udev/udev-rules.c

   1 /*
   2  * Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <stddef.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #include <stdio.h>
  22 #include <fcntl.h>
  23 #include <ctype.h>
  24 #include <unistd.h>
  25 #include <errno.h>
  26 #include <dirent.h>
  27 #include <fnmatch.h>
  28
  29 #include "udev.h"
  30
  31 #define PREALLOC_TOKEN                  2048
  32 #define PREALLOC_STRBUF                 32 * 1024
  33
  34 struct uid_gid {
  35         unsigned int name_off;
  36         union {
  37                 uid_t   uid;
  38                 gid_t   gid;
  39         };
  40 };
  41
  42 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
  43 struct udev_rules {
  44         struct udev *udev;
  45         int resolve_names;
  46
  47         /* every key in the rules file becomes a token */
  48         struct token *tokens;
  49         unsigned int token_cur;
  50         unsigned int token_max;
  51
  52         /* all key strings are copied to a single string buffer */
  53         char *buf;
  54         size_t buf_cur;
  55         size_t buf_max;
  56         unsigned int buf_count;
  57
  58         /* during rule parsing, we cache uid/gid lookup results */
  59         struct uid_gid *uids;
  60         unsigned int uids_cur;
  61         unsigned int uids_max;
  62         struct uid_gid *gids;
  63         unsigned int gids_cur;
  64         unsigned int gids_max;
  65 };
  66
  67 enum operation_type {
  68         OP_UNSET,
  69
  70         OP_MATCH,
  71         OP_NOMATCH,
  72         OP_MATCH_MAX,
  73
  74         OP_ADD,
  75         OP_ASSIGN,
  76         OP_ASSIGN_FINAL,
  77 };
  78
  79 enum string_glob_type {
  80         GL_UNSET,
  81         GL_PLAIN,                       /* no special chars */
  82         GL_GLOB,                        /* shell globs ?,*,[] */
  83         GL_SPLIT,                       /* multi-value A|B */
  84         GL_SPLIT_GLOB,                  /* multi-value with glob A*|B* */
  85         GL_SOMETHING,                   /* commonly used "?*" */
  86         GL_FORMAT,
  87 };
  88
  89 /* tokens of a rule are sorted/handled in this order */
  90 enum token_type {
  91         TK_UNSET,
  92         TK_RULE,
  93
  94         TK_M_ACTION,                    /* val */
  95         TK_M_DEVPATH,                   /* val */
  96         TK_M_KERNEL,                    /* val */
  97         TK_M_DEVLINK,                   /* val */
  98         TK_M_NAME,                      /* val */
  99         TK_M_ENV,                       /* val, attr */
 100         TK_M_SUBSYSTEM,                 /* val */
 101         TK_M_DRIVER,                    /* val */
 102         TK_M_WAITFOR,                   /* val */
 103         TK_M_ATTR,                      /* val, attr */
 104
 105         TK_M_PARENTS_MIN,
 106         TK_M_KERNELS,                   /* val */
 107         TK_M_SUBSYSTEMS,                /* val */
 108         TK_M_DRIVERS,                   /* val */
 109         TK_M_ATTRS,                     /* val, attr */
 110         TK_M_PARENTS_MAX,
 111
 112         TK_M_TEST,                      /* val, mode_t */
 113         TK_M_PROGRAM,                   /* val */
 114         TK_M_IMPORT_FILE,               /* val */
 115         TK_M_IMPORT_PROG,               /* val */
 116         TK_M_IMPORT_PARENT,             /* val */
 117         TK_M_RESULT,                    /* val */
 118         TK_M_MAX,
 119
 120         TK_A_IGNORE_DEVICE,
 121         TK_A_STRING_ESCAPE_NONE,
 122         TK_A_STRING_ESCAPE_REPLACE,
 123         TK_A_NUM_FAKE_PART,             /* int */
 124         TK_A_DEVLINK_PRIO,              /* int */
 125         TK_A_OWNER,                     /* val */
 126         TK_A_GROUP,                     /* val */
 127         TK_A_MODE,                      /* val */
 128         TK_A_OWNER_ID,                  /* uid_t */
 129         TK_A_GROUP_ID,                  /* gid_t */
 130         TK_A_MODE_ID,                   /* mode_t */
 131         TK_A_ENV,                       /* val, attr */
 132         TK_A_NAME,                      /* val */
 133         TK_A_DEVLINK,                   /* val */
 134         TK_A_EVENT_TIMEOUT,             /* int */
 135         TK_A_IGNORE_REMOVE,
 136         TK_A_ATTR,                      /* val, attr */
 137         TK_A_RUN,                       /* val, bool */
 138         TK_A_GOTO,                      /* size_t */
 139         TK_A_LAST_RULE,
 140
 141         TK_END,
 142 };
 143
 144 /* we try to pack stuff in a way that we take only 12 bytes per token */
 145 struct token {
 146         union {
 147                 unsigned char type;             /* same as in rule and key */
 148                 struct {
 149                         unsigned char type;
 150                         unsigned char flags;
 151                         unsigned short token_count;
 152                         unsigned int label_off;
 153                         unsigned short filename_off;
 154                         unsigned short filename_line;
 155                 } rule;
 156                 struct {
 157                         unsigned char type;
 158                         unsigned char flags;
 159                         unsigned char op;
 160                         unsigned char glob;
 161                         unsigned int value_off;
 162                         union {
 163                                 unsigned int attr_off;
 164                                 int ignore_error;
 165                                 int i;
 166                                 unsigned int rule_goto;
 167                                 mode_t  mode;
 168                                 uid_t uid;
 169                                 gid_t gid;
 170                                 int num_fake_part;
 171                                 int devlink_prio;
 172                                 int event_timeout;
 173                         };
 174                 } key;
 175         };
 176 };
 177
 178 #define MAX_TK          64
 179 struct rule_tmp {
 180         struct udev_rules *rules;
 181         struct token rule;
 182         struct token token[MAX_TK];
 183         unsigned int token_cur;
 184 };
 185
 186 #ifdef DEBUG
 187 static const char *operation_str(enum operation_type type)
 188 {
 189         static const char *operation_strs[] = {
 190                 [OP_UNSET] =            "UNSET",
 191                 [OP_MATCH] =            "match",
 192                 [OP_NOMATCH] =          "nomatch",
 193                 [OP_MATCH_MAX] =        "MATCH_MAX",
 194
 195                 [OP_ADD] =              "add",
 196                 [OP_ASSIGN] =           "assign",
 197                 [OP_ASSIGN_FINAL] =     "assign-final",
 198 }       ;
 199
 200         return operation_strs[type];
 201 }
 202
 203 static const char *string_glob_str(enum string_glob_type type)
 204 {
 205         static const char *string_glob_strs[] = {
 206                 [GL_UNSET] =            "UNSET",
 207                 [GL_PLAIN] =            "plain",
 208                 [GL_GLOB] =             "glob",
 209                 [GL_SPLIT] =            "split",
 210                 [GL_SPLIT_GLOB] =       "split-glob",
 211                 [GL_SOMETHING] =        "split-glob",
 212                 [GL_FORMAT] =           "format",
 213         };
 214
 215         return string_glob_strs[type];
 216 }
 217
 218 static const char *token_str(enum token_type type)
 219 {
 220         static const char *token_strs[] = {
 221                 [TK_UNSET] =                    "UNSET",
 222                 [TK_RULE] =                     "RULE",
 223
 224                 [TK_M_ACTION] =                 "M ACTION",
 225                 [TK_M_DEVPATH] =                "M DEVPATH",
 226                 [TK_M_KERNEL] =                 "M KERNEL",
 227                 [TK_M_DEVLINK] =                "M DEVLINK",
 228                 [TK_M_NAME] =                   "M NAME",
 229                 [TK_M_ENV] =                    "M ENV",
 230                 [TK_M_SUBSYSTEM] =              "M SUBSYSTEM",
 231                 [TK_M_DRIVER] =                 "M DRIVER",
 232                 [TK_M_WAITFOR] =                "M WAITFOR",
 233                 [TK_M_ATTR] =                   "M ATTR",
 234
 235                 [TK_M_PARENTS_MIN] =            "M PARENTS_MIN",
 236                 [TK_M_KERNELS] =                "M KERNELS",
 237                 [TK_M_SUBSYSTEMS] =             "M SUBSYSTEMS",
 238                 [TK_M_DRIVERS] =                "M DRIVERS",
 239                 [TK_M_ATTRS] =                  "M ATTRS",
 240                 [TK_M_PARENTS_MAX] =            "M PARENTS_MAX",
 241
 242                 [TK_M_TEST] =                   "M TEST",
 243                 [TK_M_PROGRAM] =                "M PROGRAM",
 244                 [TK_M_IMPORT_FILE] =            "M IMPORT_FILE",
 245                 [TK_M_IMPORT_PROG] =            "M IMPORT_PROG",
 246                 [TK_M_IMPORT_PARENT] =          "M MPORT_PARENT",
 247                 [TK_M_RESULT] =                 "M RESULT",
 248                 [TK_M_MAX] =                    "M MAX",
 249
 250                 [TK_A_IGNORE_DEVICE] =          "A IGNORE_DEVICE",
 251                 [TK_A_STRING_ESCAPE_NONE] =     "A STRING_ESCAPE_NONE",
 252                 [TK_A_STRING_ESCAPE_REPLACE] =  "A STRING_ESCAPE_REPLACE",
 253                 [TK_A_NUM_FAKE_PART] =          "A NUM_FAKE_PART",
 254                 [TK_A_DEVLINK_PRIO] =           "A DEVLINK_PRIO",
 255                 [TK_A_OWNER] =                  "A OWNER",
 256                 [TK_A_GROUP] =                  "A GROUP",
 257                 [TK_A_MODE] =                   "A MODE",
 258                 [TK_A_OWNER_ID] =               "A OWNER_ID",
 259                 [TK_A_GROUP_ID] =               "A GROUP_ID",
 260                 [TK_A_MODE_ID] =                "A MODE_ID",
 261                 [TK_A_ENV] =                    "A ENV",
 262                 [TK_A_NAME] =                   "A NAME",
 263                 [TK_A_DEVLINK] =                "A DEVLINK",
 264                 [TK_A_EVENT_TIMEOUT] =          "A EVENT_TIMEOUT",
 265                 [TK_A_IGNORE_REMOVE] =          "A IGNORE_REMOVE",
 266                 [TK_A_ATTR] =                   "A ATTR",
 267                 [TK_A_RUN] =                    "A RUN",
 268                 [TK_A_GOTO] =                   "A GOTO",
 269                 [TK_A_LAST_RULE] =              "A LAST_RULE",
 270
 271                 [TK_END] =                      "END",
 272         };
 273
 274         return token_strs[type];
 275 }
 276
 277 static void dump_token(struct udev_rules *rules, struct token *token)
 278 {
 279         enum token_type type = token->type;
 280         enum operation_type op = token->key.op;
 281         enum string_glob_type glob = token->key.glob;
 282         const char *value = &rules->buf[token->key.value_off];
 283         const char *attr = &rules->buf[token->key.attr_off];
 284
 285         switch (type) {
 286         case TK_RULE:
 287                 {
 288                         const char *tks_ptr = (char *)rules->tokens;
 289                         const char *tk_ptr = (char *)token;
 290                         unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
 291
 292                         dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
 293                             &rules->buf[token->rule.filename_off], token->rule.filename_line,
 294                             idx, token->rule.token_count,
 295                             &rules->buf[token->rule.label_off],
 296                             token->rule.flags);
 297                         break;
 298                 }
 299         case TK_M_ACTION:
 300         case TK_M_DEVPATH:
 301         case TK_M_KERNEL:
 302         case TK_M_SUBSYSTEM:
 303         case TK_M_DRIVER:
 304         case TK_M_WAITFOR:
 305         case TK_M_DEVLINK:
 306         case TK_M_NAME:
 307         case TK_M_KERNELS:
 308         case TK_M_SUBSYSTEMS:
 309         case TK_M_DRIVERS:
 310         case TK_M_PROGRAM:
 311         case TK_M_IMPORT_FILE:
 312         case TK_M_IMPORT_PROG:
 313         case TK_M_IMPORT_PARENT:
 314         case TK_M_RESULT:
 315         case TK_A_NAME:
 316         case TK_A_DEVLINK:
 317         case TK_A_OWNER:
 318         case TK_A_GROUP:
 319         case TK_A_MODE:
 320         case TK_A_RUN:
 321                 dbg(rules->udev, "%s %s '%s'(%s)\n",
 322                     token_str(type), operation_str(op), value, string_glob_str(glob));
 323                 break;
 324         case TK_M_ATTR:
 325         case TK_M_ATTRS:
 326         case TK_M_ENV:
 327         case TK_A_ATTR:
 328         case TK_A_ENV:
 329                 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
 330                     token_str(type), operation_str(op), attr, value, string_glob_str(glob));
 331                 break;
 332         case TK_A_IGNORE_DEVICE:
