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, NULL);
 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;
 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         while (!feof(f)) {
 318                 char l[LINE_MAX], *p, *c = NULL, *e;
 319                 bool escaped = false;
 320
 321                 if (!fgets(l, sizeof(l), f)) {
 322                         if (feof(f))
 323                                 break;
 324
 325                         log_error_errno(errno, "Failed to read configuration file '%s': %m", filename);
 326                         return -errno;
 327                 }
 328
 329                 truncate_nl(l);
 330
 331                 if (continuation) {
 332                         c = strappend(continuation, l);
 333                         if (!c) {
 334                                 if (warn)
 335                                         log_oom();
 336                                 return -ENOMEM;
 337                         }
 338
 339                         continuation = mfree(continuation);
 340                         p = c;
 341                 } else
 342                         p = l;
 343
 344                 for (e = p; *e; e++) {
 345                         if (escaped)
 346                                 escaped = false;
 347                         else if (*e == '\\')
 348                                 escaped = true;
 349                 }
 350
 351                 if (escaped) {
 352                         *(e-1) = ' ';
 353
 354                         if (c)
 355                                 continuation = c;
 356                         else {
 357                                 continuation = strdup(l);
 358                                 if (!continuation) {
 359                                         if (warn)
 360                                                 log_oom();
 361                                         return -ENOMEM;
 362                                 }
 363                         }
 364
 365                         continue;
 366                 }
 367
 368                 r = parse_line(unit,
 369                                filename,
 370                                ++line,
 371                                sections,
 372                                lookup,
 373                                table,
 374                                relaxed,
 375                                allow_include,
 376                                &section,
 377                                &section_line,
 378                                &section_ignored,
 379                                p,
 380                                userdata);
 381                 free(c);
 382
 383                 if (r < 0) {
 384                         if (warn)
 385                                 log_warning_errno(r, "Failed to parse file '%s': %m",
 386                                                   filename);
 387                         return r;
 388                 }
 389         }
 390
 391         return 0;
 392 }
 393
 394 /* Parse each config file in the specified directories. */
 395 int config_parse_many(const char *conf_file,
 396                       const char *conf_file_dirs,
 397                       const char *sections,
 398                       ConfigItemLookup lookup,
 399                       const void *table,
 400                       bool relaxed,
 401                       void *userdata) {
 402         _cleanup_strv_free_ char **files = NULL;
 403         char **fn;
 404         int r;
 405
 406         r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs);
 407         if (r < 0)
 408                 return 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 #define DEFINE_PARSER(type, vartype, conv_func)                         \
 426         int config_parse_##type(                                        \
 427                         const char *unit,                               \
 428                         const char *filename,                           \
 429                         unsigned line,                                  \
 430                         const char *section,                            \
 431                         unsigned section_line,                          \
 432                         const char *lvalue,                             \
 433                         int ltype,                                      \
 434                         const char *rvalue,                             \
 435                         void *data,                                     \
 436                         void *userdata) {                               \
 437                                                                         \
 438                 vartype *i = data;                                      \
 439                 int r;                                                  \
 440                                                                         \
 441                 assert(filename);                                       \
 442                 assert(lvalue);                                         \
 443                 assert(rvalue);                                         \
 444                 assert(data);                                           \
 445                                                                         \
 446                 r = conv_func(rvalue, i);                               \
 447                 if (r < 0)                                              \
 448                         log_syntax(unit, LOG_ERR, filename, line, r,    \
 449                                    "Failed to parse %s value, ignoring: %s", \
 450                                    #type, rvalue);                      \
 451                                                                         \
 452                 return 0;                                               \
 453         }                                                               \
 454         struct __useless_struct_to_allow_trailing_semicolon__
 455
 456 DEFINE_PARSER(int, int, safe_atoi);
 457 DEFINE_PARSER(long, long, safe_atoli);
 458 DEFINE_PARSER(uint32, uint32_t, safe_atou32);
 459 DEFINE_PARSER(uint64, uint64_t, safe_atou64);
 460 DEFINE_PARSER(unsigned, unsigned, safe_atou);
