config.con commit Merge branch 'bw/protocol-v2' into jt/partial-clone-proto-v2 (ea44c0a)
   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        int ret;
1430
1431        top.u.file = f;
1432        top.origin_type = origin_type;
1433        top.name = name;
1434        top.path = path;
1435        top.die_on_error = 1;
1436        top.do_fgetc = config_file_fgetc;
1437        top.do_ungetc = config_file_ungetc;
1438        top.do_ftell = config_file_ftell;
1439
1440        flockfile(f);
1441        ret = do_config_from(&top, fn, data);
1442        funlockfile(f);
1443        return ret;
1444}
1445
1446static int git_config_from_stdin(config_fn_t fn, void *data)
1447{
1448        return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin, data);
1449}
1450
1451int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1452{
1453        int ret = -1;
1454        FILE *f;
1455
1456        f = fopen_or_warn(filename, "r");
1457        if (f) {
1458                ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename, filename, f, data);
1459                fclose(f);
1460        }
1461        return ret;
1462}
1463
1464int git_config_from_mem(config_fn_t fn, const enum config_origin_type origin_type,
1465                        const char *name, const char *buf, size_t len, void *data)
1466{
1467        struct config_source top;
1468
1469        top.u.buf.buf = buf;
1470        top.u.buf.len = len;
1471        top.u.buf.pos = 0;
1472        top.origin_type = origin_type;
1473        top.name = name;
1474        top.path = NULL;
1475        top.die_on_error = 0;
1476        top.do_fgetc = config_buf_fgetc;
1477        top.do_ungetc = config_buf_ungetc;
1478        top.do_ftell = config_buf_ftell;
1479
1480        return do_config_from(&top, fn, data);
1481}
1482
1483int git_config_from_blob_oid(config_fn_t fn,
1484                              const char *name,
1485                              const struct object_id *oid,
1486                              void *data)
1487{
1488        enum object_type type;
1489        char *buf;
1490        unsigned long size;
1491        int ret;
1492
1493        buf = read_object_file(oid, &type, &size);
1494        if (!buf)
1495                return error("unable to load config blob object '%s'", name);
1496        if (type != OBJ_BLOB) {
1497                free(buf);
1498                return error("reference '%s' does not point to a blob", name);
1499        }
1500
1501        ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size, data);
1502        free(buf);
1503
1504        return ret;
1505}
1506
1507static int git_config_from_blob_ref(config_fn_t fn,
1508                                    const char *name,
1509                                    void *data)
1510{
1511        struct object_id oid;
1512
1513        if (get_oid(name, &oid) < 0)
1514                return error("unable to resolve config blob '%s'", name);
1515        return git_config_from_blob_oid(fn, name, &oid, data);
1516}
1517
1518const char *git_etc_gitconfig(void)
1519{
1520        static const char *system_wide;
1521        if (!system_wide)
1522                system_wide = system_path(ETC_GITCONFIG);
1523        return system_wide;
1524}
1525
1526/*
1527 * Parse environment variable 'k' as a boolean (in various
1528 * possible spellings); if missing, use the default value 'def'.
1529 */
1530int git_env_bool(const char *k, int def)
1531{
1532        const char *v = getenv(k);
1533        return v ? git_config_bool(k, v) : def;
1534}
1535
1536/*
1537 * Parse environment variable 'k' as ulong with possibly a unit
1538 * suffix; if missing, use the default value 'val'.
1539 */
1540unsigned long git_env_ulong(const char *k, unsigned long val)
1541{
1542        const char *v = getenv(k);
1543        if (v && !git_parse_ulong(v, &val))
1544                die("failed to parse %s", k);
1545        return val;
1546}
1547
1548int git_config_system(void)
1549{
1550        return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1551}
1552
1553static int do_git_config_sequence(const struct config_options *opts,
1554                                  config_fn_t fn, void *data)
1555{
1556        int ret = 0;
1557        char *xdg_config = xdg_config_home("config");
1558        char *user_config = expand_user_path("~/.gitconfig", 0);
1559        char *repo_config;
1560
1561        if (opts->commondir)
1562                repo_config = mkpathdup("%s/config", opts->commondir);
1563        else
1564                repo_config = NULL;
1565
1566        current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1567        if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0))
1568                ret += git_config_from_file(fn, git_etc_gitconfig(),
1569                                            data);
1570
1571        current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1572        if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1573                ret += git_config_from_file(fn, xdg_config, data);
1574
1575        if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1576                ret += git_config_from_file(fn, user_config, data);
1577
1578        current_parsing_scope = CONFIG_SCOPE_REPO;
1579        if (repo_config && !access_or_die(repo_config, R_OK, 0))
1580                ret += git_config_from_file(fn, repo_config, data);
1581
1582        current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1583        if (git_config_from_parameters(fn, data) < 0)
1584                die(_("unable to parse command-line config"));
1585
1586        current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1587        free(xdg_config);
1588        free(user_config);
1589        free(repo_config);
1590        return ret;
1591}
1592
1593int config_with_options(config_fn_t fn, void *data,
1594                        struct git_config_source *config_source,
1595                        const struct config_options *opts)
1596{
1597        struct config_include_data inc = CONFIG_INCLUDE_INIT;
1598
1599        if (opts->respect_includes) {
1600                inc.fn = fn;
1601                inc.data = data;
1602                inc.opts = opts;
1603                fn = git_config_include;
1604                data = &inc;
1605        }
1606
1607        /*
1608         * If we have a specific filename, use it. Otherwise, follow the
1609         * regular lookup sequence.
