static inline uintmax_t sz_fmt(size_t s) { return s; }
const unsigned char null_sha1[20];
+const struct object_id null_oid;
/*
* This is meant to hold a *small* number of objects that you would
* provided by the caller. which should be "pack" or "idx".
*/
static char *sha1_get_pack_name(const unsigned char *sha1,
- char **name, char **base, const char *which)
+ struct strbuf *buf,
+ const char *which)
{
- static const char hex[] = "0123456789abcdef";
- char *buf;
- int i;
-
- if (!*base) {
- const char *sha1_file_directory = get_object_directory();
- int len = strlen(sha1_file_directory);
- *base = xmalloc(len + 60);
- sprintf(*base, "%s/pack/pack-1234567890123456789012345678901234567890.%s",
- sha1_file_directory, which);
- *name = *base + len + 11;
- }
-
- buf = *name;
-
- for (i = 0; i < 20; i++) {
- unsigned int val = *sha1++;
- *buf++ = hex[val >> 4];
- *buf++ = hex[val & 0xf];
- }
-
- return *base;
+ strbuf_reset(buf);
+ strbuf_addf(buf, "%s/pack/pack-%s.%s", get_object_directory(),
+ sha1_to_hex(sha1), which);
+ return buf->buf;
}
char *sha1_pack_name(const unsigned char *sha1)
{
- static char *name, *base;
-
- return sha1_get_pack_name(sha1, &name, &base, "pack");
+ static struct strbuf buf = STRBUF_INIT;
+ return sha1_get_pack_name(sha1, &buf, "pack");
}
char *sha1_pack_index_name(const unsigned char *sha1)
{
- static char *name, *base;
-
- return sha1_get_pack_name(sha1, &name, &base, "idx");
+ static struct strbuf buf = STRBUF_INIT;
+ return sha1_get_pack_name(sha1, &buf, "idx");
}
struct alternate_object_database *alt_odb_list;
{
struct alternate_object_database *ent;
struct alternate_object_database *alt;
- int pfxlen, entlen;
+ size_t pfxlen, entlen;
struct strbuf pathbuf = STRBUF_INIT;
if (!is_absolute_path(entry) && relative_base) {
while (pfxlen && pathbuf.buf[pfxlen-1] == '/')
pfxlen -= 1;
- entlen = pfxlen + 43; /* '/' + 2 hex + '/' + 38 hex + NUL */
- ent = xmalloc(sizeof(*ent) + entlen);
+ entlen = st_add(pfxlen, 43); /* '/' + 2 hex + '/' + 38 hex + NUL */
+ ent = xmalloc(st_add(sizeof(*ent), entlen));
memcpy(ent->base, pathbuf.buf, pfxlen);
strbuf_release(&pathbuf);
void add_to_alternates_file(const char *reference)
{
struct lock_file *lock = xcalloc(1, sizeof(struct lock_file));
- int fd = hold_lock_file_for_append(lock, git_path("objects/info/alternates"), LOCK_DIE_ON_ERROR);
- const char *alt = mkpath("%s\n", reference);
- write_or_die(fd, alt, strlen(alt));
- if (commit_lock_file(lock))
- die("could not close alternates file");
- if (alt_odb_tail)
- link_alt_odb_entries(alt, strlen(alt), '\n', NULL, 0);
+ char *alts = git_pathdup("objects/info/alternates");
+ FILE *in, *out;
+
+ hold_lock_file_for_update(lock, alts, LOCK_DIE_ON_ERROR);
+ out = fdopen_lock_file(lock, "w");
+ if (!out)
+ die_errno("unable to fdopen alternates lockfile");
+
+ in = fopen(alts, "r");
+ if (in) {
+ struct strbuf line = STRBUF_INIT;
+ int found = 0;
+
+ while (strbuf_getline(&line, in) != EOF) {
+ if (!strcmp(reference, line.buf)) {
+ found = 1;
+ break;
+ }
+ fprintf_or_die(out, "%s\n", line.buf);
+ }
+
+ strbuf_release(&line);
+ fclose(in);
+
+ if (found) {
+ rollback_lock_file(lock);
+ lock = NULL;
+ }
+ }
+ else if (errno != ENOENT)
+ die_errno("unable to read alternates file");
+
+ if (lock) {
