config.c

   1 /*
   2  * GIT - The information manager from hell
   3  *
   4  * Copyright (C) Linus Torvalds, 2005
   5  * Copyright (C) Johannes Schindelin, 2005
   6  *
   7  */
   8 #include "cache.h"
   9 #include "exec_cmd.h"
  10 #include "strbuf.h"
  11 #include "quote.h"
  12
  13 #define MAXNAME (256)
  14
  15 static FILE *config_file;
  16 static const char *config_file_name;
  17 static int config_linenr;
  18 static int config_file_eof;
  19 static int zlib_compression_seen;
  20
  21 const char *config_exclusive_filename = NULL;
  22
  23 static void lowercase(char *p)
  24 {
  25         for (; *p; p++)
  26                 *p = tolower(*p);
  27 }
  28
  29 void git_config_push_parameter(const char *text)
  30 {
  31         struct strbuf env = STRBUF_INIT;
  32         const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
  33         if (old) {
  34                 strbuf_addstr(&env, old);
  35                 strbuf_addch(&env, ' ');
  36         }
  37         sq_quote_buf(&env, text);
  38         setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
  39         strbuf_release(&env);
  40 }
  41
  42 static int git_config_parse_parameter(const char *text,
  43                                       config_fn_t fn, void *data)
  44 {
  45         struct strbuf tmp = STRBUF_INIT;
  46         struct strbuf **pair;
  47         strbuf_addstr(&tmp, text);
  48         pair = strbuf_split(&tmp, '=');
  49         if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
  50                 strbuf_setlen(pair[0], pair[0]->len - 1);
  51         strbuf_trim(pair[0]);
  52         if (!pair[0]->len) {
  53                 strbuf_list_free(pair);
  54                 return error("bogus config parameter: %s", text);
  55         }
  56         lowercase(pair[0]->buf);
  57         if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
  58                 strbuf_list_free(pair);
  59                 return -1;
  60         }
  61         strbuf_list_free(pair);
  62         return 0;
  63 }
  64
  65 int git_config_from_parameters(config_fn_t fn, void *data)
  66 {
  67         const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
  68         char *envw;
  69         const char **argv = NULL;
  70         int nr = 0, alloc = 0;
  71         int i;
  72
  73         if (!env)
  74                 return 0;
  75         /* sq_dequote will write over it */
  76         envw = xstrdup(env);
  77
  78         if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
  79                 free(envw);
  80                 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
  81         }
  82
  83         for (i = 0; i < nr; i++) {
  84                 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
  85                         free(argv);
  86                         free(envw);
  87                         return -1;
  88                 }
  89         }
  90
  91         free(argv);
  92         free(envw);
  93         return nr > 0;
  94 }
  95
  96 static int get_next_char(void)
  97 {
  98         int c;
  99         FILE *f;
 100
 101         c = '\n';
 102         if ((f = config_file) != NULL) {
 103                 c = fgetc(f);
 104                 if (c == '\r') {
 105                         /* DOS like systems */
 106                         c = fgetc(f);
 107                         if (c != '\n') {
 108                                 ungetc(c, f);
 109                                 c = '\r';
 110                         }
 111                 }
 112                 if (c == '\n')
 113                         config_linenr++;
 114                 if (c == EOF) {
 115                         config_file_eof = 1;
 116                         c = '\n';
 117                 }
 118         }
 119         return c;
 120 }
 121
 122 static char *parse_value(void)
 123 {
 124         static struct strbuf value = STRBUF_INIT;
 125         int quote = 0, comment = 0, space = 0;
 126
 127         strbuf_reset(&value);
 128         for (;;) {
 129                 int c = get_next_char();
 130                 if (c == '\n') {
 131                         if (quote)
 132                                 return NULL;
 133                         return value.buf;
 134                 }
 135                 if (comment)
 136                         continue;
 137                 if (isspace(c) && !quote) {
 138                         if (value.len)
 139                                 space++;
 140                         continue;
 141                 }
 142                 if (!quote) {
 143                         if (c == ';' || c == '#') {
 144                                 comment = 1;
 145                                 continue;
 146                         }
 147                 }
 148                 for (; space; space--)
 149                         strbuf_addch(&value, ' ');
 150                 if (c == '\\') {
 151                         c = get_next_char();
 152                         switch (c) {
 153                         case '\n':
 154                                 continue;
 155                         case 't':
 156                                 c = '\t';
 157                                 break;
 158                         case 'b':
 159                                 c = '\b';
 160                                 break;
 161                         case 'n':
 162                                 c = '\n';
 163                                 break;
 164                         /* Some characters escape as themselves */
 165                         case '\\': case '"':
 166                                 break;
 167                         /* Reject unknown escape sequences */
 168                         default:
 169                                 return NULL;
 170                         }
 171                         strbuf_addch(&value, c);
 172                         continue;
 173                 }
 174                 if (c == '"') {
 175                         quote = 1-quote;
 176                         continue;
 177                 }
 178                 strbuf_addch(&value, c);
 179         }
 180 }
 181
 182 static inline int iskeychar(int c)
 183 {
 184         return isalnum(c) || c == '-';
 185 }
 186
 187 static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
 188 {
 189         int c;
 190         char *value;
 191
 192         /* Get the full name */
 193         for (;;) {
 194                 c = get_next_char();
 195                 if (config_file_eof)
 196                         break;
 197                 if (!iskeychar(c))
 198                         break;
 199                 name[len++] = tolower(c);
 200                 if (len >= MAXNAME)
 201                         return -1;
 202         }
 203         name[len] = 0;
 204         while (c == ' ' || c == '\t')
 205                 c = get_next_char();
 206
 207         value = NULL;
 208         if (c != '\n') {
 209                 if (c != '=')
 210                         return -1;
 211                 value = parse_value();
 212                 if (!value)
 213                         return -1;
 214         }
 215         return fn(name, value, data);
 216 }
 217
 218 static int get_extended_base_var(char *name, int baselen, int c)
 219 {
 220         do {
 221                 if (c == '\n')
 222                         return -1;
 223                 c = get_next_char();
 224         } while (isspace(c));
 225
 226         /* We require the format to be '[base "extension"]' */
 227         if (c != '"')
 228                 return -1;
 229         name[baselen++] = '.';
 230
 231         for (;;) {
 232                 int c = get_next_char();
 233                 if (c == '\n')
 234                         return -1;
 235                 if (c == '"')
 236                         break;
 237                 if (c == '\\') {
 238                         c = get_next_char();
 239                         if (c == '\n')
 240                                 return -1;
 241                 }
 242                 name[baselen++] = c;
 243                 if (baselen > MAXNAME / 2)
 244                         return -1;
 245         }
 246
 247         /* Final ']' */
 248         if (get_next_char() != ']')
 249                 return -1;
 250         return baselen;
 251 }
 252
 253 static int get_base_var(char *name)
 254 {
 255         int baselen = 0;
 256
 257         for (;;) {
 258                 int c = get_next_char();
 259                 if (config_file_eof)
 260                         return -1;
 261                 if (c == ']')
 262                         return baselen;
 263                 if (isspace(c))
 264                         return get_extended_base_var(name, baselen, c);
 265                 if (!iskeychar(c) && c != '.')
