Andrew's git / gitweb.git / config.c
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config.con commit Introduce is_bare_repository() and core.bare configuration variable (7d1864c)
   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
  10#define MAXNAME (256)
  11
  12static FILE *config_file;
  13static const char *config_file_name;
  14static int config_linenr;
  15static int get_next_char(void)
  16{
  17        int c;
  18        FILE *f;
  19
  20        c = '\n';
  21        if ((f = config_file) != NULL) {
  22                c = fgetc(f);
  23                if (c == '\r') {
  24                        /* DOS like systems */
  25                        c = fgetc(f);
  26                        if (c != '\n') {
  27                                ungetc(c, f);
  28                                c = '\r';
  29                        }
  30                }
  31                if (c == '\n')
  32                        config_linenr++;
  33                if (c == EOF) {
  34                        config_file = NULL;
  35                        c = '\n';
  36                }
  37        }
  38        return c;
  39}
  40
  41static char *parse_value(void)
  42{
  43        static char value[1024];
  44        int quote = 0, comment = 0, len = 0, space = 0;
  45
  46        for (;;) {
  47                int c = get_next_char();
  48                if (len >= sizeof(value))
  49                        return NULL;
  50                if (c == '\n') {
  51                        if (quote)
  52                                return NULL;
  53                        value[len] = 0;
  54                        return value;
  55                }
  56                if (comment)
  57                        continue;
  58                if (isspace(c) && !quote) {
  59                        space = 1;
  60                        continue;
  61                }
  62                if (!quote) {
  63                        if (c == ';' || c == '#') {
  64                                comment = 1;
  65                                continue;
  66                        }
  67                }
  68                if (space) {
  69                        if (len)
  70                                value[len++] = ' ';
  71                        space = 0;
  72                }
  73                if (c == '\\') {
  74                        c = get_next_char();
  75                        switch (c) {
  76                        case '\n':
  77                                continue;
  78                        case 't':
  79                                c = '\t';
  80                                break;
  81                        case 'b':
  82                                c = '\b';
  83                                break;
  84                        case 'n':
  85                                c = '\n';
  86                                break;
  87                        /* Some characters escape as themselves */
  88                        case '\\': case '"':
  89                                break;
  90                        /* Reject unknown escape sequences */
  91                        default:
  92                                return NULL;
  93                        }
  94                        value[len++] = c;
  95                        continue;
  96                }
  97                if (c == '"') {
  98                        quote = 1-quote;
  99                        continue;
 100                }
 101                value[len++] = c;
 102        }
 103}
 104
 105static inline int iskeychar(int c)
 106{
 107        return isalnum(c) || c == '-';
 108}
 109
 110static int get_value(config_fn_t fn, char *name, unsigned int len)
 111{
 112        int c;
 113        char *value;
 114
 115        /* Get the full name */
 116        for (;;) {
 117                c = get_next_char();
 118                if (c == EOF)
 119                        break;
 120                if (!iskeychar(c))
 121                        break;
 122                name[len++] = tolower(c);
 123                if (len >= MAXNAME)
 124                        return -1;
 125        }
 126        name[len] = 0;
 127        while (c == ' ' || c == '\t')
 128                c = get_next_char();
 129
 130        value = NULL;
 131        if (c != '\n') {
 132                if (c != '=')
 133                        return -1;
 134                value = parse_value();
 135                if (!value)
 136                        return -1;
 137        }
 138        return fn(name, value);
 139}
 140
 141static int get_extended_base_var(char *name, int baselen, int c)
 142{
 143        do {
 144                if (c == '\n')
 145                        return -1;
 146                c = get_next_char();
 147        } while (isspace(c));
 148
 149        /* We require the format to be '[base "extension"]' */
 150        if (c != '"')
 151                return -1;
 152        name[baselen++] = '.';
 153
 154        for (;;) {
 155                int c = get_next_char();
 156                if (c == '\n')
 157                        return -1;
 158                if (c == '"')
 159                        break;
 160                if (c == '\\') {
 161                        c = get_next_char();
 162                        if (c == '\n')
 163                                return -1;
 164                }
 165                name[baselen++] = c;
 166                if (baselen > MAXNAME / 2)
 167                        return -1;
 168        }
 169
 170        /* Final ']' */
 171        if (get_next_char() != ']')
 172                return -1;
 173        return baselen;
 174}
 175
 176static int get_base_var(char *name)
 177{
 178        int baselen = 0;
 179
 180        for (;;) {
 181                int c = get_next_char();
 182                if (c == EOF)
 183                        return -1;
 184                if (c == ']')
 185                        return baselen;
 186                if (isspace(c))
 187                        return get_extended_base_var(name, baselen, c);
 188                if (!iskeychar(c) && c != '.')
