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 /* Parse each config file in the specified directories. */
 399 int config_parse_many(const char *conf_file,
 400                       const char *conf_file_dirs,
 401                       const char *sections,
 402                       ConfigItemLookup lookup,
 403                       const void *table,
 404                       bool relaxed,
 405                       void *userdata) {
 406         _cleanup_strv_free_ char **files = NULL;
 407         char **fn;
 408         int r;
 409
 410         r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs);
 411         if (r < 0)
 412                 return r;
 413
 414         if (conf_file) {
 415                 r = config_parse(NULL, conf_file, NULL, sections, lookup, table, relaxed, false, true, userdata);
 416                 if (r < 0)
 417                         return r;
 418         }
 419
 420         STRV_FOREACH(fn, files) {
 421                 r = config_parse(NULL, *fn, NULL, sections, lookup, table, relaxed, false, true, userdata);
 422                 if (r < 0)
 423                         return r;
 424         }
 425
 426         return 0;
 427 }
 428
 429 #define DEFINE_PARSER(type, vartype, conv_func)                         \
 430         int config_parse_##type(                                        \
 431                         const char *unit,                               \
 432                         const char *filename,                           \
 433                         unsigned line,                                  \
 434                         const char *section,                            \
 435                         unsigned section_line,                          \
 436                         const char *lvalue,                             \
 437                         int ltype,                                      \
 438                         const char *rvalue,                             \
 439                         void *data,                                     \
 440                         void *userdata) {                               \
 441                                                                         \
 442                 vartype *i = data;                                      \
 443                 int r;                                                  \
 444                                                                         \
 445                 assert(filename);                                       \
 446                 assert(lvalue);                                         \
 447                 assert(rvalue);                                         \
 448                 assert(data);                                           \
 449                                                                         \
 450                 r = conv_func(rvalue, i);                               \
 451                 if (r < 0)                                              \
 452                         log_syntax(unit, LOG_ERR, filename, line, r,    \
 453                                    "Failed to parse %s value, ignoring: %s", \
 454                                    #type, rvalue);                      \
 455                                                                         \
 456                 return 0;                                               \
 457         }                                                               \
 458         struct __useless_struct_to_allow_trailing_semicolon__
 459
 460 DEFINE_PARSER(int, int, safe_atoi);
 461 DEFINE_PARSER(long, long, safe_atoli);
 462 DEFINE_PARSER(uint32, uint32_t, safe_atou32);
 463 DEFINE_PARSER(uint64, uint64_t, safe_atou64);
 464 DEFINE_PARSER(unsigned, unsigned, safe_atou);
 465 DEFINE_PARSER(double, double, safe_atod);
 466 #if 0 /// UNNEEDED by elogind
 467 DEFINE_PARSER(nsec, nsec_t, parse_nsec);
 468 #endif // 0
 469 DEFINE_PARSER(sec, usec_t, parse_sec);
 470 DEFINE_PARSER(mode, mode_t, parse_mode);
 471
 472 int config_parse_iec_size(const char* unit,
 473                             const char *filename,
 474                             unsigned line,
 475                             const char *section,
 476                             unsigned section_line,
 477                             const char *lvalue,
 478                             int ltype,
 479                             const char *rvalue,
 480                             void *data,
 481                             void *userdata) {
 482
 483         size_t *sz = data;
 484         uint64_t v;
 485         int r;
 486
 487         assert(filename);
 488         assert(lvalue);
 489         assert(rvalue);
 490         assert(data);
 491
 492         r = parse_size(rvalue, 1024, &v);
 493         if (r < 0 || (uint64_t) (size_t) v != v) {
 494                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 495                 return 0;
 496         }
 497
 498         *sz = (size_t) v;
 499         return 0;
 500 }
 501
 502 #if 0 /// UNNEEDED by elogind
 503 int config_parse_si_size(const char* unit,
 504                             const char *filename,
 505                             unsigned line,
 506                             const char *section,
 507                             unsigned section_line,
 508                             const char *lvalue,
 509                             int ltype,
 510                             const char *rvalue,
 511                             void *data,
 512                             void *userdata) {
 513
 514         size_t *sz = data;
 515         uint64_t v;
 516         int r;
 517
 518         assert(filename);
 519         assert(lvalue);
 520         assert(rvalue);
 521         assert(data);
 522
 523         r = parse_size(rvalue, 1000, &v);
 524         if (r < 0 || (uint64_t) (size_t) v != v) {
 525                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 526                 return 0;
 527         }
 528
 529         *sz = (size_t) v;
