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 "parse-util.h"
  22 #include "path-util.h"
  23 #include "process-util.h"
  24 //#include "rlimit-util.h"
  25 #include "signal-util.h"
  26 #include "socket-util.h"
  27 #include "string-util.h"
  28 #include "strv.h"
  29 #include "syslog-util.h"
  30 #include "time-util.h"
  31 #include "utf8.h"
  32
  33 /// Additional includes needed by elogind
  34 #include "def.h"
  35 #include "fileio.h"
  36
  37 int config_item_table_lookup(
  38                 const void *table,
  39                 const char *section,
  40                 const char *lvalue,
  41                 ConfigParserCallback *func,
  42                 int *ltype,
  43                 void **data,
  44                 void *userdata) {
  45
  46         const ConfigTableItem *t;
  47
  48         assert(table);
  49         assert(lvalue);
  50         assert(func);
  51         assert(ltype);
  52         assert(data);
  53
  54         for (t = table; t->lvalue; t++) {
  55
  56                 if (!streq(lvalue, t->lvalue))
  57                         continue;
  58
  59                 if (!streq_ptr(section, t->section))
  60                         continue;
  61
  62                 *func = t->parse;
  63                 *ltype = t->ltype;
  64                 *data = t->data;
  65                 return 1;
  66         }
  67
  68         return 0;
  69 }
  70
  71 int config_item_perf_lookup(
  72                 const void *table,
  73                 const char *section,
  74                 const char *lvalue,
  75                 ConfigParserCallback *func,
  76                 int *ltype,
  77                 void **data,
  78                 void *userdata) {
  79
  80         ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
  81         const ConfigPerfItem *p;
  82
  83         assert(table);
  84         assert(lvalue);
  85         assert(func);
  86         assert(ltype);
  87         assert(data);
  88
  89         if (!section)
  90                 p = lookup(lvalue, strlen(lvalue));
  91         else {
  92                 char *key;
  93
  94                 key = strjoin(section, ".", lvalue);
  95                 if (!key)
  96                         return -ENOMEM;
  97
  98                 p = lookup(key, strlen(key));
  99                 free(key);
 100         }
 101
 102         if (!p)
 103                 return 0;
 104
 105         *func = p->parse;
 106         *ltype = p->ltype;
 107         *data = (uint8_t*) userdata + p->offset;
 108         return 1;
 109 }
 110
 111 /* Run the user supplied parser for an assignment */
 112 static int next_assignment(
 113                 const char *unit,
 114                 const char *filename,
 115                 unsigned line,
 116                 ConfigItemLookup lookup,
 117                 const void *table,
 118                 const char *section,
 119                 unsigned section_line,
 120                 const char *lvalue,
 121                 const char *rvalue,
 122                 ConfigParseFlags flags,
 123                 void *userdata) {
 124
 125         ConfigParserCallback func = NULL;
 126         int ltype = 0;
 127         void *data = NULL;
 128         int r;
 129
 130         assert(filename);
 131         assert(line > 0);
 132         assert(lookup);
 133         assert(lvalue);
 134         assert(rvalue);
 135
 136         r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
 137         if (r < 0)
 138                 return r;
 139
 140         if (r > 0) {
 141                 if (func)
 142                         return func(unit, filename, line, section, section_line,
 143                                     lvalue, ltype, rvalue, data, userdata);
 144
 145                 return 0;
 146         }
 147
 148         /* Warn about unknown non-extension fields. */
 149         if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(lvalue, "X-"))
 150                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown lvalue '%s' in section '%s'", lvalue, section);
 151
 152         return 0;
 153 }
 154
 155 /* Parse a single logical line */
 156 static int parse_line(
 157                 const char* unit,
 158                 const char *filename,
 159                 unsigned line,
 160                 const char *sections,
 161                 ConfigItemLookup lookup,
 162                 const void *table,
 163                 ConfigParseFlags flags,
 164                 char **section,
 165                 unsigned *section_line,
 166                 bool *section_ignored,
 167                 char *l,
 168                 void *userdata) {
 169
 170         char *e, *include;
 171
 172         assert(filename);
 173         assert(line > 0);
 174         assert(lookup);
 175         assert(l);
 176
 177         l = strstrip(l);
 178         if (!*l)
 179                 return 0;
 180
 181         if (strchr(COMMENTS "\n", *l))
 182                 return 0;
 183
 184         include = first_word(l, ".include");
 185         if (include) {
 186                 _cleanup_free_ char *fn = NULL;
 187
 188                 /* .includes are a bad idea, we only support them here
 189                  * for historical reasons. They create cyclic include
 190                  * problems and make it difficult to detect
 191                  * configuration file changes with an easy
 192                  * stat(). Better approaches, such as .d/ drop-in
 193                  * snippets exist.