1610         */
1611        if (config_source && config_source->use_stdin)
1612                return git_config_from_stdin(fn, data);
1613        else if (config_source && config_source->file)
1614                return git_config_from_file(fn, config_source->file, data);
1615        else if (config_source && config_source->blob)
1616                return git_config_from_blob_ref(fn, config_source->blob, data);
1617
1618        return do_git_config_sequence(opts, fn, data);
1619}
1620
1621static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1622{
1623        int i, value_index;
1624        struct string_list *values;
1625        struct config_set_element *entry;
1626        struct configset_list *list = &cs->list;
1627
1628        for (i = 0; i < list->nr; i++) {
1629                entry = list->items[i].e;
1630                value_index = list->items[i].value_index;
1631                values = &entry->value_list;
1632
1633                current_config_kvi = values->items[value_index].util;
1634
1635                if (fn(entry->key, values->items[value_index].string, data) < 0)
1636                        git_die_config_linenr(entry->key,
1637                                              current_config_kvi->filename,
1638                                              current_config_kvi->linenr);
1639
1640                current_config_kvi = NULL;
1641        }
1642}
1643
1644void read_early_config(config_fn_t cb, void *data)
1645{
1646        struct config_options opts = {0};
1647        struct strbuf commondir = STRBUF_INIT;
1648        struct strbuf gitdir = STRBUF_INIT;
1649
1650        opts.respect_includes = 1;
1651
1652        if (have_git_dir()) {
1653                opts.commondir = get_git_common_dir();
1654                opts.git_dir = get_git_dir();
1655        /*
1656         * When setup_git_directory() was not yet asked to discover the
1657         * GIT_DIR, we ask discover_git_directory() to figure out whether there
1658         * is any repository config we should use (but unlike
1659         * setup_git_directory_gently(), no global state is changed, most
1660         * notably, the current working directory is still the same after the
1661         * call).
1662         */
1663        } else if (!discover_git_directory(&commondir, &gitdir)) {
1664                opts.commondir = commondir.buf;
1665                opts.git_dir = gitdir.buf;
1666        }
1667
1668        config_with_options(cb, data, NULL, &opts);
1669
1670        strbuf_release(&commondir);
1671        strbuf_release(&gitdir);
1672}
1673
1674static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1675{
1676        struct config_set_element k;
1677        struct config_set_element *found_entry;
1678        char *normalized_key;
1679        /*
1680         * `key` may come from the user, so normalize it before using it
1681         * for querying entries from the hashmap.
1682         */
1683        if (git_config_parse_key(key, &normalized_key, NULL))
1684                return NULL;
1685
1686        hashmap_entry_init(&k, strhash(normalized_key));
1687        k.key = normalized_key;
1688        found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1689        free(normalized_key);
1690        return found_entry;
1691}
1692
1693static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1694{
1695        struct config_set_element *e;
1696        struct string_list_item *si;
1697        struct configset_list_item *l_item;
1698        struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1699
1700        e = configset_find_element(cs, key);
1701        /*
1702         * Since the keys are being fed by git_config*() callback mechanism, they
1703         * are already normalized. So simply add them without any further munging.
1704         */
1705        if (!e) {
1706                e = xmalloc(sizeof(*e));
1707                hashmap_entry_init(e, strhash(key));
1708                e->key = xstrdup(key);
1709                string_list_init(&e->value_list, 1);
1710                hashmap_add(&cs->config_hash, e);
1711        }
1712        si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1713
1714        ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1715        l_item = &cs->list.items[cs->list.nr++];
1716        l_item->e = e;
1717        l_item->value_index = e->value_list.nr - 1;
1718
1719        if (!cf)
1720                die("BUG: configset_add_value has no source");
1721        if (cf->name) {
1722                kv_info->filename = strintern(cf->name);
1723                kv_info->linenr = cf->linenr;
1724                kv_info->origin_type = cf->origin_type;
1725        } else {
1726                /* for values read from `git_config_from_parameters()` */
1727                kv_info->filename = NULL;
1728                kv_info->linenr = -1;
1729                kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1730        }
1731        kv_info->scope = current_parsing_scope;
1732        si->util = kv_info;
1733
1734        return 0;
1735}
1736
1737static int config_set_element_cmp(const void *unused_cmp_data,
1738                                  const void *entry,
1739                                  const void *entry_or_key,
1740                                  const void *unused_keydata)
1741{
1742        const struct config_set_element *e1 = entry;
1743        const struct config_set_element *e2 = entry_or_key;
1744
1745        return strcmp(e1->key, e2->key);
1746}
1747
1748void git_configset_init(struct config_set *cs)
1749{
1750        hashmap_init(&cs->config_hash, config_set_element_cmp, NULL, 0);
1751        cs->hash_initialized = 1;
1752        cs->list.nr = 0;
1753        cs->list.alloc = 0;
1754        cs->list.items = NULL;
1755}
1756
1757void git_configset_clear(struct config_set *cs)
1758{
1759        struct config_set_element *entry;
1760        struct hashmap_iter iter;
1761        if (!cs->hash_initialized)
1762                return;
1763
1764        hashmap_iter_init(&cs->config_hash, &iter);
1765        while ((entry = hashmap_iter_next(&iter))) {
1766                free(entry->key);
1767                string_list_clear(&entry->value_list, 1);
1768        }
1769        hashmap_free(&cs->config_hash, 1);
1770        cs->hash_initialized = 0;
1771        free(cs->list.items);
1772        cs->list.nr = 0;
1773        cs->list.alloc = 0;
1774        cs->list.items = NULL;
1775}
1776
1777static int config_set_callback(const char *key, const char *value, void *cb)
1778{
1779        struct config_set *cs = cb;
1780        configset_add_value(cs, key, value);
1781        return 0;
1782}
1783
1784int git_configset_add_file(struct config_set *cs, const char *filename)
1785{
1786        return git_config_from_file(config_set_callback, filename, cs);
1787}
1788
1789int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1790{
1791        const struct string_list *values = NULL;
1792        /*
1793         * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1794         * queried key in the files of the configset, the value returned will be the last
1795         * value in the value list for that key.
