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 "signal-util.h"
  25 #include "socket-util.h"
  26 #include "string-util.h"
  27 #include "strv.h"
  28 #include "syslog-util.h"
  29 #include "time-util.h"
  30 #include "utf8.h"
  31 #include "rlimit-util.h"
  32
  33 int config_item_table_lookup(
  34                 const void *table,
  35                 const char *section,
  36                 const char *lvalue,
  37                 ConfigParserCallback *func,
  38                 int *ltype,
  39                 void **data,
  40                 void *userdata) {
  41
  42         const ConfigTableItem *t;
  43
  44         assert(table);
  45         assert(lvalue);
  46         assert(func);
  47         assert(ltype);
  48         assert(data);
  49
  50         for (t = table; t->lvalue; t++) {
  51
  52                 if (!streq(lvalue, t->lvalue))
  53                         continue;
  54
  55                 if (!streq_ptr(section, t->section))
  56                         continue;
  57
  58                 *func = t->parse;
  59                 *ltype = t->ltype;
  60                 *data = t->data;
  61                 return 1;
  62         }
  63
  64         return 0;
  65 }
  66
  67 int config_item_perf_lookup(
  68                 const void *table,
  69                 const char *section,
  70                 const char *lvalue,
  71                 ConfigParserCallback *func,
  72                 int *ltype,
  73                 void **data,
  74                 void *userdata) {
  75
  76         ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
  77         const ConfigPerfItem *p;
  78
  79         assert(table);
  80         assert(lvalue);
  81         assert(func);
  82         assert(ltype);
  83         assert(data);
  84
  85         if (!section)
  86                 p = lookup(lvalue, strlen(lvalue));
  87         else {
  88                 char *key;
  89
  90                 key = strjoin(section, ".", lvalue);
  91                 if (!key)
  92                         return -ENOMEM;
  93
  94                 p = lookup(key, strlen(key));
  95                 free(key);
  96         }
  97
  98         if (!p)
  99                 return 0;
 100
 101         *func = p->parse;
 102         *ltype = p->ltype;
 103         *data = (uint8_t*) userdata + p->offset;
 104         return 1;
 105 }
 106
 107 /* Run the user supplied parser for an assignment */
 108 static int next_assignment(
 109                 const char *unit,
 110                 const char *filename,
 111                 unsigned line,
 112                 ConfigItemLookup lookup,
 113                 const void *table,
 114                 const char *section,
 115                 unsigned section_line,
 116                 const char *lvalue,
 117                 const char *rvalue,
 118                 ConfigParseFlags flags,
 119                 void *userdata) {
 120
 121         ConfigParserCallback func = NULL;
 122         int ltype = 0;
 123         void *data = NULL;
 124         int r;
 125
 126         assert(filename);
 127         assert(line > 0);
 128         assert(lookup);
 129         assert(lvalue);
 130         assert(rvalue);
 131
 132         r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
 133         if (r < 0)
 134                 return r;
 135
 136         if (r > 0) {
 137                 if (func)
 138                         return func(unit, filename, line, section, section_line,
 139                                     lvalue, ltype, rvalue, data, userdata);
 140
 141                 return 0;
 142         }
 143
 144         /* Warn about unknown non-extension fields. */
 145         if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(lvalue, "X-"))
 146                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown lvalue '%s' in section '%s'", lvalue, section);
 147
 148         return 0;
 149 }
 150
 151 /* Parse a single logical line */
 152 static int parse_line(
 153                 const char* unit,
 154                 const char *filename,
 155                 unsigned line,
 156                 const char *sections,
 157                 ConfigItemLookup lookup,
 158                 const void *table,
 159                 ConfigParseFlags flags,
 160                 char **section,
 161                 unsigned *section_line,
 162                 bool *section_ignored,
 163                 char *l,
 164                 void *userdata) {
 165
 166         char *e, *include;
 167
 168         assert(filename);
 169         assert(line > 0);
 170         assert(lookup);
 171         assert(l);
 172
 173         l = strstrip(l);
 174         if (!*l)
 175                 return 0;
 176
 177         if (*l == '\n')
 178                 return 0;
 179
 180         include = first_word(l, ".include");
 181         if (include) {
 182                 _cleanup_free_ char *fn = NULL;
 183
 184                 /* .includes are a bad idea, we only support them here
 185                  * for historical reasons. They create cyclic include
 186                  * problems and make it difficult to detect
 187                  * configuration file changes with an easy
 188                  * stat(). Better approaches, such as .d/ drop-in
 189                  * snippets exist.
