2201                                 char result[UTIL_PATH_SIZE];
2202
2203                                 free(event->program_result);
2204                                 event->program_result = NULL;
2205                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2206                                 envp = udev_device_get_properties_envp(event->dev);
2207                                 info(event->udev, "PROGRAM '%s' %s:%u\n",
2208                                      program,
2209                                      &rules->buf[rule->rule.filename_off],
2210                                      rule->rule.filename_line);
2211                                 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL, NULL) != 0) {
2212                                         if (cur->key.op != OP_NOMATCH)
2213                                                 goto nomatch;
2214                                 } else {
2215                                         int count;
2216
2217                                         util_remove_trailing_chars(result, '\n');
2218                                         if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2219                                                 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2220                                                 if (count > 0)
2221                                                         info(event->udev, "%i character(s) replaced\n" , count);
2222                                         }
2223                                         event->program_result = strdup(result);
2224                                         dbg(event->udev, "storing result '%s'\n", event->program_result);
2225                                         if (cur->key.op == OP_NOMATCH)
2226                                                 goto nomatch;
2227                                 }
2228                                 break;
2229                         }
2230                 case TK_M_IMPORT_FILE:
2231                         {
2232                                 char import[UTIL_PATH_SIZE];
2233
2234                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2235                                 if (import_file_into_properties(event->dev, import) != 0)
2236                                         if (cur->key.op != OP_NOMATCH)
2237                                                 goto nomatch;
2238                                 break;
2239                         }
2240                 case TK_M_IMPORT_PROG:
2241                         {
2242                                 char import[UTIL_PATH_SIZE];
2243
2244                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2245                                 info(event->udev, "IMPORT '%s' %s:%u\n",
2246                                      import,
2247                                      &rules->buf[rule->rule.filename_off],
2248                                      rule->rule.filename_line);
2249                                 if (import_program_into_properties(event->dev, import) != 0)
2250                                         if (cur->key.op != OP_NOMATCH)
2251                                                 goto nomatch;
2252                                 break;
2253                         }
2254                 case TK_M_IMPORT_PARENT:
2255                         {
2256                                 char import[UTIL_PATH_SIZE];
2257
2258                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2259                                 if (import_parent_into_properties(event->dev, import) != 0)
2260                                         if (cur->key.op != OP_NOMATCH)
2261                                                 goto nomatch;
2262                                 break;
2263                         }
2264                 case TK_M_RESULT:
2265                         if (match_key(rules, cur, event->program_result) != 0)
2266                                 goto nomatch;
2267                         break;
2268
2269                 case TK_A_IGNORE_DEVICE:
2270                         event->ignore_device = 1;
2271                         return 0;
2272                         break;
2273                 case TK_A_STRING_ESCAPE_NONE:
2274                         esc = ESCAPE_NONE;
2275                         break;
2276                 case TK_A_STRING_ESCAPE_REPLACE:
2277                         esc = ESCAPE_REPLACE;
2278                         break;
2279                 case TK_A_NUM_FAKE_PART:
2280                         if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2281                                 break;
2282                         if (udev_device_get_sysnum(event->dev) != NULL)
2283                                 break;
2284                         udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2285                         break;
2286                 case TK_A_INOTIFY_WATCH:
2287                         event->inotify_watch = cur->key.watch;
2288                         break;
2289                 case TK_A_DEVLINK_PRIO:
2290                         udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2291                         break;
2292                 case TK_A_OWNER:
2293                         {
2294                                 char owner[UTIL_NAME_SIZE];
2295
2296                                 if (event->owner_final)