 266                         return -1;
 267                 if (baselen > MAXNAME / 2)
 268                         return -1;
 269                 name[baselen++] = tolower(c);
 270         }
 271 }
 272
 273 static int git_parse_file(config_fn_t fn, void *data)
 274 {
 275         int comment = 0;
 276         int baselen = 0;
 277         static char var[MAXNAME];
 278
 279         /* U+FEFF Byte Order Mark in UTF8 */
 280         static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
 281         const unsigned char *bomptr = utf8_bom;
 282
 283         for (;;) {
 284                 int c = get_next_char();
 285                 if (bomptr && *bomptr) {
 286                         /* We are at the file beginning; skip UTF8-encoded BOM
 287                          * if present. Sane editors won't put this in on their
 288                          * own, but e.g. Windows Notepad will do it happily. */
 289                         if ((unsigned char) c == *bomptr) {
 290                                 bomptr++;
 291                                 continue;
 292                         } else {
 293                                 /* Do not tolerate partial BOM. */
 294                                 if (bomptr != utf8_bom)
 295                                         break;
 296                                 /* No BOM at file beginning. Cool. */
 297                                 bomptr = NULL;
 298                         }
 299                 }
 300                 if (c == '\n') {
 301                         if (config_file_eof)
 302                                 return 0;
 303                         comment = 0;
 304                         continue;
 305                 }
 306                 if (comment || isspace(c))
 307                         continue;
 308                 if (c == '#' || c == ';') {
 309                         comment = 1;
 310                         continue;
 311                 }
 312                 if (c == '[') {
 313                         baselen = get_base_var(var);
 314                         if (baselen <= 0)
 315                                 break;
 316                         var[baselen++] = '.';
 317                         var[baselen] = 0;
 318                         continue;
 319                 }
 320                 if (!isalpha(c))
 321                         break;
 322                 var[baselen] = tolower(c);
 323                 if (get_value(fn, data, var, baselen+1) < 0)
 324                         break;
 325         }
 326         die("bad config file line %d in %s", config_linenr, config_file_name);
 327 }
 328
 329 static int parse_unit_factor(const char *end, uintmax_t *val)
 330 {
 331         if (!*end)
 332                 return 1;
 333         else if (!strcasecmp(end, "k")) {
 334                 *val *= 1024;
 335                 return 1;
 336         }
 337         else if (!strcasecmp(end, "m")) {
 338                 *val *= 1024 * 1024;
 339                 return 1;
 340         }
 341         else if (!strcasecmp(end, "g")) {
 342                 *val *= 1024 * 1024 * 1024;
 343                 return 1;
 344         }
 345         return 0;
 346 }
 347
 348 static int git_parse_long(const char *value, long *ret)
 349 {
 350         if (value && *value) {
 351                 char *end;
 352                 intmax_t val;
 353                 uintmax_t uval;
 354                 uintmax_t factor = 1;
 355
 356                 errno = 0;
 357                 val = strtoimax(value, &end, 0);
 358                 if (errno == ERANGE)
 359                         return 0;
 360                 if (!parse_unit_factor(end, &factor))
 361                         return 0;
 362                 uval = abs(val);
 363                 uval *= factor;
 364                 if ((uval > maximum_signed_value_of_type(long)) ||
 365                     (abs(val) > uval))
 366                         return 0;
 367                 val *= factor;
 368                 *ret = val;
 369                 return 1;
 370         }
 371         return 0;
 372 }
 373
 374 int git_parse_ulong(const char *value, unsigned long *ret)
 375 {
 376         if (value && *value) {
 377                 char *end;
 378                 uintmax_t val;
 379                 uintmax_t oldval;
 380
 381                 errno = 0;
 382                 val = strtoumax(value, &end, 0);
 383                 if (errno == ERANGE)
 384                         return 0;
 385                 oldval = val;
 386                 if (!parse_unit_factor(end, &val))
 387                         return 0;
 388                 if ((val > maximum_unsigned_value_of_type(long)) ||
 389                     (oldval > val))
 390                         return 0;
 391                 *ret = val;
 392                 return 1;
 393         }
 394         return 0;
 395 }
 396
 397 static void die_bad_config(const char *name)
 398 {
 399         if (config_file_name)
 400                 die("bad config value for '%s' in %s", name, config_file_name);
 401         die("bad config value for '%s'", name);
 402 }
 403
 404 int git_config_int(const char *name, const char *value)
 405 {
 406         long ret = 0;
 407         if (!git_parse_long(value, &ret))
 408                 die_bad_config(name);
 409         return ret;
 410 }
 411
 412 unsigned long git_config_ulong(const char *name, const char *value)
 413 {
 414         unsigned long ret;
 415         if (!git_parse_ulong(value, &ret))
 416                 die_bad_config(name);
 417         return ret;
 418 }
 419
 420 static int git_config_maybe_bool_text(const char *name, const char *value)
 421 {
 422         if (!value)
 423                 return 1;
 424         if (!*value)
 425                 return 0;
 426         if (!strcasecmp(value, "true")
 427             || !strcasecmp(value, "yes")
 428             || !strcasecmp(value, "on"))
 429                 return 1;
 430         if (!strcasecmp(value, "false")
 431             || !strcasecmp(value, "no")
 432             || !strcasecmp(value, "off"))
 433                 return 0;
 434         return -1;
 435 }
 436
 437 int git_config_maybe_bool(const char *name, const char *value)
 438 {
 439         long v = git_config_maybe_bool_text(name, value);
 440         if (0 <= v)
 441                 return v;
 442         if (git_parse_long(value, &v))
 443                 return !!v;
 444         return -1;
 445 }
 446
 447 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
 448 {
 449         int v = git_config_maybe_bool_text(name, value);
 450         if (0 <= v) {
 451                 *is_bool = 1;
 452                 return v;