 190                  *
 191                  * Support for them should be eventually removed. */
 192
 193                 if (!(flags & CONFIG_PARSE_ALLOW_INCLUDE)) {
 194                         log_syntax(unit, LOG_ERR, filename, line, 0, ".include not allowed here. Ignoring.");
 195                         return 0;
 196                 }
 197
 198                 log_syntax(unit, LOG_WARNING, filename, line, 0,
 199                            ".include directives are deprecated, and support for them will be removed in a future version of systemd. "
 200                            "Please use drop-in files instead.");
 201
 202                 fn = file_in_same_dir(filename, strstrip(include));
 203                 if (!fn)
 204                         return -ENOMEM;
 205
 206                 return config_parse(unit, fn, NULL, sections, lookup, table, flags, userdata);
 207         }
 208
 209         if (!utf8_is_valid(l))
 210                 return log_syntax_invalid_utf8(unit, LOG_WARNING, filename, line, l);
 211
 212         if (*l == '[') {
 213                 size_t k;
 214                 char *n;
 215
 216                 k = strlen(l);
 217                 assert(k > 0);
 218
 219                 if (l[k-1] != ']') {
 220                         log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid section header '%s'", l);
 221                         return -EBADMSG;
 222                 }
 223
 224                 n = strndup(l+1, k-2);
 225                 if (!n)
 226                         return -ENOMEM;
 227
 228                 if (sections && !nulstr_contains(sections, n)) {
 229
 230                         if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(n, "X-"))
 231                                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown section '%s'. Ignoring.", n);
 232
 233                         free(n);
 234                         *section = mfree(*section);
 235                         *section_line = 0;
 236                         *section_ignored = true;
 237                 } else {
 238                         free_and_replace(*section, n);
 239                         *section_line = line;
 240                         *section_ignored = false;
 241                 }
 242
 243                 return 0;
 244         }
 245
 246         if (sections && !*section) {
 247
 248                 if (!(flags & CONFIG_PARSE_RELAXED) && !*section_ignored)
 249                         log_syntax(unit, LOG_WARNING, filename, line, 0, "Assignment outside of section. Ignoring.");
 250
 251                 return 0;
 252         }
 253
 254         e = strchr(l, '=');
 255         if (!e) {
 256                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Missing '='.");
 257                 return -EINVAL;
 258         }
 259
 260         *e = 0;
 261         e++;
 262
 263         return next_assignment(unit,
 264                                filename,
 265                                line,
 266                                lookup,
 267                                table,
 268                                *section,
 269                                *section_line,
 270                                strstrip(l),
 271                                strstrip(e),
 272                                flags,
 273                                userdata);
 274 }
 275
 276 /* Go through the file and parse each line */
 277 int config_parse(const char *unit,
 278                  const char *filename,
 279                  FILE *f,
 280                  const char *sections,
 281                  ConfigItemLookup lookup,
 282                  const void *table,
 283                  ConfigParseFlags flags,
 284                  void *userdata) {
 285
 286         _cleanup_free_ char *section = NULL, *continuation = NULL;
 287         _cleanup_fclose_ FILE *ours = NULL;
 288         unsigned line = 0, section_line = 0;
 289         bool section_ignored = false;
 290         int r;
 291
 292         assert(filename);
 293         assert(lookup);
 294
 295         if (!f) {
 296                 f = ours = fopen(filename, "re");
 297                 if (!f) {
 298                         /* Only log on request, except for ENOENT,
 299                          * since we return 0 to the caller. */
 300                         if ((flags & CONFIG_PARSE_WARN) || errno == ENOENT)
 301                                 log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_ERR, errno,
 302                                                "Failed to open configuration file '%s': %m", filename);
 303                         return errno == ENOENT ? 0 : -errno;
 304                 }
 305         }
 306
 307         fd_warn_permissions(filename, fileno(f));
 308
 309         for (;;) {
 310                 _cleanup_free_ char *buf = NULL;
 311                 bool escaped = false;
 312                 char *l, *p, *e;
 313
 314                 r = read_line(f, LONG_LINE_MAX, &buf);
 315                 if (r == 0)
 316                         break;
 317                 if (r == -ENOBUFS) {
 318                         if (flags & CONFIG_PARSE_WARN)
