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_NUM_FAKE_PART,             /* int */
 144         TK_A_DEVLINK_PRIO,              /* int */
 145         TK_A_OWNER,                     /* val */
 146         TK_A_GROUP,                     /* val */
 147         TK_A_MODE,                      /* val */
 148         TK_A_OWNER_ID,                  /* uid_t */
 149         TK_A_GROUP_ID,                  /* gid_t */
 150         TK_A_MODE_ID,                   /* mode_t */
 151         TK_A_ENV,                       /* val, attr */
 152         TK_A_NAME,                      /* val */
 153         TK_A_DEVLINK,                   /* val */
 154         TK_A_EVENT_TIMEOUT,             /* int */
 155         TK_A_IGNORE_REMOVE,
 156         TK_A_ATTR,                      /* val, attr */
 157         TK_A_RUN,                       /* val, bool */
 158         TK_A_GOTO,                      /* size_t */
 159         TK_A_LAST_RULE,
 160
 161         TK_END,
 162 };
 163
 164 /* we try to pack stuff in a way that we take only 12 bytes per token */
 165 struct token {
 166         union {
 167                 unsigned char type;             /* same as in rule and key */
 168                 struct {
 169                         unsigned char type;
 170                         unsigned char flags;
 171                         unsigned short token_count;
 172                         unsigned int label_off;
 173                         unsigned short filename_off;
 174                         unsigned short filename_line;
 175                 } rule;
 176                 struct {
 177                         unsigned char type;
 178                         unsigned char flags;
 179                         unsigned char op;
 180                         unsigned char glob;
 181                         unsigned int value_off;
 182                         union {
 183                                 unsigned int attr_off;
 184                                 int ignore_error;
 185                                 int i;
 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                         };
 194                 } key;
 195         };
 196 };
 197
 198 #define MAX_TK          64
 199 struct rule_tmp {
 200         struct udev_rules *rules;
 201         struct token rule;
 202         struct token token[MAX_TK];
 203         unsigned int token_cur;
 204 };
 205
 206 #ifdef DEBUG
 207 static const char *operation_str(enum operation_type type)
 208 {
 209         static const char *operation_strs[] = {
 210                 [OP_UNSET] =            "UNSET",
 211                 [OP_MATCH] =            "match",
 212                 [OP_NOMATCH] =          "nomatch",
 213                 [OP_MATCH_MAX] =        "MATCH_MAX",
 214
 215                 [OP_ADD] =              "add",
 216                 [OP_ASSIGN] =           "assign",
 217                 [OP_ASSIGN_FINAL] =     "assign-final",
 218 }       ;
 219
 220         return operation_strs[type];
 221 }
 222
 223 static const char *string_glob_str(enum string_glob_type type)
 224 {
 225         static const char *string_glob_strs[] = {
 226                 [GL_UNSET] =            "UNSET",
 227                 [GL_PLAIN] =            "plain",
 228                 [GL_GLOB] =             "glob",
 229                 [GL_SPLIT] =            "split",
 230                 [GL_SPLIT_GLOB] =       "split-glob",
 231                 [GL_SOMETHING] =        "split-glob",
 232                 [GL_FORMAT] =           "format",
 233         };
 234
 235         return string_glob_strs[type];
 236 }
 237
 238 static const char *token_str(enum token_type type)
 239 {
 240         static const char *token_strs[] = {
 241                 [TK_UNSET] =                    "UNSET",
 242                 [TK_RULE] =                     "RULE",
 243
 244                 [TK_M_ACTION] =                 "M ACTION",
 245                 [TK_M_DEVPATH] =                "M DEVPATH",
 246                 [TK_M_KERNEL] =                 "M KERNEL",
 247                 [TK_M_DEVLINK] =                "M DEVLINK",
 248                 [TK_M_NAME] =                   "M NAME",
 249                 [TK_M_ENV] =                    "M ENV",
 250                 [TK_M_SUBSYSTEM] =              "M SUBSYSTEM",
 251                 [TK_M_DRIVER] =                 "M DRIVER",
 252                 [TK_M_WAITFOR] =                "M WAITFOR",
 253                 [TK_M_ATTR] =                   "M ATTR",
 254
 255                 [TK_M_PARENTS_MIN] =            "M PARENTS_MIN",
 256                 [TK_M_KERNELS] =                "M KERNELS",
 257                 [TK_M_SUBSYSTEMS] =             "M SUBSYSTEMS",
 258                 [TK_M_DRIVERS] =                "M DRIVERS",
 259                 [TK_M_ATTRS] =                  "M ATTRS",
 260                 [TK_M_PARENTS_MAX] =            "M PARENTS_MAX",
 261
 262                 [TK_M_TEST] =                   "M TEST",
 263                 [TK_M_PROGRAM] =                "M PROGRAM",
 264                 [TK_M_IMPORT_FILE] =            "M IMPORT_FILE",
 265                 [TK_M_IMPORT_PROG] =            "M IMPORT_PROG",
 266                 [TK_M_IMPORT_PARENT] =          "M MPORT_PARENT",
 267                 [TK_M_RESULT] =                 "M RESULT",
 268                 [TK_M_MAX] =                    "M MAX",
 269
 270                 [TK_A_IGNORE_DEVICE] =          "A IGNORE_DEVICE",
 271                 [TK_A_STRING_ESCAPE_NONE] =     "A STRING_ESCAPE_NONE",
 272                 [TK_A_STRING_ESCAPE_REPLACE] =  "A STRING_ESCAPE_REPLACE",
 273                 [TK_A_NUM_FAKE_PART] =          "A NUM_FAKE_PART",
 274                 [TK_A_DEVLINK_PRIO] =           "A DEVLINK_PRIO",
 275                 [TK_A_OWNER] =                  "A OWNER",
 276                 [TK_A_GROUP] =                  "A GROUP",
 277                 [TK_A_MODE] =                   "A MODE",
 278                 [TK_A_OWNER_ID] =               "A OWNER_ID",
 279                 [TK_A_GROUP_ID] =               "A GROUP_ID",
 280                 [TK_A_MODE_ID] =                "A MODE_ID",
 281                 [TK_A_ENV] =                    "A ENV",
 282                 [TK_A_NAME] =                   "A NAME",
 283                 [TK_A_DEVLINK] =                "A DEVLINK",
 284                 [TK_A_EVENT_TIMEOUT] =          "A EVENT_TIMEOUT",
 285                 [TK_A_IGNORE_REMOVE] =          "A IGNORE_REMOVE",
 286                 [TK_A_ATTR] =                   "A ATTR",
 287                 [TK_A_RUN] =                    "A RUN",
 288                 [TK_A_GOTO] =                   "A GOTO",
 289                 [TK_A_LAST_RULE] =              "A LAST_RULE",
 290
 291                 [TK_END] =                      "END",
 292         };
 293
 294         return token_strs[type];
 295 }
 296
 297 static void dump_token(struct udev_rules *rules, struct token *token)
 298 {
 299         enum token_type type = token->type;
 300         enum operation_type op = token->key.op;
 301         enum string_glob_type glob = token->key.glob;
 302         const char *value = &rules->buf[token->key.value_off];
 303         const char *attr = &rules->buf[token->key.attr_off];
 304
 305         switch (type) {
 306         case TK_RULE:
 307                 {
 308                         const char *tks_ptr = (char *)rules->tokens;
 309                         const char *tk_ptr = (char *)token;
 310                         unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
 311
 312                         dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
 313                             &rules->buf[token->rule.filename_off], token->rule.filename_line,
 314                             idx, token->rule.token_count,
 315                             &rules->buf[token->rule.label_off],
 316                             token->rule.flags);
 317                         break;
 318                 }
 319         case TK_M_ACTION:
 320         case TK_M_DEVPATH:
 321         case TK_M_KERNEL:
 322         case TK_M_SUBSYSTEM:
 323         case TK_M_DRIVER:
 324         case TK_M_WAITFOR:
 325         case TK_M_DEVLINK:
 326         case TK_M_NAME:
 327         case TK_M_KERNELS:
 328         case TK_M_SUBSYSTEMS:
 329         case TK_M_DRIVERS:
 330         case TK_M_PROGRAM:
 331         case TK_M_IMPORT_FILE:
 332         case TK_M_IMPORT_PROG:
 333         case TK_M_IMPORT_PARENT:
 334         case TK_M_RESULT:
 335         case TK_A_NAME:
 336         case TK_A_DEVLINK:
 337         case TK_A_OWNER:
 338         case TK_A_GROUP:
 339         case TK_A_MODE:
 340         case TK_A_RUN:
 341                 dbg(rules->udev, "%s %s '%s'(%s)\n",
 342                     token_str(type), operation_str(op), value, string_glob_str(glob));
 343                 break;
 344         case TK_M_ATTR:
 345         case TK_M_ATTRS:
 346         case TK_M_ENV:
 347         case TK_A_ATTR:
 348         case TK_A_ENV:
 349                 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
 350                     token_str(type), operation_str(op), attr, value, string_glob_str(glob));
 351                 break;
 352         case TK_A_IGNORE_DEVICE:
 353         case TK_A_STRING_ESCAPE_NONE:
 354         case TK_A_STRING_ESCAPE_REPLACE:
 355         case TK_A_LAST_RULE:
 356         case TK_A_IGNORE_REMOVE:
 357                 dbg(rules->udev, "%s\n", token_str(type));
 358                 break;
 359         case TK_M_TEST:
 360                 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
 361                     token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
 362                 break;
 363         case TK_A_NUM_FAKE_PART:
 364                 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
 365                 break;
 366         case TK_A_DEVLINK_PRIO:
 367                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
 368                 break;
 369         case TK_A_OWNER_ID:
 370                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
 371                 break;
 372         case TK_A_GROUP_ID:
 373                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
 374                 break;
 375         case TK_A_MODE_ID:
 376                 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
 377                 break;
 378         case TK_A_EVENT_TIMEOUT:
 379                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
 380                 break;
 381         case TK_A_GOTO:
 382                 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
 383                 break;
 384         case TK_END:
 385                 dbg(rules->udev, "* %s\n", token_str(type));
 386                 break;
 387         case TK_M_PARENTS_MIN:
 388         case TK_M_PARENTS_MAX:
 389         case TK_M_MAX:
 390         case TK_UNSET:
 391                 dbg(rules->udev, "unknown type %u\n", type);
 392                 break;
 393         }
 394 }
 395
 396 static void dump_rules(struct udev_rules *rules)
 397 {
 398         unsigned int i;
 399
 400         dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
 401             rules->token_cur,
 402             rules->token_cur * sizeof(struct token),
 403             rules->buf_count,
 404             rules->buf_cur);
 405         for(i = 0; i < rules->token_cur; i++)
 406                 dump_token(rules, &rules->tokens[i]);
 407 }
 408 #else
 409 static inline const char *operation_str(enum operation_type type) { return NULL; }
 410 static inline const char *token_str(enum token_type type) { return NULL; }
 411 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
 412 static inline void dump_rules(struct udev_rules *rules) {}
 413 #endif /* DEBUG */
 414
 415 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
 416 {
 417         int off;
 418
 419         /* grow buffer if needed */
 420         if (rules->buf_cur + bytes+1 >= rules->buf_max) {
 421                 char *buf;
 422                 unsigned int add;
 423
 424                 /* double the buffer size */
 425                 add = rules->buf_max;
 426                 if (add < bytes * 8)
 427                         add = bytes * 8;
 428
 429                 buf = realloc(rules->buf, rules->buf_max + add);
 430                 if (buf == NULL)
 431                         return -1;
 432                 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
 433                 rules->buf = buf;
 434                 rules->buf_max += add;
 435         }
 436         off = rules->buf_cur;
 437         memcpy(&rules->buf[rules->buf_cur], str, bytes);
 438         rules->buf_cur += bytes;
 439         rules->buf_count++;
 440         return off;
 441 }
 442
 443 static int add_string(struct udev_rules *rules, const char *str)
 444 {
 445         unsigned int node_idx;