 194                  *
 195                  * Support for them should be eventually removed. */
 196
 197                 if (!(flags & CONFIG_PARSE_ALLOW_INCLUDE)) {
 198                         log_syntax(unit, LOG_ERR, filename, line, 0, ".include not allowed here. Ignoring.");
 199                         return 0;
 200                 }
 201
 202                 log_syntax(unit, LOG_WARNING, filename, line, 0,
 203                            ".include directives are deprecated, and support for them will be removed in a future version of elogind. "
 204                            "Please use drop-in files instead.");
 205
 206                 fn = file_in_same_dir(filename, strstrip(include));
 207                 if (!fn)
 208                         return -ENOMEM;
 209
 210                 return config_parse(unit, fn, NULL, sections, lookup, table, flags, userdata);
 211         }
 212
 213         if (!utf8_is_valid(l))
 214                 return log_syntax_invalid_utf8(unit, LOG_WARNING, filename, line, l);
 215
 216         if (*l == '[') {
 217                 size_t k;
 218                 char *n;
 219
 220                 k = strlen(l);
 221                 assert(k > 0);
 222
 223                 if (l[k-1] != ']') {
 224                         log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid section header '%s'", l);
 225                         return -EBADMSG;
 226                 }
 227
 228                 n = strndup(l+1, k-2);
 229                 if (!n)
 230                         return -ENOMEM;
 231
 232                 if (sections && !nulstr_contains(sections, n)) {
 233
 234                         if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(n, "X-"))
 235                                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown section '%s'. Ignoring.", n);
 236
 237                         free(n);
 238                         *section = mfree(*section);
 239                         *section_line = 0;
 240                         *section_ignored = true;
 241                 } else {
 242                         free_and_replace(*section, n);
 243                         *section_line = line;
 244                         *section_ignored = false;
 245                 }
 246
 247                 return 0;
 248         }
 249
 250         if (sections && !*section) {
 251
 252                 if (!(flags & CONFIG_PARSE_RELAXED) && !*section_ignored)
 253                         log_syntax(unit, LOG_WARNING, filename, line, 0, "Assignment outside of section. Ignoring.");
 254
 255                 return 0;
 256         }
 257
 258         e = strchr(l, '=');
 259         if (!e) {
 260                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Missing '='.");
 261                 return -EINVAL;
 262         }
 263
 264         *e = 0;
 265         e++;
 266
 267         return next_assignment(unit,
 268                                filename,
 269                                line,
 270                                lookup,
 271                                table,
 272                                *section,
 273                                *section_line,
 274                                strstrip(l),
 275                                strstrip(e),
 276                                flags,
 277                                userdata);
 278 }
 279
 280 /* Go through the file and parse each line */
 281 int config_parse(const char *unit,
 282                  const char *filename,
 283                  FILE *f,
 284                  const char *sections,
 285                  ConfigItemLookup lookup,
 286                  const void *table,
 287                  ConfigParseFlags flags,
 288                  void *userdata) {
 289
 290         _cleanup_free_ char *section = NULL, *continuation = NULL;
 291         _cleanup_fclose_ FILE *ours = NULL;
 292         unsigned line = 0, section_line = 0;
 293         bool section_ignored = false;
 294         int r;
 295
 296         assert(filename);
 297         assert(lookup);
 298
 299         if (!f) {
 300                 f = ours = fopen(filename, "re");
 301                 if (!f) {
 302                         /* Only log on request, except for ENOENT,
 303                          * since we return 0 to the caller. */
 304                         if ((flags & CONFIG_PARSE_WARN) || errno == ENOENT)
 305                                 log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_ERR, errno,
 306                                                "Failed to open configuration file '%s': %m", filename);
 307                         return errno == ENOENT ? 0 : -errno;
 308                 }
 309         }
 310
 311         fd_warn_permissions(filename, fileno(f));
 312
 313         for (;;) {
 314                 _cleanup_free_ char *buf = NULL;
 315                 bool escaped = false;
 316                 char *l, *p, *e;
 317
 318                 r = read_line(f, LONG_LINE_MAX, &buf);
