Andrew's git / gitweb.git / config.c
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config.con commit do not write null sha1s to on-disk index (4337b58)
   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
  29const char *config_exclusive_filename = NULL;
  30
  31static void lowercase(char *p)
  32{
  33        for (; *p; p++)
  34                *p = tolower(*p);
  35}
  36
  37void 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
  50int git_config_parse_parameter(const char *text,
  51                               config_fn_t fn, void *data)
  52{
  53        struct strbuf **pair;
  54        pair = strbuf_split_str(text, '=', 2);
  55        if (!pair[0])
  56                return error("bogus config parameter: %s", text);
  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
  73int 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
 104static 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
 130static 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                                cf->linenr--;
 140                                return NULL;
 141                        }
 142                        return cf->value.buf;
 143                }
 144                if (comment)
 145                        continue;
 146                if (isspace(c) && !quote) {
 147                        if (cf->value.len)
 148                                space++;
 149                        continue;
 150                }
 151                if (!quote) {
 152                        if (c == ';' || c == '#') {
 153                                comment = 1;
 154                                continue;
 155                        }
 156                }
 157                for (; space; space--)
 158                        strbuf_addch(&cf->value, ' ');
 159                if (c == '\\') {
 160                        c = get_next_char();
 161                        switch (c) {
 162                        case '\n':
 163                                continue;
 164                        case 't':
 165                                c = '\t';
 166                                break;
 167                        case 'b':
 168                                c = '\b';
 169                                break;
 170                        case 'n':
 171                                c = '\n';
 172                                break;
 173                        /* Some characters escape as themselves */
 174                        case '\\': case '"':
 175                                break;
 176                        /* Reject unknown escape sequences */
 177                        default:
 178                                return NULL;
 179                        }
 180                        strbuf_addch(&cf->value, c);
 181                        continue;
 182                }
 183                if (c == '"') {
 184                        quote = 1-quote;
 185                        continue;
 186                }
 187                strbuf_addch(&cf->value, c);
 188        }
 189}
 190
 191static inline int iskeychar(int c)
 192{
 193        return isalnum(c) || c == '-';
 194}
 195
 196static int get_value(config_fn_t fn, void *data, char *name, unsigned int len)
 197{
 198        int c;
 199        char *value;
 200
 201        /* Get the full name */
 202        for (;;) {
 203                c = get_next_char();
 204                if (cf->eof)
 205                        break;
 206                if (!iskeychar(c))
 207                        break;
 208                name[len++] = tolower(c);
 209                if (len >= MAXNAME)
 210                        return -1;
 211        }
 212        name[len] = 0;
 213        while (c == ' ' || c == '\t')
 214                c = get_next_char();
 215
 216        value = NULL;
 217        if (c != '\n') {
 218                if (c != '=')
 219                        return -1;
 220                value = parse_value();
 221                if (!value)
 222                        return -1;
 223        }
 224        return fn(name, value, data);
 225}
 226
 227static int get_extended_base_var(char *name, int baselen, int c)
 228{
 229        do {
 230                if (c == '\n')
 231                        goto error_incomplete_line;
 232                c = get_next_char();
 233        } while (isspace(c));
 234
 235        /* We require the format to be '[base "extension"]' */
 236        if (c != '"')
 237                return -1;
 238        name[baselen++] = '.';
 239
 240        for (;;) {
 241                int c = get_next_char();
 242                if (c == '\n')
 243                        goto error_incomplete_line;
 244                if (c == '"')
 245                        break;
 246                if (c == '\\') {
 247                        c = get_next_char();
 248                        if (c == '\n')
 249                                goto error_incomplete_line;
 250                }
 251                name[baselen++] = c;
 252                if (baselen > MAXNAME / 2)
 253                        return -1;
 254        }
 255
 256        /* Final ']' */
 257        if (get_next_char() != ']')
 258                return -1;
 259        return baselen;
 260error_incomplete_line:
 261        cf->linenr--;
 262        return -1;
 263}
 264
 265static int get_base_var(char *name)
 266{
 267        int baselen = 0;
 268
 269        for (;;) {
 270                int c = get_next_char();
 271                if (cf->eof)
 272                        return -1;
 273                if (c == ']')
 274                        return baselen;
 275                if (isspace(c))
 276                        return get_extended_base_var(name, baselen, c);
 277                if (!iskeychar(c) && c != '.')