1796         */
1797        values = git_configset_get_value_multi(cs, key);
1798
1799        if (!values)
1800                return 1;
1801        assert(values->nr > 0);
1802        *value = values->items[values->nr - 1].string;
1803        return 0;
1804}
1805
1806const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1807{
1808        struct config_set_element *e = configset_find_element(cs, key);
1809        return e ? &e->value_list : NULL;
1810}
1811
1812int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1813{
1814        const char *value;
1815        if (!git_configset_get_value(cs, key, &value))
1816                return git_config_string(dest, key, value);
1817        else
1818                return 1;
1819}
1820
1821int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1822{
1823        return git_configset_get_string_const(cs, key, (const char **)dest);
1824}
1825
1826int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1827{
1828        const char *value;
1829        if (!git_configset_get_value(cs, key, &value)) {
1830                *dest = git_config_int(key, value);
1831                return 0;
1832        } else
1833                return 1;
1834}
1835
1836int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1837{
1838        const char *value;
1839        if (!git_configset_get_value(cs, key, &value)) {
1840                *dest = git_config_ulong(key, value);
1841                return 0;
1842        } else
1843                return 1;
1844}
1845
1846int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1847{
1848        const char *value;
1849        if (!git_configset_get_value(cs, key, &value)) {
1850                *dest = git_config_bool(key, value);
1851                return 0;
1852        } else
1853                return 1;
1854}
1855
1856int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1857                                int *is_bool, int *dest)
1858{
1859        const char *value;
1860        if (!git_configset_get_value(cs, key, &value)) {
1861                *dest = git_config_bool_or_int(key, value, is_bool);
1862                return 0;
1863        } else
1864                return 1;
1865}
1866
1867int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1868{
1869        const char *value;
1870        if (!git_configset_get_value(cs, key, &value)) {
1871                *dest = git_parse_maybe_bool(value);
1872                if (*dest == -1)
1873                        return -1;
1874                return 0;
1875        } else
1876                return 1;
1877}
1878
1879int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1880{
1881        const char *value;
1882        if (!git_configset_get_value(cs, key, &value))
1883                return git_config_pathname(dest, key, value);
1884        else
1885                return 1;
1886}
1887
1888/* Functions use to read configuration from a repository */
1889static void repo_read_config(struct repository *repo)
1890{
1891        struct config_options opts;
1892
1893        opts.respect_includes = 1;
1894        opts.commondir = repo->commondir;
1895        opts.git_dir = repo->gitdir;
1896
1897        if (!repo->config)
1898                repo->config = xcalloc(1, sizeof(struct config_set));
1899        else
1900                git_configset_clear(repo->config);
1901
1902        git_configset_init(repo->config);
1903
1904        if (config_with_options(config_set_callback, repo->config, NULL, &opts) < 0)
1905                /*
1906                 * config_with_options() normally returns only
1907                 * zero, as most errors are fatal, and
1908                 * non-fatal potential errors are guarded by "if"
1909                 * statements that are entered only when no error is
1910                 * possible.
1911                 *
1912                 * If we ever encounter a non-fatal error, it means
1913                 * something went really wrong and we should stop
1914                 * immediately.
1915                 */
1916                die(_("unknown error occurred while reading the configuration files"));
1917}
1918
1919static void git_config_check_init(struct repository *repo)
1920{
1921        if (repo->config && repo->config->hash_initialized)
1922                return;
1923        repo_read_config(repo);
1924}
1925
1926static void repo_config_clear(struct repository *repo)
1927{
1928        if (!repo->config || !repo->config->hash_initialized)
1929                return;
1930        git_configset_clear(repo->config);
1931}
1932
1933void repo_config(struct repository *repo, config_fn_t fn, void *data)
1934{
1935        git_config_check_init(repo);
1936        configset_iter(repo->config, fn, data);
1937}
1938
1939int repo_config_get_value(struct repository *repo,
1940                          const char *key, const char **value)
1941{
1942        git_config_check_init(repo);
1943        return git_configset_get_value(repo->config, key, value);
1944}
1945
1946const struct string_list *repo_config_get_value_multi(struct repository *repo,
1947                                                      const char *key)
1948{
1949        git_config_check_init(repo);
1950        return git_configset_get_value_multi(repo->config, key);
1951}
1952
1953int repo_config_get_string_const(struct repository *repo,
1954                                 const char *key, const char **dest)
1955{
1956        int ret;
1957        git_config_check_init(repo);
1958        ret = git_configset_get_string_const(repo->config, key, dest);
1959        if (ret < 0)
1960                git_die_config(key, NULL);
1961        return ret;
1962}
1963
1964int repo_config_get_string(struct repository *repo,
1965                           const char *key, char **dest)
1966{
1967        git_config_check_init(repo);
1968        return repo_config_get_string_const(repo, key, (const char **)dest);
1969}
1970
1971int repo_config_get_int(struct repository *repo,
1972                        const char *key, int *dest)
1973{
1974        git_config_check_init(repo);
1975        return git_configset_get_int(repo->config, key, dest);
1976}
1977
1978int repo_config_get_ulong(struct repository *repo,
1979                          const char *key, unsigned long *dest)
1980{
1981        git_config_check_init(repo);
1982        return git_configset_get_ulong(repo->config, key, dest);
1983}
1984
1985int repo_config_get_bool(struct repository *repo,
1986                         const char *key, int *dest)
1987{
1988        git_config_check_init(repo);
1989        return git_configset_get_bool(repo->config, key, dest);
1990}
1991
1992int repo_config_get_bool_or_int(struct repository *repo,
1993                                const char *key, int *is_bool, int *dest)
1994{
1995        git_config_check_init(repo);
1996        return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
1997}
1998
1999int repo_config_get_maybe_bool(struct repository *repo,
2000                               const char *key, int *dest)
2001{
2002        git_config_check_init(repo);
2003        return git_configset_get_maybe_bool(repo->config, key, dest);
2004}
2005
2006int repo_config_get_pathname(struct repository *repo,
2007                             const char *key, const char **dest)
2008{
2009        int ret;
2010        git_config_check_init(repo);
2011        ret = git_configset_get_pathname(repo->config, key, dest);
2012        if (ret < 0)
2013                git_die_config(key, NULL);
2014        return ret;
2015}
2016
2017/* Functions used historically to read configuration from 'the_repository' */
2018void git_config(config_fn_t fn, void *data)
2019{
2020        repo_config(the_repository, fn, data);
2021}
2022
2023void git_config_clear(void)
2024{
2025        repo_config_clear(the_repository);
2026}
2027
2028int git_config_get_value(const char *key, const char **value)
2029{
2030        return repo_config_get_value(the_repository, key, value);
2031}
2032
2033const struct string_list *git_config_get_value_multi(const char *key)
2034{
2035        return repo_config_get_value_multi(the_repository, key);
2036}
2037
2038int git_config_get_string_const(const char *key, const char **dest)
2039{
2040        return repo_config_get_string_const(the_repository, key, dest);
2041}
2042
2043int git_config_get_string(const char *key, char **dest)
2044{
2045        return repo_config_get_string(the_repository, key, dest);
2046}
2047
2048int git_config_get_int(const char *key, int *dest)
2049{
2050        return repo_config_get_int(the_repository, key, dest);
2051}
2052
2053int git_config_get_ulong(const char *key, unsigned long *dest)
2054{
2055        return repo_config_get_ulong(the_repository, key, dest);
2056}
2057
2058int git_config_get_bool(const char *key, int *dest)
2059{
2060        return repo_config_get_bool(the_repository, key, dest);
2061}
2062
2063int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2064{
2065        return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2066}
2067
2068int git_config_get_maybe_bool(const char *key, int *dest)
2069{
2070        return repo_config_get_maybe_bool(the_repository, key, dest);
2071}
2072
2073int git_config_get_pathname(const char *key, const char **dest)
2074{
2075        return repo_config_get_pathname(the_repository, key, dest);
2076}
2077
2078/*
2079 * Note: This function exists solely to maintain backward compatibility with
2080 * 'fetch' and 'update_clone' storing configuration in '.gitmodules' and should
2081 * NOT be used anywhere else.
