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