 453         }
 454         *is_bool = 0;
 455         return git_config_int(name, value);
 456 }
 457
 458 int git_config_bool(const char *name, const char *value)
 459 {
 460         int discard;
 461         return !!git_config_bool_or_int(name, value, &discard);
 462 }
 463
 464 int git_config_string(const char **dest, const char *var, const char *value)
 465 {
 466         if (!value)
 467                 return config_error_nonbool(var);
 468         *dest = xstrdup(value);
 469         return 0;
 470 }
 471
 472 int git_config_pathname(const char **dest, const char *var, const char *value)
 473 {
 474         if (!value)
 475                 return config_error_nonbool(var);
 476         *dest = expand_user_path(value);
 477         if (!*dest)
 478                 die("Failed to expand user dir in: '%s'", value);
 479         return 0;
 480 }
 481
 482 static int git_default_core_config(const char *var, const char *value)
 483 {
 484         /* This needs a better name */
 485         if (!strcmp(var, "core.filemode")) {
 486                 trust_executable_bit = git_config_bool(var, value);
 487                 return 0;
 488         }
 489         if (!strcmp(var, "core.trustctime")) {
 490                 trust_ctime = git_config_bool(var, value);
 491                 return 0;
 492         }
 493
 494         if (!strcmp(var, "core.quotepath")) {
 495                 quote_path_fully = git_config_bool(var, value);
 496                 return 0;
 497         }
 498
 499         if (!strcmp(var, "core.symlinks")) {
 500                 has_symlinks = git_config_bool(var, value);
 501                 return 0;
 502         }
 503
 504         if (!strcmp(var, "core.ignorecase")) {
 505                 ignore_case = git_config_bool(var, value);
 506                 return 0;
 507         }
 508
 509         if (!strcmp(var, "core.bare")) {
 510                 is_bare_repository_cfg = git_config_bool(var, value);
 511                 return 0;
 512         }
 513
 514         if (!strcmp(var, "core.ignorestat")) {
 515                 assume_unchanged = git_config_bool(var, value);
 516                 return 0;
 517         }
 518
 519         if (!strcmp(var, "core.prefersymlinkrefs")) {
 520                 prefer_symlink_refs = git_config_bool(var, value);
 521                 return 0;
 522         }
 523
 524         if (!strcmp(var, "core.logallrefupdates")) {
 525                 log_all_ref_updates = git_config_bool(var, value);
 526                 return 0;
 527         }
 528
 529         if (!strcmp(var, "core.warnambiguousrefs")) {
 530                 warn_ambiguous_refs = git_config_bool(var, value);
 531                 return 0;
 532         }
 533
 534         if (!strcmp(var, "core.abbrev")) {
 535                 int abbrev = git_config_int(var, value);
 536                 if (abbrev < minimum_abbrev || abbrev > 40)
 537                         return -1;
 538                 default_abbrev = abbrev;
 539                 return 0;
 540         }
 541
 542         if (!strcmp(var, "core.loosecompression")) {
 543                 int level = git_config_int(var, value);
 544                 if (level == -1)
 545                         level = Z_DEFAULT_COMPRESSION;
 546                 else if (level < 0 || level > Z_BEST_COMPRESSION)
 547                         die("bad zlib compression level %d", level);
 548                 zlib_compression_level = level;
 549                 zlib_compression_seen = 1;
 550                 return 0;
 551         }
 552
 553         if (!strcmp(var, "core.compression")) {
 554                 int level = git_config_int(var, value);
 555                 if (level == -1)
 556                         level = Z_DEFAULT_COMPRESSION;
 557                 else if (level < 0 || level > Z_BEST_COMPRESSION)
 558                         die("bad zlib compression level %d", level);
 559                 core_compression_level = level;
 560                 core_compression_seen = 1;
 561                 if (!zlib_compression_seen)
 562                         zlib_compression_level = level;
 563                 return 0;
 564         }
 565
 566         if (!strcmp(var, "core.packedgitwindowsize")) {
 567                 int pgsz_x2 = getpagesize() * 2;
 568                 packed_git_window_size = git_config_ulong(var, value);
 569
 570                 /* This value must be multiple of (pagesize * 2) */
 571                 packed_git_window_size /= pgsz_x2;
 572                 if (packed_git_window_size < 1)
 573                         packed_git_window_size = 1;
 574                 packed_git_window_size *= pgsz_x2;
 575                 return 0;
 576         }
 577
 578         if (!strcmp(var, "core.bigfilethreshold")) {
 579                 big_file_threshold = git_config_ulong(var, value);
 580                 return 0;
 581         }
 582
 583         if (!strcmp(var, "core.packedgitlimit")) {
 584                 packed_git_limit = git_config_ulong(var, value);
 585                 return 0;
 586         }
 587
 588         if (!strcmp(var, "core.deltabasecachelimit")) {
 589                 delta_base_cache_limit = git_config_ulong(var, value);
 590                 return 0;
 591         }
 592
 593         if (!strcmp(var, "core.autocrlf")) {
 594                 if (value && !strcasecmp(value, "input")) {
 595                         if (core_eol == EOL_CRLF)
 596                                 return error("core.autocrlf=input conflicts with core.eol=crlf");
 597                         auto_crlf = AUTO_CRLF_INPUT;
 598                         return 0;
 599                 }
 600                 auto_crlf = git_config_bool(var, value);
 601                 return 0;
 602         }
 603
 604         if (!strcmp(var, "core.safecrlf")) {
 605                 if (value && !strcasecmp(value, "warn")) {
 606                         safe_crlf = SAFE_CRLF_WARN;
 607                         return 0;
 608                 }
 609                 safe_crlf = git_config_bool(var, value);
 610                 return 0;
 611         }
 612
 613         if (!strcmp(var, "core.eol")) {
 614                 if (value && !strcasecmp(value, "lf"))
 615                         core_eol = EOL_LF;
 616                 else if (value && !strcasecmp(value, "crlf"))
 617                         core_eol = EOL_CRLF;
 618                 else if (value && !strcasecmp(value, "native"))
 619                         core_eol = EOL_NATIVE;
 620                 else
 621                         core_eol = EOL_UNSET;
 622                 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