 189                        return -1;
 190                if (baselen > MAXNAME / 2)
 191                        return -1;
 192                name[baselen++] = tolower(c);
 193        }
 194}
 195
 196static int git_parse_file(config_fn_t fn)
 197{
 198        int comment = 0;
 199        int baselen = 0;
 200        static char var[MAXNAME];
 201
 202        for (;;) {
 203                int c = get_next_char();
 204                if (c == '\n') {
 205                        /* EOF? */
 206                        if (!config_file)
 207                                return 0;
 208                        comment = 0;
 209                        continue;
 210                }
 211                if (comment || isspace(c))
 212                        continue;
 213                if (c == '#' || c == ';') {
 214                        comment = 1;
 215                        continue;
 216                }
 217                if (c == '[') {
 218                        baselen = get_base_var(var);
 219                        if (baselen <= 0)
 220                                break;
 221                        var[baselen++] = '.';
 222                        var[baselen] = 0;
 223                        continue;
 224                }
 225                if (!isalpha(c))
 226                        break;
 227                var[baselen] = tolower(c);
 228                if (get_value(fn, var, baselen+1) < 0)
 229                        break;
 230        }
 231        die("bad config file line %d in %s", config_linenr, config_file_name);
 232}
 233
 234int git_config_int(const char *name, const char *value)
 235{
 236        if (value && *value) {
 237                char *end;
 238                int val = strtol(value, &end, 0);
 239                if (!*end)
 240                        return val;
 241                if (!strcasecmp(end, "k"))
 242                        return val * 1024;
 243                if (!strcasecmp(end, "m"))
 244                        return val * 1024 * 1024;
 245                if (!strcasecmp(end, "g"))
 246                        return val * 1024 * 1024 * 1024;
 247        }
 248        die("bad config value for '%s' in %s", name, config_file_name);
 249}
 250
 251int git_config_bool(const char *name, const char *value)
 252{
 253        if (!value)
 254                return 1;
 255        if (!*value)
 256                return 0;
 257        if (!strcasecmp(value, "true") || !strcasecmp(value, "yes"))
 258                return 1;
 259        if (!strcasecmp(value, "false") || !strcasecmp(value, "no"))
 260                return 0;
 261        return git_config_int(name, value) != 0;
 262}
 263
 264int git_default_config(const char *var, const char *value)
 265{
 266        /* This needs a better name */
 267        if (!strcmp(var, "core.filemode")) {
 268                trust_executable_bit = git_config_bool(var, value);
 269                return 0;
 270        }
 271
 272        if (!strcmp(var, "core.bare")) {
 273                is_bare_repository_cfg = git_config_bool(var, value);
 274                return 0;
 275        }
 276
 277        if (!strcmp(var, "core.ignorestat")) {
 278                assume_unchanged = git_config_bool(var, value);
 279                return 0;
 280        }
 281
 282        if (!strcmp(var, "core.prefersymlinkrefs")) {
 283                prefer_symlink_refs = git_config_bool(var, value);
 284                return 0;
 285        }
 286
 287        if (!strcmp(var, "core.logallrefupdates")) {
 288                log_all_ref_updates = git_config_bool(var, value);
 289                return 0;
 290        }
 291
 292        if (!strcmp(var, "core.warnambiguousrefs")) {
 293                warn_ambiguous_refs = git_config_bool(var, value);
 294                return 0;
 295        }
 296
 297        if (!strcmp(var, "core.legacyheaders")) {
 298                use_legacy_headers = git_config_bool(var, value);
 299                return 0;
 300        }
 301
 302        if (!strcmp(var, "core.compression")) {
 303                int level = git_config_int(var, value);
 304                if (level == -1)
 305                        level = Z_DEFAULT_COMPRESSION;
 306                else if (level < 0 || level > Z_BEST_COMPRESSION)
 307                        die("bad zlib compression level %d", level);
 308                zlib_compression_level = level;
 309                return 0;
 310        }
 311
 312        if (!strcmp(var, "core.packedgitwindowsize")) {
 313                int pgsz = getpagesize();
 314                packed_git_window_size = git_config_int(var, value);
 315                packed_git_window_size /= pgsz;
 316                if (packed_git_window_size < 2)
 317                        packed_git_window_size = 2;
 318                packed_git_window_size *= pgsz;
 319                return 0;
 320        }
 321
