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                 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
 251 int 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
 264 int 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
 337 int 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
 354 int 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
 390 static 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
 401 static 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
 409 static 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
 452 static 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
 481 static 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
 499 static 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
 520 int 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  */
 548 int 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
 749 out_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
 760 int 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