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 <sys/types.h>
   9
  10 #include "alloc-util.h"
  11 #include "conf-files.h"
  12 #include "conf-parser.h"
  13 #include "def.h"
  14 #include "extract-word.h"
  15 #include "fd-util.h"
  16 #include "fileio.h"
  17 #include "fs-util.h"
  18 #include "log.h"
  19 #include "macro.h"
  20 #include "missing_network.h"
  21 #include "nulstr-util.h"
  22 #include "parse-util.h"
  23 #include "path-util.h"
  24 #include "process-util.h"
  25 #include "rlimit-util.h"
  26 #include "sd-id128.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
  35 int config_item_table_lookup(
  36                 const void *table,
  37                 const char *section,
  38                 const char *lvalue,
  39                 ConfigParserCallback *func,
  40                 int *ltype,
  41                 void **data,
  42                 void *userdata) {
  43
  44         const ConfigTableItem *t;
  45
  46         assert(table);
  47         assert(lvalue);
  48         assert(func);
  49         assert(ltype);
  50         assert(data);
  51
  52         for (t = table; t->lvalue; t++) {
  53
  54                 if (!streq(lvalue, t->lvalue))
  55                         continue;
  56
  57                 if (!streq_ptr(section, t->section))
  58                         continue;
  59
  60                 *func = t->parse;
  61                 *ltype = t->ltype;
  62                 *data = t->data;
  63                 return 1;
  64         }
  65
  66         return 0;
  67 }
  68
  69 int config_item_perf_lookup(
  70                 const void *table,
  71                 const char *section,
  72                 const char *lvalue,
  73                 ConfigParserCallback *func,
  74                 int *ltype,
  75                 void **data,
  76                 void *userdata) {
  77
  78         ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
  79         const ConfigPerfItem *p;
  80
  81         assert(table);
  82         assert(lvalue);
  83         assert(func);
  84         assert(ltype);
  85         assert(data);
  86
  87         if (section) {
  88                 const char *key;
  89
  90                 key = strjoina(section, ".", lvalue);
  91                 p = lookup(key, strlen(key));
  92         } else
  93                 p = lookup(lvalue, strlen(lvalue));
  94         if (!p)
  95                 return 0;
  96
  97         *func = p->parse;
  98         *ltype = p->ltype;
  99         *data = (uint8_t*) userdata + p->offset;
 100         return 1;
 101 }
 102
 103 /* Run the user supplied parser for an assignment */
 104 static int next_assignment(
 105                 const char *unit,
 106                 const char *filename,
 107                 unsigned line,
 108                 ConfigItemLookup lookup,
 109                 const void *table,
 110                 const char *section,
 111                 unsigned section_line,
 112                 const char *lvalue,
 113                 const char *rvalue,
 114                 ConfigParseFlags flags,
 115                 void *userdata) {
 116
 117         ConfigParserCallback func = NULL;
 118         int ltype = 0;
 119         void *data = NULL;
 120         int r;
 121
 122         assert(filename);
 123         assert(line > 0);
 124         assert(lookup);
 125         assert(lvalue);
 126         assert(rvalue);
 127
 128         r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
 129         if (r < 0)
 130                 return r;
 131         if (r > 0) {
 132                 if (func)
 133                         return func(unit, filename, line, section, section_line,
 134                                     lvalue, ltype, rvalue, data, userdata);
 135
 136                 return 0;
 137         }
 138
 139         /* Warn about unknown non-extension fields. */
 140         if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(lvalue, "X-"))
 141                 log_syntax(unit, LOG_WARNING, filename, line, 0,
 142                            "Unknown key name '%s' in section '%s', ignoring.", lvalue, section);
 143
 144         return 0;
 145 }
 146
 147 /* Parse a single logical line */
 148 static int parse_line(
 149                 const char* unit,
 150                 const char *filename,
 151                 unsigned line,
 152                 const char *sections,
 153                 ConfigItemLookup lookup,
 154                 const void *table,
 155                 ConfigParseFlags flags,
 156                 char **section,
 157                 unsigned *section_line,
 158                 bool *section_ignored,
 159                 char *l,
 160                 void *userdata) {
 161
 162         char *e;
 163
 164         assert(filename);
 165         assert(line > 0);
 166         assert(lookup);
 167         assert(l);
 168
 169         l = strstrip(l);
 170         if (!*l)
 171                 return 0;
 172
 173         if (*l == '\n')
 174                 return 0;
 175
 176         if (!utf8_is_valid(l))
 177                 return log_syntax_invalid_utf8(unit, LOG_WARNING, filename, line, l);
 178
 179         if (*l == '[') {
 180                 size_t k;
 181                 char *n;
 182
 183                 k = strlen(l);
 184                 assert(k > 0);
 185