+ fprintf_or_die(out, "%s\n", reference);
+ if (commit_lock_file(lock))
+ die_errno("unable to move new alternates file into place");
+ if (alt_odb_tail)
+ link_alt_odb_entries(reference, strlen(reference), '\n', NULL, 0);
+ }
+ free(alts);
}
int foreach_alt_odb(alt_odb_fn fn, void *cb)
int open_pack_index(struct packed_git *p)
{
char *idx_name;
+ size_t len;
int ret;
if (p->index_data)
return 0;
- idx_name = xstrdup(p->pack_name);
- strcpy(idx_name + strlen(idx_name) - strlen(".pack"), ".idx");
+ if (!strip_suffix(p->pack_name, ".pack", &len))
+ die("BUG: pack_name does not end in .pack");
+ idx_name = xstrfmt("%.*s.idx", (int)len, p->pack_name);
ret = check_packed_git_idx(idx_name, p);
free(idx_name);
return ret;
}
}
+static int close_pack_fd(struct packed_git *p)
+{
+ if (p->pack_fd < 0)
+ return 0;
+
+ close(p->pack_fd);
+ pack_open_fds--;
+ p->pack_fd = -1;
+
+ return 1;
+}
+
+static void close_pack(struct packed_git *p)
+{
+ close_pack_windows(p);
+ close_pack_fd(p);
+ close_pack_index(p);
+}
+
+void close_all_packs(void)
+{
+ struct packed_git *p;
+
+ for (p = packed_git; p; p = p->next)
+ if (p->do_not_close)
+ die("BUG! Want to close pack marked 'do-not-close'");
+ else
+ close_pack(p);
+}
+
+
/*
* The LRU pack is the one with the oldest MRU window, preferring packs
* with no used windows, or the oldest mtime if it has no windows allocated.
find_lru_pack(p, &lru_p, &mru_w, &accept_windows_inuse);
}
- if (lru_p) {
- close(lru_p->pack_fd);
- pack_open_fds--;
- lru_p->pack_fd = -1;
- return 1;
- }
+ if (lru_p)
+ return close_pack_fd(lru_p);
return 0;
}
p = *pp;
if (strcmp(pack_name, p->pack_name) == 0) {
clear_delta_base_cache();
- close_pack_windows(p);
- if (p->pack_fd != -1) {
- close(p->pack_fd);
- pack_open_fds--;
- }
- close_pack_index(p);
+ close_pack(p);
free(p->bad_object_sha1);
*pp = p->next;
if (last_found_pack == p)
{
if (!open_packed_git_1(p))
return 0;
- if (p->pack_fd != -1) {
- close(p->pack_fd);
- pack_open_fds--;
- p->pack_fd = -1;
- }
+ close_pack_fd(p);
return -1;
}
die("packfile %s cannot be accessed", p->pack_name);
if (offset > (p->pack_size - 20))
die("offset beyond end of packfile (truncated pack?)");
+ if (offset < 0)
+ die(_("offset before end of packfile (broken .idx?)"));
if (!win || !in_window(win, offset)) {
if (win)
p->pack_name,
strerror(errno));
if (!win->offset && win->len == p->pack_size
- && !p->do_not_close) {
- close(p->pack_fd);
- pack_open_fds--;
- p->pack_fd = -1;
- }
+ && !p->do_not_close)
+ close_pack_fd(p);
pack_mmap_calls++;
pack_open_windows++;
if (pack_mapped > peak_pack_mapped)
static struct packed_git *alloc_packed_git(int extra)
{
- struct packed_git *p = xmalloc(sizeof(*p) + extra);
+ struct packed_git *p = xmalloc(st_add(sizeof(*p), extra));
memset(p, 0, sizeof(*p));
p->pack_fd = -1;
return p;
release_pack_memory(size);
}
-struct packed_git *add_packed_git(const char *path, int path_len, int local)
+struct packed_git *add_packed_git(const char *path, size_t path_len, int local)
{
static int have_set_try_to_free_routine;
struct stat st;
- struct packed_git *p = alloc_packed_git(path_len + 2);
+ size_t alloc;
+ struct packed_git *p;
if (!have_set_try_to_free_routine) {
have_set_try_to_free_routine = 1;
* Make sure a corresponding .pack file exists and that
* the index looks sane.
