src/shared/conf-parser.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2010 Lennart Poettering
   6 ***/
   7
   8 #include <errno.h>
   9 #include <limits.h>
  10 #include <stdint.h>
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <sys/types.h>
  15
  16 #include "alloc-util.h"
  17 #include "conf-files.h"
  18 #include "conf-parser.h"
  19 #include "def.h"
  20 #include "extract-word.h"
  21 #include "fd-util.h"
  22 #include "fileio.h"
  23 #include "fs-util.h"
  24 #include "log.h"
  25 #include "macro.h"
  26 #include "parse-util.h"
  27 #include "path-util.h"
  28 #include "process-util.h"
  29 #include "signal-util.h"
  30 #include "socket-util.h"
  31 #include "string-util.h"
  32 #include "strv.h"
  33 #include "syslog-util.h"
  34 #include "time-util.h"
  35 #include "utf8.h"
  36
  37 /// Additional includes needed by elogind
  38 #include "def.h"
  39 #include "fileio.h"
  40 //#include "rlimit-util.h"
  41 //#include "rlimit-util.h"
  42
  43 int config_item_table_lookup(
  44                 const void *table,
  45                 const char *section,
  46                 const char *lvalue,
  47                 ConfigParserCallback *func,
  48                 int *ltype,
  49                 void **data,
  50                 void *userdata) {
  51
  52         const ConfigTableItem *t;
  53
  54         assert(table);
  55         assert(lvalue);
  56         assert(func);
  57         assert(ltype);
  58         assert(data);
  59
  60         for (t = table; t->lvalue; t++) {
  61
  62                 if (!streq(lvalue, t->lvalue))
  63                         continue;
  64
  65                 if (!streq_ptr(section, t->section))
  66                         continue;
  67
  68                 *func = t->parse;
  69                 *ltype = t->ltype;
  70                 *data = t->data;
  71                 return 1;
  72         }
  73
  74         return 0;
  75 }
  76
  77 int config_item_perf_lookup(
  78                 const void *table,
  79                 const char *section,
  80                 const char *lvalue,
  81                 ConfigParserCallback *func,
  82                 int *ltype,
  83                 void **data,
  84                 void *userdata) {
  85
  86         ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
  87         const ConfigPerfItem *p;
  88
  89         assert(table);
  90         assert(lvalue);
  91         assert(func);
  92         assert(ltype);
  93         assert(data);
  94
  95         if (!section)
  96                 p = lookup(lvalue, strlen(lvalue));
  97         else {
  98                 char *key;
  99
 100                 key = strjoin(section, ".", lvalue);
 101                 if (!key)
 102                         return -ENOMEM;
 103
 104                 p = lookup(key, strlen(key));
 105                 free(key);
 106         }
 107
 108         if (!p)
 109                 return 0;
 110
 111         *func = p->parse;
 112         *ltype = p->ltype;
 113         *data = (uint8_t*) userdata + p->offset;
 114         return 1;
 115 }
 116
 117 /* Run the user supplied parser for an assignment */
 118 static int next_assignment(
 119                 const char *unit,
 120                 const char *filename,
 121                 unsigned line,
 122                 ConfigItemLookup lookup,
 123                 const void *table,
 124                 const char *section,
 125                 unsigned section_line,
 126                 const char *lvalue,
 127                 const char *rvalue,
 128                 ConfigParseFlags flags,
 129                 void *userdata) {
 130
 131         ConfigParserCallback func = NULL;
 132         int ltype = 0;
 133         void *data = NULL;
 134         int r;
 135
 136         assert(filename);
 137         assert(line > 0);
 138         assert(lookup);
 139         assert(lvalue);
 140         assert(rvalue);
 141
 142         r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
 143         if (r < 0)
 144                 return r;
 145
 146         if (r > 0) {
 147                 if (func)
 148                         return func(unit, filename, line, section, section_line,
 149                                     lvalue, ltype, rvalue, data, userdata);
 150
 151                 return 0;
 152         }
 153
 154         /* Warn about unknown non-extension fields. */
 155         if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(lvalue, "X-"))
 156                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown lvalue '%s' in section '%s'", lvalue, section);
 157
 158         return 0;
 159 }
 160
 161 /* Parse a single logical line */
 162 static int parse_line(
 163                 const char* unit,
 164                 const char *filename,
 165                 unsigned line,
 166                 const char *sections,
 167                 ConfigItemLookup lookup,
 168                 const void *table,
 169                 ConfigParseFlags flags,
 170                 char **section,
 171                 unsigned *section_line,
 172                 bool *section_ignored,
 173                 char *l,
 174                 void *userdata) {
 175
 176         char *e, *include;
 177
 178         assert(filename);
 179         assert(line > 0);
 180         assert(lookup);
 181         assert(l);
 182
 183         l = strstrip(l);
 184         if (!*l)
 185                 return 0;
 186
 187         if (strchr(COMMENTS "\n", *l))
 188                 return 0;
 189
 190         include = first_word(l, ".include");
 191         if (include) {
 192                 _cleanup_free_ char *fn = NULL;
 193
 194                 /* .includes are a bad idea, we only support them here
 195                  * for historical reasons. They create cyclic include
 196                  * problems and make it difficult to detect
 197                  * configuration file changes with an easy
 198                  * stat(). Better approaches, such as .d/ drop-in
 199                  * snippets exist.
