Andrew's git - gitweb.git/blob

1e30ad9d18dc51eeaee72e33b6cc133e6ead1c99
   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
  15typedef 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
  25static config_file *cf;
  26
  27static int zlib_compression_seen;
  28
  29static void lowercase(char *p)
  30{
  31        for (; *p; p++)
  32                *p = tolower(*p);
  33}
  34
  35void git_config_push_parameter(const char *text)
  36{
  37        struct strbuf env = STRBUF_INIT;
  38        const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
  39        if (old) {
  40                strbuf_addstr(&env, old);
  41                strbuf_addch(&env, ' ');
  42        }
  43        sq_quote_buf(&env, text);
  44        setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
  45        strbuf_release(&env);
  46}
  47
  48int git_config_parse_parameter(const char *text,
  49                               config_fn_t fn, void *data)
  50{
  51        struct strbuf **pair;
  52        pair = strbuf_split_str(text, '=', 2);
  53        if (!pair[0])
  54                return error("bogus config parameter: %s", text);
  55        if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
  56                strbuf_setlen(pair[0], pair[0]->len - 1);
  57        strbuf_trim(pair[0]);
  58        if (!pair[0]->len) {
  59                strbuf_list_free(pair);
  60                return error("bogus config parameter: %s", text);
  61        }
  62        lowercase(pair[0]->buf);
  63        if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
  64                strbuf_list_free(pair);
  65                return -1;
  66        }
  67        strbuf_list_free(pair);
  68        return 0;
  69}
  70
  71int git_config_from_parameters(config_fn_t fn, void *data)
  72{
  73        const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
  74        char *envw;
  75        const char **argv = NULL;
  76        int nr = 0, alloc = 0;
  77        int i;
  78
  79        if (!env)
  80                return 0;
  81        /* sq_dequote will write over it */
  82        envw = xstrdup(env);
  83
  84        if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
  85                free(envw);
  86                return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
  87        }
  88
  89        for (i = 0; i < nr; i++) {
  90                if (git_config_parse_parameter(argv[i], fn, data) < 0) {
  91                        free(argv);
  92                        free(envw);
  93                        return -1;
  94                }
  95        }
  96
  97        free(argv);
  98        free(envw);
  99        return nr > 0;
 100}
 101
 102static int get_next_char(void)
 103{
 104        int c;
 105        FILE *f;
 106
 107        c = '\n';
 108        if (cf && ((f = cf->f) != NULL)) {
 109                c = fgetc(f);
 110                if (c == '\r') {
 111                        /* DOS like systems */
 112                        c = fgetc(f);
 113                        if (c != '\n') {
 114                                ungetc(c, f);
 115                                c = '\r';
 116                        }
 117                }
 118                if (c == '\n')
 119                        cf->linenr++;
 120                if (c == EOF) {
 121                        cf->eof = 1;
 122                        c = '\n';
 123                }
 124        }
 125        return c;
 126}
 127
 128static char *parse_value(void)
 129{
 130        int quote = 0, comment = 0, space = 0;
 131
 132        strbuf_reset(&cf->value);
 133        for (;;) {
 134                int c = get_next_char();
 135                if (c == '\n') {
 136                        if (quote)
 137                                return NULL;
 138                        return cf->value.buf;
 139                }
 140                if (comment)
 141                        continue;
 142                if (isspace(c) && !quote) {
 143                        if (cf->value.len)
 144                                space++;
 145                        continue;
 146                }
 147                if (!quote) {
 148                        if (c == ';' || c == '#') {
 149                                comment = 1;
 150                                continue;
 151                        }
 152                }
 153                for (; space; space--)
 154                        strbuf_addch(&cf->value, ' ');
 155                if (c == '\\') {
 156                        c = get_next_char();
 157                        switch (c) {
 158                        case '\n':
 159                                continue;
 160                        case 't':
 161                                c = '\t';
 162                                break;
 163                        case 'b':
 164                                c = '\b';
 165                                break;
 166                        case 'n':
 167                                c = '\n';
 168                                break;
 169                        /* Some characters escape as themselves */
 170                        case '\\': case '"':
 171                                break;
 172                        /* Reject unknown escape sequences */
 173                        default:
 174                                return NULL;
 175                        }
 176                        strbuf_addch(&cf->value, c);
 177                        continue;
 178                }
 179                if (c == '"') {
 180                        quote = 1-quote;
 181                        continue;
 182                }
 183                strbuf_addch(&cf->value, c);
 184        }
 185}
 186
 187static inline int iskeychar(int c)
 188{
 189        return isalnum(c) || c == '-';
 190}
 191
 192static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
 193{
 194        int c;
 195        char *value;
 196
 197        /* Get the full name */
 198        for (;;) {
 199                c = get_next_char();
 200                if (cf->eof)
 201                        break;
 202                if (!iskeychar(c))
 203                        break;
 204                name[len++] = tolower(c);
 205                if (len >= MAXNAME)
 206                        return -1;
 207        }
 208        name[len] = 0;
 209        while (c == ' ' || c == '\t')
 210                c = get_next_char();
 211
 212        value = NULL;
 213        if (c != '\n') {
 214                if (c != '=')
 215                        return -1;
 216                value = parse_value();
 217                if (!value)
 218                        return -1;
 219        }
 220        return fn(name, value, data);
 221}
 222
 223static int get_extended_base_var(char *name, int baselen, int c)
 224{
 225        do {
 226                if (c == '\n')
 227                        return -1;
 228                c = get_next_char();
 229        } while (isspace(c));
 230
 231        /* We require the format to be '[base "extension"]' */
 232        if (c != '"')
 233                return -1;
 234        name[baselen++] = '.';
 235
 236        for (;;) {
 237                int c = get_next_char();
 238                if (c == '\n')
 239                        return -1;
 240                if (c == '"')
 241                        break;
 242                if (c == '\\') {
 243                        c = get_next_char();
 244                        if (c == '\n')
 245                                return -1;
 246                }
 247                name[baselen++] = c;
 248                if (baselen > MAXNAME / 2)
 249                        return -1;
 250        }
 251
 252        /* Final ']' */
 253        if (get_next_char() != ']')
 254                return -1;
 255        return baselen;
 256}
 257
 258static int get_base_var(char *name)
 259{
 260        int baselen = 0;
 261
 262        for (;;) {
 263                int c = get_next_char();
 264                if (cf->eof)
 265                        return -1;
 266                if (c == ']')
 267                        return baselen;
 268                if (isspace(c))
 269                        return get_extended_base_var(name, baselen, c);
 270                if (!iskeychar(c) && c != '.')
