src/shared/conf-parser.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   Copyright 2010 Lennart Poettering
   4 ***/
   5
   6 #include <errno.h>
   7 #include <limits.h>
   8 #include <stdint.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <sys/types.h>
  13
  14 #include "alloc-util.h"
  15 #include "conf-files.h"
  16 #include "conf-parser.h"
  17 #include "def.h"
  18 #include "extract-word.h"
  19 #include "fd-util.h"
  20 #include "fileio.h"
  21 #include "fs-util.h"
  22 #include "log.h"
  23 #include "macro.h"
  24 #include "parse-util.h"
  25 #include "path-util.h"
  26 #include "process-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 #include "rlimit-util.h"
  35
  36 int config_item_table_lookup(
  37                 const void *table,
  38                 const char *section,
  39                 const char *lvalue,
  40                 ConfigParserCallback *func,
  41                 int *ltype,
  42                 void **data,
  43                 void *userdata) {
  44
  45         const ConfigTableItem *t;
  46
  47         assert(table);
  48         assert(lvalue);
  49         assert(func);
  50         assert(ltype);
  51         assert(data);
  52
  53         for (t = table; t->lvalue; t++) {
  54
  55                 if (!streq(lvalue, t->lvalue))
  56                         continue;
  57
  58                 if (!streq_ptr(section, t->section))
  59                         continue;
  60
  61                 *func = t->parse;
  62                 *ltype = t->ltype;
  63                 *data = t->data;
  64                 return 1;
  65         }
  66
  67         return 0;
  68 }
  69
  70 int config_item_perf_lookup(
  71                 const void *table,
  72                 const char *section,
  73                 const char *lvalue,
  74                 ConfigParserCallback *func,
  75                 int *ltype,
  76                 void **data,
  77                 void *userdata) {
  78
  79         ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
  80         const ConfigPerfItem *p;
  81
  82         assert(table);
  83         assert(lvalue);
  84         assert(func);
  85         assert(ltype);
  86         assert(data);
  87
  88         if (!section)
  89                 p = lookup(lvalue, strlen(lvalue));
  90         else {
  91                 char *key;
  92
  93                 key = strjoin(section, ".", lvalue);
  94                 if (!key)
  95                         return -ENOMEM;
  96
  97                 p = lookup(key, strlen(key));
  98                 free(key);
  99         }
 100
 101         if (!p)
 102                 return 0;
 103
 104         *func = p->parse;
 105         *ltype = p->ltype;
 106         *data = (uint8_t*) userdata + p->offset;
 107         return 1;
 108 }
 109
 110 /* Run the user supplied parser for an assignment */
 111 static int next_assignment(
 112                 const char *unit,
 113                 const char *filename,
 114                 unsigned line,
 115                 ConfigItemLookup lookup,
 116                 const void *table,
 117                 const char *section,
 118                 unsigned section_line,
 119                 const char *lvalue,
 120                 const char *rvalue,
 121                 ConfigParseFlags flags,
 122                 void *userdata) {
 123
 124         ConfigParserCallback func = NULL;
 125         int ltype = 0;
 126         void *data = NULL;
 127         int r;
 128
 129         assert(filename);
 130         assert(line > 0);
 131         assert(lookup);
 132         assert(lvalue);
 133         assert(rvalue);
 134
 135         r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
 136         if (r < 0)
 137                 return r;
 138
 139         if (r > 0) {
 140                 if (func)
 141                         return func(unit, filename, line, section, section_line,
 142                                     lvalue, ltype, rvalue, data, userdata);
 143
 144                 return 0;
 145         }
 146
 147         /* Warn about unknown non-extension fields. */
 148         if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(lvalue, "X-"))
 149                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown lvalue '%s' in section '%s'", lvalue, section);
 150
 151         return 0;
 152 }
 153
 154 /* Parse a single logical line */
 155 static int parse_line(
 156                 const char* unit,
 157                 const char *filename,
 158                 unsigned line,
 159                 const char *sections,
 160                 ConfigItemLookup lookup,
 161                 const void *table,
 162                 ConfigParseFlags flags,
 163                 char **section,
 164                 unsigned *section_line,
 165                 bool *section_ignored,
 166                 char *l,
 167                 void *userdata) {
 168
 169         char *e, *include;
 170
 171         assert(filename);
 172         assert(line > 0);
 173         assert(lookup);
 174         assert(l);
 175
 176         l = strstrip(l);
 177         if (!*l)
 178                 return 0;
 179
 180         if (strchr(COMMENTS "\n", *l))
 181                 return 0;
 182
 183         include = first_word(l, ".include");
 184         if (include) {
 185                 _cleanup_free_ char *fn = NULL;
 186
 187                 /* .includes are a bad idea, we only support them here
 188                  * for historical reasons. They create cyclic include
 189                  * problems and make it difficult to detect
 190                  * configuration file changes with an easy
 191                  * stat(). Better approaches, such as .d/ drop-in
 192                  * snippets exist.
