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