*/
- path_len -= strlen(".idx");
- if (path_len < 1) {
- free(p);
+ if (!strip_suffix_mem(path, &path_len, ".idx"))
return NULL;
- }
+
+ /*
+ * ".pack" is long enough to hold any suffix we're adding (and
+ * the use xsnprintf double-checks that)
+ */
+ alloc = st_add3(path_len, strlen(".pack"), 1);
+ p = alloc_packed_git(alloc);
memcpy(p->pack_name, path, path_len);
- strcpy(p->pack_name + path_len, ".keep");
+ xsnprintf(p->pack_name + path_len, alloc - path_len, ".keep");
if (!access(p->pack_name, F_OK))
p->pack_keep = 1;
- strcpy(p->pack_name + path_len, ".pack");
+ xsnprintf(p->pack_name + path_len, alloc - path_len, ".pack");
if (stat(p->pack_name, &st) || !S_ISREG(st.st_mode)) {
free(p);
return NULL;
struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path)
{
const char *path = sha1_pack_name(sha1);
- struct packed_git *p = alloc_packed_git(strlen(path) + 1);
+ size_t alloc = st_add(strlen(path), 1);
+ struct packed_git *p = alloc_packed_git(alloc);
- strcpy(p->pack_name, path);
+ memcpy(p->pack_name, path, alloc); /* includes NUL */
hashcpy(p->sha1, sha1);
if (check_packed_git_idx(idx_path, p)) {
free(p);
packed_git = pack;
}
-void (*report_garbage)(const char *desc, const char *path);
+void (*report_garbage)(unsigned seen_bits, const char *path);
static void report_helper(const struct string_list *list,
int seen_bits, int first, int last)
{
- const char *msg;
- switch (seen_bits) {
- case 0:
- msg = "no corresponding .idx or .pack";
- break;
- case 1:
- msg = "no corresponding .idx";
- break;
- case 2:
- msg = "no corresponding .pack";
- break;
- default:
+ if (seen_bits == (PACKDIR_FILE_PACK|PACKDIR_FILE_IDX))
return;
- }
+
for (; first < last; first++)
- report_garbage(msg, list->items[first].string);
+ report_garbage(seen_bits, list->items[first].string);
}
static void report_pack_garbage(struct string_list *list)
if (baselen == -1) {
const char *dot = strrchr(path, '.');
if (!dot) {
- report_garbage("garbage found", path);
+ report_garbage(PACKDIR_FILE_GARBAGE, path);
continue;
}
baselen = dot - path + 1;
ends_with(de->d_name, ".keep"))
string_list_append(&garbage, path.buf);
else
- report_garbage("garbage found", path.buf);
+ report_garbage(PACKDIR_FILE_GARBAGE, path.buf);
}
closedir(dir);
report_pack_garbage(&garbage);
{
unsigned i;
for (i = 0; i < p->num_bad_objects; i++)
- if (!hashcmp(sha1, p->bad_object_sha1 + 20 * i))
+ if (!hashcmp(sha1, p->bad_object_sha1 + GIT_SHA1_RAWSZ * i))
return;
- p->bad_object_sha1 = xrealloc(p->bad_object_sha1, 20 * (p->num_bad_objects + 1));
- hashcpy(p->bad_object_sha1 + 20 * p->num_bad_objects, sha1);
+ p->bad_object_sha1 = xrealloc(p->bad_object_sha1,
+ st_mult(GIT_SHA1_RAWSZ,
+ st_add(p->num_bad_objects, 1)));
+ hashcpy(p->bad_object_sha1 + GIT_SHA1_RAWSZ * p->num_bad_objects, sha1);
p->num_bad_objects++;
}
return -1;
/* Generate the header */
