udev/udev-rules.c

   1 /*
   2  * Copyright (C) 2008 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
  31 #include "udev.h"
  32
  33 #define PREALLOC_TOKEN                  2048
  34 #define PREALLOC_STRBUF                 32 * 1024
  35 #define PREALLOC_TRIE                   256
  36
  37 struct uid_gid {
  38         unsigned int name_off;
  39         union {
  40                 uid_t   uid;
  41                 gid_t   gid;
  42         };
  43 };
  44
  45 struct trie_node {
  46         /* this node's first child */
  47         unsigned int child_idx;
  48         /* the next child of our parent node's child list */
  49         unsigned int next_child_idx;
  50         /* this node's last child (shortcut for append) */
  51         unsigned int last_child_idx;
  52         unsigned int value_off;
  53         unsigned short value_len;
  54         unsigned char key;
  55 };
  56
  57 struct udev_rules {
  58         struct udev *udev;
  59         int resolve_names;
  60
  61         /* every key in the rules file becomes a token */
  62         struct token *tokens;
  63         unsigned int token_cur;
  64         unsigned int token_max;
  65
  66         /* all key strings are copied to a single string buffer */
  67         char *buf;
  68         size_t buf_cur;
  69         size_t buf_max;
  70         unsigned int buf_count;
  71
  72         /* during rule parsing, strings are indexed to find duplicates */
  73         struct trie_node *trie_nodes;
  74         unsigned int trie_nodes_cur;
  75         unsigned int trie_nodes_max;
  76
  77         /* during rule parsing, uid/gid lookup results are cached */
  78         struct uid_gid *uids;
  79         unsigned int uids_cur;
  80         unsigned int uids_max;
  81         struct uid_gid *gids;
  82         unsigned int gids_cur;
  83         unsigned int gids_max;
  84 };
  85
  86 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
  87 enum operation_type {
  88         OP_UNSET,
  89
  90         OP_MATCH,
  91         OP_NOMATCH,
  92         OP_MATCH_MAX,
  93
  94         OP_ADD,
  95         OP_ASSIGN,
  96         OP_ASSIGN_FINAL,
  97 };
  98
  99 enum string_glob_type {
 100         GL_UNSET,
 101         GL_PLAIN,                       /* no special chars */
 102         GL_GLOB,                        /* shell globs ?,*,[] */
 103         GL_SPLIT,                       /* multi-value A|B */
 104         GL_SPLIT_GLOB,                  /* multi-value with glob A*|B* */
 105         GL_SOMETHING,                   /* commonly used "?*" */
 106         GL_FORMAT,
 107 };
 108
 109 /* tokens of a rule are sorted/handled in this order */
 110 enum token_type {
 111         TK_UNSET,
 112         TK_RULE,
 113
 114         TK_M_ACTION,                    /* val */
 115         TK_M_DEVPATH,                   /* val */
 116         TK_M_KERNEL,                    /* val */
 117         TK_M_DEVLINK,                   /* val */
 118         TK_M_NAME,                      /* val */
 119         TK_M_ENV,                       /* val, attr */
 120         TK_M_SUBSYSTEM,                 /* val */
 121         TK_M_DRIVER,                    /* val */
 122         TK_M_WAITFOR,                   /* val */
 123         TK_M_ATTR,                      /* val, attr */
 124
 125         TK_M_PARENTS_MIN,
 126         TK_M_KERNELS,                   /* val */
 127         TK_M_SUBSYSTEMS,                /* val */
 128         TK_M_DRIVERS,                   /* val */
 129         TK_M_ATTRS,                     /* val, attr */
 130         TK_M_PARENTS_MAX,
 131
 132         TK_M_TEST,                      /* val, mode_t */
 133         TK_M_PROGRAM,                   /* val */
 134         TK_M_IMPORT_FILE,               /* val */
 135         TK_M_IMPORT_PROG,               /* val */
 136         TK_M_IMPORT_PARENT,             /* val */
 137         TK_M_RESULT,                    /* val */
 138         TK_M_MAX,
 139
 140         TK_A_IGNORE_DEVICE,
 141         TK_A_STRING_ESCAPE_NONE,
 142         TK_A_STRING_ESCAPE_REPLACE,
 143         TK_A_INOTIFY_WATCH,             /* int */
 144         TK_A_NUM_FAKE_PART,             /* int */
 145         TK_A_DEVLINK_PRIO,              /* int */
 146         TK_A_OWNER,                     /* val */
 147         TK_A_GROUP,                     /* val */
 148         TK_A_MODE,                      /* val */
 149         TK_A_OWNER_ID,                  /* uid_t */
 150         TK_A_GROUP_ID,                  /* gid_t */
 151         TK_A_MODE_ID,                   /* mode_t */
 152         TK_A_ENV,                       /* val, attr */
 153         TK_A_NAME,                      /* val */
 154         TK_A_DEVLINK,                   /* val */
 155         TK_A_EVENT_TIMEOUT,             /* int */
 156         TK_A_IGNORE_REMOVE,
 157         TK_A_ATTR,                      /* val, attr */
 158         TK_A_RUN,                       /* val, bool */
 159         TK_A_GOTO,                      /* size_t */
 160         TK_A_LAST_RULE,
 161
 162         TK_END,
 163 };
 164
 165 /* we try to pack stuff in a way that we take only 12 bytes per token */
 166 struct token {
 167         union {
 168                 unsigned char type;             /* same as in rule and key */
 169                 struct {
 170                         unsigned char type;
 171                         unsigned char flags;
 172                         unsigned short token_count;
 173                         unsigned int label_off;
 174                         unsigned short filename_off;
 175                         unsigned short filename_line;
 176                 } rule;
 177                 struct {
 178                         unsigned char type;
 179                         unsigned char flags;
 180                         unsigned char op;
 181                         unsigned char glob;
 182                         unsigned int value_off;
 183                         union {
 184                                 unsigned int attr_off;
 185                                 int ignore_error;
 186                                 unsigned int rule_goto;
 187                                 mode_t  mode;
 188                                 uid_t uid;
 189                                 gid_t gid;
 190                                 int num_fake_part;
 191                                 int devlink_prio;
 192                                 int event_timeout;
 193                                 int watch;
 194                         };
 195                 } key;
 196         };
 197 };
 198
 199 #define MAX_TK          64
 200 struct rule_tmp {
 201         struct udev_rules *rules;
 202         struct token rule;
 203         struct token token[MAX_TK];
 204         unsigned int token_cur;
 205 };
 206
 207 #ifdef DEBUG
 208 static const char *operation_str(enum operation_type type)
 209 {
 210         static const char *operation_strs[] = {
 211                 [OP_UNSET] =            "UNSET",
 212                 [OP_MATCH] =            "match",
 213                 [OP_NOMATCH] =          "nomatch",
 214                 [OP_MATCH_MAX] =        "MATCH_MAX",
 215
 216                 [OP_ADD] =              "add",
 217                 [OP_ASSIGN] =           "assign",
 218                 [OP_ASSIGN_FINAL] =     "assign-final",
 219 }       ;
 220
 221         return operation_strs[type];
 222 }
 223
 224 static const char *string_glob_str(enum string_glob_type type)
 225 {
 226         static const char *string_glob_strs[] = {
 227                 [GL_UNSET] =            "UNSET",
 228                 [GL_PLAIN] =            "plain",
 229                 [GL_GLOB] =             "glob",
 230                 [GL_SPLIT] =            "split",
 231                 [GL_SPLIT_GLOB] =       "split-glob",
 232                 [GL_SOMETHING] =        "split-glob",
 233                 [GL_FORMAT] =           "format",
 234         };
 235
 236         return string_glob_strs[type];
 237 }
 238
 239 static const char *token_str(enum token_type type)
 240 {
 241         static const char *token_strs[] = {
 242                 [TK_UNSET] =                    "UNSET",
 243                 [TK_RULE] =                     "RULE",
 244
 245                 [TK_M_ACTION] =                 "M ACTION",
 246                 [TK_M_DEVPATH] =                "M DEVPATH",
 247                 [TK_M_KERNEL] =                 "M KERNEL",
 248                 [TK_M_DEVLINK] =                "M DEVLINK",
 249                 [TK_M_NAME] =                   "M NAME",
 250                 [TK_M_ENV] =                    "M ENV",
 251                 [TK_M_SUBSYSTEM] =              "M SUBSYSTEM",
 252                 [TK_M_DRIVER] =                 "M DRIVER",
 253                 [TK_M_WAITFOR] =                "M WAITFOR",
 254                 [TK_M_ATTR] =                   "M ATTR",
 255
 256                 [TK_M_PARENTS_MIN] =            "M PARENTS_MIN",
 257                 [TK_M_KERNELS] =                "M KERNELS",
 258                 [TK_M_SUBSYSTEMS] =             "M SUBSYSTEMS",
 259                 [TK_M_DRIVERS] =                "M DRIVERS",
 260                 [TK_M_ATTRS] =                  "M ATTRS",
 261                 [TK_M_PARENTS_MAX] =            "M PARENTS_MAX",
 262
 263                 [TK_M_TEST] =                   "M TEST",
 264                 [TK_M_PROGRAM] =                "M PROGRAM",
 265                 [TK_M_IMPORT_FILE] =            "M IMPORT_FILE",
 266                 [TK_M_IMPORT_PROG] =            "M IMPORT_PROG",
 267                 [TK_M_IMPORT_PARENT] =          "M MPORT_PARENT",
 268                 [TK_M_RESULT] =                 "M RESULT",
 269                 [TK_M_MAX] =                    "M MAX",
 270
 271                 [TK_A_IGNORE_DEVICE] =          "A IGNORE_DEVICE",
 272                 [TK_A_STRING_ESCAPE_NONE] =     "A STRING_ESCAPE_NONE",
 273                 [TK_A_STRING_ESCAPE_REPLACE] =  "A STRING_ESCAPE_REPLACE",
 274                 [TK_A_INOTIFY_WATCH] =          "A INOTIFY_WATCH",
 275                 [TK_A_NUM_FAKE_PART] =          "A NUM_FAKE_PART",
 276                 [TK_A_DEVLINK_PRIO] =           "A DEVLINK_PRIO",
 277                 [TK_A_OWNER] =                  "A OWNER",
 278                 [TK_A_GROUP] =                  "A GROUP",
 279                 [TK_A_MODE] =                   "A MODE",
 280                 [TK_A_OWNER_ID] =               "A OWNER_ID",
 281                 [TK_A_GROUP_ID] =               "A GROUP_ID",
 282                 [TK_A_MODE_ID] =                "A MODE_ID",
 283                 [TK_A_ENV] =                    "A ENV",
 284                 [TK_A_NAME] =                   "A NAME",
 285                 [TK_A_DEVLINK] =                "A DEVLINK",