 200                  *
 201                  * Support for them should be eventually removed. */
 202
 203                 if (!(flags & CONFIG_PARSE_ALLOW_INCLUDE)) {
 204                         log_syntax(unit, LOG_ERR, filename, line, 0, ".include not allowed here. Ignoring.");
 205                         return 0;
 206                 }
 207
 208                 log_syntax(unit, LOG_WARNING, filename, line, 0,
 209                            ".include directives are deprecated, and support for them will be removed in a future version of elogind. "
 210                            "Please use drop-in files instead.");
 211
 212                 fn = file_in_same_dir(filename, strstrip(include));
 213                 if (!fn)
 214                         return -ENOMEM;
 215
 216                 return config_parse(unit, fn, NULL, sections, lookup, table, flags, userdata);
 217         }
 218
 219         if (*l == '[') {
 220                 size_t k;
 221                 char *n;
 222
 223                 k = strlen(l);
 224                 assert(k > 0);
 225
 226                 if (l[k-1] != ']') {
 227                         log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid section header '%s'", l);
 228                         return -EBADMSG;
 229                 }
 230
 231                 n = strndup(l+1, k-2);
 232                 if (!n)
 233                         return -ENOMEM;
 234
 235                 if (sections && !nulstr_contains(sections, n)) {
 236
 237                         if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(n, "X-"))
 238                                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown section '%s'. Ignoring.", n);
 239
 240                         free(n);
 241                         *section = mfree(*section);
 242                         *section_line = 0;
 243                         *section_ignored = true;
 244                 } else {
 245                         free(*section);
 246                         *section = n;
 247                         *section_line = line;
 248                         *section_ignored = false;
 249                 }
 250
 251                 return 0;
 252         }
 253
 254         if (sections && !*section) {
 255
 256                 if (!(flags & CONFIG_PARSE_RELAXED) && !*section_ignored)
 257                         log_syntax(unit, LOG_WARNING, filename, line, 0, "Assignment outside of section. Ignoring.");
 258
 259                 return 0;
 260         }
 261
 262         e = strchr(l, '=');
 263         if (!e) {
 264                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Missing '='.");
 265                 return -EINVAL;
 266         }
 267
 268         *e = 0;
 269         e++;
 270
 271         return next_assignment(unit,
 272                                filename,
 273                                line,
 274                                lookup,
 275                                table,
 276                                *section,
 277                                *section_line,
 278                                strstrip(l),
 279                                strstrip(e),
 280                                flags,
 281                                userdata);
 282 }
 283
 284 /* Go through the file and parse each line */
 285 int config_parse(const char *unit,
 286                  const char *filename,
 287                  FILE *f,
 288                  const char *sections,
 289                  ConfigItemLookup lookup,
 290                  const void *table,
 291                  ConfigParseFlags flags,
 292                  void *userdata) {
 293
 294         _cleanup_free_ char *section = NULL, *continuation = NULL;
 295         _cleanup_fclose_ FILE *ours = NULL;
 296         unsigned line = 0, section_line = 0;
 297         bool section_ignored = false;
 298         int r;
 299
 300         assert(filename);
 301         assert(lookup);
 302
 303         if (!f) {
 304                 f = ours = fopen(filename, "re");
 305                 if (!f) {
 306                         /* Only log on request, except for ENOENT,
 307                          * since we return 0 to the caller. */
 308                         if ((flags & CONFIG_PARSE_WARN) || errno == ENOENT)
 309                                 log_full(errno == ENOENT ? LOG_DEBUG : LOG_ERR,
 310                                          "Failed to open configuration file '%s': %m", filename);
 311                         return errno == ENOENT ? 0 : -errno;
 312                 }
 313         }
 314
 315         fd_warn_permissions(filename, fileno(f));
 316
 317         for (;;) {
 318                 _cleanup_free_ char *buf = NULL;
 319                 bool escaped = false;
 320                 char *l, *p, *e;
 321
 322                 r = read_line(f, LONG_LINE_MAX, &buf);
 323                 if (r == 0)
 324                         break;
 325                 if (r == -ENOBUFS) {
 326                         if (flags & CONFIG_PARSE_WARN)
 327                                 log_error_errno(r, "%s:%u: Line too long", filename, line);
 328
 329                         return r;
 330                 }
 331                 if (r < 0) {
 332                         if (CONFIG_PARSE_WARN)
 333                                 log_error_errno(r, "%s:%u: Error while reading configuration file: %m", filename, line);
