src/shared/conf-parser.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4 #include <limits.h>
   5 #include <stdint.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <sys/types.h>
   9
  10 #include "alloc-util.h"
  11 #include "conf-files.h"
  12 #include "conf-parser.h"
  13 #include "def.h"
  14 #include "extract-word.h"
  15 #include "fd-util.h"
  16 #include "fileio.h"
  17 #include "fs-util.h"
  18 #include "log.h"
  19 #include "macro.h"
  20 #include "missing_network.h"
  21 #include "nulstr-util.h"
  22 #include "parse-util.h"
  23 #include "path-util.h"
  24 #include "process-util.h"
  25 #include "rlimit-util.h"
  26 #include "signal-util.h"
  27 #include "socket-util.h"
  28 #include "string-util.h"
  29 #include "strv.h"
  30 #include "syslog-util.h"
  31 #include "time-util.h"
  32 #include "utf8.h"
  33
  34 int config_item_table_lookup(
  35                 const void *table,
  36                 const char *section,
  37                 const char *lvalue,
  38                 ConfigParserCallback *func,
  39                 int *ltype,
  40                 void **data,
  41                 void *userdata) {
  42
  43         const ConfigTableItem *t;
  44
  45         assert(table);
  46         assert(lvalue);
  47         assert(func);
  48         assert(ltype);
  49         assert(data);
  50
  51         for (t = table; t->lvalue; t++) {
  52
  53                 if (!streq(lvalue, t->lvalue))
  54                         continue;
  55
  56                 if (!streq_ptr(section, t->section))
  57                         continue;
  58
  59                 *func = t->parse;
  60                 *ltype = t->ltype;
  61                 *data = t->data;
  62                 return 1;
  63         }
  64
  65         return 0;
  66 }
  67
  68 int config_item_perf_lookup(
  69                 const void *table,
  70                 const char *section,
  71                 const char *lvalue,
  72                 ConfigParserCallback *func,
  73                 int *ltype,
  74                 void **data,
  75                 void *userdata) {
  76
  77         ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
  78         const ConfigPerfItem *p;
  79
  80         assert(table);
  81         assert(lvalue);
  82         assert(func);
  83         assert(ltype);
  84         assert(data);
  85
  86         if (section) {
  87                 const char *key;
  88
  89                 key = strjoina(section, ".", lvalue);
  90                 p = lookup(key, strlen(key));
  91         } else
  92                 p = lookup(lvalue, strlen(lvalue));
  93         if (!p)
  94                 return 0;
  95
  96         *func = p->parse;
  97         *ltype = p->ltype;
  98         *data = (uint8_t*) userdata + p->offset;
  99         return 1;
 100 }
 101
 102 /* Run the user supplied parser for an assignment */
 103 static int next_assignment(
 104                 const char *unit,
 105                 const char *filename,
 106                 unsigned line,
 107                 ConfigItemLookup lookup,
 108                 const void *table,
 109                 const char *section,
 110                 unsigned section_line,
 111                 const char *lvalue,
 112                 const char *rvalue,
 113                 ConfigParseFlags flags,
 114                 void *userdata) {
 115
 116         ConfigParserCallback func = NULL;
 117         int ltype = 0;
 118         void *data = NULL;
 119         int r;
 120
 121         assert(filename);
 122         assert(line > 0);
 123         assert(lookup);
 124         assert(lvalue);
 125         assert(rvalue);
 126
 127         r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
 128         if (r < 0)
 129                 return r;
 130         if (r > 0) {
 131                 if (func)
 132                         return func(unit, filename, line, section, section_line,
 133                                     lvalue, ltype, rvalue, data, userdata);
 134
 135                 return 0;
 136         }
 137
 138         /* Warn about unknown non-extension fields. */
 139         if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(lvalue, "X-"))
 140                 log_syntax(unit, LOG_WARNING, filename, line, 0,
 141                            "Unknown key name '%s' in section '%s', ignoring.", lvalue, section);
 142
 143         return 0;
 144 }
 145
 146 /* Parse a single logical line */
 147 static int parse_line(
 148                 const char* unit,
 149                 const char *filename,
 150                 unsigned line,
 151                 const char *sections,
 152                 ConfigItemLookup lookup,
 153                 const void *table,
 154                 ConfigParseFlags flags,
 155                 char **section,
 156                 unsigned *section_line,
 157                 bool *section_ignored,
 158                 char *l,
 159                 void *userdata) {
 160
 161         char *e, *include;
 162
 163         assert(filename);
 164         assert(line > 0);
 165         assert(lookup);
 166         assert(l);
 167
 168         l = strstrip(l);
 169         if (!*l)
 170                 return 0;
 171
 172         if (*l == '\n')
 173                 return 0;
 174
 175         include = first_word(l, ".include");
 176         if (include) {
 177                 _cleanup_free_ char *fn = NULL;
 178
 179                 /* .includes are a bad idea, we only support them here
 180                  * for historical reasons. They create cyclic include
 181                  * problems and make it difficult to detect
 182                  * configuration file changes with an easy
 183                  * stat(). Better approaches, such as .d/ drop-in
 184                  * snippets exist.
