udev/udev-rules.c

   1 /*
   2  * Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <stddef.h>
  19 #include <limits.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <stdio.h>
  23 #include <fcntl.h>
  24 #include <ctype.h>
  25 #include <unistd.h>
  26 #include <errno.h>
  27 #include <dirent.h>
  28 #include <fnmatch.h>
  29
  30 #include "udev.h"
  31
  32 #define PREALLOC_TOKEN                  2048
  33 #define PREALLOC_STRBUF                 32 * 1024
  34 #define PREALLOC_TRIE                   256
  35
  36 struct uid_gid {
  37         unsigned int name_off;
  38         union {
  39                 uid_t   uid;
  40                 gid_t   gid;
  41         };
  42 };
  43
  44 struct trie_child {
  45         unsigned int next_idx;
  46         unsigned int node_idx;
  47         unsigned char key;
  48 };
  49
  50 struct trie_node {
  51         unsigned int child_idx;
  52         unsigned int last_child_idx;
  53         unsigned int value_off;
  54         unsigned short value_len;
  55 };
  56
  57 struct udev_rules {
  58         struct udev *udev;
  59         int resolve_names;
  60
  61         /* every key in the rules file becomes a token */
  62         struct token *tokens;
  63         unsigned int token_cur;
  64         unsigned int token_max;
  65
  66         /* all key strings are copied to a single string buffer */
  67         char *buf;
  68         size_t buf_cur;
  69         size_t buf_max;
  70         unsigned int buf_count;
  71
  72         /* during rule parsing, strings are indexed to find duplicates */
  73         unsigned int *trie_root;
  74         struct trie_node *trie_nodes;
  75         unsigned int trie_nodes_cur;
  76         unsigned int trie_nodes_max;
  77         struct trie_child *trie_childs;
  78         unsigned int trie_childs_cur;
  79         unsigned int trie_childs_max;
  80
  81         /* during rule parsing, uid/gid lookup results are cached */
  82         struct uid_gid *uids;
  83         unsigned int uids_cur;
  84         unsigned int uids_max;
  85         struct uid_gid *gids;
  86         unsigned int gids_cur;
  87         unsigned int gids_max;
  88 };
  89
  90 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
  91 enum operation_type {
  92         OP_UNSET,
  93
  94         OP_MATCH,
  95         OP_NOMATCH,
  96         OP_MATCH_MAX,
  97
  98         OP_ADD,
  99         OP_ASSIGN,
 100         OP_ASSIGN_FINAL,
 101 };
 102
 103 enum string_glob_type {
 104         GL_UNSET,
 105         GL_PLAIN,                       /* no special chars */
 106         GL_GLOB,                        /* shell globs ?,*,[] */
 107         GL_SPLIT,                       /* multi-value A|B */
 108         GL_SPLIT_GLOB,                  /* multi-value with glob A*|B* */
 109         GL_SOMETHING,                   /* commonly used "?*" */
 110         GL_FORMAT,
 111 };
 112
 113 /* tokens of a rule are sorted/handled in this order */
 114 enum token_type {
 115         TK_UNSET,
 116         TK_RULE,
 117
 118         TK_M_ACTION,                    /* val */
 119         TK_M_DEVPATH,                   /* val */
 120         TK_M_KERNEL,                    /* val */
 121         TK_M_DEVLINK,                   /* val */
 122         TK_M_NAME,                      /* val */
 123         TK_M_ENV,                       /* val, attr */
 124         TK_M_SUBSYSTEM,                 /* val */
 125         TK_M_DRIVER,                    /* val */
 126         TK_M_WAITFOR,                   /* val */
 127         TK_M_ATTR,                      /* val, attr */
 128
 129         TK_M_PARENTS_MIN,
 130         TK_M_KERNELS,                   /* val */
 131         TK_M_SUBSYSTEMS,                /* val */
 132         TK_M_DRIVERS,                   /* val */
 133         TK_M_ATTRS,                     /* val, attr */
 134         TK_M_PARENTS_MAX,
 135
 136         TK_M_TEST,                      /* val, mode_t */
 137         TK_M_PROGRAM,                   /* val */
 138         TK_M_IMPORT_FILE,               /* val */
 139         TK_M_IMPORT_PROG,               /* val */
 140         TK_M_IMPORT_PARENT,             /* val */
 141         TK_M_RESULT,                    /* val */
 142         TK_M_MAX,
 143
 144         TK_A_IGNORE_DEVICE,
 145         TK_A_STRING_ESCAPE_NONE,
 146         TK_A_STRING_ESCAPE_REPLACE,
 147         TK_A_NUM_FAKE_PART,             /* int */
 148         TK_A_DEVLINK_PRIO,              /* int */
 149         TK_A_OWNER,                     /* val */
 150         TK_A_GROUP,                     /* val */
 151         TK_A_MODE,                      /* val */
 152         TK_A_OWNER_ID,                  /* uid_t */
 153         TK_A_GROUP_ID,                  /* gid_t */
 154         TK_A_MODE_ID,                   /* mode_t */
 155         TK_A_ENV,                       /* val, attr */
 156         TK_A_NAME,                      /* val */
 157         TK_A_DEVLINK,                   /* val */
 158         TK_A_EVENT_TIMEOUT,             /* int */
 159         TK_A_IGNORE_REMOVE,
 160         TK_A_ATTR,                      /* val, attr */
 161         TK_A_RUN,                       /* val, bool */
 162         TK_A_GOTO,                      /* size_t */
 163         TK_A_LAST_RULE,
 164
 165         TK_END,
 166 };
 167
 168 /* we try to pack stuff in a way that we take only 12 bytes per token */
 169 struct token {
 170         union {
 171                 unsigned char type;             /* same as in rule and key */
 172                 struct {
 173                         unsigned char type;
 174                         unsigned char flags;
 175                         unsigned short token_count;
 176                         unsigned int label_off;
 177                         unsigned short filename_off;
 178                         unsigned short filename_line;
 179                 } rule;
 180                 struct {
 181                         unsigned char type;
 182                         unsigned char flags;
 183                         unsigned char op;
 184                         unsigned char glob;
 185                         unsigned int value_off;
 186                         union {
 187                                 unsigned int attr_off;
 188                                 int ignore_error;
 189                                 int i;
 190                                 unsigned int rule_goto;
 191                                 mode_t  mode;
 192                                 uid_t uid;
 193                                 gid_t gid;
 194                                 int num_fake_part;
 195                                 int devlink_prio;
 196                                 int event_timeout;
 197                         };
 198                 } key;
 199         };
 200 };
 201
 202 #define MAX_TK          64
 203 struct rule_tmp {
 204         struct udev_rules *rules;
 205         struct token rule;
 206         struct token token[MAX_TK];
 207         unsigned int token_cur;
 208 };
 209
 210 #ifdef DEBUG
 211 static const char *operation_str(enum operation_type type)
 212 {
 213         static const char *operation_strs[] = {
 214                 [OP_UNSET] =            "UNSET",
 215                 [OP_MATCH] =            "match",
 216                 [OP_NOMATCH] =          "nomatch",
 217                 [OP_MATCH_MAX] =        "MATCH_MAX",
 218
 219                 [OP_ADD] =              "add",
 220                 [OP_ASSIGN] =           "assign",
 221                 [OP_ASSIGN_FINAL] =     "assign-final",
 222 }       ;
 223
 224         return operation_strs[type];
 225 }
 226
 227 static const char *string_glob_str(enum string_glob_type type)
 228 {
 229         static const char *string_glob_strs[] = {
 230                 [GL_UNSET] =            "UNSET",
 231                 [GL_PLAIN] =            "plain",
 232                 [GL_GLOB] =             "glob",
 233                 [GL_SPLIT] =            "split",
 234                 [GL_SPLIT_GLOB] =       "split-glob",
 235                 [GL_SOMETHING] =        "split-glob",
 236                 [GL_FORMAT] =           "format",
 237         };
 238
 239         return string_glob_strs[type];
 240 }
 241
 242 static const char *token_str(enum token_type type)
 243 {
 244         static const char *token_strs[] = {
 245                 [TK_UNSET] =                    "UNSET",
 246                 [TK_RULE] =                     "RULE",
 247
 248                 [TK_M_ACTION] =                 "M ACTION",
 249                 [TK_M_DEVPATH] =                "M DEVPATH",
 250                 [TK_M_KERNEL] =                 "M KERNEL",
 251                 [TK_M_DEVLINK] =                "M DEVLINK",
 252                 [TK_M_NAME] =                   "M NAME",
 253                 [TK_M_ENV] =                    "M ENV",
 254                 [TK_M_SUBSYSTEM] =              "M SUBSYSTEM",
 255                 [TK_M_DRIVER] =                 "M DRIVER",
 256                 [TK_M_WAITFOR] =                "M WAITFOR",
 257                 [TK_M_ATTR] =                   "M ATTR",
 258
 259                 [TK_M_PARENTS_MIN] =            "M PARENTS_MIN",
 260                 [TK_M_KERNELS] =                "M KERNELS",
 261                 [TK_M_SUBSYSTEMS] =             "M SUBSYSTEMS",
 262                 [TK_M_DRIVERS] =                "M DRIVERS",
 263                 [TK_M_ATTRS] =                  "M ATTRS",
 264                 [TK_M_PARENTS_MAX] =            "M PARENTS_MAX",
 265
 266                 [TK_M_TEST] =                   "M TEST",
 267                 [TK_M_PROGRAM] =                "M PROGRAM",
 268                 [TK_M_IMPORT_FILE] =            "M IMPORT_FILE",
 269                 [TK_M_IMPORT_PROG] =            "M IMPORT_PROG",
 270                 [TK_M_IMPORT_PARENT] =          "M MPORT_PARENT",
 271                 [TK_M_RESULT] =                 "M RESULT",
 272                 [TK_M_MAX] =                    "M MAX",
 273
 274                 [TK_A_IGNORE_DEVICE] =          "A IGNORE_DEVICE",
 275                 [TK_A_STRING_ESCAPE_NONE] =     "A STRING_ESCAPE_NONE",
 276                 [TK_A_STRING_ESCAPE_REPLACE] =  "A STRING_ESCAPE_REPLACE",
 277                 [TK_A_NUM_FAKE_PART] =          "A NUM_FAKE_PART",
 278                 [TK_A_DEVLINK_PRIO] =           "A DEVLINK_PRIO",
 279                 [TK_A_OWNER] =                  "A OWNER",
 280                 [TK_A_GROUP] =                  "A GROUP",
 281                 [TK_A_MODE] =                   "A MODE",
 282                 [TK_A_OWNER_ID] =               "A OWNER_ID",
 283                 [TK_A_GROUP_ID] =               "A GROUP_ID",
 284                 [TK_A_MODE_ID] =                "A MODE_ID",
 285                 [TK_A_ENV] =                    "A ENV",
 286                 [TK_A_NAME] =                   "A NAME",
 287                 [TK_A_DEVLINK] =                "A DEVLINK",
 288                 [TK_A_EVENT_TIMEOUT] =          "A EVENT_TIMEOUT",
 289                 [TK_A_IGNORE_REMOVE] =          "A IGNORE_REMOVE",
 290                 [TK_A_ATTR] =                   "A ATTR",
 291                 [TK_A_RUN] =                    "A RUN",
