git.oblomov.eu Git - git/blob - builtin-update-index.c

   1 /*
   2  * GIT - The information manager from hell
   3  *
   4  * Copyright (C) Linus Torvalds, 2005
   5  */
   6 #include "cache.h"
   7 #include "strbuf.h"
   8 #include "quote.h"
   9 #include "cache-tree.h"
  10 #include "tree-walk.h"
  11 #include "builtin.h"
  12 #include "refs.h"
  13
  14 /*
  15  * Default to not allowing changes to the list of files. The
  16  * tool doesn't actually care, but this makes it harder to add
  17  * files to the revision control by mistake by doing something
  18  * like "git-update-index *" and suddenly having all the object
  19  * files be revision controlled.
  20  */
  21 static int allow_add;
  22 static int allow_remove;
  23 static int allow_replace;
  24 static int info_only;
  25 static int force_remove;
  26 static int verbose;
  27 static int mark_valid_only;
  28 #define MARK_VALID 1
  29 #define UNMARK_VALID 2
  30
  31 static void report(const char *fmt, ...)
  32 {
  33         va_list vp;
  34
  35         if (!verbose)
  36                 return;
  37
  38         va_start(vp, fmt);
  39         vprintf(fmt, vp);
  40         putchar('\n');
  41         va_end(vp);
  42 }
  43
  44 static int mark_valid(const char *path)
  45 {
  46         int namelen = strlen(path);
  47         int pos = cache_name_pos(path, namelen);
  48         if (0 <= pos) {
  49                 switch (mark_valid_only) {
  50                 case MARK_VALID:
  51                         active_cache[pos]->ce_flags |= htons(CE_VALID);
  52                         break;
  53                 case UNMARK_VALID:
  54                         active_cache[pos]->ce_flags &= ~htons(CE_VALID);
  55                         break;
  56                 }
  57                 cache_tree_invalidate_path(active_cache_tree, path);
  58                 active_cache_changed = 1;
  59                 return 0;
  60         }
  61         return -1;
  62 }
  63
  64 static int remove_one_path(const char *path)
  65 {
  66         if (!allow_remove)
  67                 return error("%s: does not exist and --remove not passed", path);
  68         if (remove_file_from_cache(path))
  69                 return error("%s: cannot remove from the index", path);
  70         return 0;
  71 }
  72
  73 /*
  74  * Handle a path that couldn't be lstat'ed. It's either:
  75  *  - missing file (ENOENT or ENOTDIR). That's ok if we're
  76  *    supposed to be removing it and the removal actually
  77  *    succeeds.
  78  *  - permission error. That's never ok.
  79  */
  80 static int process_lstat_error(const char *path, int err)
  81 {
  82         if (err == ENOENT || err == ENOTDIR)
  83                 return remove_one_path(path);
  84         return error("lstat(\"%s\"): %s", path, strerror(errno));
  85 }
  86
  87 static int add_one_path(struct cache_entry *old, const char *path, int len, struct stat *st)
  88 {
  89         int option, size;
  90         struct cache_entry *ce;
  91
  92         /* Was the old index entry already up-to-date? */
  93         if (old && !ce_stage(old) && !ce_match_stat(old, st, 0))
  94                 return 0;
  95
  96         size = cache_entry_size(len);
  97         ce = xcalloc(1, size);
  98         memcpy(ce->name, path, len);
  99         ce->ce_flags = htons(len);
 100         fill_stat_cache_info(ce, st);
 101         ce->ce_mode = ce_mode_from_stat(old, st->st_mode);
 102
 103         if (index_path(ce->sha1, path, st, !info_only))
 104                 return -1;
 105         option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
 106         option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
 107         if (add_cache_entry(ce, option))
 108                 return error("%s: cannot add to the index - missing --add option?", path);
 109         return 0;
 110 }
 111
 112 /*
 113  * Handle a path that was a directory. Four cases:
 114  *
 115  *  - it's already a gitlink in the index, and we keep it that
 116  *    way, and update it if we can (if we cannot find the HEAD,
 117  *    we're going to keep it unchanged in the index!)