 461 DEFINE_PARSER(double, double, safe_atod);
 462 DEFINE_PARSER(nsec, nsec_t, parse_nsec);
 463 DEFINE_PARSER(sec, usec_t, parse_sec);
 464 DEFINE_PARSER(mode, mode_t, parse_mode);
 465
 466 int config_parse_iec_size(const char* unit,
 467                             const char *filename,
 468                             unsigned line,
 469                             const char *section,
 470                             unsigned section_line,
 471                             const char *lvalue,
 472                             int ltype,
 473                             const char *rvalue,
 474                             void *data,
 475                             void *userdata) {
 476
 477         size_t *sz = data;
 478         uint64_t v;
 479         int r;
 480
 481         assert(filename);
 482         assert(lvalue);
 483         assert(rvalue);
 484         assert(data);
 485
 486         r = parse_size(rvalue, 1024, &v);
 487         if (r < 0 || (uint64_t) (size_t) v != v) {
 488                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 489                 return 0;
 490         }
 491
 492         *sz = (size_t) v;
 493         return 0;
 494 }
 495
 496 int config_parse_si_size(const char* unit,
 497                             const char *filename,
 498                             unsigned line,
 499                             const char *section,
 500                             unsigned section_line,
 501                             const char *lvalue,
 502                             int ltype,
 503                             const char *rvalue,
 504                             void *data,
 505                             void *userdata) {
 506
 507         size_t *sz = data;
 508         uint64_t v;
 509         int r;
 510
 511         assert(filename);
 512         assert(lvalue);
 513         assert(rvalue);
 514         assert(data);
 515
 516         r = parse_size(rvalue, 1000, &v);
 517         if (r < 0 || (uint64_t) (size_t) v != v) {
 518                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 519                 return 0;
 520         }
 521
 522         *sz = (size_t) v;
 523         return 0;
 524 }
 525
 526 int config_parse_iec_uint64(const char* unit,
 527                            const char *filename,
 528                            unsigned line,
 529                            const char *section,
 530                            unsigned section_line,
 531                            const char *lvalue,
 532                            int ltype,
 533                            const char *rvalue,
 534                            void *data,
 535                            void *userdata) {
 536
 537         uint64_t *bytes = data;
 538         int r;
 539
 540         assert(filename);
 541         assert(lvalue);
 542         assert(rvalue);
 543         assert(data);
 544
 545         r = parse_size(rvalue, 1024, bytes);
 546         if (r < 0)
 547                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 548
 549         return 0;
 550 }
 551
 552 int config_parse_bool(const char* unit,
 553                       const char *filename,
 554                       unsigned line,
 555                       const char *section,
 556                       unsigned section_line,
 557                       const char *lvalue,
 558                       int ltype,
 559                       const char *rvalue,
 560                       void *data,
 561                       void *userdata) {
 562
 563         int k;
 564         bool *b = data;
 565
 566         assert(filename);
 567         assert(lvalue);
 568         assert(rvalue);
 569         assert(data);
 570
 571         k = parse_boolean(rvalue);
 572         if (k < 0) {
 573                 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
 574                 return 0;
 575         }
 576
 577         *b = !!k;
 578         return 0;
 579 }
 580
 581 int config_parse_tristate(
 582                 const char* unit,
 583                 const char *filename,
 584                 unsigned line,
 585                 const char *section,
 586                 unsigned section_line,
 587                 const char *lvalue,
 588                 int ltype,
 589                 const char *rvalue,
 590                 void *data,
 591                 void *userdata) {
 592
 593         int k, *t = data;
 594
 595         assert(filename);
 596         assert(lvalue);
 597         assert(rvalue);
 598         assert(data);
 599
 600         /* A tristate is pretty much a boolean, except that it can
 601          * also take the special value -1, indicating "uninitialized",
 602          * much like NULL is for a pointer type. */
 603
 604         k = parse_boolean(rvalue);
 605         if (k < 0) {
 606                 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
 607                 return 0;
 608         }
 609
 610         *t = !!k;
 611         return 0;
 612 }
 613
 614 int config_parse_string(
 615                 const char *unit,
 616                 const char *filename,
 617                 unsigned line,
 618                 const char *section,
 619                 unsigned section_line,
 620                 const char *lvalue,
 621                 int ltype,
 622                 const char *rvalue,
 623                 void *data,
 624                 void *userdata) {
 625
 626         char **s = data, *n;
 627
 628         assert(filename);
 629         assert(lvalue);
 630         assert(rvalue);
 631         assert(data);
 632
 633         if (!utf8_is_valid(rvalue)) {
 634                 log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 635                 return 0;
 636         }
 637
 638         if (isempty(rvalue))
 639                 n = NULL;
 640         else {
 641                 n = strdup(rvalue);
 642                 if (!n)
 643                         return log_oom();
 644         }
 645
 646         free(*s);
 647         *s = n;
 648
 649         return 0;
 650 }
 651
 652 int config_parse_path(
 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         char **s = data, *n;
 665
 666         assert(filename);
 667         assert(lvalue);
 668         assert(rvalue);
 669         assert(data);
 670
 671         if (!utf8_is_valid(rvalue)) {
