udev/udev-rules.c

   1 /*
   2  * Copyright (C) 2003-2009 Kay Sievers <kay.sievers@vrfy.org>
   3  * Copyright (C) 2008 Alan Jenkins <alan-jenkins@tuffmail.co.uk>
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <stddef.h>
  20 #include <limits.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <stdio.h>
  24 #include <fcntl.h>
  25 #include <ctype.h>
  26 #include <unistd.h>
  27 #include <errno.h>
  28 #include <dirent.h>
  29 #include <fnmatch.h>
  30 #include <time.h>
  31
  32 #include "udev.h"
  33
  34 #define PREALLOC_TOKEN                  2048
  35 #define PREALLOC_STRBUF                 32 * 1024
  36 #define PREALLOC_TRIE                   256
  37
  38 struct uid_gid {
  39         unsigned int name_off;
  40         union {
  41                 uid_t   uid;
  42                 gid_t   gid;
  43         };
  44 };
  45
  46 struct trie_node {
  47         /* this node's first child */
  48         unsigned int child_idx;
  49         /* the next child of our parent node's child list */
  50         unsigned int next_child_idx;
  51         /* this node's last child (shortcut for append) */
  52         unsigned int last_child_idx;
  53         unsigned int value_off;
  54         unsigned short value_len;
  55         unsigned char key;
  56 };
  57
  58 struct udev_rules {
  59         struct udev *udev;
  60         int resolve_names;
  61
  62         /* every key in the rules file becomes a token */
  63         struct token *tokens;
  64         unsigned int token_cur;
  65         unsigned int token_max;
  66
  67         /* all key strings are copied to a single string buffer */
  68         char *buf;
  69         size_t buf_cur;
  70         size_t buf_max;
  71         unsigned int buf_count;
  72
  73         /* during rule parsing, strings are indexed to find duplicates */
  74         struct trie_node *trie_nodes;
  75         unsigned int trie_nodes_cur;
  76         unsigned int trie_nodes_max;
  77
  78         /* during rule parsing, uid/gid lookup results are cached */
  79         struct uid_gid *uids;
  80         unsigned int uids_cur;
  81         unsigned int uids_max;
  82         struct uid_gid *gids;
  83         unsigned int gids_cur;
  84         unsigned int gids_max;
  85 };
  86
  87 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
  88 enum operation_type {
  89         OP_UNSET,
  90
  91         OP_MATCH,
  92         OP_NOMATCH,
  93         OP_MATCH_MAX,
  94
  95         OP_ADD,
  96         OP_ASSIGN,
  97         OP_ASSIGN_FINAL,
  98 };
  99
 100 enum string_glob_type {
 101         GL_UNSET,
 102         GL_PLAIN,                       /* no special chars */
 103         GL_GLOB,                        /* shell globs ?,*,[] */
 104         GL_SPLIT,                       /* multi-value A|B */
 105         GL_SPLIT_GLOB,                  /* multi-value with glob A*|B* */
 106         GL_SOMETHING,                   /* commonly used "?*" */
 107 };
 108
 109 enum string_subst_type {
 110         SB_UNSET,
 111         SB_NONE,
 112         SB_FORMAT,
 113         SB_SUBSYS,
 114 };
 115
 116 /* tokens of a rule are sorted/handled in this order */
 117 enum token_type {
 118         TK_UNSET,
 119         TK_RULE,
 120
 121         TK_M_ACTION,                    /* val */
 122         TK_M_DEVPATH,                   /* val */
 123         TK_M_KERNEL,                    /* val */
 124         TK_M_DEVLINK,                   /* val */
 125         TK_M_NAME,                      /* val */
 126         TK_M_ENV,                       /* val, attr */
 127         TK_M_SUBSYSTEM,                 /* val */
 128         TK_M_DRIVER,                    /* val */
 129         TK_M_WAITFOR,                   /* val */
 130         TK_M_ATTR,                      /* val, attr */
 131
 132         TK_M_PARENTS_MIN,
 133         TK_M_KERNELS,                   /* val */
 134         TK_M_SUBSYSTEMS,                /* val */
 135         TK_M_DRIVERS,                   /* val */
 136         TK_M_ATTRS,                     /* val, attr */
 137         TK_M_PARENTS_MAX,
 138
 139         TK_M_TEST,                      /* val, mode_t */
 140         TK_M_PROGRAM,                   /* val */
 141         TK_M_IMPORT_FILE,               /* val */
 142         TK_M_IMPORT_PROG,               /* val */
 143         TK_M_IMPORT_PARENT,             /* val */
 144         TK_M_RESULT,                    /* val */
 145         TK_M_MAX,
 146
 147         TK_A_IGNORE_DEVICE,
 148         TK_A_STRING_ESCAPE_NONE,
 149         TK_A_STRING_ESCAPE_REPLACE,
 150         TK_A_INOTIFY_WATCH,             /* int */
 151         TK_A_NUM_FAKE_PART,             /* int */
 152         TK_A_DEVLINK_PRIO,              /* int */
 153         TK_A_OWNER,                     /* val */
 154         TK_A_GROUP,                     /* val */
 155         TK_A_MODE,                      /* val */
 156         TK_A_OWNER_ID,                  /* uid_t */
 157         TK_A_GROUP_ID,                  /* gid_t */
 158         TK_A_MODE_ID,                   /* mode_t */
 159         TK_A_ENV,                       /* val, attr */
 160         TK_A_NAME,                      /* val */
 161         TK_A_DEVLINK,                   /* val */
 162         TK_A_EVENT_TIMEOUT,             /* int */
 163         TK_A_IGNORE_REMOVE,
 164         TK_A_ATTR,                      /* val, attr */
 165         TK_A_RUN,                       /* val, bool */
 166         TK_A_GOTO,                      /* size_t */
 167         TK_A_LAST_RULE,
 168
 169         TK_END,
 170 };
 171
 172 /* we try to pack stuff in a way that we take only 12 bytes per token */
 173 struct token {
 174         union {
 175                 unsigned char type;             /* same as in rule and key */
 176                 struct {
 177                         enum token_type type:8;
 178                         unsigned int flags:8;
 179                         unsigned short token_count;
 180                         unsigned int label_off;
 181                         unsigned short filename_off;
 182                         unsigned short filename_line;
 183                 } rule;
 184                 struct {
 185                         enum token_type type:8;
 186                         enum operation_type op:8;
 187                         enum string_glob_type glob:8;
 188                         enum string_subst_type subst:4;
 189                         enum string_subst_type attrsubst:4;
 190                         unsigned int value_off;
 191                         union {
 192                                 unsigned int attr_off;
 193                                 int devlink_unique;
 194                                 int fail_on_error;
 195                                 unsigned int rule_goto;
 196                                 mode_t  mode;
 197                                 uid_t uid;
 198                                 gid_t gid;
 199                                 int num_fake_part;
 200                                 int devlink_prio;
 201                                 int event_timeout;
 202                                 int watch;
 203                         };
 204                 } key;
 205         };
 206 };
 207
 208 #define MAX_TK          64
 209 struct rule_tmp {
 210         struct udev_rules *rules;
 211         struct token rule;
 212         struct token token[MAX_TK];
 213         unsigned int token_cur;
 214 };
 215
 216 #ifdef ENABLE_DEBUG
 217 static const char *operation_str(enum operation_type type)
 218 {
 219         static const char *operation_strs[] = {
 220                 [OP_UNSET] =            "UNSET",
 221                 [OP_MATCH] =            "match",
 222                 [OP_NOMATCH] =          "nomatch",
 223                 [OP_MATCH_MAX] =        "MATCH_MAX",
 224
 225                 [OP_ADD] =              "add",
 226                 [OP_ASSIGN] =           "assign",
 227                 [OP_ASSIGN_FINAL] =     "assign-final",
 228 }       ;
 229
 230         return operation_strs[type];
 231 }
 232
 233 static const char *string_glob_str(enum string_glob_type type)
 234 {
 235         static const char *string_glob_strs[] = {
 236                 [GL_UNSET] =            "UNSET",
 237                 [GL_PLAIN] =            "plain",
 238                 [GL_GLOB] =             "glob",
 239                 [GL_SPLIT] =            "split",
 240                 [GL_SPLIT_GLOB] =       "split-glob",
 241                 [GL_SOMETHING] =        "split-glob",
 242         };
 243
 244         return string_glob_strs[type];
 245 }
 246
 247 static const char *token_str(enum token_type type)
 248 {
 249         static const char *token_strs[] = {
 250                 [TK_UNSET] =                    "UNSET",
 251                 [TK_RULE] =                     "RULE",
 252
 253                 [TK_M_ACTION] =                 "M ACTION",
 254                 [TK_M_DEVPATH] =                "M DEVPATH",
 255                 [TK_M_KERNEL] =                 "M KERNEL",
 256                 [TK_M_DEVLINK] =                "M DEVLINK",
 257                 [TK_M_NAME] =                   "M NAME",
 258                 [TK_M_ENV] =                    "M ENV",
 259                 [TK_M_SUBSYSTEM] =              "M SUBSYSTEM",
 260                 [TK_M_DRIVER] =                 "M DRIVER",
 261                 [TK_M_WAITFOR] =                "M WAITFOR",
 262                 [TK_M_ATTR] =                   "M ATTR",
 263
 264                 [TK_M_PARENTS_MIN] =            "M PARENTS_MIN",
 265                 [TK_M_KERNELS] =                "M KERNELS",
 266                 [TK_M_SUBSYSTEMS] =             "M SUBSYSTEMS",
 267                 [TK_M_DRIVERS] =                "M DRIVERS",
 268                 [TK_M_ATTRS] =                  "M ATTRS",
 269                 [TK_M_PARENTS_MAX] =            "M PARENTS_MAX",
 270
 271                 [TK_M_TEST] =                   "M TEST",
 272                 [TK_M_PROGRAM] =                "M PROGRAM",
 273                 [TK_M_IMPORT_FILE] =            "M IMPORT_FILE",
 274                 [TK_M_IMPORT_PROG] =            "M IMPORT_PROG",
 275                 [TK_M_IMPORT_PARENT] =          "M IMPORT_PARENT",
 276                 [TK_M_RESULT] =                 "M RESULT",
 277                 [TK_M_MAX] =                    "M MAX",
 278
 279                 [TK_A_IGNORE_DEVICE] =          "A IGNORE_DEVICE",
 280                 [TK_A_STRING_ESCAPE_NONE] =     "A STRING_ESCAPE_NONE",
 281                 [TK_A_STRING_ESCAPE_REPLACE] =  "A STRING_ESCAPE_REPLACE",
 282                 [TK_A_INOTIFY_WATCH] =          "A INOTIFY_WATCH",
 283                 [TK_A_NUM_FAKE_PART] =          "A NUM_FAKE_PART",
 284                 [TK_A_DEVLINK_PRIO] =           "A DEVLINK_PRIO",
 285                 [TK_A_OWNER] =                  "A OWNER",
 286                 [TK_A_GROUP] =                  "A GROUP",