 185                  *
 186                  * Support for them should be eventually removed. */
 187
 188                 if (!(flags & CONFIG_PARSE_ALLOW_INCLUDE)) {
 189                         log_syntax(unit, LOG_ERR, filename, line, 0, ".include not allowed here. Ignoring.");
 190                         return 0;
 191                 }
 192
 193                 log_syntax(unit, LOG_WARNING, filename, line, 0,
 194                            ".include directives are deprecated, and support for them will be removed in a future version of systemd. "
 195                            "Please use drop-in files instead.");
 196
 197                 fn = file_in_same_dir(filename, strstrip(include));
 198                 if (!fn)
 199                         return -ENOMEM;
 200
 201                 return config_parse(unit, fn, NULL, sections, lookup, table, flags, userdata);
 202         }
 203
 204         if (!utf8_is_valid(l))
 205                 return log_syntax_invalid_utf8(unit, LOG_WARNING, filename, line, l);
 206
 207         if (*l == '[') {
 208                 size_t k;
 209                 char *n;
 210
 211                 k = strlen(l);
 212                 assert(k > 0);
 213
 214                 if (l[k-1] != ']') {
 215                         log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid section header '%s'", l);
 216                         return -EBADMSG;
 217                 }
 218
 219                 n = strndup(l+1, k-2);
 220                 if (!n)
 221                         return -ENOMEM;
 222
 223                 if (sections && !nulstr_contains(sections, n)) {
 224                         bool ignore = flags & CONFIG_PARSE_RELAXED;
 225                         const char *t;
 226
 227                         ignore = ignore || startswith(n, "X-");
 228
 229                         if (!ignore)
 230                                 NULSTR_FOREACH(t, sections)
 231                                         if (streq_ptr(n, startswith(t, "-"))) {
 232                                                 ignore = true;
 233                                                 break;
 234                                         }
 235
 236                         if (!ignore)
 237                                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown section '%s'. Ignoring.", n);
 238
 239                         free(n);
 240                         *section = mfree(*section);
 241                         *section_line = 0;
 242                         *section_ignored = true;
 243                 } else {
 244                         free_and_replace(*section, n);
 245                         *section_line = line;
 246                         *section_ignored = false;
 247                 }
 248
 249                 return 0;
 250         }
 251
 252         if (sections && !*section) {
 253                 if (!(flags & CONFIG_PARSE_RELAXED) && !*section_ignored)
 254                         log_syntax(unit, LOG_WARNING, filename, line, 0, "Assignment outside of section. Ignoring.");
 255
 256                 return 0;
 257         }
 258
 259         e = strchr(l, '=');
 260         if (!e)
 261                 return log_syntax(unit, LOG_WARNING, filename, line, 0,
 262                                   "Missing '=', ignoring line.");
 263         if (e == l)
 264                 return log_syntax(unit, LOG_WARNING, filename, line, 0,
 265                                   "Missing key name before '=', ignoring line.");
 266
 267         *e = 0;
 268         e++;
 269
 270         return next_assignment(unit,
 271                                filename,
 272                                line,
 273                                lookup,
 274                                table,
 275                                *section,
 276                                *section_line,
 277                                strstrip(l),
 278                                strstrip(e),
 279                                flags,
 280                                userdata);
 281 }
 282
 283 /* Go through the file and parse each line */
 284 int config_parse(const char *unit,
 285                  const char *filename,
 286                  FILE *f,
 287                  const char *sections,
 288                  ConfigItemLookup lookup,
 289                  const void *table,
 290                  ConfigParseFlags flags,
 291                  void *userdata) {
 292
 293         _cleanup_free_ char *section = NULL, *continuation = NULL;
 294         _cleanup_fclose_ FILE *ours = NULL;
 295         unsigned line = 0, section_line = 0;
 296         bool section_ignored = false, bom_seen = false;
 297         int r, fd;
 298
 299         assert(filename);
 300         assert(lookup);
 301
 302         if (!f) {
 303                 f = ours = fopen(filename, "re");
 304                 if (!f) {
 305                         /* Only log on request, except for ENOENT,
 306                          * since we return 0 to the caller. */
 307                         if ((flags & CONFIG_PARSE_WARN) || errno == ENOENT)
 308                                 log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_ERR, errno,