 672                 log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 673                 return 0;
 674         }
 675
 676         if (!path_is_absolute(rvalue)) {
 677                 log_syntax(unit, LOG_ERR, filename, line, 0, "Not an absolute path, ignoring: %s", rvalue);
 678                 return 0;
 679         }
 680
 681         n = strdup(rvalue);
 682         if (!n)
 683                 return log_oom();
 684
 685         path_kill_slashes(n);
 686
 687         free(*s);
 688         *s = n;
 689
 690         return 0;
 691 }
 692
 693 int config_parse_strv(const char *unit,
 694                       const char *filename,
 695                       unsigned line,
 696                       const char *section,
 697                       unsigned section_line,
 698                       const char *lvalue,
 699                       int ltype,
 700                       const char *rvalue,
 701                       void *data,
 702                       void *userdata) {
 703
 704         char ***sv = data;
 705
 706         assert(filename);
 707         assert(lvalue);
 708         assert(rvalue);
 709         assert(data);
 710
 711         if (isempty(rvalue)) {
 712                 char **empty;
 713
 714                 /* Empty assignment resets the list. As a special rule
 715                  * we actually fill in a real empty array here rather
 716                  * than NULL, since some code wants to know if
 717                  * something was set at all... */
 718                 empty = strv_new(NULL, NULL);
 719                 if (!empty)
 720                         return log_oom();
 721
 722                 strv_free(*sv);
 723                 *sv = empty;
 724                 return 0;
 725         }
 726
 727         for (;;) {
 728                 char *word = NULL;
 729                 int r;
 730                 r = extract_first_word(&rvalue, &word, WHITESPACE, EXTRACT_QUOTES);
 731                 if (r == 0)
 732                         break;
 733                 if (r == -ENOMEM)
 734                         return log_oom();
 735                 if (r < 0) {
 736                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
 737                         break;
 738                 }
 739
 740                 if (!utf8_is_valid(word)) {
 741                         log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 742                         free(word);
 743                         continue;
 744                 }
 745                 r = strv_consume(sv, word);
 746                 if (r < 0)
 747                         return log_oom();
 748         }
 749
 750         return 0;
 751 }
 752
 753 int config_parse_log_facility(
 754                 const char *unit,
 755                 const char *filename,
 756                 unsigned line,
 757                 const char *section,
 758                 unsigned section_line,
 759                 const char *lvalue,
 760                 int ltype,
 761                 const char *rvalue,
 762                 void *data,
 763                 void *userdata) {
 764
 765
 766         int *o = data, x;
 767
 768         assert(filename);
 769         assert(lvalue);
 770         assert(rvalue);
 771         assert(data);
 772
 773         x = log_facility_unshifted_from_string(rvalue);
 774         if (x < 0) {
 775                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log facility, ignoring: %s", rvalue);
 776                 return 0;
 777         }
 778
 779         *o = (x << 3) | LOG_PRI(*o);
 780
 781         return 0;
 782 }
 783
 784 int config_parse_log_level(
 785                 const char *unit,
 786                 const char *filename,
 787                 unsigned line,
 788                 const char *section,
 789                 unsigned section_line,
 790                 const char *lvalue,
 791                 int ltype,
 792                 const char *rvalue,
 793                 void *data,
 794                 void *userdata) {
 795
 796
 797         int *o = data, x;
 798
 799         assert(filename);
 800         assert(lvalue);
 801         assert(rvalue);
 802         assert(data);
 803
 804         x = log_level_from_string(rvalue);
 805         if (x < 0) {
 806                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log level, ignoring: %s", rvalue);
 807                 return 0;
 808         }
 809
 810         *o = (*o & LOG_FACMASK) | x;
 811         return 0;
 812 }
 813
 814 int config_parse_signal(
 815                 const char *unit,
 816                 const char *filename,
 817                 unsigned line,
 818                 const char *section,
 819                 unsigned section_line,
 820                 const char *lvalue,
 821                 int ltype,
 822                 const char *rvalue,
 823                 void *data,
 824                 void *userdata) {
 825
 826         int *sig = data, r;
 827
 828         assert(filename);
 829         assert(lvalue);
 830         assert(rvalue);
 831         assert(sig);
 832
 833         r = signal_from_string_try_harder(rvalue);
 834         if (r <= 0) {
 835                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse signal name, ignoring: %s", rvalue);
 836                 return 0;
 837         }
 838
 839         *sig = r;
 840         return 0;
 841 }
 842
 843 int config_parse_personality(
 844                 const char *unit,
 845                 const char *filename,
 846                 unsigned line,
 847                 const char *section,
 848                 unsigned section_line,
 849                 const char *lvalue,
 850                 int ltype,
 851                 const char *rvalue,
 852                 void *data,
 853                 void *userdata) {
 854
 855         unsigned long *personality = data, p;
 856
 857         assert(filename);
 858         assert(lvalue);
 859         assert(rvalue);
 860         assert(personality);
 861
 862         p = personality_from_string(rvalue);
 863         if (p == PERSONALITY_INVALID) {
 864                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse personality, ignoring: %s", rvalue);
 865                 return 0;
 866         }
 867
 868         *personality = p;
 869         return 0;
 870 }