 186                 if (l[k-1] != ']')
 187                         return log_syntax(unit, LOG_ERR, filename, line, SYNTHETIC_ERRNO(EBADMSG), "Invalid section header '%s'", l);
 188
 189                 n = strndup(l+1, k-2);
 190                 if (!n)
 191                         return log_oom();
 192
 193                 if (sections && !nulstr_contains(sections, n)) {
 194                         bool ignore = flags & CONFIG_PARSE_RELAXED;
 195                         const char *t;
 196
 197                         ignore = ignore || startswith(n, "X-");
 198
 199                         if (!ignore)
 200                                 NULSTR_FOREACH(t, sections)
 201                                         if (streq_ptr(n, startswith(t, "-"))) {
 202                                                 ignore = true;
 203                                                 break;
 204                                         }
 205
 206                         if (!ignore)
 207                                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown section '%s'. Ignoring.", n);
 208
 209                         free(n);
 210                         *section = mfree(*section);
 211                         *section_line = 0;
 212                         *section_ignored = true;
 213                 } else {
 214                         free_and_replace(*section, n);
 215                         *section_line = line;
 216                         *section_ignored = false;
 217                 }
 218
 219                 return 0;
 220         }
 221
 222         if (sections && !*section) {
 223                 if (!(flags & CONFIG_PARSE_RELAXED) && !*section_ignored)
 224                         log_syntax(unit, LOG_WARNING, filename, line, 0, "Assignment outside of section. Ignoring.");
 225
 226                 return 0;
 227         }
 228
 229         e = strchr(l, '=');
 230         if (!e)
 231                 return log_syntax(unit, LOG_WARNING, filename, line, 0,
 232                                   "Missing '=', ignoring line.");
 233         if (e == l)
 234                 return log_syntax(unit, LOG_WARNING, filename, line, 0,
 235                                   "Missing key name before '=', ignoring line.");
 236
 237         *e = 0;
 238         e++;
 239
 240         return next_assignment(unit,
 241                                filename,
 242                                line,
 243                                lookup,
 244                                table,
 245                                *section,
 246                                *section_line,
 247                                strstrip(l),
 248                                strstrip(e),
 249                                flags,
 250                                userdata);
 251 }
 252
 253 /* Go through the file and parse each line */
 254 int config_parse(const char *unit,
 255                  const char *filename,
 256                  FILE *f,
 257                  const char *sections,
 258                  ConfigItemLookup lookup,
 259                  const void *table,
 260                  ConfigParseFlags flags,
 261                  void *userdata,
 262                  usec_t *ret_mtime) {
 263
 264         _cleanup_free_ char *section = NULL, *continuation = NULL;
 265         _cleanup_fclose_ FILE *ours = NULL;
 266         unsigned line = 0, section_line = 0;
 267         bool section_ignored = false, bom_seen = false;
 268         int r, fd;
 269         usec_t mtime;
 270
 271         assert(filename);
 272         assert(lookup);
 273
 274         if (!f) {
 275                 f = ours = fopen(filename, "re");
 276                 if (!f) {
 277                         /* Only log on request, except for ENOENT,
 278                          * since we return 0 to the caller. */
 279                         if ((flags & CONFIG_PARSE_WARN) || errno == ENOENT)
 280                                 log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_ERR, errno,
 281                                                "Failed to open configuration file '%s': %m", filename);
 282                         return errno == ENOENT ? 0 : -errno;
 283                 }
 284         }
 285
 286         fd = fileno(f);
 287         if (fd >= 0) { /* stream might not have an fd, let's be careful hence */
 288                 struct stat st;
 289
 290                 if (fstat(fd, &st) < 0)
 291                         return log_full_errno(FLAGS_SET(flags, CONFIG_PARSE_WARN) ? LOG_ERR : LOG_DEBUG, errno,
 292                                               "Failed to fstat(%s): %m", filename);
 293
 294                 (void) stat_warn_permissions(filename, &st);
 295                 mtime = timespec_load(&st.st_mtim);
 296         }
 297
 298         for (;;) {
 299                 _cleanup_free_ char *buf = NULL;
 300                 bool escaped = false;
 301                 char *l, *p, *e;
 302
 303                 r = read_line(f, LONG_LINE_MAX, &buf);
 304                 if (r == 0)
 305                         break;
 306                 if (r == -ENOBUFS) {
 307                         if (flags & CONFIG_PARSE_WARN)
 308                                 log_error_errno(r, "%s:%u: Line too long", filename, line);
 309
 310                         return r;
