git.oblomov.eu Git - git/blob - builtin/fsck.c

   1 #include "builtin.h"
   2 #include "cache.h"
   3 #include "repository.h"
   4 #include "config.h"
   5 #include "commit.h"
   6 #include "tree.h"
   7 #include "blob.h"
   8 #include "tag.h"
   9 #include "refs.h"
  10 #include "pack.h"
  11 #include "cache-tree.h"
  12 #include "tree-walk.h"
  13 #include "fsck.h"
  14 #include "parse-options.h"
  15 #include "dir.h"
  16 #include "progress.h"
  17 #include "streaming.h"
  18 #include "decorate.h"
  19 #include "packfile.h"
  20 #include "object-store.h"
  21 #include "run-command.h"
  22
  23 #define REACHABLE 0x0001
  24 #define SEEN      0x0002
  25 #define HAS_OBJ   0x0004
  26 /* This flag is set if something points to this object. */
  27 #define USED      0x0008
  28
  29 static int show_root;
  30 static int show_tags;
  31 static int show_unreachable;
  32 static int include_reflogs = 1;
  33 static int check_full = 1;
  34 static int connectivity_only;
  35 static int check_strict;
  36 static int keep_cache_objects;
  37 static struct fsck_options fsck_walk_options = FSCK_OPTIONS_DEFAULT;
  38 static struct fsck_options fsck_obj_options = FSCK_OPTIONS_DEFAULT;
  39 static struct object_id head_oid;
  40 static const char *head_points_at;
  41 static int errors_found;
  42 static int write_lost_and_found;
  43 static int verbose;
  44 static int show_progress = -1;
  45 static int show_dangling = 1;
  46 static int name_objects;
  47 #define ERROR_OBJECT 01
  48 #define ERROR_REACHABLE 02
  49 #define ERROR_PACK 04
  50 #define ERROR_REFS 010
  51 #define ERROR_COMMIT_GRAPH 020
  52
  53 static const char *describe_object(struct object *obj)
  54 {
  55         static struct strbuf buf = STRBUF_INIT;
  56         char *name = name_objects ?
  57                 lookup_decoration(fsck_walk_options.object_names, obj) : NULL;
  58
  59         strbuf_reset(&buf);
  60         strbuf_addstr(&buf, oid_to_hex(&obj->oid));
  61         if (name)
  62                 strbuf_addf(&buf, " (%s)", name);
  63
  64         return buf.buf;
  65 }
  66
  67 static const char *printable_type(struct object *obj)
  68 {
  69         const char *ret;
  70
  71         if (obj->type == OBJ_NONE) {
  72                 enum object_type type = oid_object_info(the_repository,
  73                                                         &obj->oid, NULL);
  74                 if (type > 0)
  75                         object_as_type(obj, type, 0);
  76         }
  77
  78         ret = type_name(obj->type);
  79         if (!ret)
  80                 ret = "unknown";
  81
  82         return ret;
  83 }
  84
  85 static int fsck_config(const char *var, const char *value, void *cb)
  86 {
  87         if (strcmp(var, "fsck.skiplist") == 0) {
  88                 const char *path;
  89                 struct strbuf sb = STRBUF_INIT;
  90
  91                 if (git_config_pathname(&path, var, value))
  92                         return 1;
  93                 strbuf_addf(&sb, "skiplist=%s", path);
  94                 free((char *)path);
  95                 fsck_set_msg_types(&fsck_obj_options, sb.buf);
  96                 strbuf_release(&sb);
  97                 return 0;
  98         }
  99
 100         if (skip_prefix(var, "fsck.", &var)) {
 101                 fsck_set_msg_type(&fsck_obj_options, var, value);
 102                 return 0;
 103         }
 104
 105         return git_default_config(var, value, cb);
 106 }
 107
 108 static void objreport(struct object *obj, const char *msg_type,
 109                         const char *err)
 110 {
 111         fprintf(stderr, "%s in %s %s: %s\n",
 112                 msg_type, printable_type(obj), describe_object(obj), err);
 113 }
 114
 115 static int objerror(struct object *obj, const char *err)
 116 {
 117         errors_found |= ERROR_OBJECT;
 118         objreport(obj, "error", err);
 119         return -1;
 120 }
 121
 122 static int fsck_error_func(struct fsck_options *o,
 123         struct object *obj, int type, const char *message)
 124 {
 125         objreport(obj, (type == FSCK_WARN) ? "warning" : "error", message);
 126         return (type == FSCK_WARN) ? 0 : 1;
 127 }
 128
 129 static struct object_array pending;
 130
 131 static int mark_object(struct object *obj, int type, void *data, struct fsck_options *options)
 132 {
 133         struct object *parent = data;
 134
 135         /*
 136          * The only case data is NULL or type is OBJ_ANY is when
 137          * mark_object_reachable() calls us.  All the callers of
 138          * that function has non-NULL obj hence ...