 334
 335                         return r;
 336                 }
 337
 338                 l = buf;
 339                 if (!(flags & CONFIG_PARSE_REFUSE_BOM)) {
 340                         char *q;
 341
 342                         q = startswith(buf, UTF8_BYTE_ORDER_MARK);
 343                         if (q) {
 344                                 l = q;
 345                                 flags |= CONFIG_PARSE_REFUSE_BOM;
 346                         }
 347                 }
 348
 349                 if (continuation) {
 350                         if (strlen(continuation) + strlen(l) > LONG_LINE_MAX) {
 351                                 if (flags & CONFIG_PARSE_WARN)
 352                                         log_error("%s:%u: Continuation line too long", filename, line);
 353                                 return -ENOBUFS;
 354                         }
 355
 356                         if (!strextend(&continuation, l, NULL)) {
 357                                 if (flags & CONFIG_PARSE_WARN)
 358                                         log_oom();
 359                                 return -ENOMEM;
 360                         }
 361
 362                         p = continuation;
 363                 } else
 364                         p = l;
 365
 366                 for (e = p; *e; e++) {
 367                         if (escaped)
 368                                 escaped = false;
 369                         else if (*e == '\\')
 370                                 escaped = true;
 371                 }
 372
 373                 if (escaped) {
 374                         *(e-1) = ' ';
 375
 376                         if (!continuation) {
 377                                 continuation = strdup(l);
 378                                 if (!continuation) {
 379                                         if (flags & CONFIG_PARSE_WARN)
 380                                                 log_oom();
 381                                         return -ENOMEM;
 382                                 }
 383                         }
 384
 385                         continue;
 386                 }
 387
 388                 r = parse_line(unit,
 389                                filename,
 390                                ++line,
 391                                sections,
 392                                lookup,
 393                                table,
 394                                flags,
 395                                &section,
 396                                &section_line,
 397                                &section_ignored,
 398                                p,
 399                                userdata);
 400                 if (r < 0) {
 401                         if (flags & CONFIG_PARSE_WARN)
 402                                 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
 403                         return r;
 404
 405                 }
 406
 407                 continuation = mfree(continuation);
 408         }
 409
 410         if (continuation) {
 411                 r = parse_line(unit,
 412                                filename,
 413                                ++line,
 414                                sections,
 415                                lookup,
 416                                table,
 417                                flags,
 418                                &section,
 419                                &section_line,
 420                                &section_ignored,
 421                                continuation,
 422                                userdata);
 423                 if (r < 0) {
 424                         if (flags & CONFIG_PARSE_WARN)
 425                                 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
 426                         return r;
 427
 428                 }
 429         }
 430
 431         return 0;
 432 }
 433
 434 static int config_parse_many_files(
 435                 const char *conf_file,
 436                 char **files,
 437                 const char *sections,
 438                 ConfigItemLookup lookup,
 439                 const void *table,
 440                 ConfigParseFlags flags,
 441                 void *userdata) {
 442
 443         char **fn;
 444         int r;
 445
 446         if (conf_file) {
 447                 r = config_parse(NULL, conf_file, NULL, sections, lookup, table, flags, userdata);
 448                 if (r < 0)
 449                         return r;
 450         }
 451
 452         STRV_FOREACH(fn, files) {
 453                 r = config_parse(NULL, *fn, NULL, sections, lookup, table, flags, userdata);
 454                 if (r < 0)
 455                         return r;
 456         }
 457
 458         return 0;
 459 }
 460
 461 /* Parse each config file in the directories specified as nulstr. */
 462 int config_parse_many_nulstr(
 463                 const char *conf_file,
 464                 const char *conf_file_dirs,
 465                 const char *sections,
 466                 ConfigItemLookup lookup,
 467                 const void *table,
 468                 ConfigParseFlags flags,
 469                 void *userdata) {
 470
 471         _cleanup_strv_free_ char **files = NULL;
 472         int r;
 473
