config.c

   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
  12 static FILE *config_file;
  13 static const char *config_file_name;
  14 static int config_linenr;
  15 static 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
  41 static 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
 105 static inline int iskeychar(int c)
 106 {
 107         return isalnum(c) || c == '-';
 108 }
 109
 110 static 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
 141 static 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
 176 static 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
 196 static 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
 234 int 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         }
 242         die("bad config value for '%s' in %s", name, config_file_name);
 243 }
 244
 245 int git_config_bool(const char *name, const char *value)
 246 {
 247         if (!value)
 248                 return 1;
 249         if (!*value)
 250                 return 0;
 251         if (!strcasecmp(value, "true") || !strcasecmp(value, "yes"))
 252                 return 1;
 253         if (!strcasecmp(value, "false") || !strcasecmp(value, "no"))
 254                 return 0;
 255         return git_config_int(name, value) != 0;
 256 }
 257
 258 int git_default_config(const char *var, const char *value)
 259 {
 260         /* This needs a better name */
 261         if (!strcmp(var, "core.filemode")) {
 262                 trust_executable_bit = git_config_bool(var, value);
 263                 return 0;
 264         }
 265
 266         if (!strcmp(var, "core.ignorestat")) {
 267                 assume_unchanged = git_config_bool(var, value);
 268                 return 0;
 269         }
 270
 271         if (!strcmp(var, "core.prefersymlinkrefs")) {
 272                 prefer_symlink_refs = git_config_bool(var, value);
 273                 return 0;
 274         }
 275
 276         if (!strcmp(var, "core.logallrefupdates")) {
 277                 log_all_ref_updates = git_config_bool(var, value);
 278                 return 0;
 279         }
 280
 281         if (!strcmp(var, "core.warnambiguousrefs")) {
 282                 warn_ambiguous_refs = git_config_bool(var, value);
 283                 return 0;
 284         }
 285
 286         if (!strcmp(var, "core.legacyheaders")) {
 287                 use_legacy_headers = git_config_bool(var, value);
 288                 return 0;
 289         }
 290
 291         if (!strcmp(var, "core.compression")) {
 292                 int level = git_config_int(var, value);
 293                 if (level == -1)
 294                         level = Z_DEFAULT_COMPRESSION;
 295                 else if (level < 0 || level > Z_BEST_COMPRESSION)
 296                         die("bad zlib compression level %d", level);
 297                 zlib_compression_level = level;
 298                 return 0;
 299         }
 300
 301         if (!strcmp(var, "user.name")) {
 302                 strlcpy(git_default_name, value, sizeof(git_default_name));
 303                 return 0;
 304         }
 305
 306         if (!strcmp(var, "user.email")) {
 307                 strlcpy(git_default_email, value, sizeof(git_default_email));
 308                 return 0;
 309         }
 310
 311         if (!strcmp(var, "i18n.commitencoding")) {
 312                 strlcpy(git_commit_encoding, value, sizeof(git_commit_encoding));
 313                 return 0;
 314         }
 315
 316         if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
 317                 pager_use_color = git_config_bool(var,value);
 318                 return 0;
 319         }
 320
 321         /* Add other config variables here and to Documentation/config.txt. */
 322         return 0;
 323 }
 324
 325 int git_config_from_file(config_fn_t fn, const char *filename)
 326 {
 327         int ret;
 328         FILE *f = fopen(filename, "r");
 329
 330         ret = -1;
 331         if (f) {
 332                 config_file = f;
 333                 config_file_name = filename;
 334                 config_linenr = 1;
 335                 ret = git_parse_file(fn);
 336                 fclose(f);
 337                 config_file_name = NULL;
 338         }
 339         return ret;
 340 }
 341
 342 int git_config(config_fn_t fn)
 343 {
 344         int ret = 0;
 345         char *repo_config = NULL;
 346         const char *home = NULL, *filename;
 347
 348         /* $GIT_CONFIG makes git read _only_ the given config file,
 349          * $GIT_CONFIG_LOCAL will make it process it in addition to the
 350          * global config file, the same way it would the per-repository
 351          * config file otherwise. */
 352         filename = getenv("GIT_CONFIG");
 353         if (!filename) {
 354                 home = getenv("HOME");
 355                 filename = getenv("GIT_CONFIG_LOCAL");
 356                 if (!filename)
 357                         filename = repo_config = xstrdup(git_path("config"));
 358         }
 359
 360         if (home) {
 361                 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
 362                 if (!access(user_config, R_OK))
 363                         ret = git_config_from_file(fn, user_config);
 364                 free(user_config);
 365         }
 366
 367         ret += git_config_from_file(fn, filename);
 368         free(repo_config);
 369         return ret;
 370 }
 371
 372 /*
 373  * Find all the stuff for git_config_set() below.