 319                                 log_error_errno(r, "%s:%u: Line too long", filename, line);
 320
 321                         return r;
 322                 }
 323                 if (r < 0) {
 324                         if (CONFIG_PARSE_WARN)
 325                                 log_error_errno(r, "%s:%u: Error while reading configuration file: %m", filename, line);
 326
 327                         return r;
 328                 }
 329
 330                 if (strchr(COMMENTS, *buf))
 331                         continue;
 332
 333                 l = buf;
 334                 if (!(flags & CONFIG_PARSE_REFUSE_BOM)) {
 335                         char *q;
 336
 337                         q = startswith(buf, UTF8_BYTE_ORDER_MARK);
 338                         if (q) {
 339                                 l = q;
 340                                 flags |= CONFIG_PARSE_REFUSE_BOM;
 341                         }
 342                 }
 343
 344                 if (continuation) {
 345                         if (strlen(continuation) + strlen(l) > LONG_LINE_MAX) {
 346                                 if (flags & CONFIG_PARSE_WARN)
 347                                         log_error("%s:%u: Continuation line too long", filename, line);
 348                                 return -ENOBUFS;
 349                         }
 350
 351                         if (!strextend(&continuation, l, NULL)) {
 352                                 if (flags & CONFIG_PARSE_WARN)
 353                                         log_oom();
 354                                 return -ENOMEM;
 355                         }
 356
 357                         p = continuation;
 358                 } else
 359                         p = l;
 360
 361                 for (e = p; *e; e++) {
 362                         if (escaped)
 363                                 escaped = false;
 364                         else if (*e == '\\')
 365                                 escaped = true;
 366                 }
 367
 368                 if (escaped) {
 369                         *(e-1) = ' ';
 370
 371                         if (!continuation) {
 372                                 continuation = strdup(l);
 373                                 if (!continuation) {
 374                                         if (flags & CONFIG_PARSE_WARN)
 375                                                 log_oom();
 376                                         return -ENOMEM;
 377                                 }
 378                         }
 379
 380                         continue;
 381                 }
 382
 383                 r = parse_line(unit,
 384                                filename,
 385                                ++line,
 386                                sections,
 387                                lookup,
 388                                table,
 389                                flags,
 390                                &section,
 391                                &section_line,
 392                                &section_ignored,
 393                                p,
 394                                userdata);
 395                 if (r < 0) {
 396                         if (flags & CONFIG_PARSE_WARN)
 397                                 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
 398                         return r;
 399                 }
 400
 401                 continuation = mfree(continuation);
 402         }
 403
 404         if (continuation) {
 405                 r = parse_line(unit,
 406                                filename,
 407                                ++line,
 408                                sections,
 409                                lookup,
 410                                table,
 411                                flags,
 412                                &section,
 413                                &section_line,
 414                                &section_ignored,
 415                                continuation,
 416                                userdata);
 417                 if (r < 0) {
 418                         if (flags & CONFIG_PARSE_WARN)
 419                                 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
 420                         return r;
 421                 }
 422         }
 423
 424         return 0;
 425 }
 426
 427 static int config_parse_many_files(
 428                 const char *conf_file,
 429                 char **files,
 430                 const char *sections,
 431                 ConfigItemLookup lookup,
 432                 const void *table,
 433                 ConfigParseFlags flags,
 434                 void *userdata) {
 435
 436         char **fn;
 437         int r;
 438
 439         if (conf_file) {
 440                 r = config_parse(NULL, conf_file, NULL, sections, lookup, table, flags, userdata);
 441                 if (r < 0)
 442                         return r;
 443         }
 444
 445         STRV_FOREACH(fn, files) {
 446                 r = config_parse(NULL, *fn, NULL, sections, lookup, table, flags, userdata);
 447                 if (r < 0)
 448                         return r;
 449         }
 450
 451         return 0;
 452 }
 453
