config.con commit git-svnimport: support for incremental import (40006ea)
   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.ignorestat")) {
 273                assume_unchanged = git_config_bool(var, value);
 274                return 0;
 275        }
 276
 277        if (!strcmp(var, "core.prefersymlinkrefs")) {
 278                prefer_symlink_refs = git_config_bool(var, value);
 279                return 0;
 280        }
 281
 282        if (!strcmp(var, "core.logallrefupdates")) {
 283                log_all_ref_updates = git_config_bool(var, value);
 284                return 0;
 285        }
 286
 287        if (!strcmp(var, "core.warnambiguousrefs")) {
 288                warn_ambiguous_refs = git_config_bool(var, value);
 289                return 0;
 290        }
 291
 292        if (!strcmp(var, "core.legacyheaders")) {
 293                use_legacy_headers = git_config_bool(var, value);
 294                return 0;
 295        }
 296
 297        if (!strcmp(var, "core.compression")) {
 298                int level = git_config_int(var, value);
 299                if (level == -1)
 300                        level = Z_DEFAULT_COMPRESSION;
 301                else if (level < 0 || level > Z_BEST_COMPRESSION)
 302                        die("bad zlib compression level %d", level);
 303                zlib_compression_level = level;
 304                return 0;
 305        }
 306
 307        if (!strcmp(var, "user.name")) {
 308                strlcpy(git_default_name, value, sizeof(git_default_name));
 309                return 0;
 310        }
 311
 312        if (!strcmp(var, "user.email")) {
 313                strlcpy(git_default_email, value, sizeof(git_default_email));
 314                return 0;
 315        }
 316
 317        if (!strcmp(var, "i18n.commitencoding")) {
 318                git_commit_encoding = strdup(value);
 319                return 0;
 320        }
 321
 322        if (!strcmp(var, "i18n.logoutputencoding")) {
 323                git_log_output_encoding = strdup(value);
 324                return 0;
 325        }
 326
 327
 328        if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
 329                pager_use_color = git_config_bool(var,value);
 330                return 0;
 331        }
 332
 333        /* Add other config variables here and to Documentation/config.txt. */
 334        return 0;
 335}
 336
 337int git_config_from_file(config_fn_t fn, const char *filename)
 338{
 339        int ret;
 340        FILE *f = fopen(filename, "r");
 341
 342        ret = -1;
 343        if (f) {
 344                config_file = f;
 345                config_file_name = filename;
 346                config_linenr = 1;
 347                ret = git_parse_file(fn);
 348                fclose(f);
 349                config_file_name = NULL;
 350        }
 351        return ret;
 352}
 353
 354int git_config(config_fn_t fn)
 355{
 356        int ret = 0;
 357        char *repo_config = NULL;
 358        const char *home = NULL, *filename;
 359
 360        /* $GIT_CONFIG makes git read _only_ the given config file,
 361         * $GIT_CONFIG_LOCAL will make it process it in addition to the
 362         * global config file, the same way it would the per-repository
 363         * config file otherwise. */
 364        filename = getenv(CONFIG_ENVIRONMENT);
 365        if (!filename) {
 366                home = getenv("HOME");
 367                filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
 368                if (!filename)
 369                        filename = repo_config = xstrdup(git_path("config"));
 370        }
 371
 372        if (home) {
 373                char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
 374                if (!access(user_config, R_OK))
 375                        ret = git_config_from_file(fn, user_config);
 376                free(user_config);
 377        }
 378
 379        ret += git_config_from_file(fn, filename);
 380        free(repo_config);
 381        return ret;
 382}
 383
 384/*
 385 * Find all the stuff for git_config_set() below.