 374  */
 375
 376 #define MAX_MATCHES 512
 377
 378 static struct {
 379         int baselen;
 380         char* key;
 381         int do_not_match;
 382         regex_t* value_regex;
 383         int multi_replace;
 384         off_t offset[MAX_MATCHES];
 385         enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
 386         int seen;
 387 } store;
 388
 389 static int matches(const char* key, const char* value)
 390 {
 391         return !strcmp(key, store.key) &&
 392                 (store.value_regex == NULL ||
 393                  (store.do_not_match ^
 394                   !regexec(store.value_regex, value, 0, NULL, 0)));
 395 }
 396
 397 static int store_aux(const char* key, const char* value)
 398 {
 399         switch (store.state) {
 400         case KEY_SEEN:
 401                 if (matches(key, value)) {
 402                         if (store.seen == 1 && store.multi_replace == 0) {
 403                                 fprintf(stderr,
 404                                         "Warning: %s has multiple values\n",
 405                                         key);
 406                         } else if (store.seen >= MAX_MATCHES) {
 407                                 fprintf(stderr, "Too many matches\n");
 408                                 return 1;
 409                         }
 410
 411                         store.offset[store.seen] = ftell(config_file);
 412                         store.seen++;
 413                 }
 414                 break;
 415         case SECTION_SEEN:
 416                 if (strncmp(key, store.key, store.baselen+1)) {
 417                         store.state = SECTION_END_SEEN;
 418                         break;
 419                 } else
 420                         /* do not increment matches: this is no match */
 421                         store.offset[store.seen] = ftell(config_file);
 422                 /* fallthru */
 423         case SECTION_END_SEEN:
 424         case START:
 425                 if (matches(key, value)) {
 426                         store.offset[store.seen] = ftell(config_file);
 427                         store.state = KEY_SEEN;
 428                         store.seen++;
 429                 } else {
 430                         if (strrchr(key, '.') - key == store.baselen &&
 431                               !strncmp(key, store.key, store.baselen)) {
 432                                         store.state = SECTION_SEEN;
 433                                         store.offset[store.seen] = ftell(config_file);
 434                         }
 435                 }
 436         }
 437         return 0;
 438 }
 439
 440 static void store_write_section(int fd, const char* key)
 441 {
 442         const char *dot = strchr(key, '.');
 443         int len1 = store.baselen, len2 = -1;
 444
 445         dot = strchr(key, '.');
 446         if (dot) {
 447                 int dotlen = dot - key;
 448                 if (dotlen < len1) {
 449                         len2 = len1 - dotlen - 1;
 450                         len1 = dotlen;
 451                 }
 452         }
 453
 454         write(fd, "[", 1);
 455         write(fd, key, len1);
 456         if (len2 >= 0) {
 457                 write(fd, " \"", 2);
 458                 while (--len2 >= 0) {
 459                         unsigned char c = *++dot;
 460                         if (c == '"')
 461                                 write(fd, "\\", 1);
 462                         write(fd, &c, 1);
 463                 }
 464                 write(fd, "\"", 1);
 465         }
 466         write(fd, "]\n", 2);
 467 }
 468
 469 static void store_write_pair(int fd, const char* key, const char* value)
 470 {
 471         int i;
 472
 473         write(fd, "\t", 1);
 474         write(fd, key+store.baselen+1,
 475                 strlen(key+store.baselen+1));
