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 "extract-word.h"
  32 #include "fd-util.h"
  33 #include "fs-util.h"
  34 #include "log.h"
  35 #include "macro.h"
  36 #include "parse-util.h"
  37 #include "path-util.h"
  38 #include "process-util.h"
  39 #include "signal-util.h"
  40 #include "string-util.h"
  41 #include "strv.h"
  42 #include "syslog-util.h"
  43 #include "time-util.h"
  44 #include "utf8.h"
  45
  46 int config_item_table_lookup(
  47                 const void *table,
  48                 const char *section,
  49                 const char *lvalue,
  50                 ConfigParserCallback *func,
  51                 int *ltype,
  52                 void **data,
  53                 void *userdata) {
  54
  55         const ConfigTableItem *t;
  56
  57         assert(table);
  58         assert(lvalue);
  59         assert(func);
  60         assert(ltype);
  61         assert(data);
  62
  63         for (t = table; t->lvalue; t++) {
  64
  65                 if (!streq(lvalue, t->lvalue))
  66                         continue;
  67
  68                 if (!streq_ptr(section, t->section))
  69                         continue;
  70
  71                 *func = t->parse;
  72                 *ltype = t->ltype;
  73                 *data = t->data;
  74                 return 1;
  75         }
  76
  77         return 0;
  78 }
  79
  80 int config_item_perf_lookup(
  81                 const void *table,
  82                 const char *section,
  83                 const char *lvalue,
  84                 ConfigParserCallback *func,
  85                 int *ltype,
  86                 void **data,
  87                 void *userdata) {
  88
  89         ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
  90         const ConfigPerfItem *p;
  91
  92         assert(table);
  93         assert(lvalue);
  94         assert(func);
  95         assert(ltype);
  96         assert(data);
  97
  98         if (!section)
  99                 p = lookup(lvalue, strlen(lvalue));
 100         else {
 101                 char *key;
 102
 103                 key = strjoin(section, ".", lvalue);
 104                 if (!key)
 105                         return -ENOMEM;
 106
 107                 p = lookup(key, strlen(key));
 108                 free(key);
 109         }
 110
 111         if (!p)
 112                 return 0;
 113
 114         *func = p->parse;
 115         *ltype = p->ltype;
 116         *data = (uint8_t*) userdata + p->offset;
 117         return 1;
 118 }
 119
 120 /* Run the user supplied parser for an assignment */
 121 static int next_assignment(const char *unit,
 122                            const char *filename,
 123                            unsigned line,
 124                            ConfigItemLookup lookup,
 125                            const void *table,
 126                            const char *section,
 127                            unsigned section_line,
 128                            const char *lvalue,
 129                            const char *rvalue,
 130                            bool relaxed,
 131                            void *userdata) {
 132
 133         ConfigParserCallback func = NULL;
 134         int ltype = 0;
 135         void *data = NULL;
 136         int r;
 137
 138         assert(filename);
 139         assert(line > 0);
 140         assert(lookup);
 141         assert(lvalue);
 142         assert(rvalue);
 143
 144         r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
 145         if (r < 0)
 146                 return r;
 147
 148         if (r > 0) {
 149                 if (func)
 150                         return func(unit, filename, line, section, section_line,
 151                                     lvalue, ltype, rvalue, data, userdata);
 152
 153                 return 0;
 154         }
 155
 156         /* Warn about unknown non-extension fields. */
 157         if (!relaxed && !startswith(lvalue, "X-"))
 158                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown lvalue '%s' in section '%s'", lvalue, section);
 159
 160         return 0;
 161 }
 162
 163 /* Parse a variable assignment line */
 164 static int parse_line(const char* unit,
 165                       const char *filename,
 166                       unsigned line,
 167                       const char *sections,
 168                       ConfigItemLookup lookup,
 169                       const void *table,
 170                       bool relaxed,
 171                       bool allow_include,
 172                       char **section,
 173                       unsigned *section_line,
 174                       bool *section_ignored,
 175                       char *l,
 176                       void *userdata) {
 177
 178         char *e;
 179
 180         assert(filename);
 181         assert(line > 0);
 182         assert(lookup);
 183         assert(l);
 184
 185         l = strstrip(l);
 186
 187         if (!*l)
 188                 return 0;
 189
 190         if (strchr(COMMENTS "\n", *l))
 191                 return 0;
 192
 193         if (startswith(l, ".include ")) {
 194                 _cleanup_free_ char *fn = NULL;
 195
 196                 /* .includes are a bad idea, we only support them here
 197                  * for historical reasons. They create cyclic include
 198                  * problems and make it difficult to detect
 199                  * configuration file changes with an easy
 200                  * stat(). Better approaches, such as .d/ drop-in
 201                  * snippets exist.