 386 */
 387
 388#define MAX_MATCHES 512
 389
 390static struct {
 391        int baselen;
 392        char* key;
 393        int do_not_match;
 394        regex_t* value_regex;
 395        int multi_replace;
 396        off_t offset[MAX_MATCHES];
 397        enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
 398        int seen;
 399} store;
 400
 401static int matches(const char* key, const char* value)
 402{
 403        return !strcmp(key, store.key) &&
 404                (store.value_regex == NULL ||
 405                 (store.do_not_match ^
 406                  !regexec(store.value_regex, value, 0, NULL, 0)));
 407}
 408
 409static int store_aux(const char* key, const char* value)
 410{
 411        switch (store.state) {
 412        case KEY_SEEN:
 413                if (matches(key, value)) {
 414                        if (store.seen == 1 && store.multi_replace == 0) {
 415                                fprintf(stderr,
 416                                        "Warning: %s has multiple values\n",
 417                                        key);
 418                        } else if (store.seen >= MAX_MATCHES) {
 419                                fprintf(stderr, "Too many matches\n");
 420                                return 1;
 421                        }
 422
 423                        store.offset[store.seen] = ftell(config_file);
 424                        store.seen++;
 425                }
 426                break;
 427        case SECTION_SEEN:
 428                if (strncmp(key, store.key, store.baselen+1)) {
 429                        store.state = SECTION_END_SEEN;
 430                        break;
 431                } else
 432                        /* do not increment matches: this is no match */
 433                        store.offset[store.seen] = ftell(config_file);
 434                /* fallthru */
 435        case SECTION_END_SEEN:
 436        case START:
 437                if (matches(key, value)) {
 438                        store.offset[store.seen] = ftell(config_file);
 439                        store.state = KEY_SEEN;
 440                        store.seen++;
 441                } else {
 442                        if (strrchr(key, '.') - key == store.baselen &&
 443                              !strncmp(key, store.key, store.baselen)) {
 444                                        store.state = SECTION_SEEN;
 445                                        store.offset[store.seen] = ftell(config_file);
 446                        }
 447                }
 448        }
 449        return 0;
 450}
 451
 452static void store_write_section(int fd, const char* key)
 453{
 454        const char *dot = strchr(key, '.');
 455        int len1 = store.baselen, len2 = -1;
 456
 457        dot = strchr(key, '.');
 458        if (dot) {
 459                int dotlen = dot - key;
 460                if (dotlen < len1) {
 461                        len2 = len1 - dotlen - 1;
 462                        len1 = dotlen;
 463                }
 464        }
 465
 466        write(fd, "[", 1);
 467        write(fd, key, len1);
 468        if (len2 >= 0) {
 469                write(fd, " \"", 2);
 470                while (--len2 >= 0) {
 471                        unsigned char c = *++dot;
 472                        if (c == '"')
 473                                write(fd, "\\", 1);
 474                        write(fd, &c, 1);
 475                }
 476                write(fd, "\"", 1);
 477        }
 478        write(fd, "]\n", 2);
 479}
 480
 481static void store_write_pair(int fd, const char* key, const char* value)
 482{
 483        int i;
 484
 485        write(fd, "\t", 1);
 486        write(fd, key+store.baselen+1,
 487                strlen(key+store.baselen+1));
 488        write(fd, " = ", 3);
 489        for (i = 0; value[i]; i++)
 490                switch (value[i]) {
 491                case '\n': write(fd, "\\n", 2); break;
 492                case '\t': write(fd, "\\t", 2); break;
 493                case '"': case '\\': write(fd, "\\", 1);
 494                default: write(fd, value+i, 1);
 495        }
 496        write(fd, "\n", 1);
 497}
 498
 499static int find_beginning_of_line(const char* contents, int size,
 500        int offset_, int* found_bracket)
 501{
 502        int equal_offset = size, bracket_offset = size;
 503        int offset;
 504
 505        for (offset = offset_-2; offset > 0 
 506                        && contents[offset] != '\n'; offset--)
 507                switch (contents[offset]) {
 508                        case '=': equal_offset = offset; break;
 509                        case ']': bracket_offset = offset; break;
 510                }
 511        if (bracket_offset < equal_offset) {
 512                *found_bracket = 1;
 513                offset = bracket_offset+1;
 514        } else
 515                offset++;
 516
 517        return offset;
 518}
 519
 520int git_config_set(const char* key, const char* value)
 521{
 522        return git_config_set_multivar(key, value, NULL, 0);
 523}
 524
 525/*
 526 * If value==NULL, unset in (remove from) config,
 527 * if value_regex!=NULL, disregard key/value pairs where value does not match.
 528 * if multi_replace==0, nothing, or only one matching key/value is replaced,
 529 *     else all matching key/values (regardless how many) are removed,
 530 *     before the new pair is written.
 531 *
 532 * Returns 0 on success.
 533 *
 534 * This function does this:
 535 *
 536 * - it locks the config file by creating ".git/config.lock"
 537 *
 538 * - it then parses the config using store_aux() as validator to find
 539 *   the position on the key/value pair to replace. If it is to be unset,
 540 *   it must be found exactly once.
 541 *
 542 * - the config file is mmap()ed and the part before the match (if any) is
 543 *   written to the lock file, then the changed part and the rest.
 544 *
 545 * - the config file is removed and the lock file rename()d to it.