 333         case TK_A_STRING_ESCAPE_NONE:
 334         case TK_A_STRING_ESCAPE_REPLACE:
 335         case TK_A_LAST_RULE:
 336         case TK_A_IGNORE_REMOVE:
 337                 dbg(rules->udev, "%s\n", token_str(type));
 338                 break;
 339         case TK_M_TEST:
 340                 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
 341                     token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
 342                 break;
 343         case TK_A_NUM_FAKE_PART:
 344                 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
 345                 break;
 346         case TK_A_DEVLINK_PRIO:
 347                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
 348                 break;
 349         case TK_A_OWNER_ID:
 350                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
 351                 break;
 352         case TK_A_GROUP_ID:
 353                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
 354                 break;
 355         case TK_A_MODE_ID:
 356                 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
 357                 break;
 358         case TK_A_EVENT_TIMEOUT:
 359                 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
 360                 break;
 361         case TK_A_GOTO:
 362                 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
 363                 break;
 364         case TK_END:
 365                 dbg(rules->udev, "* %s\n", token_str(type));
 366                 break;
 367         case TK_M_PARENTS_MIN:
 368         case TK_M_PARENTS_MAX:
 369         case TK_M_MAX:
 370         case TK_UNSET:
 371                 dbg(rules->udev, "unknown type %u\n", type);
 372                 break;
 373         }
 374 }
 375
 376 static void dump_rules(struct udev_rules *rules)
 377 {
 378         unsigned int i;
 379
 380         dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
 381             rules->token_cur,
 382             rules->token_cur * sizeof(struct token),
 383             rules->buf_count,
 384             rules->buf_cur);
 385         for(i = 0; i < rules->token_cur; i++)
 386                 dump_token(rules, &rules->tokens[i]);
 387 }
 388 #else
 389 static inline const char *operation_str(enum operation_type type) { return NULL; }
 390 static inline const char *token_str(enum token_type type) { return NULL; }
 391 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
 392 static inline void dump_rules(struct udev_rules *rules) {}
 393 #endif /* DEBUG */
 394
 395 /* we could lookup and return existing strings, or tails of strings */
 396 static int add_string(struct udev_rules *rules, const char *str)
 397 {
 398         size_t len = strlen(str)+1;
 399         int off;
 400
 401         /* offset 0 is always '\0' */
 402         if (str[0] == '\0')
 403                 return 0;
 404
 405         /* grow buffer if needed */
 406         if (rules->buf_cur + len+1 >= rules->buf_max) {
 407                 char *buf;
 408                 unsigned int add;
 409
 410                 /* double the buffer size */
 411                 add = rules->buf_max;
 412                 if (add < len * 8)
 413                         add = len * 8;
 414
 415                 buf = realloc(rules->buf, rules->buf_max + add);
 416                 if (buf == NULL)
 417                         return -1;
 418                 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
 419                 rules->buf = buf;
 420                 rules->buf_max += add;
 421         }
 422         off = rules->buf_cur;
 423         memcpy(&rules->buf[rules->buf_cur], str, len);
 424         rules->buf_cur += len;
 425         rules->buf_count++;
 426         return off;
 427 }
 428
 429 static int add_token(struct udev_rules *rules, struct token *token)
 430 {
 431
 432         /* grow buffer if needed */
 433         if (rules->token_cur+1 >= rules->token_max) {
 434                 struct token *tokens;
 435                 unsigned int add;
 436
 437                 /* double the buffer size */
 438                 add = rules->token_max;
 439                 if (add < 8)
 440                         add = 8;
 441
 442                 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
 443                 if (tokens == NULL)
 444                         return -1;
 445                 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
 446                 rules->tokens = tokens;
 447                 rules->token_max += add;
 448         }
 449         memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
 450         rules->token_cur++;
 451         return 0;
 452 }
 453
 454 static uid_t add_uid(struct udev_rules *rules, const char *owner)
 455 {
 456         unsigned int i;
 457         uid_t uid;
 458         unsigned int off;
 459
 460         /* lookup, if we know it already */
 461         for (i = 0; i < rules->uids_cur; i++) {
 462                 off = rules->uids[i].name_off;
 463                 if (strcmp(&rules->buf[off], owner) == 0) {
 464                         uid = rules->uids[i].uid;
 465                         dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
 466                         return uid;
 467                 }
 468         }
 469         uid = util_lookup_user(rules->udev, owner);
 470
 471         /* grow buffer if needed */
 472         if (rules->uids_cur+1 >= rules->uids_max) {
 473                 struct uid_gid *uids;
 474                 unsigned int add;
 475
 476                 /* double the buffer size */
 477                 add = rules->uids_max;
 478                 if (add < 1)
 479                         add = 8;
 480
 481                 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
 482                 if (uids == NULL)
 483                         return uid;
 484                 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
 485                 rules->uids = uids;
 486                 rules->uids_max += add;
 487         }
 488         rules->uids[rules->uids_cur].uid = uid;
 489         off = add_string(rules, owner);
 490         if (off <= 0)
 491                 return uid;
 492         rules->uids[rules->uids_cur].name_off = off;
 493         rules->uids_cur++;
 494         return uid;
 495 }
 496
 497 static gid_t add_gid(struct udev_rules *rules, const char *group)
 498 {
 499         unsigned int i;
 500         gid_t gid;
 501         unsigned int off;
 502
 503         /* lookup, if we know it already */
 504         for (i = 0; i < rules->gids_cur; i++) {
 505                 off = rules->gids[i].name_off;
 506                 if (strcmp(&rules->buf[off], group) == 0) {
 507                         gid = rules->gids[i].gid;
 508                         dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
 509                         return gid;
 510                 }
 511         }
 512         gid = util_lookup_group(rules->udev, group);
 513
 514         /* grow buffer if needed */
 515         if (rules->gids_cur+1 >= rules->gids_max) {
 516                 struct uid_gid *gids;
 517                 unsigned int add;
 518
 519                 /* double the buffer size */
 520                 add = rules->gids_max;
 521                 if (add < 1)
 522                         add = 8;
 523
 524                 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
 525                 if (gids == NULL)
 526                         return gid;
 527                 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
 528                 rules->gids = gids;
 529                 rules->gids_max += add;
 530         }
 531         rules->gids[rules->gids_cur].gid = gid;
 532         off = add_string(rules, group);
 533         if (off <= 0)
 534                 return gid;
 535         rules->gids[rules->gids_cur].name_off = off;
 536         rules->gids_cur++;
 537         return gid;
 538 }
 539
 540 static int import_property_from_string(struct udev_device *dev, char *line)
 541 {
 542         struct udev *udev = udev_device_get_udev(dev);
 543         char *key;
 544         char *val;
 545         size_t len;
 546
 547         /* find key */
 548         key = line;
 549         while (isspace(key[0]))
 550                 key++;
 551
 552         /* comment or empty line */
 553         if (key[0] == '#' || key[0] == '\0')
 554                 return -1;
 555
 556         /* split key/value */
 557         val = strchr(key, '=');
 558         if (val == NULL)
 559                 return -1;
 560         val[0] = '\0';
 561         val++;
 562
 563         /* find value */
 564         while (isspace(val[0]))
 565                 val++;
 566
 567         /* terminate key */
 568         len = strlen(key);
 569         if (len == 0)
 570                 return -1;
 571         while (isspace(key[len-1]))
 572                 len--;
 573         key[len] = '\0';
 574
 575         /* terminate value */
 576         len = strlen(val);
 577         if (len == 0)
 578                 return -1;
 579         while (isspace(val[len-1]))
 580                 len--;
 581         val[len] = '\0';
 582
 583         if (len == 0)
 584                 return -1;
 585
 586         /* unquote */
 587         if (val[0] == '"' || val[0] == '\'') {
 588                 if (val[len-1] != val[0]) {
 589                         info(udev, "inconsistent quoting: '%s', skip\n", line);
 590                         return -1;
 591                 }
 592                 val[len-1] = '\0';
 593                 val++;
 594         }
 595
 596         dbg(udev, "adding '%s'='%s'\n", key, val);
 597
 598         /* handle device, renamed by external tool, returning new path */
 599         if (strcmp(key, "DEVPATH") == 0) {
 600                 char syspath[UTIL_PATH_SIZE];
 601
 602                 info(udev, "updating devpath from '%s' to '%s'\n",
 603                      udev_device_get_devpath(dev), val);
 604                 util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
 605                 util_strlcat(syspath, val, sizeof(syspath));
 606                 udev_device_set_syspath(dev, syspath);
 607         } else {
 608                 struct udev_list_entry *entry;
 609
 610                 entry = udev_device_add_property(dev, key, val);
 611                 /* store in db */
 612                 udev_list_entry_set_flag(entry, 1);
 613         }
 614         return 0;
 615 }
 616
 617 static int import_file_into_properties(struct udev_device *dev, const char *filename)
 618 {
 619         FILE *f;
 620         char line[UTIL_LINE_SIZE];
 621
 622         f = fopen(filename, "r");
 623         if (f == NULL)
 624                 return -1;
 625         while (fgets(line, sizeof(line), f) != NULL)
 626                 import_property_from_string(dev, line);
 627         fclose(f);
 628         return 0;
 629 }
 630
 631 static int import_program_into_properties(struct udev_device *dev, const char *program)
 632 {
 633         struct udev *udev = udev_device_get_udev(dev);
 634         char **envp;
 635         char result[2048];
 636         size_t reslen;
 637         char *line;
 638
 639         envp = udev_device_get_properties_envp(dev);
 640         if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
 641                 return -1;
 642
 643         line = result;
 644         while (line != NULL) {
 645                 char *pos;
 646
 647                 pos = strchr(line, '\n');
 648                 if (pos != NULL) {
 649                         pos[0] = '\0';
 650                         pos = &pos[1];
 651                 }
 652                 import_property_from_string(dev, line);
 653                 line = pos;
 654         }
 655         return 0;
 656 }
 657
 658 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
 659 {
 660         struct udev *udev = udev_device_get_udev(dev);
 661         struct udev_device *dev_parent;
 662         struct udev_list_entry *list_entry;
 663
 664         dev_parent = udev_device_get_parent(dev);
 665         if (dev_parent == NULL)
 666                 return -1;
 667
 668         dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
 669         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
 670                 const char *key = udev_list_entry_get_name(list_entry);
 671                 const char *val = udev_list_entry_get_value(list_entry);
 672
 673                 if (fnmatch(filter, key, 0) == 0) {
 674                         struct udev_list_entry *entry;
 675
 676                         dbg(udev, "import key '%s=%s'\n", key, val);
 677                         entry = udev_device_add_property(dev, key, val);
 678                         /* store in db */
 679                         udev_list_entry_set_flag(entry, 1);
 680                 }
 681         }
 682         return 0;
 683 }
 684
 685 #define WAIT_LOOP_PER_SECOND            50
 686 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
 687 {
 688         struct udev *udev = udev_device_get_udev(dev);
