#endif
#endif
+const unsigned char null_sha1[20] = { 0, };
+
static unsigned int sha1_file_open_flag = O_NOATIME;
static unsigned hexval(char c)
*git_graft_file;
static void setup_git_env(void)
{
- git_dir = gitenv(GIT_DIR_ENVIRONMENT);
+ git_dir = getenv(GIT_DIR_ENVIRONMENT);
if (!git_dir)
git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
- git_object_dir = gitenv(DB_ENVIRONMENT);
+ git_object_dir = getenv(DB_ENVIRONMENT);
if (!git_object_dir) {
git_object_dir = xmalloc(strlen(git_dir) + 9);
sprintf(git_object_dir, "%s/objects", git_dir);
}
git_refs_dir = xmalloc(strlen(git_dir) + 6);
sprintf(git_refs_dir, "%s/refs", git_dir);
- git_index_file = gitenv(INDEX_ENVIRONMENT);
+ git_index_file = getenv(INDEX_ENVIRONMENT);
if (!git_index_file) {
git_index_file = xmalloc(strlen(git_dir) + 7);
sprintf(git_index_file, "%s/index", git_dir);
}
- git_graft_file = gitenv(GRAFT_ENVIRONMENT);
+ git_graft_file = getenv(GRAFT_ENVIRONMENT);
if (!git_graft_file)
git_graft_file = strdup(git_path("info/grafts"));
}
+char *get_git_dir(void)
+{
+ if (!git_dir)
+ setup_git_env();
+ return git_dir;
+}
+
char *get_object_directory(void)
{
if (!git_object_dir)
* SHA1, an extra slash for the first level indirection, and the
* terminating NUL.
*/
-static void link_alt_odb_entries(const char *alt, const char *ep, int sep)
+static void link_alt_odb_entries(const char *alt, const char *ep, int sep,
+ const char *relative_base)
{
const char *cp, *last;
struct alternate_object_database *ent;
+ int base_len = -1;
last = alt;
while (last < ep) {
int pfxlen = cp - last;
int entlen = pfxlen + 43;
+ if (*last != '/' && relative_base) {
+ /* Relative alt-odb */
+ if (base_len < 0)
+ base_len = strlen(relative_base) + 1;
+ entlen += base_len;
+ pfxlen += base_len;
+ }
ent = xmalloc(sizeof(*ent) + entlen);
*alt_odb_tail = ent;
alt_odb_tail = &(ent->next);
ent->next = NULL;
-
- memcpy(ent->base, last, pfxlen);
+ if (*last != '/' && relative_base) {
+ memcpy(ent->base, relative_base, base_len - 1);
+ ent->base[base_len - 1] = '/';
+ memcpy(ent->base + base_len,
+ last, cp - last);
+ }
+ else
+ memcpy(ent->base, last, pfxlen);
ent->name = ent->base + pfxlen + 1;
ent->base[pfxlen] = ent->base[pfxlen + 3] = '/';
ent->base[entlen-1] = 0;
struct stat st;
char *alt;
- alt = gitenv(ALTERNATE_DB_ENVIRONMENT);
+ alt = getenv(ALTERNATE_DB_ENVIRONMENT);
if (!alt) alt = "";
- sprintf(path, "%s/info/alternates", get_object_directory());
if (alt_odb_tail)
return;
alt_odb_tail = &alt_odb_list;
- link_alt_odb_entries(alt, alt + strlen(alt), ':');
+ link_alt_odb_entries(alt, alt + strlen(alt), ':', NULL);
+ sprintf(path, "%s/info/alternates", get_object_directory());
fd = open(path, O_RDONLY);
if (fd < 0)
return;
if (map == MAP_FAILED)
return;
- link_alt_odb_entries(map, map + st.st_size, '\n');
+ link_alt_odb_entries(map, map + st.st_size, '\n',
+ get_object_directory());
munmap(map, st.st_size);
}
strcpy(type, "tag");
break;
default:
- die("corrupted pack file");
+ die("corrupted pack file %s containing object of kind %d",
+ p->pack_name, kind);
}
*store_size = 0; /* notyet */
}
strcpy(type, "tag");
break;
default:
- die("corrupted pack file");
+ die("corrupted pack file %s containing object of kind %d",
+ p->pack_name, kind);
}
if (sizep)
*sizep = size;
retval = unpack_entry_gently(entry, type, sizep);
unuse_packed_git(p);
if (!retval)
- die("corrupted pack file");
+ die("corrupted pack file %s", p->pack_name);
return retval;
}
return sha1_file_name(sha1);
}
+/*
+ * Link the tempfile to the final place, possibly creating the
+ * last directory level as you do so.
+ *
+ * Returns the errno on failure, 0 on success.
+ */
+static int link_temp_to_file(const char *tmpfile, char *filename)
+{
+ int ret;
+
+ if (!link(tmpfile, filename))
+ return 0;
+
+ /*
+ * Try to mkdir the last path component if that failed
+ * with an ENOENT.
+ *
+ * Re-try the "link()" regardless of whether the mkdir
+ * succeeds, since a race might mean that somebody
+ * else succeeded.
