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 "socket-util.h"
  41 #include "string-util.h"
  42 #include "strv.h"
  43 #include "syslog-util.h"
  44 #include "time-util.h"
  45 #include "utf8.h"
  46
  47 int config_item_table_lookup(
  48                 const void *table,
  49                 const char *section,
  50                 const char *lvalue,
  51                 ConfigParserCallback *func,
  52                 int *ltype,
  53                 void **data,
  54                 void *userdata) {
  55
  56         const ConfigTableItem *t;
  57
  58         assert(table);
  59         assert(lvalue);
  60         assert(func);
  61         assert(ltype);
  62         assert(data);
  63
  64         for (t = table; t->lvalue; t++) {
  65
  66                 if (!streq(lvalue, t->lvalue))
  67                         continue;
  68
  69                 if (!streq_ptr(section, t->section))
  70                         continue;
  71
  72                 *func = t->parse;
  73                 *ltype = t->ltype;
  74                 *data = t->data;
  75                 return 1;
  76         }
  77
  78         return 0;
  79 }
  80
  81 int config_item_perf_lookup(
  82                 const void *table,
  83                 const char *section,
  84                 const char *lvalue,
  85                 ConfigParserCallback *func,
  86                 int *ltype,
  87                 void **data,
  88                 void *userdata) {
  89
  90         ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
  91         const ConfigPerfItem *p;
  92
  93         assert(table);
  94         assert(lvalue);
  95         assert(func);
  96         assert(ltype);
  97         assert(data);
  98
  99         if (!section)
 100                 p = lookup(lvalue, strlen(lvalue));
 101         else {
 102                 char *key;
 103
 104                 key = strjoin(section, ".", lvalue);
 105                 if (!key)
 106                         return -ENOMEM;
 107
 108                 p = lookup(key, strlen(key));
 109                 free(key);
 110         }
 111
 112         if (!p)
 113                 return 0;
 114
 115         *func = p->parse;
 116         *ltype = p->ltype;
 117         *data = (uint8_t*) userdata + p->offset;
 118         return 1;
 119 }
 120
 121 /* Run the user supplied parser for an assignment */
 122 static int next_assignment(const char *unit,
 123                            const char *filename,
 124                            unsigned line,
 125                            ConfigItemLookup lookup,
 126                            const void *table,
 127                            const char *section,
 128                            unsigned section_line,
 129                            const char *lvalue,
 130                            const char *rvalue,
 131                            bool relaxed,
 132                            void *userdata) {
 133
 134         ConfigParserCallback func = NULL;
 135         int ltype = 0;
 136         void *data = NULL;
 137         int r;
 138
 139         assert(filename);
 140         assert(line > 0);
 141         assert(lookup);
 142         assert(lvalue);
 143         assert(rvalue);
 144
 145         r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
 146         if (r < 0)
 147                 return r;
 148
 149         if (r > 0) {
 150                 if (func)
 151                         return func(unit, filename, line, section, section_line,
 152                                     lvalue, ltype, rvalue, data, userdata);
 153
 154                 return 0;
 155         }
 156
 157         /* Warn about unknown non-extension fields. */
 158         if (!relaxed && !startswith(lvalue, "X-"))
 159                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown lvalue '%s' in section '%s'", lvalue, section);
 160
 161         return 0;
 162 }
 163
 164 /* Parse a variable assignment line */
 165 static int parse_line(const char* unit,
 166                       const char *filename,
 167                       unsigned line,
 168                       const char *sections,
 169                       ConfigItemLookup lookup,
 170                       const void *table,
 171                       bool relaxed,
 172                       bool allow_include,
 173                       char **section,
 174                       unsigned *section_line,
 175                       bool *section_ignored,
 176                       char *l,
 177                       void *userdata) {
 178
 179         char *e;
 180
 181         assert(filename);
 182         assert(line > 0);
 183         assert(lookup);
 184         assert(l);
 185
 186         l = strstrip(l);
 187
 188         if (!*l)
 189                 return 0;
 190
 191         if (strchr(COMMENTS "\n", *l))
 192                 return 0;
 193
 194         if (startswith(l, ".include ")) {
 195                 _cleanup_free_ char *fn = NULL;
 196
 197                 /* .includes are a bad idea, we only support them here
 198                  * for historical reasons. They create cyclic include
 199                  * problems and make it difficult to detect
 200                  * configuration file changes with an easy
 201                  * stat(). Better approaches, such as .d/ drop-in
 202                  * snippets exist.
