src/shared/conf-parser.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4 #include <limits.h>
   5 #include <stdint.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <sys/types.h>
  10
  11 #include "alloc-util.h"
  12 #include "conf-files.h"
  13 #include "conf-parser.h"
  14 #include "def.h"
  15 #include "extract-word.h"
  16 #include "fd-util.h"
  17 #include "fileio.h"
  18 #include "fs-util.h"
  19 #include "log.h"
  20 #include "macro.h"
  21 #include "missing.h"
  22 #include "parse-util.h"
  23 #include "path-util.h"
  24 #include "process-util.h"
  25 #include "rlimit-util.h"
  26 #include "signal-util.h"
  27 #include "socket-util.h"
  28 #include "string-util.h"
  29 #include "strv.h"
  30 #include "syslog-util.h"
  31 #include "time-util.h"
  32 #include "utf8.h"
  33
  34 int config_item_table_lookup(
  35                 const void *table,
  36                 const char *section,
  37                 const char *lvalue,
  38                 ConfigParserCallback *func,
  39                 int *ltype,
  40                 void **data,
  41                 void *userdata) {
  42
  43         const ConfigTableItem *t;
  44
  45         assert(table);
  46         assert(lvalue);
  47         assert(func);
  48         assert(ltype);
  49         assert(data);
  50
  51         for (t = table; t->lvalue; t++) {
  52
  53                 if (!streq(lvalue, t->lvalue))
  54                         continue;
  55
  56                 if (!streq_ptr(section, t->section))
  57                         continue;
  58
  59                 *func = t->parse;
  60                 *ltype = t->ltype;
  61                 *data = t->data;
  62                 return 1;
  63         }
  64
  65         return 0;
  66 }
  67
  68 int config_item_perf_lookup(
  69                 const void *table,
  70                 const char *section,
  71                 const char *lvalue,
  72                 ConfigParserCallback *func,
  73                 int *ltype,
  74                 void **data,
  75                 void *userdata) {
  76
  77         ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
  78         const ConfigPerfItem *p;
  79
  80         assert(table);
  81         assert(lvalue);
  82         assert(func);
  83         assert(ltype);
  84         assert(data);
  85
  86         if (section) {
  87                 const char *key;
  88
  89                 key = strjoina(section, ".", lvalue);
  90                 p = lookup(key, strlen(key));
  91         } else
  92                 p = lookup(lvalue, strlen(lvalue));
  93         if (!p)
  94                 return 0;
  95
  96         *func = p->parse;
  97         *ltype = p->ltype;
  98         *data = (uint8_t*) userdata + p->offset;
  99         return 1;
 100 }
 101
 102 /* Run the user supplied parser for an assignment */
 103 static int next_assignment(
 104                 const char *unit,
 105                 const char *filename,
 106                 unsigned line,
 107                 ConfigItemLookup lookup,
 108                 const void *table,
 109                 const char *section,
 110                 unsigned section_line,
 111                 const char *lvalue,
 112                 const char *rvalue,
 113                 ConfigParseFlags flags,
 114                 void *userdata) {
 115
 116         ConfigParserCallback func = NULL;
 117         int ltype = 0;
 118         void *data = NULL;
 119         int r;
 120
 121         assert(filename);
 122         assert(line > 0);
 123         assert(lookup);
 124         assert(lvalue);
 125         assert(rvalue);
 126
 127         r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
 128         if (r < 0)
 129                 return r;
 130         if (r > 0) {
 131                 if (func)
 132                         return func(unit, filename, line, section, section_line,
 133                                     lvalue, ltype, rvalue, data, userdata);
 134
 135                 return 0;
 136         }
 137
 138         /* Warn about unknown non-extension fields. */
 139         if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(lvalue, "X-"))
 140                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown lvalue '%s' in section '%s'", lvalue, section);
 141
 142         return 0;
 143 }
 144
 145 /* Parse a single logical line */
 146 static int parse_line(
 147                 const char* unit,
 148                 const char *filename,
 149                 unsigned line,
 150                 const char *sections,
 151                 ConfigItemLookup lookup,
 152                 const void *table,
 153                 ConfigParseFlags flags,
 154                 char **section,
 155                 unsigned *section_line,
 156                 bool *section_ignored,
 157                 char *l,
 158                 void *userdata) {
 159
 160         char *e, *include;
 161
 162         assert(filename);
 163         assert(line > 0);
 164         assert(lookup);
 165         assert(l);
 166
 167         l = strstrip(l);
 168         if (!*l)
 169                 return 0;
 170
 171         if (*l == '\n')
 172                 return 0;
 173
 174         include = first_word(l, ".include");
 175         if (include) {
 176                 _cleanup_free_ char *fn = NULL;
 177
 178                 /* .includes are a bad idea, we only support them here
 179                  * for historical reasons. They create cyclic include
 180                  * problems and make it difficult to detect
 181                  * configuration file changes with an easy
 182                  * stat(). Better approaches, such as .d/ drop-in
 183                  * snippets exist.