 278                        return -1;
 279                if (baselen > MAXNAME / 2)
 280                        return -1;
 281                name[baselen++] = tolower(c);
 282        }
 283}
 284
 285static int git_parse_file(config_fn_t fn, void *data)
 286{
 287        int comment = 0;
 288        int baselen = 0;
 289        char *var = cf->var;
 290
 291        /* U+FEFF Byte Order Mark in UTF8 */
 292        static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
 293        const unsigned char *bomptr = utf8_bom;
 294
 295        for (;;) {
 296                int c = get_next_char();
 297                if (bomptr && *bomptr) {
 298                        /* We are at the file beginning; skip UTF8-encoded BOM
 299                         * if present. Sane editors won't put this in on their
 300                         * own, but e.g. Windows Notepad will do it happily. */
 301                        if ((unsigned char) c == *bomptr) {
 302                                bomptr++;
 303                                continue;
 304                        } else {
 305                                /* Do not tolerate partial BOM. */
 306                                if (bomptr != utf8_bom)
 307                                        break;
 308                                /* No BOM at file beginning. Cool. */
 309                                bomptr = NULL;
 310                        }
 311                }
 312                if (c == '\n') {
 313                        if (cf->eof)
 314                                return 0;
 315                        comment = 0;
 316                        continue;
 317                }
 318                if (comment || isspace(c))
 319                        continue;
 320                if (c == '#' || c == ';') {
 321                        comment = 1;
 322                        continue;
 323                }
 324                if (c == '[') {
 325                        baselen = get_base_var(var);
 326                        if (baselen <= 0)
 327                                break;
 328                        var[baselen++] = '.';
 329                        var[baselen] = 0;
 330                        continue;
 331                }
 332                if (!isalpha(c))
 333                        break;
 334                var[baselen] = tolower(c);
 335                if (get_value(fn, data, var, baselen+1) < 0)
 336                        break;
 337        }
 338        die("bad config file line %d in %s", cf->linenr, cf->name);
 339}
 340
 341static int parse_unit_factor(const char *end, uintmax_t *val)
 342{
 343        if (!*end)
 344                return 1;
 345        else if (!strcasecmp(end, "k")) {
 346                *val *= 1024;
 347                return 1;
 348        }
 349        else if (!strcasecmp(end, "m")) {
 350                *val *= 1024 * 1024;
 351                return 1;
 352        }
 353        else if (!strcasecmp(end, "g")) {
 354                *val *= 1024 * 1024 * 1024;
 355                return 1;
 356        }
 357        return 0;
 358}
 359
 360static int git_parse_long(const char *value, long *ret)
 361{
 362        if (value && *value) {
 363                char *end;
 364                intmax_t val;
 365                uintmax_t uval;
 366                uintmax_t factor = 1;
 367
 368                errno = 0;
 369                val = strtoimax(value, &end, 0);
 370                if (errno == ERANGE)
 371                        return 0;
 372                if (!parse_unit_factor(end, &factor))
 373                        return 0;
 374                uval = abs(val);
 375                uval *= factor;
 376                if ((uval > maximum_signed_value_of_type(long)) ||
 377                    (abs(val) > uval))
 378                        return 0;
 379                val *= factor;
 380                *ret = val;
 381                return 1;
 382        }
 383        return 0;
 384}
 385
 386int git_parse_ulong(const char *value, unsigned long *ret)
 387{
 388        if (value && *value) {
 389                char *end;
 390                uintmax_t val;
 391                uintmax_t oldval;
 392
 393                errno = 0;
 394                val = strtoumax(value, &end, 0);
 395                if (errno == ERANGE)
 396                        return 0;
 397                oldval = val;
 398                if (!parse_unit_factor(end, &val))
 399                        return 0;
 400                if ((val > maximum_unsigned_value_of_type(long)) ||
 401                    (oldval > val))
 402                        return 0;
 403                *ret = val;
 404                return 1;
 405        }
 406        return 0;
 407}
 408
 409static void die_bad_config(const char *name)
 410{
 411        if (cf && cf->name)
 412                die("bad config value for '%s' in %s", name, cf->name);
 413        die("bad config value for '%s'", name);
 414}
 415
 416int git_config_int(const char *name, const char *value)
 417{
 418        long ret = 0;
 419        if (!git_parse_long(value, &ret))
 420                die_bad_config(name);
 421        return ret;
 422}
 423
 424unsigned long git_config_ulong(const char *name, const char *value)
 425{
 426        unsigned long ret;
 427        if (!git_parse_ulong(value, &ret))
 428                die_bad_config(name);
 429        return ret;
 430}
 431
 432static int git_config_maybe_bool_text(const char *name, const char *value)
 433{
 434        if (!value)
 435                return 1;
 436        if (!*value)
 437                return 0;
 438        if (!strcasecmp(value, "true")
 439            || !strcasecmp(value, "yes")
 440            || !strcasecmp(value, "on"))
 441                return 1;
 442        if (!strcasecmp(value, "false")
 443            || !strcasecmp(value, "no")
 444            || !strcasecmp(value, "off"))
 445                return 0;
 446        return -1;
 447}
 448
 449int git_config_maybe_bool(const char *name, const char *value)
 450{
 451        long v = git_config_maybe_bool_text(name, value);
 452        if (0 <= v)
 453                return v;
 454        if (git_parse_long(value, &v))
 455                return !!v;
 456        return -1;
 457}
 458
 459int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
 460{
 461        int v = git_config_maybe_bool_text(name, value);
 462        if (0 <= v) {
 463                *is_bool = 1;
 464                return v;
 465        }
 466        *is_bool = 0;
 467        return git_config_int(name, value);
 468}
 469
 470int git_config_bool(const char *name, const char *value)
 471{
 472        int discard;
 473        return !!git_config_bool_or_int(name, value, &discard);
 474}
 475
 476int git_config_string(const char **dest, const char *var, const char *value)
 477{