 292                 [TK_A_GOTO] =                   "A GOTO",
 293                 [TK_A_LAST_RULE] =              "A LAST_RULE",
 294
 295                 [TK_END] =                      "END",
 296         };
 297
 298         return token_strs[type];
 299 }
 300
 301 static void dump_token(struct udev_rules *rules, struct token *token)
 302 {
 303         enum token_type type = token->type;
 304         enum operation_type op = token->key.op;
 305         enum string_glob_type glob = token->key.glob;
 306         const char *value = &rules->buf[token->key.value_off];
 307         const char *attr = &rules->buf[token->key.attr_off];
 308
 309         switch (type) {
 310         case TK_RULE:
 311                 {
 312                         const char *tks_ptr = (char *)rules->tokens;
 313                         const char *tk_ptr = (char *)token;
 314                         unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
 315
 316                         dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
 317                             &rules->buf[token->rule.filename_off], token->rule.filename_line,
 318                             idx, token->rule.token_count,
 319                             &rules->buf[token->rule.label_off],
 320                             token->rule.flags);
 321                         break;
 322                 }
 323         case TK_M_ACTION:
 324         case TK_M_DEVPATH:
 325         case TK_M_KERNEL:
 326         case TK_M_SUBSYSTEM:
 327         case TK_M_DRIVER:
 328         case TK_M_WAITFOR:
 329         case TK_M_DEVLINK:
 330         case TK_M_NAME:
 331         case TK_M_KERNELS:
 332         case TK_M_SUBSYSTEMS:
 333         case TK_M_DRIVERS:
 334         case TK_M_PROGRAM:
 335         case TK_M_IMPORT_FILE:
 336         case TK_M_IMPORT_PROG:
 337         case TK_M_IMPORT_PARENT:
 338         case TK_M_RESULT:
 339         case TK_A_NAME:
 340         case TK_A_DEVLINK:
 341         case TK_A_OWNER:
 342         case TK_A_GROUP:
 343         case TK_A_MODE:
 344         case TK_A_RUN:
 345                 dbg(rules->udev, "%s %s '%s'(%s)\n",
 346                     token_str(type), operation_str(op), value, string_glob_str(glob));
 347                 break;
 348         case TK_M_ATTR:
 349         case TK_M_ATTRS:
 350         case TK_M_ENV:
 351         case TK_A_ATTR:
 352         case TK_A_ENV:
 353                 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
 354                     token_str(type), operation_str(op), attr, value, string_glob_str(glob));
 355                 break;
 356         case TK_A_IGNORE_DEVICE:
 357         case TK_A_STRING_ESCAPE_NONE:
 358         case TK_A_STRING_ESCAPE_REPLACE:
 359         case TK_A_LAST_RULE:
 360         case TK_A_IGNORE_REMOVE:
 361                 dbg(rules->udev, "%s\n", token_str(type));
 362                 break;
 363         case TK_M_TEST:
 364                 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
 365                     token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
 366                 break;
 367         case TK_A_NUM_FAKE_PART:
 368                 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
 369                 break;
 370         case TK_A_DEVLINK_PRIO:
 371                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
 372                 break;
 373         case TK_A_OWNER_ID:
 374                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
 375                 break;
 376         case TK_A_GROUP_ID:
 377                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
 378                 break;
 379         case TK_A_MODE_ID:
 380                 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
 381                 break;
 382         case TK_A_EVENT_TIMEOUT:
 383                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
 384                 break;
 385         case TK_A_GOTO:
 386                 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
 387                 break;
 388         case TK_END:
 389                 dbg(rules->udev, "* %s\n", token_str(type));
 390                 break;
 391         case TK_M_PARENTS_MIN:
 392         case TK_M_PARENTS_MAX:
 393         case TK_M_MAX:
 394         case TK_UNSET:
 395                 dbg(rules->udev, "unknown type %u\n", type);
 396                 break;
 397         }
 398 }
 399
 400 static void dump_rules(struct udev_rules *rules)
 401 {
 402         unsigned int i;
 403
 404         dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
 405             rules->token_cur,
 406             rules->token_cur * sizeof(struct token),
 407             rules->buf_count,
 408             rules->buf_cur);
 409         for(i = 0; i < rules->token_cur; i++)
 410                 dump_token(rules, &rules->tokens[i]);
 411 }
 412 #else
 413 static inline const char *operation_str(enum operation_type type) { return NULL; }
 414 static inline const char *token_str(enum token_type type) { return NULL; }
 415 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
 416 static inline void dump_rules(struct udev_rules *rules) {}
 417 #endif /* DEBUG */
 418
 419 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
 420 {
 421         int off;
 422
 423         /* grow buffer if needed */
 424         if (rules->buf_cur + bytes+1 >= rules->buf_max) {
 425                 char *buf;
 426                 unsigned int add;
 427
 428                 /* double the buffer size */
 429                 add = rules->buf_max;
 430                 if (add < bytes * 8)
 431                         add = bytes * 8;
 432
 433                 buf = realloc(rules->buf, rules->buf_max + add);
 434                 if (buf == NULL)
 435                         return -1;
 436                 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
 437                 rules->buf = buf;
 438                 rules->buf_max += add;
 439         }
 440         off = rules->buf_cur;
 441         memcpy(&rules->buf[rules->buf_cur], str, bytes);
 442         rules->buf_cur += bytes;
 443         rules->buf_count++;
 444         return off;
 445 }
 446
 447 static int add_string(struct udev_rules *rules, const char *str)
 448 {
 449         unsigned int node_idx;
 450         struct trie_node *new_node;
 451         unsigned int new_node_idx;
 452         unsigned char key;
 453         unsigned short len;
 454         unsigned int depth;
 455         unsigned int off;
 456
 457         len = strlen(str);
 458
 459         /* offset 0 is always '\0' */
 460         if (len == 0)
 461                 return 0;
 462
 463         /* descend root - start from last character of str */
 464         key = str[len - 1];
 465         node_idx = rules->trie_root[key];
 466         depth = 0;
 467
 468         /* descend suffix trie */
 469         if (node_idx > 0) {
 470                 while (1) {
 471                         struct trie_node *node;
 472                         unsigned int child_idx;
 473
 474                         node = &rules->trie_nodes[node_idx];
 475                         depth++;
 476                         off = node->value_off + node->value_len - len;
 477
 478                         /* match against current node */
 479                         if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
 480                                 return off;
 481
 482                         /* lookup child node */
 483                         key = str[len - 1 - depth];
 484                         child_idx = node->child_idx;
 485                         while (child_idx > 0) {
 486                                 if (rules->trie_childs[child_idx].key == key)
 487                                         break;
 488                                 child_idx = rules->trie_childs[child_idx].next_idx;
 489                         }
 490                         if (child_idx == 0)
 491                                 break;
 492                         node_idx = rules->trie_childs[child_idx].node_idx;
 493                 }
 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         /* grow trie childs if needed */
 519         if (rules->trie_childs_cur >= rules->trie_childs_max) {
 520                 struct trie_child *childs;
 521                 unsigned int add;
 522
 523                 /* double the buffer size */
 524                 add = rules->trie_childs_max;
 525                 if (add < 8)
 526                         add = 8;
 527
 528                 childs = realloc(rules->trie_childs, (rules->trie_childs_max + add) * sizeof(struct trie_child));
 529                 if (childs == NULL)
 530                         return -1;
 531                 dbg(rules->udev, "extend trie childs from %u to %u\n",
 532                     rules->trie_childs_max, rules->trie_childs_max + add);
 533                 rules->trie_childs = childs;
 534                 rules->trie_childs_max += add;
 535         }
 536
 537         /* get new node */
 538         new_node_idx = rules->trie_nodes_cur;
 539         rules->trie_nodes_cur++;
 540         new_node = &rules->trie_nodes[new_node_idx];
 541         new_node->value_off = off;
 542         new_node->value_len = len;
 543         new_node->child_idx = 0;
 544         new_node->last_child_idx = 0;
 545
 546         if (depth == 0) {
 547                 /* add node to root */
 548                 rules->trie_root[key] = new_node_idx;
 549         } else {
 550                 /* add node to parent */
 551                 struct trie_node *parent;
 552                 struct trie_child *new_child;
 553                 unsigned int new_child_idx;
 554
 555                 /* get new child link for list of childs of parent */
 556                 new_child_idx = rules->trie_childs_cur;
 557                 rules->trie_childs_cur++;
 558                 new_child = &rules->trie_childs[new_child_idx];
 559                 new_child->next_idx = 0;
 560                 new_child->node_idx = new_node_idx;
 561                 new_child->key = key;
 562
 563                 /* append child link to list of childs of parent */
 564                 parent = &rules->trie_nodes[node_idx];
 565                 if (parent->child_idx == 0) {
 566                         parent->child_idx = new_child_idx;
 567                 } else {
 568                         struct trie_child *last_child;
 569
 570                         last_child = &rules->trie_childs[parent->last_child_idx];
 571                         last_child->next_idx = new_child_idx;
 572                 }
 573                 parent->last_child_idx = new_child_idx;
 574         }
 575         return off;
 576 }
 577
 578 static int add_token(struct udev_rules *rules, struct token *token)
 579 {
 580         /* grow buffer if needed */
 581         if (rules->token_cur+1 >= rules->token_max) {
 582                 struct token *tokens;
 583                 unsigned int add;
 584
 585                 /* double the buffer size */
 586                 add = rules->token_max;
 587                 if (add < 8)
 588                         add = 8;
 589