 286                 [TK_A_EVENT_TIMEOUT] =          "A EVENT_TIMEOUT",
 287                 [TK_A_IGNORE_REMOVE] =          "A IGNORE_REMOVE",
 288                 [TK_A_ATTR] =                   "A ATTR",
 289                 [TK_A_RUN] =                    "A RUN",
 290                 [TK_A_GOTO] =                   "A GOTO",
 291                 [TK_A_LAST_RULE] =              "A LAST_RULE",
 292
 293                 [TK_END] =                      "END",
 294         };
 295
 296         return token_strs[type];
 297 }
 298
 299 static void dump_token(struct udev_rules *rules, struct token *token)
 300 {
 301         enum token_type type = token->type;
 302         enum operation_type op = token->key.op;
 303         enum string_glob_type glob = token->key.glob;
 304         const char *value = &rules->buf[token->key.value_off];
 305         const char *attr = &rules->buf[token->key.attr_off];
 306
 307         switch (type) {
 308         case TK_RULE:
 309                 {
 310                         const char *tks_ptr = (char *)rules->tokens;
 311                         const char *tk_ptr = (char *)token;
 312                         unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
 313
 314                         dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
 315                             &rules->buf[token->rule.filename_off], token->rule.filename_line,
 316                             idx, token->rule.token_count,
 317                             &rules->buf[token->rule.label_off],
 318                             token->rule.flags);
 319                         break;
 320                 }
 321         case TK_M_ACTION:
 322         case TK_M_DEVPATH:
 323         case TK_M_KERNEL:
 324         case TK_M_SUBSYSTEM:
 325         case TK_M_DRIVER:
 326         case TK_M_WAITFOR:
 327         case TK_M_DEVLINK:
 328         case TK_M_NAME:
 329         case TK_M_KERNELS:
 330         case TK_M_SUBSYSTEMS:
 331         case TK_M_DRIVERS:
 332         case TK_M_PROGRAM:
 333         case TK_M_IMPORT_FILE:
 334         case TK_M_IMPORT_PROG:
 335         case TK_M_IMPORT_PARENT:
 336         case TK_M_RESULT:
 337         case TK_A_NAME:
 338         case TK_A_DEVLINK:
 339         case TK_A_OWNER:
 340         case TK_A_GROUP:
 341         case TK_A_MODE:
 342         case TK_A_RUN:
 343                 dbg(rules->udev, "%s %s '%s'(%s)\n",
 344                     token_str(type), operation_str(op), value, string_glob_str(glob));
 345                 break;
 346         case TK_M_ATTR:
 347         case TK_M_ATTRS:
 348         case TK_M_ENV:
 349         case TK_A_ATTR:
 350         case TK_A_ENV:
 351                 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
 352                     token_str(type), operation_str(op), attr, value, string_glob_str(glob));
 353                 break;
 354         case TK_A_IGNORE_DEVICE:
 355         case TK_A_STRING_ESCAPE_NONE:
 356         case TK_A_STRING_ESCAPE_REPLACE:
 357         case TK_A_LAST_RULE:
 358         case TK_A_IGNORE_REMOVE:
 359                 dbg(rules->udev, "%s\n", token_str(type));
 360                 break;
 361         case TK_M_TEST:
 362                 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
 363                     token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
 364                 break;
 365         case TK_A_INOTIFY_WATCH:
 366                 dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch);
 367                 break;
 368         case TK_A_NUM_FAKE_PART:
 369                 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
 370                 break;
 371         case TK_A_DEVLINK_PRIO:
 372                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
 373                 break;
 374         case TK_A_OWNER_ID:
 375                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
 376                 break;
 377         case TK_A_GROUP_ID:
 378                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
 379                 break;
 380         case TK_A_MODE_ID:
 381                 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
 382                 break;
 383         case TK_A_EVENT_TIMEOUT:
 384                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
 385                 break;
 386         case TK_A_GOTO:
 387                 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
 388                 break;
 389         case TK_END:
 390                 dbg(rules->udev, "* %s\n", token_str(type));
 391                 break;
 392         case TK_M_PARENTS_MIN:
 393         case TK_M_PARENTS_MAX:
 394         case TK_M_MAX:
 395         case TK_UNSET:
 396                 dbg(rules->udev, "unknown type %u\n", type);
 397                 break;
 398         }
 399 }
 400
 401 static void dump_rules(struct udev_rules *rules)
 402 {
 403         unsigned int i;
 404
 405         dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
 406             rules->token_cur,
 407             rules->token_cur * sizeof(struct token),
 408             rules->buf_count,
 409             rules->buf_cur);
 410         for(i = 0; i < rules->token_cur; i++)
 411                 dump_token(rules, &rules->tokens[i]);
 412 }
 413 #else
 414 static inline const char *operation_str(enum operation_type type) { return NULL; }
 415 static inline const char *token_str(enum token_type type) { return NULL; }
 416 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
 417 static inline void dump_rules(struct udev_rules *rules) {}
 418 #endif /* DEBUG */
 419
 420 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
 421 {
 422         int off;
 423
 424         /* grow buffer if needed */
 425         if (rules->buf_cur + bytes+1 >= rules->buf_max) {
 426                 char *buf;
 427                 unsigned int add;
 428
 429                 /* double the buffer size */
 430                 add = rules->buf_max;
 431                 if (add < bytes * 8)
 432                         add = bytes * 8;
 433
 434                 buf = realloc(rules->buf, rules->buf_max + add);
 435                 if (buf == NULL)
 436                         return -1;
 437                 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
 438                 rules->buf = buf;
 439                 rules->buf_max += add;
 440         }
 441         off = rules->buf_cur;
 442         memcpy(&rules->buf[rules->buf_cur], str, bytes);
 443         rules->buf_cur += bytes;
 444         rules->buf_count++;
 445         return off;
 446 }
 447
 448 static int add_string(struct udev_rules *rules, const char *str)
 449 {
 450         unsigned int node_idx;
 451         struct trie_node *new_node;
 452         unsigned int new_node_idx;
 453         unsigned char key;
 454         unsigned short len;
 455         unsigned int depth;
 456         unsigned int off;
 457         struct trie_node *parent;
 458
 459         /* walk trie, start from last character of str to find matching tails */
 460         len = strlen(str);
 461         key = str[len-1];
 462         node_idx = 0;
 463         for (depth = 0; depth <= len; depth++) {
 464                 struct trie_node *node;
 465                 unsigned int child_idx;
 466
 467                 node = &rules->trie_nodes[node_idx];
 468                 off = node->value_off + node->value_len - len;
 469
 470                 /* match against current node */
 471                 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
 472                         return off;
 473
 474                 /* lookup child node */
 475                 key = str[len - 1 - depth];
 476                 child_idx = node->child_idx;
 477                 while (child_idx > 0) {
 478                         struct trie_node *child;
 479
 480                         child = &rules->trie_nodes[child_idx];
 481                         if (child->key == key)
 482                                 break;
 483                         child_idx = child->next_child_idx;
 484                 }
 485                 if (child_idx == 0)
 486                         break;
 487                 node_idx = child_idx;
 488         }
 489
 490         /* string not found, add it */
 491         off = add_new_string(rules, str, len + 1);
 492
 493         /* grow trie nodes if needed */
 494         if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
 495                 struct trie_node *nodes;
 496                 unsigned int add;
 497
 498                 /* double the buffer size */
 499                 add = rules->trie_nodes_max;
 500                 if (add < 8)
 501                         add = 8;
 502
 503                 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
 504                 if (nodes == NULL)
 505                         return -1;
 506                 dbg(rules->udev, "extend trie nodes from %u to %u\n",
 507                     rules->trie_nodes_max, rules->trie_nodes_max + add);
 508                 rules->trie_nodes = nodes;
 509                 rules->trie_nodes_max += add;
 510         }
 511
 512         /* get a new node */
 513         new_node_idx = rules->trie_nodes_cur;
 514         rules->trie_nodes_cur++;
 515         new_node = &rules->trie_nodes[new_node_idx];
 516         memset(new_node, 0x00, sizeof(struct trie_node));
 517         new_node->value_off = off;
 518         new_node->value_len = len;
 519         new_node->key = key;
 520
 521         /* join the parent's child list */
 522         parent = &rules->trie_nodes[node_idx];
 523         if (parent->child_idx == 0) {
 524                 parent->child_idx = new_node_idx;
 525         } else {
 526                 struct trie_node *last_child;
 527
 528                 last_child = &rules->trie_nodes[parent->last_child_idx];
 529                 last_child->next_child_idx = new_node_idx;
 530         }
 531         parent->last_child_idx = new_node_idx;
 532         return off;
 533 }
 534
 535 static int add_token(struct udev_rules *rules, struct token *token)
 536 {
 537         /* grow buffer if needed */
 538         if (rules->token_cur+1 >= rules->token_max) {
 539                 struct token *tokens;
 540                 unsigned int add;
 541
 542                 /* double the buffer size */
 543                 add = rules->token_max;
 544                 if (add < 8)
 545                         add = 8;
 546
 547                 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
 548                 if (tokens == NULL)
 549                         return -1;
 550                 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
 551                 rules->tokens = tokens;
 552                 rules->token_max += add;
 553         }
 554         memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
