udev/udev-rules.c

   1 /*
   2  * Copyright (C) 2003-2010 Kay Sievers <kay.sievers@vrfy.org>
   3  * Copyright (C) 2008 Alan Jenkins <alan-jenkins@tuffmail.co.uk>
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <stddef.h>
  20 #include <limits.h>
  21 #include <stdlib.h>
  22 #include <stdbool.h>
  23 #include <string.h>
  24 #include <stdio.h>
  25 #include <fcntl.h>
  26 #include <ctype.h>
  27 #include <unistd.h>
  28 #include <errno.h>
  29 #include <dirent.h>
  30 #include <fnmatch.h>
  31 #include <time.h>
  32
  33 #include "udev.h"
  34
  35 #define PREALLOC_TOKEN                  2048
  36 #define PREALLOC_STRBUF                 32 * 1024
  37 #define PREALLOC_TRIE                   256
  38
  39 struct uid_gid {
  40         unsigned int name_off;
  41         union {
  42                 uid_t   uid;
  43                 gid_t   gid;
  44         };
  45 };
  46
  47 struct trie_node {
  48         /* this node's first child */
  49         unsigned int child_idx;
  50         /* the next child of our parent node's child list */
  51         unsigned int next_child_idx;
  52         /* this node's last child (shortcut for append) */
  53         unsigned int last_child_idx;
  54         unsigned int value_off;
  55         unsigned short value_len;
  56         unsigned char key;
  57 };
  58
  59 struct udev_rules {
  60         struct udev *udev;
  61         int resolve_names;
  62
  63         /* every key in the rules file becomes a token */
  64         struct token *tokens;
  65         unsigned int token_cur;
  66         unsigned int token_max;
  67
  68         /* all key strings are copied to a single string buffer */
  69         char *buf;
  70         size_t buf_cur;
  71         size_t buf_max;
  72         unsigned int buf_count;
  73
  74         /* during rule parsing, strings are indexed to find duplicates */
  75         struct trie_node *trie_nodes;
  76         unsigned int trie_nodes_cur;
  77         unsigned int trie_nodes_max;
  78
  79         /* during rule parsing, uid/gid lookup results are cached */
  80         struct uid_gid *uids;
  81         unsigned int uids_cur;
  82         unsigned int uids_max;
  83         struct uid_gid *gids;
  84         unsigned int gids_cur;
  85         unsigned int gids_max;
  86 };
  87
  88 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
  89 enum operation_type {
  90         OP_UNSET,
  91
  92         OP_MATCH,
  93         OP_NOMATCH,
  94         OP_MATCH_MAX,
  95
  96         OP_ADD,
  97         OP_ASSIGN,
  98         OP_ASSIGN_FINAL,
  99 };
 100
 101 enum string_glob_type {
 102         GL_UNSET,
 103         GL_PLAIN,                       /* no special chars */
 104         GL_GLOB,                        /* shell globs ?,*,[] */
 105         GL_SPLIT,                       /* multi-value A|B */
 106         GL_SPLIT_GLOB,                  /* multi-value with glob A*|B* */
 107         GL_SOMETHING,                   /* commonly used "?*" */
 108 };
 109
 110 enum string_subst_type {
 111         SB_UNSET,
 112         SB_NONE,
 113         SB_FORMAT,
 114         SB_SUBSYS,
 115 };
 116
 117 /* tokens of a rule are sorted/handled in this order */
 118 enum token_type {
 119         TK_UNSET,
 120         TK_RULE,
 121
 122         TK_M_ACTION,                    /* val */
 123         TK_M_DEVPATH,                   /* val */
 124         TK_M_KERNEL,                    /* val */
 125         TK_M_DEVLINK,                   /* val */
 126         TK_M_NAME,                      /* val */
 127         TK_M_ENV,                       /* val, attr */
 128         TK_M_SUBSYSTEM,                 /* val */
 129         TK_M_DRIVER,                    /* val */
 130         TK_M_WAITFOR,                   /* val */
 131         TK_M_ATTR,                      /* val, attr */
 132
 133         TK_M_PARENTS_MIN,
 134         TK_M_KERNELS,                   /* val */
 135         TK_M_SUBSYSTEMS,                /* val */
 136         TK_M_DRIVERS,                   /* val */
 137         TK_M_ATTRS,                     /* val, attr */
 138         TK_M_PARENTS_MAX,
 139
 140         TK_M_TEST,                      /* val, mode_t */
 141         TK_M_PROGRAM,                   /* val */
 142         TK_M_IMPORT_FILE,               /* val */
 143         TK_M_IMPORT_PROG,               /* val */
 144         TK_M_IMPORT_DB,                 /* val */
 145         TK_M_IMPORT_PARENT,             /* val */
 146         TK_M_RESULT,                    /* val */
 147         TK_M_MAX,
 148
 149         TK_A_STRING_ESCAPE_NONE,
 150         TK_A_STRING_ESCAPE_REPLACE,
 151         TK_A_INOTIFY_WATCH,             /* int */
 152         TK_A_NUM_FAKE_PART,             /* int */
 153         TK_A_DEVLINK_PRIO,              /* int */
 154         TK_A_OWNER,                     /* val */
 155         TK_A_GROUP,                     /* val */
 156         TK_A_MODE,                      /* val */
 157         TK_A_OWNER_ID,                  /* uid_t */
 158         TK_A_GROUP_ID,                  /* gid_t */
 159         TK_A_MODE_ID,                   /* mode_t */
 160         TK_A_ENV,                       /* val, attr */
 161         TK_A_NAME,                      /* val */
 162         TK_A_DEVLINK,                   /* val */
 163         TK_A_EVENT_TIMEOUT,             /* int */
 164         TK_A_IGNORE_REMOVE,
 165         TK_A_ATTR,                      /* val, attr */
 166         TK_A_RUN,                       /* val, bool */
 167         TK_A_GOTO,                      /* size_t */
 168
 169         TK_END,
 170 };
 171
 172 /* we try to pack stuff in a way that we take only 12 bytes per token */
 173 struct token {
 174         union {
 175                 unsigned char type;             /* same as in rule and key */
 176                 struct {
 177                         enum token_type type:8;
 178                         unsigned int flags:8;
 179                         unsigned short token_count;
 180                         unsigned int label_off;
 181                         unsigned short filename_off;
 182                         unsigned short filename_line;
 183                 } rule;
 184                 struct {
 185                         enum token_type type:8;
 186                         enum operation_type op:8;
 187                         enum string_glob_type glob:8;
 188                         enum string_subst_type subst:4;
 189                         enum string_subst_type attrsubst:4;
 190                         unsigned int value_off;
 191                         union {
 192                                 unsigned int attr_off;
 193                                 int devlink_unique;
 194                                 int fail_on_error;
 195                                 unsigned int rule_goto;
 196                                 mode_t  mode;
 197                                 uid_t uid;
 198                                 gid_t gid;
 199                                 int num_fake_part;
 200                                 int devlink_prio;
 201                                 int event_timeout;
 202                                 int watch;
 203                         };
 204                 } key;
 205         };
 206 };
 207
 208 #define MAX_TK          64
 209 struct rule_tmp {
 210         struct udev_rules *rules;
 211         struct token rule;
 212         struct token token[MAX_TK];
 213         unsigned int token_cur;
 214 };
 215
 216 #ifdef ENABLE_DEBUG
 217 static const char *operation_str(enum operation_type type)
 218 {
 219         static const char *operation_strs[] = {
 220                 [OP_UNSET] =            "UNSET",
 221                 [OP_MATCH] =            "match",
 222                 [OP_NOMATCH] =          "nomatch",
 223                 [OP_MATCH_MAX] =        "MATCH_MAX",
 224
 225                 [OP_ADD] =              "add",
 226                 [OP_ASSIGN] =           "assign",
 227                 [OP_ASSIGN_FINAL] =     "assign-final",
 228 }       ;
 229
 230         return operation_strs[type];
 231 }
 232
 233 static const char *string_glob_str(enum string_glob_type type)
 234 {
 235         static const char *string_glob_strs[] = {
 236                 [GL_UNSET] =            "UNSET",
 237                 [GL_PLAIN] =            "plain",
 238                 [GL_GLOB] =             "glob",
 239                 [GL_SPLIT] =            "split",
 240                 [GL_SPLIT_GLOB] =       "split-glob",
 241                 [GL_SOMETHING] =        "split-glob",
 242         };
 243
 244         return string_glob_strs[type];
 245 }
 246
 247 static const char *token_str(enum token_type type)
 248 {
 249         static const char *token_strs[] = {
 250                 [TK_UNSET] =                    "UNSET",
 251                 [TK_RULE] =                     "RULE",
 252
 253                 [TK_M_ACTION] =                 "M ACTION",
 254                 [TK_M_DEVPATH] =                "M DEVPATH",
 255                 [TK_M_KERNEL] =                 "M KERNEL",
 256                 [TK_M_DEVLINK] =                "M DEVLINK",
 257                 [TK_M_NAME] =                   "M NAME",
 258                 [TK_M_ENV] =                    "M ENV",
 259                 [TK_M_SUBSYSTEM] =              "M SUBSYSTEM",
 260                 [TK_M_DRIVER] =                 "M DRIVER",
 261                 [TK_M_WAITFOR] =                "M WAITFOR",
 262                 [TK_M_ATTR] =                   "M ATTR",
 263
 264                 [TK_M_PARENTS_MIN] =            "M PARENTS_MIN",
 265                 [TK_M_KERNELS] =                "M KERNELS",
 266                 [TK_M_SUBSYSTEMS] =             "M SUBSYSTEMS",
 267                 [TK_M_DRIVERS] =                "M DRIVERS",
 268                 [TK_M_ATTRS] =                  "M ATTRS",
 269                 [TK_M_PARENTS_MAX] =            "M PARENTS_MAX",
 270
 271                 [TK_M_TEST] =                   "M TEST",
 272                 [TK_M_PROGRAM] =                "M PROGRAM",
 273                 [TK_M_IMPORT_FILE] =            "M IMPORT_FILE",
 274                 [TK_M_IMPORT_PROG] =            "M IMPORT_PROG",
 275                 [TK_M_IMPORT_DB] =              "M IMPORT_DB",
 276                 [TK_M_IMPORT_PARENT] =          "M IMPORT_PARENT",
 277                 [TK_M_RESULT] =                 "M RESULT",
 278                 [TK_M_MAX] =                    "M MAX",
 279
 280                 [TK_A_STRING_ESCAPE_NONE] =     "A STRING_ESCAPE_NONE",
 281                 [TK_A_STRING_ESCAPE_REPLACE] =  "A STRING_ESCAPE_REPLACE",
 282                 [TK_A_INOTIFY_WATCH] =          "A INOTIFY_WATCH",
 283                 [TK_A_NUM_FAKE_PART] =          "A NUM_FAKE_PART",
 284                 [TK_A_DEVLINK_PRIO] =           "A DEVLINK_PRIO",
 285                 [TK_A_OWNER] =                  "A OWNER",
 286                 [TK_A_GROUP] =                  "A GROUP",
 287                 [TK_A_MODE] =                   "A MODE",