- hdrlen = sprintf(hdr, "%s %lu", typename(obj_type), size) + 1;
+ hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", typename(obj_type), size) + 1;
/* Sha1.. */
git_SHA1_Init(&c);
/* Push the object we're going to leave behind */
if (poi_stack_nr >= poi_stack_alloc && poi_stack == small_poi_stack) {
poi_stack_alloc = alloc_nr(poi_stack_nr);
- poi_stack = xmalloc(sizeof(off_t)*poi_stack_alloc);
+ ALLOC_ARRAY(poi_stack, poi_stack_alloc);
memcpy(poi_stack, small_poi_stack, sizeof(off_t)*poi_stack_nr);
} else {
ALLOC_GROW(poi_stack, poi_stack_nr+1, poi_stack_alloc);
{
unsigned long hash;
- hash = (unsigned long)p + (unsigned long)base_offset;
+ hash = (unsigned long)(intptr_t)p + (unsigned long)base_offset;
hash += (hash >> 8) + (hash >> 16);
return hash % MAX_DELTA_CACHE;
}
if (delta_stack_nr >= delta_stack_alloc
&& delta_stack == small_delta_stack) {
delta_stack_alloc = alloc_nr(delta_stack_nr);
- delta_stack = xmalloc(sizeof(*delta_stack)*delta_stack_alloc);
+ ALLOC_ARRAY(delta_stack, delta_stack_alloc);
memcpy(delta_stack, small_delta_stack,
sizeof(*delta_stack)*delta_stack_nr);
} else {
}
}
+void check_pack_index_ptr(const struct packed_git *p, const void *vptr)
+{
+ const unsigned char *ptr = vptr;
+ const unsigned char *start = p->index_data;
+ const unsigned char *end = start + p->index_size;
+ if (ptr < start)
+ die(_("offset before start of pack index for %s (corrupt index?)"),
+ p->pack_name);
+ /* No need to check for underflow; .idx files must be at least 8 bytes */
+ if (ptr >= end - 8)
+ die(_("offset beyond end of pack index for %s (truncated index?)"),
+ p->pack_name);
+}
+
off_t nth_packed_object_offset(const struct packed_git *p, uint32_t n)
{
const unsigned char *index = p->index_data;
if (!(off & 0x80000000))
return off;
index += p->num_objects * 4 + (off & 0x7fffffff) * 8;
+ check_pack_index_ptr(p, index);
return (((uint64_t)ntohl(*((uint32_t *)(index + 0)))) << 32) |
ntohl(*((uint32_t *)(index + 4)));
}
git_SHA_CTX c;
/* Generate the header */
- *hdrlen = sprintf(hdr, "%s %lu", type, len)+1;
+ *hdrlen = xsnprintf(hdr, *hdrlen, "%s %lu", type, len)+1;
/* Sha1.. */
git_SHA1_Init(&c);
/*
* Move the just written object into its final resting place.
- * NEEDSWORK: this should be renamed to finalize_temp_file() as
- * "moving" is only a part of what it does, when no patch between
- * master to pu changes the call sites of this function.
*/
-int move_temp_to_file(const char *tmpfile, const char *filename)
+int finalize_object_file(const char *tmpfile, const char *filename)
{
int ret = 0;
unsigned char *sha1)
{
char hdr[32];
- int hdrlen;
+ int hdrlen = sizeof(hdr);
write_sha1_file_prepare(buf, len, type, sha1, hdr, &hdrlen);
return 0;
}
* We want to avoid cross-directory filename renames, because those
* can have problems on various filesystems (FAT, NFS, Coda).
