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, 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 /* Parse each config file in the directories specified as strv. */
 447 int config_parse_many(
 448                 const char *conf_file,
 449                 const char* const* conf_file_dirs,
 450                 const char *dropin_dirname,
 451                 const char *sections,
 452                 ConfigItemLookup lookup,
 453                 const void *table,
 454                 bool relaxed,
 455                 void *userdata) {
 456
 457         _cleanup_strv_free_ char **dropin_dirs = NULL;
 458         _cleanup_strv_free_ char **files = NULL;
 459         const char *suffix;
 460         int r;
 461
 462         suffix = strjoina("/", dropin_dirname);
 463         r = strv_extend_strv_concat(&dropin_dirs, (char**) conf_file_dirs, suffix);
 464         if (r < 0)
 465                 return r;
 466
 467         r = conf_files_list_strv(&files, ".conf", NULL, (const char* const*) dropin_dirs);
 468         if (r < 0)
 469                 return r;
 470
 471         return config_parse_many_files(conf_file, files,
 472                                        sections, lookup, table, relaxed, userdata);
 473 }
 474
 475 #define DEFINE_PARSER(type, vartype, conv_func)                         \
 476         int config_parse_##type(                                        \
 477                         const char *unit,                               \
 478                         const char *filename,                           \
 479                         unsigned line,                                  \
 480                         const char *section,                            \
 481                         unsigned section_line,                          \
 482                         const char *lvalue,                             \
 483                         int ltype,                                      \
 484                         const char *rvalue,                             \
 485                         void *data,                                     \
 486                         void *userdata) {                               \
 487                                                                         \
 488                 vartype *i = data;                                      \
 489                 int r;                                                  \
 490                                                                         \
 491                 assert(filename);                                       \
 492                 assert(lvalue);                                         \
 493                 assert(rvalue);                                         \
 494                 assert(data);                                           \
 495                                                                         \
 496                 r = conv_func(rvalue, i);                               \
 497                 if (r < 0)                                              \
 498                         log_syntax(unit, LOG_ERR, filename, line, r,    \
 499                                    "Failed to parse %s value, ignoring: %s", \
 500                                    #type, rvalue);                      \
 501                                                                         \
 502                 return 0;                                               \
 503         }                                                               \
 504         struct __useless_struct_to_allow_trailing_semicolon__
 505
 506 DEFINE_PARSER(int, int, safe_atoi);
 507 DEFINE_PARSER(long, long, safe_atoli);
 508 DEFINE_PARSER(uint16, uint16_t, safe_atou16);
 509 DEFINE_PARSER(uint32, uint32_t, safe_atou32);
 510 DEFINE_PARSER(uint64, uint64_t, safe_atou64);
 511 DEFINE_PARSER(unsigned, unsigned, safe_atou);
 512 DEFINE_PARSER(double, double, safe_atod);
 513 #if 0 /// UNNEEDED by elogind
 514 DEFINE_PARSER(nsec, nsec_t, parse_nsec);
 515 #endif // 0
 516 DEFINE_PARSER(sec, usec_t, parse_sec);
 517 DEFINE_PARSER(mode, mode_t, parse_mode);
 518
 519 int config_parse_iec_size(const char* unit,
 520                             const char *filename,
 521                             unsigned line,
 522                             const char *section,
 523                             unsigned section_line,
 524                             const char *lvalue,
 525                             int ltype,
 526                             const char *rvalue,
 527                             void *data,
 528                             void *userdata) {
 529
 530         size_t *sz = data;
 531         uint64_t v;
 532         int r;
 533
 534         assert(filename);
 535         assert(lvalue);
 536         assert(rvalue);
 537         assert(data);
 538
 539         r = parse_size(rvalue, 1024, &v);
 540         if (r < 0 || (uint64_t) (size_t) v != v) {
 541                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 542                 return 0;
 543         }
 544
 545         *sz = (size_t) v;
 546         return 0;
 547 }
 548
 549 #if 0 /// UNNEEDED by elogind
 550 int config_parse_si_size(const char* unit,
 551                             const char *filename,
 552                             unsigned line,
 553                             const char *section,
 554                             unsigned section_line,
 555                             const char *lvalue,
 556                             int ltype,
 557                             const char *rvalue,
 558                             void *data,
 559                             void *userdata) {
 560
 561         size_t *sz = data;
 562         uint64_t v;
 563         int r;
 564
 565         assert(filename);
 566         assert(lvalue);
 567         assert(rvalue);
 568         assert(data);
 569
 570         r = parse_size(rvalue, 1000, &v);
 571         if (r < 0 || (uint64_t) (size_t) v != v) {
 572                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 573                 return 0;