 271                        return -1;
 272                if (baselen > MAXNAME / 2)
 273                        return -1;
 274                name[baselen++] = tolower(c);
 275        }
 276}
 277
 278static int git_parse_file(config_fn_t fn, void *data)
 279{
 280        int comment = 0;
 281        int baselen = 0;
 282        char *var = cf->var;
 283
 284        /* U+FEFF Byte Order Mark in UTF8 */
 285        static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
 286        const unsigned char *bomptr = utf8_bom;
 287
 288        for (;;) {
 289                int c = get_next_char();
 290                if (bomptr && *bomptr) {
 291                        /* We are at the file beginning; skip UTF8-encoded BOM
 292                         * if present. Sane editors won't put this in on their
 293                         * own, but e.g. Windows Notepad will do it happily. */
 294                        if ((unsigned char) c == *bomptr) {
 295                                bomptr++;
 296                                continue;
 297                        } else {
 298                                /* Do not tolerate partial BOM. */
 299                                if (bomptr != utf8_bom)
 300                                        break;
 301                                /* No BOM at file beginning. Cool. */
 302                                bomptr = NULL;
 303                        }
 304                }
 305                if (c == '\n') {
 306                        if (cf->eof)
 307                                return 0;
 308                        comment = 0;
 309                        continue;
 310                }
 311                if (comment || isspace(c))
 312                        continue;
 313                if (c == '#' || c == ';') {
 314                        comment = 1;
 315                        continue;
 316                }
 317                if (c == '[') {
 318                        baselen = get_base_var(var);
 319                        if (baselen <= 0)
 320                                break;
 321                        var[baselen++] = '.';
 322                        var[baselen] = 0;
 323                        continue;
 324                }
 325                if (!isalpha(c))
 326                        break;
 327                var[baselen] = tolower(c);
 328                if (get_value(fn, data, var, baselen+1) < 0)
 329                        break;
 330        }
 331        die("bad config file line %d in %s", cf->linenr, cf->name);
 332}
 333
 334static int parse_unit_factor(const char *end, uintmax_t *val)
 335{
 336        if (!*end)
 337                return 1;
 338        else if (!strcasecmp(end, "k")) {
 339                *val *= 1024;
 340                return 1;
 341        }
 342        else if (!strcasecmp(end, "m")) {
 343                *val *= 1024 * 1024;
 344                return 1;
 345        }
 346        else if (!strcasecmp(end, "g")) {
 347                *val *= 1024 * 1024 * 1024;
 348                return 1;
 349        }
 350        return 0;
 351}
 352
 353static int git_parse_long(const char *value, long *ret)
 354{
 355        if (value && *value) {
 356                char *end;
 357                intmax_t val;
 358                uintmax_t uval;
 359                uintmax_t factor = 1;
 360
 361                errno = 0;
 362                val = strtoimax(value, &end, 0);
 363                if (errno == ERANGE)
 364                        return 0;
 365                if (!parse_unit_factor(end, &factor))
 366                        return 0;
 367                uval = abs(val);
 368                uval *= factor;
 369                if ((uval > maximum_signed_value_of_type(long)) ||
 370                    (abs(val) > uval))
 371                        return 0;
 372                val *= factor;
 373                *ret = val;
 374                return 1;
 375        }
 376        return 0;
 377}
 378
 379int git_parse_ulong(const char *value, unsigned long *ret)
 380{
 381        if (value && *value) {
 382                char *end;
 383                uintmax_t val;
 384                uintmax_t oldval;
 385
 386                errno = 0;
 387                val = strtoumax(value, &end, 0);
 388                if (errno == ERANGE)
 389                        return 0;
 390                oldval = val;
 391                if (!parse_unit_factor(end, &val))
 392                        return 0;
 393                if ((val > maximum_unsigned_value_of_type(long)) ||
 394                    (oldval > val))
 395                        return 0;
 396                *ret = val;
 397                return 1;
 398        }
 399        return 0;
 400}
 401
 402static void die_bad_config(const char *name)
 403{
 404        if (cf && cf->name)
 405                die("bad config value for '%s' in %s", name, cf->name);
 406        die("bad config value for '%s'", name);
 407}
 408
 409int git_config_int(const char *name, const char *value)
 410{
 411        long ret = 0;
 412        if (!git_parse_long(value, &ret))
 413                die_bad_config(name);
 414        return ret;
 415}
 416
 417unsigned long git_config_ulong(const char *name, const char *value)
 418{
 419        unsigned long ret;
 420        if (!git_parse_ulong(value, &ret))
 421                die_bad_config(name);
 422        return ret;
 423}
 424
 425static int git_config_maybe_bool_text(const char *name, const char *value)
 426{
 427        if (!value)
 428                return 1;
 429        if (!*value)
 430                return 0;
 431        if (!strcasecmp(value, "true")
 432            || !strcasecmp(value, "yes")
 433            || !strcasecmp(value, "on"))
 434                return 1;
 435        if (!strcasecmp(value, "false")
 436            || !strcasecmp(value, "no")
 437            || !strcasecmp(value, "off"))
 438                return 0;
 439        return -1;
 440}
 441
 442int git_config_maybe_bool(const char *name, const char *value)
 443{
 444        long v = git_config_maybe_bool_text(name, value);
 445        if (0 <= v)
 446                return v;
 447        if (git_parse_long(value, &v))
 448                return !!v;
 449        return -1;
 450}
 451
 452int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
 453{
 454        int v = git_config_maybe_bool_text(name, value);
 455        if (0 <= v) {
 456                *is_bool = 1;
 457                return v;
 458        }
 459        *is_bool = 0;
 460        return git_config_int(name, value);
 461}
 462
 463int git_config_bool(const char *name, const char *value)
 464{
 465        int discard;
