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-rw-r--r--builtin-fsck.c681
1 files changed, 0 insertions, 681 deletions
diff --git a/builtin-fsck.c b/builtin-fsck.c
deleted file mode 100644
index b3d38fa277..0000000000
--- a/builtin-fsck.c
+++ /dev/null
@@ -1,681 +0,0 @@
-#include "builtin.h"
-#include "cache.h"
-#include "commit.h"
-#include "tree.h"
-#include "blob.h"
-#include "tag.h"
-#include "refs.h"
-#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 show_root;
-static int show_tags;
-static int show_unreachable;
-static int include_reflogs = 1;
-static int check_full;
-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;
-#define ERROR_OBJECT 01
-#define ERROR_REACHABLE 02
-
-#ifdef NO_D_INO_IN_DIRENT
-#define SORT_DIRENT 0
-#define DIRENT_SORT_HINT(de) 0
-#else
-#define SORT_DIRENT 1
-#define DIRENT_SORT_HINT(de) ((de)->d_ino)
-#endif
-
-static void objreport(struct object *obj, const char *severity,
- const char *err, va_list params)
-{
- fprintf(stderr, "%s in %s %s: ",
- severity, typename(obj->type), sha1_to_hex(obj->sha1));
- vfprintf(stderr, err, params);
- fputs("\n", stderr);
-}
-
-static int objerror(struct object *obj, const char *err, ...)
-{
- va_list params;
- va_start(params, err);
- errors_found |= ERROR_OBJECT;
- objreport(obj, "error", err, params);
- va_end(params);
- return -1;
-}
-
-static int fsck_error_func(struct object *obj, int type, const char *err, ...)
-{
- va_list params;
- va_start(params, err);
- objreport(obj, (type == FSCK_WARN) ? "warning" : "error", err, params);
- va_end(params);
- 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, NULL);
-}
-
-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;
-}
-
-/*
- * Check a single reachable object
- */
-static void check_reachable_object(struct object *obj)
-{
- /*
- * 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))
- 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 a single unreachable object
- */
-static void check_unreachable_object(struct object *obj)
-{
- /*
- * Missing unreachable object? Ignore it. It's not like
- * we miss it (since it can't be reached), nor do we want
- * to complain about it being unreachable (since it does
- * not exist).
- */
- if (!obj->parsed)
- return;
-
- /*
- * Unreachable object that exists? Show it if asked to,
- * since this is something that is prunable.
- */
- if (show_unreachable) {
- printf("unreachable %s %s\n", typename(obj->type), sha1_to_hex(obj->sha1));
- return;
- }
-
- /*
- * "!used" means that nothing at all points to it, including
- * other unreachable objects. In other words, it's the "tip"
- * of some set of unreachable objects, usually a commit that
- * got dropped.
- *
- * Such starting points are more interesting than some random
- * set of unreachable objects, so we show them even if the user
- * hasn't asked for _all_ unreachable objects. If you have
- * deleted a branch by mistake, this is a prime candidate to
- * start looking at, for example.
- */
- if (!obj->used) {
- printf("dangling %s %s\n", typename(obj->type),
- sha1_to_hex(obj->sha1));
- if (write_lost_and_found) {
- char *filename = git_path("lost-found/%s/%s",
- obj->type == OBJ_COMMIT ? "commit" : "other",
- sha1_to_hex(obj->sha1));
- FILE *f;
-
- if (safe_create_leading_directories(filename)) {
- error("Could not create lost-found");
- return;
- }
- if (!(f = fopen(filename, "w")))
- die_errno("Could not open '%s'", filename);
- if (obj->type == OBJ_BLOB) {
- enum object_type type;
- unsigned long size;
- char *buf = read_sha1_file(obj->sha1,
- &type, &size);
- if (buf) {
- if (fwrite(buf, size, 1, f) != 1)
- die_errno("Could not write '%s'",
- filename);
- free(buf);
- }
- } else
- fprintf(f, "%s\n", sha1_to_hex(obj->sha1));
- if (fclose(f))
- die_errno("Could not finish '%s'",
- filename);
- }
- return;
- }
-
- /*
- * Otherwise? It's there, it's unreachable, and some other unreachable
- * object points to it. Ignore it - it's not interesting, and we showed
- * all the interesting cases above.