 474         r = conf_files_list_nulstr(&files, ".conf", NULL, 0, conf_file_dirs);
 475         if (r < 0)
 476                 return r;
 477
 478         return config_parse_many_files(conf_file, files, sections, lookup, table, flags, userdata);
 479 }
 480
 481 #if 0 /// UNNEEDED by elogind
 482 /* Parse each config file in the directories specified as strv. */
 483 int config_parse_many(
 484                 const char *conf_file,
 485                 const char* const* conf_file_dirs,
 486                 const char *dropin_dirname,
 487                 const char *sections,
 488                 ConfigItemLookup lookup,
 489                 const void *table,
 490                 ConfigParseFlags flags,
 491                 void *userdata) {
 492
 493         _cleanup_strv_free_ char **dropin_dirs = NULL;
 494         _cleanup_strv_free_ char **files = NULL;
 495         const char *suffix;
 496         int r;
 497
 498         suffix = strjoina("/", dropin_dirname);
 499         r = strv_extend_strv_concat(&dropin_dirs, (char**) conf_file_dirs, suffix);
 500         if (r < 0)
 501                 return r;
 502
 503         r = conf_files_list_strv(&files, ".conf", NULL, 0, (const char* const*) dropin_dirs);
 504         if (r < 0)
 505                 return r;
 506
 507         return config_parse_many_files(conf_file, files, sections, lookup, table, flags, userdata);
 508 }
 509 #endif // 0
 510
 511 #define DEFINE_PARSER(type, vartype, conv_func)                         \
 512         int config_parse_##type(                                        \
 513                         const char *unit,                               \
 514                         const char *filename,                           \
 515                         unsigned line,                                  \
 516                         const char *section,                            \
 517                         unsigned section_line,                          \
 518                         const char *lvalue,                             \
 519                         int ltype,                                      \
 520                         const char *rvalue,                             \
 521                         void *data,                                     \
 522                         void *userdata) {                               \
 523                                                                         \
 524                 vartype *i = data;                                      \
 525                 int r;                                                  \
 526                                                                         \
 527                 assert(filename);                                       \
 528                 assert(lvalue);                                         \
 529                 assert(rvalue);                                         \
 530                 assert(data);                                           \
 531                                                                         \
 532                 r = conv_func(rvalue, i);                               \
 533                 if (r < 0)                                              \
 534                         log_syntax(unit, LOG_ERR, filename, line, r,    \
 535                                    "Failed to parse %s value, ignoring: %s", \
 536                                    #type, rvalue);                      \
 537                                                                         \
 538                 return 0;                                               \
 539         }
 540
 541 DEFINE_PARSER(int, int, safe_atoi);
 542 DEFINE_PARSER(long, long, safe_atoli);
 543 #if 0 /// UNNEEDED by elogind
 544 DEFINE_PARSER(uint8, uint8_t, safe_atou8);
 545 DEFINE_PARSER(uint16, uint16_t, safe_atou16);
 546 DEFINE_PARSER(uint32, uint32_t, safe_atou32);
 547 #endif // 0
 548 DEFINE_PARSER(uint64, uint64_t, safe_atou64);
 549 DEFINE_PARSER(unsigned, unsigned, safe_atou);
 550 DEFINE_PARSER(double, double, safe_atod);
 551 #if 0 /// UNNEEDED by elogind
 552 DEFINE_PARSER(nsec, nsec_t, parse_nsec);
 553 #endif // 0
 554 DEFINE_PARSER(sec, usec_t, parse_sec);
 555 DEFINE_PARSER(mode, mode_t, parse_mode);
 556
 557 int config_parse_iec_size(const char* unit,
 558                             const char *filename,
 559                             unsigned line,
 560                             const char *section,
 561                             unsigned section_line,
 562                             const char *lvalue,
 563                             int ltype,
 564                             const char *rvalue,
 565                             void *data,
 566                             void *userdata) {
 567
 568         size_t *sz = data;
 569         uint64_t v;
 570         int r;
 571
 572         assert(filename);
 573         assert(lvalue);
 574         assert(rvalue);
 575         assert(data);
 576
 577         r = parse_size(rvalue, 1024, &v);
 578         if (r < 0 || (uint64_t) (size_t) v != v) {
 579                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 580                 return 0;
 581         }
 582
 583         *sz = (size_t) v;
 584         return 0;
 585 }
 586
 587 #if 0 /// UNNEEDED by elogind
 588 int config_parse_si_size(
 589                 const char* unit,