 689         char filepath[UTIL_PATH_SIZE];
 690         char devicepath[UTIL_PATH_SIZE];
 691         struct stat stats;
 692         int loop = timeout * WAIT_LOOP_PER_SECOND;
 693
 694         /* a relative path is a device attribute */
 695         devicepath[0] = '\0';
 696         if (file[0] != '/') {
 697                 util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath));
 698                 util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath));
 699
 700                 util_strlcpy(filepath, devicepath, sizeof(filepath));
 701                 util_strlcat(filepath, "/", sizeof(filepath));
 702                 util_strlcat(filepath, file, sizeof(filepath));
 703                 file = filepath;
 704         }
 705
 706         dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
 707         while (--loop) {
 708                 /* lookup file */
 709                 if (stat(file, &stats) == 0) {
 710                         info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
 711                         return 0;
 712                 }
 713                 /* make sure, the device did not disappear in the meantime */
 714                 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
 715                         info(udev, "device disappeared while waiting for '%s'\n", file);
 716                         return -2;
 717                 }
 718                 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
 719                 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
 720         }
 721         info(udev, "waiting for '%s' failed\n", file);
 722         return -1;
 723 }
 724
 725 static int attr_subst_subdir(char *attr, size_t len)
 726 {
 727         char *pos;
 728         int found = 0;
 729
 730         pos = strstr(attr, "/*/");
 731         if (pos != NULL) {
 732                 char str[UTIL_PATH_SIZE];
 733                 DIR *dir;
 734
 735                 pos[1] = '\0';
 736                 util_strlcpy(str, &pos[2], sizeof(str));
 737                 dir = opendir(attr);
 738                 if (dir != NULL) {
 739                         struct dirent *dent;
 740
 741                         for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 742                                 struct stat stats;
 743
 744                                 if (dent->d_name[0] == '.')
 745                                         continue;
 746                                 util_strlcat(attr, dent->d_name, len);
 747                                 util_strlcat(attr, str, len);
 748                                 if (stat(attr, &stats) == 0) {
 749                                         found = 1;
 750                                         break;
 751                                 }
 752                                 pos[1] = '\0';
 753                         }
 754                         closedir(dir);
 755                 }
 756                 if (!found)
 757                         util_strlcat(attr, str, len);
 758         }
 759
 760         return found;
 761 }
 762
 763 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
 764 {
 765         char *linepos;
 766         char *temp;
 767
 768         linepos = *line;
 769         if (linepos == NULL && linepos[0] == '\0')
 770                 return -1;
 771
 772         /* skip whitespace */
 773         while (isspace(linepos[0]) || linepos[0] == ',')
 774                 linepos++;
 775
 776         /* get the key */
 777         if (linepos[0] == '\0')
 778                 return -1;
 779         *key = linepos;
 780
 781         while (1) {
 782                 linepos++;
 783                 if (linepos[0] == '\0')
 784                         return -1;
 785                 if (isspace(linepos[0]))
 786                         break;
 787                 if (linepos[0] == '=')
 788                         break;
 789                 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
 790                         if (linepos[1] == '=')
 791                                 break;
 792         }
 793
 794         /* remember end of key */
 795         temp = linepos;
 796
 797         /* skip whitespace after key */
 798         while (isspace(linepos[0]))
 799                 linepos++;
 800         if (linepos[0] == '\0')
 801                 return -1;
 802
 803         /* get operation type */
 804         if (linepos[0] == '=' && linepos[1] == '=') {
 805                 *op = OP_MATCH;
 806                 linepos += 2;
 807         } else if (linepos[0] == '!' && linepos[1] == '=') {
 808                 *op = OP_NOMATCH;
 809                 linepos += 2;
 810         } else if (linepos[0] == '+' && linepos[1] == '=') {
 811                 *op = OP_ADD;
 812                 linepos += 2;
 813         } else if (linepos[0] == '=') {
 814                 *op = OP_ASSIGN;
 815                 linepos++;
 816         } else if (linepos[0] == ':' && linepos[1] == '=') {
 817                 *op = OP_ASSIGN_FINAL;
 818                 linepos += 2;
 819         } else
 820                 return -1;
 821
 822         /* terminate key */
 823         temp[0] = '\0';
 824
 825         /* skip whitespace after operator */
 826         while (isspace(linepos[0]))
 827                 linepos++;
 828         if (linepos[0] == '\0')
 829                 return -1;
 830
 831         /* get the value */
 832         if (linepos[0] == '"')
 833                 linepos++;
 834         else
 835                 return -1;
 836         *value = linepos;
 837
 838         /* terminate */
 839         temp = strchr(linepos, '"');
 840         if (!temp)
 841                 return -1;
 842         temp[0] = '\0';
 843         temp++;
 844         dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
 845
 846         /* move line to next key */
 847         *line = temp;
 848         return 0;
 849 }
 850
 851 /* extract possible KEY{attr} */
 852 static char *get_key_attribute(struct udev *udev, char *str)
 853 {
 854         char *pos;
 855         char *attr;
 856
 857         attr = strchr(str, '{');
 858         if (attr != NULL) {
 859                 attr++;
 860                 pos = strchr(attr, '}');
 861                 if (pos == NULL) {
 862                         err(udev, "missing closing brace for format\n");
 863                         return NULL;
 864                 }
 865                 pos[0] = '\0';
 866                 dbg(udev, "attribute='%s'\n", attr);
 867                 return attr;
 868         }
 869         return NULL;
 870 }
 871
 872 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
 873                         enum operation_type op,
 874                         const char *value, const void *data)
 875 {
 876         struct token *token = &rule_tmp->token[rule_tmp->token_cur];
 877         const char *attr = data;
 878         enum string_glob_type glob;
 879
 880         memset(token, 0x00, sizeof(struct token));
 881
 882         switch (type) {
 883         case TK_M_ACTION:
 884         case TK_M_DEVPATH:
 885         case TK_M_KERNEL:
 886         case TK_M_SUBSYSTEM:
 887         case TK_M_DRIVER:
 888         case TK_M_WAITFOR:
 889         case TK_M_DEVLINK:
 890         case TK_M_NAME:
 891         case TK_M_KERNELS:
 892         case TK_M_SUBSYSTEMS:
 893         case TK_M_DRIVERS:
 894         case TK_M_PROGRAM:
 895         case TK_M_IMPORT_FILE:
 896         case TK_M_IMPORT_PROG:
 897         case TK_M_IMPORT_PARENT:
 898         case TK_M_RESULT:
 899         case TK_A_OWNER:
 900         case TK_A_GROUP:
 901         case TK_A_MODE:
 902         case TK_A_NAME:
 903         case TK_A_DEVLINK:
 904         case TK_A_GOTO:
 905                 token->key.value_off = add_string(rule_tmp->rules, value);
 906                 break;
 907         case TK_M_ENV:
 908         case TK_M_ATTR:
 909         case TK_M_ATTRS:
 910         case TK_A_ATTR:
 911         case TK_A_ENV:
 912                 token->key.value_off = add_string(rule_tmp->rules, value);
 913                 token->key.attr_off = add_string(rule_tmp->rules, attr);
 914                 break;
 915         case TK_M_TEST:
 916                 token->key.value_off = add_string(rule_tmp->rules, value);
 917                 if (data != NULL)
 918                         token->key.mode = *(mode_t *)data;
 919                 break;
 920         case TK_A_IGNORE_DEVICE:
 921         case TK_A_STRING_ESCAPE_NONE:
 922         case TK_A_STRING_ESCAPE_REPLACE:
 923         case TK_A_IGNORE_REMOVE:
 924         case TK_A_LAST_RULE:
 925                 break;
 926         case TK_A_RUN:
 927                 token->key.value_off = add_string(rule_tmp->rules, value);
 928                 token->key.ignore_error = *(int *)data;
 929                 break;
 930         case TK_A_NUM_FAKE_PART:
 931                 token->key.num_fake_part = *(int *)data;
 932                 break;
 933         case TK_A_DEVLINK_PRIO:
 934                 token->key.devlink_prio = *(int *)data;
 935                 break;
 936         case TK_A_OWNER_ID:
 937                 token->key.uid = *(uid_t *)data;
 938                 break;
 939         case TK_A_GROUP_ID:
 940                 token->key.gid = *(gid_t *)data;
 941                 break;
 942         case TK_A_MODE_ID:
 943                 token->key.mode = *(mode_t *)data;
 944                 break;
 945         case TK_A_EVENT_TIMEOUT:
 946                 token->key.event_timeout = *(int *)data;
 947                 break;
 948         case TK_RULE:
 949         case TK_M_PARENTS_MIN:
 950         case TK_M_PARENTS_MAX:
 951         case TK_M_MAX:
 952         case TK_END:
 953         case TK_UNSET:
 954                 err(rule_tmp->rules->udev, "wrong type %u\n", type);
 955                 return -1;
 956         }
 957
 958         glob = GL_PLAIN;
 959         if (value != NULL) {
 960                 if (type < TK_M_MAX) {
 961                         /* check if we need to split or call fnmatch() while matching rules */
 962                         int has_split;
 963                         int has_glob;
 964
 965                         has_split = (strchr(value, '|') != NULL);
 966                         has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||
 967                                     strchr(value, '[') != NULL || strchr(value, ']') != NULL);
 968                         if (has_split && has_glob) {
 969                                 glob = GL_SPLIT_GLOB;
 970                         } else if (has_split) {
 971                                 glob = GL_SPLIT;
 972                         } else if (has_glob) {
 973                                 if (strcmp(value, "?*") == 0)
 974                                         glob = GL_SOMETHING;
 975                                 else
 976                                         glob = GL_GLOB;
 977                         }
 978                 } else {
 979                         /* check if we need to substitute format strings for matching rules */
 980                         if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
 981                                 glob = GL_FORMAT;
 982                 }
 983         }
 984
 985         token->key.type = type;
 986         token->key.op = op;
 987         token->key.glob = glob;
 988         rule_tmp->token_cur++;
 989         if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
 990                 err(rule_tmp->rules->udev, "temporary rule array too small\n");
 991                 return -1;
 992         }
 993         return 0;
 994 }
 995
 996 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
 997 {
 998         unsigned int i;
 999         unsigned int start = 0;
1000         unsigned int end = rule_tmp->token_cur;
1001
1002         for (i = 0; i < rule_tmp->token_cur; i++) {
1003                 enum token_type next_val = TK_UNSET;
1004                 unsigned int next_idx;
1005                 unsigned int j;
1006
1007                 /* find smallest value */
1008                 for (j = start; j < end; j++) {
1009                         if (rule_tmp->token[j].type == TK_UNSET)
1010                                 continue;
1011                         if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1012                                 next_val = rule_tmp->token[j].type;
1013                                 next_idx = j;
1014                         }
1015                 }
1016
1017                 /* add token and mark done */
1018                 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1019                         return -1;
1020                 rule_tmp->token[next_idx].type = TK_UNSET;
1021
1022                 /* shrink range */
1023                 if (next_idx == start)
1024                         start++;
1025                 if (next_idx+1 == end)
1026                         end--;
1027         }
1028         return 0;
1029 }
1030
1031 static int add_rule(struct udev_rules *rules, char *line,