 139          */
 140         if (!obj) {
 141                 /* ... these references to parent->fld are safe here */
 142                 printf("broken link from %7s %s\n",
 143                            printable_type(parent), describe_object(parent));
 144                 printf("broken link from %7s %s\n",
 145                            (type == OBJ_ANY ? "unknown" : type_name(type)), "unknown");
 146                 errors_found |= ERROR_REACHABLE;
 147                 return 1;
 148         }
 149
 150         if (type != OBJ_ANY && obj->type != type)
 151                 /* ... and the reference to parent is safe here */
 152                 objerror(parent, "wrong object type in link");
 153
 154         if (obj->flags & REACHABLE)
 155                 return 0;
 156         obj->flags |= REACHABLE;
 157
 158         if (is_promisor_object(&obj->oid))
 159                 /*
 160                  * Further recursion does not need to be performed on this
 161                  * object since it is a promisor object (so it does not need to
 162                  * be added to "pending").
 163                  */
 164                 return 0;
 165
 166         if (!(obj->flags & HAS_OBJ)) {
 167                 if (parent && !has_object_file(&obj->oid)) {
 168                         printf("broken link from %7s %s\n",
 169                                  printable_type(parent), describe_object(parent));
 170                         printf("              to %7s %s\n",
 171                                  printable_type(obj), describe_object(obj));
 172                         errors_found |= ERROR_REACHABLE;
 173                 }
 174                 return 1;
 175         }
 176
 177         add_object_array(obj, NULL, &pending);
 178         return 0;
 179 }
 180
 181 static void mark_object_reachable(struct object *obj)
 182 {
 183         mark_object(obj, OBJ_ANY, NULL, NULL);
 184 }
 185
 186 static int traverse_one_object(struct object *obj)
 187 {
 188         int result = fsck_walk(obj, obj, &fsck_walk_options);
 189
 190         if (obj->type == OBJ_TREE) {
 191                 struct tree *tree = (struct tree *)obj;
 192                 free_tree_buffer(tree);
 193         }
 194         return result;
 195 }
 196
 197 static int traverse_reachable(void)
 198 {
 199         struct progress *progress = NULL;
 200         unsigned int nr = 0;
 201         int result = 0;
 202         if (show_progress)
 203                 progress = start_delayed_progress(_("Checking connectivity"), 0);
 204         while (pending.nr) {
 205                 result |= traverse_one_object(object_array_pop(&pending));
 206                 display_progress(progress, ++nr);
 207         }
 208         stop_progress(&progress);
 209         return !!result;
 210 }
 211
 212 static int mark_used(struct object *obj, int type, void *data, struct fsck_options *options)
 213 {
 214         if (!obj)
 215                 return 1;
 216         obj->flags |= USED;
 217         return 0;
 218 }
 219
 220 /*
 221  * Check a single reachable object
 222  */
 223 static void check_reachable_object(struct object *obj)
 224 {
 225         /*
 226          * We obviously want the object to be parsed,
 227          * except if it was in a pack-file and we didn't
 228          * do a full fsck
 229          */
 230         if (!(obj->flags & HAS_OBJ)) {
 231                 if (is_promisor_object(&obj->oid))
 232                         return;
 233                 if (has_object_pack(&obj->oid))
 234                         return; /* it is in pack - forget about it */
 235                 printf("missing %s %s\n", printable_type(obj),
 236                         describe_object(obj));
 237                 errors_found |= ERROR_REACHABLE;
 238                 return;
 239         }
 240 }
 241
 242 /*
 243  * Check a single unreachable object
 244  */
 245 static void check_unreachable_object(struct object *obj)
 246 {
 247         /*
 248          * Missing unreachable object? Ignore it. It's not like
 249          * we miss it (since it can't be reached), nor do we want
 250          * to complain about it being unreachable (since it does
 251          * not exist).