 590                 const char *filename,
 591                 unsigned line,
 592                 const char *section,
 593                 unsigned section_line,
 594                 const char *lvalue,
 595                 int ltype,
 596                 const char *rvalue,
 597                 void *data,
 598                 void *userdata) {
 599
 600         size_t *sz = data;
 601         uint64_t v;
 602         int r;
 603
 604         assert(filename);
 605         assert(lvalue);
 606         assert(rvalue);
 607         assert(data);
 608
 609         r = parse_size(rvalue, 1000, &v);
 610         if (r < 0 || (uint64_t) (size_t) v != v) {
 611                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 612                 return 0;
 613         }
 614
 615         *sz = (size_t) v;
 616         return 0;
 617 }
 618
 619 int config_parse_iec_uint64(
 620                 const char* unit,
 621                 const char *filename,
 622                 unsigned line,
 623                 const char *section,
 624                 unsigned section_line,
 625                 const char *lvalue,
 626                 int ltype,
 627                 const char *rvalue,
 628                 void *data,
 629                 void *userdata) {
 630
 631         uint64_t *bytes = data;
 632         int r;
 633
 634         assert(filename);
 635         assert(lvalue);
 636         assert(rvalue);
 637         assert(data);
 638
 639         r = parse_size(rvalue, 1024, bytes);
 640         if (r < 0)
 641                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 642
 643         return 0;
 644 }
 645 #endif // 0
 646
 647 int config_parse_bool(const char* unit,
 648                       const char *filename,
 649                       unsigned line,
 650                       const char *section,
 651                       unsigned section_line,
 652                       const char *lvalue,
 653                       int ltype,
 654                       const char *rvalue,
 655                       void *data,
 656                       void *userdata) {
 657
 658         int k;
 659         bool *b = data;
 660         bool fatal = ltype;
 661
 662         assert(filename);
 663         assert(lvalue);
 664         assert(rvalue);
 665         assert(data);
 666
 667         k = parse_boolean(rvalue);
 668         if (k < 0) {
 669                 log_syntax(unit, LOG_ERR, filename, line, k,
 670                            "Failed to parse boolean value%s: %s",
 671                            fatal ? "" : ", ignoring", rvalue);
 672                 return fatal ? -ENOEXEC : 0;
 673         }
 674
 675         *b = !!k;
 676         return 0;
 677 }
 678
 679 #if 0 /// UNNEEDED by elogind
 680 int config_parse_tristate(
 681                 const char* unit,
 682                 const char *filename,
 683                 unsigned line,
 684                 const char *section,
 685                 unsigned section_line,
 686                 const char *lvalue,
 687                 int ltype,
 688                 const char *rvalue,
 689                 void *data,
 690                 void *userdata) {
 691
 692         int k, *t = data;
 693
 694         assert(filename);
 695         assert(lvalue);
 696         assert(rvalue);
 697         assert(data);
 698
 699         /* A tristate is pretty much a boolean, except that it can
 700          * also take the special value -1, indicating "uninitialized",
 701          * much like NULL is for a pointer type. */
 702
 703         k = parse_boolean(rvalue);
 704         if (k < 0) {
 705                 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
 706                 return 0;
 707         }
 708
 709         *t = !!k;
 710         return 0;
 711 }
 712 #endif // 0
 713
 714 int config_parse_string(
 715                 const char *unit,
 716                 const char *filename,
 717                 unsigned line,
 718                 const char *section,
 719                 unsigned section_line,
 720                 const char *lvalue,
 721                 int ltype,
 722                 const char *rvalue,
 723                 void *data,
 724                 void *userdata) {
 725
 726         char **s = data;
 727
 728         assert(filename);
 729         assert(lvalue);
 730         assert(rvalue);
 731         assert(data);
 732
 733         if (!utf8_is_valid(rvalue)) {
 734                 log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 735                 return 0;
 736         }
 737
 738         if (free_and_strdup(s, empty_to_null(rvalue)) < 0)
 739                 return log_oom();
 740
 741         return 0;
 742 }
 743
 744 int config_parse_path(
 745                 const char *unit,
 746                 const char *filename,
 747                 unsigned line,
 748                 const char *section,
 749                 unsigned section_line,
 750                 const char *lvalue,
 751                 int ltype,
 752                 const char *rvalue,
 753                 void *data,
 754                 void *userdata) {
 755
 756         char **s = data, *n;
 757         bool fatal = ltype;
 758
 759         assert(filename);
 760         assert(lvalue);
 761         assert(rvalue);
 762         assert(data);
 763
 764         if (isempty(rvalue)) {
 765                 n = NULL;