 466        return !!git_config_bool_or_int(name, value, &discard);
 467}
 468
 469int git_config_string(const char **dest, const char *var, const char *value)
 470{
 471        if (!value)
 472                return config_error_nonbool(var);
 473        *dest = xstrdup(value);
 474        return 0;
 475}
 476
 477int git_config_pathname(const char **dest, const char *var, const char *value)
 478{
 479        if (!value)
 480                return config_error_nonbool(var);
 481        *dest = expand_user_path(value);
 482        if (!*dest)
 483                die("Failed to expand user dir in: '%s'", value);
 484        return 0;
 485}
 486
 487static int git_default_core_config(const char *var, const char *value)
 488{
 489        /* This needs a better name */
 490        if (!strcmp(var, "core.filemode")) {
 491                trust_executable_bit = git_config_bool(var, value);
 492                return 0;
 493        }
 494        if (!strcmp(var, "core.trustctime")) {
 495                trust_ctime = git_config_bool(var, value);
 496                return 0;
 497        }
 498
 499        if (!strcmp(var, "core.quotepath")) {
 500                quote_path_fully = git_config_bool(var, value);
 501                return 0;
 502        }
 503
 504        if (!strcmp(var, "core.symlinks")) {
 505                has_symlinks = git_config_bool(var, value);
 506                return 0;
 507        }
 508
 509        if (!strcmp(var, "core.ignorecase")) {
 510                ignore_case = git_config_bool(var, value);
 511                return 0;
 512        }
 513
 514        if (!strcmp(var, "core.attributesfile"))
 515                return git_config_pathname(&git_attributes_file, var, value);
 516
 517        if (!strcmp(var, "core.bare")) {
 518                is_bare_repository_cfg = git_config_bool(var, value);
 519                return 0;
 520        }
 521
 522        if (!strcmp(var, "core.ignorestat")) {
 523                assume_unchanged = git_config_bool(var, value);
 524                return 0;
 525        }
 526
 527        if (!strcmp(var, "core.prefersymlinkrefs")) {
 528                prefer_symlink_refs = git_config_bool(var, value);
 529                return 0;
 530        }
 531
 532        if (!strcmp(var, "core.logallrefupdates")) {
 533                log_all_ref_updates = git_config_bool(var, value);
 534                return 0;
 535        }
 536
 537        if (!strcmp(var, "core.warnambiguousrefs")) {
 538                warn_ambiguous_refs = git_config_bool(var, value);
 539                return 0;
 540        }
 541
 542        if (!strcmp(var, "core.abbrev")) {
 543                int abbrev = git_config_int(var, value);
 544                if (abbrev < minimum_abbrev || abbrev > 40)
 545                        return -1;
 546                default_abbrev = abbrev;
 547                return 0;
 548        }
 549
 550        if (!strcmp(var, "core.loosecompression")) {
 551                int level = git_config_int(var, value);
 552                if (level == -1)
 553                        level = Z_DEFAULT_COMPRESSION;
 554                else if (level < 0 || level > Z_BEST_COMPRESSION)
 555                        die("bad zlib compression level %d", level);
 556                zlib_compression_level = level;
 557                zlib_compression_seen = 1;
 558                return 0;
 559        }
 560
 561        if (!strcmp(var, "core.compression")) {
 562                int level = git_config_int(var, value);
 563                if (level == -1)
 564                        level = Z_DEFAULT_COMPRESSION;
 565                else if (level < 0 || level > Z_BEST_COMPRESSION)
 566                        die("bad zlib compression level %d", level);
 567                core_compression_level = level;
 568                core_compression_seen = 1;
 569                if (!zlib_compression_seen)
 570                        zlib_compression_level = level;
 571                return 0;
 572        }
 573
 574        if (!strcmp(var, "core.packedgitwindowsize")) {
 575                int pgsz_x2 = getpagesize() * 2;
 576                packed_git_window_size = git_config_ulong(var, value);
 577
 578                /* This value must be multiple of (pagesize * 2) */
 579                packed_git_window_size /= pgsz_x2;
 580                if (packed_git_window_size < 1)
 581                        packed_git_window_size = 1;
 582                packed_git_window_size *= pgsz_x2;
 583                return 0;
 584        }
 585
 586        if (!strcmp(var, "core.bigfilethreshold")) {
 587                big_file_threshold = git_config_ulong(var, value);
 588                return 0;
 589        }
 590
 591        if (!strcmp(var, "core.packedgitlimit")) {
 592                packed_git_limit = git_config_ulong(var, value);
 593                return 0;
 594        }
 595
 596        if (!strcmp(var, "core.deltabasecachelimit")) {
 597                delta_base_cache_limit = git_config_ulong(var, value);
 598                return 0;
 599        }
 600
 601        if (!strcmp(var, "core.logpackaccess"))
 602                return git_config_string(&log_pack_access, var, value);
 603
 604        if (!strcmp(var, "core.autocrlf")) {
 605                if (value && !strcasecmp(value, "input")) {
 606                        if (core_eol == EOL_CRLF)
 607                                return error("core.autocrlf=input conflicts with core.eol=crlf");
 608                        auto_crlf = AUTO_CRLF_INPUT;
 609                        return 0;
 610                }
 611                auto_crlf = git_config_bool(var, value);
 612                return 0;
 613        }
 614
 615        if (!strcmp(var, "core.safecrlf")) {
 616                if (value && !strcasecmp(value, "warn")) {
 617                        safe_crlf = SAFE_CRLF_WARN;
 618                        return 0;
 619                }
 620                safe_crlf = git_config_bool(var, value);
 621                return 0;
 622        }
 623
 624        if (!strcmp(var, "core.eol")) {
 625                if (value && !strcasecmp(value, "lf"))
 626                        core_eol = EOL_LF;
 627                else if (value && !strcasecmp(value, "crlf"))
 628                        core_eol = EOL_CRLF;
 629                else if (value && !strcasecmp(value, "native"))
 630                        core_eol = EOL_NATIVE;
 631                else
 632                        core_eol = EOL_UNSET;
 633                if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
 634                        return error("core.autocrlf=input conflicts with core.eol=crlf");
 635                return 0;
