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