 203                  *
 204                  * Support for them should be eventually removed. */
 205
 206                 if (!allow_include) {
 207                         log_syntax(unit, LOG_ERR, filename, line, 0, ".include not allowed here. Ignoring.");
 208                         return 0;
 209                 }
 210
 211                 fn = file_in_same_dir(filename, strstrip(l+9));
 212                 if (!fn)
 213                         return -ENOMEM;
 214
 215                 return config_parse(unit, fn, NULL, sections, lookup, table, relaxed, false, false, userdata);
 216         }
 217
 218         if (*l == '[') {
 219                 size_t k;
 220                 char *n;
 221
 222                 k = strlen(l);
 223                 assert(k > 0);
 224
 225                 if (l[k-1] != ']') {
 226                         log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid section header '%s'", l);
 227                         return -EBADMSG;
 228                 }
 229
 230                 n = strndup(l+1, k-2);
 231                 if (!n)
 232                         return -ENOMEM;
 233
 234                 if (sections && !nulstr_contains(sections, n)) {
 235
 236                         if (!relaxed && !startswith(n, "X-"))
 237                                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown section '%s'. Ignoring.", n);
 238
 239                         free(n);
 240                         *section = mfree(*section);
 241                         *section_line = 0;
 242                         *section_ignored = true;
 243                 } else {
 244                         free(*section);
 245                         *section = n;
 246                         *section_line = line;
 247                         *section_ignored = false;
 248                 }
 249
 250                 return 0;
 251         }
 252
 253         if (sections && !*section) {
 254
 255                 if (!relaxed && !*section_ignored)
 256                         log_syntax(unit, LOG_WARNING, filename, line, 0, "Assignment outside of section. Ignoring.");
 257
 258                 return 0;
 259         }
 260
 261         e = strchr(l, '=');
 262         if (!e) {
 263                 log_syntax(unit, LOG_WARNING, filename, line, 0, "Missing '='.");
 264                 return -EINVAL;
 265         }
 266
 267         *e = 0;
 268         e++;
 269
 270         return next_assignment(unit,
 271                                filename,
 272                                line,
 273                                lookup,
 274                                table,
 275                                *section,
 276                                *section_line,
 277                                strstrip(l),
 278                                strstrip(e),
 279                                relaxed,
 280                                userdata);
 281 }
 282
 283 /* Go through the file and parse each line */
 284 int config_parse(const char *unit,
 285                  const char *filename,
 286                  FILE *f,
 287                  const char *sections,
 288                  ConfigItemLookup lookup,
 289                  const void *table,
 290                  bool relaxed,
 291                  bool allow_include,
 292                  bool warn,
 293                  void *userdata) {
 294
 295         _cleanup_free_ char *section = NULL, *continuation = NULL;
 296         _cleanup_fclose_ FILE *ours = NULL;
 297         unsigned line = 0, section_line = 0;
 298         bool section_ignored = false, allow_bom = true;
 299         int r;
 300
 301         assert(filename);
 302         assert(lookup);
 303
 304         if (!f) {
 305                 f = ours = fopen(filename, "re");
 306                 if (!f) {
 307                         /* Only log on request, except for ENOENT,
 308                          * since we return 0 to the caller. */
 309                         if (warn || errno == ENOENT)
 310                                 log_full(errno == ENOENT ? LOG_DEBUG : LOG_ERR,
 311                                          "Failed to open configuration file '%s': %m", filename);
 312                         return errno == ENOENT ? 0 : -errno;
 313                 }
 314         }
 315
 316         fd_warn_permissions(filename, fileno(f));
 317
 318         for (;;) {
 319                 char buf[LINE_MAX], *l, *p, *c = NULL, *e;
 320                 bool escaped = false;
 321
 322                 if (!fgets(buf, sizeof buf, f)) {
 323                         if (feof(f))
 324                                 break;
 325
 326                         return log_error_errno(errno, "Failed to read configuration file '%s': %m", filename);
 327                 }
 328
 329                 l = buf;
 330                 if (allow_bom && startswith(l, UTF8_BYTE_ORDER_MARK))
 331                         l += strlen(UTF8_BYTE_ORDER_MARK);
 332                 allow_bom = false;
 333
 334                 truncate_nl(l);
 335
 336                 if (continuation) {
 337                         c = strappend(continuation, l);
 338                         if (!c) {
 339                                 if (warn)
 340                                         log_oom();
 341                                 return -ENOMEM;
 342                         }
 343
 344                         continuation = mfree(continuation);