 287                 [TK_A_MODE] =                   "A MODE",
 288                 [TK_A_OWNER_ID] =               "A OWNER_ID",
 289                 [TK_A_GROUP_ID] =               "A GROUP_ID",
 290                 [TK_A_MODE_ID] =                "A MODE_ID",
 291                 [TK_A_ENV] =                    "A ENV",
 292                 [TK_A_NAME] =                   "A NAME",
 293                 [TK_A_DEVLINK] =                "A DEVLINK",
 294                 [TK_A_EVENT_TIMEOUT] =          "A EVENT_TIMEOUT",
 295                 [TK_A_IGNORE_REMOVE] =          "A IGNORE_REMOVE",
 296                 [TK_A_ATTR] =                   "A ATTR",
 297                 [TK_A_RUN] =                    "A RUN",
 298                 [TK_A_GOTO] =                   "A GOTO",
 299                 [TK_A_LAST_RULE] =              "A LAST_RULE",
 300
 301                 [TK_END] =                      "END",
 302         };
 303
 304         return token_strs[type];
 305 }
 306
 307 static void dump_token(struct udev_rules *rules, struct token *token)
 308 {
 309         enum token_type type = token->type;
 310         enum operation_type op = token->key.op;
 311         enum string_glob_type glob = token->key.glob;
 312         const char *value = &rules->buf[token->key.value_off];
 313         const char *attr = &rules->buf[token->key.attr_off];
 314
 315         switch (type) {
 316         case TK_RULE:
 317                 {
 318                         const char *tks_ptr = (char *)rules->tokens;
 319                         const char *tk_ptr = (char *)token;
 320                         unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
 321
 322                         dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
 323                             &rules->buf[token->rule.filename_off], token->rule.filename_line,
 324                             idx, token->rule.token_count,
 325                             &rules->buf[token->rule.label_off],
 326                             token->rule.flags);
 327                         break;
 328                 }
 329         case TK_M_ACTION:
 330         case TK_M_DEVPATH:
 331         case TK_M_KERNEL:
 332         case TK_M_SUBSYSTEM:
 333         case TK_M_DRIVER:
 334         case TK_M_WAITFOR:
 335         case TK_M_DEVLINK:
 336         case TK_M_NAME:
 337         case TK_M_KERNELS:
 338         case TK_M_SUBSYSTEMS:
 339         case TK_M_DRIVERS:
 340         case TK_M_PROGRAM:
 341         case TK_M_IMPORT_FILE:
 342         case TK_M_IMPORT_PROG:
 343         case TK_M_IMPORT_PARENT:
 344         case TK_M_RESULT:
 345         case TK_A_NAME:
 346         case TK_A_DEVLINK:
 347         case TK_A_OWNER:
 348         case TK_A_GROUP:
 349         case TK_A_MODE:
 350         case TK_A_RUN:
 351                 dbg(rules->udev, "%s %s '%s'(%s)\n",
 352                     token_str(type), operation_str(op), value, string_glob_str(glob));
 353                 break;
 354         case TK_M_ATTR:
 355         case TK_M_ATTRS:
 356         case TK_M_ENV:
 357         case TK_A_ATTR:
 358         case TK_A_ENV:
 359                 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
 360                     token_str(type), operation_str(op), attr, value, string_glob_str(glob));
 361                 break;
 362         case TK_A_IGNORE_DEVICE:
 363         case TK_A_STRING_ESCAPE_NONE:
 364         case TK_A_STRING_ESCAPE_REPLACE:
 365         case TK_A_LAST_RULE:
 366         case TK_A_IGNORE_REMOVE:
 367                 dbg(rules->udev, "%s\n", token_str(type));
 368                 break;
 369         case TK_M_TEST:
 370                 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
 371                     token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
 372                 break;
 373         case TK_A_INOTIFY_WATCH:
 374                 dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch);
 375                 break;
 376         case TK_A_NUM_FAKE_PART:
 377                 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
 378                 break;
 379         case TK_A_DEVLINK_PRIO:
 380                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
 381                 break;
 382         case TK_A_OWNER_ID:
 383                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
 384                 break;
 385         case TK_A_GROUP_ID:
 386                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
 387                 break;
 388         case TK_A_MODE_ID:
 389                 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
 390                 break;
 391         case TK_A_EVENT_TIMEOUT:
 392                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
 393                 break;
 394         case TK_A_GOTO:
 395                 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
 396                 break;
 397         case TK_END:
 398                 dbg(rules->udev, "* %s\n", token_str(type));
 399                 break;
 400         case TK_M_PARENTS_MIN:
 401         case TK_M_PARENTS_MAX:
 402         case TK_M_MAX:
 403         case TK_UNSET:
 404                 dbg(rules->udev, "unknown type %u\n", type);
 405                 break;
 406         }
 407 }
 408
 409 static void dump_rules(struct udev_rules *rules)
 410 {
 411         unsigned int i;
 412
 413         dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
 414             rules->token_cur,
 415             rules->token_cur * sizeof(struct token),
 416             rules->buf_count,
 417             rules->buf_cur);
 418         for(i = 0; i < rules->token_cur; i++)
 419                 dump_token(rules, &rules->tokens[i]);
 420 }
 421 #else
 422 static inline const char *operation_str(enum operation_type type) { return NULL; }
 423 static inline const char *token_str(enum token_type type) { return NULL; }
 424 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
 425 static inline void dump_rules(struct udev_rules *rules) {}
 426 #endif /* ENABLE_DEBUG */
 427
 428 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
 429 {
 430         int off;
 431
 432         /* grow buffer if needed */
 433         if (rules->buf_cur + bytes+1 >= rules->buf_max) {
 434                 char *buf;
 435                 unsigned int add;
 436
 437                 /* double the buffer size */
 438                 add = rules->buf_max;
 439                 if (add < bytes * 8)
 440                         add = bytes * 8;
 441
 442                 buf = realloc(rules->buf, rules->buf_max + add);
 443                 if (buf == NULL)
 444                         return -1;
 445                 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
 446                 rules->buf = buf;
 447                 rules->buf_max += add;
 448         }
 449         off = rules->buf_cur;
 450         memcpy(&rules->buf[rules->buf_cur], str, bytes);
 451         rules->buf_cur += bytes;
 452         rules->buf_count++;
 453         return off;
 454 }
 455
 456 static int add_string(struct udev_rules *rules, const char *str)
 457 {
 458         unsigned int node_idx;
 459         struct trie_node *new_node;
 460         unsigned int new_node_idx;
 461         unsigned char key;
 462         unsigned short len;
 463         unsigned int depth;
 464         unsigned int off;
 465         struct trie_node *parent;
 466
 467         /* walk trie, start from last character of str to find matching tails */
 468         len = strlen(str);
 469         key = str[len-1];
 470         node_idx = 0;
 471         for (depth = 0; depth <= len; depth++) {
 472                 struct trie_node *node;
 473                 unsigned int child_idx;
 474
 475                 node = &rules->trie_nodes[node_idx];
 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                         struct trie_node *child;
 487
 488                         child = &rules->trie_nodes[child_idx];
 489                         if (child->key == key)
 490                                 break;
 491                         child_idx = child->next_child_idx;
 492                 }
 493                 if (child_idx == 0)
 494                         break;
 495                 node_idx = child_idx;
 496         }
 497
 498         /* string not found, add it */
 499         off = add_new_string(rules, str, len + 1);
 500
 501         /* grow trie nodes if needed */
 502         if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
 503                 struct trie_node *nodes;
 504                 unsigned int add;
 505
 506                 /* double the buffer size */
 507                 add = rules->trie_nodes_max;
 508                 if (add < 8)
 509                         add = 8;
 510
 511                 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
 512                 if (nodes == NULL)
 513                         return -1;
 514                 dbg(rules->udev, "extend trie nodes from %u to %u\n",
 515                     rules->trie_nodes_max, rules->trie_nodes_max + add);
 516                 rules->trie_nodes = nodes;
 517                 rules->trie_nodes_max += add;
 518         }
 519
 520         /* get a new node */
 521         new_node_idx = rules->trie_nodes_cur;
 522         rules->trie_nodes_cur++;
 523         new_node = &rules->trie_nodes[new_node_idx];
 524         memset(new_node, 0x00, sizeof(struct trie_node));
 525         new_node->value_off = off;
 526         new_node->value_len = len;
 527         new_node->key = key;
 528
 529         /* join the parent's child list */
 530         parent = &rules->trie_nodes[node_idx];
 531         if (parent->child_idx == 0) {
 532                 parent->child_idx = new_node_idx;
 533         } else {
 534                 struct trie_node *last_child;
 535
 536                 last_child = &rules->trie_nodes[parent->last_child_idx];
 537                 last_child->next_child_idx = new_node_idx;
 538         }
 539         parent->last_child_idx = new_node_idx;
 540         return off;
 541 }
 542
 543 static int add_token(struct udev_rules *rules, struct token *token)
 544 {
 545         /* grow buffer if needed */
 546         if (rules->token_cur+1 >= rules->token_max) {
 547                 struct token *tokens;
 548                 unsigned int add;
 549
 550                 /* double the buffer size */
 551                 add = rules->token_max;
 552                 if (add < 8)
 553                         add = 8;
 554
 555                 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
 556                 if (tokens == NULL)
 557                         return -1;
 558                 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
 559                 rules->tokens = tokens;
 560                 rules->token_max += add;
 561         }
 562         memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
 563         rules->token_cur++;
 564         return 0;