 184                  *
 185                  * Support for them should be eventually removed. */
 186
 187                 if (!(flags & CONFIG_PARSE_ALLOW_INCLUDE)) {
 188                         log_syntax(unit, LOG_ERR, filename, line, 0, ".include not allowed here. Ignoring.");
 189                         return 0;
 190                 }
 191
 192                 log_syntax(unit, LOG_WARNING, filename, line, 0,
 193                            ".include directives are deprecated, and support for them will be removed in a future version of systemd. "
 194                            "Please use drop-in files instead.");
 195
 196                 fn = file_in_same_dir(filename, strstrip(include));
 197                 if (!fn)
 198                         return -ENOMEM;
 199
 200                 return config_parse(unit, fn, NULL, sections, lookup, table, flags, userdata);
 201         }
 202
 203         if (!utf8_is_valid(l))
 204                 return log_syntax_invalid_utf8(unit, LOG_WARNING, filename, line, l);
 205
 206         if (*l == '[') {
 207                 size_t k;
 208                 char *n;
 209
 210                 k = strlen(l);
 211                 assert(k > 0);
 212
 213                 if (l[k-1] != ']') {
 214                         log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid section header '%s'", l);
 215                         return -EBADMSG;
 216                 }
 217
 218                 n = strndup(l+1, k-2);
 219                 if (!n)
 220                         return -ENOMEM;
 221
 222                 if (sections && !nulstr_contains(sections, n)) {
 223
 224                         if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(n, "X-"))
 225                                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown section '%s'. Ignoring.", n);
 226
 227                         free(n);
 228                         *section = mfree(*section);
 229                         *section_line = 0;
 230                         *section_ignored = true;
 231                 } else {
 232                         free_and_replace(*section, n);
 233                         *section_line = line;
 234                         *section_ignored = false;
 235                 }
 236
 237                 return 0;
 238         }
 239
 240         if (sections && !*section) {
 241
 242                 if (!(flags & CONFIG_PARSE_RELAXED) && !*section_ignored)
 243                         log_syntax(unit, LOG_WARNING, filename, line, 0, "Assignment outside of section. Ignoring.");
 244
 245                 return 0;
 246         }
 247
 248         e = strchr(l, '=');
 249         if (!e) {
 250                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Missing '='.");
 251                 return -EINVAL;
 252         }
 253
 254         *e = 0;
 255         e++;
 256
 257         return next_assignment(unit,
 258                                filename,
 259                                line,
 260                                lookup,
 261                                table,
 262                                *section,
 263                                *section_line,
 264                                strstrip(l),
 265                                strstrip(e),
 266                                flags,
 267                                userdata);
 268 }
 269
 270 /* Go through the file and parse each line */
 271 int config_parse(const char *unit,
 272                  const char *filename,
 273                  FILE *f,
 274                  const char *sections,
 275                  ConfigItemLookup lookup,
 276                  const void *table,
 277                  ConfigParseFlags flags,
 278                  void *userdata) {
 279
 280         _cleanup_free_ char *section = NULL, *continuation = NULL;
 281         _cleanup_fclose_ FILE *ours = NULL;
 282         unsigned line = 0, section_line = 0;
 283         bool section_ignored = false;
 284         int r;
 285
 286         assert(filename);
 287         assert(lookup);
 288
 289         if (!f) {
 290                 f = ours = fopen(filename, "re");
 291                 if (!f) {
 292                         /* Only log on request, except for ENOENT,
 293                          * since we return 0 to the caller. */
 294                         if ((flags & CONFIG_PARSE_WARN) || errno == ENOENT)
 295                                 log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_ERR, errno,
 296                                                "Failed to open configuration file '%s': %m", filename);