 252          */
 253         if (!(obj->flags & HAS_OBJ))
 254                 return;
 255
 256         /*
 257          * Unreachable object that exists? Show it if asked to,
 258          * since this is something that is prunable.
 259          */
 260         if (show_unreachable) {
 261                 printf("unreachable %s %s\n", printable_type(obj),
 262                         describe_object(obj));
 263                 return;
 264         }
 265
 266         /*
 267          * "!USED" means that nothing at all points to it, including
 268          * other unreachable objects. In other words, it's the "tip"
 269          * of some set of unreachable objects, usually a commit that
 270          * got dropped.
 271          *
 272          * Such starting points are more interesting than some random
 273          * set of unreachable objects, so we show them even if the user
 274          * hasn't asked for _all_ unreachable objects. If you have
 275          * deleted a branch by mistake, this is a prime candidate to
 276          * start looking at, for example.
 277          */
 278         if (!(obj->flags & USED)) {
 279                 if (show_dangling)
 280                         printf("dangling %s %s\n", printable_type(obj),
 281                                describe_object(obj));
 282                 if (write_lost_and_found) {
 283                         char *filename = git_pathdup("lost-found/%s/%s",
 284                                 obj->type == OBJ_COMMIT ? "commit" : "other",
 285                                 describe_object(obj));
 286                         FILE *f;
 287
 288                         if (safe_create_leading_directories_const(filename)) {
 289                                 error("Could not create lost-found");
 290                                 free(filename);
 291                                 return;
 292                         }
 293                         f = xfopen(filename, "w");
 294                         if (obj->type == OBJ_BLOB) {
 295                                 if (stream_blob_to_fd(fileno(f), &obj->oid, NULL, 1))
 296                                         die_errno("Could not write '%s'", filename);
 297                         } else
 298                                 fprintf(f, "%s\n", describe_object(obj));
 299                         if (fclose(f))
 300                                 die_errno("Could not finish '%s'",
 301                                           filename);
 302                         free(filename);
 303                 }
 304                 return;
 305         }
 306
 307         /*
 308          * Otherwise? It's there, it's unreachable, and some other unreachable
 309          * object points to it. Ignore it - it's not interesting, and we showed
 310          * all the interesting cases above.