 288                 [TK_A_OWNER_ID] =               "A OWNER_ID",
 289                 [TK_A_GROUP_ID] =               "A GROUP_ID",
 290                 [TK_A_MODE_ID] =                "A MODE_ID",
 291                 [TK_A_ENV] =                    "A ENV",
 292                 [TK_A_NAME] =                   "A NAME",
 293                 [TK_A_DEVLINK] =                "A DEVLINK",
 294                 [TK_A_EVENT_TIMEOUT] =          "A EVENT_TIMEOUT",
 295                 [TK_A_IGNORE_REMOVE] =          "A IGNORE_REMOVE",
 296                 [TK_A_ATTR] =                   "A ATTR",
 297                 [TK_A_RUN] =                    "A RUN",
 298                 [TK_A_GOTO] =                   "A GOTO",
 299
 300                 [TK_END] =                      "END",
 301         };
 302
 303         return token_strs[type];
 304 }
 305
 306 static void dump_token(struct udev_rules *rules, struct token *token)
 307 {
 308         enum token_type type = token->type;
 309         enum operation_type op = token->key.op;
 310         enum string_glob_type glob = token->key.glob;
 311         const char *value = &rules->buf[token->key.value_off];
 312         const char *attr = &rules->buf[token->key.attr_off];
 313
 314         switch (type) {
 315         case TK_RULE:
 316                 {
 317                         const char *tks_ptr = (char *)rules->tokens;
 318                         const char *tk_ptr = (char *)token;
 319                         unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
 320
 321                         dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
 322                             &rules->buf[token->rule.filename_off], token->rule.filename_line,
 323                             idx, token->rule.token_count,
 324                             &rules->buf[token->rule.label_off],
 325                             token->rule.flags);
 326                         break;
 327                 }
 328         case TK_M_ACTION:
 329         case TK_M_DEVPATH:
 330         case TK_M_KERNEL:
 331         case TK_M_SUBSYSTEM:
 332         case TK_M_DRIVER:
 333         case TK_M_WAITFOR:
 334         case TK_M_DEVLINK:
 335         case TK_M_NAME:
 336         case TK_M_KERNELS:
 337         case TK_M_SUBSYSTEMS:
 338         case TK_M_DRIVERS:
 339         case TK_M_PROGRAM:
 340         case TK_M_IMPORT_FILE:
 341         case TK_M_IMPORT_PROG:
 342         case TK_M_IMPORT_DB:
 343         case TK_M_IMPORT_PARENT:
 344         case TK_M_RESULT:
 345         case TK_A_NAME:
 346         case TK_A_DEVLINK:
 347         case TK_A_OWNER:
 348         case TK_A_GROUP:
 349         case TK_A_MODE:
 350         case TK_A_RUN:
 351                 dbg(rules->udev, "%s %s '%s'(%s)\n",
 352                     token_str(type), operation_str(op), value, string_glob_str(glob));
 353                 break;
 354         case TK_M_ATTR:
 355         case TK_M_ATTRS:
 356         case TK_M_ENV:
 357         case TK_A_ATTR:
 358         case TK_A_ENV:
 359                 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
 360                     token_str(type), operation_str(op), attr, value, string_glob_str(glob));
 361                 break;
 362         case TK_A_STRING_ESCAPE_NONE:
 363         case TK_A_STRING_ESCAPE_REPLACE:
 364         case TK_A_IGNORE_REMOVE:
 365                 dbg(rules->udev, "%s\n", token_str(type));
 366                 break;
 367         case TK_M_TEST:
 368                 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
 369                     token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
 370                 break;
 371         case TK_A_INOTIFY_WATCH:
 372                 dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch);
 373                 break;
 374         case TK_A_NUM_FAKE_PART:
 375                 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
 376                 break;
 377         case TK_A_DEVLINK_PRIO:
 378                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
 379                 break;
 380         case TK_A_OWNER_ID:
 381                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
 382                 break;
 383         case TK_A_GROUP_ID:
 384                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
 385                 break;
 386         case TK_A_MODE_ID:
 387                 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
 388                 break;
 389         case TK_A_EVENT_TIMEOUT:
 390                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
 391                 break;
 392         case TK_A_GOTO:
 393                 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
 394                 break;
 395         case TK_END:
 396                 dbg(rules->udev, "* %s\n", token_str(type));
 397                 break;
 398         case TK_M_PARENTS_MIN:
 399         case TK_M_PARENTS_MAX:
 400         case TK_M_MAX:
 401         case TK_UNSET:
 402                 dbg(rules->udev, "unknown type %u\n", type);
 403                 break;
 404         }
 405 }
 406
 407 static void dump_rules(struct udev_rules *rules)
 408 {
 409         unsigned int i;
 410
 411         dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
 412             rules->token_cur,
 413             rules->token_cur * sizeof(struct token),
 414             rules->buf_count,
 415             rules->buf_cur);
 416         for(i = 0; i < rules->token_cur; i++)
 417                 dump_token(rules, &rules->tokens[i]);
 418 }
 419 #else
 420 static inline const char *operation_str(enum operation_type type) { return NULL; }
 421 static inline const char *token_str(enum token_type type) { return NULL; }
 422 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
 423 static inline void dump_rules(struct udev_rules *rules) {}
 424 #endif /* ENABLE_DEBUG */
 425
 426 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
 427 {
 428         int off;
 429
 430         /* grow buffer if needed */
 431         if (rules->buf_cur + bytes+1 >= rules->buf_max) {
 432                 char *buf;
 433                 unsigned int add;
 434
 435                 /* double the buffer size */
 436                 add = rules->buf_max;
 437                 if (add < bytes * 8)
 438                         add = bytes * 8;
 439
 440                 buf = realloc(rules->buf, rules->buf_max + add);
 441                 if (buf == NULL)
 442                         return -1;
 443                 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
 444                 rules->buf = buf;
 445                 rules->buf_max += add;
 446         }
 447         off = rules->buf_cur;
 448         memcpy(&rules->buf[rules->buf_cur], str, bytes);
 449         rules->buf_cur += bytes;
 450         rules->buf_count++;
 451         return off;
 452 }
 453
 454 static int add_string(struct udev_rules *rules, const char *str)
 455 {
 456         unsigned int node_idx;
 457         struct trie_node *new_node;
 458         unsigned int new_node_idx;
 459         unsigned char key;
 460         unsigned short len;
 461         unsigned int depth;
 462         unsigned int off;
 463         struct trie_node *parent;
 464
 465         /* walk trie, start from last character of str to find matching tails */
 466         len = strlen(str);
 467         key = str[len-1];
 468         node_idx = 0;
 469         for (depth = 0; depth <= len; depth++) {
 470                 struct trie_node *node;
 471                 unsigned int child_idx;
 472
 473                 node = &rules->trie_nodes[node_idx];
 474                 off = node->value_off + node->value_len - len;
 475
 476                 /* match against current node */
 477                 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
 478                         return off;
 479
 480                 /* lookup child node */
 481                 key = str[len - 1 - depth];
 482                 child_idx = node->child_idx;
 483                 while (child_idx > 0) {
 484                         struct trie_node *child;
 485
 486                         child = &rules->trie_nodes[child_idx];
 487                         if (child->key == key)
 488                                 break;
 489                         child_idx = child->next_child_idx;
 490                 }
 491                 if (child_idx == 0)
 492                         break;
 493                 node_idx = child_idx;
 494         }
 495
 496         /* string not found, add it */
 497         off = add_new_string(rules, str, len + 1);
 498
 499         /* grow trie nodes if needed */
 500         if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
 501                 struct trie_node *nodes;
 502                 unsigned int add;
 503
 504                 /* double the buffer size */
 505                 add = rules->trie_nodes_max;
 506                 if (add < 8)
 507                         add = 8;
 508
 509                 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
 510                 if (nodes == NULL)
 511                         return -1;
 512                 dbg(rules->udev, "extend trie nodes from %u to %u\n",
 513                     rules->trie_nodes_max, rules->trie_nodes_max + add);
 514                 rules->trie_nodes = nodes;
 515                 rules->trie_nodes_max += add;
 516         }
 517
 518         /* get a new node */
 519         new_node_idx = rules->trie_nodes_cur;
 520         rules->trie_nodes_cur++;
 521         new_node = &rules->trie_nodes[new_node_idx];
 522         memset(new_node, 0x00, sizeof(struct trie_node));
 523         new_node->value_off = off;
 524         new_node->value_len = len;
 525         new_node->key = key;
 526
 527         /* join the parent's child list */
 528         parent = &rules->trie_nodes[node_idx];
 529         if (parent->child_idx == 0) {
 530                 parent->child_idx = new_node_idx;
 531         } else {
 532                 struct trie_node *last_child;
 533
 534                 last_child = &rules->trie_nodes[parent->last_child_idx];
 535                 last_child->next_child_idx = new_node_idx;
 536         }
 537         parent->last_child_idx = new_node_idx;
 538         return off;
 539 }
 540
 541 static int add_token(struct udev_rules *rules, struct token *token)
 542 {
 543         /* grow buffer if needed */
 544         if (rules->token_cur+1 >= rules->token_max) {
 545                 struct token *tokens;
 546                 unsigned int add;
 547
 548                 /* double the buffer size */
 549                 add = rules->token_max;
 550                 if (add < 8)
 551                         add = 8;
 552
 553                 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
 554                 if (tokens == NULL)
 555                         return -1;
 556                 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
 557                 rules->tokens = tokens;
 558                 rules->token_max += add;
 559         }