 202                  *
 203                  * Support for them should be eventually removed. */
 204
 205                 if (!allow_include) {
 206                         log_syntax(unit, LOG_ERR, filename, line, 0, ".include not allowed here. Ignoring.");
 207                         return 0;
 208                 }
 209
 210                 fn = file_in_same_dir(filename, strstrip(l+9));
 211                 if (!fn)
 212                         return -ENOMEM;
 213
 214                 return config_parse(unit, fn, NULL, sections, lookup, table, relaxed, false, false, userdata);
 215         }
 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 (!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 (!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                                relaxed,
 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                  bool relaxed,
 290                  bool allow_include,
 291                  bool warn,
 292                  void *userdata) {
 293
 294         _cleanup_free_ char *section = NULL, *continuation = NULL;
 295         _cleanup_fclose_ FILE *ours = NULL;
 296         unsigned line = 0, section_line = 0;
 297         bool section_ignored = false, allow_bom = true;
 298         int r;
 299
 300         assert(filename);
 301         assert(lookup);
 302
 303         if (!f) {
 304                 f = ours = fopen(filename, "re");
 305                 if (!f) {
 306                         /* Only log on request, except for ENOENT,
 307                          * since we return 0 to the caller. */
 308                         if (warn || errno == ENOENT)
 309                                 log_full(errno == ENOENT ? LOG_DEBUG : LOG_ERR,
 310                                          "Failed to open configuration file '%s': %m", filename);
 311                         return errno == ENOENT ? 0 : -errno;
 312                 }
 313         }
 314
 315         fd_warn_permissions(filename, fileno(f));
 316
 317         for (;;) {
 318                 char buf[LINE_MAX], *l, *p, *c = NULL, *e;
 319                 bool escaped = false;
 320
 321                 if (!fgets(buf, sizeof buf, f)) {
 322                         if (feof(f))
 323                                 break;
 324
 325                         return log_error_errno(errno, "Failed to read configuration file '%s': %m", filename);
 326                 }
 327
 328                 l = buf;
 329                 if (allow_bom && startswith(l, UTF8_BYTE_ORDER_MARK))
 330                         l += strlen(UTF8_BYTE_ORDER_MARK);
 331                 allow_bom = false;
 332
 333                 truncate_nl(l);
 334
 335                 if (continuation) {
 336                         c = strappend(continuation, l);
 337                         if (!c) {
 338                                 if (warn)
 339                                         log_oom();
 340                                 return -ENOMEM;
 341                         }
 342
 343                         continuation = mfree(continuation);
 344                         p = c;
 345                 } else
 346                         p = l;
 347
 348                 for (e = p; *e; e++) {
 349                         if (escaped)
 350                                 escaped = false;
 351                         else if (*e == '\\')
 352                                 escaped = true;
 353                 }
 354
 355                 if (escaped) {
 356                         *(e-1) = ' ';
 357
 358                         if (c)
 359                                 continuation = c;
 360                         else {
 361                                 continuation = strdup(l);
 362                                 if (!continuation) {
 363                                         if (warn)
 364                                                 log_oom();
 365                                         return -ENOMEM;
 366                                 }
 367                         }
 368
 369                         continue;
 370                 }
 371
 372                 r = parse_line(unit,
 373                                filename,
 374                                ++line,
 375                                sections,
 376                                lookup,
 377                                table,
 378                                relaxed,
 379                                allow_include,
 380                                &section,
 381                                &section_line,
 382                                &section_ignored,
 383                                p,
 384                                userdata);
 385                 free(c);
 386
 387                 if (r < 0) {
 388                         if (warn)