 476         write(fd, " = ", 3);
 477         for (i = 0; value[i]; i++)
 478                 switch (value[i]) {
 479                 case '\n': write(fd, "\\n", 2); break;
 480                 case '\t': write(fd, "\\t", 2); break;
 481                 case '"': case '\\': write(fd, "\\", 1);
 482                 default: write(fd, value+i, 1);
 483         }
 484         write(fd, "\n", 1);
 485 }
 486
 487 static int find_beginning_of_line(const char* contents, int size,
 488         int offset_, int* found_bracket)
 489 {
 490         int equal_offset = size, bracket_offset = size;
 491         int offset;
 492
 493         for (offset = offset_-2; offset > 0
 494                         && contents[offset] != '\n'; offset--)
 495                 switch (contents[offset]) {
 496                         case '=': equal_offset = offset; break;
 497                         case ']': bracket_offset = offset; break;
 498                 }
 499         if (bracket_offset < equal_offset) {
 500                 *found_bracket = 1;
 501                 offset = bracket_offset+1;
 502         } else
 503                 offset++;
 504
 505         return offset;
 506 }
 507
 508 int git_config_set(const char* key, const char* value)
 509 {
 510         return git_config_set_multivar(key, value, NULL, 0);
 511 }
 512
 513 /*
 514  * If value==NULL, unset in (remove from) config,
 515  * if value_regex!=NULL, disregard key/value pairs where value does not match.
 516  * if multi_replace==0, nothing, or only one matching key/value is replaced,
 517  *     else all matching key/values (regardless how many) are removed,
 518  *     before the new pair is written.
 519  *
 520  * Returns 0 on success.
 521  *
 522  * This function does this:
 523  *
 524  * - it locks the config file by creating ".git/config.lock"
 525  *
 526  * - it then parses the config using store_aux() as validator to find
 527  *   the position on the key/value pair to replace. If it is to be unset,
 528  *   it must be found exactly once.
 529  *
 530  * - the config file is mmap()ed and the part before the match (if any) is
 531  *   written to the lock file, then the changed part and the rest.
 532  *
 533  * - the config file is removed and the lock file rename()d to it.
 534  *
 535  */
 536 int git_config_set_multivar(const char* key, const char* value,
 537         const char* value_regex, int multi_replace)
 538 {
 539         int i, dot;
 540         int fd = -1, in_fd;
 541         int ret;
 542         char* config_filename;
 543         char* lock_file;
 544         const char* last_dot = strrchr(key, '.');
 545
 546         config_filename = getenv("GIT_CONFIG");
 547         if (!config_filename) {
 548                 config_filename = getenv("GIT_CONFIG_LOCAL");
 549                 if (!config_filename)
 550                         config_filename  = git_path("config");
 551         }
 552         config_filename = xstrdup(config_filename);
 553         lock_file = xstrdup(mkpath("%s.lock", config_filename));
 554
 555         /*
 556          * Since "key" actually contains the section name and the real
 557          * key name separated by a dot, we have to know where the dot is.
 558          */
 559
 560         if (last_dot == NULL) {
 561                 fprintf(stderr, "key does not contain a section: %s\n", key);
 562                 ret = 2;
 563                 goto out_free;
 564         }
 565         store.baselen = last_dot - key;
 566
 567         store.multi_replace = multi_replace;
 568
 569         /*
 570          * Validate the key and while at it, lower case it for matching.
 571          */
 572         store.key = xmalloc(strlen(key) + 1);
 573         dot = 0;
 574         for (i = 0; key[i]; i++) {
 575                 unsigned char c = key[i];
 576                 if (c == '.')
