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