config.con commit Merge branch 'tz/do-not-clean-spec-file' (0996727)
   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 "config.h"
  10#include "repository.h"
  11#include "lockfile.h"
  12#include "exec_cmd.h"
  13#include "strbuf.h"
  14#include "quote.h"
  15#include "hashmap.h"
  16#include "string-list.h"
  17#include "utf8.h"
  18#include "dir.h"
  19
  20struct config_source {
  21        struct config_source *prev;
  22        union {
  23                FILE *file;
  24                struct config_buf {
  25                        const char *buf;
  26                        size_t len;
  27                        size_t pos;
  28                } buf;
  29        } u;
  30        enum config_origin_type origin_type;
  31        const char *name;
  32        const char *path;
  33        int die_on_error;
  34        int linenr;
  35        int eof;
  36        struct strbuf value;
  37        struct strbuf var;
  38
  39        int (*do_fgetc)(struct config_source *c);
  40        int (*do_ungetc)(int c, struct config_source *conf);
  41        long (*do_ftell)(struct config_source *c);
  42};
  43
  44/*
  45 * These variables record the "current" config source, which
  46 * can be accessed by parsing callbacks.
  47 *
  48 * The "cf" variable will be non-NULL only when we are actually parsing a real
  49 * config source (file, blob, cmdline, etc).
  50 *
  51 * The "current_config_kvi" variable will be non-NULL only when we are feeding
  52 * cached config from a configset into a callback.
  53 *
  54 * They should generally never be non-NULL at the same time. If they are both
  55 * NULL, then we aren't parsing anything (and depending on the function looking
  56 * at the variables, it's either a bug for it to be called in the first place,
  57 * or it's a function which can be reused for non-config purposes, and should
  58 * fall back to some sane behavior).
  59 */
  60static struct config_source *cf;
  61static struct key_value_info *current_config_kvi;
  62
  63/*
  64 * Similar to the variables above, this gives access to the "scope" of the
  65 * current value (repo, global, etc). For cached values, it can be found via
  66 * the current_config_kvi as above. During parsing, the current value can be
  67 * found in this variable. It's not part of "cf" because it transcends a single
  68 * file (i.e., a file included from .git/config is still in "repo" scope).
  69 */
  70static enum config_scope current_parsing_scope;
  71
  72static int core_compression_seen;
  73static int pack_compression_seen;
  74static int zlib_compression_seen;
  75
  76static int config_file_fgetc(struct config_source *conf)
  77{
  78        return getc_unlocked(conf->u.file);
  79}
  80
  81static int config_file_ungetc(int c, struct config_source *conf)
  82{
  83        return ungetc(c, conf->u.file);
  84}
  85
  86static long config_file_ftell(struct config_source *conf)
  87{
  88        return ftell(conf->u.file);
  89}
  90
  91
  92static int config_buf_fgetc(struct config_source *conf)
  93{
  94        if (conf->u.buf.pos < conf->u.buf.len)
  95                return conf->u.buf.buf[conf->u.buf.pos++];
  96
  97        return EOF;
  98}
  99
 100static int config_buf_ungetc(int c, struct config_source *conf)
 101{
 102        if (conf->u.buf.pos > 0) {
 103                conf->u.buf.pos--;
 104                if (conf->u.buf.buf[conf->u.buf.pos] != c)
 105                        die("BUG: config_buf can only ungetc the same character");
 106                return c;
 107        }
 108
 109        return EOF;
 110}
 111
 112static long config_buf_ftell(struct config_source *conf)
 113{
 114        return conf->u.buf.pos;
 115}
 116
 117#define MAX_INCLUDE_DEPTH 10
 118static const char include_depth_advice[] =
 119"exceeded maximum include depth (%d) while including\n"
 120"       %s\n"
 121"from\n"
 122"       %s\n"
 123"Do you have circular includes?";
 124static int handle_path_include(const char *path, struct config_include_data *inc)
 125{
 126        int ret = 0;
 127        struct strbuf buf = STRBUF_INIT;
 128        char *expanded;
 129
 130        if (!path)
 131                return config_error_nonbool("include.path");
 132
 133        expanded = expand_user_path(path, 0);
 134        if (!expanded)
 135                return error("could not expand include path '%s'", path);
 136        path = expanded;
 137
 138        /*
 139         * Use an absolute path as-is, but interpret relative paths
 140         * based on the including config file.
 141         */
 142        if (!is_absolute_path(path)) {
 143                char *slash;
 144
 145                if (!cf || !cf->path)
 146                        return error("relative config includes must come from files");
 147
 148                slash = find_last_dir_sep(cf->path);
 149                if (slash)
 150                        strbuf_add(&buf, cf->path, slash - cf->path + 1);
 151                strbuf_addstr(&buf, path);
 152                path = buf.buf;
 153        }
 154
 155        if (!access_or_die(path, R_OK, 0)) {
 156                if (++inc->depth > MAX_INCLUDE_DEPTH)
 157                        die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
 158                            !cf ? "<unknown>" :
 159                            cf->name ? cf->name :
 160                            "the command line");
 161                ret = git_config_from_file(git_config_include, path, inc);
 162                inc->depth--;
 163        }
 164        strbuf_release(&buf);
 165        free(expanded);
 166        return ret;
 167}
 168
 169static int prepare_include_condition_pattern(struct strbuf *pat)
 170{
 171        struct strbuf path = STRBUF_INIT;
 172        char *expanded;
 173        int prefix = 0;
 174
 175        expanded = expand_user_path(pat->buf, 1);
 176        if (expanded) {
 177                strbuf_reset(pat);
 178                strbuf_addstr(pat, expanded);
 179                free(expanded);
 180        }
 181
 182        if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
 183                const char *slash;
 184
 185                if (!cf || !cf->path)
 186                        return error(_("relative config include "
 187                                       "conditionals must come from files"));
 188
 189                strbuf_realpath(&path, cf->path, 1);
 190                slash = find_last_dir_sep(path.buf);
 191                if (!slash)
 192                        die("BUG: how is this possible?");
 193                strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
 194                prefix = slash - path.buf + 1 /* slash */;
 195        } else if (!is_absolute_path(pat->buf))
 196                strbuf_insert(pat, 0, "**/", 3);
 197
 198        if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
 199                strbuf_addstr(pat, "**");
 200
 201        strbuf_release(&path);
 202        return prefix;
 203}
 204
 205static int include_by_gitdir(const struct config_options *opts,
 206                             const char *cond, size_t cond_len, int icase)
 207{
 208        struct strbuf text = STRBUF_INIT;
 209        struct strbuf pattern = STRBUF_INIT;
 210        int ret = 0, prefix;
 211        const char *git_dir;
 212        int already_tried_absolute = 0;
 213
 214        if (opts->git_dir)
 215                git_dir = opts->git_dir;
 216        else
 217                goto done;
 218
 219        strbuf_realpath(&text, git_dir, 1);
 220        strbuf_add(&pattern, cond, cond_len);
 221        prefix = prepare_include_condition_pattern(&pattern);
 222
 223again:
 224        if (prefix < 0)
 225                goto done;
 226
 227        if (prefix > 0) {
 228                /*
 229                 * perform literal matching on the prefix part so that
 230                 * any wildcard character in it can't create side effects.
 231                 */
 232                if (text.len < prefix)
 233                        goto done;
 234                if (!icase && strncmp(pattern.buf, text.buf, prefix))
 235                        goto done;
 236                if (icase && strncasecmp(pattern.buf, text.buf, prefix))
 237                        goto done;
 238        }
 239
 240        ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
 241                         icase ? WM_CASEFOLD : 0);
 242
 243        if (!ret && !already_tried_absolute) {
 244                /*
 245                 * We've tried e.g. matching gitdir:~/work, but if
 246                 * ~/work is a symlink to /mnt/storage/work
 247                 * strbuf_realpath() will expand it, so the rule won't
 248                 * match. Let's match against a
 249                 * strbuf_add_absolute_path() version of the path,
 250                 * which'll do the right thing
 251                 */
 252                strbuf_reset(&text);
 253                strbuf_add_absolute_path(&text, git_dir);
 254                already_tried_absolute = 1;
 255                goto again;
 256        }
 257done:
 258        strbuf_release(&pattern);
 259        strbuf_release(&text);
 260        return ret;
 261}
 262
 263static int include_condition_is_true(const struct config_options *opts,
 264                                     const char *cond, size_t cond_len)
 265{
 266
 267        if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
 268                return include_by_gitdir(opts, cond, cond_len, 0);
 269        else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
 270                return include_by_gitdir(opts, cond, cond_len, 1);
 271
 272        /* unknown conditionals are always false */
 273        return 0;
 274}
 275
 276int git_config_include(const char *var, const char *value, void *data)
 277{
 278        struct config_include_data *inc = data;
 279        const char *cond, *key;
 280        int cond_len;
 281        int ret;
 282
 283        /*
 284         * Pass along all values, including "include" directives; this makes it
 285         * possible to query information on the includes themselves.
 286         */
 287        ret = inc->fn(var, value, inc->data);
 288        if (ret < 0)
 289                return ret;
 290
 291        if (!strcmp(var, "include.path"))
 292                ret = handle_path_include(value, inc);
 293
 294        if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
 295            (cond && include_condition_is_true(inc->opts, cond, cond_len)) &&
 296            !strcmp(key, "path"))
 297                ret = handle_path_include(value, inc);
 298
 299        return ret;
 300}
 301
 302void git_config_push_parameter(const char *text)
 303{
 304        struct strbuf env = STRBUF_INIT;
 305        const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
 306        if (old && *old) {
 307                strbuf_addstr(&env, old);
 308                strbuf_addch(&env, ' ');
 309        }
 310        sq_quote_buf(&env, text);
 311        setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
 312        strbuf_release(&env);
 313}
 314
 315static inline int iskeychar(int c)
 316{
 317        return isalnum(c) || c == '-';
 318}
 319
 320/*
 321 * Auxiliary function to sanity-check and split the key into the section
 322 * identifier and variable name.
 323 *
 324 * Returns 0 on success, -1 when there is an invalid character in the key and
 325 * -2 if there is no section name in the key.
 326 *
 327 * store_key - pointer to char* which will hold a copy of the key with
 328 *             lowercase section and variable name
 329 * baselen - pointer to int which will hold the length of the
 330 *           section + subsection part, can be NULL
 331 */
 332static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
 333{
 334        int i, dot, baselen;
 335        const char *last_dot = strrchr(key, '.');
 336
 337        /*
 338         * Since "key" actually contains the section name and the real
 339         * key name separated by a dot, we have to know where the dot is.
 340         */
 341
 342        if (last_dot == NULL || last_dot == key) {
 343                if (!quiet)
 344                        error("key does not contain a section: %s", key);
 345                return -CONFIG_NO_SECTION_OR_NAME;
 346        }
 347
 348        if (!last_dot[1]) {
 349                if (!quiet)
 350                        error("key does not contain variable name: %s", key);
 351                return -CONFIG_NO_SECTION_OR_NAME;
 352        }
 353
 354        baselen = last_dot - key;
 355        if (baselen_)
 356                *baselen_ = baselen;
 357
 358        /*
 359         * Validate the key and while at it, lower case it for matching.
 360         */
 361        if (store_key)
 362                *store_key = xmallocz(strlen(key));
 363
 364        dot = 0;
 365        for (i = 0; key[i]; i++) {
 366                unsigned char c = key[i];
 367                if (c == '.')