 530         return 0;
 531 }
 532
 533 int config_parse_iec_uint64(const char* unit,
 534                            const char *filename,
 535                            unsigned line,
 536                            const char *section,
 537                            unsigned section_line,
 538                            const char *lvalue,
 539                            int ltype,
 540                            const char *rvalue,
 541                            void *data,
 542                            void *userdata) {
 543
 544         uint64_t *bytes = data;
 545         int r;
 546
 547         assert(filename);
 548         assert(lvalue);
 549         assert(rvalue);
 550         assert(data);
 551
 552         r = parse_size(rvalue, 1024, bytes);
 553         if (r < 0)
 554                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 555
 556         return 0;
 557 }
 558 #endif // 0
 559
 560 int config_parse_bool(const char* unit,
 561                       const char *filename,
 562                       unsigned line,
 563                       const char *section,
 564                       unsigned section_line,
 565                       const char *lvalue,
 566                       int ltype,
 567                       const char *rvalue,
 568                       void *data,
 569                       void *userdata) {
 570
 571         int k;
 572         bool *b = data;
 573
 574         assert(filename);
 575         assert(lvalue);
 576         assert(rvalue);
 577         assert(data);
 578
 579         k = parse_boolean(rvalue);
 580         if (k < 0) {
 581                 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
 582                 return 0;
 583         }
 584
 585         *b = !!k;
 586         return 0;
 587 }
 588
 589 #if 0 /// UNNEEDED by elogind
 590 int config_parse_tristate(
 591                 const char* unit,
 592                 const char *filename,
 593                 unsigned line,
 594                 const char *section,
 595                 unsigned section_line,
 596                 const char *lvalue,
 597                 int ltype,
 598                 const char *rvalue,
 599                 void *data,
 600                 void *userdata) {
 601
 602         int k, *t = data;
 603
 604         assert(filename);
 605         assert(lvalue);
 606         assert(rvalue);
 607         assert(data);
 608
 609         /* A tristate is pretty much a boolean, except that it can
 610          * also take the special value -1, indicating "uninitialized",
 611          * much like NULL is for a pointer type. */
 612
 613         k = parse_boolean(rvalue);
 614         if (k < 0) {
 615                 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
 616                 return 0;
 617         }
 618
 619         *t = !!k;
 620         return 0;
 621 }
 622 #endif // 0
 623
 624 int config_parse_string(
 625                 const char *unit,
 626                 const char *filename,
 627                 unsigned line,
 628                 const char *section,
 629                 unsigned section_line,
 630                 const char *lvalue,
 631                 int ltype,
 632                 const char *rvalue,
 633                 void *data,
 634                 void *userdata) {
 635
 636         char **s = data, *n;
 637
 638         assert(filename);
 639         assert(lvalue);
 640         assert(rvalue);
 641         assert(data);
 642
 643         if (!utf8_is_valid(rvalue)) {
 644                 log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 645                 return 0;
 646         }
 647
 648         if (isempty(rvalue))
 649                 n = NULL;
 650         else {
 651                 n = strdup(rvalue);
 652                 if (!n)
 653                         return log_oom();
 654         }
 655
 656         free(*s);
 657         *s = n;
 658
 659         return 0;
 660 }
 661
 662 int config_parse_path(
 663                 const char *unit,
 664                 const char *filename,
 665                 unsigned line,
 666                 const char *section,
 667                 unsigned section_line,
 668                 const char *lvalue,
 669                 int ltype,
 670                 const char *rvalue,
 671                 void *data,
 672                 void *userdata) {
 673
 674         char **s = data, *n;
 675
 676         assert(filename);
 677         assert(lvalue);
 678         assert(rvalue);
 679         assert(data);
 680
 681         if (!utf8_is_valid(rvalue)) {
 682                 log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 683                 return 0;
 684         }
 685
 686         if (!path_is_absolute(rvalue)) {
 687                 log_syntax(unit, LOG_ERR, filename, line, 0, "Not an absolute path, ignoring: %s", rvalue);
 688                 return 0;
 689         }
 690
 691         n = strdup(rvalue);
 692         if (!n)
 693                 return log_oom();
 694
 695         path_kill_slashes(n);
 696
 697         free(*s);
 698         *s = n;
 699
 700         return 0;
 701 }
 702
 703 int config_parse_strv(const char *unit,
 704                       const char *filename,
 705                       unsigned line,
 706                       const char *section,
 707                       unsigned section_line,
 708                       const char *lvalue,
 709                       int ltype,
 710                       const char *rvalue,
 711                       void *data,
 712                       void *userdata) {
 713
 714         char ***sv = data;
 715         int r;
 716
 717         assert(filename);
 718         assert(lvalue);
 719         assert(rvalue);
 720         assert(data);
 721
 722         if (isempty(rvalue)) {
 723                 char **empty;
 724
 725                 /* Empty assignment resets the list. As a special rule
 726                  * we actually fill in a real empty array here rather
 727                  * than NULL, since some code wants to know if