- */
-}
-
-static void check_object(struct object *obj)
-{
- if (verbose)
- fprintf(stderr, "Checking %s\n", sha1_to_hex(obj->sha1));
-
- if (obj->flags & REACHABLE)
- check_reachable_object(obj);
- else
- check_unreachable_object(obj);
-}
-
-static void check_connectivity(void)
-{
- 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)
- fprintf(stderr, "Checking connectivity (%d objects)\n", max);
-
- for (i = 0; i < max; i++) {
- struct object *obj = get_indexed_object(i);
-
- if (obj)
- check_object(obj);
- }
-}
-
-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 (verbose)
- fprintf(stderr, "Checking %s %s\n",
- typename(obj->type), sha1_to_hex(obj->sha1));
-
- if (fsck_walk(obj, mark_used, NULL))
- objerror(obj, "broken links");
- if (fsck_object(obj, check_strict, fsck_error_func))
- return -1;
-
- if (obj->type == OBJ_TREE) {
- struct tree *item = (struct tree *) obj;
-
- free(item->buffer);
- item->buffer = NULL;
- }
-
- if (obj->type == OBJ_COMMIT) {
- struct commit *commit = (struct commit *) obj;
-
- free(commit->buffer);
- commit->buffer = NULL;
-
- if (!commit->parents && show_root)
- printf("root %s\n", sha1_to_hex(commit->object.sha1));
- }
-
- if (obj->type == OBJ_TAG) {
- struct tag *tag = (struct tag *) obj;
-
- 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));
- }
- }
-
- return 0;
-}
-
-/*
- * This is the sorting chunk size: make it reasonably
- * big so that we can sort well..
- */
-#define MAX_SHA1_ENTRIES (1024)
-
-struct sha1_entry {
- unsigned long ino;
- unsigned char sha1[20];
-};
-
-static struct {
- unsigned long nr;
- struct sha1_entry *entry[MAX_SHA1_ENTRIES];
-} sha1_list;
-
-static int ino_compare(const void *_a, const void *_b)
-{
- const struct sha1_entry *a = _a, *b = _b;
- unsigned long ino1 = a->ino, ino2 = b->ino;
- return ino1 < ino2 ? -1 : ino1 > ino2 ? 1 : 0;
-}
-
-static void fsck_sha1_list(void)
-{
- int i, nr = sha1_list.nr;
-
- if (SORT_DIRENT)
- qsort(sha1_list.entry, nr,
- sizeof(struct sha1_entry *), ino_compare);
- for (i = 0; i < nr; i++) {
- struct sha1_entry *entry = sha1_list.entry[i];
- unsigned char *sha1 = entry->sha1;
-
- sha1_list.entry[i] = NULL;
- fsck_sha1(sha1);
- free(entry);
- }
- sha1_list.nr = 0;
-}
-
-static void add_sha1_list(unsigned char *sha1, unsigned long ino)
-{
- struct sha1_entry *entry = xmalloc(sizeof(*entry));
- int nr;
-
- entry->ino = ino;
- hashcpy(entry->sha1, sha1);
- nr = sha1_list.nr;
- if (nr == MAX_SHA1_ENTRIES) {
- fsck_sha1_list();
- nr = 0;
- }
- sha1_list.entry[nr] = entry;
- sha1_list.nr = ++nr;
-}
-
-static void fsck_dir(int i, char *path)
-{
- DIR *dir = opendir(path);
- struct dirent *de;
-
- if (!dir)
- return;
-
- if (verbose)
- fprintf(stderr, "Checking directory %s\n", path);
-
- while ((de = readdir(dir)) != NULL) {
- char name[100];
- unsigned char sha1[20];
-
- if (is_dot_or_dotdot(de->d_name))
- continue;
- if (strlen(de->d_name) == 38) {
- sprintf(name, "%02x", i);
- 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);
-}
-
-static int default_refs;
-
-static int fsck_handle_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
- const char *email, unsigned long timestamp, int tz,
- const char *message, void *cb_data)
-{
- struct object *obj;
-
- if (verbose)
- fprintf(stderr, "Checking reflog %s->%s\n",
- sha1_to_hex(osha1), sha1_to_hex(nsha1));
-
- if (!is_null_sha1(osha1)) {
- obj = lookup_object(osha1);
- if (obj) {
- obj->used = 1;
- mark_object_reachable(obj);
- }
- }
- obj = lookup_object(nsha1);
- if (obj) {
- obj->used = 1;
- mark_object_reachable(obj);
- }
- return 0;
-}
-
-static int fsck_handle_reflog(const char *logname, const unsigned char *sha1, int flag, void *cb_data)
-{
- for_each_reflog_ent(logname, fsck_handle_reflog_ent, NULL);
- return 0;
-}
-
-static int is_branch(const char *refname)
-{
- return !strcmp(refname, "HEAD") || !prefixcmp(refname, "refs/heads/");
-}
-
-static int fsck_handle_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
-{
- struct object *obj;
-
- obj = parse_object(sha1);
- if (!obj) {
- error("%s: invalid sha1 pointer %s", refname, sha1_to_hex(sha1));
- /* We'll continue with the rest despite the error.. */
- return 0;
- }
- if (obj->type != OBJ_COMMIT && is_branch(refname))
- error("%s: not a commit", refname);
- default_refs++;
- obj->used = 1;
- 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);
-
- /*
- * Not having any default heads isn't really fatal, but
- * it does mean that "--unreachable" no longer makes any
- * sense (since in this case everything will obviously
- * be unreachable by definition.