 368                        dot = 1;
 369                /* Leave the extended basename untouched.. */
 370                if (!dot || i > baselen) {
 371                        if (!iskeychar(c) ||
 372                            (i == baselen + 1 && !isalpha(c))) {
 373                                if (!quiet)
 374                                        error("invalid key: %s", key);
 375                                goto out_free_ret_1;
 376                        }
 377                        c = tolower(c);
 378                } else if (c == '\n') {
 379                        if (!quiet)
 380                                error("invalid key (newline): %s", key);
 381                        goto out_free_ret_1;
 382                }
 383                if (store_key)
 384                        (*store_key)[i] = c;
 385        }
 386
 387        return 0;
 388
 389out_free_ret_1:
 390        if (store_key) {
 391                FREE_AND_NULL(*store_key);
 392        }
 393        return -CONFIG_INVALID_KEY;
 394}
 395
 396int git_config_parse_key(const char *key, char **store_key, int *baselen)
 397{
 398        return git_config_parse_key_1(key, store_key, baselen, 0);
 399}
 400
 401int git_config_key_is_valid(const char *key)
 402{
 403        return !git_config_parse_key_1(key, NULL, NULL, 1);
 404}
 405
 406int git_config_parse_parameter(const char *text,
 407                               config_fn_t fn, void *data)
 408{
 409        const char *value;
 410        char *canonical_name;
 411        struct strbuf **pair;
 412        int ret;
 413
 414        pair = strbuf_split_str(text, '=', 2);
 415        if (!pair[0])
 416                return error("bogus config parameter: %s", text);
 417
 418        if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
 419                strbuf_setlen(pair[0], pair[0]->len - 1);
 420                value = pair[1] ? pair[1]->buf : "";
 421        } else {
 422                value = NULL;
 423        }
 424
 425        strbuf_trim(pair[0]);
 426        if (!pair[0]->len) {
 427                strbuf_list_free(pair);
 428                return error("bogus config parameter: %s", text);
 429        }
 430
 431        if (git_config_parse_key(pair[0]->buf, &canonical_name, NULL)) {
 432                ret = -1;
 433        } else {
 434                ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
 435                free(canonical_name);
 436        }
 437        strbuf_list_free(pair);
 438        return ret;
 439}
 440
 441int git_config_from_parameters(config_fn_t fn, void *data)
 442{
 443        const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
 444        int ret = 0;
 445        char *envw;
 446        const char **argv = NULL;
 447        int nr = 0, alloc = 0;
 448        int i;
 449        struct config_source source;
 450
 451        if (!env)
 452                return 0;
 453
 454        memset(&source, 0, sizeof(source));
 455        source.prev = cf;
 456        source.origin_type = CONFIG_ORIGIN_CMDLINE;
 457        cf = &source;
 458
 459        /* sq_dequote will write over it */
 460        envw = xstrdup(env);
 461
 462        if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
 463                ret = error("bogus format in " CONFIG_DATA_ENVIRONMENT);
 464                goto out;
 465        }
 466
 467        for (i = 0; i < nr; i++) {
 468                if (git_config_parse_parameter(argv[i], fn, data) < 0) {
 469                        ret = -1;
 470                        goto out;
 471                }
 472        }
 473
 474out:
 475        free(argv);
 476        free(envw);
 477        cf = source.prev;
 478        return ret;
 479}
 480
 481static int get_next_char(void)
 482{
 483        int c = cf->do_fgetc(cf);
 484
 485        if (c == '\r') {
 486                /* DOS like systems */
 487                c = cf->do_fgetc(cf);
 488                if (c != '\n') {
 489                        if (c != EOF)
 490                                cf->do_ungetc(c, cf);
 491                        c = '\r';
 492                }
 493        }
 494        if (c == '\n')
 495                cf->linenr++;
 496        if (c == EOF) {
 497                cf->eof = 1;
 498                cf->linenr++;
 499                c = '\n';
 500        }
 501        return c;
 502}
 503
 504static char *parse_value(void)
 505{
 506        int quote = 0, comment = 0, space = 0;
 507
 508        strbuf_reset(&cf->value);
 509        for (;;) {
 510                int c = get_next_char();
 511                if (c == '\n') {
 512                        if (quote) {
 513                                cf->linenr--;
 514                                return NULL;
 515                        }
 516                        return cf->value.buf;
 517                }
 518                if (comment)
 519                        continue;
 520                if (isspace(c) && !quote) {
 521                        if (cf->value.len)
 522                                space++;
 523                        continue;
 524                }
 525                if (!quote) {
 526                        if (c == ';' || c == '#') {
 527                                comment = 1;
 528                                continue;
 529                        }
 530                }
 531                for (; space; space--)
 532                        strbuf_addch(&cf->value, ' ');
 533                if (c == '\\') {
 534                        c = get_next_char();
 535                        switch (c) {
 536                        case '\n':
 537                                continue;
 538                        case 't':
 539                                c = '\t';
 540                                break;
 541                        case 'b':
 542                                c = '\b';
 543                                break;
 544                        case 'n':
 545                                c = '\n';
 546                                break;
 547                        /* Some characters escape as themselves */
 548                        case '\\': case '"':
 549                                break;
 550                        /* Reject unknown escape sequences */
 551                        default:
 552                                return NULL;
 553                        }
 554                        strbuf_addch(&cf->value, c);
 555                        continue;
 556                }
 557                if (c == '"') {
 558                        quote = 1-quote;
 559                        continue;
 560                }
 561                strbuf_addch(&cf->value, c);
 562        }
 563}
 564
 565static int get_value(config_fn_t fn, void *data, struct strbuf *name)
 566{
 567        int c;
 568        char *value;
 569        int ret;
 570
 571        /* Get the full name */
 572        for (;;) {
 573                c = get_next_char();
 574                if (cf->eof)
 575                        break;
 576                if (!iskeychar(c))
 577                        break;
 578                strbuf_addch(name, tolower(c));
 579        }
 580
 581        while (c == ' ' || c == '\t')
 582                c = get_next_char();
 583
 584        value = NULL;
 585        if (c != '\n') {
 586                if (c != '=')
 587                        return -1;
 588                value = parse_value();
 589                if (!value)
 590                        return -1;
 591        }
 592        /*
 593         * We already consumed the \n, but we need linenr to point to
 594         * the line we just parsed during the call to fn to get
 595         * accurate line number in error messages.
 596         */
 597        cf->linenr--;
 598        ret = fn(name->buf, value, data);
 599        if (ret >= 0)
 600                cf->linenr++;
 601        return ret;
 602}
 603
 604static int get_extended_base_var(struct strbuf *name, int c)
 605{
 606        do {
 607                if (c == '\n')
 608                        goto error_incomplete_line;
 609                c = get_next_char();
 610        } while (isspace(c));
 611
 612        /* We require the format to be '[base "extension"]' */
 613        if (c != '"')
 614                return -1;
 615        strbuf_addch(name, '.');
 616
 617        for (;;) {
 618                int c = get_next_char();
 619                if (c == '\n')
 620                        goto error_incomplete_line;
 621                if (c == '"')
 622                        break;
 623                if (c == '\\') {
 624                        c = get_next_char();
 625                        if (c == '\n')
 626                                goto error_incomplete_line;
 627                }
 628                strbuf_addch(name, c);
 629        }
 630
 631        /* Final ']' */
 632        if (get_next_char() != ']')
 633                return -1;
 634        return 0;
 635error_incomplete_line:
 636        cf->linenr--;
 637        return -1;
 638}
 639
 640static int get_base_var(struct strbuf *name)
 641{
 642        for (;;) {
 643                int c = get_next_char();
 644                if (cf->eof)
 645                        return -1;
 646                if (c == ']')
 647                        return 0;
 648                if (isspace(c))
 649                        return get_extended_base_var(name, c);
 650                if (!iskeychar(c) && c != '.')
 651                        return -1;
 652                strbuf_addch(name, tolower(c));
 653        }
 654}
 655
 656static int git_parse_source(config_fn_t fn, void *data)
 657{
 658        int comment = 0;
 659        int baselen = 0;
 660        struct strbuf *var = &cf->var;
 661        int error_return = 0;
 662        char *error_msg = NULL;
 663
 664        /* U+FEFF Byte Order Mark in UTF8 */
 665        const char *bomptr = utf8_bom;
 666
 667        for (;;) {
 668                int c = get_next_char();
 669                if (bomptr && *bomptr) {
 670                        /* We are at the file beginning; skip UTF8-encoded BOM
 671                         * if present. Sane editors won't put this in on their
 672                         * own, but e.g. Windows Notepad will do it happily. */
 673                        if (c == (*bomptr & 0377)) {
 674                                bomptr++;
 675                                continue;
 676                        } else {
 677                                /* Do not tolerate partial BOM. */
 678                                if (bomptr != utf8_bom)
 679                                        break;
 680                                /* No BOM at file beginning. Cool. */
 681                                bomptr = NULL;
 682                        }
 683                }
 684                if (c == '\n') {
 685                        if (cf->eof)
 686                                return 0;
 687                        comment = 0;
 688                        continue;
 689                }
 690                if (comment || isspace(c))
 691                        continue;
 692                if (c == '#' || c == ';') {
 693                        comment = 1;
 694                        continue;
 695                }
 696                if (c == '[') {
 697                        /* Reset prior to determining a new stem */
 698                        strbuf_reset(var);
 699                        if (get_base_var(var) < 0 || var->len < 1)
 700                                break;
 701                        strbuf_addch(var, '.');
 702                        baselen = var->len;
 703                        continue;
 704                }
 705                if (!isalpha(c))
 706                        break;
 707                /*
 708                 * Truncate the var name back to the section header
 709                 * stem prior to grabbing the suffix part of the name
 710                 * and the value.