2297                                         break;
2298                                 if (cur->key.op == OP_ASSIGN_FINAL)
2299                                         event->owner_final = 1;
2300                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2301                                 event->uid = util_lookup_user(event->udev, owner);
2302                                 info(event->udev, "OWNER %u %s:%u\n",
2303                                      event->uid,
2304                                      &rules->buf[rule->rule.filename_off],
2305                                      rule->rule.filename_line);
2306                                 break;
2307                         }
2308                 case TK_A_GROUP:
2309                         {
2310                                 char group[UTIL_NAME_SIZE];
2311
2312                                 if (event->group_final)
2313                                         break;
2314                                 if (cur->key.op == OP_ASSIGN_FINAL)
2315                                         event->group_final = 1;
2316                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2317                                 event->gid = util_lookup_group(event->udev, group);
2318                                 info(event->udev, "GROUP %u %s:%u\n",
2319                                      event->gid,
2320                                      &rules->buf[rule->rule.filename_off],
2321                                      rule->rule.filename_line);
2322                                 break;
2323                         }
2324                 case TK_A_MODE:
2325                         {
2326                                 char mode[UTIL_NAME_SIZE];
2327                                 char *endptr;
2328
2329                                 if (event->mode_final)
2330                                         break;
2331                                 if (cur->key.op == OP_ASSIGN_FINAL)
2332                                         event->mode_final = 1;
2333                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode, sizeof(mode));
2334                                 event->mode = strtol(mode, &endptr, 8);
2335                                 if (endptr[0] != '\0') {
2336                                         err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2337                                         event->mode = 0660;
2338                                 }
2339                                 info(event->udev, "MODE %#o %s:%u\n",
2340                                      event->mode,
2341                                      &rules->buf[rule->rule.filename_off],
2342                                      rule->rule.filename_line);
2343                                 break;
2344                         }
2345                 case TK_A_OWNER_ID:
2346                         if (event->owner_final)
2347                                 break;
2348                         if (cur->key.op == OP_ASSIGN_FINAL)
2349                                 event->owner_final = 1;
2350                         event->uid = cur->key.uid;
2351                         info(event->udev, "OWNER %u %s:%u\n",
2352                              event->uid,
2353                              &rules->buf[rule->rule.filename_off],
2354                              rule->rule.filename_line);
2355                         break;
2356                 case TK_A_GROUP_ID:
2357                         if (event->group_final)
2358                                 break;
2359                         if (cur->key.op == OP_ASSIGN_FINAL)
2360                                 event->group_final = 1;
2361                         event->gid = cur->key.gid;
2362                         info(event->udev, "GROUP %u %s:%u\n",
2363                              event->gid,
2364                              &rules->buf[rule->rule.filename_off],
2365                              rule->rule.filename_line);
2366                         break;
2367                 case TK_A_MODE_ID:
2368                         if (event->mode_final)
2369                                 break;
2370                         if (cur->key.op == OP_ASSIGN_FINAL)
2371                                 event->mode_final = 1;
2372                         event->mode = cur->key.mode;
2373                         info(event->udev, "MODE %#o %s:%u\n",
2374                              event->mode,
2375                              &rules->buf[rule->rule.filename_off],
2376                              rule->rule.filename_line);
2377                         break;
2378                 case TK_A_ENV:
2379                         {
2380                                 const char *name = &rules->buf[cur->key.attr_off];
2381                                 char *value = &rules->buf[cur->key.value_off];
2382
2383                                 if (value[0] != '\0') {
2384                                         char temp_value[UTIL_NAME_SIZE];
2385                                         struct udev_list_entry *entry;
2386
2387                                         udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2388                                         entry = udev_device_add_property(event->dev, name, temp_value);
2389                                         /* store in db, skip private keys */
2390                                         if (name[0] != '.')