 322        if (!strcmp(var, "core.packedgitlimit")) {
 323                packed_git_limit = git_config_int(var, value);
 324                return 0;
 325        }
 326
 327        if (!strcmp(var, "user.name")) {
 328                strlcpy(git_default_name, value, sizeof(git_default_name));
 329                return 0;
 330        }
 331
 332        if (!strcmp(var, "user.email")) {
 333                strlcpy(git_default_email, value, sizeof(git_default_email));
 334                return 0;
 335        }
 336
 337        if (!strcmp(var, "i18n.commitencoding")) {
 338                git_commit_encoding = strdup(value);
 339                return 0;
 340        }
 341
 342        if (!strcmp(var, "i18n.logoutputencoding")) {
 343                git_log_output_encoding = strdup(value);
 344                return 0;
 345        }
 346
 347
 348        if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
 349                pager_use_color = git_config_bool(var,value);
 350                return 0;
 351        }
 352
 353        /* Add other config variables here and to Documentation/config.txt. */
 354        return 0;
 355}
 356
 357int git_config_from_file(config_fn_t fn, const char *filename)
 358{
 359        int ret;
 360        FILE *f = fopen(filename, "r");
 361
 362        ret = -1;
 363        if (f) {
 364                config_file = f;
 365                config_file_name = filename;
 366                config_linenr = 1;
 367                ret = git_parse_file(fn);
 368                fclose(f);
 369                config_file_name = NULL;
 370        }
 371        return ret;
 372}
 373
 374int git_config(config_fn_t fn)
 375{
 376        int ret = 0;
 377        char *repo_config = NULL;
 378        const char *home = NULL, *filename;
 379
 380        /* $GIT_CONFIG makes git read _only_ the given config file,
 381         * $GIT_CONFIG_LOCAL will make it process it in addition to the
 382         * global config file, the same way it would the per-repository
 383         * config file otherwise. */
 384        filename = getenv(CONFIG_ENVIRONMENT);
 385        if (!filename) {
 386                home = getenv("HOME");
 387                filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
 388                if (!filename)
 389                        filename = repo_config = xstrdup(git_path("config"));
 390        }
 391
 392        if (home) {
 393                char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
 394                if (!access(user_config, R_OK))
 395                        ret = git_config_from_file(fn, user_config);
 396                free(user_config);
 397        }
 398
 399        ret += git_config_from_file(fn, filename);
 400        free(repo_config);
 401        return ret;
 402}
 403
 404/*
 405 * Find all the stuff for git_config_set() below.
 406 */
 407
 408#define MAX_MATCHES 512
 409
 410static struct {
 411        int baselen;
 412        char* key;
 413        int do_not_match;
 414        regex_t* value_regex;
 415        int multi_replace;
 416        off_t offset[MAX_MATCHES];
 417        enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
 418        int seen;
 419} store;
 420
 421static int matches(const char* key, const char* value)
 422{
 423        return !strcmp(key, store.key) &&
 424                (store.value_regex == NULL ||
 425                 (store.do_not_match ^
 426                  !regexec(store.value_regex, value, 0, NULL, 0)));
 427}
 428
 429static int store_aux(const char* key, const char* value)
 430{
 431        switch (store.state) {
 432        case KEY_SEEN:
 433                if (matches(key, value)) {
 434                        if (store.seen == 1 && store.multi_replace == 0) {
 435                                fprintf(stderr,
 436                                        "Warning: %s has multiple values\n",
 437                                        key);
 438                        } else if (store.seen >= MAX_MATCHES) {
 439                                fprintf(stderr, "Too many matches\n");
 440                                return 1;
 441                        }
 442
 443                        store.offset[store.seen] = ftell(config_file);
 444                        store.seen++;
 445                }
 446                break;
 447        case SECTION_SEEN:
 448                if (strncmp(key, store.key, store.baselen+1)) {
 449                        store.state = SECTION_END_SEEN;
 450                        break;
 451                } else
 452                        /* do not increment matches: this is no match */
 453                        store.offset[store.seen] = ftell(config_file);
 454                /* fallthru */
 455        case SECTION_END_SEEN:
 456        case START:
 457                if (matches(key, value)) {
 458                        store.offset[store.seen] = ftell(config_file);