 311                 }
 312                 if (r < 0) {
 313                         if (FLAGS_SET(flags, CONFIG_PARSE_WARN))
 314                                 log_error_errno(r, "%s:%u: Error while reading configuration file: %m", filename, line);
 315
 316                         return r;
 317                 }
 318
 319                 line++;
 320
 321                 l = skip_leading_chars(buf, WHITESPACE);
 322                 if (*l != '\0' && strchr(COMMENTS, *l))
 323                         continue;
 324
 325                 l = buf;
 326                 if (!bom_seen) {
 327                         char *q;
 328
 329                         q = startswith(buf, UTF8_BYTE_ORDER_MARK);
 330                         if (q) {
 331                                 l = q;
 332                                 bom_seen = true;
 333                         }
 334                 }
 335
 336                 if (continuation) {
 337                         if (strlen(continuation) + strlen(l) > LONG_LINE_MAX) {
 338                                 if (flags & CONFIG_PARSE_WARN)
 339                                         log_error("%s:%u: Continuation line too long", filename, line);
 340                                 return -ENOBUFS;
 341                         }
 342
 343                         if (!strextend(&continuation, l, NULL)) {
 344                                 if (flags & CONFIG_PARSE_WARN)
 345                                         log_oom();
 346                                 return -ENOMEM;
 347                         }
 348
 349                         p = continuation;
 350                 } else
 351                         p = l;
 352
 353                 for (e = p; *e; e++) {
 354                         if (escaped)
 355                                 escaped = false;
 356                         else if (*e == '\\')
 357                                 escaped = true;
 358                 }
 359
 360                 if (escaped) {
 361                         *(e-1) = ' ';
 362
 363                         if (!continuation) {
 364                                 continuation = strdup(l);
 365                                 if (!continuation) {
 366                                         if (flags & CONFIG_PARSE_WARN)
 367                                                 log_oom();
 368                                         return -ENOMEM;
 369                                 }
 370                         }
 371
 372                         continue;
 373                 }
 374
 375                 r = parse_line(unit,
 376                                filename,
 377                                line,
 378                                sections,
 379                                lookup,
 380                                table,
 381                                flags,
 382                                &section,
 383                                &section_line,
 384                                &section_ignored,
 385                                p,
 386                                userdata);
 387                 if (r < 0) {
 388                         if (flags & CONFIG_PARSE_WARN)
 389                                 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
 390                         return r;
 391                 }
 392
 393                 continuation = mfree(continuation);
 394         }
 395
 396         if (continuation) {
 397                 r = parse_line(unit,
 398                                filename,
 399                                ++line,
 400                                sections,
 401                                lookup,
 402                                table,
 403                                flags,
 404                                &section,
 405                                &section_line,
 406                                &section_ignored,
 407                                continuation,
 408                                userdata);
 409                 if (r < 0) {
 410                         if (flags & CONFIG_PARSE_WARN)
 411                                 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
 412                         return r;
 413                 }
 414         }
 415
 416         if (ret_mtime)
 417                 *ret_mtime = mtime;
 418
 419         return 0;
 420 }
 421
 422 static int config_parse_many_files(
 423                 const char *conf_file,
 424                 char **files,
 425                 const char *sections,
 426                 ConfigItemLookup lookup,
 427                 const void *table,
 428                 ConfigParseFlags flags,
 429                 void *userdata,
 430                 usec_t *ret_mtime) {
 431
 432         usec_t mtime = 0;
 433         char **fn;
 434         int r;
 435
 436         if (conf_file) {
 437                 r = config_parse(NULL, conf_file, NULL, sections, lookup, table, flags, userdata, &mtime);
 438                 if (r < 0)
 439                         return r;
 440         }
 441
 442         STRV_FOREACH(fn, files) {
 443                 usec_t t;
 444
 445                 r = config_parse(NULL, *fn, NULL, sections, lookup, table, flags, userdata, &t);
 446                 if (r < 0)
 447                         return r;
 448                 if (t > mtime) /* Find the newest */
