src/udev/udev-rules.c

   1 /*
   2  * Copyright (C) 2003-2010 Kay Sievers <kay.sievers@vrfy.org>
   3  * Copyright (C) 2008 Alan Jenkins <alan-jenkins@tuffmail.co.uk>
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <stddef.h>
  20 #include <limits.h>
  21 #include <stdlib.h>
  22 #include <stdbool.h>
  23 #include <string.h>
  24 #include <stdio.h>
  25 #include <fcntl.h>
  26 #include <ctype.h>
  27 #include <unistd.h>
  28 #include <errno.h>
  29 #include <dirent.h>
  30 #include <fnmatch.h>
  31 #include <time.h>
  32
  33 #include "udev.h"
  34 #include "conf-files.h"
  35
  36 #define PREALLOC_TOKEN          2048
  37 #define PREALLOC_STRBUF         32 * 1024
  38 #define PREALLOC_TRIE           256
  39
  40 struct uid_gid {
  41         unsigned int name_off;
  42         union {
  43                 uid_t uid;
  44                 gid_t gid;
  45         };
  46 };
  47
  48 struct trie_node {
  49         /* this node's first child */
  50         unsigned int child_idx;
  51         /* the next child of our parent node's child list */
  52         unsigned int next_child_idx;
  53         /* this node's last child (shortcut for append) */
  54         unsigned int last_child_idx;
  55         unsigned int value_off;
  56         unsigned short value_len;
  57         unsigned char key;
  58 };
  59
  60 struct udev_rules {
  61         struct udev *udev;
  62         char **dirs;
  63         unsigned long long *dirs_ts_usec;
  64         int resolve_names;
  65
  66         /* every key in the rules file becomes a token */
  67         struct token *tokens;
  68         unsigned int token_cur;
  69         unsigned int token_max;
  70
  71         /* all key strings are copied to a single string buffer */
  72         char *buf;
  73         size_t buf_cur;
  74         size_t buf_max;
  75         unsigned int buf_count;
  76
  77         /* during rule parsing, strings are indexed and de-duplicated */
  78         struct trie_node *trie_nodes;
  79         unsigned int trie_nodes_cur;
  80         unsigned int trie_nodes_max;
  81
  82         /* during rule parsing, uid/gid lookup results are cached */
  83         struct uid_gid *uids;
  84         unsigned int uids_cur;
  85         unsigned int uids_max;
  86         struct uid_gid *gids;
  87         unsigned int gids_cur;
  88         unsigned int gids_max;
  89 };
  90
  91 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
  92 enum operation_type {
  93         OP_UNSET,
  94
  95         OP_MATCH,
  96         OP_NOMATCH,
  97         OP_MATCH_MAX,
  98
  99         OP_ADD,
 100         OP_ASSIGN,
 101         OP_ASSIGN_FINAL,
 102 };
 103
 104 enum string_glob_type {
 105         GL_UNSET,
 106         GL_PLAIN,                       /* no special chars */
 107         GL_GLOB,                        /* shell globs ?,*,[] */
 108         GL_SPLIT,                       /* multi-value A|B */
 109         GL_SPLIT_GLOB,                  /* multi-value with glob A*|B* */
 110         GL_SOMETHING,                   /* commonly used "?*" */
 111 };
 112
 113 enum string_subst_type {
 114         SB_UNSET,
 115         SB_NONE,
 116         SB_FORMAT,
 117         SB_SUBSYS,
 118 };
 119
 120 /* tokens of a rule are sorted/handled in this order */
 121 enum token_type {
 122         TK_UNSET,
 123         TK_RULE,
 124
 125         TK_M_ACTION,                    /* val */
 126         TK_M_DEVPATH,                   /* val */
 127         TK_M_KERNEL,                    /* val */
 128         TK_M_DEVLINK,                   /* val */
 129         TK_M_NAME,                      /* val */
 130         TK_M_ENV,                       /* val, attr */
 131         TK_M_TAG,                       /* val */
 132         TK_M_SUBSYSTEM,                 /* val */
 133         TK_M_DRIVER,                    /* val */
 134         TK_M_WAITFOR,                   /* val */
 135         TK_M_ATTR,                      /* val, attr */
 136
 137         TK_M_PARENTS_MIN,
 138         TK_M_KERNELS,                   /* val */
 139         TK_M_SUBSYSTEMS,                /* val */
 140         TK_M_DRIVERS,                   /* val */
 141         TK_M_ATTRS,                     /* val, attr */
 142         TK_M_TAGS,                      /* val */
 143         TK_M_PARENTS_MAX,
 144
 145         TK_M_TEST,                      /* val, mode_t */
 146         TK_M_EVENT_TIMEOUT,             /* int */
 147         TK_M_PROGRAM,                   /* val */
 148         TK_M_IMPORT_FILE,               /* val */
 149         TK_M_IMPORT_PROG,               /* val */
 150         TK_M_IMPORT_BUILTIN,            /* val */
 151         TK_M_IMPORT_DB,                 /* val */
 152         TK_M_IMPORT_CMDLINE,            /* val */
 153         TK_M_IMPORT_PARENT,             /* val */
 154         TK_M_RESULT,                    /* val */
 155         TK_M_MAX,
 156
 157         TK_A_STRING_ESCAPE_NONE,
 158         TK_A_STRING_ESCAPE_REPLACE,
 159         TK_A_DB_PERSIST,
 160         TK_A_INOTIFY_WATCH,             /* int */
 161         TK_A_DEVLINK_PRIO,              /* int */
 162         TK_A_OWNER,                     /* val */
 163         TK_A_GROUP,                     /* val */
 164         TK_A_MODE,                      /* val */
 165         TK_A_OWNER_ID,                  /* uid_t */
 166         TK_A_GROUP_ID,                  /* gid_t */
 167         TK_A_MODE_ID,                   /* mode_t */
 168         TK_A_STATIC_NODE,               /* val */
 169         TK_A_ENV,                       /* val, attr */
 170         TK_A_TAG,                       /* val */
 171         TK_A_NAME,                      /* val */
 172         TK_A_DEVLINK,                   /* val */
 173         TK_A_ATTR,                      /* val, attr */
 174         TK_A_RUN_BUILTIN,               /* val, bool */
 175         TK_A_RUN_PROGRAM,               /* val, bool */
 176         TK_A_GOTO,                      /* size_t */
 177
 178         TK_END,
 179 };
 180
 181 /* we try to pack stuff in a way that we take only 12 bytes per token */
 182 struct token {
 183         union {
 184                 unsigned char type;                /* same in rule and key */
 185                 struct {
 186                         enum token_type type:8;
 187                         bool can_set_name:1;
 188                         bool has_static_node:1;
 189                         unsigned int unused:6;
 190                         unsigned short token_count;
 191                         unsigned int label_off;
 192                         unsigned short filename_off;
 193                         unsigned short filename_line;
 194                 } rule;
 195                 struct {
 196                         enum token_type type:8;
 197                         enum operation_type op:8;
 198                         enum string_glob_type glob:8;
 199                         enum string_subst_type subst:4;
 200                         enum string_subst_type attrsubst:4;
 201                         unsigned int value_off;
 202                         union {
 203                                 unsigned int attr_off;
 204                                 int devlink_unique;
 205                                 unsigned int rule_goto;
 206                                 mode_t  mode;
 207                                 uid_t uid;
 208                                 gid_t gid;
 209                                 int devlink_prio;
 210                                 int event_timeout;
 211                                 int watch;
 212                                 enum udev_builtin_cmd builtin_cmd;
 213                         };
 214                 } key;
 215         };
 216 };
 217
 218 #define MAX_TK                64
 219 struct rule_tmp {
 220         struct udev_rules *rules;
 221         struct token rule;
 222         struct token token[MAX_TK];
 223         unsigned int token_cur;
 224 };
 225
 226 #ifdef DEBUG
 227 static const char *operation_str(enum operation_type type)
 228 {
 229         static const char *operation_strs[] = {
 230                 [OP_UNSET] =            "UNSET",
 231                 [OP_MATCH] =            "match",
 232                 [OP_NOMATCH] =          "nomatch",
 233                 [OP_MATCH_MAX] =        "MATCH_MAX",
 234
 235                 [OP_ADD] =              "add",
 236                 [OP_ASSIGN] =           "assign",
 237                 [OP_ASSIGN_FINAL] =     "assign-final",
 238 }        ;
 239
 240         return operation_strs[type];
 241 }
 242
 243 static const char *string_glob_str(enum string_glob_type type)
 244 {
 245         static const char *string_glob_strs[] = {
 246                 [GL_UNSET] =            "UNSET",
 247                 [GL_PLAIN] =            "plain",
 248                 [GL_GLOB] =             "glob",
 249                 [GL_SPLIT] =            "split",
 250                 [GL_SPLIT_GLOB] =       "split-glob",
 251                 [GL_SOMETHING] =        "split-glob",
 252         };
 253
 254         return string_glob_strs[type];
 255 }
 256
 257 static const char *token_str(enum token_type type)
 258 {
 259         static const char *token_strs[] = {
 260                 [TK_UNSET] =                    "UNSET",
 261                 [TK_RULE] =                     "RULE",
 262
 263                 [TK_M_ACTION] =                 "M ACTION",
 264                 [TK_M_DEVPATH] =                "M DEVPATH",
 265                 [TK_M_KERNEL] =                 "M KERNEL",
 266                 [TK_M_DEVLINK] =                "M DEVLINK",
 267                 [TK_M_NAME] =                   "M NAME",
 268                 [TK_M_ENV] =                    "M ENV",
 269                 [TK_M_TAG] =                    "M TAG",
 270                 [TK_M_SUBSYSTEM] =              "M SUBSYSTEM",
 271                 [TK_M_DRIVER] =                 "M DRIVER",
 272                 [TK_M_WAITFOR] =                "M WAITFOR",
 273                 [TK_M_ATTR] =                   "M ATTR",
 274
 275                 [TK_M_PARENTS_MIN] =            "M PARENTS_MIN",
 276                 [TK_M_KERNELS] =                "M KERNELS",
 277                 [TK_M_SUBSYSTEMS] =             "M SUBSYSTEMS",
 278                 [TK_M_DRIVERS] =                "M DRIVERS",
 279                 [TK_M_ATTRS] =                  "M ATTRS",
 280                 [TK_M_TAGS] =                   "M TAGS",
 281                 [TK_M_PARENTS_MAX] =            "M PARENTS_MAX",
 282
 283                 [TK_M_TEST] =                   "M TEST",
 284                 [TK_M_EVENT_TIMEOUT] =          "M EVENT_TIMEOUT",
 285                 [TK_M_PROGRAM] =                "M PROGRAM",
 286                 [TK_M_IMPORT_FILE] =            "M IMPORT_FILE",
 287                 [TK_M_IMPORT_PROG] =            "M IMPORT_PROG",
 288                 [TK_M_IMPORT_BUILTIN] =         "M IMPORT_BUILTIN",
 289                 [TK_M_IMPORT_DB] =              "M IMPORT_DB",
 290                 [TK_M_IMPORT_CMDLINE] =         "M IMPORT_CMDLINE",
 291                 [TK_M_IMPORT_PARENT] =          "M IMPORT_PARENT",
 292                 [TK_M_RESULT] =                 "M RESULT",
 293                 [TK_M_MAX] =                    "M MAX",
 294
 295                 [TK_A_STRING_ESCAPE_NONE] =     "A STRING_ESCAPE_NONE",
 296                 [TK_A_STRING_ESCAPE_REPLACE] =  "A STRING_ESCAPE_REPLACE",
 297                 [TK_A_DB_PERSIST] =             "A DB_PERSIST",
 298                 [TK_A_INOTIFY_WATCH] =          "A INOTIFY_WATCH",
 299                 [TK_A_DEVLINK_PRIO] =           "A DEVLINK_PRIO",
 300                 [TK_A_OWNER] =                  "A OWNER",
 301                 [TK_A_GROUP] =                  "A GROUP",
 302                 [TK_A_MODE] =                   "A MODE",
 303                 [TK_A_OWNER_ID] =               "A OWNER_ID",
 304                 [TK_A_GROUP_ID] =               "A GROUP_ID",
 305                 [TK_A_STATIC_NODE] =            "A STATIC_NODE",
 306                 [TK_A_MODE_ID] =                "A MODE_ID",
 307                 [TK_A_ENV] =                    "A ENV",
 308                 [TK_A_TAG] =                    "A ENV",
 309                 [TK_A_NAME] =                   "A NAME",
 310                 [TK_A_DEVLINK] =                "A DEVLINK",
 311                 [TK_A_ATTR] =                   "A ATTR",
 312                 [TK_A_RUN_BUILTIN] =            "A RUN_BUILTIN",
 313                 [TK_A_RUN_PROGRAM] =            "A RUN_PROGRAM",
 314                 [TK_A_GOTO] =                   "A GOTO",
 315
 316                 [TK_END] =                      "END",
 317         };
 318
 319         return token_strs[type];
 320 }
 321
 322 static void dump_token(struct udev_rules *rules, struct token *token)
 323 {
 324         enum token_type type = token->type;
 325         enum operation_type op = token->key.op;
 326         enum string_glob_type glob = token->key.glob;
 327         const char *value = &rules->buf[token->key.value_off];
 328         const char *attr = &rules->buf[token->key.attr_off];
 329
 330         switch (type) {
 331         case TK_RULE:
 332                 {
 333                         const char *tks_ptr = (char *)rules->tokens;
 334                         const char *tk_ptr = (char *)token;
 335                         unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
 336
 337                         log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'\n",
 338                                   &rules->buf[token->rule.filename_off], token->rule.filename_line,
 339                                   idx, token->rule.token_count,
 340                                   &rules->buf[token->rule.label_off]);
 341                         break;
 342                 }
 343         case TK_M_ACTION:
 344         case TK_M_DEVPATH:
 345         case TK_M_KERNEL:
 346         case TK_M_SUBSYSTEM:
 347         case TK_M_DRIVER:
 348         case TK_M_WAITFOR:
 349         case TK_M_DEVLINK:
 350         case TK_M_NAME:
 351         case TK_M_KERNELS:
 352         case TK_M_SUBSYSTEMS:
 353         case TK_M_DRIVERS:
 354         case TK_M_TAGS:
 355         case TK_M_PROGRAM:
 356         case TK_M_IMPORT_FILE:
 357         case TK_M_IMPORT_PROG:
 358         case TK_M_IMPORT_DB:
 359         case TK_M_IMPORT_CMDLINE:
 360         case TK_M_IMPORT_PARENT:
 361         case TK_M_RESULT:
 362         case TK_A_NAME:
 363         case TK_A_DEVLINK:
 364         case TK_A_OWNER:
 365         case TK_A_GROUP:
 366         case TK_A_MODE:
 367         case TK_A_RUN_BUILTIN:
 368         case TK_A_RUN_PROGRAM:
 369                 log_debug("%s %s '%s'(%s)\n",
