git/fsck-cache.c
Linus Torvalds ab7df1874d fsck-cache: show root objects only with "--root"
This makes the default fsck behaviour be quiet for a repository
that doesn't have any problems. Which is good.
2005-04-25 16:34:13 -07:00

250 lines
5.2 KiB
C

#include "cache.h"
#include <sys/types.h>
#include <dirent.h>
#include "commit.h"
#include "tree.h"
#include "blob.h"
#define REACHABLE 0x0001
static int show_root = 0;
static int show_tags = 0;
static int show_unreachable = 0;
static unsigned char head_sha1[20];
static void check_connectivity(void)
{
int i;
/* Look up all the requirements, warn about missing objects.. */
for (i = 0; i < nr_objs; i++) {
struct object *obj = objs[i];
if (show_unreachable && !(obj->flags & REACHABLE)) {
printf("unreachable %s %s\n", obj->type, sha1_to_hex(obj->sha1));
continue;
}
if (!obj->parsed) {
printf("missing %s %s\n", obj->type,
sha1_to_hex(obj->sha1));
}
if (!obj->used) {
printf("dangling %s %s\n", obj->type,
sha1_to_hex(obj->sha1));
}
}
}
static int fsck_tree(unsigned char *sha1, void *data, unsigned long size)
{
struct tree *item = lookup_tree(sha1);
if (parse_tree(item))
return -1;
if (item->has_full_path) {
fprintf(stderr, "warning: fsck-cache: tree %s "
"has full pathnames in it\n", sha1_to_hex(sha1));
}
return 0;
}
static int fsck_commit(unsigned char *sha1, void *data, unsigned long size)
{
struct commit *commit = lookup_commit(sha1);
if (parse_commit(commit))
return -1;
if (!commit->tree)
return -1;
if (!commit->parents && show_root)
printf("root %s\n", sha1_to_hex(sha1));
if (!commit->date)
printf("bad commit date in %s\n", sha1_to_hex(sha1));
return 0;
}
static int fsck_blob(unsigned char *sha1, void *data, unsigned long size)
{
struct blob *blob = lookup_blob(sha1);
blob->object.parsed = 1;
return 0;
}
static int fsck_tag(unsigned char *sha1, void *data, unsigned long size)
{
int typelen, taglen;
unsigned char object[20];
char object_hex[60];
const char *type_line, *tag_line, *sig_line;
if (size < 64)
return -1;
if (memcmp("object ", data, 7) || get_sha1_hex(data + 7, object))
return -1;
type_line = data + 48;
if (memcmp("\ntype ", type_line-1, 6))
return -1;
tag_line = strchr(type_line, '\n');
if (!tag_line || memcmp("tag ", ++tag_line, 4))
return -1;
sig_line = strchr(tag_line, '\n');
if (!sig_line)
return -1;
sig_line++;
typelen = tag_line - type_line - strlen("type \n");
if (typelen >= 20)
return -1;
taglen = sig_line - tag_line - strlen("tag \n");
if (!show_tags)
return 0;
strcpy(object_hex, sha1_to_hex(object));
printf("tagged %.*s %s (%.*s) in %s\n",
typelen, type_line + 5,
object_hex,
taglen, tag_line + 4,
sha1_to_hex(sha1));
return 0;
}
static int fsck_entry(unsigned char *sha1, char *tag, void *data,
unsigned long size)
{
if (!strcmp(tag, "blob")) {
if (fsck_blob(sha1, data, size) < 0)
return -1;
} else if (!strcmp(tag, "tree")) {
if (fsck_tree(sha1, data, size) < 0)
return -1;
} else if (!strcmp(tag, "commit")) {
if (fsck_commit(sha1, data, size) < 0)
return -1;
} else if (!strcmp(tag, "tag")) {
if (fsck_tag(sha1, data, size) < 0)
return -1;
} else
return -1;
return 0;
}
static int fsck_name(char *hex)
{
unsigned char sha1[20];
if (!get_sha1_hex(hex, sha1)) {
unsigned long mapsize;
void *map = map_sha1_file(sha1, &mapsize);
if (map) {
char type[100];
unsigned long size;
void *buffer = unpack_sha1_file(map, mapsize, type, &size);
if (!buffer)
return -1;
if (check_sha1_signature(sha1, buffer, size, type) < 0)
printf("sha1 mismatch %s\n", sha1_to_hex(sha1));
munmap(map, mapsize);
if (!fsck_entry(sha1, type, buffer, size))
return 0;
}
}
return -1;
}
static int fsck_dir(int i, char *path)
{
DIR *dir = opendir(path);
struct dirent *de;
if (!dir) {
return error("missing sha1 directory '%s'", path);
}
while ((de = readdir(dir)) != NULL) {
char name[100];
int len = strlen(de->d_name);
switch (len) {
case 2:
if (de->d_name[1] != '.')
break;
case 1:
if (de->d_name[0] != '.')
break;
continue;
case 38:
sprintf(name, "%02x", i);
memcpy(name+2, de->d_name, len+1);
if (!fsck_name(name))
continue;
}
fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name);
}
closedir(dir);
return 0;
}
int main(int argc, char **argv)
{
int i, heads;
char *sha1_dir;
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (!strcmp(arg, "--unreachable")) {
show_unreachable = 1;
continue;
}
if (!strcmp(arg, "--tags")) {
show_tags = 1;
continue;
}
if (!strcmp(arg, "--root")) {
show_root = 1;
continue;
}
if (*arg == '-')
usage("fsck-cache [--tags] [[--unreachable] <head-sha1>*]");
}
sha1_dir = getenv(DB_ENVIRONMENT) ? : DEFAULT_DB_ENVIRONMENT;
for (i = 0; i < 256; i++) {
static char dir[4096];
sprintf(dir, "%s/%02x", sha1_dir, i);
fsck_dir(i, dir);
}
heads = 0;
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (*arg == '-')
continue;
if (!get_sha1_hex(arg, head_sha1)) {
struct object *obj = &lookup_commit(head_sha1)->object;
obj->used = 1;
mark_reachable(obj, REACHABLE);
heads++;
continue;
}
error("expected sha1, got %s", arg);
}
if (!heads) {
if (show_unreachable) {
fprintf(stderr, "unable to do reachability without a head\n");
show_unreachable = 0;
}
fprintf(stderr, "expect dangling commits - potential heads - due to lack of head information\n");
}
check_connectivity();
return 0;
}