 389                                 log_warning_errno(r, "Failed to parse file '%s': %m",
 390                                                   filename);
 391                         return r;
 392                 }
 393         }
 394
 395         return 0;
 396 }
 397
 398 static int config_parse_many_files(
 399                 const char *conf_file,
 400                 char **files,
 401                 const char *sections,
 402                 ConfigItemLookup lookup,
 403                 const void *table,
 404                 bool relaxed,
 405                 void *userdata) {
 406
 407         char **fn;
 408         int r;
 409
 410         if (conf_file) {
 411                 r = config_parse(NULL, conf_file, NULL, sections, lookup, table, relaxed, false, true, userdata);
 412                 if (r < 0)
 413                         return r;
 414         }
 415
 416         STRV_FOREACH(fn, files) {
 417                 r = config_parse(NULL, *fn, NULL, sections, lookup, table, relaxed, false, true, userdata);
 418                 if (r < 0)
 419                         return r;
 420         }
 421
 422         return 0;
 423 }
 424
 425 /* Parse each config file in the directories specified as nulstr. */
 426 int config_parse_many_nulstr(
 427                 const char *conf_file,
 428                 const char *conf_file_dirs,
 429                 const char *sections,
 430                 ConfigItemLookup lookup,
 431                 const void *table,
 432                 bool relaxed,
 433                 void *userdata) {
 434
 435         _cleanup_strv_free_ char **files = NULL;
 436         int r;
 437
 438         r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs);
 439         if (r < 0)
 440                 return r;
 441
 442         return config_parse_many_files(conf_file, files,
 443                                        sections, lookup, table, relaxed, userdata);
 444 }
 445
 446 #if 0 /// UNNEEDED by elogind
 447 /* Parse each config file in the directories specified as strv. */
 448 int config_parse_many(
 449                 const char *conf_file,
 450                 const char* const* conf_file_dirs,
 451                 const char *dropin_dirname,
 452                 const char *sections,
 453                 ConfigItemLookup lookup,
 454                 const void *table,
 455                 bool relaxed,
 456                 void *userdata) {
 457
 458         _cleanup_strv_free_ char **dropin_dirs = NULL;
 459         _cleanup_strv_free_ char **files = NULL;
 460         const char *suffix;
 461         int r;
 462
 463         suffix = strjoina("/", dropin_dirname);
 464         r = strv_extend_strv_concat(&dropin_dirs, (char**) conf_file_dirs, suffix);
 465         if (r < 0)
 466                 return r;
 467
 468         r = conf_files_list_strv(&files, ".conf", NULL, (const char* const*) dropin_dirs);
 469         if (r < 0)
 470                 return r;
 471
 472         return config_parse_many_files(conf_file, files,
 473                                        sections, lookup, table, relaxed, userdata);
 474 }
 475 #endif // 0
 476
 477 #define DEFINE_PARSER(type, vartype, conv_func)                         \
 478         int config_parse_##type(                                        \
 479                         const char *unit,                               \
 480                         const char *filename,                           \
 481                         unsigned line,                                  \
 482                         const char *section,                            \
 483                         unsigned section_line,                          \
 484                         const char *lvalue,                             \
 485                         int ltype,                                      \
 486                         const char *rvalue,                             \
 487                         void *data,                                     \
 488                         void *userdata) {                               \
 489                                                                         \
 490                 vartype *i = data;                                      \
 491                 int r;                                                  \
 492                                                                         \
 493                 assert(filename);                                       \
 494                 assert(lvalue);                                         \
 495                 assert(rvalue);                                         \
 496                 assert(data);                                           \
 497                                                                         \
 498                 r = conv_func(rvalue, i);                               \