 449                         mtime = t;
 450         }
 451
 452         if (ret_mtime)
 453                 *ret_mtime = mtime;
 454
 455         return 0;
 456 }
 457
 458 /* Parse each config file in the directories specified as nulstr. */
 459 int config_parse_many_nulstr(
 460                 const char *conf_file,
 461                 const char *conf_file_dirs,
 462                 const char *sections,
 463                 ConfigItemLookup lookup,
 464                 const void *table,
 465                 ConfigParseFlags flags,
 466                 void *userdata,
 467                 usec_t *ret_mtime) {
 468
 469         _cleanup_strv_free_ char **files = NULL;
 470         int r;
 471
 472         r = conf_files_list_nulstr(&files, ".conf", NULL, 0, conf_file_dirs);
 473         if (r < 0)
 474                 return r;
 475
 476         return config_parse_many_files(conf_file, files, sections, lookup, table, flags, userdata, ret_mtime);
 477 }
 478
 479 /* Parse each config file in the directories specified as strv. */
 480 int config_parse_many(
 481                 const char *conf_file,
 482                 const char* const* conf_file_dirs,
 483                 const char *dropin_dirname,
 484                 const char *sections,
 485                 ConfigItemLookup lookup,
 486                 const void *table,
 487                 ConfigParseFlags flags,
 488                 void *userdata,
 489                 usec_t *ret_mtime) {
 490
 491         _cleanup_strv_free_ char **dropin_dirs = NULL;
 492         _cleanup_strv_free_ char **files = NULL;
 493         const char *suffix;
 494         int r;
 495
 496         suffix = strjoina("/", dropin_dirname);
 497         r = strv_extend_strv_concat(&dropin_dirs, (char**) conf_file_dirs, suffix);
 498         if (r < 0)
 499                 return r;
 500
 501         r = conf_files_list_strv(&files, ".conf", NULL, 0, (const char* const*) dropin_dirs);
 502         if (r < 0)
 503                 return r;
 504
 505         return config_parse_many_files(conf_file, files, sections, lookup, table, flags, userdata, ret_mtime);
 506 }
 507
 508 #define DEFINE_PARSER(type, vartype, conv_func)                         \
 509         DEFINE_CONFIG_PARSE_PTR(config_parse_##type, conv_func, vartype, "Failed to parse " #type " value")
 510
 511 DEFINE_PARSER(int, int, safe_atoi);
 512 DEFINE_PARSER(long, long, safe_atoli);
 513 DEFINE_PARSER(uint8, uint8_t, safe_atou8);
 514 DEFINE_PARSER(uint16, uint16_t, safe_atou16);
 515 DEFINE_PARSER(uint32, uint32_t, safe_atou32);
 516 DEFINE_PARSER(int32, int32_t, safe_atoi32);
 517 DEFINE_PARSER(uint64, uint64_t, safe_atou64);
 518 DEFINE_PARSER(unsigned, unsigned, safe_atou);
 519 DEFINE_PARSER(double, double, safe_atod);
 520 DEFINE_PARSER(nsec, nsec_t, parse_nsec);
 521 DEFINE_PARSER(sec, usec_t, parse_sec);
 522 DEFINE_PARSER(sec_def_infinity, usec_t, parse_sec_def_infinity);
 523 DEFINE_PARSER(mode, mode_t, parse_mode);
 524
 525 int config_parse_iec_size(const char* unit,
 526                             const char *filename,
 527                             unsigned line,
 528                             const char *section,
 529                             unsigned section_line,
 530                             const char *lvalue,
 531                             int ltype,
 532                             const char *rvalue,
 533                             void *data,
 534                             void *userdata) {
 535
 536         size_t *sz = data;
 537         uint64_t v;
 538         int r;
 539
 540         assert(filename);
 541         assert(lvalue);
 542         assert(rvalue);
 543         assert(data);
 544
 545         r = parse_size(rvalue, 1024, &v);
 546         if (r >= 0 && (uint64_t) (size_t) v != v)
 547                 r = -ERANGE;
 548         if (r < 0) {
 549                 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse size value '%s', ignoring: %m", rvalue);
 550                 return 0;
 551         }
 552
 553         *sz = (size_t) v;
 554         return 0;
 555 }
 556
 557 int config_parse_si_uint64(
 558                 const char* unit,
 559                 const char *filename,
 560                 unsigned line,
 561                 const char *section,
 562                 unsigned section_line,
 563                 const char *lvalue,
 564                 int ltype,
 565                 const char *rvalue,
 566                 void *data,
 567                 void *userdata) {
 568
 569         uint64_t *sz = data;
 570         int r;
 571
 572         assert(filename);
 573         assert(lvalue);
 574         assert(rvalue);
 575         assert(data);
 576
 577         r = parse_size(rvalue, 1000, sz);
 578         if (r < 0)
 579                 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse size value '%s', ignoring: %m", rvalue);
 580
 581         return 0;
 582 }
 583
 584 int config_parse_iec_uint64(
 585                 const char* unit,
 586                 const char *filename,
 587                 unsigned line,
 588                 const char *section,
 589                 unsigned section_line,
 590                 const char *lvalue,
 591                 int ltype,
 592                 const char *rvalue,
 593                 void *data,