 766                 goto finalize;
 767         }
 768
 769         if (!utf8_is_valid(rvalue)) {
 770                 log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 771                 return fatal ? -ENOEXEC : 0;
 772         }
 773
 774         if (!path_is_absolute(rvalue)) {
 775                 log_syntax(unit, LOG_ERR, filename, line, 0,
 776                            "Not an absolute path%s: %s",
 777                            fatal ? "" : ", ignoring", rvalue);
 778                 return fatal ? -ENOEXEC : 0;
 779         }
 780
 781         n = strdup(rvalue);
 782         if (!n)
 783                 return log_oom();
 784
 785         path_kill_slashes(n);
 786
 787 finalize:
 788         free(*s);
 789         *s = n;
 790
 791         return 0;
 792 }
 793
 794 int config_parse_strv(
 795                 const char *unit,
 796                 const char *filename,
 797                 unsigned line,
 798                 const char *section,
 799                 unsigned section_line,
 800                 const char *lvalue,
 801                 int ltype,
 802                 const char *rvalue,
 803                 void *data,
 804                 void *userdata) {
 805
 806         char ***sv = data;
 807         int r;
 808
 809         assert(filename);
 810         assert(lvalue);
 811         assert(rvalue);
 812         assert(data);
 813
 814         if (isempty(rvalue)) {
 815                 *sv = strv_free(*sv);
 816                 return 0;
 817         }
 818
 819         for (;;) {
 820                 char *word = NULL;
 821
 822                 r = extract_first_word(&rvalue, &word, NULL, EXTRACT_QUOTES|EXTRACT_RETAIN_ESCAPE);
 823                 if (r == 0)
 824                         break;
 825                 if (r == -ENOMEM)
 826                         return log_oom();
 827                 if (r < 0) {
 828                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
 829                         break;
 830                 }
 831
 832                 if (!utf8_is_valid(word)) {
 833                         log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, word);
 834                         free(word);
 835                         continue;
 836                 }
 837
 838                 r = strv_consume(sv, word);
 839                 if (r < 0)
 840                         return log_oom();
 841         }
 842
 843         return 0;
 844 }
 845
 846 int config_parse_warn_compat(
 847                 const char *unit,
 848                 const char *filename,
 849                 unsigned line,
 850                 const char *section,
 851                 unsigned section_line,
 852                 const char *lvalue,
 853                 int ltype,
 854                 const char *rvalue,
 855                 void *data,
 856                 void *userdata) {
 857         Disabled reason = ltype;
 858
 859         switch(reason) {
 860         case DISABLED_CONFIGURATION:
 861                 log_syntax(unit, LOG_DEBUG, filename, line, 0,
 862                            "Support for option %s= has been disabled at compile time and it is ignored", lvalue);
 863                 break;
 864         case DISABLED_LEGACY:
 865                 log_syntax(unit, LOG_INFO, filename, line, 0,
 866                            "Support for option %s= has been removed and it is ignored", lvalue);
 867                 break;
 868         case DISABLED_EXPERIMENTAL:
 869                 log_syntax(unit, LOG_INFO, filename, line, 0,
 870                            "Support for option %s= has not yet been enabled and it is ignored", lvalue);
 871                 break;
 872         };
 873
 874         return 0;
 875 }
 876
 877 #if 0 /// UNNEEDED by elogind
 878 int config_parse_log_facility(
 879                 const char *unit,
 880                 const char *filename,
 881                 unsigned line,
 882                 const char *section,
 883                 unsigned section_line,
 884                 const char *lvalue,
 885                 int ltype,
 886                 const char *rvalue,
 887                 void *data,
 888                 void *userdata) {
 889
 890         int *o = data, x;
 891
 892         assert(filename);
 893         assert(lvalue);
 894         assert(rvalue);
 895         assert(data);
 896
 897         x = log_facility_unshifted_from_string(rvalue);
 898         if (x < 0) {
 899                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log facility, ignoring: %s", rvalue);
 900                 return 0;
 901         }
 902
 903         *o = (x << 3) | LOG_PRI(*o);
 904
 905         return 0;
 906 }
 907 #endif // 0
 908
 909 int config_parse_log_level(
 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         int *o = data, x;
 922
 923         assert(filename);
 924         assert(lvalue);
 925         assert(rvalue);
 926         assert(data);
 927
 928         x = log_level_from_string(rvalue);
 929         if (x < 0) {
 930                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log level, ignoring: %s", rvalue);
 931                 return 0;
 932         }
 933
 934         if (*o < 0) /* if it wasn't initialized so far, assume zero facility */
 935                 *o = x;
 936         else
 937                 *o = (*o & LOG_FACMASK) | x;
 938