 459                        store.state = KEY_SEEN;
 460                        store.seen++;
 461                } else {
 462                        if (strrchr(key, '.') - key == store.baselen &&
 463                              !strncmp(key, store.key, store.baselen)) {
 464                                        store.state = SECTION_SEEN;
 465                                        store.offset[store.seen] = ftell(config_file);
 466                        }
 467                }
 468        }
 469        return 0;
 470}
 471
 472static void store_write_section(int fd, const char* key)
 473{
 474        const char *dot = strchr(key, '.');
 475        int len1 = store.baselen, len2 = -1;
 476
 477        dot = strchr(key, '.');
 478        if (dot) {
 479                int dotlen = dot - key;
 480                if (dotlen < len1) {
 481                        len2 = len1 - dotlen - 1;
 482                        len1 = dotlen;
 483                }
 484        }
 485
 486        write(fd, "[", 1);
 487        write(fd, key, len1);
 488        if (len2 >= 0) {
 489                write(fd, " \"", 2);
 490                while (--len2 >= 0) {
 491                        unsigned char c = *++dot;
 492                        if (c == '"')
 493                                write(fd, "\\", 1);
 494                        write(fd, &c, 1);
 495                }
 496                write(fd, "\"", 1);
 497        }
 498        write(fd, "]\n", 2);
 499}
 500
 501static void store_write_pair(int fd, const char* key, const char* value)
 502{
 503        int i;
 504
 505        write(fd, "\t", 1);
 506        write(fd, key+store.baselen+1,
 507                strlen(key+store.baselen+1));
 508        write(fd, " = ", 3);
 509        for (i = 0; value[i]; i++)
 510                switch (value[i]) {
 511                case '\n': write(fd, "\\n", 2); break;
 512                case '\t': write(fd, "\\t", 2); break;
 513                case '"': case '\\': write(fd, "\\", 1);
 514                default: write(fd, value+i, 1);
 515        }
 516        write(fd, "\n", 1);
 517}
 518
 519static int find_beginning_of_line(const char* contents, int size,
 520        int offset_, int* found_bracket)
 521{
 522        int equal_offset = size, bracket_offset = size;
 523        int offset;
 524
 525        for (offset = offset_-2; offset > 0 
 526                        && contents[offset] != '\n'; offset--)
 527                switch (contents[offset]) {
 528                        case '=': equal_offset = offset; break;
 529                        case ']': bracket_offset = offset; break;
 530                }
 531        if (bracket_offset < equal_offset) {
 532                *found_bracket = 1;
 533                offset = bracket_offset+1;
 534        } else
 535                offset++;
 536
 537        return offset;
 538}
 539
 540int git_config_set(const char* key, const char* value)
 541{
 542        return git_config_set_multivar(key, value, NULL, 0);
 543}
 544
 545/*
 546 * If value==NULL, unset in (remove from) config,
 547 * if value_regex!=NULL, disregard key/value pairs where value does not match.
 548 * if multi_replace==0, nothing, or only one matching key/value is replaced,
 549 *     else all matching key/values (regardless how many) are removed,
 550 *     before the new pair is written.
 551 *
 552 * Returns 0 on success.
 553 *
 554 * This function does this:
 555 *
 556 * - it locks the config file by creating ".git/config.lock"
 557 *
 558 * - it then parses the config using store_aux() as validator to find
 559 *   the position on the key/value pair to replace. If it is to be unset,
 560 *   it must be found exactly once.
 561 *
 562 * - the config file is mmap()ed and the part before the match (if any) is
 563 *   written to the lock file, then the changed part and the rest.
 564 *
 565 * - the config file is removed and the lock file rename()d to it.
 566 *
 567 */
 568int git_config_set_multivar(const char* key, const char* value,
 569        const char* value_regex, int multi_replace)
 570{
 571        int i, dot;
 572        int fd = -1, in_fd;
 573        int ret;
 574        char* config_filename;
 575        char* lock_file;
 576        const char* last_dot = strrchr(key, '.');
 577
 578        config_filename = getenv(CONFIG_ENVIRONMENT);
 579        if (!config_filename) {
 580                config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
 581                if (!config_filename)
 582                        config_filename  = git_path("config");
 583        }
 584        config_filename = xstrdup(config_filename);
 585        lock_file = xstrdup(mkpath("%s.lock", config_filename));
 586
 587        /*
 588         * Since "key" actually contains the section name and the real
 589         * key name separated by a dot, we have to know where the dot is.