 565 }
 566
 567 static uid_t add_uid(struct udev_rules *rules, const char *owner)
 568 {
 569         unsigned int i;
 570         uid_t uid;
 571         unsigned int off;
 572
 573         /* lookup, if we know it already */
 574         for (i = 0; i < rules->uids_cur; i++) {
 575                 off = rules->uids[i].name_off;
 576                 if (strcmp(&rules->buf[off], owner) == 0) {
 577                         uid = rules->uids[i].uid;
 578                         dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
 579                         return uid;
 580                 }
 581         }
 582         uid = util_lookup_user(rules->udev, owner);
 583
 584         /* grow buffer if needed */
 585         if (rules->uids_cur+1 >= rules->uids_max) {
 586                 struct uid_gid *uids;
 587                 unsigned int add;
 588
 589                 /* double the buffer size */
 590                 add = rules->uids_max;
 591                 if (add < 1)
 592                         add = 8;
 593
 594                 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
 595                 if (uids == NULL)
 596                         return uid;
 597                 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
 598                 rules->uids = uids;
 599                 rules->uids_max += add;
 600         }
 601         rules->uids[rules->uids_cur].uid = uid;
 602         off = add_string(rules, owner);
 603         if (off <= 0)
 604                 return uid;
 605         rules->uids[rules->uids_cur].name_off = off;
 606         rules->uids_cur++;
 607         return uid;
 608 }
 609
 610 static gid_t add_gid(struct udev_rules *rules, const char *group)
 611 {
 612         unsigned int i;
 613         gid_t gid;
 614         unsigned int off;
 615
 616         /* lookup, if we know it already */
 617         for (i = 0; i < rules->gids_cur; i++) {
 618                 off = rules->gids[i].name_off;
 619                 if (strcmp(&rules->buf[off], group) == 0) {
 620                         gid = rules->gids[i].gid;
 621                         dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
 622                         return gid;
 623                 }
 624         }
 625         gid = util_lookup_group(rules->udev, group);
 626
 627         /* grow buffer if needed */
 628         if (rules->gids_cur+1 >= rules->gids_max) {
 629                 struct uid_gid *gids;
 630                 unsigned int add;
 631
 632                 /* double the buffer size */
 633                 add = rules->gids_max;
 634                 if (add < 1)
 635                         add = 8;
 636
 637                 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
 638                 if (gids == NULL)
 639                         return gid;
 640                 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
 641                 rules->gids = gids;
 642                 rules->gids_max += add;
 643         }
 644         rules->gids[rules->gids_cur].gid = gid;
 645         off = add_string(rules, group);
 646         if (off <= 0)
 647                 return gid;
 648         rules->gids[rules->gids_cur].name_off = off;
 649         rules->gids_cur++;
 650         return gid;
 651 }
 652
 653 static int import_property_from_string(struct udev_device *dev, char *line)
 654 {
 655         struct udev *udev = udev_device_get_udev(dev);
 656         char *key;
 657         char *val;
 658         size_t len;
 659
 660         /* find key */
 661         key = line;
 662         while (isspace(key[0]))
 663                 key++;
 664
 665         /* comment or empty line */
 666         if (key[0] == '#' || key[0] == '\0')
 667                 return -1;
 668
 669         /* split key/value */
 670         val = strchr(key, '=');
 671         if (val == NULL)
 672                 return -1;
 673         val[0] = '\0';
 674         val++;
 675
 676         /* find value */
 677         while (isspace(val[0]))
 678                 val++;
 679
 680         /* terminate key */
 681         len = strlen(key);
 682         if (len == 0)
 683                 return -1;
 684         while (isspace(key[len-1]))
 685                 len--;
 686         key[len] = '\0';
 687
 688         /* terminate value */
 689         len = strlen(val);
 690         if (len == 0)
 691                 return -1;
 692         while (isspace(val[len-1]))
 693                 len--;
 694         val[len] = '\0';
 695
 696         if (len == 0)
 697                 return -1;
 698
 699         /* unquote */
 700         if (val[0] == '"' || val[0] == '\'') {
 701                 if (val[len-1] != val[0]) {
 702                         info(udev, "inconsistent quoting: '%s', skip\n", line);
 703                         return -1;
 704                 }
 705                 val[len-1] = '\0';
 706                 val++;
 707         }
 708
 709         dbg(udev, "adding '%s'='%s'\n", key, val);
 710
 711         /* handle device, renamed by external tool, returning new path */
 712         if (strcmp(key, "DEVPATH") == 0) {
 713                 char syspath[UTIL_PATH_SIZE];
 714
 715                 info(udev, "updating devpath from '%s' to '%s'\n",
 716                      udev_device_get_devpath(dev), val);
 717                 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL);
 718                 udev_device_set_syspath(dev, syspath);
 719         } else {
 720                 struct udev_list_entry *entry;
 721
 722                 entry = udev_device_add_property(dev, key, val);
 723                 /* store in db, skip private keys */
 724                 if (key[0] != '.')
 725                         udev_list_entry_set_flag(entry, 1);
 726         }
 727         return 0;
 728 }
 729
 730 static int import_file_into_properties(struct udev_device *dev, const char *filename)
 731 {
 732         FILE *f;
 733         char line[UTIL_LINE_SIZE];
 734
 735         f = fopen(filename, "r");
 736         if (f == NULL)
 737                 return -1;
 738         while (fgets(line, sizeof(line), f) != NULL)
 739                 import_property_from_string(dev, line);
 740         fclose(f);
 741         return 0;
 742 }
 743
 744 static int import_program_into_properties(struct udev_device *dev, const char *program)
 745 {
 746         struct udev *udev = udev_device_get_udev(dev);
 747         char **envp;
 748         char result[4096];
 749         size_t reslen;
 750         char *line;
 751
 752         envp = udev_device_get_properties_envp(dev);
 753         if (util_run_program(udev, program, envp, result, sizeof(result), &reslen, NULL) != 0)
 754                 return -1;
 755
 756         line = result;
 757         while (line != NULL) {
 758                 char *pos;
 759
 760                 pos = strchr(line, '\n');
 761                 if (pos != NULL) {
 762                         pos[0] = '\0';
 763                         pos = &pos[1];
 764                 }
 765                 import_property_from_string(dev, line);
 766                 line = pos;
 767         }
 768         return 0;
 769 }
 770
 771 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
 772 {
 773         struct udev *udev = udev_device_get_udev(dev);
 774         struct udev_device *dev_parent;
 775         struct udev_list_entry *list_entry;
 776
 777         dev_parent = udev_device_get_parent(dev);
 778         if (dev_parent == NULL)
 779                 return -1;
 780
 781         dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
 782         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
 783                 const char *key = udev_list_entry_get_name(list_entry);
 784                 const char *val = udev_list_entry_get_value(list_entry);
 785
 786                 if (fnmatch(filter, key, 0) == 0) {
 787                         struct udev_list_entry *entry;
 788
 789                         dbg(udev, "import key '%s=%s'\n", key, val);
 790                         entry = udev_device_add_property(dev, key, val);
 791                         /* store in db, skip private keys */
 792                         if (key[0] != '.')
 793                                 udev_list_entry_set_flag(entry, 1);
 794                 }
 795         }
 796         return 0;
 797 }
 798
 799 #define WAIT_LOOP_PER_SECOND            50
 800 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
 801 {
 802         struct udev *udev = udev_device_get_udev(dev);
 803         char filepath[UTIL_PATH_SIZE];
 804         char devicepath[UTIL_PATH_SIZE];
 805         struct stat stats;
 806         int loop = timeout * WAIT_LOOP_PER_SECOND;
 807
 808         /* a relative path is a device attribute */
 809         devicepath[0] = '\0';
 810         if (file[0] != '/') {
 811                 util_strscpyl(devicepath, sizeof(devicepath),
 812                               udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL);
 813                 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
 814                 file = filepath;
 815         }
 816
 817         dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
 818         while (--loop) {
 819                 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
 820
 821                 /* lookup file */
 822                 if (stat(file, &stats) == 0) {
 823                         info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
 824                         return 0;
 825                 }
 826                 /* make sure, the device did not disappear in the meantime */
 827                 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
 828                         info(udev, "device disappeared while waiting for '%s'\n", file);
 829                         return -2;
 830                 }
 831                 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
 832                 nanosleep(&duration, NULL);
 833         }
 834         info(udev, "waiting for '%s' failed\n", file);
 835         return -1;
 836 }
 837
 838 static int attr_subst_subdir(char *attr, size_t len)
 839 {
 840         int found = 0;
 841
 842         if (strstr(attr, "/*/")) {
 843                 char *pos;
 844                 char dirname[UTIL_PATH_SIZE];
 845                 const char *tail;
 846                 DIR *dir;
 847
 848                 util_strscpy(dirname, sizeof(dirname), attr);
 849                 pos = strstr(dirname, "/*/");
 850                 if (pos == NULL)
 851                         return -1;
 852                 pos[0] = '\0';
 853                 tail = &pos[2];
 854                 dir = opendir(dirname);
 855                 if (dir != NULL) {
 856                         struct dirent *dent;
 857
 858                         for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 859                                 struct stat stats;
 860
 861                                 if (dent->d_name[0] == '.')