 370                           token_str(type), operation_str(op), value, string_glob_str(glob));
 371                 break;
 372         case TK_M_IMPORT_BUILTIN:
 373                 log_debug("%s %i '%s'\n", token_str(type), token->key.builtin_cmd, value);
 374                 break;
 375         case TK_M_ATTR:
 376         case TK_M_ATTRS:
 377         case TK_M_ENV:
 378         case TK_A_ATTR:
 379         case TK_A_ENV:
 380                 log_debug("%s %s '%s' '%s'(%s)\n",
 381                           token_str(type), operation_str(op), attr, value, string_glob_str(glob));
 382                 break;
 383         case TK_M_TAG:
 384         case TK_A_TAG:
 385                 log_debug("%s %s '%s'\n", token_str(type), operation_str(op), value);
 386                 break;
 387         case TK_A_STRING_ESCAPE_NONE:
 388         case TK_A_STRING_ESCAPE_REPLACE:
 389         case TK_A_DB_PERSIST:
 390                 log_debug("%s\n", token_str(type));
 391                 break;
 392         case TK_M_TEST:
 393                 log_debug("%s %s '%s'(%s) %#o\n",
 394                           token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
 395                 break;
 396         case TK_A_INOTIFY_WATCH:
 397                 log_debug("%s %u\n", token_str(type), token->key.watch);
 398                 break;
 399         case TK_A_DEVLINK_PRIO:
 400                 log_debug("%s %u\n", token_str(type), token->key.devlink_prio);
 401                 break;
 402         case TK_A_OWNER_ID:
 403                 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
 404                 break;
 405         case TK_A_GROUP_ID:
 406                 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
 407                 break;
 408         case TK_A_MODE_ID:
 409                 log_debug("%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
 410                 break;
 411         case TK_A_STATIC_NODE:
 412                 log_debug("%s '%s'\n", token_str(type), value);
 413                 break;
 414         case TK_M_EVENT_TIMEOUT:
 415                 log_debug("%s %u\n", token_str(type), token->key.event_timeout);
 416                 break;
 417         case TK_A_GOTO:
 418                 log_debug("%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
 419                 break;
 420         case TK_END:
 421                 log_debug("* %s\n", token_str(type));
 422                 break;
 423         case TK_M_PARENTS_MIN:
 424         case TK_M_PARENTS_MAX:
 425         case TK_M_MAX:
 426         case TK_UNSET:
 427                 log_debug("unknown type %u\n", type);
 428                 break;
 429         }
 430 }
 431
 432 static void dump_rules(struct udev_rules *rules)
 433 {
 434         unsigned int i;
 435
 436         log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
 437                   rules->token_cur,
 438                   rules->token_cur * sizeof(struct token),
 439                   rules->buf_count,
 440                   rules->buf_cur);
 441         for(i = 0; i < rules->token_cur; i++)
 442                 dump_token(rules, &rules->tokens[i]);
 443 }
 444 #else
 445 static inline const char *operation_str(enum operation_type type) { return NULL; }
 446 static inline const char *token_str(enum token_type type) { return NULL; }
 447 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
 448 static inline void dump_rules(struct udev_rules *rules) {}
 449 #endif /* DEBUG */
 450
 451 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
 452 {
 453         int off;
 454
 455         /* grow buffer if needed */
 456         if (rules->buf_cur + bytes+1 >= rules->buf_max) {
 457                 char *buf;
 458                 unsigned int add;
 459
 460                 /* double the buffer size */
 461                 add = rules->buf_max;
 462                 if (add < bytes * 8)
 463                         add = bytes * 8;
 464
 465                 buf = realloc(rules->buf, rules->buf_max + add);
 466                 if (buf == NULL)
 467                         return -1;
 468                 rules->buf = buf;
 469                 rules->buf_max += add;
 470         }
 471         off = rules->buf_cur;
 472         memcpy(&rules->buf[rules->buf_cur], str, bytes);
 473         rules->buf_cur += bytes;
 474         rules->buf_count++;
 475         return off;
 476 }
 477
 478 static int add_string(struct udev_rules *rules, const char *str)
 479 {
 480         unsigned int node_idx;
 481         struct trie_node *new_node;
 482         unsigned int new_node_idx;
 483         unsigned char key;
 484         unsigned short len;
 485         unsigned int depth;
 486         unsigned int off;
 487         struct trie_node *parent;
 488
 489         /* walk trie, start from last character of str to find matching tails */
 490         len = strlen(str);
 491         key = str[len-1];
 492         node_idx = 0;
 493         for (depth = 0; depth <= len; depth++) {
 494                 struct trie_node *node;
 495                 unsigned int child_idx;
 496
 497                 node = &rules->trie_nodes[node_idx];
 498                 off = node->value_off + node->value_len - len;
 499
 500                 /* match against current node */
 501                 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
 502                         return off;
 503
 504                 /* lookup child node */
 505                 key = str[len - 1 - depth];
 506                 child_idx = node->child_idx;
 507                 while (child_idx > 0) {
 508                         struct trie_node *child;
 509
 510                         child = &rules->trie_nodes[child_idx];
 511                         if (child->key == key)
 512                                 break;
 513                         child_idx = child->next_child_idx;
 514                 }
 515                 if (child_idx == 0)
 516                         break;
 517                 node_idx = child_idx;
 518         }
 519
 520         /* string not found, add it */
 521         off = add_new_string(rules, str, len + 1);
 522
 523         /* grow trie nodes if needed */
 524         if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
 525                 struct trie_node *nodes;
 526                 unsigned int add;
 527
 528                 /* double the buffer size */
 529                 add = rules->trie_nodes_max;
 530                 if (add < 8)
 531                         add = 8;
 532
 533                 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
 534                 if (nodes == NULL)
 535                         return -1;
 536                 rules->trie_nodes = nodes;
 537                 rules->trie_nodes_max += add;
 538         }
 539
 540         /* get a new node */
 541         new_node_idx = rules->trie_nodes_cur;
 542         rules->trie_nodes_cur++;
 543         new_node = &rules->trie_nodes[new_node_idx];
 544         memset(new_node, 0x00, sizeof(struct trie_node));
 545         new_node->value_off = off;
 546         new_node->value_len = len;
 547         new_node->key = key;
 548
 549         /* join the parent's child list */
 550         parent = &rules->trie_nodes[node_idx];
 551         if (parent->child_idx == 0) {
 552                 parent->child_idx = new_node_idx;
 553         } else {
 554                 struct trie_node *last_child;
 555
 556                 last_child = &rules->trie_nodes[parent->last_child_idx];
 557                 last_child->next_child_idx = new_node_idx;
 558         }
 559         parent->last_child_idx = new_node_idx;
 560         return off;
 561 }
 562
 563 static int add_token(struct udev_rules *rules, struct token *token)
 564 {
 565         /* grow buffer if needed */
 566         if (rules->token_cur+1 >= rules->token_max) {
 567                 struct token *tokens;
 568                 unsigned int add;
 569
 570                 /* double the buffer size */
 571                 add = rules->token_max;
 572                 if (add < 8)
 573                         add = 8;
 574
 575                 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
 576                 if (tokens == NULL)
 577                         return -1;
 578                 rules->tokens = tokens;
 579                 rules->token_max += add;
 580         }
 581         memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
 582         rules->token_cur++;
 583         return 0;
 584 }
 585
 586 static uid_t add_uid(struct udev_rules *rules, const char *owner)
 587 {
 588         unsigned int i;
 589         uid_t uid;
 590         unsigned int off;
 591
 592         /* lookup, if we know it already */
 593         for (i = 0; i < rules->uids_cur; i++) {
 594                 off = rules->uids[i].name_off;
 595                 if (streq(&rules->buf[off], owner)) {
 596                         uid = rules->uids[i].uid;
 597                         return uid;
 598                 }
 599         }
 600         uid = util_lookup_user(rules->udev, owner);
 601
 602         /* grow buffer if needed */
 603         if (rules->uids_cur+1 >= rules->uids_max) {
 604                 struct uid_gid *uids;
 605                 unsigned int add;
 606
 607                 /* double the buffer size */
 608                 add = rules->uids_max;
 609                 if (add < 1)
 610                         add = 8;
 611
 612                 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
 613                 if (uids == NULL)
 614                         return uid;
 615                 rules->uids = uids;
 616                 rules->uids_max += add;
 617         }
 618         rules->uids[rules->uids_cur].uid = uid;
 619         off = add_string(rules, owner);
 620         if (off <= 0)
 621                 return uid;
 622         rules->uids[rules->uids_cur].name_off = off;
 623         rules->uids_cur++;
 624         return uid;
 625 }
 626
 627 static gid_t add_gid(struct udev_rules *rules, const char *group)
 628 {
 629         unsigned int i;
 630         gid_t gid;
 631         unsigned int off;
 632
 633         /* lookup, if we know it already */
 634         for (i = 0; i < rules->gids_cur; i++) {
 635                 off = rules->gids[i].name_off;
 636                 if (streq(&rules->buf[off], group)) {
 637                         gid = rules->gids[i].gid;
 638                         return gid;
 639                 }
 640         }
 641         gid = util_lookup_group(rules->udev, group);
 642
 643         /* grow buffer if needed */
 644         if (rules->gids_cur+1 >= rules->gids_max) {
 645                 struct uid_gid *gids;
 646                 unsigned int add;
 647
 648                 /* double the buffer size */
 649                 add = rules->gids_max;
 650                 if (add < 1)
 651                         add = 8;
 652
 653                 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
 654                 if (gids == NULL)
 655                         return gid;
 656                 rules->gids = gids;
 657                 rules->gids_max += add;
 658         }
 659         rules->gids[rules->gids_cur].gid = gid;
 660         off = add_string(rules, group);
 661         if (off <= 0)
 662                 return gid;
 663         rules->gids[rules->gids_cur].name_off = off;
 664         rules->gids_cur++;
 665         return gid;
 666 }
 667
 668 static int import_property_from_string(struct udev_device *dev, char *line)
 669 {
 670         char *key;
 671         char *val;
 672         size_t len;
 673
 674         /* find key */
 675         key = line;
 676         while (isspace(key[0]))
 677                 key++;
 678
 679         /* comment or empty line */
 680         if (key[0] == '#' || key[0] == '\0')
 681                 return -1;
 682
 683         /* split key/value */
 684         val = strchr(key, '=');
 685         if (val == NULL)
 686                 return -1;
 687         val[0] = '\0';
 688         val++;
 689
 690         /* find value */
 691         while (isspace(val[0]))
 692                 val++;
 693
 694         /* terminate key */
 695         len = strlen(key);
 696         if (len == 0)
 697                 return -1;
 698         while (isspace(key[len-1]))
 699                 len--;
 700         key[len] = '\0';
 701
 702         /* terminate value */
 703         len = strlen(val);
 704         if (len == 0)
 705                 return -1;
 706         while (isspace(val[len-1]))
 707                 len--;
 708         val[len] = '\0';
 709
 710         if (len == 0)
 711                 return -1;
 712
 713         /* unquote */
 714         if (val[0] == '"' || val[0] == '\'') {
 715                 if (val[len-1] != val[0]) {
 716                         log_debug("inconsistent quoting: '%s', skip\n", line);
 717                         return -1;
 718                 }
 719                 val[len-1] = '\0';
 720                 val++;
 721         }
 722
 723         /* handle device, renamed by external tool, returning new path */
 724         if (streq(key, "DEVPATH")) {
 725                 char syspath[UTIL_PATH_SIZE];
 726
 727                 log_debug("updating devpath from '%s' to '%s'\n",
 728                           udev_device_get_devpath(dev), val);
 729                 util_strscpyl(syspath, sizeof(syspath), "/sys", val, NULL);
 730                 udev_device_set_syspath(dev, syspath);
 731         } else {
 732                 struct udev_list_entry *entry;
 733
 734                 entry = udev_device_add_property(dev, key, val);
 735                 /* store in db, skip private keys */
 736                 if (key[0] != '.')
 737                         udev_list_entry_set_num(entry, true);
 738         }
 739         return 0;
 740 }
 741
 742 static int import_file_into_properties(struct udev_device *dev, const char *filename)
 743 {
 744         FILE *f;
 745         char line[UTIL_LINE_SIZE];
 746
 747         f = fopen(filename, "r");
 748         if (f == NULL)
 749                 return -1;
 750         while (fgets(line, sizeof(line), f) != NULL)
 751                 import_property_from_string(dev, line);
 752         fclose(f);
 753         return 0;
 754 }
 755
 756 static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask)
 757 {
 758         struct udev_device *dev = event->dev;
 759         char **envp;
 760         char result[UTIL_LINE_SIZE];
 761         char *line;
 762         int err;
 763
 764         envp = udev_device_get_properties_envp(dev);
 765         err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result));
 766         if (err < 0)
 767                 return err;
 768
 769         line = result;
 770         while (line != NULL) {