 309                                                "Failed to open configuration file '%s': %m", filename);
 310                         return errno == ENOENT ? 0 : -errno;
 311                 }
 312         }
 313
 314         fd = fileno(f);
 315         if (fd >= 0) /* stream might not have an fd, let's be careful hence */
 316                 fd_warn_permissions(filename, fd);
 317
 318         for (;;) {
 319                 _cleanup_free_ char *buf = NULL;
 320                 bool escaped = false;
 321                 char *l, *p, *e;
 322
 323                 r = read_line(f, LONG_LINE_MAX, &buf);
 324                 if (r == 0)
 325                         break;
 326                 if (r == -ENOBUFS) {
 327                         if (flags & CONFIG_PARSE_WARN)
 328                                 log_error_errno(r, "%s:%u: Line too long", filename, line);
 329
 330                         return r;
 331                 }
 332                 if (r < 0) {
 333                         if (CONFIG_PARSE_WARN)
 334                                 log_error_errno(r, "%s:%u: Error while reading configuration file: %m", filename, line);
 335
 336                         return r;
 337                 }
 338
 339                 line++;
 340
 341                 l = skip_leading_chars(buf, WHITESPACE);
 342                 if (*l != '\0' && strchr(COMMENTS, *l))
 343                         continue;
 344
 345                 l = buf;
 346                 if (!bom_seen) {
 347                         char *q;
 348
 349                         q = startswith(buf, UTF8_BYTE_ORDER_MARK);
 350                         if (q) {
 351                                 l = q;
 352                                 bom_seen = true;
 353                         }
 354                 }
 355
 356                 if (continuation) {
 357                         if (strlen(continuation) + strlen(l) > LONG_LINE_MAX) {
 358                                 if (flags & CONFIG_PARSE_WARN)
 359                                         log_error("%s:%u: Continuation line too long", filename, line);
 360                                 return -ENOBUFS;
 361                         }
 362
 363                         if (!strextend(&continuation, l, NULL)) {
 364                                 if (flags & CONFIG_PARSE_WARN)
 365                                         log_oom();
 366                                 return -ENOMEM;
 367                         }
 368
 369                         p = continuation;
 370                 } else
 371                         p = l;
 372
 373                 for (e = p; *e; e++) {
 374                         if (escaped)
 375                                 escaped = false;
 376                         else if (*e == '\\')
 377                                 escaped = true;
 378                 }
 379
 380                 if (escaped) {
 381                         *(e-1) = ' ';
 382
 383                         if (!continuation) {
 384                                 continuation = strdup(l);
 385                                 if (!continuation) {
 386                                         if (flags & CONFIG_PARSE_WARN)
 387                                                 log_oom();
 388                                         return -ENOMEM;
 389                                 }
 390                         }
 391
 392                         continue;
 393                 }
 394
 395                 r = parse_line(unit,
 396                                filename,
 397                                line,
 398                                sections,
 399                                lookup,
 400                                table,
 401                                flags,
 402                                &section,
 403                                &section_line,
 404                                &section_ignored,
 405                                p,
 406                                userdata);
 407                 if (r < 0) {
 408                         if (flags & CONFIG_PARSE_WARN)
 409                                 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
 410                         return r;
 411                 }
 412
 413                 continuation = mfree(continuation);
 414         }
 415
 416         if (continuation) {
 417                 r = parse_line(unit,
 418                                filename,
 419                                ++line,
 420                                sections,
 421                                lookup,
 422                                table,
 423                                flags,
 424                                &section,
 425                                &section_line,
 426                                &section_ignored,
 427                                continuation,
 428                                userdata);
 429                 if (r < 0) {
 430                         if (flags & CONFIG_PARSE_WARN)
 431                                 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
 432                         return r;
 433                 }
