src/shared/conf-parser.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2010 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <errno.h>
  21 #include <limits.h>
  22 #include <stdint.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <sys/types.h>
  27
  28 #include "alloc-util.h"
  29 #include "conf-files.h"
  30 #include "conf-parser.h"
  31 #include "def.h"
  32 #include "extract-word.h"
  33 #include "fd-util.h"
  34 #include "fileio.h"
  35 #include "fs-util.h"
  36 #include "log.h"
  37 #include "macro.h"
  38 #include "parse-util.h"
  39 #include "path-util.h"
  40 #include "process-util.h"
  41 #include "signal-util.h"
  42 #include "socket-util.h"
  43 #include "string-util.h"
  44 #include "strv.h"
  45 #include "syslog-util.h"
  46 #include "time-util.h"
  47 #include "utf8.h"
  48
  49 int config_item_table_lookup(
  50                 const void *table,
  51                 const char *section,
  52                 const char *lvalue,
  53                 ConfigParserCallback *func,
  54                 int *ltype,
  55                 void **data,
  56                 void *userdata) {
  57
  58         const ConfigTableItem *t;
  59
  60         assert(table);
  61         assert(lvalue);
  62         assert(func);
  63         assert(ltype);
  64         assert(data);
  65
  66         for (t = table; t->lvalue; t++) {
  67
  68                 if (!streq(lvalue, t->lvalue))
  69                         continue;
  70
  71                 if (!streq_ptr(section, t->section))
  72                         continue;
  73
  74                 *func = t->parse;
  75                 *ltype = t->ltype;
  76                 *data = t->data;
  77                 return 1;
  78         }
  79
  80         return 0;
  81 }
  82
  83 int config_item_perf_lookup(
  84                 const void *table,
  85                 const char *section,
  86                 const char *lvalue,
  87                 ConfigParserCallback *func,
  88                 int *ltype,
  89                 void **data,
  90                 void *userdata) {
  91
  92         ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
  93         const ConfigPerfItem *p;
  94
  95         assert(table);
  96         assert(lvalue);
  97         assert(func);
  98         assert(ltype);
  99         assert(data);
 100
 101         if (!section)
 102                 p = lookup(lvalue, strlen(lvalue));
 103         else {
 104                 char *key;
 105
 106                 key = strjoin(section, ".", lvalue);
 107                 if (!key)
 108                         return -ENOMEM;
 109
 110                 p = lookup(key, strlen(key));
 111                 free(key);
 112         }
 113
 114         if (!p)
 115                 return 0;
 116
 117         *func = p->parse;
 118         *ltype = p->ltype;
 119         *data = (uint8_t*) userdata + p->offset;
 120         return 1;
 121 }
 122
 123 /* Run the user supplied parser for an assignment */
 124 static int next_assignment(
 125                 const char *unit,
 126                 const char *filename,
 127                 unsigned line,
 128                 ConfigItemLookup lookup,
 129                 const void *table,
 130                 const char *section,
 131                 unsigned section_line,
 132                 const char *lvalue,
 133                 const char *rvalue,
 134                 ConfigParseFlags flags,
 135                 void *userdata) {
 136
 137         ConfigParserCallback func = NULL;
 138         int ltype = 0;
 139         void *data = NULL;
 140         int r;
 141
 142         assert(filename);
 143         assert(line > 0);
 144         assert(lookup);
 145         assert(lvalue);
 146         assert(rvalue);
 147
 148         r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
 149         if (r < 0)
 150                 return r;
 151
 152         if (r > 0) {
 153                 if (func)
 154                         return func(unit, filename, line, section, section_line,
 155                                     lvalue, ltype, rvalue, data, userdata);
 156
 157                 return 0;
 158         }
 159
 160         /* Warn about unknown non-extension fields. */
 161         if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(lvalue, "X-"))
 162                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown lvalue '%s' in section '%s'", lvalue, section);
 163
 164         return 0;
 165 }
 166
 167 /* Parse a variable assignment line */
 168 static int parse_line(
 169                 const char* unit,
 170                 const char *filename,
 171                 unsigned line,
 172                 const char *sections,
 173                 ConfigItemLookup lookup,
 174                 const void *table,
 175                 ConfigParseFlags flags,
 176                 char **section,
 177                 unsigned *section_line,
 178                 bool *section_ignored,
 179                 char *l,
 180                 void *userdata) {
 181
 182         char *e;
 183
 184         assert(filename);
 185         assert(line > 0);
 186         assert(lookup);
 187         assert(l);
 188
 189         l = strstrip(l);
 190         if (!*l)
 191                 return 0;
 192
 193         if (strchr(COMMENTS "\n", *l))
 194                 return 0;
 195
 196         if (startswith(l, ".include ")) {
 197                 _cleanup_free_ char *fn = NULL;
 198
 199                 /* .includes are a bad idea, we only support them here
 200                  * for historical reasons. They create cyclic include
 201                  * problems and make it difficult to detect
 202                  * configuration file changes with an easy
 203                  * stat(). Better approaches, such as .d/ drop-in
 204                  * snippets exist.