 590         */
 591
 592        if (last_dot == NULL) {
 593                fprintf(stderr, "key does not contain a section: %s\n", key);
 594                ret = 2;
 595                goto out_free;
 596        }
 597        store.baselen = last_dot - key;
 598
 599        store.multi_replace = multi_replace;
 600
 601        /*
 602         * Validate the key and while at it, lower case it for matching.
 603         */
 604        store.key = xmalloc(strlen(key) + 1);
 605        dot = 0;
 606        for (i = 0; key[i]; i++) {
 607                unsigned char c = key[i];
 608                if (c == '.')
 609                        dot = 1;
 610                /* Leave the extended basename untouched.. */
 611                if (!dot || i > store.baselen) {
 612                        if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
 613                                fprintf(stderr, "invalid key: %s\n", key);
 614                                free(store.key);
 615                                ret = 1;
 616                                goto out_free;
 617                        }
 618                        c = tolower(c);
 619                }
 620                store.key[i] = c;
 621        }
 622        store.key[i] = 0;
 623
 624        /*
 625         * The lock_file serves a purpose in addition to locking: the new
 626         * contents of .git/config will be written into it.
 627         */
 628        fd = open(lock_file, O_WRONLY | O_CREAT | O_EXCL, 0666);
 629        if (fd < 0 || adjust_shared_perm(lock_file)) {
 630                fprintf(stderr, "could not lock config file\n");
 631                free(store.key);
 632                ret = -1;
 633                goto out_free;
 634        }
 635
 636        /*
 637         * If .git/config does not exist yet, write a minimal version.
 638         */
 639        in_fd = open(config_filename, O_RDONLY);
 640        if ( in_fd < 0 ) {
 641                free(store.key);
 642
 643                if ( ENOENT != errno ) {
 644                        error("opening %s: %s", config_filename,
 645                              strerror(errno));
 646                        ret = 3; /* same as "invalid config file" */
 647                        goto out_free;
 648                }
 649                /* if nothing to unset, error out */
 650                if (value == NULL) {
 651                        ret = 5;
 652                        goto out_free;
 653                }
 654
 655                store.key = (char*)key;
 656                store_write_section(fd, key);
 657                store_write_pair(fd, key, value);
 658        } else{
 659                struct stat st;
 660                char* contents;
 661                int i, copy_begin, copy_end, new_line = 0;
 662
 663                if (value_regex == NULL)
 664                        store.value_regex = NULL;
 665                else {
 666                        if (value_regex[0] == '!') {
 667                                store.do_not_match = 1;
 668                                value_regex++;
 669                        } else
 670                                store.do_not_match = 0;
 671
 672                        store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
 673                        if (regcomp(store.value_regex, value_regex,
 674                                        REG_EXTENDED)) {
 675                                fprintf(stderr, "Invalid pattern: %s\n",
 676                                        value_regex);
 677                                free(store.value_regex);
 678                                ret = 6;
 679                                goto out_free;
 680                        }
 681                }
 682
 683                store.offset[0] = 0;
 684                store.state = START;
 685                store.seen = 0;
 686
 687                /*
 688                 * After this, store.offset will contain the *end* offset
 689                 * of the last match, or remain at 0 if no match was found.
 690                 * As a side effect, we make sure to transform only a valid
 691                 * existing config file.