 297                         return errno == ENOENT ? 0 : -errno;
 298                 }
 299         }
 300
 301         fd_warn_permissions(filename, fileno(f));
 302
 303         for (;;) {
 304                 _cleanup_free_ char *buf = NULL;
 305                 bool escaped = false;
 306                 char *l, *p, *e;
 307
 308                 r = read_line(f, LONG_LINE_MAX, &buf);
 309                 if (r == 0)
 310                         break;
 311                 if (r == -ENOBUFS) {
 312                         if (flags & CONFIG_PARSE_WARN)
 313                                 log_error_errno(r, "%s:%u: Line too long", filename, line);
 314
 315                         return r;
 316                 }
 317                 if (r < 0) {
 318                         if (CONFIG_PARSE_WARN)
 319                                 log_error_errno(r, "%s:%u: Error while reading configuration file: %m", filename, line);
 320
 321                         return r;
 322                 }
 323
 324                 if (strchr(COMMENTS, *buf))
 325                         continue;
 326
 327                 l = buf;
 328                 if (!(flags & CONFIG_PARSE_REFUSE_BOM)) {
 329                         char *q;
 330
 331                         q = startswith(buf, UTF8_BYTE_ORDER_MARK);
 332                         if (q) {
 333                                 l = q;
 334                                 flags |= CONFIG_PARSE_REFUSE_BOM;
 335                         }
 336                 }
 337
 338                 if (continuation) {
 339                         if (strlen(continuation) + strlen(l) > LONG_LINE_MAX) {
 340                                 if (flags & CONFIG_PARSE_WARN)
 341                                         log_error("%s:%u: Continuation line too long", filename, line);
 342                                 return -ENOBUFS;
 343                         }
 344
 345                         if (!strextend(&continuation, l, NULL)) {
 346                                 if (flags & CONFIG_PARSE_WARN)
 347                                         log_oom();
 348                                 return -ENOMEM;
 349                         }
 350
 351                         p = continuation;
 352                 } else
 353                         p = l;
 354
 355                 for (e = p; *e; e++) {
 356                         if (escaped)
 357                                 escaped = false;
 358                         else if (*e == '\\')
 359                                 escaped = true;
 360                 }
 361
 362                 if (escaped) {
 363                         *(e-1) = ' ';
 364
 365                         if (!continuation) {
 366                                 continuation = strdup(l);
 367                                 if (!continuation) {
 368                                         if (flags & CONFIG_PARSE_WARN)
 369                                                 log_oom();
 370                                         return -ENOMEM;
 371                                 }
 372                         }
 373
 374                         continue;
 375                 }
 376
 377                 r = parse_line(unit,
 378                                filename,
 379                                ++line,
 380                                sections,
 381                                lookup,
 382                                table,
 383                                flags,
 384                                &section,
 385                                &section_line,
 386                                &section_ignored,
 387                                p,
 388                                userdata);
 389                 if (r < 0) {
 390                         if (flags & CONFIG_PARSE_WARN)
 391                                 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
 392                         return r;
 393                 }
 394
 395                 continuation = mfree(continuation);
 396         }
 397
 398         if (continuation) {
 399                 r = parse_line(unit,
 400                                filename,
 401                                ++line,
 402                                sections,
 403                                lookup,
 404                                table,
 405                                flags,
 406                                &section,
 407                                &section_line,
 408                                &section_ignored,
 409                                continuation,