 434         }
 435
 436         return 0;
 437 }
 438
 439 static int config_parse_many_files(
 440                 const char *conf_file,
 441                 char **files,
 442                 const char *sections,
 443                 ConfigItemLookup lookup,
 444                 const void *table,
 445                 ConfigParseFlags flags,
 446                 void *userdata) {
 447
 448         char **fn;
 449         int r;
 450
 451         if (conf_file) {
 452                 r = config_parse(NULL, conf_file, NULL, sections, lookup, table, flags, userdata);
 453                 if (r < 0)
 454                         return r;
 455         }
 456
 457         STRV_FOREACH(fn, files) {
 458                 r = config_parse(NULL, *fn, NULL, sections, lookup, table, flags, userdata);
 459                 if (r < 0)
 460                         return r;
 461         }
 462
 463         return 0;
 464 }
 465
 466 /* Parse each config file in the directories specified as nulstr. */
 467 int config_parse_many_nulstr(
 468                 const char *conf_file,
 469                 const char *conf_file_dirs,
 470                 const char *sections,
 471                 ConfigItemLookup lookup,
 472                 const void *table,
 473                 ConfigParseFlags flags,
 474                 void *userdata) {
 475
 476         _cleanup_strv_free_ char **files = NULL;
 477         int r;
 478
 479         r = conf_files_list_nulstr(&files, ".conf", NULL, 0, conf_file_dirs);
 480         if (r < 0)
 481                 return r;
 482
 483         return config_parse_many_files(conf_file, files, sections, lookup, table, flags, userdata);
 484 }
 485
 486 /* Parse each config file in the directories specified as strv. */
 487 int config_parse_many(
 488                 const char *conf_file,
 489                 const char* const* conf_file_dirs,
 490                 const char *dropin_dirname,
 491                 const char *sections,
 492                 ConfigItemLookup lookup,
 493                 const void *table,
 494                 ConfigParseFlags flags,
 495                 void *userdata) {
 496
 497         _cleanup_strv_free_ char **dropin_dirs = NULL;
 498         _cleanup_strv_free_ char **files = NULL;
 499         const char *suffix;
 500         int r;
 501
 502         suffix = strjoina("/", dropin_dirname);
 503         r = strv_extend_strv_concat(&dropin_dirs, (char**) conf_file_dirs, suffix);
 504         if (r < 0)
 505                 return r;
 506
 507         r = conf_files_list_strv(&files, ".conf", NULL, 0, (const char* const*) dropin_dirs);
 508         if (r < 0)
 509                 return r;
 510
 511         return config_parse_many_files(conf_file, files, sections, lookup, table, flags, userdata);
 512 }
 513
 514 #define DEFINE_PARSER(type, vartype, conv_func)                         \
 515         DEFINE_CONFIG_PARSE_PTR(config_parse_##type, conv_func, vartype, "Failed to parse " #type " value")
 516
 517 DEFINE_PARSER(int, int, safe_atoi);
 518 DEFINE_PARSER(long, long, safe_atoli);
 519 DEFINE_PARSER(uint8, uint8_t, safe_atou8);
 520 DEFINE_PARSER(uint16, uint16_t, safe_atou16);
 521 DEFINE_PARSER(uint32, uint32_t, safe_atou32);
 522 DEFINE_PARSER(int32, int32_t, safe_atoi32);
 523 DEFINE_PARSER(uint64, uint64_t, safe_atou64);
 524 DEFINE_PARSER(unsigned, unsigned, safe_atou);
 525 DEFINE_PARSER(double, double, safe_atod);
 526 DEFINE_PARSER(nsec, nsec_t, parse_nsec);
 527 DEFINE_PARSER(sec, usec_t, parse_sec);
 528 DEFINE_PARSER(sec_def_infinity, usec_t, parse_sec_def_infinity);
 529 DEFINE_PARSER(mode, mode_t, parse_mode);
 530
 531 int config_parse_iec_size(const char* unit,
 532                             const char *filename,
 533                             unsigned line,
 534                             const char *section,
 535                             unsigned section_line,
 536                             const char *lvalue,
 537                             int ltype,
 538                             const char *rvalue,
 539                             void *data,
 540                             void *userdata) {
 541
 542         size_t *sz = data;
 543         uint64_t v;
 544         int r;
 545
 546         assert(filename);
 547         assert(lvalue);
 548         assert(rvalue);
 549         assert(data);
 550
 551         r = parse_size(rvalue, 1024, &v);
 552         if (r >= 0 && (uint64_t) (size_t) v != v)
 553                 r = -ERANGE;
 554         if (r < 0) {
 555                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value '%s', ignoring: %m", rvalue);
 556                 return 0;
 557         }
 558
 559         *sz = (size_t) v;
 560         return 0;
 561 }
 562
 563 int config_parse_si_uint64(
 564                 const char* unit,
 565                 const char *filename,
 566                 unsigned line,
 567                 const char *section,
 568                 unsigned section_line,
 569                 const char *lvalue,
 570                 int ltype,
 571                 const char *rvalue,
 572                 void *data,
 573                 void *userdata) {
 574
 575         uint64_t *sz = data;