 623                         return error("core.autocrlf=input conflicts with core.eol=crlf");
 624                 return 0;
 625         }
 626
 627         if (!strcmp(var, "core.notesref")) {
 628                 notes_ref_name = xstrdup(value);
 629                 return 0;
 630         }
 631
 632         if (!strcmp(var, "core.pager"))
 633                 return git_config_string(&pager_program, var, value);
 634
 635         if (!strcmp(var, "core.editor"))
 636                 return git_config_string(&editor_program, var, value);
 637
 638         if (!strcmp(var, "core.askpass"))
 639                 return git_config_string(&askpass_program, var, value);
 640
 641         if (!strcmp(var, "core.excludesfile"))
 642                 return git_config_pathname(&excludes_file, var, value);
 643
 644         if (!strcmp(var, "core.whitespace")) {
 645                 if (!value)
 646                         return config_error_nonbool(var);
 647                 whitespace_rule_cfg = parse_whitespace_rule(value);
 648                 return 0;
 649         }
 650
 651         if (!strcmp(var, "core.fsyncobjectfiles")) {
 652                 fsync_object_files = git_config_bool(var, value);
 653                 return 0;
 654         }
 655
 656         if (!strcmp(var, "core.preloadindex")) {
 657                 core_preload_index = git_config_bool(var, value);
 658                 return 0;
 659         }
 660
 661         if (!strcmp(var, "core.createobject")) {
 662                 if (!strcmp(value, "rename"))
 663                         object_creation_mode = OBJECT_CREATION_USES_RENAMES;
 664                 else if (!strcmp(value, "link"))
 665                         object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
 666                 else
 667                         die("Invalid mode for object creation: %s", value);
 668                 return 0;
 669         }
 670
 671         if (!strcmp(var, "core.sparsecheckout")) {
 672                 core_apply_sparse_checkout = git_config_bool(var, value);
 673                 return 0;
 674         }
 675
 676         /* Add other config variables here and to Documentation/config.txt. */
 677         return 0;
 678 }
 679
 680 static int git_default_user_config(const char *var, const char *value)
 681 {
 682         if (!strcmp(var, "user.name")) {
 683                 if (!value)
 684                         return config_error_nonbool(var);
 685                 strlcpy(git_default_name, value, sizeof(git_default_name));
 686                 user_ident_explicitly_given |= IDENT_NAME_GIVEN;
 687                 return 0;
 688         }
 689
 690         if (!strcmp(var, "user.email")) {
 691                 if (!value)
 692                         return config_error_nonbool(var);
 693                 strlcpy(git_default_email, value, sizeof(git_default_email));
 694                 user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
 695                 return 0;
 696         }
 697
 698         /* Add other config variables here and to Documentation/config.txt. */
 699         return 0;
 700 }
 701
 702 static int git_default_i18n_config(const char *var, const char *value)
 703 {
 704         if (!strcmp(var, "i18n.commitencoding"))
 705                 return git_config_string(&git_commit_encoding, var, value);
 706
 707         if (!strcmp(var, "i18n.logoutputencoding"))
 708                 return git_config_string(&git_log_output_encoding, var, value);
 709
 710         /* Add other config variables here and to Documentation/config.txt. */
 711         return 0;
 712 }
 713
 714 static int git_default_branch_config(const char *var, const char *value)
 715 {
 716         if (!strcmp(var, "branch.autosetupmerge")) {
 717                 if (value && !strcasecmp(value, "always")) {
 718                         git_branch_track = BRANCH_TRACK_ALWAYS;
 719                         return 0;
 720                 }
 721                 git_branch_track = git_config_bool(var, value);
 722                 return 0;
 723         }
 724         if (!strcmp(var, "branch.autosetuprebase")) {
 725                 if (!value)
 726                         return config_error_nonbool(var);
 727                 else if (!strcmp(value, "never"))
 728                         autorebase = AUTOREBASE_NEVER;
 729                 else if (!strcmp(value, "local"))
 730                         autorebase = AUTOREBASE_LOCAL;
 731                 else if (!strcmp(value, "remote"))
 732                         autorebase = AUTOREBASE_REMOTE;
 733                 else if (!strcmp(value, "always"))
 734                         autorebase = AUTOREBASE_ALWAYS;
 735                 else
 736                         return error("Malformed value for %s", var);
 737                 return 0;
 738         }
 739
 740         /* Add other config variables here and to Documentation/config.txt. */
 741         return 0;
 742 }
 743
 744 static int git_default_push_config(const char *var, const char *value)
 745 {
 746         if (!strcmp(var, "push.default")) {
 747                 if (!value)
 748                         return config_error_nonbool(var);
 749                 else if (!strcmp(value, "nothing"))
 750                         push_default = PUSH_DEFAULT_NOTHING;
 751                 else if (!strcmp(value, "matching"))
 752                         push_default = PUSH_DEFAULT_MATCHING;
 753                 else if (!strcmp(value, "upstream"))
 754                         push_default = PUSH_DEFAULT_UPSTREAM;
 755                 else if (!strcmp(value, "tracking")) /* deprecated */
 756                         push_default = PUSH_DEFAULT_UPSTREAM;
 757                 else if (!strcmp(value, "current"))
 758                         push_default = PUSH_DEFAULT_CURRENT;
 759                 else {
 760                         error("Malformed value for %s: %s", var, value);
 761                         return error("Must be one of nothing, matching, "
 762                                      "tracking or current.");
 763                 }
 764                 return 0;
 765         }
 766
 767         /* Add other config variables here and to Documentation/config.txt. */
 768         return 0;
 769 }
 770
 771 static int git_default_mailmap_config(const char *var, const char *value)
 772 {
 773         if (!strcmp(var, "mailmap.file"))
 774                 return git_config_string(&git_mailmap_file, var, value);
 775
 776         /* Add other config variables here and to Documentation/config.txt. */
 777         return 0;
 778 }
 779
 780 int git_default_config(const char *var, const char *value, void *dummy)
 781 {
 782         if (!prefixcmp(var, "core."))