 594                 void *userdata) {
 595
 596         uint64_t *bytes = data;
 597         int r;
 598
 599         assert(filename);
 600         assert(lvalue);
 601         assert(rvalue);
 602         assert(data);
 603
 604         r = parse_size(rvalue, 1024, bytes);
 605         if (r < 0)
 606                 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 607
 608         return 0;
 609 }
 610
 611 int config_parse_bool(const char* unit,
 612                       const char *filename,
 613                       unsigned line,
 614                       const char *section,
 615                       unsigned section_line,
 616                       const char *lvalue,
 617                       int ltype,
 618                       const char *rvalue,
 619                       void *data,
 620                       void *userdata) {
 621
 622         int k;
 623         bool *b = data;
 624         bool fatal = ltype;
 625
 626         assert(filename);
 627         assert(lvalue);
 628         assert(rvalue);
 629         assert(data);
 630
 631         k = parse_boolean(rvalue);
 632         if (k < 0) {
 633                 log_syntax(unit, fatal ? LOG_ERR : LOG_WARNING, filename, line, k,
 634                            "Failed to parse boolean value%s: %s",
 635                            fatal ? "" : ", ignoring", rvalue);
 636                 return fatal ? -ENOEXEC : 0;
 637         }
 638
 639         *b = k;
 640         return 0;
 641 }
 642
 643 int config_parse_id128(
 644                 const char *unit,
 645                 const char *filename,
 646                 unsigned line,
 647                 const char *section,
 648                 unsigned section_line,
 649                 const char *lvalue,
 650                 int ltype,
 651                 const char *rvalue,
 652                 void *data,
 653                 void *userdata) {
 654
 655         sd_id128_t t, *result = data;
 656         int r;
 657
 658         assert(filename);
 659         assert(lvalue);
 660         assert(rvalue);
 661
 662         r = sd_id128_from_string(rvalue, &t);
 663         if (r < 0) {
 664                 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse 128bit ID/UUID, ignoring: %s", rvalue);
 665                 return 0;
 666         }
 667
 668         if (sd_id128_is_null(t)) {
 669                 log_syntax(unit, LOG_WARNING, filename, line, 0, "128bit ID/UUID is all 0, ignoring: %s", rvalue);
 670                 return 0;
 671         }
 672
 673         *result = t;
 674         return 0;
 675 }
 676
 677 int config_parse_tristate(
 678                 const char* unit,
 679                 const char *filename,
 680                 unsigned line,
 681                 const char *section,
 682                 unsigned section_line,
 683                 const char *lvalue,
 684                 int ltype,
 685                 const char *rvalue,
 686                 void *data,
 687                 void *userdata) {
 688
 689         int k, *t = data;
 690
 691         assert(filename);
 692         assert(lvalue);
 693         assert(rvalue);
 694         assert(data);
 695
 696         /* A tristate is pretty much a boolean, except that it can
 697          * also take the special value -1, indicating "uninitialized",
 698          * much like NULL is for a pointer type. */
 699
 700         k = parse_boolean(rvalue);
 701         if (k < 0) {
 702                 log_syntax(unit, LOG_WARNING, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
 703                 return 0;
 704         }
 705
 706         *t = k;
 707         return 0;
 708 }
 709
 710 int config_parse_string(
 711                 const char *unit,
 712                 const char *filename,
 713                 unsigned line,
 714                 const char *section,
 715                 unsigned section_line,
 716                 const char *lvalue,
 717                 int ltype,
 718                 const char *rvalue,
 719                 void *data,
 720                 void *userdata) {
 721
 722         char **s = data;
 723
 724         assert(filename);
 725         assert(lvalue);
 726         assert(rvalue);
 727         assert(data);
 728
 729         if (free_and_strdup(s, empty_to_null(rvalue)) < 0)
 730                 return log_oom();
 731
 732         return 0;
 733 }
 734
 735 int config_parse_path(
 736                 const char *unit,
 737                 const char *filename,
 738                 unsigned line,
 739                 const char *section,
 740                 unsigned section_line,
 741                 const char *lvalue,
 742                 int ltype,
 743                 const char *rvalue,
 744                 void *data,
 745                 void *userdata) {
 746
 747         _cleanup_free_ char *n = NULL;
 748         bool fatal = ltype;
 749         char **s = data;
 750         int r;
 751
 752         assert(filename);
 753         assert(lvalue);
 754         assert(rvalue);
 755         assert(data);
 756
 757         if (isempty(rvalue))
 758                 goto finalize;
 759
 760         n = strdup(rvalue);
 761         if (!n)
 762                 return log_oom();
 763
 764         r = path_simplify_and_warn(n, PATH_CHECK_ABSOLUTE | (fatal ? PATH_CHECK_FATAL : 0), unit, filename, line, lvalue);