 576         int r;
 577
 578         assert(filename);
 579         assert(lvalue);
 580         assert(rvalue);
 581         assert(data);
 582
 583         r = parse_size(rvalue, 1000, sz);
 584         if (r < 0) {
 585                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value '%s', ignoring: %m", rvalue);
 586                 return 0;
 587         }
 588
 589         return 0;
 590 }
 591
 592 int config_parse_iec_uint64(
 593                 const char* unit,
 594                 const char *filename,
 595                 unsigned line,
 596                 const char *section,
 597                 unsigned section_line,
 598                 const char *lvalue,
 599                 int ltype,
 600                 const char *rvalue,
 601                 void *data,
 602                 void *userdata) {
 603
 604         uint64_t *bytes = data;
 605         int r;
 606
 607         assert(filename);
 608         assert(lvalue);
 609         assert(rvalue);
 610         assert(data);
 611
 612         r = parse_size(rvalue, 1024, bytes);
 613         if (r < 0)
 614                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 615
 616         return 0;
 617 }
 618
 619 int config_parse_bool(const char* unit,
 620                       const char *filename,
 621                       unsigned line,
 622                       const char *section,
 623                       unsigned section_line,
 624                       const char *lvalue,
 625                       int ltype,
 626                       const char *rvalue,
 627                       void *data,
 628                       void *userdata) {
 629
 630         int k;
 631         bool *b = data;
 632         bool fatal = ltype;
 633
 634         assert(filename);
 635         assert(lvalue);
 636         assert(rvalue);
 637         assert(data);
 638
 639         k = parse_boolean(rvalue);
 640         if (k < 0) {
 641                 log_syntax(unit, LOG_ERR, filename, line, k,
 642                            "Failed to parse boolean value%s: %s",
 643                            fatal ? "" : ", ignoring", rvalue);
 644                 return fatal ? -ENOEXEC : 0;
 645         }
 646
 647         *b = k;
 648         return 0;
 649 }
 650
 651 int config_parse_tristate(
 652                 const char* unit,
 653                 const char *filename,
 654                 unsigned line,
 655                 const char *section,
 656                 unsigned section_line,
 657                 const char *lvalue,
 658                 int ltype,
 659                 const char *rvalue,
 660                 void *data,
 661                 void *userdata) {
 662
 663         int k, *t = data;
 664
 665         assert(filename);
 666         assert(lvalue);
 667         assert(rvalue);
 668         assert(data);
 669
 670         /* A tristate is pretty much a boolean, except that it can
 671          * also take the special value -1, indicating "uninitialized",
 672          * much like NULL is for a pointer type. */
 673
 674         k = parse_boolean(rvalue);
 675         if (k < 0) {
 676                 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
 677                 return 0;
 678         }
 679
 680         *t = !!k;
 681         return 0;
 682 }
 683
 684 int config_parse_string(
 685                 const char *unit,
 686                 const char *filename,
 687                 unsigned line,
 688                 const char *section,
 689                 unsigned section_line,
 690                 const char *lvalue,
 691                 int ltype,
 692                 const char *rvalue,
 693                 void *data,
 694                 void *userdata) {
 695
 696         char **s = data;
 697
 698         assert(filename);
 699         assert(lvalue);
 700         assert(rvalue);
 701         assert(data);
 702
 703         if (free_and_strdup(s, empty_to_null(rvalue)) < 0)
 704                 return log_oom();
 705
 706         return 0;
 707 }
 708
 709 int config_parse_path(
 710                 const char *unit,
 711                 const char *filename,
 712                 unsigned line,
 713                 const char *section,
 714                 unsigned section_line,
 715                 const char *lvalue,
 716                 int ltype,
 717                 const char *rvalue,
 718                 void *data,
 719                 void *userdata) {
 720
 721         _cleanup_free_ char *n = NULL;
 722         bool fatal = ltype;
 723         char **s = data;
 724         int r;
 725
 726         assert(filename);
 727         assert(lvalue);
 728         assert(rvalue);
 729         assert(data);
 730
 731         if (isempty(rvalue))
 732                 goto finalize;
 733
 734         n = strdup(rvalue);
 735         if (!n)
 736                 return log_oom();
 737
 738         r = path_simplify_and_warn(n, PATH_CHECK_ABSOLUTE | (fatal ? PATH_CHECK_FATAL : 0), unit, filename, line, lvalue);
 739         if (r < 0)
 740                 return fatal ? -ENOEXEC : 0;
 741
 742 finalize:
 743         return free_and_replace(*s, n);
 744 }
 745
 746 int config_parse_strv(