 555         rules->token_cur++;
 556         return 0;
 557 }
 558
 559 static uid_t add_uid(struct udev_rules *rules, const char *owner)
 560 {
 561         unsigned int i;
 562         uid_t uid;
 563         unsigned int off;
 564
 565         /* lookup, if we know it already */
 566         for (i = 0; i < rules->uids_cur; i++) {
 567                 off = rules->uids[i].name_off;
 568                 if (strcmp(&rules->buf[off], owner) == 0) {
 569                         uid = rules->uids[i].uid;
 570                         dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
 571                         return uid;
 572                 }
 573         }
 574         uid = util_lookup_user(rules->udev, owner);
 575
 576         /* grow buffer if needed */
 577         if (rules->uids_cur+1 >= rules->uids_max) {
 578                 struct uid_gid *uids;
 579                 unsigned int add;
 580
 581                 /* double the buffer size */
 582                 add = rules->uids_max;
 583                 if (add < 1)
 584                         add = 8;
 585
 586                 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
 587                 if (uids == NULL)
 588                         return uid;
 589                 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
 590                 rules->uids = uids;
 591                 rules->uids_max += add;
 592         }
 593         rules->uids[rules->uids_cur].uid = uid;
 594         off = add_string(rules, owner);
 595         if (off <= 0)
 596                 return uid;
 597         rules->uids[rules->uids_cur].name_off = off;
 598         rules->uids_cur++;
 599         return uid;
 600 }
 601
 602 static gid_t add_gid(struct udev_rules *rules, const char *group)
 603 {
 604         unsigned int i;
 605         gid_t gid;
 606         unsigned int off;
 607
 608         /* lookup, if we know it already */
 609         for (i = 0; i < rules->gids_cur; i++) {
 610                 off = rules->gids[i].name_off;
 611                 if (strcmp(&rules->buf[off], group) == 0) {
 612                         gid = rules->gids[i].gid;
 613                         dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
 614                         return gid;
 615                 }
 616         }
 617         gid = util_lookup_group(rules->udev, group);
 618
 619         /* grow buffer if needed */
 620         if (rules->gids_cur+1 >= rules->gids_max) {
 621                 struct uid_gid *gids;
 622                 unsigned int add;
 623
 624                 /* double the buffer size */
 625                 add = rules->gids_max;
 626                 if (add < 1)
 627                         add = 8;
 628
 629                 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
 630                 if (gids == NULL)
 631                         return gid;
 632                 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
 633                 rules->gids = gids;
 634                 rules->gids_max += add;
 635         }
 636         rules->gids[rules->gids_cur].gid = gid;
 637         off = add_string(rules, group);
 638         if (off <= 0)
 639                 return gid;
 640         rules->gids[rules->gids_cur].name_off = off;
 641         rules->gids_cur++;
 642         return gid;
 643 }
 644
 645 static int import_property_from_string(struct udev_device *dev, char *line)
 646 {
 647         struct udev *udev = udev_device_get_udev(dev);
 648         char *key;
 649         char *val;
 650         size_t len;
 651
 652         /* find key */
 653         key = line;
 654         while (isspace(key[0]))
 655                 key++;
 656
 657         /* comment or empty line */
 658         if (key[0] == '#' || key[0] == '\0')
 659                 return -1;
 660
 661         /* split key/value */
 662         val = strchr(key, '=');
 663         if (val == NULL)
 664                 return -1;
 665         val[0] = '\0';
 666         val++;
 667
 668         /* find value */
 669         while (isspace(val[0]))
 670                 val++;
 671
 672         /* terminate key */
 673         len = strlen(key);
 674         if (len == 0)
 675                 return -1;
 676         while (isspace(key[len-1]))
 677                 len--;
 678         key[len] = '\0';
 679
 680         /* terminate value */
 681         len = strlen(val);
 682         if (len == 0)
 683                 return -1;
 684         while (isspace(val[len-1]))
 685                 len--;
 686         val[len] = '\0';
 687
 688         if (len == 0)
 689                 return -1;
 690
 691         /* unquote */
 692         if (val[0] == '"' || val[0] == '\'') {
 693                 if (val[len-1] != val[0]) {
 694                         info(udev, "inconsistent quoting: '%s', skip\n", line);
 695                         return -1;
 696                 }
 697                 val[len-1] = '\0';
 698                 val++;
 699         }
 700
 701         dbg(udev, "adding '%s'='%s'\n", key, val);
 702
 703         /* handle device, renamed by external tool, returning new path */
 704         if (strcmp(key, "DEVPATH") == 0) {
 705                 char syspath[UTIL_PATH_SIZE];
 706
 707                 info(udev, "updating devpath from '%s' to '%s'\n",
 708                      udev_device_get_devpath(dev), val);
 709                 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL);
 710                 udev_device_set_syspath(dev, syspath);
 711         } else {
 712                 struct udev_list_entry *entry;
 713
 714                 entry = udev_device_add_property(dev, key, val);
 715                 /* store in db */
 716                 udev_list_entry_set_flag(entry, 1);
 717         }
 718         return 0;
 719 }
 720
 721 static int import_file_into_properties(struct udev_device *dev, const char *filename)
 722 {
 723         FILE *f;
 724         char line[UTIL_LINE_SIZE];
 725
 726         f = fopen(filename, "r");
 727         if (f == NULL)
 728                 return -1;
 729         while (fgets(line, sizeof(line), f) != NULL)
 730                 import_property_from_string(dev, line);
 731         fclose(f);
 732         return 0;
 733 }
 734
 735 static int import_program_into_properties(struct udev_device *dev, const char *program)
 736 {
 737         struct udev *udev = udev_device_get_udev(dev);
 738         char **envp;
 739         char result[4096];
 740         size_t reslen;
 741         char *line;
 742
 743         envp = udev_device_get_properties_envp(dev);
 744         if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
 745                 return -1;
 746
 747         line = result;
 748         while (line != NULL) {
 749                 char *pos;
 750
 751                 pos = strchr(line, '\n');
 752                 if (pos != NULL) {
 753                         pos[0] = '\0';
 754                         pos = &pos[1];
 755                 }
 756                 import_property_from_string(dev, line);
 757                 line = pos;
 758         }
 759         return 0;
 760 }
 761
 762 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
 763 {
 764         struct udev *udev = udev_device_get_udev(dev);
 765         struct udev_device *dev_parent;
 766         struct udev_list_entry *list_entry;
 767
 768         dev_parent = udev_device_get_parent(dev);
 769         if (dev_parent == NULL)
 770                 return -1;
 771
 772         dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
 773         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
 774                 const char *key = udev_list_entry_get_name(list_entry);
 775                 const char *val = udev_list_entry_get_value(list_entry);
 776
 777                 if (fnmatch(filter, key, 0) == 0) {
 778                         struct udev_list_entry *entry;
 779
 780                         dbg(udev, "import key '%s=%s'\n", key, val);
 781                         entry = udev_device_add_property(dev, key, val);
 782                         /* store in db */
 783                         udev_list_entry_set_flag(entry, 1);
 784                 }
 785         }
 786         return 0;
 787 }
 788
 789 #define WAIT_LOOP_PER_SECOND            50
 790 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
 791 {
 792         struct udev *udev = udev_device_get_udev(dev);
 793         char filepath[UTIL_PATH_SIZE];
 794         char devicepath[UTIL_PATH_SIZE];
 795         struct stat stats;
 796         int loop = timeout * WAIT_LOOP_PER_SECOND;
 797
 798         /* a relative path is a device attribute */
 799         devicepath[0] = '\0';
 800         if (file[0] != '/') {
 801                 util_strscpyl(devicepath, sizeof(devicepath),
 802                               udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL);
 803                 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
 804                 file = filepath;
 805         }
 806
 807         dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
 808         while (--loop) {
 809                 /* lookup file */
 810                 if (stat(file, &stats) == 0) {
 811                         info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
 812                         return 0;
 813                 }
 814                 /* make sure, the device did not disappear in the meantime */
 815                 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
 816                         info(udev, "device disappeared while waiting for '%s'\n", file);
 817                         return -2;
 818                 }
 819                 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
 820                 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
 821         }
 822         info(udev, "waiting for '%s' failed\n", file);
 823         return -1;
 824 }
 825
 826 static int attr_subst_subdir(char *attr, size_t len)
 827 {
 828         int found = 0;
 829
 830         if (strstr(attr, "/*/")) {
 831                 char *pos;
 832                 char dirname[UTIL_PATH_SIZE];
 833                 const char *tail;
 834                 DIR *dir;
 835
 836                 util_strscpy(dirname, sizeof(dirname), attr);
 837                 pos = strstr(dirname, "/*/");
 838                 if (pos == NULL)
 839                         return -1;
 840                 pos[0] = '\0';
 841                 tail = &pos[2];
 842                 dir = opendir(dirname);
 843                 if (dir != NULL) {
 844                         struct dirent *dent;
 845
 846                         for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 847                                 struct stat stats;
 848
 849                                 if (dent->d_name[0] == '.')