 478        if (!value)
 479                return config_error_nonbool(var);
 480        *dest = xstrdup(value);
 481        return 0;
 482}
 483
 484int git_config_pathname(const char **dest, const char *var, const char *value)
 485{
 486        if (!value)
 487                return config_error_nonbool(var);
 488        *dest = expand_user_path(value);
 489        if (!*dest)
 490                die("Failed to expand user dir in: '%s'", value);
 491        return 0;
 492}
 493
 494static int git_default_core_config(const char *var, const char *value)
 495{
 496        /* This needs a better name */
 497        if (!strcmp(var, "core.filemode")) {
 498                trust_executable_bit = git_config_bool(var, value);
 499                return 0;
 500        }
 501        if (!strcmp(var, "core.trustctime")) {
 502                trust_ctime = git_config_bool(var, value);
 503                return 0;
 504        }
 505
 506        if (!strcmp(var, "core.quotepath")) {
 507                quote_path_fully = git_config_bool(var, value);
 508                return 0;
 509        }
 510
 511        if (!strcmp(var, "core.symlinks")) {
 512                has_symlinks = git_config_bool(var, value);
 513                return 0;
 514        }
 515
 516        if (!strcmp(var, "core.ignorecase")) {
 517                ignore_case = git_config_bool(var, value);
 518                return 0;
 519        }
 520
 521        if (!strcmp(var, "core.attributesfile"))
 522                return git_config_pathname(&git_attributes_file, var, value);
 523
 524        if (!strcmp(var, "core.bare")) {
 525                is_bare_repository_cfg = git_config_bool(var, value);
 526                return 0;
 527        }
 528
 529        if (!strcmp(var, "core.ignorestat")) {
 530                assume_unchanged = git_config_bool(var, value);
 531                return 0;
 532        }
 533
 534        if (!strcmp(var, "core.prefersymlinkrefs")) {
 535                prefer_symlink_refs = git_config_bool(var, value);
 536                return 0;
 537        }
 538
 539        if (!strcmp(var, "core.logallrefupdates")) {
 540                log_all_ref_updates = git_config_bool(var, value);
 541                return 0;
 542        }
 543
 544        if (!strcmp(var, "core.warnambiguousrefs")) {
 545                warn_ambiguous_refs = git_config_bool(var, value);
 546                return 0;
 547        }
 548
 549        if (!strcmp(var, "core.abbrev")) {
 550                int abbrev = git_config_int(var, value);
 551                if (abbrev < minimum_abbrev || abbrev > 40)
 552                        return -1;
 553                default_abbrev = abbrev;
 554                return 0;
 555        }
 556
 557        if (!strcmp(var, "core.loosecompression")) {
 558                int level = git_config_int(var, value);
 559                if (level == -1)
 560                        level = Z_DEFAULT_COMPRESSION;
 561                else if (level < 0 || level > Z_BEST_COMPRESSION)
 562                        die("bad zlib compression level %d", level);
 563                zlib_compression_level = level;
 564                zlib_compression_seen = 1;
 565                return 0;
 566        }
 567
 568        if (!strcmp(var, "core.compression")) {
 569                int level = git_config_int(var, value);
 570                if (level == -1)
 571                        level = Z_DEFAULT_COMPRESSION;
 572                else if (level < 0 || level > Z_BEST_COMPRESSION)
 573                        die("bad zlib compression level %d", level);
 574                core_compression_level = level;
 575                core_compression_seen = 1;
 576                if (!zlib_compression_seen)
 577                        zlib_compression_level = level;
 578                return 0;
 579        }
 580
 581        if (!strcmp(var, "core.packedgitwindowsize")) {
 582                int pgsz_x2 = getpagesize() * 2;
 583                packed_git_window_size = git_config_ulong(var, value);
 584
 585                /* This value must be multiple of (pagesize * 2) */
 586                packed_git_window_size /= pgsz_x2;
 587                if (packed_git_window_size < 1)
 588                        packed_git_window_size = 1;
 589                packed_git_window_size *= pgsz_x2;
 590                return 0;
 591        }
 592
 593        if (!strcmp(var, "core.bigfilethreshold")) {
 594                big_file_threshold = git_config_ulong(var, value);
 595                return 0;
 596        }
 597
 598        if (!strcmp(var, "core.packedgitlimit")) {
 599                packed_git_limit = git_config_ulong(var, value);
 600                return 0;
 601        }
 602
 603        if (!strcmp(var, "core.deltabasecachelimit")) {
 604                delta_base_cache_limit = git_config_ulong(var, value);
 605                return 0;
 606        }
 607
 608        if (!strcmp(var, "core.logpackaccess"))
 609                return git_config_string(&log_pack_access, var, value);
 610
 611        if (!strcmp(var, "core.autocrlf")) {
 612                if (value && !strcasecmp(value, "input")) {
 613                        if (core_eol == EOL_CRLF)
 614                                return error("core.autocrlf=input conflicts with core.eol=crlf");
 615                        auto_crlf = AUTO_CRLF_INPUT;
 616                        return 0;
 617                }
 618                auto_crlf = git_config_bool(var, value);
 619                return 0;
 620        }
 621
 622        if (!strcmp(var, "core.safecrlf")) {
 623                if (value && !strcasecmp(value, "warn")) {
 624                        safe_crlf = SAFE_CRLF_WARN;
 625                        return 0;
 626                }
 627                safe_crlf = git_config_bool(var, value);
 628                return 0;
 629        }
 630
 631        if (!strcmp(var, "core.eol")) {
 632                if (value && !strcasecmp(value, "lf"))
 633                        core_eol = EOL_LF;
 634                else if (value && !strcasecmp(value, "crlf"))
 635                        core_eol = EOL_CRLF;
 636                else if (value && !strcasecmp(value, "native"))
 637                        core_eol = EOL_NATIVE;
 638                else
 639                        core_eol = EOL_UNSET;
 640                if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
 641                        return error("core.autocrlf=input conflicts with core.eol=crlf");
 642                return 0;
 643        }
 644
 645        if (!strcmp(var, "core.notesref")) {
 646                notes_ref_name = xstrdup(value);
 647                return 0;
 648        }
 649
 650        if (!strcmp(var, "core.pager"))
 651                return git_config_string(&pager_program, var, value);
 652