 711                 */
 712                strbuf_setlen(var, baselen);
 713                strbuf_addch(var, tolower(c));
 714                if (get_value(fn, data, var) < 0)
 715                        break;
 716        }
 717
 718        switch (cf->origin_type) {
 719        case CONFIG_ORIGIN_BLOB:
 720                error_msg = xstrfmt(_("bad config line %d in blob %s"),
 721                                      cf->linenr, cf->name);
 722                break;
 723        case CONFIG_ORIGIN_FILE:
 724                error_msg = xstrfmt(_("bad config line %d in file %s"),
 725                                      cf->linenr, cf->name);
 726                break;
 727        case CONFIG_ORIGIN_STDIN:
 728                error_msg = xstrfmt(_("bad config line %d in standard input"),
 729                                      cf->linenr);
 730                break;
 731        case CONFIG_ORIGIN_SUBMODULE_BLOB:
 732                error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
 733                                       cf->linenr, cf->name);
 734                break;
 735        case CONFIG_ORIGIN_CMDLINE:
 736                error_msg = xstrfmt(_("bad config line %d in command line %s"),
 737                                       cf->linenr, cf->name);
 738                break;
 739        default:
 740                error_msg = xstrfmt(_("bad config line %d in %s"),
 741                                      cf->linenr, cf->name);
 742        }
 743
 744        if (cf->die_on_error)
 745                die("%s", error_msg);
 746        else
 747                error_return = error("%s", error_msg);
 748
 749        free(error_msg);
 750        return error_return;
 751}
 752
 753static int parse_unit_factor(const char *end, uintmax_t *val)
 754{
 755        if (!*end)
 756                return 1;
 757        else if (!strcasecmp(end, "k")) {
 758                *val *= 1024;
 759                return 1;
 760        }
 761        else if (!strcasecmp(end, "m")) {
 762                *val *= 1024 * 1024;
 763                return 1;
 764        }
 765        else if (!strcasecmp(end, "g")) {
 766                *val *= 1024 * 1024 * 1024;
 767                return 1;
 768        }
 769        return 0;
 770}
 771
 772static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
 773{
 774        if (value && *value) {
 775                char *end;
 776                intmax_t val;
 777                uintmax_t uval;
 778                uintmax_t factor = 1;
 779
 780                errno = 0;
 781                val = strtoimax(value, &end, 0);
 782                if (errno == ERANGE)
 783                        return 0;
 784                if (!parse_unit_factor(end, &factor)) {
 785                        errno = EINVAL;
 786                        return 0;
 787                }
 788                uval = labs(val);
 789                uval *= factor;
 790                if (uval > max || labs(val) > uval) {
 791                        errno = ERANGE;
 792                        return 0;
 793                }
 794                val *= factor;
 795                *ret = val;
 796                return 1;
 797        }
 798        errno = EINVAL;
 799        return 0;
 800}
 801
 802static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
 803{
 804        if (value && *value) {
 805                char *end;
 806                uintmax_t val;
 807                uintmax_t oldval;
 808
 809                errno = 0;
 810                val = strtoumax(value, &end, 0);
 811                if (errno == ERANGE)
 812                        return 0;
 813                oldval = val;
 814                if (!parse_unit_factor(end, &val)) {
 815                        errno = EINVAL;
 816                        return 0;
 817                }
 818                if (val > max || oldval > val) {
 819                        errno = ERANGE;
 820                        return 0;
 821                }
 822                *ret = val;
 823                return 1;
 824        }
 825        errno = EINVAL;
 826        return 0;
 827}
 828
 829static int git_parse_int(const char *value, int *ret)
 830{
 831        intmax_t tmp;
 832        if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
 833                return 0;
 834        *ret = tmp;
 835        return 1;
 836}
 837
 838static int git_parse_int64(const char *value, int64_t *ret)
 839{
 840        intmax_t tmp;
 841        if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
 842                return 0;
 843        *ret = tmp;
 844        return 1;
 845}
 846
 847int git_parse_ulong(const char *value, unsigned long *ret)
 848{
 849        uintmax_t tmp;
 850        if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
 851                return 0;
 852        *ret = tmp;
 853        return 1;
 854}
 855
 856static int git_parse_ssize_t(const char *value, ssize_t *ret)
 857{
 858        intmax_t tmp;
 859        if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
 860                return 0;
 861        *ret = tmp;
 862        return 1;
 863}
 864
 865NORETURN
 866static void die_bad_number(const char *name, const char *value)
 867{
 868        const char * error_type = (errno == ERANGE)? _("out of range"):_("invalid unit");
 869
 870        if (!value)
 871                value = "";
 872
 873        if (!(cf && cf->name))
 874                die(_("bad numeric config value '%s' for '%s': %s"),
 875                    value, name, error_type);
 876
 877        switch (cf->origin_type) {
 878        case CONFIG_ORIGIN_BLOB:
 879                die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
 880                    value, name, cf->name, error_type);
 881        case CONFIG_ORIGIN_FILE:
 882                die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
 883                    value, name, cf->name, error_type);
 884        case CONFIG_ORIGIN_STDIN:
 885                die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
 886                    value, name, error_type);
 887        case CONFIG_ORIGIN_SUBMODULE_BLOB:
 888                die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
 889                    value, name, cf->name, error_type);
 890        case CONFIG_ORIGIN_CMDLINE:
 891                die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
 892                    value, name, cf->name, error_type);
 893        default:
 894                die(_("bad numeric config value '%s' for '%s' in %s: %s"),
 895                    value, name, cf->name, error_type);
 896        }
 897}
 898
 899int git_config_int(const char *name, const char *value)
 900{
 901        int ret;
 902        if (!git_parse_int(value, &ret))
 903                die_bad_number(name, value);
 904        return ret;
 905}
 906
 907int64_t git_config_int64(const char *name, const char *value)
 908{
 909        int64_t ret;
 910        if (!git_parse_int64(value, &ret))
 911                die_bad_number(name, value);
 912        return ret;
 913}
 914
 915unsigned long git_config_ulong(const char *name, const char *value)
 916{
 917        unsigned long ret;
 918        if (!git_parse_ulong(value, &ret))
 919                die_bad_number(name, value);
 920        return ret;
 921}
 922
 923ssize_t git_config_ssize_t(const char *name, const char *value)
 924{
 925        ssize_t ret;
 926        if (!git_parse_ssize_t(value, &ret))
 927                die_bad_number(name, value);
 928        return ret;
 929}
 930
 931static int git_parse_maybe_bool_text(const char *value)
 932{
 933        if (!value)
 934                return 1;
 935        if (!*value)
 936                return 0;
 937        if (!strcasecmp(value, "true")
 938            || !strcasecmp(value, "yes")
 939            || !strcasecmp(value, "on"))
 940                return 1;
 941        if (!strcasecmp(value, "false")
 942            || !strcasecmp(value, "no")
 943            || !strcasecmp(value, "off"))
 944                return 0;
 945        return -1;
 946}
 947
 948int git_parse_maybe_bool(const char *value)
 949{
 950        int v = git_parse_maybe_bool_text(value);
 951        if (0 <= v)
 952                return v;
 953        if (git_parse_int(value, &v))
 954                return !!v;
 955        return -1;
 956}
 957
 958int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
 959{
 960        int v = git_parse_maybe_bool_text(value);
 961        if (0 <= v) {
 962                *is_bool = 1;
 963                return v;
 964        }
 965        *is_bool = 0;
 966        return git_config_int(name, value);
 967}
 968
 969int git_config_bool(const char *name, const char *value)
 970{
 971        int discard;
 972        return !!git_config_bool_or_int(name, value, &discard);
 973}
 974
 975int git_config_string(const char **dest, const char *var, const char *value)
 976{
 977        if (!value)
 978                return config_error_nonbool(var);
 979        *dest = xstrdup(value);
 980        return 0;
 981}
 982
 983int git_config_pathname(const char **dest, const char *var, const char *value)
 984{
 985        if (!value)
 986                return config_error_nonbool(var);
 987        *dest = expand_user_path(value, 0);
 988        if (!*dest)
 989                die(_("failed to expand user dir in: '%s'"), value);
 990        return 0;
 991}
 992
 993int git_config_expiry_date(timestamp_t *timestamp, const char *var, const char *value)
 994{
 995        if (!value)
 996                return config_error_nonbool(var);
 997        if (parse_expiry_date(value, timestamp))
 998                return error(_("'%s' for '%s' is not a valid timestamp"),
 999                             value, var);
1000        return 0;
1001}
1002
1003static int git_default_core_config(const char *var, const char *value)
1004{
1005        /* This needs a better name */
1006        if (!strcmp(var, "core.filemode")) {
1007                trust_executable_bit = git_config_bool(var, value);
1008                return 0;
1009        }
1010        if (!strcmp(var, "core.trustctime")) {
1011                trust_ctime = git_config_bool(var, value);
1012                return 0;
1013        }
1014        if (!strcmp(var, "core.checkstat")) {
1015                if (!strcasecmp(value, "default"))
1016                        check_stat = 1;
1017                else if (!strcasecmp(value, "minimal"))
1018                        check_stat = 0;
1019        }
1020
1021        if (!strcmp(var, "core.quotepath")) {
1022                quote_path_fully = git_config_bool(var, value);
1023                return 0;
1024        }
1025
1026        if (!strcmp(var, "core.symlinks")) {
1027                has_symlinks = git_config_bool(var, value);
1028                return 0;
1029        }
1030
1031        if (!strcmp(var, "core.ignorecase")) {
1032                ignore_case = git_config_bool(var, value);
1033                return 0;
1034        }
1035
1036        if (!strcmp(var, "core.attributesfile"))
1037                return git_config_pathname(&git_attributes_file, var, value);
1038
1039        if (!strcmp(var, "core.hookspath"))
1040                return git_config_pathname(&git_hooks_path, var, value);
1041
1042        if (!strcmp(var, "core.bare")) {
1043                is_bare_repository_cfg = git_config_bool(var, value);
1044                return 0;
1045        }
1046
1047        if (!strcmp(var, "core.ignorestat")) {
1048                assume_unchanged = git_config_bool(var, value);
1049                return 0;
1050        }
1051
1052        if (!strcmp(var, "core.prefersymlinkrefs")) {
1053                prefer_symlink_refs = git_config_bool(var, value);
1054                return 0;
1055        }
1056
1057        if (!strcmp(var, "core.logallrefupdates")) {
1058                if (value && !strcasecmp(value, "always"))
1059                        log_all_ref_updates = LOG_REFS_ALWAYS;
1060                else if (git_config_bool(var, value))
1061                        log_all_ref_updates = LOG_REFS_NORMAL;
1062                else
1063                        log_all_ref_updates = LOG_REFS_NONE;
1064                return 0;
1065        }
1066
1067        if (!strcmp(var, "core.warnambiguousrefs")) {
1068                warn_ambiguous_refs = git_config_bool(var, value);
1069                return 0;
1070        }
1071
1072        if (!strcmp(var, "core.abbrev")) {
1073                if (!value)
1074                        return config_error_nonbool(var);
1075                if (!strcasecmp(value, "auto"))
1076                        default_abbrev = -1;
1077                else {
1078                        int abbrev = git_config_int(var, value);
1079                        if (abbrev < minimum_abbrev || abbrev > 40)
1080                                return error("abbrev length out of range: %d", abbrev);
1081                        default_abbrev = abbrev;
1082                }
1083                return 0;
1084        }
1085
1086        if (!strcmp(var, "core.disambiguate"))
1087                return set_disambiguate_hint_config(var, value);
1088
1089        if (!strcmp(var, "core.loosecompression")) {
1090                int level = git_config_int(var, value);
1091                if (level == -1)
1092                        level = Z_DEFAULT_COMPRESSION;
1093                else if (level < 0 || level > Z_BEST_COMPRESSION)
1094                        die(_("bad zlib compression level %d"), level);
1095                zlib_compression_level = level;
1096                zlib_compression_seen = 1;
1097                return 0;
1098        }
1099
1100        if (!strcmp(var, "core.compression")) {
1101                int level = git_config_int(var, value);
1102                if (level == -1)
1103                        level = Z_DEFAULT_COMPRESSION;
1104                else if (level < 0 || level > Z_BEST_COMPRESSION)
1105                        die(_("bad zlib compression level %d"), level);
1106                core_compression_level = level;
1107                core_compression_seen = 1;
1108                if (!zlib_compression_seen)
1109                        zlib_compression_level = level;
1110                if (!pack_compression_seen)
1111                        pack_compression_level = level;
1112                return 0;
1113        }
1114
1115        if (!strcmp(var, "core.packedgitwindowsize")) {
1116                int pgsz_x2 = getpagesize() * 2;
1117                packed_git_window_size = git_config_ulong(var, value);
1118
1119                /* This value must be multiple of (pagesize * 2) */
1120                packed_git_window_size /= pgsz_x2;
1121                if (packed_git_window_size < 1)
1122                        packed_git_window_size = 1;
1123                packed_git_window_size *= pgsz_x2;
1124                return 0;
1125        }
1126
1127        if (!strcmp(var, "core.bigfilethreshold")) {
1128                big_file_threshold = git_config_ulong(var, value);
1129                return 0;
1130        }
1131
1132        if (!strcmp(var, "core.packedgitlimit")) {
1133                packed_git_limit = git_config_ulong(var, value);
1134                return 0;
1135        }
1136
1137        if (!strcmp(var, "core.deltabasecachelimit")) {
1138                delta_base_cache_limit = git_config_ulong(var, value);
1139                return 0;
1140        }
1141
1142        if (!strcmp(var, "core.autocrlf")) {
1143                if (value && !strcasecmp(value, "input")) {
1144                        auto_crlf = AUTO_CRLF_INPUT;
1145                        return 0;
1146                }
1147                auto_crlf = git_config_bool(var, value);
1148                return 0;
1149        }
1150
1151        if (!strcmp(var, "core.safecrlf")) {
1152                int eol_rndtrp_die;
1153                if (value && !strcasecmp(value, "warn")) {
1154                        global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
1155                        return 0;
1156                }
1157                eol_rndtrp_die = git_config_bool(var, value);
1158                global_conv_flags_eol = eol_rndtrp_die ?