 636        }
 637
 638        if (!strcmp(var, "core.notesref")) {
 639                notes_ref_name = xstrdup(value);
 640                return 0;
 641        }
 642
 643        if (!strcmp(var, "core.pager"))
 644                return git_config_string(&pager_program, var, value);
 645
 646        if (!strcmp(var, "core.editor"))
 647                return git_config_string(&editor_program, var, value);
 648
 649        if (!strcmp(var, "core.askpass"))
 650                return git_config_string(&askpass_program, var, value);
 651
 652        if (!strcmp(var, "core.excludesfile"))
 653                return git_config_pathname(&excludes_file, var, value);
 654
 655        if (!strcmp(var, "core.whitespace")) {
 656                if (!value)
 657                        return config_error_nonbool(var);
 658                whitespace_rule_cfg = parse_whitespace_rule(value);
 659                return 0;
 660        }
 661
 662        if (!strcmp(var, "core.fsyncobjectfiles")) {
 663                fsync_object_files = git_config_bool(var, value);
 664                return 0;
 665        }
 666
 667        if (!strcmp(var, "core.preloadindex")) {
 668                core_preload_index = git_config_bool(var, value);
 669                return 0;
 670        }
 671
 672        if (!strcmp(var, "core.createobject")) {
 673                if (!strcmp(value, "rename"))
 674                        object_creation_mode = OBJECT_CREATION_USES_RENAMES;
 675                else if (!strcmp(value, "link"))
 676                        object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
 677                else
 678                        die("Invalid mode for object creation: %s", value);
 679                return 0;
 680        }
 681
 682        if (!strcmp(var, "core.sparsecheckout")) {
 683                core_apply_sparse_checkout = git_config_bool(var, value);
 684                return 0;
 685        }
 686
 687        /* Add other config variables here and to Documentation/config.txt. */
 688        return 0;
 689}
 690
 691static int git_default_user_config(const char *var, const char *value)
 692{
 693        if (!strcmp(var, "user.name")) {
 694                if (!value)
 695                        return config_error_nonbool(var);
 696                strlcpy(git_default_name, value, sizeof(git_default_name));
 697                user_ident_explicitly_given |= IDENT_NAME_GIVEN;
 698                return 0;
 699        }
 700
 701        if (!strcmp(var, "user.email")) {
 702                if (!value)
 703                        return config_error_nonbool(var);
 704                strlcpy(git_default_email, value, sizeof(git_default_email));
 705                user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
 706                return 0;
 707        }
 708
 709        /* Add other config variables here and to Documentation/config.txt. */
 710        return 0;
 711}
 712
 713static int git_default_i18n_config(const char *var, const char *value)
 714{
 715        if (!strcmp(var, "i18n.commitencoding"))
 716                return git_config_string(&git_commit_encoding, var, value);
 717
 718        if (!strcmp(var, "i18n.logoutputencoding"))
 719                return git_config_string(&git_log_output_encoding, var, value);
 720
 721        /* Add other config variables here and to Documentation/config.txt. */
 722        return 0;
 723}
 724
 725static int git_default_branch_config(const char *var, const char *value)
 726{
 727        if (!strcmp(var, "branch.autosetupmerge")) {
 728                if (value && !strcasecmp(value, "always")) {
 729                        git_branch_track = BRANCH_TRACK_ALWAYS;
 730                        return 0;
 731                }
 732                git_branch_track = git_config_bool(var, value);
 733                return 0;
 734        }
 735        if (!strcmp(var, "branch.autosetuprebase")) {
 736                if (!value)
 737                        return config_error_nonbool(var);
 738                else if (!strcmp(value, "never"))
 739                        autorebase = AUTOREBASE_NEVER;
 740                else if (!strcmp(value, "local"))
 741                        autorebase = AUTOREBASE_LOCAL;
 742                else if (!strcmp(value, "remote"))
 743                        autorebase = AUTOREBASE_REMOTE;
 744                else if (!strcmp(value, "always"))
 745                        autorebase = AUTOREBASE_ALWAYS;
 746                else
 747                        return error("Malformed value for %s", var);
 748                return 0;
 749        }
 750
 751        /* Add other config variables here and to Documentation/config.txt. */
 752        return 0;
 753}
 754
 755static int git_default_push_config(const char *var, const char *value)
 756{
 757        if (!strcmp(var, "push.default")) {
 758                if (!value)
 759                        return config_error_nonbool(var);
 760                else if (!strcmp(value, "nothing"))
 761                        push_default = PUSH_DEFAULT_NOTHING;
 762                else if (!strcmp(value, "matching"))
 763                        push_default = PUSH_DEFAULT_MATCHING;
 764                else if (!strcmp(value, "upstream"))
 765                        push_default = PUSH_DEFAULT_UPSTREAM;
 766                else if (!strcmp(value, "tracking")) /* deprecated */
 767                        push_default = PUSH_DEFAULT_UPSTREAM;
 768                else if (!strcmp(value, "current"))
 769                        push_default = PUSH_DEFAULT_CURRENT;
 770                else {
 771                        error("Malformed value for %s: %s", var, value);
 772                        return error("Must be one of nothing, matching, "
 773                                     "tracking or current.");
 774                }
 775                return 0;
 776        }
 777
 778        /* Add other config variables here and to Documentation/config.txt. */
 779        return 0;
 780}
 781
 782static int git_default_mailmap_config(const char *var, const char *value)
 783{
 784        if (!strcmp(var, "mailmap.file"))
 785                return git_config_string(&git_mailmap_file, var, value);
 786
 787        /* Add other config variables here and to Documentation/config.txt. */
 788        return 0;
 789}
 790
 791int git_default_config(const char *var, const char *value, void *dummy)
 792{
 793        if (!prefixcmp(var, "core."))
 794                return git_default_core_config(var, value);
 795
 796        if (!prefixcmp(var, "user."))
 797                return git_default_user_config(var, value);
 798
 799        if (!prefixcmp(var, "i18n."))