 546 *
 547 */
 548int git_config_set_multivar(const char* key, const char* value,
 549        const char* value_regex, int multi_replace)
 550{
 551        int i, dot;
 552        int fd = -1, in_fd;
 553        int ret;
 554        char* config_filename;
 555        char* lock_file;
 556        const char* last_dot = strrchr(key, '.');
 557
 558        config_filename = getenv(CONFIG_ENVIRONMENT);
 559        if (!config_filename) {
 560                config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
 561                if (!config_filename)
 562                        config_filename  = git_path("config");
 563        }
 564        config_filename = xstrdup(config_filename);
 565        lock_file = xstrdup(mkpath("%s.lock", config_filename));
 566
 567        /*
 568         * Since "key" actually contains the section name and the real
 569         * key name separated by a dot, we have to know where the dot is.
 570         */
 571
 572        if (last_dot == NULL) {
 573                fprintf(stderr, "key does not contain a section: %s\n", key);
 574                ret = 2;
 575                goto out_free;
 576        }
 577        store.baselen = last_dot - key;
 578
 579        store.multi_replace = multi_replace;
 580
 581        /*
 582         * Validate the key and while at it, lower case it for matching.
 583         */
 584        store.key = xmalloc(strlen(key) + 1);
 585        dot = 0;
 586        for (i = 0; key[i]; i++) {
 587                unsigned char c = key[i];
 588                if (c == '.')
 589                        dot = 1;
 590                /* Leave the extended basename untouched.. */
 591                if (!dot || i > store.baselen) {
 592                        if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
 593                                fprintf(stderr, "invalid key: %s\n", key);
 594                                free(store.key);
 595                                ret = 1;
 596                                goto out_free;
 597                        }
 598                        c = tolower(c);
 599                }
 600                store.key[i] = c;
 601        }
 602        store.key[i] = 0;
 603
 604        /*
 605         * The lock_file serves a purpose in addition to locking: the new
 606         * contents of .git/config will be written into it.
 607         */
 608        fd = open(lock_file, O_WRONLY | O_CREAT | O_EXCL, 0666);
 609        if (fd < 0 || adjust_shared_perm(lock_file)) {
 610                fprintf(stderr, "could not lock config file\n");
 611                free(store.key);
 612                ret = -1;
 613                goto out_free;
 614        }
 615
 616        /*
 617         * If .git/config does not exist yet, write a minimal version.
 618         */
 619        in_fd = open(config_filename, O_RDONLY);
 620        if ( in_fd < 0 ) {
 621                free(store.key);
 622
 623                if ( ENOENT != errno ) {
 624                        error("opening %s: %s", config_filename,
 625                              strerror(errno));
 626                        ret = 3; /* same as "invalid config file" */
 627                        goto out_free;
 628                }
 629                /* if nothing to unset, error out */
 630                if (value == NULL) {
 631                        ret = 5;
 632                        goto out_free;
 633                }
 634
 635                store.key = (char*)key;
 636                store_write_section(fd, key);
 637                store_write_pair(fd, key, value);
 638        } else{
 639                struct stat st;
 640                char* contents;
 641                int i, copy_begin, copy_end, new_line = 0;
 642
 643                if (value_regex == NULL)
 644                        store.value_regex = NULL;
 645                else {
 646                        if (value_regex[0] == '!') {
 647                                store.do_not_match = 1;
 648                                value_regex++;
 649                        } else
 650                                store.do_not_match = 0;
 651
 652                        store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
 653                        if (regcomp(store.value_regex, value_regex,
 654                                        REG_EXTENDED)) {
 655                                fprintf(stderr, "Invalid pattern: %s\n",
 656                                        value_regex);
 657                                free(store.value_regex);
 658                                ret = 6;
 659                                goto out_free;
 660                        }
 661                }
 662
 663                store.offset[0] = 0;
 664                store.state = START;
 665                store.seen = 0;
 666
 667                /*
 668                 * After this, store.offset will contain the *end* offset
 669                 * of the last match, or remain at 0 if no match was found.
 670                 * As a side effect, we make sure to transform only a valid
 671                 * existing config file.