 862                                         continue;
 863                                 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
 864                                 if (stat(attr, &stats) == 0) {
 865                                         found = 1;
 866                                         break;
 867                                 }
 868                         }
 869                         closedir(dir);
 870                 }
 871         }
 872
 873         return found;
 874 }
 875
 876 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
 877 {
 878         char *linepos;
 879         char *temp;
 880
 881         linepos = *line;
 882         if (linepos == NULL || linepos[0] == '\0')
 883                 return -1;
 884
 885         /* skip whitespace */
 886         while (isspace(linepos[0]) || linepos[0] == ',')
 887                 linepos++;
 888
 889         /* get the key */
 890         if (linepos[0] == '\0')
 891                 return -1;
 892         *key = linepos;
 893
 894         while (1) {
 895                 linepos++;
 896                 if (linepos[0] == '\0')
 897                         return -1;
 898                 if (isspace(linepos[0]))
 899                         break;
 900                 if (linepos[0] == '=')
 901                         break;
 902                 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
 903                         if (linepos[1] == '=')
 904                                 break;
 905         }
 906
 907         /* remember end of key */
 908         temp = linepos;
 909
 910         /* skip whitespace after key */
 911         while (isspace(linepos[0]))
 912                 linepos++;
 913         if (linepos[0] == '\0')
 914                 return -1;
 915
 916         /* get operation type */
 917         if (linepos[0] == '=' && linepos[1] == '=') {
 918                 *op = OP_MATCH;
 919                 linepos += 2;
 920         } else if (linepos[0] == '!' && linepos[1] == '=') {
 921                 *op = OP_NOMATCH;
 922                 linepos += 2;
 923         } else if (linepos[0] == '+' && linepos[1] == '=') {
 924                 *op = OP_ADD;
 925                 linepos += 2;
 926         } else if (linepos[0] == '=') {
 927                 *op = OP_ASSIGN;
 928                 linepos++;
 929         } else if (linepos[0] == ':' && linepos[1] == '=') {
 930                 *op = OP_ASSIGN_FINAL;
 931                 linepos += 2;
 932         } else
 933                 return -1;
 934
 935         /* terminate key */
 936         temp[0] = '\0';
 937
 938         /* skip whitespace after operator */
 939         while (isspace(linepos[0]))
 940                 linepos++;
 941         if (linepos[0] == '\0')
 942                 return -1;
 943
 944         /* get the value */
 945         if (linepos[0] == '"')
 946                 linepos++;
 947         else
 948                 return -1;
 949         *value = linepos;
 950
 951         /* terminate */
 952         temp = strchr(linepos, '"');
 953         if (!temp)
 954                 return -1;
 955         temp[0] = '\0';
 956         temp++;
 957         dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
 958
 959         /* move line to next key */
 960         *line = temp;
 961         return 0;
 962 }
 963
 964 /* extract possible KEY{attr} */
 965 static char *get_key_attribute(struct udev *udev, char *str)
 966 {
 967         char *pos;
 968         char *attr;
 969
 970         attr = strchr(str, '{');
 971         if (attr != NULL) {
 972                 attr++;
 973                 pos = strchr(attr, '}');
 974                 if (pos == NULL) {
 975                         err(udev, "missing closing brace for format\n");
 976                         return NULL;
 977                 }
 978                 pos[0] = '\0';
 979                 dbg(udev, "attribute='%s'\n", attr);
 980                 return attr;
 981         }
 982         return NULL;
 983 }
 984
 985 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
 986                         enum operation_type op,
 987                         const char *value, const void *data)
 988 {
 989         struct token *token = &rule_tmp->token[rule_tmp->token_cur];
 990         const char *attr = NULL;
 991
 992         memset(token, 0x00, sizeof(struct token));
 993
 994         switch (type) {
 995         case TK_M_ACTION:
 996         case TK_M_DEVPATH:
 997         case TK_M_KERNEL:
 998         case TK_M_SUBSYSTEM:
 999         case TK_M_DRIVER:
1000         case TK_M_WAITFOR:
1001         case TK_M_DEVLINK:
1002         case TK_M_NAME:
1003         case TK_M_KERNELS:
1004         case TK_M_SUBSYSTEMS:
1005         case TK_M_DRIVERS:
1006         case TK_M_PROGRAM:
1007         case TK_M_IMPORT_FILE:
1008         case TK_M_IMPORT_PROG:
1009         case TK_M_IMPORT_PARENT:
1010         case TK_M_RESULT:
1011         case TK_A_OWNER:
1012         case TK_A_GROUP:
1013         case TK_A_MODE:
1014         case TK_A_NAME:
1015         case TK_A_GOTO:
1016                 token->key.value_off = add_string(rule_tmp->rules, value);
1017                 break;
1018         case TK_M_ENV:
1019         case TK_M_ATTR:
1020         case TK_M_ATTRS:
1021         case TK_A_ATTR:
1022         case TK_A_ENV:
1023                 attr = data;
1024                 token->key.value_off = add_string(rule_tmp->rules, value);
1025                 token->key.attr_off = add_string(rule_tmp->rules, attr);
1026                 break;
1027         case TK_A_DEVLINK:
1028                 token->key.value_off = add_string(rule_tmp->rules, value);
1029                 token->key.devlink_unique = *(int *)data;
1030                 break;
1031         case TK_M_TEST:
1032                 token->key.value_off = add_string(rule_tmp->rules, value);
1033                 if (data != NULL)
1034                         token->key.mode = *(mode_t *)data;
1035                 break;
1036         case TK_A_IGNORE_DEVICE:
1037         case TK_A_STRING_ESCAPE_NONE:
1038         case TK_A_STRING_ESCAPE_REPLACE:
1039         case TK_A_IGNORE_REMOVE:
1040         case TK_A_LAST_RULE:
1041                 break;
1042         case TK_A_RUN:
1043                 token->key.value_off = add_string(rule_tmp->rules, value);
1044                 token->key.fail_on_error = *(int *)data;
1045                 break;
1046         case TK_A_INOTIFY_WATCH:
1047         case TK_A_NUM_FAKE_PART:
1048         case TK_A_DEVLINK_PRIO:
1049                 token->key.devlink_prio = *(int *)data;
1050                 break;
1051         case TK_A_OWNER_ID:
1052                 token->key.uid = *(uid_t *)data;
1053                 break;
1054         case TK_A_GROUP_ID:
1055                 token->key.gid = *(gid_t *)data;
1056                 break;
1057         case TK_A_MODE_ID:
1058                 token->key.mode = *(mode_t *)data;
1059                 break;
1060         case TK_A_EVENT_TIMEOUT:
1061                 token->key.event_timeout = *(int *)data;
1062                 break;
1063         case TK_RULE:
1064         case TK_M_PARENTS_MIN:
1065         case TK_M_PARENTS_MAX:
1066         case TK_M_MAX:
1067         case TK_END:
1068         case TK_UNSET:
1069                 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1070                 return -1;
1071         }
1072
1073         if (value != NULL && type < TK_M_MAX) {
1074                 /* check if we need to split or call fnmatch() while matching rules */
1075                 enum string_glob_type glob;
1076                 int has_split;
1077                 int has_glob;
1078
1079                 has_split = (strchr(value, '|') != NULL);
1080                 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1081                 if (has_split && has_glob) {
1082                         glob = GL_SPLIT_GLOB;
1083                 } else if (has_split) {
1084                         glob = GL_SPLIT;
1085                 } else if (has_glob) {
1086                         if (strcmp(value, "?*") == 0)
1087                                 glob = GL_SOMETHING;
1088                         else
1089                                 glob = GL_GLOB;
1090                 } else {
1091                         glob = GL_PLAIN;
1092                 }
1093                 token->key.glob = glob;
1094         }
1095
1096         if (value != NULL && type > TK_M_MAX) {
1097                 /* check if assigned value has substitution chars */
1098                 if (value[0] == '[')
1099                         token->key.subst = SB_SUBSYS;
1100                 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1101                         token->key.subst = SB_FORMAT;
1102                 else
1103                         token->key.subst = SB_NONE;
1104         }
1105
1106         if (attr != NULL) {
1107                 /* check if property/attribut name has substitution chars */
1108                 if (attr[0] == '[')
1109                         token->key.attrsubst = SB_SUBSYS;
1110                 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1111                         token->key.attrsubst = SB_FORMAT;
1112                 else
1113                         token->key.attrsubst = SB_NONE;
1114         }
1115
1116         token->key.type = type;
1117         token->key.op = op;
1118         rule_tmp->token_cur++;
1119         if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1120                 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1121                 return -1;
1122         }
1123         return 0;
1124 }
1125
1126 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1127 {
1128         unsigned int i;
1129         unsigned int start = 0;
1130         unsigned int end = rule_tmp->token_cur;
1131
1132         for (i = 0; i < rule_tmp->token_cur; i++) {
1133                 enum token_type next_val = TK_UNSET;
1134                 unsigned int next_idx = 0;
1135                 unsigned int j;
1136
1137                 /* find smallest value */
1138                 for (j = start; j < end; j++) {
1139                         if (rule_tmp->token[j].type == TK_UNSET)
1140                                 continue;
1141                         if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1142                                 next_val = rule_tmp->token[j].type;
1143                                 next_idx = j;
1144                         }
1145                 }
1146
1147                 /* add token and mark done */
1148                 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1149                         return -1;
1150                 rule_tmp->token[next_idx].type = TK_UNSET;
1151
1152                 /* shrink range */
1153                 if (next_idx == start)
1154                         start++;
1155                 if (next_idx+1 == end)
1156                         end--;
1157         }
1158         return 0;
1159 }
1160
1161 static int add_rule(struct udev_rules *rules, char *line,
1162                     const char *filename, unsigned int filename_off, unsigned int lineno)
1163 {
1164         char *linepos;
1165         char *attr;
1166         struct rule_tmp rule_tmp;
1167
1168         memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1169         rule_tmp.rules = rules;
1170         rule_tmp.rule.type = TK_RULE;
1171         rule_tmp.rule.rule.filename_off = filename_off;
1172         rule_tmp.rule.rule.filename_line = lineno;
1173
1174         linepos = line;
1175         while (1) {
1176                 char *key;
1177                 char *value;
1178                 enum operation_type op;
1179
1180                 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1181                         break;
1182
1183                 if (strcmp(key, "ACTION") == 0) {
1184                         if (op > OP_MATCH_MAX) {
1185                                 err(rules->udev, "invalid ACTION operation\n");
1186                                 goto invalid;
1187                         }
1188                         rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1189                         continue;
1190                 }
1191
1192                 if (strcmp(key, "DEVPATH") == 0) {
1193                         if (op > OP_MATCH_MAX) {
1194                                 err(rules->udev, "invalid DEVPATH operation\n");
1195                                 goto invalid;
1196                         }
1197                         rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1198                         continue;
1199                 }
1200
1201                 if (strcmp(key, "KERNEL") == 0) {
1202                         if (op > OP_MATCH_MAX) {
1203                                 err(rules->udev, "invalid KERNEL operation\n");
1204                                 goto invalid;
1205                         }
1206                         rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1207                         continue;
1208                 }
1209
1210                 if (strcmp(key, "SUBSYSTEM") == 0) {
1211                         if (op > OP_MATCH_MAX) {
1212                                 err(rules->udev, "invalid SUBSYSTEM operation\n");
1213                                 goto invalid;
1214                         }
1215                         /* bus, class, subsystem events should all be the same */
1216                         if (strcmp(value, "subsystem") == 0 ||
1217                             strcmp(value, "bus") == 0 ||
1218                             strcmp(value, "class") == 0) {
1219                                 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1220                                         err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1221                                             "please fix it in %s:%u", value, filename, lineno);
1222                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1223                         } else
1224                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1225                         continue;
1226                 }
1227
1228                 if (strcmp(key, "DRIVER") == 0) {
1229                         if (op > OP_MATCH_MAX) {
1230                                 err(rules->udev, "invalid DRIVER operation\n");
1231                                 goto invalid;
1232                         }
1233                         rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1234                         continue;
1235                 }
1236
1237                 if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1238                         attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1239                         if (attr == NULL) {
1240                                 err(rules->udev, "error parsing ATTR attribute\n");
1241                                 goto invalid;
1242                         }
1243                         if (op < OP_MATCH_MAX) {
1244                                 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1245                         } else {
1246                                 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1247                         }
1248                         continue;
1249                 }
1250
1251                 if (strcmp(key, "KERNELS") == 0 ||
1252                     strcmp(key, "ID") == 0) {
1253                         if (op > OP_MATCH_MAX) {
1254                                 err(rules->udev, "invalid KERNELS operation\n");
1255                                 goto invalid;
1256                         }
1257                         rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1258                         continue;
1259                 }
1260
1261                 if (strcmp(key, "SUBSYSTEMS") == 0 ||
1262                     strcmp(key, "BUS") == 0) {
1263                         if (op > OP_MATCH_MAX) {
1264                                 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1265                                 goto invalid;
1266                         }
1267                         rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1268                         continue;
1269                 }
1270
1271                 if (strcmp(key, "DRIVERS") == 0) {
1272                         if (op > OP_MATCH_MAX) {
1273                                 err(rules->udev, "invalid DRIVERS operation\n");
1274                                 goto invalid;
1275                         }
1276                         rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1277                         continue;
1278                 }
1279
1280                 if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1281                     strncmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1282                         if (op > OP_MATCH_MAX) {
1283                                 err(rules->udev, "invalid ATTRS operation\n");
1284                                 goto invalid;
1285                         }
1286                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1287                         if (attr == NULL) {
1288                                 err(rules->udev, "error parsing ATTRS attribute\n");
1289                                 goto invalid;
1290                         }
1291                         if (strncmp(attr, "device/", 7) == 0)
1292                                 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1293                                     "please fix it in %s:%u", filename, lineno);
1294                         else if (strstr(attr, "../") != NULL)
1295                                 err(rules->udev, "do not reference parent sysfs directories directly, "
1296                                     "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1297                         rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1298                         continue;
1299                 }
1300
1301                 if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1302                         attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1303                         if (attr == NULL) {
1304                                 err(rules->udev, "error parsing ENV attribute\n");
1305                                 goto invalid;