 193                  *
 194                  * Support for them should be eventually removed. */
 195
 196                 if (!(flags & CONFIG_PARSE_ALLOW_INCLUDE)) {
 197                         log_syntax(unit, LOG_ERR, filename, line, 0, ".include not allowed here. Ignoring.");
 198                         return 0;
 199                 }
 200
 201                 log_syntax(unit, LOG_WARNING, filename, line, 0,
 202                            ".include directives are deprecated, and support for them will be removed in a future version of systemd. "
 203                            "Please use drop-in files instead.");
 204
 205                 fn = file_in_same_dir(filename, strstrip(include));
 206                 if (!fn)
 207                         return -ENOMEM;
 208
 209                 return config_parse(unit, fn, NULL, sections, lookup, table, flags, userdata);
 210         }
 211
 212         if (!utf8_is_valid(l))
 213                 return log_syntax_invalid_utf8(unit, LOG_WARNING, filename, line, l);
 214
 215         if (*l == '[') {
 216                 size_t k;
 217                 char *n;
 218
 219                 k = strlen(l);
 220                 assert(k > 0);
 221
 222                 if (l[k-1] != ']') {
 223                         log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid section header '%s'", l);
 224                         return -EBADMSG;
 225                 }
 226
 227                 n = strndup(l+1, k-2);
 228                 if (!n)
 229                         return -ENOMEM;
 230
 231                 if (sections && !nulstr_contains(sections, n)) {
 232
 233                         if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(n, "X-"))
 234                                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown section '%s'. Ignoring.", n);
 235
 236                         free(n);
 237                         *section = mfree(*section);
 238                         *section_line = 0;
 239                         *section_ignored = true;
 240                 } else {
 241                         free_and_replace(*section, n);
 242                         *section_line = line;
 243                         *section_ignored = false;
 244                 }
 245
 246                 return 0;
 247         }
 248
 249         if (sections && !*section) {
 250
 251                 if (!(flags & CONFIG_PARSE_RELAXED) && !*section_ignored)
 252                         log_syntax(unit, LOG_WARNING, filename, line, 0, "Assignment outside of section. Ignoring.");
 253
 254                 return 0;
 255         }
 256
 257         e = strchr(l, '=');
 258         if (!e) {
 259                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Missing '='.");
 260                 return -EINVAL;
 261         }
 262
 263         *e = 0;
 264         e++;
 265
 266         return next_assignment(unit,
 267                                filename,
 268                                line,
 269                                lookup,
 270                                table,
 271                                *section,
 272                                *section_line,
 273                                strstrip(l),
 274                                strstrip(e),
 275                                flags,
 276                                userdata);
 277 }
 278
 279 /* Go through the file and parse each line */
 280 int config_parse(const char *unit,
 281                  const char *filename,
 282                  FILE *f,
 283                  const char *sections,
 284                  ConfigItemLookup lookup,
 285                  const void *table,
 286                  ConfigParseFlags flags,
 287                  void *userdata) {
 288
 289         _cleanup_free_ char *section = NULL, *continuation = NULL;
 290         _cleanup_fclose_ FILE *ours = NULL;
 291         unsigned line = 0, section_line = 0;
 292         bool section_ignored = false;
 293         int r;
 294
 295         assert(filename);
 296         assert(lookup);
 297
 298         if (!f) {
 299                 f = ours = fopen(filename, "re");
 300                 if (!f) {
 301                         /* Only log on request, except for ENOENT,
 302                          * since we return 0 to the caller. */
 303                         if ((flags & CONFIG_PARSE_WARN) || errno == ENOENT)
 304                                 log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_ERR, errno,
 305                                                "Failed to open configuration file '%s': %m", filename);
 306                         return errno == ENOENT ? 0 : -errno;
 307                 }
 308         }
 309
 310         fd_warn_permissions(filename, fileno(f));