 118  *
 119  *  - it's a *file* in the index, in which case it should be
 120  *    removed as a file if removal is allowed, since it doesn't
 121  *    exist as such any more. If removal isn't allowed, it's
 122  *    an error.
 123  *
 124  *    (NOTE! This is old and arguably fairly strange behaviour.
 125  *    We might want to make this an error unconditionally, and
 126  *    use "--force-remove" if you actually want to force removal).
 127  *
 128  *  - it used to exist as a subdirectory (ie multiple files with
 129  *    this particular prefix) in the index, in which case it's wrong
 130  *    to try to update it as a directory.
 131  *
 132  *  - it doesn't exist at all in the index, but it is a valid
 133  *    git directory, and it should be *added* as a gitlink.
 134  */
 135 static int process_directory(const char *path, int len, struct stat *st)
 136 {
 137         unsigned char sha1[20];
 138         int pos = cache_name_pos(path, len);
 139
 140         /* Exact match: file or existing gitlink */
 141         if (pos >= 0) {
 142                 struct cache_entry *ce = active_cache[pos];
 143                 if (S_ISGITLINK(ntohl(ce->ce_mode))) {
 144
 145                         /* Do nothing to the index if there is no HEAD! */
 146                         if (resolve_gitlink_ref(path, "HEAD", sha1) < 0)
 147                                 return 0;
 148
 149                         return add_one_path(ce, path, len, st);
 150                 }
 151                 /* Should this be an unconditional error? */
 152                 return remove_one_path(path);
 153         }
 154
 155         /* Inexact match: is there perhaps a subdirectory match? */
 156         pos = -pos-1;
 157         while (pos < active_nr) {
 158                 struct cache_entry *ce = active_cache[pos++];
 159
 160                 if (strncmp(ce->name, path, len))
 161                         break;
 162                 if (ce->name[len] > '/')
 163                         break;
 164                 if (ce->name[len] < '/')
 165                         continue;
 166
 167                 /* Subdirectory match - error out */
 168                 return error("%s: is a directory - add individual files instead", path);
 169         }
 170
 171         /* No match - should we add it as a gitlink? */
 172         if (!resolve_gitlink_ref(path, "HEAD", sha1))
 173                 return add_one_path(NULL, path, len, st);
 174
 175         /* Error out. */
 176         return error("%s: is a directory - add files inside instead", path);
 177 }
 178
 179 /*
 180  * Process a regular file
 181  */
 182 static int process_file(const char *path, int len, struct stat *st)
 183 {
 184         int pos = cache_name_pos(path, len);
 185         struct cache_entry *ce = pos < 0 ? NULL : active_cache[pos];
 186
 187         if (ce && S_ISGITLINK(ntohl(ce->ce_mode)))
 188                 return error("%s is already a gitlink, not replacing", path);
 189
 190         return add_one_path(ce, path, len, st);
 191 }
 192
 193 static int process_path(const char *path)
 194 {
 195         int len;
 196         struct stat st;
 197
 198         /*
 199          * First things first: get the stat information, to decide
 200          * what to do about the pathname!