 311          */
 312 }
 313
 314 static void check_object(struct object *obj)
 315 {
 316         if (verbose)
 317                 fprintf(stderr, "Checking %s\n", describe_object(obj));
 318
 319         if (obj->flags & REACHABLE)
 320                 check_reachable_object(obj);
 321         else
 322                 check_unreachable_object(obj);
 323 }
 324
 325 static void check_connectivity(void)
 326 {
 327         int i, max;
 328
 329         /* Traverse the pending reachable objects */
 330         traverse_reachable();
 331
 332         /* Look up all the requirements, warn about missing objects.. */
 333         max = get_max_object_index();
 334         if (verbose)
 335                 fprintf(stderr, "Checking connectivity (%d objects)\n", max);
 336
 337         for (i = 0; i < max; i++) {
 338                 struct object *obj = get_indexed_object(i);
 339
 340                 if (obj)
 341                         check_object(obj);
 342         }
 343 }
 344
 345 static int fsck_obj(struct object *obj, void *buffer, unsigned long size)
 346 {
 347         int err;
 348
 349         if (obj->flags & SEEN)
 350                 return 0;
 351         obj->flags |= SEEN;
 352
 353         if (verbose)
 354                 fprintf(stderr, "Checking %s %s\n",
 355                         printable_type(obj), describe_object(obj));
 356
 357         if (fsck_walk(obj, NULL, &fsck_obj_options))
 358                 objerror(obj, "broken links");
 359         err = fsck_object(obj, buffer, size, &fsck_obj_options);
 360         if (err)
 361                 goto out;
 362
 363         if (obj->type == OBJ_COMMIT) {
 364                 struct commit *commit = (struct commit *) obj;
 365
 366                 if (!commit->parents && show_root)
 367                         printf("root %s\n", describe_object(&commit->object));
 368         }
 369
 370         if (obj->type == OBJ_TAG) {
 371                 struct tag *tag = (struct tag *) obj;
 372
 373                 if (show_tags && tag->tagged) {
 374                         printf("tagged %s %s", printable_type(tag->tagged),
 375                                 describe_object(tag->tagged));
 376                         printf(" (%s) in %s\n", tag->tag,
 377                                 describe_object(&tag->object));
 378                 }
 379         }
 380
 381 out:
 382         if (obj->type == OBJ_TREE)
 383                 free_tree_buffer((struct tree *)obj);
 384         if (obj->type == OBJ_COMMIT)
 385                 free_commit_buffer((struct commit *)obj);
 386         return err;
 387 }
 388
 389 static int fsck_obj_buffer(const struct object_id *oid, enum object_type type,
 390                            unsigned long size, void *buffer, int *eaten)
 391 {
 392         /*
 393          * Note, buffer may be NULL if type is OBJ_BLOB. See
 394          * verify_packfile(), data_valid variable for details.
 395          */
 396         struct object *obj;
 397         obj = parse_object_buffer(oid, type, size, buffer, eaten);
 398         if (!obj) {
 399                 errors_found |= ERROR_OBJECT;
 400                 return error("%s: object corrupt or missing", oid_to_hex(oid));
 401         }
 402         obj->flags &= ~(REACHABLE | SEEN);
 403         obj->flags |= HAS_OBJ;
 404         return fsck_obj(obj, buffer, size);
 405 }
 406
 407 static int default_refs;
 408
 409 static void fsck_handle_reflog_oid(const char *refname, struct object_id *oid,
 410         timestamp_t timestamp)
 411 {
 412         struct object *obj;
 413
 414         if (!is_null_oid(oid)) {
 415                 obj = lookup_object(oid->hash);
 416                 if (obj && (obj->flags & HAS_OBJ)) {
 417                         if (timestamp && name_objects)
 418                                 add_decoration(fsck_walk_options.object_names,
 419                                         obj,
 420                                         xstrfmt("%s@{%"PRItime"}", refname, timestamp));
 421                         obj->flags |= USED;
 422                         mark_object_reachable(obj);
 423                 } else if (!is_promisor_object(oid)) {
 424                         error("%s: invalid reflog entry %s", refname, oid_to_hex(oid));
 425                         errors_found |= ERROR_REACHABLE;
 426                 }
 427         }
 428 }
 429
 430 static int fsck_handle_reflog_ent(struct object_id *ooid, struct object_id *noid,
 431                 const char *email, timestamp_t timestamp, int tz,
 432                 const char *message, void *cb_data)
 433 {
 434         const char *refname = cb_data;
 435
 436         if (verbose)
 437                 fprintf(stderr, "Checking reflog %s->%s\n",
 438                         oid_to_hex(ooid), oid_to_hex(noid));
 439
 440         fsck_handle_reflog_oid(refname, ooid, 0);
 441         fsck_handle_reflog_oid(refname, noid, timestamp);
 442         return 0;
 443 }
 444
 445 static int fsck_handle_reflog(const char *logname, const struct object_id *oid,
 446                               int flag, void *cb_data)
 447 {
 448         for_each_reflog_ent(logname, fsck_handle_reflog_ent, (void *)logname);
 449         return 0;
 450 }
 451
 452 static int fsck_handle_ref(const char *refname, const struct object_id *oid,
 453                            int flag, void *cb_data)
 454 {
 455         struct object *obj;
 456
 457         obj = parse_object(oid);
 458         if (!obj) {
 459                 if (is_promisor_object(oid)) {
 460                         /*
 461                          * Increment default_refs anyway, because this is a
 462                          * valid ref.