2082 *
2083 * Runs the provided config function on the '.gitmodules' file found in the
2084 * working directory.
2085 */
2086void config_from_gitmodules(config_fn_t fn, void *data)
2087{
2088        if (the_repository->worktree) {
2089                char *file = repo_worktree_path(the_repository, GITMODULES_FILE);
2090                git_config_from_file(fn, file, data);
2091                free(file);
2092        }
2093}
2094
2095int git_config_get_expiry(const char *key, const char **output)
2096{
2097        int ret = git_config_get_string_const(key, output);
2098        if (ret)
2099                return ret;
2100        if (strcmp(*output, "now")) {
2101                timestamp_t now = approxidate("now");
2102                if (approxidate(*output) >= now)
2103                        git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2104        }
2105        return ret;
2106}
2107
2108int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now)
2109{
2110        char *expiry_string;
2111        intmax_t days;
2112        timestamp_t when;
2113
2114        if (git_config_get_string(key, &expiry_string))
2115                return 1; /* no such thing */
2116
2117        if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
2118                const int scale = 86400;
2119                *expiry = now - days * scale;
2120                return 0;
2121        }
2122
2123        if (!parse_expiry_date(expiry_string, &when)) {
2124                *expiry = when;
2125                return 0;
2126        }
2127        return -1; /* thing exists but cannot be parsed */
2128}
2129
2130int git_config_get_untracked_cache(void)
2131{
2132        int val = -1;
2133        const char *v;
2134
2135        /* Hack for test programs like test-dump-untracked-cache */
2136        if (ignore_untracked_cache_config)
2137                return -1;
2138
2139        if (!git_config_get_maybe_bool("core.untrackedcache", &val))
2140                return val;
2141
2142        if (!git_config_get_value("core.untrackedcache", &v)) {
2143                if (!strcasecmp(v, "keep"))
2144                        return -1;
2145
2146                error(_("unknown core.untrackedCache value '%s'; "
2147                        "using 'keep' default value"), v);
2148                return -1;
2149        }
2150
2151        return -1; /* default value */
2152}
2153
2154int git_config_get_split_index(void)
2155{
2156        int val;
2157
2158        if (!git_config_get_maybe_bool("core.splitindex", &val))
2159                return val;
2160
2161        return -1; /* default value */
2162}
2163
2164int git_config_get_max_percent_split_change(void)
2165{
2166        int val = -1;
2167
2168        if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2169                if (0 <= val && val <= 100)
2170                        return val;
2171
2172                return error(_("splitIndex.maxPercentChange value '%d' "
2173                               "should be between 0 and 100"), val);
2174        }
2175
2176        return -1; /* default value */
2177}
2178
2179int git_config_get_fsmonitor(void)
2180{
2181        if (git_config_get_pathname("core.fsmonitor", &core_fsmonitor))
2182                core_fsmonitor = getenv("GIT_FSMONITOR_TEST");
2183
2184        if (core_fsmonitor && !*core_fsmonitor)
2185                core_fsmonitor = NULL;
2186
2187        if (core_fsmonitor)
2188                return 1;
2189
2190        return 0;
2191}
2192
2193NORETURN
2194void git_die_config_linenr(const char *key, const char *filename, int linenr)
2195{
2196        if (!filename)
2197                die(_("unable to parse '%s' from command-line config"), key);
2198        else
2199                die(_("bad config variable '%s' in file '%s' at line %d"),
2200                    key, filename, linenr);
2201}
2202
2203NORETURN __attribute__((format(printf, 2, 3)))
2204void git_die_config(const char *key, const char *err, ...)
2205{
2206        const struct string_list *values;
2207        struct key_value_info *kv_info;
2208
2209        if (err) {
2210                va_list params;
2211                va_start(params, err);
2212                vreportf("error: ", err, params);
2213                va_end(params);
2214        }
2215        values = git_config_get_value_multi(key);
2216        kv_info = values->items[values->nr - 1].util;
2217        git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2218}
2219
2220/*
2221 * Find all the stuff for git_config_set() below.
2222 */
2223
2224static struct {
2225        int baselen;
2226        char *key;
2227        int do_not_match;
2228        regex_t *value_regex;
2229        int multi_replace;
2230        size_t *offset;
2231        unsigned int offset_alloc;
2232        enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
2233        unsigned int seen;
2234} store;
2235
2236static int matches(const char *key, const char *value)
2237{
2238        if (strcmp(key, store.key))
2239                return 0; /* not ours */
2240        if (!store.value_regex)
2241                return 1; /* always matches */
2242        if (store.value_regex == CONFIG_REGEX_NONE)
2243                return 0; /* never matches */
2244
2245        return store.do_not_match ^
2246                (value && !regexec(store.value_regex, value, 0, NULL, 0));
2247}
2248
2249static int store_aux(const char *key, const char *value, void *cb)
2250{
2251        const char *ep;
2252        size_t section_len;
2253
2254        switch (store.state) {
2255        case KEY_SEEN:
2256                if (matches(key, value)) {
2257                        if (store.seen == 1 && store.multi_replace == 0) {
2258                                warning(_("%s has multiple values"), key);
2259                        }
2260
2261                        ALLOC_GROW(store.offset, store.seen + 1,
2262                                   store.offset_alloc);
2263
2264                        store.offset[store.seen] = cf->do_ftell(cf);
2265                        store.seen++;
2266                }
2267                break;
2268        case SECTION_SEEN:
2269                /*
2270                 * What we are looking for is in store.key (both
2271                 * section and var), and its section part is baselen
2272                 * long.  We found key (again, both section and var).