1159                        CONV_EOL_RNDTRP_DIE : CONV_EOL_RNDTRP_WARN;
1160                return 0;
1161        }
1162
1163        if (!strcmp(var, "core.eol")) {
1164                if (value && !strcasecmp(value, "lf"))
1165                        core_eol = EOL_LF;
1166                else if (value && !strcasecmp(value, "crlf"))
1167                        core_eol = EOL_CRLF;
1168                else if (value && !strcasecmp(value, "native"))
1169                        core_eol = EOL_NATIVE;
1170                else
1171                        core_eol = EOL_UNSET;
1172                return 0;
1173        }
1174
1175        if (!strcmp(var, "core.notesref")) {
1176                notes_ref_name = xstrdup(value);
1177                return 0;
1178        }
1179
1180        if (!strcmp(var, "core.editor"))
1181                return git_config_string(&editor_program, var, value);
1182
1183        if (!strcmp(var, "core.commentchar")) {
1184                if (!value)
1185                        return config_error_nonbool(var);
1186                else if (!strcasecmp(value, "auto"))
1187                        auto_comment_line_char = 1;
1188                else if (value[0] && !value[1]) {
1189                        comment_line_char = value[0];
1190                        auto_comment_line_char = 0;
1191                } else
1192                        return error("core.commentChar should only be one character");
1193                return 0;
1194        }
1195
1196        if (!strcmp(var, "core.askpass"))
1197                return git_config_string(&askpass_program, var, value);
1198
1199        if (!strcmp(var, "core.excludesfile"))
1200                return git_config_pathname(&excludes_file, var, value);
1201
1202        if (!strcmp(var, "core.whitespace")) {
1203                if (!value)
1204                        return config_error_nonbool(var);
1205                whitespace_rule_cfg = parse_whitespace_rule(value);
1206                return 0;
1207        }
1208
1209        if (!strcmp(var, "core.fsyncobjectfiles")) {
1210                fsync_object_files = git_config_bool(var, value);
1211                return 0;
1212        }
1213
1214        if (!strcmp(var, "core.preloadindex")) {
1215                core_preload_index = git_config_bool(var, value);
1216                return 0;
1217        }
1218
1219        if (!strcmp(var, "core.createobject")) {
1220                if (!strcmp(value, "rename"))
1221                        object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1222                else if (!strcmp(value, "link"))
1223                        object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1224                else
1225                        die(_("invalid mode for object creation: %s"), value);
1226                return 0;
1227        }
1228
1229        if (!strcmp(var, "core.sparsecheckout")) {
1230                core_apply_sparse_checkout = git_config_bool(var, value);
1231                return 0;
1232        }
1233
1234        if (!strcmp(var, "core.precomposeunicode")) {
1235                precomposed_unicode = git_config_bool(var, value);
1236                return 0;
1237        }
1238
1239        if (!strcmp(var, "core.protecthfs")) {
1240                protect_hfs = git_config_bool(var, value);
1241                return 0;
1242        }
1243
1244        if (!strcmp(var, "core.protectntfs")) {
1245                protect_ntfs = git_config_bool(var, value);
1246                return 0;
1247        }
1248
1249        if (!strcmp(var, "core.hidedotfiles")) {
1250                if (value && !strcasecmp(value, "dotgitonly"))
1251                        hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
1252                else
1253                        hide_dotfiles = git_config_bool(var, value);
1254                return 0;
1255        }
1256
1257        if (!strcmp(var, "core.partialclonefilter")) {
1258                return git_config_string(&core_partial_clone_filter_default,
1259                                         var, value);
1260        }
1261
1262        /* Add other config variables here and to Documentation/config.txt. */
1263        return 0;
1264}
1265
1266static int git_default_i18n_config(const char *var, const char *value)
1267{
1268        if (!strcmp(var, "i18n.commitencoding"))
1269                return git_config_string(&git_commit_encoding, var, value);
1270
1271        if (!strcmp(var, "i18n.logoutputencoding"))
1272                return git_config_string(&git_log_output_encoding, var, value);
1273
1274        /* Add other config variables here and to Documentation/config.txt. */
1275        return 0;
1276}
1277
1278static int git_default_branch_config(const char *var, const char *value)
1279{
1280        if (!strcmp(var, "branch.autosetupmerge")) {
1281                if (value && !strcasecmp(value, "always")) {
1282                        git_branch_track = BRANCH_TRACK_ALWAYS;
1283                        return 0;
1284                }
1285                git_branch_track = git_config_bool(var, value);
1286                return 0;
1287        }
1288        if (!strcmp(var, "branch.autosetuprebase")) {
1289                if (!value)
1290                        return config_error_nonbool(var);
1291                else if (!strcmp(value, "never"))
1292                        autorebase = AUTOREBASE_NEVER;
1293                else if (!strcmp(value, "local"))
1294                        autorebase = AUTOREBASE_LOCAL;
1295                else if (!strcmp(value, "remote"))
1296                        autorebase = AUTOREBASE_REMOTE;
1297                else if (!strcmp(value, "always"))
1298                        autorebase = AUTOREBASE_ALWAYS;
1299                else
1300                        return error("malformed value for %s", var);
1301                return 0;
1302        }
1303
1304        /* Add other config variables here and to Documentation/config.txt. */
1305        return 0;
1306}
1307
1308static int git_default_push_config(const char *var, const char *value)
1309{
1310        if (!strcmp(var, "push.default")) {
1311                if (!value)
1312                        return config_error_nonbool(var);
1313                else if (!strcmp(value, "nothing"))
1314                        push_default = PUSH_DEFAULT_NOTHING;
1315                else if (!strcmp(value, "matching"))
1316                        push_default = PUSH_DEFAULT_MATCHING;
1317                else if (!strcmp(value, "simple"))
1318                        push_default = PUSH_DEFAULT_SIMPLE;
1319                else if (!strcmp(value, "upstream"))
1320                        push_default = PUSH_DEFAULT_UPSTREAM;
1321                else if (!strcmp(value, "tracking")) /* deprecated */
1322                        push_default = PUSH_DEFAULT_UPSTREAM;
1323                else if (!strcmp(value, "current"))
1324                        push_default = PUSH_DEFAULT_CURRENT;
1325                else {
1326                        error("malformed value for %s: %s", var, value);
1327                        return error("Must be one of nothing, matching, simple, "
1328                                     "upstream or current.");
1329                }
1330                return 0;
1331        }
1332
1333        /* Add other config variables here and to Documentation/config.txt. */
1334        return 0;
1335}
1336
1337static int git_default_mailmap_config(const char *var, const char *value)
1338{
1339        if (!strcmp(var, "mailmap.file"))
1340                return git_config_pathname(&git_mailmap_file, var, value);
1341        if (!strcmp(var, "mailmap.blob"))
1342                return git_config_string(&git_mailmap_blob, var, value);
1343
1344        /* Add other config variables here and to Documentation/config.txt. */
1345        return 0;
1346}
1347
1348int git_default_config(const char *var, const char *value, void *dummy)
1349{
1350        if (starts_with(var, "core."))
1351                return git_default_core_config(var, value);
1352
1353        if (starts_with(var, "user."))
1354                return git_ident_config(var, value, dummy);
1355
1356        if (starts_with(var, "i18n."))
1357                return git_default_i18n_config(var, value);
1358
1359        if (starts_with(var, "branch."))
1360                return git_default_branch_config(var, value);
1361
1362        if (starts_with(var, "push."))
1363                return git_default_push_config(var, value);
1364
1365        if (starts_with(var, "mailmap."))
1366                return git_default_mailmap_config(var, value);
1367
1368        if (starts_with(var, "advice."))
1369                return git_default_advice_config(var, value);
1370
1371        if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1372                pager_use_color = git_config_bool(var,value);
1373                return 0;
1374        }
1375
1376        if (!strcmp(var, "pack.packsizelimit")) {
1377                pack_size_limit_cfg = git_config_ulong(var, value);
1378                return 0;
1379        }
1380
1381        if (!strcmp(var, "pack.compression")) {
1382                int level = git_config_int(var, value);
1383                if (level == -1)
1384                        level = Z_DEFAULT_COMPRESSION;
1385                else if (level < 0 || level > Z_BEST_COMPRESSION)
1386                        die(_("bad pack compression level %d"), level);
1387                pack_compression_level = level;
1388                pack_compression_seen = 1;
1389                return 0;
1390        }
1391
1392        /* Add other config variables here and to Documentation/config.txt. */
1393        return 0;
1394}
1395
1396/*
1397 * All source specific fields in the union, die_on_error, name and the callbacks
1398 * fgetc, ungetc, ftell of top need to be initialized before calling
1399 * this function.
1400 */
1401static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1402{
1403        int ret;
1404
1405        /* push config-file parsing state stack */
1406        top->prev = cf;
1407        top->linenr = 1;
1408        top->eof = 0;
1409        strbuf_init(&top->value, 1024);
1410        strbuf_init(&top->var, 1024);
1411        cf = top;
1412
1413        ret = git_parse_source(fn, data);
1414
1415        /* pop config-file parsing state stack */
1416        strbuf_release(&top->value);
1417        strbuf_release(&top->var);
1418        cf = top->prev;
1419
1420        return ret;
1421}
1422
1423static int do_config_from_file(config_fn_t fn,
1424                const enum config_origin_type origin_type,
1425                const char *name, const char *path, FILE *f,
1426                void *data)
1427{
1428        struct config_source top;
1429
1430        top.u.file = f;
1431        top.origin_type = origin_type;
1432        top.name = name;
1433        top.path = path;
1434        top.die_on_error = 1;
1435        top.do_fgetc = config_file_fgetc;
1436        top.do_ungetc = config_file_ungetc;
1437        top.do_ftell = config_file_ftell;
1438
1439        return do_config_from(&top, fn, data);
1440}
1441
1442static int git_config_from_stdin(config_fn_t fn, void *data)
1443{
1444        return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin, data);
1445}
1446
1447int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1448{
1449        int ret = -1;
1450        FILE *f;
1451
1452        f = fopen_or_warn(filename, "r");
1453        if (f) {
1454                flockfile(f);
1455                ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename, filename, f, data);
1456                funlockfile(f);
1457                fclose(f);
1458        }
1459        return ret;
1460}
1461
1462int git_config_from_mem(config_fn_t fn, const enum config_origin_type origin_type,
1463                        const char *name, const char *buf, size_t len, void *data)
1464{
1465        struct config_source top;
1466
1467        top.u.buf.buf = buf;
1468        top.u.buf.len = len;
1469        top.u.buf.pos = 0;
1470        top.origin_type = origin_type;
1471        top.name = name;
1472        top.path = NULL;
1473        top.die_on_error = 0;
1474        top.do_fgetc = config_buf_fgetc;
1475        top.do_ungetc = config_buf_ungetc;
1476        top.do_ftell = config_buf_ftell;
1477
1478        return do_config_from(&top, fn, data);
1479}
1480
1481int git_config_from_blob_oid(config_fn_t fn,
1482                              const char *name,
1483                              const struct object_id *oid,
1484                              void *data)
1485{
1486        enum object_type type;
1487        char *buf;
1488        unsigned long size;
1489        int ret;
1490
1491        buf = read_sha1_file(oid->hash, &type, &size);
1492        if (!buf)
1493                return error("unable to load config blob object '%s'", name);
1494        if (type != OBJ_BLOB) {
1495                free(buf);
1496                return error("reference '%s' does not point to a blob", name);
1497        }
1498
1499        ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size, data);
1500        free(buf);
1501
1502        return ret;
1503}
1504
1505static int git_config_from_blob_ref(config_fn_t fn,
1506                                    const char *name,
1507                                    void *data)
1508{
1509        struct object_id oid;
1510
1511        if (get_oid(name, &oid) < 0)
1512                return error("unable to resolve config blob '%s'", name);
1513        return git_config_from_blob_oid(fn, name, &oid, data);
1514}
1515
1516const char *git_etc_gitconfig(void)
1517{
1518        static const char *system_wide;
1519        if (!system_wide)
1520                system_wide = system_path(ETC_GITCONFIG);
1521        return system_wide;
1522}
1523
1524/*
1525 * Parse environment variable 'k' as a boolean (in various
1526 * possible spellings); if missing, use the default value 'def'.