 560         memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
 561         rules->token_cur++;
 562         return 0;
 563 }
 564
 565 static uid_t add_uid(struct udev_rules *rules, const char *owner)
 566 {
 567         unsigned int i;
 568         uid_t uid;
 569         unsigned int off;
 570
 571         /* lookup, if we know it already */
 572         for (i = 0; i < rules->uids_cur; i++) {
 573                 off = rules->uids[i].name_off;
 574                 if (strcmp(&rules->buf[off], owner) == 0) {
 575                         uid = rules->uids[i].uid;
 576                         dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
 577                         return uid;
 578                 }
 579         }
 580         uid = util_lookup_user(rules->udev, owner);
 581
 582         /* grow buffer if needed */
 583         if (rules->uids_cur+1 >= rules->uids_max) {
 584                 struct uid_gid *uids;
 585                 unsigned int add;
 586
 587                 /* double the buffer size */
 588                 add = rules->uids_max;
 589                 if (add < 1)
 590                         add = 8;
 591
 592                 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
 593                 if (uids == NULL)
 594                         return uid;
 595                 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
 596                 rules->uids = uids;
 597                 rules->uids_max += add;
 598         }
 599         rules->uids[rules->uids_cur].uid = uid;
 600         off = add_string(rules, owner);
 601         if (off <= 0)
 602                 return uid;
 603         rules->uids[rules->uids_cur].name_off = off;
 604         rules->uids_cur++;
 605         return uid;
 606 }
 607
 608 static gid_t add_gid(struct udev_rules *rules, const char *group)
 609 {
 610         unsigned int i;
 611         gid_t gid;
 612         unsigned int off;
 613
 614         /* lookup, if we know it already */
 615         for (i = 0; i < rules->gids_cur; i++) {
 616                 off = rules->gids[i].name_off;
 617                 if (strcmp(&rules->buf[off], group) == 0) {
 618                         gid = rules->gids[i].gid;
 619                         dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
 620                         return gid;
 621                 }
 622         }
 623         gid = util_lookup_group(rules->udev, group);
 624
 625         /* grow buffer if needed */
 626         if (rules->gids_cur+1 >= rules->gids_max) {
 627                 struct uid_gid *gids;
 628                 unsigned int add;
 629
 630                 /* double the buffer size */
 631                 add = rules->gids_max;
 632                 if (add < 1)
 633                         add = 8;
 634
 635                 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
 636                 if (gids == NULL)
 637                         return gid;
 638                 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
 639                 rules->gids = gids;
 640                 rules->gids_max += add;
 641         }
 642         rules->gids[rules->gids_cur].gid = gid;
 643         off = add_string(rules, group);
 644         if (off <= 0)
 645                 return gid;
 646         rules->gids[rules->gids_cur].name_off = off;
 647         rules->gids_cur++;
 648         return gid;
 649 }
 650
 651 static int import_property_from_string(struct udev_device *dev, char *line)
 652 {
 653         struct udev *udev = udev_device_get_udev(dev);
 654         char *key;
 655         char *val;
 656         size_t len;
 657
 658         /* find key */
 659         key = line;
 660         while (isspace(key[0]))
 661                 key++;
 662
 663         /* comment or empty line */
 664         if (key[0] == '#' || key[0] == '\0')
 665                 return -1;
 666
 667         /* split key/value */
 668         val = strchr(key, '=');
 669         if (val == NULL)
 670                 return -1;
 671         val[0] = '\0';
 672         val++;
 673
 674         /* find value */
 675         while (isspace(val[0]))
 676                 val++;
 677
 678         /* terminate key */
 679         len = strlen(key);
 680         if (len == 0)
 681                 return -1;
 682         while (isspace(key[len-1]))
 683                 len--;
 684         key[len] = '\0';
 685
 686         /* terminate value */
 687         len = strlen(val);
 688         if (len == 0)
 689                 return -1;
 690         while (isspace(val[len-1]))
 691                 len--;
 692         val[len] = '\0';
 693
 694         if (len == 0)
 695                 return -1;
 696
 697         /* unquote */
 698         if (val[0] == '"' || val[0] == '\'') {
 699                 if (val[len-1] != val[0]) {
 700                         info(udev, "inconsistent quoting: '%s', skip\n", line);
 701                         return -1;
 702                 }
 703                 val[len-1] = '\0';
 704                 val++;
 705         }
 706
 707         dbg(udev, "adding '%s'='%s'\n", key, val);
 708
 709         /* handle device, renamed by external tool, returning new path */
 710         if (strcmp(key, "DEVPATH") == 0) {
 711                 char syspath[UTIL_PATH_SIZE];
 712
 713                 info(udev, "updating devpath from '%s' to '%s'\n",
 714                      udev_device_get_devpath(dev), val);
 715                 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL);
 716                 udev_device_set_syspath(dev, syspath);
 717         } else {
 718                 struct udev_list_entry *entry;
 719
 720                 entry = udev_device_add_property(dev, key, val);
 721                 /* store in db, skip private keys */
 722                 if (key[0] != '.')
 723                         udev_list_entry_set_flags(entry, 1);
 724         }
 725         return 0;
 726 }
 727
 728 static int import_file_into_properties(struct udev_device *dev, const char *filename)
 729 {
 730         FILE *f;
 731         char line[UTIL_LINE_SIZE];
 732
 733         f = fopen(filename, "r");
 734         if (f == NULL)
 735                 return -1;
 736         while (fgets(line, sizeof(line), f) != NULL)
 737                 import_property_from_string(dev, line);
 738         fclose(f);
 739         return 0;
 740 }
 741
 742 static int import_program_into_properties(struct udev_device *dev, const char *program)
 743 {
 744         struct udev *udev = udev_device_get_udev(dev);
 745         char **envp;
 746         char result[4096];
 747         size_t reslen;
 748         char *line;
 749
 750         envp = udev_device_get_properties_envp(dev);
 751         if (util_run_program(udev, program, envp, result, sizeof(result), &reslen, NULL) != 0)
 752                 return -1;
 753
 754         line = result;
 755         while (line != NULL) {
 756                 char *pos;
 757
 758                 pos = strchr(line, '\n');
 759                 if (pos != NULL) {
 760                         pos[0] = '\0';
 761                         pos = &pos[1];
 762                 }
 763                 import_property_from_string(dev, line);
 764                 line = pos;
 765         }
 766         return 0;
 767 }
 768
 769 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
 770 {
 771         struct udev *udev = udev_device_get_udev(dev);
 772         struct udev_device *dev_parent;
 773         struct udev_list_entry *list_entry;
 774
 775         dev_parent = udev_device_get_parent(dev);
 776         if (dev_parent == NULL)
 777                 return -1;
 778
 779         dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
 780         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
 781                 const char *key = udev_list_entry_get_name(list_entry);
 782                 const char *val = udev_list_entry_get_value(list_entry);
 783
 784                 if (fnmatch(filter, key, 0) == 0) {
 785                         struct udev_list_entry *entry;
 786
 787                         dbg(udev, "import key '%s=%s'\n", key, val);
 788                         entry = udev_device_add_property(dev, key, val);
 789                         /* store in db, skip private keys */
 790                         if (key[0] != '.')
 791                                 udev_list_entry_set_flags(entry, 1);
 792                 }
 793         }
 794         return 0;
 795 }
 796
 797 #define WAIT_LOOP_PER_SECOND            50
 798 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
 799 {
 800         struct udev *udev = udev_device_get_udev(dev);
 801         char filepath[UTIL_PATH_SIZE];
 802         char devicepath[UTIL_PATH_SIZE];
 803         struct stat stats;
 804         int loop = timeout * WAIT_LOOP_PER_SECOND;
 805
 806         /* a relative path is a device attribute */
 807         devicepath[0] = '\0';
 808         if (file[0] != '/') {
 809                 util_strscpyl(devicepath, sizeof(devicepath),
 810                               udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL);
 811                 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
 812                 file = filepath;
 813         }
 814
 815         dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
 816         while (--loop) {
 817                 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
 818
 819                 /* lookup file */
 820                 if (stat(file, &stats) == 0) {
 821                         info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
 822                         return 0;
 823                 }
 824                 /* make sure, the device did not disappear in the meantime */
 825                 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
 826                         info(udev, "device disappeared while waiting for '%s'\n", file);
 827                         return -2;
 828                 }
 829                 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
 830                 nanosleep(&duration, NULL);
 831         }
 832         info(udev, "waiting for '%s' failed\n", file);
 833         return -1;
 834 }
 835
 836 static int attr_subst_subdir(char *attr, size_t len)
 837 {
 838         int found = 0;
 839
 840         if (strstr(attr, "/*/")) {
 841                 char *pos;
 842                 char dirname[UTIL_PATH_SIZE];
 843                 const char *tail;
 844                 DIR *dir;
 845
 846                 util_strscpy(dirname, sizeof(dirname), attr);
 847                 pos = strstr(dirname, "/*/");
 848                 if (pos == NULL)
 849                         return -1;
 850                 pos[0] = '\0';
 851                 tail = &pos[2];
 852                 dir = opendir(dirname);
 853                 if (dir != NULL) {
 854                         struct dirent *dent;
 855
 856                         for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 857                                 struct stat stats;
 858
 859                                 if (dent->d_name[0] == '.')