2273                 * We would want to know if this key is in the same
2274                 * section as what we are looking for.  We already
2275                 * know we are in the same section as what should
2276                 * hold store.key.
2277                 */
2278                ep = strrchr(key, '.');
2279                section_len = ep - key;
2280
2281                if ((section_len != store.baselen) ||
2282                    memcmp(key, store.key, section_len+1)) {
2283                        store.state = SECTION_END_SEEN;
2284                        break;
2285                }
2286
2287                /*
2288                 * Do not increment matches: this is no match, but we
2289                 * just made sure we are in the desired section.
2290                 */
2291                ALLOC_GROW(store.offset, store.seen + 1,
2292                           store.offset_alloc);
2293                store.offset[store.seen] = cf->do_ftell(cf);
2294                /* fallthru */
2295        case SECTION_END_SEEN:
2296        case START:
2297                if (matches(key, value)) {
2298                        ALLOC_GROW(store.offset, store.seen + 1,
2299                                   store.offset_alloc);
2300                        store.offset[store.seen] = cf->do_ftell(cf);
2301                        store.state = KEY_SEEN;
2302                        store.seen++;
2303                } else {
2304                        if (strrchr(key, '.') - key == store.baselen &&
2305                              !strncmp(key, store.key, store.baselen)) {
2306                                        store.state = SECTION_SEEN;
2307                                        ALLOC_GROW(store.offset,
2308                                                   store.seen + 1,
2309                                                   store.offset_alloc);
2310                                        store.offset[store.seen] = cf->do_ftell(cf);
2311                        }
2312                }
2313        }
2314        return 0;
2315}
2316
2317static int write_error(const char *filename)
2318{
2319        error("failed to write new configuration file %s", filename);
2320
2321        /* Same error code as "failed to rename". */
2322        return 4;
2323}
2324
2325static struct strbuf store_create_section(const char *key)
2326{
2327        const char *dot;
2328        int i;
2329        struct strbuf sb = STRBUF_INIT;
2330
2331        dot = memchr(key, '.', store.baselen);
2332        if (dot) {
2333                strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2334                for (i = dot - key + 1; i < store.baselen; i++) {
2335                        if (key[i] == '"' || key[i] == '\\')
2336                                strbuf_addch(&sb, '\\');
2337                        strbuf_addch(&sb, key[i]);
2338                }
2339                strbuf_addstr(&sb, "\"]\n");
2340        } else {
2341                strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
2342        }
2343
2344        return sb;
2345}
2346
2347static ssize_t write_section(int fd, const char *key)
2348{
2349        struct strbuf sb = store_create_section(key);
2350        ssize_t ret;
2351
2352        ret = write_in_full(fd, sb.buf, sb.len);
2353        strbuf_release(&sb);
2354
2355        return ret;
2356}
2357
2358static ssize_t write_pair(int fd, const char *key, const char *value)
2359{
2360        int i;
2361        ssize_t ret;
2362        int length = strlen(key + store.baselen + 1);
2363        const char *quote = "";
2364        struct strbuf sb = STRBUF_INIT;
2365
2366        /*
2367         * Check to see if the value needs to be surrounded with a dq pair.
2368         * Note that problematic characters are always backslash-quoted; this
2369         * check is about not losing leading or trailing SP and strings that
2370         * follow beginning-of-comment characters (i.e. ';' and '#') by the
2371         * configuration parser.
2372         */
2373        if (value[0] == ' ')
2374                quote = "\"";
2375        for (i = 0; value[i]; i++)
2376                if (value[i] == ';' || value[i] == '#')
2377                        quote = "\"";
2378        if (i && value[i - 1] == ' ')
2379                quote = "\"";
2380
2381        strbuf_addf(&sb, "\t%.*s = %s",
2382                    length, key + store.baselen + 1, quote);
2383
2384        for (i = 0; value[i]; i++)
2385                switch (value[i]) {
2386                case '\n':
2387                        strbuf_addstr(&sb, "\\n");
2388                        break;
2389                case '\t':
2390                        strbuf_addstr(&sb, "\\t");
2391                        break;
2392                case '"':
2393                case '\\':
2394                        strbuf_addch(&sb, '\\');
2395                        /* fallthrough */
2396                default:
2397                        strbuf_addch(&sb, value[i]);
2398                        break;
2399                }
2400        strbuf_addf(&sb, "%s\n", quote);
2401
2402        ret = write_in_full(fd, sb.buf, sb.len);
2403        strbuf_release(&sb);
2404
2405        return ret;
2406}
2407
2408static ssize_t find_beginning_of_line(const char *contents, size_t size,
2409        size_t offset_, int *found_bracket)
2410{
2411        size_t equal_offset = size, bracket_offset = size;
2412        ssize_t offset;
2413
2414contline:
2415        for (offset = offset_-2; offset > 0
2416                        && contents[offset] != '\n'; offset--)
2417                switch (contents[offset]) {
2418                        case '=': equal_offset = offset; break;
2419                        case ']': bracket_offset = offset; break;
2420                }
2421        if (offset > 0 && contents[offset-1] == '\\') {
2422                offset_ = offset;
2423                goto contline;
2424        }
2425        if (bracket_offset < equal_offset) {
2426                *found_bracket = 1;
2427                offset = bracket_offset+1;
2428        } else
2429                offset++;
2430
2431        return offset;
2432}
2433
2434int git_config_set_in_file_gently(const char *config_filename,
2435                                  const char *key, const char *value)
2436{
2437        return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2438}
2439
2440void git_config_set_in_file(const char *config_filename,
2441                            const char *key, const char *value)
2442{
2443        git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2444}
2445
2446int git_config_set_gently(const char *key, const char *value)
2447{
2448        return git_config_set_multivar_gently(key, value, NULL, 0);
2449}
2450
2451void git_config_set(const char *key, const char *value)
2452{
2453        git_config_set_multivar(key, value, NULL, 0);
2454}
2455
2456/*
2457 * If value==NULL, unset in (remove from) config,
2458 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2459 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2460 *     (only add a new one)
2461 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2462 *     else all matching key/values (regardless how many) are removed,
2463 *     before the new pair is written.