 577                         dot = 1;
 578                 /* Leave the extended basename untouched.. */
 579                 if (!dot || i > store.baselen) {
 580                         if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
 581                                 fprintf(stderr, "invalid key: %s\n", key);
 582                                 free(store.key);
 583                                 ret = 1;
 584                                 goto out_free;
 585                         }
 586                         c = tolower(c);
 587                 }
 588                 store.key[i] = c;
 589         }
 590         store.key[i] = 0;
 591
 592         /*
 593          * The lock_file serves a purpose in addition to locking: the new
 594          * contents of .git/config will be written into it.
 595          */
 596         fd = open(lock_file, O_WRONLY | O_CREAT | O_EXCL, 0666);
 597         if (fd < 0 || adjust_shared_perm(lock_file)) {
 598                 fprintf(stderr, "could not lock config file\n");
 599                 free(store.key);
 600                 ret = -1;
 601                 goto out_free;
 602         }
 603
 604         /*
 605          * If .git/config does not exist yet, write a minimal version.
 606          */
 607         in_fd = open(config_filename, O_RDONLY);
 608         if ( in_fd < 0 ) {
 609                 free(store.key);
 610
 611                 if ( ENOENT != errno ) {
 612                         error("opening %s: %s", config_filename,
 613                               strerror(errno));
 614                         ret = 3; /* same as "invalid config file" */
 615                         goto out_free;
 616                 }
 617                 /* if nothing to unset, error out */
 618                 if (value == NULL) {
 619                         ret = 5;
 620                         goto out_free;
 621                 }
 622
 623                 store.key = (char*)key;
 624                 store_write_section(fd, key);
 625                 store_write_pair(fd, key, value);
 626         } else{
 627                 struct stat st;
 628                 char* contents;
 629                 int i, copy_begin, copy_end, new_line = 0;
 630
 631                 if (value_regex == NULL)
 632                         store.value_regex = NULL;
 633                 else {
 634                         if (value_regex[0] == '!') {
 635                                 store.do_not_match = 1;
 636                                 value_regex++;
 637                         } else
 638                                 store.do_not_match = 0;
 639
 640                         store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
 641                         if (regcomp(store.value_regex, value_regex,
 642                                         REG_EXTENDED)) {
 643                                 fprintf(stderr, "Invalid pattern: %s\n",
 644                                         value_regex);
 645                                 free(store.value_regex);
 646                                 ret = 6;
 647                                 goto out_free;
 648                         }
 649                 }
 650
 651                 store.offset[0] = 0;
 652                 store.state = START;
 653                 store.seen = 0;
 654
 655                 /*
 656                  * After this, store.offset will contain the *end* offset
 657                  * of the last match, or remain at 0 if no match was found.
 658                  * As a side effect, we make sure to transform only a valid
 659                  * existing config file.
 660                  */
 661                 if (git_config_from_file(store_aux, config_filename)) {
 662                         fprintf(stderr, "invalid config file\n");
 663                         free(store.key);
 664                         if (store.value_regex != NULL) {
 665                                 regfree(store.value_regex);
 666                                 free(store.value_regex);
 667                         }
 668                         ret = 3;
 669                         goto out_free;
 670                 }
 671
 672                 free(store.key);
 673                 if (store.value_regex != NULL) {
 674                         regfree(store.value_regex);
 675                         free(store.value_regex);
 676                 }
 677
 678                 /* if nothing to unset, or too many matches, error out */
 679                 if ((store.seen == 0 && value == NULL) ||
 680                                 (store.seen > 1 && multi_replace == 0)) {
 681                         ret = 5;
 682                         goto out_free;
 683                 }
 684
 685                 fstat(in_fd, &st);
 686                 contents = mmap(NULL, st.st_size, PROT_READ,
 687                         MAP_PRIVATE, in_fd, 0);
 688                 close(in_fd);
 689
 690                 if (store.seen == 0)
 691                         store.seen = 1;
 692
 693                 for (i = 0, copy_begin = 0; i < store.seen; i++) {
 694                         if (store.offset[i] == 0) {
 695                                 store.offset[i] = copy_end = st.st_size;
 696                         } else if (store.state != KEY_SEEN) {