 205                  *
 206                  * Support for them should be eventually removed. */
 207
 208                 if (!(flags & CONFIG_PARSE_ALLOW_INCLUDE)) {
 209                         log_syntax(unit, LOG_ERR, filename, line, 0, ".include not allowed here. Ignoring.");
 210                         return 0;
 211                 }
 212
 213                 fn = file_in_same_dir(filename, strstrip(l+9));
 214                 if (!fn)
 215                         return -ENOMEM;
 216
 217                 return config_parse(unit, fn, NULL, sections, lookup, table, flags, userdata);
 218         }
 219
 220         if (*l == '[') {
 221                 size_t k;
 222                 char *n;
 223
 224                 k = strlen(l);
 225                 assert(k > 0);
 226
 227                 if (l[k-1] != ']') {
 228                         log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid section header '%s'", l);
 229                         return -EBADMSG;
 230                 }
 231
 232                 n = strndup(l+1, k-2);
 233                 if (!n)
 234                         return -ENOMEM;
 235
 236                 if (sections && !nulstr_contains(sections, n)) {
 237
 238                         if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(n, "X-"))
 239                                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown section '%s'. Ignoring.", n);
 240
 241                         free(n);
 242                         *section = mfree(*section);
 243                         *section_line = 0;
 244                         *section_ignored = true;
 245                 } else {
 246                         free(*section);
 247                         *section = n;
 248                         *section_line = line;
 249                         *section_ignored = false;
 250                 }
 251
 252                 return 0;
 253         }
 254
 255         if (sections && !*section) {
 256
 257                 if (!(flags & CONFIG_PARSE_RELAXED) && !*section_ignored)
 258                         log_syntax(unit, LOG_WARNING, filename, line, 0, "Assignment outside of section. Ignoring.");
 259
 260                 return 0;
 261         }
 262
 263         e = strchr(l, '=');
 264         if (!e) {
 265                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Missing '='.");
 266                 return -EINVAL;
 267         }
 268
 269         *e = 0;
 270         e++;
 271
 272         return next_assignment(unit,
 273                                filename,
 274                                line,
 275                                lookup,
 276                                table,
 277                                *section,
 278                                *section_line,
 279                                strstrip(l),
 280                                strstrip(e),
 281                                flags,
 282                                userdata);
 283 }
 284
 285 /* Go through the file and parse each line */
 286 int config_parse(const char *unit,
 287                  const char *filename,
 288                  FILE *f,
 289                  const char *sections,
 290                  ConfigItemLookup lookup,
 291                  const void *table,
 292                  ConfigParseFlags flags,
 293                  void *userdata) {
 294
 295         _cleanup_free_ char *section = NULL, *continuation = NULL;
 296         _cleanup_fclose_ FILE *ours = NULL;
 297         unsigned line = 0, section_line = 0;
 298         bool section_ignored = false;
 299         int r;
 300
 301         assert(filename);
 302         assert(lookup);
 303
 304         if (!f) {
 305                 f = ours = fopen(filename, "re");
 306                 if (!f) {
 307                         /* Only log on request, except for ENOENT,
 308                          * since we return 0 to the caller. */
 309                         if ((flags & CONFIG_PARSE_WARN) || errno == ENOENT)
 310                                 log_full(errno == ENOENT ? LOG_DEBUG : LOG_ERR,
 311                                          "Failed to open configuration file '%s': %m", filename);
 312                         return errno == ENOENT ? 0 : -errno;
 313                 }
 314         }
 315
 316         fd_warn_permissions(filename, fileno(f));
 317
 318         for (;;) {
 319                 _cleanup_free_ char *buf = NULL;
 320                 bool escaped = false;
 321                 char *l, *p, *e;
 322
 323                 r = read_line(f, LONG_LINE_MAX, &buf);
 324                 if (r == 0)
 325                         break;
 326                 if (r == -ENOBUFS) {
 327                         if (flags & CONFIG_PARSE_WARN)