 201          */
 202         if (lstat(path, &st) < 0)
 203                 return process_lstat_error(path, errno);
 204
 205         len = strlen(path);
 206         if (S_ISDIR(st.st_mode))
 207                 return process_directory(path, len, &st);
 208
 209         return process_file(path, len, &st);
 210 }
 211
 212 static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
 213                          const char *path, int stage)
 214 {
 215         int size, len, option;
 216         struct cache_entry *ce;
 217
 218         if (!verify_path(path))
 219                 return -1;
 220
 221         len = strlen(path);
 222         size = cache_entry_size(len);
 223         ce = xcalloc(1, size);
 224
 225         hashcpy(ce->sha1, sha1);
 226         memcpy(ce->name, path, len);
 227         ce->ce_flags = create_ce_flags(len, stage);
 228         ce->ce_mode = create_ce_mode(mode);
 229         if (assume_unchanged)
 230                 ce->ce_flags |= htons(CE_VALID);
 231         option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
 232         option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
 233         if (add_cache_entry(ce, option))
 234                 return error("%s: cannot add to the index - missing --add option?",
 235                              path);
 236         report("add '%s'", path);
 237         return 0;
 238 }
 239
 240 static void chmod_path(int flip, const char *path)
 241 {
 242         int pos;
 243         struct cache_entry *ce;
 244         unsigned int mode;
 245
 246         pos = cache_name_pos(path, strlen(path));
 247         if (pos < 0)
 248                 goto fail;
 249         ce = active_cache[pos];
 250         mode = ntohl(ce->ce_mode);
 251         if (!S_ISREG(mode))
 252                 goto fail;
 253         switch (flip) {
 254         case '+':
 255                 ce->ce_mode |= htonl(0111); break;
 256         case '-':
 257                 ce->ce_mode &= htonl(~0111); break;
 258         default:
 259                 goto fail;
 260         }
 261         cache_tree_invalidate_path(active_cache_tree, path);
 262         active_cache_changed = 1;
 263         report("chmod %cx '%s'", flip, path);
 264         return;
 265  fail:
 266         die("git-update-index: cannot chmod %cx '%s'", flip, path);
 267 }
 268
 269 static void update_one(const char *path, const char *prefix, int prefix_length)
 270 {
 271         const char *p = prefix_path(prefix, prefix_length, path);
 272         if (!verify_path(p)) {
 273                 fprintf(stderr, "Ignoring path %s\n", path);
 274                 goto free_return;
 275         }
 276         if (mark_valid_only) {
 277                 if (mark_valid(p))
 278                         die("Unable to mark file %s", path);
 279                 goto free_return;
 280         }
 281
 282         if (force_remove) {
 283                 if (remove_file_from_cache(p))
 284                         die("git-update-index: unable to remove %s", path);
 285                 report("remove '%s'", path);
 286                 goto free_return;
 287         }
 288         if (process_path(p))
 289                 die("Unable to process path %s", path);
 290         report("add '%s'", path);
 291  free_return:
 292         if (p < path || p > path + strlen(path))
 293                 free((char*)p);
 294 }
 295
 296 static void read_index_info(int line_termination)
 297 {
 298         struct strbuf buf;
 299         strbuf_init(&buf);
 300         while (1) {
 301                 char *ptr, *tab;
 302                 char *path_name;
 303                 unsigned char sha1[20];
 304                 unsigned int mode;
 305                 unsigned long ul;
 306                 int stage;
 307
 308                 /* This reads lines formatted in one of three formats:
 309                  *
 310                  * (1) mode         SP sha1          TAB path
 311                  * The first format is what "git-apply --index-info"
 312                  * reports, and used to reconstruct a partial tree
 313                  * that is used for phony merge base tree when falling
 314                  * back on 3-way merge.
 315                  *
 316                  * (2) mode SP type SP sha1          TAB path
 317                  * The second format is to stuff git-ls-tree output
 318                  * into the index file.
 319                  *
 320                  * (3) mode         SP sha1 SP stage TAB path
 321                  * This format is to put higher order stages into the
 322                  * index file and matches git-ls-files --stage output.