 446         struct trie_node *new_node;
 447         unsigned int new_node_idx;
 448         unsigned char key;
 449         unsigned short len;
 450         unsigned int depth;
 451         unsigned int off;
 452         struct trie_node *parent;
 453
 454         len = strlen(str);
 455
 456         /* offset 0 is always '\0' */
 457         if (len == 0)
 458                 return 0;
 459
 460         /* walk trie, start from last character of str to find matching tails */
 461         node_idx = 0;
 462         key = str[len-1];
 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_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
 710                 util_strlcat(syspath, val, sizeof(syspath));
 711                 udev_device_set_syspath(dev, syspath);
 712         } else {
 713                 struct udev_list_entry *entry;
 714
 715                 entry = udev_device_add_property(dev, key, val);
 716                 /* store in db */
 717                 udev_list_entry_set_flag(entry, 1);
 718         }
 719         return 0;
 720 }
 721
 722 static int import_file_into_properties(struct udev_device *dev, const char *filename)
 723 {
 724         FILE *f;
 725         char line[UTIL_LINE_SIZE];
 726
 727         f = fopen(filename, "r");
 728         if (f == NULL)
 729                 return -1;
 730         while (fgets(line, sizeof(line), f) != NULL)
 731                 import_property_from_string(dev, line);
 732         fclose(f);
 733         return 0;
 734 }
 735
 736 static int import_program_into_properties(struct udev_device *dev, const char *program)
 737 {
 738         struct udev *udev = udev_device_get_udev(dev);
 739         char **envp;
 740         char result[2048];
 741         size_t reslen;
 742         char *line;
 743
 744         envp = udev_device_get_properties_envp(dev);
 745         if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
 746                 return -1;
 747
 748         line = result;
 749         while (line != NULL) {
 750                 char *pos;
 751
 752                 pos = strchr(line, '\n');
 753                 if (pos != NULL) {
 754                         pos[0] = '\0';
 755                         pos = &pos[1];
 756                 }
 757                 import_property_from_string(dev, line);
 758                 line = pos;
 759         }
 760         return 0;
 761 }
 762
 763 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
 764 {
 765         struct udev *udev = udev_device_get_udev(dev);
 766         struct udev_device *dev_parent;
 767         struct udev_list_entry *list_entry;
 768
 769         dev_parent = udev_device_get_parent(dev);
 770         if (dev_parent == NULL)
 771                 return -1;
 772
 773         dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
 774         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
 775                 const char *key = udev_list_entry_get_name(list_entry);
 776                 const char *val = udev_list_entry_get_value(list_entry);
 777
 778                 if (fnmatch(filter, key, 0) == 0) {
 779                         struct udev_list_entry *entry;
 780
 781                         dbg(udev, "import key '%s=%s'\n", key, val);
 782                         entry = udev_device_add_property(dev, key, val);
 783                         /* store in db */
 784                         udev_list_entry_set_flag(entry, 1);
 785                 }
 786         }
 787         return 0;
 788 }
 789
 790 #define WAIT_LOOP_PER_SECOND            50
 791 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
 792 {
 793         struct udev *udev = udev_device_get_udev(dev);
 794         char filepath[UTIL_PATH_SIZE];
 795         char devicepath[UTIL_PATH_SIZE];
 796         struct stat stats;
 797         int loop = timeout * WAIT_LOOP_PER_SECOND;
 798
 799         /* a relative path is a device attribute */
 800         devicepath[0] = '\0';
 801         if (file[0] != '/') {
 802                 util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath));
 803                 util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath));
 804
 805                 util_strlcpy(filepath, devicepath, sizeof(filepath));
 806                 util_strlcat(filepath, "/", sizeof(filepath));
 807                 util_strlcat(filepath, file, sizeof(filepath));
 808                 file = filepath;
 809         }
 810
 811         dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
 812         while (--loop) {
 813                 /* lookup file */
 814                 if (stat(file, &stats) == 0) {
 815                         info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
 816                         return 0;
 817                 }
 818                 /* make sure, the device did not disappear in the meantime */
 819                 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
 820                         info(udev, "device disappeared while waiting for '%s'\n", file);
 821                         return -2;
 822                 }
 823                 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
 824                 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
 825         }
 826         info(udev, "waiting for '%s' failed\n", file);
 827         return -1;
 828 }
 829
 830 static int attr_subst_subdir(char *attr, size_t len)
 831 {
 832         char *pos;
 833         int found = 0;
 834
 835         pos = strstr(attr, "/*/");
 836         if (pos != NULL) {
 837                 char str[UTIL_PATH_SIZE];
 838                 DIR *dir;
 839
 840                 pos[1] = '\0';
 841                 util_strlcpy(str, &pos[2], sizeof(str));
 842                 dir = opendir(attr);
 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_strlcat(attr, dent->d_name, len);
 852                                 util_strlcat(attr, str, len);
 853                                 if (stat(attr, &stats) == 0) {
 854                                         found = 1;
 855                                         break;
 856                                 }
 857                                 pos[1] = '\0';
 858                         }
 859                         closedir(dir);
 860                 }
 861                 if (!found)
 862                         util_strlcat(attr, str, len);
 863         }
 864
 865         return found;
 866 }
 867
 868 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
 869 {
 870         char *linepos;
 871         char *temp;
 872
 873         linepos = *line;
 874         if (linepos == NULL && linepos[0] == '\0')
 875                 return -1;
 876
 877         /* skip whitespace */
 878         while (isspace(linepos[0]) || linepos[0] == ',')
 879                 linepos++;
 880
 881         /* get the key */
 882         if (linepos[0] == '\0')
 883                 return -1;
 884         *key = linepos;
 885
 886         while (1) {
 887                 linepos++;
 888                 if (linepos[0] == '\0')
 889                         return -1;
 890                 if (isspace(linepos[0]))
 891                         break;
 892                 if (linepos[0] == '=')
 893                         break;
 894                 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
 895                         if (linepos[1] == '=')
 896                                 break;
 897         }
 898
 899         /* remember end of key */
 900         temp = linepos;
 901
 902         /* skip whitespace after key */
 903         while (isspace(linepos[0]))
 904                 linepos++;
 905         if (linepos[0] == '\0')
 906                 return -1;
 907
 908         /* get operation type */
 909         if (linepos[0] == '=' && linepos[1] == '=') {
 910                 *op = OP_MATCH;
 911                 linepos += 2;
 912         } else if (linepos[0] == '!' && linepos[1] == '=') {
 913                 *op = OP_NOMATCH;
 914                 linepos += 2;
 915         } else if (linepos[0] == '+' && linepos[1] == '=') {
 916                 *op = OP_ADD;
 917                 linepos += 2;
 918         } else if (linepos[0] == '=') {
 919                 *op = OP_ASSIGN;
 920                 linepos++;
 921         } else if (linepos[0] == ':' && linepos[1] == '=') {
 922                 *op = OP_ASSIGN_FINAL;
 923                 linepos += 2;
 924         } else
 925                 return -1;
 926
 927         /* terminate key */
 928         temp[0] = '\0';
 929
 930         /* skip whitespace after operator */
 931         while (isspace(linepos[0]))
 932                 linepos++;
 933         if (linepos[0] == '\0')
 934                 return -1;
 935
 936         /* get the value */
 937         if (linepos[0] == '"')
 938                 linepos++;
 939         else
 940                 return -1;
 941         *value = linepos;
 942
 943         /* terminate */
 944         temp = strchr(linepos, '"');
 945         if (!temp)
 946                 return -1;
 947         temp[0] = '\0';
 948         temp++;
 949         dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
 950
 951         /* move line to next key */
 952         *line = temp;
 953         return 0;
 954 }
 955
 956 /* extract possible KEY{attr} */
 957 static char *get_key_attribute(struct udev *udev, char *str)
 958 {
 959         char *pos;
 960         char *attr;
 961
 962         attr = strchr(str, '{');
 963         if (attr != NULL) {
 964                 attr++;
 965                 pos = strchr(attr, '}');
 966                 if (pos == NULL) {
 967                         err(udev, "missing closing brace for format\n");
 968                         return NULL;
 969                 }
 970                 pos[0] = '\0';
 971                 dbg(udev, "attribute='%s'\n", attr);
 972                 return attr;
 973         }
 974         return NULL;
 975 }
 976
 977 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
 978                         enum operation_type op,
 979                         const char *value, const void *data)
 980 {
 981         struct token *token = &rule_tmp->token[rule_tmp->token_cur];
 982         const char *attr = data;
 983         enum string_glob_type glob;
 984
 985         memset(token, 0x00, sizeof(struct token));
 986
 987         switch (type) {
 988         case TK_M_ACTION:
 989         case TK_M_DEVPATH:
 990         case TK_M_KERNEL:
 991         case TK_M_SUBSYSTEM:
 992         case TK_M_DRIVER:
 993         case TK_M_WAITFOR:
 994         case TK_M_DEVLINK:
 995         case TK_M_NAME:
 996         case TK_M_KERNELS:
 997         case TK_M_SUBSYSTEMS:
 998         case TK_M_DRIVERS:
 999         case TK_M_PROGRAM:
1000         case TK_M_IMPORT_FILE:
1001         case TK_M_IMPORT_PROG:
1002         case TK_M_IMPORT_PARENT:
1003         case TK_M_RESULT:
1004         case TK_A_OWNER:
1005         case TK_A_GROUP:
1006         case TK_A_MODE:
1007         case TK_A_NAME:
1008         case TK_A_DEVLINK:
1009         case TK_A_GOTO:
1010                 token->key.value_off = add_string(rule_tmp->rules, value);
1011                 break;
1012         case TK_M_ENV:
1013         case TK_M_ATTR:
1014         case TK_M_ATTRS:
1015         case TK_A_ATTR:
1016         case TK_A_ENV:
1017                 token->key.value_off = add_string(rule_tmp->rules, value);
1018                 token->key.attr_off = add_string(rule_tmp->rules, attr);
1019                 break;
1020         case TK_M_TEST:
1021                 token->key.value_off = add_string(rule_tmp->rules, value);
1022                 if (data != NULL)
1023                         token->key.mode = *(mode_t *)data;
1024                 break;
1025         case TK_A_IGNORE_DEVICE:
1026         case TK_A_STRING_ESCAPE_NONE:
1027         case TK_A_STRING_ESCAPE_REPLACE:
1028         case TK_A_IGNORE_REMOVE:
1029         case TK_A_LAST_RULE:
1030                 break;
1031         case TK_A_RUN:
1032                 token->key.value_off = add_string(rule_tmp->rules, value);
1033                 token->key.ignore_error = *(int *)data;
1034                 break;
1035         case TK_A_NUM_FAKE_PART:
1036                 token->key.num_fake_part = *(int *)data;
1037                 break;
1038         case TK_A_DEVLINK_PRIO:
1039                 token->key.devlink_prio = *(int *)data;
1040                 break;
1041         case TK_A_OWNER_ID:
1042                 token->key.uid = *(uid_t *)data;
1043                 break;
1044         case TK_A_GROUP_ID:
1045                 token->key.gid = *(gid_t *)data;
1046                 break;
1047         case TK_A_MODE_ID:
1048                 token->key.mode = *(mode_t *)data;
1049                 break;
1050         case TK_A_EVENT_TIMEOUT:
1051                 token->key.event_timeout = *(int *)data;
1052                 break;
1053         case TK_RULE:
1054         case TK_M_PARENTS_MIN:
1055         case TK_M_PARENTS_MAX:
1056         case TK_M_MAX:
1057         case TK_END:
1058         case TK_UNSET:
1059                 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1060                 return -1;
1061         }
1062
1063         glob = GL_PLAIN;
1064         if (value != NULL) {
1065                 if (type < TK_M_MAX) {
1066                         /* check if we need to split or call fnmatch() while matching rules */
1067                         int has_split;
1068                         int has_glob;
1069
1070                         has_split = (strchr(value, '|') != NULL);
1071                         has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||
1072                                     strchr(value, '[') != NULL || strchr(value, ']') != NULL);
1073                         if (has_split && has_glob) {
1074                                 glob = GL_SPLIT_GLOB;
1075                         } else if (has_split) {
1076                                 glob = GL_SPLIT;
1077                         } else if (has_glob) {
1078                                 if (strcmp(value, "?*") == 0)
1079                                         glob = GL_SOMETHING;
1080                                 else
1081                                         glob = GL_GLOB;
1082                         }
1083                 } else {
1084                         /* check if we need to substitute format strings for matching rules */
1085                         if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1086                                 glob = GL_FORMAT;
1087                 }
1088         }
1089
1090         token->key.type = type;
1091         token->key.op = op;
1092         token->key.glob = glob;
1093         rule_tmp->token_cur++;
1094         if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1095                 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1096                 return -1;
1097         }
1098         return 0;
1099 }
1100
1101 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1102 {
1103         unsigned int i;
1104         unsigned int start = 0;
1105         unsigned int end = rule_tmp->token_cur;
1106
1107         for (i = 0; i < rule_tmp->token_cur; i++) {
1108                 enum token_type next_val = TK_UNSET;
1109                 unsigned int next_idx;
1110                 unsigned int j;
1111
1112                 /* find smallest value */
1113                 for (j = start; j < end; j++) {
1114                         if (rule_tmp->token[j].type == TK_UNSET)
1115                                 continue;
1116                         if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1117                                 next_val = rule_tmp->token[j].type;
1118                                 next_idx = j;
1119                         }
1120                 }
1121
1122                 /* add token and mark done */
1123                 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1124                         return -1;
1125                 rule_tmp->token[next_idx].type = TK_UNSET;
1126
1127                 /* shrink range */
1128                 if (next_idx == start)
1129                         start++;
1130                 if (next_idx+1 == end)
1131                         end--;
1132         }
1133         return 0;
1134 }
1135
1136 static int add_rule(struct udev_rules *rules, char *line,
1137                     const char *filename, unsigned int filename_off, unsigned int lineno)
1138 {
1139         int valid = 0;
1140         char *linepos;
1141         char *attr;
1142         int physdev = 0;
1143         struct rule_tmp rule_tmp;
1144
1145         memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1146         rule_tmp.rules = rules;
1147         rule_tmp.rule.type = TK_RULE;
1148         rule_tmp.rule.rule.filename_off = filename_off;
1149         rule_tmp.rule.rule.filename_line = lineno;
1150
1151         linepos = line;
1152         while (1) {
1153                 char *key;
1154                 char *value;
1155                 enum operation_type op;
1156
1157                 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1158                         break;
1159
1160                 if (strcasecmp(key, "ACTION") == 0) {
1161                         if (op > OP_MATCH_MAX) {
1162                                 err(rules->udev, "invalid ACTION operation\n");
1163                                 goto invalid;
1164                         }
1165                         rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1166                         valid = 1;
1167                         continue;
1168                 }
1169
1170                 if (strcasecmp(key, "DEVPATH") == 0) {
1171                         if (op > OP_MATCH_MAX) {
1172                                 err(rules->udev, "invalid DEVPATH operation\n");
1173                                 goto invalid;
1174                         }
1175                         rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1176                         valid = 1;
1177                         continue;
1178                 }
1179
1180                 if (strcasecmp(key, "KERNEL") == 0) {
1181                         if (op > OP_MATCH_MAX) {
1182                                 err(rules->udev, "invalid KERNEL operation\n");
1183                                 goto invalid;
1184                         }
1185                         rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1186                         valid = 1;
1187                         continue;
1188                 }
1189
1190                 if (strcasecmp(key, "SUBSYSTEM") == 0) {
1191                         if (op > OP_MATCH_MAX) {
1192                                 err(rules->udev, "invalid SUBSYSTEM operation\n");
1193                                 goto invalid;
1194                         }
1195                         /* bus, class, subsystem events should all be the same */
1196                         if (strcmp(value, "subsystem") == 0 ||
1197                             strcmp(value, "bus") == 0 ||
1198                             strcmp(value, "class") == 0) {
1199                                 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1200                                         err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1201                                             "please fix it in %s:%u", value, filename, lineno);
1202                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1203                         } else
1204                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1205                         valid = 1;
1206                         continue;
1207                 }
1208
1209                 if (strcasecmp(key, "DRIVER") == 0) {
1210                         if (op > OP_MATCH_MAX) {
1211                                 err(rules->udev, "invalid DRIVER operation\n");
1212                                 goto invalid;
1213                         }
1214                         rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1215                         valid = 1;
1216                         continue;
1217                 }
1218
1219                 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1220                         attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1221                         if (attr == NULL) {
1222                                 err(rules->udev, "error parsing ATTR attribute\n");
1223                                 goto invalid;
1224                         }
1225                         if (op < OP_MATCH_MAX) {
1226                                 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1227                         } else {
1228                                 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1229                         }
1230                         valid = 1;
1231                         continue;
1232                 }
1233
1234                 if (strcasecmp(key, "KERNELS") == 0 ||
1235                     strcasecmp(key, "ID") == 0) {
1236                         if (op > OP_MATCH_MAX) {
1237                                 err(rules->udev, "invalid KERNELS operation\n");
1238                                 goto invalid;
1239                         }
1240                         rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1241                         valid = 1;
1242                         continue;
1243                 }
1244
1245                 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
1246                     strcasecmp(key, "BUS") == 0) {
1247                         if (op > OP_MATCH_MAX) {
1248                                 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1249                                 goto invalid;
1250                         }
1251                         rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1252                         valid = 1;
1253                         continue;
1254                 }
1255
1256                 if (strcasecmp(key, "DRIVERS") == 0) {
1257                         if (op > OP_MATCH_MAX) {
1258                                 err(rules->udev, "invalid DRIVERS operation\n");
1259                                 goto invalid;
1260                         }
1261                         rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1262                         valid = 1;
1263                         continue;
1264                 }
1265
1266                 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1267                     strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1268                         if (op > OP_MATCH_MAX) {
1269                                 err(rules->udev, "invalid ATTRS operation\n");
1270                                 goto invalid;
1271                         }
1272                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1273                         if (attr == NULL) {
1274                                 err(rules->udev, "error parsing ATTRS attribute\n");
1275                                 goto invalid;
1276                         }
1277                         if (strncmp(attr, "device/", 7) == 0)
1278                                 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1279                                     "please fix it in %s:%u", filename, lineno);
1280                         else if (strstr(attr, "../") != NULL)
1281                                 err(rules->udev, "do not reference parent sysfs directories directly, "
1282                                     "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1283                         rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1284                         valid = 1;
1285                         continue;
1286                 }
1287
1288                 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1289                         attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1290                         if (attr == NULL) {
1291                                 err(rules->udev, "error parsing ENV attribute\n");
1292                                 goto invalid;
1293                         }
1294                         if (strncmp(attr, "PHYSDEV", 7) == 0)
1295                                 physdev = 1;
1296                         if (op < OP_MATCH_MAX) {
1297                                 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1298                                         goto invalid;
1299                         } else {
1300                                 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1301                                         goto invalid;
1302                         }
1303                         valid = 1;
1304                         continue;
1305                 }
1306
1307                 if (strcasecmp(key, "PROGRAM") == 0) {
1308                         rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1309                         valid = 1;
1310                         continue;
1311                 }
1312
1313                 if (strcasecmp(key, "RESULT") == 0) {
1314                         if (op > OP_MATCH_MAX) {
1315                                 err(rules->udev, "invalid RESULT operation\n");
1316                                 goto invalid;
1317                         }
1318                         rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1319                         valid = 1;
1320                         continue;
1321                 }
1322
1323                 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1324                         attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1325                         if (attr != NULL && strstr(attr, "program")) {