 590                 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
 591                 if (tokens == NULL)
 592                         return -1;
 593                 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
 594                 rules->tokens = tokens;
 595                 rules->token_max += add;
 596         }
 597         memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
 598         rules->token_cur++;
 599         return 0;
 600 }
 601
 602 static uid_t add_uid(struct udev_rules *rules, const char *owner)
 603 {
 604         unsigned int i;
 605         uid_t uid;
 606         unsigned int off;
 607
 608         /* lookup, if we know it already */
 609         for (i = 0; i < rules->uids_cur; i++) {
 610                 off = rules->uids[i].name_off;
 611                 if (strcmp(&rules->buf[off], owner) == 0) {
 612                         uid = rules->uids[i].uid;
 613                         dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
 614                         return uid;
 615                 }
 616         }
 617         uid = util_lookup_user(rules->udev, owner);
 618
 619         /* grow buffer if needed */
 620         if (rules->uids_cur+1 >= rules->uids_max) {
 621                 struct uid_gid *uids;
 622                 unsigned int add;
 623
 624                 /* double the buffer size */
 625                 add = rules->uids_max;
 626                 if (add < 1)
 627                         add = 8;
 628
 629                 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
 630                 if (uids == NULL)
 631                         return uid;
 632                 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
 633                 rules->uids = uids;
 634                 rules->uids_max += add;
 635         }
 636         rules->uids[rules->uids_cur].uid = uid;
 637         off = add_string(rules, owner);
 638         if (off <= 0)
 639                 return uid;
 640         rules->uids[rules->uids_cur].name_off = off;
 641         rules->uids_cur++;
 642         return uid;
 643 }
 644
 645 static gid_t add_gid(struct udev_rules *rules, const char *group)
 646 {
 647         unsigned int i;
 648         gid_t gid;
 649         unsigned int off;
 650
 651         /* lookup, if we know it already */
 652         for (i = 0; i < rules->gids_cur; i++) {
 653                 off = rules->gids[i].name_off;
 654                 if (strcmp(&rules->buf[off], group) == 0) {
 655                         gid = rules->gids[i].gid;
 656                         dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
 657                         return gid;
 658                 }
 659         }
 660         gid = util_lookup_group(rules->udev, group);
 661
 662         /* grow buffer if needed */
 663         if (rules->gids_cur+1 >= rules->gids_max) {
 664                 struct uid_gid *gids;
 665                 unsigned int add;
 666
 667                 /* double the buffer size */
 668                 add = rules->gids_max;
 669                 if (add < 1)
 670                         add = 8;
 671
 672                 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
 673                 if (gids == NULL)
 674                         return gid;
 675                 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
 676                 rules->gids = gids;
 677                 rules->gids_max += add;
 678         }
 679         rules->gids[rules->gids_cur].gid = gid;
 680         off = add_string(rules, group);
 681         if (off <= 0)
 682                 return gid;
 683         rules->gids[rules->gids_cur].name_off = off;
 684         rules->gids_cur++;
 685         return gid;
 686 }
 687
 688 static int import_property_from_string(struct udev_device *dev, char *line)
 689 {
 690         struct udev *udev = udev_device_get_udev(dev);
 691         char *key;
 692         char *val;
 693         size_t len;
 694
 695         /* find key */
 696         key = line;
 697         while (isspace(key[0]))
 698                 key++;
 699
 700         /* comment or empty line */
 701         if (key[0] == '#' || key[0] == '\0')
 702                 return -1;
 703
 704         /* split key/value */
 705         val = strchr(key, '=');
 706         if (val == NULL)
 707                 return -1;
 708         val[0] = '\0';
 709         val++;
 710
 711         /* find value */
 712         while (isspace(val[0]))
 713                 val++;
 714
 715         /* terminate key */
 716         len = strlen(key);
 717         if (len == 0)
 718                 return -1;
 719         while (isspace(key[len-1]))
 720                 len--;
 721         key[len] = '\0';
 722
 723         /* terminate value */
 724         len = strlen(val);
 725         if (len == 0)
 726                 return -1;
 727         while (isspace(val[len-1]))
 728                 len--;
 729         val[len] = '\0';
 730
 731         if (len == 0)
 732                 return -1;
 733
 734         /* unquote */
 735         if (val[0] == '"' || val[0] == '\'') {
 736                 if (val[len-1] != val[0]) {
 737                         info(udev, "inconsistent quoting: '%s', skip\n", line);
 738                         return -1;
 739                 }
 740                 val[len-1] = '\0';
 741                 val++;
 742         }
 743
 744         dbg(udev, "adding '%s'='%s'\n", key, val);
 745
 746         /* handle device, renamed by external tool, returning new path */
 747         if (strcmp(key, "DEVPATH") == 0) {
 748                 char syspath[UTIL_PATH_SIZE];
 749
 750                 info(udev, "updating devpath from '%s' to '%s'\n",
 751                      udev_device_get_devpath(dev), val);
 752                 util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
 753                 util_strlcat(syspath, val, sizeof(syspath));
 754                 udev_device_set_syspath(dev, syspath);
 755         } else {
 756                 struct udev_list_entry *entry;
 757
 758                 entry = udev_device_add_property(dev, key, val);
 759                 /* store in db */
 760                 udev_list_entry_set_flag(entry, 1);
 761         }
 762         return 0;
 763 }
 764
 765 static int import_file_into_properties(struct udev_device *dev, const char *filename)
 766 {
 767         FILE *f;
 768         char line[UTIL_LINE_SIZE];
 769
 770         f = fopen(filename, "r");
 771         if (f == NULL)
 772                 return -1;
 773         while (fgets(line, sizeof(line), f) != NULL)
 774                 import_property_from_string(dev, line);
 775         fclose(f);
 776         return 0;
 777 }
 778
 779 static int import_program_into_properties(struct udev_device *dev, const char *program)
 780 {
 781         struct udev *udev = udev_device_get_udev(dev);
 782         char **envp;
 783         char result[2048];
 784         size_t reslen;
 785         char *line;
 786
 787         envp = udev_device_get_properties_envp(dev);
 788         if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
 789                 return -1;
 790
 791         line = result;
 792         while (line != NULL) {
 793                 char *pos;
 794
 795                 pos = strchr(line, '\n');
 796                 if (pos != NULL) {
 797                         pos[0] = '\0';
 798                         pos = &pos[1];
 799                 }
 800                 import_property_from_string(dev, line);
 801                 line = pos;
 802         }
 803         return 0;
 804 }
 805
 806 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
 807 {
 808         struct udev *udev = udev_device_get_udev(dev);
 809         struct udev_device *dev_parent;
 810         struct udev_list_entry *list_entry;
 811
 812         dev_parent = udev_device_get_parent(dev);
 813         if (dev_parent == NULL)
 814                 return -1;
 815
 816         dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
 817         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
 818                 const char *key = udev_list_entry_get_name(list_entry);
 819                 const char *val = udev_list_entry_get_value(list_entry);
 820
 821                 if (fnmatch(filter, key, 0) == 0) {
 822                         struct udev_list_entry *entry;
 823
 824                         dbg(udev, "import key '%s=%s'\n", key, val);
 825                         entry = udev_device_add_property(dev, key, val);
 826                         /* store in db */
 827                         udev_list_entry_set_flag(entry, 1);
 828                 }
 829         }
 830         return 0;
 831 }
 832
 833 #define WAIT_LOOP_PER_SECOND            50
 834 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
 835 {
 836         struct udev *udev = udev_device_get_udev(dev);
 837         char filepath[UTIL_PATH_SIZE];
 838         char devicepath[UTIL_PATH_SIZE];
 839         struct stat stats;
 840         int loop = timeout * WAIT_LOOP_PER_SECOND;
 841
 842         /* a relative path is a device attribute */
 843         devicepath[0] = '\0';
 844         if (file[0] != '/') {
 845                 util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath));
 846                 util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath));
 847
 848                 util_strlcpy(filepath, devicepath, sizeof(filepath));
 849                 util_strlcat(filepath, "/", sizeof(filepath));
 850                 util_strlcat(filepath, file, sizeof(filepath));
 851                 file = filepath;
 852         }
 853
 854         dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
 855         while (--loop) {
 856                 /* lookup file */
 857                 if (stat(file, &stats) == 0) {
 858                         info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
 859                         return 0;
 860                 }
 861                 /* make sure, the device did not disappear in the meantime */
 862                 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
 863                         info(udev, "device disappeared while waiting for '%s'\n", file);
 864                         return -2;
 865                 }
 866                 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
 867                 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
 868         }
 869         info(udev, "waiting for '%s' failed\n", file);
 870         return -1;
 871 }
 872
 873 static int attr_subst_subdir(char *attr, size_t len)
 874 {
 875         char *pos;
 876         int found = 0;
 877
 878         pos = strstr(attr, "/*/");
 879         if (pos != NULL) {
 880                 char str[UTIL_PATH_SIZE];
 881                 DIR *dir;
 882
 883                 pos[1] = '\0';
 884                 util_strlcpy(str, &pos[2], sizeof(str));
 885                 dir = opendir(attr);
 886                 if (dir != NULL) {
 887                         struct dirent *dent;
 888
 889                         for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 890                                 struct stat stats;
 891
 892                                 if (dent->d_name[0] == '.')