 323                  */
 324                 read_line(&buf, stdin, line_termination);
 325                 if (buf.eof)
 326                         break;
 327
 328                 errno = 0;
 329                 ul = strtoul(buf.buf, &ptr, 8);
 330                 if (ptr == buf.buf || *ptr != ' '
 331                     || errno || (unsigned int) ul != ul)
 332                         goto bad_line;
 333                 mode = ul;
 334
 335                 tab = strchr(ptr, '\t');
 336                 if (!tab || tab - ptr < 41)
 337                         goto bad_line;
 338
 339                 if (tab[-2] == ' ' && '0' <= tab[-1] && tab[-1] <= '3') {
 340                         stage = tab[-1] - '0';
 341                         ptr = tab + 1; /* point at the head of path */
 342                         tab = tab - 2; /* point at tail of sha1 */
 343                 }
 344                 else {
 345                         stage = 0;
 346                         ptr = tab + 1; /* point at the head of path */
 347                 }
 348
 349                 if (get_sha1_hex(tab - 40, sha1) || tab[-41] != ' ')
 350                         goto bad_line;
 351
 352                 if (line_termination && ptr[0] == '"')
 353                         path_name = unquote_c_style(ptr, NULL);
 354                 else
 355                         path_name = ptr;
 356
 357                 if (!verify_path(path_name)) {
 358                         fprintf(stderr, "Ignoring path %s\n", path_name);
 359                         if (path_name != ptr)
 360                                 free(path_name);
 361                         continue;
 362                 }
 363
 364                 if (!mode) {
 365                         /* mode == 0 means there is no such path -- remove */
 366                         if (remove_file_from_cache(path_name))
 367                                 die("git-update-index: unable to remove %s",
 368                                     ptr);
 369                 }
 370                 else {
 371                         /* mode ' ' sha1 '\t' name
 372                          * ptr[-1] points at tab,
 373                          * ptr[-41] is at the beginning of sha1
 374                          */
 375                         ptr[-42] = ptr[-1] = 0;
 376                         if (add_cacheinfo(mode, sha1, path_name, stage))
 377                                 die("git-update-index: unable to update %s",
 378                                     path_name);
 379                 }
 380                 if (path_name != ptr)
 381                         free(path_name);
 382                 continue;
 383
 384         bad_line:
 385                 die("malformed index info %s", buf.buf);
 386         }
 387 }
 388
 389 static const char update_index_usage[] =
 390 "git-update-index [-q] [--add] [--replace] [--remove] [--unmerged] [--refresh] [--really-refresh] [--cacheinfo] [--chmod=(+|-)x] [--assume-unchanged] [--info-only] [--force-remove] [--stdin] [--index-info] [--unresolve] [--again | -g] [--ignore-missing] [-z] [--verbose] [--] <file>...";
 391
 392 static unsigned char head_sha1[20];
 393 static unsigned char merge_head_sha1[20];
 394
 395 static struct cache_entry *read_one_ent(const char *which,
 396                                         unsigned char *ent, const char *path,
 397                                         int namelen, int stage)
 398 {
 399         unsigned mode;
 400         unsigned char sha1[20];
 401         int size;
 402         struct cache_entry *ce;
 403
 404         if (get_tree_entry(ent, path, sha1, &mode)) {
 405                 if (which)
 406                         error("%s: not in %s branch.", path, which);
 407                 return NULL;
 408         }
 409         if (mode == S_IFDIR) {
 410                 if (which)
 411                         error("%s: not a blob in %s branch.", path, which);
 412                 return NULL;
 413         }
 414         size = cache_entry_size(namelen);
 415         ce = xcalloc(1, size);
 416
 417         hashcpy(ce->sha1, sha1);
 418         memcpy(ce->name, path, namelen);
 419         ce->ce_flags = create_ce_flags(namelen, stage);
 420         ce->ce_mode = create_ce_mode(mode);
 421         return ce;
 422 }
 423
 424 static int unresolve_one(const char *path)
 425 {
 426         int namelen = strlen(path);
 427         int pos;
 428         int ret = 0;
 429         struct cache_entry *ce_2 = NULL, *ce_3 = NULL;
 430
 431         /* See if there is such entry in the index. */
 432         pos = cache_name_pos(path, namelen);
 433         if (pos < 0) {
 434                 /* If there isn't, either it is unmerged, or
 435                  * resolved as "removed" by mistake.  We do not
 436                  * want to do anything in the former case.