2464 *
2465 * Returns 0 on success.
2466 *
2467 * This function does this:
2468 *
2469 * - it locks the config file by creating ".git/config.lock"
2470 *
2471 * - it then parses the config using store_aux() as validator to find
2472 *   the position on the key/value pair to replace. If it is to be unset,
2473 *   it must be found exactly once.
2474 *
2475 * - the config file is mmap()ed and the part before the match (if any) is
2476 *   written to the lock file, then the changed part and the rest.
2477 *
2478 * - the config file is removed and the lock file rename()d to it.
2479 *
2480 */
2481int git_config_set_multivar_in_file_gently(const char *config_filename,
2482                                           const char *key, const char *value,
2483                                           const char *value_regex,
2484                                           int multi_replace)
2485{
2486        int fd = -1, in_fd = -1;
2487        int ret;
2488        struct lock_file lock = LOCK_INIT;
2489        char *filename_buf = NULL;
2490        char *contents = NULL;
2491        size_t contents_sz;
2492
2493        /* parse-key returns negative; flip the sign to feed exit(3) */
2494        ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2495        if (ret)
2496                goto out_free;
2497
2498        store.multi_replace = multi_replace;
2499
2500        if (!config_filename)
2501                config_filename = filename_buf = git_pathdup("config");
2502
2503        /*
2504         * The lock serves a purpose in addition to locking: the new
2505         * contents of .git/config will be written into it.
2506         */
2507        fd = hold_lock_file_for_update(&lock, config_filename, 0);
2508        if (fd < 0) {
2509                error_errno("could not lock config file %s", config_filename);
2510                free(store.key);
2511                ret = CONFIG_NO_LOCK;
2512                goto out_free;
2513        }
2514
2515        /*
2516         * If .git/config does not exist yet, write a minimal version.
2517         */
2518        in_fd = open(config_filename, O_RDONLY);
2519        if ( in_fd < 0 ) {
2520                free(store.key);
2521
2522                if ( ENOENT != errno ) {
2523                        error_errno("opening %s", config_filename);
2524                        ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2525                        goto out_free;
2526                }
2527                /* if nothing to unset, error out */
2528                if (value == NULL) {
2529                        ret = CONFIG_NOTHING_SET;
2530                        goto out_free;
2531                }
2532
2533                store.key = (char *)key;
2534                if (write_section(fd, key) < 0 ||
2535                    write_pair(fd, key, value) < 0)
2536                        goto write_err_out;
2537        } else {
2538                struct stat st;
2539                size_t copy_begin, copy_end;
2540                int i, new_line = 0;
2541
2542                if (value_regex == NULL)
2543                        store.value_regex = NULL;
2544                else if (value_regex == CONFIG_REGEX_NONE)
2545                        store.value_regex = CONFIG_REGEX_NONE;
2546                else {
2547                        if (value_regex[0] == '!') {
2548                                store.do_not_match = 1;
2549                                value_regex++;
2550                        } else
2551                                store.do_not_match = 0;
2552
2553                        store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2554                        if (regcomp(store.value_regex, value_regex,
2555                                        REG_EXTENDED)) {
2556                                error("invalid pattern: %s", value_regex);
2557                                free(store.value_regex);
2558                                ret = CONFIG_INVALID_PATTERN;
2559                                goto out_free;
2560                        }
2561                }
2562
2563                ALLOC_GROW(store.offset, 1, store.offset_alloc);
2564                store.offset[0] = 0;
2565                store.state = START;
2566                store.seen = 0;
2567
2568                /*
2569                 * After this, store.offset will contain the *end* offset
2570                 * of the last match, or remain at 0 if no match was found.
2571                 * As a side effect, we make sure to transform only a valid
2572                 * existing config file.
2573                 */
2574                if (git_config_from_file(store_aux, config_filename, NULL)) {
2575                        error("invalid config file %s", config_filename);
2576                        free(store.key);
2577                        if (store.value_regex != NULL &&
2578                            store.value_regex != CONFIG_REGEX_NONE) {
2579                                regfree(store.value_regex);
2580                                free(store.value_regex);
2581                        }
2582                        ret = CONFIG_INVALID_FILE;
2583                        goto out_free;
2584                }
2585
2586                free(store.key);
2587                if (store.value_regex != NULL &&
2588                    store.value_regex != CONFIG_REGEX_NONE) {
2589                        regfree(store.value_regex);
2590                        free(store.value_regex);
2591                }
2592
2593                /* if nothing to unset, or too many matches, error out */
2594                if ((store.seen == 0 && value == NULL) ||
2595                                (store.seen > 1 && multi_replace == 0)) {
2596                        ret = CONFIG_NOTHING_SET;
2597                        goto out_free;
2598                }
2599
2600                if (fstat(in_fd, &st) == -1) {
2601                        error_errno(_("fstat on %s failed"), config_filename);
2602                        ret = CONFIG_INVALID_FILE;
2603                        goto out_free;
2604                }
2605
2606                contents_sz = xsize_t(st.st_size);
2607                contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2608                                        MAP_PRIVATE, in_fd, 0);
2609                if (contents == MAP_FAILED) {
2610                        if (errno == ENODEV && S_ISDIR(st.st_mode))
2611                                errno = EISDIR;
2612                        error_errno("unable to mmap '%s'", config_filename);
2613                        ret = CONFIG_INVALID_FILE;
2614                        contents = NULL;
2615                        goto out_free;
2616                }
2617                close(in_fd);
2618                in_fd = -1;
2619
2620                if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
2621                        error_errno("chmod on %s failed", get_lock_file_path(&lock));
2622                        ret = CONFIG_NO_WRITE;
2623                        goto out_free;
2624                }
2625
2626                if (store.seen == 0)
2627                        store.seen = 1;
2628
2629                for (i = 0, copy_begin = 0; i < store.seen; i++) {
2630                        if (store.offset[i] == 0) {
2631                                store.offset[i] = copy_end = contents_sz;
2632                        } else if (store.state != KEY_SEEN) {
2633                                copy_end = store.offset[i];
2634                        } else
2635                                copy_end = find_beginning_of_line(
2636                                        contents, contents_sz,
2637                                        store.offset[i]-2, &new_line);
2638
2639                        if (copy_end > 0 && contents[copy_end-1] != '\n')
2640                                new_line = 1;
2641
2642                        /* write the first part of the config */
2643                        if (copy_end > copy_begin) {