 893                                         continue;
 894                                 util_strlcat(attr, dent->d_name, len);
 895                                 util_strlcat(attr, str, len);
 896                                 if (stat(attr, &stats) == 0) {
 897                                         found = 1;
 898                                         break;
 899                                 }
 900                                 pos[1] = '\0';
 901                         }
 902                         closedir(dir);
 903                 }
 904                 if (!found)
 905                         util_strlcat(attr, str, len);
 906         }
 907
 908         return found;
 909 }
 910
 911 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
 912 {
 913         char *linepos;
 914         char *temp;
 915
 916         linepos = *line;
 917         if (linepos == NULL && linepos[0] == '\0')
 918                 return -1;
 919
 920         /* skip whitespace */
 921         while (isspace(linepos[0]) || linepos[0] == ',')
 922                 linepos++;
 923
 924         /* get the key */
 925         if (linepos[0] == '\0')
 926                 return -1;
 927         *key = linepos;
 928
 929         while (1) {
 930                 linepos++;
 931                 if (linepos[0] == '\0')
 932                         return -1;
 933                 if (isspace(linepos[0]))
 934                         break;
 935                 if (linepos[0] == '=')
 936                         break;
 937                 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
 938                         if (linepos[1] == '=')
 939                                 break;
 940         }
 941
 942         /* remember end of key */
 943         temp = linepos;
 944
 945         /* skip whitespace after key */
 946         while (isspace(linepos[0]))
 947                 linepos++;
 948         if (linepos[0] == '\0')
 949                 return -1;
 950
 951         /* get operation type */
 952         if (linepos[0] == '=' && linepos[1] == '=') {
 953                 *op = OP_MATCH;
 954                 linepos += 2;
 955         } else if (linepos[0] == '!' && linepos[1] == '=') {
 956                 *op = OP_NOMATCH;
 957                 linepos += 2;
 958         } else if (linepos[0] == '+' && linepos[1] == '=') {
 959                 *op = OP_ADD;
 960                 linepos += 2;
 961         } else if (linepos[0] == '=') {
 962                 *op = OP_ASSIGN;
 963                 linepos++;
 964         } else if (linepos[0] == ':' && linepos[1] == '=') {
 965                 *op = OP_ASSIGN_FINAL;
 966                 linepos += 2;
 967         } else
 968                 return -1;
 969
 970         /* terminate key */
 971         temp[0] = '\0';
 972
 973         /* skip whitespace after operator */
 974         while (isspace(linepos[0]))
 975                 linepos++;
 976         if (linepos[0] == '\0')
 977                 return -1;
 978
 979         /* get the value */
 980         if (linepos[0] == '"')
 981                 linepos++;
 982         else
 983                 return -1;
 984         *value = linepos;
 985
 986         /* terminate */
 987         temp = strchr(linepos, '"');
 988         if (!temp)
 989                 return -1;
 990         temp[0] = '\0';
 991         temp++;
 992         dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
 993
 994         /* move line to next key */
 995         *line = temp;
 996         return 0;
 997 }
 998
 999 /* extract possible KEY{attr} */
1000 static char *get_key_attribute(struct udev *udev, char *str)
1001 {
1002         char *pos;
1003         char *attr;
1004
1005         attr = strchr(str, '{');
1006         if (attr != NULL) {
1007                 attr++;
1008                 pos = strchr(attr, '}');
1009                 if (pos == NULL) {
1010                         err(udev, "missing closing brace for format\n");
1011                         return NULL;
1012                 }
1013                 pos[0] = '\0';
1014                 dbg(udev, "attribute='%s'\n", attr);
1015                 return attr;
1016         }
1017         return NULL;
1018 }
1019
1020 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
1021                         enum operation_type op,
1022                         const char *value, const void *data)
1023 {
1024         struct token *token = &rule_tmp->token[rule_tmp->token_cur];
1025         const char *attr = data;
1026         enum string_glob_type glob;
1027
1028         memset(token, 0x00, sizeof(struct token));
1029
1030         switch (type) {
1031         case TK_M_ACTION:
1032         case TK_M_DEVPATH:
1033         case TK_M_KERNEL:
1034         case TK_M_SUBSYSTEM:
1035         case TK_M_DRIVER:
1036         case TK_M_WAITFOR:
1037         case TK_M_DEVLINK:
1038         case TK_M_NAME:
1039         case TK_M_KERNELS:
1040         case TK_M_SUBSYSTEMS:
1041         case TK_M_DRIVERS:
1042         case TK_M_PROGRAM:
1043         case TK_M_IMPORT_FILE:
1044         case TK_M_IMPORT_PROG:
1045         case TK_M_IMPORT_PARENT:
1046         case TK_M_RESULT:
1047         case TK_A_OWNER:
1048         case TK_A_GROUP:
1049         case TK_A_MODE:
1050         case TK_A_NAME:
1051         case TK_A_DEVLINK:
1052         case TK_A_GOTO:
1053                 token->key.value_off = add_string(rule_tmp->rules, value);
1054                 break;
1055         case TK_M_ENV:
1056         case TK_M_ATTR:
1057         case TK_M_ATTRS:
1058         case TK_A_ATTR:
1059         case TK_A_ENV:
1060                 token->key.value_off = add_string(rule_tmp->rules, value);
1061                 token->key.attr_off = add_string(rule_tmp->rules, attr);
1062                 break;
1063         case TK_M_TEST:
1064                 token->key.value_off = add_string(rule_tmp->rules, value);
1065                 if (data != NULL)
1066                         token->key.mode = *(mode_t *)data;
1067                 break;
1068         case TK_A_IGNORE_DEVICE:
1069         case TK_A_STRING_ESCAPE_NONE:
1070         case TK_A_STRING_ESCAPE_REPLACE:
1071         case TK_A_IGNORE_REMOVE:
1072         case TK_A_LAST_RULE:
1073                 break;
1074         case TK_A_RUN:
1075                 token->key.value_off = add_string(rule_tmp->rules, value);
1076                 token->key.ignore_error = *(int *)data;
1077                 break;
1078         case TK_A_NUM_FAKE_PART:
1079                 token->key.num_fake_part = *(int *)data;
1080                 break;
1081         case TK_A_DEVLINK_PRIO:
1082                 token->key.devlink_prio = *(int *)data;
1083                 break;
1084         case TK_A_OWNER_ID:
1085                 token->key.uid = *(uid_t *)data;
1086                 break;
1087         case TK_A_GROUP_ID:
1088                 token->key.gid = *(gid_t *)data;
1089                 break;
1090         case TK_A_MODE_ID:
1091                 token->key.mode = *(mode_t *)data;
1092                 break;
1093         case TK_A_EVENT_TIMEOUT:
1094                 token->key.event_timeout = *(int *)data;
1095                 break;
1096         case TK_RULE:
1097         case TK_M_PARENTS_MIN:
1098         case TK_M_PARENTS_MAX:
1099         case TK_M_MAX:
1100         case TK_END:
1101         case TK_UNSET:
1102                 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1103                 return -1;
1104         }
1105
1106         glob = GL_PLAIN;
1107         if (value != NULL) {
1108                 if (type < TK_M_MAX) {
1109                         /* check if we need to split or call fnmatch() while matching rules */
1110                         int has_split;
1111                         int has_glob;
1112
1113                         has_split = (strchr(value, '|') != NULL);
1114                         has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||
1115                                     strchr(value, '[') != NULL || strchr(value, ']') != NULL);
1116                         if (has_split && has_glob) {
1117                                 glob = GL_SPLIT_GLOB;
1118                         } else if (has_split) {
1119                                 glob = GL_SPLIT;
1120                         } else if (has_glob) {
1121                                 if (strcmp(value, "?*") == 0)
1122                                         glob = GL_SOMETHING;
1123                                 else
1124                                         glob = GL_GLOB;
1125                         }
1126                 } else {
1127                         /* check if we need to substitute format strings for matching rules */
1128                         if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1129                                 glob = GL_FORMAT;
1130                 }
1131         }
1132
1133         token->key.type = type;
1134         token->key.op = op;
1135         token->key.glob = glob;
1136         rule_tmp->token_cur++;
1137         if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1138                 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1139                 return -1;
1140         }
1141         return 0;
1142 }
1143
1144 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1145 {
1146         unsigned int i;
1147         unsigned int start = 0;
1148         unsigned int end = rule_tmp->token_cur;
1149
1150         for (i = 0; i < rule_tmp->token_cur; i++) {
1151                 enum token_type next_val = TK_UNSET;
1152                 unsigned int next_idx;
1153                 unsigned int j;
1154
1155                 /* find smallest value */
1156                 for (j = start; j < end; j++) {
1157                         if (rule_tmp->token[j].type == TK_UNSET)
1158                                 continue;
1159                         if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1160                                 next_val = rule_tmp->token[j].type;
1161                                 next_idx = j;
1162                         }
1163                 }
1164
1165                 /* add token and mark done */
1166                 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1167                         return -1;
1168                 rule_tmp->token[next_idx].type = TK_UNSET;
1169
1170                 /* shrink range */
1171                 if (next_idx == start)
1172                         start++;
1173                 if (next_idx+1 == end)
1174                         end--;
1175         }
1176         return 0;
1177 }
1178
1179 static int add_rule(struct udev_rules *rules, char *line,
1180                     const char *filename, unsigned int filename_off, unsigned int lineno)
1181 {
1182         int valid = 0;
1183         char *linepos;
1184         char *attr;
1185         int physdev = 0;
1186         struct rule_tmp rule_tmp;
1187
1188         memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1189         rule_tmp.rules = rules;
1190         rule_tmp.rule.type = TK_RULE;
1191         rule_tmp.rule.rule.filename_off = filename_off;
1192         rule_tmp.rule.rule.filename_line = lineno;
1193
1194         linepos = line;
1195         while (1) {
1196                 char *key;
1197                 char *value;
1198                 enum operation_type op;
1199
1200                 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1201                         break;
1202
1203                 if (strcasecmp(key, "ACTION") == 0) {
1204                         if (op > OP_MATCH_MAX) {
1205                                 err(rules->udev, "invalid ACTION operation\n");
1206                                 goto invalid;
1207                         }
1208                         rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1209                         valid = 1;
1210                         continue;
1211                 }
1212
1213                 if (strcasecmp(key, "DEVPATH") == 0) {
1214                         if (op > OP_MATCH_MAX) {
1215                                 err(rules->udev, "invalid DEVPATH operation\n");
1216                                 goto invalid;
1217                         }
1218                         rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1219                         valid = 1;
1220                         continue;
1221                 }
1222
1223                 if (strcasecmp(key, "KERNEL") == 0) {
1224                         if (op > OP_MATCH_MAX) {
1225                                 err(rules->udev, "invalid KERNEL operation\n");
1226                                 goto invalid;
1227                         }
1228                         rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1229                         valid = 1;
1230                         continue;
1231                 }
1232
1233                 if (strcasecmp(key, "SUBSYSTEM") == 0) {
1234                         if (op > OP_MATCH_MAX) {
1235                                 err(rules->udev, "invalid SUBSYSTEM operation\n");
1236                                 goto invalid;
1237                         }
1238                         /* bus, class, subsystem events should all be the same */
1239                         if (strcmp(value, "subsystem") == 0 ||
1240                             strcmp(value, "bus") == 0 ||
1241                             strcmp(value, "class") == 0) {
1242                                 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1243                                         err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1244                                             "please fix it in %s:%u", value, filename, lineno);
1245                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1246                         } else
1247                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1248                         valid = 1;
1249                         continue;
1250                 }
1251
1252                 if (strcasecmp(key, "DRIVER") == 0) {
1253                         if (op > OP_MATCH_MAX) {
1254                                 err(rules->udev, "invalid DRIVER operation\n");
1255                                 goto invalid;
1256                         }
1257                         rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1258                         valid = 1;
1259                         continue;
1260                 }
1261
1262                 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1263                         attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1264                         if (attr == NULL) {
1265                                 err(rules->udev, "error parsing ATTR attribute\n");
1266                                 goto invalid;
1267                         }
1268                         if (op < OP_MATCH_MAX) {
1269                                 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1270                         } else {
1271                                 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1272                         }
1273                         valid = 1;
1274                         continue;
1275                 }
1276
1277                 if (strcasecmp(key, "KERNELS") == 0 ||
1278                     strcasecmp(key, "ID") == 0) {
1279                         if (op > OP_MATCH_MAX) {
1280                                 err(rules->udev, "invalid KERNELS operation\n");
1281                                 goto invalid;
1282                         }
1283                         rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1284                         valid = 1;
1285                         continue;
1286                 }
1287
1288                 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
1289                     strcasecmp(key, "BUS") == 0) {
1290                         if (op > OP_MATCH_MAX) {
1291                                 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1292                                 goto invalid;
1293                         }
1294                         rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1295                         valid = 1;
1296                         continue;
1297                 }
1298
1299                 if (strcasecmp(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                         valid = 1;
1306                         continue;
1307                 }
1308
1309                 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1310                     strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1311                         if (op > OP_MATCH_MAX) {
1312                                 err(rules->udev, "invalid ATTRS operation\n");
1313                                 goto invalid;
1314                         }
1315                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1316                         if (attr == NULL) {
1317                                 err(rules->udev, "error parsing ATTRS attribute\n");
1318                                 goto invalid;
1319                         }
1320                         if (strncmp(attr, "device/", 7) == 0)
1321                                 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1322                                     "please fix it in %s:%u", filename, lineno);
1323                         else if (strstr(attr, "../") != NULL)
1324                                 err(rules->udev, "do not reference parent sysfs directories directly, "
1325                                     "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1326                         rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1327                         valid = 1;
1328                         continue;
1329                 }
1330
1331                 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1332                         attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1333                         if (attr == NULL) {
1334                                 err(rules->udev, "error parsing ENV attribute\n");
1335                                 goto invalid;