 850                                         continue;
 851                                 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
 852                                 if (stat(attr, &stats) == 0) {
 853                                         found = 1;
 854                                         break;
 855                                 }
 856                         }
 857                         closedir(dir);
 858                 }
 859         }
 860
 861         return found;
 862 }
 863
 864 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
 865 {
 866         char *linepos;
 867         char *temp;
 868
 869         linepos = *line;
 870         if (linepos == NULL && linepos[0] == '\0')
 871                 return -1;
 872
 873         /* skip whitespace */
 874         while (isspace(linepos[0]) || linepos[0] == ',')
 875                 linepos++;
 876
 877         /* get the key */
 878         if (linepos[0] == '\0')
 879                 return -1;
 880         *key = linepos;
 881
 882         while (1) {
 883                 linepos++;
 884                 if (linepos[0] == '\0')
 885                         return -1;
 886                 if (isspace(linepos[0]))
 887                         break;
 888                 if (linepos[0] == '=')
 889                         break;
 890                 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
 891                         if (linepos[1] == '=')
 892                                 break;
 893         }
 894
 895         /* remember end of key */
 896         temp = linepos;
 897
 898         /* skip whitespace after key */
 899         while (isspace(linepos[0]))
 900                 linepos++;
 901         if (linepos[0] == '\0')
 902                 return -1;
 903
 904         /* get operation type */
 905         if (linepos[0] == '=' && linepos[1] == '=') {
 906                 *op = OP_MATCH;
 907                 linepos += 2;
 908         } else if (linepos[0] == '!' && linepos[1] == '=') {
 909                 *op = OP_NOMATCH;
 910                 linepos += 2;
 911         } else if (linepos[0] == '+' && linepos[1] == '=') {
 912                 *op = OP_ADD;
 913                 linepos += 2;
 914         } else if (linepos[0] == '=') {
 915                 *op = OP_ASSIGN;
 916                 linepos++;
 917         } else if (linepos[0] == ':' && linepos[1] == '=') {
 918                 *op = OP_ASSIGN_FINAL;
 919                 linepos += 2;
 920         } else
 921                 return -1;
 922
 923         /* terminate key */
 924         temp[0] = '\0';
 925
 926         /* skip whitespace after operator */
 927         while (isspace(linepos[0]))
 928                 linepos++;
 929         if (linepos[0] == '\0')
 930                 return -1;
 931
 932         /* get the value */
 933         if (linepos[0] == '"')
 934                 linepos++;
 935         else
 936                 return -1;
 937         *value = linepos;
 938
 939         /* terminate */
 940         temp = strchr(linepos, '"');
 941         if (!temp)
 942                 return -1;
 943         temp[0] = '\0';
 944         temp++;
 945         dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
 946
 947         /* move line to next key */
 948         *line = temp;
 949         return 0;
 950 }
 951
 952 /* extract possible KEY{attr} */
 953 static char *get_key_attribute(struct udev *udev, char *str)
 954 {
 955         char *pos;
 956         char *attr;
 957
 958         attr = strchr(str, '{');
 959         if (attr != NULL) {
 960                 attr++;
 961                 pos = strchr(attr, '}');
 962                 if (pos == NULL) {
 963                         err(udev, "missing closing brace for format\n");
 964                         return NULL;
 965                 }
 966                 pos[0] = '\0';
 967                 dbg(udev, "attribute='%s'\n", attr);
 968                 return attr;
 969         }
 970         return NULL;
 971 }
 972
 973 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
 974                         enum operation_type op,
 975                         const char *value, const void *data)
 976 {
 977         struct token *token = &rule_tmp->token[rule_tmp->token_cur];
 978         const char *attr = data;
 979         enum string_glob_type glob;
 980
 981         memset(token, 0x00, sizeof(struct token));
 982
 983         switch (type) {
 984         case TK_M_ACTION:
 985         case TK_M_DEVPATH:
 986         case TK_M_KERNEL:
 987         case TK_M_SUBSYSTEM:
 988         case TK_M_DRIVER:
 989         case TK_M_WAITFOR:
 990         case TK_M_DEVLINK:
 991         case TK_M_NAME:
 992         case TK_M_KERNELS:
 993         case TK_M_SUBSYSTEMS:
 994         case TK_M_DRIVERS:
 995         case TK_M_PROGRAM:
 996         case TK_M_IMPORT_FILE:
 997         case TK_M_IMPORT_PROG:
 998         case TK_M_IMPORT_PARENT:
 999         case TK_M_RESULT:
1000         case TK_A_OWNER:
1001         case TK_A_GROUP:
1002         case TK_A_MODE:
1003         case TK_A_NAME:
1004         case TK_A_DEVLINK:
1005         case TK_A_GOTO:
1006                 token->key.value_off = add_string(rule_tmp->rules, value);
1007                 break;
1008         case TK_M_ENV:
1009         case TK_M_ATTR:
1010         case TK_M_ATTRS:
1011         case TK_A_ATTR:
1012         case TK_A_ENV:
1013                 token->key.value_off = add_string(rule_tmp->rules, value);
1014                 token->key.attr_off = add_string(rule_tmp->rules, attr);
1015                 break;
1016         case TK_M_TEST:
1017                 token->key.value_off = add_string(rule_tmp->rules, value);
1018                 if (data != NULL)
1019                         token->key.mode = *(mode_t *)data;
1020                 break;
1021         case TK_A_IGNORE_DEVICE:
1022         case TK_A_STRING_ESCAPE_NONE:
1023         case TK_A_STRING_ESCAPE_REPLACE:
1024         case TK_A_IGNORE_REMOVE:
1025         case TK_A_LAST_RULE:
1026                 break;
1027         case TK_A_RUN:
1028                 token->key.value_off = add_string(rule_tmp->rules, value);
1029                 token->key.ignore_error = *(int *)data;
1030                 break;
1031         case TK_A_INOTIFY_WATCH:
1032         case TK_A_NUM_FAKE_PART:
1033         case TK_A_DEVLINK_PRIO:
1034                 token->key.devlink_prio = *(int *)data;
1035                 break;
1036         case TK_A_OWNER_ID:
1037                 token->key.uid = *(uid_t *)data;
1038                 break;
1039         case TK_A_GROUP_ID:
1040                 token->key.gid = *(gid_t *)data;
1041                 break;
1042         case TK_A_MODE_ID:
1043                 token->key.mode = *(mode_t *)data;
1044                 break;
1045         case TK_A_EVENT_TIMEOUT:
1046                 token->key.event_timeout = *(int *)data;
1047                 break;
1048         case TK_RULE:
1049         case TK_M_PARENTS_MIN:
1050         case TK_M_PARENTS_MAX:
1051         case TK_M_MAX:
1052         case TK_END:
1053         case TK_UNSET:
1054                 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1055                 return -1;
1056         }
1057
1058         glob = GL_PLAIN;
1059         if (value != NULL) {
1060                 if (type < TK_M_MAX) {
1061                         /* check if we need to split or call fnmatch() while matching rules */
1062                         int has_split;
1063                         int has_glob;
1064
1065                         has_split = (strchr(value, '|') != NULL);
1066                         has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||
1067                                     strchr(value, '[') != NULL || strchr(value, ']') != NULL);
1068                         if (has_split && has_glob) {
1069                                 glob = GL_SPLIT_GLOB;
1070                         } else if (has_split) {
1071                                 glob = GL_SPLIT;
1072                         } else if (has_glob) {
1073                                 if (strcmp(value, "?*") == 0)
1074                                         glob = GL_SOMETHING;
1075                                 else
1076                                         glob = GL_GLOB;
1077                         }
1078                 } else {
1079                         /* check if we need to substitute format strings for matching rules */
1080                         if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1081                                 glob = GL_FORMAT;
1082                 }
1083         }
1084
1085         token->key.type = type;
1086         token->key.op = op;
1087         token->key.glob = glob;
1088         rule_tmp->token_cur++;
1089         if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1090                 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1091                 return -1;
1092         }
1093         return 0;
1094 }
1095
1096 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1097 {
1098         unsigned int i;
1099         unsigned int start = 0;
1100         unsigned int end = rule_tmp->token_cur;
1101
1102         for (i = 0; i < rule_tmp->token_cur; i++) {
1103                 enum token_type next_val = TK_UNSET;
1104                 unsigned int next_idx;
1105                 unsigned int j;
1106
1107                 /* find smallest value */
1108                 for (j = start; j < end; j++) {
1109                         if (rule_tmp->token[j].type == TK_UNSET)
1110                                 continue;
1111                         if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1112                                 next_val = rule_tmp->token[j].type;
1113                                 next_idx = j;
1114                         }
1115                 }
1116
1117                 /* add token and mark done */
1118                 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1119                         return -1;
1120                 rule_tmp->token[next_idx].type = TK_UNSET;
1121
1122                 /* shrink range */
1123                 if (next_idx == start)
1124                         start++;
1125                 if (next_idx+1 == end)
1126                         end--;
1127         }
1128         return 0;
1129 }
1130
1131 static int add_rule(struct udev_rules *rules, char *line,
1132                     const char *filename, unsigned int filename_off, unsigned int lineno)
1133 {
1134         char *linepos;
1135         char *attr;
1136         struct rule_tmp rule_tmp;
1137
1138         memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1139         rule_tmp.rules = rules;
1140         rule_tmp.rule.type = TK_RULE;
1141         rule_tmp.rule.rule.filename_off = filename_off;
1142         rule_tmp.rule.rule.filename_line = lineno;
1143
1144         linepos = line;
1145         while (1) {
1146                 char *key;
1147                 char *value;
1148                 enum operation_type op;
1149
1150                 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1151                         break;
1152
1153                 if (strcasecmp(key, "ACTION") == 0) {
1154                         if (op > OP_MATCH_MAX) {
1155                                 err(rules->udev, "invalid ACTION operation\n");
1156                                 goto invalid;
1157                         }
1158                         rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1159                         continue;
1160                 }
1161
1162                 if (strcasecmp(key, "DEVPATH") == 0) {
1163                         if (op > OP_MATCH_MAX) {
1164                                 err(rules->udev, "invalid DEVPATH operation\n");
1165                                 goto invalid;
1166                         }
1167                         rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1168                         continue;
1169                 }
1170
1171                 if (strcasecmp(key, "KERNEL") == 0) {
1172                         if (op > OP_MATCH_MAX) {
1173                                 err(rules->udev, "invalid KERNEL operation\n");
1174                                 goto invalid;
1175                         }
1176                         rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1177                         continue;
1178                 }
1179
1180                 if (strcasecmp(key, "SUBSYSTEM") == 0) {
1181                         if (op > OP_MATCH_MAX) {
1182                                 err(rules->udev, "invalid SUBSYSTEM operation\n");
1183                                 goto invalid;
1184                         }
1185                         /* bus, class, subsystem events should all be the same */
1186                         if (strcmp(value, "subsystem") == 0 ||
1187                             strcmp(value, "bus") == 0 ||
1188                             strcmp(value, "class") == 0) {
1189                                 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1190                                         err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1191                                             "please fix it in %s:%u", value, filename, lineno);
1192                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1193                         } else
1194                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1195                         continue;
1196                 }
1197
1198                 if (strcasecmp(key, "DRIVER") == 0) {
1199                         if (op > OP_MATCH_MAX) {
1200                                 err(rules->udev, "invalid DRIVER operation\n");
1201                                 goto invalid;
1202                         }
1203                         rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1204                         continue;
1205                 }
1206
1207                 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1208                         attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1209                         if (attr == NULL) {
1210                                 err(rules->udev, "error parsing ATTR attribute\n");
1211                                 goto invalid;
1212                         }
1213                         if (op < OP_MATCH_MAX) {
1214                                 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1215                         } else {
1216                                 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1217                         }
1218                         continue;
1219                 }
1220
1221                 if (strcasecmp(key, "KERNELS") == 0 ||
1222                     strcasecmp(key, "ID") == 0) {
1223                         if (op > OP_MATCH_MAX) {
1224                                 err(rules->udev, "invalid KERNELS operation\n");
1225                                 goto invalid;
1226                         }
1227                         rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1228                         continue;
1229                 }
1230
1231                 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
1232                     strcasecmp(key, "BUS") == 0) {
1233                         if (op > OP_MATCH_MAX) {
1234                                 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1235                                 goto invalid;
1236                         }
1237                         rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1238                         continue;
1239                 }
1240
1241                 if (strcasecmp(key, "DRIVERS") == 0) {
1242                         if (op > OP_MATCH_MAX) {
1243                                 err(rules->udev, "invalid DRIVERS operation\n");
1244                                 goto invalid;
1245                         }
1246                         rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1247                         continue;
1248                 }
1249
1250                 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1251                     strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1252                         if (op > OP_MATCH_MAX) {
1253                                 err(rules->udev, "invalid ATTRS operation\n");
1254                                 goto invalid;
1255                         }
1256                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1257                         if (attr == NULL) {
1258                                 err(rules->udev, "error parsing ATTRS attribute\n");
1259                                 goto invalid;
1260                         }
1261                         if (strncmp(attr, "device/", 7) == 0)
1262                                 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1263                                     "please fix it in %s:%u", filename, lineno);
1264                         else if (strstr(attr, "../") != NULL)
1265                                 err(rules->udev, "do not reference parent sysfs directories directly, "
1266                                     "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1267                         rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1268                         continue;
1269                 }
1270
1271                 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1272                         attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1273                         if (attr == NULL) {
1274                                 err(rules->udev, "error parsing ENV attribute\n");