1306                         }
1307                         if (op < OP_MATCH_MAX) {
1308                                 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1309                                         goto invalid;
1310                         } else {
1311                                 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1312                                         goto invalid;
1313                         }
1314                         continue;
1315                 }
1316
1317                 if (strcmp(key, "PROGRAM") == 0) {
1318                         rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1319                         continue;
1320                 }
1321
1322                 if (strcmp(key, "RESULT") == 0) {
1323                         if (op > OP_MATCH_MAX) {
1324                                 err(rules->udev, "invalid RESULT operation\n");
1325                                 goto invalid;
1326                         }
1327                         rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1328                         continue;
1329                 }
1330
1331                 if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1332                         attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1333                         if (attr != NULL && strstr(attr, "program")) {
1334                                 dbg(rules->udev, "IMPORT will be executed\n");
1335                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1336                         } else if (attr != NULL && strstr(attr, "file")) {
1337                                 dbg(rules->udev, "IMPORT will be included as file\n");
1338                                 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1339                         } else if (attr != NULL && strstr(attr, "parent")) {
1340                                 dbg(rules->udev, "IMPORT will include the parent values\n");
1341                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1342                         } else {
1343                                 /* figure it out if it is executable */
1344                                 char file[UTIL_PATH_SIZE];
1345                                 char *pos;
1346                                 struct stat statbuf;
1347
1348                                 /* allow programs in /lib/udev called without the path */
1349                                 if (value[0] != '/')
1350                                         util_strscpyl(file, sizeof(file), LIBEXECDIR "/", value, NULL);
1351                                 else
1352                                         util_strscpy(file, sizeof(file), value);
1353                                 pos = strchr(file, ' ');
1354                                 if (pos)
1355                                         pos[0] = '\0';
1356                                 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1357                                 if (stat(file, &statbuf) == 0 && (statbuf.st_mode & S_IXUSR)) {
1358                                         dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1359                                         rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1360                                 } else {
1361                                         dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1362                                         rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1363                                 }
1364                         }
1365                         continue;
1366                 }
1367
1368                 if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) {
1369                         mode_t mode = 0;
1370
1371                         if (op > OP_MATCH_MAX) {
1372                                 err(rules->udev, "invalid TEST operation\n");
1373                                 goto invalid;
1374                         }
1375                         attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1376                         if (attr != NULL) {
1377                                 mode = strtol(attr, NULL, 8);
1378                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1379                         } else {
1380                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1381                         }
1382                         continue;
1383                 }
1384
1385                 if (strncmp(key, "RUN", sizeof("RUN")-1) == 0) {
1386                         int flag = 0;
1387
1388                         attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1389                         if (attr != NULL && strstr(attr, "fail_event_on_error"))
1390                                 flag = 1;
1391                         rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1392                         continue;
1393                 }
1394
1395                 if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) {
1396                         rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1397                         continue;
1398                 }
1399
1400                 if (strcmp(key, "LABEL") == 0) {
1401                         rule_tmp.rule.rule.label_off = add_string(rules, value);
1402                         continue;
1403                 }
1404
1405                 if (strcmp(key, "GOTO") == 0) {
1406                         rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1407                         continue;
1408                 }
1409
1410                 if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) {
1411                         if (op < OP_MATCH_MAX) {
1412                                 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1413                         } else {
1414                                 if (value[0] == '\0')
1415                                         info(rules->udev, "name empty, node creation suppressed\n");
1416                                 else if (strcmp(value, "%k") == 0)
1417                                         err(rules->udev, "NAME=\"%%k\" is superfluous and breaks "
1418                                             "kernel supplied names, please remove it from %s:%u\n", filename, lineno);
1419                                 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1420                                 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1421                                 if (attr != NULL) {
1422                                         if (strstr(attr, "all_partitions") != NULL) {
1423                                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1424
1425                                                 dbg(rules->udev, "creation of partition nodes requested\n");
1426                                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1427                                         }
1428                                         if (strstr(attr, "ignore_remove") != NULL) {
1429                                                 dbg(rules->udev, "remove event should be ignored\n");
1430                                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1431                                         }
1432                                 }
1433                         }
1434                         rule_tmp.rule.rule.flags = 1;
1435                         continue;
1436                 }
1437
1438                 if (strcmp(key, "SYMLINK") == 0) {
1439                         if (op < OP_MATCH_MAX) {
1440                                 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1441                         } else {
1442                                 int flag = 0;
1443
1444                                 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1445                                 if (attr != NULL && strstr(attr, "unique") != NULL)
1446                                         flag = 1;
1447                                 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1448                         }
1449                         rule_tmp.rule.rule.flags = 1;
1450                         continue;
1451                 }
1452
1453                 if (strcmp(key, "OWNER") == 0) {
1454                         uid_t uid;
1455                         char *endptr;
1456
1457                         uid = strtoul(value, &endptr, 10);
1458                         if (endptr[0] == '\0') {
1459                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1460                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1461                                 uid = add_uid(rules, value);
1462                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1463                         } else if (rules->resolve_names >= 0) {
1464                                 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1465                         }
1466                         rule_tmp.rule.rule.flags = 1;
1467                         continue;
1468                 }
1469
1470                 if (strcmp(key, "GROUP") == 0) {
1471                         gid_t gid;
1472                         char *endptr;
1473
1474                         gid = strtoul(value, &endptr, 10);
1475                         if (endptr[0] == '\0') {
1476                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1477                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1478                                 gid = add_gid(rules, value);
1479                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1480                         } else if (rules->resolve_names >= 0) {
1481                                 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1482                         }
1483                         rule_tmp.rule.rule.flags = 1;
1484                         continue;
1485                 }
1486
1487                 if (strcmp(key, "MODE") == 0) {
1488                         mode_t mode;
1489                         char *endptr;
1490
1491                         mode = strtol(value, &endptr, 8);
1492                         if (endptr[0] == '\0')
1493                                 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1494                         else
1495                                 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1496                         rule_tmp.rule.rule.flags = 1;
1497                         continue;
1498                 }
1499
1500                 if (strcmp(key, "OPTIONS") == 0) {
1501                         const char *pos;
1502
1503                         if (strstr(value, "last_rule") != NULL) {
1504                                 dbg(rules->udev, "last rule to be applied\n");
1505                                 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1506                         }
1507                         if (strstr(value, "ignore_device") != NULL) {
1508                                 dbg(rules->udev, "device should be ignored\n");
1509                                 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1510                         }
1511                         if (strstr(value, "ignore_remove") != NULL) {
1512                                 dbg(rules->udev, "remove event should be ignored\n");
1513                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1514                         }
1515                         pos = strstr(value, "link_priority=");
1516                         if (pos != NULL) {
1517                                 int prio = atoi(&pos[strlen("link_priority=")]);
1518
1519                                 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1520                                 dbg(rules->udev, "link priority=%i\n", prio);
1521                         }
1522                         pos = strstr(value, "event_timeout=");
1523                         if (pos != NULL) {
1524                                 int tout = atoi(&pos[strlen("event_timeout=")]);
1525
1526                                 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1527                                 dbg(rules->udev, "event timeout=%i\n", tout);
1528                         }
1529                         pos = strstr(value, "string_escape=");
1530                         if (pos != NULL) {
1531                                 pos = &pos[strlen("string_escape=")];
1532                                 if (strncmp(pos, "none", strlen("none")) == 0)
1533                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1534                                 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1535                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1536                         }
1537                         if (strstr(value, "all_partitions") != NULL) {
1538                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1539
1540                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1541                                 dbg(rules->udev, "creation of partition nodes requested\n");
1542                         }
1543                         pos = strstr(value, "nowatch");
1544                         if (pos != NULL) {
1545                                 const int off = 0;
1546
1547                                 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &off);
1548                                 dbg(rules->udev, "inotify watch of device disabled\n");
1549                         } else {
1550                                 pos = strstr(value, "watch");
1551                                 if (pos != NULL) {
1552                                         const int on = 1;
1553
1554                                         rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &on);
1555                                         dbg(rules->udev, "inotify watch of device requested\n");
1556                                 }
1557                         }
1558                         continue;
1559                 }
1560                 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1561         }
1562
1563         /* add rule token */
1564         rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1565         if (add_token(rules, &rule_tmp.rule) != 0)
1566                 goto invalid;
1567
1568         /* add tokens to list, sorted by type */
1569         if (sort_token(rules, &rule_tmp) != 0)
1570                 goto invalid;
1571
1572         return 0;
1573 invalid:
1574         err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1575         return -1;
1576 }
1577
1578 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1579 {
1580         FILE *f;
1581         unsigned int first_token;
1582         char line[UTIL_LINE_SIZE];
1583         int line_nr = 0;
1584         unsigned int i;
1585
1586         info(rules->udev, "reading '%s' as rules file\n", filename);
1587
1588         f = fopen(filename, "r");
1589         if (f == NULL)
1590                 return -1;
1591
1592         first_token = rules->token_cur;
1593
1594         while (fgets(line, sizeof(line), f) != NULL) {
1595                 char *key;
1596                 size_t len;
1597
1598                 /* skip whitespace */
1599                 line_nr++;
1600                 key = line;
1601                 while (isspace(key[0]))
1602                         key++;
1603
1604                 /* comment */
1605                 if (key[0] == '#')
1606                         continue;
1607
1608                 len = strlen(line);
1609                 if (len < 3)
1610                         continue;
1611
1612                 /* continue reading if backslash+newline is found */
1613                 while (line[len-2] == '\\') {
1614                         if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1615                                 break;
1616                         if (strlen(&line[len-2]) < 2)
1617                                 break;
1618                         line_nr++;
1619                         len = strlen(line);
1620                 }
1621
1622                 if (len+1 >= sizeof(line)) {
1623                         err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1624                         continue;
1625                 }
1626                 add_rule(rules, key, filename, filename_off, line_nr);
1627         }
1628         fclose(f);
1629
1630         /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1631         for (i = first_token+1; i < rules->token_cur; i++) {
1632                 if (rules->tokens[i].type == TK_A_GOTO) {
1633                         char *label = &rules->buf[rules->tokens[i].key.value_off];
1634                         unsigned int j;
1635
1636                         for (j = i+1; j < rules->token_cur; j++) {
1637                                 if (rules->tokens[j].type != TK_RULE)
1638                                         continue;
1639                                 if (rules->tokens[j].rule.label_off == 0)
1640                                         continue;
1641                                 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1642                                         continue;
1643                                 rules->tokens[i].key.rule_goto = j;
1644                                 break;
1645                         }
1646                         if (rules->tokens[i].key.rule_goto == 0)
1647                                 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1648                 }
1649         }
1650         return 0;
1651 }
1652
1653 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1654 {
1655         DIR *dir;
1656         char filename[UTIL_PATH_SIZE];
1657
1658         dbg(udev, "open directory '%s'\n", dirname);
1659         dir = opendir(dirname);
1660         if (dir == NULL) {
1661                 info(udev, "unable to open '%s': %m\n", dirname);
1662                 return -1;
1663         }
1664
1665         while (1) {
1666                 struct dirent *dent;
1667
1668                 dent = readdir(dir);
1669                 if (dent == NULL || dent->d_name[0] == '\0')
1670                         break;
1671
1672                 if (dent->d_name[0] == '.')