 771                 char *pos;
 772
 773                 pos = strchr(line, '\n');
 774                 if (pos != NULL) {
 775                         pos[0] = '\0';
 776                         pos = &pos[1];
 777                 }
 778                 import_property_from_string(dev, line);
 779                 line = pos;
 780         }
 781         return 0;
 782 }
 783
 784 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
 785 {
 786         struct udev_device *dev_parent;
 787         struct udev_list_entry *list_entry;
 788
 789         dev_parent = udev_device_get_parent(dev);
 790         if (dev_parent == NULL)
 791                 return -1;
 792
 793         udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
 794                 const char *key = udev_list_entry_get_name(list_entry);
 795                 const char *val = udev_list_entry_get_value(list_entry);
 796
 797                 if (fnmatch(filter, key, 0) == 0) {
 798                         struct udev_list_entry *entry;
 799
 800                         entry = udev_device_add_property(dev, key, val);
 801                         /* store in db, skip private keys */
 802                         if (key[0] != '.')
 803                                 udev_list_entry_set_num(entry, true);
 804                 }
 805         }
 806         return 0;
 807 }
 808
 809 #define WAIT_LOOP_PER_SECOND                50
 810 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
 811 {
 812         char filepath[UTIL_PATH_SIZE];
 813         char devicepath[UTIL_PATH_SIZE];
 814         struct stat stats;
 815         int loop = timeout * WAIT_LOOP_PER_SECOND;
 816
 817         /* a relative path is a device attribute */
 818         devicepath[0] = '\0';
 819         if (file[0] != '/') {
 820                 util_strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL);
 821                 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
 822                 file = filepath;
 823         }
 824
 825         while (--loop) {
 826                 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
 827
 828                 /* lookup file */
 829                 if (stat(file, &stats) == 0) {
 830                         log_debug("file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
 831                         return 0;
 832                 }
 833                 /* make sure, the device did not disappear in the meantime */
 834                 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
 835                         log_debug("device disappeared while waiting for '%s'\n", file);
 836                         return -2;
 837                 }
 838                 log_debug("wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
 839                 nanosleep(&duration, NULL);
 840         }
 841         log_debug("waiting for '%s' failed\n", file);
 842         return -1;
 843 }
 844
 845 static int attr_subst_subdir(char *attr, size_t len)
 846 {
 847         bool found = false;
 848
 849         if (strstr(attr, "/*/")) {
 850                 char *pos;
 851                 char dirname[UTIL_PATH_SIZE];
 852                 const char *tail;
 853                 DIR *dir;
 854
 855                 util_strscpy(dirname, sizeof(dirname), attr);
 856                 pos = strstr(dirname, "/*/");
 857                 if (pos == NULL)
 858                         return -1;
 859                 pos[0] = '\0';
 860                 tail = &pos[2];
 861                 dir = opendir(dirname);
 862                 if (dir != NULL) {
 863                         struct dirent *dent;
 864
 865                         for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 866                                 struct stat stats;
 867
 868                                 if (dent->d_name[0] == '.')
 869                                         continue;
 870                                 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
 871                                 if (stat(attr, &stats) == 0) {
 872                                         found = true;
 873                                         break;
 874                                 }
 875                         }
 876                         closedir(dir);
 877                 }
 878         }
 879
 880         return found;
 881 }
 882
 883 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
 884 {
 885         char *linepos;
 886         char *temp;
 887
 888         linepos = *line;
 889         if (linepos == NULL || linepos[0] == '\0')
 890                 return -1;
 891
 892         /* skip whitespace */
 893         while (isspace(linepos[0]) || linepos[0] == ',')
 894                 linepos++;
 895
 896         /* get the key */
 897         if (linepos[0] == '\0')
 898                 return -1;
 899         *key = linepos;
 900
 901         for (;;) {
 902                 linepos++;
 903                 if (linepos[0] == '\0')
 904                         return -1;
 905                 if (isspace(linepos[0]))
 906                         break;
 907                 if (linepos[0] == '=')
 908                         break;
 909                 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
 910                         if (linepos[1] == '=')
 911                                 break;
 912         }
 913
 914         /* remember end of key */
 915         temp = linepos;
 916
 917         /* skip whitespace after key */
 918         while (isspace(linepos[0]))
 919                 linepos++;
 920         if (linepos[0] == '\0')
 921                 return -1;
 922
 923         /* get operation type */
 924         if (linepos[0] == '=' && linepos[1] == '=') {
 925                 *op = OP_MATCH;
 926                 linepos += 2;
 927         } else if (linepos[0] == '!' && linepos[1] == '=') {
 928                 *op = OP_NOMATCH;
 929                 linepos += 2;
 930         } else if (linepos[0] == '+' && linepos[1] == '=') {
 931                 *op = OP_ADD;
 932                 linepos += 2;
 933         } else if (linepos[0] == '=') {
 934                 *op = OP_ASSIGN;
 935                 linepos++;
 936         } else if (linepos[0] == ':' && linepos[1] == '=') {
 937                 *op = OP_ASSIGN_FINAL;
 938                 linepos += 2;
 939         } else
 940                 return -1;
 941
 942         /* terminate key */
 943         temp[0] = '\0';
 944
 945         /* skip whitespace after operator */
 946         while (isspace(linepos[0]))
 947                 linepos++;
 948         if (linepos[0] == '\0')
 949                 return -1;
 950
 951         /* get the value */
 952         if (linepos[0] == '"')
 953                 linepos++;
 954         else
 955                 return -1;
 956         *value = linepos;
 957
 958         /* terminate */
 959         temp = strchr(linepos, '"');
 960         if (!temp)
 961                 return -1;
 962         temp[0] = '\0';
 963         temp++;
 964
 965         /* move line to next key */
 966         *line = temp;
 967         return 0;
 968 }
 969
 970 /* extract possible KEY{attr} */
 971 static const char *get_key_attribute(struct udev *udev, char *str)
 972 {
 973         char *pos;
 974         char *attr;
 975
 976         attr = strchr(str, '{');
 977         if (attr != NULL) {
 978                 attr++;
 979                 pos = strchr(attr, '}');
 980                 if (pos == NULL) {
 981                         log_error("missing closing brace for format\n");
 982                         return NULL;
 983                 }
 984                 pos[0] = '\0';
 985                 return attr;
 986         }
 987         return NULL;
 988 }
 989
 990 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
 991                         enum operation_type op,
 992                         const char *value, const void *data)
 993 {
 994         struct token *token = &rule_tmp->token[rule_tmp->token_cur];
 995         const char *attr = NULL;
 996
 997         memset(token, 0x00, sizeof(struct token));
 998
 999         switch (type) {
1000         case TK_M_ACTION:
1001         case TK_M_DEVPATH:
1002         case TK_M_KERNEL:
1003         case TK_M_SUBSYSTEM:
1004         case TK_M_DRIVER:
1005         case TK_M_WAITFOR:
1006         case TK_M_DEVLINK:
1007         case TK_M_NAME:
1008         case TK_M_KERNELS:
1009         case TK_M_SUBSYSTEMS:
1010         case TK_M_DRIVERS:
1011         case TK_M_TAGS:
1012         case TK_M_PROGRAM:
1013         case TK_M_IMPORT_FILE:
1014         case TK_M_IMPORT_PROG:
1015         case TK_M_IMPORT_DB:
1016         case TK_M_IMPORT_CMDLINE:
1017         case TK_M_IMPORT_PARENT:
1018         case TK_M_RESULT:
1019         case TK_A_OWNER:
1020         case TK_A_GROUP:
1021         case TK_A_MODE:
1022         case TK_A_NAME:
1023         case TK_A_GOTO:
1024         case TK_M_TAG:
1025         case TK_A_TAG:
1026                 token->key.value_off = add_string(rule_tmp->rules, value);
1027                 break;
1028         case TK_M_IMPORT_BUILTIN:
1029                 token->key.value_off = add_string(rule_tmp->rules, value);
1030                 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
1031                 break;
1032         case TK_M_ENV:
1033         case TK_M_ATTR:
1034         case TK_M_ATTRS:
1035         case TK_A_ATTR:
1036         case TK_A_ENV:
1037                 attr = data;
1038                 token->key.value_off = add_string(rule_tmp->rules, value);
1039                 token->key.attr_off = add_string(rule_tmp->rules, attr);
1040                 break;
1041         case TK_A_DEVLINK:
1042                 token->key.value_off = add_string(rule_tmp->rules, value);
1043                 token->key.devlink_unique = *(int *)data;
1044                 break;
1045         case TK_M_TEST:
1046                 token->key.value_off = add_string(rule_tmp->rules, value);
1047                 if (data != NULL)
1048                         token->key.mode = *(mode_t *)data;
1049                 break;
1050         case TK_A_STRING_ESCAPE_NONE:
1051         case TK_A_STRING_ESCAPE_REPLACE:
1052         case TK_A_DB_PERSIST:
1053                 break;
1054         case TK_A_RUN_BUILTIN:
1055         case TK_A_RUN_PROGRAM:
1056                 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
1057                 token->key.value_off = add_string(rule_tmp->rules, value);
1058                 break;
1059         case TK_A_INOTIFY_WATCH:
1060         case TK_A_DEVLINK_PRIO:
1061                 token->key.devlink_prio = *(int *)data;
1062                 break;
1063         case TK_A_OWNER_ID:
1064                 token->key.uid = *(uid_t *)data;
1065                 break;
1066         case TK_A_GROUP_ID:
1067                 token->key.gid = *(gid_t *)data;
1068                 break;
1069         case TK_A_MODE_ID:
1070                 token->key.mode = *(mode_t *)data;
1071                 break;
1072         case TK_A_STATIC_NODE:
1073                 token->key.value_off = add_string(rule_tmp->rules, value);
1074                 break;
1075         case TK_M_EVENT_TIMEOUT:
1076                 token->key.event_timeout = *(int *)data;
1077                 break;
1078         case TK_RULE:
1079         case TK_M_PARENTS_MIN:
1080         case TK_M_PARENTS_MAX:
1081         case TK_M_MAX:
1082         case TK_END:
1083         case TK_UNSET:
1084                 log_error("wrong type %u\n", type);
1085                 return -1;
1086         }
1087
1088         if (value != NULL && type < TK_M_MAX) {
1089                 /* check if we need to split or call fnmatch() while matching rules */
1090                 enum string_glob_type glob;
1091                 int has_split;
1092                 int has_glob;
1093
1094                 has_split = (strchr(value, '|') != NULL);
1095                 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1096                 if (has_split && has_glob) {
1097                         glob = GL_SPLIT_GLOB;
1098                 } else if (has_split) {
1099                         glob = GL_SPLIT;
1100                 } else if (has_glob) {
1101                         if (streq(value, "?*"))
1102                                 glob = GL_SOMETHING;
1103                         else
1104                                 glob = GL_GLOB;
1105                 } else {
1106                         glob = GL_PLAIN;
1107                 }
1108                 token->key.glob = glob;
1109         }
1110
1111         if (value != NULL && type > TK_M_MAX) {
1112                 /* check if assigned value has substitution chars */
1113                 if (value[0] == '[')
1114                         token->key.subst = SB_SUBSYS;
1115                 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1116                         token->key.subst = SB_FORMAT;
1117                 else
1118                         token->key.subst = SB_NONE;
1119         }
1120
1121         if (attr != NULL) {
1122                 /* check if property/attribut name has substitution chars */
1123                 if (attr[0] == '[')
1124                         token->key.attrsubst = SB_SUBSYS;
1125                 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1126                         token->key.attrsubst = SB_FORMAT;
1127                 else
1128                         token->key.attrsubst = SB_NONE;
1129         }
1130
1131         token->key.type = type;
1132         token->key.op = op;
1133         rule_tmp->token_cur++;
1134         if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) {
1135                 log_error("temporary rule array too small\n");
1136                 return -1;
1137         }
1138         return 0;
1139 }
1140
1141 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1142 {
1143         unsigned int i;
1144         unsigned int start = 0;
1145         unsigned int end = rule_tmp->token_cur;
1146
1147         for (i = 0; i < rule_tmp->token_cur; i++) {
1148                 enum token_type next_val = TK_UNSET;
1149                 unsigned int next_idx = 0;
1150                 unsigned int j;
1151
1152                 /* find smallest value */
1153                 for (j = start; j < end; j++) {
1154                         if (rule_tmp->token[j].type == TK_UNSET)
1155                                 continue;
1156                         if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1157                                 next_val = rule_tmp->token[j].type;
1158                                 next_idx = j;
1159                         }
1160                 }
1161
1162                 /* add token and mark done */