 463                          */
 464                          default_refs++;
 465                          return 0;
 466                 }
 467                 error("%s: invalid sha1 pointer %s", refname, oid_to_hex(oid));
 468                 errors_found |= ERROR_REACHABLE;
 469                 /* We'll continue with the rest despite the error.. */
 470                 return 0;
 471         }
 472         if (obj->type != OBJ_COMMIT && is_branch(refname)) {
 473                 error("%s: not a commit", refname);
 474                 errors_found |= ERROR_REFS;
 475         }
 476         default_refs++;
 477         obj->flags |= USED;
 478         if (name_objects)
 479                 add_decoration(fsck_walk_options.object_names,
 480                         obj, xstrdup(refname));
 481         mark_object_reachable(obj);
 482
 483         return 0;
 484 }
 485
 486 static void get_default_heads(void)
 487 {
 488         if (head_points_at && !is_null_oid(&head_oid))
 489                 fsck_handle_ref("HEAD", &head_oid, 0, NULL);
 490         for_each_rawref(fsck_handle_ref, NULL);
 491         if (include_reflogs)
 492                 for_each_reflog(fsck_handle_reflog, NULL);
 493
 494         /*
 495          * Not having any default heads isn't really fatal, but
 496          * it does mean that "--unreachable" no longer makes any
 497          * sense (since in this case everything will obviously
 498          * be unreachable by definition.
 499          *
 500          * Showing dangling objects is valid, though (as those
 501          * dangling objects are likely lost heads).
 502          *
 503          * So we just print a warning about it, and clear the
 504          * "show_unreachable" flag.
 505          */
 506         if (!default_refs) {
 507                 fprintf(stderr, "notice: No default references\n");
 508                 show_unreachable = 0;
 509         }
 510 }
 511
 512 static int fsck_loose(const struct object_id *oid, const char *path, void *data)
 513 {
 514         struct object *obj;
 515         enum object_type type;
 516         unsigned long size;
 517         void *contents;
 518         int eaten;
 519
 520         if (read_loose_object(path, oid, &type, &size, &contents) < 0) {
 521                 errors_found |= ERROR_OBJECT;
 522                 error("%s: object corrupt or missing: %s",
 523                       oid_to_hex(oid), path);
 524                 return 0; /* keep checking other objects */
 525         }
 526
 527         if (!contents && type != OBJ_BLOB)
 528                 BUG("read_loose_object streamed a non-blob");
 529
 530         obj = parse_object_buffer(oid, type, size, contents, &eaten);
 531         if (!obj) {
 532                 errors_found |= ERROR_OBJECT;
 533                 error("%s: object could not be parsed: %s",
 534                       oid_to_hex(oid), path);
 535                 if (!eaten)
 536                         free(contents);
 537                 return 0; /* keep checking other objects */
 538         }
 539
 540         obj->flags &= ~(REACHABLE | SEEN);
 541         obj->flags |= HAS_OBJ;
 542         if (fsck_obj(obj, contents, size))
 543                 errors_found |= ERROR_OBJECT;
 544
 545         if (!eaten)
 546                 free(contents);
 547         return 0; /* keep checking other objects, even if we saw an error */
 548 }
 549
 550 static int fsck_cruft(const char *basename, const char *path, void *data)
 551 {
 552         if (!starts_with(basename, "tmp_obj_"))
 553                 fprintf(stderr, "bad sha1 file: %s\n", path);
 554         return 0;
 555 }
 556
 557 static int fsck_subdir(unsigned int nr, const char *path, void *progress)
 558 {
 559         display_progress(progress, nr + 1);
 560         return 0;
 561 }
 562
 563 static void fsck_object_dir(const char *path)
 564 {
 565         struct progress *progress = NULL;
 566
 567         if (verbose)
 568                 fprintf(stderr, "Checking object directory\n");
 569