1336                         }
1337                         if (strncmp(attr, "PHYSDEV", 7) == 0)
1338                                 physdev = 1;
1339                         if (op < OP_MATCH_MAX) {
1340                                 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1341                                         goto invalid;
1342                         } else {
1343                                 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1344                                         goto invalid;
1345                         }
1346                         valid = 1;
1347                         continue;
1348                 }
1349
1350                 if (strcasecmp(key, "PROGRAM") == 0) {
1351                         rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1352                         valid = 1;
1353                         continue;
1354                 }
1355
1356                 if (strcasecmp(key, "RESULT") == 0) {
1357                         if (op > OP_MATCH_MAX) {
1358                                 err(rules->udev, "invalid RESULT operation\n");
1359                                 goto invalid;
1360                         }
1361                         rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1362                         valid = 1;
1363                         continue;
1364                 }
1365
1366                 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1367                         attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1368                         if (attr != NULL && strstr(attr, "program")) {
1369                                 dbg(rules->udev, "IMPORT will be executed\n");
1370                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1371                                 valid = 1;
1372                         } else if (attr != NULL && strstr(attr, "file")) {
1373                                 dbg(rules->udev, "IMPORT will be included as file\n");
1374                                 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1375                                 valid = 1;
1376                         } else if (attr != NULL && strstr(attr, "parent")) {
1377                                 dbg(rules->udev, "IMPORT will include the parent values\n");
1378                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1379                                 valid = 1;
1380                         } else {
1381                                 /* figure it out if it is executable */
1382                                 char file[UTIL_PATH_SIZE];
1383                                 char *pos;
1384                                 struct stat statbuf;
1385
1386                                 util_strlcpy(file, value, sizeof(file));
1387                                 pos = strchr(file, ' ');
1388                                 if (pos)
1389                                         pos[0] = '\0';
1390
1391                                 /* allow programs in /lib/udev called without the path */
1392                                 if (strchr(file, '/') == NULL) {
1393                                         util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));
1394                                         util_strlcat(file, value, sizeof(file));
1395                                         pos = strchr(file, ' ');
1396                                         if (pos)
1397                                                 pos[0] = '\0';
1398                                 }
1399
1400                                 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1401                                 if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
1402                                         dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1403                                         rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1404                                         valid = 1;
1405                                 } else {
1406                                         dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1407                                         rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1408                                         valid = 1;
1409                                 }
1410                         }
1411                         continue;
1412                 }
1413
1414                 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1415                         mode_t mode = 0;
1416
1417                         if (op > OP_MATCH_MAX) {
1418                                 err(rules->udev, "invalid TEST operation\n");
1419                                 goto invalid;
1420                         }
1421                         attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1422                         if (attr != NULL) {
1423                                 mode = strtol(attr, NULL, 8);
1424                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1425                         } else {
1426                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1427                         }
1428                         valid = 1;
1429                         continue;
1430                 }
1431
1432                 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1433                         int flag = 0;
1434
1435                         attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1436                         if (attr != NULL && strstr(attr, "ignore_error"))
1437                                 flag = 1;
1438                         rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1439                         valid = 1;
1440                         continue;
1441                 }
1442
1443                 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1444                         rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1445                         valid = 1;
1446                         continue;
1447                 }
1448
1449                 if (strcasecmp(key, "LABEL") == 0) {
1450                         rule_tmp.rule.rule.label_off = add_string(rules, value);
1451                         valid = 1;
1452                         continue;
1453                 }
1454
1455                 if (strcasecmp(key, "GOTO") == 0) {
1456                         rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1457                         valid = 1;
1458                         continue;
1459                 }
1460
1461                 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1462                         if (op < OP_MATCH_MAX) {
1463                                 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1464                         } else {
1465                                 if (value[0] == '\0')
1466                                         dbg(rules->udev, "name empty, node creation suppressed\n");
1467                                 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1468                                 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1469                                 if (attr != NULL) {
1470                                         if (strstr(attr, "all_partitions") != NULL) {
1471                                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1472
1473                                                 dbg(rules->udev, "creation of partition nodes requested\n");
1474                                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1475                                         }
1476                                         if (strstr(attr, "ignore_remove") != NULL) {
1477                                                 dbg(rules->udev, "remove event should be ignored\n");
1478                                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1479                                         }
1480                                 }
1481                         }
1482                         rule_tmp.rule.rule.flags = 1;
1483                         continue;
1484                 }
1485
1486                 if (strcasecmp(key, "SYMLINK") == 0) {
1487                         if (op < OP_MATCH_MAX)
1488                                 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1489                         else
1490                                 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1491                         rule_tmp.rule.rule.flags = 1;
1492                         valid = 1;
1493                         continue;
1494                 }
1495
1496                 if (strcasecmp(key, "OWNER") == 0) {
1497                         uid_t uid;
1498                         char *endptr;
1499
1500                         uid = strtoul(value, &endptr, 10);
1501                         if (endptr[0] == '\0') {
1502                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1503                         } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1504                                 uid = add_uid(rules, value);
1505                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1506                         } else {
1507                                 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1508                         }
1509                         rule_tmp.rule.rule.flags = 1;
1510                         valid = 1;
1511                         continue;
1512                 }
1513
1514                 if (strcasecmp(key, "GROUP") == 0) {
1515                         gid_t gid;
1516                         char *endptr;
1517
1518                         gid = strtoul(value, &endptr, 10);
1519                         if (endptr[0] == '\0') {
1520                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1521                         } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1522                                 gid = add_gid(rules, value);
1523                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1524                         } else {
1525                                 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1526                         }
1527                         rule_tmp.rule.rule.flags = 1;
1528                         valid = 1;
1529                         continue;
1530                 }
1531
1532                 if (strcasecmp(key, "MODE") == 0) {
1533                         mode_t mode;
1534                         char *endptr;
1535
1536                         mode = strtol(value, &endptr, 8);
1537                         if (endptr[0] == '\0')
1538                                 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1539                         else
1540                                 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1541                         rule_tmp.rule.rule.flags = 1;
1542                         valid = 1;
1543                         continue;
1544                 }
1545
1546                 if (strcasecmp(key, "OPTIONS") == 0) {
1547                         const char *pos;
1548
1549                         if (strstr(value, "last_rule") != NULL) {
1550                                 dbg(rules->udev, "last rule to be applied\n");
1551                                 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1552                         }
1553                         if (strstr(value, "ignore_device") != NULL) {
1554                                 dbg(rules->udev, "device should be ignored\n");
1555                                 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1556                         }
1557                         if (strstr(value, "ignore_remove") != NULL) {
1558                                 dbg(rules->udev, "remove event should be ignored\n");
1559                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1560                         }
1561                         pos = strstr(value, "link_priority=");
1562                         if (pos != NULL) {
1563                                 int prio = atoi(&pos[strlen("link_priority=")]);
1564
1565                                 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1566                                 dbg(rules->udev, "link priority=%i\n", prio);
1567                         }
1568                         pos = strstr(value, "event_timeout=");
1569                         if (pos != NULL) {
1570                                 int tout = atoi(&pos[strlen("event_timeout=")]);
1571
1572                                 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1573                                 dbg(rules->udev, "event timout=%i\n", tout);
1574                         }
1575                         pos = strstr(value, "string_escape=");
1576                         if (pos != NULL) {
1577                                 pos = &pos[strlen("string_escape=")];
1578                                 if (strncmp(pos, "none", strlen("none")) == 0)
1579                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1580                                 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1581                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1582                         }
1583                         if (strstr(value, "all_partitions") != NULL) {
1584                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1585
1586                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1587                                 dbg(rules->udev, "creation of partition nodes requested\n");
1588                         }
1589                         valid = 1;
1590                         continue;
1591                 }
1592                 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1593         }
1594
1595         if (physdev)
1596                 err(rules->udev, "PHYSDEV* values are deprecated and not available on recent kernels, \n"
1597                     "please fix it in %s:%u", filename, lineno);
1598
1599         /* skip line if not any valid key was found */
1600         if (!valid)
1601                 goto invalid;
1602
1603         /* add rule token */
1604         rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1605         if (add_token(rules, &rule_tmp.rule) != 0)
1606                 goto invalid;
1607
1608         /* add tokens to list, sorted by type */
1609         if (sort_token(rules, &rule_tmp) != 0)
1610                 goto invalid;
1611
1612         return 0;
1613 invalid:
1614         err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1615         return -1;
1616 }
1617
1618 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1619 {
1620         FILE *f;
1621         unsigned int first_token;
1622         char line[UTIL_LINE_SIZE];
1623         int line_nr = 0;
1624         unsigned int i;
1625
1626         info(rules->udev, "reading '%s' as rules file\n", filename);
1627
1628         f = fopen(filename, "r");
1629         if (f == NULL)
1630                 return -1;
1631
1632         first_token = rules->token_cur;
1633
1634         while(fgets(line, sizeof(line), f) != NULL) {
1635                 char *key;
1636                 size_t len;
1637
1638                 /* skip whitespace */
1639                 line_nr++;
1640                 key = line;
1641                 while (isspace(key[0]))
1642                         key++;
1643
1644                 /* comment */
1645                 if (key[0] == '#')
1646                         continue;
1647
1648                 len = strlen(line);
1649                 if (len < 3)
1650                         continue;
1651
1652                 /* continue reading if backslash+newline is found */
1653                 while (line[len-2] == '\\') {
1654                         if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1655                                 break;
1656                         line_nr++;
1657                         len = strlen(line);
1658                 }
1659
1660                 if (len+1 >= sizeof(line)) {
1661                         err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1662                         continue;
1663                 }
1664                 add_rule(rules, key, filename, filename_off, line_nr);
1665         }
1666         fclose(f);
1667
1668         /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1669         for (i = first_token+1; i < rules->token_cur; i++) {
1670                 if (rules->tokens[i].type == TK_A_GOTO) {
1671                         char *label = &rules->buf[rules->tokens[i].key.value_off];
1672                         unsigned int j;
1673
1674                         for (j = i+1; j < rules->token_cur; j++) {
1675                                 if (rules->tokens[j].type != TK_RULE)
1676                                         continue;
1677                                 if (rules->tokens[j].rule.label_off == 0)
1678                                         continue;
1679                                 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1680                                         continue;
1681                                 rules->tokens[i].key.rule_goto = j;
1682                         }
1683                         if (rules->tokens[i].key.rule_goto == 0)
1684                                 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1685                 }
1686         }
1687         return 0;
1688 }
1689
1690 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1691 {
1692         DIR *dir;
1693         char filename[UTIL_PATH_SIZE];
1694
1695         dbg(udev, "open directory '%s'\n", dirname);
1696         dir = opendir(dirname);
1697         if (dir == NULL) {
1698                 err(udev, "unable to open '%s': %m\n", dirname);
1699                 return -1;
1700         }
1701
1702         while (1) {
1703                 struct dirent *dent;
1704
1705                 dent = readdir(dir);
1706                 if (dent == NULL || dent->d_name[0] == '\0')
1707                         break;
1708
1709                 if (dent->d_name[0] == '.')
