#include "pack.h"
#include "cache-tree.h"
#include "tree-walk.h"
+#include "fsck.h"
#include "parse-options.h"
+#include "dir.h"
#define REACHABLE 0x0001
#define SEEN 0x0002
static int check_strict;
static int keep_cache_objects;
static unsigned char head_sha1[20];
+static const char *head_points_at;
static int errors_found;
static int write_lost_and_found;
static int verbose;
return -1;
}
-static int objwarning(struct object *obj, const char *err, ...)
+static int fsck_error_func(struct object *obj, int type, const char *err, ...)
{
va_list params;
va_start(params, err);
- objreport(obj, "warning", err, params);
+ objreport(obj, (type == FSCK_WARN) ? "warning" : "error", err, params);
va_end(params);
- return -1;
+ return (type == FSCK_WARN) ? 0 : 1;
+}
+
+static struct object_array pending;
+
+static int mark_object(struct object *obj, int type, void *data)
+{
+ struct object *parent = data;
+
+ if (!obj) {
+ printf("broken link from %7s %s\n",
+ typename(parent->type), sha1_to_hex(parent->sha1));
+ printf("broken link from %7s %s\n",
+ (type == OBJ_ANY ? "unknown" : typename(type)), "unknown");
+ errors_found |= ERROR_REACHABLE;
+ return 1;
+ }
+
+ if (type != OBJ_ANY && obj->type != type)
+ objerror(parent, "wrong object type in link");
+
+ if (obj->flags & REACHABLE)
+ return 0;
+ obj->flags |= REACHABLE;
+ if (!obj->parsed) {
+ if (parent && !has_sha1_file(obj->sha1)) {
+ printf("broken link from %7s %s\n",
+ typename(parent->type), sha1_to_hex(parent->sha1));
+ printf(" to %7s %s\n",
+ typename(obj->type), sha1_to_hex(obj->sha1));
+ errors_found |= ERROR_REACHABLE;
+ }
+ return 1;
+ }
+
+ add_object_array(obj, (void *) parent, &pending);
+ return 0;
+}
+
+static void mark_object_reachable(struct object *obj)
+{
+ mark_object(obj, OBJ_ANY, 0);
+}
+
+static int traverse_one_object(struct object *obj, struct object *parent)
+{
+ int result;
+ struct tree *tree = NULL;
+
+ if (obj->type == OBJ_TREE) {
+ obj->parsed = 0;
+ tree = (struct tree *)obj;
+ if (parse_tree(tree) < 0)
+ return 1; /* error already displayed */
+ }
+ result = fsck_walk(obj, mark_object, obj);
+ if (tree) {
+ free(tree->buffer);
+ tree->buffer = NULL;
+ }
+ return result;
+}
+
+static int traverse_reachable(void)
+{
+ int result = 0;
+ while (pending.nr) {
+ struct object_array_entry *entry;
+ struct object *obj, *parent;
+
+ entry = pending.objects + --pending.nr;
+ obj = entry->item;
+ parent = (struct object *) entry->name;
+ result |= traverse_one_object(obj, parent);
+ }
+ return !!result;
+}
+
+static int mark_used(struct object *obj, int type, void *data)
+{
+ if (!obj)
+ return 1;
+ obj->used = 1;
+ return 0;
}
/*
*/
static void check_reachable_object(struct object *obj)
{
- const struct object_refs *refs;
-
/*
* We obviously want the object to be parsed,
* except if it was in a pack-file and we didn't
* do a full fsck
*/
if (!obj->parsed) {
- if (has_sha1_pack(obj->sha1, NULL))
+ if (has_sha1_pack(obj->sha1))
return; /* it is in pack - forget about it */
printf("missing %s %s\n", typename(obj->type), sha1_to_hex(obj->sha1));
errors_found |= ERROR_REACHABLE;
return;
}
-
- /*
- * Check that everything that we try to reference is also good.
- */
- refs = lookup_object_refs(obj);
- if (refs) {
- unsigned j;
- for (j = 0; j < refs->count; j++) {
- struct object *ref = refs->ref[j];
- if (ref->parsed ||
- (has_sha1_file(ref->sha1)))
- continue;
- printf("broken link from %7s %s\n",
- typename(obj->type), sha1_to_hex(obj->sha1));
- printf(" to %7s %s\n",
- typename(ref->type), sha1_to_hex(ref->sha1));
- errors_found |= ERROR_REACHABLE;
- }
- }
}
/*
char *buf = read_sha1_file(obj->sha1,
&type, &size);
if (buf) {
- fwrite(buf, size, 1, f);
+ if (fwrite(buf, size, 1, f) != 1)
+ die("Could not write %s: %s",
+ filename, strerror(errno));
free(buf);
}
} else
fprintf(f, "%s\n", sha1_to_hex(obj->sha1));
- fclose(f);
+ if (fclose(f))
+ die("Could not finish %s: %s",
+ filename, strerror(errno));
}
return;
}
{
int i, max;
+ /* Traverse the pending reachable objects */
+ traverse_reachable();
+
/* Look up all the requirements, warn about missing objects.. */
max = get_max_object_index();
if (verbose)
}
}
-/*
- * The entries in a tree are ordered in the _path_ order,
- * which means that a directory entry is ordered by adding
- * a slash to the end of it.