+ */
+ ret = errno;
+ if (ret == ENOENT) {
+ char *dir = strrchr(filename, '/');
+ if (dir) {
+ *dir = 0;
+ mkdir(filename, 0777);
+ *dir = '/';
+ if (!link(tmpfile, filename))
+ return 0;
+ ret = errno;
+ }
+ }
+ return ret;
+}
+
+/*
+ * Move the just written object into its final resting place
+ */
+int move_temp_to_file(const char *tmpfile, char *filename)
+{
+ int ret = link_temp_to_file(tmpfile, filename);
+ if (ret) {
+ /*
+ * Coda hack - coda doesn't like cross-directory links,
+ * so we fall back to a rename, which will mean that it
+ * won't be able to check collisions, but that's not a
+ * big deal.
+ *
+ * When this succeeds, we just return 0. We have nothing
+ * left to unlink.
+ */
+ if (ret == EXDEV && !rename(tmpfile, filename))
+ return 0;
+ }
+ unlink(tmpfile);
+ if (ret) {
+ if (ret != EEXIST) {
+ fprintf(stderr, "unable to write sha1 filename %s: %s", filename, strerror(ret));
+ return -1;
+ }
+ /* FIXME!!! Collision check here ? */
+ }
+
+ return 0;
+}
+
int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *returnsha1)
{
int size;
char *filename;
static char tmpfile[PATH_MAX];
unsigned char hdr[50];
- int fd, hdrlen, ret;
+ int fd, hdrlen;
/* Normally if we have it in the pack then we do not bother writing
* it out into .git/objects/??/?{38} file.
close(fd);
free(compressed);
- ret = link(tmpfile, filename);
- if (ret < 0) {
- ret = errno;
-
- /*
- * Coda hack - coda doesn't like cross-directory links,
- * so we fall back to a rename, which will mean that it
- * won't be able to check collisions, but that's not a
- * big deal.
- *
- * When this succeeds, we just return 0. We have nothing
- * left to unlink.
- */
- if (ret == EXDEV && !rename(tmpfile, filename))
- return 0;
- }
- unlink(tmpfile);
- if (ret) {
- if (ret != EEXIST) {
- fprintf(stderr, "unable to write sha1 filename %s: %s", filename, strerror(ret));
- return -1;
- }
- /* FIXME!!! Collision check here ? */
- }
-
- return 0;
+ return move_temp_to_file(tmpfile, filename);
}
int write_sha1_to_fd(int fd, const unsigned char *sha1)
int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
size_t bufsize, size_t *bufposn)
{
- char *filename = sha1_file_name(sha1);
-
+ char tmpfile[PATH_MAX];
int local;
z_stream stream;
unsigned char real_sha1[20];
int ret;
SHA_CTX c;
- local = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
+ snprintf(tmpfile, sizeof(tmpfile), "%s/obj_XXXXXX", get_object_directory());
+ local = mkstemp(tmpfile);
if (local < 0)
- return error("Couldn't open %s\n", filename);
+ return error("Couldn't open %s for %s\n", tmpfile, sha1_to_hex(sha1));
memset(&stream, 0, sizeof(stream));
size = read(fd, buffer + *bufposn, bufsize - *bufposn);
if (size <= 0) {
close(local);
- unlink(filename);
+ unlink(tmpfile);
if (!size)
return error("Connection closed?");
perror("Reading from connection");
close(local);
SHA1_Final(real_sha1, &c);
if (ret != Z_STREAM_END) {
- unlink(filename);
+ unlink(tmpfile);
return error("File %s corrupted", sha1_to_hex(sha1));
}
if (memcmp(sha1, real_sha1, 20)) {
- unlink(filename);
+ unlink(tmpfile);
return error("File %s has bad hash\n", sha1_to_hex(sha1));
}
-
- return 0;
+
+ return move_temp_to_file(tmpfile, sha1_file_name(sha1));
}
int has_pack_index(const unsigned char *sha1)
munmap(buf, size);
return ret;
}
+
+int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object)
+{
+ int fd;
+ char *target;
+
+ switch (st->st_mode & S_IFMT) {
+ case S_IFREG:
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ return error("open(\"%s\"): %s", path,
+ strerror(errno));
+ if (index_fd(sha1, fd, st, write_object, NULL) < 0)
+ return error("%s: failed to insert into database",
+ path);
+ break;
+ case S_IFLNK:
+ target = xmalloc(st->st_size+1);
+ if (readlink(path, target, st->st_size+1) != st->st_size) {
+ char *errstr = strerror(errno);
+ free(target);
+ return error("readlink(\"%s\"): %s", path,
+ errstr);
+ }
+ if (!write_object) {
+ unsigned char hdr[50];
+ int hdrlen;
+ write_sha1_file_prepare(target, st->st_size, "blob",
+ sha1, hdr, &hdrlen);
+ } else if (write_sha1_file(target, st->st_size, "blob", sha1))
+ return error("%s: failed to insert into database",
+ path);
+ free(target);
+ break;
+ default:
+ return error("%s: unsupported file type", path);
+ }
+ return 0;
+}