- *
- * Showing dangling objects is valid, though (as those
- * dangling objects are likely lost heads).
- *
- * So we just print a warning about it, and clear the
- * "show_unreachable" flag.
- */
- if (!default_refs) {
- fprintf(stderr, "notice: No default references\n");
- show_unreachable = 0;
- }
-}
-
-static void fsck_object_dir(const char *path)
-{
- int i;
-
- if (verbose)
- fprintf(stderr, "Checking object directory\n");
-
- for (i = 0; i < 256; i++) {
- static char dir[4096];
- sprintf(dir, "%s/%02x", path, i);
- fsck_dir(i, dir);
- }
- fsck_sha1_list();
-}
-
-static int fsck_head_link(void)
-{
- int flag;
- int null_is_error = 0;
-
- 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"))
- /* detached HEAD */
- null_is_error = 1;
- else if (prefixcmp(head_points_at, "refs/heads/"))
- return error("HEAD points to something strange (%s)",
- head_points_at);
- 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",
- head_points_at + 11);
- }
- return 0;
-}
-
-static int fsck_cache_tree(struct cache_tree *it)
-{
- int i;
- int err = 0;
-
- if (verbose)
- fprintf(stderr, "Checking cache tree\n");
-
- if (0 <= it->entry_count) {
- struct object *obj = parse_object(it->sha1);
- if (!obj) {
- error("%s: invalid sha1 pointer in cache-tree",
- sha1_to_hex(it->sha1));
- return 1;
- }
- mark_object_reachable(obj);
- obj->used = 1;
- if (obj->type != OBJ_TREE)
- err |= objerror(obj, "non-tree in cache-tree");
- }
- for (i = 0; i < it->subtree_nr; i++)
- err |= fsck_cache_tree(it->down[i]->cache_tree);
- return err;
-}
-
-static char const * const fsck_usage[] = {
- "git fsck [options] [<object>...]",
- NULL
-};
-
-static struct option fsck_opts[] = {
- OPT__VERBOSE(&verbose),
- OPT_BOOLEAN(0, "unreachable", &show_unreachable, "show unreachable objects"),
- OPT_BOOLEAN(0, "tags", &show_tags, "report tags"),
- OPT_BOOLEAN(0, "root", &show_root, "report root nodes"),
- OPT_BOOLEAN(0, "cache", &keep_cache_objects, "make index objects head nodes"),
- OPT_BOOLEAN(0, "reflogs", &include_reflogs, "make reflogs head nodes (default)"),
- OPT_BOOLEAN(0, "full", &check_full, "also consider alternate objects"),
- OPT_BOOLEAN(0, "strict", &check_strict, "enable more strict checking"),
- OPT_BOOLEAN(0, "lost-found", &write_lost_and_found,
- "write dangling objects in .git/lost-found"),
- OPT_END(),
-};
-
-int cmd_fsck(int argc, const char **argv, const char *prefix)
-{
- int i, heads;
- struct alternate_object_database *alt;
-
- errors_found = 0;
-
- argc = parse_options(argc, argv, prefix, fsck_opts, fsck_usage, 0);
- if (write_lost_and_found) {
- check_full = 1;
- include_reflogs = 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 packed_git *p;
-
- prepare_packed_git();
- for (p = packed_git; p; p = p->next)
- /* verify gives error messages itself */
- verify_pack(p);
-
- for (p = packed_git; p; p = p->next) {
- uint32_t j, num;
- if (open_pack_index(p))
- continue;
- num = p->num_objects;
- for (j = 0; j < num; j++)
- fsck_sha1(nth_packed_object_sha1(p, j));
- }
- }
-
- heads = 0;
- for (i = 0; i < argc; i++) {
- const char *arg = argv[i];
- 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_object_reachable(obj);
- heads++;
- continue;
- }
- error("invalid parameter: expected sha1, got '%s'", arg);
- }
-
- /*
- * If we've not been given any explicit head information, do the
- * default ones from .git/refs. We also consider the index file
- * in this case (ie this implies --cache).
- */
- if (!heads) {
- get_default_heads();
- keep_cache_objects = 1;
- }
-
- if (keep_cache_objects) {
- read_cache();
- for (i = 0; i < active_nr; i++) {
- unsigned int mode;
- struct blob *blob;
- struct object *obj;
-
- mode = active_cache[i]->ce_mode;
- if (S_ISGITLINK(mode))
- continue;
- blob = lookup_blob(active_cache[i]->sha1);
- if (!blob)
- continue;
- obj = &blob->object;
- obj->used = 1;
- mark_object_reachable(obj);
- }
- if (active_cache_tree)
- fsck_cache_tree(active_cache_tree);
- }
-
- check_connectivity();
- return errors_found;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 22:13:02 +0000