2644                                if (write_in_full(fd, contents + copy_begin,
2645                                                  copy_end - copy_begin) < 0)
2646                                        goto write_err_out;
2647                                if (new_line &&
2648                                    write_str_in_full(fd, "\n") < 0)
2649                                        goto write_err_out;
2650                        }
2651                        copy_begin = store.offset[i];
2652                }
2653
2654                /* write the pair (value == NULL means unset) */
2655                if (value != NULL) {
2656                        if (store.state == START) {
2657                                if (write_section(fd, key) < 0)
2658                                        goto write_err_out;
2659                        }
2660                        if (write_pair(fd, key, value) < 0)
2661                                goto write_err_out;
2662                }
2663
2664                /* write the rest of the config */
2665                if (copy_begin < contents_sz)
2666                        if (write_in_full(fd, contents + copy_begin,
2667                                          contents_sz - copy_begin) < 0)
2668                                goto write_err_out;
2669
2670                munmap(contents, contents_sz);
2671                contents = NULL;
2672        }
2673
2674        if (commit_lock_file(&lock) < 0) {
2675                error_errno("could not write config file %s", config_filename);
2676                ret = CONFIG_NO_WRITE;
2677                goto out_free;
2678        }
2679
2680        ret = 0;
2681
2682        /* Invalidate the config cache */
2683        git_config_clear();
2684
2685out_free:
2686        rollback_lock_file(&lock);
2687        free(filename_buf);
2688        if (contents)
2689                munmap(contents, contents_sz);
2690        if (in_fd >= 0)
2691                close(in_fd);
2692        return ret;
2693
2694write_err_out:
2695        ret = write_error(get_lock_file_path(&lock));
2696        goto out_free;
2697
2698}
2699
2700void git_config_set_multivar_in_file(const char *config_filename,
2701                                     const char *key, const char *value,
2702                                     const char *value_regex, int multi_replace)
2703{
2704        if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2705                                                    value_regex, multi_replace))
2706                return;
2707        if (value)
2708                die(_("could not set '%s' to '%s'"), key, value);
2709        else
2710                die(_("could not unset '%s'"), key);
2711}
2712
2713int git_config_set_multivar_gently(const char *key, const char *value,
2714                                   const char *value_regex, int multi_replace)
2715{
2716        return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2717                                                      multi_replace);
2718}
2719
2720void git_config_set_multivar(const char *key, const char *value,
2721                             const char *value_regex, int multi_replace)
2722{
2723        git_config_set_multivar_in_file(NULL, key, value, value_regex,
2724                                        multi_replace);
2725}
2726
2727static int section_name_match (const char *buf, const char *name)
2728{
2729        int i = 0, j = 0, dot = 0;
2730        if (buf[i] != '[')
2731                return 0;
2732        for (i = 1; buf[i] && buf[i] != ']'; i++) {
2733                if (!dot && isspace(buf[i])) {
2734                        dot = 1;
2735                        if (name[j++] != '.')
2736                                break;
2737                        for (i++; isspace(buf[i]); i++)
2738                                ; /* do nothing */
2739                        if (buf[i] != '"')
2740                                break;
2741                        continue;
2742                }
2743                if (buf[i] == '\\' && dot)
2744                        i++;
2745                else if (buf[i] == '"' && dot) {
2746                        for (i++; isspace(buf[i]); i++)
2747                                ; /* do_nothing */
2748                        break;
2749                }
2750                if (buf[i] != name[j++])
2751                        break;
2752        }
2753        if (buf[i] == ']' && name[j] == 0) {
2754                /*
2755                 * We match, now just find the right length offset by
2756                 * gobbling up any whitespace after it, as well
2757                 */
2758                i++;
2759                for (; buf[i] && isspace(buf[i]); i++)
2760                        ; /* do nothing */
2761                return i;
2762        }
2763        return 0;
2764}
2765
2766static int section_name_is_ok(const char *name)
2767{
2768        /* Empty section names are bogus. */
2769        if (!*name)
2770                return 0;
2771
2772        /*
2773         * Before a dot, we must be alphanumeric or dash. After the first dot,
2774         * anything goes, so we can stop checking.
2775         */
2776        for (; *name && *name != '.'; name++)
2777                if (*name != '-' && !isalnum(*name))
2778                        return 0;
2779        return 1;
2780}
2781
2782/* if new_name == NULL, the section is removed instead */
2783static int git_config_copy_or_rename_section_in_file(const char *config_filename,
2784                                      const char *old_name, const char *new_name, int copy)
2785{
2786        int ret = 0, remove = 0;
2787        char *filename_buf = NULL;
2788        struct lock_file lock = LOCK_INIT;
2789        int out_fd;
2790        char buf[1024];
2791        FILE *config_file = NULL;
2792        struct stat st;
2793        struct strbuf copystr = STRBUF_INIT;
2794
2795        if (new_name && !section_name_is_ok(new_name)) {
2796                ret = error("invalid section name: %s", new_name);
2797                goto out_no_rollback;
2798        }
2799
2800        if (!config_filename)
2801                config_filename = filename_buf = git_pathdup("config");
2802
2803        out_fd = hold_lock_file_for_update(&lock, config_filename, 0);
2804        if (out_fd < 0) {
2805                ret = error("could not lock config file %s", config_filename);
2806                goto out;
2807        }
2808
2809        if (!(config_file = fopen(config_filename, "rb"))) {
2810                ret = warn_on_fopen_errors(config_filename);
2811                if (ret)
2812                        goto out;
2813                /* no config file means nothing to rename, no error */
2814                goto commit_and_out;
2815        }
2816
2817        if (fstat(fileno(config_file), &st) == -1) {
2818                ret = error_errno(_("fstat on %s failed"), config_filename);
2819                goto out;
2820        }
2821
2822        if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
2823                ret = error_errno("chmod on %s failed",
2824                                  get_lock_file_path(&lock));
2825                goto out;
2826        }
2827
2828        while (fgets(buf, sizeof(buf), config_file)) {
2829                int i;
2830                int length;
2831                int is_section = 0;
2832                char *output = buf;
2833                for (i = 0; buf[i] && isspace(buf[i]); i++)
2834                        ; /* do nothing */
2835                if (buf[i] == '[') {
2836                        /* it's a section */
2837                        int offset;
2838                        is_section = 1;
2839
2840                        /*
2841                         * When encountering a new section under -c we
2842                         * need to flush out any section we're already
2843                         * coping and begin anew. There might be
2844                         * multiple [branch "$name"] sections.