1527 */
1528int git_env_bool(const char *k, int def)
1529{
1530        const char *v = getenv(k);
1531        return v ? git_config_bool(k, v) : def;
1532}
1533
1534/*
1535 * Parse environment variable 'k' as ulong with possibly a unit
1536 * suffix; if missing, use the default value 'val'.
1537 */
1538unsigned long git_env_ulong(const char *k, unsigned long val)
1539{
1540        const char *v = getenv(k);
1541        if (v && !git_parse_ulong(v, &val))
1542                die("failed to parse %s", k);
1543        return val;
1544}
1545
1546int git_config_system(void)
1547{
1548        return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1549}
1550
1551static int do_git_config_sequence(const struct config_options *opts,
1552                                  config_fn_t fn, void *data)
1553{
1554        int ret = 0;
1555        char *xdg_config = xdg_config_home("config");
1556        char *user_config = expand_user_path("~/.gitconfig", 0);
1557        char *repo_config;
1558
1559        if (opts->commondir)
1560                repo_config = mkpathdup("%s/config", opts->commondir);
1561        else
1562                repo_config = NULL;
1563
1564        current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1565        if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0))
1566                ret += git_config_from_file(fn, git_etc_gitconfig(),
1567                                            data);
1568
1569        current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1570        if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1571                ret += git_config_from_file(fn, xdg_config, data);
1572
1573        if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1574                ret += git_config_from_file(fn, user_config, data);
1575
1576        current_parsing_scope = CONFIG_SCOPE_REPO;
1577        if (repo_config && !access_or_die(repo_config, R_OK, 0))
1578                ret += git_config_from_file(fn, repo_config, data);
1579
1580        current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1581        if (git_config_from_parameters(fn, data) < 0)
1582                die(_("unable to parse command-line config"));
1583
1584        current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1585        free(xdg_config);
1586        free(user_config);
1587        free(repo_config);
1588        return ret;
1589}
1590
1591int config_with_options(config_fn_t fn, void *data,
1592                        struct git_config_source *config_source,
1593                        const struct config_options *opts)
1594{
1595        struct config_include_data inc = CONFIG_INCLUDE_INIT;
1596
1597        if (opts->respect_includes) {
1598                inc.fn = fn;
1599                inc.data = data;
1600                inc.opts = opts;
1601                fn = git_config_include;
1602                data = &inc;
1603        }
1604
1605        /*
1606         * If we have a specific filename, use it. Otherwise, follow the
1607         * regular lookup sequence.
1608         */
1609        if (config_source && config_source->use_stdin)
1610                return git_config_from_stdin(fn, data);
1611        else if (config_source && config_source->file)
1612                return git_config_from_file(fn, config_source->file, data);
1613        else if (config_source && config_source->blob)
1614                return git_config_from_blob_ref(fn, config_source->blob, data);
1615
1616        return do_git_config_sequence(opts, fn, data);
1617}
1618
1619static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1620{
1621        int i, value_index;
1622        struct string_list *values;
1623        struct config_set_element *entry;
1624        struct configset_list *list = &cs->list;
1625
1626        for (i = 0; i < list->nr; i++) {
1627                entry = list->items[i].e;
1628                value_index = list->items[i].value_index;
1629                values = &entry->value_list;
1630
1631                current_config_kvi = values->items[value_index].util;
1632
1633                if (fn(entry->key, values->items[value_index].string, data) < 0)
1634                        git_die_config_linenr(entry->key,
1635                                              current_config_kvi->filename,
1636                                              current_config_kvi->linenr);
1637
1638                current_config_kvi = NULL;
1639        }
1640}
1641
1642void read_early_config(config_fn_t cb, void *data)
1643{
1644        struct config_options opts = {0};
1645        struct strbuf commondir = STRBUF_INIT;
1646        struct strbuf gitdir = STRBUF_INIT;
1647
1648        opts.respect_includes = 1;
1649
1650        if (have_git_dir()) {
1651                opts.commondir = get_git_common_dir();
1652                opts.git_dir = get_git_dir();
1653        /*
1654         * When setup_git_directory() was not yet asked to discover the
1655         * GIT_DIR, we ask discover_git_directory() to figure out whether there
1656         * is any repository config we should use (but unlike
1657         * setup_git_directory_gently(), no global state is changed, most
1658         * notably, the current working directory is still the same after the
1659         * call).
1660         */
1661        } else if (!discover_git_directory(&commondir, &gitdir)) {
1662                opts.commondir = commondir.buf;
1663                opts.git_dir = gitdir.buf;
1664        }
1665
1666        config_with_options(cb, data, NULL, &opts);
1667
1668        strbuf_release(&commondir);
1669        strbuf_release(&gitdir);
1670}
1671
1672static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1673{
1674        struct config_set_element k;
1675        struct config_set_element *found_entry;
1676        char *normalized_key;
1677        /*
1678         * `key` may come from the user, so normalize it before using it
1679         * for querying entries from the hashmap.
1680         */
1681        if (git_config_parse_key(key, &normalized_key, NULL))
1682                return NULL;
1683
1684        hashmap_entry_init(&k, strhash(normalized_key));
1685        k.key = normalized_key;
1686        found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1687        free(normalized_key);
1688        return found_entry;
1689}
1690
1691static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1692{
1693        struct config_set_element *e;
1694        struct string_list_item *si;
1695        struct configset_list_item *l_item;
1696        struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1697
1698        e = configset_find_element(cs, key);
1699        /*
1700         * Since the keys are being fed by git_config*() callback mechanism, they
1701         * are already normalized. So simply add them without any further munging.
1702         */
1703        if (!e) {
1704                e = xmalloc(sizeof(*e));
1705                hashmap_entry_init(e, strhash(key));
1706                e->key = xstrdup(key);
1707                string_list_init(&e->value_list, 1);
1708                hashmap_add(&cs->config_hash, e);
1709        }
1710        si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1711
1712        ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1713        l_item = &cs->list.items[cs->list.nr++];
1714        l_item->e = e;
1715        l_item->value_index = e->value_list.nr - 1;
1716
1717        if (!cf)
1718                die("BUG: configset_add_value has no source");
1719        if (cf->name) {
1720                kv_info->filename = strintern(cf->name);
1721                kv_info->linenr = cf->linenr;
1722                kv_info->origin_type = cf->origin_type;
1723        } else {
1724                /* for values read from `git_config_from_parameters()` */
1725                kv_info->filename = NULL;
1726                kv_info->linenr = -1;
1727                kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1728        }
1729        kv_info->scope = current_parsing_scope;
1730        si->util = kv_info;
1731
1732        return 0;
1733}
1734
1735static int config_set_element_cmp(const void *unused_cmp_data,
1736                                  const void *entry,
1737                                  const void *entry_or_key,
1738                                  const void *unused_keydata)
1739{
1740        const struct config_set_element *e1 = entry;
1741        const struct config_set_element *e2 = entry_or_key;
1742
1743        return strcmp(e1->key, e2->key);
1744}
1745
1746void git_configset_init(struct config_set *cs)
1747{
1748        hashmap_init(&cs->config_hash, config_set_element_cmp, NULL, 0);
1749        cs->hash_initialized = 1;
1750        cs->list.nr = 0;
1751        cs->list.alloc = 0;
1752        cs->list.items = NULL;
1753}
1754
1755void git_configset_clear(struct config_set *cs)
1756{
1757        struct config_set_element *entry;
1758        struct hashmap_iter iter;
1759        if (!cs->hash_initialized)
1760                return;
1761
1762        hashmap_iter_init(&cs->config_hash, &iter);
1763        while ((entry = hashmap_iter_next(&iter))) {
1764                free(entry->key);
1765                string_list_clear(&entry->value_list, 1);
1766        }
1767        hashmap_free(&cs->config_hash, 1);
1768        cs->hash_initialized = 0;
1769        free(cs->list.items);
1770        cs->list.nr = 0;
1771        cs->list.alloc = 0;
1772        cs->list.items = NULL;
1773}
1774
1775static int config_set_callback(const char *key, const char *value, void *cb)
1776{
1777        struct config_set *cs = cb;
1778        configset_add_value(cs, key, value);
1779        return 0;
1780}
1781
1782int git_configset_add_file(struct config_set *cs, const char *filename)
1783{
1784        return git_config_from_file(config_set_callback, filename, cs);
1785}
1786
1787int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1788{
1789        const struct string_list *values = NULL;
1790        /*
1791         * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1792         * queried key in the files of the configset, the value returned will be the last
1793         * value in the value list for that key.
1794         */
1795        values = git_configset_get_value_multi(cs, key);
1796
1797        if (!values)
1798                return 1;
1799        assert(values->nr > 0);
1800        *value = values->items[values->nr - 1].string;
1801        return 0;
1802}
1803
1804const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1805{
1806        struct config_set_element *e = configset_find_element(cs, key);
1807        return e ? &e->value_list : NULL;
1808}
1809
1810int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1811{
1812        const char *value;
1813        if (!git_configset_get_value(cs, key, &value))
1814                return git_config_string(dest, key, value);
1815        else
1816                return 1;
1817}
1818
1819int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1820{
1821        return git_configset_get_string_const(cs, key, (const char **)dest);
1822}
1823
1824int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1825{
1826        const char *value;
1827        if (!git_configset_get_value(cs, key, &value)) {
1828                *dest = git_config_int(key, value);
1829                return 0;
1830        } else
1831                return 1;
1832}
1833
1834int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1835{
1836        const char *value;
1837        if (!git_configset_get_value(cs, key, &value)) {
1838                *dest = git_config_ulong(key, value);
1839                return 0;
1840        } else
1841                return 1;
1842}
1843
1844int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1845{
1846        const char *value;
1847        if (!git_configset_get_value(cs, key, &value)) {
1848                *dest = git_config_bool(key, value);
1849                return 0;
1850        } else
1851                return 1;
1852}
1853
1854int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1855                                int *is_bool, int *dest)
1856{
1857        const char *value;
1858        if (!git_configset_get_value(cs, key, &value)) {
1859                *dest = git_config_bool_or_int(key, value, is_bool);
1860                return 0;
1861        } else
1862                return 1;
1863}
1864
1865int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1866{
1867        const char *value;
1868        if (!git_configset_get_value(cs, key, &value)) {
1869                *dest = git_parse_maybe_bool(value);
1870                if (*dest == -1)
1871                        return -1;
1872                return 0;
1873        } else
1874                return 1;
1875}
1876
1877int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1878{
1879        const char *value;
1880        if (!git_configset_get_value(cs, key, &value))
1881                return git_config_pathname(dest, key, value);
1882        else
1883                return 1;
1884}
1885
1886/* Functions use to read configuration from a repository */
1887static void repo_read_config(struct repository *repo)
1888{
1889        struct config_options opts;
1890
1891        opts.respect_includes = 1;
1892        opts.commondir = repo->commondir;
1893        opts.git_dir = repo->gitdir;
1894
1895        if (!repo->config)
1896                repo->config = xcalloc(1, sizeof(struct config_set));
1897        else
1898                git_configset_clear(repo->config);
1899
1900        git_configset_init(repo->config);
1901
1902        if (config_with_options(config_set_callback, repo->config, NULL, &opts) < 0)
1903                /*
1904                 * config_with_options() normally returns only
1905                 * zero, as most errors are fatal, and
1906                 * non-fatal potential errors are guarded by "if"
1907                 * statements that are entered only when no error is
1908                 * possible.