 765         if (r < 0)
 766                 return fatal ? -ENOEXEC : 0;
 767
 768 finalize:
 769         return free_and_replace(*s, n);
 770 }
 771
 772 int config_parse_strv(
 773                 const char *unit,
 774                 const char *filename,
 775                 unsigned line,
 776                 const char *section,
 777                 unsigned section_line,
 778                 const char *lvalue,
 779                 int ltype,
 780                 const char *rvalue,
 781                 void *data,
 782                 void *userdata) {
 783
 784         char ***sv = data;
 785         int r;
 786
 787         assert(filename);
 788         assert(lvalue);
 789         assert(rvalue);
 790         assert(data);
 791
 792         if (isempty(rvalue)) {
 793                 *sv = strv_free(*sv);
 794                 return 0;
 795         }
 796
 797         for (const char *p = rvalue;;) {
 798                 char *word = NULL;
 799
 800                 r = extract_first_word(&p, &word, NULL, EXTRACT_UNQUOTE|EXTRACT_RETAIN_ESCAPE);
 801                 if (r == 0)
 802                         return 0;
 803                 if (r == -ENOMEM)
 804                         return log_oom();
 805                 if (r < 0) {
 806                         log_syntax(unit, LOG_WARNING, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
 807                         return 0;
 808                 }
 809
 810                 r = strv_consume(sv, word);
 811                 if (r < 0)
 812                         return log_oom();
 813         }
 814 }
 815
 816 int config_parse_warn_compat(
 817                 const char *unit,
 818                 const char *filename,
 819                 unsigned line,
 820                 const char *section,
 821                 unsigned section_line,
 822                 const char *lvalue,
 823                 int ltype,
 824                 const char *rvalue,
 825                 void *data,
 826                 void *userdata) {
 827
 828         Disabled reason = ltype;
 829
 830         switch(reason) {
 831
 832         case DISABLED_CONFIGURATION:
 833                 log_syntax(unit, LOG_DEBUG, filename, line, 0,
 834                            "Support for option %s= has been disabled at compile time and it is ignored", lvalue);
 835                 break;
 836
 837         case DISABLED_LEGACY:
 838                 log_syntax(unit, LOG_INFO, filename, line, 0,
 839                            "Support for option %s= has been removed and it is ignored", lvalue);
 840                 break;
 841
 842         case DISABLED_EXPERIMENTAL:
 843                 log_syntax(unit, LOG_INFO, filename, line, 0,
 844                            "Support for option %s= has not yet been enabled and it is ignored", lvalue);
 845                 break;
 846         }
 847
 848         return 0;
 849 }
 850
 851 int config_parse_log_facility(
 852                 const char *unit,
 853                 const char *filename,
 854                 unsigned line,
 855                 const char *section,
 856                 unsigned section_line,
 857                 const char *lvalue,
 858                 int ltype,
 859                 const char *rvalue,
 860                 void *data,
 861                 void *userdata) {
 862
 863         int *o = data, x;
 864
 865         assert(filename);
 866         assert(lvalue);
 867         assert(rvalue);
 868         assert(data);
 869
 870         x = log_facility_unshifted_from_string(rvalue);
 871         if (x < 0) {
 872                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Failed to parse log facility, ignoring: %s", rvalue);
 873                 return 0;
 874         }
 875
 876         *o = (x << 3) | LOG_PRI(*o);
 877
 878         return 0;
 879 }
 880
 881 int config_parse_log_level(
 882                 const char *unit,
 883                 const char *filename,
 884                 unsigned line,
 885                 const char *section,
 886                 unsigned section_line,
 887                 const char *lvalue,
 888                 int ltype,
 889                 const char *rvalue,
 890                 void *data,
 891                 void *userdata) {
 892
 893         int *o = data, x;
 894
 895         assert(filename);
 896         assert(lvalue);
 897         assert(rvalue);
 898         assert(data);
 899
 900         x = log_level_from_string(rvalue);
 901         if (x < 0) {
 902                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Failed to parse log level, ignoring: %s", rvalue);
 903                 return 0;
 904         }
 905
 906         if (*o < 0) /* if it wasn't initialized so far, assume zero facility */
 907                 *o = x;
 908         else
 909                 *o = (*o & LOG_FACMASK) | x;
 910
 911         return 0;
 912 }
 913
 914 int config_parse_signal(
 915                 const char *unit,
 916                 const char *filename,
 917                 unsigned line,
 918                 const char *section,
 919                 unsigned section_line,
 920                 const char *lvalue,
 921                 int ltype,
 922                 const char *rvalue,
 923                 void *data,
 924                 void *userdata) {
 925
 926         int *sig = data, r;
 927