 692                 */
 693                if (git_config_from_file(store_aux, config_filename)) {
 694                        fprintf(stderr, "invalid config file\n");
 695                        free(store.key);
 696                        if (store.value_regex != NULL) {
 697                                regfree(store.value_regex);
 698                                free(store.value_regex);
 699                        }
 700                        ret = 3;
 701                        goto out_free;
 702                }
 703
 704                free(store.key);
 705                if (store.value_regex != NULL) {
 706                        regfree(store.value_regex);
 707                        free(store.value_regex);
 708                }
 709
 710                /* if nothing to unset, or too many matches, error out */
 711                if ((store.seen == 0 && value == NULL) ||
 712                                (store.seen > 1 && multi_replace == 0)) {
 713                        ret = 5;
 714                        goto out_free;
 715                }
 716
 717                fstat(in_fd, &st);
 718                contents = xmmap(NULL, st.st_size, PROT_READ,
 719                        MAP_PRIVATE, in_fd, 0);
 720                close(in_fd);
 721
 722                if (store.seen == 0)
 723                        store.seen = 1;
 724
 725                for (i = 0, copy_begin = 0; i < store.seen; i++) {
 726                        if (store.offset[i] == 0) {
 727                                store.offset[i] = copy_end = st.st_size;
 728                        } else if (store.state != KEY_SEEN) {
 729                                copy_end = store.offset[i];
 730                        } else
 731                                copy_end = find_beginning_of_line(
 732                                        contents, st.st_size,
 733                                        store.offset[i]-2, &new_line);
 734
 735                        /* write the first part of the config */
 736                        if (copy_end > copy_begin) {
 737                                write(fd, contents + copy_begin,
 738                                copy_end - copy_begin);
 739                                if (new_line)
 740                                        write(fd, "\n", 1);
 741                        }
 742                        copy_begin = store.offset[i];
 743                }
 744
 745                /* write the pair (value == NULL means unset) */
 746                if (value != NULL) {
 747                        if (store.state == START)
 748                                store_write_section(fd, key);
 749                        store_write_pair(fd, key, value);
 750                }
 751
 752                /* write the rest of the config */
 753                if (copy_begin < st.st_size)
 754                        write(fd, contents + copy_begin,
 755                                st.st_size - copy_begin);
 756
 757                munmap(contents, st.st_size);
 758                unlink(config_filename);
 759        }
 760
 761        if (rename(lock_file, config_filename) < 0) {
 762                fprintf(stderr, "Could not rename the lock file?\n");
 763                ret = 4;
 764                goto out_free;
 765        }
 766
 767        ret = 0;
 768
 769out_free:
 770        if (0 <= fd)
 771                close(fd);
 772        free(config_filename);
 773        if (lock_file) {
 774                unlink(lock_file);
 775                free(lock_file);
 776        }
 777        return ret;
 778}
 779
 780int git_config_rename_section(const char *old_name, const char *new_name)
 781{
 782        int ret = 0;
 783        char *config_filename;
 784        struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
 785        int out_fd;
 786        char buf[1024];
 787
 788        config_filename = getenv(CONFIG_ENVIRONMENT);
 789        if (!config_filename) {
 790                config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
 791                if (!config_filename)
 792                        config_filename  = git_path("config");
 793        }
 794        config_filename = xstrdup(config_filename);
 795        out_fd = hold_lock_file_for_update(lock, config_filename, 0);
 796        if (out_fd < 0) {
 797                ret = error("Could not lock config file!");
 798                goto out;
 799        }
 800
 801        if (!(config_file = fopen(config_filename, "rb"))) {
 802                ret = error("Could not open config file!");
 803                goto out;
 804        }
 805
 806        while (fgets(buf, sizeof(buf), config_file)) {
 807                int i;
 808                for (i = 0; buf[i] && isspace(buf[i]); i++)
 809                        ; /* do nothing */
 810                if (buf[i] == '[') {
 811                        /* it's a section */
 812                        int j = 0, dot = 0;
 813                        for (i++; buf[i] && buf[i] != ']'; i++) {
 814                                if (!dot && isspace(buf[i])) {
 815                                        dot = 1;
 816                                        if (old_name[j++] != '.')
 817                                                break;
 818                                        for (i++; isspace(buf[i]); i++)
 819                                                ; /* do nothing */
 820                                        if (buf[i] != '"')
 821                                                break;
 822                                        continue;
 823                                }
 824                                if (buf[i] == '\\' && dot)
 825                                        i++;
 826                                else if (buf[i] == '"' && dot) {
 827                                        for (i++; isspace(buf[i]); i++)
 828                                                ; /* do_nothing */
 829                                        break;
 830                                }
 831                                if (buf[i] != old_name[j++])
 832                                        break;
 833                        }
 834                        if (buf[i] == ']') {
 835                                /* old_name matches */
 836                                ret++;
 837                                store.baselen = strlen(new_name);
 838                                store_write_section(out_fd, new_name);
 839                                continue;
 840                        }
 841                }
 842                write(out_fd, buf, strlen(buf));
 843        }
 844        fclose(config_file);
 845        if (close(out_fd) || commit_lock_file(lock) < 0)
 846                ret = error("Cannot commit config file!");
 847 out:
 848        free(config_filename);
 849        return ret;
 850}
 851