 499                 if (r < 0)                                              \
 500                         log_syntax(unit, LOG_ERR, filename, line, r,    \
 501                                    "Failed to parse %s value, ignoring: %s", \
 502                                    #type, rvalue);                      \
 503                                                                         \
 504                 return 0;                                               \
 505         }                                                               \
 506         struct __useless_struct_to_allow_trailing_semicolon__
 507
 508 DEFINE_PARSER(int, int, safe_atoi);
 509 DEFINE_PARSER(long, long, safe_atoli);
 510 #if 0 /// UNNEEDED by elogind
 511 DEFINE_PARSER(uint8, uint8_t, safe_atou8);
 512 DEFINE_PARSER(uint16, uint16_t, safe_atou16);
 513 DEFINE_PARSER(uint32, uint32_t, safe_atou32);
 514 #endif // 0
 515 DEFINE_PARSER(uint64, uint64_t, safe_atou64);
 516 DEFINE_PARSER(unsigned, unsigned, safe_atou);
 517 DEFINE_PARSER(double, double, safe_atod);
 518 #if 0 /// UNNEEDED by elogind
 519 DEFINE_PARSER(nsec, nsec_t, parse_nsec);
 520 #endif // 0
 521 DEFINE_PARSER(sec, usec_t, parse_sec);
 522 DEFINE_PARSER(mode, mode_t, parse_mode);
 523
 524 int config_parse_iec_size(const char* unit,
 525                             const char *filename,
 526                             unsigned line,
 527                             const char *section,
 528                             unsigned section_line,
 529                             const char *lvalue,
 530                             int ltype,
 531                             const char *rvalue,
 532                             void *data,
 533                             void *userdata) {
 534
 535         size_t *sz = data;
 536         uint64_t v;
 537         int r;
 538
 539         assert(filename);
 540         assert(lvalue);
 541         assert(rvalue);
 542         assert(data);
 543
 544         r = parse_size(rvalue, 1024, &v);
 545         if (r < 0 || (uint64_t) (size_t) v != v) {
 546                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 547                 return 0;
 548         }
 549
 550         *sz = (size_t) v;
 551         return 0;
 552 }
 553
 554 #if 0 /// UNNEEDED by elogind
 555 int config_parse_si_size(const char* unit,
 556                             const char *filename,
 557                             unsigned line,
 558                             const char *section,
 559                             unsigned section_line,
 560                             const char *lvalue,
 561                             int ltype,
 562                             const char *rvalue,
 563                             void *data,
 564                             void *userdata) {
 565
 566         size_t *sz = data;
 567         uint64_t v;
 568         int r;
 569
 570         assert(filename);
 571         assert(lvalue);
 572         assert(rvalue);
 573         assert(data);
 574
 575         r = parse_size(rvalue, 1000, &v);
 576         if (r < 0 || (uint64_t) (size_t) v != v) {
 577                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 578                 return 0;
 579         }
 580
 581         *sz = (size_t) v;
 582         return 0;
 583 }
 584
 585 int config_parse_iec_uint64(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_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 607
 608         return 0;
 609 }
 610 #endif // 0
 611
 612 int config_parse_bool(const char* unit,
 613                       const char *filename,
 614                       unsigned line,
 615                       const char *section,
 616                       unsigned section_line,
 617                       const char *lvalue,
 618                       int ltype,
 619                       const char *rvalue,
 620                       void *data,
 621                       void *userdata) {
 622
 623         int k;
 624         bool *b = data;
 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, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
 634                 return 0;
 635         }
 636
 637         *b = !!k;
 638         return 0;
 639 }
 640
 641 #if 0 /// UNNEEDED by elogind
 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 #endif // 0
 675
 676 int config_parse_string(
 677                 const char *unit,
 678                 const char *filename,
 679                 unsigned line,
 680                 const char *section,
 681                 unsigned section_line,
 682                 const char *lvalue,
 683                 int ltype,
 684                 const char *rvalue,
 685                 void *data,
 686                 void *userdata) {
 687
 688         char **s = data, *n;
 689
 690         assert(filename);
 691         assert(lvalue);