1710                         continue;
1711
1712                 /* look for file matching with specified suffix */
1713                 if (suffix != NULL) {
1714                         const char *ext;
1715
1716                         ext = strrchr(dent->d_name, '.');
1717                         if (ext == NULL)
1718                                 continue;
1719                         if (strcmp(ext, suffix) != 0)
1720                                 continue;
1721                 }
1722                 dbg(udev, "put file '%s/%s' into list\n", dirname, dent->d_name);
1723
1724                 snprintf(filename, sizeof(filename), "%s/%s", dirname, dent->d_name);
1725                 filename[sizeof(filename)-1] = '\0';
1726                 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1727         }
1728
1729         closedir(dir);
1730         return 0;
1731 }
1732
1733 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1734 {
1735         struct udev_rules *rules;
1736         struct stat statbuf;
1737         struct udev_list_node file_list;
1738         struct udev_list_entry *file_loop, *file_tmp;
1739         struct token end_token;
1740
1741         rules = malloc(sizeof(struct udev_rules));
1742         if (rules == NULL)
1743                 return NULL;
1744         memset(rules, 0x00, sizeof(struct udev_rules));
1745         rules->udev = udev;
1746         rules->resolve_names = resolve_names;
1747         udev_list_init(&file_list);
1748
1749         /* init token array and string buffer */
1750         rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1751         if (rules->tokens == NULL)
1752                 return NULL;
1753         rules->token_max = PREALLOC_TOKEN;
1754
1755         rules->buf = malloc(PREALLOC_STRBUF);
1756         if (rules->buf == NULL)
1757                 return NULL;
1758         rules->buf_max = PREALLOC_STRBUF;
1759         /* offset 0 is always '\0' */
1760         rules->buf[0] = '\0';
1761         rules->buf_cur = 1;
1762         dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1763             rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1764
1765         rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1766         if (rules->trie_nodes == NULL)
1767                 return NULL;
1768         rules->trie_nodes_max = PREALLOC_TRIE;
1769         /* offset 0 is reserved for the null trie node */
1770         rules->trie_nodes_cur = 1;
1771
1772         rules->trie_childs = malloc(PREALLOC_TRIE * sizeof(struct trie_child));
1773         if (rules->trie_childs == NULL)
1774                 return NULL;
1775         rules->trie_childs_max = PREALLOC_TRIE;
1776
1777         rules->trie_root = calloc(UCHAR_MAX + 1, sizeof(unsigned short));
1778
1779         if (udev_get_rules_path(udev) != NULL) {
1780                 /* custom rules location for testing */
1781                 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1782         } else {
1783                 char filename[PATH_MAX];
1784                 struct udev_list_node sort_list;
1785                 struct udev_list_entry *sort_loop, *sort_tmp;
1786
1787                 /* read user/custom rules */
1788                 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1789
1790                 /* read dynamic/temporary rules */
1791                 util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
1792                 util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
1793                 if (stat(filename, &statbuf) != 0) {
1794                         util_create_path(udev, filename);
1795                         udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1796                         mkdir(filename, 0755);
1797                         udev_selinux_resetfscreatecon(udev);
1798                 }
1799                 udev_list_init(&sort_list);
1800                 add_matching_files(udev, &sort_list, filename, ".rules");
1801
1802                 /* read default rules */
1803                 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1804
1805                 /* sort all rules files by basename into list of files */
1806                 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1807                         const char *sort_name = udev_list_entry_get_name(sort_loop);
1808                         const char *sort_base = strrchr(sort_name, '/');
1809
1810                         if (sort_base == NULL)
1811                                 continue;
1812                         /* sort entry into existing list */
1813                         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1814                                 const char *file_name = udev_list_entry_get_name(file_loop);
1815                                 const char *file_base = strrchr(file_name, '/');
1816
1817                                 if (file_base == NULL)
1818                                         continue;
1819                                 if (strcmp(file_base, sort_base) == 0) {
1820                                         info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1821                                              file_name, sort_name);
1822                                         udev_list_entry_delete(sort_loop);
1823                                         sort_loop = NULL;
1824                                         break;
1825                                 }
1826                                 if (strcmp(file_base, sort_base) > 0) {
1827                                         /* found later file, insert before */
1828                                         udev_list_entry_remove(sort_loop);
1829                                         udev_list_entry_insert_before(sort_loop, file_loop);
1830                                         sort_loop = NULL;
1831                                         break;
1832                                 }
1833                         }
1834                         /* current file already handled */
1835                         if (sort_loop == NULL)
1836                                 continue;
1837                         /* no later file, append to end of list */
1838                         udev_list_entry_remove(sort_loop);
1839                         udev_list_entry_append(sort_loop, &file_list);
1840                 }
1841         }
1842
1843         /* add all filenames to the string buffer */
1844         udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1845                 const char *filename = udev_list_entry_get_name(file_loop);
1846                 unsigned int filename_off;
1847
1848                 filename_off = add_string(rules, filename);
1849                 /* the offset in the rule is limited to unsigned short */
1850                 if (filename_off < USHRT_MAX)
1851                         udev_list_entry_set_flag(file_loop, filename_off);
1852         }
1853
1854         /* parse list of files */
1855         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1856                 const char *filename = udev_list_entry_get_name(file_loop);
1857                 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1858
1859                 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1860                         parse_file(rules, filename, filename_off);
1861                 else
1862                         info(udev, "can not read '%s'\n", filename);
1863                 udev_list_entry_delete(file_loop);
1864         }
1865
1866         memset(&end_token, 0x00, sizeof(struct token));
1867         end_token.type = TK_END;
1868         add_token(rules, &end_token);
1869
1870         /* shrink allocated token and string buffer */
1871         if (rules->token_cur < rules->token_max) {
1872                 struct token *tokens;
1873
1874                 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1875                 if (tokens != NULL || rules->token_cur == 0) {
1876                         rules->tokens = tokens;
1877                         rules->token_max = rules->token_cur;
1878                 }
1879         }
1880         if (rules->buf_cur < rules->buf_max) {
1881                 char *buf;
1882
1883                 buf = realloc(rules->buf, rules->buf_cur);
1884                 if (buf != NULL || rules->buf_cur == 0) {
1885                         rules->buf = buf;
1886                         rules->buf_max = rules->buf_cur;
1887                 }
1888         }
1889         info(udev, "shrunk to %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1890              rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1891         info(udev, "used %zu bytes for index (%u * %zu bytes nodes, %u * %zu bytes child links)\n",
1892              rules->trie_nodes_cur * sizeof(struct trie_node) + rules->trie_childs_cur * sizeof(struct trie_child),
1893              rules->trie_nodes_cur, sizeof(struct trie_node),
1894              rules->trie_childs_cur, sizeof(struct trie_child));
1895
1896         /* cleanup trie */
1897         free(rules->trie_nodes);
1898         rules->trie_nodes = NULL;
1899         rules->trie_nodes_cur = 0;
1900         rules->trie_nodes_max = 0;
1901         free(rules->trie_childs);
1902         rules->trie_childs = NULL;
1903         rules->trie_childs_cur = 0;
1904         rules->trie_childs_max = 0;
1905         free(rules->trie_root);
1906         rules->trie_root = NULL;
1907
1908         /* cleanup uid/gid cache */
1909         free(rules->uids);
1910         rules->uids = NULL;
1911         rules->uids_cur = 0;
1912         rules->uids_max = 0;
1913         free(rules->gids);
1914         rules->gids = NULL;
1915         rules->gids_cur = 0;
1916         rules->gids_max = 0;
1917
1918         dump_rules(rules);
1919         return rules;
1920 }
1921
1922 void udev_rules_unref(struct udev_rules *rules)
1923 {
1924         if (rules == NULL)
1925                 return;
1926         free(rules->tokens);
1927         free(rules->buf);
1928         free(rules->trie_nodes);
1929         free(rules->trie_childs);
1930         free(rules->trie_root);
1931         free(rules->uids);
1932         free(rules->gids);
1933         free(rules);
1934 }
1935
1936 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1937 {
1938         char *key_value = &rules->buf[token->key.value_off];
1939         char *pos;
1940         int match = 0;
1941
1942         if (val == NULL)
1943                 val = "";
1944
1945         switch (token->key.glob) {
1946         case GL_PLAIN:
1947                 match = (strcmp(key_value, val) == 0);
1948                 break;
1949         case GL_GLOB:
1950                 match = (fnmatch(key_value, val, 0) == 0);
1951                 break;
1952         case GL_SPLIT:
1953                 {
1954                         const char *split;
1955                         size_t len;
1956
1957                         split = &rules->buf[token->key.value_off];
1958                         len = strlen(val);
1959                         while (1) {
1960                                 const char *next;
1961
1962                                 next = strchr(split, '|');
1963                                 if (next != NULL) {
1964                                         size_t matchlen = (size_t)(next - split);
1965
1966                                         match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1967                                         if (match)
1968                                                 break;
1969                                 } else {
1970                                         match = (strcmp(split, val) == 0);
1971                                         break;
1972                                 }
1973                                 split = &next[1];
1974                         }
1975                         break;
1976                 }
1977         case GL_SPLIT_GLOB:
1978                 {
1979                         char value[UTIL_PATH_SIZE];
1980
1981                         util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value));
1982                         key_value = value;
1983                         while (key_value != NULL) {
1984                                 pos = strchr(key_value, '|');
1985                                 if (pos != NULL) {
1986                                         pos[0] = '\0';
1987                                         pos = &pos[1];
1988                                 }
1989                                 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1990                                 match = (fnmatch(key_value, val, 0) == 0);
1991                                 if (match)
1992                                         break;
1993                                 key_value = pos;
1994                         }
1995                         break;
1996                 }
1997         case GL_SOMETHING:
1998                 match = (val[0] != '\0');
1999                 break;
2000         case GL_FORMAT:
2001         case GL_UNSET:
2002                 return -1;
2003         }
2004
2005         if (match && (token->key.op == OP_MATCH)) {
2006                 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
2007                 return 0;
2008         }
2009         if (!match && (token->key.op == OP_NOMATCH)) {
2010                 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
2011                 return 0;
2012         }
2013         dbg(rules->udev, "%s is not true\n", token_str(token->type));
2014         return -1;
2015 }
2016
2017 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
2018 {
2019         const char *key_name = &rules->buf[cur->key.attr_off];
2020         const char *key_value = &rules->buf[cur->key.value_off];
2021         char value[UTIL_NAME_SIZE];
2022         size_t len;
2023
2024         value[0] = '\0';
2025         if (key_name[0] == '[') {
2026                 char attr[UTIL_PATH_SIZE];
2027
2028                 util_strlcpy(attr, key_name, sizeof(attr));
2029                 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
2030         }
2031         if (value[0] == '\0') {
2032                 const char *val;
2033
2034                 val = udev_device_get_sysattr_value(dev, key_name);
2035                 if (val == NULL)
2036                         return -1;
2037                 util_strlcpy(value, val, sizeof(value));
2038         }
2039
2040         /* strip trailing whitespace of value, if not asked to match for it */
2041         len = strlen(key_value);
2042         if (len > 0 && !isspace(key_value[len-1])) {
2043                 len = strlen(value);
2044                 while (len > 0 && isspace(value[--len]))
2045                         value[len] = '\0';
2046                 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
2047         }
2048         return match_key(rules, cur, value);
2049 }
2050
2051 enum escape_type {
2052         ESCAPE_UNSET,
2053         ESCAPE_NONE,
2054         ESCAPE_REPLACE,
2055 };
2056
2057 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
2058 {
2059         struct token *cur;
2060         struct token *rule;
2061         enum escape_type esc = ESCAPE_UNSET;
2062         int can_set_name;
2063
2064         if (rules->tokens == NULL)
2065                 return -1;
2066
2067         can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
2068                          strcmp(udev_device_get_action(event->dev), "change") == 0) &&
2069                         (major(udev_device_get_devnum(event->dev)) > 0 ||
2070                          strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
2071
2072         /* loop through token list, match, run actions or forward to next rule */
2073         cur = &rules->tokens[0];
2074         rule = cur;
2075         while (1) {
2076                 dump_token(rules, cur);
2077                 switch (cur->type) {
2078                 case TK_RULE:
2079                         /* current rule */
2080                         rule = cur;
2081                         /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2082                         if (!can_set_name && rule->rule.flags)
2083                                 ;//goto nomatch;
2084                         esc = ESCAPE_UNSET;
2085                         break;
2086                 case TK_M_ACTION:
2087                         if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2088                                 goto nomatch;
2089                         break;
2090                 case TK_M_DEVPATH:
2091                         if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2092                                 goto nomatch;
2093                         break;
2094                 case TK_M_KERNEL:
2095                         if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2096                                 goto nomatch;
2097                         break;
2098                 case TK_M_DEVLINK:
2099                         {
2100                                 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2101                                 struct udev_list_entry *list_entry;
2102                                 int match = 0;
2103
2104                                 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2105                                         const char *devlink;
2106
2107                                         devlink =  &udev_list_entry_get_name(list_entry)[devlen];
2108                                         if (match_key(rules, cur, devlink) == 0) {
2109                                                 match = 1;
2110                                                 break;
2111                                         }
2112                                 }
2113                                 if (!match)
2114                                         goto nomatch;
2115                                 break;
2116                         }
2117                 case TK_M_NAME:
2118                         if (match_key(rules, cur, event->name) != 0)
2119                                 goto nomatch;
2120                         break;
2121                 case TK_M_ENV:
2122                         {
2123                                 struct udev_list_entry *list_entry;
2124                                 const char *key_name = &rules->buf[cur->key.attr_off];
2125                                 const char *value;
2126
2127                                 list_entry = udev_device_get_properties_list_entry(event->dev);
2128                                 list_entry = udev_list_entry_get_by_name(list_entry, key_name);
2129                                 value = udev_list_entry_get_value(list_entry);
2130                                 if (value == NULL) {
2131                                         dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2132                                         value = "";
2133                                 }
2134                                 if (match_key(rules, cur, value))
2135                                         goto nomatch;
2136                                 break;
2137                         }
2138                 case TK_M_SUBSYSTEM:
2139                         if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2140                                 goto nomatch;
2141                         break;
2142                 case TK_M_DRIVER:
2143                         if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2144                                 goto nomatch;
2145                         break;
2146                 case TK_M_WAITFOR:
2147                         {
2148                                 char filename[UTIL_PATH_SIZE];
2149                                 int found;
2150
2151                                 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2152                                 udev_event_apply_format(event, filename, sizeof(filename));
2153                                 found = (wait_for_file(event->dev, filename, 10) == 0);
2154                                 if (!found && (cur->key.op != OP_NOMATCH))
2155                                         goto nomatch;
2156                                 break;
2157                         }
2158                 case TK_M_ATTR:
2159                         if (match_attr(rules, event->dev, event, cur) != 0)
2160                                 goto nomatch;
2161                         break;
2162                 case TK_M_KERNELS:
2163                 case TK_M_SUBSYSTEMS:
2164                 case TK_M_DRIVERS:
2165                 case TK_M_ATTRS:
2166                         {
2167                                 struct token *next;
2168
2169                                 /* get whole sequence of parent matches */
2170                                 next = cur;
2171                                 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2172                                         next++;
2173
2174                                 /* loop over parents */
2175                                 event->dev_parent = event->dev;
2176                                 while (1) {
2177                                         struct token *key;
2178
2179                                         dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2180                                         /* loop over sequence of parent match keys */
2181                                         for (key = cur; key < next; key++ ) {
2182                                                 dump_token(rules, key);
2183                                                 switch(key->type) {
2184                                                 case TK_M_KERNELS:
2185                                                         if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2186                                                                 goto try_parent;
2187                                                         break;
2188                                                 case TK_M_SUBSYSTEMS:
2189                                                         if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2190                                                                 goto try_parent;
2191                                                         break;
2192                                                 case TK_M_DRIVERS:
2193                                                         if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2194                                                                 goto try_parent;
2195                                                         break;
2196                                                 case TK_M_ATTRS:
2197                                                         if (match_attr(rules, event->dev_parent, event, key) != 0)
2198                                                                 goto try_parent;
2199                                                         break;
2200                                                 default:
2201                                                         goto nomatch;
2202                                                 }
2203                                                 dbg(event->udev, "parent key matched\n");
2204                                         }
2205                                         dbg(event->udev, "all parent keys matched\n");
2206                                         /* all keys matched */
2207                                         break;
2208
2209                                 try_parent:
2210                                         event->dev_parent = udev_device_get_parent(event->dev_parent);
2211                                         if (event->dev_parent == NULL)
2212                                                 goto nomatch;
2213                                 }
2214                                 /* move behind our sequence of parent match keys */
2215                                 cur = next;
2216                                 continue;
2217                         }
2218                 case TK_M_TEST:
2219                         {
2220                                 char filename[UTIL_PATH_SIZE];
2221                                 struct stat statbuf;
2222                                 int match;
2223
2224                                 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2225                                 udev_event_apply_format(event, filename, sizeof(filename));
2226                                 if (util_resolve_subsys_kernel(event->udev, NULL, filename, sizeof(filename), 0) != 0)
2227                                         if (filename[0] != '/') {
2228                                                 char tmp[UTIL_PATH_SIZE];
2229
2230                                                 util_strlcpy(tmp, udev_device_get_syspath(event->dev), sizeof(tmp));
2231                                                 util_strlcat(tmp, "/", sizeof(tmp));
2232                                                 util_strlcat(tmp, filename, sizeof(tmp));
2233                                                 util_strlcpy(filename, tmp, sizeof(filename));
2234                                         }
2235
2236                                 attr_subst_subdir(filename, sizeof(filename));
2237
2238                                 match = (stat(filename, &statbuf) == 0);
2239                                 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2240                                 if (match && cur->key.mode > 0) {
2241                                         match = ((statbuf.st_mode & cur->key.mode) > 0);
2242                                         dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2243                                             match ? "matches" : "does not match", cur->key.mode);
2244                                 }
2245                                 if (match && cur->key.op == OP_NOMATCH)
2246                                         goto nomatch;
2247                                 if (!match && cur->key.op == OP_MATCH)
2248                                         goto nomatch;
2249                                 break;
2250                         }
2251                 case TK_M_PROGRAM:
2252                         {
2253                                 char program[UTIL_PATH_SIZE];
2254                                 char **envp;
2255                                 char result[UTIL_PATH_SIZE];
2256
2257                                 free(event->program_result);
2258                                 event->program_result = NULL;
2259                                 util_strlcpy(program, &rules->buf[cur->key.value_off], sizeof(program));
2260                                 udev_event_apply_format(event, program, sizeof(program));
2261                                 envp = udev_device_get_properties_envp(event->dev);
2262                                 info(event->udev, "PROGRAM '%s' %s:%u\n",
2263                                      program,
2264                                      &rules->buf[rule->rule.filename_off],
2265                                      rule->rule.filename_line);
2266                                 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2267                                         if (cur->key.op != OP_NOMATCH)
2268                                                 goto nomatch;
2269                                 } else {
2270                                         int count;
2271
2272                                         util_remove_trailing_chars(result, '\n');
2273                                         if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2274                                                 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2275                                                 if (count > 0)
2276                                                         info(event->udev, "%i character(s) replaced\n" , count);
2277                                         }
2278                                         event->program_result = strdup(result);
2279                                         dbg(event->udev, "storing result '%s'\n", event->program_result);
2280                                         if (cur->key.op == OP_NOMATCH)
2281                                                 goto nomatch;
2282                                 }
2283                                 break;
2284                         }
2285                 case TK_M_IMPORT_FILE:
2286                         {
2287                                 char import[UTIL_PATH_SIZE];
2288
2289                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2290                                 udev_event_apply_format(event, import, sizeof(import));
2291                                 if (import_file_into_properties(event->dev, import) != 0)
2292                                         if (cur->key.op != OP_NOMATCH)
2293                                                 goto nomatch;
2294                                 break;
2295                         }
2296                 case TK_M_IMPORT_PROG:
2297                         {
2298                                 char import[UTIL_PATH_SIZE];
2299
2300                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2301                                 udev_event_apply_format(event, import, sizeof(import));
2302                                 info(event->udev, "IMPORT '%s' %s:%u\n",
2303                                      import,
2304                                      &rules->buf[rule->rule.filename_off],
2305                                      rule->rule.filename_line);
2306                                 if (import_program_into_properties(event->dev, import) != 0)
2307                                         if (cur->key.op != OP_NOMATCH)
2308                                                 goto nomatch;
2309                                 break;
2310                         }
2311                 case TK_M_IMPORT_PARENT:
2312                         {
2313                                 char import[UTIL_PATH_SIZE];
2314
2315                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2316                                 udev_event_apply_format(event, import, sizeof(import));
2317                                 if (import_parent_into_properties(event->dev, import) != 0)
2318                                         if (cur->key.op != OP_NOMATCH)
2319                                                 goto nomatch;
2320                                 break;
2321                         }
2322                 case TK_M_RESULT:
2323                         if (match_key(rules, cur, event->program_result) != 0)
2324                                 goto nomatch;
2325                         break;
2326
2327                 case TK_A_IGNORE_DEVICE:
2328                         event->ignore_device = 1;
2329                         return 0;
2330                         break;
2331                 case TK_A_STRING_ESCAPE_NONE:
2332                         esc = ESCAPE_NONE;
2333                         break;
2334                 case TK_A_STRING_ESCAPE_REPLACE:
2335                         esc = ESCAPE_REPLACE;
2336                         break;
2337                 case TK_A_NUM_FAKE_PART:
2338                         if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2339                                 break;
2340                         if (udev_device_get_sysnum(event->dev) != NULL)
2341                                 break;
2342                         udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
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                                 util_strlcpy(owner,  &rules->buf[cur->key.value_off], sizeof(owner));