 437                  */
 438                 pos = -pos-1;
 439                 if (pos < active_nr) {
 440                         struct cache_entry *ce = active_cache[pos];
 441                         if (ce_namelen(ce) == namelen &&
 442                             !memcmp(ce->name, path, namelen)) {
 443                                 fprintf(stderr,
 444                                         "%s: skipping still unmerged path.\n",
 445                                         path);
 446                                 goto free_return;
 447                         }
 448                 }
 449         }
 450
 451         /* Grab blobs from given path from HEAD and MERGE_HEAD,
 452          * stuff HEAD version in stage #2,
 453          * stuff MERGE_HEAD version in stage #3.
 454          */
 455         ce_2 = read_one_ent("our", head_sha1, path, namelen, 2);
 456         ce_3 = read_one_ent("their", merge_head_sha1, path, namelen, 3);
 457
 458         if (!ce_2 || !ce_3) {
 459                 ret = -1;
 460                 goto free_return;
 461         }
 462         if (!hashcmp(ce_2->sha1, ce_3->sha1) &&
 463             ce_2->ce_mode == ce_3->ce_mode) {
 464                 fprintf(stderr, "%s: identical in both, skipping.\n",
 465                         path);
 466                 goto free_return;
 467         }
 468
 469         remove_file_from_cache(path);
 470         if (add_cache_entry(ce_2, ADD_CACHE_OK_TO_ADD)) {
 471                 error("%s: cannot add our version to the index.", path);
 472                 ret = -1;
 473                 goto free_return;
 474         }
 475         if (!add_cache_entry(ce_3, ADD_CACHE_OK_TO_ADD))
 476                 return 0;
 477         error("%s: cannot add their version to the index.", path);
 478         ret = -1;
 479  free_return:
 480         free(ce_2);
 481         free(ce_3);
 482         return ret;
 483 }
 484
 485 static void read_head_pointers(void)
 486 {
 487         if (read_ref("HEAD", head_sha1))
 488                 die("No HEAD -- no initial commit yet?\n");
 489         if (read_ref("MERGE_HEAD", merge_head_sha1)) {
 490                 fprintf(stderr, "Not in the middle of a merge.\n");
 491                 exit(0);
 492         }
 493 }
 494
 495 static int do_unresolve(int ac, const char **av,
 496                         const char *prefix, int prefix_length)
 497 {
 498         int i;
 499         int err = 0;
 500
 501         /* Read HEAD and MERGE_HEAD; if MERGE_HEAD does not exist, we
 502          * are not doing a merge, so exit with success status.
 503          */
 504         read_head_pointers();
 505
 506         for (i = 1; i < ac; i++) {
 507                 const char *arg = av[i];
 508                 const char *p = prefix_path(prefix, prefix_length, arg);
 509                 err |= unresolve_one(p);
 510                 if (p < arg || p > arg + strlen(arg))
 511                         free((char*)p);
 512         }
 513         return err;
 514 }
 515
 516 static int do_reupdate(int ac, const char **av,
 517                        const char *prefix, int prefix_length)
 518 {
 519         /* Read HEAD and run update-index on paths that are
 520          * merged and already different between index and HEAD.
 521          */
 522         int pos;
 523         int has_head = 1;
 524         const char **pathspec = get_pathspec(prefix, av + 1);
 525
 526         if (read_ref("HEAD", head_sha1))
 527                 /* If there is no HEAD, that means it is an initial
 528                  * commit.  Update everything in the index.
 529                  */
 530                 has_head = 0;
 531  redo:
 532         for (pos = 0; pos < active_nr; pos++) {
 533                 struct cache_entry *ce = active_cache[pos];
 534                 struct cache_entry *old = NULL;
 535                 int save_nr;
 536
 537                 if (ce_stage(ce) || !ce_path_match(ce, pathspec))
 538                         continue;
 539                 if (has_head)
 540                         old = read_one_ent(NULL, head_sha1,
 541                                            ce->name, ce_namelen(ce), 0);
 542                 if (old && ce->ce_mode == old->ce_mode &&
 543                     !hashcmp(ce->sha1, old->sha1)) {
 544                         free(old);
 545                         continue; /* unchanged */
 546                 }
 547                 /* Be careful.  The working tree may not have the
 548                  * path anymore, in which case, under 'allow_remove',
 549                  * or worse yet 'allow_replace', active_nr may decrease.