1326                                 dbg(rules->udev, "IMPORT will be executed\n");
1327                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1328                                 valid = 1;
1329                         } else if (attr != NULL && strstr(attr, "file")) {
1330                                 dbg(rules->udev, "IMPORT will be included as file\n");
1331                                 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1332                                 valid = 1;
1333                         } else if (attr != NULL && strstr(attr, "parent")) {
1334                                 dbg(rules->udev, "IMPORT will include the parent values\n");
1335                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1336                                 valid = 1;
1337                         } else {
1338                                 /* figure it out if it is executable */
1339                                 char file[UTIL_PATH_SIZE];
1340                                 char *pos;
1341                                 struct stat statbuf;
1342
1343                                 util_strlcpy(file, value, sizeof(file));
1344                                 pos = strchr(file, ' ');
1345                                 if (pos)
1346                                         pos[0] = '\0';
1347
1348                                 /* allow programs in /lib/udev called without the path */
1349                                 if (strchr(file, '/') == NULL) {
1350                                         util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));
1351                                         util_strlcat(file, value, sizeof(file));
1352                                         pos = strchr(file, ' ');
1353                                         if (pos)
1354                                                 pos[0] = '\0';
1355                                 }
1356
1357                                 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1358                                 if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
1359                                         dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1360                                         rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1361                                         valid = 1;
1362                                 } else {
1363                                         dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1364                                         rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1365                                         valid = 1;
1366                                 }
1367                         }
1368                         continue;
1369                 }
1370
1371                 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1372                         mode_t mode = 0;
1373
1374                         if (op > OP_MATCH_MAX) {
1375                                 err(rules->udev, "invalid TEST operation\n");
1376                                 goto invalid;
1377                         }
1378                         attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1379                         if (attr != NULL) {
1380                                 mode = strtol(attr, NULL, 8);
1381                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1382                         } else {
1383                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1384                         }
1385                         valid = 1;
1386                         continue;
1387                 }
1388
1389                 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1390                         int flag = 0;
1391
1392                         attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1393                         if (attr != NULL && strstr(attr, "ignore_error"))
1394                                 flag = 1;
1395                         rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1396                         valid = 1;
1397                         continue;
1398                 }
1399
1400                 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1401                         rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1402                         valid = 1;
1403                         continue;
1404                 }
1405
1406                 if (strcasecmp(key, "LABEL") == 0) {
1407                         rule_tmp.rule.rule.label_off = add_string(rules, value);
1408                         valid = 1;
1409                         continue;
1410                 }
1411
1412                 if (strcasecmp(key, "GOTO") == 0) {
1413                         rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1414                         valid = 1;
1415                         continue;
1416                 }
1417
1418                 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1419                         if (op < OP_MATCH_MAX) {
1420                                 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1421                         } else {
1422                                 if (value[0] == '\0')
1423                                         dbg(rules->udev, "name empty, node creation suppressed\n");
1424                                 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1425                                 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1426                                 if (attr != NULL) {
1427                                         if (strstr(attr, "all_partitions") != NULL) {
1428                                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1429
1430                                                 dbg(rules->udev, "creation of partition nodes requested\n");
1431                                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1432                                         }
1433                                         if (strstr(attr, "ignore_remove") != NULL) {
1434                                                 dbg(rules->udev, "remove event should be ignored\n");
1435                                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1436                                         }
1437                                 }
1438                         }
1439                         rule_tmp.rule.rule.flags = 1;
1440                         continue;
1441                 }
1442
1443                 if (strcasecmp(key, "SYMLINK") == 0) {
1444                         if (op < OP_MATCH_MAX)
1445                                 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1446                         else
1447                                 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1448                         rule_tmp.rule.rule.flags = 1;
1449                         valid = 1;
1450                         continue;
1451                 }
1452
1453                 if (strcasecmp(key, "OWNER") == 0) {
1454                         uid_t uid;
1455                         char *endptr;
1456
1457                         uid = strtoul(value, &endptr, 10);
1458                         if (endptr[0] == '\0') {
1459                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1460                         } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1461                                 uid = add_uid(rules, value);
1462                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1463                         } else {
1464                                 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1465                         }
1466                         rule_tmp.rule.rule.flags = 1;
1467                         valid = 1;
1468                         continue;
1469                 }
1470
1471                 if (strcasecmp(key, "GROUP") == 0) {
1472                         gid_t gid;
1473                         char *endptr;
1474
1475                         gid = strtoul(value, &endptr, 10);
1476                         if (endptr[0] == '\0') {
1477                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1478                         } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1479                                 gid = add_gid(rules, value);
1480                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1481                         } else {
1482                                 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1483                         }
1484                         rule_tmp.rule.rule.flags = 1;
1485                         valid = 1;
1486                         continue;
1487                 }
1488
1489                 if (strcasecmp(key, "MODE") == 0) {
1490                         mode_t mode;
1491                         char *endptr;
1492
1493                         mode = strtol(value, &endptr, 8);
1494                         if (endptr[0] == '\0')
1495                                 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1496                         else
1497                                 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1498                         rule_tmp.rule.rule.flags = 1;
1499                         valid = 1;
1500                         continue;
1501                 }
1502
1503                 if (strcasecmp(key, "OPTIONS") == 0) {
1504                         const char *pos;
1505
1506                         if (strstr(value, "last_rule") != NULL) {
1507                                 dbg(rules->udev, "last rule to be applied\n");
1508                                 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1509                         }
1510                         if (strstr(value, "ignore_device") != NULL) {
1511                                 dbg(rules->udev, "device should be ignored\n");
1512                                 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1513                         }
1514                         if (strstr(value, "ignore_remove") != NULL) {
1515                                 dbg(rules->udev, "remove event should be ignored\n");
1516                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1517                         }
1518                         pos = strstr(value, "link_priority=");
1519                         if (pos != NULL) {
1520                                 int prio = atoi(&pos[strlen("link_priority=")]);
1521
1522                                 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1523                                 dbg(rules->udev, "link priority=%i\n", prio);
1524                         }
1525                         pos = strstr(value, "event_timeout=");
1526                         if (pos != NULL) {
1527                                 int tout = atoi(&pos[strlen("event_timeout=")]);
1528
1529                                 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1530                                 dbg(rules->udev, "event timout=%i\n", tout);
1531                         }
1532                         pos = strstr(value, "string_escape=");
1533                         if (pos != NULL) {
1534                                 pos = &pos[strlen("string_escape=")];
1535                                 if (strncmp(pos, "none", strlen("none")) == 0)
1536                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1537                                 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1538                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1539                         }
1540                         if (strstr(value, "all_partitions") != NULL) {
1541                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1542
1543                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1544                                 dbg(rules->udev, "creation of partition nodes requested\n");
1545                         }
1546                         valid = 1;
1547                         continue;
1548                 }
1549                 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1550         }
1551
1552         if (physdev)
1553                 err(rules->udev, "PHYSDEV* values are deprecated and not available on recent kernels, \n"
1554                     "please fix it in %s:%u", filename, lineno);
1555
1556         /* skip line if not any valid key was found */
1557         if (!valid)
1558                 goto invalid;
1559
1560         /* add rule token */
1561         rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1562         if (add_token(rules, &rule_tmp.rule) != 0)
1563                 goto invalid;
1564