2391                                                 udev_list_entry_set_flag(entry, 1);
2392                                 } else {
2393                                         udev_device_add_property(event->dev, name, NULL);
2394                                 }
2395                                 break;
2396                         }
2397                 case TK_A_NAME:
2398                         {
2399                                 const char *name  = &rules->buf[cur->key.value_off];
2400                                 char name_str[UTIL_PATH_SIZE];
2401                                 int count;
2402
2403                                 if (event->name_final)
2404                                         break;
2405                                 if (cur->key.op == OP_ASSIGN_FINAL)
2406                                         event->name_final = 1;
2407                                 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2408                                 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2409                                         count = udev_util_replace_chars(name_str, "/");
2410                                         if (count > 0)
2411                                                 info(event->udev, "%i character(s) replaced\n", count);
2412                                 }
2413                                 free(event->name);
2414                                 event->name = strdup(name_str);
2415                                 info(event->udev, "NAME '%s' %s:%u\n",
2416                                      event->name,
2417                                      &rules->buf[rule->rule.filename_off],
2418                                      rule->rule.filename_line);
2419                                 break;
2420                         }
2421                 case TK_A_DEVLINK:
2422                         {
2423                                 char temp[UTIL_PATH_SIZE];
2424                                 char filename[UTIL_PATH_SIZE];
2425                                 char *pos, *next;
2426                                 int count = 0;
2427
2428                                 if (event->devlink_final)
2429                                         break;
2430                                 if (major(udev_device_get_devnum(event->dev)) == 0)
2431                                         break;
2432                                 if (cur->key.op == OP_ASSIGN_FINAL)
2433                                         event->devlink_final = 1;
2434                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2435                                         udev_device_cleanup_devlinks_list(event->dev);
2436
2437                                 /* allow  multiple symlinks separated by spaces */
2438                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2439                                 if (esc == ESCAPE_UNSET)
2440                                         count = udev_util_replace_chars(temp, "/ ");
2441                                 else if (esc == ESCAPE_REPLACE)
2442                                         count = udev_util_replace_chars(temp, "/");
2443                                 if (count > 0)
2444                                         info(event->udev, "%i character(s) replaced\n" , count);
2445                                 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2446                                 pos = temp;
2447                                 while (isspace(pos[0]))
2448                                         pos++;
2449                                 next = strchr(pos, ' ');
2450                                 while (next != NULL) {
2451                                         next[0] = '\0';
2452                                         info(event->udev, "LINK '%s' %s:%u\n", pos,
2453                                              &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2454                                         util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2455                                         udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2456                                         while (isspace(next[1]))
2457                                                 next++;
2458                                         pos = &next[1];
2459                                         next = strchr(pos, ' ');
2460                                 }
2461                                 if (pos[0] != '\0') {
2462                                         info(event->udev, "LINK '%s' %s:%u\n", pos,
2463                                              &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2464                                         util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2465                                         udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2466                                 }
2467                         }
2468                         break;
2469                 case TK_A_EVENT_TIMEOUT:
2470                         udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2471                         break;
2472                 case TK_A_IGNORE_REMOVE:
2473                         udev_device_set_ignore_remove(event->dev, 1);
2474                         break;
2475                 case TK_A_ATTR:
2476                         {
2477                                 const char *key_name = &rules->buf[cur->key.attr_off];
2478                                 char attr[UTIL_PATH_SIZE];
2479                                 char value[UTIL_NAME_SIZE];
2480                                 FILE *f;
2481
2482                                 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2483                                         util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2484                                 attr_subst_subdir(attr, sizeof(attr));
2485
2486                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2487                                 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2488                                      &rules->buf[rule->rule.filename_off],
2489                                      rule->rule.filename_line);
2490                                 f = fopen(attr, "w");
2491                                 if (f != NULL) {
2492                                         if (fprintf(f, "%s", value) <= 0)
2493                                                 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2494                                         fclose(f);
2495                                 } else {
2496                                         err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2497                                 }
2498                                 break;
2499                         }
2500                 case TK_A_RUN:
2501                         {
2502                                 struct udev_list_entry *list_entry;
2503
2504                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2505                                         udev_list_cleanup_entries(event->udev, &event->run_list);
2506                                 info(event->udev, "RUN '%s' %s:%u\n",
2507                                      &rules->buf[cur->key.value_off],
2508                                      &rules->buf[rule->rule.filename_off],
2509                                      rule->rule.filename_line);
2510                                 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2511                                                                  &rules->buf[cur->key.value_off], NULL, 1, 0);
2512                                 if (cur->key.fail_on_error)
2513                                         udev_list_entry_set_flag(list_entry, 1);
2514                                 break;
2515                         }
2516                 case TK_A_GOTO:
2517                         if (cur->key.rule_goto == 0)
2518                                 break;
2519                         cur = &rules->tokens[cur->key.rule_goto];
2520                         continue;
2521                 case TK_END:
2522                         return 0;
2523
2524                 case TK_M_PARENTS_MIN:
2525                 case TK_M_PARENTS_MAX:
2526                 case TK_M_MAX:
2527                 case TK_UNSET:
2528                         err(rules->udev, "wrong type %u\n", cur->type);
2529                         goto nomatch;
2530                 }
2531
2532                 cur++;
2533                 continue;
2534         nomatch:
2535                 /* fast-forward to next rule */
2536                 cur = rule + rule->rule.token_count;
2537                 dbg(rules->udev, "forward to rule: %u\n",
2538                                  (unsigned int) (cur - rules->tokens));
2539         }
2540 }