 747                 const char *unit,
 748                 const char *filename,
 749                 unsigned line,
 750                 const char *section,
 751                 unsigned section_line,
 752                 const char *lvalue,
 753                 int ltype,
 754                 const char *rvalue,
 755                 void *data,
 756                 void *userdata) {
 757
 758         char ***sv = data;
 759         int r;
 760
 761         assert(filename);
 762         assert(lvalue);
 763         assert(rvalue);
 764         assert(data);
 765
 766         if (isempty(rvalue)) {
 767                 *sv = strv_free(*sv);
 768                 return 0;
 769         }
 770
 771         for (;;) {
 772                 char *word = NULL;
 773
 774                 r = extract_first_word(&rvalue, &word, NULL, EXTRACT_UNQUOTE|EXTRACT_RETAIN_ESCAPE);
 775                 if (r == 0)
 776                         break;
 777                 if (r == -ENOMEM)
 778                         return log_oom();
 779                 if (r < 0) {
 780                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
 781                         break;
 782                 }
 783
 784                 r = strv_consume(sv, word);
 785                 if (r < 0)
 786                         return log_oom();
 787         }
 788
 789         return 0;
 790 }
 791
 792 int config_parse_warn_compat(
 793                 const char *unit,
 794                 const char *filename,
 795                 unsigned line,
 796                 const char *section,
 797                 unsigned section_line,
 798                 const char *lvalue,
 799                 int ltype,
 800                 const char *rvalue,
 801                 void *data,
 802                 void *userdata) {
 803
 804         Disabled reason = ltype;
 805
 806         switch(reason) {
 807
 808         case DISABLED_CONFIGURATION:
 809                 log_syntax(unit, LOG_DEBUG, filename, line, 0,
 810                            "Support for option %s= has been disabled at compile time and it is ignored", lvalue);
 811                 break;
 812
 813         case DISABLED_LEGACY:
 814                 log_syntax(unit, LOG_INFO, filename, line, 0,
 815                            "Support for option %s= has been removed and it is ignored", lvalue);
 816                 break;
 817
 818         case DISABLED_EXPERIMENTAL:
 819                 log_syntax(unit, LOG_INFO, filename, line, 0,
 820                            "Support for option %s= has not yet been enabled and it is ignored", lvalue);
 821                 break;
 822         }
 823
 824         return 0;
 825 }
 826
 827 int config_parse_log_facility(
 828                 const char *unit,
 829                 const char *filename,
 830                 unsigned line,
 831                 const char *section,
 832                 unsigned section_line,
 833                 const char *lvalue,
 834                 int ltype,
 835                 const char *rvalue,
 836                 void *data,
 837                 void *userdata) {
 838
 839         int *o = data, x;
 840
 841         assert(filename);
 842         assert(lvalue);
 843         assert(rvalue);
 844         assert(data);
 845
 846         x = log_facility_unshifted_from_string(rvalue);
 847         if (x < 0) {
 848                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log facility, ignoring: %s", rvalue);
 849                 return 0;
 850         }
 851
 852         *o = (x << 3) | LOG_PRI(*o);
 853
 854         return 0;
 855 }
 856
 857 int config_parse_log_level(
 858                 const char *unit,
 859                 const char *filename,
 860                 unsigned line,
 861                 const char *section,
 862                 unsigned section_line,
 863                 const char *lvalue,
 864                 int ltype,
 865                 const char *rvalue,
 866                 void *data,
 867                 void *userdata) {
 868
 869         int *o = data, x;
 870
 871         assert(filename);
 872         assert(lvalue);
 873         assert(rvalue);
 874         assert(data);
 875
 876         x = log_level_from_string(rvalue);
 877         if (x < 0) {
 878                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log level, ignoring: %s", rvalue);
 879                 return 0;
 880         }
 881
 882         if (*o < 0) /* if it wasn't initialized so far, assume zero facility */
 883                 *o = x;
 884         else
 885                 *o = (*o & LOG_FACMASK) | x;
 886
 887         return 0;
 888 }
 889
 890 int config_parse_signal(
 891                 const char *unit,
 892                 const char *filename,
 893                 unsigned line,
 894                 const char *section,
 895                 unsigned section_line,
 896                 const char *lvalue,
 897                 int ltype,
 898                 const char *rvalue,
 899                 void *data,
 900                 void *userdata) {
 901
 902         int *sig = data, r;
 903
 904         assert(filename);
 905         assert(lvalue);
 906         assert(rvalue);
 907         assert(sig);