 697                                 copy_end = store.offset[i];
 698                         } else
 699                                 copy_end = find_beginning_of_line(
 700                                         contents, st.st_size,
 701                                         store.offset[i]-2, &new_line);
 702
 703                         /* write the first part of the config */
 704                         if (copy_end > copy_begin) {
 705                                 write(fd, contents + copy_begin,
 706                                 copy_end - copy_begin);
 707                                 if (new_line)
 708                                         write(fd, "\n", 1);
 709                         }
 710                         copy_begin = store.offset[i];
 711                 }
 712
 713                 /* write the pair (value == NULL means unset) */
 714                 if (value != NULL) {
 715                         if (store.state == START)
 716                                 store_write_section(fd, key);
 717                         store_write_pair(fd, key, value);
 718                 }
 719
 720                 /* write the rest of the config */
 721                 if (copy_begin < st.st_size)
 722                         write(fd, contents + copy_begin,
 723                                 st.st_size - copy_begin);
 724
 725                 munmap(contents, st.st_size);
 726                 unlink(config_filename);
 727         }
 728
 729         if (rename(lock_file, config_filename) < 0) {
 730                 fprintf(stderr, "Could not rename the lock file?\n");
 731                 ret = 4;
 732                 goto out_free;
 733         }
 734
 735         ret = 0;
 736
 737 out_free:
 738         if (0 <= fd)
 739                 close(fd);
 740         free(config_filename);
 741         if (lock_file) {
 742                 unlink(lock_file);
 743                 free(lock_file);
 744         }
 745         return ret;
 746 }
 747
 748 int git_config_rename_section(const char *old_name, const char *new_name)
 749 {
 750         int ret = 0;
 751         char *config_filename;
 752         struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
 753         int out_fd;
 754         char buf[1024];
 755
 756         config_filename = getenv("GIT_CONFIG");
 757         if (!config_filename) {
 758                 config_filename = getenv("GIT_CONFIG_LOCAL");
 759                 if (!config_filename)
 760                         config_filename  = git_path("config");
 761         }
 762         config_filename = xstrdup(config_filename);
 763         out_fd = hold_lock_file_for_update(lock, config_filename, 0);
 764         if (out_fd < 0) {
 765                 ret = error("Could not lock config file!");
 766                 goto out;
 767         }
 768
 769         if (!(config_file = fopen(config_filename, "rb"))) {
 770                 ret = error("Could not open config file!");
 771                 goto out;
 772         }
 773
 774         while (fgets(buf, sizeof(buf), config_file)) {
 775                 int i;
 776                 for (i = 0; buf[i] && isspace(buf[i]); i++)
 777                         ; /* do nothing */
 778                 if (buf[i] == '[') {
 779                         /* it's a section */
 780                         int j = 0, dot = 0;
 781                         for (i++; buf[i] && buf[i] != ']'; i++) {
 782                                 if (!dot && isspace(buf[i])) {
 783                                         dot = 1;
 784                                         if (old_name[j++] != '.')
 785                                                 break;
 786                                         for (i++; isspace(buf[i]); i++)
 787                                                 ; /* do nothing */
 788                                         if (buf[i] != '"')
 789                                                 break;
 790                                         continue;
 791                                 }
 792                                 if (buf[i] == '\\' && dot)
 793                                         i++;
 794                                 else if (buf[i] == '"' && dot) {
 795                                         for (i++; isspace(buf[i]); i++)
 796                                                 ; /* do_nothing */
 797                                         break;
 798                                 }
 799                                 if (buf[i] != old_name[j++])
 800                                         break;
 801                         }
 802                         if (buf[i] == ']') {
 803                                 /* old_name matches */
 804                                 ret++;
 805                                 store.baselen = strlen(new_name);
 806                                 store_write_section(out_fd, new_name);
 807                                 continue;
 808                         }
 809                 }
 810                 write(out_fd, buf, strlen(buf));
 811         }
 812         fclose(config_file);
 813         if (close(out_fd) || commit_lock_file(lock) < 0)
 814                 ret = error("Cannot commit config file!");
 815  out:
 816         free(config_filename);
 817         return ret;
 818 }
 819