 410                                userdata);
 411                 if (r < 0) {
 412                         if (flags & CONFIG_PARSE_WARN)
 413                                 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
 414                         return r;
 415                 }
 416         }
 417
 418         return 0;
 419 }
 420
 421 static int config_parse_many_files(
 422                 const char *conf_file,
 423                 char **files,
 424                 const char *sections,
 425                 ConfigItemLookup lookup,
 426                 const void *table,
 427                 ConfigParseFlags flags,
 428                 void *userdata) {
 429
 430         char **fn;
 431         int r;
 432
 433         if (conf_file) {
 434                 r = config_parse(NULL, conf_file, NULL, sections, lookup, table, flags, userdata);
 435                 if (r < 0)
 436                         return r;
 437         }
 438
 439         STRV_FOREACH(fn, files) {
 440                 r = config_parse(NULL, *fn, NULL, sections, lookup, table, flags, userdata);
 441                 if (r < 0)
 442                         return r;
 443         }
 444
 445         return 0;
 446 }
 447
 448 /* Parse each config file in the directories specified as nulstr. */
 449 int config_parse_many_nulstr(
 450                 const char *conf_file,
 451                 const char *conf_file_dirs,
 452                 const char *sections,
 453                 ConfigItemLookup lookup,
 454                 const void *table,
 455                 ConfigParseFlags flags,
 456                 void *userdata) {
 457
 458         _cleanup_strv_free_ char **files = NULL;
 459         int r;
 460
 461         r = conf_files_list_nulstr(&files, ".conf", NULL, 0, conf_file_dirs);
 462         if (r < 0)
 463                 return r;
 464
 465         return config_parse_many_files(conf_file, files, sections, lookup, table, flags, userdata);
 466 }
 467
 468 /* Parse each config file in the directories specified as strv. */
 469 int config_parse_many(
 470                 const char *conf_file,
 471                 const char* const* conf_file_dirs,
 472                 const char *dropin_dirname,
 473                 const char *sections,
 474                 ConfigItemLookup lookup,
 475                 const void *table,
 476                 ConfigParseFlags flags,
 477                 void *userdata) {
 478
 479         _cleanup_strv_free_ char **dropin_dirs = NULL;
 480         _cleanup_strv_free_ char **files = NULL;
 481         const char *suffix;
 482         int r;
 483
 484         suffix = strjoina("/", dropin_dirname);
 485         r = strv_extend_strv_concat(&dropin_dirs, (char**) conf_file_dirs, suffix);
 486         if (r < 0)
 487                 return r;
 488
 489         r = conf_files_list_strv(&files, ".conf", NULL, 0, (const char* const*) dropin_dirs);
 490         if (r < 0)
 491                 return r;
 492
 493         return config_parse_many_files(conf_file, files, sections, lookup, table, flags, userdata);
 494 }
 495
 496 #define DEFINE_PARSER(type, vartype, conv_func)                         \
 497         DEFINE_CONFIG_PARSE_PTR(config_parse_##type, conv_func, vartype, "Failed to parse " #type " value")
 498
 499 DEFINE_PARSER(int, int, safe_atoi);
 500 DEFINE_PARSER(long, long, safe_atoli);
 501 DEFINE_PARSER(uint8, uint8_t, safe_atou8);
 502 DEFINE_PARSER(uint16, uint16_t, safe_atou16);
 503 DEFINE_PARSER(uint32, uint32_t, safe_atou32);
 504 DEFINE_PARSER(uint64, uint64_t, safe_atou64);
 505 DEFINE_PARSER(unsigned, unsigned, safe_atou);
 506 DEFINE_PARSER(double, double, safe_atod);
 507 DEFINE_PARSER(nsec, nsec_t, parse_nsec);
 508 DEFINE_PARSER(sec, usec_t, parse_sec);
 509 DEFINE_PARSER(mode, mode_t, parse_mode);
 510
 511 int config_parse_iec_size(const char* unit,
 512                             const char *filename,
 513                             unsigned line,
 514                             const char *section,
 515                             unsigned section_line,
 516                             const char *lvalue,
 517                             int ltype,
 518                             const char *rvalue,
 519                             void *data,
 520                             void *userdata) {
 521
 522         size_t *sz = data;
 523         uint64_t v;
 524         int r;
 525
 526         assert(filename);
 527         assert(lvalue);
 528         assert(rvalue);
 529         assert(data);
 530
 531         r = parse_size(rvalue, 1024, &v);