 860                                         continue;
 861                                 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
 862                                 if (stat(attr, &stats) == 0) {
 863                                         found = 1;
 864                                         break;
 865                                 }
 866                         }
 867                         closedir(dir);
 868                 }
 869         }
 870
 871         return found;
 872 }
 873
 874 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
 875 {
 876         char *linepos;
 877         char *temp;
 878
 879         linepos = *line;
 880         if (linepos == NULL || linepos[0] == '\0')
 881                 return -1;
 882
 883         /* skip whitespace */
 884         while (isspace(linepos[0]) || linepos[0] == ',')
 885                 linepos++;
 886
 887         /* get the key */
 888         if (linepos[0] == '\0')
 889                 return -1;
 890         *key = linepos;
 891
 892         while (1) {
 893                 linepos++;
 894                 if (linepos[0] == '\0')
 895                         return -1;
 896                 if (isspace(linepos[0]))
 897                         break;
 898                 if (linepos[0] == '=')
 899                         break;
 900                 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
 901                         if (linepos[1] == '=')
 902                                 break;
 903         }
 904
 905         /* remember end of key */
 906         temp = linepos;
 907
 908         /* skip whitespace after key */
 909         while (isspace(linepos[0]))
 910                 linepos++;
 911         if (linepos[0] == '\0')
 912                 return -1;
 913
 914         /* get operation type */
 915         if (linepos[0] == '=' && linepos[1] == '=') {
 916                 *op = OP_MATCH;
 917                 linepos += 2;
 918         } else if (linepos[0] == '!' && linepos[1] == '=') {
 919                 *op = OP_NOMATCH;
 920                 linepos += 2;
 921         } else if (linepos[0] == '+' && linepos[1] == '=') {
 922                 *op = OP_ADD;
 923                 linepos += 2;
 924         } else if (linepos[0] == '=') {
 925                 *op = OP_ASSIGN;
 926                 linepos++;
 927         } else if (linepos[0] == ':' && linepos[1] == '=') {
 928                 *op = OP_ASSIGN_FINAL;
 929                 linepos += 2;
 930         } else
 931                 return -1;
 932
 933         /* terminate key */
 934         temp[0] = '\0';
 935
 936         /* skip whitespace after operator */
 937         while (isspace(linepos[0]))
 938                 linepos++;
 939         if (linepos[0] == '\0')
 940                 return -1;
 941
 942         /* get the value */
 943         if (linepos[0] == '"')
 944                 linepos++;
 945         else
 946                 return -1;
 947         *value = linepos;
 948
 949         /* terminate */
 950         temp = strchr(linepos, '"');
 951         if (!temp)
 952                 return -1;
 953         temp[0] = '\0';
 954         temp++;
 955         dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
 956
 957         /* move line to next key */
 958         *line = temp;
 959         return 0;
 960 }
 961
 962 /* extract possible KEY{attr} */
 963 static char *get_key_attribute(struct udev *udev, char *str)
 964 {
 965         char *pos;
 966         char *attr;
 967
 968         attr = strchr(str, '{');
 969         if (attr != NULL) {
 970                 attr++;
 971                 pos = strchr(attr, '}');
 972                 if (pos == NULL) {
 973                         err(udev, "missing closing brace for format\n");
 974                         return NULL;
 975                 }
 976                 pos[0] = '\0';
 977                 dbg(udev, "attribute='%s'\n", attr);
 978                 return attr;
 979         }
 980         return NULL;
 981 }
 982
 983 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
 984                         enum operation_type op,
 985                         const char *value, const void *data)
 986 {
 987         struct token *token = &rule_tmp->token[rule_tmp->token_cur];
 988         const char *attr = NULL;
 989
 990         memset(token, 0x00, sizeof(struct token));
 991
 992         switch (type) {
 993         case TK_M_ACTION:
 994         case TK_M_DEVPATH:
 995         case TK_M_KERNEL:
 996         case TK_M_SUBSYSTEM:
 997         case TK_M_DRIVER:
 998         case TK_M_WAITFOR:
 999         case TK_M_DEVLINK:
1000         case TK_M_NAME:
1001         case TK_M_KERNELS:
1002         case TK_M_SUBSYSTEMS:
1003         case TK_M_DRIVERS:
1004         case TK_M_PROGRAM:
1005         case TK_M_IMPORT_FILE:
1006         case TK_M_IMPORT_PROG:
1007         case TK_M_IMPORT_DB:
1008         case TK_M_IMPORT_PARENT:
1009         case TK_M_RESULT:
1010         case TK_A_OWNER:
1011         case TK_A_GROUP:
1012         case TK_A_MODE:
1013         case TK_A_NAME:
1014         case TK_A_GOTO:
1015                 token->key.value_off = add_string(rule_tmp->rules, value);
1016                 break;
1017         case TK_M_ENV:
1018         case TK_M_ATTR:
1019         case TK_M_ATTRS:
1020         case TK_A_ATTR:
1021         case TK_A_ENV:
1022                 attr = data;
1023                 token->key.value_off = add_string(rule_tmp->rules, value);
1024                 token->key.attr_off = add_string(rule_tmp->rules, attr);
1025                 break;
1026         case TK_A_DEVLINK:
1027                 token->key.value_off = add_string(rule_tmp->rules, value);
1028                 token->key.devlink_unique = *(int *)data;
1029                 break;
1030         case TK_M_TEST:
1031                 token->key.value_off = add_string(rule_tmp->rules, value);
1032                 if (data != NULL)
1033                         token->key.mode = *(mode_t *)data;
1034                 break;
1035         case TK_A_STRING_ESCAPE_NONE:
1036         case TK_A_STRING_ESCAPE_REPLACE:
1037         case TK_A_IGNORE_REMOVE:
1038                 break;
1039         case TK_A_RUN:
1040                 token->key.value_off = add_string(rule_tmp->rules, value);
1041                 token->key.fail_on_error = *(int *)data;
1042                 break;
1043         case TK_A_INOTIFY_WATCH:
1044         case TK_A_NUM_FAKE_PART:
1045         case TK_A_DEVLINK_PRIO:
1046                 token->key.devlink_prio = *(int *)data;
1047                 break;
1048         case TK_A_OWNER_ID:
1049                 token->key.uid = *(uid_t *)data;
1050                 break;
1051         case TK_A_GROUP_ID:
1052                 token->key.gid = *(gid_t *)data;
1053                 break;
1054         case TK_A_MODE_ID:
1055                 token->key.mode = *(mode_t *)data;
1056                 break;
1057         case TK_A_EVENT_TIMEOUT:
1058                 token->key.event_timeout = *(int *)data;
1059                 break;
1060         case TK_RULE:
1061         case TK_M_PARENTS_MIN:
1062         case TK_M_PARENTS_MAX:
1063         case TK_M_MAX:
1064         case TK_END:
1065         case TK_UNSET:
1066                 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1067                 return -1;
1068         }
1069
1070         if (value != NULL && type < TK_M_MAX) {
1071                 /* check if we need to split or call fnmatch() while matching rules */
1072                 enum string_glob_type glob;
1073                 int has_split;
1074                 int has_glob;
1075
1076                 has_split = (strchr(value, '|') != NULL);
1077                 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1078                 if (has_split && has_glob) {
1079                         glob = GL_SPLIT_GLOB;
1080                 } else if (has_split) {
1081                         glob = GL_SPLIT;
1082                 } else if (has_glob) {
1083                         if (strcmp(value, "?*") == 0)
1084                                 glob = GL_SOMETHING;
1085                         else
1086                                 glob = GL_GLOB;
1087                 } else {
1088                         glob = GL_PLAIN;
1089                 }
1090                 token->key.glob = glob;
1091         }
1092
1093         if (value != NULL && type > TK_M_MAX) {
1094                 /* check if assigned value has substitution chars */
1095                 if (value[0] == '[')
1096                         token->key.subst = SB_SUBSYS;
1097                 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1098                         token->key.subst = SB_FORMAT;
1099                 else
1100                         token->key.subst = SB_NONE;
1101         }
1102
1103         if (attr != NULL) {
1104                 /* check if property/attribut name has substitution chars */
1105                 if (attr[0] == '[')
1106                         token->key.attrsubst = SB_SUBSYS;
1107                 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1108                         token->key.attrsubst = SB_FORMAT;
1109                 else
1110                         token->key.attrsubst = SB_NONE;
1111         }
1112
1113         token->key.type = type;
1114         token->key.op = op;
1115         rule_tmp->token_cur++;
1116         if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1117                 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1118                 return -1;
1119         }
1120         return 0;
1121 }
1122
1123 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1124 {
1125         unsigned int i;
1126         unsigned int start = 0;
1127         unsigned int end = rule_tmp->token_cur;
1128
1129         for (i = 0; i < rule_tmp->token_cur; i++) {
1130                 enum token_type next_val = TK_UNSET;
1131                 unsigned int next_idx = 0;
1132                 unsigned int j;
1133
1134                 /* find smallest value */
1135                 for (j = start; j < end; j++) {
1136                         if (rule_tmp->token[j].type == TK_UNSET)
1137                                 continue;
1138                         if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1139                                 next_val = rule_tmp->token[j].type;
1140                                 next_idx = j;
1141                         }
1142                 }
1143
1144                 /* add token and mark done */
1145                 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1146                         return -1;
1147                 rule_tmp->token[next_idx].type = TK_UNSET;
1148
1149                 /* shrink range */
1150                 if (next_idx == start)
1151                         start++;
1152                 if (next_idx+1 == end)
1153                         end--;
1154         }
1155         return 0;
1156 }
1157
1158 static int add_rule(struct udev_rules *rules, char *line,
1159                     const char *filename, unsigned int filename_off, unsigned int lineno)
1160 {
1161         char *linepos;
1162         char *attr;
1163         struct rule_tmp rule_tmp;
1164         bool bus_warn = false;
1165         bool sysfs_warn = false;
1166         bool id_warn = false;
1167
1168         memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1169         rule_tmp.rules = rules;
1170         rule_tmp.rule.type = TK_RULE;
1171         rule_tmp.rule.rule.filename_off = filename_off;
1172         rule_tmp.rule.rule.filename_line = lineno;
1173
1174         linepos = line;
1175         while (1) {
1176                 char *key;
1177                 char *value;
1178                 enum operation_type op;
1179
1180                 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1181                         break;
1182
1183                 if (strcmp(key, "ACTION") == 0) {
1184                         if (op > OP_MATCH_MAX) {
1185                                 err(rules->udev, "invalid ACTION operation\n");
1186                                 goto invalid;
1187                         }
1188                         rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1189                         continue;
1190                 }
1191
1192                 if (strcmp(key, "DEVPATH") == 0) {
1193                         if (op > OP_MATCH_MAX) {
1194                                 err(rules->udev, "invalid DEVPATH operation\n");
1195                                 goto invalid;
1196                         }
1197                         rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1198                         continue;
1199                 }
1200
1201                 if (strcmp(key, "KERNEL") == 0) {
1202                         if (op > OP_MATCH_MAX) {
1203                                 err(rules->udev, "invalid KERNEL operation\n");
1204                                 goto invalid;
1205                         }
1206                         rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1207                         continue;
1208                 }
1209
1210                 if (strcmp(key, "SUBSYSTEM") == 0) {
1211                         if (op > OP_MATCH_MAX) {
1212                                 err(rules->udev, "invalid SUBSYSTEM operation\n");
1213                                 goto invalid;
1214                         }
1215                         /* bus, class, subsystem events should all be the same */
1216                         if (strcmp(value, "subsystem") == 0 ||
1217                             strcmp(value, "bus") == 0 ||
1218                             strcmp(value, "class") == 0) {
1219                                 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1220                                         err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1221                                             "please fix it in %s:%u", value, filename, lineno);
1222                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1223                         } else
1224                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1225                         continue;
1226                 }
1227
1228                 if (strcmp(key, "DRIVER") == 0) {
1229                         if (op > OP_MATCH_MAX) {
1230                                 err(rules->udev, "invalid DRIVER operation\n");
1231                                 goto invalid;
1232                         }
1233                         rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1234                         continue;
1235                 }
1236
1237                 if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1238                         attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1239                         if (attr == NULL) {
1240                                 err(rules->udev, "error parsing ATTR attribute\n");
1241                                 goto invalid;
1242                         }
1243                         if (op < OP_MATCH_MAX) {
1244                                 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1245                         } else {
1246                                 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1247                         }
1248                         continue;
1249                 }
1250
1251                 if (strcmp(key, "KERNELS") == 0) {
1252                         if (op > OP_MATCH_MAX) {
1253                                 err(rules->udev, "invalid KERNELS operation\n");
1254                                 goto invalid;
1255                         }
1256                         rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1257                         continue;
1258                 }
1259
1260                 if (strcmp(key, "ID") == 0) {
1261                         if (!id_warn) {
1262                                 id_warn = true;
1263                                 err(rules->udev, "ID= will be removed in a future udev version, "
1264                                     "please use KERNEL= to match the event device, or KERNELS= "
1265                                     "to match a parent device, in %s:%u\n", filename, lineno);
1266                         }
1267                         if (op > OP_MATCH_MAX) {
1268                                 err(rules->udev, "invalid KERNELS operation\n");
1269                                 goto invalid;
1270                         }
1271                         rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1272                         continue;
1273                 }
1274
1275                 if (strcmp(key, "SUBSYSTEMS") == 0) {
1276                         if (op > OP_MATCH_MAX) {
1277                                 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1278                                 goto invalid;
1279                         }
1280                         rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1281                         continue;
1282                 }
1283
1284                 if (strcmp(key, "BUS") == 0) {
1285                         if (!bus_warn) {
1286                                 bus_warn = true;
1287                                 err(rules->udev, "BUS= will be removed in a future udev version, "
1288                                     "please use SUBSYSTEM= to match the event device, or SUBSYSTEMS= "
1289                                     "to match a parent device, in %s:%u\n", filename, lineno);
1290                         }
1291                         if (op > OP_MATCH_MAX) {
1292                                 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1293                                 goto invalid;
1294                         }
1295                         rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1296                         continue;
1297                 }
1298
1299                 if (strcmp(key, "DRIVERS") == 0) {
1300                         if (op > OP_MATCH_MAX) {
1301                                 err(rules->udev, "invalid DRIVERS operation\n");
1302                                 goto invalid;
1303                         }
1304                         rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1305                         continue;
1306                 }
1307
1308                 if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0) {
1309                         if (op > OP_MATCH_MAX) {
1310                                 err(rules->udev, "invalid ATTRS operation\n");
1311                                 goto invalid;
1312                         }
1313                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1314                         if (attr == NULL) {
1315                                 err(rules->udev, "error parsing ATTRS attribute\n");
1316                                 goto invalid;
1317                         }
1318                         if (strncmp(attr, "device/", 7) == 0)
1319                                 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1320                                     "please fix it in %s:%u", filename, lineno);
1321                         else if (strstr(attr, "../") != NULL)
1322                                 err(rules->udev, "do not reference parent sysfs directories directly, "
1323                                     "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1324                         rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1325                         continue;
1326                 }