1909                 *
1910                 * If we ever encounter a non-fatal error, it means
1911                 * something went really wrong and we should stop
1912                 * immediately.
1913                 */
1914                die(_("unknown error occurred while reading the configuration files"));
1915}
1916
1917static void git_config_check_init(struct repository *repo)
1918{
1919        if (repo->config && repo->config->hash_initialized)
1920                return;
1921        repo_read_config(repo);
1922}
1923
1924static void repo_config_clear(struct repository *repo)
1925{
1926        if (!repo->config || !repo->config->hash_initialized)
1927                return;
1928        git_configset_clear(repo->config);
1929}
1930
1931void repo_config(struct repository *repo, config_fn_t fn, void *data)
1932{
1933        git_config_check_init(repo);
1934        configset_iter(repo->config, fn, data);
1935}
1936
1937int repo_config_get_value(struct repository *repo,
1938                          const char *key, const char **value)
1939{
1940        git_config_check_init(repo);
1941        return git_configset_get_value(repo->config, key, value);
1942}
1943
1944const struct string_list *repo_config_get_value_multi(struct repository *repo,
1945                                                      const char *key)
1946{
1947        git_config_check_init(repo);
1948        return git_configset_get_value_multi(repo->config, key);
1949}
1950
1951int repo_config_get_string_const(struct repository *repo,
1952                                 const char *key, const char **dest)
1953{
1954        int ret;
1955        git_config_check_init(repo);
1956        ret = git_configset_get_string_const(repo->config, key, dest);
1957        if (ret < 0)
1958                git_die_config(key, NULL);
1959        return ret;
1960}
1961
1962int repo_config_get_string(struct repository *repo,
1963                           const char *key, char **dest)
1964{
1965        git_config_check_init(repo);
1966        return repo_config_get_string_const(repo, key, (const char **)dest);
1967}
1968
1969int repo_config_get_int(struct repository *repo,
1970                        const char *key, int *dest)
1971{
1972        git_config_check_init(repo);
1973        return git_configset_get_int(repo->config, key, dest);
1974}
1975
1976int repo_config_get_ulong(struct repository *repo,
1977                          const char *key, unsigned long *dest)
1978{
1979        git_config_check_init(repo);
1980        return git_configset_get_ulong(repo->config, key, dest);
1981}
1982
1983int repo_config_get_bool(struct repository *repo,
1984                         const char *key, int *dest)
1985{
1986        git_config_check_init(repo);
1987        return git_configset_get_bool(repo->config, key, dest);
1988}
1989
1990int repo_config_get_bool_or_int(struct repository *repo,
1991                                const char *key, int *is_bool, int *dest)
1992{
1993        git_config_check_init(repo);
1994        return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
1995}
1996
1997int repo_config_get_maybe_bool(struct repository *repo,
1998                               const char *key, int *dest)
1999{
2000        git_config_check_init(repo);
2001        return git_configset_get_maybe_bool(repo->config, key, dest);
2002}
2003
2004int repo_config_get_pathname(struct repository *repo,
2005                             const char *key, const char **dest)
2006{
2007        int ret;
2008        git_config_check_init(repo);
2009        ret = git_configset_get_pathname(repo->config, key, dest);
2010        if (ret < 0)
2011                git_die_config(key, NULL);
2012        return ret;
2013}
2014
2015/* Functions used historically to read configuration from 'the_repository' */
2016void git_config(config_fn_t fn, void *data)
2017{
2018        repo_config(the_repository, fn, data);
2019}
2020
2021void git_config_clear(void)
2022{
2023        repo_config_clear(the_repository);
2024}
2025
2026int git_config_get_value(const char *key, const char **value)
2027{
2028        return repo_config_get_value(the_repository, key, value);
2029}
2030
2031const struct string_list *git_config_get_value_multi(const char *key)
2032{
2033        return repo_config_get_value_multi(the_repository, key);
2034}
2035
2036int git_config_get_string_const(const char *key, const char **dest)
2037{
2038        return repo_config_get_string_const(the_repository, key, dest);
2039}
2040
2041int git_config_get_string(const char *key, char **dest)
2042{
2043        return repo_config_get_string(the_repository, key, dest);
2044}
2045
2046int git_config_get_int(const char *key, int *dest)
2047{
2048        return repo_config_get_int(the_repository, key, dest);
2049}
2050
2051int git_config_get_ulong(const char *key, unsigned long *dest)
2052{
2053        return repo_config_get_ulong(the_repository, key, dest);
2054}
2055
2056int git_config_get_bool(const char *key, int *dest)
2057{
2058        return repo_config_get_bool(the_repository, key, dest);
2059}
2060
2061int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2062{
2063        return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2064}
2065
2066int git_config_get_maybe_bool(const char *key, int *dest)
2067{
2068        return repo_config_get_maybe_bool(the_repository, key, dest);
2069}
2070
2071int git_config_get_pathname(const char *key, const char **dest)
2072{
2073        return repo_config_get_pathname(the_repository, key, dest);
2074}
2075
2076/*
2077 * Note: This function exists solely to maintain backward compatibility with
2078 * 'fetch' and 'update_clone' storing configuration in '.gitmodules' and should
2079 * NOT be used anywhere else.
2080 *
2081 * Runs the provided config function on the '.gitmodules' file found in the
2082 * working directory.
2083 */
2084void config_from_gitmodules(config_fn_t fn, void *data)
2085{
2086        if (the_repository->worktree) {
2087                char *file = repo_worktree_path(the_repository, GITMODULES_FILE);
2088                git_config_from_file(fn, file, data);
2089                free(file);
2090        }
2091}
2092
2093int git_config_get_expiry(const char *key, const char **output)
2094{
2095        int ret = git_config_get_string_const(key, output);
2096        if (ret)
2097                return ret;
2098        if (strcmp(*output, "now")) {
2099                timestamp_t now = approxidate("now");
2100                if (approxidate(*output) >= now)
2101                        git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2102        }
2103        return ret;
2104}
2105
2106int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now)
2107{
2108        char *expiry_string;
2109        intmax_t days;
2110        timestamp_t when;
2111
2112        if (git_config_get_string(key, &expiry_string))
2113                return 1; /* no such thing */
2114
2115        if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
2116                const int scale = 86400;
2117                *expiry = now - days * scale;
2118                return 0;
2119        }
2120
2121        if (!parse_expiry_date(expiry_string, &when)) {
2122                *expiry = when;
2123                return 0;
2124        }
2125        return -1; /* thing exists but cannot be parsed */
2126}
2127
2128int git_config_get_untracked_cache(void)
2129{
2130        int val = -1;
2131        const char *v;
2132
2133        /* Hack for test programs like test-dump-untracked-cache */
2134        if (ignore_untracked_cache_config)
2135                return -1;
2136
2137        if (!git_config_get_maybe_bool("core.untrackedcache", &val))
2138                return val;
2139
2140        if (!git_config_get_value("core.untrackedcache", &v)) {
2141                if (!strcasecmp(v, "keep"))
2142                        return -1;
2143
2144                error(_("unknown core.untrackedCache value '%s'; "
2145                        "using 'keep' default value"), v);
2146                return -1;
2147        }
2148
2149        return -1; /* default value */
2150}
2151
2152int git_config_get_split_index(void)
2153{
2154        int val;
2155
2156        if (!git_config_get_maybe_bool("core.splitindex", &val))
2157                return val;
2158
2159        return -1; /* default value */
2160}
2161
2162int git_config_get_max_percent_split_change(void)
2163{
2164        int val = -1;
2165
2166        if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2167                if (0 <= val && val <= 100)
2168                        return val;
2169
2170                return error(_("splitIndex.maxPercentChange value '%d' "
2171                               "should be between 0 and 100"), val);
2172        }
2173
2174        return -1; /* default value */
2175}
2176
2177int git_config_get_fsmonitor(void)
2178{
2179        if (git_config_get_pathname("core.fsmonitor", &core_fsmonitor))
2180                core_fsmonitor = getenv("GIT_FSMONITOR_TEST");
2181
2182        if (core_fsmonitor && !*core_fsmonitor)
2183                core_fsmonitor = NULL;
2184
2185        if (core_fsmonitor)
2186                return 1;
2187
2188        return 0;
2189}
2190
2191NORETURN
2192void git_die_config_linenr(const char *key, const char *filename, int linenr)
2193{
2194        if (!filename)
2195                die(_("unable to parse '%s' from command-line config"), key);
2196        else
2197                die(_("bad config variable '%s' in file '%s' at line %d"),
2198                    key, filename, linenr);
2199}
2200
2201NORETURN __attribute__((format(printf, 2, 3)))
2202void git_die_config(const char *key, const char *err, ...)
2203{
2204        const struct string_list *values;
2205        struct key_value_info *kv_info;
2206
2207        if (err) {
2208                va_list params;
2209                va_start(params, err);
2210                vreportf("error: ", err, params);
2211                va_end(params);
2212        }
2213        values = git_config_get_value_multi(key);
2214        kv_info = values->items[values->nr - 1].util;
2215        git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2216}
2217
2218/*
2219 * Find all the stuff for git_config_set() below.
2220 */
2221
2222static struct {
2223        int baselen;
2224        char *key;
2225        int do_not_match;
2226        regex_t *value_regex;
2227        int multi_replace;
2228        size_t *offset;
2229        unsigned int offset_alloc;
2230        enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
2231        unsigned int seen;
2232} store;
2233
2234static int matches(const char *key, const char *value)
2235{
2236        if (strcmp(key, store.key))
2237                return 0; /* not ours */
2238        if (!store.value_regex)
2239                return 1; /* always matches */
2240        if (store.value_regex == CONFIG_REGEX_NONE)
2241                return 0; /* never matches */
2242
2243        return store.do_not_match ^
2244                (value && !regexec(store.value_regex, value, 0, NULL, 0));
2245}
2246
2247static int store_aux(const char *key, const char *value, void *cb)
2248{
2249        const char *ep;
2250        size_t section_len;
2251
2252        switch (store.state) {
2253        case KEY_SEEN:
2254                if (matches(key, value)) {
2255                        if (store.seen == 1 && store.multi_replace == 0) {
2256                                warning(_("%s has multiple values"), key);
2257                        }
2258
2259                        ALLOC_GROW(store.offset, store.seen + 1,
2260                                   store.offset_alloc);
2261
2262                        store.offset[store.seen] = cf->do_ftell(cf);
2263                        store.seen++;
2264                }
2265                break;
2266        case SECTION_SEEN:
2267                /*
2268                 * What we are looking for is in store.key (both
2269                 * section and var), and its section part is baselen
2270                 * long.  We found key (again, both section and var).
2271                 * We would want to know if this key is in the same
2272                 * section as what we are looking for.  We already
2273                 * know we are in the same section as what should
2274                 * hold store.key.
2275                 */
2276                ep = strrchr(key, '.');
2277                section_len = ep - key;
2278
2279                if ((section_len != store.baselen) ||
2280                    memcmp(key, store.key, section_len+1)) {
2281                        store.state = SECTION_END_SEEN;
2282                        break;
2283                }
2284
2285                /*
2286                 * Do not increment matches: this is no match, but we
2287                 * just made sure we are in the desired section.