 908
 909         r = signal_from_string(rvalue);
 910         if (r <= 0) {
 911                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse signal name, ignoring: %s", rvalue);
 912                 return 0;
 913         }
 914
 915         *sig = r;
 916         return 0;
 917 }
 918
 919 int config_parse_personality(
 920                 const char *unit,
 921                 const char *filename,
 922                 unsigned line,
 923                 const char *section,
 924                 unsigned section_line,
 925                 const char *lvalue,
 926                 int ltype,
 927                 const char *rvalue,
 928                 void *data,
 929                 void *userdata) {
 930
 931         unsigned long *personality = data, p;
 932
 933         assert(filename);
 934         assert(lvalue);
 935         assert(rvalue);
 936         assert(personality);
 937
 938         if (isempty(rvalue))
 939                 p = PERSONALITY_INVALID;
 940         else {
 941                 p = personality_from_string(rvalue);
 942                 if (p == PERSONALITY_INVALID) {
 943                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse personality, ignoring: %s", rvalue);
 944                         return 0;
 945                 }
 946         }
 947
 948         *personality = p;
 949         return 0;
 950 }
 951
 952 int config_parse_ifname(
 953                 const char *unit,
 954                 const char *filename,
 955                 unsigned line,
 956                 const char *section,
 957                 unsigned section_line,
 958                 const char *lvalue,
 959                 int ltype,
 960                 const char *rvalue,
 961                 void *data,
 962                 void *userdata) {
 963
 964         char **s = data;
 965         int r;
 966
 967         assert(filename);
 968         assert(lvalue);
 969         assert(rvalue);
 970         assert(data);
 971
 972         if (isempty(rvalue)) {
 973                 *s = mfree(*s);
 974                 return 0;
 975         }
 976
 977         if (!ifname_valid(rvalue)) {
 978                 log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue);
 979                 return 0;
 980         }
 981
 982         r = free_and_strdup(s, rvalue);
 983         if (r < 0)
 984                 return log_oom();
 985
 986         return 0;
 987 }
 988
 989 int config_parse_ifnames(
 990                 const char *unit,
 991                 const char *filename,
 992                 unsigned line,
 993                 const char *section,
 994                 unsigned section_line,
 995                 const char *lvalue,
 996                 int ltype,
 997                 const char *rvalue,
 998                 void *data,
 999                 void *userdata) {
1000
1001         _cleanup_strv_free_ char **names = NULL;
1002         char ***s = data;
1003         const char *p;
1004         int r;
1005
1006         assert(filename);
1007         assert(lvalue);
1008         assert(rvalue);
1009         assert(data);
1010
1011         if (isempty(rvalue)) {
1012                 *s = strv_free(*s);
1013                 return 0;
1014         }
1015
1016         p = rvalue;
1017         for (;;) {
1018                 _cleanup_free_ char *word = NULL;
1019
1020                 r = extract_first_word(&p, &word, NULL, 0);
1021                 if (r < 0) {
1022                         log_syntax(unit, LOG_ERR, filename, line, r,
1023                                    "Failed to extract interface name, ignoring assignment: %s",
1024                                    rvalue);
1025                         return 0;
1026                 }
1027                 if (r == 0)
1028                         break;
1029
1030                 if (!ifname_valid_full(word, ltype)) {
1031                         log_syntax(unit, LOG_ERR, filename, line, 0,
1032                                    "Interface name is not valid or too long, ignoring assignment: %s",
1033                                    word);
1034                         continue;
1035                 }
1036
1037                 r = strv_consume(&names, TAKE_PTR(word));
1038                 if (r < 0)
1039                         return log_oom();
1040         }
1041
1042         r = strv_extend_strv(s, names, true);
1043         if (r < 0)
1044                 return log_oom();
1045
1046         return 0;
1047 }
1048
1049 int config_parse_ip_port(
1050                 const char *unit,
1051                 const char *filename,
1052                 unsigned line,
1053                 const char *section,
1054                 unsigned section_line,
1055                 const char *lvalue,
1056                 int ltype,
1057                 const char *rvalue,
1058                 void *data,
1059                 void *userdata) {
1060
1061         uint16_t *s = data;
1062         uint16_t port;
1063         int r;
1064
1065         assert(filename);
1066         assert(lvalue);
1067         assert(rvalue);
1068         assert(data);
1069
1070         if (isempty(rvalue)) {
1071                 *s = 0;
1072                 return 0;