 800                return git_default_i18n_config(var, value);
 801
 802        if (!prefixcmp(var, "branch."))
 803                return git_default_branch_config(var, value);
 804
 805        if (!prefixcmp(var, "push."))
 806                return git_default_push_config(var, value);
 807
 808        if (!prefixcmp(var, "mailmap."))
 809                return git_default_mailmap_config(var, value);
 810
 811        if (!prefixcmp(var, "advice."))
 812                return git_default_advice_config(var, value);
 813
 814        if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
 815                pager_use_color = git_config_bool(var,value);
 816                return 0;
 817        }
 818
 819        if (!strcmp(var, "pack.packsizelimit")) {
 820                pack_size_limit_cfg = git_config_ulong(var, value);
 821                return 0;
 822        }
 823        /* Add other config variables here and to Documentation/config.txt. */
 824        return 0;
 825}
 826
 827int git_config_from_file(config_fn_t fn, const char *filename, void *data)
 828{
 829        int ret;
 830        FILE *f = fopen(filename, "r");
 831
 832        ret = -1;
 833        if (f) {
 834                config_file top;
 835
 836                /* push config-file parsing state stack */
 837                top.prev = cf;
 838                top.f = f;
 839                top.name = filename;
 840                top.linenr = 1;
 841                top.eof = 0;
 842                strbuf_init(&top.value, 1024);
 843                cf = &top;
 844
 845                ret = git_parse_file(fn, data);
 846
 847                /* pop config-file parsing state stack */
 848                strbuf_release(&top.value);
 849                cf = top.prev;
 850
 851                fclose(f);
 852        }
 853        return ret;
 854}
 855
 856const char *git_etc_gitconfig(void)
 857{
 858        static const char *system_wide;
 859        if (!system_wide)
 860                system_wide = system_path(ETC_GITCONFIG);
 861        return system_wide;
 862}
 863
 864int git_env_bool(const char *k, int def)
 865{
 866        const char *v = getenv(k);
 867        return v ? git_config_bool(k, v) : def;
 868}
 869
 870int git_config_system(void)
 871{
 872        return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
 873}
 874
 875int git_config_early(config_fn_t fn, void *data, const char *repo_config)
 876{
 877        int ret = 0, found = 0;
 878        const char *home = NULL;
 879
 880        if (git_config_system() && !access(git_etc_gitconfig(), R_OK)) {
 881                ret += git_config_from_file(fn, git_etc_gitconfig(),
 882                                            data);
 883                found += 1;
 884        }
 885
 886        home = getenv("HOME");
 887        if (home) {
 888                char buf[PATH_MAX];
 889                char *user_config = mksnpath(buf, sizeof(buf), "%s/.gitconfig", home);
 890                if (!access(user_config, R_OK)) {
 891                        ret += git_config_from_file(fn, user_config, data);
 892                        found += 1;
 893                }
 894        }
 895
 896        if (repo_config && !access(repo_config, R_OK)) {
 897                ret += git_config_from_file(fn, repo_config, data);
 898                found += 1;
 899        }
 900
 901        switch (git_config_from_parameters(fn, data)) {
 902        case -1: /* error */
 903                die("unable to parse command-line config");
 904                break;
 905        case 0: /* found nothing */
 906                break;
 907        default: /* found at least one item */
 908                found++;
 909                break;
 910        }
 911
 912        return ret == 0 ? found : ret;
 913}
 914
 915int git_config_with_options(config_fn_t fn, void *data,
 916                            const char *filename)
 917{
 918        char *repo_config = NULL;
 919        int ret;
 920
 921        /*
 922         * If we have a specific filename, use it. Otherwise, follow the
 923         * regular lookup sequence.
 924         */
 925        if (filename)
 926                return git_config_from_file(fn, filename, data);
 927
 928        repo_config = git_pathdup("config");
 929        ret = git_config_early(fn, data, repo_config);
 930        if (repo_config)
 931                free(repo_config);
 932        return ret;
 933}
 934
 935int git_config(config_fn_t fn, void *data)
 936{
 937        return git_config_with_options(fn, data, NULL);
 938}
 939
 940/*
 941 * Find all the stuff for git_config_set() below.
 942 */
 943
 944#define MAX_MATCHES 512
 945
 946static struct {
 947        int baselen;
 948        char *key;
 949        int do_not_match;
 950        regex_t *value_regex;
 951        int multi_replace;
 952        size_t offset[MAX_MATCHES];
 953        enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
 954        int seen;
 955} store;
 956
 957static int matches(const char *key, const char *value)
 958{
 959        return !strcmp(key, store.key) &&
 960                (store.value_regex == NULL ||
 961                 (store.do_not_match ^
 962                  !regexec(store.value_regex, value, 0, NULL, 0)));
 963}
 964
 965static int store_aux(const char *key, const char *value, void *cb)
 966{
 967        const char *ep;
 968        size_t section_len;
 969        FILE *f = cf->f;
 970
 971        switch (store.state) {
 972        case KEY_SEEN:
 973                if (matches(key, value)) {
 974                        if (store.seen == 1 && store.multi_replace == 0) {
 975                                warning("%s has multiple values", key);
 976                        } else if (store.seen >= MAX_MATCHES) {
 977                                error("too many matches for %s", key);
 978                                return 1;
 979                        }
 980
 981                        store.offset[store.seen] = ftell(f);
 982                        store.seen++;
 983                }
 984                break;
 985        case SECTION_SEEN:
 986                /*
 987                 * What we are looking for is in store.key (both
 988                 * section and var), and its section part is baselen
 989                 * long.  We found key (again, both section and var).
 990                 * We would want to know if this key is in the same
 991                 * section as what we are looking for.  We already
 992                 * know we are in the same section as what should
 993                 * hold store.key.
 994                 */
 995                ep = strrchr(key, '.');
 996                section_len = ep - key;
 997
 998                if ((section_len != store.baselen) ||
 999                    memcmp(key, store.key, section_len+1)) {
1000                        store.state = SECTION_END_SEEN;
1001                        break;
1002                }
1003
1004                /*
1005                 * Do not increment matches: this is no match, but we
1006                 * just made sure we are in the desired section.