 345                         p = c;
 346                 } else
 347                         p = l;
 348
 349                 for (e = p; *e; e++) {
 350                         if (escaped)
 351                                 escaped = false;
 352                         else if (*e == '\\')
 353                                 escaped = true;
 354                 }
 355
 356                 if (escaped) {
 357                         *(e-1) = ' ';
 358
 359                         if (c)
 360                                 continuation = c;
 361                         else {
 362                                 continuation = strdup(l);
 363                                 if (!continuation) {
 364                                         if (warn)
 365                                                 log_oom();
 366                                         return -ENOMEM;
 367                                 }
 368                         }
 369
 370                         continue;
 371                 }
 372
 373                 r = parse_line(unit,
 374                                filename,
 375                                ++line,
 376                                sections,
 377                                lookup,
 378                                table,
 379                                relaxed,
 380                                allow_include,
 381                                &section,
 382                                &section_line,
 383                                &section_ignored,
 384                                p,
 385                                userdata);
 386                 free(c);
 387
 388                 if (r < 0) {
 389                         if (warn)
 390                                 log_warning_errno(r, "Failed to parse file '%s': %m",
 391                                                   filename);
 392                         return r;
 393                 }
 394         }
 395
 396         return 0;
 397 }
 398
 399 static int config_parse_many_files(
 400                 const char *conf_file,
 401                 char **files,
 402                 const char *sections,
 403                 ConfigItemLookup lookup,
 404                 const void *table,
 405                 bool relaxed,
 406                 void *userdata) {
 407
 408         char **fn;
 409         int r;
 410
 411         if (conf_file) {
 412                 r = config_parse(NULL, conf_file, NULL, sections, lookup, table, relaxed, false, true, userdata);
 413                 if (r < 0)
 414                         return r;
 415         }
 416
 417         STRV_FOREACH(fn, files) {
 418                 r = config_parse(NULL, *fn, NULL, sections, lookup, table, relaxed, false, true, userdata);
 419                 if (r < 0)
 420                         return r;
 421         }
 422
 423         return 0;
 424 }
 425
 426 /* Parse each config file in the directories specified as nulstr. */
 427 int config_parse_many_nulstr(
 428                 const char *conf_file,
 429                 const char *conf_file_dirs,
 430                 const char *sections,
 431                 ConfigItemLookup lookup,
 432                 const void *table,
 433                 bool relaxed,
 434                 void *userdata) {
 435
 436         _cleanup_strv_free_ char **files = NULL;
 437         int r;
 438
 439         r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs);
 440         if (r < 0)
 441                 return r;
 442
 443         return config_parse_many_files(conf_file, files,
 444                                        sections, lookup, table, relaxed, userdata);
 445 }
 446
 447 /* Parse each config file in the directories specified as strv. */
 448 int config_parse_many(
 449                 const char *conf_file,
 450                 const char* const* conf_file_dirs,
 451                 const char *dropin_dirname,
 452                 const char *sections,
 453                 ConfigItemLookup lookup,
 454                 const void *table,
 455                 bool relaxed,
 456                 void *userdata) {
 457
 458         _cleanup_strv_free_ char **dropin_dirs = NULL;
 459         _cleanup_strv_free_ char **files = NULL;
 460         const char *suffix;
 461         int r;
 462
 463         suffix = strjoina("/", dropin_dirname);
 464         r = strv_extend_strv_concat(&dropin_dirs, (char**) conf_file_dirs, suffix);
 465         if (r < 0)
 466                 return r;
 467
 468         r = conf_files_list_strv(&files, ".conf", NULL, (const char* const*) dropin_dirs);
 469         if (r < 0)
 470                 return r;
 471
 472         return config_parse_many_files(conf_file, files,
 473                                        sections, lookup, table, relaxed, userdata);
 474 }
 475
 476 #define DEFINE_PARSER(type, vartype, conv_func)                         \
 477         int config_parse_##type(                                        \
 478                         const char *unit,                               \
 479                         const char *filename,                           \
 480                         unsigned line,                                  \
 481                         const char *section,                            \
 482                         unsigned section_line,                          \