 653        if (!strcmp(var, "core.editor"))
 654                return git_config_string(&editor_program, var, value);
 655
 656        if (!strcmp(var, "core.askpass"))
 657                return git_config_string(&askpass_program, var, value);
 658
 659        if (!strcmp(var, "core.excludesfile"))
 660                return git_config_pathname(&excludes_file, var, value);
 661
 662        if (!strcmp(var, "core.whitespace")) {
 663                if (!value)
 664                        return config_error_nonbool(var);
 665                whitespace_rule_cfg = parse_whitespace_rule(value);
 666                return 0;
 667        }
 668
 669        if (!strcmp(var, "core.fsyncobjectfiles")) {
 670                fsync_object_files = git_config_bool(var, value);
 671                return 0;
 672        }
 673
 674        if (!strcmp(var, "core.preloadindex")) {
 675                core_preload_index = git_config_bool(var, value);
 676                return 0;
 677        }
 678
 679        if (!strcmp(var, "core.createobject")) {
 680                if (!strcmp(value, "rename"))
 681                        object_creation_mode = OBJECT_CREATION_USES_RENAMES;
 682                else if (!strcmp(value, "link"))
 683                        object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
 684                else
 685                        die("Invalid mode for object creation: %s", value);
 686                return 0;
 687        }
 688
 689        if (!strcmp(var, "core.sparsecheckout")) {
 690                core_apply_sparse_checkout = git_config_bool(var, value);
 691                return 0;
 692        }
 693
 694        /* Add other config variables here and to Documentation/config.txt. */
 695        return 0;
 696}
 697
 698static int git_default_user_config(const char *var, const char *value)
 699{
 700        if (!strcmp(var, "user.name")) {
 701                if (!value)
 702                        return config_error_nonbool(var);
 703                strlcpy(git_default_name, value, sizeof(git_default_name));
 704                user_ident_explicitly_given |= IDENT_NAME_GIVEN;
 705                return 0;
 706        }
 707
 708        if (!strcmp(var, "user.email")) {
 709                if (!value)
 710                        return config_error_nonbool(var);
 711                strlcpy(git_default_email, value, sizeof(git_default_email));
 712                user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
 713                return 0;
 714        }
 715
 716        /* Add other config variables here and to Documentation/config.txt. */
 717        return 0;
 718}
 719
 720static int git_default_i18n_config(const char *var, const char *value)
 721{
 722        if (!strcmp(var, "i18n.commitencoding"))
 723                return git_config_string(&git_commit_encoding, var, value);
 724
 725        if (!strcmp(var, "i18n.logoutputencoding"))
 726                return git_config_string(&git_log_output_encoding, var, value);
 727
 728        /* Add other config variables here and to Documentation/config.txt. */
 729        return 0;
 730}
 731
 732static int git_default_branch_config(const char *var, const char *value)
 733{
 734        if (!strcmp(var, "branch.autosetupmerge")) {
 735                if (value && !strcasecmp(value, "always")) {
 736                        git_branch_track = BRANCH_TRACK_ALWAYS;
 737                        return 0;
 738                }
 739                git_branch_track = git_config_bool(var, value);
 740                return 0;
 741        }
 742        if (!strcmp(var, "branch.autosetuprebase")) {
 743                if (!value)
 744                        return config_error_nonbool(var);
 745                else if (!strcmp(value, "never"))
 746                        autorebase = AUTOREBASE_NEVER;
 747                else if (!strcmp(value, "local"))
 748                        autorebase = AUTOREBASE_LOCAL;
 749                else if (!strcmp(value, "remote"))
 750                        autorebase = AUTOREBASE_REMOTE;
 751                else if (!strcmp(value, "always"))
 752                        autorebase = AUTOREBASE_ALWAYS;
 753                else
 754                        return error("Malformed value for %s", var);
 755                return 0;
 756        }
 757
 758        /* Add other config variables here and to Documentation/config.txt. */
 759        return 0;
 760}
 761
 762static int git_default_push_config(const char *var, const char *value)
 763{
 764        if (!strcmp(var, "push.default")) {
 765                if (!value)
 766                        return config_error_nonbool(var);
 767                else if (!strcmp(value, "nothing"))
 768                        push_default = PUSH_DEFAULT_NOTHING;
 769                else if (!strcmp(value, "matching"))
 770                        push_default = PUSH_DEFAULT_MATCHING;
 771                else if (!strcmp(value, "upstream"))
 772                        push_default = PUSH_DEFAULT_UPSTREAM;
 773                else if (!strcmp(value, "tracking")) /* deprecated */
 774                        push_default = PUSH_DEFAULT_UPSTREAM;
 775                else if (!strcmp(value, "current"))
 776                        push_default = PUSH_DEFAULT_CURRENT;
 777                else {
 778                        error("Malformed value for %s: %s", var, value);
 779                        return error("Must be one of nothing, matching, "
 780                                     "tracking or current.");
 781                }
 782                return 0;
 783        }
 784
 785        /* Add other config variables here and to Documentation/config.txt. */
 786        return 0;
 787}
 788
 789static int git_default_mailmap_config(const char *var, const char *value)
 790{
 791        if (!strcmp(var, "mailmap.file"))
 792                return git_config_string(&git_mailmap_file, var, value);
 793
 794        /* Add other config variables here and to Documentation/config.txt. */
 795        return 0;
 796}
 797
 798int git_default_config(const char *var, const char *value, void *dummy)
 799{
 800        if (!prefixcmp(var, "core."))
 801                return git_default_core_config(var, value);
 802
 803        if (!prefixcmp(var, "user."))
 804                return git_default_user_config(var, value);
 805
 806        if (!prefixcmp(var, "i18n."))
 807                return git_default_i18n_config(var, value);
 808
 809        if (!prefixcmp(var, "branch."))
 810                return git_default_branch_config(var, value);
 811
 812        if (!prefixcmp(var, "push."))
 813                return git_default_push_config(var, value);
 814
 815        if (!prefixcmp(var, "mailmap."))
 816                return git_default_mailmap_config(var, value);
 817
 818        if (!prefixcmp(var, "advice."))