1007                 */
1008                store.offset[store.seen] = ftell(f);
1009                /* fallthru */
1010        case SECTION_END_SEEN:
1011        case START:
1012                if (matches(key, value)) {
1013                        store.offset[store.seen] = ftell(f);
1014                        store.state = KEY_SEEN;
1015                        store.seen++;
1016                } else {
1017                        if (strrchr(key, '.') - key == store.baselen &&
1018                              !strncmp(key, store.key, store.baselen)) {
1019                                        store.state = SECTION_SEEN;
1020                                        store.offset[store.seen] = ftell(f);
1021                        }
1022                }
1023        }
1024        return 0;
1025}
1026
1027static int write_error(const char *filename)
1028{
1029        error("failed to write new configuration file %s", filename);
1030
1031        /* Same error code as "failed to rename". */
1032        return 4;
1033}
1034
1035static int store_write_section(int fd, const char *key)
1036{
1037        const char *dot;
1038        int i, success;
1039        struct strbuf sb = STRBUF_INIT;
1040
1041        dot = memchr(key, '.', store.baselen);
1042        if (dot) {
1043                strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1044                for (i = dot - key + 1; i < store.baselen; i++) {
1045                        if (key[i] == '"' || key[i] == '\\')
1046                                strbuf_addch(&sb, '\\');
1047                        strbuf_addch(&sb, key[i]);
1048                }
1049                strbuf_addstr(&sb, "\"]\n");
1050        } else {
1051                strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1052        }
1053
1054        success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1055        strbuf_release(&sb);
1056
1057        return success;
1058}
1059
1060static int store_write_pair(int fd, const char *key, const char *value)
1061{
1062        int i, success;
1063        int length = strlen(key + store.baselen + 1);
1064        const char *quote = "";
1065        struct strbuf sb = STRBUF_INIT;
1066
1067        /*
1068         * Check to see if the value needs to be surrounded with a dq pair.
1069         * Note that problematic characters are always backslash-quoted; this
1070         * check is about not losing leading or trailing SP and strings that
1071         * follow beginning-of-comment characters (i.e. ';' and '#') by the
1072         * configuration parser.
1073         */
1074        if (value[0] == ' ')
1075                quote = "\"";
1076        for (i = 0; value[i]; i++)
1077                if (value[i] == ';' || value[i] == '#')
1078                        quote = "\"";
1079        if (i && value[i - 1] == ' ')
1080                quote = "\"";
1081
1082        strbuf_addf(&sb, "\t%.*s = %s",
1083                    length, key + store.baselen + 1, quote);
1084
1085        for (i = 0; value[i]; i++)
1086                switch (value[i]) {
1087                case '\n':
1088                        strbuf_addstr(&sb, "\\n");
1089                        break;
1090                case '\t':
1091                        strbuf_addstr(&sb, "\\t");
1092                        break;
1093                case '"':
1094                case '\\':
1095                        strbuf_addch(&sb, '\\');
1096                default:
1097                        strbuf_addch(&sb, value[i]);
1098                        break;
1099                }
1100        strbuf_addf(&sb, "%s\n", quote);
1101
1102        success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1103        strbuf_release(&sb);
1104
1105        return success;
1106}
1107
1108static ssize_t find_beginning_of_line(const char *contents, size_t size,
1109        size_t offset_, int *found_bracket)
1110{
1111        size_t equal_offset = size, bracket_offset = size;
1112        ssize_t offset;
1113
1114contline:
1115        for (offset = offset_-2; offset > 0
1116                        && contents[offset] != '\n'; offset--)
1117                switch (contents[offset]) {
1118                        case '=': equal_offset = offset; break;
1119                        case ']': bracket_offset = offset; break;
1120                }
1121        if (offset > 0 && contents[offset-1] == '\\') {
1122                offset_ = offset;
1123                goto contline;
1124        }
1125        if (bracket_offset < equal_offset) {
1126                *found_bracket = 1;
1127                offset = bracket_offset+1;
1128        } else
1129                offset++;
1130
1131        return offset;
1132}
1133
1134int git_config_set_in_file(const char *config_filename,
1135                        const char *key, const char *value)
1136{
1137        return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1138}
1139
1140int git_config_set(const char *key, const char *value)
1141{
1142        return git_config_set_multivar(key, value, NULL, 0);
1143}
1144
1145/*
1146 * Auxiliary function to sanity-check and split the key into the section
1147 * identifier and variable name.
1148 *
1149 * Returns 0 on success, -1 when there is an invalid character in the key and
1150 * -2 if there is no section name in the key.
1151 *
1152 * store_key - pointer to char* which will hold a copy of the key with
1153 *             lowercase section and variable name
1154 * baselen - pointer to int which will hold the length of the
1155 *           section + subsection part, can be NULL
1156 */
1157int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1158{
1159        int i, dot, baselen;
1160        const char *last_dot = strrchr(key, '.');
1161
1162        /*
1163         * Since "key" actually contains the section name and the real
1164         * key name separated by a dot, we have to know where the dot is.
1165         */
1166
1167        if (last_dot == NULL || last_dot == key) {
1168                error("key does not contain a section: %s", key);
1169                return -CONFIG_NO_SECTION_OR_NAME;
1170        }
1171
1172        if (!last_dot[1]) {
1173                error("key does not contain variable name: %s", key);
1174                return -CONFIG_NO_SECTION_OR_NAME;
1175        }
1176
1177        baselen = last_dot - key;
1178        if (baselen_)
1179                *baselen_ = baselen;
1180
1181        /*
1182         * Validate the key and while at it, lower case it for matching.
1183         */
1184        *store_key = xmalloc(strlen(key) + 1);
1185
1186        dot = 0;
1187        for (i = 0; key[i]; i++) {
1188                unsigned char c = key[i];
1189                if (c == '.')