1565         /* add tokens to list, sorted by type */
1566         if (sort_token(rules, &rule_tmp) != 0)
1567                 goto invalid;
1568
1569         return 0;
1570 invalid:
1571         err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1572         return -1;
1573 }
1574
1575 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1576 {
1577         FILE *f;
1578         unsigned int first_token;
1579         char line[UTIL_LINE_SIZE];
1580         int line_nr = 0;
1581         unsigned int i;
1582
1583         info(rules->udev, "reading '%s' as rules file\n", filename);
1584
1585         f = fopen(filename, "r");
1586         if (f == NULL)
1587                 return -1;
1588
1589         first_token = rules->token_cur;
1590
1591         while(fgets(line, sizeof(line), f) != NULL) {
1592                 char *key;
1593                 size_t len;
1594
1595                 /* skip whitespace */
1596                 line_nr++;
1597                 key = line;
1598                 while (isspace(key[0]))
1599                         key++;
1600
1601                 /* comment */
1602                 if (key[0] == '#')
1603                         continue;
1604
1605                 len = strlen(line);
1606                 if (len < 3)
1607                         continue;
1608
1609                 /* continue reading if backslash+newline is found */
1610                 while (line[len-2] == '\\') {
1611                         if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1612                                 break;
1613                         line_nr++;
1614                         len = strlen(line);
1615                 }
1616
1617                 if (len+1 >= sizeof(line)) {
1618                         err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1619                         continue;
1620                 }
1621                 add_rule(rules, key, filename, filename_off, line_nr);
1622         }
1623         fclose(f);
1624
1625         /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1626         for (i = first_token+1; i < rules->token_cur; i++) {
1627                 if (rules->tokens[i].type == TK_A_GOTO) {
1628                         char *label = &rules->buf[rules->tokens[i].key.value_off];
1629                         unsigned int j;
1630
1631                         for (j = i+1; j < rules->token_cur; j++) {
1632                                 if (rules->tokens[j].type != TK_RULE)
1633                                         continue;
1634                                 if (rules->tokens[j].rule.label_off == 0)
1635                                         continue;
1636                                 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1637                                         continue;
1638                                 rules->tokens[i].key.rule_goto = j;
1639                         }
1640                         if (rules->tokens[i].key.rule_goto == 0)
1641                                 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1642                 }
1643         }
1644         return 0;
1645 }
1646
1647 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1648 {
1649         DIR *dir;
1650         char filename[UTIL_PATH_SIZE];
1651
1652         dbg(udev, "open directory '%s'\n", dirname);
1653         dir = opendir(dirname);
1654         if (dir == NULL) {
1655                 err(udev, "unable to open '%s': %m\n", dirname);
1656                 return -1;
1657         }
1658
1659         while (1) {
1660                 struct dirent *dent;
1661
1662                 dent = readdir(dir);
1663                 if (dent == NULL || dent->d_name[0] == '\0')
1664                         break;
1665
1666                 if (dent->d_name[0] == '.')
1667                         continue;
1668
1669                 /* look for file matching with specified suffix */
1670                 if (suffix != NULL) {
1671                         const char *ext;
1672
1673                         ext = strrchr(dent->d_name, '.');
1674                         if (ext == NULL)
1675                                 continue;
1676                         if (strcmp(ext, suffix) != 0)
1677                                 continue;
1678                 }
1679                 dbg(udev, "put file '%s/%s' into list\n", dirname, dent->d_name);
1680
1681                 snprintf(filename, sizeof(filename), "%s/%s", dirname, dent->d_name);
1682                 filename[sizeof(filename)-1] = '\0';
1683                 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1684         }
1685
1686         closedir(dir);
1687         return 0;
1688 }
1689
1690 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1691 {
1692         struct udev_rules *rules;
1693         struct stat statbuf;
1694         struct udev_list_node file_list;
1695         struct udev_list_entry *file_loop, *file_tmp;
1696         struct token end_token;
1697
1698         rules = malloc(sizeof(struct udev_rules));
1699         if (rules == NULL)
1700                 return NULL;
1701         memset(rules, 0x00, sizeof(struct udev_rules));
1702         rules->udev = udev;
1703         rules->resolve_names = resolve_names;
1704         udev_list_init(&file_list);
1705
1706         /* init token array and string buffer */
1707         rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1708         if (rules->tokens == NULL)
1709                 return NULL;
1710         rules->token_max = PREALLOC_TOKEN;
1711
1712         rules->buf = malloc(PREALLOC_STRBUF);
1713         if (rules->buf == NULL)
1714                 return NULL;
1715         rules->buf_max = PREALLOC_STRBUF;
1716         /* offset 0 is always '\0' */
1717         rules->buf[0] = '\0';
1718         rules->buf_cur = 1;
1719         dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1720             rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1721
1722         rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1723         if (rules->trie_nodes == NULL)
1724                 return NULL;
1725         rules->trie_nodes_max = PREALLOC_TRIE;
1726         /* offset 0 is the trie root */
1727         memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1728         rules->trie_nodes_cur = 1;
1729
1730         if (udev_get_rules_path(udev) != NULL) {
1731                 /* custom rules location for testing */
1732                 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1733         } else {
1734                 char filename[PATH_MAX];
1735                 struct udev_list_node sort_list;
1736                 struct udev_list_entry *sort_loop, *sort_tmp;
1737
1738                 /* read user/custom rules */
1739                 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1740
1741                 /* read dynamic/temporary rules */
1742                 util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
1743                 util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
1744                 if (stat(filename, &statbuf) != 0) {
1745                         util_create_path(udev, filename);
1746                         udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1747                         mkdir(filename, 0755);
1748                         udev_selinux_resetfscreatecon(udev);
1749                 }
1750                 udev_list_init(&sort_list);
1751                 add_matching_files(udev, &sort_list, filename, ".rules");
1752
1753                 /* read default rules */
1754                 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1755
1756                 /* sort all rules files by basename into list of files */
1757                 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1758                         const char *sort_name = udev_list_entry_get_name(sort_loop);
1759                         const char *sort_base = strrchr(sort_name, '/');
1760
1761                         if (sort_base == NULL)
1762                                 continue;
1763                         /* sort entry into existing list */
1764                         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1765                                 const char *file_name = udev_list_entry_get_name(file_loop);
1766                                 const char *file_base = strrchr(file_name, '/');
1767
1768                                 if (file_base == NULL)
1769                                         continue;
1770                                 if (strcmp(file_base, sort_base) == 0) {
1771                                         info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1772                                              file_name, sort_name);
1773                                         udev_list_entry_delete(sort_loop);
1774                                         sort_loop = NULL;
1775                                         break;
1776                                 }
1777                                 if (strcmp(file_base, sort_base) > 0) {
1778                                         /* found later file, insert before */
1779                                         udev_list_entry_remove(sort_loop);
1780                                         udev_list_entry_insert_before(sort_loop, file_loop);
1781                                         sort_loop = NULL;
1782                                         break;
1783                                 }
1784                         }
1785                         /* current file already handled */
1786                         if (sort_loop == NULL)
1787                                 continue;
1788                         /* no later file, append to end of list */
1789                         udev_list_entry_remove(sort_loop);
1790                         udev_list_entry_append(sort_loop, &file_list);
1791                 }
1792         }
1793
1794         /* add all filenames to the string buffer */
1795         udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1796                 const char *filename = udev_list_entry_get_name(file_loop);
1797                 unsigned int filename_off;
1798
1799                 filename_off = add_string(rules, filename);
1800                 /* the offset in the rule is limited to unsigned short */
1801                 if (filename_off < USHRT_MAX)
1802                         udev_list_entry_set_flag(file_loop, filename_off);
1803         }
1804
1805         /* parse list of files */
1806         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1807                 const char *filename = udev_list_entry_get_name(file_loop);
1808                 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1809
1810                 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1811                         parse_file(rules, filename, filename_off);
1812                 else
1813                         info(udev, "can not read '%s'\n", filename);
1814                 udev_list_entry_delete(file_loop);
1815         }
1816
1817         memset(&end_token, 0x00, sizeof(struct token));
1818         end_token.type = TK_END;
1819         add_token(rules, &end_token);
1820
1821         /* shrink allocated token and string buffer */
1822         if (rules->token_cur < rules->token_max) {
1823                 struct token *tokens;
1824
1825                 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1826                 if (tokens != NULL || rules->token_cur == 0) {
1827                         rules->tokens = tokens;
1828                         rules->token_max = rules->token_cur;
1829                 }
1830         }
1831         if (rules->buf_cur < rules->buf_max) {
1832                 char *buf;
1833
1834                 buf = realloc(rules->buf, rules->buf_cur);
1835                 if (buf != NULL || rules->buf_cur == 0) {
1836                         rules->buf = buf;
1837                         rules->buf_max = rules->buf_cur;
1838                 }
1839         }
1840         info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1841              rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1842         info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1843              rules->trie_nodes_cur * sizeof(struct trie_node),
1844              rules->trie_nodes_cur, sizeof(struct trie_node));
1845
1846         /* cleanup trie */
1847         free(rules->trie_nodes);
1848         rules->trie_nodes = NULL;
1849         rules->trie_nodes_cur = 0;
1850         rules->trie_nodes_max = 0;
1851
1852         /* cleanup uid/gid cache */
1853         free(rules->uids);
1854         rules->uids = NULL;
1855         rules->uids_cur = 0;
1856         rules->uids_max = 0;
1857         free(rules->gids);
1858         rules->gids = NULL;
1859         rules->gids_cur = 0;
1860         rules->gids_max = 0;
1861
1862         dump_rules(rules);