1163                 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1164                         return -1;
1165                 rule_tmp->token[next_idx].type = TK_UNSET;
1166
1167                 /* shrink range */
1168                 if (next_idx == start)
1169                         start++;
1170                 if (next_idx+1 == end)
1171                         end--;
1172         }
1173         return 0;
1174 }
1175
1176 static int add_rule(struct udev_rules *rules, char *line,
1177                     const char *filename, unsigned int filename_off, unsigned int lineno)
1178 {
1179         char *linepos;
1180         const char *attr;
1181         struct rule_tmp rule_tmp;
1182
1183         memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1184         rule_tmp.rules = rules;
1185         rule_tmp.rule.type = TK_RULE;
1186         /* the offset in the rule is limited to unsigned short */
1187         if (filename_off < USHRT_MAX)
1188                 rule_tmp.rule.rule.filename_off = filename_off;
1189         rule_tmp.rule.rule.filename_line = lineno;
1190
1191         linepos = line;
1192         for (;;) {
1193                 char *key;
1194                 char *value;
1195                 enum operation_type op;
1196
1197                 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1198                         break;
1199
1200                 if (streq(key, "ACTION")) {
1201                         if (op > OP_MATCH_MAX) {
1202                                 log_error("invalid ACTION operation\n");
1203                                 goto invalid;
1204                         }
1205                         rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1206                         continue;
1207                 }
1208
1209                 if (streq(key, "DEVPATH")) {
1210                         if (op > OP_MATCH_MAX) {
1211                                 log_error("invalid DEVPATH operation\n");
1212                                 goto invalid;
1213                         }
1214                         rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1215                         continue;
1216                 }
1217
1218                 if (streq(key, "KERNEL")) {
1219                         if (op > OP_MATCH_MAX) {
1220                                 log_error("invalid KERNEL operation\n");
1221                                 goto invalid;
1222                         }
1223                         rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1224                         continue;
1225                 }
1226
1227                 if (streq(key, "SUBSYSTEM")) {
1228                         if (op > OP_MATCH_MAX) {
1229                                 log_error("invalid SUBSYSTEM operation\n");
1230                                 goto invalid;
1231                         }
1232                         /* bus, class, subsystem events should all be the same */
1233                         if (streq(value, "subsystem") ||
1234                             streq(value, "bus") ||
1235                             streq(value, "class")) {
1236                                 if (streq(value, "bus") || streq(value, "class"))
1237                                         log_error("'%s' must be specified as 'subsystem' \n"
1238                                             "please fix it in %s:%u", value, filename, lineno);
1239                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1240                         } else
1241                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1242                         continue;
1243                 }
1244
1245                 if (streq(key, "DRIVER")) {
1246                         if (op > OP_MATCH_MAX) {
1247                                 log_error("invalid DRIVER operation\n");
1248                                 goto invalid;
1249                         }
1250                         rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1251                         continue;
1252                 }
1253
1254                 if (startswith(key, "ATTR{")) {
1255                         attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1256                         if (attr == NULL) {
1257                                 log_error("error parsing ATTR attribute\n");
1258                                 goto invalid;
1259                         }
1260                         if (op < OP_MATCH_MAX) {
1261                                 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1262                         } else {
1263                                 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1264                         }
1265                         continue;
1266                 }
1267
1268                 if (streq(key, "KERNELS")) {
1269                         if (op > OP_MATCH_MAX) {
1270                                 log_error("invalid KERNELS operation\n");
1271                                 goto invalid;
1272                         }
1273                         rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1274                         continue;
1275                 }
1276
1277                 if (streq(key, "SUBSYSTEMS")) {
1278                         if (op > OP_MATCH_MAX) {
1279                                 log_error("invalid SUBSYSTEMS operation\n");
1280                                 goto invalid;
1281                         }
1282                         rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1283                         continue;
1284                 }
1285
1286                 if (streq(key, "DRIVERS")) {
1287                         if (op > OP_MATCH_MAX) {
1288                                 log_error("invalid DRIVERS operation\n");
1289                                 goto invalid;
1290                         }
1291                         rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1292                         continue;
1293                 }
1294
1295                 if (startswith(key, "ATTRS{")) {
1296                         if (op > OP_MATCH_MAX) {
1297                                 log_error("invalid ATTRS operation\n");
1298                                 goto invalid;
1299                         }
1300                         attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1301                         if (attr == NULL) {
1302                                 log_error("error parsing ATTRS attribute\n");
1303                                 goto invalid;
1304                         }
1305                         if (startswith(attr, "device/"))
1306                                 log_error("the 'device' link may not be available in a future kernel, "
1307                                     "please fix it in %s:%u", filename, lineno);
1308                         else if (strstr(attr, "../") != NULL)
1309                                 log_error("do not reference parent sysfs directories directly, "
1310                                     "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1311                         rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1312                         continue;
1313                 }
1314
1315                 if (streq(key, "TAGS")) {
1316                         if (op > OP_MATCH_MAX) {
1317                                 log_error("invalid TAGS operation\n");
1318                                 goto invalid;
1319                         }
1320                         rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1321                         continue;
1322                 }
1323
1324                 if (startswith(key, "ENV{")) {
1325                         attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1326                         if (attr == NULL) {
1327                                 log_error("error parsing ENV attribute\n");
1328                                 goto invalid;
1329                         }
1330                         if (op < OP_MATCH_MAX) {
1331                                 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1332                                         goto invalid;
1333                         } else {
1334                                 static const char *blacklist[] = {
1335                                         "ACTION",
1336                                         "SUBSYSTEM",
1337                                         "DEVTYPE",
1338                                         "MAJOR",
1339                                         "MINOR",
1340                                         "DRIVER",
1341                                         "IFINDEX",
1342                                         "DEVNAME",
1343                                         "DEVLINKS",
1344                                         "DEVPATH",
1345                                         "TAGS",
1346                                 };
1347                                 unsigned int i;
1348
1349                                 for (i = 0; i < ELEMENTSOF(blacklist); i++) {
1350                                         if (!streq(attr, blacklist[i]))
1351                                                 continue;
1352                                         log_error("invalid ENV attribute, '%s' can not be set %s:%u\n", attr, filename, lineno);
1353                                         goto invalid;
1354                                 }
1355                                 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1356                                         goto invalid;
1357                         }
1358                         continue;
1359                 }
1360
1361                 if (streq(key, "TAG")) {
1362                         if (op < OP_MATCH_MAX)
1363                                 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1364                         else
1365                                 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1366                         continue;
1367                 }
1368
1369                 if (streq(key, "PROGRAM")) {
1370                         rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1371                         continue;
1372                 }
1373
1374                 if (streq(key, "RESULT")) {
1375                         if (op > OP_MATCH_MAX) {
1376                                 log_error("invalid RESULT operation\n");
1377                                 goto invalid;
1378                         }
1379                         rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1380                         continue;
1381                 }
1382
1383                 if (startswith(key, "IMPORT")) {
1384                         attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1385                         if (attr == NULL) {
1386                                 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u\n", filename, lineno);
1387                                 continue;
1388                         }
1389                         if (streq(attr, "program")) {
1390                                 /* find known built-in command */
1391                                 if (value[0] != '/') {
1392                                         enum udev_builtin_cmd cmd;
1393
1394                                         cmd = udev_builtin_lookup(value);
1395                                         if (cmd < UDEV_BUILTIN_MAX) {
1396                                                 log_debug("IMPORT found builtin '%s', replacing %s:%u\n",
1397                                                           value, filename, lineno);
1398                                                 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1399                                                 continue;
1400                                         }
1401                                 }
1402                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1403                         } else if (streq(attr, "builtin")) {
1404                                 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1405
1406                                 if (cmd < UDEV_BUILTIN_MAX)
1407                                         rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1408                                 else
1409                                         log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
1410                         } else if (streq(attr, "file")) {
1411                                 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1412                         } else if (streq(attr, "db")) {
1413                                 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1414                         } else if (streq(attr, "cmdline")) {
1415                                 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
1416                         } else if (streq(attr, "parent")) {
1417                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1418                         } else
1419                                 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u\n", filename, lineno);
1420                         continue;
1421                 }
1422
1423                 if (startswith(key, "TEST")) {
1424                         mode_t mode = 0;
1425
1426                         if (op > OP_MATCH_MAX) {
1427                                 log_error("invalid TEST operation\n");
1428                                 goto invalid;
1429                         }
1430                         attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1431                         if (attr != NULL) {
1432                                 mode = strtol(attr, NULL, 8);
1433                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1434                         } else {
1435                                 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1436                         }
1437                         continue;
1438                 }
1439
1440                 if (startswith(key, "RUN")) {
1441                         attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1442                         if (attr == NULL)
1443                                 attr = "program";
1444
1445                         if (streq(attr, "builtin")) {
1446                                 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1447
1448                                 if (cmd < UDEV_BUILTIN_MAX)
1449                                         rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1450                                 else
1451                                         log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