1275                                 goto invalid;
1276                         }
1277                         if (op < OP_MATCH_MAX) {
1278                                 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1279                                         goto invalid;
1280                         } else {
1281                                 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1282                                         goto invalid;
1283                         }
1284                         continue;
1285                 }
1286
1287                 if (strcasecmp(key, "PROGRAM") == 0) {
1288                         rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1289                         continue;
1290                 }
1291
1292                 if (strcasecmp(key, "RESULT") == 0) {
1293                         if (op > OP_MATCH_MAX) {
1294                                 err(rules->udev, "invalid RESULT operation\n");
1295                                 goto invalid;
1296                         }
1297                         rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1298                         continue;
1299                 }
1300
1301                 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1302                         attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1303                         if (attr != NULL && strstr(attr, "program")) {
1304                                 dbg(rules->udev, "IMPORT will be executed\n");
1305                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1306                         } else if (attr != NULL && strstr(attr, "file")) {
1307                                 dbg(rules->udev, "IMPORT will be included as file\n");
1308                                 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1309                         } else if (attr != NULL && strstr(attr, "parent")) {
1310                                 dbg(rules->udev, "IMPORT will include the parent values\n");
1311                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1312                         } else {
1313                                 /* figure it out if it is executable */
1314                                 char file[UTIL_PATH_SIZE];
1315                                 char *pos;
1316                                 struct stat statbuf;
1317
1318                                 /* allow programs in /lib/udev called without the path */
1319                                 if (value[0] != '/')
1320                                         util_strscpyl(file, sizeof(file), UDEV_PREFIX "/lib/udev/", value, NULL);
1321                                 else
1322                                         util_strscpy(file, sizeof(file), value);
1323                                 pos = strchr(file, ' ');
1324                                 if (pos)
1325                                         pos[0] = '\0';
1326                                 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1327                                 if (stat(file, &statbuf) == 0 && (statbuf.st_mode & S_IXUSR)) {
1328                                         dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1329                                         rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1330                                 } else {
1331                                         dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1332                                         rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1333                                 }
1334                         }
1335                         continue;
1336                 }
1337
1338                 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1339                         mode_t mode = 0;
1340
1341                         if (op > OP_MATCH_MAX) {
1342                                 err(rules->udev, "invalid TEST operation\n");
1343                                 goto invalid;
1344                         }
1345                         attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1346                         if (attr != NULL) {
1347                                 mode = strtol(attr, NULL, 8);
1348                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1349                         } else {
1350                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1351                         }
1352                         continue;
1353                 }
1354
1355                 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1356                         int flag = 0;
1357
1358                         attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1359                         if (attr != NULL && strstr(attr, "ignore_error"))
1360                                 flag = 1;
1361                         rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1362                         continue;
1363                 }
1364
1365                 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1366                         rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1367                         continue;
1368                 }
1369
1370                 if (strcasecmp(key, "LABEL") == 0) {
1371                         rule_tmp.rule.rule.label_off = add_string(rules, value);
1372                         continue;
1373                 }
1374
1375                 if (strcasecmp(key, "GOTO") == 0) {
1376                         rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1377                         continue;
1378                 }
1379
1380                 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1381                         if (op < OP_MATCH_MAX) {
1382                                 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1383                         } else {
1384                                 if (value[0] == '\0')
1385                                         info(rules->udev, "name empty, node creation suppressed\n");
1386                                 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1387                                 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1388                                 if (attr != NULL) {
1389                                         if (strstr(attr, "all_partitions") != NULL) {
1390                                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1391
1392                                                 dbg(rules->udev, "creation of partition nodes requested\n");
1393                                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1394                                         }
1395                                         if (strstr(attr, "ignore_remove") != NULL) {
1396                                                 dbg(rules->udev, "remove event should be ignored\n");
1397                                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1398                                         }
1399                                 }
1400                         }
1401                         rule_tmp.rule.rule.flags = 1;
1402                         continue;
1403                 }
1404
1405                 if (strcasecmp(key, "SYMLINK") == 0) {
1406                         if (op < OP_MATCH_MAX)
1407                                 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1408                         else
1409                                 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1410                         rule_tmp.rule.rule.flags = 1;
1411                         continue;
1412                 }
1413
1414                 if (strcasecmp(key, "OWNER") == 0) {
1415                         uid_t uid;
1416                         char *endptr;
1417
1418                         uid = strtoul(value, &endptr, 10);
1419                         if (endptr[0] == '\0') {
1420                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1421                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1422                                 uid = add_uid(rules, value);
1423                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1424                         } else if (rules->resolve_names >= 0) {
1425                                 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1426                         }
1427                         rule_tmp.rule.rule.flags = 1;
1428                         continue;
1429                 }
1430
1431                 if (strcasecmp(key, "GROUP") == 0) {
1432                         gid_t gid;
1433                         char *endptr;
1434
1435                         gid = strtoul(value, &endptr, 10);
1436                         if (endptr[0] == '\0') {
1437                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1438                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1439                                 gid = add_gid(rules, value);
1440                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1441                         } else if (rules->resolve_names >= 0) {
1442                                 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1443                         }
1444                         rule_tmp.rule.rule.flags = 1;
1445                         continue;
1446                 }
1447
1448                 if (strcasecmp(key, "MODE") == 0) {
1449                         mode_t mode;
1450                         char *endptr;
1451
1452                         mode = strtol(value, &endptr, 8);
1453                         if (endptr[0] == '\0')
1454                                 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1455                         else
1456                                 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1457                         rule_tmp.rule.rule.flags = 1;
1458                         continue;
1459                 }
1460
1461                 if (strcasecmp(key, "OPTIONS") == 0) {
1462                         const char *pos;
1463
1464                         if (strstr(value, "last_rule") != NULL) {
1465                                 dbg(rules->udev, "last rule to be applied\n");
1466                                 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1467                         }
1468                         if (strstr(value, "ignore_device") != NULL) {
1469                                 dbg(rules->udev, "device should be ignored\n");
1470                                 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1471                         }
1472                         if (strstr(value, "ignore_remove") != NULL) {
1473                                 dbg(rules->udev, "remove event should be ignored\n");
1474                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1475                         }
1476                         pos = strstr(value, "link_priority=");
1477                         if (pos != NULL) {
1478                                 int prio = atoi(&pos[strlen("link_priority=")]);
1479
1480                                 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1481                                 dbg(rules->udev, "link priority=%i\n", prio);
1482                         }
1483                         pos = strstr(value, "event_timeout=");
1484                         if (pos != NULL) {
1485                                 int tout = atoi(&pos[strlen("event_timeout=")]);
1486
1487                                 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1488                                 dbg(rules->udev, "event timout=%i\n", tout);
1489                         }
1490                         pos = strstr(value, "string_escape=");
1491                         if (pos != NULL) {
1492                                 pos = &pos[strlen("string_escape=")];
1493                                 if (strncmp(pos, "none", strlen("none")) == 0)
1494                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1495                                 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1496                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1497                         }
1498                         if (strstr(value, "all_partitions") != NULL) {
1499                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1500
1501                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1502                                 dbg(rules->udev, "creation of partition nodes requested\n");
1503                         }
1504                         pos = strstr(value, "nowatch");
1505                         if (pos != NULL) {
1506                                 const int off = 0;
1507
1508                                 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &off);
1509                                 dbg(rules->udev, "inotify watch of device disabled\n");
1510                         } else {
1511                                 pos = strstr(value, "watch");
1512                                 if (pos != NULL) {
1513                                         const int on = 1;
1514
1515                                         rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &on);
1516                                         dbg(rules->udev, "inotify watch of device requested\n");
1517                                 }
1518                         }
1519                         continue;
1520                 }
1521                 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1522         }
1523
1524         /* add rule token */
1525         rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1526         if (add_token(rules, &rule_tmp.rule) != 0)
1527                 goto invalid;
1528
1529         /* add tokens to list, sorted by type */
1530         if (sort_token(rules, &rule_tmp) != 0)
1531                 goto invalid;
1532
1533         return 0;
1534 invalid:
1535         err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1536         return -1;
1537 }
1538
1539 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1540 {
1541         FILE *f;
1542         unsigned int first_token;
1543         char line[UTIL_LINE_SIZE];
1544         int line_nr = 0;
1545         unsigned int i;
1546
1547         info(rules->udev, "reading '%s' as rules file\n", filename);
1548
1549         f = fopen(filename, "r");
1550         if (f == NULL)
1551                 return -1;
1552
1553         first_token = rules->token_cur;
1554
1555         while(fgets(line, sizeof(line), f) != NULL) {
1556                 char *key;
1557                 size_t len;
1558
1559                 /* skip whitespace */
1560                 line_nr++;
1561                 key = line;
1562                 while (isspace(key[0]))
1563                         key++;
1564
1565                 /* comment */
1566                 if (key[0] == '#')
1567                         continue;
1568
1569                 len = strlen(line);
1570                 if (len < 3)
1571                         continue;
1572
1573                 /* continue reading if backslash+newline is found */
1574                 while (line[len-2] == '\\') {
1575                         if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1576                                 break;
1577                         line_nr++;
1578                         len = strlen(line);
1579                 }
1580
1581                 if (len+1 >= sizeof(line)) {
1582                         err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1583                         continue;
1584                 }
1585                 add_rule(rules, key, filename, filename_off, line_nr);
1586         }
1587         fclose(f);
1588
1589         /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1590         for (i = first_token+1; i < rules->token_cur; i++) {
1591                 if (rules->tokens[i].type == TK_A_GOTO) {
1592                         char *label = &rules->buf[rules->tokens[i].key.value_off];
1593                         unsigned int j;
1594
1595                         for (j = i+1; j < rules->token_cur; j++) {
1596                                 if (rules->tokens[j].type != TK_RULE)
1597                                         continue;
1598                                 if (rules->tokens[j].rule.label_off == 0)
1599                                         continue;
1600                                 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1601                                         continue;
1602                                 rules->tokens[i].key.rule_goto = j;
1603                                 break;
1604                         }
1605                         if (rules->tokens[i].key.rule_goto == 0)
1606                                 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1607                 }
1608         }
1609         return 0;
1610 }
1611
1612 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1613 {
1614         DIR *dir;
1615         char filename[UTIL_PATH_SIZE];
1616
1617         dbg(udev, "open directory '%s'\n", dirname);
1618         dir = opendir(dirname);
1619         if (dir == NULL) {
1620                 info(udev, "unable to open '%s': %m\n", dirname);
1621                 return -1;
1622         }
1623
1624         while (1) {
1625                 struct dirent *dent;
1626
1627                 dent = readdir(dir);
1628                 if (dent == NULL || dent->d_name[0] == '\0')
1629                         break;
1630
1631                 if (dent->d_name[0] == '.')