1863         return rules;
1864 }
1865
1866 void udev_rules_unref(struct udev_rules *rules)
1867 {
1868         if (rules == NULL)
1869                 return;
1870         free(rules->tokens);
1871         free(rules->buf);
1872         free(rules->trie_nodes);
1873         free(rules->uids);
1874         free(rules->gids);
1875         free(rules);
1876 }
1877
1878 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1879 {
1880         char *key_value = &rules->buf[token->key.value_off];
1881         char *pos;
1882         int match = 0;
1883
1884         if (val == NULL)
1885                 val = "";
1886
1887         switch (token->key.glob) {
1888         case GL_PLAIN:
1889                 match = (strcmp(key_value, val) == 0);
1890                 break;
1891         case GL_GLOB:
1892                 match = (fnmatch(key_value, val, 0) == 0);
1893                 break;
1894         case GL_SPLIT:
1895                 {
1896                         const char *split;
1897                         size_t len;
1898
1899                         split = &rules->buf[token->key.value_off];
1900                         len = strlen(val);
1901                         while (1) {
1902                                 const char *next;
1903
1904                                 next = strchr(split, '|');
1905                                 if (next != NULL) {
1906                                         size_t matchlen = (size_t)(next - split);
1907
1908                                         match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1909                                         if (match)
1910                                                 break;
1911                                 } else {
1912                                         match = (strcmp(split, val) == 0);
1913                                         break;
1914                                 }
1915                                 split = &next[1];
1916                         }
1917                         break;
1918                 }
1919         case GL_SPLIT_GLOB:
1920                 {
1921                         char value[UTIL_PATH_SIZE];
1922
1923                         util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value));
1924                         key_value = value;
1925                         while (key_value != NULL) {
1926                                 pos = strchr(key_value, '|');
1927                                 if (pos != NULL) {
1928                                         pos[0] = '\0';
1929                                         pos = &pos[1];
1930                                 }
1931                                 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1932                                 match = (fnmatch(key_value, val, 0) == 0);
1933                                 if (match)
1934                                         break;
1935                                 key_value = pos;
1936                         }
1937                         break;
1938                 }
1939         case GL_SOMETHING:
1940                 match = (val[0] != '\0');
1941                 break;
1942         case GL_FORMAT:
1943         case GL_UNSET:
1944                 return -1;
1945         }
1946
1947         if (match && (token->key.op == OP_MATCH)) {
1948                 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1949                 return 0;
1950         }
1951         if (!match && (token->key.op == OP_NOMATCH)) {
1952                 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1953                 return 0;
1954         }
1955         dbg(rules->udev, "%s is not true\n", token_str(token->type));
1956         return -1;
1957 }
1958
1959 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1960 {
1961         const char *key_name = &rules->buf[cur->key.attr_off];
1962         const char *key_value = &rules->buf[cur->key.value_off];
1963         char value[UTIL_NAME_SIZE];
1964         size_t len;
1965
1966         value[0] = '\0';
1967         if (key_name[0] == '[') {
1968                 char attr[UTIL_PATH_SIZE];
1969
1970                 util_strlcpy(attr, key_name, sizeof(attr));
1971                 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
1972         }
1973         if (value[0] == '\0') {
1974                 const char *val;
1975
1976                 val = udev_device_get_sysattr_value(dev, key_name);
1977                 if (val == NULL)
1978                         return -1;
1979                 util_strlcpy(value, val, sizeof(value));
1980         }
1981
1982         /* strip trailing whitespace of value, if not asked to match for it */
1983         len = strlen(key_value);
1984         if (len > 0 && !isspace(key_value[len-1])) {
1985                 len = strlen(value);
1986                 while (len > 0 && isspace(value[--len]))
1987                         value[len] = '\0';
1988                 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1989         }
1990         return match_key(rules, cur, value);
1991 }
1992
1993 enum escape_type {
1994         ESCAPE_UNSET,
1995         ESCAPE_NONE,
1996         ESCAPE_REPLACE,
1997 };
1998
1999 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
2000 {
2001         struct token *cur;
2002         struct token *rule;
2003         enum escape_type esc = ESCAPE_UNSET;
2004         int can_set_name;
2005
2006         if (rules->tokens == NULL)
2007                 return -1;
2008
2009         can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
2010                          strcmp(udev_device_get_action(event->dev), "change") == 0) &&
2011                         (major(udev_device_get_devnum(event->dev)) > 0 ||
2012                          strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
2013
2014         /* loop through token list, match, run actions or forward to next rule */
2015         cur = &rules->tokens[0];
2016         rule = cur;
2017         while (1) {
2018                 dump_token(rules, cur);
2019                 switch (cur->type) {
2020                 case TK_RULE:
2021                         /* current rule */
2022                         rule = cur;
2023                         /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2024                         if (!can_set_name && rule->rule.flags)
2025                                 ;//goto nomatch;
2026                         esc = ESCAPE_UNSET;
2027                         break;
2028                 case TK_M_ACTION:
2029                         if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2030                                 goto nomatch;
2031                         break;
2032                 case TK_M_DEVPATH:
2033                         if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2034                                 goto nomatch;
2035                         break;
2036                 case TK_M_KERNEL:
2037                         if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2038                                 goto nomatch;
2039                         break;
2040                 case TK_M_DEVLINK:
2041                         {
2042                                 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2043                                 struct udev_list_entry *list_entry;
2044                                 int match = 0;
2045
2046                                 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2047                                         const char *devlink;
2048
2049                                         devlink =  &udev_list_entry_get_name(list_entry)[devlen];
2050                                         if (match_key(rules, cur, devlink) == 0) {
2051                                                 match = 1;
2052                                                 break;
2053                                         }
2054                                 }
2055                                 if (!match)
2056                                         goto nomatch;
2057                                 break;
2058                         }
2059                 case TK_M_NAME:
2060                         if (match_key(rules, cur, event->name) != 0)
2061                                 goto nomatch;
2062                         break;
2063                 case TK_M_ENV:
2064                         {
2065                                 struct udev_list_entry *list_entry;
2066                                 const char *key_name = &rules->buf[cur->key.attr_off];
2067                                 const char *value;
2068
2069                                 list_entry = udev_device_get_properties_list_entry(event->dev);
2070                                 list_entry = udev_list_entry_get_by_name(list_entry, key_name);
2071                                 value = udev_list_entry_get_value(list_entry);
2072                                 if (value == NULL) {
2073                                         dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2074                                         value = "";
2075                                 }
2076                                 if (match_key(rules, cur, value))
2077                                         goto nomatch;
2078                                 break;
2079                         }
2080                 case TK_M_SUBSYSTEM:
2081                         if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2082                                 goto nomatch;
2083                         break;
2084                 case TK_M_DRIVER:
2085                         if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2086                                 goto nomatch;
2087                         break;
2088                 case TK_M_WAITFOR:
2089                         {
2090                                 char filename[UTIL_PATH_SIZE];
2091                                 int found;
2092
2093                                 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2094                                 udev_event_apply_format(event, filename, sizeof(filename));
2095                                 found = (wait_for_file(event->dev, filename, 10) == 0);
2096                                 if (!found && (cur->key.op != OP_NOMATCH))
2097                                         goto nomatch;
2098                                 break;
2099                         }
2100                 case TK_M_ATTR:
2101                         if (match_attr(rules, event->dev, event, cur) != 0)
2102                                 goto nomatch;
2103                         break;
2104                 case TK_M_KERNELS:
2105                 case TK_M_SUBSYSTEMS:
2106                 case TK_M_DRIVERS:
2107                 case TK_M_ATTRS:
2108                         {
2109                                 struct token *next;
2110
2111                                 /* get whole sequence of parent matches */
2112                                 next = cur;
2113                                 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2114                                         next++;
2115
2116                                 /* loop over parents */
2117                                 event->dev_parent = event->dev;
2118                                 while (1) {
2119                                         struct token *key;
2120
2121                                         dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2122                                         /* loop over sequence of parent match keys */
2123                                         for (key = cur; key < next; key++ ) {
2124                                                 dump_token(rules, key);
2125                                                 switch(key->type) {
2126                                                 case TK_M_KERNELS:
2127                                                         if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2128                                                                 goto try_parent;
2129                                                         break;
2130                                                 case TK_M_SUBSYSTEMS:
2131                                                         if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2132                                                                 goto try_parent;
2133                                                         break;
2134                                                 case TK_M_DRIVERS:
2135                                                         if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2136                                                                 goto try_parent;
2137                                                         break;