1452                         } else if (streq(attr, "program")) {
1453                                 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
1454
1455                                 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
1456                         } else {
1457                                 log_error("RUN{} unknown type, ignoring RUN %s:%u\n", filename, lineno);
1458                         }
1459
1460                         continue;
1461                 }
1462
1463                 if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
1464                         rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1465                         continue;
1466                 }
1467
1468                 if (streq(key, "LABEL")) {
1469                         rule_tmp.rule.rule.label_off = add_string(rules, value);
1470                         continue;
1471                 }
1472
1473                 if (streq(key, "GOTO")) {
1474                         rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1475                         continue;
1476                 }
1477
1478                 if (startswith(key, "NAME")) {
1479                         if (op < OP_MATCH_MAX) {
1480                                 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1481                         } else {
1482                                 if (streq(value, "%k")) {
1483                                         log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
1484                                             "please remove it from %s:%u\n", filename, lineno);
1485                                         continue;
1486                                 }
1487                                 if (value[0] == '\0') {
1488                                         log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
1489                                                   "please remove it from %s:%u\n", filename, lineno);
1490                                         continue;
1491                                 }
1492                                 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1493                         }
1494                         rule_tmp.rule.rule.can_set_name = true;
1495                         continue;
1496                 }
1497
1498                 if (startswith(key, "SYMLINK")) {
1499                         if (op < OP_MATCH_MAX) {
1500                                 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1501                         } else {
1502                                 int flag = 0;
1503
1504                                 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1505                                 if (attr != NULL && strstr(attr, "unique") != NULL)
1506                                         flag = 1;
1507                                 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1508                         }
1509                         rule_tmp.rule.rule.can_set_name = true;
1510                         continue;
1511                 }
1512
1513                 if (streq(key, "OWNER")) {
1514                         uid_t uid;
1515                         char *endptr;
1516
1517                         uid = strtoul(value, &endptr, 10);
1518                         if (endptr[0] == '\0') {
1519                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1520                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1521                                 uid = add_uid(rules, value);
1522                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1523                         } else if (rules->resolve_names >= 0) {
1524                                 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1525                         }
1526                         rule_tmp.rule.rule.can_set_name = true;
1527                         continue;
1528                 }
1529
1530                 if (streq(key, "GROUP")) {
1531                         gid_t gid;
1532                         char *endptr;
1533
1534                         gid = strtoul(value, &endptr, 10);
1535                         if (endptr[0] == '\0') {
1536                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1537                         } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1538                                 gid = add_gid(rules, value);
1539                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1540                         } else if (rules->resolve_names >= 0) {
1541                                 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1542                         }
1543                         rule_tmp.rule.rule.can_set_name = true;
1544                         continue;
1545                 }
1546
1547                 if (streq(key, "MODE")) {
1548                         mode_t mode;
1549                         char *endptr;
1550
1551                         mode = strtol(value, &endptr, 8);
1552                         if (endptr[0] == '\0')
1553                                 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1554                         else
1555                                 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1556                         rule_tmp.rule.rule.can_set_name = true;
1557                         continue;
1558                 }
1559
1560                 if (streq(key, "OPTIONS")) {
1561                         const char *pos;
1562
1563                         pos = strstr(value, "link_priority=");
1564                         if (pos != NULL) {
1565                                 int prio = atoi(&pos[strlen("link_priority=")]);
1566
1567                                 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
1568                         }
1569
1570                         pos = strstr(value, "event_timeout=");
1571                         if (pos != NULL) {
1572                                 int tout = atoi(&pos[strlen("event_timeout=")]);
1573
1574                                 rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout);
1575                         }
1576
1577                         pos = strstr(value, "string_escape=");
1578                         if (pos != NULL) {
1579                                 pos = &pos[strlen("string_escape=")];
1580                                 if (startswith(pos, "none"))
1581                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
1582                                 else if (startswith(pos, "replace"))
1583                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1584                         }
1585
1586                         pos = strstr(value, "db_persist");
1587                         if (pos != NULL)
1588                                 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1589
1590                         pos = strstr(value, "nowatch");
1591                         if (pos != NULL) {
1592                                 const int off = 0;
1593
1594                                 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
1595                         } else {
1596                                 pos = strstr(value, "watch");
1597                                 if (pos != NULL) {
1598                                         const int on = 1;
1599
1600                                         rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
1601                                 }
1602                         }
1603
1604                         pos = strstr(value, "static_node=");
1605                         if (pos != NULL) {
1606                                 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1607                                 rule_tmp.rule.rule.has_static_node = true;
1608                         }
1609
1610                         continue;
1611                 }
1612
1613                 log_error("unknown key '%s' in %s:%u\n", key, filename, lineno);
1614                 goto invalid;
1615         }
1616
1617         /* add rule token */
1618         rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1619         if (add_token(rules, &rule_tmp.rule) != 0)
1620                 goto invalid;
1621
1622         /* add tokens to list, sorted by type */
1623         if (sort_token(rules, &rule_tmp) != 0)
1624                 goto invalid;
1625
1626         return 0;
1627 invalid:
1628         log_error("invalid rule '%s:%u'\n", filename, lineno);
1629         return -1;
1630 }
1631
1632 static int parse_file(struct udev_rules *rules, const char *filename)
1633 {
1634         FILE *f;
1635         unsigned int first_token;
1636         unsigned int filename_off;
1637         char line[UTIL_LINE_SIZE];
1638         int line_nr = 0;
1639         unsigned int i;
1640
1641         if (null_or_empty_path(filename)) {
1642                 log_debug("skip empty file: %s\n", filename);
1643                 return 0;
1644         }
1645         log_debug("read rules file: %s\n", filename);
1646
1647         f = fopen(filename, "r");
1648         if (f == NULL)
1649                 return -1;
1650
1651         first_token = rules->token_cur;
1652         filename_off = add_string(rules, filename);
1653
1654         while (fgets(line, sizeof(line), f) != NULL) {
1655                 char *key;
1656                 size_t len;
1657
1658                 /* skip whitespace */
1659                 line_nr++;
1660                 key = line;
1661                 while (isspace(key[0]))
1662                         key++;
1663
1664                 /* comment */
1665                 if (key[0] == '#')
1666                         continue;
1667
1668                 len = strlen(line);
1669                 if (len < 3)
1670                         continue;
1671
1672                 /* continue reading if backslash+newline is found */
1673                 while (line[len-2] == '\\') {
1674                         if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1675                                 break;
1676                         if (strlen(&line[len-2]) < 2)
1677                                 break;
1678                         line_nr++;
1679                         len = strlen(line);
1680                 }
1681
1682                 if (len+1 >= sizeof(line)) {
1683                         log_error("line too long '%s':%u, ignored\n", filename, line_nr);
1684                         continue;
1685                 }
1686                 add_rule(rules, key, filename, filename_off, line_nr);
1687         }
1688         fclose(f);
1689
1690         /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1691         for (i = first_token+1; i < rules->token_cur; i++) {
1692                 if (rules->tokens[i].type == TK_A_GOTO) {
1693                         char *label = &rules->buf[rules->tokens[i].key.value_off];
1694                         unsigned int j;
1695
1696                         for (j = i+1; j < rules->token_cur; j++) {
1697                                 if (rules->tokens[j].type != TK_RULE)
1698                                         continue;
1699                                 if (rules->tokens[j].rule.label_off == 0)
1700                                         continue;
1701                                 if (!streq(label, &rules->buf[rules->tokens[j].rule.label_off]))
1702                                         continue;
1703                                 rules->tokens[i].key.rule_goto = j;
1704                                 break;
1705                         }
1706                         if (rules->tokens[i].key.rule_goto == 0)
1707                                 log_error("GOTO '%s' has no matching label in: '%s'\n", label, filename);
1708                 }
1709         }
1710         return 0;
1711 }
1712
1713 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1714 {
1715         struct udev_rules *rules;
1716         struct udev_list file_list;
1717         struct token end_token;
1718         char **files, **f;
1719         int r;
1720
1721         rules = calloc(1, sizeof(struct udev_rules));
1722         if (rules == NULL)
1723                 return NULL;
1724         rules->udev = udev;
1725         rules->resolve_names = resolve_names;
1726         udev_list_init(udev, &file_list, true);
1727
1728         /* init token array and string buffer */
1729         rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1730         if (rules->tokens == NULL) {
1731                 free(rules);
1732                 return NULL;
1733         }
1734         rules->token_max = PREALLOC_TOKEN;
1735
1736         rules->buf = malloc(PREALLOC_STRBUF);
1737         if (rules->buf == NULL) {
1738                 free(rules->tokens);
1739                 free(rules);
1740                 return NULL;
1741         }
1742         rules->buf_max = PREALLOC_STRBUF;
1743         /* offset 0 is always '\0' */
1744         rules->buf[0] = '\0';
1745         rules->buf_cur = 1;
1746
1747         rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1748         if (rules->trie_nodes == NULL) {
1749                 free(rules->buf);
1750                 free(rules->tokens);
1751                 free(rules);
1752                 return NULL;
1753         }
1754         rules->trie_nodes_max = PREALLOC_TRIE;
1755         /* offset 0 is the trie root, with an empty string */
1756         memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1757         rules->trie_nodes_cur = 1;
1758
1759         rules->dirs = strv_new(TEST_PREFIX SYSCONFDIR "/udev/rules.d",
1760                                TEST_PREFIX "/run/udev/rules.d",
1761                                TEST_PREFIX UDEVLIBEXECDIR "/rules.d",
1762                                NULL);
1763         if (!rules->dirs) {
1764                 log_error("failed to build config directory array");
1765                 return NULL;
1766         }
1767         if (!strv_path_canonicalize(rules->dirs)) {
1768                 log_error("failed to canonicalize config directories\n");
1769                 return NULL;
1770         }
1771         strv_uniq(rules->dirs);
1772         r = conf_files_list_strv(&files, ".rules", (const char **)rules->dirs);
1773         if (r < 0) {
1774                 log_error("failed to enumerate rules files: %s\n", strerror(-r));
1775                 return NULL;
1776         }
1777         rules->dirs_ts_usec = calloc(strv_length(rules->dirs), sizeof(long long));
1778
1779         /*
1780          * The offset value in the rules strct is limited; add all
1781          * rules file names to the beginning of the string buffer.