 783                 return git_default_core_config(var, value);
 784
 785         if (!prefixcmp(var, "user."))
 786                 return git_default_user_config(var, value);
 787
 788         if (!prefixcmp(var, "i18n."))
 789                 return git_default_i18n_config(var, value);
 790
 791         if (!prefixcmp(var, "branch."))
 792                 return git_default_branch_config(var, value);
 793
 794         if (!prefixcmp(var, "push."))
 795                 return git_default_push_config(var, value);
 796
 797         if (!prefixcmp(var, "mailmap."))
 798                 return git_default_mailmap_config(var, value);
 799
 800         if (!prefixcmp(var, "advice."))
 801                 return git_default_advice_config(var, value);
 802
 803         if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
 804                 pager_use_color = git_config_bool(var,value);
 805                 return 0;
 806         }
 807
 808         /* Add other config variables here and to Documentation/config.txt. */
 809         return 0;
 810 }
 811
 812 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
 813 {
 814         int ret;
 815         FILE *f = fopen(filename, "r");
 816
 817         ret = -1;
 818         if (f) {
 819                 config_file = f;
 820                 config_file_name = filename;
 821                 config_linenr = 1;
 822                 config_file_eof = 0;
 823                 ret = git_parse_file(fn, data);
 824                 fclose(f);
 825                 config_file_name = NULL;
 826         }
 827         return ret;
 828 }
 829
 830 const char *git_etc_gitconfig(void)
 831 {
 832         static const char *system_wide;
 833         if (!system_wide)
 834                 system_wide = system_path(ETC_GITCONFIG);
 835         return system_wide;
 836 }
 837
 838 int git_env_bool(const char *k, int def)
 839 {
 840         const char *v = getenv(k);
 841         return v ? git_config_bool(k, v) : def;
 842 }
 843
 844 int git_config_system(void)
 845 {
 846         return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
 847 }
 848
 849 int git_config_early(config_fn_t fn, void *data, const char *repo_config)
 850 {
 851         int ret = 0, found = 0;
 852         const char *home = NULL;
 853
 854         /* Setting $GIT_CONFIG makes git read _only_ the given config file. */
 855         if (config_exclusive_filename)
 856                 return git_config_from_file(fn, config_exclusive_filename, data);
 857         if (git_config_system() && !access(git_etc_gitconfig(), R_OK)) {
 858                 ret += git_config_from_file(fn, git_etc_gitconfig(),
 859                                             data);
 860                 found += 1;
 861         }
 862
 863         home = getenv("HOME");
 864         if (home) {
 865                 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
 866                 if (!access(user_config, R_OK)) {
 867                         ret += git_config_from_file(fn, user_config, data);
 868                         found += 1;
 869                 }
 870                 free(user_config);
 871         }
 872
 873         if (repo_config && !access(repo_config, R_OK)) {
 874                 ret += git_config_from_file(fn, repo_config, data);
 875                 found += 1;
 876         }
 877
 878         switch (git_config_from_parameters(fn, data)) {
 879         case -1: /* error */
 880                 ret--;
 881                 break;
 882         case 0: /* found nothing */
 883                 break;
 884         default: /* found at least one item */
 885                 found++;
 886                 break;
 887         }
 888
 889         return ret == 0 ? found : ret;
 890 }
 891
 892 int git_config(config_fn_t fn, void *data)
 893 {
 894         char *repo_config = NULL;
 895         int ret;
 896
 897         repo_config = git_pathdup("config");
 898         ret = git_config_early(fn, data, repo_config);
 899         if (repo_config)
 900                 free(repo_config);
 901         return ret;
 902 }
 903
 904 /*
 905  * Find all the stuff for git_config_set() below.
 906  */
 907
 908 #define MAX_MATCHES 512
 909
 910 static struct {
 911         int baselen;
 912         char *key;
 913         int do_not_match;
 914         regex_t *value_regex;
 915         int multi_replace;
 916         size_t offset[MAX_MATCHES];
 917         enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
 918         int seen;
 919 } store;
 920
 921 static int matches(const char *key, const char *value)
 922 {
 923         return !strcmp(key, store.key) &&
 924                 (store.value_regex == NULL ||
 925                  (store.do_not_match ^
 926                   !regexec(store.value_regex, value, 0, NULL, 0)));
 927 }
 928
 929 static int store_aux(const char *key, const char *value, void *cb)
 930 {
 931         const char *ep;
 932         size_t section_len;
 933
 934         switch (store.state) {
 935         case KEY_SEEN:
 936                 if (matches(key, value)) {
 937                         if (store.seen == 1 && store.multi_replace == 0) {
 938                                 warning("%s has multiple values", key);
 939                         } else if (store.seen >= MAX_MATCHES) {
 940                                 error("too many matches for %s", key);
 941                                 return 1;
 942                         }
 943
 944                         store.offset[store.seen] = ftell(config_file);
 945                         store.seen++;
 946                 }
 947                 break;
 948         case SECTION_SEEN:
 949                 /*
 950                  * What we are looking for is in store.key (both
 951                  * section and var), and its section part is baselen
 952                  * long.  We found key (again, both section and var).
 953                  * We would want to know if this key is in the same
 954                  * section as what we are looking for.  We already
 955                  * know we are in the same section as what should
 956                  * hold store.key.
 957                  */
 958                 ep = strrchr(key, '.');
 959                 section_len = ep - key;
 960
 961                 if ((section_len != store.baselen) ||
 962                     memcmp(key, store.key, section_len+1)) {
 963                         store.state = SECTION_END_SEEN;
 964                         break;
 965                 }
 966
 967                 /*
 968                  * Do not increment matches: this is no match, but we
 969                  * just made sure we are in the desired section.