 819                return git_default_advice_config(var, value);
 820
 821        if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
 822                pager_use_color = git_config_bool(var,value);
 823                return 0;
 824        }
 825
 826        if (!strcmp(var, "pack.packsizelimit")) {
 827                pack_size_limit_cfg = git_config_ulong(var, value);
 828                return 0;
 829        }
 830        /* Add other config variables here and to Documentation/config.txt. */
 831        return 0;
 832}
 833
 834int git_config_from_file(config_fn_t fn, const char *filename, void *data)
 835{
 836        int ret;
 837        FILE *f = fopen(filename, "r");
 838
 839        ret = -1;
 840        if (f) {
 841                config_file top;
 842
 843                /* push config-file parsing state stack */
 844                top.prev = cf;
 845                top.f = f;
 846                top.name = filename;
 847                top.linenr = 1;
 848                top.eof = 0;
 849                strbuf_init(&top.value, 1024);
 850                cf = &top;
 851
 852                ret = git_parse_file(fn, data);
 853
 854                /* pop config-file parsing state stack */
 855                strbuf_release(&top.value);
 856                cf = top.prev;
 857
 858                fclose(f);
 859        }
 860        return ret;
 861}
 862
 863const char *git_etc_gitconfig(void)
 864{
 865        static const char *system_wide;
 866        if (!system_wide)
 867                system_wide = system_path(ETC_GITCONFIG);
 868        return system_wide;
 869}
 870
 871int git_env_bool(const char *k, int def)
 872{
 873        const char *v = getenv(k);
 874        return v ? git_config_bool(k, v) : def;
 875}
 876
 877int git_config_system(void)
 878{
 879        return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
 880}
 881
 882int git_config_early(config_fn_t fn, void *data, const char *repo_config)
 883{
 884        int ret = 0, found = 0;
 885        const char *home = NULL;
 886
 887        /* Setting $GIT_CONFIG makes git read _only_ the given config file. */
 888        if (config_exclusive_filename)
 889                return git_config_from_file(fn, config_exclusive_filename, data);
 890        if (git_config_system() && !access(git_etc_gitconfig(), R_OK)) {
 891                ret += git_config_from_file(fn, git_etc_gitconfig(),
 892                                            data);
 893                found += 1;
 894        }
 895
 896        home = getenv("HOME");
 897        if (home) {
 898                char buf[PATH_MAX];
 899                char *user_config = mksnpath(buf, sizeof(buf), "%s/.gitconfig", home);
 900                if (!access(user_config, R_OK)) {
 901                        ret += git_config_from_file(fn, user_config, data);
 902                        found += 1;
 903                }
 904        }
 905
 906        if (repo_config && !access(repo_config, R_OK)) {
 907                ret += git_config_from_file(fn, repo_config, data);
 908                found += 1;
 909        }
 910
 911        switch (git_config_from_parameters(fn, data)) {
 912        case -1: /* error */
 913                die("unable to parse command-line config");
 914                break;
 915        case 0: /* found nothing */
 916                break;
 917        default: /* found at least one item */
 918                found++;
 919                break;
 920        }
 921
 922        return ret == 0 ? found : ret;
 923}
 924
 925int git_config(config_fn_t fn, void *data)
 926{
 927        char *repo_config = NULL;
 928        int ret;
 929
 930        repo_config = git_pathdup("config");
 931        ret = git_config_early(fn, data, repo_config);
 932        if (repo_config)
 933                free(repo_config);
 934        return ret;
 935}
 936
 937/*
 938 * Find all the stuff for git_config_set() below.
 939 */
 940
 941#define MAX_MATCHES 512
 942
 943static struct {
 944        int baselen;
 945        char *key;
 946        int do_not_match;
 947        regex_t *value_regex;
 948        int multi_replace;
 949        size_t offset[MAX_MATCHES];
 950        enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
 951        int seen;
 952} store;
 953
 954static int matches(const char *key, const char *value)
 955{
 956        return !strcmp(key, store.key) &&
 957                (store.value_regex == NULL ||
 958                 (store.do_not_match ^
 959                  !regexec(store.value_regex, value, 0, NULL, 0)));
 960}
 961
 962static int store_aux(const char *key, const char *value, void *cb)
 963{
 964        const char *ep;
 965        size_t section_len;
 966        FILE *f = cf->f;
 967
 968        switch (store.state) {
 969        case KEY_SEEN:
 970                if (matches(key, value)) {
 971                        if (store.seen == 1 && store.multi_replace == 0) {
 972                                warning("%s has multiple values", key);
 973                        } else if (store.seen >= MAX_MATCHES) {
 974                                error("too many matches for %s", key);
 975                                return 1;
 976                        }
 977
 978                        store.offset[store.seen] = ftell(f);
 979                        store.seen++;
 980                }
 981                break;
 982        case SECTION_SEEN:
 983                /*
 984                 * What we are looking for is in store.key (both
 985                 * section and var), and its section part is baselen
 986                 * long.  We found key (again, both section and var).
 987                 * We would want to know if this key is in the same
 988                 * section as what we are looking for.  We already
 989                 * know we are in the same section as what should
 990                 * hold store.key.
 991                 */
 992                ep = strrchr(key, '.');
 993                section_len = ep - key;
 994
 995                if ((section_len != store.baselen) ||
 996                    memcmp(key, store.key, section_len+1)) {
 997                        store.state = SECTION_END_SEEN;
 998                        break;
 999                }
1000
1001                /*
1002                 * Do not increment matches: this is no match, but we
1003                 * just made sure we are in the desired section.