 454 /* Parse each config file in the directories specified as nulstr. */
 455 int config_parse_many_nulstr(
 456                 const char *conf_file,
 457                 const char *conf_file_dirs,
 458                 const char *sections,
 459                 ConfigItemLookup lookup,
 460                 const void *table,
 461                 ConfigParseFlags flags,
 462                 void *userdata) {
 463
 464         _cleanup_strv_free_ char **files = NULL;
 465         int r;
 466
 467         r = conf_files_list_nulstr(&files, ".conf", NULL, 0, conf_file_dirs);
 468         if (r < 0)
 469                 return r;
 470
 471         return config_parse_many_files(conf_file, files, sections, lookup, table, flags, userdata);
 472 }
 473
 474 /* Parse each config file in the directories specified as strv. */
 475 int config_parse_many(
 476                 const char *conf_file,
 477                 const char* const* conf_file_dirs,
 478                 const char *dropin_dirname,
 479                 const char *sections,
 480                 ConfigItemLookup lookup,
 481                 const void *table,
 482                 ConfigParseFlags flags,
 483                 void *userdata) {
 484
 485         _cleanup_strv_free_ char **dropin_dirs = NULL;
 486         _cleanup_strv_free_ char **files = NULL;
 487         const char *suffix;
 488         int r;
 489
 490         suffix = strjoina("/", dropin_dirname);
 491         r = strv_extend_strv_concat(&dropin_dirs, (char**) conf_file_dirs, suffix);
 492         if (r < 0)
 493                 return r;
 494
 495         r = conf_files_list_strv(&files, ".conf", NULL, 0, (const char* const*) dropin_dirs);
 496         if (r < 0)
 497                 return r;
 498
 499         return config_parse_many_files(conf_file, files, sections, lookup, table, flags, userdata);
 500 }
 501
 502 #define DEFINE_PARSER(type, vartype, conv_func)                         \
 503         DEFINE_CONFIG_PARSE_PTR(config_parse_##type, conv_func, vartype, "Failed to parse " #type " value")
 504
 505 DEFINE_PARSER(int, int, safe_atoi);
 506 DEFINE_PARSER(long, long, safe_atoli);
 507 DEFINE_PARSER(uint8, uint8_t, safe_atou8);
 508 DEFINE_PARSER(uint16, uint16_t, safe_atou16);
 509 DEFINE_PARSER(uint32, uint32_t, safe_atou32);
 510 DEFINE_PARSER(uint64, uint64_t, safe_atou64);
 511 DEFINE_PARSER(unsigned, unsigned, safe_atou);
 512 DEFINE_PARSER(double, double, safe_atod);
 513 DEFINE_PARSER(nsec, nsec_t, parse_nsec);
 514 DEFINE_PARSER(sec, usec_t, parse_sec);
 515 DEFINE_PARSER(mode, mode_t, parse_mode);
 516
 517 int config_parse_iec_size(const char* unit,
 518                             const char *filename,
 519                             unsigned line,
 520                             const char *section,
 521                             unsigned section_line,
 522                             const char *lvalue,
 523                             int ltype,
 524                             const char *rvalue,
 525                             void *data,
 526                             void *userdata) {
 527
 528         size_t *sz = data;
 529         uint64_t v;
 530         int r;
 531
 532         assert(filename);
 533         assert(lvalue);
 534         assert(rvalue);
 535         assert(data);
 536
 537         r = parse_size(rvalue, 1024, &v);
 538         if (r >= 0 && (uint64_t) (size_t) v != v)
 539                 r = -ERANGE;
 540         if (r < 0) {
 541                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value '%s', ignoring: %m", rvalue);
 542                 return 0;
 543         }
 544
 545         *sz = (size_t) v;
 546         return 0;
 547 }
 548
 549 int config_parse_si_size(
 550                 const char* unit,
 551                 const char *filename,
 552                 unsigned line,
 553                 const char *section,
 554                 unsigned section_line,
 555                 const char *lvalue,
 556                 int ltype,
 557                 const char *rvalue,
 558                 void *data,
 559                 void *userdata) {
 560
 561         size_t *sz = data;
 562         uint64_t v;
 563         int r;
 564
 565         assert(filename);
 566         assert(lvalue);
 567         assert(rvalue);
 568         assert(data);
 569
 570         r = parse_size(rvalue, 1000, &v);
 571         if (r >= 0 && (uint64_t) (size_t) v != v)
 572                 r = -ERANGE;
 573         if (r < 0) {
 574                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value '%s', ignoring: %m", rvalue);
 575                 return 0;
 576         }
 577
 578         *sz = (size_t) v;
 579         return 0;
 580 }
 581
 582 int config_parse_iec_uint64(
 583                 const char* unit,
 584                 const char *filename,
 585                 unsigned line,
 586                 const char *section,
 587                 unsigned section_line,
 588                 const char *lvalue,
 589                 int ltype,
 590                 const char *rvalue,
 591                 void *data,
 592                 void *userdata) {
 593
 594         uint64_t *bytes = data;
 595         int r;
 596
 597         assert(filename);
 598         assert(lvalue);