 574         }
 575
 576         *sz = (size_t) v;
 577         return 0;
 578 }
 579
 580 int config_parse_iec_uint64(const char* unit,
 581                            const char *filename,
 582                            unsigned line,
 583                            const char *section,
 584                            unsigned section_line,
 585                            const char *lvalue,
 586                            int ltype,
 587                            const char *rvalue,
 588                            void *data,
 589                            void *userdata) {
 590
 591         uint64_t *bytes = data;
 592         int r;
 593
 594         assert(filename);
 595         assert(lvalue);
 596         assert(rvalue);
 597         assert(data);
 598
 599         r = parse_size(rvalue, 1024, bytes);
 600         if (r < 0)
 601                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 602
 603         return 0;
 604 }
 605 #endif // 0
 606
 607 int config_parse_bool(const char* unit,
 608                       const char *filename,
 609                       unsigned line,
 610                       const char *section,
 611                       unsigned section_line,
 612                       const char *lvalue,
 613                       int ltype,
 614                       const char *rvalue,
 615                       void *data,
 616                       void *userdata) {
 617
 618         int k;
 619         bool *b = data;
 620
 621         assert(filename);
 622         assert(lvalue);
 623         assert(rvalue);
 624         assert(data);
 625
 626         k = parse_boolean(rvalue);
 627         if (k < 0) {
 628                 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
 629                 return 0;
 630         }
 631
 632         *b = !!k;
 633         return 0;
 634 }
 635
 636 #if 0 /// UNNEEDED by elogind
 637 int config_parse_tristate(
 638                 const char* unit,
 639                 const char *filename,
 640                 unsigned line,
 641                 const char *section,
 642                 unsigned section_line,
 643                 const char *lvalue,
 644                 int ltype,
 645                 const char *rvalue,
 646                 void *data,
 647                 void *userdata) {
 648
 649         int k, *t = data;
 650
 651         assert(filename);
 652         assert(lvalue);
 653         assert(rvalue);
 654         assert(data);
 655
 656         /* A tristate is pretty much a boolean, except that it can
 657          * also take the special value -1, indicating "uninitialized",
 658          * much like NULL is for a pointer type. */
 659
 660         k = parse_boolean(rvalue);
 661         if (k < 0) {
 662                 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
 663                 return 0;
 664         }
 665
 666         *t = !!k;
 667         return 0;
 668 }
 669 #endif // 0
 670
 671 int config_parse_string(
 672                 const char *unit,
 673                 const char *filename,
 674                 unsigned line,
 675                 const char *section,
 676                 unsigned section_line,
 677                 const char *lvalue,
 678                 int ltype,
 679                 const char *rvalue,
 680                 void *data,
 681                 void *userdata) {
 682
 683         char **s = data, *n;
 684
 685         assert(filename);
 686         assert(lvalue);
 687         assert(rvalue);
 688         assert(data);
 689
 690         if (!utf8_is_valid(rvalue)) {
 691                 log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 692                 return 0;
 693         }
 694
 695         if (isempty(rvalue))
 696                 n = NULL;
 697         else {
 698                 n = strdup(rvalue);
 699                 if (!n)
 700                         return log_oom();
 701         }
 702
 703         free(*s);
 704         *s = n;
 705
 706         return 0;
 707 }
 708
 709 int config_parse_path(
 710                 const char *unit,
 711                 const char *filename,
 712                 unsigned line,
 713                 const char *section,
 714                 unsigned section_line,
 715                 const char *lvalue,
 716                 int ltype,
 717                 const char *rvalue,
 718                 void *data,
 719                 void *userdata) {
 720
 721         char **s = data, *n;
 722
 723         assert(filename);
 724         assert(lvalue);
 725         assert(rvalue);
 726         assert(data);
 727
 728         if (!utf8_is_valid(rvalue)) {
 729                 log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 730                 return 0;
 731         }
 732
 733         if (!path_is_absolute(rvalue)) {
 734                 log_syntax(unit, LOG_ERR, filename, line, 0, "Not an absolute path, ignoring: %s", rvalue);
 735                 return 0;
 736         }
 737
 738         n = strdup(rvalue);
 739         if (!n)
 740                 return log_oom();
 741
 742         path_kill_slashes(n);
 743
 744         free(*s);
 745         *s = n;
 746
 747         return 0;
 748 }
 749
 750 int config_parse_strv(const char *unit,
 751                       const char *filename,
 752                       unsigned line,
 753                       const char *section,
 754                       unsigned section_line,
 755                       const char *lvalue,
 756                       int ltype,
 757                       const char *rvalue,
 758                       void *data,
 759                       void *userdata) {
 760
 761         char ***sv = data;
 762         int r;
 763
 764         assert(filename);
 765         assert(lvalue);
 766         assert(rvalue);
 767         assert(data);
 768
 769         if (isempty(rvalue)) {
 770                 char **empty;
 771
 772                 /* Empty assignment resets the list. As a special rule
 773                  * we actually fill in a real empty array here rather