 928         assert(filename);
 929         assert(lvalue);
 930         assert(rvalue);
 931         assert(sig);
 932
 933         r = signal_from_string(rvalue);
 934         if (r <= 0) {
 935                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Failed to parse signal name, ignoring: %s", rvalue);
 936                 return 0;
 937         }
 938
 939         *sig = r;
 940         return 0;
 941 }
 942
 943 int config_parse_personality(
 944                 const char *unit,
 945                 const char *filename,
 946                 unsigned line,
 947                 const char *section,
 948                 unsigned section_line,
 949                 const char *lvalue,
 950                 int ltype,
 951                 const char *rvalue,
 952                 void *data,
 953                 void *userdata) {
 954
 955         unsigned long *personality = data, p;
 956
 957         assert(filename);
 958         assert(lvalue);
 959         assert(rvalue);
 960         assert(personality);
 961
 962         if (isempty(rvalue))
 963                 p = PERSONALITY_INVALID;
 964         else {
 965                 p = personality_from_string(rvalue);
 966                 if (p == PERSONALITY_INVALID) {
 967                         log_syntax(unit, LOG_WARNING, filename, line, 0, "Failed to parse personality, ignoring: %s", rvalue);
 968                         return 0;
 969                 }
 970         }
 971
 972         *personality = p;
 973         return 0;
 974 }
 975
 976 int config_parse_ifname(
 977                 const char *unit,
 978                 const char *filename,
 979                 unsigned line,
 980                 const char *section,
 981                 unsigned section_line,
 982                 const char *lvalue,
 983                 int ltype,
 984                 const char *rvalue,
 985                 void *data,
 986                 void *userdata) {
 987
 988         char **s = data;
 989         int r;
 990
 991         assert(filename);
 992         assert(lvalue);
 993         assert(rvalue);
 994         assert(data);
 995
 996         if (isempty(rvalue)) {
 997                 *s = mfree(*s);
 998                 return 0;
 999         }
1000
1001         if (!ifname_valid(rvalue)) {
1002                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue);
1003                 return 0;
1004         }
1005
1006         r = free_and_strdup(s, rvalue);
1007         if (r < 0)
1008                 return log_oom();
1009
1010         return 0;
1011 }
1012
1013 int config_parse_ifnames(
1014                 const char *unit,
1015                 const char *filename,
1016                 unsigned line,
1017                 const char *section,
1018                 unsigned section_line,
1019                 const char *lvalue,
1020                 int ltype,
1021                 const char *rvalue,
1022                 void *data,
1023                 void *userdata) {
1024
1025         _cleanup_strv_free_ char **names = NULL;
1026         char ***s = data;
1027         int r;
1028
1029         assert(filename);
1030         assert(lvalue);
1031         assert(rvalue);
1032         assert(data);
1033
1034         if (isempty(rvalue)) {
1035                 *s = strv_free(*s);
1036                 return 0;
1037         }
1038
1039         for (const char *p = rvalue;;) {
1040                 _cleanup_free_ char *word = NULL;
1041
1042                 r = extract_first_word(&p, &word, NULL, 0);
1043                 if (r == -ENOMEM)
1044                         return log_oom();
1045                 if (r < 0) {
1046                         log_syntax(unit, LOG_WARNING, filename, line, r,
1047                                    "Failed to extract interface name, ignoring assignment: %s",
1048                                    rvalue);
1049                         return 0;
1050                 }
1051                 if (r == 0)
1052                         break;
1053
1054                 if (!ifname_valid_full(word, ltype)) {
1055                         log_syntax(unit, LOG_WARNING, filename, line, 0,
1056                                    "Interface name is not valid or too long, ignoring assignment: %s",
1057                                    word);
1058                         continue;
1059                 }
1060
1061                 r = strv_consume(&names, TAKE_PTR(word));
1062                 if (r < 0)
1063                         return log_oom();
1064         }
1065
1066         r = strv_extend_strv(s, names, true);
1067         if (r < 0)
1068                 return log_oom();
1069
1070         return 0;
1071 }
1072
1073 int config_parse_ip_port(
1074                 const char *unit,
1075                 const char *filename,
1076                 unsigned line,
1077                 const char *section,
1078                 unsigned section_line,
1079                 const char *lvalue,
1080                 int ltype,
1081                 const char *rvalue,
1082                 void *data,
1083                 void *userdata) {
1084
1085         uint16_t *s = data;
1086         uint16_t port;
1087         int r;
1088
1089         assert(filename);
1090         assert(lvalue);
1091         assert(rvalue);
1092         assert(data);
1093
1094         if (isempty(rvalue)) {
1095                 *s = 0;