 311
 312         for (;;) {
 313                 _cleanup_free_ char *buf = NULL;
 314                 bool escaped = false;
 315                 char *l, *p, *e;
 316
 317                 r = read_line(f, LONG_LINE_MAX, &buf);
 318                 if (r == 0)
 319                         break;
 320                 if (r == -ENOBUFS) {
 321                         if (flags & CONFIG_PARSE_WARN)
 322                                 log_error_errno(r, "%s:%u: Line too long", filename, line);
 323
 324                         return r;
 325                 }
 326                 if (r < 0) {
 327                         if (CONFIG_PARSE_WARN)
 328                                 log_error_errno(r, "%s:%u: Error while reading configuration file: %m", filename, line);
 329
 330                         return r;
 331                 }
 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                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 540                 return 0;
 541         }
 542
 543         *sz = (size_t) v;
 544         return 0;
 545 }
 546
 547 int config_parse_si_size(
 548                 const char* unit,
 549                 const char *filename,
 550                 unsigned line,
 551                 const char *section,
 552                 unsigned section_line,
 553                 const char *lvalue,
 554                 int ltype,
 555                 const char *rvalue,
 556                 void *data,
 557                 void *userdata) {
 558
 559         size_t *sz = data;
 560         uint64_t v;
 561         int r;
 562
 563         assert(filename);
 564         assert(lvalue);
 565         assert(rvalue);
 566         assert(data);
 567
 568         r = parse_size(rvalue, 1000, &v);
 569         if (r < 0 || (uint64_t) (size_t) v != v) {
 570                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", 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_join_controllers(
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         char ****ret = data;
1025         const char *whole_rvalue = rvalue;
1026         unsigned n = 0;
1027         _cleanup_(strv_free_freep) char ***controllers = NULL;
1028
1029         assert(filename);
1030         assert(lvalue);
1031         assert(rvalue);
1032         assert(ret);
1033
1034         for (;;) {
1035                 _cleanup_free_ char *word = NULL;
1036                 char **l;
1037                 int r;
1038
1039                 r = extract_first_word(&rvalue, &word, NULL, EXTRACT_QUOTES);
1040                 if (r < 0) {
1041                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid value for %s: %s", lvalue, whole_rvalue);
1042                         return r;
1043                 }
1044                 if (r == 0)
1045                         break;
1046
1047                 l = strv_split(word, ",");
1048                 if (!l)
1049                         return log_oom();
1050                 strv_uniq(l);
1051
1052                 if (strv_length(l) <= 1) {
1053                         strv_free(l);
1054                         continue;
1055                 }
1056
1057                 if (!controllers) {
1058                         controllers = new(char**, 2);
1059                         if (!controllers) {
1060                                 strv_free(l);
1061                                 return log_oom();
1062                         }
1063
1064                         controllers[0] = l;
1065                         controllers[1] = NULL;
1066
1067                         n = 1;
1068                 } else {
1069                         char ***a;
1070                         char ***t;
1071
1072                         t = new0(char**, n+2);
1073                         if (!t) {
1074                                 strv_free(l);
1075                                 return log_oom();
1076                         }
1077
1078                         n = 0;
1079
1080                         for (a = controllers; *a; a++)
1081                                 if (strv_overlap(*a, l)) {
1082                                         if (strv_extend_strv(&l, *a, false) < 0) {
1083                                                 strv_free(l);
1084                                                 strv_free_free(t);
1085                                                 return log_oom();
1086                                         }
1087
1088                                 } else {
1089                                         char **c;
1090
1091                                         c = strv_copy(*a);
1092                                         if (!c) {
1093                                                 strv_free(l);
1094                                                 strv_free_free(t);