 599         assert(rvalue);
 600         assert(data);
 601
 602         r = parse_size(rvalue, 1024, bytes);
 603         if (r < 0)
 604                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 605
 606         return 0;
 607 }
 608
 609 int config_parse_bool(const char* unit,
 610                       const char *filename,
 611                       unsigned line,
 612                       const char *section,
 613                       unsigned section_line,
 614                       const char *lvalue,
 615                       int ltype,
 616                       const char *rvalue,
 617                       void *data,
 618                       void *userdata) {
 619
 620         int k;
 621         bool *b = data;
 622         bool fatal = ltype;
 623
 624         assert(filename);
 625         assert(lvalue);
 626         assert(rvalue);
 627         assert(data);
 628
 629         k = parse_boolean(rvalue);
 630         if (k < 0) {
 631                 log_syntax(unit, LOG_ERR, filename, line, k,
 632                            "Failed to parse boolean value%s: %s",
 633                            fatal ? "" : ", ignoring", rvalue);
 634                 return fatal ? -ENOEXEC : 0;
 635         }
 636
 637         *b = k;
 638         return 0;
 639 }
 640
 641 int config_parse_tristate(
 642                 const char* unit,
 643                 const char *filename,
 644                 unsigned line,
 645                 const char *section,
 646                 unsigned section_line,
 647                 const char *lvalue,
 648                 int ltype,
 649                 const char *rvalue,
 650                 void *data,
 651                 void *userdata) {
 652
 653         int k, *t = data;
 654
 655         assert(filename);
 656         assert(lvalue);
 657         assert(rvalue);
 658         assert(data);
 659
 660         /* A tristate is pretty much a boolean, except that it can
 661          * also take the special value -1, indicating "uninitialized",
 662          * much like NULL is for a pointer type. */
 663
 664         k = parse_boolean(rvalue);
 665         if (k < 0) {
 666                 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
 667                 return 0;
 668         }
 669
 670         *t = !!k;
 671         return 0;
 672 }
 673
 674 int config_parse_string(
 675                 const char *unit,
 676                 const char *filename,
 677                 unsigned line,
 678                 const char *section,
 679                 unsigned section_line,
 680                 const char *lvalue,
 681                 int ltype,
 682                 const char *rvalue,
 683                 void *data,
 684                 void *userdata) {
 685
 686         char **s = data;
 687
 688         assert(filename);
 689         assert(lvalue);
 690         assert(rvalue);
 691         assert(data);
 692
 693         if (free_and_strdup(s, empty_to_null(rvalue)) < 0)
 694                 return log_oom();
 695
 696         return 0;
 697 }
 698
 699 int config_parse_path(
 700                 const char *unit,
 701                 const char *filename,
 702                 unsigned line,
 703                 const char *section,
 704                 unsigned section_line,
 705                 const char *lvalue,
 706                 int ltype,
 707                 const char *rvalue,
 708                 void *data,
 709                 void *userdata) {
 710
 711         _cleanup_free_ char *n = NULL;
 712         bool fatal = ltype;
 713         char **s = data;
 714         int r;
 715
 716         assert(filename);
 717         assert(lvalue);
 718         assert(rvalue);
 719         assert(data);
 720
 721         if (isempty(rvalue))
 722                 goto finalize;
 723
 724         n = strdup(rvalue);
 725         if (!n)
 726                 return log_oom();
 727
 728         r = path_simplify_and_warn(n, PATH_CHECK_ABSOLUTE | (fatal ? PATH_CHECK_FATAL : 0), unit, filename, line, lvalue);
 729         if (r < 0)
 730                 return fatal ? -ENOEXEC : 0;
 731
 732 finalize:
 733         return free_and_replace(*s, n);
 734 }
 735
 736 int config_parse_strv(
 737                 const char *unit,
 738                 const char *filename,
 739                 unsigned line,
 740                 const char *section,
 741                 unsigned section_line,
 742                 const char *lvalue,
 743                 int ltype,
 744                 const char *rvalue,
 745                 void *data,
 746                 void *userdata) {
 747
 748         char ***sv = data;
 749         int r;
 750
 751         assert(filename);
 752         assert(lvalue);
 753         assert(rvalue);
 754         assert(data);
 755
 756         if (isempty(rvalue)) {
 757                 *sv = strv_free(*sv);
 758                 return 0;
 759         }
 760
 761         for (;;) {
 762                 char *word = NULL;
 763
 764                 r = extract_first_word(&rvalue, &word, NULL, EXTRACT_QUOTES|EXTRACT_RETAIN_ESCAPE);
 765                 if (r == 0)
 766                         break;
 767                 if (r == -ENOMEM)