 939         return 0;
 940 }
 941
 942 int config_parse_signal(
 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         int *sig = data, r;
 955
 956         assert(filename);
 957         assert(lvalue);
 958         assert(rvalue);
 959         assert(sig);
 960
 961         r = signal_from_string(rvalue);
 962         if (r <= 0) {
 963                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse signal name, ignoring: %s", rvalue);
 964                 return 0;
 965         }
 966
 967         *sig = r;
 968         return 0;
 969 }
 970
 971 #if 0 /// UNNEEDED by elogind
 972 int config_parse_personality(
 973                 const char *unit,
 974                 const char *filename,
 975                 unsigned line,
 976                 const char *section,
 977                 unsigned section_line,
 978                 const char *lvalue,
 979                 int ltype,
 980                 const char *rvalue,
 981                 void *data,
 982                 void *userdata) {
 983
 984         unsigned long *personality = data, p;
 985
 986         assert(filename);
 987         assert(lvalue);
 988         assert(rvalue);
 989         assert(personality);
 990
 991         if (isempty(rvalue))
 992                 p = PERSONALITY_INVALID;
 993         else {
 994                 p = personality_from_string(rvalue);
 995                 if (p == PERSONALITY_INVALID) {
 996                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse personality, ignoring: %s", rvalue);
 997                         return 0;
 998                 }
 999         }
1000
1001         *personality = p;
1002         return 0;
1003 }
1004
1005 int config_parse_ifname(
1006                 const char *unit,
1007                 const char *filename,
1008                 unsigned line,
1009                 const char *section,
1010                 unsigned section_line,
1011                 const char *lvalue,
1012                 int ltype,
1013                 const char *rvalue,
1014                 void *data,
1015                 void *userdata) {
1016
1017         char **s = data;
1018         int r;
1019
1020         assert(filename);
1021         assert(lvalue);
1022         assert(rvalue);
1023         assert(data);
1024
1025         if (isempty(rvalue)) {
1026                 *s = mfree(*s);
1027                 return 0;
1028         }
1029
1030         if (!ifname_valid(rvalue)) {
1031                 log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue);
1032                 return 0;
1033         }
1034
1035         r = free_and_strdup(s, rvalue);
1036         if (r < 0)
1037                 return log_oom();
1038
1039         return 0;
1040 }
1041
1042 int config_parse_ip_port(
1043                 const char *unit,
1044                 const char *filename,
1045                 unsigned line,
1046                 const char *section,
1047                 unsigned section_line,
1048                 const char *lvalue,
1049                 int ltype,
1050                 const char *rvalue,
1051                 void *data,
1052                 void *userdata) {
1053
1054         uint16_t *s = data;
1055         uint16_t port;
1056         int r;
1057
1058         assert(filename);
1059         assert(lvalue);
1060         assert(rvalue);
1061         assert(data);
1062
1063         if (isempty(rvalue)) {
1064                 *s = 0;
1065                 return 0;
1066         }
1067
1068         r = parse_ip_port(rvalue, &port);
1069         if (r < 0) {
1070                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse port '%s'.", rvalue);
1071                 return 0;
1072         }
1073
1074         *s = port;
1075
1076         return 0;
1077 }
1078
1079 int config_parse_join_controllers(
1080                 const char *unit,
1081                 const char *filename,
1082                 unsigned line,
1083                 const char *section,
1084                 unsigned section_line,
1085                 const char *lvalue,
1086                 int ltype,
1087                 const char *rvalue,
1088                 void *data,
1089                 void *userdata) {
1090
1091         char ****ret = data;
1092         const char *whole_rvalue = rvalue;
1093         unsigned n = 0;
1094         _cleanup_(strv_free_freep) char ***controllers = NULL;
1095
1096         assert(filename);
1097         assert(lvalue);
1098         assert(rvalue);
1099         assert(ret);
1100
1101         for (;;) {
1102                 _cleanup_free_ char *word = NULL;
1103                 char **l;
1104                 int r;
1105
1106                 r = extract_first_word(&rvalue, &word, NULL, EXTRACT_QUOTES);
1107                 if (r < 0) {
1108                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid value for %s: %s", lvalue, whole_rvalue);
1109                         return r;
1110                 }
1111                 if (r == 0)
1112                         break;
1113
1114                 l = strv_split(word, ",");
1115                 if (!l)
1116                         return log_oom();
1117                 strv_uniq(l);
1118
1119                 if (strv_length(l) <= 1) {
1120                         strv_free(l);
1121                         continue;
1122                 }
1123
1124                 if (!controllers) {