1673                         continue;
1674
1675                 /* look for file matching with specified suffix */
1676                 if (suffix != NULL) {
1677                         const char *ext;
1678
1679                         ext = strrchr(dent->d_name, '.');
1680                         if (ext == NULL)
1681                                 continue;
1682                         if (strcmp(ext, suffix) != 0)
1683                                 continue;
1684                 }
1685                 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1686                 dbg(udev, "put file '%s' into list\n", filename);
1687                 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1688         }
1689
1690         closedir(dir);
1691         return 0;
1692 }
1693
1694 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1695 {
1696         struct udev_rules *rules;
1697         struct stat statbuf;
1698         struct udev_list_node file_list;
1699         struct udev_list_entry *file_loop, *file_tmp;
1700         struct token end_token;
1701
1702         rules = malloc(sizeof(struct udev_rules));
1703         if (rules == NULL)
1704                 return NULL;
1705         memset(rules, 0x00, sizeof(struct udev_rules));
1706         rules->udev = udev;
1707         rules->resolve_names = resolve_names;
1708         udev_list_init(&file_list);
1709
1710         /* init token array and string buffer */
1711         rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1712         if (rules->tokens == NULL)
1713                 return NULL;
1714         rules->token_max = PREALLOC_TOKEN;
1715
1716         rules->buf = malloc(PREALLOC_STRBUF);
1717         if (rules->buf == NULL)
1718                 return NULL;
1719         rules->buf_max = PREALLOC_STRBUF;
1720         /* offset 0 is always '\0' */
1721         rules->buf[0] = '\0';
1722         rules->buf_cur = 1;
1723         dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1724             rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1725
1726         rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1727         if (rules->trie_nodes == NULL)
1728                 return NULL;
1729         rules->trie_nodes_max = PREALLOC_TRIE;
1730         /* offset 0 is the trie root, with an empty string */
1731         memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1732         rules->trie_nodes_cur = 1;
1733
1734         if (udev_get_rules_path(udev) != NULL) {
1735                 /* custom rules location for testing */
1736                 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1737         } else {
1738                 char filename[PATH_MAX];
1739                 struct udev_list_node sort_list;
1740                 struct udev_list_entry *sort_loop, *sort_tmp;
1741
1742                 /* read user/custom rules */
1743                 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1744
1745                 /* read dynamic/temporary rules */
1746                 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
1747                 if (stat(filename, &statbuf) != 0) {
1748                         util_create_path(udev, filename);
1749                         udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1750                         mkdir(filename, 0755);
1751                         udev_selinux_resetfscreatecon(udev);
1752                 }
1753                 udev_list_init(&sort_list);
1754                 add_matching_files(udev, &sort_list, filename, ".rules");
1755
1756                 /* read default rules */
1757                 add_matching_files(udev, &sort_list, LIBEXECDIR "/rules.d", ".rules");
1758
1759                 /* sort all rules files by basename into list of files */
1760                 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1761                         const char *sort_name = udev_list_entry_get_name(sort_loop);
1762                         const char *sort_base = strrchr(sort_name, '/');
1763
1764                         if (sort_base == NULL)
1765                                 continue;
1766                         /* sort entry into existing list */
1767                         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1768                                 const char *file_name = udev_list_entry_get_name(file_loop);
1769                                 const char *file_base = strrchr(file_name, '/');
1770
1771                                 if (file_base == NULL)
1772                                         continue;
1773                                 if (strcmp(file_base, sort_base) == 0) {
1774                                         info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1775                                              file_name, sort_name);
1776                                         udev_list_entry_delete(sort_loop);
1777                                         sort_loop = NULL;
1778                                         break;
1779                                 }
1780                                 if (strcmp(file_base, sort_base) > 0) {
1781                                         /* found later file, insert before */
1782                                         udev_list_entry_remove(sort_loop);
1783                                         udev_list_entry_insert_before(sort_loop, file_loop);
1784                                         sort_loop = NULL;
1785                                         break;
1786                                 }
1787                         }
1788                         /* current file already handled */
1789                         if (sort_loop == NULL)
1790                                 continue;
1791                         /* no later file, append to end of list */
1792                         udev_list_entry_remove(sort_loop);
1793                         udev_list_entry_append(sort_loop, &file_list);
1794                 }
1795         }
1796
1797         /* add all filenames to the string buffer */
1798         udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1799                 const char *filename = udev_list_entry_get_name(file_loop);
1800                 unsigned int filename_off;
1801
1802                 filename_off = add_string(rules, filename);
1803                 /* the offset in the rule is limited to unsigned short */
1804                 if (filename_off < USHRT_MAX)
1805                         udev_list_entry_set_flag(file_loop, filename_off);
1806         }
1807
1808         /* parse list of files */
1809         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1810                 const char *filename = udev_list_entry_get_name(file_loop);
1811                 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1812
1813                 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1814                         parse_file(rules, filename, filename_off);
1815                 else
1816                         err(udev, "can not read '%s'\n", filename);
1817                 udev_list_entry_delete(file_loop);
1818         }
1819
1820         memset(&end_token, 0x00, sizeof(struct token));
1821         end_token.type = TK_END;
1822         add_token(rules, &end_token);
1823
1824         /* shrink allocated token and string buffer */
1825         if (rules->token_cur < rules->token_max) {
1826                 struct token *tokens;
1827
1828                 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1829                 if (tokens != NULL || rules->token_cur == 0) {
1830                         rules->tokens = tokens;
1831                         rules->token_max = rules->token_cur;
1832                 }
1833         }
1834         if (rules->buf_cur < rules->buf_max) {
1835                 char *buf;
1836
1837                 buf = realloc(rules->buf, rules->buf_cur);
1838                 if (buf != NULL || rules->buf_cur == 0) {
1839                         rules->buf = buf;
1840                         rules->buf_max = rules->buf_cur;
1841                 }
1842         }
1843         info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1844              rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1845         info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1846              rules->trie_nodes_cur * sizeof(struct trie_node),
1847              rules->trie_nodes_cur, sizeof(struct trie_node));
1848
1849         /* cleanup trie */
1850         free(rules->trie_nodes);
1851         rules->trie_nodes = NULL;
1852         rules->trie_nodes_cur = 0;
1853         rules->trie_nodes_max = 0;
1854
1855         /* cleanup uid/gid cache */
1856         free(rules->uids);
1857         rules->uids = NULL;
1858         rules->uids_cur = 0;
1859         rules->uids_max = 0;
1860         free(rules->gids);
1861         rules->gids = NULL;
1862         rules->gids_cur = 0;
1863         rules->gids_max = 0;
1864
1865         dump_rules(rules);
1866         return rules;
1867 }
1868
1869 void udev_rules_unref(struct udev_rules *rules)
1870 {
1871         if (rules == NULL)
1872                 return;
1873         free(rules->tokens);
1874         free(rules->buf);
1875         free(rules->trie_nodes);
1876         free(rules->uids);
1877         free(rules->gids);
1878         free(rules);
1879 }
1880
1881 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1882 {
1883         char *key_value = &rules->buf[token->key.value_off];
1884         char *pos;
1885         int match = 0;
1886
1887         if (val == NULL)
1888                 val = "";
1889
1890         switch (token->key.glob) {
1891         case GL_PLAIN:
1892                 match = (strcmp(key_value, val) == 0);
1893                 break;
1894         case GL_GLOB:
1895                 match = (fnmatch(key_value, val, 0) == 0);
1896                 break;
1897         case GL_SPLIT:
1898                 {
1899                         const char *split;
1900                         size_t len;
1901
1902                         split = &rules->buf[token->key.value_off];
1903                         len = strlen(val);
1904                         while (1) {
1905                                 const char *next;
1906
1907                                 next = strchr(split, '|');
1908                                 if (next != NULL) {
1909                                         size_t matchlen = (size_t)(next - split);
1910
1911                                         match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1912                                         if (match)
1913                                                 break;
1914                                 } else {
1915                                         match = (strcmp(split, val) == 0);
1916                                         break;
1917                                 }
1918                                 split = &next[1];
1919                         }
1920                         break;
1921                 }
1922         case GL_SPLIT_GLOB:
1923                 {
1924                         char value[UTIL_PATH_SIZE];
1925
1926                         util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1927                         key_value = value;
1928                         while (key_value != NULL) {
1929                                 pos = strchr(key_value, '|');
1930                                 if (pos != NULL) {
1931                                         pos[0] = '\0';
1932                                         pos = &pos[1];
1933                                 }
1934                                 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1935                                 match = (fnmatch(key_value, val, 0) == 0);
1936                                 if (match)
1937                                         break;
1938                                 key_value = pos;
1939                         }
1940                         break;
1941                 }
1942         case GL_SOMETHING:
1943                 match = (val[0] != '\0');
1944                 break;
1945         case GL_UNSET:
1946                 return -1;
1947         }
1948
1949         if (match && (token->key.op == OP_MATCH)) {
1950                 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1951                 return 0;
1952         }
1953         if (!match && (token->key.op == OP_NOMATCH)) {
1954                 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1955                 return 0;
1956         }
1957         dbg(rules->udev, "%s is not true\n", token_str(token->type));
1958         return -1;
1959 }
1960
1961 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1962 {
1963         const char *name;
1964         char nbuf[UTIL_NAME_SIZE];
1965         const char *value;
1966         char vbuf[UTIL_NAME_SIZE];
1967         size_t len;
1968
1969         name = &rules->buf[cur->key.attr_off];
1970         switch (cur->key.attrsubst) {
1971         case SB_FORMAT:
1972                 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1973                 name = nbuf;
1974                 /* fall through */
1975         case SB_NONE:
1976                 value = udev_device_get_sysattr_value(dev, name);
1977                 if (value == NULL)
1978                         return -1;
1979                 break;
1980         case SB_SUBSYS:
1981                 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1982                         return -1;
1983                 value = vbuf;
1984                 break;
1985         default:
1986                 return -1;
1987         }
1988
1989         /* remove trailing whitespace, if not asked to match for it */
1990         len = strlen(value);
1991         if (len > 0 && isspace(value[len-1])) {
1992                 const char *key_value;
1993                 size_t klen;
1994
1995                 key_value = &rules->buf[cur->key.value_off];
1996                 klen = strlen(key_value);
1997                 if (klen > 0 && !isspace(key_value[klen-1])) {
1998                         if (value != vbuf) {
1999                                 util_strscpy(vbuf, sizeof(vbuf), value);
2000                                 value = vbuf;
2001                         }
2002                         while (len > 0 && isspace(vbuf[--len]))
2003                                 vbuf[len] = '\0';
2004                         dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
2005                 }
2006         }
2007
2008         return match_key(rules, cur, value);
2009 }
2010
2011 enum escape_type {
2012         ESCAPE_UNSET,
2013         ESCAPE_NONE,
2014         ESCAPE_REPLACE,
2015 };
2016
2017 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
2018 {
2019         struct token *cur;
2020         struct token *rule;
2021         enum escape_type esc = ESCAPE_UNSET;
2022         int can_set_name;
2023
2024         if (rules->tokens == NULL)
2025                 return -1;
2026
2027         can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
2028                          strcmp(udev_device_get_action(event->dev), "change") == 0) &&