 328                                 log_error_errno(r, "%s:%u: Line too long", filename, line);
 329
 330                         return r;
 331                 }
 332                 if (r < 0) {
 333                         if (CONFIG_PARSE_WARN)
 334                                 log_error_errno(r, "%s:%u: Error while reading configuration file: %m", filename, line);
 335
 336                         return r;
 337                 }
 338
 339                 l = buf;
 340                 if (!(flags & CONFIG_PARSE_REFUSE_BOM)) {
 341                         char *q;
 342
 343                         q = startswith(buf, UTF8_BYTE_ORDER_MARK);
 344                         if (q) {
 345                                 l = q;
 346                                 flags |= CONFIG_PARSE_REFUSE_BOM;
 347                         }
 348                 }
 349
 350                 if (continuation) {
 351                         if (strlen(continuation) + strlen(l) > LONG_LINE_MAX) {
 352                                 if (flags & CONFIG_PARSE_WARN)
 353                                         log_error("%s:%u: Continuation line too long", filename, line);
 354                                 return -ENOBUFS;
 355                         }
 356
 357                         if (!strextend(&continuation, l, NULL)) {
 358                                 if (flags & CONFIG_PARSE_WARN)
 359                                         log_oom();
 360                                 return -ENOMEM;
 361                         }
 362
 363                         p = continuation;
 364                 } else
 365                         p = l;
 366
 367                 for (e = p; *e; e++) {
 368                         if (escaped)
 369                                 escaped = false;
 370                         else if (*e == '\\')
 371                                 escaped = true;
 372                 }
 373
 374                 if (escaped) {
 375                         *(e-1) = ' ';
 376
 377                         if (!continuation) {
 378                                 continuation = strdup(l);
 379                                 if (!continuation) {
 380                                         if (flags & CONFIG_PARSE_WARN)
 381                                                 log_oom();
 382                                         return -ENOMEM;
 383                                 }
 384                         }
 385
 386                         continue;
 387                 }
 388
 389                 r = parse_line(unit,
 390                                filename,
 391                                ++line,
 392                                sections,
 393                                lookup,
 394                                table,
 395                                flags,
 396                                &section,
 397                                &section_line,
 398                                &section_ignored,
 399                                p,
 400                                userdata);
 401                 if (r < 0) {
 402                         if (flags & CONFIG_PARSE_WARN)
 403                                 log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
 404                         return r;
 405
 406                 }
 407
 408                 continuation = mfree(continuation);
 409         }
 410
 411         return 0;
 412 }
 413
 414 static int config_parse_many_files(
 415                 const char *conf_file,
 416                 char **files,
 417                 const char *sections,
 418                 ConfigItemLookup lookup,
 419                 const void *table,
 420                 ConfigParseFlags flags,
 421                 void *userdata) {
 422
 423         char **fn;
 424         int r;
 425
 426         if (conf_file) {
 427                 r = config_parse(NULL, conf_file, NULL, sections, lookup, table, flags, userdata);
 428                 if (r < 0)
 429                         return r;
 430         }
 431
 432         STRV_FOREACH(fn, files) {
 433                 r = config_parse(NULL, *fn, NULL, sections, lookup, table, flags, userdata);
 434                 if (r < 0)
 435                         return r;
 436         }
 437
 438         return 0;
 439 }
 440
 441 /* Parse each config file in the directories specified as nulstr. */
 442 int config_parse_many_nulstr(
 443                 const char *conf_file,
 444                 const char *conf_file_dirs,
 445                 const char *sections,
 446                 ConfigItemLookup lookup,
 447                 const void *table,
 448                 ConfigParseFlags flags,
 449                 void *userdata) {
 450
 451         _cleanup_strv_free_ char **files = NULL;
 452         int r;
 453