1095                                                 return log_oom();
1096                                         }
1097
1098                                         t[n++] = c;
1099                                 }
1100
1101                         t[n++] = strv_uniq(l);
1102
1103                         strv_free_free(controllers);
1104                         controllers = t;
1105                 }
1106         }
1107         if (!isempty(rvalue))
1108                 log_syntax(unit, LOG_ERR, filename, line, 0, "Trailing garbage, ignoring.");
1109
1110         /* As a special case, return a single empty strv, to override the default */
1111         if (!controllers) {
1112                 controllers = new(char**, 2);
1113                 if (!controllers)
1114                         return log_oom();
1115                 controllers[0] = strv_new(NULL, NULL);
1116                 if (!controllers[0])
1117                         return log_oom();
1118                 controllers[1] = NULL;
1119         }
1120
1121         strv_free_free(*ret);
1122         *ret = TAKE_PTR(controllers);
1123
1124         return 0;
1125 }
1126
1127 int config_parse_mtu(
1128                 const char *unit,
1129                 const char *filename,
1130                 unsigned line,
1131                 const char *section,
1132                 unsigned section_line,
1133                 const char *lvalue,
1134                 int ltype,
1135                 const char *rvalue,
1136                 void *data,
1137                 void *userdata) {
1138
1139         uint32_t *mtu = data;
1140         int r;
1141
1142         assert(rvalue);
1143         assert(mtu);
1144
1145         r = parse_mtu(ltype, rvalue, mtu);
1146         if (r == -ERANGE) {
1147                 log_syntax(unit, LOG_ERR, filename, line, r,
1148                            "Maximum transfer unit (MTU) value out of range. Permitted range is %" PRIu32 "…%" PRIu32 ", ignoring: %s",
1149                            (uint32_t) (ltype == AF_INET6 ? IPV6_MIN_MTU : IPV4_MIN_MTU), (uint32_t) UINT32_MAX,
1150                            rvalue);
1151                 return 0;
1152         }
1153         if (r < 0) {
1154                 log_syntax(unit, LOG_ERR, filename, line, r,
1155                            "Failed to parse MTU value '%s', ignoring: %m", rvalue);
1156                 return 0;
1157         }
1158
1159         return 0;
1160 }
1161
1162 int config_parse_rlimit(
1163                 const char *unit,
1164                 const char *filename,
1165                 unsigned line,
1166                 const char *section,
1167                 unsigned section_line,
1168                 const char *lvalue,
1169                 int ltype,
1170                 const char *rvalue,
1171                 void *data,
1172                 void *userdata) {
1173
1174         struct rlimit **rl = data, d = {};
1175         int r;
1176
1177         assert(rvalue);
1178         assert(rl);
1179
1180         r = rlimit_parse(ltype, rvalue, &d);
1181         if (r == -EILSEQ) {
1182                 log_syntax(unit, LOG_WARNING, filename, line, r, "Soft resource limit chosen higher than hard limit, ignoring: %s", rvalue);
1183                 return 0;
1184         }
1185         if (r < 0) {
1186                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse resource value, ignoring: %s", rvalue);
1187                 return 0;
1188         }
1189
1190         if (rl[ltype])
1191                 *rl[ltype] = d;
1192         else {
1193                 rl[ltype] = newdup(struct rlimit, &d, 1);
1194                 if (!rl[ltype])
1195                         return log_oom();
1196         }
1197
1198         return 0;
1199 }
1200
1201 int config_parse_permille(const char* unit,
1202                           const char *filename,
1203                           unsigned line,
1204                           const char *section,
1205                           unsigned section_line,
1206                           const char *lvalue,
1207                           int ltype,
1208                           const char *rvalue,
1209                           void *data,
1210                           void *userdata) {
1211
1212         unsigned *permille = data;
1213         int r;
1214
1215         assert(filename);
1216         assert(lvalue);
1217         assert(rvalue);
1218         assert(permille);
1219
1220         r = parse_permille(rvalue);
1221         if (r < 0) {
1222                 log_syntax(unit, LOG_ERR, filename, line, r,
1223                            "Failed to parse permille value, ignoring: %s", rvalue);
1224                 return 0;
1225         }
1226
1227         *permille = (unsigned) r;
1228
1229         return 0;
1230 }