 319                 if (r == 0)
 320                         break;
 321                 if (r == -ENOBUFS) {
 322                         if (flags & CONFIG_PARSE_WARN)
 323                                 log_error_errno(r, "%s:%u: Line too long", filename, line);
 324
 325                         return r;
 326                 }
 327                 if (r < 0) {
 328                         if (CONFIG_PARSE_WARN)
 329                                 log_error_errno(r, "%s:%u: Error while reading configuration file: %m", filename, line);
 330
 331                         return r;
 332                 }
 333
 334                 l = buf;
 335                 if (!(flags & CONFIG_PARSE_REFUSE_BOM)) {
 336                         char *q;
 337
 338                         q = startswith(buf, UTF8_BYTE_ORDER_MARK);
 339                         if (q) {
 340                                 l = q;
 341                                 flags |= CONFIG_PARSE_REFUSE_BOM;
 342                         }
 343                 }
 344
 345                 if (continuation) {
 346                         if (strlen(continuation) + strlen(l) > LONG_LINE_MAX) {
 347                                 if (flags & CONFIG_PARSE_WARN)
 348                                         log_error("%s:%u: Continuation line too long", filename, line);
 349                                 return -ENOBUFS;
 350                         }
 351
 352                         if (!strextend(&continuation, l, NULL)) {
 353                                 if (flags & CONFIG_PARSE_WARN)
 354                                         log_oom();
 355                                 return -ENOMEM;
 356                         }
 357
 358                         p = continuation;
 359                 } else
 360                         p = l;
 361
 362                 for (e = p; *e; e++) {
 363                         if (escaped)
 364                                 escaped = false;
 365                         else if (*e == '\\')
 366                                 escaped = true;
 367                 }
 368
 369                 if (escaped) {
 370                         *(e-1) = ' ';
 371
 372                         if (!continuation) {
 373                                 continuation = strdup(l);
 374                                 if (!continuation) {
 375                                         if (flags & CONFIG_PARSE_WARN)
 376                                                 log_oom();
 377                                         return -ENOMEM;
 378                                 }
 379                         }
 380
 381                         continue;
 382                 }
 383
 384                 r = parse_line(unit,
 385                                filename,
 386                                ++line,
 387                                sections,
 388                                lookup,
 389                                table,
 390                                flags,
 391                                &section,
 392                                &section_line,
 393                                &section_ignored,
 394                                p,
 395                                userdata);
 396                 if (r < 0) {
 397                         if (flags & CONFIG_PARSE_WARN)
 398                                 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
 399                         return r;
 400                 }
 401
 402                 continuation = mfree(continuation);
 403         }
 404
 405         if (continuation) {
 406                 r = parse_line(unit,
 407                                filename,
 408                                ++line,
 409                                sections,
 410                                lookup,
 411                                table,
 412                                flags,
 413                                &section,
 414                                &section_line,
 415                                &section_ignored,
 416                                continuation,
 417                                userdata);
 418                 if (r < 0) {
 419                         if (flags & CONFIG_PARSE_WARN)
 420                                 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
 421                         return r;
 422                 }
 423         }
 424
 425         return 0;
 426 }
 427
 428 static int config_parse_many_files(
 429                 const char *conf_file,
 430                 char **files,
 431                 const char *sections,
 432                 ConfigItemLookup lookup,
 433                 const void *table,
 434                 ConfigParseFlags flags,
 435                 void *userdata) {
 436
 437         char **fn;
 438         int r;
 439
 440         if (conf_file) {
 441                 r = config_parse(NULL, conf_file, NULL, sections, lookup, table, flags, userdata);
 442                 if (r < 0)
