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