 550                  */
 551                 save_nr = active_nr;
 552                 update_one(ce->name + prefix_length, prefix, prefix_length);
 553                 if (save_nr != active_nr)
 554                         goto redo;
 555         }
 556         return 0;
 557 }
 558
 559 int cmd_update_index(int argc, const char **argv, const char *prefix)
 560 {
 561         int i, newfd, entries, has_errors = 0, line_termination = '\n';
 562         int allow_options = 1;
 563         int read_from_stdin = 0;
 564         int prefix_length = prefix ? strlen(prefix) : 0;
 565         char set_executable_bit = 0;
 566         unsigned int refresh_flags = 0;
 567         int lock_error = 0;
 568         struct lock_file *lock_file;
 569
 570         git_config(git_default_config);
 571
 572         /* We can't free this memory, it becomes part of a linked list parsed atexit() */
 573         lock_file = xcalloc(1, sizeof(struct lock_file));
 574
 575         newfd = hold_locked_index(lock_file, 0);
 576         if (newfd < 0)
 577                 lock_error = errno;
 578
 579         entries = read_cache();
 580         if (entries < 0)
 581                 die("cache corrupted");
 582
 583         for (i = 1 ; i < argc; i++) {
 584                 const char *path = argv[i];
 585                 const char *p;
 586
 587                 if (allow_options && *path == '-') {
 588                         if (!strcmp(path, "--")) {
 589                                 allow_options = 0;
 590                                 continue;
 591                         }
 592                         if (!strcmp(path, "-q")) {
 593                                 refresh_flags |= REFRESH_QUIET;
 594                                 continue;
 595                         }
 596                         if (!strcmp(path, "--add")) {
 597                                 allow_add = 1;
 598                                 continue;
 599                         }
 600                         if (!strcmp(path, "--replace")) {
 601                                 allow_replace = 1;
 602                                 continue;
 603                         }
 604                         if (!strcmp(path, "--remove")) {
 605                                 allow_remove = 1;
 606                                 continue;
 607                         }
 608                         if (!strcmp(path, "--unmerged")) {
 609                                 refresh_flags |= REFRESH_UNMERGED;
 610                                 continue;
 611                         }
 612                         if (!strcmp(path, "--refresh")) {
 613                                 has_errors |= refresh_cache(refresh_flags);
 614                                 continue;
 615                         }
 616                         if (!strcmp(path, "--really-refresh")) {
 617                                 has_errors |= refresh_cache(REFRESH_REALLY | refresh_flags);
 618                                 continue;
 619                         }
 620                         if (!strcmp(path, "--cacheinfo")) {
 621                                 unsigned char sha1[20];
 622                                 unsigned int mode;
 623
 624                                 if (i+3 >= argc)
 625                                         die("git-update-index: --cacheinfo <mode> <sha1> <path>");
 626
 627                                 if (strtoul_ui(argv[i+1], 8, &mode) ||
 628                                     get_sha1_hex(argv[i+2], sha1) ||
 629                                     add_cacheinfo(mode, sha1, argv[i+3], 0))
 630                                         die("git-update-index: --cacheinfo"
 631                                             " cannot add %s", argv[i+3]);
 632                                 i += 3;
 633                                 continue;
 634                         }
 635                         if (!strcmp(path, "--chmod=-x") ||
 636                             !strcmp(path, "--chmod=+x")) {
 637                                 if (argc <= i+1)
 638                                         die("git-update-index: %s <path>", path);
 639                                 set_executable_bit = path[8];
 640                                 continue;
 641                         }
 642                         if (!strcmp(path, "--assume-unchanged")) {
 643                                 mark_valid_only = MARK_VALID;
 644                                 continue;
 645                         }
 646                         if (!strcmp(path, "--no-assume-unchanged")) {
 647                                 mark_valid_only = UNMARK_VALID;
 648                                 continue;
 649                         }
 650                         if (!strcmp(path, "--info-only")) {
 651                                 info_only = 1;
 652                                 continue;