 570         if (show_progress)
 571                 progress = start_progress(_("Checking object directories"), 256);
 572
 573         for_each_loose_file_in_objdir(path, fsck_loose, fsck_cruft, fsck_subdir,
 574                                       progress);
 575         display_progress(progress, 256);
 576         stop_progress(&progress);
 577 }
 578
 579 static int fsck_head_link(void)
 580 {
 581         int null_is_error = 0;
 582
 583         if (verbose)
 584                 fprintf(stderr, "Checking HEAD link\n");
 585
 586         head_points_at = resolve_ref_unsafe("HEAD", 0, &head_oid, NULL);
 587         if (!head_points_at) {
 588                 errors_found |= ERROR_REFS;
 589                 return error("Invalid HEAD");
 590         }
 591         if (!strcmp(head_points_at, "HEAD"))
 592                 /* detached HEAD */
 593                 null_is_error = 1;
 594         else if (!starts_with(head_points_at, "refs/heads/")) {
 595                 errors_found |= ERROR_REFS;
 596                 return error("HEAD points to something strange (%s)",
 597                              head_points_at);
 598         }
 599         if (is_null_oid(&head_oid)) {
 600                 if (null_is_error) {
 601                         errors_found |= ERROR_REFS;
 602                         return error("HEAD: detached HEAD points at nothing");
 603                 }
 604                 fprintf(stderr, "notice: HEAD points to an unborn branch (%s)\n",
 605                         head_points_at + 11);
 606         }
 607         return 0;
 608 }
 609
 610 static int fsck_cache_tree(struct cache_tree *it)
 611 {
 612         int i;
 613         int err = 0;
 614
 615         if (verbose)
 616                 fprintf(stderr, "Checking cache tree\n");
 617
 618         if (0 <= it->entry_count) {
 619                 struct object *obj = parse_object(&it->oid);
 620                 if (!obj) {
 621                         error("%s: invalid sha1 pointer in cache-tree",
 622                               oid_to_hex(&it->oid));
 623                         errors_found |= ERROR_REFS;
 624                         return 1;
 625                 }
 626                 obj->flags |= USED;
 627                 if (name_objects)
 628                         add_decoration(fsck_walk_options.object_names,
 629                                 obj, xstrdup(":"));
 630                 mark_object_reachable(obj);
 631                 if (obj->type != OBJ_TREE)
 632                         err |= objerror(obj, "non-tree in cache-tree");
 633         }
 634         for (i = 0; i < it->subtree_nr; i++)
 635                 err |= fsck_cache_tree(it->down[i]->cache_tree);
 636         return err;
 637 }
 638
 639 static void mark_object_for_connectivity(const struct object_id *oid)
 640 {
 641         struct object *obj = lookup_unknown_object(oid->hash);
 642         obj->flags |= HAS_OBJ;
 643 }
 644
 645 static int mark_loose_for_connectivity(const struct object_id *oid,
 646                                        const char *path,
 647                                        void *data)
 648 {
 649         mark_object_for_connectivity(oid);
 650         return 0;
 651 }
 652
 653 static int mark_packed_for_connectivity(const struct object_id *oid,
 654                                         struct packed_git *pack,
 655                                         uint32_t pos,
 656                                         void *data)
 657 {
 658         mark_object_for_connectivity(oid);
 659         return 0;
 660 }
 661
 662 static char const * const fsck_usage[] = {
 663         N_("git fsck [<options>] [<object>...]"),
 664         NULL
 665 };
 666
 667 static struct option fsck_opts[] = {
 668         OPT__VERBOSE(&verbose, N_("be verbose")),
 669         OPT_BOOL(0, "unreachable", &show_unreachable, N_("show unreachable objects")),
 670         OPT_BOOL(0, "dangling", &show_dangling, N_("show dangling objects")),
 671         OPT_BOOL(0, "tags", &show_tags, N_("report tags")),