*/
-static int create_tmpfile(char *buffer, size_t bufsiz, const char *filename)
+static int create_tmpfile(struct strbuf *tmp, const char *filename)
{
int fd, dirlen = directory_size(filename);
- if (dirlen + 20 > bufsiz) {
- errno = ENAMETOOLONG;
- return -1;
- }
- memcpy(buffer, filename, dirlen);
- strcpy(buffer + dirlen, "tmp_obj_XXXXXX");
- fd = git_mkstemp_mode(buffer, 0444);
+ strbuf_reset(tmp);
+ strbuf_add(tmp, filename, dirlen);
+ strbuf_addstr(tmp, "tmp_obj_XXXXXX");
+ fd = git_mkstemp_mode(tmp->buf, 0444);
if (fd < 0 && dirlen && errno == ENOENT) {
- /* Make sure the directory exists */
- memcpy(buffer, filename, dirlen);
- buffer[dirlen-1] = 0;
- if (mkdir(buffer, 0777) && errno != EEXIST)
+ /*
+ * Make sure the directory exists; note that the contents
+ * of the buffer are undefined after mkstemp returns an
+ * error, so we have to rewrite the whole buffer from
+ * scratch.
+ */
+ strbuf_reset(tmp);
+ strbuf_add(tmp, filename, dirlen - 1);
+ if (mkdir(tmp->buf, 0777) && errno != EEXIST)
return -1;
- if (adjust_shared_perm(buffer))
+ if (adjust_shared_perm(tmp->buf))
return -1;
/* Try again */
- strcpy(buffer + dirlen - 1, "/tmp_obj_XXXXXX");
- fd = git_mkstemp_mode(buffer, 0444);
+ strbuf_addstr(tmp, "/tmp_obj_XXXXXX");
+ fd = git_mkstemp_mode(tmp->buf, 0444);
}
return fd;
}
git_zstream stream;
git_SHA_CTX c;
unsigned char parano_sha1[20];
- static char tmp_file[PATH_MAX];
+ static struct strbuf tmp_file = STRBUF_INIT;
const char *filename = sha1_file_name(sha1);
- fd = create_tmpfile(tmp_file, sizeof(tmp_file), filename);
+ fd = create_tmpfile(&tmp_file, filename);
if (fd < 0) {
if (errno == EACCES)
return error("insufficient permission for adding an object to repository database %s", get_object_directory());
struct utimbuf utb;
utb.actime = mtime;
utb.modtime = mtime;
- if (utime(tmp_file, &utb) < 0)
+ if (utime(tmp_file.buf, &utb) < 0)
warning("failed utime() on %s: %s",
- tmp_file, strerror(errno));
+ tmp_file.buf, strerror(errno));
}
- return move_temp_to_file(tmp_file, filename);
+ return finalize_object_file(tmp_file.buf, filename);
}
static int freshen_loose_object(const unsigned char *sha1)
int write_sha1_file(const void *buf, unsigned long len, const char *type, unsigned char *sha1)
{
char hdr[32];
- int hdrlen;
+ int hdrlen = sizeof(hdr);
/* Normally if we have it in the pack then we do not bother writing
* it out into .git/objects/??/?{38} file.
int hdrlen, status = 0;
/* type string, SP, %lu of the length plus NUL must fit this */
- header = xmalloc(strlen(type) + 32);
+ hdrlen = strlen(type) + 32;
+ header = xmalloc(hdrlen);
write_sha1_file_prepare(buf, len, type, sha1, header, &hdrlen);
if (!(flags & HASH_WRITE_OBJECT))
buf = read_packed_sha1(sha1, &type, &len);
if (!buf)
return error("cannot read sha1_file for %s", sha1_to_hex(sha1));
- hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
+ hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", typename(type), len) + 1;
ret = write_loose_object(sha1, hdr, hdrlen, buf, len, mtime);
free(buf);
return find_pack_entry(sha1, &e);
}
+int has_object_file(const struct object_id *oid)
+{
+ return has_sha1_file(oid->hash);
+}
+
static void check_tree(const void *buf, size_t size)
{
struct tree_desc desc;
break;
}
}
- strbuf_setlen(path, baselen);
+ closedir(dir);
+ strbuf_setlen(path, baselen);
if (!r && subdir_cb)
r = subdir_cb(subdir_nr, path->buf, data);
- closedir(dir);
return r;
}