 970                  */
 971                 store.offset[store.seen] = ftell(config_file);
 972                 /* fallthru */
 973         case SECTION_END_SEEN:
 974         case START:
 975                 if (matches(key, value)) {
 976                         store.offset[store.seen] = ftell(config_file);
 977                         store.state = KEY_SEEN;
 978                         store.seen++;
 979                 } else {
 980                         if (strrchr(key, '.') - key == store.baselen &&
 981                               !strncmp(key, store.key, store.baselen)) {
 982                                         store.state = SECTION_SEEN;
 983                                         store.offset[store.seen] = ftell(config_file);
 984                         }
 985                 }
 986         }
 987         return 0;
 988 }
 989
 990 static int write_error(const char *filename)
 991 {
 992         error("failed to write new configuration file %s", filename);
 993
 994         /* Same error code as "failed to rename". */
 995         return 4;
 996 }
 997
 998 static int store_write_section(int fd, const char *key)
 999 {
1000         const char *dot;
1001         int i, success;
1002         struct strbuf sb = STRBUF_INIT;
1003
1004         dot = memchr(key, '.', store.baselen);
1005         if (dot) {
1006                 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1007                 for (i = dot - key + 1; i < store.baselen; i++) {
1008                         if (key[i] == '"' || key[i] == '\\')
1009                                 strbuf_addch(&sb, '\\');
1010                         strbuf_addch(&sb, key[i]);
1011                 }
1012                 strbuf_addstr(&sb, "\"]\n");
1013         } else {
1014                 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1015         }
1016
1017         success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1018         strbuf_release(&sb);
1019
1020         return success;
1021 }
1022
1023 static int store_write_pair(int fd, const char *key, const char *value)
1024 {
1025         int i, success;
1026         int length = strlen(key + store.baselen + 1);
1027         const char *quote = "";
1028         struct strbuf sb = STRBUF_INIT;
1029
1030         /*
1031          * Check to see if the value needs to be surrounded with a dq pair.
1032          * Note that problematic characters are always backslash-quoted; this
1033          * check is about not losing leading or trailing SP and strings that
1034          * follow beginning-of-comment characters (i.e. ';' and '#') by the
1035          * configuration parser.
1036          */
1037         if (value[0] == ' ')
1038                 quote = "\"";
1039         for (i = 0; value[i]; i++)
1040                 if (value[i] == ';' || value[i] == '#')
1041                         quote = "\"";
1042         if (i && value[i - 1] == ' ')
1043                 quote = "\"";
1044
1045         strbuf_addf(&sb, "\t%.*s = %s",
1046                     length, key + store.baselen + 1, quote);
1047
1048         for (i = 0; value[i]; i++)
1049                 switch (value[i]) {
1050                 case '\n':
1051                         strbuf_addstr(&sb, "\\n");
1052                         break;
1053                 case '\t':
1054                         strbuf_addstr(&sb, "\\t");
1055                         break;
1056                 case '"':
1057                 case '\\':
1058                         strbuf_addch(&sb, '\\');
1059                 default:
1060                         strbuf_addch(&sb, value[i]);
1061                         break;
1062                 }
1063         strbuf_addf(&sb, "%s\n", quote);
1064
1065         success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1066         strbuf_release(&sb);
1067
1068         return success;
1069 }
1070
1071 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1072         size_t offset_, int *found_bracket)
1073 {
1074         size_t equal_offset = size, bracket_offset = size;
1075         ssize_t offset;
1076
1077 contline:
1078         for (offset = offset_-2; offset > 0
1079                         && contents[offset] != '\n'; offset--)
1080                 switch (contents[offset]) {
1081                         case '=': equal_offset = offset; break;
1082                         case ']': bracket_offset = offset; break;
1083                 }
1084         if (offset > 0 && contents[offset-1] == '\\') {
1085                 offset_ = offset;
1086                 goto contline;
1087         }
1088         if (bracket_offset < equal_offset) {
1089                 *found_bracket = 1;
1090                 offset = bracket_offset+1;
1091         } else
1092                 offset++;
1093
1094         return offset;
1095 }
1096
1097 int git_config_set(const char *key, const char *value)
1098 {
1099         return git_config_set_multivar(key, value, NULL, 0);
1100 }
1101
1102 /*
1103  * Auxiliary function to sanity-check and split the key into the section
1104  * identifier and variable name.
1105  *
1106  * Returns 0 on success, -1 when there is an invalid character in the key and
1107  * -2 if there is no section name in the key.
1108  *
1109  * store_key - pointer to char* which will hold a copy of the key with
1110  *             lowercase section and variable name
1111  * baselen - pointer to int which will hold the length of the
1112  *           section + subsection part, can be NULL
1113  */
1114 int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1115 {
1116         int i, dot, baselen;
1117         const char *last_dot = strrchr(key, '.');
1118
1119         /*
1120          * Since "key" actually contains the section name and the real
1121          * key name separated by a dot, we have to know where the dot is.
1122          */
1123
1124         if (last_dot == NULL || last_dot == key) {
1125                 error("key does not contain a section: %s", key);
1126                 return -CONFIG_NO_SECTION_OR_NAME;
1127         }
1128
1129         if (!last_dot[1]) {
1130                 error("key does not contain variable name: %s", key);
1131                 return -CONFIG_NO_SECTION_OR_NAME;
1132         }
1133
1134         baselen = last_dot - key;
1135         if (baselen_)
1136                 *baselen_ = baselen;
1137
1138         /*
1139          * Validate the key and while at it, lower case it for matching.
1140          */
1141         *store_key = xmalloc(strlen(key) + 1);
1142
1143         dot = 0;
1144         for (i = 0; key[i]; i++) {
1145                 unsigned char c = key[i];
1146                 if (c == '.')