 672         OPT_BOOL(0, "root", &show_root, N_("report root nodes")),
 673         OPT_BOOL(0, "cache", &keep_cache_objects, N_("make index objects head nodes")),
 674         OPT_BOOL(0, "reflogs", &include_reflogs, N_("make reflogs head nodes (default)")),
 675         OPT_BOOL(0, "full", &check_full, N_("also consider packs and alternate objects")),
 676         OPT_BOOL(0, "connectivity-only", &connectivity_only, N_("check only connectivity")),
 677         OPT_BOOL(0, "strict", &check_strict, N_("enable more strict checking")),
 678         OPT_BOOL(0, "lost-found", &write_lost_and_found,
 679                                 N_("write dangling objects in .git/lost-found")),
 680         OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
 681         OPT_BOOL(0, "name-objects", &name_objects, N_("show verbose names for reachable objects")),
 682         OPT_END(),
 683 };
 684
 685 int cmd_fsck(int argc, const char **argv, const char *prefix)
 686 {
 687         int i;
 688         struct alternate_object_database *alt;
 689
 690         /* fsck knows how to handle missing promisor objects */
 691         fetch_if_missing = 0;
 692
 693         errors_found = 0;
 694         check_replace_refs = 0;
 695
 696         argc = parse_options(argc, argv, prefix, fsck_opts, fsck_usage, 0);
 697
 698         fsck_walk_options.walk = mark_object;
 699         fsck_obj_options.walk = mark_used;
 700         fsck_obj_options.error_func = fsck_error_func;
 701         if (check_strict)
 702                 fsck_obj_options.strict = 1;
 703
 704         if (show_progress == -1)
 705                 show_progress = isatty(2);
 706         if (verbose)
 707                 show_progress = 0;
 708
 709         if (write_lost_and_found) {
 710                 check_full = 1;
 711                 include_reflogs = 0;
 712         }
 713
 714         if (name_objects)
 715                 fsck_walk_options.object_names =
 716                         xcalloc(1, sizeof(struct decoration));
 717
 718         git_config(fsck_config, NULL);
 719
 720         fsck_head_link();
 721         if (connectivity_only) {
 722                 for_each_loose_object(mark_loose_for_connectivity, NULL, 0);
 723                 for_each_packed_object(mark_packed_for_connectivity, NULL, 0);
 724         } else {
 725                 struct alternate_object_database *alt_odb_list;
 726
 727                 fsck_object_dir(get_object_directory());
 728
 729                 prepare_alt_odb(the_repository);
 730                 alt_odb_list = the_repository->objects->alt_odb_list;
 731                 for (alt = alt_odb_list; alt; alt = alt->next)
 732                         fsck_object_dir(alt->path);
 733
 734                 if (check_full) {
 735                         struct packed_git *p;
 736                         uint32_t total = 0, count = 0;
 737                         struct progress *progress = NULL;
 738
 739                         if (show_progress) {
 740                                 for (p = get_packed_git(the_repository); p;
 741                                      p = p->next) {
 742                                         if (open_pack_index(p))
 743                                                 continue;
 744                                         total += p->num_objects;
 745                                 }
 746
 747                                 progress = start_progress(_("Checking objects"), total);
 748                         }
 749                         for (p = get_packed_git(the_repository); p;
 750                              p = p->next) {
 751                                 /* verify gives error messages itself */
 752                                 if (verify_pack(p, fsck_obj_buffer,
 753                                                 progress, count))
 754                                         errors_found |= ERROR_PACK;
 755                                 count += p->num_objects;
 756                         }