 728                  * something was set at all... */
 729                 empty = new0(char*, 1);
 730                 if (!empty)
 731                         return log_oom();
 732
 733                 strv_free(*sv);
 734                 *sv = empty;
 735
 736                 return 0;
 737         }
 738
 739         for (;;) {
 740                 char *word = NULL;
 741
 742                 r = extract_first_word(&rvalue, &word, WHITESPACE, EXTRACT_QUOTES|EXTRACT_RETAIN_ESCAPE);
 743                 if (r == 0)
 744                         break;
 745                 if (r == -ENOMEM)
 746                         return log_oom();
 747                 if (r < 0) {
 748                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
 749                         break;
 750                 }
 751
 752                 if (!utf8_is_valid(word)) {
 753                         log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 754                         free(word);
 755                         continue;
 756                 }
 757                 r = strv_consume(sv, word);
 758                 if (r < 0)
 759                         return log_oom();
 760         }
 761
 762         return 0;
 763 }
 764
 765 #if 0 /// UNNEEDED by elogind
 766 int config_parse_log_facility(
 767                 const char *unit,
 768                 const char *filename,
 769                 unsigned line,
 770                 const char *section,
 771                 unsigned section_line,
 772                 const char *lvalue,
 773                 int ltype,
 774                 const char *rvalue,
 775                 void *data,
 776                 void *userdata) {
 777
 778
 779         int *o = data, x;
 780
 781         assert(filename);
 782         assert(lvalue);
 783         assert(rvalue);
 784         assert(data);
 785
 786         x = log_facility_unshifted_from_string(rvalue);
 787         if (x < 0) {
 788                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log facility, ignoring: %s", rvalue);
 789                 return 0;
 790         }
 791
 792         *o = (x << 3) | LOG_PRI(*o);
 793
 794         return 0;
 795 }
 796 #endif // 0
 797
 798 int config_parse_log_level(
 799                 const char *unit,
 800                 const char *filename,
 801                 unsigned line,
 802                 const char *section,
 803                 unsigned section_line,
 804                 const char *lvalue,
 805                 int ltype,
 806                 const char *rvalue,
 807                 void *data,
 808                 void *userdata) {
 809
 810
 811         int *o = data, x;
 812
 813         assert(filename);
 814         assert(lvalue);
 815         assert(rvalue);
 816         assert(data);
 817
 818         x = log_level_from_string(rvalue);
 819         if (x < 0) {
 820                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log level, ignoring: %s", rvalue);
 821                 return 0;
 822         }
 823
 824         *o = (*o & LOG_FACMASK) | x;
 825         return 0;
 826 }
 827
 828 int config_parse_signal(
 829                 const char *unit,
 830                 const char *filename,
 831                 unsigned line,
 832                 const char *section,
 833                 unsigned section_line,
 834                 const char *lvalue,
 835                 int ltype,
 836                 const char *rvalue,
 837                 void *data,
 838                 void *userdata) {
 839
 840         int *sig = data, r;
 841
 842         assert(filename);
 843         assert(lvalue);
 844         assert(rvalue);
 845         assert(sig);
 846
 847         r = signal_from_string_try_harder(rvalue);
 848         if (r <= 0) {
 849                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse signal name, ignoring: %s", rvalue);
 850                 return 0;
 851         }
 852
 853         *sig = r;
 854         return 0;
 855 }
 856
 857 #if 0 /// UNNEEDED by elogind
 858 int config_parse_personality(
 859                 const char *unit,
 860                 const char *filename,
 861                 unsigned line,
 862                 const char *section,
 863                 unsigned section_line,
 864                 const char *lvalue,
 865                 int ltype,
 866                 const char *rvalue,
 867                 void *data,
 868                 void *userdata) {
 869
 870         unsigned long *personality = data, p;
 871
 872         assert(filename);
 873         assert(lvalue);
 874         assert(rvalue);
 875         assert(personality);
 876
 877         p = personality_from_string(rvalue);
 878         if (p == PERSONALITY_INVALID) {
 879                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse personality, ignoring: %s", rvalue);
 880                 return 0;
 881         }
 882
 883         *personality = p;
 884         return 0;
 885 }
 886
 887 int config_parse_ifname(
 888                 const char *unit,
 889                 const char *filename,
 890                 unsigned line,
 891                 const char *section,
 892                 unsigned section_line,
 893                 const char *lvalue,
 894                 int ltype,
 895                 const char *rvalue,
 896                 void *data,
 897                 void *userdata) {
 898
 899         char **s = data;
 900         int r;
 901
 902         assert(filename);
 903         assert(lvalue);
 904         assert(rvalue);
 905         assert(data);
 906
 907         if (isempty(rvalue)) {
 908                 *s = mfree(*s);
 909                 return 0;
 910         }
 911
 912         if (!ifname_valid(rvalue)) {
 913                 log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue);
 914                 return 0;
 915         }
 916
 917         r = free_and_strdup(s, rvalue);
 918         if (r < 0)
 919                 return log_oom();
 920
 921         return 0;
 922 }
 923 #endif // 0