 692         assert(rvalue);
 693         assert(data);
 694
 695         if (!utf8_is_valid(rvalue)) {
 696                 log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 697                 return 0;
 698         }
 699
 700         if (isempty(rvalue))
 701                 n = NULL;
 702         else {
 703                 n = strdup(rvalue);
 704                 if (!n)
 705                         return log_oom();
 706         }
 707
 708         free(*s);
 709         *s = n;
 710
 711         return 0;
 712 }
 713
 714 int config_parse_path(
 715                 const char *unit,
 716                 const char *filename,
 717                 unsigned line,
 718                 const char *section,
 719                 unsigned section_line,
 720                 const char *lvalue,
 721                 int ltype,
 722                 const char *rvalue,
 723                 void *data,
 724                 void *userdata) {
 725
 726         char **s = data, *n;
 727
 728         assert(filename);
 729         assert(lvalue);
 730         assert(rvalue);
 731         assert(data);
 732
 733         if (!utf8_is_valid(rvalue)) {
 734                 log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 735                 return 0;
 736         }
 737
 738         if (!path_is_absolute(rvalue)) {
 739                 log_syntax(unit, LOG_ERR, filename, line, 0, "Not an absolute path, ignoring: %s", rvalue);
 740                 return 0;
 741         }
 742
 743         n = strdup(rvalue);
 744         if (!n)
 745                 return log_oom();
 746
 747         path_kill_slashes(n);
 748
 749         free(*s);
 750         *s = n;
 751
 752         return 0;
 753 }
 754
 755 int config_parse_strv(const char *unit,
 756                       const char *filename,
 757                       unsigned line,
 758                       const char *section,
 759                       unsigned section_line,
 760                       const char *lvalue,
 761                       int ltype,
 762                       const char *rvalue,
 763                       void *data,
 764                       void *userdata) {
 765
 766         char ***sv = data;
 767         int r;
 768
 769         assert(filename);
 770         assert(lvalue);
 771         assert(rvalue);
 772         assert(data);
 773
 774         if (isempty(rvalue)) {
 775                 char **empty;
 776
 777                 /* Empty assignment resets the list. As a special rule
 778                  * we actually fill in a real empty array here rather
 779                  * than NULL, since some code wants to know if
 780                  * something was set at all... */
 781                 empty = new0(char*, 1);
 782                 if (!empty)
 783                         return log_oom();
 784
 785                 strv_free(*sv);
 786                 *sv = empty;
 787
 788                 return 0;
 789         }
 790
 791         for (;;) {
 792                 char *word = NULL;
 793
 794                 r = extract_first_word(&rvalue, &word, NULL, EXTRACT_QUOTES|EXTRACT_RETAIN_ESCAPE);
 795                 if (r == 0)
 796                         break;
 797                 if (r == -ENOMEM)
 798                         return log_oom();
 799                 if (r < 0) {
 800                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
 801                         break;
 802                 }
 803
 804                 if (!utf8_is_valid(word)) {
 805                         log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, word);
 806                         free(word);
 807                         continue;
 808                 }
 809                 r = strv_consume(sv, word);
 810                 if (r < 0)
 811                         return log_oom();
 812         }
 813
 814         return 0;
 815 }
 816
 817 #if 0 /// UNNEEDED by elogind
 818 int config_parse_log_facility(
 819                 const char *unit,
 820                 const char *filename,
 821                 unsigned line,
 822                 const char *section,
 823                 unsigned section_line,
 824                 const char *lvalue,
 825                 int ltype,
 826                 const char *rvalue,
 827                 void *data,
 828                 void *userdata) {
 829
 830
 831         int *o = data, x;
 832
 833         assert(filename);
 834         assert(lvalue);
 835         assert(rvalue);
 836         assert(data);
 837
 838         x = log_facility_unshifted_from_string(rvalue);
 839         if (x < 0) {
 840                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log facility, ignoring: %s", rvalue);
 841                 return 0;
 842         }
 843
 844         *o = (x << 3) | LOG_PRI(*o);
 845
 846         return 0;
 847 }
 848 #endif // 0