 454         r = conf_files_list_nulstr(&files, ".conf", NULL, 0, conf_file_dirs);
 455         if (r < 0)
 456                 return r;
 457
 458         return config_parse_many_files(conf_file, files, sections, lookup, table, flags, userdata);
 459 }
 460
 461 /* Parse each config file in the directories specified as strv. */
 462 int config_parse_many(
 463                 const char *conf_file,
 464                 const char* const* conf_file_dirs,
 465                 const char *dropin_dirname,
 466                 const char *sections,
 467                 ConfigItemLookup lookup,
 468                 const void *table,
 469                 ConfigParseFlags flags,
 470                 void *userdata) {
 471
 472         _cleanup_strv_free_ char **dropin_dirs = NULL;
 473         _cleanup_strv_free_ char **files = NULL;
 474         const char *suffix;
 475         int r;
 476
 477         suffix = strjoina("/", dropin_dirname);
 478         r = strv_extend_strv_concat(&dropin_dirs, (char**) conf_file_dirs, suffix);
 479         if (r < 0)
 480                 return r;
 481
 482         r = conf_files_list_strv(&files, ".conf", NULL, 0, (const char* const*) dropin_dirs);
 483         if (r < 0)
 484                 return r;
 485
 486         return config_parse_many_files(conf_file, files, sections, lookup, table, flags, userdata);
 487 }
 488
 489 #define DEFINE_PARSER(type, vartype, conv_func)                         \
 490         int config_parse_##type(                                        \
 491                         const char *unit,                               \
 492                         const char *filename,                           \
 493                         unsigned line,                                  \
 494                         const char *section,                            \
 495                         unsigned section_line,                          \
 496                         const char *lvalue,                             \
 497                         int ltype,                                      \
 498                         const char *rvalue,                             \
 499                         void *data,                                     \
 500                         void *userdata) {                               \
 501                                                                         \
 502                 vartype *i = data;                                      \
 503                 int r;                                                  \
 504                                                                         \
 505                 assert(filename);                                       \
 506                 assert(lvalue);                                         \
 507                 assert(rvalue);                                         \
 508                 assert(data);                                           \
 509                                                                         \
 510                 r = conv_func(rvalue, i);                               \
 511                 if (r < 0)                                              \
 512                         log_syntax(unit, LOG_ERR, filename, line, r,    \
 513                                    "Failed to parse %s value, ignoring: %s", \
 514                                    #type, rvalue);                      \
 515                                                                         \
 516                 return 0;                                               \
 517         }                                                               \
 518         struct __useless_struct_to_allow_trailing_semicolon__
 519
 520 DEFINE_PARSER(int, int, safe_atoi);
 521 DEFINE_PARSER(long, long, safe_atoli);
 522 DEFINE_PARSER(uint8, uint8_t, safe_atou8);
 523 DEFINE_PARSER(uint16, uint16_t, safe_atou16);
 524 DEFINE_PARSER(uint32, uint32_t, safe_atou32);
 525 DEFINE_PARSER(uint64, uint64_t, safe_atou64);
 526 DEFINE_PARSER(unsigned, unsigned, safe_atou);
 527 DEFINE_PARSER(double, double, safe_atod);
 528 DEFINE_PARSER(nsec, nsec_t, parse_nsec);
 529 DEFINE_PARSER(sec, usec_t, parse_sec);
 530 DEFINE_PARSER(mode, mode_t, parse_mode);
 531
 532 int config_parse_iec_size(const char* unit,
 533                             const char *filename,
 534                             unsigned line,
 535                             const char *section,
 536                             unsigned section_line,
 537                             const char *lvalue,
 538                             int ltype,
 539                             const char *rvalue,
 540                             void *data,
 541                             void *userdata) {
 542
 543         size_t *sz = data;
 544         uint64_t v;
 545         int r;
 546