 768                         return log_oom();
 769                 if (r < 0) {
 770                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
 771                         break;
 772                 }
 773
 774                 r = strv_consume(sv, word);
 775                 if (r < 0)
 776                         return log_oom();
 777         }
 778
 779         return 0;
 780 }
 781
 782 int config_parse_warn_compat(
 783                 const char *unit,
 784                 const char *filename,
 785                 unsigned line,
 786                 const char *section,
 787                 unsigned section_line,
 788                 const char *lvalue,
 789                 int ltype,
 790                 const char *rvalue,
 791                 void *data,
 792                 void *userdata) {
 793
 794         Disabled reason = ltype;
 795
 796         switch(reason) {
 797
 798         case DISABLED_CONFIGURATION:
 799                 log_syntax(unit, LOG_DEBUG, filename, line, 0,
 800                            "Support for option %s= has been disabled at compile time and it is ignored", lvalue);
 801                 break;
 802
 803         case DISABLED_LEGACY:
 804                 log_syntax(unit, LOG_INFO, filename, line, 0,
 805                            "Support for option %s= has been removed and it is ignored", lvalue);
 806                 break;
 807
 808         case DISABLED_EXPERIMENTAL:
 809                 log_syntax(unit, LOG_INFO, filename, line, 0,
 810                            "Support for option %s= has not yet been enabled and it is ignored", lvalue);
 811                 break;
 812         }
 813
 814         return 0;
 815 }
 816
 817 int config_parse_log_facility(
 818                 const char *unit,
 819                 const char *filename,
 820                 unsigned line,
 821                 const char *section,
 822                 unsigned section_line,
 823                 const char *lvalue,
 824                 int ltype,
 825                 const char *rvalue,
 826                 void *data,
 827                 void *userdata) {
 828
 829         int *o = data, x;
 830
 831         assert(filename);
 832         assert(lvalue);
 833         assert(rvalue);
 834         assert(data);
 835
 836         x = log_facility_unshifted_from_string(rvalue);
 837         if (x < 0) {
 838                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log facility, ignoring: %s", rvalue);
 839                 return 0;
 840         }
 841
 842         *o = (x << 3) | LOG_PRI(*o);
 843
 844         return 0;
 845 }
 846
 847 int config_parse_log_level(
 848                 const char *unit,
 849                 const char *filename,
 850                 unsigned line,
 851                 const char *section,
 852                 unsigned section_line,
 853                 const char *lvalue,
 854                 int ltype,
 855                 const char *rvalue,
 856                 void *data,
 857                 void *userdata) {
 858
 859         int *o = data, x;
 860
 861         assert(filename);
 862         assert(lvalue);
 863         assert(rvalue);
 864         assert(data);
 865
 866         x = log_level_from_string(rvalue);
 867         if (x < 0) {
 868                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log level, ignoring: %s", rvalue);
 869                 return 0;
 870         }
 871
 872         if (*o < 0) /* if it wasn't initialized so far, assume zero facility */
 873                 *o = x;
 874         else
 875                 *o = (*o & LOG_FACMASK) | x;
 876
 877         return 0;
 878 }
 879
 880 int config_parse_signal(
 881                 const char *unit,
 882                 const char *filename,
 883                 unsigned line,
 884                 const char *section,
 885                 unsigned section_line,
 886                 const char *lvalue,
 887                 int ltype,
 888                 const char *rvalue,
 889                 void *data,
 890                 void *userdata) {
 891
 892         int *sig = data, r;
 893
 894         assert(filename);
 895         assert(lvalue);
 896         assert(rvalue);
 897         assert(sig);
 898
 899         r = signal_from_string(rvalue);
 900         if (r <= 0) {
 901                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse signal name, ignoring: %s", rvalue);
 902                 return 0;
 903         }
 904
 905         *sig = r;
 906         return 0;
 907 }
 908
 909 int config_parse_personality(
 910                 const char *unit,
 911                 const char *filename,
 912                 unsigned line,
 913                 const char *section,
 914                 unsigned section_line,
 915                 const char *lvalue,
 916                 int ltype,
 917                 const char *rvalue,
 918                 void *data,
 919                 void *userdata) {
 920
 921         unsigned long *personality = data, p;
 922
 923         assert(filename);
 924         assert(lvalue);
 925         assert(rvalue);
 926         assert(personality);
 927
 928         if (isempty(rvalue))
 929                 p = PERSONALITY_INVALID;
 930         else {