1632                         continue;
1633
1634                 /* look for file matching with specified suffix */
1635                 if (suffix != NULL) {
1636                         const char *ext;
1637
1638                         ext = strrchr(dent->d_name, '.');
1639                         if (ext == NULL)
1640                                 continue;
1641                         if (strcmp(ext, suffix) != 0)
1642                                 continue;
1643                 }
1644                 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1645                 dbg(udev, "put file '%s' into list\n", filename);
1646                 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1647         }
1648
1649         closedir(dir);
1650         return 0;
1651 }
1652
1653 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1654 {
1655         struct udev_rules *rules;
1656         struct stat statbuf;
1657         struct udev_list_node file_list;
1658         struct udev_list_entry *file_loop, *file_tmp;
1659         struct token end_token;
1660
1661         rules = malloc(sizeof(struct udev_rules));
1662         if (rules == NULL)
1663                 return NULL;
1664         memset(rules, 0x00, sizeof(struct udev_rules));
1665         rules->udev = udev;
1666         rules->resolve_names = resolve_names;
1667         udev_list_init(&file_list);
1668
1669         /* init token array and string buffer */
1670         rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1671         if (rules->tokens == NULL)
1672                 return NULL;
1673         rules->token_max = PREALLOC_TOKEN;
1674
1675         rules->buf = malloc(PREALLOC_STRBUF);
1676         if (rules->buf == NULL)
1677                 return NULL;
1678         rules->buf_max = PREALLOC_STRBUF;
1679         /* offset 0 is always '\0' */
1680         rules->buf[0] = '\0';
1681         rules->buf_cur = 1;
1682         dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1683             rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1684
1685         rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1686         if (rules->trie_nodes == NULL)
1687                 return NULL;
1688         rules->trie_nodes_max = PREALLOC_TRIE;
1689         /* offset 0 is the trie root, with an empty string */
1690         memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1691         rules->trie_nodes_cur = 1;
1692
1693         if (udev_get_rules_path(udev) != NULL) {
1694                 /* custom rules location for testing */
1695                 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1696         } else {
1697                 char filename[PATH_MAX];
1698                 struct udev_list_node sort_list;
1699                 struct udev_list_entry *sort_loop, *sort_tmp;
1700
1701                 /* read user/custom rules */
1702                 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1703
1704                 /* read dynamic/temporary rules */
1705                 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
1706                 if (stat(filename, &statbuf) != 0) {
1707                         util_create_path(udev, filename);
1708                         udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1709                         mkdir(filename, 0755);
1710                         udev_selinux_resetfscreatecon(udev);
1711                 }
1712                 udev_list_init(&sort_list);
1713                 add_matching_files(udev, &sort_list, filename, ".rules");
1714
1715                 /* read default rules */
1716                 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1717
1718                 /* sort all rules files by basename into list of files */
1719                 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1720                         const char *sort_name = udev_list_entry_get_name(sort_loop);
1721                         const char *sort_base = strrchr(sort_name, '/');
1722
1723                         if (sort_base == NULL)
1724                                 continue;
1725                         /* sort entry into existing list */
1726                         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1727                                 const char *file_name = udev_list_entry_get_name(file_loop);
1728                                 const char *file_base = strrchr(file_name, '/');
1729
1730                                 if (file_base == NULL)
1731                                         continue;
1732                                 if (strcmp(file_base, sort_base) == 0) {
1733                                         info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1734                                              file_name, sort_name);
1735                                         udev_list_entry_delete(sort_loop);
1736                                         sort_loop = NULL;
1737                                         break;
1738                                 }
1739                                 if (strcmp(file_base, sort_base) > 0) {
1740                                         /* found later file, insert before */
1741                                         udev_list_entry_remove(sort_loop);
1742                                         udev_list_entry_insert_before(sort_loop, file_loop);
1743                                         sort_loop = NULL;
1744                                         break;
1745                                 }
1746                         }
1747                         /* current file already handled */
1748                         if (sort_loop == NULL)
1749                                 continue;
1750                         /* no later file, append to end of list */
1751                         udev_list_entry_remove(sort_loop);
1752                         udev_list_entry_append(sort_loop, &file_list);
1753                 }
1754         }
1755
1756         /* add all filenames to the string buffer */
1757         udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1758                 const char *filename = udev_list_entry_get_name(file_loop);
1759                 unsigned int filename_off;
1760
1761                 filename_off = add_string(rules, filename);
1762                 /* the offset in the rule is limited to unsigned short */
1763                 if (filename_off < USHRT_MAX)
1764                         udev_list_entry_set_flag(file_loop, filename_off);
1765         }
1766
1767         /* parse list of files */
1768         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1769                 const char *filename = udev_list_entry_get_name(file_loop);
1770                 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1771
1772                 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1773                         parse_file(rules, filename, filename_off);
1774                 else
1775                         info(udev, "can not read '%s'\n", filename);
1776                 udev_list_entry_delete(file_loop);
1777         }
1778
1779         memset(&end_token, 0x00, sizeof(struct token));
1780         end_token.type = TK_END;
1781         add_token(rules, &end_token);
1782
1783         /* shrink allocated token and string buffer */
1784         if (rules->token_cur < rules->token_max) {
1785                 struct token *tokens;
1786
1787                 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1788                 if (tokens != NULL || rules->token_cur == 0) {
1789                         rules->tokens = tokens;
1790                         rules->token_max = rules->token_cur;
1791                 }
1792         }
1793         if (rules->buf_cur < rules->buf_max) {
1794                 char *buf;
1795
1796                 buf = realloc(rules->buf, rules->buf_cur);
1797                 if (buf != NULL || rules->buf_cur == 0) {
1798                         rules->buf = buf;
1799                         rules->buf_max = rules->buf_cur;
1800                 }
1801         }
1802         info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1803              rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1804         info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1805              rules->trie_nodes_cur * sizeof(struct trie_node),
1806              rules->trie_nodes_cur, sizeof(struct trie_node));
1807
1808         /* cleanup trie */
1809         free(rules->trie_nodes);
1810         rules->trie_nodes = NULL;
1811         rules->trie_nodes_cur = 0;
1812         rules->trie_nodes_max = 0;
1813
1814         /* cleanup uid/gid cache */
1815         free(rules->uids);
1816         rules->uids = NULL;
1817         rules->uids_cur = 0;
1818         rules->uids_max = 0;
1819         free(rules->gids);
1820         rules->gids = NULL;
1821         rules->gids_cur = 0;
1822         rules->gids_max = 0;
1823
1824         dump_rules(rules);
1825         return rules;
1826 }
1827
1828 void udev_rules_unref(struct udev_rules *rules)
1829 {
1830         if (rules == NULL)
1831                 return;
1832         free(rules->tokens);
1833         free(rules->buf);
1834         free(rules->trie_nodes);
1835         free(rules->uids);
1836         free(rules->gids);
1837         free(rules);
1838 }
1839
1840 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1841 {
1842         char *key_value = &rules->buf[token->key.value_off];
1843         char *pos;
1844         int match = 0;
1845
1846         if (val == NULL)
1847                 val = "";
1848
1849         switch (token->key.glob) {
1850         case GL_PLAIN:
1851                 match = (strcmp(key_value, val) == 0);
1852                 break;
1853         case GL_GLOB:
1854                 match = (fnmatch(key_value, val, 0) == 0);
1855                 break;
1856         case GL_SPLIT:
1857                 {
1858                         const char *split;
1859                         size_t len;
1860
1861                         split = &rules->buf[token->key.value_off];
1862                         len = strlen(val);
1863                         while (1) {
1864                                 const char *next;
1865
1866                                 next = strchr(split, '|');
1867                                 if (next != NULL) {
1868                                         size_t matchlen = (size_t)(next - split);
1869
1870                                         match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1871                                         if (match)
1872                                                 break;
1873                                 } else {
1874                                         match = (strcmp(split, val) == 0);
1875                                         break;
1876                                 }
1877                                 split = &next[1];
1878                         }
1879                         break;
1880                 }
1881         case GL_SPLIT_GLOB:
1882                 {
1883                         char value[UTIL_PATH_SIZE];
1884
1885                         util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1886                         key_value = value;
1887                         while (key_value != NULL) {
1888                                 pos = strchr(key_value, '|');
1889                                 if (pos != NULL) {
1890                                         pos[0] = '\0';
1891                                         pos = &pos[1];
1892                                 }
1893                                 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1894                                 match = (fnmatch(key_value, val, 0) == 0);
1895                                 if (match)
1896                                         break;
1897                                 key_value = pos;
1898                         }
1899                         break;
1900                 }
1901         case GL_SOMETHING:
1902                 match = (val[0] != '\0');
1903                 break;
1904         case GL_FORMAT:
1905         case GL_UNSET:
1906                 return -1;
1907         }
1908
1909         if (match && (token->key.op == OP_MATCH)) {
1910                 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1911                 return 0;
1912         }
1913         if (!match && (token->key.op == OP_NOMATCH)) {
1914                 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1915                 return 0;
1916         }
1917         dbg(rules->udev, "%s is not true\n", token_str(token->type));
1918         return -1;
1919 }
1920
1921 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1922 {
1923         const char *key_name = &rules->buf[cur->key.attr_off];
1924         const char *key_value = &rules->buf[cur->key.value_off];
1925         char value[UTIL_NAME_SIZE];
1926         size_t len;
1927
1928         value[0] = '\0';
1929         if (key_name[0] == '[') {
1930                 char attr[UTIL_PATH_SIZE];
1931
1932                 util_strscpy(attr, sizeof(attr), key_name);
1933                 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
1934         }
1935         if (value[0] == '\0') {
1936                 const char *val;
1937
1938                 val = udev_device_get_sysattr_value(dev, key_name);
1939                 if (val == NULL)
1940                         return -1;
1941                 util_strscpy(value, sizeof(value), val);
1942         }
1943
1944         /* strip trailing whitespace of value, if not asked to match for it */
1945         len = strlen(key_value);
1946         if (len > 0 && !isspace(key_value[len-1])) {
1947                 len = strlen(value);
1948                 while (len > 0 && isspace(value[--len]))
1949                         value[len] = '\0';
1950                 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1951         }
1952         return match_key(rules, cur, value);
1953 }
1954
1955 enum escape_type {
1956         ESCAPE_UNSET,
1957         ESCAPE_NONE,
1958         ESCAPE_REPLACE,
1959 };
1960
1961 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
1962 {
1963         struct token *cur;
1964         struct token *rule;
1965         enum escape_type esc = ESCAPE_UNSET;
1966         int can_set_name;
1967
1968         if (rules->tokens == NULL)
1969                 return -1;
1970
1971         can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
1972                          strcmp(udev_device_get_action(event->dev), "change") == 0) &&
1973                         (major(udev_device_get_devnum(event->dev)) > 0 ||
1974                          strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
1975
1976         /* loop through token list, match, run actions or forward to next rule */
1977         cur = &rules->tokens[0];
1978         rule = cur;
1979         while (1) {
1980                 dump_token(rules, cur);