1147                         dot = 1;
1148                 /* Leave the extended basename untouched.. */
1149                 if (!dot || i > baselen) {
1150                         if (!iskeychar(c) ||
1151                             (i == baselen + 1 && !isalpha(c))) {
1152                                 error("invalid key: %s", key);
1153                                 goto out_free_ret_1;
1154                         }
1155                         c = tolower(c);
1156                 } else if (c == '\n') {
1157                         error("invalid key (newline): %s", key);
1158                         goto out_free_ret_1;
1159                 }
1160                 (*store_key)[i] = c;
1161         }
1162         (*store_key)[i] = 0;
1163
1164         return 0;
1165
1166 out_free_ret_1:
1167         free(*store_key);
1168         return -CONFIG_INVALID_KEY;
1169 }
1170
1171 /*
1172  * If value==NULL, unset in (remove from) config,
1173  * if value_regex!=NULL, disregard key/value pairs where value does not match.
1174  * if multi_replace==0, nothing, or only one matching key/value is replaced,
1175  *     else all matching key/values (regardless how many) are removed,
1176  *     before the new pair is written.
1177  *
1178  * Returns 0 on success.
1179  *
1180  * This function does this:
1181  *
1182  * - it locks the config file by creating ".git/config.lock"
1183  *
1184  * - it then parses the config using store_aux() as validator to find
1185  *   the position on the key/value pair to replace. If it is to be unset,
1186  *   it must be found exactly once.
1187  *
1188  * - the config file is mmap()ed and the part before the match (if any) is
1189  *   written to the lock file, then the changed part and the rest.
1190  *
1191  * - the config file is removed and the lock file rename()d to it.
1192  *
1193  */
1194 int git_config_set_multivar(const char *key, const char *value,
1195         const char *value_regex, int multi_replace)
1196 {
1197         int fd = -1, in_fd;
1198         int ret;
1199         char *config_filename;
1200         struct lock_file *lock = NULL;
1201
1202         if (config_exclusive_filename)
1203                 config_filename = xstrdup(config_exclusive_filename);
1204         else
1205                 config_filename = git_pathdup("config");
1206
1207         /* parse-key returns negative; flip the sign to feed exit(3) */
1208         ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1209         if (ret)
1210                 goto out_free;
1211
1212         store.multi_replace = multi_replace;
1213
1214
1215         /*
1216          * The lock serves a purpose in addition to locking: the new
1217          * contents of .git/config will be written into it.
1218          */
1219         lock = xcalloc(sizeof(struct lock_file), 1);
1220         fd = hold_lock_file_for_update(lock, config_filename, 0);
1221         if (fd < 0) {
1222                 error("could not lock config file %s: %s", config_filename, strerror(errno));
1223                 free(store.key);
1224                 ret = CONFIG_NO_LOCK;
1225                 goto out_free;
1226         }
1227
1228         /*
1229          * If .git/config does not exist yet, write a minimal version.
1230          */
1231         in_fd = open(config_filename, O_RDONLY);
1232         if ( in_fd < 0 ) {
1233                 free(store.key);
1234
1235                 if ( ENOENT != errno ) {
1236                         error("opening %s: %s", config_filename,
1237                               strerror(errno));
1238                         ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
1239                         goto out_free;
1240                 }
1241                 /* if nothing to unset, error out */
1242                 if (value == NULL) {
1243                         ret = CONFIG_NOTHING_SET;
1244                         goto out_free;
1245                 }
1246
1247                 store.key = (char *)key;
1248                 if (!store_write_section(fd, key) ||
1249                     !store_write_pair(fd, key, value))
1250                         goto write_err_out;
1251         } else {
1252                 struct stat st;
1253                 char *contents;
1254                 size_t contents_sz, copy_begin, copy_end;
1255                 int i, new_line = 0;
1256
1257                 if (value_regex == NULL)
1258                         store.value_regex = NULL;
1259                 else {
1260                         if (value_regex[0] == '!') {
1261                                 store.do_not_match = 1;
1262                                 value_regex++;
1263                         } else
1264                                 store.do_not_match = 0;
1265
1266                         store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
1267                         if (regcomp(store.value_regex, value_regex,
1268                                         REG_EXTENDED)) {
1269                                 error("invalid pattern: %s", value_regex);
1270                                 free(store.value_regex);
1271                                 ret = CONFIG_INVALID_PATTERN;
1272                                 goto out_free;
1273                         }
1274                 }
1275
1276                 store.offset[0] = 0;
1277                 store.state = START;
1278                 store.seen = 0;
1279
1280                 /*
1281                  * After this, store.offset will contain the *end* offset
1282                  * of the last match, or remain at 0 if no match was found.
1283                  * As a side effect, we make sure to transform only a valid
1284                  * existing config file.
1285                  */
1286                 if (git_config_from_file(store_aux, config_filename, NULL)) {
1287                         error("invalid config file %s", config_filename);
1288                         free(store.key);
1289                         if (store.value_regex != NULL) {
1290                                 regfree(store.value_regex);
1291                                 free(store.value_regex);
1292                         }
1293                         ret = CONFIG_INVALID_FILE;
1294                         goto out_free;
1295                 }
1296
1297                 free(store.key);
1298                 if (store.value_regex != NULL) {
1299                         regfree(store.value_regex);
1300                         free(store.value_regex);
1301                 }
1302
1303                 /* if nothing to unset, or too many matches, error out */
1304                 if ((store.seen == 0 && value == NULL) ||
1305                                 (store.seen > 1 && multi_replace == 0)) {
1306                         ret = CONFIG_NOTHING_SET;
1307                         goto out_free;
1308                 }
1309
1310                 fstat(in_fd, &st);
1311                 contents_sz = xsize_t(st.st_size);
1312                 contents = xmmap(NULL, contents_sz, PROT_READ,
1313                         MAP_PRIVATE, in_fd, 0);
1314                 close(in_fd);
1315
1316                 if (store.seen == 0)
1317                         store.seen = 1;
1318
1319                 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1320                         if (store.offset[i] == 0) {
1321                                 store.offset[i] = copy_end = contents_sz;
1322                         } else if (store.state != KEY_SEEN) {
1323                                 copy_end = store.offset[i];
1324                         } else
1325                                 copy_end = find_beginning_of_line(
1326                                         contents, contents_sz,
1327                                         store.offset[i]-2, &new_line);
1328
1329                         if (copy_end > 0 && contents[copy_end-1] != '\n')
1330                                 new_line = 1;
1331
1332                         /* write the first part of the config */
1333                         if (copy_end > copy_begin) {
1334                                 if (write_in_full(fd, contents + copy_begin,
1335                                                   copy_end - copy_begin) <
1336                                     copy_end - copy_begin)
1337                                         goto write_err_out;
1338                                 if (new_line &&
1339                                     write_str_in_full(fd, "\n") != 1)
1340                                         goto write_err_out;
1341                         }
1342                         copy_begin = store.offset[i];
1343                 }
1344
1345                 /* write the pair (value == NULL means unset) */
1346                 if (value != NULL) {
1347                         if (store.state == START) {
1348                                 if (!store_write_section(fd, key))
1349                                         goto write_err_out;
1350                         }
1351                         if (!store_write_pair(fd, key, value))
1352                                 goto write_err_out;
1353                 }
1354
1355                 /* write the rest of the config */
1356                 if (copy_begin < contents_sz)
1357                         if (write_in_full(fd, contents + copy_begin,
1358                                           contents_sz - copy_begin) <
1359                             contents_sz - copy_begin)
1360                                 goto write_err_out;
1361
1362                 munmap(contents, contents_sz);
1363         }
1364
1365         if (commit_lock_file(lock) < 0) {
1366                 error("could not commit config file %s", config_filename);
1367                 ret = CONFIG_NO_WRITE;
1368                 goto out_free;
1369         }
1370
1371         /*
1372          * lock is committed, so don't try to roll it back below.