1125                         controllers = new(char**, 2);
1126                         if (!controllers) {
1127                                 strv_free(l);
1128                                 return log_oom();
1129                         }
1130
1131                         controllers[0] = l;
1132                         controllers[1] = NULL;
1133
1134                         n = 1;
1135                 } else {
1136                         char ***a;
1137                         char ***t;
1138
1139                         t = new0(char**, n+2);
1140                         if (!t) {
1141                                 strv_free(l);
1142                                 return log_oom();
1143                         }
1144
1145                         n = 0;
1146
1147                         for (a = controllers; *a; a++)
1148                                 if (strv_overlap(*a, l)) {
1149                                         if (strv_extend_strv(&l, *a, false) < 0) {
1150                                                 strv_free(l);
1151                                                 strv_free_free(t);
1152                                                 return log_oom();
1153                                         }
1154
1155                                 } else {
1156                                         char **c;
1157
1158                                         c = strv_copy(*a);
1159                                         if (!c) {
1160                                                 strv_free(l);
1161                                                 strv_free_free(t);
1162                                                 return log_oom();
1163                                         }
1164
1165                                         t[n++] = c;
1166                                 }
1167
1168                         t[n++] = strv_uniq(l);
1169
1170                         strv_free_free(controllers);
1171                         controllers = t;
1172                 }
1173         }
1174         if (!isempty(rvalue))
1175                 log_syntax(unit, LOG_ERR, filename, line, 0, "Trailing garbage, ignoring.");
1176
1177         /* As a special case, return a single empty strv, to override the default */
1178         if (!controllers) {
1179                 controllers = new(char**, 2);
1180                 if (!controllers)
1181                         return log_oom();
1182                 controllers[0] = strv_new(NULL, NULL);
1183                 if (!controllers[0])
1184                         return log_oom();
1185                 controllers[1] = NULL;
1186         }
1187
1188         strv_free_free(*ret);
1189         *ret = TAKE_PTR(controllers);
1190
1191         return 0;
1192 }
1193 #endif // 0
1194
1195 int config_parse_mtu(
1196                 const char *unit,
1197                 const char *filename,
1198                 unsigned line,
1199                 const char *section,
1200                 unsigned section_line,
1201                 const char *lvalue,
1202                 int ltype,
1203                 const char *rvalue,
1204                 void *data,
1205                 void *userdata) {
1206
1207         uint32_t *mtu = data;
1208         int r;
1209
1210         assert(rvalue);
1211         assert(mtu);
1212
1213         r = parse_mtu(ltype, rvalue, mtu);
1214         if (r == -ERANGE) {
1215                 log_syntax(unit, LOG_ERR, filename, line, r,
1216                            "Maximum transfer unit (MTU) value out of range. Permitted range is %" PRIu32 "…%" PRIu32 ", ignoring: %s",
1217                            (uint32_t) (ltype == AF_INET6 ? IPV6_MIN_MTU : IPV4_MIN_MTU), (uint32_t) UINT32_MAX,
1218                            rvalue);
1219                 return 0;
1220         }
1221         if (r < 0) {
1222                 log_syntax(unit, LOG_ERR, filename, line, r,
1223                            "Failed to parse MTU value '%s', ignoring: %m", rvalue);
1224                 return 0;
1225         }
1226
1227         return 0;
1228 }
1229
1230 int config_parse_rlimit(
1231                 const char *unit,
1232                 const char *filename,
1233                 unsigned line,
1234                 const char *section,
1235                 unsigned section_line,
1236                 const char *lvalue,
1237                 int ltype,
1238                 const char *rvalue,
1239                 void *data,
1240                 void *userdata) {
1241
1242         struct rlimit **rl = data, d = {};
1243         int r;
1244
1245         assert(rvalue);
1246         assert(rl);
1247
1248         r = rlimit_parse(ltype, rvalue, &d);
1249         if (r == -EILSEQ) {
1250                 log_syntax(unit, LOG_WARNING, filename, line, r, "Soft resource limit chosen higher than hard limit, ignoring: %s", rvalue);
1251                 return 0;
1252         }
1253         if (r < 0) {
1254                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse resource value, ignoring: %s", rvalue);
1255                 return 0;
1256         }
1257
1258         if (rl[ltype])
1259                 *rl[ltype] = d;
1260         else {
1261                 rl[ltype] = newdup(struct rlimit, &d, 1);
1262                 if (!rl[ltype])
1263                         return log_oom();
1264         }
1265
1266         return 0;
1267 }