 443                         return r;
 444         }
 445
 446         STRV_FOREACH(fn, files) {
 447                 r = config_parse(NULL, *fn, NULL, sections, lookup, table, flags, userdata);
 448                 if (r < 0)
 449                         return r;
 450         }
 451
 452         return 0;
 453 }
 454
 455 /* Parse each config file in the directories specified as nulstr. */
 456 int config_parse_many_nulstr(
 457                 const char *conf_file,
 458                 const char *conf_file_dirs,
 459                 const char *sections,
 460                 ConfigItemLookup lookup,
 461                 const void *table,
 462                 ConfigParseFlags flags,
 463                 void *userdata) {
 464
 465         _cleanup_strv_free_ char **files = NULL;
 466         int r;
 467
 468         r = conf_files_list_nulstr(&files, ".conf", NULL, 0, conf_file_dirs);
 469         if (r < 0)
 470                 return r;
 471
 472         return config_parse_many_files(conf_file, files, sections, lookup, table, flags, userdata);
 473 }
 474
 475 #if 0 /// UNNEEDED by elogind
 476 /* Parse each config file in the directories specified as strv. */
 477 int config_parse_many(
 478                 const char *conf_file,
 479                 const char* const* conf_file_dirs,
 480                 const char *dropin_dirname,
 481                 const char *sections,
 482                 ConfigItemLookup lookup,
 483                 const void *table,
 484                 ConfigParseFlags flags,
 485                 void *userdata) {
 486
 487         _cleanup_strv_free_ char **dropin_dirs = NULL;
 488         _cleanup_strv_free_ char **files = NULL;
 489         const char *suffix;
 490         int r;
 491
 492         suffix = strjoina("/", dropin_dirname);
 493         r = strv_extend_strv_concat(&dropin_dirs, (char**) conf_file_dirs, suffix);
 494         if (r < 0)
 495                 return r;
 496
 497         r = conf_files_list_strv(&files, ".conf", NULL, 0, (const char* const*) dropin_dirs);
 498         if (r < 0)
 499                 return r;
 500
 501         return config_parse_many_files(conf_file, files, sections, lookup, table, flags, userdata);
 502 }
 503 #endif // 0
 504
 505 #define DEFINE_PARSER(type, vartype, conv_func)                         \
 506         DEFINE_CONFIG_PARSE_PTR(config_parse_##type, conv_func, vartype, "Failed to parse " #type " value")
 507
 508 DEFINE_PARSER(int, int, safe_atoi);
 509 DEFINE_PARSER(long, long, safe_atoli);
 510 #if 0 /// UNNEEDED by elogind
 511 DEFINE_PARSER(uint8, uint8_t, safe_atou8);
 512 DEFINE_PARSER(uint16, uint16_t, safe_atou16);
 513 DEFINE_PARSER(uint32, uint32_t, safe_atou32);
 514 #endif // 0
 515 DEFINE_PARSER(uint64, uint64_t, safe_atou64);
 516 DEFINE_PARSER(unsigned, unsigned, safe_atou);
 517 DEFINE_PARSER(double, double, safe_atod);
 518 #if 0 /// UNNEEDED by elogind
 519 DEFINE_PARSER(nsec, nsec_t, parse_nsec);
 520 #endif // 0
 521 DEFINE_PARSER(sec, usec_t, parse_sec);
 522 #if 0 /// UNNEEDED by elogind
 523 DEFINE_PARSER(mode, mode_t, parse_mode);
 524
 525 int config_parse_iec_size(const char* unit,
 526                             const char *filename,
 527                             unsigned line,
 528                             const char *section,
 529                             unsigned section_line,
 530                             const char *lvalue,
 531                             int ltype,
 532                             const char *rvalue,
 533                             void *data,
 534                             void *userdata) {
 535
 536         size_t *sz = data;
 537         uint64_t v;
 538         int r;
 539
 540         assert(filename);
 541         assert(lvalue);
 542         assert(rvalue);
 543         assert(data);
 544
 545         r = parse_size(rvalue, 1024, &v);
 546         if (r < 0 || (uint64_t) (size_t) v != v) {
 547                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 548                 return 0;
 549         }
 550
 551         *sz = (size_t) v;
 552         return 0;
 553 }
 554
 555 int config_parse_si_size(
 556                 const char* unit,
 557                 const char *filename,
 558                 unsigned line,
 559                 const char *section,
 560                 unsigned section_line,
 561                 const char *lvalue,
 562                 int ltype,
 563                 const char *rvalue,
 564                 void *data,
 565                 void *userdata) {
 566
 567         size_t *sz = data;
 568         uint64_t v;
 569         int r;
 570
 571         assert(filename);
 572         assert(lvalue);
 573         assert(rvalue);
 574         assert(data);
 575
 576         r = parse_size(rvalue, 1000, &v);
 577         if (r < 0 || (uint64_t) (size_t) v != v) {
 578                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 579                 return 0;
 580         }
 581
 582         *sz = (size_t) v;
 583         return 0;
 584 }
 585