 483                         const char *lvalue,                             \
 484                         int ltype,                                      \
 485                         const char *rvalue,                             \
 486                         void *data,                                     \
 487                         void *userdata) {                               \
 488                                                                         \
 489                 vartype *i = data;                                      \
 490                 int r;                                                  \
 491                                                                         \
 492                 assert(filename);                                       \
 493                 assert(lvalue);                                         \
 494                 assert(rvalue);                                         \
 495                 assert(data);                                           \
 496                                                                         \
 497                 r = conv_func(rvalue, i);                               \
 498                 if (r < 0)                                              \
 499                         log_syntax(unit, LOG_ERR, filename, line, r,    \
 500                                    "Failed to parse %s value, ignoring: %s", \
 501                                    #type, rvalue);                      \
 502                                                                         \
 503                 return 0;                                               \
 504         }                                                               \
 505         struct __useless_struct_to_allow_trailing_semicolon__
 506
 507 DEFINE_PARSER(int, int, safe_atoi);
 508 DEFINE_PARSER(long, long, safe_atoli);
 509 DEFINE_PARSER(uint8, uint8_t, safe_atou8);
 510 DEFINE_PARSER(uint16, uint16_t, safe_atou16);
 511 DEFINE_PARSER(uint32, uint32_t, safe_atou32);
 512 DEFINE_PARSER(uint64, uint64_t, safe_atou64);
 513 DEFINE_PARSER(unsigned, unsigned, safe_atou);
 514 DEFINE_PARSER(double, double, safe_atod);
 515 DEFINE_PARSER(nsec, nsec_t, parse_nsec);
 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 int config_parse_si_size(const char* unit,
 550                             const char *filename,
 551                             unsigned line,
 552                             const char *section,
 553                             unsigned section_line,
 554                             const char *lvalue,
 555                             int ltype,
 556                             const char *rvalue,
 557                             void *data,
 558                             void *userdata) {
 559
 560         size_t *sz = data;
 561         uint64_t v;
 562         int r;
 563
 564         assert(filename);
 565         assert(lvalue);
 566         assert(rvalue);
 567         assert(data);
 568
 569         r = parse_size(rvalue, 1000, &v);
 570         if (r < 0 || (uint64_t) (size_t) v != v) {
 571                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 572                 return 0;
 573         }
 574
 575         *sz = (size_t) v;
 576         return 0;
 577 }
 578
 579 int config_parse_iec_uint64(const char* unit,
 580                            const char *filename,
 581                            unsigned line,
 582                            const char *section,
 583                            unsigned section_line,
 584                            const char *lvalue,
 585                            int ltype,
 586                            const char *rvalue,
 587                            void *data,
 588                            void *userdata) {
 589
 590         uint64_t *bytes = data;
 591         int r;
 592
 593         assert(filename);
 594         assert(lvalue);
 595         assert(rvalue);
 596         assert(data);
 597
 598         r = parse_size(rvalue, 1024, bytes);
 599         if (r < 0)
 600                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
 601
 602         return 0;
 603 }
 604
 605 int config_parse_bool(const char* unit,
 606                       const char *filename,
 607                       unsigned line,
 608                       const char *section,
 609                       unsigned section_line,
 610                       const char *lvalue,
 611                       int ltype,
 612                       const char *rvalue,
 613                       void *data,
 614                       void *userdata) {
 615
 616         int k;
 617         bool *b = data;
 618
 619         assert(filename);
 620         assert(lvalue);
 621         assert(rvalue);
 622         assert(data);
 623
 624         k = parse_boolean(rvalue);
 625         if (k < 0) {
 626                 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
 627                 return 0;
 628         }
 629
 630         *b = !!k;
 631         return 0;
 632 }
 633
 634 int config_parse_tristate(
 635                 const char* unit,
 636                 const char *filename,
 637                 unsigned line,
 638                 const char *section,
 639                 unsigned section_line,
 640                 const char *lvalue,
 641                 int ltype,
 642                 const char *rvalue,
 643                 void *data,