1073         }
1074
1075         r = parse_ip_port(rvalue, &port);
1076         if (r < 0) {
1077                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse port '%s'.", rvalue);
1078                 return 0;
1079         }
1080
1081         *s = port;
1082
1083         return 0;
1084 }
1085
1086 int config_parse_mtu(
1087                 const char *unit,
1088                 const char *filename,
1089                 unsigned line,
1090                 const char *section,
1091                 unsigned section_line,
1092                 const char *lvalue,
1093                 int ltype,
1094                 const char *rvalue,
1095                 void *data,
1096                 void *userdata) {
1097
1098         uint32_t *mtu = data;
1099         int r;
1100
1101         assert(rvalue);
1102         assert(mtu);
1103
1104         r = parse_mtu(ltype, rvalue, mtu);
1105         if (r == -ERANGE) {
1106                 log_syntax(unit, LOG_ERR, filename, line, r,
1107                            "Maximum transfer unit (MTU) value out of range. Permitted range is %" PRIu32 "…%" PRIu32 ", ignoring: %s",
1108                            (uint32_t) (ltype == AF_INET6 ? IPV6_MIN_MTU : IPV4_MIN_MTU), (uint32_t) UINT32_MAX,
1109                            rvalue);
1110                 return 0;
1111         }
1112         if (r < 0) {
1113                 log_syntax(unit, LOG_ERR, filename, line, r,
1114                            "Failed to parse MTU value '%s', ignoring: %m", rvalue);
1115                 return 0;
1116         }
1117
1118         return 0;
1119 }
1120
1121 int config_parse_rlimit(
1122                 const char *unit,
1123                 const char *filename,
1124                 unsigned line,
1125                 const char *section,
1126                 unsigned section_line,
1127                 const char *lvalue,
1128                 int ltype,
1129                 const char *rvalue,
1130                 void *data,
1131                 void *userdata) {
1132
1133         struct rlimit **rl = data, d = {};
1134         int r;
1135
1136         assert(rvalue);
1137         assert(rl);
1138
1139         r = rlimit_parse(ltype, rvalue, &d);
1140         if (r == -EILSEQ) {
1141                 log_syntax(unit, LOG_WARNING, filename, line, r, "Soft resource limit chosen higher than hard limit, ignoring: %s", rvalue);
1142                 return 0;
1143         }
1144         if (r < 0) {
1145                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse resource value, ignoring: %s", rvalue);
1146                 return 0;
1147         }
1148
1149         if (rl[ltype])
1150                 *rl[ltype] = d;
1151         else {
1152                 rl[ltype] = newdup(struct rlimit, &d, 1);
1153                 if (!rl[ltype])
1154                         return log_oom();
1155         }
1156
1157         return 0;
1158 }
1159
1160 int config_parse_permille(const char* unit,
1161                           const char *filename,
1162                           unsigned line,
1163                           const char *section,
1164                           unsigned section_line,
1165                           const char *lvalue,
1166                           int ltype,
1167                           const char *rvalue,
1168                           void *data,
1169                           void *userdata) {
1170
1171         unsigned *permille = data;
1172         int r;
1173
1174         assert(filename);
1175         assert(lvalue);
1176         assert(rvalue);
1177         assert(permille);
1178
1179         r = parse_permille(rvalue);
1180         if (r < 0) {
1181                 log_syntax(unit, LOG_ERR, filename, line, r,
1182                            "Failed to parse permille value, ignoring: %s", rvalue);
1183                 return 0;
1184         }
1185
1186         *permille = (unsigned) r;
1187
1188         return 0;
1189 }
1190
1191 int config_parse_vlanprotocol(const char* unit,
1192                               const char *filename,
1193                               unsigned line,
1194                               const char *section,
1195                               unsigned section_line,
1196                               const char *lvalue,
1197                               int ltype,
1198                               const char *rvalue,
1199                               void *data,
1200                               void *userdata) {
1201         int *vlan_protocol = data;
1202         assert(filename);
1203         assert(lvalue);
1204
1205         if (isempty(rvalue)) {
1206                 *vlan_protocol = -1;
1207                 return 0;
1208         }
1209
1210         if (STR_IN_SET(rvalue, "802.1ad", "802.1AD"))
1211                 *vlan_protocol = ETH_P_8021AD;
1212         else if (STR_IN_SET(rvalue, "802.1q", "802.1Q"))
1213                 *vlan_protocol = ETH_P_8021Q;
1214         else {
1215                 log_syntax(unit, LOG_ERR, filename, line, 0,
1216                            "Failed to parse VLAN protocol value, ignoring: %s", rvalue);
1217                 return 0;
1218         }
1219
1220         return 0;
1221 }