 586 int config_parse_iec_uint64(
 587                 const char* unit,
 588                 const char *filename,
 589                 unsigned line,
 590                 const char *section,
 591                 unsigned section_line,
 592                 const char *lvalue,
 593                 int ltype,
 594                 const char *rvalue,
 595                 void *data,
 596                 void *userdata) {
 597
 598         uint64_t *bytes = data;
 599         int r;
 600
 601         assert(filename);
 602         assert(lvalue);
 603         assert(rvalue);
 604         assert(data);
 605
 606         r = parse_size(rvalue, 1024, bytes);
 607         if (r < 0)
 608                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 609
 610         return 0;
 611 }
 612 #endif // 0
 613
 614 int config_parse_bool(const char* unit,
 615                       const char *filename,
 616                       unsigned line,
 617                       const char *section,
 618                       unsigned section_line,
 619                       const char *lvalue,
 620                       int ltype,
 621                       const char *rvalue,
 622                       void *data,
 623                       void *userdata) {
 624
 625         int k;
 626         bool *b = data;
 627         bool fatal = ltype;
 628
 629         assert(filename);
 630         assert(lvalue);
 631         assert(rvalue);
 632         assert(data);
 633
 634         k = parse_boolean(rvalue);
 635         if (k < 0) {
 636                 log_syntax(unit, LOG_ERR, filename, line, k,
 637                            "Failed to parse boolean value%s: %s",
 638                            fatal ? "" : ", ignoring", rvalue);
 639                 return fatal ? -ENOEXEC : 0;
 640         }
 641
 642         *b = k;
 643         return 0;
 644 }
 645
 646 #if 0 /// UNNEEDED by elogind
 647 int config_parse_tristate(
 648                 const char* unit,
 649                 const char *filename,
 650                 unsigned line,
 651                 const char *section,
 652                 unsigned section_line,
 653                 const char *lvalue,
 654                 int ltype,
 655                 const char *rvalue,
 656                 void *data,
 657                 void *userdata) {
 658
 659         int k, *t = data;
 660
 661         assert(filename);
 662         assert(lvalue);
 663         assert(rvalue);
 664         assert(data);
 665
 666         /* A tristate is pretty much a boolean, except that it can
 667          * also take the special value -1, indicating "uninitialized",
 668          * much like NULL is for a pointer type. */
 669
 670         k = parse_boolean(rvalue);
 671         if (k < 0) {
 672                 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
 673                 return 0;
 674         }
 675
 676         *t = !!k;
 677         return 0;
 678 }
 679 #endif // 0
 680
 681 int config_parse_string(
 682                 const char *unit,
 683                 const char *filename,
 684                 unsigned line,
 685                 const char *section,
 686                 unsigned section_line,
 687                 const char *lvalue,
 688                 int ltype,
 689                 const char *rvalue,
 690                 void *data,
 691                 void *userdata) {
 692
 693         char **s = data;
 694
 695         assert(filename);
 696         assert(lvalue);
 697         assert(rvalue);
 698         assert(data);
 699
 700         if (free_and_strdup(s, empty_to_null(rvalue)) < 0)
 701                 return log_oom();
 702
 703         return 0;
 704 }
 705
 706 #if 0 /// UNNEEDED by elogind
 707 int config_parse_path(
 708                 const char *unit,
 709                 const char *filename,
 710                 unsigned line,
 711                 const char *section,
 712                 unsigned section_line,
 713                 const char *lvalue,
 714                 int ltype,
 715                 const char *rvalue,
 716                 void *data,
 717                 void *userdata) {
 718
 719         _cleanup_free_ char *n = NULL;
 720         bool fatal = ltype;
 721         char **s = data;
 722         int r;
 723
 724         assert(filename);
 725         assert(lvalue);
 726         assert(rvalue);
 727         assert(data);
 728
 729         if (isempty(rvalue))
 730                 goto finalize;
 731
 732         n = strdup(rvalue);
 733         if (!n)
 734                 return log_oom();
 735
 736         r = path_simplify_and_warn(n, PATH_CHECK_ABSOLUTE | (fatal ? PATH_CHECK_FATAL : 0), unit, filename, line, lvalue);
 737         if (r < 0)
 738                 return fatal ? -ENOEXEC : 0;
 739
 740 finalize:
 741         return free_and_replace(*s, n);
 742 }
 743 #endif // 0
 744
 745 int config_parse_strv(
 746                 const char *unit,
 747                 const char *filename,
 748                 unsigned line,