- *
- * So a directory called "a" is ordered _after_ a file
- * called "a.c", because "a/" sorts after "a.c".
- */
-#define TREE_UNORDERED (-1)
-#define TREE_HAS_DUPS (-2)
-
-static int verify_ordered(unsigned mode1, const char *name1, unsigned mode2, const char *name2)
+static int fsck_sha1(const unsigned char *sha1)
{
- int len1 = strlen(name1);
- int len2 = strlen(name2);
- int len = len1 < len2 ? len1 : len2;
- unsigned char c1, c2;
- int cmp;
-
- cmp = memcmp(name1, name2, len);
- if (cmp < 0)
+ struct object *obj = parse_object(sha1);
+ if (!obj) {
+ errors_found |= ERROR_OBJECT;
+ return error("%s: object corrupt or missing",
+ sha1_to_hex(sha1));
+ }
+ if (obj->flags & SEEN)
return 0;
- if (cmp > 0)
- return TREE_UNORDERED;
-
- /*
- * Ok, the first <len> characters are the same.
- * Now we need to order the next one, but turn
- * a '\0' into a '/' for a directory entry.
- */
- c1 = name1[len];
- c2 = name2[len];
- if (!c1 && !c2)
- /*
- * git-write-tree used to write out a nonsense tree that has
- * entries with the same name, one blob and one tree. Make
- * sure we do not have duplicate entries.
- */
- return TREE_HAS_DUPS;
- if (!c1 && S_ISDIR(mode1))
- c1 = '/';
- if (!c2 && S_ISDIR(mode2))
- c2 = '/';
- return c1 < c2 ? 0 : TREE_UNORDERED;
-}
-
-static int fsck_tree(struct tree *item)
-{
- int retval;
- int has_full_path = 0;
- int has_empty_name = 0;
- int has_zero_pad = 0;
- int has_bad_modes = 0;
- int has_dup_entries = 0;
- int not_properly_sorted = 0;
- struct tree_desc desc;
- unsigned o_mode;
- const char *o_name;
- const unsigned char *o_sha1;
+ obj->flags |= SEEN;
if (verbose)
- fprintf(stderr, "Checking tree %s\n",
- sha1_to_hex(item->object.sha1));
-
- init_tree_desc(&desc, item->buffer, item->size);
-
- o_mode = 0;
- o_name = NULL;
- o_sha1 = NULL;
- while (desc.size) {
- unsigned mode;
- const char *name;
- const unsigned char *sha1;
-
- sha1 = tree_entry_extract(&desc, &name, &mode);
-
- if (strchr(name, '/'))
- has_full_path = 1;
- if (!*name)
- has_empty_name = 1;
- has_zero_pad |= *(char *)desc.buffer == '0';
- update_tree_entry(&desc);
-
- switch (mode) {
- /*
- * Standard modes..
- */
- case S_IFREG | 0755:
- case S_IFREG | 0644:
- case S_IFLNK:
- case S_IFDIR:
- case S_IFGITLINK:
- break;
- /*
- * This is nonstandard, but we had a few of these
- * early on when we honored the full set of mode
- * bits..