1004                 */
1005                store.offset[store.seen] = ftell(f);
1006                /* fallthru */
1007        case SECTION_END_SEEN:
1008        case START:
1009                if (matches(key, value)) {
1010                        store.offset[store.seen] = ftell(f);
1011                        store.state = KEY_SEEN;
1012                        store.seen++;
1013                } else {
1014                        if (strrchr(key, '.') - key == store.baselen &&
1015                              !strncmp(key, store.key, store.baselen)) {
1016                                        store.state = SECTION_SEEN;
1017                                        store.offset[store.seen] = ftell(f);
1018                        }
1019                }
1020        }
1021        return 0;
1022}
1023
1024static int write_error(const char *filename)
1025{
1026        error("failed to write new configuration file %s", filename);
1027
1028        /* Same error code as "failed to rename". */
1029        return 4;
1030}
1031
1032static int store_write_section(int fd, const char *key)
1033{
1034        const char *dot;
1035        int i, success;
1036        struct strbuf sb = STRBUF_INIT;
1037
1038        dot = memchr(key, '.', store.baselen);
1039        if (dot) {
1040                strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1041                for (i = dot - key + 1; i < store.baselen; i++) {
1042                        if (key[i] == '"' || key[i] == '\\')
1043                                strbuf_addch(&sb, '\\');
1044                        strbuf_addch(&sb, key[i]);
1045                }
1046                strbuf_addstr(&sb, "\"]\n");
1047        } else {
1048                strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1049        }
1050
1051        success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1052        strbuf_release(&sb);
1053
1054        return success;
1055}
1056
1057static int store_write_pair(int fd, const char *key, const char *value)
1058{
1059        int i, success;
1060        int length = strlen(key + store.baselen + 1);
1061        const char *quote = "";
1062        struct strbuf sb = STRBUF_INIT;
1063
1064        /*
1065         * Check to see if the value needs to be surrounded with a dq pair.
1066         * Note that problematic characters are always backslash-quoted; this
1067         * check is about not losing leading or trailing SP and strings that
1068         * follow beginning-of-comment characters (i.e. ';' and '#') by the
1069         * configuration parser.
1070         */
1071        if (value[0] == ' ')
1072                quote = "\"";
1073        for (i = 0; value[i]; i++)
1074                if (value[i] == ';' || value[i] == '#')
1075                        quote = "\"";
1076        if (i && value[i - 1] == ' ')
1077                quote = "\"";
1078
1079        strbuf_addf(&sb, "\t%.*s = %s",
1080                    length, key + store.baselen + 1, quote);
1081
1082        for (i = 0; value[i]; i++)
1083                switch (value[i]) {
1084                case '\n':
1085                        strbuf_addstr(&sb, "\\n");
1086                        break;
1087                case '\t':
1088                        strbuf_addstr(&sb, "\\t");
1089                        break;
1090                case '"':
1091                case '\\':
1092                        strbuf_addch(&sb, '\\');
1093                default:
1094                        strbuf_addch(&sb, value[i]);
1095                        break;
1096                }
1097        strbuf_addf(&sb, "%s\n", quote);
1098
1099        success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1100        strbuf_release(&sb);
1101
1102        return success;
1103}
1104
1105static ssize_t find_beginning_of_line(const char *contents, size_t size,
1106        size_t offset_, int *found_bracket)
1107{
1108        size_t equal_offset = size, bracket_offset = size;
1109        ssize_t offset;
1110
1111contline:
1112        for (offset = offset_-2; offset > 0
1113                        && contents[offset] != '\n'; offset--)
1114                switch (contents[offset]) {
1115                        case '=': equal_offset = offset; break;
1116                        case ']': bracket_offset = offset; break;
1117                }
1118        if (offset > 0 && contents[offset-1] == '\\') {
1119                offset_ = offset;
1120                goto contline;
1121        }
1122        if (bracket_offset < equal_offset) {
1123                *found_bracket = 1;
1124                offset = bracket_offset+1;
1125        } else
1126                offset++;
1127
1128        return offset;
1129}
1130
1131int git_config_set_in_file(const char *config_filename,
1132                        const char *key, const char *value)
1133{
1134        return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1135}
1136
1137int git_config_set(const char *key, const char *value)
1138{
1139        return git_config_set_multivar(key, value, NULL, 0);
1140}
1141
1142/*
1143 * Auxiliary function to sanity-check and split the key into the section
1144 * identifier and variable name.
1145 *
1146 * Returns 0 on success, -1 when there is an invalid character in the key and
1147 * -2 if there is no section name in the key.
1148 *
1149 * store_key - pointer to char* which will hold a copy of the key with
1150 *             lowercase section and variable name
1151 * baselen - pointer to int which will hold the length of the
1152 *           section + subsection part, can be NULL
1153 */
1154int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1155{
1156        int i, dot, baselen;
1157        const char *last_dot = strrchr(key, '.');
1158
1159        /*
1160         * Since "key" actually contains the section name and the real
1161         * key name separated by a dot, we have to know where the dot is.
1162         */
1163
1164        if (last_dot == NULL || last_dot == key) {
1165                error("key does not contain a section: %s", key);
1166                return -CONFIG_NO_SECTION_OR_NAME;
1167        }
1168
1169        if (!last_dot[1]) {
1170                error("key does not contain variable name: %s", key);
1171                return -CONFIG_NO_SECTION_OR_NAME;
1172        }
1173
1174        baselen = last_dot - key;
1175        if (baselen_)
1176                *baselen_ = baselen;
1177
1178        /*
1179         * Validate the key and while at it, lower case it for matching.
1180         */
1181        *store_key = xmalloc(strlen(key) + 1);
1182
1183        dot = 0;
1184        for (i = 0; key[i]; i++) {
1185                unsigned char c = key[i];
1186                if (c == '.')
1187                        dot = 1;
1188                /* Leave the extended basename untouched.. */
1189                if (!dot || i > baselen) {
1190                        if (!iskeychar(c) ||
1191                            (i == baselen + 1 && !isalpha(c))) {
1192                                error("invalid key: %s", key);
1193                                goto out_free_ret_1;
1194                        }
1195                        c = tolower(c);
1196                } else if (c == '\n') {
1197                        error("invalid key (newline): %s", key);
1198                        goto out_free_ret_1;
1199                }
1200                (*store_key)[i] = c;
1201        }
1202        (*store_key)[i] = 0;
1203
1204        return 0;
1205
1206out_free_ret_1:
1207        free(*store_key);
1208        return -CONFIG_INVALID_KEY;
1209}
1210
1211/*
1212 * If value==NULL, unset in (remove from) config,
1213 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1214 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1215 *     else all matching key/values (regardless how many) are removed,
1216 *     before the new pair is written.