2029                         (major(udev_device_get_devnum(event->dev)) > 0 ||
2030                          strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
2031
2032         /* loop through token list, match, run actions or forward to next rule */
2033         cur = &rules->tokens[0];
2034         rule = cur;
2035         while (1) {
2036                 dump_token(rules, cur);
2037                 switch (cur->type) {
2038                 case TK_RULE:
2039                         /* current rule */
2040                         rule = cur;
2041                         /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2042                         if (!can_set_name && rule->rule.flags)
2043                                 goto nomatch;
2044                         esc = ESCAPE_UNSET;
2045                         break;
2046                 case TK_M_ACTION:
2047                         if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2048                                 goto nomatch;
2049                         break;
2050                 case TK_M_DEVPATH:
2051                         if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2052                                 goto nomatch;
2053                         break;
2054                 case TK_M_KERNEL:
2055                         if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2056                                 goto nomatch;
2057                         break;
2058                 case TK_M_DEVLINK:
2059                         {
2060                                 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2061                                 struct udev_list_entry *list_entry;
2062                                 int match = 0;
2063
2064                                 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2065                                         const char *devlink;
2066
2067                                         devlink =  &udev_list_entry_get_name(list_entry)[devlen];
2068                                         if (match_key(rules, cur, devlink) == 0) {
2069                                                 match = 1;
2070                                                 break;
2071                                         }
2072                                 }
2073                                 if (!match)
2074                                         goto nomatch;
2075                                 break;
2076                         }
2077                 case TK_M_NAME:
2078                         if (match_key(rules, cur, event->name) != 0)
2079                                 goto nomatch;
2080                         break;
2081                 case TK_M_ENV:
2082                         {
2083                                 const char *key_name = &rules->buf[cur->key.attr_off];
2084                                 const char *value;
2085
2086                                 value = udev_device_get_property_value(event->dev, key_name);
2087                                 if (value == NULL) {
2088                                         dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2089                                         value = "";
2090                                 }
2091                                 if (match_key(rules, cur, value))
2092                                         goto nomatch;
2093                                 break;
2094                         }
2095                 case TK_M_SUBSYSTEM:
2096                         if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2097                                 goto nomatch;
2098                         break;
2099                 case TK_M_DRIVER:
2100                         if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2101                                 goto nomatch;
2102                         break;
2103                 case TK_M_WAITFOR:
2104                         {
2105                                 char filename[UTIL_PATH_SIZE];
2106                                 int found;
2107
2108                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2109                                 found = (wait_for_file(event->dev, filename, 10) == 0);
2110                                 if (!found && (cur->key.op != OP_NOMATCH))
2111                                         goto nomatch;
2112                                 break;
2113                         }
2114                 case TK_M_ATTR:
2115                         if (match_attr(rules, event->dev, event, cur) != 0)
2116                                 goto nomatch;
2117                         break;
2118                 case TK_M_KERNELS:
2119                 case TK_M_SUBSYSTEMS:
2120                 case TK_M_DRIVERS:
2121                 case TK_M_ATTRS:
2122                         {
2123                                 struct token *next;
2124
2125                                 /* get whole sequence of parent matches */
2126                                 next = cur;
2127                                 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2128                                         next++;
2129
2130                                 /* loop over parents */
2131                                 event->dev_parent = event->dev;
2132                                 while (1) {
2133                                         struct token *key;
2134
2135                                         dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2136                                         /* loop over sequence of parent match keys */
2137                                         for (key = cur; key < next; key++ ) {
2138                                                 dump_token(rules, key);
2139                                                 switch(key->type) {
2140                                                 case TK_M_KERNELS:
2141                                                         if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2142                                                                 goto try_parent;
2143                                                         break;
2144                                                 case TK_M_SUBSYSTEMS:
2145                                                         if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2146                                                                 goto try_parent;
2147                                                         break;
2148                                                 case TK_M_DRIVERS:
2149                                                         if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2150                                                                 goto try_parent;
2151                                                         break;
2152                                                 case TK_M_ATTRS:
2153                                                         if (match_attr(rules, event->dev_parent, event, key) != 0)
2154                                                                 goto try_parent;
2155                                                         break;
2156                                                 default:
2157                                                         goto nomatch;
2158                                                 }
2159                                                 dbg(event->udev, "parent key matched\n");
2160                                         }
2161                                         dbg(event->udev, "all parent keys matched\n");
2162                                         /* all keys matched */
2163                                         break;
2164
2165                                 try_parent:
2166                                         event->dev_parent = udev_device_get_parent(event->dev_parent);
2167                                         if (event->dev_parent == NULL)
2168                                                 goto nomatch;
2169                                 }
2170                                 /* move behind our sequence of parent match keys */
2171                                 cur = next;
2172                                 continue;
2173                         }
2174                 case TK_M_TEST:
2175                         {
2176                                 char filename[UTIL_PATH_SIZE];
2177                                 struct stat statbuf;
2178                                 int match;
2179
2180                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2181                                 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2182                                         if (filename[0] != '/') {
2183                                                 char tmp[UTIL_PATH_SIZE];
2184
2185                                                 util_strscpy(tmp, sizeof(tmp), filename);
2186                                                 util_strscpyl(filename, sizeof(filename),
2187                                                               udev_device_get_syspath(event->dev), "/", tmp, NULL);
2188                                         }
2189                                 }
2190                                 attr_subst_subdir(filename, sizeof(filename));
2191
2192                                 match = (stat(filename, &statbuf) == 0);
2193                                 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2194                                 if (match && cur->key.mode > 0) {
2195                                         match = ((statbuf.st_mode & cur->key.mode) > 0);
2196                                         dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2197                                             match ? "matches" : "does not match", cur->key.mode);
2198                                 }
2199                                 if (match && cur->key.op == OP_NOMATCH)
2200                                         goto nomatch;
2201                                 if (!match && cur->key.op == OP_MATCH)
2202                                         goto nomatch;
2203                                 break;
2204                         }
2205                 case TK_M_PROGRAM:
2206                         {
2207                                 char program[UTIL_PATH_SIZE];
2208                                 char **envp;
2209                                 char result[UTIL_PATH_SIZE];
2210
2211                                 free(event->program_result);
2212                                 event->program_result = NULL;
2213                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2214                                 envp = udev_device_get_properties_envp(event->dev);
2215                                 info(event->udev, "PROGRAM '%s' %s:%u\n",
2216                                      program,
2217                                      &rules->buf[rule->rule.filename_off],
2218                                      rule->rule.filename_line);
2219                                 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL, NULL) != 0) {
2220                                         if (cur->key.op != OP_NOMATCH)
2221                                                 goto nomatch;
2222                                 } else {
2223                                         int count;
2224
2225                                         util_remove_trailing_chars(result, '\n');
2226                                         if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2227                                                 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2228                                                 if (count > 0)
2229                                                         info(event->udev, "%i character(s) replaced\n" , count);
2230                                         }
2231                                         event->program_result = strdup(result);
2232                                         dbg(event->udev, "storing result '%s'\n", event->program_result);
2233                                         if (cur->key.op == OP_NOMATCH)
2234                                                 goto nomatch;
2235                                 }
2236                                 break;
2237                         }
2238                 case TK_M_IMPORT_FILE:
2239                         {
2240                                 char import[UTIL_PATH_SIZE];
2241
2242                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2243                                 if (import_file_into_properties(event->dev, import) != 0)
2244                                         if (cur->key.op != OP_NOMATCH)
2245                                                 goto nomatch;
2246                                 break;
2247                         }
2248                 case TK_M_IMPORT_PROG:
2249                         {
2250                                 char import[UTIL_PATH_SIZE];
2251
2252                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2253                                 info(event->udev, "IMPORT '%s' %s:%u\n",
2254                                      import,
2255                                      &rules->buf[rule->rule.filename_off],
2256                                      rule->rule.filename_line);
2257                                 if (import_program_into_properties(event->dev, import) != 0)
2258                                         if (cur->key.op != OP_NOMATCH)
2259                                                 goto nomatch;
2260                                 break;
2261                         }
2262                 case TK_M_IMPORT_PARENT:
2263                         {
2264                                 char import[UTIL_PATH_SIZE];
2265
2266                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2267                                 if (import_parent_into_properties(event->dev, import) != 0)
2268                                         if (cur->key.op != OP_NOMATCH)
2269                                                 goto nomatch;
2270                                 break;
2271                         }
2272                 case TK_M_RESULT:
2273                         if (match_key(rules, cur, event->program_result) != 0)
2274                                 goto nomatch;
2275                         break;
2276
2277                 case TK_A_IGNORE_DEVICE:
2278                         event->ignore_device = 1;
2279                         return 0;
2280                         break;
2281                 case TK_A_STRING_ESCAPE_NONE:
2282                         esc = ESCAPE_NONE;
2283                         break;
2284                 case TK_A_STRING_ESCAPE_REPLACE:
2285                         esc = ESCAPE_REPLACE;
2286                         break;
2287                 case TK_A_NUM_FAKE_PART:
2288                         if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2289                                 break;