 644                 void *userdata) {
 645
 646         int k, *t = data;
 647
 648         assert(filename);
 649         assert(lvalue);
 650         assert(rvalue);
 651         assert(data);
 652
 653         /* A tristate is pretty much a boolean, except that it can
 654          * also take the special value -1, indicating "uninitialized",
 655          * much like NULL is for a pointer type. */
 656
 657         k = parse_boolean(rvalue);
 658         if (k < 0) {
 659                 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse boolean value, ignoring: %s", rvalue);
 660                 return 0;
 661         }
 662
 663         *t = !!k;
 664         return 0;
 665 }
 666
 667 int config_parse_string(
 668                 const char *unit,
 669                 const char *filename,
 670                 unsigned line,
 671                 const char *section,
 672                 unsigned section_line,
 673                 const char *lvalue,
 674                 int ltype,
 675                 const char *rvalue,
 676                 void *data,
 677                 void *userdata) {
 678
 679         char **s = data, *n;
 680
 681         assert(filename);
 682         assert(lvalue);
 683         assert(rvalue);
 684         assert(data);
 685
 686         if (!utf8_is_valid(rvalue)) {
 687                 log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 688                 return 0;
 689         }
 690
 691         if (isempty(rvalue))
 692                 n = NULL;
 693         else {
 694                 n = strdup(rvalue);
 695                 if (!n)
 696                         return log_oom();
 697         }
 698
 699         free(*s);
 700         *s = n;
 701
 702         return 0;
 703 }
 704
 705 int config_parse_path(
 706                 const char *unit,
 707                 const char *filename,
 708                 unsigned line,
 709                 const char *section,
 710                 unsigned section_line,
 711                 const char *lvalue,
 712                 int ltype,
 713                 const char *rvalue,
 714                 void *data,
 715                 void *userdata) {
 716
 717         char **s = data, *n;
 718
 719         assert(filename);
 720         assert(lvalue);
 721         assert(rvalue);
 722         assert(data);
 723
 724         if (!utf8_is_valid(rvalue)) {
 725                 log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, rvalue);
 726                 return 0;
 727         }
 728
 729         if (!path_is_absolute(rvalue)) {
 730                 log_syntax(unit, LOG_ERR, filename, line, 0, "Not an absolute path, ignoring: %s", rvalue);
 731                 return 0;
 732         }
 733
 734         n = strdup(rvalue);
 735         if (!n)
 736                 return log_oom();
 737
 738         path_kill_slashes(n);
 739
 740         free(*s);
 741         *s = n;
 742
 743         return 0;
 744 }
 745
 746 int config_parse_strv(const char *unit,
 747                       const char *filename,
 748                       unsigned line,
 749                       const char *section,
 750                       unsigned section_line,
 751                       const char *lvalue,
 752                       int ltype,
 753                       const char *rvalue,
 754                       void *data,
 755                       void *userdata) {
 756
 757         char ***sv = data;
 758         int r;
 759
 760         assert(filename);
 761         assert(lvalue);
 762         assert(rvalue);
 763         assert(data);
 764
 765         if (isempty(rvalue)) {
 766                 char **empty;
 767
 768                 /* Empty assignment resets the list. As a special rule
 769                  * we actually fill in a real empty array here rather
 770                  * than NULL, since some code wants to know if
 771                  * something was set at all... */
 772                 empty = new0(char*, 1);
 773                 if (!empty)
 774                         return log_oom();
 775
 776                 strv_free(*sv);
 777                 *sv = empty;
 778
 779                 return 0;
 780         }
 781
 782         for (;;) {
 783                 char *word = NULL;
 784
 785                 r = extract_first_word(&rvalue, &word, NULL, EXTRACT_QUOTES|EXTRACT_RETAIN_ESCAPE);
 786                 if (r == 0)
 787                         break;
 788                 if (r == -ENOMEM)
 789                         return log_oom();
 790                 if (r < 0) {
 791                         log_syntax(unit, LOG_ERR, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
 792                         break;
 793                 }
 794
 795                 if (!utf8_is_valid(word)) {
 796                         log_syntax_invalid_utf8(unit, LOG_ERR, filename, line, word);
 797                         free(word);
 798                         continue;
 799                 }
 800                 r = strv_consume(sv, word);
 801                 if (r < 0)
 802                         return log_oom();
 803         }
 804
 805         return 0;
 806 }
 807
 808 int config_parse_log_facility(
 809                 const char *unit,
 810                 const char *filename,
 811                 unsigned line,
 812                 const char *section,
 813                 unsigned section_line,
 814                 const char *lvalue,