 547         assert(filename);
 548         assert(lvalue);
 549         assert(rvalue);
 550         assert(data);
 551
 552         r = parse_size(rvalue, 1024, &v);
 553         if (r < 0 || (uint64_t) (size_t) v != v) {
 554                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 555                 return 0;
 556         }
 557
 558         *sz = (size_t) v;
 559         return 0;
 560 }
 561
 562 int config_parse_si_size(
 563                 const char* unit,
 564                 const char *filename,
 565                 unsigned line,
 566                 const char *section,
 567                 unsigned section_line,
 568                 const char *lvalue,
 569                 int ltype,
 570                 const char *rvalue,
 571                 void *data,
 572                 void *userdata) {
 573
 574         size_t *sz = data;
 575         uint64_t v;
 576         int r;
 577
 578         assert(filename);
 579         assert(lvalue);
 580         assert(rvalue);
 581         assert(data);
 582
 583         r = parse_size(rvalue, 1000, &v);
 584         if (r < 0 || (uint64_t) (size_t) v != v) {
 585                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 586                 return 0;
 587         }
 588
 589         *sz = (size_t) v;
 590         return 0;
 591 }
 592
 593 int config_parse_iec_uint64(
 594                 const char* unit,
 595                 const char *filename,
 596                 unsigned line,
 597                 const char *section,
 598                 unsigned section_line,
 599                 const char *lvalue,
 600                 int ltype,
 601                 const char *rvalue,
 602                 void *data,
 603                 void *userdata) {
 604
 605         uint64_t *bytes = data;
 606         int r;
 607
 608         assert(filename);
 609         assert(lvalue);
 610         assert(rvalue);
 611         assert(data);
 612
 613         r = parse_size(rvalue, 1024, bytes);
 614         if (r < 0)
 615                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 616
 617         return 0;
 618 }
 619
 620 int config_parse_bool(const char* unit,
 621                       const char *filename,
 622                       unsigned line,
 623                       const char *section,
 624                       unsigned section_line,
 625                       const char *lvalue,
 626                       int ltype,
 627                       const char *rvalue,
 628                       void *data,
 629                       void *userdata) {
 630
 631         int k;
 632         bool *b = data;
 633         bool fatal = ltype;
 634
 635         assert(filename);
 636         assert(lvalue);
 637         assert(rvalue);
 638         assert(data);
 639
 640         k = parse_boolean(rvalue);
 641         if (k < 0) {
 642                 log_syntax(unit, LOG_ERR, filename, line, k,
 643                            "Failed to parse boolean value%s: %s",
 644                            fatal ? "" : ", ignoring", rvalue);
 645                 return fatal ? -ENOEXEC : 0;
 646         }
 647
 648         *b = !!k;
 649         return 0;
 650 }
 651
 652 int config_parse_tristate(
 653                 const char* unit,
 654                 const char *filename,
 655                 unsigned line,
 656                 const char *section,
 657                 unsigned section_line,
 658                 const char *lvalue,
 659                 int ltype,
 660                 const char *rvalue,
 661                 void *data,
 662                 void *userdata) {
 663
 664         int k, *t = data;
 665
 666         assert(filename);
 667         assert(lvalue);
 668         assert(rvalue);
 669         assert(data);
 670
 671         /* A tristate is pretty much a boolean, except that it can
 672          * also take the special value -1, indicating "uninitialized",
 673          * much like NULL is for a pointer type. */
 674
 675         k = parse_boolean(rvalue);
 676         if (k < 0) {
 677                 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
 678                 return 0;
 679         }
 680
 681         *t = !!k;
 682         return 0;
 683 }
 684
 685 int config_parse_string(
 686                 const char *unit,
 687                 const char *filename,
 688                 unsigned line,
 689                 const char *section,
 690                 unsigned section_line,
 691                 const char *lvalue,
 692                 int ltype,
 693                 const char *rvalue,
 694                 void *data,
 695                 void *userdata) {
 696
 697         char **s = data, *n;
 698
 699         assert(filename);
 700         assert(lvalue);
 701         assert(rvalue);
 702         assert(data);