1327
1328                 if (strncmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1329                         if (!sysfs_warn) {
1330                                 sysfs_warn = true;
1331                                 err(rules->udev, "SYSFS{}= will be removed in a future udev version, "
1332                                     "please use ATTR{}= to match the event device, or ATTRS{}= "
1333                                     "to match a parent device, in %s:%u\n", filename, lineno);
1334                         }
1335                         if (op > OP_MATCH_MAX) {
1336                                 err(rules->udev, "invalid ATTRS operation\n");
1337                                 goto invalid;
1338                         }
1339                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1340                         if (attr == NULL) {
1341                                 err(rules->udev, "error parsing ATTRS attribute\n");
1342                                 goto invalid;
1343                         }
1344                         rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1345                         continue;
1346                 }
1347
1348                 if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1349                         attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1350                         if (attr == NULL) {
1351                                 err(rules->udev, "error parsing ENV attribute\n");
1352                                 goto invalid;
1353                         }
1354                         if (op < OP_MATCH_MAX) {
1355                                 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1356                                         goto invalid;
1357                         } else {
1358                                 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1359                                         goto invalid;
1360                         }
1361                         continue;
1362                 }
1363
1364                 if (strcmp(key, "PROGRAM") == 0) {
1365                         rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1366                         continue;
1367                 }
1368
1369                 if (strcmp(key, "RESULT") == 0) {
1370                         if (op > OP_MATCH_MAX) {
1371                                 err(rules->udev, "invalid RESULT operation\n");
1372                                 goto invalid;
1373                         }
1374                         rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1375                         continue;
1376                 }
1377
1378                 if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1379                         attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1380                         if (attr != NULL && strstr(attr, "program")) {
1381                                 dbg(rules->udev, "IMPORT will be executed\n");
1382                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1383                         } else if (attr != NULL && strstr(attr, "file")) {
1384                                 dbg(rules->udev, "IMPORT will be included as file\n");
1385                                 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1386                         } else if (attr != NULL && strstr(attr, "db")) {
1387                                 dbg(rules->udev, "IMPORT will include db values\n");
1388                                 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1389                         } else if (attr != NULL && strstr(attr, "parent")) {
1390                                 dbg(rules->udev, "IMPORT will include the parent values\n");
1391                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1392                         } else {
1393                                 /* figure it out if it is executable */
1394                                 char file[UTIL_PATH_SIZE];
1395                                 char *pos;
1396                                 struct stat statbuf;
1397
1398                                 /* allow programs in /lib/udev called without the path */
1399                                 if (value[0] != '/')
1400                                         util_strscpyl(file, sizeof(file), LIBEXECDIR "/", value, NULL);
1401                                 else
1402                                         util_strscpy(file, sizeof(file), value);
1403                                 pos = strchr(file, ' ');
1404                                 if (pos)
1405                                         pos[0] = '\0';
1406                                 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1407                                 if (stat(file, &statbuf) == 0 && (statbuf.st_mode & S_IXUSR)) {
1408                                         dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1409                                         rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1410                                 } else {
1411                                         dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1412                                         rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1413                                 }
1414                         }
1415                         continue;
1416                 }
1417
1418                 if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) {
1419                         mode_t mode = 0;
1420
1421                         if (op > OP_MATCH_MAX) {
1422                                 err(rules->udev, "invalid TEST operation\n");
1423                                 goto invalid;
1424                         }
1425                         attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1426                         if (attr != NULL) {
1427                                 mode = strtol(attr, NULL, 8);
1428                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1429                         } else {
1430                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1431                         }
1432                         continue;
1433                 }
1434
1435                 if (strncmp(key, "RUN", sizeof("RUN")-1) == 0) {
1436                         int flag = 0;
1437
1438                         attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1439                         if (attr != NULL && strstr(attr, "fail_event_on_error"))
1440                                 flag = 1;
1441                         rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1442                         continue;
1443                 }
1444
1445                 if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) {
1446                         rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1447                         continue;
1448                 }
1449
1450                 if (strcmp(key, "LABEL") == 0) {
1451                         rule_tmp.rule.rule.label_off = add_string(rules, value);
1452                         continue;
1453                 }
1454
1455                 if (strcmp(key, "GOTO") == 0) {
1456                         rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1457                         continue;
1458                 }
1459
1460                 if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) {
1461                         if (op < OP_MATCH_MAX) {
1462                                 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1463                         } else {
1464                                 if (value[0] == '\0')
1465                                         info(rules->udev, "name empty, node creation suppressed\n");
1466                                 else if (strcmp(value, "%k") == 0)
1467                                         err(rules->udev, "NAME=\"%%k\" is superfluous and breaks "
1468                                             "kernel supplied names, please remove it from %s:%u\n", filename, lineno);
1469                                 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1470                                 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1471                                 if (attr != NULL) {
1472                                         if (strstr(attr, "all_partitions") != NULL) {
1473                                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1474
1475                                                 dbg(rules->udev, "creation of partition nodes requested\n");
1476                                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1477                                         }
1478                                         if (strstr(attr, "ignore_remove") != NULL) {
1479                                                 dbg(rules->udev, "remove event should be ignored\n");
1480                                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1481                                         }
1482                                 }
1483                         }
1484                         rule_tmp.rule.rule.flags = 1;
1485                         continue;
1486                 }
1487
1488                 if (strncmp(key, "SYMLINK", sizeof("SYMLINK")-1) == 0) {
1489                         if (op < OP_MATCH_MAX) {
1490                                 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1491                         } else {
1492                                 int flag = 0;
1493
1494                                 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1495                                 if (attr != NULL && strstr(attr, "unique") != NULL)
1496                                         flag = 1;
1497                                 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1498                         }
1499                         rule_tmp.rule.rule.flags = 1;
1500                         continue;
1501                 }
1502
1503                 if (strcmp(key, "OWNER") == 0) {
1504                         uid_t uid;
1505                         char *endptr;
1506
1507                         uid = strtoul(value, &endptr, 10);
1508                         if (endptr[0] == '\0') {
1509                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1510                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1511                                 uid = add_uid(rules, value);
1512                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1513                         } else if (rules->resolve_names >= 0) {
1514                                 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1515                         }
1516                         rule_tmp.rule.rule.flags = 1;
1517                         continue;
1518                 }
1519
1520                 if (strcmp(key, "GROUP") == 0) {
1521                         gid_t gid;
1522                         char *endptr;
1523
1524                         gid = strtoul(value, &endptr, 10);
1525                         if (endptr[0] == '\0') {
1526                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1527                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1528                                 gid = add_gid(rules, value);
1529                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1530                         } else if (rules->resolve_names >= 0) {
1531                                 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1532                         }
1533                         rule_tmp.rule.rule.flags = 1;
1534                         continue;
1535                 }
1536
1537                 if (strcmp(key, "MODE") == 0) {
1538                         mode_t mode;
1539                         char *endptr;
1540
1541                         mode = strtol(value, &endptr, 8);
1542                         if (endptr[0] == '\0')
1543                                 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1544                         else
1545                                 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1546                         rule_tmp.rule.rule.flags = 1;
1547                         continue;
1548                 }
1549
1550                 if (strcmp(key, "OPTIONS") == 0) {
1551                         const char *pos;
1552
1553                         if (strstr(value, "ignore_remove") != NULL) {
1554                                 dbg(rules->udev, "remove event should be ignored\n");
1555                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1556                         }
1557                         pos = strstr(value, "link_priority=");
1558                         if (pos != NULL) {
1559                                 int prio = atoi(&pos[strlen("link_priority=")]);
1560
1561                                 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1562                                 dbg(rules->udev, "link priority=%i\n", prio);
1563                         }
1564                         pos = strstr(value, "event_timeout=");
1565                         if (pos != NULL) {
1566                                 int tout = atoi(&pos[strlen("event_timeout=")]);
1567
1568                                 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1569                                 dbg(rules->udev, "event timeout=%i\n", tout);
1570                         }
1571                         pos = strstr(value, "string_escape=");
1572                         if (pos != NULL) {
1573                                 pos = &pos[strlen("string_escape=")];
1574                                 if (strncmp(pos, "none", strlen("none")) == 0)
1575                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1576                                 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1577                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1578                         }
1579                         if (strstr(value, "all_partitions") != NULL) {
1580                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1581
1582                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1583                                 dbg(rules->udev, "creation of partition nodes requested\n");
1584                         }
1585                         pos = strstr(value, "nowatch");
1586                         if (pos != NULL) {
1587                                 const int off = 0;
1588
1589                                 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &off);
1590                                 dbg(rules->udev, "inotify watch of device disabled\n");
1591                         } else {
1592                                 pos = strstr(value, "watch");
1593                                 if (pos != NULL) {
1594                                         const int on = 1;
1595
1596                                         rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &on);
1597                                         dbg(rules->udev, "inotify watch of device requested\n");
1598                                 }
1599                         }
1600                         continue;
1601                 }
1602                 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1603         }
1604
1605         /* add rule token */
1606         rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1607         if (add_token(rules, &rule_tmp.rule) != 0)
1608                 goto invalid;
1609
1610         /* add tokens to list, sorted by type */
1611         if (sort_token(rules, &rule_tmp) != 0)
1612                 goto invalid;
1613
1614         return 0;
1615 invalid:
1616         err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1617         return -1;
1618 }
1619
1620 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1621 {
1622         FILE *f;
1623         unsigned int first_token;
1624         char line[UTIL_LINE_SIZE];
1625         int line_nr = 0;
1626         unsigned int i;
1627
1628         info(rules->udev, "reading '%s' as rules file\n", filename);
1629
1630         f = fopen(filename, "r");
1631         if (f == NULL)
1632                 return -1;
1633
1634         first_token = rules->token_cur;
1635
1636         while (fgets(line, sizeof(line), f) != NULL) {
1637                 char *key;
1638                 size_t len;
1639
1640                 /* skip whitespace */
1641                 line_nr++;
1642                 key = line;
1643                 while (isspace(key[0]))
1644                         key++;
1645
1646                 /* comment */
1647                 if (key[0] == '#')
1648                         continue;
1649
1650                 len = strlen(line);
1651                 if (len < 3)
1652                         continue;
1653
1654                 /* continue reading if backslash+newline is found */
1655                 while (line[len-2] == '\\') {
1656                         if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1657                                 break;
1658                         if (strlen(&line[len-2]) < 2)
1659                                 break;
1660                         line_nr++;
1661                         len = strlen(line);
1662                 }
1663
1664                 if (len+1 >= sizeof(line)) {
1665                         err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1666                         continue;
1667                 }
1668                 add_rule(rules, key, filename, filename_off, line_nr);
1669         }
1670         fclose(f);
1671
1672         /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1673         for (i = first_token+1; i < rules->token_cur; i++) {
1674                 if (rules->tokens[i].type == TK_A_GOTO) {
1675                         char *label = &rules->buf[rules->tokens[i].key.value_off];
1676                         unsigned int j;
1677
1678                         for (j = i+1; j < rules->token_cur; j++) {
1679                                 if (rules->tokens[j].type != TK_RULE)
1680                                         continue;
1681                                 if (rules->tokens[j].rule.label_off == 0)
1682                                         continue;
1683                                 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1684                                         continue;
1685                                 rules->tokens[i].key.rule_goto = j;
1686                                 break;
1687                         }
1688                         if (rules->tokens[i].key.rule_goto == 0)
1689                                 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1690                 }
1691         }
1692         return 0;
1693 }
1694
1695 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1696 {
1697         DIR *dir;
1698         char filename[UTIL_PATH_SIZE];
1699
1700         dbg(udev, "open directory '%s'\n", dirname);
1701         dir = opendir(dirname);
1702         if (dir == NULL) {
1703                 info(udev, "unable to open '%s': %m\n", dirname);
1704                 return -1;
1705         }
1706
1707         while (1) {
1708                 struct dirent *dent;
1709
1710                 dent = readdir(dir);
1711                 if (dent == NULL || dent->d_name[0] == '\0')
1712                         break;
1713
1714                 if (dent->d_name[0] == '.')