2288                 */
2289                ALLOC_GROW(store.offset, store.seen + 1,
2290                           store.offset_alloc);
2291                store.offset[store.seen] = cf->do_ftell(cf);
2292                /* fallthru */
2293        case SECTION_END_SEEN:
2294        case START:
2295                if (matches(key, value)) {
2296                        ALLOC_GROW(store.offset, store.seen + 1,
2297                                   store.offset_alloc);
2298                        store.offset[store.seen] = cf->do_ftell(cf);
2299                        store.state = KEY_SEEN;
2300                        store.seen++;
2301                } else {
2302                        if (strrchr(key, '.') - key == store.baselen &&
2303                              !strncmp(key, store.key, store.baselen)) {
2304                                        store.state = SECTION_SEEN;
2305                                        ALLOC_GROW(store.offset,
2306                                                   store.seen + 1,
2307                                                   store.offset_alloc);
2308                                        store.offset[store.seen] = cf->do_ftell(cf);
2309                        }
2310                }
2311        }
2312        return 0;
2313}
2314
2315static int write_error(const char *filename)
2316{
2317        error("failed to write new configuration file %s", filename);
2318
2319        /* Same error code as "failed to rename". */
2320        return 4;
2321}
2322
2323static struct strbuf store_create_section(const char *key)
2324{
2325        const char *dot;
2326        int i;
2327        struct strbuf sb = STRBUF_INIT;
2328
2329        dot = memchr(key, '.', store.baselen);
2330        if (dot) {
2331                strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2332                for (i = dot - key + 1; i < store.baselen; i++) {
2333                        if (key[i] == '"' || key[i] == '\\')
2334                                strbuf_addch(&sb, '\\');
2335                        strbuf_addch(&sb, key[i]);
2336                }
2337                strbuf_addstr(&sb, "\"]\n");
2338        } else {
2339                strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
2340        }
2341
2342        return sb;
2343}
2344
2345static ssize_t write_section(int fd, const char *key)
2346{
2347        struct strbuf sb = store_create_section(key);
2348        ssize_t ret;
2349
2350        ret = write_in_full(fd, sb.buf, sb.len);
2351        strbuf_release(&sb);
2352
2353        return ret;
2354}
2355
2356static ssize_t write_pair(int fd, const char *key, const char *value)
2357{
2358        int i;
2359        ssize_t ret;
2360        int length = strlen(key + store.baselen + 1);
2361        const char *quote = "";
2362        struct strbuf sb = STRBUF_INIT;
2363
2364        /*
2365         * Check to see if the value needs to be surrounded with a dq pair.
2366         * Note that problematic characters are always backslash-quoted; this
2367         * check is about not losing leading or trailing SP and strings that
2368         * follow beginning-of-comment characters (i.e. ';' and '#') by the
2369         * configuration parser.
2370         */
2371        if (value[0] == ' ')
2372                quote = "\"";
2373        for (i = 0; value[i]; i++)
2374                if (value[i] == ';' || value[i] == '#')
2375                        quote = "\"";
2376        if (i && value[i - 1] == ' ')
2377                quote = "\"";
2378
2379        strbuf_addf(&sb, "\t%.*s = %s",
2380                    length, key + store.baselen + 1, quote);
2381
2382        for (i = 0; value[i]; i++)
2383                switch (value[i]) {
2384                case '\n':
2385                        strbuf_addstr(&sb, "\\n");
2386                        break;
2387                case '\t':
2388                        strbuf_addstr(&sb, "\\t");
2389                        break;
2390                case '"':
2391                case '\\':
2392                        strbuf_addch(&sb, '\\');
2393                        /* fallthrough */
2394                default:
2395                        strbuf_addch(&sb, value[i]);
2396                        break;
2397                }
2398        strbuf_addf(&sb, "%s\n", quote);
2399
2400        ret = write_in_full(fd, sb.buf, sb.len);
2401        strbuf_release(&sb);
2402
2403        return ret;
2404}
2405
2406static ssize_t find_beginning_of_line(const char *contents, size_t size,
2407        size_t offset_, int *found_bracket)
2408{
2409        size_t equal_offset = size, bracket_offset = size;
2410        ssize_t offset;
2411
2412contline:
2413        for (offset = offset_-2; offset > 0
2414                        && contents[offset] != '\n'; offset--)
2415                switch (contents[offset]) {
2416                        case '=': equal_offset = offset; break;
2417                        case ']': bracket_offset = offset; break;
2418                }
2419        if (offset > 0 && contents[offset-1] == '\\') {
2420                offset_ = offset;
2421                goto contline;
2422        }
2423        if (bracket_offset < equal_offset) {
2424                *found_bracket = 1;
2425                offset = bracket_offset+1;
2426        } else
2427                offset++;
2428
2429        return offset;
2430}
2431
2432int git_config_set_in_file_gently(const char *config_filename,
2433                                  const char *key, const char *value)
2434{
2435        return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2436}
2437
2438void git_config_set_in_file(const char *config_filename,
2439                            const char *key, const char *value)
2440{
2441        git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2442}
2443
2444int git_config_set_gently(const char *key, const char *value)
2445{
2446        return git_config_set_multivar_gently(key, value, NULL, 0);
2447}
2448
2449void git_config_set(const char *key, const char *value)
2450{
2451        git_config_set_multivar(key, value, NULL, 0);
2452}
2453
2454/*
2455 * If value==NULL, unset in (remove from) config,
2456 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2457 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2458 *     (only add a new one)
2459 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2460 *     else all matching key/values (regardless how many) are removed,
2461 *     before the new pair is written.
2462 *
2463 * Returns 0 on success.
2464 *
2465 * This function does this:
2466 *
2467 * - it locks the config file by creating ".git/config.lock"
2468 *
2469 * - it then parses the config using store_aux() as validator to find
2470 *   the position on the key/value pair to replace. If it is to be unset,
2471 *   it must be found exactly once.
2472 *
2473 * - the config file is mmap()ed and the part before the match (if any) is
2474 *   written to the lock file, then the changed part and the rest.
2475 *
2476 * - the config file is removed and the lock file rename()d to it.
2477 *
2478 */
2479int git_config_set_multivar_in_file_gently(const char *config_filename,
2480                                           const char *key, const char *value,
2481                                           const char *value_regex,
2482                                           int multi_replace)
2483{
2484        int fd = -1, in_fd = -1;
2485        int ret;
2486        struct lock_file lock = LOCK_INIT;
2487        char *filename_buf = NULL;
2488        char *contents = NULL;
2489        size_t contents_sz;
2490
2491        /* parse-key returns negative; flip the sign to feed exit(3) */
2492        ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2493        if (ret)
2494                goto out_free;
2495
2496        store.multi_replace = multi_replace;
2497
2498        if (!config_filename)
2499                config_filename = filename_buf = git_pathdup("config");
2500
2501        /*
2502         * The lock serves a purpose in addition to locking: the new
2503         * contents of .git/config will be written into it.
2504         */
2505        fd = hold_lock_file_for_update(&lock, config_filename, 0);
2506        if (fd < 0) {
2507                error_errno("could not lock config file %s", config_filename);
2508                free(store.key);
2509                ret = CONFIG_NO_LOCK;
2510                goto out_free;
2511        }
2512
2513        /*
2514         * If .git/config does not exist yet, write a minimal version.
2515         */
2516        in_fd = open(config_filename, O_RDONLY);
2517        if ( in_fd < 0 ) {
2518                free(store.key);
2519
2520                if ( ENOENT != errno ) {
2521                        error_errno("opening %s", config_filename);
2522                        ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2523                        goto out_free;
2524                }
2525                /* if nothing to unset, error out */
2526                if (value == NULL) {
2527                        ret = CONFIG_NOTHING_SET;
2528                        goto out_free;
2529                }
2530
2531                store.key = (char *)key;
2532                if (write_section(fd, key) < 0 ||
2533                    write_pair(fd, key, value) < 0)
2534                        goto write_err_out;
2535        } else {
2536                struct stat st;
2537                size_t copy_begin, copy_end;
2538                int i, new_line = 0;
2539
2540                if (value_regex == NULL)
2541                        store.value_regex = NULL;
2542                else if (value_regex == CONFIG_REGEX_NONE)
2543                        store.value_regex = CONFIG_REGEX_NONE;
2544                else {
2545                        if (value_regex[0] == '!') {
2546                                store.do_not_match = 1;
2547                                value_regex++;
2548                        } else
2549                                store.do_not_match = 0;
2550
2551                        store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2552                        if (regcomp(store.value_regex, value_regex,
2553                                        REG_EXTENDED)) {
2554                                error("invalid pattern: %s", value_regex);
2555                                free(store.value_regex);
2556                                ret = CONFIG_INVALID_PATTERN;
2557                                goto out_free;
2558                        }
2559                }
2560
2561                ALLOC_GROW(store.offset, 1, store.offset_alloc);
2562                store.offset[0] = 0;
2563                store.state = START;
2564                store.seen = 0;
2565
2566                /*
2567                 * After this, store.offset will contain the *end* offset
2568                 * of the last match, or remain at 0 if no match was found.
2569                 * As a side effect, we make sure to transform only a valid
2570                 * existing config file.
2571                 */
2572                if (git_config_from_file(store_aux, config_filename, NULL)) {
2573                        error("invalid config file %s", config_filename);
2574                        free(store.key);
2575                        if (store.value_regex != NULL &&
2576                            store.value_regex != CONFIG_REGEX_NONE) {
2577                                regfree(store.value_regex);
2578                                free(store.value_regex);
2579                        }
2580                        ret = CONFIG_INVALID_FILE;
2581                        goto out_free;
2582                }
2583
2584                free(store.key);
2585                if (store.value_regex != NULL &&
2586                    store.value_regex != CONFIG_REGEX_NONE) {
2587                        regfree(store.value_regex);
2588                        free(store.value_regex);
2589                }
2590
2591                /* if nothing to unset, or too many matches, error out */
2592                if ((store.seen == 0 && value == NULL) ||
2593                                (store.seen > 1 && multi_replace == 0)) {
2594                        ret = CONFIG_NOTHING_SET;
2595                        goto out_free;
2596                }
2597
2598                if (fstat(in_fd, &st) == -1) {
2599                        error_errno(_("fstat on %s failed"), config_filename);
2600                        ret = CONFIG_INVALID_FILE;
2601                        goto out_free;
2602                }
2603
2604                contents_sz = xsize_t(st.st_size);
2605                contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2606                                        MAP_PRIVATE, in_fd, 0);
2607                if (contents == MAP_FAILED) {
2608                        if (errno == ENODEV && S_ISDIR(st.st_mode))
2609                                errno = EISDIR;
2610                        error_errno("unable to mmap '%s'", config_filename);
2611                        ret = CONFIG_INVALID_FILE;
2612                        contents = NULL;
2613                        goto out_free;
2614                }
2615                close(in_fd);
2616                in_fd = -1;
2617
2618                if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
2619                        error_errno("chmod on %s failed", get_lock_file_path(&lock));
2620                        ret = CONFIG_NO_WRITE;
2621                        goto out_free;
2622                }
2623
2624                if (store.seen == 0)
2625                        store.seen = 1;
2626
2627                for (i = 0, copy_begin = 0; i < store.seen; i++) {
2628                        if (store.offset[i] == 0) {
2629                                store.offset[i] = copy_end = contents_sz;
2630                        } else if (store.state != KEY_SEEN) {
2631                                copy_end = store.offset[i];
2632                        } else
2633                                copy_end = find_beginning_of_line(
2634                                        contents, contents_sz,
2635                                        store.offset[i]-2, &new_line);
2636
2637                        if (copy_end > 0 && contents[copy_end-1] != '\n')
2638                                new_line = 1;
2639
2640                        /* write the first part of the config */
2641                        if (copy_end > copy_begin) {
2642                                if (write_in_full(fd, contents + copy_begin,
2643                                                  copy_end - copy_begin) < 0)
2644                                        goto write_err_out;
2645                                if (new_line &&
2646                                    write_str_in_full(fd, "\n") < 0)
2647                                        goto write_err_out;
2648                        }
2649                        copy_begin = store.offset[i];
2650                }
2651
2652                /* write the pair (value == NULL means unset) */
2653                if (value != NULL) {
2654                        if (store.state == START) {
2655                                if (write_section(fd, key) < 0)
2656                                        goto write_err_out;
2657                        }
2658                        if (write_pair(fd, key, value) < 0)
2659                                goto write_err_out;
2660                }
2661
2662                /* write the rest of the config */
2663                if (copy_begin < contents_sz)
2664                        if (write_in_full(fd, contents + copy_begin,
2665                                          contents_sz - copy_begin) < 0)
2666                                goto write_err_out;
2667
2668                munmap(contents, contents_sz);
2669                contents = NULL;
2670        }
2671
2672        if (commit_lock_file(&lock) < 0) {
2673                error_errno("could not write config file %s", config_filename);
2674                ret = CONFIG_NO_WRITE;
2675                goto out_free;
2676        }
2677
2678        ret = 0;
2679
2680        /* Invalidate the config cache */
2681        git_config_clear();
2682
2683out_free:
2684        rollback_lock_file(&lock);
2685        free(filename_buf);
2686        if (contents)
2687                munmap(contents, contents_sz);
2688        if (in_fd >= 0)
2689                close(in_fd);
2690        return ret;
2691
2692write_err_out:
2693        ret = write_error(get_lock_file_path(&lock));
2694        goto out_free;
2695
2696}
2697
2698void git_config_set_multivar_in_file(const char *config_filename,
2699                                     const char *key, const char *value,
2700                                     const char *value_regex, int multi_replace)
2701{
2702        if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2703                                                    value_regex, multi_replace))
2704                return;
2705        if (value)
2706                die(_("could not set '%s' to '%s'"), key, value);
2707        else
2708                die(_("could not unset '%s'"), key);
2709}
2710
2711int git_config_set_multivar_gently(const char *key, const char *value,
2712                                   const char *value_regex, int multi_replace)
2713{
2714        return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2715                                                      multi_replace);
2716}
2717
2718void git_config_set_multivar(const char *key, const char *value,
2719                             const char *value_regex, int multi_replace)
2720{
2721        git_config_set_multivar_in_file(NULL, key, value, value_regex,
2722                                        multi_replace);
2723}
2724
2725static int section_name_match (const char *buf, const char *name)
2726{
2727        int i = 0, j = 0, dot = 0;
2728        if (buf[i] != '[')
2729                return 0;
2730        for (i = 1; buf[i] && buf[i] != ']'; i++) {
2731                if (!dot && isspace(buf[i])) {
2732                        dot = 1;
2733                        if (name[j++] != '.')