1190                        dot = 1;
1191                /* Leave the extended basename untouched.. */
1192                if (!dot || i > baselen) {
1193                        if (!iskeychar(c) ||
1194                            (i == baselen + 1 && !isalpha(c))) {
1195                                error("invalid key: %s", key);
1196                                goto out_free_ret_1;
1197                        }
1198                        c = tolower(c);
1199                } else if (c == '\n') {
1200                        error("invalid key (newline): %s", key);
1201                        goto out_free_ret_1;
1202                }
1203                (*store_key)[i] = c;
1204        }
1205        (*store_key)[i] = 0;
1206
1207        return 0;
1208
1209out_free_ret_1:
1210        free(*store_key);
1211        return -CONFIG_INVALID_KEY;
1212}
1213
1214/*
1215 * If value==NULL, unset in (remove from) config,
1216 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1217 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1218 *     else all matching key/values (regardless how many) are removed,
1219 *     before the new pair is written.
1220 *
1221 * Returns 0 on success.
1222 *
1223 * This function does this:
1224 *
1225 * - it locks the config file by creating ".git/config.lock"
1226 *
1227 * - it then parses the config using store_aux() as validator to find
1228 *   the position on the key/value pair to replace. If it is to be unset,
1229 *   it must be found exactly once.
1230 *
1231 * - the config file is mmap()ed and the part before the match (if any) is
1232 *   written to the lock file, then the changed part and the rest.
1233 *
1234 * - the config file is removed and the lock file rename()d to it.
1235 *
1236 */
1237int git_config_set_multivar_in_file(const char *config_filename,
1238                                const char *key, const char *value,
1239                                const char *value_regex, int multi_replace)
1240{
1241        int fd = -1, in_fd;
1242        int ret;
1243        struct lock_file *lock = NULL;
1244        char *filename_buf = NULL;
1245
1246        /* parse-key returns negative; flip the sign to feed exit(3) */
1247        ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1248        if (ret)
1249                goto out_free;
1250
1251        store.multi_replace = multi_replace;
1252
1253        if (!config_filename)
1254                config_filename = filename_buf = git_pathdup("config");
1255
1256        /*
1257         * The lock serves a purpose in addition to locking: the new
1258         * contents of .git/config will be written into it.
1259         */
1260        lock = xcalloc(sizeof(struct lock_file), 1);
1261        fd = hold_lock_file_for_update(lock, config_filename, 0);
1262        if (fd < 0) {
1263                error("could not lock config file %s: %s", config_filename, strerror(errno));
1264                free(store.key);
1265                ret = CONFIG_NO_LOCK;
1266                goto out_free;
1267        }
1268
1269        /*
1270         * If .git/config does not exist yet, write a minimal version.
1271         */
1272        in_fd = open(config_filename, O_RDONLY);
1273        if ( in_fd < 0 ) {
1274                free(store.key);
1275
1276                if ( ENOENT != errno ) {
1277                        error("opening %s: %s", config_filename,
1278                              strerror(errno));
1279                        ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
1280                        goto out_free;
1281                }
1282                /* if nothing to unset, error out */
1283                if (value == NULL) {
1284                        ret = CONFIG_NOTHING_SET;
1285                        goto out_free;
1286                }
1287
1288                store.key = (char *)key;
1289                if (!store_write_section(fd, key) ||
1290                    !store_write_pair(fd, key, value))
1291                        goto write_err_out;
1292        } else {
1293                struct stat st;
1294                char *contents;
1295                size_t contents_sz, copy_begin, copy_end;
1296                int i, new_line = 0;
1297
1298                if (value_regex == NULL)
1299                        store.value_regex = NULL;
1300                else {
1301                        if (value_regex[0] == '!') {
1302                                store.do_not_match = 1;
1303                                value_regex++;
1304                        } else
1305                                store.do_not_match = 0;
1306
1307                        store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
1308                        if (regcomp(store.value_regex, value_regex,
1309                                        REG_EXTENDED)) {
1310                                error("invalid pattern: %s", value_regex);
1311                                free(store.value_regex);
1312                                ret = CONFIG_INVALID_PATTERN;
1313                                goto out_free;
1314                        }
1315                }
1316
1317                store.offset[0] = 0;
1318                store.state = START;
1319                store.seen = 0;
1320
1321                /*
1322                 * After this, store.offset will contain the *end* offset
1323                 * of the last match, or remain at 0 if no match was found.
1324                 * As a side effect, we make sure to transform only a valid
1325                 * existing config file.
1326                 */
1327                if (git_config_from_file(store_aux, config_filename, NULL)) {
1328                        error("invalid config file %s", config_filename);
1329                        free(store.key);
1330                        if (store.value_regex != NULL) {
1331                                regfree(store.value_regex);
1332                                free(store.value_regex);
1333                        }
1334                        ret = CONFIG_INVALID_FILE;
1335                        goto out_free;
1336                }
1337
1338                free(store.key);
1339                if (store.value_regex != NULL) {
1340                        regfree(store.value_regex);
1341                        free(store.value_regex);
1342                }
1343
1344                /* if nothing to unset, or too many matches, error out */
1345                if ((store.seen == 0 && value == NULL) ||
1346                                (store.seen > 1 && multi_replace == 0)) {
1347                        ret = CONFIG_NOTHING_SET;
1348                        goto out_free;
1349                }
1350
1351                fstat(in_fd, &st);
1352                contents_sz = xsize_t(st.st_size);
1353                contents = xmmap(NULL, contents_sz, PROT_READ,
1354                        MAP_PRIVATE, in_fd, 0);
1355                close(in_fd);
1356
1357                if (store.seen == 0)
1358                        store.seen = 1;
1359
1360                for (i = 0, copy_begin = 0; i < store.seen; i++) {
1361                        if (store.offset[i] == 0) {
1362                                store.offset[i] = copy_end = contents_sz;
1363                        } else if (store.state != KEY_SEEN) {
1364                                copy_end = store.offset[i];
1365                        } else
1366                                copy_end = find_beginning_of_line(
1367                                        contents, contents_sz,
1368                                        store.offset[i]-2, &new_line);
1369
1370                        if (copy_end > 0 && contents[copy_end-1] != '\n')
1371                                new_line = 1;
1372
1373                        /* write the first part of the config */
1374                        if (copy_end > copy_begin) {
1375                                if (write_in_full(fd, contents + copy_begin,
1376                                                  copy_end - copy_begin) <
1377                                    copy_end - copy_begin)
1378                                        goto write_err_out;
1379                                if (new_line &&
1380                                    write_str_in_full(fd, "\n") != 1)
1381                                        goto write_err_out;
1382                        }
1383                        copy_begin = store.offset[i];
1384                }
1385
1386                /* write the pair (value == NULL means unset) */
1387                if (value != NULL) {
1388                        if (store.state == START) {
1389                                if (!store_write_section(fd, key))
1390                                        goto write_err_out;
1391                        }
1392                        if (!store_write_pair(fd, key, value))
1393                                goto write_err_out;
1394                }
1395
1396                /* write the rest of the config */
1397                if (copy_begin < contents_sz)
1398                        if (write_in_full(fd, contents + copy_begin,
1399                                          contents_sz - copy_begin) <
1400                            contents_sz - copy_begin)
1401                                goto write_err_out;
1402
1403                munmap(contents, contents_sz);
1404        }
1405
1406        if (commit_lock_file(lock) < 0) {
1407                error("could not commit config file %s", config_filename);
1408                ret = CONFIG_NO_WRITE;
1409                goto out_free;
1410        }
1411
1412        /*
1413         * lock is committed, so don't try to roll it back below.