1715                         continue;
1716
1717                 /* look for file matching with specified suffix */
1718                 if (suffix != NULL) {
1719                         const char *ext;
1720
1721                         ext = strrchr(dent->d_name, '.');
1722                         if (ext == NULL)
1723                                 continue;
1724                         if (strcmp(ext, suffix) != 0)
1725                                 continue;
1726                 }
1727                 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1728                 dbg(udev, "put file '%s' into list\n", filename);
1729                 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1730         }
1731
1732         closedir(dir);
1733         return 0;
1734 }
1735
1736 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1737 {
1738         struct udev_rules *rules;
1739         struct stat statbuf;
1740         struct udev_list_node file_list;
1741         struct udev_list_entry *file_loop, *file_tmp;
1742         struct token end_token;
1743
1744         rules = malloc(sizeof(struct udev_rules));
1745         if (rules == NULL)
1746                 return NULL;
1747         memset(rules, 0x00, sizeof(struct udev_rules));
1748         rules->udev = udev;
1749         rules->resolve_names = resolve_names;
1750         udev_list_init(&file_list);
1751
1752         /* init token array and string buffer */
1753         rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1754         if (rules->tokens == NULL)
1755                 return NULL;
1756         rules->token_max = PREALLOC_TOKEN;
1757
1758         rules->buf = malloc(PREALLOC_STRBUF);
1759         if (rules->buf == NULL)
1760                 return NULL;
1761         rules->buf_max = PREALLOC_STRBUF;
1762         /* offset 0 is always '\0' */
1763         rules->buf[0] = '\0';
1764         rules->buf_cur = 1;
1765         dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1766             rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1767
1768         rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1769         if (rules->trie_nodes == NULL)
1770                 return NULL;
1771         rules->trie_nodes_max = PREALLOC_TRIE;
1772         /* offset 0 is the trie root, with an empty string */
1773         memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1774         rules->trie_nodes_cur = 1;
1775
1776         if (udev_get_rules_path(udev) != NULL) {
1777                 /* custom rules location for testing */
1778                 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1779         } else {
1780                 char filename[PATH_MAX];
1781                 struct udev_list_node sort_list;
1782                 struct udev_list_entry *sort_loop, *sort_tmp;
1783
1784                 /* read user/custom rules */
1785                 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1786
1787                 /* read dynamic/temporary rules */
1788                 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
1789                 udev_list_init(&sort_list);
1790                 add_matching_files(udev, &sort_list, filename, ".rules");
1791
1792                 /* read default rules */
1793                 add_matching_files(udev, &sort_list, LIBEXECDIR "/rules.d", ".rules");
1794
1795                 /* sort all rules files by basename into list of files */
1796                 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1797                         const char *sort_name = udev_list_entry_get_name(sort_loop);
1798                         const char *sort_base = strrchr(sort_name, '/');
1799
1800                         if (sort_base == NULL)
1801                                 continue;
1802                         /* sort entry into existing list */
1803                         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1804                                 const char *file_name = udev_list_entry_get_name(file_loop);
1805                                 const char *file_base = strrchr(file_name, '/');
1806
1807                                 if (file_base == NULL)
1808                                         continue;
1809                                 if (strcmp(file_base, sort_base) == 0) {
1810                                         info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1811                                              file_name, sort_name);
1812                                         udev_list_entry_delete(sort_loop);
1813                                         sort_loop = NULL;
1814                                         break;
1815                                 }
1816                                 if (strcmp(file_base, sort_base) > 0) {
1817                                         /* found later file, insert before */
1818                                         udev_list_entry_remove(sort_loop);
1819                                         udev_list_entry_insert_before(sort_loop, file_loop);
1820                                         sort_loop = NULL;
1821                                         break;
1822                                 }
1823                         }
1824                         /* current file already handled */
1825                         if (sort_loop == NULL)
1826                                 continue;
1827                         /* no later file, append to end of list */
1828                         udev_list_entry_remove(sort_loop);
1829                         udev_list_entry_append(sort_loop, &file_list);
1830                 }
1831         }
1832
1833         /* add all filenames to the string buffer */
1834         udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1835                 const char *filename = udev_list_entry_get_name(file_loop);
1836                 unsigned int filename_off;
1837
1838                 filename_off = add_string(rules, filename);
1839                 /* the offset in the rule is limited to unsigned short */
1840                 if (filename_off < USHRT_MAX)
1841                         udev_list_entry_set_flags(file_loop, filename_off);
1842         }
1843
1844         /* parse list of files */
1845         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1846                 const char *filename = udev_list_entry_get_name(file_loop);
1847                 unsigned int filename_off = udev_list_entry_get_flags(file_loop);
1848
1849                 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1850                         parse_file(rules, filename, filename_off);
1851                 else
1852                         err(udev, "can not read '%s'\n", filename);
1853                 udev_list_entry_delete(file_loop);
1854         }
1855
1856         memset(&end_token, 0x00, sizeof(struct token));
1857         end_token.type = TK_END;
1858         add_token(rules, &end_token);
1859
1860         /* shrink allocated token and string buffer */
1861         if (rules->token_cur < rules->token_max) {
1862                 struct token *tokens;
1863
1864                 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1865                 if (tokens != NULL || rules->token_cur == 0) {
1866                         rules->tokens = tokens;
1867                         rules->token_max = rules->token_cur;
1868                 }
1869         }
1870         if (rules->buf_cur < rules->buf_max) {
1871                 char *buf;
1872
1873                 buf = realloc(rules->buf, rules->buf_cur);
1874                 if (buf != NULL || rules->buf_cur == 0) {
1875                         rules->buf = buf;
1876                         rules->buf_max = rules->buf_cur;
1877                 }
1878         }
1879         info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1880              rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1881         info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1882              rules->trie_nodes_cur * sizeof(struct trie_node),
1883              rules->trie_nodes_cur, sizeof(struct trie_node));
1884
1885         /* cleanup trie */
1886         free(rules->trie_nodes);
1887         rules->trie_nodes = NULL;
1888         rules->trie_nodes_cur = 0;
1889         rules->trie_nodes_max = 0;
1890
1891         /* cleanup uid/gid cache */
1892         free(rules->uids);
1893         rules->uids = NULL;
1894         rules->uids_cur = 0;
1895         rules->uids_max = 0;
1896         free(rules->gids);
1897         rules->gids = NULL;
1898         rules->gids_cur = 0;
1899         rules->gids_max = 0;
1900
1901         dump_rules(rules);
1902         return rules;
1903 }
1904
1905 void udev_rules_unref(struct udev_rules *rules)
1906 {
1907         if (rules == NULL)
1908                 return;
1909         free(rules->tokens);
1910         free(rules->buf);
1911         free(rules->trie_nodes);
1912         free(rules->uids);
1913         free(rules->gids);
1914         free(rules);
1915 }
1916
1917 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1918 {
1919         char *key_value = &rules->buf[token->key.value_off];
1920         char *pos;
1921         int match = 0;
1922
1923         if (val == NULL)
1924                 val = "";
1925
1926         switch (token->key.glob) {
1927         case GL_PLAIN:
1928                 match = (strcmp(key_value, val) == 0);
1929                 break;
1930         case GL_GLOB:
1931                 match = (fnmatch(key_value, val, 0) == 0);
1932                 break;
1933         case GL_SPLIT:
1934                 {
1935                         const char *split;
1936                         size_t len;
1937
1938                         split = &rules->buf[token->key.value_off];
1939                         len = strlen(val);
1940                         while (1) {
1941                                 const char *next;
1942
1943                                 next = strchr(split, '|');
1944                                 if (next != NULL) {
1945                                         size_t matchlen = (size_t)(next - split);
1946
1947                                         match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1948                                         if (match)
1949                                                 break;
1950                                 } else {
1951                                         match = (strcmp(split, val) == 0);
1952                                         break;
1953                                 }
1954                                 split = &next[1];
1955                         }
1956                         break;
1957                 }
1958         case GL_SPLIT_GLOB:
1959                 {
1960                         char value[UTIL_PATH_SIZE];
1961
1962                         util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1963                         key_value = value;
1964                         while (key_value != NULL) {
1965                                 pos = strchr(key_value, '|');
1966                                 if (pos != NULL) {
1967                                         pos[0] = '\0';
1968                                         pos = &pos[1];
1969                                 }
1970                                 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1971                                 match = (fnmatch(key_value, val, 0) == 0);
1972                                 if (match)
1973                                         break;
1974                                 key_value = pos;
1975                         }
1976                         break;
1977                 }
1978         case GL_SOMETHING:
1979                 match = (val[0] != '\0');
1980                 break;
1981         case GL_UNSET:
1982                 return -1;
1983         }
1984
1985         if (match && (token->key.op == OP_MATCH)) {
1986                 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1987                 return 0;
1988         }
1989         if (!match && (token->key.op == OP_NOMATCH)) {
1990                 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1991                 return 0;
1992         }
1993         dbg(rules->udev, "%s is not true\n", token_str(token->type));
1994         return -1;
1995 }
1996
1997 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1998 {
1999         const char *name;
2000         char nbuf[UTIL_NAME_SIZE];
2001         const char *value;
2002         char vbuf[UTIL_NAME_SIZE];
2003         size_t len;
2004
2005         name = &rules->buf[cur->key.attr_off];
2006         switch (cur->key.attrsubst) {
2007         case SB_FORMAT:
2008                 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
2009                 name = nbuf;
2010                 /* fall through */
2011         case SB_NONE:
2012                 value = udev_device_get_sysattr_value(dev, name);
2013                 if (value == NULL)
2014                         return -1;
2015                 break;
2016         case SB_SUBSYS:
2017                 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
2018                         return -1;
2019                 value = vbuf;
2020                 break;
2021         default:
2022                 return -1;
2023         }
2024
2025         /* remove trailing whitespace, if not asked to match for it */
2026         len = strlen(value);
2027         if (len > 0 && isspace(value[len-1])) {
2028                 const char *key_value;
2029                 size_t klen;
2030
2031                 key_value = &rules->buf[cur->key.value_off];
2032                 klen = strlen(key_value);
2033                 if (klen > 0 && !isspace(key_value[klen-1])) {
2034                         if (value != vbuf) {
2035                                 util_strscpy(vbuf, sizeof(vbuf), value);
2036                                 value = vbuf;
2037                         }
2038                         while (len > 0 && isspace(vbuf[--len]))
2039                                 vbuf[len] = '\0';
2040                         dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
2041                 }
2042         }
2043
2044         return match_key(rules, cur, value);
2045 }
2046
2047 enum escape_type {
2048         ESCAPE_UNSET,
2049         ESCAPE_NONE,
2050         ESCAPE_REPLACE,
2051 };
2052
2053 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
2054 {
2055         struct token *cur;
2056         struct token *rule;
2057         enum escape_type esc = ESCAPE_UNSET;
2058         bool can_set_name;
2059
2060         if (rules->tokens == NULL)
2061                 return -1;
2062
2063         can_set_name = ((strcmp(udev_device_get_action(event->dev), "remove") != 0) &&
2064                         (major(udev_device_get_devnum(event->dev)) > 0 ||
2065                          strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
2066
2067         /* loop through token list, match, run actions or forward to next rule */
2068         cur = &rules->tokens[0];
2069         rule = cur;
2070         while (1) {
2071                 dump_token(rules, cur);
2072                 switch (cur->type) {
2073                 case TK_RULE:
2074                         /* current rule */
2075                         rule = cur;
2076                         /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2077                         if (!can_set_name && rule->rule.flags)
2078                                 goto nomatch;
2079                         esc = ESCAPE_UNSET;
2080                         break;
2081                 case TK_M_ACTION:
2082                         if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2083                                 goto nomatch;
2084                         break;
2085                 case TK_M_DEVPATH:
2086                         if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2087                                 goto nomatch;
2088                         break;
2089                 case TK_M_KERNEL:
2090                         if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2091                                 goto nomatch;
2092                         break;
2093                 case TK_M_DEVLINK:
2094                         {
2095                                 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2096                                 struct udev_list_entry *list_entry;
2097                                 int match = 0;
2098
2099                                 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2100                                         const char *devlink;
2101
2102                                         devlink =  &udev_list_entry_get_name(list_entry)[devlen];
2103                                         if (match_key(rules, cur, devlink) == 0) {
2104                                                 match = 1;
2105                                                 break;
2106                                         }
2107                                 }
2108                                 if (!match)
2109                                         goto nomatch;
2110                                 break;
2111                         }
2112                 case TK_M_NAME:
2113                         if (match_key(rules, cur, event->name) != 0)
2114                                 goto nomatch;
2115                         break;
2116                 case TK_M_ENV:
2117                         {
2118                                 const char *key_name = &rules->buf[cur->key.attr_off];
2119                                 const char *value;
2120
2121                                 value = udev_device_get_property_value(event->dev, key_name);
2122                                 if (value == NULL) {
2123                                         dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2124                                         value = "";
2125                                 }
2126                                 if (match_key(rules, cur, value))
2127                                         goto nomatch;
2128                                 break;
2129                         }
2130                 case TK_M_SUBSYSTEM:
2131                         if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2132                                 goto nomatch;
2133                         break;
2134                 case TK_M_DRIVER:
2135                         if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2136                                 goto nomatch;
2137                         break;
2138                 case TK_M_WAITFOR:
2139                         {
2140                                 char filename[UTIL_PATH_SIZE];
2141                                 int found;
2142
2143                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2144                                 found = (wait_for_file(event->dev, filename, 10) == 0);
2145                                 if (!found && (cur->key.op != OP_NOMATCH))
2146                                         goto nomatch;
2147                                 break;
2148                         }
2149                 case TK_M_ATTR:
2150                         if (match_attr(rules, event->dev, event, cur) != 0)
2151                                 goto nomatch;
2152                         break;
2153                 case TK_M_KERNELS:
2154                 case TK_M_SUBSYSTEMS:
2155                 case TK_M_DRIVERS:
2156                 case TK_M_ATTRS:
2157                         {
2158                                 struct token *next;
2159
2160                                 /* get whole sequence of parent matches */
2161                                 next = cur;
2162                                 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2163                                         next++;
2164
2165                                 /* loop over parents */
2166                                 event->dev_parent = event->dev;
2167                                 while (1) {
2168                                         struct token *key;
2169
2170                                         dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2171                                         /* loop over sequence of parent match keys */
2172                                         for (key = cur; key < next; key++ ) {
2173                                                 dump_token(rules, key);
2174                                                 switch(key->type) {
2175                                                 case TK_M_KERNELS:
2176                                                         if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2177                                                                 goto try_parent;
2178                                                         break;
2179                                                 case TK_M_SUBSYSTEMS:
2180                                                         if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2181                                                                 goto try_parent;
2182                                                         break;
2183                                                 case TK_M_DRIVERS:
2184                                                         if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2185                                                                 goto try_parent;
2186                                                         break;
2187                                                 case TK_M_ATTRS:
2188                                                         if (match_attr(rules, event->dev_parent, event, key) != 0)
2189                                                                 goto try_parent;
2190                                                         break;
2191                                                 default:
2192                                                         goto nomatch;
2193                                                 }
2194                                                 dbg(event->udev, "parent key matched\n");
2195                                         }
2196                                         dbg(event->udev, "all parent keys matched\n");
2197                                         /* all keys matched */
2198                                         break;
2199
2200                                 try_parent:
2201                                         event->dev_parent = udev_device_get_parent(event->dev_parent);
2202                                         if (event->dev_parent == NULL)
2203                                                 goto nomatch;
2204                                 }
2205                                 /* move behind our sequence of parent match keys */
2206                                 cur = next;
2207                                 continue;
2208                         }
2209                 case TK_M_TEST:
2210                         {
2211                                 char filename[UTIL_PATH_SIZE];
2212                                 struct stat statbuf;
2213                                 int match;
2214
2215                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2216                                 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2217                                         if (filename[0] != '/') {
2218                                                 char tmp[UTIL_PATH_SIZE];
2219
2220                                                 util_strscpy(tmp, sizeof(tmp), filename);
2221                                                 util_strscpyl(filename, sizeof(filename),
2222                                                               udev_device_get_syspath(event->dev), "/", tmp, NULL);
2223                                         }
2224                                 }
2225                                 attr_subst_subdir(filename, sizeof(filename));
2226
2227                                 match = (stat(filename, &statbuf) == 0);
2228                                 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2229                                 if (match && cur->key.mode > 0) {
2230                                         match = ((statbuf.st_mode & cur->key.mode) > 0);
2231                                         dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2232                                             match ? "matches" : "does not match", cur->key.mode);
2233                                 }
2234                                 if (match && cur->key.op == OP_NOMATCH)
2235                                         goto nomatch;
2236                                 if (!match && cur->key.op == OP_MATCH)
2237                                         goto nomatch;
2238                                 break;
2239                         }
2240                 case TK_M_PROGRAM:
2241                         {
2242                                 char program[UTIL_PATH_SIZE];
2243                                 char **envp;
2244                                 char result[UTIL_PATH_SIZE];
2245
2246                                 free(event->program_result);
2247                                 event->program_result = NULL;
2248                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2249                                 envp = udev_device_get_properties_envp(event->dev);
2250                                 info(event->udev, "PROGRAM '%s' %s:%u\n",
2251                                      program,
2252                                      &rules->buf[rule->rule.filename_off],
2253                                      rule->rule.filename_line);
2254                                 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL, NULL) != 0) {
2255                                         if (cur->key.op != OP_NOMATCH)
2256                                                 goto nomatch;
2257                                 } else {
2258                                         int count;
2259
2260                                         util_remove_trailing_chars(result, '\n');
2261                                         if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2262                                                 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2263                                                 if (count > 0)
2264                                                         info(event->udev, "%i character(s) replaced\n" , count);
2265                                         }
2266                                         event->program_result = strdup(result);
2267                                         dbg(event->udev, "storing result '%s'\n", event->program_result);
2268                                         if (cur->key.op == OP_NOMATCH)
2269                                                 goto nomatch;
2270                                 }
2271                                 break;
2272                         }
2273                 case TK_M_IMPORT_FILE:
2274                         {
2275                                 char import[UTIL_PATH_SIZE];
2276
2277                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2278                                 if (import_file_into_properties(event->dev, import) != 0)
2279                                         if (cur->key.op != OP_NOMATCH)
2280                                                 goto nomatch;
2281                                 break;
2282                         }
2283                 case TK_M_IMPORT_PROG:
2284                         {
2285                                 char import[UTIL_PATH_SIZE];
2286
2287                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2288                                 info(event->udev, "IMPORT '%s' %s:%u\n",
2289                                      import,
2290                                      &rules->buf[rule->rule.filename_off],
2291                                      rule->rule.filename_line);
2292                                 if (import_program_into_properties(event->dev, import) != 0)
2293                                         if (cur->key.op != OP_NOMATCH)
2294                                                 goto nomatch;
2295                                 break;
2296                         }
2297                 case TK_M_IMPORT_DB:
2298                         {
2299                                 const char *key = &rules->buf[cur->key.value_off];
2300                                 const char *value;
2301
2302                                 value = udev_device_get_property_value(event->dev_db, key);
2303                                 if (value != NULL) {
2304                                         struct udev_list_entry *entry;
2305
2306                                         entry = udev_device_add_property(event->dev, key, value);
2307                                         udev_list_entry_set_flags(entry, 1);
2308                                 } else {
2309                                         if (cur->key.op != OP_NOMATCH)
2310                                                 goto nomatch;
2311                                 }
2312                                 break;
2313                         }
2314                 case TK_M_IMPORT_PARENT:
2315                         {
2316                                 char import[UTIL_PATH_SIZE];
2317
2318                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2319                                 if (import_parent_into_properties(event->dev, import) != 0)
2320                                         if (cur->key.op != OP_NOMATCH)
2321                                                 goto nomatch;
2322                                 break;
2323                         }
2324                 case TK_M_RESULT:
2325                         if (match_key(rules, cur, event->program_result) != 0)
2326                                 goto nomatch;
2327                         break;
2328                 case TK_A_STRING_ESCAPE_NONE:
2329                         esc = ESCAPE_NONE;
2330                         break;
2331                 case TK_A_STRING_ESCAPE_REPLACE:
2332                         esc = ESCAPE_REPLACE;
2333                         break;