 532         if (r >= 0 && (uint64_t) (size_t) v != v)
 533                 r = -ERANGE;
 534         if (r < 0) {
 535                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value '%s', ignoring: %m", rvalue);
 536                 return 0;
 537         }
 538
 539         *sz = (size_t) v;
 540         return 0;
 541 }
 542
 543 int config_parse_si_size(
 544                 const char* unit,
 545                 const char *filename,
 546                 unsigned line,
 547                 const char *section,
 548                 unsigned section_line,
 549                 const char *lvalue,
 550                 int ltype,
 551                 const char *rvalue,
 552                 void *data,
 553                 void *userdata) {
 554
 555         size_t *sz = data;
 556         uint64_t v;
 557         int r;
 558
 559         assert(filename);
 560         assert(lvalue);
 561         assert(rvalue);
 562         assert(data);
 563
 564         r = parse_size(rvalue, 1000, &v);
 565         if (r >= 0 && (uint64_t) (size_t) v != v)
 566                 r = -ERANGE;
 567         if (r < 0) {
 568                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value '%s', ignoring: %m", rvalue);
 569                 return 0;
 570         }
 571
 572         *sz = (size_t) v;
 573         return 0;
 574 }
 575
 576 int config_parse_iec_uint64(
 577                 const char* unit,
 578                 const char *filename,
 579                 unsigned line,
 580                 const char *section,
 581                 unsigned section_line,
 582                 const char *lvalue,
 583                 int ltype,
 584                 const char *rvalue,
 585                 void *data,
 586                 void *userdata) {
 587
 588         uint64_t *bytes = data;
 589         int r;
 590
 591         assert(filename);
 592         assert(lvalue);
 593         assert(rvalue);
 594         assert(data);
 595
 596         r = parse_size(rvalue, 1024, bytes);
 597         if (r < 0)
 598                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 599
 600         return 0;
 601 }
 602
 603 int config_parse_bool(const char* unit,
 604                       const char *filename,
 605                       unsigned line,
 606                       const char *section,
 607                       unsigned section_line,
 608                       const char *lvalue,
 609                       int ltype,
 610                       const char *rvalue,
 611                       void *data,
 612                       void *userdata) {
 613
 614         int k;
 615         bool *b = data;
 616         bool fatal = ltype;
 617
 618         assert(filename);
 619         assert(lvalue);
 620         assert(rvalue);
 621         assert(data);
 622
 623         k = parse_boolean(rvalue);
 624         if (k < 0) {
 625                 log_syntax(unit, LOG_ERR, filename, line, k,
 626                            "Failed to parse boolean value%s: %s",
 627                            fatal ? "" : ", ignoring", rvalue);
 628                 return fatal ? -ENOEXEC : 0;
 629         }
 630
 631         *b = k;
 632         return 0;
 633 }
 634
 635 int config_parse_tristate(
 636                 const char* unit,
 637                 const char *filename,
 638                 unsigned line,
 639                 const char *section,
 640                 unsigned section_line,
 641                 const char *lvalue,
 642                 int ltype,
 643                 const char *rvalue,
 644                 void *data,
 645                 void *userdata) {
 646
 647         int k, *t = data;
 648
 649         assert(filename);
 650         assert(lvalue);
 651         assert(rvalue);
 652         assert(data);
 653
 654         /* A tristate is pretty much a boolean, except that it can
 655          * also take the special value -1, indicating "uninitialized",
 656          * much like NULL is for a pointer type. */
 657
 658         k = parse_boolean(rvalue);
 659         if (k < 0) {
 660                 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
 661                 return 0;
 662         }
 663
 664         *t = !!k;
 665         return 0;
 666 }
 667
 668 int config_parse_string(
 669                 const char *unit,
 670                 const char *filename,
 671                 unsigned line,
 672                 const char *section,
 673                 unsigned section_line,
 674                 const char *lvalue,
 675                 int ltype,
 676                 const char *rvalue,
 677                 void *data,