1032                     const char *filename, unsigned int filename_off, unsigned int lineno)
1033 {
1034         int valid = 0;
1035         char *linepos;
1036         char *attr;
1037         int physdev = 0;
1038         struct rule_tmp rule_tmp;
1039
1040         memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1041         rule_tmp.rules = rules;
1042         rule_tmp.rule.type = TK_RULE;
1043         rule_tmp.rule.rule.filename_off = filename_off;
1044         rule_tmp.rule.rule.filename_line = lineno;
1045
1046         linepos = line;
1047         while (1) {
1048                 char *key;
1049                 char *value;
1050                 enum operation_type op;
1051
1052                 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1053                         break;
1054
1055                 if (strcasecmp(key, "ACTION") == 0) {
1056                         if (op > OP_MATCH_MAX) {
1057                                 err(rules->udev, "invalid ACTION operation\n");
1058                                 goto invalid;
1059                         }
1060                         rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1061                         valid = 1;
1062                         continue;
1063                 }
1064
1065                 if (strcasecmp(key, "DEVPATH") == 0) {
1066                         if (op > OP_MATCH_MAX) {
1067                                 err(rules->udev, "invalid DEVPATH operation\n");
1068                                 goto invalid;
1069                         }
1070                         rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1071                         valid = 1;
1072                         continue;
1073                 }
1074
1075                 if (strcasecmp(key, "KERNEL") == 0) {
1076                         if (op > OP_MATCH_MAX) {
1077                                 err(rules->udev, "invalid KERNEL operation\n");
1078                                 goto invalid;
1079                         }
1080                         rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1081                         valid = 1;
1082                         continue;
1083                 }
1084
1085                 if (strcasecmp(key, "SUBSYSTEM") == 0) {
1086                         if (op > OP_MATCH_MAX) {
1087                                 err(rules->udev, "invalid SUBSYSTEM operation\n");
1088                                 goto invalid;
1089                         }
1090                         /* bus, class, subsystem events should all be the same */
1091                         if (strcmp(value, "subsystem") == 0 ||
1092                             strcmp(value, "bus") == 0 ||
1093                             strcmp(value, "class") == 0) {
1094                                 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1095                                         err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1096                                             "please fix it in %s:%u", value, filename, lineno);
1097                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1098                         } else
1099                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1100                         valid = 1;
1101                         continue;
1102                 }
1103
1104                 if (strcasecmp(key, "DRIVER") == 0) {
1105                         if (op > OP_MATCH_MAX) {
1106                                 err(rules->udev, "invalid DRIVER operation\n");
1107                                 goto invalid;
1108                         }
1109                         rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1110                         valid = 1;
1111                         continue;
1112                 }
1113
1114                 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1115                         attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1116                         if (attr == NULL) {
1117                                 err(rules->udev, "error parsing ATTR attribute\n");
1118                                 goto invalid;
1119                         }
1120                         if (op < OP_MATCH_MAX) {
1121                                 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1122                         } else {
1123                                 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1124                         }
1125                         valid = 1;
1126                         continue;
1127                 }
1128
1129                 if (strcasecmp(key, "KERNELS") == 0 ||
1130                     strcasecmp(key, "ID") == 0) {
1131                         if (op > OP_MATCH_MAX) {
1132                                 err(rules->udev, "invalid KERNELS operation\n");
1133                                 goto invalid;
1134                         }
1135                         rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1136                         valid = 1;
1137                         continue;
1138                 }
1139
1140                 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
1141                     strcasecmp(key, "BUS") == 0) {
1142                         if (op > OP_MATCH_MAX) {
1143                                 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1144                                 goto invalid;
1145                         }
1146                         rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1147                         valid = 1;
1148                         continue;
1149                 }
1150
1151                 if (strcasecmp(key, "DRIVERS") == 0) {
1152                         if (op > OP_MATCH_MAX) {
1153                                 err(rules->udev, "invalid DRIVERS operation\n");
1154                                 goto invalid;
1155                         }
1156                         rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1157                         valid = 1;
1158                         continue;
1159                 }
1160
1161                 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1162                     strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1163                         if (op > OP_MATCH_MAX) {
1164                                 err(rules->udev, "invalid ATTRS operation\n");
1165                                 goto invalid;
1166                         }
1167                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1168                         if (attr == NULL) {
1169                                 err(rules->udev, "error parsing ATTRS attribute\n");
1170                                 goto invalid;
1171                         }
1172                         if (strncmp(attr, "device/", 7) == 0)
1173                                 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1174                                     "please fix it in %s:%u", filename, lineno);
1175                         else if (strstr(attr, "../") != NULL)
1176                                 err(rules->udev, "do not reference parent sysfs directories directly, "
1177                                     "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1178                         rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1179                         valid = 1;
1180                         continue;
1181                 }
1182
1183                 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1184                         attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1185                         if (attr == NULL) {
1186                                 err(rules->udev, "error parsing ENV attribute\n");
1187                                 goto invalid;
1188                         }
1189                         if (strncmp(attr, "PHYSDEV", 7) == 0)
1190                                 physdev = 1;
1191                         if (op < OP_MATCH_MAX) {
1192                                 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1193                                         goto invalid;
1194                         } else {
1195                                 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1196                                         goto invalid;
1197                         }
1198                         valid = 1;
1199                         continue;
1200                 }
1201
1202                 if (strcasecmp(key, "PROGRAM") == 0) {
1203                         rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1204                         valid = 1;
1205                         continue;
1206                 }
1207
1208                 if (strcasecmp(key, "RESULT") == 0) {
1209                         if (op > OP_MATCH_MAX) {
1210                                 err(rules->udev, "invalid RESULT operation\n");
1211                                 goto invalid;
1212                         }
1213                         rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1214                         valid = 1;
1215                         continue;
1216                 }
1217
1218                 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1219                         attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1220                         if (attr != NULL && strstr(attr, "program")) {
1221                                 dbg(rules->udev, "IMPORT will be executed\n");
1222                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1223                                 valid = 1;
1224                         } else if (attr != NULL && strstr(attr, "file")) {
1225                                 dbg(rules->udev, "IMPORT will be included as file\n");
1226                                 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1227                                 valid = 1;
1228                         } else if (attr != NULL && strstr(attr, "parent")) {
1229                                 dbg(rules->udev, "IMPORT will include the parent values\n");
1230                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1231                                 valid = 1;
1232                         } else {
1233                                 /* figure it out if it is executable */
1234                                 char file[UTIL_PATH_SIZE];
1235                                 char *pos;
1236                                 struct stat statbuf;
1237
1238                                 util_strlcpy(file, value, sizeof(file));
1239                                 pos = strchr(file, ' ');
1240                                 if (pos)
1241                                         pos[0] = '\0';
1242
1243                                 /* allow programs in /lib/udev called without the path */
1244                                 if (strchr(file, '/') == NULL) {
1245                                         util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));
1246                                         util_strlcat(file, value, sizeof(file));
1247                                         pos = strchr(file, ' ');
1248                                         if (pos)
1249                                                 pos[0] = '\0';
1250                                 }
1251
1252                                 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1253                                 if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
1254                                         dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1255                                         rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1256                                         valid = 1;
1257                                 } else {
1258                                         dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1259                                         rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1260                                         valid = 1;
1261                                 }
1262                         }
1263                         continue;
1264                 }
1265
1266                 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1267                         mode_t mode = 0;
1268
1269                         if (op > OP_MATCH_MAX) {
1270                                 err(rules->udev, "invalid TEST operation\n");
1271                                 goto invalid;
1272                         }
1273                         attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1274                         if (attr != NULL) {
1275                                 mode = strtol(attr, NULL, 8);
1276                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1277                         } else {
1278                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1279                         }
1280                         valid = 1;