 672                 */
 673                if (git_config_from_file(store_aux, config_filename)) {
 674                        fprintf(stderr, "invalid config file\n");
 675                        free(store.key);
 676                        if (store.value_regex != NULL) {
 677                                regfree(store.value_regex);
 678                                free(store.value_regex);
 679                        }
 680                        ret = 3;
 681                        goto out_free;
 682                }
 683
 684                free(store.key);
 685                if (store.value_regex != NULL) {
 686                        regfree(store.value_regex);
 687                        free(store.value_regex);
 688                }
 689
 690                /* if nothing to unset, or too many matches, error out */
 691                if ((store.seen == 0 && value == NULL) ||
 692                                (store.seen > 1 && multi_replace == 0)) {
 693                        ret = 5;
 694                        goto out_free;
 695                }
 696
 697                fstat(in_fd, &st);
 698                contents = mmap(NULL, st.st_size, PROT_READ,
 699                        MAP_PRIVATE, in_fd, 0);
 700                close(in_fd);
 701
 702                if (store.seen == 0)
 703                        store.seen = 1;
 704
 705                for (i = 0, copy_begin = 0; i < store.seen; i++) {
 706                        if (store.offset[i] == 0) {
 707                                store.offset[i] = copy_end = st.st_size;
 708                        } else if (store.state != KEY_SEEN) {
 709                                copy_end = store.offset[i];
 710                        } else
 711                                copy_end = find_beginning_of_line(
 712                                        contents, st.st_size,
 713                                        store.offset[i]-2, &new_line);
 714
 715                        /* write the first part of the config */
 716                        if (copy_end > copy_begin) {
 717                                write(fd, contents + copy_begin,
 718                                copy_end - copy_begin);
 719                                if (new_line)
 720                                        write(fd, "\n", 1);
 721                        }
 722                        copy_begin = store.offset[i];
 723                }
 724
 725                /* write the pair (value == NULL means unset) */
 726                if (value != NULL) {
 727                        if (store.state == START)
 728                                store_write_section(fd, key);
 729                        store_write_pair(fd, key, value);
 730                }
 731
 732                /* write the rest of the config */
 733                if (copy_begin < st.st_size)
 734                        write(fd, contents + copy_begin,
 735                                st.st_size - copy_begin);
 736
 737                munmap(contents, st.st_size);
 738                unlink(config_filename);
 739        }
 740
 741        if (rename(lock_file, config_filename) < 0) {
 742                fprintf(stderr, "Could not rename the lock file?\n");
 743                ret = 4;
 744                goto out_free;
 745        }
 746
 747        ret = 0;
 748
 749out_free:
 750        if (0 <= fd)
 751                close(fd);
 752        free(config_filename);
 753        if (lock_file) {
 754                unlink(lock_file);
 755                free(lock_file);
 756        }
 757        return ret;
 758}
 759
 760int git_config_rename_section(const char *old_name, const char *new_name)
 761{
 762        int ret = 0;
 763        char *config_filename;
 764        struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
 765        int out_fd;
 766        char buf[1024];
 767
 768        config_filename = getenv(CONFIG_ENVIRONMENT);
 769        if (!config_filename) {
 770                config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
 771                if (!config_filename)
 772                        config_filename  = git_path("config");
 773        }
 774        config_filename = xstrdup(config_filename);
 775        out_fd = hold_lock_file_for_update(lock, config_filename, 0);
 776        if (out_fd < 0) {
 777                ret = error("Could not lock config file!");
 778                goto out;
 779        }
 780
 781        if (!(config_file = fopen(config_filename, "rb"))) {
 782                ret = error("Could not open config file!");
 783                goto out;
 784        }
 785
 786        while (fgets(buf, sizeof(buf), config_file)) {
 787                int i;
 788                for (i = 0; buf[i] && isspace(buf[i]); i++)
 789                        ; /* do nothing */
 790                if (buf[i] == '[') {
 791                        /* it's a section */
 792                        int j = 0, dot = 0;
 793                        for (i++; buf[i] && buf[i] != ']'; i++) {
 794                                if (!dot && isspace(buf[i])) {
 795                                        dot = 1;
 796                                        if (old_name[j++] != '.')
 797                                                break;
 798                                        for (i++; isspace(buf[i]); i++)
 799                                                ; /* do nothing */
 800                                        if (buf[i] != '"')
 801                                                break;
 802                                        continue;
 803                                }
 804                                if (buf[i] == '\\' && dot)
 805                                        i++;
 806                                else if (buf[i] == '"' && dot) {
 807                                        for (i++; isspace(buf[i]); i++)
 808                                                ; /* do_nothing */
 809                                        break;
 810                                }
 811                                if (buf[i] != old_name[j++])
 812                                        break;
 813                        }
 814                        if (buf[i] == ']') {
 815                                /* old_name matches */
 816                                ret++;
 817                                store.baselen = strlen(new_name);
 818                                store_write_section(out_fd, new_name);
 819                                continue;
 820                        }
 821                }
 822                write(out_fd, buf, strlen(buf));
 823        }
 824        fclose(config_file);
 825        if (close(out_fd) || commit_lock_file(lock) < 0)
 826                ret = error("Cannot commit config file!");
 827 out:
 828        free(config_filename);
 829        return ret;
 830}
 831