 849
 850 int config_parse_log_level(
 851                 const char *unit,
 852                 const char *filename,
 853                 unsigned line,
 854                 const char *section,
 855                 unsigned section_line,
 856                 const char *lvalue,
 857                 int ltype,
 858                 const char *rvalue,
 859                 void *data,
 860                 void *userdata) {
 861
 862
 863         int *o = data, x;
 864
 865         assert(filename);
 866         assert(lvalue);
 867         assert(rvalue);
 868         assert(data);
 869
 870         x = log_level_from_string(rvalue);
 871         if (x < 0) {
 872                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log level, ignoring: %s", rvalue);
 873                 return 0;
 874         }
 875
 876         *o = (*o & LOG_FACMASK) | x;
 877         return 0;
 878 }
 879
 880 int config_parse_signal(
 881                 const char *unit,
 882                 const char *filename,
 883                 unsigned line,
 884                 const char *section,
 885                 unsigned section_line,
 886                 const char *lvalue,
 887                 int ltype,
 888                 const char *rvalue,
 889                 void *data,
 890                 void *userdata) {
 891
 892         int *sig = data, r;
 893
 894         assert(filename);
 895         assert(lvalue);
 896         assert(rvalue);
 897         assert(sig);
 898
 899         r = signal_from_string_try_harder(rvalue);
 900         if (r <= 0) {
 901                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse signal name, ignoring: %s", rvalue);
 902                 return 0;
 903         }
 904
 905         *sig = r;
 906         return 0;
 907 }
 908
 909 #if 0 /// UNNEEDED by elogind
 910 int config_parse_personality(
 911                 const char *unit,
 912                 const char *filename,
 913                 unsigned line,
 914                 const char *section,
 915                 unsigned section_line,
 916                 const char *lvalue,
 917                 int ltype,
 918                 const char *rvalue,
 919                 void *data,
 920                 void *userdata) {
 921
 922         unsigned long *personality = data, p;
 923
 924         assert(filename);
 925         assert(lvalue);
 926         assert(rvalue);
 927         assert(personality);
 928
 929         p = personality_from_string(rvalue);
 930         if (p == PERSONALITY_INVALID) {
 931                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse personality, ignoring: %s", rvalue);
 932                 return 0;
 933         }
 934
 935         *personality = p;
 936         return 0;
 937 }
 938
 939 int config_parse_ifname(
 940                 const char *unit,
 941                 const char *filename,
 942                 unsigned line,
 943                 const char *section,
 944                 unsigned section_line,
 945                 const char *lvalue,
 946                 int ltype,
 947                 const char *rvalue,
 948                 void *data,
 949                 void *userdata) {
 950
 951         char **s = data;
 952         int r;
 953
 954         assert(filename);
 955         assert(lvalue);
 956         assert(rvalue);
 957         assert(data);
 958
 959         if (isempty(rvalue)) {
 960                 *s = mfree(*s);
 961                 return 0;
 962         }
 963
 964         if (!ifname_valid(rvalue)) {
 965                 log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue);
 966                 return 0;
 967         }
 968
 969         r = free_and_strdup(s, rvalue);
 970         if (r < 0)
 971                 return log_oom();
 972
 973         return 0;
 974 }
 975 #endif // 0
 976
 977 int config_parse_ip_port(
 978                 const char *unit,
 979                 const char *filename,
 980                 unsigned line,
 981                 const char *section,
 982                 unsigned section_line,
 983                 const char *lvalue,
 984                 int ltype,
 985                 const char *rvalue,
 986                 void *data,
 987                 void *userdata) {
 988
 989         uint16_t *s = data;
 990         uint16_t port;
 991         int r;
 992
 993         assert(filename);
 994         assert(lvalue);
 995         assert(rvalue);
 996         assert(data);
 997
 998         if (isempty(rvalue)) {
 999                 *s = 0;
1000                 return 0;
1001         }
1002
1003         r = parse_ip_port(rvalue, &port);
1004         if (r < 0) {
1005                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse port '%s'.", rvalue);
1006                 return 0;
1007         }
1008
1009         *s = port;
1010
1011         return 0;
1012 }