2138                                                 case TK_M_ATTRS:
2139                                                         if (match_attr(rules, event->dev_parent, event, key) != 0)
2140                                                                 goto try_parent;
2141                                                         break;
2142                                                 default:
2143                                                         goto nomatch;
2144                                                 }
2145                                                 dbg(event->udev, "parent key matched\n");
2146                                         }
2147                                         dbg(event->udev, "all parent keys matched\n");
2148                                         /* all keys matched */
2149                                         break;
2150
2151                                 try_parent:
2152                                         event->dev_parent = udev_device_get_parent(event->dev_parent);
2153                                         if (event->dev_parent == NULL)
2154                                                 goto nomatch;
2155                                 }
2156                                 /* move behind our sequence of parent match keys */
2157                                 cur = next;
2158                                 continue;
2159                         }
2160                 case TK_M_TEST:
2161                         {
2162                                 char filename[UTIL_PATH_SIZE];
2163                                 struct stat statbuf;
2164                                 int match;
2165
2166                                 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2167                                 udev_event_apply_format(event, filename, sizeof(filename));
2168                                 if (util_resolve_subsys_kernel(event->udev, NULL, filename, sizeof(filename), 0) != 0)
2169                                         if (filename[0] != '/') {
2170                                                 char tmp[UTIL_PATH_SIZE];
2171
2172                                                 util_strlcpy(tmp, udev_device_get_syspath(event->dev), sizeof(tmp));
2173                                                 util_strlcat(tmp, "/", sizeof(tmp));
2174                                                 util_strlcat(tmp, filename, sizeof(tmp));
2175                                                 util_strlcpy(filename, tmp, sizeof(filename));
2176                                         }
2177
2178                                 attr_subst_subdir(filename, sizeof(filename));
2179
2180                                 match = (stat(filename, &statbuf) == 0);
2181                                 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2182                                 if (match && cur->key.mode > 0) {
2183                                         match = ((statbuf.st_mode & cur->key.mode) > 0);
2184                                         dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2185                                             match ? "matches" : "does not match", cur->key.mode);
2186                                 }
2187                                 if (match && cur->key.op == OP_NOMATCH)
2188                                         goto nomatch;
2189                                 if (!match && cur->key.op == OP_MATCH)
2190                                         goto nomatch;
2191                                 break;
2192                         }
2193                 case TK_M_PROGRAM:
2194                         {
2195                                 char program[UTIL_PATH_SIZE];
2196                                 char **envp;
2197                                 char result[UTIL_PATH_SIZE];
2198
2199                                 free(event->program_result);
2200                                 event->program_result = NULL;
2201                                 util_strlcpy(program, &rules->buf[cur->key.value_off], sizeof(program));
2202                                 udev_event_apply_format(event, program, sizeof(program));
2203                                 envp = udev_device_get_properties_envp(event->dev);
2204                                 info(event->udev, "PROGRAM '%s' %s:%u\n",
2205                                      program,
2206                                      &rules->buf[rule->rule.filename_off],
2207                                      rule->rule.filename_line);
2208                                 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2209                                         if (cur->key.op != OP_NOMATCH)
2210                                                 goto nomatch;
2211                                 } else {
2212                                         int count;
2213
2214                                         util_remove_trailing_chars(result, '\n');
2215                                         if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2216                                                 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2217                                                 if (count > 0)
2218                                                         info(event->udev, "%i character(s) replaced\n" , count);
2219                                         }
2220                                         event->program_result = strdup(result);
2221                                         dbg(event->udev, "storing result '%s'\n", event->program_result);
2222                                         if (cur->key.op == OP_NOMATCH)
2223                                                 goto nomatch;
2224                                 }
2225                                 break;
2226                         }
2227                 case TK_M_IMPORT_FILE:
2228                         {
2229                                 char import[UTIL_PATH_SIZE];
2230
2231                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2232                                 udev_event_apply_format(event, import, sizeof(import));
2233                                 if (import_file_into_properties(event->dev, import) != 0)
2234                                         if (cur->key.op != OP_NOMATCH)
2235                                                 goto nomatch;
2236                                 break;
2237                         }
2238                 case TK_M_IMPORT_PROG:
2239                         {
2240                                 char import[UTIL_PATH_SIZE];
2241
2242                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2243                                 udev_event_apply_format(event, import, sizeof(import));
2244                                 info(event->udev, "IMPORT '%s' %s:%u\n",
2245                                      import,
2246                                      &rules->buf[rule->rule.filename_off],
2247                                      rule->rule.filename_line);
2248                                 if (import_program_into_properties(event->dev, import) != 0)
2249                                         if (cur->key.op != OP_NOMATCH)
2250                                                 goto nomatch;
2251                                 break;
2252                         }
2253                 case TK_M_IMPORT_PARENT:
2254                         {
2255                                 char import[UTIL_PATH_SIZE];
2256
2257                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2258                                 udev_event_apply_format(event, import, sizeof(import));
2259                                 if (import_parent_into_properties(event->dev, import) != 0)
2260                                         if (cur->key.op != OP_NOMATCH)
2261                                                 goto nomatch;
2262                                 break;
2263                         }
2264                 case TK_M_RESULT:
2265                         if (match_key(rules, cur, event->program_result) != 0)
2266                                 goto nomatch;
2267                         break;
2268
2269                 case TK_A_IGNORE_DEVICE:
2270                         event->ignore_device = 1;
2271                         return 0;
2272                         break;
2273                 case TK_A_STRING_ESCAPE_NONE:
2274                         esc = ESCAPE_NONE;
2275                         break;
2276                 case TK_A_STRING_ESCAPE_REPLACE:
2277                         esc = ESCAPE_REPLACE;
2278                         break;
2279                 case TK_A_NUM_FAKE_PART:
2280                         if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2281                                 break;
2282                         if (udev_device_get_sysnum(event->dev) != NULL)
2283                                 break;
2284                         udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2285                         break;
2286                 case TK_A_DEVLINK_PRIO:
2287                         udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2288                         break;
2289                 case TK_A_OWNER:
2290                         {
2291                                 char owner[UTIL_NAME_SIZE];
2292
2293                                 if (event->owner_final)
2294                                         break;
2295                                 if (cur->key.op == OP_ASSIGN_FINAL)
2296                                         event->owner_final = 1;
2297                                 util_strlcpy(owner,  &rules->buf[cur->key.value_off], sizeof(owner));
2298                                 udev_event_apply_format(event, owner, sizeof(owner));
2299                                 event->uid = util_lookup_user(event->udev, owner);
2300                                 info(event->udev, "OWNER %u %s:%u\n",
2301                                      event->uid,
2302                                      &rules->buf[rule->rule.filename_off],
2303                                      rule->rule.filename_line);
2304                                 break;
2305                         }
2306                 case TK_A_GROUP:
2307                         {
2308                                 char group[UTIL_NAME_SIZE];
2309
2310                                 if (event->group_final)
2311                                         break;
2312                                 if (cur->key.op == OP_ASSIGN_FINAL)
2313                                         event->group_final = 1;
2314                                 util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group));
2315                                 udev_event_apply_format(event, group, sizeof(group));
2316                                 event->gid = util_lookup_group(event->udev, group);
2317                                 info(event->udev, "GROUP %u %s:%u\n",
2318                                      event->gid,
2319                                      &rules->buf[rule->rule.filename_off],
2320                                      rule->rule.filename_line);
2321                                 break;
2322                         }
2323                 case TK_A_MODE:
2324                         {
2325                                 char mode[UTIL_NAME_SIZE];
2326                                 char *endptr;
2327
2328                                 if (event->mode_final)
2329                                         break;
2330                                 if (cur->key.op == OP_ASSIGN_FINAL)
2331                                         event->mode_final = 1;
2332                                 util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode));
2333                                 udev_event_apply_format(event, mode, sizeof(mode));
2334                                 event->mode = strtol(mode, &endptr, 8);
2335                                 if (endptr[0] != '\0') {
2336                                         err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2337                                         event->mode = 0660;
2338                                 }
2339                                 info(event->udev, "MODE %#o %s:%u\n",
2340                                      event->mode,
2341                                      &rules->buf[rule->rule.filename_off],
2342                                      rule->rule.filename_line);
2343                                 break;
2344                         }
2345                 case TK_A_OWNER_ID:
2346                         if (event->owner_final)
2347                                 break;
2348                         if (cur->key.op == OP_ASSIGN_FINAL)