 703
 704         if (!utf8_is_valid(rvalue)) {
 705                 log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 706                 return 0;
 707         }
 708
 709         if (isempty(rvalue))
 710                 n = NULL;
 711         else {
 712                 n = strdup(rvalue);
 713                 if (!n)
 714                         return log_oom();
 715         }
 716
 717         free(*s);
 718         *s = n;
 719
 720         return 0;
 721 }
 722
 723 int config_parse_path(
 724                 const char *unit,
 725                 const char *filename,
 726                 unsigned line,
 727                 const char *section,
 728                 unsigned section_line,
 729                 const char *lvalue,
 730                 int ltype,
 731                 const char *rvalue,
 732                 void *data,
 733                 void *userdata) {
 734
 735         char **s = data, *n;
 736         bool fatal = ltype;
 737
 738         assert(filename);
 739         assert(lvalue);
 740         assert(rvalue);
 741         assert(data);
 742
 743         if (isempty(rvalue)) {
 744                 n = NULL;
 745                 goto finalize;
 746         }
 747
 748         if (!utf8_is_valid(rvalue)) {
 749                 log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 750                 return fatal ? -ENOEXEC : 0;
 751         }
 752
 753         if (!path_is_absolute(rvalue)) {
 754                 log_syntax(unit, LOG_ERR, filename, line, 0,
 755                            "Not an absolute path%s: %s",
 756                            fatal ? "" : ", ignoring", rvalue);
 757                 return fatal ? -ENOEXEC : 0;
 758         }
 759
 760         n = strdup(rvalue);
 761         if (!n)
 762                 return log_oom();
 763
 764         path_kill_slashes(n);
 765
 766 finalize:
 767         free(*s);
 768         *s = n;
 769
 770         return 0;
 771 }
 772
 773 int config_parse_strv(
 774                 const char *unit,
 775                 const char *filename,
 776                 unsigned line,
 777                 const char *section,
 778                 unsigned section_line,
 779                 const char *lvalue,
 780                 int ltype,
 781                 const char *rvalue,
 782                 void *data,
 783                 void *userdata) {
 784
 785         char ***sv = data;
 786         int r;
 787
 788         assert(filename);
 789         assert(lvalue);
 790         assert(rvalue);
 791         assert(data);
 792
 793         if (isempty(rvalue)) {
 794                 *sv = strv_free(*sv);
 795                 return 0;
 796         }
 797
 798         for (;;) {
 799                 char *word = NULL;
 800
 801                 r = extract_first_word(&rvalue, &word, NULL, EXTRACT_QUOTES|EXTRACT_RETAIN_ESCAPE);
 802                 if (r == 0)
 803                         break;
 804                 if (r == -ENOMEM)
 805                         return log_oom();
 806                 if (r < 0) {
 807                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
 808                         break;
 809                 }
 810
 811                 if (!utf8_is_valid(word)) {
 812                         log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, word);
 813                         free(word);
 814                         continue;
 815                 }
 816
 817                 r = strv_consume(sv, word);
 818                 if (r < 0)
 819                         return log_oom();
 820         }
 821
 822         return 0;
 823 }
 824
 825 int config_parse_log_facility(
 826                 const char *unit,
 827                 const char *filename,
 828                 unsigned line,
 829                 const char *section,
 830                 unsigned section_line,
 831                 const char *lvalue,
 832                 int ltype,
 833                 const char *rvalue,
 834                 void *data,
 835                 void *userdata) {
 836
 837         int *o = data, x;
 838
 839         assert(filename);
 840         assert(lvalue);
 841         assert(rvalue);
 842         assert(data);
 843
 844         x = log_facility_unshifted_from_string(rvalue);
 845         if (x < 0) {
 846                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log facility, ignoring: %s", rvalue);
 847                 return 0;
 848         }
 849
 850         *o = (x << 3) | LOG_PRI(*o);
 851
 852         return 0;
 853 }
 854
 855 int config_parse_log_level(
 856                 const char *unit,
 857                 const char *filename,
 858                 unsigned line,
 859                 const char *section,
 860                 unsigned section_line,
 861                 const char *lvalue,