 678                 void *userdata) {
 679
 680         char **s = data;
 681
 682         assert(filename);
 683         assert(lvalue);
 684         assert(rvalue);
 685         assert(data);
 686
 687         if (free_and_strdup(s, empty_to_null(rvalue)) < 0)
 688                 return log_oom();
 689
 690         return 0;
 691 }
 692
 693 int config_parse_path(
 694                 const char *unit,
 695                 const char *filename,
 696                 unsigned line,
 697                 const char *section,
 698                 unsigned section_line,
 699                 const char *lvalue,
 700                 int ltype,
 701                 const char *rvalue,
 702                 void *data,
 703                 void *userdata) {
 704
 705         _cleanup_free_ char *n = NULL;
 706         bool fatal = ltype;
 707         char **s = data;
 708         int r;
 709
 710         assert(filename);
 711         assert(lvalue);
 712         assert(rvalue);
 713         assert(data);
 714
 715         if (isempty(rvalue))
 716                 goto finalize;
 717
 718         n = strdup(rvalue);
 719         if (!n)
 720                 return log_oom();
 721
 722         r = path_simplify_and_warn(n, PATH_CHECK_ABSOLUTE | (fatal ? PATH_CHECK_FATAL : 0), unit, filename, line, lvalue);
 723         if (r < 0)
 724                 return fatal ? -ENOEXEC : 0;
 725
 726 finalize:
 727         return free_and_replace(*s, n);
 728 }
 729
 730 int config_parse_strv(
 731                 const char *unit,
 732                 const char *filename,
 733                 unsigned line,
 734                 const char *section,
 735                 unsigned section_line,
 736                 const char *lvalue,
 737                 int ltype,
 738                 const char *rvalue,
 739                 void *data,
 740                 void *userdata) {
 741
 742         char ***sv = data;
 743         int r;
 744
 745         assert(filename);
 746         assert(lvalue);
 747         assert(rvalue);
 748         assert(data);
 749
 750         if (isempty(rvalue)) {
 751                 *sv = strv_free(*sv);
 752                 return 0;
 753         }
 754
 755         for (;;) {
 756                 char *word = NULL;
 757
 758                 r = extract_first_word(&rvalue, &word, NULL, EXTRACT_QUOTES|EXTRACT_RETAIN_ESCAPE);
 759                 if (r == 0)
 760                         break;
 761                 if (r == -ENOMEM)
 762                         return log_oom();
 763                 if (r < 0) {
 764                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
 765                         break;
 766                 }
 767
 768                 r = strv_consume(sv, word);
 769                 if (r < 0)
 770                         return log_oom();
 771         }
 772
 773         return 0;
 774 }
 775
 776 int config_parse_warn_compat(
 777                 const char *unit,
 778                 const char *filename,
 779                 unsigned line,
 780                 const char *section,
 781                 unsigned section_line,
 782                 const char *lvalue,
 783                 int ltype,
 784                 const char *rvalue,
 785                 void *data,
 786                 void *userdata) {
 787
 788         Disabled reason = ltype;
 789
 790         switch(reason) {
 791
 792         case DISABLED_CONFIGURATION:
 793                 log_syntax(unit, LOG_DEBUG, filename, line, 0,
 794                            "Support for option %s= has been disabled at compile time and it is ignored", lvalue);
 795                 break;
 796
 797         case DISABLED_LEGACY:
 798                 log_syntax(unit, LOG_INFO, filename, line, 0,
 799                            "Support for option %s= has been removed and it is ignored", lvalue);
 800                 break;
 801
 802         case DISABLED_EXPERIMENTAL:
 803                 log_syntax(unit, LOG_INFO, filename, line, 0,
 804                            "Support for option %s= has not yet been enabled and it is ignored", lvalue);
 805                 break;
 806         }
 807
 808         return 0;
 809 }
 810
 811 int config_parse_log_facility(
 812                 const char *unit,
 813                 const char *filename,
 814                 unsigned line,
 815                 const char *section,
 816                 unsigned section_line,
 817                 const char *lvalue,
 818                 int ltype,
 819                 const char *rvalue,
 820                 void *data,
 821                 void *userdata) {