1217 *
1218 * Returns 0 on success.
1219 *
1220 * This function does this:
1221 *
1222 * - it locks the config file by creating ".git/config.lock"
1223 *
1224 * - it then parses the config using store_aux() as validator to find
1225 *   the position on the key/value pair to replace. If it is to be unset,
1226 *   it must be found exactly once.
1227 *
1228 * - the config file is mmap()ed and the part before the match (if any) is
1229 *   written to the lock file, then the changed part and the rest.
1230 *
1231 * - the config file is removed and the lock file rename()d to it.
1232 *
1233 */
1234int git_config_set_multivar_in_file(const char *config_filename,
1235                                const char *key, const char *value,
1236                                const char *value_regex, int multi_replace)
1237{
1238        int fd = -1, in_fd;
1239        int ret;
1240        struct lock_file *lock = NULL;
1241
1242        /* parse-key returns negative; flip the sign to feed exit(3) */
1243        ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1244        if (ret)
1245                goto out_free;
1246
1247        store.multi_replace = multi_replace;
1248
1249
1250        /*
1251         * The lock serves a purpose in addition to locking: the new
1252         * contents of .git/config will be written into it.
1253         */
1254        lock = xcalloc(sizeof(struct lock_file), 1);
1255        fd = hold_lock_file_for_update(lock, config_filename, 0);
1256        if (fd < 0) {
1257                error("could not lock config file %s: %s", config_filename, strerror(errno));
1258                free(store.key);
1259                ret = CONFIG_NO_LOCK;
1260                goto out_free;
1261        }
1262
1263        /*
1264         * If .git/config does not exist yet, write a minimal version.
1265         */
1266        in_fd = open(config_filename, O_RDONLY);
1267        if ( in_fd < 0 ) {
1268                free(store.key);
1269
1270                if ( ENOENT != errno ) {
1271                        error("opening %s: %s", config_filename,
1272                              strerror(errno));
1273                        ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
1274                        goto out_free;
1275                }
1276                /* if nothing to unset, error out */
1277                if (value == NULL) {
1278                        ret = CONFIG_NOTHING_SET;
1279                        goto out_free;
1280                }
1281
1282                store.key = (char *)key;
1283                if (!store_write_section(fd, key) ||
1284                    !store_write_pair(fd, key, value))
1285                        goto write_err_out;
1286        } else {
1287                struct stat st;
1288                char *contents;
1289                size_t contents_sz, copy_begin, copy_end;
1290                int i, new_line = 0;
1291
1292                if (value_regex == NULL)
1293                        store.value_regex = NULL;
1294                else {
1295                        if (value_regex[0] == '!') {
1296                                store.do_not_match = 1;
1297                                value_regex++;
1298                        } else
1299                                store.do_not_match = 0;
1300
1301                        store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
1302                        if (regcomp(store.value_regex, value_regex,
1303                                        REG_EXTENDED)) {
1304                                error("invalid pattern: %s", value_regex);
1305                                free(store.value_regex);
1306                                ret = CONFIG_INVALID_PATTERN;
1307                                goto out_free;
1308                        }
1309                }
1310
1311                store.offset[0] = 0;
1312                store.state = START;
1313                store.seen = 0;
1314
1315                /*
1316                 * After this, store.offset will contain the *end* offset
1317                 * of the last match, or remain at 0 if no match was found.
1318                 * As a side effect, we make sure to transform only a valid
1319                 * existing config file.
1320                 */
1321                if (git_config_from_file(store_aux, config_filename, NULL)) {
1322                        error("invalid config file %s", config_filename);
1323                        free(store.key);
1324                        if (store.value_regex != NULL) {
1325                                regfree(store.value_regex);
1326                                free(store.value_regex);
1327                        }
1328                        ret = CONFIG_INVALID_FILE;
1329                        goto out_free;
1330                }
1331
1332                free(store.key);
1333                if (store.value_regex != NULL) {
1334                        regfree(store.value_regex);
1335                        free(store.value_regex);
1336                }
1337
1338                /* if nothing to unset, or too many matches, error out */
1339                if ((store.seen == 0 && value == NULL) ||
1340                                (store.seen > 1 && multi_replace == 0)) {
1341                        ret = CONFIG_NOTHING_SET;
1342                        goto out_free;
1343                }
1344
1345                fstat(in_fd, &st);
1346                contents_sz = xsize_t(st.st_size);
1347                contents = xmmap(NULL, contents_sz, PROT_READ,
1348                        MAP_PRIVATE, in_fd, 0);
1349                close(in_fd);
1350
1351                if (store.seen == 0)
1352                        store.seen = 1;
1353
1354                for (i = 0, copy_begin = 0; i < store.seen; i++) {
1355                        if (store.offset[i] == 0) {
1356                                store.offset[i] = copy_end = contents_sz;
1357                        } else if (store.state != KEY_SEEN) {
1358                                copy_end = store.offset[i];
1359                        } else
1360                                copy_end = find_beginning_of_line(
1361                                        contents, contents_sz,
1362                                        store.offset[i]-2, &new_line);
1363
1364                        if (copy_end > 0 && contents[copy_end-1] != '\n')
1365                                new_line = 1;
1366
1367                        /* write the first part of the config */
1368                        if (copy_end > copy_begin) {
1369                                if (write_in_full(fd, contents + copy_begin,
1370                                                  copy_end - copy_begin) <
1371                                    copy_end - copy_begin)
1372                                        goto write_err_out;
1373                                if (new_line &&
1374                                    write_str_in_full(fd, "\n") != 1)
1375                                        goto write_err_out;
1376                        }
1377                        copy_begin = store.offset[i];
1378                }
1379
1380                /* write the pair (value == NULL means unset) */
1381                if (value != NULL) {
1382                        if (store.state == START) {
1383                                if (!store_write_section(fd, key))
1384                                        goto write_err_out;
1385                        }
1386                        if (!store_write_pair(fd, key, value))
1387                                goto write_err_out;
1388                }
1389
1390                /* write the rest of the config */
1391                if (copy_begin < contents_sz)
1392                        if (write_in_full(fd, contents + copy_begin,
1393                                          contents_sz - copy_begin) <
1394                            contents_sz - copy_begin)
1395                                goto write_err_out;
1396
1397                munmap(contents, contents_sz);
1398        }
1399
1400        if (commit_lock_file(lock) < 0) {
1401                error("could not commit config file %s", config_filename);
1402                ret = CONFIG_NO_WRITE;
1403                goto out_free;
1404        }
1405
1406        /*
1407         * lock is committed, so don't try to roll it back below.