2290                         if (udev_device_get_sysnum(event->dev) != NULL)
2291                                 break;
2292                         udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2293                         break;
2294                 case TK_A_INOTIFY_WATCH:
2295                         event->inotify_watch = cur->key.watch;
2296                         break;
2297                 case TK_A_DEVLINK_PRIO:
2298                         udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2299                         break;
2300                 case TK_A_OWNER:
2301                         {
2302                                 char owner[UTIL_NAME_SIZE];
2303
2304                                 if (event->owner_final)
2305                                         break;
2306                                 if (cur->key.op == OP_ASSIGN_FINAL)
2307                                         event->owner_final = 1;
2308                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2309                                 event->uid = util_lookup_user(event->udev, owner);
2310                                 info(event->udev, "OWNER %u %s:%u\n",
2311                                      event->uid,
2312                                      &rules->buf[rule->rule.filename_off],
2313                                      rule->rule.filename_line);
2314                                 break;
2315                         }
2316                 case TK_A_GROUP:
2317                         {
2318                                 char group[UTIL_NAME_SIZE];
2319
2320                                 if (event->group_final)
2321                                         break;
2322                                 if (cur->key.op == OP_ASSIGN_FINAL)
2323                                         event->group_final = 1;
2324                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2325                                 event->gid = util_lookup_group(event->udev, group);
2326                                 info(event->udev, "GROUP %u %s:%u\n",
2327                                      event->gid,
2328                                      &rules->buf[rule->rule.filename_off],
2329                                      rule->rule.filename_line);
2330                                 break;
2331                         }
2332                 case TK_A_MODE:
2333                         {
2334                                 char mode[UTIL_NAME_SIZE];
2335                                 char *endptr;
2336
2337                                 if (event->mode_final)
2338                                         break;
2339                                 if (cur->key.op == OP_ASSIGN_FINAL)
2340                                         event->mode_final = 1;
2341                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode, sizeof(mode));
2342                                 event->mode = strtol(mode, &endptr, 8);
2343                                 if (endptr[0] != '\0') {
2344                                         err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2345                                         event->mode = 0660;
2346                                 }
2347                                 info(event->udev, "MODE %#o %s:%u\n",
2348                                      event->mode,
2349                                      &rules->buf[rule->rule.filename_off],
2350                                      rule->rule.filename_line);
2351                                 break;
2352                         }
2353                 case TK_A_OWNER_ID:
2354                         if (event->owner_final)
2355                                 break;
2356                         if (cur->key.op == OP_ASSIGN_FINAL)
2357                                 event->owner_final = 1;
2358                         event->uid = cur->key.uid;
2359                         info(event->udev, "OWNER %u %s:%u\n",
2360                              event->uid,
2361                              &rules->buf[rule->rule.filename_off],
2362                              rule->rule.filename_line);
2363                         break;
2364                 case TK_A_GROUP_ID:
2365                         if (event->group_final)
2366                                 break;
2367                         if (cur->key.op == OP_ASSIGN_FINAL)
2368                                 event->group_final = 1;
2369                         event->gid = cur->key.gid;
2370                         info(event->udev, "GROUP %u %s:%u\n",
2371                              event->gid,
2372                              &rules->buf[rule->rule.filename_off],
2373                              rule->rule.filename_line);
2374                         break;
2375                 case TK_A_MODE_ID:
2376                         if (event->mode_final)
2377                                 break;
2378                         if (cur->key.op == OP_ASSIGN_FINAL)
2379                                 event->mode_final = 1;
2380                         event->mode = cur->key.mode;
2381                         info(event->udev, "MODE %#o %s:%u\n",
2382                              event->mode,
2383                              &rules->buf[rule->rule.filename_off],
2384                              rule->rule.filename_line);
2385                         break;
2386                 case TK_A_ENV:
2387                         {
2388                                 const char *name = &rules->buf[cur->key.attr_off];
2389                                 char *value = &rules->buf[cur->key.value_off];
2390
2391                                 if (value[0] != '\0') {
2392                                         char temp_value[UTIL_NAME_SIZE];
2393                                         struct udev_list_entry *entry;
2394
2395                                         udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2396                                         entry = udev_device_add_property(event->dev, name, temp_value);
2397                                         /* store in db, skip private keys */
2398                                         if (name[0] != '.')
2399                                                 udev_list_entry_set_flag(entry, 1);
2400                                 } else {
2401                                         udev_device_add_property(event->dev, name, NULL);
2402                                 }
2403                                 break;
2404                         }
2405                 case TK_A_NAME:
2406                         {
2407                                 const char *name  = &rules->buf[cur->key.value_off];
2408                                 char name_str[UTIL_PATH_SIZE];
2409                                 int count;
2410
2411                                 if (event->name_final)
2412                                         break;
2413                                 if (cur->key.op == OP_ASSIGN_FINAL)
2414                                         event->name_final = 1;
2415                                 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2416                                 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2417                                         count = udev_util_replace_chars(name_str, "/");
2418                                         if (count > 0)
2419                                                 info(event->udev, "%i character(s) replaced\n", count);
2420                                 }
2421                                 free(event->name);
2422                                 event->name = strdup(name_str);
2423                                 info(event->udev, "NAME '%s' %s:%u\n",
2424                                      event->name,
2425                                      &rules->buf[rule->rule.filename_off],
2426                                      rule->rule.filename_line);
2427                                 break;
2428                         }
2429                 case TK_A_DEVLINK:
2430                         {
2431                                 char temp[UTIL_PATH_SIZE];
2432                                 char filename[UTIL_PATH_SIZE];
2433                                 char *pos, *next;
2434                                 int count = 0;
2435
2436                                 if (event->devlink_final)
2437                                         break;
2438                                 if (major(udev_device_get_devnum(event->dev)) == 0)
2439                                         break;
2440                                 if (cur->key.op == OP_ASSIGN_FINAL)
2441                                         event->devlink_final = 1;
2442                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2443                                         udev_device_cleanup_devlinks_list(event->dev);
2444
2445                                 /* allow  multiple symlinks separated by spaces */
2446                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2447                                 if (esc == ESCAPE_UNSET)
2448                                         count = udev_util_replace_chars(temp, "/ ");
2449                                 else if (esc == ESCAPE_REPLACE)
2450                                         count = udev_util_replace_chars(temp, "/");
2451                                 if (count > 0)
2452                                         info(event->udev, "%i character(s) replaced\n" , count);
2453                                 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2454                                 pos = temp;
2455                                 while (isspace(pos[0]))
2456                                         pos++;
2457                                 next = strchr(pos, ' ');
2458                                 while (next != NULL) {
2459                                         next[0] = '\0';
2460                                         info(event->udev, "LINK '%s' %s:%u\n", pos,
2461                                              &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2462                                         util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2463                                         udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2464                                         while (isspace(next[1]))
2465                                                 next++;
2466                                         pos = &next[1];
2467                                         next = strchr(pos, ' ');
2468                                 }
2469                                 if (pos[0] != '\0') {
2470                                         info(event->udev, "LINK '%s' %s:%u\n", pos,
2471                                              &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2472                                         util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2473                                         udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2474                                 }
2475                         }
2476                         break;
2477                 case TK_A_EVENT_TIMEOUT:
2478                         udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2479                         break;
2480                 case TK_A_IGNORE_REMOVE:
2481                         udev_device_set_ignore_remove(event->dev, 1);
2482                         break;
2483                 case TK_A_ATTR:
2484                         {
2485                                 const char *key_name = &rules->buf[cur->key.attr_off];
2486                                 char attr[UTIL_PATH_SIZE];
2487                                 char value[UTIL_NAME_SIZE];
2488                                 FILE *f;
2489
2490                                 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2491                                         util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2492                                 attr_subst_subdir(attr, sizeof(attr));
2493
2494                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2495                                 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2496                                      &rules->buf[rule->rule.filename_off],
2497                                      rule->rule.filename_line);
2498                                 f = fopen(attr, "w");
2499                                 if (f != NULL) {
2500                                         if (fprintf(f, "%s", value) <= 0)
2501                                                 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2502                                         fclose(f);
2503                                 } else {
2504                                         err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2505                                 }
2506                                 break;
2507                         }
2508                 case TK_A_RUN:
2509                         {
2510                                 struct udev_list_entry *list_entry;
2511
2512                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2513                                         udev_list_cleanup_entries(event->udev, &event->run_list);
2514                                 info(event->udev, "RUN '%s' %s:%u\n",
2515                                      &rules->buf[cur->key.value_off],
2516                                      &rules->buf[rule->rule.filename_off],
2517                                      rule->rule.filename_line);
2518                                 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2519                                                                  &rules->buf[cur->key.value_off], NULL, 1, 0);
2520                                 if (cur->key.fail_on_error)
2521                                         udev_list_entry_set_flag(list_entry, 1);
2522                                 break;
2523                         }
2524                 case TK_A_GOTO:
2525                         if (cur->key.rule_goto == 0)
2526                                 break;
2527                         cur = &rules->tokens[cur->key.rule_goto];
2528                         continue;
2529                 case TK_A_LAST_RULE:
2530                 case TK_END:
2531                         return 0;
2532
2533                 case TK_M_PARENTS_MIN:
2534                 case TK_M_PARENTS_MAX:
2535                 case TK_M_MAX:
2536                 case TK_UNSET:
2537                         err(rules->udev, "wrong type %u\n", cur->type);
2538                         goto nomatch;
2539                 }
2540
2541                 cur++;
2542                 continue;
2543         nomatch:
2544                 /* fast-forward to next rule */
2545                 cur = rule + rule->rule.token_count;
2546                 dbg(rules->udev, "forward to rule: %u\n",
2547                                  (unsigned int) (cur - rules->tokens));
2548         }
2549 }