 822
 823         int *o = data, x;
 824
 825         assert(filename);
 826         assert(lvalue);
 827         assert(rvalue);
 828         assert(data);
 829
 830         x = log_facility_unshifted_from_string(rvalue);
 831         if (x < 0) {
 832                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log facility, ignoring: %s", rvalue);
 833                 return 0;
 834         }
 835
 836         *o = (x << 3) | LOG_PRI(*o);
 837
 838         return 0;
 839 }
 840
 841 int config_parse_log_level(
 842                 const char *unit,
 843                 const char *filename,
 844                 unsigned line,
 845                 const char *section,
 846                 unsigned section_line,
 847                 const char *lvalue,
 848                 int ltype,
 849                 const char *rvalue,
 850                 void *data,
 851                 void *userdata) {
 852
 853         int *o = data, x;
 854
 855         assert(filename);
 856         assert(lvalue);
 857         assert(rvalue);
 858         assert(data);
 859
 860         x = log_level_from_string(rvalue);
 861         if (x < 0) {
 862                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log level, ignoring: %s", rvalue);
 863                 return 0;
 864         }
 865
 866         if (*o < 0) /* if it wasn't initialized so far, assume zero facility */
 867                 *o = x;
 868         else
 869                 *o = (*o & LOG_FACMASK) | x;
 870
 871         return 0;
 872 }
 873
 874 int config_parse_signal(
 875                 const char *unit,
 876                 const char *filename,
 877                 unsigned line,
 878                 const char *section,
 879                 unsigned section_line,
 880                 const char *lvalue,
 881                 int ltype,
 882                 const char *rvalue,
 883                 void *data,
 884                 void *userdata) {
 885
 886         int *sig = data, r;
 887
 888         assert(filename);
 889         assert(lvalue);
 890         assert(rvalue);
 891         assert(sig);
 892
 893         r = signal_from_string(rvalue);
 894         if (r <= 0) {
 895                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse signal name, ignoring: %s", rvalue);
 896                 return 0;
 897         }
 898
 899         *sig = r;
 900         return 0;
 901 }
 902
 903 int config_parse_personality(
 904                 const char *unit,
 905                 const char *filename,
 906                 unsigned line,
 907                 const char *section,
 908                 unsigned section_line,
 909                 const char *lvalue,
 910                 int ltype,
 911                 const char *rvalue,
 912                 void *data,
 913                 void *userdata) {
 914
 915         unsigned long *personality = data, p;
 916
 917         assert(filename);
 918         assert(lvalue);
 919         assert(rvalue);
 920         assert(personality);
 921
 922         if (isempty(rvalue))
 923                 p = PERSONALITY_INVALID;
 924         else {
 925                 p = personality_from_string(rvalue);
 926                 if (p == PERSONALITY_INVALID) {
 927                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse personality, ignoring: %s", rvalue);
 928                         return 0;
 929                 }
 930         }
 931
 932         *personality = p;
 933         return 0;
 934 }
 935
 936 int config_parse_ifname(
 937                 const char *unit,
 938                 const char *filename,
 939                 unsigned line,
 940                 const char *section,
 941                 unsigned section_line,
 942                 const char *lvalue,
 943                 int ltype,
 944                 const char *rvalue,
 945                 void *data,
 946                 void *userdata) {
 947
 948         char **s = data;
 949         int r;
 950
 951         assert(filename);
 952         assert(lvalue);
 953         assert(rvalue);
 954         assert(data);
 955
 956         if (isempty(rvalue)) {
 957                 *s = mfree(*s);
 958                 return 0;
 959         }
 960
 961         if (!ifname_valid(rvalue)) {
 962                 log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue);
 963                 return 0;
 964         }
 965
 966         r = free_and_strdup(s, rvalue);
 967         if (r < 0)
 968                 return log_oom();
 969
 970         return 0;
 971 }
 972
 973 int config_parse_ip_port(
 974                 const char *unit,