 931                 p = personality_from_string(rvalue);
 932                 if (p == PERSONALITY_INVALID) {
 933                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse personality, ignoring: %s", rvalue);
 934                         return 0;
 935                 }
 936         }
 937
 938         *personality = p;
 939         return 0;
 940 }
 941
 942 int config_parse_ifname(
 943                 const char *unit,
 944                 const char *filename,
 945                 unsigned line,
 946                 const char *section,
 947                 unsigned section_line,
 948                 const char *lvalue,
 949                 int ltype,
 950                 const char *rvalue,
 951                 void *data,
 952                 void *userdata) {
 953
 954         char **s = data;
 955         int r;
 956
 957         assert(filename);
 958         assert(lvalue);
 959         assert(rvalue);
 960         assert(data);
 961
 962         if (isempty(rvalue)) {
 963                 *s = mfree(*s);
 964                 return 0;
 965         }
 966
 967         if (!ifname_valid(rvalue)) {
 968                 log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue);
 969                 return 0;
 970         }
 971
 972         r = free_and_strdup(s, rvalue);
 973         if (r < 0)
 974                 return log_oom();
 975
 976         return 0;
 977 }
 978
 979 int config_parse_ip_port(
 980                 const char *unit,
 981                 const char *filename,
 982                 unsigned line,
 983                 const char *section,
 984                 unsigned section_line,
 985                 const char *lvalue,
 986                 int ltype,
 987                 const char *rvalue,
 988                 void *data,
 989                 void *userdata) {
 990
 991         uint16_t *s = data;
 992         uint16_t port;
 993         int r;
 994
 995         assert(filename);
 996         assert(lvalue);
 997         assert(rvalue);
 998         assert(data);
 999
1000         if (isempty(rvalue)) {
1001                 *s = 0;
1002                 return 0;
1003         }
1004
1005         r = parse_ip_port(rvalue, &port);
1006         if (r < 0) {
1007                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse port '%s'.", rvalue);
1008                 return 0;
1009         }
1010
1011         *s = port;
1012
1013         return 0;
1014 }
1015
1016 int config_parse_join_controllers(
1017                 const char *unit,
1018                 const char *filename,
1019                 unsigned line,
1020                 const char *section,
1021                 unsigned section_line,
1022                 const char *lvalue,
1023                 int ltype,
1024                 const char *rvalue,
1025                 void *data,
1026                 void *userdata) {
1027
1028         char ****ret = data;
1029         const char *whole_rvalue = rvalue;
1030         unsigned n = 0;
1031         _cleanup_(strv_free_freep) char ***controllers = NULL;
1032
1033         assert(filename);
1034         assert(lvalue);
1035         assert(rvalue);
1036         assert(ret);
1037
1038         for (;;) {
1039                 _cleanup_free_ char *word = NULL;
1040                 char **l;
1041                 int r;
1042
1043                 r = extract_first_word(&rvalue, &word, NULL, EXTRACT_QUOTES);
1044                 if (r < 0) {
1045                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid value for %s: %s", lvalue, whole_rvalue);
1046                         return r;
1047                 }
1048                 if (r == 0)
1049                         break;
1050
1051                 l = strv_split(word, ",");
1052                 if (!l)
1053                         return log_oom();
1054                 strv_uniq(l);
1055
1056                 if (strv_length(l) <= 1) {
1057                         strv_free(l);
1058                         continue;
1059                 }
1060
1061                 if (!controllers) {
1062                         controllers = new(char**, 2);
1063                         if (!controllers) {
1064                                 strv_free(l);
1065                                 return log_oom();
1066                         }
1067
1068                         controllers[0] = l;
1069                         controllers[1] = NULL;
1070
1071                         n = 1;
1072                 } else {
1073                         char ***a;
1074                         char ***t;
1075
1076                         t = new0(char**, n+2);
1077                         if (!t) {
1078                                 strv_free(l);
1079                                 return log_oom();
1080                         }
1081
1082                         n = 0;
1083
1084                         for (a = controllers; *a; a++)
1085                                 if (strv_overlap(*a, l)) {
1086                                         if (strv_extend_strv(&l, *a, false) < 0) {
1087                                                 strv_free(l);
1088                                                 strv_free_free(t);