 757                         stop_progress(&progress);
 758                 }
 759
 760                 if (fsck_finish(&fsck_obj_options))
 761                         errors_found |= ERROR_OBJECT;
 762         }
 763
 764         for (i = 0; i < argc; i++) {
 765                 const char *arg = argv[i];
 766                 struct object_id oid;
 767                 if (!get_oid(arg, &oid)) {
 768                         struct object *obj = lookup_object(oid.hash);
 769
 770                         if (!obj || !(obj->flags & HAS_OBJ)) {
 771                                 if (is_promisor_object(&oid))
 772                                         continue;
 773                                 error("%s: object missing", oid_to_hex(&oid));
 774                                 errors_found |= ERROR_OBJECT;
 775                                 continue;
 776                         }
 777
 778                         obj->flags |= USED;
 779                         if (name_objects)
 780                                 add_decoration(fsck_walk_options.object_names,
 781                                         obj, xstrdup(arg));
 782                         mark_object_reachable(obj);
 783                         continue;
 784                 }
 785                 error("invalid parameter: expected sha1, got '%s'", arg);
 786                 errors_found |= ERROR_OBJECT;
 787         }
 788
 789         /*
 790          * If we've not been given any explicit head information, do the
 791          * default ones from .git/refs. We also consider the index file
 792          * in this case (ie this implies --cache).
 793          */
 794         if (!argc) {
 795                 get_default_heads();
 796                 keep_cache_objects = 1;
 797         }
 798
 799         if (keep_cache_objects) {
 800                 verify_index_checksum = 1;
 801                 verify_ce_order = 1;
 802                 read_cache();
 803                 for (i = 0; i < active_nr; i++) {
 804                         unsigned int mode;
 805                         struct blob *blob;
 806                         struct object *obj;
 807
 808                         mode = active_cache[i]->ce_mode;
 809                         if (S_ISGITLINK(mode))
 810                                 continue;
 811                         blob = lookup_blob(&active_cache[i]->oid);
 812                         if (!blob)
 813                                 continue;
 814                         obj = &blob->object;
 815                         obj->flags |= USED;
 816                         if (name_objects)
 817                                 add_decoration(fsck_walk_options.object_names,
 818                                         obj,
 819                                         xstrfmt(":%s", active_cache[i]->name));
 820                         mark_object_reachable(obj);
 821                 }
 822                 if (active_cache_tree)
 823                         fsck_cache_tree(active_cache_tree);
 824         }
 825
 826         check_connectivity();
 827
 828         if (core_commit_graph) {
 829                 struct child_process commit_graph_verify = CHILD_PROCESS_INIT;
 830                 const char *verify_argv[] = { "commit-graph", "verify", NULL, NULL, NULL };
 831
 832                 commit_graph_verify.argv = verify_argv;
 833                 commit_graph_verify.git_cmd = 1;
 834                 if (run_command(&commit_graph_verify))
 835                         errors_found |= ERROR_COMMIT_GRAPH;
 836
 837                 prepare_alt_odb(the_repository);
 838                 for (alt =  the_repository->objects->alt_odb_list; alt; alt = alt->next) {
 839                         verify_argv[2] = "--object-dir";
 840                         verify_argv[3] = alt->path;
 841                         if (run_command(&commit_graph_verify))
 842                                 errors_found |= ERROR_COMMIT_GRAPH;
 843                 }
 844         }
 845
 846         return errors_found;
 847 }