 975                 const char *filename,
 976                 unsigned line,
 977                 const char *section,
 978                 unsigned section_line,
 979                 const char *lvalue,
 980                 int ltype,
 981                 const char *rvalue,
 982                 void *data,
 983                 void *userdata) {
 984
 985         uint16_t *s = data;
 986         uint16_t port;
 987         int r;
 988
 989         assert(filename);
 990         assert(lvalue);
 991         assert(rvalue);
 992         assert(data);
 993
 994         if (isempty(rvalue)) {
 995                 *s = 0;
 996                 return 0;
 997         }
 998
 999         r = parse_ip_port(rvalue, &port);
1000         if (r < 0) {
1001                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse port '%s'.", rvalue);
1002                 return 0;
1003         }
1004
1005         *s = port;
1006
1007         return 0;
1008 }
1009
1010 int config_parse_mtu(
1011                 const char *unit,
1012                 const char *filename,
1013                 unsigned line,
1014                 const char *section,
1015                 unsigned section_line,
1016                 const char *lvalue,
1017                 int ltype,
1018                 const char *rvalue,
1019                 void *data,
1020                 void *userdata) {
1021
1022         uint32_t *mtu = data;
1023         int r;
1024
1025         assert(rvalue);
1026         assert(mtu);
1027
1028         r = parse_mtu(ltype, rvalue, mtu);
1029         if (r == -ERANGE) {
1030                 log_syntax(unit, LOG_ERR, filename, line, r,
1031                            "Maximum transfer unit (MTU) value out of range. Permitted range is %" PRIu32 "…%" PRIu32 ", ignoring: %s",
1032                            (uint32_t) (ltype == AF_INET6 ? IPV6_MIN_MTU : IPV4_MIN_MTU), (uint32_t) UINT32_MAX,
1033                            rvalue);
1034                 return 0;
1035         }
1036         if (r < 0) {
1037                 log_syntax(unit, LOG_ERR, filename, line, r,
1038                            "Failed to parse MTU value '%s', ignoring: %m", rvalue);
1039                 return 0;
1040         }
1041
1042         return 0;
1043 }
1044
1045 int config_parse_rlimit(
1046                 const char *unit,
1047                 const char *filename,
1048                 unsigned line,
1049                 const char *section,
1050                 unsigned section_line,
1051                 const char *lvalue,
1052                 int ltype,
1053                 const char *rvalue,
1054                 void *data,
1055                 void *userdata) {
1056
1057         struct rlimit **rl = data, d = {};
1058         int r;
1059
1060         assert(rvalue);
1061         assert(rl);
1062
1063         r = rlimit_parse(ltype, rvalue, &d);
1064         if (r == -EILSEQ) {
1065                 log_syntax(unit, LOG_WARNING, filename, line, r, "Soft resource limit chosen higher than hard limit, ignoring: %s", rvalue);
1066                 return 0;
1067         }
1068         if (r < 0) {
1069                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse resource value, ignoring: %s", rvalue);
1070                 return 0;
1071         }
1072
1073         if (rl[ltype])
1074                 *rl[ltype] = d;
1075         else {
1076                 rl[ltype] = newdup(struct rlimit, &d, 1);
1077                 if (!rl[ltype])
1078                         return log_oom();
1079         }
1080
1081         return 0;
1082 }
1083
1084 int config_parse_permille(const char* unit,
1085                           const char *filename,
1086                           unsigned line,
1087                           const char *section,
1088                           unsigned section_line,
1089                           const char *lvalue,
1090                           int ltype,
1091                           const char *rvalue,
1092                           void *data,
1093                           void *userdata) {
1094
1095         unsigned *permille = data;
1096         int r;
1097
1098         assert(filename);
1099         assert(lvalue);
1100         assert(rvalue);
1101         assert(permille);
1102
1103         r = parse_permille(rvalue);
1104         if (r < 0) {
1105                 log_syntax(unit, LOG_ERR, filename, line, r,
1106                            "Failed to parse permille value, ignoring: %s", rvalue);
1107                 return 0;
1108         }
1109
1110         *permille = (unsigned) r;
1111
1112         return 0;
1113 }