1089                                                 return log_oom();
1090                                         }
1091
1092                                 } else {
1093                                         char **c;
1094
1095                                         c = strv_copy(*a);
1096                                         if (!c) {
1097                                                 strv_free(l);
1098                                                 strv_free_free(t);
1099                                                 return log_oom();
1100                                         }
1101
1102                                         t[n++] = c;
1103                                 }
1104
1105                         t[n++] = strv_uniq(l);
1106
1107                         strv_free_free(controllers);
1108                         controllers = t;
1109                 }
1110         }
1111         if (!isempty(rvalue))
1112                 log_syntax(unit, LOG_ERR, filename, line, 0, "Trailing garbage, ignoring.");
1113
1114         /* As a special case, return a single empty strv, to override the default */
1115         if (!controllers) {
1116                 controllers = new(char**, 2);
1117                 if (!controllers)
1118                         return log_oom();
1119                 controllers[0] = strv_new(NULL);
1120                 if (!controllers[0])
1121                         return log_oom();
1122                 controllers[1] = NULL;
1123         }
1124
1125         strv_free_free(*ret);
1126         *ret = TAKE_PTR(controllers);
1127
1128         return 0;
1129 }
1130
1131 int config_parse_mtu(
1132                 const char *unit,
1133                 const char *filename,
1134                 unsigned line,
1135                 const char *section,
1136                 unsigned section_line,
1137                 const char *lvalue,
1138                 int ltype,
1139                 const char *rvalue,
1140                 void *data,
1141                 void *userdata) {
1142
1143         uint32_t *mtu = data;
1144         int r;
1145
1146         assert(rvalue);
1147         assert(mtu);
1148
1149         r = parse_mtu(ltype, rvalue, mtu);
1150         if (r == -ERANGE) {
1151                 log_syntax(unit, LOG_ERR, filename, line, r,
1152                            "Maximum transfer unit (MTU) value out of range. Permitted range is %" PRIu32 "…%" PRIu32 ", ignoring: %s",
1153                            (uint32_t) (ltype == AF_INET6 ? IPV6_MIN_MTU : IPV4_MIN_MTU), (uint32_t) UINT32_MAX,
1154                            rvalue);
1155                 return 0;
1156         }
1157         if (r < 0) {
1158                 log_syntax(unit, LOG_ERR, filename, line, r,
1159                            "Failed to parse MTU value '%s', ignoring: %m", rvalue);
1160                 return 0;
1161         }
1162
1163         return 0;
1164 }
1165
1166 int config_parse_rlimit(
1167                 const char *unit,
1168                 const char *filename,
1169                 unsigned line,
1170                 const char *section,
1171                 unsigned section_line,
1172                 const char *lvalue,
1173                 int ltype,
1174                 const char *rvalue,
1175                 void *data,
1176                 void *userdata) {
1177
1178         struct rlimit **rl = data, d = {};
1179         int r;
1180
1181         assert(rvalue);
1182         assert(rl);
1183
1184         r = rlimit_parse(ltype, rvalue, &d);
1185         if (r == -EILSEQ) {
1186                 log_syntax(unit, LOG_WARNING, filename, line, r, "Soft resource limit chosen higher than hard limit, ignoring: %s", rvalue);
1187                 return 0;
1188         }
1189         if (r < 0) {
1190                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse resource value, ignoring: %s", rvalue);
1191                 return 0;
1192         }
1193
1194         if (rl[ltype])
1195                 *rl[ltype] = d;
1196         else {
1197                 rl[ltype] = newdup(struct rlimit, &d, 1);
1198                 if (!rl[ltype])
1199                         return log_oom();
1200         }
1201
1202         return 0;
1203 }
1204
1205 int config_parse_permille(const char* unit,
1206                           const char *filename,
1207                           unsigned line,
1208                           const char *section,
1209                           unsigned section_line,
1210                           const char *lvalue,
1211                           int ltype,
1212                           const char *rvalue,
1213                           void *data,
1214                           void *userdata) {
1215
1216         unsigned *permille = data;
1217         int r;
1218
1219         assert(filename);
1220         assert(lvalue);
1221         assert(rvalue);
1222         assert(permille);
1223
1224         r = parse_permille(rvalue);
1225         if (r < 0) {
1226                 log_syntax(unit, LOG_ERR, filename, line, r,
1227                            "Failed to parse permille value, ignoring: %s", rvalue);
1228                 return 0;
1229         }
1230
1231         *permille = (unsigned) r;
1232
1233         return 0;
1234 }