2349                                 event->owner_final = 1;
2350                         event->uid = cur->key.uid;
2351                         info(event->udev, "OWNER %u %s:%u\n",
2352                              event->uid,
2353                              &rules->buf[rule->rule.filename_off],
2354                              rule->rule.filename_line);
2355                         break;
2356                 case TK_A_GROUP_ID:
2357                         if (event->group_final)
2358                                 break;
2359                         if (cur->key.op == OP_ASSIGN_FINAL)
2360                                 event->group_final = 1;
2361                         event->gid = cur->key.gid;
2362                         info(event->udev, "GROUP %u %s:%u\n",
2363                              event->gid,
2364                              &rules->buf[rule->rule.filename_off],
2365                              rule->rule.filename_line);
2366                         break;
2367                 case TK_A_MODE_ID:
2368                         if (event->mode_final)
2369                                 break;
2370                         if (cur->key.op == OP_ASSIGN_FINAL)
2371                                 event->mode_final = 1;
2372                         event->mode = cur->key.mode;
2373                         info(event->udev, "MODE %#o %s:%u\n",
2374                              event->mode,
2375                              &rules->buf[rule->rule.filename_off],
2376                              rule->rule.filename_line);
2377                         break;
2378                 case TK_A_ENV:
2379                         {
2380                                 const char *name = &rules->buf[cur->key.attr_off];
2381                                 char *value = &rules->buf[cur->key.value_off];
2382
2383                                 if (value[0] != '\0') {
2384                                         char temp_value[UTIL_NAME_SIZE];
2385                                         struct udev_list_entry *entry;
2386
2387                                         util_strlcpy(temp_value, value, sizeof(temp_value));
2388                                         udev_event_apply_format(event, temp_value, sizeof(temp_value));
2389                                         entry = udev_device_add_property(event->dev, name, temp_value);
2390                                         /* store in db */
2391                                         udev_list_entry_set_flag(entry, 1);
2392                                 } else {
2393                                         udev_device_add_property(event->dev, name, NULL);
2394                                 }
2395                                 break;
2396                         }
2397                 case TK_A_NAME:
2398                         {
2399                                 const char *name  = &rules->buf[cur->key.value_off];
2400                                 char name_str[UTIL_PATH_SIZE];
2401                                 int count;
2402
2403                                 if (event->name_final)
2404                                         break;
2405                                 if (cur->key.op == OP_ASSIGN_FINAL)
2406                                         event->name_final = 1;
2407                                 if (name[0] == '\0') {
2408                                         free(event->name);
2409                                         event->name = NULL;
2410                                         break;
2411                                 }
2412                                 util_strlcpy(name_str, name, sizeof(name_str));
2413                                 udev_event_apply_format(event, name_str, sizeof(name_str));
2414                                 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2415                                         count = udev_util_replace_chars(name_str, "/");
2416                                         if (count > 0)
2417                                                 info(event->udev, "%i character(s) replaced\n", count);
2418                                         free(event->name);
2419                                         event->name = strdup(name_str);
2420                                         info(event->udev, "NAME '%s' %s:%u\n",
2421                                              event->name,
2422                                              &rules->buf[rule->rule.filename_off],
2423                                              rule->rule.filename_line);
2424                                 }
2425                                 break;
2426                         }
2427                 case TK_A_DEVLINK:
2428                         {
2429                                 char temp[UTIL_PATH_SIZE];
2430                                 char filename[UTIL_PATH_SIZE];
2431                                 char *pos, *next;
2432                                 int count = 0;
2433
2434                                 if (event->devlink_final)
2435                                         break;
2436                                 if (major(udev_device_get_devnum(event->dev)) == 0)
2437                                         break;
2438                                 if (cur->key.op == OP_ASSIGN_FINAL)
2439                                         event->devlink_final = 1;
2440                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2441                                         udev_device_cleanup_devlinks_list(event->dev);
2442
2443                                 /* allow  multiple symlinks separated by spaces */
2444                                 util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));
2445                                 udev_event_apply_format(event, temp, sizeof(temp));
2446                                 if (esc == ESCAPE_UNSET)
2447                                         count = udev_util_replace_chars(temp, "/ ");
2448                                 else if (esc == ESCAPE_REPLACE)
2449                                         count = udev_util_replace_chars(temp, "/");
2450                                 if (count > 0)
2451                                         info(event->udev, "%i character(s) replaced\n" , count);
2452                                 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2453                                 pos = temp;
2454                                 while (isspace(pos[0]))
2455                                         pos++;
2456                                 next = strchr(pos, ' ');
2457                                 while (next) {
2458                                         next[0] = '\0';
2459                                         info(event->udev, "LINK '%s' %s:%u\n",
2460                                              pos,
2461                                              &rules->buf[rule->rule.filename_off],
2462                                              rule->rule.filename_line);
2463                                         util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2464                                         util_strlcat(filename, "/", sizeof(filename));
2465                                         util_strlcat(filename, pos, sizeof(filename));
2466                                         udev_device_add_devlink(event->dev, filename);
2467                                         while (isspace(next[1]))
2468                                                 next++;
2469                                         pos = &next[1];
2470                                         next = strchr(pos, ' ');
2471                                 }
2472                                 if (pos[0] != '\0') {
2473                                         info(event->udev, "LINK '%s' %s:%u\n",
2474                                              pos,
2475                                              &rules->buf[rule->rule.filename_off],
2476                                              rule->rule.filename_line);
2477                                         util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2478                                         util_strlcat(filename, "/", sizeof(filename));
2479                                         util_strlcat(filename, pos, sizeof(filename));
2480                                         udev_device_add_devlink(event->dev, filename);
2481                                 }
2482                         }
2483                         break;
2484                 case TK_A_EVENT_TIMEOUT:
2485                         udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2486                         break;
2487                 case TK_A_IGNORE_REMOVE:
2488                         udev_device_set_ignore_remove(event->dev, 1);
2489                         break;
2490                 case TK_A_ATTR:
2491                         {
2492                                 const char *key_name = &rules->buf[cur->key.attr_off];
2493                                 char attr[UTIL_PATH_SIZE];
2494                                 char value[UTIL_NAME_SIZE];
2495                                 FILE *f;
2496
2497                                 util_strlcpy(attr, key_name, sizeof(attr));
2498                                 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) {
2499                                         util_strlcpy(attr, udev_device_get_syspath(event->dev), sizeof(attr));
2500                                         util_strlcat(attr, "/", sizeof(attr));
2501                                         util_strlcat(attr, key_name, sizeof(attr));
2502                                 }
2503
2504                                 attr_subst_subdir(attr, sizeof(attr));
2505
2506                                 util_strlcpy(value, &rules->buf[cur->key.value_off], sizeof(value));
2507                                 udev_event_apply_format(event, value, sizeof(value));
2508                                 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2509                                      &rules->buf[rule->rule.filename_off],
2510                                      rule->rule.filename_line);
2511                                 f = fopen(attr, "w");
2512                                 if (f != NULL) {
2513                                         if (!event->test)
2514                                                 if (fprintf(f, "%s", value) <= 0)
2515                                                         err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2516                                         fclose(f);
2517                                 } else {
2518                                         err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2519                                 }
2520                                 break;
2521                         }
2522                 case TK_A_RUN:
2523                         {
2524                                 struct udev_list_entry *list_entry;
2525
2526                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2527                                         udev_list_cleanup_entries(event->udev, &event->run_list);
2528                                 info(event->udev, "RUN '%s' %s:%u\n",
2529                                      &rules->buf[cur->key.value_off],
2530                                      &rules->buf[rule->rule.filename_off],
2531                                      rule->rule.filename_line);
2532                                 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2533                                                                  &rules->buf[cur->key.value_off], NULL, 1, 0);
2534                                 if (cur->key.ignore_error)
2535                                         udev_list_entry_set_flag(list_entry, 1);
2536                                 break;
2537                         }
2538                 case TK_A_GOTO:
2539                         cur = &rules->tokens[cur->key.rule_goto];
2540                         continue;
2541                 case TK_A_LAST_RULE:
2542                 case TK_END:
2543                         return 0;
2544
2545                 case TK_M_PARENTS_MIN:
2546                 case TK_M_PARENTS_MAX:
2547                 case TK_M_MAX:
2548                 case TK_UNSET:
2549                         err(rules->udev, "wrong type %u\n", cur->type);
2550                         goto nomatch;
2551                 }
2552
2553                 cur++;
2554                 continue;
2555         nomatch:
2556                 /* fast-forward to next rule */
2557                 cur = rule + rule->rule.token_count;
2558                 dbg(rules->udev, "forward to rule: %u\n",
2559                                  (unsigned int) (cur - rules->tokens));
2560         }
2561 }