1281                         continue;
1282                 }
1283
1284                 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1285                         int flag = 0;
1286
1287                         attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1288                         if (attr != NULL && strstr(attr, "ignore_error"))
1289                                 flag = 1;
1290                         rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1291                         valid = 1;
1292                         continue;
1293                 }
1294
1295                 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1296                         rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1297                         valid = 1;
1298                         continue;
1299                 }
1300
1301                 if (strcasecmp(key, "LABEL") == 0) {
1302                         rule_tmp.rule.rule.label_off = add_string(rules, value);
1303                         valid = 1;
1304                         continue;
1305                 }
1306
1307                 if (strcasecmp(key, "GOTO") == 0) {
1308                         rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1309                         valid = 1;
1310                         continue;
1311                 }
1312
1313                 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1314                         if (op < OP_MATCH_MAX) {
1315                                 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1316                         } else {
1317                                 if (value[0] == '\0')
1318                                         dbg(rules->udev, "name empty, node creation suppressed\n");
1319                                 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1320                                 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1321                                 if (attr != NULL) {
1322                                         if (strstr(attr, "all_partitions") != NULL) {
1323                                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1324
1325                                                 dbg(rules->udev, "creation of partition nodes requested\n");
1326                                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1327                                         }
1328                                         if (strstr(attr, "ignore_remove") != NULL) {
1329                                                 dbg(rules->udev, "remove event should be ignored\n");
1330                                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1331                                         }
1332                                 }
1333                         }
1334                         rule_tmp.rule.rule.flags = 1;
1335                         continue;
1336                 }
1337
1338                 if (strcasecmp(key, "SYMLINK") == 0) {
1339                         if (op < OP_MATCH_MAX)
1340                                 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1341                         else
1342                                 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1343                         rule_tmp.rule.rule.flags = 1;
1344                         valid = 1;
1345                         continue;
1346                 }
1347
1348                 if (strcasecmp(key, "OWNER") == 0) {
1349                         uid_t uid;
1350                         char *endptr;
1351
1352                         uid = strtoul(value, &endptr, 10);
1353                         if (endptr[0] == '\0') {
1354                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1355                         } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1356                                 uid = add_uid(rules, value);
1357                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1358                         } else {
1359                                 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1360                         }
1361                         rule_tmp.rule.rule.flags = 1;
1362                         valid = 1;
1363                         continue;
1364                 }
1365
1366                 if (strcasecmp(key, "GROUP") == 0) {
1367                         gid_t gid;
1368                         char *endptr;
1369
1370                         gid = strtoul(value, &endptr, 10);
1371                         if (endptr[0] == '\0') {
1372                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1373                         } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1374                                 gid = add_gid(rules, value);
1375                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1376                         } else {
1377                                 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1378                         }
1379                         rule_tmp.rule.rule.flags = 1;
1380                         valid = 1;
1381                         continue;
1382                 }
1383
1384                 if (strcasecmp(key, "MODE") == 0) {
1385                         mode_t mode;
1386                         char *endptr;
1387
1388                         mode = strtol(value, &endptr, 8);
1389                         if (endptr[0] == '\0')
1390                                 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1391                         else
1392                                 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1393                         rule_tmp.rule.rule.flags = 1;
1394                         valid = 1;
1395                         continue;
1396                 }
1397
1398                 if (strcasecmp(key, "OPTIONS") == 0) {
1399                         const char *pos;
1400
1401                         if (strstr(value, "last_rule") != NULL) {
1402                                 dbg(rules->udev, "last rule to be applied\n");
1403                                 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1404                         }
1405                         if (strstr(value, "ignore_device") != NULL) {
1406                                 dbg(rules->udev, "device should be ignored\n");
1407                                 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1408                         }
1409                         if (strstr(value, "ignore_remove") != NULL) {
1410                                 dbg(rules->udev, "remove event should be ignored\n");
1411                                 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1412                         }
1413                         pos = strstr(value, "link_priority=");
1414                         if (pos != NULL) {
1415                                 int prio = atoi(&pos[strlen("link_priority=")]);
1416
1417                                 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1418                                 dbg(rules->udev, "link priority=%i\n", prio);
1419                         }
1420                         pos = strstr(value, "event_timeout=");
1421                         if (pos != NULL) {
1422                                 int tout = atoi(&pos[strlen("event_timeout=")]);
1423
1424                                 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1425                                 dbg(rules->udev, "event timout=%i\n", tout);
1426                         }
1427                         pos = strstr(value, "string_escape=");
1428                         if (pos != NULL) {
1429                                 pos = &pos[strlen("string_escape=")];
1430                                 if (strncmp(pos, "none", strlen("none")) == 0)
1431                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1432                                 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1433                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1434                         }
1435                         if (strstr(value, "all_partitions") != NULL) {
1436                                 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1437
1438                                 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1439                                 dbg(rules->udev, "creation of partition nodes requested\n");
1440                         }
1441                         valid = 1;
1442                         continue;
1443                 }
1444                 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1445         }
1446
1447         if (physdev)
1448                 err(rules->udev, "PHYSDEV* values are deprecated and not available on recent kernels, \n"
1449                     "please fix it in %s:%u", filename, lineno);
1450
1451         /* skip line if not any valid key was found */
1452         if (!valid)
1453                 goto invalid;
1454
1455         /* add rule token */
1456         rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1457         if (add_token(rules, &rule_tmp.rule) != 0)
1458                 goto invalid;
1459
1460         /* add tokens to list, sorted by type */
1461         if (sort_token(rules, &rule_tmp) != 0)
1462                 goto invalid;
1463
1464         return 0;
1465 invalid:
1466         err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1467         return -1;
1468 }
1469
1470 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1471 {
1472         FILE *f;
1473         unsigned int first_token;
1474         char line[UTIL_LINE_SIZE];
1475         int line_nr = 0;
1476         unsigned int i;
1477
1478         info(rules->udev, "reading '%s' as rules file\n", filename);
1479
1480         f = fopen(filename, "r");
1481         if (f == NULL)
1482                 return -1;
1483
1484         first_token = rules->token_cur;
1485
1486         while(fgets(line, sizeof(line), f) != NULL) {
1487                 char *key;
1488                 size_t len;
1489
1490                 /* skip whitespace */
1491                 line_nr++;
1492                 key = line;
1493                 while (isspace(key[0]))
1494                         key++;
1495
1496                 /* comment */
1497                 if (key[0] == '#')
1498                         continue;
1499
1500                 len = strlen(line);
1501                 if (len < 3)
1502                         continue;
1503
1504                 /* continue reading if backslash+newline is found */
1505                 while (line[len-2] == '\\') {
1506                         if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1507                                 break;
1508                         line_nr++;
1509                         len = strlen(line);
1510                 }
1511
1512                 if (len+1 >= sizeof(line)) {
1513                         err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1514                         continue;
1515                 }
1516                 add_rule(rules, key, filename, filename_off, line_nr);
1517         }
1518         fclose(f);
1519
1520         /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1521         for (i = first_token+1; i < rules->token_cur; i++) {
1522                 if (rules->tokens[i].type == TK_A_GOTO) {
1523                         char *label = &rules->buf[rules->tokens[i].key.value_off];
1524                         unsigned int j;
1525
1526                         for (j = i+1; j < rules->token_cur; j++) {
1527                                 if (rules->tokens[j].type != TK_RULE)
1528                                         continue;
1529                                 if (rules->tokens[j].rule.label_off == 0)
1530                                         continue;
1531                                 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1532                                         continue;
1533                                 rules->tokens[i].key.rule_goto = j;
1534                         }
1535                         if (rules->tokens[i].key.rule_goto == 0)
1536                                 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1537                 }
1538         }
1539         return 0;
1540 }
1541
1542 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1543 {
1544         DIR *dir;
1545         char filename[UTIL_PATH_SIZE];
1546
1547         dbg(udev, "open directory '%s'\n", dirname);
1548         dir = opendir(dirname);
1549         if (dir == NULL) {
1550                 err(udev, "unable to open '%s': %m\n", dirname);
1551                 return -1;
1552         }
1553
1554         while (1) {
1555                 struct dirent *dent;
1556
1557                 dent = readdir(dir);
1558                 if (dent == NULL || dent->d_name[0] == '\0')
1559                         break;
1560
1561                 if (dent->d_name[0] == '.')