1782          */
1783         STRV_FOREACH(f, files)
1784                 add_string(rules, *f);
1785
1786         STRV_FOREACH(f, files)
1787                 parse_file(rules, *f);
1788
1789         strv_free(files);
1790
1791         memset(&end_token, 0x00, sizeof(struct token));
1792         end_token.type = TK_END;
1793         add_token(rules, &end_token);
1794
1795         /* shrink allocated token and string buffer */
1796         if (rules->token_cur < rules->token_max) {
1797                 struct token *tokens;
1798
1799                 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1800                 if (tokens != NULL || rules->token_cur == 0) {
1801                         rules->tokens = tokens;
1802                         rules->token_max = rules->token_cur;
1803                 }
1804         }
1805         if (rules->buf_cur < rules->buf_max) {
1806                 char *buf;
1807
1808                 buf = realloc(rules->buf, rules->buf_cur);
1809                 if (buf != NULL || rules->buf_cur == 0) {
1810                         rules->buf = buf;
1811                         rules->buf_max = rules->buf_cur;
1812                 }
1813         }
1814         log_debug("rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1815                   rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1816         log_debug("temporary index used %zu bytes (%u * %zu bytes)\n",
1817                   rules->trie_nodes_cur * sizeof(struct trie_node),
1818                   rules->trie_nodes_cur, sizeof(struct trie_node));
1819
1820         /* cleanup trie */
1821         free(rules->trie_nodes);
1822         rules->trie_nodes = NULL;
1823         rules->trie_nodes_cur = 0;
1824         rules->trie_nodes_max = 0;
1825
1826         /* cleanup uid/gid cache */
1827         free(rules->uids);
1828         rules->uids = NULL;
1829         rules->uids_cur = 0;
1830         rules->uids_max = 0;
1831         free(rules->gids);
1832         rules->gids = NULL;
1833         rules->gids_cur = 0;
1834         rules->gids_max = 0;
1835
1836         dump_rules(rules);
1837         return rules;
1838 }
1839
1840 struct udev_rules *udev_rules_unref(struct udev_rules *rules)
1841 {
1842         if (rules == NULL)
1843                 return NULL;
1844         free(rules->tokens);
1845         free(rules->buf);
1846         free(rules->trie_nodes);
1847         free(rules->uids);
1848         free(rules->gids);
1849         strv_free(rules->dirs);
1850         free(rules->dirs_ts_usec);
1851         free(rules);
1852         return NULL;
1853 }
1854
1855 bool udev_rules_check_timestamp(struct udev_rules *rules)
1856 {
1857         unsigned int i;
1858         bool changed = false;
1859
1860         for (i = 0; rules->dirs[i]; i++) {
1861                 struct stat stats;
1862
1863                 if (stat(rules->dirs[i], &stats) < 0)
1864                         continue;
1865
1866                 if (rules->dirs_ts_usec[i] == ts_usec(&stats.st_mtim))
1867                         continue;
1868
1869                 /* first check */
1870                 if (rules->dirs_ts_usec[i] != 0) {
1871                         log_debug("reload - timestamp of '%s' changed\n", rules->dirs[i]);
1872                         changed = true;
1873                 }
1874
1875                 /* update timestamp */
1876                 rules->dirs_ts_usec[i] = ts_usec(&stats.st_mtim);
1877         }
1878
1879         return changed;
1880 }
1881
1882 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1883 {
1884         char *key_value = &rules->buf[token->key.value_off];
1885         char *pos;
1886         bool match = false;
1887
1888         if (val == NULL)
1889                 val = "";
1890
1891         switch (token->key.glob) {
1892         case GL_PLAIN:
1893                 match = (streq(key_value, val));
1894                 break;
1895         case GL_GLOB:
1896                 match = (fnmatch(key_value, val, 0) == 0);
1897                 break;
1898         case GL_SPLIT:
1899                 {
1900                         const char *s;
1901                         size_t len;
1902
1903                         s = &rules->buf[token->key.value_off];
1904                         len = strlen(val);
1905                         for (;;) {
1906                                 const char *next;
1907
1908                                 next = strchr(s, '|');
1909                                 if (next != NULL) {
1910                                         size_t matchlen = (size_t)(next - s);
1911
1912                                         match = (matchlen == len && strncmp(s, val, matchlen) == 0);
1913                                         if (match)
1914                                                 break;
1915                                 } else {
1916                                         match = (streq(s, val));
1917                                         break;
1918                                 }
1919                                 s = &next[1];
1920                         }
1921                         break;
1922                 }
1923         case GL_SPLIT_GLOB:
1924                 {
1925                         char value[UTIL_PATH_SIZE];
1926
1927                         util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1928                         key_value = value;
1929                         while (key_value != NULL) {
1930                                 pos = strchr(key_value, '|');
1931                                 if (pos != NULL) {
1932                                         pos[0] = '\0';
1933                                         pos = &pos[1];
1934                                 }
1935                                 match = (fnmatch(key_value, val, 0) == 0);
1936                                 if (match)
1937                                         break;
1938                                 key_value = pos;
1939                         }
1940                         break;
1941                 }
1942         case GL_SOMETHING:
1943                 match = (val[0] != '\0');
1944                 break;
1945         case GL_UNSET:
1946                 return -1;
1947         }
1948
1949         if (match && (token->key.op == OP_MATCH))
1950                 return 0;
1951         if (!match && (token->key.op == OP_NOMATCH))
1952                 return 0;
1953         return -1;
1954 }
1955
1956 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1957 {
1958         const char *name;
1959         char nbuf[UTIL_NAME_SIZE];
1960         const char *value;
1961         char vbuf[UTIL_NAME_SIZE];
1962         size_t len;
1963
1964         name = &rules->buf[cur->key.attr_off];
1965         switch (cur->key.attrsubst) {
1966         case SB_FORMAT:
1967                 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1968                 name = nbuf;
1969                 /* fall through */
1970         case SB_NONE:
1971                 value = udev_device_get_sysattr_value(dev, name);
1972                 if (value == NULL)
1973                         return -1;
1974                 break;
1975         case SB_SUBSYS:
1976                 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1977                         return -1;
1978                 value = vbuf;
1979                 break;
1980         default:
1981                 return -1;
1982         }
1983
1984         /* remove trailing whitespace, if not asked to match for it */
1985         len = strlen(value);
1986         if (len > 0 && isspace(value[len-1])) {
1987                 const char *key_value;
1988                 size_t klen;
1989
1990                 key_value = &rules->buf[cur->key.value_off];
1991                 klen = strlen(key_value);
1992                 if (klen > 0 && !isspace(key_value[klen-1])) {
1993                         if (value != vbuf) {
1994                                 util_strscpy(vbuf, sizeof(vbuf), value);
1995                                 value = vbuf;
1996                         }
1997                         while (len > 0 && isspace(vbuf[--len]))
1998                                 vbuf[len] = '\0';
1999                 }
2000         }
2001
2002         return match_key(rules, cur, value);
2003 }
2004
2005 enum escape_type {
2006         ESCAPE_UNSET,
2007         ESCAPE_NONE,
2008         ESCAPE_REPLACE,
2009 };
2010
2011 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask)
2012 {
2013         struct token *cur;
2014         struct token *rule;
2015         enum escape_type esc = ESCAPE_UNSET;
2016         bool can_set_name;
2017
2018         if (rules->tokens == NULL)
2019                 return -1;
2020
2021         can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
2022                         (major(udev_device_get_devnum(event->dev)) > 0 ||
2023                          udev_device_get_ifindex(event->dev) > 0));
2024
2025         /* loop through token list, match, run actions or forward to next rule */
2026         cur = &rules->tokens[0];
2027         rule = cur;
2028         for (;;) {
2029                 dump_token(rules, cur);
2030                 switch (cur->type) {
2031                 case TK_RULE:
2032                         /* current rule */
2033                         rule = cur;
2034                         /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2035                         if (!can_set_name && rule->rule.can_set_name)
2036                                 goto nomatch;
2037                         esc = ESCAPE_UNSET;
2038                         break;
2039                 case TK_M_ACTION:
2040                         if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2041                                 goto nomatch;
2042                         break;
2043                 case TK_M_DEVPATH:
2044                         if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2045                                 goto nomatch;
2046                         break;
2047                 case TK_M_KERNEL:
2048                         if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2049                                 goto nomatch;
2050                         break;
2051                 case TK_M_DEVLINK: {
2052                         struct udev_list_entry *list_entry;
2053                         bool match = false;
2054
2055                         udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2056                                 const char *devlink;
2057
2058                                 devlink =  udev_list_entry_get_name(list_entry) + strlen(TEST_PREFIX "/dev/");
2059                                 if (match_key(rules, cur, devlink) == 0) {
2060                                         match = true;
2061                                         break;
2062                                 }
2063                         }
2064                         if (!match)
2065                                 goto nomatch;
2066                         break;
2067                 }
2068                 case TK_M_NAME:
2069                         if (match_key(rules, cur, event->name) != 0)
2070                                 goto nomatch;
2071                         break;
2072                 case TK_M_ENV: {
2073                         const char *key_name = &rules->buf[cur->key.attr_off];
2074                         const char *value;
2075
2076                         value = udev_device_get_property_value(event->dev, key_name);
2077                         if (value == NULL)
2078                                 value = "";
2079                         if (match_key(rules, cur, value))
2080                                 goto nomatch;
2081                         break;
2082                 }
2083                 case TK_M_TAG: {
2084                         struct udev_list_entry *list_entry;
2085                         bool match = false;
2086
2087                         udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
2088                                 if (streq(&rules->buf[cur->key.value_off], udev_list_entry_get_name(list_entry))) {
2089                                         match = true;
2090                                         break;
2091                                 }
2092                         }
2093                         if (!match && (cur->key.op != OP_NOMATCH))
2094                                 goto nomatch;
2095                         break;
2096                 }
2097                 case TK_M_SUBSYSTEM:
2098                         if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2099                                 goto nomatch;
2100                         break;
2101                 case TK_M_DRIVER:
2102                         if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2103                                 goto nomatch;
2104                         break;
2105                 case TK_M_WAITFOR: {
2106                         char filename[UTIL_PATH_SIZE];
2107                         int found;
2108
2109                         udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2110                         found = (wait_for_file(event->dev, filename, 10) == 0);
2111                         if (!found && (cur->key.op != OP_NOMATCH))
2112                                 goto nomatch;
2113                         break;
2114                 }
2115                 case TK_M_ATTR:
2116                         if (match_attr(rules, event->dev, event, cur) != 0)
2117                                 goto nomatch;
2118                         break;
2119                 case TK_M_KERNELS:
2120                 case TK_M_SUBSYSTEMS:
2121                 case TK_M_DRIVERS:
2122                 case TK_M_ATTRS:
2123                 case TK_M_TAGS: {
2124                         struct token *next;
2125
2126                         /* get whole sequence of parent matches */
2127                         next = cur;
2128                         while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2129                                 next++;
2130
2131                         /* loop over parents */
2132                         event->dev_parent = event->dev;
2133                         for (;;) {
2134                                 struct token *key;
2135
2136                                 /* loop over sequence of parent match keys */
2137                                 for (key = cur; key < next; key++ ) {
2138                                         dump_token(rules, key);
2139                                         switch(key->type) {
2140                                         case TK_M_KERNELS:
2141                                                 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2142                                                         goto try_parent;
2143                                                 break;
2144                                         case TK_M_SUBSYSTEMS:
2145                                                 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2146                                                         goto try_parent;
2147                                                 break;
2148                                         case TK_M_DRIVERS:
2149                                                 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2150                                                         goto try_parent;
2151                                                 break;
2152                                         case TK_M_ATTRS:
2153                                                 if (match_attr(rules, event->dev_parent, event, key) != 0)
2154                                                         goto try_parent;
2155                                                 break;
2156                                         case TK_M_TAGS: {
2157                                                 bool match = udev_device_has_tag(event->dev_parent, &rules->buf[cur->key.value_off]);
2158
2159                                                 if (match && key->key.op == OP_NOMATCH)
2160                                                         goto try_parent;
2161                                                 if (!match && key->key.op == OP_MATCH)
2162                                                         goto try_parent;
2163                                                 break;
2164                                         }
2165                                         default:
2166                                                 goto nomatch;
2167                                         }
2168                                 }
2169                                 break;
2170
2171                         try_parent:
2172                                 event->dev_parent = udev_device_get_parent(event->dev_parent);
2173                                 if (event->dev_parent == NULL)
2174                                         goto nomatch;
2175                         }
2176                         /* move behind our sequence of parent match keys */
2177                         cur = next;
2178                         continue;
2179                 }
2180                 case TK_M_TEST: {
2181                         char filename[UTIL_PATH_SIZE];
2182                         struct stat statbuf;