1096                 return 0;
1097         }
1098
1099         r = parse_ip_port(rvalue, &port);
1100         if (r < 0) {
1101                 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse port '%s'.", rvalue);
1102                 return 0;
1103         }
1104
1105         *s = port;
1106
1107         return 0;
1108 }
1109
1110 int config_parse_mtu(
1111                 const char *unit,
1112                 const char *filename,
1113                 unsigned line,
1114                 const char *section,
1115                 unsigned section_line,
1116                 const char *lvalue,
1117                 int ltype,
1118                 const char *rvalue,
1119                 void *data,
1120                 void *userdata) {
1121
1122         uint32_t *mtu = data;
1123         int r;
1124
1125         assert(rvalue);
1126         assert(mtu);
1127
1128         r = parse_mtu(ltype, rvalue, mtu);
1129         if (r == -ERANGE) {
1130                 log_syntax(unit, LOG_WARNING, filename, line, r,
1131                            "Maximum transfer unit (MTU) value out of range. Permitted range is %" PRIu32 "…%" PRIu32 ", ignoring: %s",
1132                            (uint32_t) (ltype == AF_INET6 ? IPV6_MIN_MTU : IPV4_MIN_MTU), (uint32_t) UINT32_MAX,
1133                            rvalue);
1134                 return 0;
1135         }
1136         if (r < 0) {
1137                 log_syntax(unit, LOG_WARNING, filename, line, r,
1138                            "Failed to parse MTU value '%s', ignoring: %m", rvalue);
1139                 return 0;
1140         }
1141
1142         return 0;
1143 }
1144
1145 int config_parse_rlimit(
1146                 const char *unit,
1147                 const char *filename,
1148                 unsigned line,
1149                 const char *section,
1150                 unsigned section_line,
1151                 const char *lvalue,
1152                 int ltype,
1153                 const char *rvalue,
1154                 void *data,
1155                 void *userdata) {
1156
1157         struct rlimit **rl = data, d = {};
1158         int r;
1159
1160         assert(rvalue);
1161         assert(rl);
1162
1163         r = rlimit_parse(ltype, rvalue, &d);
1164         if (r == -EILSEQ) {
1165                 log_syntax(unit, LOG_WARNING, filename, line, r, "Soft resource limit chosen higher than hard limit, ignoring: %s", rvalue);
1166                 return 0;
1167         }
1168         if (r < 0) {
1169                 log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse resource value, ignoring: %s", rvalue);
1170                 return 0;
1171         }
1172
1173         if (rl[ltype])
1174                 *rl[ltype] = d;
1175         else {
1176                 rl[ltype] = newdup(struct rlimit, &d, 1);
1177                 if (!rl[ltype])
1178                         return log_oom();
1179         }
1180
1181         return 0;
1182 }
1183
1184 int config_parse_permille(const char* unit,
1185                           const char *filename,
1186                           unsigned line,
1187                           const char *section,
1188                           unsigned section_line,
1189                           const char *lvalue,
1190                           int ltype,
1191                           const char *rvalue,
1192                           void *data,
1193                           void *userdata) {
1194
1195         unsigned *permille = data;
1196         int r;
1197
1198         assert(filename);
1199         assert(lvalue);
1200         assert(rvalue);
1201         assert(permille);
1202
1203         r = parse_permille(rvalue);
1204         if (r < 0) {
1205                 log_syntax(unit, LOG_WARNING, filename, line, r,
1206                            "Failed to parse permille value, ignoring: %s", rvalue);
1207                 return 0;
1208         }
1209
1210         *permille = (unsigned) r;
1211
1212         return 0;
1213 }
1214
1215 int config_parse_vlanprotocol(const char* unit,
1216                               const char *filename,
1217                               unsigned line,
1218                               const char *section,
1219                               unsigned section_line,
1220                               const char *lvalue,
1221                               int ltype,
1222                               const char *rvalue,
1223                               void *data,
1224                               void *userdata) {
1225         int *vlan_protocol = data;
1226         assert(filename);
1227         assert(lvalue);
1228
1229         if (isempty(rvalue)) {
1230                 *vlan_protocol = -1;
1231                 return 0;
1232         }
1233
1234         if (STR_IN_SET(rvalue, "802.1ad", "802.1AD"))
1235                 *vlan_protocol = ETH_P_8021AD;
1236         else if (STR_IN_SET(rvalue, "802.1q", "802.1Q"))
1237                 *vlan_protocol = ETH_P_8021Q;
1238         else {
1239                 log_syntax(unit, LOG_WARNING, filename, line, 0,
1240                            "Failed to parse VLAN protocol value, ignoring: %s", rvalue);
1241                 return 0;
1242         }
1243
1244         return 0;
1245 }
1246
1247 DEFINE_CONFIG_PARSE(config_parse_percent, parse_percent, "Failed to parse percent value");