 815                 int ltype,
 816                 const char *rvalue,
 817                 void *data,
 818                 void *userdata) {
 819
 820
 821         int *o = data, x;
 822
 823         assert(filename);
 824         assert(lvalue);
 825         assert(rvalue);
 826         assert(data);
 827
 828         x = log_facility_unshifted_from_string(rvalue);
 829         if (x < 0) {
 830                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log facility, ignoring: %s", rvalue);
 831                 return 0;
 832         }
 833
 834         *o = (x << 3) | LOG_PRI(*o);
 835
 836         return 0;
 837 }
 838
 839 int config_parse_log_level(
 840                 const char *unit,
 841                 const char *filename,
 842                 unsigned line,
 843                 const char *section,
 844                 unsigned section_line,
 845                 const char *lvalue,
 846                 int ltype,
 847                 const char *rvalue,
 848                 void *data,
 849                 void *userdata) {
 850
 851
 852         int *o = data, x;
 853
 854         assert(filename);
 855         assert(lvalue);
 856         assert(rvalue);
 857         assert(data);
 858
 859         x = log_level_from_string(rvalue);
 860         if (x < 0) {
 861                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse log level, ignoring: %s", rvalue);
 862                 return 0;
 863         }
 864
 865         *o = (*o & LOG_FACMASK) | x;
 866         return 0;
 867 }
 868
 869 int config_parse_signal(
 870                 const char *unit,
 871                 const char *filename,
 872                 unsigned line,
 873                 const char *section,
 874                 unsigned section_line,
 875                 const char *lvalue,
 876                 int ltype,
 877                 const char *rvalue,
 878                 void *data,
 879                 void *userdata) {
 880
 881         int *sig = data, r;
 882
 883         assert(filename);
 884         assert(lvalue);
 885         assert(rvalue);
 886         assert(sig);
 887
 888         r = signal_from_string_try_harder(rvalue);
 889         if (r <= 0) {
 890                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse signal name, ignoring: %s", rvalue);
 891                 return 0;
 892         }
 893
 894         *sig = r;
 895         return 0;
 896 }
 897
 898 int config_parse_personality(
 899                 const char *unit,
 900                 const char *filename,
 901                 unsigned line,
 902                 const char *section,
 903                 unsigned section_line,
 904                 const char *lvalue,
 905                 int ltype,
 906                 const char *rvalue,
 907                 void *data,
 908                 void *userdata) {
 909
 910         unsigned long *personality = data, p;
 911
 912         assert(filename);
 913         assert(lvalue);
 914         assert(rvalue);
 915         assert(personality);
 916
 917         p = personality_from_string(rvalue);
 918         if (p == PERSONALITY_INVALID) {
 919                 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse personality, ignoring: %s", rvalue);
 920                 return 0;
 921         }
 922
 923         *personality = p;
 924         return 0;
 925 }
 926
 927 int config_parse_ifname(
 928                 const char *unit,
 929                 const char *filename,
 930                 unsigned line,
 931                 const char *section,
 932                 unsigned section_line,
 933                 const char *lvalue,
 934                 int ltype,
 935                 const char *rvalue,
 936                 void *data,
 937                 void *userdata) {
 938
 939         char **s = data;
 940         int r;
 941
 942         assert(filename);
 943         assert(lvalue);
 944         assert(rvalue);
 945         assert(data);
 946
 947         if (isempty(rvalue)) {
 948                 *s = mfree(*s);
 949                 return 0;
 950         }
 951
 952         if (!ifname_valid(rvalue)) {
 953                 log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue);
 954                 return 0;
 955         }
 956
 957         r = free_and_strdup(s, rvalue);
 958         if (r < 0)
 959                 return log_oom();
 960
 961         return 0;
 962 }
 963
 964 int config_parse_ip_port(
 965                 const char *unit,
 966                 const char *filename,
 967                 unsigned line,
 968                 const char *section,
 969                 unsigned section_line,
 970                 const char *lvalue,
 971                 int ltype,
 972                 const char *rvalue,
 973                 void *data,
 974                 void *userdata) {
 975
 976         uint16_t *s = data;
 977         uint16_t port;
 978         int r;
 979
 980         assert(filename);
 981         assert(lvalue);
 982         assert(rvalue);
 983         assert(data);
 984
 985         if (isempty(rvalue)) {
 986                 *s = 0;
 987                 return 0;
 988         }
 989
 990         r = parse_ip_port(rvalue, &port);
 991         if (r < 0) {
 992                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse port '%s'.", rvalue);
 993                 return 0;
 994         }
 995
 996         *s = port;
 997
 998         return 0;
 999 }