2183                         int match;
2184
2185                         udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2186                         if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2187                                 if (filename[0] != '/') {
2188                                         char tmp[UTIL_PATH_SIZE];
2189
2190                                         util_strscpy(tmp, sizeof(tmp), filename);
2191                                         util_strscpyl(filename, sizeof(filename),
2192                                                       udev_device_get_syspath(event->dev), "/", tmp, NULL);
2193                                 }
2194                         }
2195                         attr_subst_subdir(filename, sizeof(filename));
2196
2197                         match = (stat(filename, &statbuf) == 0);
2198                         if (match && cur->key.mode > 0)
2199                                 match = ((statbuf.st_mode & cur->key.mode) > 0);
2200                         if (match && cur->key.op == OP_NOMATCH)
2201                                 goto nomatch;
2202                         if (!match && cur->key.op == OP_MATCH)
2203                                 goto nomatch;
2204                         break;
2205                 }
2206                 case TK_M_EVENT_TIMEOUT:
2207                         log_debug("OPTIONS event_timeout=%u\n", cur->key.event_timeout);
2208                         event->timeout_usec = cur->key.event_timeout * 1000 * 1000;
2209                         break;
2210                 case TK_M_PROGRAM: {
2211                         char program[UTIL_PATH_SIZE];
2212                         char **envp;
2213                         char result[UTIL_PATH_SIZE];
2214
2215                         free(event->program_result);
2216                         event->program_result = NULL;
2217                         udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2218                         envp = udev_device_get_properties_envp(event->dev);
2219                         log_debug("PROGRAM '%s' %s:%u\n",
2220                                   program,
2221                                   &rules->buf[rule->rule.filename_off],
2222                                   rule->rule.filename_line);
2223
2224                         if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) {
2225                                 if (cur->key.op != OP_NOMATCH)
2226                                         goto nomatch;
2227                         } else {
2228                                 int count;
2229
2230                                 util_remove_trailing_chars(result, '\n');
2231                                 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2232                                         count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2233                                         if (count > 0)
2234                                                 log_debug("%i character(s) replaced\n" , count);
2235                                 }
2236                                 event->program_result = strdup(result);
2237                                 if (cur->key.op == OP_NOMATCH)
2238                                         goto nomatch;
2239                         }
2240                         break;
2241                 }
2242                 case TK_M_IMPORT_FILE: {
2243                         char import[UTIL_PATH_SIZE];
2244
2245                         udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2246                         if (import_file_into_properties(event->dev, import) != 0)
2247                                 if (cur->key.op != OP_NOMATCH)
2248                                         goto nomatch;
2249                         break;
2250                 }
2251                 case TK_M_IMPORT_PROG: {
2252                         char import[UTIL_PATH_SIZE];
2253
2254                         udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2255                         log_debug("IMPORT '%s' %s:%u\n",
2256                                   import,
2257                                   &rules->buf[rule->rule.filename_off],
2258                                   rule->rule.filename_line);
2259
2260                         if (import_program_into_properties(event, import, sigmask) != 0)
2261                                 if (cur->key.op != OP_NOMATCH)
2262                                         goto nomatch;
2263                         break;
2264                 }
2265                 case TK_M_IMPORT_BUILTIN: {
2266                         char command[UTIL_PATH_SIZE];
2267
2268                         if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2269                                 /* check if we ran already */
2270                                 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
2271                                         log_debug("IMPORT builtin skip '%s' %s:%u\n",
2272                                                   udev_builtin_name(cur->key.builtin_cmd),
2273                                                   &rules->buf[rule->rule.filename_off],
2274                                                   rule->rule.filename_line);
2275                                         /* return the result from earlier run */
2276                                         if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2277                                         if (cur->key.op != OP_NOMATCH)
2278                                                         goto nomatch;
2279                                         break;
2280                                 }
2281                                 /* mark as ran */
2282                                 event->builtin_run |= (1 << cur->key.builtin_cmd);
2283                         }
2284
2285                         udev_event_apply_format(event, &rules->buf[cur->key.value_off], command, sizeof(command));
2286                         log_debug("IMPORT builtin '%s' %s:%u\n",
2287                                   udev_builtin_name(cur->key.builtin_cmd),
2288                                   &rules->buf[rule->rule.filename_off],
2289                                   rule->rule.filename_line);
2290
2291                         if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2292                                 /* remember failure */
2293                                 log_debug("IMPORT builtin '%s' returned non-zero\n",
2294                                           udev_builtin_name(cur->key.builtin_cmd));
2295                                 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2296                                 if (cur->key.op != OP_NOMATCH)
2297                                         goto nomatch;
2298                         }
2299                         break;
2300                 }
2301                 case TK_M_IMPORT_DB: {
2302                         const char *key = &rules->buf[cur->key.value_off];
2303                         const char *value;
2304
2305                         value = udev_device_get_property_value(event->dev_db, key);
2306                         if (value != NULL) {
2307                                 struct udev_list_entry *entry;
2308
2309                                 entry = udev_device_add_property(event->dev, key, value);
2310                                 udev_list_entry_set_num(entry, true);
2311                         } else {
2312                                 if (cur->key.op != OP_NOMATCH)
2313                                         goto nomatch;
2314                         }
2315                         break;
2316                 }
2317                 case TK_M_IMPORT_CMDLINE: {
2318                         FILE *f;
2319                         bool imported = false;
2320
2321                         f = fopen("/proc/cmdline", "r");
2322                         if (f != NULL) {
2323                                 char cmdline[4096];
2324
2325                                 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
2326                                         const char *key = &rules->buf[cur->key.value_off];
2327                                         char *pos;
2328
2329                                         pos = strstr(cmdline, key);
2330                                         if (pos != NULL) {
2331                                                 struct udev_list_entry *entry;
2332
2333                                                 pos += strlen(key);
2334                                                 if (pos[0] == '\0' || isspace(pos[0])) {
2335                                                         /* we import simple flags as 'FLAG=1' */
2336                                                         entry = udev_device_add_property(event->dev, key, "1");
2337                                                         udev_list_entry_set_num(entry, true);
2338                                                         imported = true;
2339                                                 } else if (pos[0] == '=') {
2340                                                         const char *value;
2341
2342                                                         pos++;
2343                                                         value = pos;
2344                                                         while (pos[0] != '\0' && !isspace(pos[0]))
2345                                                                 pos++;
2346                                                         pos[0] = '\0';
2347                                                         entry = udev_device_add_property(event->dev, key, value);
2348                                                         udev_list_entry_set_num(entry, true);
2349                                                         imported = true;
2350                                                 }
2351                                         }
2352                                 }
2353                                 fclose(f);
2354                         }
2355                         if (!imported && cur->key.op != OP_NOMATCH)
2356                                 goto nomatch;
2357                         break;
2358                 }
2359                 case TK_M_IMPORT_PARENT: {
2360                         char import[UTIL_PATH_SIZE];
2361
2362                         udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2363                         if (import_parent_into_properties(event->dev, import) != 0)
2364                                 if (cur->key.op != OP_NOMATCH)
2365                                         goto nomatch;
2366                         break;
2367                 }
2368                 case TK_M_RESULT:
2369                         if (match_key(rules, cur, event->program_result) != 0)
2370                                 goto nomatch;
2371                         break;
2372                 case TK_A_STRING_ESCAPE_NONE:
2373                         esc = ESCAPE_NONE;
2374                         break;
2375                 case TK_A_STRING_ESCAPE_REPLACE:
2376                         esc = ESCAPE_REPLACE;
2377                         break;
2378                 case TK_A_DB_PERSIST:
2379                         udev_device_set_db_persist(event->dev);
2380                         break;
2381                 case TK_A_INOTIFY_WATCH:
2382                         if (event->inotify_watch_final)
2383                                 break;
2384                         if (cur->key.op == OP_ASSIGN_FINAL)
2385                                 event->inotify_watch_final = true;
2386                         event->inotify_watch = cur->key.watch;
2387                         break;
2388                 case TK_A_DEVLINK_PRIO:
2389                         udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2390                         break;
2391                 case TK_A_OWNER: {
2392                         char owner[UTIL_NAME_SIZE];
2393
2394                         if (event->owner_final)
2395                                 break;
2396                         if (cur->key.op == OP_ASSIGN_FINAL)
2397                                 event->owner_final = true;
2398                         udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2399                         event->uid = util_lookup_user(event->udev, owner);
2400                         log_debug("OWNER %u %s:%u\n",
2401                                   event->uid,
2402                                   &rules->buf[rule->rule.filename_off],
2403                                   rule->rule.filename_line);
2404                         break;
2405                 }
2406                 case TK_A_GROUP: {
2407                         char group[UTIL_NAME_SIZE];
2408
2409                         if (event->group_final)
2410                                 break;
2411                         if (cur->key.op == OP_ASSIGN_FINAL)
2412                                 event->group_final = true;
2413                         udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2414                         event->gid = util_lookup_group(event->udev, group);
2415                         log_debug("GROUP %u %s:%u\n",
2416                                   event->gid,
2417                                   &rules->buf[rule->rule.filename_off],
2418                                   rule->rule.filename_line);
2419                         break;
2420                 }
2421                 case TK_A_MODE: {
2422                         char mode_str[UTIL_NAME_SIZE];
2423                         mode_t mode;
2424                         char *endptr;
2425
2426                         if (event->mode_final)
2427                                 break;
2428                         udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode_str, sizeof(mode_str));
2429                         mode = strtol(mode_str, &endptr, 8);
2430                         if (endptr[0] != '\0') {
2431                                 log_error("ignoring invalid mode '%s'\n", mode_str);
2432                                 break;
2433                         }
2434                         if (cur->key.op == OP_ASSIGN_FINAL)
2435                                 event->mode_final = true;
2436                         event->mode_set = true;
2437                         event->mode = mode;
2438                         log_debug("MODE %#o %s:%u\n",
2439                                   event->mode,
2440                                   &rules->buf[rule->rule.filename_off],
2441                                   rule->rule.filename_line);
2442                         break;
2443                 }
2444                 case TK_A_OWNER_ID:
2445                         if (event->owner_final)
2446                                 break;
2447                         if (cur->key.op == OP_ASSIGN_FINAL)
2448                                 event->owner_final = true;
2449                         event->uid = cur->key.uid;
2450                         log_debug("OWNER %u %s:%u\n",
2451                                   event->uid,
2452                                   &rules->buf[rule->rule.filename_off],
2453                                   rule->rule.filename_line);
2454                         break;
2455                 case TK_A_GROUP_ID:
2456                         if (event->group_final)
2457                                 break;
2458                         if (cur->key.op == OP_ASSIGN_FINAL)
2459                                 event->group_final = true;
2460                         event->gid = cur->key.gid;
2461                         log_debug("GROUP %u %s:%u\n",
2462                                   event->gid,
2463                                   &rules->buf[rule->rule.filename_off],
2464                                   rule->rule.filename_line);
2465                         break;
2466                 case TK_A_MODE_ID:
2467                         if (event->mode_final)
2468                                 break;
2469                         if (cur->key.op == OP_ASSIGN_FINAL)
2470                                 event->mode_final = true;
2471                         event->mode_set = true;
2472                         event->mode = cur->key.mode;
2473                         log_debug("MODE %#o %s:%u\n",
2474                                   event->mode,
2475                                   &rules->buf[rule->rule.filename_off],
2476                                   rule->rule.filename_line);
2477                         break;
2478                 case TK_A_ENV: {
2479                         const char *name = &rules->buf[cur->key.attr_off];
2480                         char *value = &rules->buf[cur->key.value_off];
2481
2482                         if (value[0] != '\0') {
2483                                 char temp_value[UTIL_NAME_SIZE];
2484                                 struct udev_list_entry *entry;
2485
2486                                 udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2487                                 entry = udev_device_add_property(event->dev, name, temp_value);
2488                                 /* store in db, skip private keys */
2489                                 if (name[0] != '.')