 749                 const char *section,
 750                 unsigned section_line,
 751                 const char *lvalue,
 752                 int ltype,
 753                 const char *rvalue,
 754                 void *data,
 755                 void *userdata) {
 756
 757         char ***sv = data;
 758         int r;
 759
 760         assert(filename);
 761         assert(lvalue);
 762         assert(rvalue);
 763         assert(data);
 764
 765         if (isempty(rvalue)) {
 766                 *sv = strv_free(*sv);
 767                 return 0;
 768         }
 769
 770         for (;;) {
 771                 char *word = NULL;
 772
 773                 r = extract_first_word(&rvalue, &word, NULL, EXTRACT_QUOTES|EXTRACT_RETAIN_ESCAPE);
 774                 if (r == 0)
 775                         break;
 776                 if (r == -ENOMEM)
 777                         return log_oom();
 778                 if (r < 0) {
 779                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
 780                         break;
 781                 }
 782
 783                 r = strv_consume(sv, word);
 784                 if (r < 0)
 785                         return log_oom();
 786         }
 787
 788         return 0;
 789 }
 790
 791 #if 0 /// UNNEEDED by elogind
 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_ip_port(
 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         uint16_t *s = data;
1002         uint16_t port;
1003         int r;
1004
1005         assert(filename);
1006         assert(lvalue);
1007         assert(rvalue);
1008         assert(data);
1009
1010         if (isempty(rvalue)) {
1011                 *s = 0;
1012                 return 0;
1013         }
1014
1015         r = parse_ip_port(rvalue, &port);
1016         if (r < 0) {
1017                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse port '%s'.", rvalue);
1018                 return 0;
1019         }
1020
1021         *s = port;
1022
1023         return 0;
1024 }
1025
1026 int config_parse_join_controllers(
1027                 const char *unit,
1028                 const char *filename,
1029                 unsigned line,
1030                 const char *section,
1031                 unsigned section_line,
1032                 const char *lvalue,
1033                 int ltype,
1034                 const char *rvalue,
1035                 void *data,
1036                 void *userdata) {
1037
1038         char ****ret = data;
1039         const char *whole_rvalue = rvalue;
1040         unsigned n = 0;
1041         _cleanup_(strv_free_freep) char ***controllers = NULL;
1042
1043         assert(filename);
1044         assert(lvalue);
1045         assert(rvalue);
1046         assert(ret);
1047
1048         for (;;) {
1049                 _cleanup_free_ char *word = NULL;
1050                 char **l;
1051                 int r;
1052
1053                 r = extract_first_word(&rvalue, &word, NULL, EXTRACT_QUOTES);
1054                 if (r < 0) {
1055                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid value for %s: %s", lvalue, whole_rvalue);
1056                         return r;
1057                 }
1058                 if (r == 0)
1059                         break;
1060
1061                 l = strv_split(word, ",");
1062                 if (!l)
1063                         return log_oom();
1064                 strv_uniq(l);
1065
1066                 if (strv_length(l) <= 1) {
1067                         strv_free(l);
1068                         continue;
1069                 }
1070
1071                 if (!controllers) {
1072                         controllers = new(char**, 2);
1073                         if (!controllers) {
1074                                 strv_free(l);
1075                                 return log_oom();
1076                         }
1077
1078                         controllers[0] = l;
1079                         controllers[1] = NULL;
1080
1081                         n = 1;
1082                 } else {
1083                         char ***a;
1084                         char ***t;
1085
1086                         t = new0(char**, n+2);
1087                         if (!t) {
1088                                 strv_free(l);
1089                                 return log_oom();
1090                         }
1091
1092                         n = 0;
1093
1094                         for (a = controllers; *a; a++)
1095                                 if (strv_overlap(*a, l)) {
1096                                         if (strv_extend_strv(&l, *a, false) < 0) {
1097                                                 strv_free(l);
1098                                                 strv_free_free(t);
1099                                                 return log_oom();
1100                                         }
1101
1102                                 } else {
1103                                         char **c;
1104
1105                                         c = strv_copy(*a);