1373          * NOTE: Since lockfile.c keeps a linked list of all created
1374          * lock_file structures, it isn't safe to free(lock).  It's
1375          * better to just leave it hanging around.
1376          */
1377         lock = NULL;
1378         ret = 0;
1379
1380 out_free:
1381         if (lock)
1382                 rollback_lock_file(lock);
1383         free(config_filename);
1384         return ret;
1385
1386 write_err_out:
1387         ret = write_error(lock->filename);
1388         goto out_free;
1389
1390 }
1391
1392 static int section_name_match (const char *buf, const char *name)
1393 {
1394         int i = 0, j = 0, dot = 0;
1395         if (buf[i] != '[')
1396                 return 0;
1397         for (i = 1; buf[i] && buf[i] != ']'; i++) {
1398                 if (!dot && isspace(buf[i])) {
1399                         dot = 1;
1400                         if (name[j++] != '.')
1401                                 break;
1402                         for (i++; isspace(buf[i]); i++)
1403                                 ; /* do nothing */
1404                         if (buf[i] != '"')
1405                                 break;
1406                         continue;
1407                 }
1408                 if (buf[i] == '\\' && dot)
1409                         i++;
1410                 else if (buf[i] == '"' && dot) {
1411                         for (i++; isspace(buf[i]); i++)
1412                                 ; /* do_nothing */
1413                         break;
1414                 }
1415                 if (buf[i] != name[j++])
1416                         break;
1417         }
1418         if (buf[i] == ']' && name[j] == 0) {
1419                 /*
1420                  * We match, now just find the right length offset by
1421                  * gobbling up any whitespace after it, as well
1422                  */
1423                 i++;
1424                 for (; buf[i] && isspace(buf[i]); i++)
1425                         ; /* do nothing */
1426                 return i;
1427         }
1428         return 0;
1429 }
1430
1431 /* if new_name == NULL, the section is removed instead */
1432 int git_config_rename_section(const char *old_name, const char *new_name)
1433 {
1434         int ret = 0, remove = 0;
1435         char *config_filename;
1436         struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1437         int out_fd;
1438         char buf[1024];
1439
1440         if (config_exclusive_filename)
1441                 config_filename = xstrdup(config_exclusive_filename);
1442         else
1443                 config_filename = git_pathdup("config");
1444         out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1445         if (out_fd < 0) {
1446                 ret = error("could not lock config file %s", config_filename);
1447                 goto out;
1448         }
1449
1450         if (!(config_file = fopen(config_filename, "rb"))) {
1451                 /* no config file means nothing to rename, no error */
1452                 goto unlock_and_out;
1453         }
1454
1455         while (fgets(buf, sizeof(buf), config_file)) {
1456                 int i;
1457                 int length;
1458                 char *output = buf;
1459                 for (i = 0; buf[i] && isspace(buf[i]); i++)
1460                         ; /* do nothing */
1461                 if (buf[i] == '[') {
1462                         /* it's a section */
1463                         int offset = section_name_match(&buf[i], old_name);
1464                         if (offset > 0) {
1465                                 ret++;
1466                                 if (new_name == NULL) {
1467                                         remove = 1;
1468                                         continue;
1469                                 }
1470                                 store.baselen = strlen(new_name);
1471                                 if (!store_write_section(out_fd, new_name)) {
1472                                         ret = write_error(lock->filename);
1473                                         goto out;
1474                                 }
1475                                 /*
1476                                  * We wrote out the new section, with
1477                                  * a newline, now skip the old
1478                                  * section's length
1479                                  */
1480                                 output += offset + i;
1481                                 if (strlen(output) > 0) {
1482                                         /*
1483                                          * More content means there's
1484                                          * a declaration to put on the
1485                                          * next line; indent with a
1486                                          * tab
1487                                          */
1488                                         output -= 1;
1489                                         output[0] = '\t';
1490                                 }
1491                         }
1492                         remove = 0;
1493                 }
1494                 if (remove)
1495                         continue;
1496                 length = strlen(output);
1497                 if (write_in_full(out_fd, output, length) != length) {
1498                         ret = write_error(lock->filename);
1499                         goto out;
1500                 }
1501         }
1502         fclose(config_file);
1503  unlock_and_out:
1504         if (commit_lock_file(lock) < 0)
1505                 ret = error("could not commit config file %s", config_filename);
1506  out:
1507         free(config_filename);
1508         return ret;
1509 }
1510
1511 /*
1512  * Call this to report error for your variable that should not
1513  * get a boolean value (i.e. "[my] var" means "true").
1514  */
1515 int config_error_nonbool(const char *var)
1516 {
1517         return error("Missing value for '%s'", var);
1518 }