2490                                         udev_list_entry_set_num(entry, true);
2491                         } else {
2492                                 udev_device_add_property(event->dev, name, NULL);
2493                         }
2494                         break;
2495                 }
2496                 case TK_A_TAG: {
2497                         char tag[UTIL_PATH_SIZE];
2498                         const char *p;
2499
2500                         udev_event_apply_format(event, &rules->buf[cur->key.value_off], tag, sizeof(tag));
2501                         if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2502                                 udev_device_cleanup_tags_list(event->dev);
2503                         for (p = tag; *p != '\0'; p++) {
2504                                 if ((*p >= 'a' && *p <= 'z') ||
2505                                     (*p >= 'A' && *p <= 'Z') ||
2506                                     (*p >= '0' && *p <= '9') ||
2507                                     *p == '-' || *p == '_')
2508                                         continue;
2509                                 log_error("ignoring invalid tag name '%s'\n", tag);
2510                                 break;
2511                         }
2512                         udev_device_add_tag(event->dev, tag);
2513                         break;
2514                 }
2515                 case TK_A_NAME: {
2516                         const char *name  = &rules->buf[cur->key.value_off];
2517
2518                         char name_str[UTIL_PATH_SIZE];
2519                         int count;
2520
2521                         if (event->name_final)
2522                                 break;
2523                         if (cur->key.op == OP_ASSIGN_FINAL)
2524                                 event->name_final = true;
2525                         udev_event_apply_format(event, name, name_str, sizeof(name_str));
2526                         if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2527                                 count = util_replace_chars(name_str, "/");
2528                                 if (count > 0)
2529                                         log_debug("%i character(s) replaced\n", count);
2530                         }
2531                         if (major(udev_device_get_devnum(event->dev)) &&
2532                             (!streq(name_str, udev_device_get_devnode(event->dev) + strlen(TEST_PREFIX "/dev/")))) {
2533                                 log_error("NAME=\"%s\" ignored, kernel device nodes "
2534                                     "can not be renamed; please fix it in %s:%u\n", name,
2535                                     &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2536                                 break;
2537                         }
2538                         free(event->name);
2539                         event->name = strdup(name_str);
2540                         log_debug("NAME '%s' %s:%u\n",
2541                                   event->name,
2542                                   &rules->buf[rule->rule.filename_off],
2543                                   rule->rule.filename_line);
2544                         break;
2545                 }
2546                 case TK_A_DEVLINK: {
2547                         char temp[UTIL_PATH_SIZE];
2548                         char filename[UTIL_PATH_SIZE];
2549                         char *pos, *next;
2550                         int count = 0;
2551
2552                         if (event->devlink_final)
2553                                 break;
2554                         if (major(udev_device_get_devnum(event->dev)) == 0)
2555                                 break;
2556                         if (cur->key.op == OP_ASSIGN_FINAL)
2557                                 event->devlink_final = true;
2558                         if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2559                                 udev_device_cleanup_devlinks_list(event->dev);
2560
2561                         /* allow  multiple symlinks separated by spaces */
2562                         udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2563                         if (esc == ESCAPE_UNSET)
2564                                 count = util_replace_chars(temp, "/ ");
2565                         else if (esc == ESCAPE_REPLACE)
2566                                 count = util_replace_chars(temp, "/");
2567                         if (count > 0)
2568                                 log_debug("%i character(s) replaced\n" , count);
2569                         pos = temp;
2570                         while (isspace(pos[0]))
2571                                 pos++;
2572                         next = strchr(pos, ' ');
2573                         while (next != NULL) {
2574                                 next[0] = '\0';
2575                                 log_debug("LINK '%s' %s:%u\n", pos,
2576                                           &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2577                                 util_strscpyl(filename, sizeof(filename), TEST_PREFIX "/dev/", pos, NULL);
2578                                 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2579                                 while (isspace(next[1]))
2580                                         next++;
2581                                 pos = &next[1];
2582                                 next = strchr(pos, ' ');
2583                         }
2584                         if (pos[0] != '\0') {
2585                                 log_debug("LINK '%s' %s:%u\n", pos,
2586                                           &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2587                                 util_strscpyl(filename, sizeof(filename), TEST_PREFIX "/dev/", pos, NULL);
2588                                 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2589                         }
2590                         break;
2591                 }
2592                 case TK_A_ATTR: {
2593                         const char *key_name = &rules->buf[cur->key.attr_off];
2594                         char attr[UTIL_PATH_SIZE];
2595                         char value[UTIL_NAME_SIZE];
2596                         FILE *f;
2597
2598                         if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2599                                 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2600                         attr_subst_subdir(attr, sizeof(attr));
2601
2602                         udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2603                         log_debug("ATTR '%s' writing '%s' %s:%u\n", attr, value,
2604                                   &rules->buf[rule->rule.filename_off],
2605                                   rule->rule.filename_line);
2606                         f = fopen(attr, "w");
2607                         if (f != NULL) {
2608                                 if (fprintf(f, "%s", value) <= 0)
2609                                         log_error("error writing ATTR{%s}: %m\n", attr);
2610                                 fclose(f);
2611                         } else {
2612                                 log_error("error opening ATTR{%s} for writing: %m\n", attr);
2613                         }
2614                         break;
2615                 }
2616                 case TK_A_RUN_BUILTIN:
2617                 case TK_A_RUN_PROGRAM: {
2618                         struct udev_list_entry *entry;
2619
2620                         if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2621                                 udev_list_cleanup(&event->run_list);
2622                         log_debug("RUN '%s' %s:%u\n",
2623                                   &rules->buf[cur->key.value_off],
2624                                   &rules->buf[rule->rule.filename_off],
2625                                   rule->rule.filename_line);
2626                         entry = udev_list_entry_add(&event->run_list, &rules->buf[cur->key.value_off], NULL);
2627                         udev_list_entry_set_num(entry, cur->key.builtin_cmd);
2628                         break;
2629                 }
2630                 case TK_A_GOTO:
2631                         if (cur->key.rule_goto == 0)
2632                                 break;
2633                         cur = &rules->tokens[cur->key.rule_goto];
2634                         continue;
2635                 case TK_END:
2636                         return 0;
2637
2638                 case TK_M_PARENTS_MIN:
2639                 case TK_M_PARENTS_MAX:
2640                 case TK_M_MAX:
2641                 case TK_UNSET:
2642                         log_error("wrong type %u\n", cur->type);
2643                         goto nomatch;
2644                 }
2645
2646                 cur++;
2647                 continue;
2648         nomatch:
2649                 /* fast-forward to next rule */
2650                 cur = rule + rule->rule.token_count;
2651         }
2652 }
2653
2654 void udev_rules_apply_static_dev_perms(struct udev_rules *rules)
2655 {
2656         struct token *cur;
2657         struct token *rule;
2658         uid_t uid = 0;
2659         gid_t gid = 0;
2660         mode_t mode = 0;
2661
2662         if (rules->tokens == NULL)
2663                 return;
2664
2665         cur = &rules->tokens[0];
2666         rule = cur;
2667         for (;;) {
2668                 switch (cur->type) {
2669                 case TK_RULE:
2670                         /* current rule */
2671                         rule = cur;
2672
2673                         /* skip rules without a static_node tag */
2674                         if (!rule->rule.has_static_node)
2675                                 goto next;
2676
2677                         uid = 0;
2678                         gid = 0;
2679                         mode = 0;
2680                         break;
2681                 case TK_A_OWNER_ID:
2682                         uid = cur->key.uid;
2683                         break;
2684                 case TK_A_GROUP_ID:
2685                         gid = cur->key.gid;
2686                         break;
2687                 case TK_A_MODE_ID:
2688                         mode = cur->key.mode;
2689                         break;
2690                 case TK_A_STATIC_NODE: {
2691                         char filename[UTIL_PATH_SIZE];
2692                         struct stat stats;
2693
2694                         /* we assure, that the permissions tokens are sorted before the static token */
2695                         if (mode == 0 && uid == 0 && gid == 0)
2696                                 goto next;
2697                         util_strscpyl(filename, sizeof(filename), TEST_PREFIX "/dev/",
2698                                       &rules->buf[cur->key.value_off], NULL);
2699                         if (stat(filename, &stats) != 0)
2700                                 goto next;
2701                         if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2702                                 goto next;
2703                         if (mode == 0) {
2704                                 if (gid > 0)
2705                                         mode = 0660;
2706                                 else
2707                                         mode = 0600;
2708                         }
2709                         if (mode != (stats.st_mode & 01777)) {
2710                                 chmod(filename, mode);
2711                                 log_debug("chmod '%s' %#o\n", filename, mode);
2712                         }
2713
2714                         if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
2715                                 chown(filename, uid, gid);
2716                                 log_debug("chown '%s' %u %u\n", filename, uid, gid);
2717                         }
2718
2719                         utimensat(AT_FDCWD, filename, NULL, 0);
2720                         break;
2721                 }
2722                 case TK_END:
2723                         return;
2724                 }
2725
2726                 cur++;
2727                 continue;
2728 next:
2729                 /* fast-forward to next rule */
2730                 cur = rule + rule->rule.token_count;
2731                 continue;
2732         }
2733 }