 653                         }
 654                         if (!strcmp(path, "--force-remove")) {
 655                                 force_remove = 1;
 656                                 continue;
 657                         }
 658                         if (!strcmp(path, "-z")) {
 659                                 line_termination = 0;
 660                                 continue;
 661                         }
 662                         if (!strcmp(path, "--stdin")) {
 663                                 if (i != argc - 1)
 664                                         die("--stdin must be at the end");
 665                                 read_from_stdin = 1;
 666                                 break;
 667                         }
 668                         if (!strcmp(path, "--index-info")) {
 669                                 if (i != argc - 1)
 670                                         die("--index-info must be at the end");
 671                                 allow_add = allow_replace = allow_remove = 1;
 672                                 read_index_info(line_termination);
 673                                 break;
 674                         }
 675                         if (!strcmp(path, "--unresolve")) {
 676                                 has_errors = do_unresolve(argc - i, argv + i,
 677                                                           prefix, prefix_length);
 678                                 if (has_errors)
 679                                         active_cache_changed = 0;
 680                                 goto finish;
 681                         }
 682                         if (!strcmp(path, "--again") || !strcmp(path, "-g")) {
 683                                 has_errors = do_reupdate(argc - i, argv + i,
 684                                                          prefix, prefix_length);
 685                                 if (has_errors)
 686                                         active_cache_changed = 0;
 687                                 goto finish;
 688                         }
 689                         if (!strcmp(path, "--ignore-missing")) {
 690                                 refresh_flags |= REFRESH_IGNORE_MISSING;
 691                                 continue;
 692                         }
 693                         if (!strcmp(path, "--verbose")) {
 694                                 verbose = 1;
 695                                 continue;
 696                         }
 697                         if (!strcmp(path, "-h") || !strcmp(path, "--help"))
 698                                 usage(update_index_usage);
 699                         die("unknown option %s", path);
 700                 }
 701                 p = prefix_path(prefix, prefix_length, path);
 702                 update_one(p, NULL, 0);
 703                 if (set_executable_bit)
 704                         chmod_path(set_executable_bit, p);
 705                 if (p < path || p > path + strlen(path))
 706                         free((char*)p);
 707         }
 708         if (read_from_stdin) {
 709                 struct strbuf buf;
 710                 strbuf_init(&buf);
 711                 while (1) {
 712                         char *path_name;
 713                         const char *p;
 714                         read_line(&buf, stdin, line_termination);
 715                         if (buf.eof)
 716                                 break;
 717                         if (line_termination && buf.buf[0] == '"')
 718                                 path_name = unquote_c_style(buf.buf, NULL);
 719                         else
 720                                 path_name = buf.buf;
 721                         p = prefix_path(prefix, prefix_length, path_name);
 722                         update_one(p, NULL, 0);
 723                         if (set_executable_bit)
 724                                 chmod_path(set_executable_bit, p);
 725                         if (p < path_name || p > path_name + strlen(path_name))
 726                                 free((char*) p);
 727                         if (path_name != buf.buf)
 728                                 free(path_name);
 729                 }
 730         }
 731
 732  finish:
 733         if (active_cache_changed) {
 734                 if (newfd < 0) {
 735                         if (refresh_flags & REFRESH_QUIET)
 736                                 exit(128);
 737                         die("unable to create '%s.lock': %s",
 738                             get_index_file(), strerror(lock_error));
 739                 }
 740                 if (write_cache(newfd, active_cache, active_nr) ||
 741                     close(newfd) || commit_locked_index(lock_file))
 742                         die("Unable to write new index file");
 743         }
 744
 745         rollback_lock_file(lock_file);
 746
 747         return has_errors ? 1 : 0;
 748 }