- */
- case S_IFREG | 0664:
- if (!check_strict)
- break;
- default:
- has_bad_modes = 1;
- }
+ fprintf(stderr, "Checking %s %s\n",
+ typename(obj->type), sha1_to_hex(obj->sha1));
- if (o_name) {
- switch (verify_ordered(o_mode, o_name, mode, name)) {
- case TREE_UNORDERED:
- not_properly_sorted = 1;
- break;
- case TREE_HAS_DUPS:
- has_dup_entries = 1;
- break;
- default:
- break;
- }
- }
+ if (fsck_walk(obj, mark_used, 0))
+ objerror(obj, "broken links");
+ if (fsck_object(obj, check_strict, fsck_error_func))
+ return -1;
- o_mode = mode;
- o_name = name;
- o_sha1 = sha1;
- }
- free(item->buffer);
- item->buffer = NULL;
+ if (obj->type == OBJ_TREE) {
+ struct tree *item = (struct tree *) obj;
- retval = 0;
- if (has_full_path) {
- objwarning(&item->object, "contains full pathnames");
- }
- if (has_empty_name) {
- objwarning(&item->object, "contains empty pathname");
- }
- if (has_zero_pad) {
- objwarning(&item->object, "contains zero-padded file modes");
- }
- if (has_bad_modes) {
- objwarning(&item->object, "contains bad file modes");
- }
- if (has_dup_entries) {
- retval = objerror(&item->object, "contains duplicate file entries");
- }
- if (not_properly_sorted) {
- retval = objerror(&item->object, "not properly sorted");
+ free(item->buffer);
+ item->buffer = NULL;
}
- return retval;
-}
-static int fsck_commit(struct commit *commit)
-{
- char *buffer = commit->buffer;
- unsigned char tree_sha1[20], sha1[20];
+ if (obj->type == OBJ_COMMIT) {
+ struct commit *commit = (struct commit *) obj;
- if (verbose)
- fprintf(stderr, "Checking commit %s\n",
- sha1_to_hex(commit->object.sha1));
-
- if (!commit->date)
- return objerror(&commit->object, "invalid author/committer line");
-
- if (memcmp(buffer, "tree ", 5))
- return objerror(&commit->object, "invalid format - expected 'tree' line");
- if (get_sha1_hex(buffer+5, tree_sha1) || buffer[45] != '\n')
- return objerror(&commit->object, "invalid 'tree' line format - bad sha1");
- buffer += 46;
- while (!memcmp(buffer, "parent ", 7)) {
- if (get_sha1_hex(buffer+7, sha1) || buffer[47] != '\n')
- return objerror(&commit->object, "invalid 'parent' line format - bad sha1");
- buffer += 48;
- }
- if (memcmp(buffer, "author ", 7))
- return objerror(&commit->object, "invalid format - expected 'author' line");
- free(commit->buffer);
- commit->buffer = NULL;
- if (!commit->tree)
- return objerror(&commit->object, "could not load commit's tree %s", tree_sha1);
- if (!commit->parents && show_root)
- printf("root %s\n", sha1_to_hex(commit->object.sha1));
- return 0;
-}
+ free(commit->buffer);
+ commit->buffer = NULL;
-static int fsck_tag(struct tag *tag)
-{
- struct object *tagged = tag->tagged;
+ if (!commit->parents && show_root)
+ printf("root %s\n", sha1_to_hex(commit->object.sha1));
+ }
- if (verbose)
- fprintf(stderr, "Checking tag %s\n",
- sha1_to_hex(tag->object.sha1));
+ if (obj->type == OBJ_TAG) {
+ struct tag *tag = (struct tag *) obj;
- if (!tagged) {
- return objerror(&tag->object, "could not load tagged object");
+ if (show_tags && tag->tagged) {
+ printf("tagged %s %s", typename(tag->tagged->type), sha1_to_hex(tag->tagged->sha1));
+ printf(" (%s) in %s\n", tag->tag, sha1_to_hex(tag->object.sha1));
+ }
}
- if (!show_tags)
- return 0;
- printf("tagged %s %s", typename(tagged->type), sha1_to_hex(tagged->sha1));
- printf(" (%s) in %s\n", tag->tag, sha1_to_hex(tag->object.sha1));
return 0;
}
-static int fsck_sha1(const unsigned char *sha1)
-{
- struct object *obj = parse_object(sha1);
- if (!obj) {
- errors_found |= ERROR_OBJECT;
- return error("%s: object corrupt or missing",
- sha1_to_hex(sha1));
- }
- if (obj->flags & SEEN)
- return 0;
- obj->flags |= SEEN;
- if (obj->type == OBJ_BLOB)
- return 0;
- if (obj->type == OBJ_TREE)
- return fsck_tree((struct tree *) obj);
- if (obj->type == OBJ_COMMIT)
- return fsck_commit((struct commit *) obj);
- if (obj->type == OBJ_TAG)
- return fsck_tag((struct tag *) obj);
-
- /* By now, parse_object() would've returned NULL instead. */
- return objerror(obj, "unknown type '%d' (internal fsck error)",
- obj->type);
-}
-
/*
* This is the sorting chunk size: make it reasonably
* big so that we can sort well..
while ((de = readdir(dir)) != NULL) {
char name[100];
unsigned char sha1[20];
- int len = strlen(de->d_name);
- switch (len) {
- case 2:
- if (de->d_name[1] != '.')
- break;
- case 1:
- if (de->d_name[0] != '.')