1562                         continue;
1563
1564                 /* look for file matching with specified suffix */
1565                 if (suffix != NULL) {
1566                         const char *ext;
1567
1568                         ext = strrchr(dent->d_name, '.');
1569                         if (ext == NULL)
1570                                 continue;
1571                         if (strcmp(ext, suffix) != 0)
1572                                 continue;
1573                 }
1574                 dbg(udev, "put file '%s/%s' into list\n", dirname, dent->d_name);
1575
1576                 snprintf(filename, sizeof(filename), "%s/%s", dirname, dent->d_name);
1577                 filename[sizeof(filename)-1] = '\0';
1578                 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1579         }
1580
1581         closedir(dir);
1582         return 0;
1583 }
1584
1585 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1586 {
1587         struct udev_rules *rules;
1588         struct stat statbuf;
1589         struct udev_list_node file_list;
1590         struct udev_list_entry *file_loop, *file_tmp;
1591         struct token end_token;
1592
1593         rules = malloc(sizeof(struct udev_rules));
1594         if (rules == NULL)
1595                 return NULL;
1596         memset(rules, 0x00, sizeof(struct udev_rules));
1597         rules->udev = udev;
1598         rules->resolve_names = resolve_names;
1599         udev_list_init(&file_list);
1600
1601         /* init token array and string buffer */
1602         rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1603         if (rules->tokens == NULL)
1604                 return NULL;
1605         rules->token_max = PREALLOC_TOKEN;
1606         rules->buf = malloc(PREALLOC_STRBUF);
1607         if (rules->buf == NULL)
1608                 return NULL;
1609         rules->buf_max = PREALLOC_STRBUF;
1610         /* offset 0 is always '\0' */
1611         rules->buf[0] = '\0';
1612         rules->buf_cur = 1;
1613         dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1614             rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1615
1616         if (udev_get_rules_path(udev) != NULL) {
1617                 /* custom rules location for testing */
1618                 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1619         } else {
1620                 char filename[PATH_MAX];
1621                 struct udev_list_node sort_list;
1622                 struct udev_list_entry *sort_loop, *sort_tmp;
1623
1624                 /* read user/custom rules */
1625                 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1626
1627                 /* read dynamic/temporary rules */
1628                 util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
1629                 util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
1630                 if (stat(filename, &statbuf) != 0) {
1631                         util_create_path(udev, filename);
1632                         udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1633                         mkdir(filename, 0755);
1634                         udev_selinux_resetfscreatecon(udev);
1635                 }
1636                 udev_list_init(&sort_list);
1637                 add_matching_files(udev, &sort_list, filename, ".rules");
1638
1639                 /* read default rules */
1640                 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1641
1642                 /* sort all rules files by basename into list of files */
1643                 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1644                         const char *sort_name = udev_list_entry_get_name(sort_loop);
1645                         const char *sort_base = strrchr(sort_name, '/');
1646
1647                         if (sort_base == NULL)
1648                                 continue;
1649                         /* sort entry into existing list */
1650                         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1651                                 const char *file_name = udev_list_entry_get_name(file_loop);
1652                                 const char *file_base = strrchr(file_name, '/');
1653
1654                                 if (file_base == NULL)
1655                                         continue;
1656                                 if (strcmp(file_base, sort_base) == 0) {
1657                                         info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1658                                              file_name, sort_name);
1659                                         udev_list_entry_delete(sort_loop);
1660                                         sort_loop = NULL;
1661                                         break;
1662                                 }
1663                                 if (strcmp(file_base, sort_base) > 0) {
1664                                         /* found later file, insert before */
1665                                         udev_list_entry_remove(sort_loop);
1666                                         udev_list_entry_insert_before(sort_loop, file_loop);
1667                                         sort_loop = NULL;
1668                                         break;
1669                                 }
1670                         }
1671                         /* current file already handled */
1672                         if (sort_loop == NULL)
1673                                 continue;
1674                         /* no later file, append to end of list */
1675                         udev_list_entry_remove(sort_loop);
1676                         udev_list_entry_append(sort_loop, &file_list);
1677                 }
1678         }
1679
1680         /* add all filenames to the string buffer */
1681         udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1682                 const char *filename = udev_list_entry_get_name(file_loop);
1683                 unsigned int filename_off;
1684
1685                 filename_off = add_string(rules, filename);
1686                 /* the offset in the rule is limited to unsigned short */
1687                 if (filename_off < USHRT_MAX)
1688                         udev_list_entry_set_flag(file_loop, filename_off);
1689         }
1690
1691         /* parse list of files */
1692         udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1693                 const char *filename = udev_list_entry_get_name(file_loop);
1694                 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1695
1696                 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1697                         parse_file(rules, filename, filename_off);
1698                 else
1699                         info(udev, "can not read '%s'\n", filename);
1700                 udev_list_entry_delete(file_loop);
1701         }
1702
1703         memset(&end_token, 0x00, sizeof(struct token));
1704         end_token.type = TK_END;
1705         add_token(rules, &end_token);
1706
1707         /* shrink allocated token and string buffer */
1708         if (rules->token_cur < rules->token_max) {
1709                 struct token *tokens;
1710
1711                 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1712                 if (tokens != NULL || rules->token_cur == 0) {
1713                         rules->tokens = tokens;
1714                         rules->token_max = rules->token_cur;
1715                 }
1716         }
1717         if (rules->buf_cur < rules->buf_max) {
1718                 char *buf;
1719
1720                 buf = realloc(rules->buf, rules->buf_cur);
1721                 if (buf != NULL || rules->buf_cur == 0) {
1722                         rules->buf = buf;
1723                         rules->buf_max = rules->buf_cur;
1724                 }
1725         }
1726         info(udev, "shrunk to %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1727              rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1728
1729         /* cleanup uid/gid cache */
1730         free(rules->uids);
1731         rules->uids = NULL;
1732         rules->uids_cur = 0;
1733         rules->uids_max = 0;
1734         free(rules->gids);
1735         rules->gids = NULL;
1736         rules->gids_cur = 0;
1737         rules->gids_max = 0;
1738
1739         dump_rules(rules);
1740         return rules;
1741 }
1742
1743 void udev_rules_unref(struct udev_rules *rules)
1744 {
1745         if (rules == NULL)
1746                 return;
1747         free(rules->tokens);
1748         free(rules->buf);
1749         free(rules->uids);
1750         free(rules->gids);
1751         free(rules);
1752 }
1753
1754 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1755 {
1756         char *key_value = &rules->buf[token->key.value_off];
1757         char *pos;
1758         int match = 0;
1759
1760         if (val == NULL)
1761                 val = "";
1762
1763         switch (token->key.glob) {
1764         case GL_PLAIN:
1765                 match = (strcmp(key_value, val) == 0);
1766                 break;
1767         case GL_GLOB:
1768                 match = (fnmatch(key_value, val, 0) == 0);
1769                 break;
1770         case GL_SPLIT:
1771                 {
1772                         const char *split;
1773                         size_t len;
1774
1775                         split = &rules->buf[token->key.value_off];
1776                         len = strlen(val);
1777                         while (1) {
1778                                 const char *next;
1779
1780                                 next = strchr(split, '|');
1781                                 if (next != NULL) {
1782                                         size_t matchlen = (size_t)(next - split);
1783
1784                                         match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1785                                         if (match)
1786                                                 break;
1787                                 } else {
1788                                         match = (strcmp(split, val) == 0);
1789                                         break;
1790                                 }
1791                                 split = &next[1];
1792                         }
1793                         break;
1794                 }
1795         case GL_SPLIT_GLOB:
1796                 {
1797                         char value[UTIL_PATH_SIZE];
1798
1799                         util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value));
1800                         key_value = value;
1801                         while (key_value != NULL) {
1802                                 pos = strchr(key_value, '|');
1803                                 if (pos != NULL) {
1804                                         pos[0] = '\0';
1805                                         pos = &pos[1];
1806                                 }
1807                                 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1808                                 match = (fnmatch(key_value, val, 0) == 0);
1809                                 if (match)
1810                                         break;
1811                                 key_value = pos;
1812                         }
1813                         break;
1814                 }
1815         case GL_SOMETHING:
1816                 match = (val[0] != '\0');
1817                 break;
1818         case GL_FORMAT:
1819         case GL_UNSET:
1820                 return -1;
1821         }
1822
1823         if (match && (token->key.op == OP_MATCH)) {
1824                 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1825                 return 0;
1826         }
1827         if (!match && (token->key.op == OP_NOMATCH)) {
1828                 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1829                 return 0;
1830         }
1831         dbg(rules->udev, "%s is not true\n", token_str(token->type));
1832         return -1;
1833 }
1834
1835 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1836 {
1837         const char *key_name = &rules->buf[cur->key.attr_off];
1838         const char *key_value = &rules->buf[cur->key.value_off];
1839         char value[UTIL_NAME_SIZE];
1840         size_t len;
1841
1842         value[0] = '\0';
1843         if (key_name[0] == '[') {
1844                 char attr[UTIL_PATH_SIZE];
1845
1846                 util_strlcpy(attr, key_name, sizeof(attr));
1847                 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
1848         }
1849         if (value[0] == '\0') {
1850                 const char *val;
1851
1852                 val = udev_device_get_sysattr_value(dev, key_name);
1853                 if (val == NULL)
1854                         return -1;
1855                 util_strlcpy(value, val, sizeof(value));
1856         }
1857
1858         /* strip trailing whitespace of value, if not asked to match for it */
1859         len = strlen(key_value);
1860         if (len > 0 && !isspace(key_value[len-1])) {
1861                 len = strlen(value);
1862                 while (len > 0 && isspace(value[--len]))
1863                         value[len] = '\0';
1864                 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1865         }
1866         return match_key(rules, cur, value);
1867 }
1868
1869 enum escape_type {
1870         ESCAPE_UNSET,
1871         ESCAPE_NONE,
1872         ESCAPE_REPLACE,
1873 };
1874
1875 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
1876 {
1877         struct token *cur;
1878         struct token *rule;
1879         enum escape_type esc = ESCAPE_UNSET;
1880         int can_set_name;
1881
1882         if (rules->tokens == NULL)
1883                 return -1;
1884
1885         can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
1886                          strcmp(udev_device_get_action(event->dev), "change") == 0) &&
1887                         (major(udev_device_get_devnum(event->dev)) > 0 ||
1888                          strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
1889
1890         /* loop through token list, match, run actions or forward to next rule */
1891         cur = &rules->tokens[0];
1892         rule = cur;
1893         while (1) {
1894                 dump_token(rules, cur);
1895                 switch (cur->type) {
1896                 case TK_RULE:
1897                         /* current rule */
1898                         rule = cur;
1899                         /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1900                         if (!can_set_name && rule->rule.flags)
1901                                 ;//goto nomatch;
1902                         esc = ESCAPE_UNSET;
1903                         break;
1904                 case TK_M_ACTION:
1905                         if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1906                                 goto nomatch;
1907                         break;
1908                 case TK_M_DEVPATH:
1909                         if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1910                                 goto nomatch;
1911                         break;
1912                 case TK_M_KERNEL:
1913                         if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1914                                 goto nomatch;
1915                         break;
1916                 case TK_M_DEVLINK:
1917                         {
1918                                 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
1919                                 struct udev_list_entry *list_entry;