 862                 int ltype,
 863                 const char *rvalue,
 864                 void *data,
 865                 void *userdata) {
 866
 867         int *o = data, x;
 868
 869         assert(filename);
 870         assert(lvalue);
 871         assert(rvalue);
 872         assert(data);
 873
 874         x = log_level_from_string(rvalue);
 875         if (x < 0) {
 876                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log level, ignoring: %s", rvalue);
 877                 return 0;
 878         }
 879
 880         if (*o < 0) /* if it wasn't initialized so far, assume zero facility */
 881                 *o = x;
 882         else
 883                 *o = (*o & LOG_FACMASK) | x;
 884
 885         return 0;
 886 }
 887
 888 int config_parse_signal(
 889                 const char *unit,
 890                 const char *filename,
 891                 unsigned line,
 892                 const char *section,
 893                 unsigned section_line,
 894                 const char *lvalue,
 895                 int ltype,
 896                 const char *rvalue,
 897                 void *data,
 898                 void *userdata) {
 899
 900         int *sig = data, r;
 901
 902         assert(filename);
 903         assert(lvalue);
 904         assert(rvalue);
 905         assert(sig);
 906
 907         r = signal_from_string_try_harder(rvalue);
 908         if (r <= 0) {
 909                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse signal name, ignoring: %s", rvalue);
 910                 return 0;
 911         }
 912
 913         *sig = r;
 914         return 0;
 915 }
 916
 917 int config_parse_personality(
 918                 const char *unit,
 919                 const char *filename,
 920                 unsigned line,
 921                 const char *section,
 922                 unsigned section_line,
 923                 const char *lvalue,
 924                 int ltype,
 925                 const char *rvalue,
 926                 void *data,
 927                 void *userdata) {
 928
 929         unsigned long *personality = data, p;
 930
 931         assert(filename);
 932         assert(lvalue);
 933         assert(rvalue);
 934         assert(personality);
 935
 936         if (isempty(rvalue))
 937                 p = PERSONALITY_INVALID;
 938         else {
 939                 p = personality_from_string(rvalue);
 940                 if (p == PERSONALITY_INVALID) {
 941                         log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse personality, ignoring: %s", rvalue);
 942                         return 0;
 943                 }
 944         }
 945
 946         *personality = p;
 947         return 0;
 948 }
 949
 950 int config_parse_ifname(
 951                 const char *unit,
 952                 const char *filename,
 953                 unsigned line,
 954                 const char *section,
 955                 unsigned section_line,
 956                 const char *lvalue,
 957                 int ltype,
 958                 const char *rvalue,
 959                 void *data,
 960                 void *userdata) {
 961
 962         char **s = data;
 963         int r;
 964
 965         assert(filename);
 966         assert(lvalue);
 967         assert(rvalue);
 968         assert(data);
 969
 970         if (isempty(rvalue)) {
 971                 *s = mfree(*s);
 972                 return 0;
 973         }
 974
 975         if (!ifname_valid(rvalue)) {
 976                 log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue);
 977                 return 0;
 978         }
 979
 980         r = free_and_strdup(s, rvalue);
 981         if (r < 0)
 982                 return log_oom();
 983
 984         return 0;
 985 }
 986
 987 int config_parse_ip_port(
 988                 const char *unit,
 989                 const char *filename,
 990                 unsigned line,
 991                 const char *section,
 992                 unsigned section_line,
 993                 const char *lvalue,
 994                 int ltype,
 995                 const char *rvalue,
 996                 void *data,
 997                 void *userdata) {
 998
 999         uint16_t *s = data;
1000         uint16_t port;
1001         int r;
1002
1003         assert(filename);
1004         assert(lvalue);
1005         assert(rvalue);
1006         assert(data);
1007
1008         if (isempty(rvalue)) {
1009                 *s = 0;
1010                 return 0;
1011         }
1012
1013         r = parse_ip_port(rvalue, &port);
1014         if (r < 0) {
1015                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse port '%s'.", rvalue);
1016                 return 0;
1017         }
1018
1019         *s = port;
1020
1021         return 0;
1022 }