1106                                         if (!c) {
1107                                                 strv_free(l);
1108                                                 strv_free_free(t);
1109                                                 return log_oom();
1110                                         }
1111
1112                                         t[n++] = c;
1113                                 }
1114
1115                         t[n++] = strv_uniq(l);
1116
1117                         strv_free_free(controllers);
1118                         controllers = t;
1119                 }
1120         }
1121         if (!isempty(rvalue))
1122                 log_syntax(unit, LOG_ERR, filename, line, 0, "Trailing garbage, ignoring.");
1123
1124         /* As a special case, return a single empty strv, to override the default */
1125         if (!controllers) {
1126                 controllers = new(char**, 2);
1127                 if (!controllers)
1128                         return log_oom();
1129                 controllers[0] = strv_new(NULL, NULL);
1130                 if (!controllers[0])
1131                         return log_oom();
1132                 controllers[1] = NULL;
1133         }
1134
1135         strv_free_free(*ret);
1136         *ret = TAKE_PTR(controllers);
1137
1138         return 0;
1139 }
1140
1141 int config_parse_mtu(
1142                 const char *unit,
1143                 const char *filename,
1144                 unsigned line,
1145                 const char *section,
1146                 unsigned section_line,
1147                 const char *lvalue,
1148                 int ltype,
1149                 const char *rvalue,
1150                 void *data,
1151                 void *userdata) {
1152
1153         uint32_t *mtu = data;
1154         int r;
1155
1156         assert(rvalue);
1157         assert(mtu);
1158
1159         r = parse_mtu(ltype, rvalue, mtu);
1160         if (r == -ERANGE) {
1161                 log_syntax(unit, LOG_ERR, filename, line, r,
1162                            "Maximum transfer unit (MTU) value out of range. Permitted range is %" PRIu32 "…%" PRIu32 ", ignoring: %s",
1163                            (uint32_t) (ltype == AF_INET6 ? IPV6_MIN_MTU : IPV4_MIN_MTU), (uint32_t) UINT32_MAX,
1164                            rvalue);
1165                 return 0;
1166         }
1167         if (r < 0) {
1168                 log_syntax(unit, LOG_ERR, filename, line, r,
1169                            "Failed to parse MTU value '%s', ignoring: %m", rvalue);
1170                 return 0;
1171         }
1172
1173         return 0;
1174 }
1175
1176 int config_parse_rlimit(
1177                 const char *unit,
1178                 const char *filename,
1179                 unsigned line,
1180                 const char *section,
1181                 unsigned section_line,
1182                 const char *lvalue,
1183                 int ltype,
1184                 const char *rvalue,
1185                 void *data,
1186                 void *userdata) {
1187
1188         struct rlimit **rl = data, d = {};
1189         int r;
1190
1191         assert(rvalue);
1192         assert(rl);
1193
1194         r = rlimit_parse(ltype, rvalue, &d);
1195         if (r == -EILSEQ) {
1196                 log_syntax(unit, LOG_WARNING, filename, line, r, "Soft resource limit chosen higher than hard limit, ignoring: %s", rvalue);
1197                 return 0;
1198         }
1199         if (r < 0) {
1200                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse resource value, ignoring: %s", rvalue);
1201                 return 0;
1202         }
1203
1204         if (rl[ltype])
1205                 *rl[ltype] = d;
1206         else {
1207                 rl[ltype] = newdup(struct rlimit, &d, 1);
1208                 if (!rl[ltype])
1209                         return log_oom();
1210         }
1211
1212         return 0;
1213 }
1214
1215 int config_parse_permille(const char* unit,
1216                           const char *filename,
1217                           unsigned line,
1218                           const char *section,
1219                           unsigned section_line,
1220                           const char *lvalue,
1221                           int ltype,
1222                           const char *rvalue,
1223                           void *data,
1224                           void *userdata) {
1225
1226         unsigned *permille = data;
1227         int r;
1228
1229         assert(filename);
1230         assert(lvalue);
1231         assert(rvalue);
1232         assert(permille);
1233
1234         r = parse_permille(rvalue);
1235         if (r < 0) {
1236                 log_syntax(unit, LOG_ERR, filename, line, r,
1237                            "Failed to parse permille value, ignoring: %s", rvalue);
1238                 return 0;
1239         }
1240
1241         *permille = (unsigned) r;
1242
1243         return 0;
1244 }
1245 #endif // 0