1408         * NOTE: Since lockfile.c keeps a linked list of all created
1409         * lock_file structures, it isn't safe to free(lock).  It's
1410         * better to just leave it hanging around.
1411         */
1412        lock = NULL;
1413        ret = 0;
1414
1415out_free:
1416        if (lock)
1417                rollback_lock_file(lock);
1418        return ret;
1419
1420write_err_out:
1421        ret = write_error(lock->filename);
1422        goto out_free;
1423
1424}
1425
1426int git_config_set_multivar(const char *key, const char *value,
1427                        const char *value_regex, int multi_replace)
1428{
1429        const char *config_filename;
1430        char *buf = NULL;
1431        int ret;
1432
1433        if (config_exclusive_filename)
1434                config_filename = config_exclusive_filename;
1435        else
1436                config_filename = buf = git_pathdup("config");
1437
1438        ret = git_config_set_multivar_in_file(config_filename, key, value,
1439                                        value_regex, multi_replace);
1440        free(buf);
1441        return ret;
1442}
1443
1444static int section_name_match (const char *buf, const char *name)
1445{
1446        int i = 0, j = 0, dot = 0;
1447        if (buf[i] != '[')
1448                return 0;
1449        for (i = 1; buf[i] && buf[i] != ']'; i++) {
1450                if (!dot && isspace(buf[i])) {
1451                        dot = 1;
1452                        if (name[j++] != '.')
1453                                break;
1454                        for (i++; isspace(buf[i]); i++)
1455                                ; /* do nothing */
1456                        if (buf[i] != '"')
1457                                break;
1458                        continue;
1459                }
1460                if (buf[i] == '\\' && dot)
1461                        i++;
1462                else if (buf[i] == '"' && dot) {
1463                        for (i++; isspace(buf[i]); i++)
1464                                ; /* do_nothing */
1465                        break;
1466                }
1467                if (buf[i] != name[j++])
1468                        break;
1469        }
1470        if (buf[i] == ']' && name[j] == 0) {
1471                /*
1472                 * We match, now just find the right length offset by
1473                 * gobbling up any whitespace after it, as well
1474                 */
1475                i++;
1476                for (; buf[i] && isspace(buf[i]); i++)
1477                        ; /* do nothing */
1478                return i;
1479        }
1480        return 0;
1481}
1482
1483/* if new_name == NULL, the section is removed instead */
1484int git_config_rename_section(const char *old_name, const char *new_name)
1485{
1486        int ret = 0, remove = 0;
1487        char *config_filename;
1488        struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1489        int out_fd;
1490        char buf[1024];
1491        FILE *config_file;
1492
1493        if (config_exclusive_filename)
1494                config_filename = xstrdup(config_exclusive_filename);
1495        else
1496                config_filename = git_pathdup("config");
1497        out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1498        if (out_fd < 0) {
1499                ret = error("could not lock config file %s", config_filename);
1500                goto out;
1501        }
1502
1503        if (!(config_file = fopen(config_filename, "rb"))) {
1504                /* no config file means nothing to rename, no error */
1505                goto unlock_and_out;
1506        }
1507
1508        while (fgets(buf, sizeof(buf), config_file)) {
1509                int i;
1510                int length;
1511                char *output = buf;
1512                for (i = 0; buf[i] && isspace(buf[i]); i++)
1513                        ; /* do nothing */
1514                if (buf[i] == '[') {
1515                        /* it's a section */
1516                        int offset = section_name_match(&buf[i], old_name);
1517                        if (offset > 0) {
1518                                ret++;
1519                                if (new_name == NULL) {
1520                                        remove = 1;
1521                                        continue;
1522                                }
1523                                store.baselen = strlen(new_name);
1524                                if (!store_write_section(out_fd, new_name)) {
1525                                        ret = write_error(lock->filename);
1526                                        goto out;
1527                                }
1528                                /*
1529                                 * We wrote out the new section, with
1530                                 * a newline, now skip the old
1531                                 * section's length
1532                                 */
1533                                output += offset + i;
1534                                if (strlen(output) > 0) {
1535                                        /*
1536                                         * More content means there's
1537                                         * a declaration to put on the
1538                                         * next line; indent with a
1539                                         * tab
1540                                         */
1541                                        output -= 1;
1542                                        output[0] = '\t';
1543                                }
1544                        }
1545                        remove = 0;
1546                }
1547                if (remove)
1548                        continue;
1549                length = strlen(output);
1550                if (write_in_full(out_fd, output, length) != length) {
1551                        ret = write_error(lock->filename);
1552                        goto out;
1553                }
1554        }
1555        fclose(config_file);
1556unlock_and_out:
1557        if (commit_lock_file(lock) < 0)
1558                ret = error("could not commit config file %s", config_filename);
1559out:
1560        free(config_filename);
1561        return ret;
1562}
1563
1564/*
1565 * Call this to report error for your variable that should not
1566 * get a boolean value (i.e. "[my] var" means "true").
1567 */
1568int config_error_nonbool(const char *var)
1569{
1570        return error("Missing value for '%s'", var);
1571}