- break;
+ if (is_dot_or_dotdot(de->d_name))
continue;
- case 38:
+ if (strlen(de->d_name) == 38) {
sprintf(name, "%02x", i);
- memcpy(name+2, de->d_name, len+1);
+ memcpy(name+2, de->d_name, 39);
if (get_sha1_hex(name, sha1) < 0)
break;
add_sha1_list(sha1, DIRENT_SORT_HINT(de));
continue;
}
+ if (!prefixcmp(de->d_name, "tmp_obj_"))
+ continue;
fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name);
}
closedir(dir);
obj = lookup_object(osha1);
if (obj) {
obj->used = 1;
- mark_reachable(obj, REACHABLE);
+ mark_object_reachable(obj);
}
}
obj = lookup_object(nsha1);
if (obj) {
obj->used = 1;
- mark_reachable(obj, REACHABLE);
+ mark_object_reachable(obj);
}
return 0;
}
error("%s: not a commit", refname);
default_refs++;
obj->used = 1;
- mark_reachable(obj, REACHABLE);
+ mark_object_reachable(obj);
return 0;
}
static void get_default_heads(void)
{
+ if (head_points_at && !is_null_sha1(head_sha1))
+ fsck_handle_ref("HEAD", head_sha1, 0, NULL);
for_each_ref(fsck_handle_ref, NULL);
if (include_reflogs)
for_each_reflog(fsck_handle_reflog, NULL);
static int fsck_head_link(void)
{
- unsigned char sha1[20];
int flag;
int null_is_error = 0;
- const char *head_points_at = resolve_ref("HEAD", sha1, 0, &flag);
if (verbose)
fprintf(stderr, "Checking HEAD link\n");
+ head_points_at = resolve_ref("HEAD", head_sha1, 0, &flag);
if (!head_points_at)
return error("Invalid HEAD");
if (!strcmp(head_points_at, "HEAD"))
else if (prefixcmp(head_points_at, "refs/heads/"))
return error("HEAD points to something strange (%s)",
head_points_at);
- if (is_null_sha1(sha1)) {
+ if (is_null_sha1(head_sha1)) {
if (null_is_error)
return error("HEAD: detached HEAD points at nothing");
fprintf(stderr, "notice: HEAD points to an unborn branch (%s)\n",
sha1_to_hex(it->sha1));
return 1;
}
- mark_reachable(obj, REACHABLE);
+ mark_object_reachable(obj);
obj->used = 1;
if (obj->type != OBJ_TREE)
err |= objerror(obj, "non-tree in cache-tree");
}
static char const * const fsck_usage[] = {
- "git-fsck [options] [<object>...]",
+ "git fsck [options] [<object>...]",
NULL
};
int cmd_fsck(int argc, const char **argv, const char *prefix)
{
int i, heads;
+ struct alternate_object_database *alt;
- track_object_refs = 1;
errors_found = 0;
argc = parse_options(argc, argv, fsck_opts, fsck_usage, 0);
fsck_head_link();
fsck_object_dir(get_object_directory());
+
+ prepare_alt_odb();
+ for (alt = alt_odb_list; alt; alt = alt->next) {
+ char namebuf[PATH_MAX];
+ int namelen = alt->name - alt->base;
+ memcpy(namebuf, alt->base, namelen);
+ namebuf[namelen - 1] = 0;
+ fsck_object_dir(namebuf);
+ }
+
if (check_full) {
- struct alternate_object_database *alt;
struct packed_git *p;
- prepare_alt_odb();
- for (alt = alt_odb_list; alt; alt = alt->next) {
- char namebuf[PATH_MAX];
- int namelen = alt->name - alt->base;
- memcpy(namebuf, alt->base, namelen);
- namebuf[namelen - 1] = 0;
- fsck_object_dir(namebuf);
- }
+
prepare_packed_git();
for (p = packed_git; p; p = p->next)
/* verify gives error messages itself */
- verify_pack(p, 0);
+ verify_pack(p);
for (p = packed_git; p; p = p->next) {
uint32_t j, num;
}
heads = 0;
- for (i = 1; i < argc; i++) {
+ for (i = 0; i < argc; i++) {
const char *arg = argv[i];
- if (!get_sha1(arg, head_sha1)) {
- struct object *obj = lookup_object(head_sha1);
+ unsigned char sha1[20];
+ if (!get_sha1(arg, sha1)) {
+ struct object *obj = lookup_object(sha1);
/* Error is printed by lookup_object(). */
if (!obj)
continue;
obj->used = 1;
- mark_reachable(obj, REACHABLE);
+ mark_object_reachable(obj);
heads++;
continue;
}
continue;
obj = &blob->object;
obj->used = 1;
- mark_reachable(obj, REACHABLE);
+ mark_object_reachable(obj);
}
if (active_cache_tree)
fsck_cache_tree(active_cache_tree);