1920                                 int match = 0;
1921
1922                                 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1923                                         const char *devlink;
1924
1925                                         devlink =  &udev_list_entry_get_name(list_entry)[devlen];
1926                                         if (match_key(rules, cur, devlink) == 0) {
1927                                                 match = 1;
1928                                                 break;
1929                                         }
1930                                 }
1931                                 if (!match)
1932                                         goto nomatch;
1933                                 break;
1934                         }
1935                 case TK_M_NAME:
1936                         if (match_key(rules, cur, event->name) != 0)
1937                                 goto nomatch;
1938                         break;
1939                 case TK_M_ENV:
1940                         {
1941                                 struct udev_list_entry *list_entry;
1942                                 const char *key_name = &rules->buf[cur->key.attr_off];
1943                                 const char *value;
1944
1945                                 list_entry = udev_device_get_properties_list_entry(event->dev);
1946                                 list_entry = udev_list_entry_get_by_name(list_entry, key_name);
1947                                 value = udev_list_entry_get_value(list_entry);
1948                                 if (value == NULL) {
1949                                         dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
1950                                         value = "";
1951                                 }
1952                                 if (match_key(rules, cur, value))
1953                                         goto nomatch;
1954                                 break;
1955                         }
1956                 case TK_M_SUBSYSTEM:
1957                         if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1958                                 goto nomatch;
1959                         break;
1960                 case TK_M_DRIVER:
1961                         if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1962                                 goto nomatch;
1963                         break;
1964                 case TK_M_WAITFOR:
1965                         {
1966                                 char filename[UTIL_PATH_SIZE];
1967                                 int found;
1968
1969                                 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
1970                                 udev_event_apply_format(event, filename, sizeof(filename));
1971                                 found = (wait_for_file(event->dev, filename, 10) == 0);
1972                                 if (!found && (cur->key.op != OP_NOMATCH))
1973                                         goto nomatch;
1974                                 break;
1975                         }
1976                 case TK_M_ATTR:
1977                         if (match_attr(rules, event->dev, event, cur) != 0)
1978                                 goto nomatch;
1979                         break;
1980                 case TK_M_KERNELS:
1981                 case TK_M_SUBSYSTEMS:
1982                 case TK_M_DRIVERS:
1983                 case TK_M_ATTRS:
1984                         {
1985                                 struct token *next;
1986
1987                                 /* get whole sequence of parent matches */
1988                                 next = cur;
1989                                 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
1990                                         next++;
1991
1992                                 /* loop over parents */
1993                                 event->dev_parent = event->dev;
1994                                 while (1) {
1995                                         struct token *key;
1996
1997                                         dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
1998                                         /* loop over sequence of parent match keys */
1999                                         for (key = cur; key < next; key++ ) {
2000                                                 dump_token(rules, key);
2001                                                 switch(key->type) {
2002                                                 case TK_M_KERNELS:
2003                                                         if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2004                                                                 goto try_parent;
2005                                                         break;
2006                                                 case TK_M_SUBSYSTEMS:
2007                                                         if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2008                                                                 goto try_parent;
2009                                                         break;
2010                                                 case TK_M_DRIVERS:
2011                                                         if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2012                                                                 goto try_parent;
2013                                                         break;
2014                                                 case TK_M_ATTRS:
2015                                                         if (match_attr(rules, event->dev_parent, event, key) != 0)
2016                                                                 goto try_parent;
2017                                                         break;
2018                                                 default:
2019                                                         goto nomatch;
2020                                                 }
2021                                                 dbg(event->udev, "parent key matched\n");
2022                                         }
2023                                         dbg(event->udev, "all parent keys matched\n");
2024                                         /* all keys matched */
2025                                         break;
2026
2027                                 try_parent:
2028                                         event->dev_parent = udev_device_get_parent(event->dev_parent);
2029                                         if (event->dev_parent == NULL)
2030                                                 goto nomatch;
2031                                 }
2032                                 /* move behind our sequence of parent match keys */
2033                                 cur = next;
2034                                 continue;
2035                         }
2036                 case TK_M_TEST:
2037                         {
2038                                 char filename[UTIL_PATH_SIZE];
2039                                 struct stat statbuf;
2040                                 int match;
2041
2042                                 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2043                                 udev_event_apply_format(event, filename, sizeof(filename));
2044                                 if (util_resolve_subsys_kernel(event->udev, NULL, filename, sizeof(filename), 0) != 0)
2045                                         if (filename[0] != '/') {
2046                                                 char tmp[UTIL_PATH_SIZE];
2047
2048                                                 util_strlcpy(tmp, udev_device_get_syspath(event->dev), sizeof(tmp));
2049                                                 util_strlcat(tmp, "/", sizeof(tmp));
2050                                                 util_strlcat(tmp, filename, sizeof(tmp));
2051                                                 util_strlcpy(filename, tmp, sizeof(filename));
2052                                         }
2053
2054                                 attr_subst_subdir(filename, sizeof(filename));
2055
2056                                 match = (stat(filename, &statbuf) == 0);
2057                                 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2058                                 if (match && cur->key.mode > 0) {
2059                                         match = ((statbuf.st_mode & cur->key.mode) > 0);
2060                                         dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2061                                             match ? "matches" : "does not match", cur->key.mode);
2062                                 }
2063                                 if (match && cur->key.op == OP_NOMATCH)
2064                                         goto nomatch;
2065                                 if (!match && cur->key.op == OP_MATCH)
2066                                         goto nomatch;
2067                                 break;
2068                         }
2069                 case TK_M_PROGRAM:
2070                         {
2071                                 char program[UTIL_PATH_SIZE];
2072                                 char **envp;
2073                                 char result[UTIL_PATH_SIZE];
2074
2075                                 free(event->program_result);
2076                                 event->program_result = NULL;
2077                                 util_strlcpy(program, &rules->buf[cur->key.value_off], sizeof(program));
2078                                 udev_event_apply_format(event, program, sizeof(program));
2079                                 envp = udev_device_get_properties_envp(event->dev);
2080                                 info(event->udev, "PROGRAM '%s' %s:%u\n",
2081                                      program,
2082                                      &rules->buf[rule->rule.filename_off],
2083                                      rule->rule.filename_line);
2084                                 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2085                                         if (cur->key.op != OP_NOMATCH)
2086                                                 goto nomatch;
2087                                 } else {
2088                                         int count;
2089
2090                                         util_remove_trailing_chars(result, '\n');
2091                                         if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2092                                                 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2093                                                 if (count > 0)
2094                                                         info(event->udev, "%i character(s) replaced\n" , count);
2095                                         }
2096                                         event->program_result = strdup(result);
2097                                         dbg(event->udev, "storing result '%s'\n", event->program_result);
2098                                         if (cur->key.op == OP_NOMATCH)
2099                                                 goto nomatch;
2100                                 }
2101                                 break;
2102                         }
2103                 case TK_M_IMPORT_FILE:
2104                         {
2105                                 char import[UTIL_PATH_SIZE];
2106
2107                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2108                                 udev_event_apply_format(event, import, sizeof(import));
2109                                 if (import_file_into_properties(event->dev, import) != 0)
2110                                         if (cur->key.op != OP_NOMATCH)
2111                                                 goto nomatch;
2112                                 break;
2113                         }
2114                 case TK_M_IMPORT_PROG:
2115                         {
2116                                 char import[UTIL_PATH_SIZE];
2117
2118                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2119                                 udev_event_apply_format(event, import, sizeof(import));
2120                                 info(event->udev, "IMPORT '%s' %s:%u\n",
2121                                      import,
2122                                      &rules->buf[rule->rule.filename_off],
2123                                      rule->rule.filename_line);
2124                                 if (import_program_into_properties(event->dev, import) != 0)
2125                                         if (cur->key.op != OP_NOMATCH)
2126                                                 goto nomatch;
2127                                 break;
2128                         }
2129                 case TK_M_IMPORT_PARENT:
2130                         {
2131                                 char import[UTIL_PATH_SIZE];
2132
2133                                 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2134                                 udev_event_apply_format(event, import, sizeof(import));
2135                                 if (import_parent_into_properties(event->dev, import) != 0)
2136                                         if (cur->key.op != OP_NOMATCH)
2137                                                 goto nomatch;
2138                                 break;
2139                         }
2140                 case TK_M_RESULT:
2141                         if (match_key(rules, cur, event->program_result) != 0)
2142                                 goto nomatch;
2143                         break;
2144
2145                 case TK_A_IGNORE_DEVICE:
2146                         event->ignore_device = 1;
2147                         return 0;
2148                         break;
2149                 case TK_A_STRING_ESCAPE_NONE:
2150                         esc = ESCAPE_NONE;
2151                         break;
2152                 case TK_A_STRING_ESCAPE_REPLACE:
2153                         esc = ESCAPE_REPLACE;
2154                         break;
2155                 case TK_A_NUM_FAKE_PART:
2156                         if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2157                                 break;
2158                         if (udev_device_get_sysnum(event->dev) != NULL)
2159                                 break;
2160                         udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2161                         break;
2162                 case TK_A_DEVLINK_PRIO:
2163                         udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2164                         break;
2165                 case TK_A_OWNER:
2166                         {
2167                                 char owner[UTIL_NAME_SIZE];
2168
2169                                 if (event->owner_final)
2170                                         break;
2171                                 if (cur->key.op == OP_ASSIGN_FINAL)
2172                                         event->owner_final = 1;
2173                                 util_strlcpy(owner,  &rules->buf[cur->key.value_off], sizeof(owner));
2174                                 udev_event_apply_format(event, owner, sizeof(owner));
2175                                 event->uid = util_lookup_user(event->udev, owner);
2176                                 info(event->udev, "OWNER %u %s:%u\n",
2177                                      event->uid,
