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