2734                                break;
2735                        for (i++; isspace(buf[i]); i++)
2736                                ; /* do nothing */
2737                        if (buf[i] != '"')
2738                                break;
2739                        continue;
2740                }
2741                if (buf[i] == '\\' && dot)
2742                        i++;
2743                else if (buf[i] == '"' && dot) {
2744                        for (i++; isspace(buf[i]); i++)
2745                                ; /* do_nothing */
2746                        break;
2747                }
2748                if (buf[i] != name[j++])
2749                        break;
2750        }
2751        if (buf[i] == ']' && name[j] == 0) {
2752                /*
2753                 * We match, now just find the right length offset by
2754                 * gobbling up any whitespace after it, as well
2755                 */
2756                i++;
2757                for (; buf[i] && isspace(buf[i]); i++)
2758                        ; /* do nothing */
2759                return i;
2760        }
2761        return 0;
2762}
2763
2764static int section_name_is_ok(const char *name)
2765{
2766        /* Empty section names are bogus. */
2767        if (!*name)
2768                return 0;
2769
2770        /*
2771         * Before a dot, we must be alphanumeric or dash. After the first dot,
2772         * anything goes, so we can stop checking.
2773         */
2774        for (; *name && *name != '.'; name++)
2775                if (*name != '-' && !isalnum(*name))
2776                        return 0;
2777        return 1;
2778}
2779
2780/* if new_name == NULL, the section is removed instead */
2781static int git_config_copy_or_rename_section_in_file(const char *config_filename,
2782                                      const char *old_name, const char *new_name, int copy)
2783{
2784        int ret = 0, remove = 0;
2785        char *filename_buf = NULL;
2786        struct lock_file lock = LOCK_INIT;
2787        int out_fd;
2788        char buf[1024];
2789        FILE *config_file = NULL;
2790        struct stat st;
2791        struct strbuf copystr = STRBUF_INIT;
2792
2793        if (new_name && !section_name_is_ok(new_name)) {
2794                ret = error("invalid section name: %s", new_name);
2795                goto out_no_rollback;
2796        }
2797
2798        if (!config_filename)
2799                config_filename = filename_buf = git_pathdup("config");
2800
2801        out_fd = hold_lock_file_for_update(&lock, config_filename, 0);
2802        if (out_fd < 0) {
2803                ret = error("could not lock config file %s", config_filename);
2804                goto out;
2805        }
2806
2807        if (!(config_file = fopen(config_filename, "rb"))) {
2808                ret = warn_on_fopen_errors(config_filename);
2809                if (ret)
2810                        goto out;
2811                /* no config file means nothing to rename, no error */
2812                goto commit_and_out;
2813        }
2814
2815        if (fstat(fileno(config_file), &st) == -1) {
2816                ret = error_errno(_("fstat on %s failed"), config_filename);
2817                goto out;
2818        }
2819
2820        if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
2821                ret = error_errno("chmod on %s failed",
2822                                  get_lock_file_path(&lock));
2823                goto out;
2824        }
2825
2826        while (fgets(buf, sizeof(buf), config_file)) {
2827                int i;
2828                int length;
2829                int is_section = 0;
2830                char *output = buf;
2831                for (i = 0; buf[i] && isspace(buf[i]); i++)
2832                        ; /* do nothing */
2833                if (buf[i] == '[') {
2834                        /* it's a section */
2835                        int offset;
2836                        is_section = 1;
2837
2838                        /*
2839                         * When encountering a new section under -c we
2840                         * need to flush out any section we're already
2841                         * coping and begin anew. There might be
2842                         * multiple [branch "$name"] sections.
2843                         */
2844                        if (copystr.len > 0) {
2845                                if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
2846                                        ret = write_error(get_lock_file_path(&lock));
2847                                        goto out;
2848                                }
2849                                strbuf_reset(&copystr);
2850                        }
2851
2852                        offset = section_name_match(&buf[i], old_name);
2853                        if (offset > 0) {
2854                                ret++;
2855                                if (new_name == NULL) {
2856                                        remove = 1;
2857                                        continue;
2858                                }
2859                                store.baselen = strlen(new_name);
2860                                if (!copy) {
2861                                        if (write_section(out_fd, new_name) < 0) {
2862                                                ret = write_error(get_lock_file_path(&lock));
2863                                                goto out;
2864                                        }
2865                                        /*
2866                                         * We wrote out the new section, with
2867                                         * a newline, now skip the old
2868                                         * section's length
2869                                         */
2870                                        output += offset + i;
2871                                        if (strlen(output) > 0) {
2872                                                /*
2873                                                 * More content means there's
2874                                                 * a declaration to put on the
2875                                                 * next line; indent with a
2876                                                 * tab
2877                                                 */
2878                                                output -= 1;
2879                                                output[0] = '\t';
2880                                        }
2881                                } else {
2882                                        copystr = store_create_section(new_name);
2883                                }
2884                        }
2885                        remove = 0;
2886                }
2887                if (remove)
2888                        continue;
2889                length = strlen(output);
2890
2891                if (!is_section && copystr.len > 0) {
2892                        strbuf_add(&copystr, output, length);
2893                }
2894
2895                if (write_in_full(out_fd, output, length) < 0) {
2896                        ret = write_error(get_lock_file_path(&lock));
2897                        goto out;
2898                }
2899        }
2900
2901        /*
2902         * Copy a trailing section at the end of the config, won't be
2903         * flushed by the usual "flush because we have a new section
2904         * logic in the loop above.
2905         */
2906        if (copystr.len > 0) {
2907                if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
2908                        ret = write_error(get_lock_file_path(&lock));
2909                        goto out;
2910                }
2911                strbuf_reset(&copystr);
2912        }
2913
2914        fclose(config_file);
2915        config_file = NULL;
2916commit_and_out:
2917        if (commit_lock_file(&lock) < 0)
2918                ret = error_errno("could not write config file %s",
2919                                  config_filename);
2920out:
2921        if (config_file)
2922                fclose(config_file);
2923        rollback_lock_file(&lock);
2924out_no_rollback:
2925        free(filename_buf);
2926        return ret;
2927}
2928
2929int git_config_rename_section_in_file(const char *config_filename,
2930                                      const char *old_name, const char *new_name)
2931{
2932        return git_config_copy_or_rename_section_in_file(config_filename,
2933                                         old_name, new_name, 0);
2934}
2935
2936int git_config_rename_section(const char *old_name, const char *new_name)
2937{
2938        return git_config_rename_section_in_file(NULL, old_name, new_name);
2939}
2940
2941int git_config_copy_section_in_file(const char *config_filename,
2942                                      const char *old_name, const char *new_name)
2943{
2944        return git_config_copy_or_rename_section_in_file(config_filename,
2945                                         old_name, new_name, 1);
2946}
2947
2948int git_config_copy_section(const char *old_name, const char *new_name)
2949{
2950        return git_config_copy_section_in_file(NULL, old_name, new_name);
2951}
2952
2953/*
2954 * Call this to report error for your variable that should not
2955 * get a boolean value (i.e. "[my] var" means "true").
2956 */
2957#undef config_error_nonbool
2958int config_error_nonbool(const char *var)
2959{
2960        return error("missing value for '%s'", var);
2961}
2962
2963int parse_config_key(const char *var,
2964                     const char *section,
2965                     const char **subsection, int *subsection_len,
2966                     const char **key)
2967{
2968        const char *dot;
2969
2970        /* Does it start with "section." ? */
2971        if (!skip_prefix(var, section, &var) || *var != '.')
2972                return -1;
2973
2974        /*
2975         * Find the key; we don't know yet if we have a subsection, but we must
2976         * parse backwards from the end, since the subsection may have dots in
2977         * it, too.
2978         */
2979        dot = strrchr(var, '.');
2980        *key = dot + 1;
2981
2982        /* Did we have a subsection at all? */
2983        if (dot == var) {
2984                if (subsection) {
2985                        *subsection = NULL;
2986                        *subsection_len = 0;
2987                }
2988        }
2989        else {
2990                if (!subsection)
2991                        return -1;
2992                *subsection = var + 1;
2993                *subsection_len = dot - *subsection;
2994        }
2995
2996        return 0;
2997}
2998
2999const char *current_config_origin_type(void)
3000{
3001        int type;
3002        if (current_config_kvi)
3003                type = current_config_kvi->origin_type;
3004        else if(cf)
3005                type = cf->origin_type;
3006        else
3007                die("BUG: current_config_origin_type called outside config callback");
3008
3009        switch (type) {
3010        case CONFIG_ORIGIN_BLOB:
3011                return "blob";
3012        case CONFIG_ORIGIN_FILE:
3013                return "file";
3014        case CONFIG_ORIGIN_STDIN:
3015                return "standard input";
3016        case CONFIG_ORIGIN_SUBMODULE_BLOB:
3017                return "submodule-blob";
3018        case CONFIG_ORIGIN_CMDLINE:
3019                return "command line";
3020        default:
3021                die("BUG: unknown config origin type");
3022        }
3023}
3024
3025const char *current_config_name(void)
3026{
3027        const char *name;
3028        if (current_config_kvi)
3029                name = current_config_kvi->filename;
3030        else if (cf)
3031                name = cf->name;
3032        else
3033                die("BUG: current_config_name called outside config callback");
3034        return name ? name : "";
3035}
3036
3037enum config_scope current_config_scope(void)
3038{
3039        if (current_config_kvi)
3040                return current_config_kvi->scope;
3041        else
3042                return current_parsing_scope;
3043}