2178                                      &rules->buf[rule->rule.filename_off],
2179                                      rule->rule.filename_line);
2180                                 break;
2181                         }
2182                 case TK_A_GROUP:
2183                         {
2184                                 char group[UTIL_NAME_SIZE];
2185
2186                                 if (event->group_final)
2187                                         break;
2188                                 if (cur->key.op == OP_ASSIGN_FINAL)
2189                                         event->group_final = 1;
2190                                 util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group));
2191                                 udev_event_apply_format(event, group, sizeof(group));
2192                                 event->gid = util_lookup_group(event->udev, group);
2193                                 info(event->udev, "GROUP %u %s:%u\n",
2194                                      event->gid,
2195                                      &rules->buf[rule->rule.filename_off],
2196                                      rule->rule.filename_line);
2197                                 break;
2198                         }
2199                 case TK_A_MODE:
2200                         {
2201                                 char mode[UTIL_NAME_SIZE];
2202                                 char *endptr;
2203
2204                                 if (event->mode_final)
2205                                         break;
2206                                 if (cur->key.op == OP_ASSIGN_FINAL)
2207                                         event->mode_final = 1;
2208                                 util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode));
2209                                 udev_event_apply_format(event, mode, sizeof(mode));
2210                                 event->mode = strtol(mode, &endptr, 8);
2211                                 if (endptr[0] != '\0') {
2212                                         err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2213                                         event->mode = 0660;
2214                                 }
2215                                 info(event->udev, "MODE %#o %s:%u\n",
2216                                      event->mode,
2217                                      &rules->buf[rule->rule.filename_off],
2218                                      rule->rule.filename_line);
2219                                 break;
2220                         }
2221                 case TK_A_OWNER_ID:
2222                         if (event->owner_final)
2223                                 break;
2224                         if (cur->key.op == OP_ASSIGN_FINAL)
2225                                 event->owner_final = 1;
2226                         event->uid = cur->key.uid;
2227                         info(event->udev, "OWNER %u %s:%u\n",
2228                              event->uid,
2229                              &rules->buf[rule->rule.filename_off],
2230                              rule->rule.filename_line);
2231                         break;
2232                 case TK_A_GROUP_ID:
2233                         if (event->group_final)
2234                                 break;
2235                         if (cur->key.op == OP_ASSIGN_FINAL)
2236                                 event->group_final = 1;
2237                         event->gid = cur->key.gid;
2238                         info(event->udev, "GROUP %u %s:%u\n",
2239                              event->gid,
2240                              &rules->buf[rule->rule.filename_off],
2241                              rule->rule.filename_line);
2242                         break;
2243                 case TK_A_MODE_ID:
2244                         if (event->mode_final)
2245                                 break;
2246                         if (cur->key.op == OP_ASSIGN_FINAL)
2247                                 event->mode_final = 1;
2248                         event->mode = cur->key.mode;
2249                         info(event->udev, "MODE %#o %s:%u\n",
2250                              event->mode,
2251                              &rules->buf[rule->rule.filename_off],
2252                              rule->rule.filename_line);
2253                         break;
2254                 case TK_A_ENV:
2255                         {
2256                                 const char *name = &rules->buf[cur->key.attr_off];
2257                                 char *value = &rules->buf[cur->key.value_off];
2258
2259                                 if (value[0] != '\0') {
2260                                         char temp_value[UTIL_NAME_SIZE];
2261                                         struct udev_list_entry *entry;
2262
2263                                         util_strlcpy(temp_value, value, sizeof(temp_value));
2264                                         udev_event_apply_format(event, temp_value, sizeof(temp_value));
2265                                         entry = udev_device_add_property(event->dev, name, temp_value);
2266                                         /* store in db */
2267                                         udev_list_entry_set_flag(entry, 1);
2268                                 } else {
2269                                         udev_device_add_property(event->dev, name, NULL);
2270                                 }
2271                                 break;
2272                         }
2273                 case TK_A_NAME:
2274                         {
2275                                 const char *name  = &rules->buf[cur->key.value_off];
2276                                 char name_str[UTIL_PATH_SIZE];
2277                                 int count;
2278
2279                                 if (event->name_final)
2280                                         break;
2281                                 if (cur->key.op == OP_ASSIGN_FINAL)
2282                                         event->name_final = 1;
2283                                 if (name[0] == '\0') {
2284                                         free(event->name);
2285                                         event->name = NULL;
2286                                         break;
2287                                 }
2288                                 util_strlcpy(name_str, name, sizeof(name_str));
2289                                 udev_event_apply_format(event, name_str, sizeof(name_str));
2290                                 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2291                                         count = udev_util_replace_chars(name_str, "/");
2292                                         if (count > 0)
2293                                                 info(event->udev, "%i character(s) replaced\n", count);
2294                                         free(event->name);
2295                                         event->name = strdup(name_str);
2296                                         info(event->udev, "NAME '%s' %s:%u\n",
2297                                              event->name,
2298                                              &rules->buf[rule->rule.filename_off],
2299                                              rule->rule.filename_line);
2300                                 }
2301                                 break;
2302                         }
2303                 case TK_A_DEVLINK:
2304                         {
2305                                 char temp[UTIL_PATH_SIZE];
2306                                 char filename[UTIL_PATH_SIZE];
2307                                 char *pos, *next;
2308                                 int count = 0;
2309
2310                                 if (event->devlink_final)
2311                                         break;
2312                                 if (major(udev_device_get_devnum(event->dev)) == 0)
2313                                         break;
2314                                 if (cur->key.op == OP_ASSIGN_FINAL)
2315                                         event->devlink_final = 1;
2316                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2317                                         udev_device_cleanup_devlinks_list(event->dev);
2318
2319                                 /* allow  multiple symlinks separated by spaces */
2320                                 util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));
2321                                 udev_event_apply_format(event, temp, sizeof(temp));
2322                                 if (esc == ESCAPE_UNSET)
2323                                         count = udev_util_replace_chars(temp, "/ ");
2324                                 else if (esc == ESCAPE_REPLACE)
2325                                         count = udev_util_replace_chars(temp, "/");
2326                                 if (count > 0)
2327                                         info(event->udev, "%i character(s) replaced\n" , count);
2328                                 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2329                                 pos = temp;
2330                                 while (isspace(pos[0]))
2331                                         pos++;
2332                                 next = strchr(pos, ' ');
2333                                 while (next) {
2334                                         next[0] = '\0';
2335                                         info(event->udev, "LINK '%s' %s:%u\n",
2336                                              pos,
2337                                              &rules->buf[rule->rule.filename_off],
2338                                              rule->rule.filename_line);
2339                                         util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2340                                         util_strlcat(filename, "/", sizeof(filename));
2341                                         util_strlcat(filename, pos, sizeof(filename));
2342                                         udev_device_add_devlink(event->dev, filename);
2343                                         while (isspace(next[1]))
2344                                                 next++;
2345                                         pos = &next[1];
2346                                         next = strchr(pos, ' ');
2347                                 }
2348                                 if (pos[0] != '\0') {
2349                                         info(event->udev, "LINK '%s' %s:%u\n",
2350                                              pos,
2351                                              &rules->buf[rule->rule.filename_off],
2352                                              rule->rule.filename_line);
2353                                         util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2354                                         util_strlcat(filename, "/", sizeof(filename));
2355                                         util_strlcat(filename, pos, sizeof(filename));
2356                                         udev_device_add_devlink(event->dev, filename);
2357                                 }
2358                         }
2359                         break;
2360                 case TK_A_EVENT_TIMEOUT:
2361                         udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2362                         break;
2363                 case TK_A_IGNORE_REMOVE:
2364                         udev_device_set_ignore_remove(event->dev, 1);
2365                         break;
2366                 case TK_A_ATTR:
2367                         {
2368                                 const char *key_name = &rules->buf[cur->key.attr_off];
2369                                 char attr[UTIL_PATH_SIZE];
2370                                 char value[UTIL_NAME_SIZE];
2371                                 FILE *f;
2372
2373                                 util_strlcpy(attr, key_name, sizeof(attr));
2374                                 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) {
2375                                         util_strlcpy(attr, udev_device_get_syspath(event->dev), sizeof(attr));
2376                                         util_strlcat(attr, "/", sizeof(attr));
2377                                         util_strlcat(attr, key_name, sizeof(attr));
2378                                 }
2379
2380                                 attr_subst_subdir(attr, sizeof(attr));
2381
2382                                 util_strlcpy(value, &rules->buf[cur->key.value_off], sizeof(value));
2383                                 udev_event_apply_format(event, value, sizeof(value));
2384                                 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2385                                      &rules->buf[rule->rule.filename_off],
2386                                      rule->rule.filename_line);
2387                                 f = fopen(attr, "w");
2388                                 if (f != NULL) {
2389                                         if (!event->test)
2390                                                 if (fprintf(f, "%s", value) <= 0)
2391                                                         err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2392                                         fclose(f);
2393                                 } else {
2394                                         err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2395                                 }
2396                                 break;
2397                         }
2398                 case TK_A_RUN:
2399                         {
2400                                 struct udev_list_entry *list_entry;
2401
2402                                 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2403                                         udev_list_cleanup_entries(event->udev, &event->run_list);
2404                                 info(event->udev, "RUN '%s' %s:%u\n",
2405                                      &rules->buf[cur->key.value_off],
2406                                      &rules->buf[rule->rule.filename_off],
2407                                      rule->rule.filename_line);
2408                                 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2409                                                                  &rules->buf[cur->key.value_off], NULL, 1, 0);
2410                                 if (cur->key.ignore_error)
2411                                         udev_list_entry_set_flag(list_entry, 1);
2412                                 break;
2413                         }
2414                 case TK_A_GOTO:
2415                         cur = &rules->tokens[cur->key.rule_goto];
2416                         continue;
2417                 case TK_A_LAST_RULE:
2418                 case TK_END:
2419                         return 0;
2420
2421                 case TK_M_PARENTS_MIN:
2422                 case TK_M_PARENTS_MAX:
2423                 case TK_M_MAX:
2424                 case TK_UNSET:
2425                         err(rules->udev, "wrong type %u\n", cur->type);
2426                         goto nomatch;
2427                 }
2428
2429                 cur++;
2430                 continue;
2431         nomatch:
2432                 /* fast-forward to next rule */
2433                 cur = rule + rule->rule.token_count;
2434                 dbg(rules->udev, "forward to rule: %u\n",
2435                                  (unsigned int) (cur - rules->tokens));
2436         }
2437 }