2845                         */
2846                        if (copystr.len > 0) {
2847                                if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
2848                                        ret = write_error(get_lock_file_path(&lock));
2849                                        goto out;
2850                                }
2851                                strbuf_reset(&copystr);
2852                        }
2853
2854                        offset = section_name_match(&buf[i], old_name);
2855                        if (offset > 0) {
2856                                ret++;
2857                                if (new_name == NULL) {
2858                                        remove = 1;
2859                                        continue;
2860                                }
2861                                store.baselen = strlen(new_name);
2862                                if (!copy) {
2863                                        if (write_section(out_fd, new_name) < 0) {
2864                                                ret = write_error(get_lock_file_path(&lock));
2865                                                goto out;
2866                                        }
2867                                        /*
2868                                         * We wrote out the new section, with
2869                                         * a newline, now skip the old
2870                                         * section's length
2871                                         */
2872                                        output += offset + i;
2873                                        if (strlen(output) > 0) {
2874                                                /*
2875                                                 * More content means there's
2876                                                 * a declaration to put on the
2877                                                 * next line; indent with a
2878                                                 * tab
2879                                                 */
2880                                                output -= 1;
2881                                                output[0] = '\t';
2882                                        }
2883                                } else {
2884                                        copystr = store_create_section(new_name);
2885                                }
2886                        }
2887                        remove = 0;
2888                }
2889                if (remove)
2890                        continue;
2891                length = strlen(output);
2892
2893                if (!is_section && copystr.len > 0) {
2894                        strbuf_add(&copystr, output, length);
2895                }
2896
2897                if (write_in_full(out_fd, output, length) < 0) {
2898                        ret = write_error(get_lock_file_path(&lock));
2899                        goto out;
2900                }
2901        }
2902
2903        /*
2904         * Copy a trailing section at the end of the config, won't be
2905         * flushed by the usual "flush because we have a new section
2906         * logic in the loop above.
2907         */
2908        if (copystr.len > 0) {
2909                if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
2910                        ret = write_error(get_lock_file_path(&lock));
2911                        goto out;
2912                }
2913                strbuf_reset(&copystr);
2914        }
2915
2916        fclose(config_file);
2917        config_file = NULL;
2918commit_and_out:
2919        if (commit_lock_file(&lock) < 0)
2920                ret = error_errno("could not write config file %s",
2921                                  config_filename);
2922out:
2923        if (config_file)
2924                fclose(config_file);
2925        rollback_lock_file(&lock);
2926out_no_rollback:
2927        free(filename_buf);
2928        return ret;
2929}
2930
2931int git_config_rename_section_in_file(const char *config_filename,
2932                                      const char *old_name, const char *new_name)
2933{
2934        return git_config_copy_or_rename_section_in_file(config_filename,
2935                                         old_name, new_name, 0);
2936}
2937
2938int git_config_rename_section(const char *old_name, const char *new_name)
2939{
2940        return git_config_rename_section_in_file(NULL, old_name, new_name);
2941}
2942
2943int git_config_copy_section_in_file(const char *config_filename,
2944                                      const char *old_name, const char *new_name)
2945{
2946        return git_config_copy_or_rename_section_in_file(config_filename,
2947                                         old_name, new_name, 1);
2948}
2949
2950int git_config_copy_section(const char *old_name, const char *new_name)
2951{
2952        return git_config_copy_section_in_file(NULL, old_name, new_name);
2953}
2954
2955/*
2956 * Call this to report error for your variable that should not
2957 * get a boolean value (i.e. "[my] var" means "true").
2958 */
2959#undef config_error_nonbool
2960int config_error_nonbool(const char *var)
2961{
2962        return error("missing value for '%s'", var);
2963}
2964
2965int parse_config_key(const char *var,
2966                     const char *section,
2967                     const char **subsection, int *subsection_len,
2968                     const char **key)
2969{
2970        const char *dot;
2971
2972        /* Does it start with "section." ? */
2973        if (!skip_prefix(var, section, &var) || *var != '.')
2974                return -1;
2975
2976        /*
2977         * Find the key; we don't know yet if we have a subsection, but we must
2978         * parse backwards from the end, since the subsection may have dots in
2979         * it, too.
2980         */
2981        dot = strrchr(var, '.');
2982        *key = dot + 1;
2983
2984        /* Did we have a subsection at all? */
2985        if (dot == var) {
2986                if (subsection) {
2987                        *subsection = NULL;
2988                        *subsection_len = 0;
2989                }
2990        }
2991        else {
2992                if (!subsection)
2993                        return -1;
2994                *subsection = var + 1;
2995                *subsection_len = dot - *subsection;
2996        }
2997
2998        return 0;
2999}
3000
3001const char *current_config_origin_type(void)
3002{
3003        int type;
3004        if (current_config_kvi)
3005                type = current_config_kvi->origin_type;
3006        else if(cf)
3007                type = cf->origin_type;
3008        else
3009                die("BUG: current_config_origin_type called outside config callback");
3010
3011        switch (type) {
3012        case CONFIG_ORIGIN_BLOB:
3013                return "blob";
3014        case CONFIG_ORIGIN_FILE:
3015                return "file";
3016        case CONFIG_ORIGIN_STDIN:
3017                return "standard input";
3018        case CONFIG_ORIGIN_SUBMODULE_BLOB:
3019                return "submodule-blob";
3020        case CONFIG_ORIGIN_CMDLINE:
3021                return "command line";
3022        default:
3023                die("BUG: unknown config origin type");
3024        }
3025}
3026
3027const char *current_config_name(void)
3028{
3029        const char *name;
3030        if (current_config_kvi)
3031                name = current_config_kvi->filename;
3032        else if (cf)
3033                name = cf->name;
3034        else
3035                die("BUG: current_config_name called outside config callback");
3036        return name ? name : "";
3037}
3038
3039enum config_scope current_config_scope(void)
3040{
3041        if (current_config_kvi)
3042                return current_config_kvi->scope;
3043        else
3044                return current_parsing_scope;
3045}