1981                 switch (cur->type) {
1982                 case TK_RULE:
1983                         /* current rule */
1984                         rule = cur;
1985                         /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1986                         if (!can_set_name && rule->rule.flags)
1987                                 goto nomatch;
1988                         esc = ESCAPE_UNSET;
1989                         break;
1990                 case TK_M_ACTION:
1991                         if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1992                                 goto nomatch;
1993                         break;
1994                 case TK_M_DEVPATH:
1995                         if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1996                                 goto nomatch;
1997                         break;
1998                 case TK_M_KERNEL:
1999                         if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2000                                 goto nomatch;
2001                         break;
2002                 case TK_M_DEVLINK:
2003                         {
2004                                 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2005                                 struct udev_list_entry *list_entry;
2006                                 int match = 0;
2007
2008                                 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2009                                         const char *devlink;
2010
2011                                         devlink =  &udev_list_entry_get_name(list_entry)[devlen];
2012                                         if (match_key(rules, cur, devlink) == 0) {
2013                                                 match = 1;
2014                                                 break;
2015                                         }
2016                                 }
2017                                 if (!match)
2018                                         goto nomatch;
2019                                 break;
2020                         }
2021                 case TK_M_NAME:
2022                         if (match_key(rules, cur, event->name) != 0)
2023                                 goto nomatch;
2024                         break;
2025                 case TK_M_ENV:
2026                         {
2027                                 const char *key_name = &rules->buf[cur->key.attr_off];
2028                                 const char *value;
2029
2030                                 value = udev_device_get_property_value(event->dev, key_name);
2031                                 if (value == NULL) {
2032                                         dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2033                                         value = "";
2034                                 }
2035                                 if (match_key(rules, cur, value))
2036                                         goto nomatch;
2037                                 break;
2038                         }
2039                 case TK_M_SUBSYSTEM:
2040                         if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2041                                 goto nomatch;
2042                         break;
2043                 case TK_M_DRIVER:
2044                         if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2045                                 goto nomatch;
2046                         break;
2047                 case TK_M_WAITFOR:
2048                         {
2049                                 char filename[UTIL_PATH_SIZE];
2050                                 int found;
2051
2052                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2053                                 found = (wait_for_file(event->dev, filename, 10) == 0);
2054                                 if (!found && (cur->key.op != OP_NOMATCH))
2055                                         goto nomatch;
2056                                 break;
2057                         }
2058                 case TK_M_ATTR:
2059                         if (match_attr(rules, event->dev, event, cur) != 0)
2060                                 goto nomatch;
2061                         break;
2062                 case TK_M_KERNELS:
2063                 case TK_M_SUBSYSTEMS:
2064                 case TK_M_DRIVERS:
2065                 case TK_M_ATTRS:
2066                         {
2067                                 struct token *next;
2068
2069                                 /* get whole sequence of parent matches */
2070                                 next = cur;
2071                                 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2072                                         next++;
2073
2074                                 /* loop over parents */
2075                                 event->dev_parent = event->dev;
2076                                 while (1) {
2077                                         struct token *key;
2078
2079                                         dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2080                                         /* loop over sequence of parent match keys */
2081                                         for (key = cur; key < next; key++ ) {
2082                                                 dump_token(rules, key);
2083                                                 switch(key->type) {
2084                                                 case TK_M_KERNELS:
2085                                                         if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2086                                                                 goto try_parent;
2087                                                         break;
2088                                                 case TK_M_SUBSYSTEMS:
2089                                                         if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2090                                                                 goto try_parent;
2091                                                         break;
2092                                                 case TK_M_DRIVERS:
2093                                                         if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2094                                                                 goto try_parent;
2095                                                         break;
2096                                                 case TK_M_ATTRS:
2097                                                         if (match_attr(rules, event->dev_parent, event, key) != 0)
2098                                                                 goto try_parent;
2099                                                         break;
2100                                                 default:
2101                                                         goto nomatch;
2102                                                 }
2103                                                 dbg(event->udev, "parent key matched\n");
2104                                         }
2105                                         dbg(event->udev, "all parent keys matched\n");
2106                                         /* all keys matched */
2107                                         break;
2108
2109                                 try_parent:
2110                                         event->dev_parent = udev_device_get_parent(event->dev_parent);
2111                                         if (event->dev_parent == NULL)
2112                                                 goto nomatch;
2113                                 }
2114                                 /* move behind our sequence of parent match keys */
2115                                 cur = next;
2116                                 continue;
2117                         }
2118                 case TK_M_TEST:
2119                         {
2120                                 char filename[UTIL_PATH_SIZE];
2121                                 struct stat statbuf;
2122                                 int match;
2123
2124                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2125                                 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2126                                         if (filename[0] != '/') {
2127                                                 char tmp[UTIL_PATH_SIZE];
2128
2129                                                 util_strscpy(tmp, sizeof(tmp), filename);
2130                                                 util_strscpyl(filename, sizeof(filename),
2131                                                               udev_device_get_syspath(event->dev), "/", tmp, NULL);
2132                                         }
2133                                 }
2134                                 attr_subst_subdir(filename, sizeof(filename));
2135
2136                                 match = (stat(filename, &statbuf) == 0);
2137                                 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2138                                 if (match && cur->key.mode > 0) {
2139                                         match = ((statbuf.st_mode & cur->key.mode) > 0);
2140                                         dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2141                                             match ? "matches" : "does not match", cur->key.mode);
2142                                 }
2143                                 if (match && cur->key.op == OP_NOMATCH)
2144                                         goto nomatch;
2145                                 if (!match && cur->key.op == OP_MATCH)
2146                                         goto nomatch;
2147                                 break;
2148                         }
2149                 case TK_M_PROGRAM:
2150                         {
2151                                 char program[UTIL_PATH_SIZE];
2152                                 char **envp;
2153                                 char result[UTIL_PATH_SIZE];
2154
2155                                 free(event->program_result);
2156                                 event->program_result = NULL;
2157                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2158                                 envp = udev_device_get_properties_envp(event->dev);
2159                                 info(event->udev, "PROGRAM '%s' %s:%u\n",
2160                                      program,
2161                                      &rules->buf[rule->rule.filename_off],
2162                                      rule->rule.filename_line);
2163                                 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2164                                         if (cur->key.op != OP_NOMATCH)
2165                                                 goto nomatch;
2166                                 } else {
2167                                         int count;
2168
2169                                         util_remove_trailing_chars(result, '\n');
2170                                         if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2171                                                 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2172                                                 if (count > 0)
2173                                                         info(event->udev, "%i character(s) replaced\n" , count);
2174                                         }
2175                                         event->program_result = strdup(result);
2176                                         dbg(event->udev, "storing result '%s'\n", event->program_result);
2177                                         if (cur->key.op == OP_NOMATCH)
2178                                                 goto nomatch;
2179                                 }
2180                                 break;
2181                         }
2182                 case TK_M_IMPORT_FILE:
2183                         {
2184                                 char import[UTIL_PATH_SIZE];
2185
2186                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2187                                 if (import_file_into_properties(event->dev, import) != 0)
2188                                         if (cur->key.op != OP_NOMATCH)
2189                                                 goto nomatch;
2190                                 break;
2191                         }
2192                 case TK_M_IMPORT_PROG:
2193                         {
2194                                 char import[UTIL_PATH_SIZE];
2195
2196                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2197                                 info(event->udev, "IMPORT '%s' %s:%u\n",
2198                                      import,
2199                                      &rules->buf[rule->rule.filename_off],
2200                                      rule->rule.filename_line);
2201                                 if (import_program_into_properties(event->dev, import) != 0)
2202                                         if (cur->key.op != OP_NOMATCH)
2203                                                 goto nomatch;
2204                                 break;
2205                         }
2206                 case TK_M_IMPORT_PARENT:
2207                         {
2208                                 char import[UTIL_PATH_SIZE];
2209
2210                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2211                                 if (import_parent_into_properties(event->dev, import) != 0)
2212                                         if (cur->key.op != OP_NOMATCH)
2213                                                 goto nomatch;
2214                                 break;
2215                         }
2216                 case TK_M_RESULT:
2217                         if (match_key(rules, cur, event->program_result) != 0)
2218                                 goto nomatch;
2219                         break;
2220
2221                 case TK_A_IGNORE_DEVICE:
2222                         event->ignore_device = 1;
2223                         return 0;
2224                         break;
2225                 case TK_A_STRING_ESCAPE_NONE:
2226                         esc = ESCAPE_NONE;
2227                         break;
2228                 case TK_A_STRING_ESCAPE_REPLACE:
2229                         esc = ESCAPE_REPLACE;
2230                         break;
2231                 case TK_A_NUM_FAKE_PART:
2232                         if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2233                                 break;
2234                         if (udev_device_get_sysnum(event->dev) != NULL)
2235                                 break;
2236                         udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2237                         break;
2238                 case TK_A_INOTIFY_WATCH:
2239                         event->inotify_watch = cur->key.watch;
2240                         break;
2241                 case TK_A_DEVLINK_PRIO:
2242                         udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2243                         break;
2244                 case TK_A_OWNER:
2245                         {
2246                                 char owner[UTIL_NAME_SIZE];
2247
2248                                 if (event->owner_final)
2249                                         break;
2250                                 if (cur->key.op == OP_ASSIGN_FINAL)
2251                                         event->owner_final = 1;
2252                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2253                                 event->uid = util_lookup_user(event->udev, owner);
2254                                 info(event->udev, "OWNER %u %s:%u\n",
2255                                      event->uid,
2256                                      &rules->buf[rule->rule.filename_off],
2257                                      rule->rule.filename_line);
2258                                 break;
2259                         }
2260                 case TK_A_GROUP:
2261                         {
2262                                 char group[UTIL_NAME_SIZE];
2263
2264                                 if (event->group_final)
2265                                         break;
2266                                 if (cur->key.op == OP_ASSIGN_FINAL)
2267                                         event->group_final = 1;
2268                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2269                                 event->gid = util_lookup_group(event->udev, group);
2270                                 info(event->udev, "GROUP %u %s:%u\n",
2271                                      event->gid,
2272                                      &rules->buf[rule->rule.filename_off],
2273                                      rule->rule.filename_line);
2274                                 break;
2275                         }
2276                 case TK_A_MODE:
2277                         {
2278                                 char mode[UTIL_NAME_SIZE];
2279                                 char *endptr;
2280
2281                                 if (event->mode_final)
2282                                         break;
2283                                 if (cur->key.op == OP_ASSIGN_FINAL)
2284                                         event->mode_final = 1;
2285                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode, sizeof(mode));
2286                                 event->mode = strtol(mode, &endptr, 8);
2287                                 if (endptr[0] != '\0') {
2288                                         err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2289                                         event->mode = 0660;
2290                                 }
2291                                 info(event->udev, "MODE %#o %s:%u\n",
2292                                      event->mode,
2293                                      &rules->buf[rule->rule.filename_off],
2294                                      rule->rule.filename_line);
2295                                 break;
2296                         }
2297                 case TK_A_OWNER_ID:
2298                         if (event->owner_final)
2299                                 break;
2300                         if (cur->key.op == OP_ASSIGN_FINAL)
2301                                 event->owner_final = 1;
2302                         event->uid = cur->key.uid;
2303                         info(event->udev, "OWNER %u %s:%u\n",
2304                              event->uid,
2305                              &rules->buf[rule->rule.filename_off],
2306                              rule->rule.filename_line);
2307                         break;
2308                 case TK_A_GROUP_ID:
2309                         if (event->group_final)
2310                                 break;
2311                         if (cur->key.op == OP_ASSIGN_FINAL)
2312                                 event->group_final = 1;
2313                         event->gid = cur->key.gid;
2314                         info(event->udev, "GROUP %u %s:%u\n",
2315                              event->gid,
2316                              &rules->buf[rule->rule.filename_off],
2317                              rule->rule.filename_line);
2318                         break;
2319                 case TK_A_MODE_ID:
2320                         if (event->mode_final)
2321                                 break;
2322                         if (cur->key.op == OP_ASSIGN_FINAL)
2323                                 event->mode_final = 1;
2324                         event->mode = cur->key.mode;
2325                         info(event->udev, "MODE %#o %s:%u\n",
2326                              event->mode,
2327                              &rules->buf[rule->rule.filename_off],
2328                              rule->rule.filename_line);
2329                         break;
2330                 case TK_A_ENV:
2331                         {
2332                                 const char *name = &rules->buf[cur->key.attr_off];
2333                                 char *value = &rules->buf[cur->key.value_off];
2334
2335                                 if (value[0] != '\0') {
2336                                         char temp_value[UTIL_NAME_SIZE];
2337                                         struct udev_list_entry *entry;
2338
2339                                         udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2340                                         entry = udev_device_add_property(event->dev, name, temp_value);
2341                                         /* store in db */
2342                                         udev_list_entry_set_flag(entry, 1);
2343                                 } else {
2344                                         udev_device_add_property(event->dev, name, NULL);
2345                                 }
2346                                 break;
2347                         }
2348                 case TK_A_NAME:
2349                         {
2350                                 const char *name  = &rules->buf[cur->key.value_off];
2351                                 char name_str[UTIL_PATH_SIZE];
2352                                 int count;
2353
2354                                 if (event->name_final)
2355                                         break;
2356                                 if (cur->key.op == OP_ASSIGN_FINAL)
2357                                         event->name_final = 1;
2358                                 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2359                                 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2360                                         count = udev_util_replace_chars(name_str, "/");
2361                                         if (count > 0)
2362                                                 info(event->udev, "%i character(s) replaced\n", count);
2363                                 }
2364                                 free(event->name);
2365                                 event->name = strdup(name_str);
2366                                 info(event->udev, "NAME '%s' %s:%u\n",
2367                                      event->name,
2368                                      &rules->buf[rule->rule.filename_off],
2369                                      rule->rule.filename_line);
2370                                 break;
2371                         }
2372                 case TK_A_DEVLINK:
2373                         {
2374                                 char temp[UTIL_PATH_SIZE];
2375                                 char filename[UTIL_PATH_SIZE];
2376                                 char *pos, *next;
2377                                 int count = 0;
2378
2379                                 if (event->devlink_final)
2380                                         break;
2381                                 if (major(udev_device_get_devnum(event->dev)) == 0)
2382                                         break;
2383                                 if (cur->key.op == OP_ASSIGN_FINAL)
2384                                         event->devlink_final = 1;
2385                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2386                                         udev_device_cleanup_devlinks_list(event->dev);
2387
2388                                 /* allow  multiple symlinks separated by spaces */
2389                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2390                                 if (esc == ESCAPE_UNSET)
2391                                         count = udev_util_replace_chars(temp, "/ ");
2392                                 else if (esc == ESCAPE_REPLACE)
2393                                         count = udev_util_replace_chars(temp, "/");
2394                                 if (count > 0)
2395                                         info(event->udev, "%i character(s) replaced\n" , count);
2396                                 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2397                                 pos = temp;
2398                                 while (isspace(pos[0]))
2399                                         pos++;
2400                                 next = strchr(pos, ' ');
2401                                 while (next) {
2402                                         next[0] = '\0';
2403                                         info(event->udev, "LINK '%s' %s:%u\n",
2404                                              pos,
2405                                              &rules->buf[rule->rule.filename_off],
2406                                              rule->rule.filename_line);
2407                                         util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2408                                         udev_device_add_devlink(event->dev, filename);
2409                                         while (isspace(next[1]))
2410                                                 next++;
2411                                         pos = &next[1];
2412                                         next = strchr(pos, ' ');
2413                                 }
2414                                 if (pos[0] != '\0') {
2415                                         info(event->udev, "LINK '%s' %s:%u\n",
2416                                              pos,
2417                                              &rules->buf[rule->rule.filename_off],
2418                                              rule->rule.filename_line);
2419                                         util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2420                                         udev_device_add_devlink(event->dev, filename);
2421                                 }
2422                         }
2423                         break;
2424                 case TK_A_EVENT_TIMEOUT:
2425                         udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2426                         break;
2427                 case TK_A_IGNORE_REMOVE:
2428                         udev_device_set_ignore_remove(event->dev, 1);
2429                         break;
2430                 case TK_A_ATTR:
2431                         {
2432                                 const char *key_name = &rules->buf[cur->key.attr_off];
2433                                 char attr[UTIL_PATH_SIZE];
2434                                 char value[UTIL_NAME_SIZE];
2435                                 FILE *f;
2436
2437                                 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2438                                         util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2439                                 attr_subst_subdir(attr, sizeof(attr));
2440
2441                                 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2442                                 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2443                                      &rules->buf[rule->rule.filename_off],
2444                                      rule->rule.filename_line);
2445                                 f = fopen(attr, "w");
2446                                 if (f != NULL) {
2447                                         if (fprintf(f, "%s", value) <= 0)
2448                                                 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2449                                         fclose(f);
2450                                 } else {
2451                                         err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2452                                 }
2453                                 break;
2454                         }
2455                 case TK_A_RUN:
2456                         {
2457                                 struct udev_list_entry *list_entry;
2458
2459                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2460                                         udev_list_cleanup_entries(event->udev, &event->run_list);
2461                                 info(event->udev, "RUN '%s' %s:%u\n",
2462                                      &rules->buf[cur->key.value_off],
2463                                      &rules->buf[rule->rule.filename_off],
2464                                      rule->rule.filename_line);
2465                                 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2466                                                                  &rules->buf[cur->key.value_off], NULL, 1, 0);
2467                                 if (cur->key.ignore_error)
2468                                         udev_list_entry_set_flag(list_entry, 1);
2469                                 break;
2470                         }
2471                 case TK_A_GOTO:
2472                         if (cur->key.rule_goto == 0)
2473                                 break;
2474                         cur = &rules->tokens[cur->key.rule_goto];
2475                         continue;
2476                 case TK_A_LAST_RULE:
2477                 case TK_END:
2478                         return 0;
2479
2480                 case TK_M_PARENTS_MIN:
2481                 case TK_M_PARENTS_MAX:
2482                 case TK_M_MAX:
2483                 case TK_UNSET:
2484                         err(rules->udev, "wrong type %u\n", cur->type);
2485                         goto nomatch;
2486                 }
2487
2488                 cur++;
2489                 continue;
2490         nomatch:
2491                 /* fast-forward to next rule */
2492                 cur = rule + rule->rule.token_count;
2493                 dbg(rules->udev, "forward to rule: %u\n",
2494                                  (unsigned int) (cur - rules->tokens));
2495         }
2496 }