2334                 case TK_A_NUM_FAKE_PART:
2335                         if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2336                                 break;
2337                         if (udev_device_get_sysnum(event->dev) != NULL)
2338                                 break;
2339                         udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2340                         break;
2341                 case TK_A_INOTIFY_WATCH:
2342                         event->inotify_watch = cur->key.watch;
2343                         break;
2344                 case TK_A_DEVLINK_PRIO:
2345                         udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2346                         break;
2347                 case TK_A_OWNER:
2348                         {
2349                                 char owner[UTIL_NAME_SIZE];
2350
2351                                 if (event->owner_final)
2352                                         break;
2353                                 if (cur->key.op == OP_ASSIGN_FINAL)
2354                                         event->owner_final = 1;
2355                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2356                                 event->uid = util_lookup_user(event->udev, owner);
2357                                 info(event->udev, "OWNER %u %s:%u\n",
2358                                      event->uid,
2359                                      &rules->buf[rule->rule.filename_off],
2360                                      rule->rule.filename_line);
2361                                 break;
2362                         }
2363                 case TK_A_GROUP:
2364                         {
2365                                 char group[UTIL_NAME_SIZE];
2366
2367                                 if (event->group_final)
2368                                         break;
2369                                 if (cur->key.op == OP_ASSIGN_FINAL)
2370                                         event->group_final = 1;
2371                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2372                                 event->gid = util_lookup_group(event->udev, group);
2373                                 info(event->udev, "GROUP %u %s:%u\n",
2374                                      event->gid,
2375                                      &rules->buf[rule->rule.filename_off],
2376                                      rule->rule.filename_line);
2377                                 break;
2378                         }
2379                 case TK_A_MODE:
2380                         {
2381                                 char mode[UTIL_NAME_SIZE];
2382                                 char *endptr;
2383
2384                                 if (event->mode_final)
2385                                         break;
2386                                 if (cur->key.op == OP_ASSIGN_FINAL)
2387                                         event->mode_final = 1;
2388                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode, sizeof(mode));
2389                                 event->mode = strtol(mode, &endptr, 8);
2390                                 if (endptr[0] != '\0') {
2391                                         err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2392                                         event->mode = 0660;
2393                                 }
2394                                 info(event->udev, "MODE %#o %s:%u\n",
2395                                      event->mode,
2396                                      &rules->buf[rule->rule.filename_off],
2397                                      rule->rule.filename_line);
2398                                 break;
2399                         }
2400                 case TK_A_OWNER_ID:
2401                         if (event->owner_final)
2402                                 break;
2403                         if (cur->key.op == OP_ASSIGN_FINAL)
2404                                 event->owner_final = 1;
2405                         event->uid = cur->key.uid;
2406                         info(event->udev, "OWNER %u %s:%u\n",
2407                              event->uid,
2408                              &rules->buf[rule->rule.filename_off],
2409                              rule->rule.filename_line);
2410                         break;
2411                 case TK_A_GROUP_ID:
2412                         if (event->group_final)
2413                                 break;
2414                         if (cur->key.op == OP_ASSIGN_FINAL)
2415                                 event->group_final = 1;
2416                         event->gid = cur->key.gid;
2417                         info(event->udev, "GROUP %u %s:%u\n",
2418                              event->gid,
2419                              &rules->buf[rule->rule.filename_off],
2420                              rule->rule.filename_line);
2421                         break;
2422                 case TK_A_MODE_ID:
2423                         if (event->mode_final)
2424                                 break;
2425                         if (cur->key.op == OP_ASSIGN_FINAL)
2426                                 event->mode_final = 1;
2427                         event->mode = cur->key.mode;
2428                         info(event->udev, "MODE %#o %s:%u\n",
2429                              event->mode,
2430                              &rules->buf[rule->rule.filename_off],
2431                              rule->rule.filename_line);
2432                         break;
2433                 case TK_A_ENV:
2434                         {
2435                                 const char *name = &rules->buf[cur->key.attr_off];
2436                                 char *value = &rules->buf[cur->key.value_off];
2437
2438                                 if (value[0] != '\0') {
2439                                         char temp_value[UTIL_NAME_SIZE];
2440                                         struct udev_list_entry *entry;
2441
2442                                         udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2443                                         entry = udev_device_add_property(event->dev, name, temp_value);
2444                                         /* store in db, skip private keys */
2445                                         if (name[0] != '.')
2446                                                 udev_list_entry_set_flags(entry, 1);
2447                                 } else {
2448                                         udev_device_add_property(event->dev, name, NULL);
2449                                 }
2450                                 break;
2451                         }
2452                 case TK_A_NAME:
2453                         {
2454                                 const char *name  = &rules->buf[cur->key.value_off];
2455                                 char name_str[UTIL_PATH_SIZE];
2456                                 int count;
2457
2458                                 if (event->name_final)
2459                                         break;
2460                                 if (cur->key.op == OP_ASSIGN_FINAL)
2461                                         event->name_final = 1;
2462                                 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2463                                 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2464                                         count = udev_util_replace_chars(name_str, "/");
2465                                         if (count > 0)
2466                                                 info(event->udev, "%i character(s) replaced\n", count);
2467                                 }
2468                                 free(event->name);
2469                                 event->name = strdup(name_str);
2470                                 info(event->udev, "NAME '%s' %s:%u\n",
2471                                      event->name,
2472                                      &rules->buf[rule->rule.filename_off],
2473                                      rule->rule.filename_line);
2474                                 break;
2475                         }
2476                 case TK_A_DEVLINK:
2477                         {
2478                                 char temp[UTIL_PATH_SIZE];
2479                                 char filename[UTIL_PATH_SIZE];
2480                                 char *pos, *next;
2481                                 int count = 0;
2482
2483                                 if (event->devlink_final)
2484                                         break;
2485                                 if (major(udev_device_get_devnum(event->dev)) == 0)
2486                                         break;
2487                                 if (cur->key.op == OP_ASSIGN_FINAL)
2488                                         event->devlink_final = 1;
2489                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2490                                         udev_device_cleanup_devlinks_list(event->dev);
2491
2492                                 /* allow  multiple symlinks separated by spaces */
2493                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2494                                 if (esc == ESCAPE_UNSET)
2495                                         count = udev_util_replace_chars(temp, "/ ");
2496                                 else if (esc == ESCAPE_REPLACE)
2497                                         count = udev_util_replace_chars(temp, "/");
2498                                 if (count > 0)
2499                                         info(event->udev, "%i character(s) replaced\n" , count);
2500                                 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2501                                 pos = temp;
2502                                 while (isspace(pos[0]))
2503                                         pos++;
2504                                 next = strchr(pos, ' ');
2505                                 while (next != NULL) {
2506                                         next[0] = '\0';
2507                                         info(event->udev, "LINK '%s' %s:%u\n", pos,
2508                                              &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2509                                         util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2510                                         udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2511                                         while (isspace(next[1]))
2512                                                 next++;
2513                                         pos = &next[1];
2514                                         next = strchr(pos, ' ');
2515                                 }
2516                                 if (pos[0] != '\0') {
2517                                         info(event->udev, "LINK '%s' %s:%u\n", pos,
2518                                              &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2519                                         util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2520                                         udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2521                                 }
2522                         }
2523                         break;
2524                 case TK_A_EVENT_TIMEOUT:
2525                         udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2526                         break;
2527                 case TK_A_IGNORE_REMOVE:
2528                         udev_device_set_ignore_remove(event->dev, 1);
2529                         break;
2530                 case TK_A_ATTR:
2531                         {
2532                                 const char *key_name = &rules->buf[cur->key.attr_off];
2533                                 char attr[UTIL_PATH_SIZE];
2534                                 char value[UTIL_NAME_SIZE];
2535                                 FILE *f;
2536
2537                                 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2538                                         util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2539                                 attr_subst_subdir(attr, sizeof(attr));
2540
2541                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2542                                 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2543                                      &rules->buf[rule->rule.filename_off],
2544                                      rule->rule.filename_line);
2545                                 f = fopen(attr, "w");
2546                                 if (f != NULL) {
2547                                         if (fprintf(f, "%s", value) <= 0)
2548                                                 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2549                                         fclose(f);
2550                                 } else {
2551                                         err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2552                                 }
2553                                 break;
2554                         }
2555                 case TK_A_RUN:
2556                         {
2557                                 struct udev_list_entry *list_entry;
2558
2559                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2560                                         udev_list_cleanup_entries(event->udev, &event->run_list);
2561                                 info(event->udev, "RUN '%s' %s:%u\n",
2562                                      &rules->buf[cur->key.value_off],
2563                                      &rules->buf[rule->rule.filename_off],
2564                                      rule->rule.filename_line);
2565                                 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2566                                                                  &rules->buf[cur->key.value_off], NULL, 1, 0);
2567                                 if (cur->key.fail_on_error)
2568                                         udev_list_entry_set_flags(list_entry, 1);
2569                                 break;
2570                         }
2571                 case TK_A_GOTO:
2572                         if (cur->key.rule_goto == 0)
2573                                 break;
2574                         cur = &rules->tokens[cur->key.rule_goto];
2575                         continue;
2576                 case TK_END:
2577                         return 0;
2578
2579                 case TK_M_PARENTS_MIN:
2580                 case TK_M_PARENTS_MAX:
2581                 case TK_M_MAX:
2582                 case TK_UNSET:
2583                         err(rules->udev, "wrong type %u\n", cur->type);
2584                         goto nomatch;
2585                 }
2586
2587                 cur++;
2588                 continue;
2589         nomatch:
2590                 /* fast-forward to next rule */
2591                 cur = rule + rule->rule.token_count;
2592                 dbg(rules->udev, "forward to rule: %u\n",
2593                                  (unsigned int) (cur - rules->tokens));
2594         }
2595 }