1414         * NOTE: Since lockfile.c keeps a linked list of all created
1415         * lock_file structures, it isn't safe to free(lock).  It's
1416         * better to just leave it hanging around.
1417         */
1418        lock = NULL;
1419        ret = 0;
1420
1421out_free:
1422        if (lock)
1423                rollback_lock_file(lock);
1424        free(filename_buf);
1425        return ret;
1426
1427write_err_out:
1428        ret = write_error(lock->filename);
1429        goto out_free;
1430
1431}
1432
1433int git_config_set_multivar(const char *key, const char *value,
1434                        const char *value_regex, int multi_replace)
1435{
1436        return git_config_set_multivar_in_file(NULL, key, value, value_regex,
1437                                               multi_replace);
1438}
1439
1440static int section_name_match (const char *buf, const char *name)
1441{
1442        int i = 0, j = 0, dot = 0;
1443        if (buf[i] != '[')
1444                return 0;
1445        for (i = 1; buf[i] && buf[i] != ']'; i++) {
1446                if (!dot && isspace(buf[i])) {
1447                        dot = 1;
1448                        if (name[j++] != '.')
1449                                break;
1450                        for (i++; isspace(buf[i]); i++)
1451                                ; /* do nothing */
1452                        if (buf[i] != '"')
1453                                break;
1454                        continue;
1455                }
1456                if (buf[i] == '\\' && dot)
1457                        i++;
1458                else if (buf[i] == '"' && dot) {
1459                        for (i++; isspace(buf[i]); i++)
1460                                ; /* do_nothing */
1461                        break;
1462                }
1463                if (buf[i] != name[j++])
1464                        break;
1465        }
1466        if (buf[i] == ']' && name[j] == 0) {
1467                /*
1468                 * We match, now just find the right length offset by
1469                 * gobbling up any whitespace after it, as well
1470                 */
1471                i++;
1472                for (; buf[i] && isspace(buf[i]); i++)
1473                        ; /* do nothing */
1474                return i;
1475        }
1476        return 0;
1477}
1478
1479/* if new_name == NULL, the section is removed instead */
1480int git_config_rename_section_in_file(const char *config_filename,
1481                                      const char *old_name, const char *new_name)
1482{
1483        int ret = 0, remove = 0;
1484        char *filename_buf = NULL;
1485        struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1486        int out_fd;
1487        char buf[1024];
1488        FILE *config_file;
1489
1490        if (!config_filename)
1491                config_filename = filename_buf = git_pathdup("config");
1492
1493        out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1494        if (out_fd < 0) {
1495                ret = error("could not lock config file %s", config_filename);
1496                goto out;
1497        }
1498
1499        if (!(config_file = fopen(config_filename, "rb"))) {
1500                /* no config file means nothing to rename, no error */
1501                goto unlock_and_out;
1502        }
1503
1504        while (fgets(buf, sizeof(buf), config_file)) {
1505                int i;
1506                int length;
1507                char *output = buf;
1508                for (i = 0; buf[i] && isspace(buf[i]); i++)
1509                        ; /* do nothing */
1510                if (buf[i] == '[') {
1511                        /* it's a section */
1512                        int offset = section_name_match(&buf[i], old_name);
1513                        if (offset > 0) {
1514                                ret++;
1515                                if (new_name == NULL) {
1516                                        remove = 1;
1517                                        continue;
1518                                }
1519                                store.baselen = strlen(new_name);
1520                                if (!store_write_section(out_fd, new_name)) {
1521                                        ret = write_error(lock->filename);
1522                                        goto out;
1523                                }
1524                                /*
1525                                 * We wrote out the new section, with
1526                                 * a newline, now skip the old
1527                                 * section's length
1528                                 */
1529                                output += offset + i;
1530                                if (strlen(output) > 0) {
1531                                        /*
1532                                         * More content means there's
1533                                         * a declaration to put on the
1534                                         * next line; indent with a
1535                                         * tab
1536                                         */
1537                                        output -= 1;
1538                                        output[0] = '\t';
1539                                }
1540                        }
1541                        remove = 0;
1542                }
1543                if (remove)
1544                        continue;
1545                length = strlen(output);
1546                if (write_in_full(out_fd, output, length) != length) {
1547                        ret = write_error(lock->filename);
1548                        goto out;
1549                }
1550        }
1551        fclose(config_file);
1552unlock_and_out:
1553        if (commit_lock_file(lock) < 0)
1554                ret = error("could not commit config file %s", config_filename);
1555out:
1556        free(filename_buf);
1557        return ret;
1558}
1559
1560int git_config_rename_section(const char *old_name, const char *new_name)
1561{
1562        return git_config_rename_section_in_file(NULL, old_name, new_name);
1563}
1564
1565/*
1566 * Call this to report error for your variable that should not
1567 * get a boolean value (i.e. "[my] var" means "true").
1568 */
1569int config_error_nonbool(const char *var)
1570{
1571        return error("Missing value for '%s'", var);
1572}