 774                  * than NULL, since some code wants to know if
 775                  * something was set at all... */
 776                 empty = new0(char*, 1);
 777                 if (!empty)
 778                         return log_oom();
 779
 780                 strv_free(*sv);
 781                 *sv = empty;
 782
 783                 return 0;
 784         }
 785
 786         for (;;) {
 787                 char *word = NULL;
 788
 789                 r = extract_first_word(&rvalue, &word, WHITESPACE, EXTRACT_QUOTES|EXTRACT_RETAIN_ESCAPE);
 790                 if (r == 0)
 791                         break;
 792                 if (r == -ENOMEM)
 793                         return log_oom();
 794                 if (r < 0) {
 795                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
 796                         break;
 797                 }
 798
 799                 if (!utf8_is_valid(word)) {
 800                         log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 801                         free(word);
 802                         continue;
 803                 }
 804                 r = strv_consume(sv, word);
 805                 if (r < 0)
 806                         return log_oom();
 807         }
 808
 809         return 0;
 810 }
 811
 812 #if 0 /// UNNEEDED by elogind
 813 int config_parse_log_facility(
 814                 const char *unit,
 815                 const char *filename,
 816                 unsigned line,
 817                 const char *section,
 818                 unsigned section_line,
 819                 const char *lvalue,
 820                 int ltype,
 821                 const char *rvalue,
 822                 void *data,
 823                 void *userdata) {
 824
 825
 826         int *o = data, x;
 827
 828         assert(filename);
 829         assert(lvalue);
 830         assert(rvalue);
 831         assert(data);
 832
 833         x = log_facility_unshifted_from_string(rvalue);
 834         if (x < 0) {
 835                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log facility, ignoring: %s", rvalue);
 836                 return 0;
 837         }
 838
 839         *o = (x << 3) | LOG_PRI(*o);
 840
 841         return 0;
 842 }
 843 #endif // 0
 844
 845 int config_parse_log_level(
 846                 const char *unit,
 847                 const char *filename,
 848                 unsigned line,
 849                 const char *section,
 850                 unsigned section_line,
 851                 const char *lvalue,
 852                 int ltype,
 853                 const char *rvalue,
 854                 void *data,
 855                 void *userdata) {
 856
 857
 858         int *o = data, x;
 859
 860         assert(filename);
 861         assert(lvalue);
 862         assert(rvalue);
 863         assert(data);
 864
 865         x = log_level_from_string(rvalue);
 866         if (x < 0) {
 867                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log level, ignoring: %s", rvalue);
 868                 return 0;
 869         }
 870
 871         *o = (*o & LOG_FACMASK) | x;
 872         return 0;
 873 }
 874
 875 int config_parse_signal(
 876                 const char *unit,
 877                 const char *filename,
 878                 unsigned line,
 879                 const char *section,
 880                 unsigned section_line,
 881                 const char *lvalue,
 882                 int ltype,
 883                 const char *rvalue,
 884                 void *data,
 885                 void *userdata) {
 886
 887         int *sig = data, r;
 888
 889         assert(filename);
 890         assert(lvalue);
 891         assert(rvalue);
 892         assert(sig);
 893
 894         r = signal_from_string_try_harder(rvalue);
 895         if (r <= 0) {
 896                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse signal name, ignoring: %s", rvalue);
 897                 return 0;
 898         }
 899
 900         *sig = r;
 901         return 0;
 902 }
 903
 904 #if 0 /// UNNEEDED by elogind
 905 int config_parse_personality(
 906                 const char *unit,
 907                 const char *filename,
 908                 unsigned line,
 909                 const char *section,
 910                 unsigned section_line,
 911                 const char *lvalue,
 912                 int ltype,
 913                 const char *rvalue,
 914                 void *data,
 915                 void *userdata) {
 916
 917         unsigned long *personality = data, p;
 918
 919         assert(filename);
 920         assert(lvalue);
 921         assert(rvalue);
 922         assert(personality);
 923
 924         p = personality_from_string(rvalue);
 925         if (p == PERSONALITY_INVALID) {
 926                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse personality, ignoring: %s", rvalue);
 927                 return 0;
 928         }
 929
 930         *personality = p;
 931         return 0;
 932 }
 933
 934 int config_parse_ifname(
 935                 const char *unit,
 936                 const char *filename,
 937                 unsigned line,
 938                 const char *section,
 939                 unsigned section_line,
 940                 const char *lvalue,
 941                 int ltype,
 942                 const char *rvalue,
 943                 void *data,
 944                 void *userdata) {
 945
 946         char **s = data;
 947         int r;
 948
 949         assert(filename);
 950         assert(lvalue);
 951         assert(rvalue);
 952         assert(data);
 953
 954         if (isempty(rvalue)) {
 955                 *s = mfree(*s);
 956                 return 0;
 957         }
 958
 959         if (!ifname_valid(rvalue)) {
 960                 log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue);
 961                 return 0;
 962         }
 963
 964         r = free_and_strdup(s, rvalue);
 965         if (r < 0)
 966                 return log_oom();
 967
 968         return 0;
 969 }
 970 #endif // 0