2356                                 udev_event_apply_format(event, owner, sizeof(owner));
2357                                 event->uid = util_lookup_user(event->udev, owner);
2358                                 info(event->udev, "OWNER %u %s:%u\n",
2359                                      event->uid,
2360                                      &rules->buf[rule->rule.filename_off],
2361                                      rule->rule.filename_line);
2362                                 break;
2363                         }
2364                 case TK_A_GROUP:
2365                         {
2366                                 char group[UTIL_NAME_SIZE];
2367
2368                                 if (event->group_final)
2369                                         break;
2370                                 if (cur->key.op == OP_ASSIGN_FINAL)
2371                                         event->group_final = 1;
2372                                 util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group));
2373                                 udev_event_apply_format(event, group, sizeof(group));
2374                                 event->gid = util_lookup_group(event->udev, group);
2375                                 info(event->udev, "GROUP %u %s:%u\n",
2376                                      event->gid,
2377                                      &rules->buf[rule->rule.filename_off],
2378                                      rule->rule.filename_line);
2379                                 break;
2380                         }
2381                 case TK_A_MODE:
2382                         {
2383                                 char mode[UTIL_NAME_SIZE];
2384                                 char *endptr;
2385
2386                                 if (event->mode_final)
2387                                         break;
2388                                 if (cur->key.op == OP_ASSIGN_FINAL)
2389                                         event->mode_final = 1;
2390                                 util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode));
2391                                 udev_event_apply_format(event, mode, sizeof(mode));
2392                                 event->mode = strtol(mode, &endptr, 8);
2393                                 if (endptr[0] != '\0') {
2394                                         err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2395                                         event->mode = 0660;
2396                                 }
2397                                 info(event->udev, "MODE %#o %s:%u\n",
2398                                      event->mode,
2399                                      &rules->buf[rule->rule.filename_off],
2400                                      rule->rule.filename_line);
2401                                 break;
2402                         }
2403                 case TK_A_OWNER_ID:
2404                         if (event->owner_final)
2405                                 break;
2406                         if (cur->key.op == OP_ASSIGN_FINAL)
2407                                 event->owner_final = 1;
2408                         event->uid = cur->key.uid;
2409                         info(event->udev, "OWNER %u %s:%u\n",
2410                              event->uid,
2411                              &rules->buf[rule->rule.filename_off],
2412                              rule->rule.filename_line);
2413                         break;
2414                 case TK_A_GROUP_ID:
2415                         if (event->group_final)
2416                                 break;
2417                         if (cur->key.op == OP_ASSIGN_FINAL)
2418                                 event->group_final = 1;
2419                         event->gid = cur->key.gid;
2420                         info(event->udev, "GROUP %u %s:%u\n",
2421                              event->gid,
2422                              &rules->buf[rule->rule.filename_off],
2423                              rule->rule.filename_line);
2424                         break;
2425                 case TK_A_MODE_ID:
2426                         if (event->mode_final)
2427                                 break;
2428                         if (cur->key.op == OP_ASSIGN_FINAL)
2429                                 event->mode_final = 1;
2430                         event->mode = cur->key.mode;
2431                         info(event->udev, "MODE %#o %s:%u\n",
2432                              event->mode,
2433                              &rules->buf[rule->rule.filename_off],
2434                              rule->rule.filename_line);
2435                         break;
2436                 case TK_A_ENV:
2437                         {
2438                                 const char *name = &rules->buf[cur->key.attr_off];
2439                                 char *value = &rules->buf[cur->key.value_off];
2440
2441                                 if (value[0] != '\0') {
2442                                         char temp_value[UTIL_NAME_SIZE];
2443                                         struct udev_list_entry *entry;
2444
2445                                         util_strlcpy(temp_value, value, sizeof(temp_value));
2446                                         udev_event_apply_format(event, temp_value, sizeof(temp_value));
2447                                         entry = udev_device_add_property(event->dev, name, temp_value);
2448                                         /* store in db */
2449                                         udev_list_entry_set_flag(entry, 1);
2450                                 } else {
2451                                         udev_device_add_property(event->dev, name, NULL);
2452                                 }
2453                                 break;
2454                         }
2455                 case TK_A_NAME:
2456                         {
2457                                 const char *name  = &rules->buf[cur->key.value_off];
2458                                 char name_str[UTIL_PATH_SIZE];
2459                                 int count;
2460
2461                                 if (event->name_final)
2462                                         break;
2463                                 if (cur->key.op == OP_ASSIGN_FINAL)
2464                                         event->name_final = 1;
2465                                 if (name[0] == '\0') {
2466                                         free(event->name);
2467                                         event->name = NULL;
2468                                         break;
2469                                 }
2470                                 util_strlcpy(name_str, name, sizeof(name_str));
2471                                 udev_event_apply_format(event, name_str, sizeof(name_str));
2472                                 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2473                                         count = udev_util_replace_chars(name_str, "/");
2474                                         if (count > 0)
2475                                                 info(event->udev, "%i character(s) replaced\n", count);
2476                                         free(event->name);
2477                                         event->name = strdup(name_str);
2478                                         info(event->udev, "NAME '%s' %s:%u\n",
2479                                              event->name,
2480                                              &rules->buf[rule->rule.filename_off],
2481                                              rule->rule.filename_line);
2482                                 }
2483                                 break;
2484                         }
2485                 case TK_A_DEVLINK:
2486                         {
2487                                 char temp[UTIL_PATH_SIZE];
2488                                 char filename[UTIL_PATH_SIZE];
2489                                 char *pos, *next;
2490                                 int count = 0;
2491
2492                                 if (event->devlink_final)
2493                                         break;
2494                                 if (major(udev_device_get_devnum(event->dev)) == 0)
2495                                         break;
2496                                 if (cur->key.op == OP_ASSIGN_FINAL)
2497                                         event->devlink_final = 1;
2498                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2499                                         udev_device_cleanup_devlinks_list(event->dev);
2500
2501                                 /* allow  multiple symlinks separated by spaces */
2502                                 util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));
2503                                 udev_event_apply_format(event, temp, sizeof(temp));
2504                                 if (esc == ESCAPE_UNSET)
2505                                         count = udev_util_replace_chars(temp, "/ ");
2506                                 else if (esc == ESCAPE_REPLACE)
2507                                         count = udev_util_replace_chars(temp, "/");
2508                                 if (count > 0)
2509                                         info(event->udev, "%i character(s) replaced\n" , count);
2510                                 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2511                                 pos = temp;
2512                                 while (isspace(pos[0]))
2513                                         pos++;
2514                                 next = strchr(pos, ' ');
2515                                 while (next) {
2516                                         next[0] = '\0';
2517                                         info(event->udev, "LINK '%s' %s:%u\n",
2518                                              pos,
2519                                              &rules->buf[rule->rule.filename_off],
2520                                              rule->rule.filename_line);
2521                                         util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2522                                         util_strlcat(filename, "/", sizeof(filename));
2523                                         util_strlcat(filename, pos, sizeof(filename));
2524                                         udev_device_add_devlink(event->dev, filename);
2525                                         while (isspace(next[1]))
2526                                                 next++;
2527                                         pos = &next[1];
2528                                         next = strchr(pos, ' ');
2529                                 }
2530                                 if (pos[0] != '\0') {
2531                                         info(event->udev, "LINK '%s' %s:%u\n",
2532                                              pos,
2533                                              &rules->buf[rule->rule.filename_off],
2534                                              rule->rule.filename_line);
2535                                         util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2536                                         util_strlcat(filename, "/", sizeof(filename));
2537                                         util_strlcat(filename, pos, sizeof(filename));
2538                                         udev_device_add_devlink(event->dev, filename);
2539                                 }
2540                         }
2541                         break;
2542                 case TK_A_EVENT_TIMEOUT:
2543                         udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2544                         break;
2545                 case TK_A_IGNORE_REMOVE:
2546                         udev_device_set_ignore_remove(event->dev, 1);
2547                         break;
2548                 case TK_A_ATTR:
2549                         {
2550                                 const char *key_name = &rules->buf[cur->key.attr_off];
2551                                 char attr[UTIL_PATH_SIZE];
2552                                 char value[UTIL_NAME_SIZE];
2553                                 FILE *f;
2554
2555                                 util_strlcpy(attr, key_name, sizeof(attr));
2556                                 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) {
2557                                         util_strlcpy(attr, udev_device_get_syspath(event->dev), sizeof(attr));
2558                                         util_strlcat(attr, "/", sizeof(attr));
2559                                         util_strlcat(attr, key_name, sizeof(attr));
2560                                 }
2561
2562                                 attr_subst_subdir(attr, sizeof(attr));
2563
2564                                 util_strlcpy(value, &rules->buf[cur->key.value_off], sizeof(value));
2565                                 udev_event_apply_format(event, value, sizeof(value));
2566                                 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2567                                      &rules->buf[rule->rule.filename_off],
2568                                      rule->rule.filename_line);
2569                                 f = fopen(attr, "w");
2570                                 if (f != NULL) {
2571                                         if (!event->test)
2572                                                 if (fprintf(f, "%s", value) <= 0)
2573                                                         err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2574                                         fclose(f);
2575                                 } else {
2576                                         err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2577                                 }
2578                                 break;
2579                         }
2580                 case TK_A_RUN:
2581                         {
2582                                 struct udev_list_entry *list_entry;
2583
2584                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2585                                         udev_list_cleanup_entries(event->udev, &event->run_list);
2586                                 info(event->udev, "RUN '%s' %s:%u\n",
2587                                      &rules->buf[cur->key.value_off],
2588                                      &rules->buf[rule->rule.filename_off],
2589                                      rule->rule.filename_line);
2590                                 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2591                                                                  &rules->buf[cur->key.value_off], NULL, 1, 0);
2592                                 if (cur->key.ignore_error)
2593                                         udev_list_entry_set_flag(list_entry, 1);
2594                                 break;
2595                         }
2596                 case TK_A_GOTO:
2597                         cur = &rules->tokens[cur->key.rule_goto];
2598                         continue;
2599                 case TK_A_LAST_RULE:
2600                 case TK_END:
2601                         return 0;
2602
2603                 case TK_M_PARENTS_MIN:
2604                 case TK_M_PARENTS_MAX:
2605                 case TK_M_MAX:
2606                 case TK_UNSET:
2607                         err(rules->udev, "wrong type %u\n", cur->type);
2608                         goto nomatch;
2609                 }
2610
2611                 cur++;
2612                 continue;
2613         nomatch:
2614                 /* fast-forward to next rule */
2615                 cur = rule + rule->rule.token_count;
2616                 dbg(rules->udev, "forward to rule: %u\n",
2617                                  (unsigned int) (cur - rules->tokens));
2618         }
2619 }