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-rw-r--r--read-cache.c134
1 files changed, 76 insertions, 58 deletions
diff --git a/read-cache.c b/read-cache.c
index 6238df448f..65f4fe8375 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -5,6 +5,7 @@
*/
#define NO_THE_INDEX_COMPATIBILITY_MACROS
#include "cache.h"
+#include "config.h"
#include "tempfile.h"
#include "lockfile.h"
#include "cache-tree.h"
@@ -159,9 +160,9 @@ static int ce_compare_data(const struct cache_entry *ce, struct stat *st)
int fd = git_open_cloexec(ce->name, O_RDONLY);
if (fd >= 0) {
- unsigned char sha1[20];
- if (!index_fd(sha1, fd, st, OBJ_BLOB, ce->name, 0))
- match = hashcmp(sha1, ce->oid.hash);
+ struct object_id oid;
+ if (!index_fd(&oid, fd, st, OBJ_BLOB, ce->name, 0))
+ match = oidcmp(&oid, &ce->oid);
/* index_fd() closed the file descriptor already */
}
return match;
@@ -219,6 +220,7 @@ static int ce_modified_check_fs(const struct cache_entry *ce, struct stat *st)
case S_IFDIR:
if (S_ISGITLINK(ce->ce_mode))
return ce_compare_gitlink(ce) ? DATA_CHANGED : 0;
+ /* else fallthrough */
default:
return TYPE_CHANGED;
}
@@ -514,9 +516,8 @@ int remove_index_entry_at(struct index_state *istate, int pos)
istate->cache_nr--;
if (pos >= istate->cache_nr)
return 0;
- memmove(istate->cache + pos,
- istate->cache + pos + 1,
- (istate->cache_nr - pos) * sizeof(struct cache_entry *));
+ MOVE_ARRAY(istate->cache + pos, istate->cache + pos + 1,
+ istate->cache_nr - pos);
return 1;
}
@@ -689,7 +690,7 @@ int add_to_index(struct index_state *istate, const char *path, struct stat *st,
return 0;
}
if (!intent_only) {
- if (index_path(ce->oid.hash, path, st, HASH_WRITE_OBJECT)) {
+ if (index_path(&ce->oid, path, st, HASH_WRITE_OBJECT)) {
free(ce);
return error("unable to index file %s", path);
}
@@ -1499,6 +1500,7 @@ struct ondisk_cache_entry_extended {
};
/* These are only used for v3 or lower */
+#define align_padding_size(size, len) ((size + (len) + 8) & ~7) - (size + len)
#define align_flex_name(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7)
#define ondisk_cache_entry_size(len) align_flex_name(ondisk_cache_entry,len)
#define ondisk_cache_entry_extended_size(len) align_flex_name(ondisk_cache_entry_extended,len)
@@ -1894,8 +1896,7 @@ int discard_index(struct index_state *istate)
free_name_hash(istate);
cache_tree_free(&(istate->cache_tree));
istate->initialized = 0;
- free(istate->cache);
- istate->cache = NULL;
+ FREE_AND_NULL(istate->cache);
istate->cache_alloc = 0;
discard_split_index(istate);
free_untracked_cache(istate->untracked);
@@ -1922,7 +1923,7 @@ static int ce_write_flush(git_SHA_CTX *context, int fd)
unsigned int buffered = write_buffer_len;
if (buffered) {
git_SHA1_Update(context, write_buffer, buffered);
- if (write_in_full(fd, write_buffer, buffered) != buffered)
+ if (write_in_full(fd, write_buffer, buffered) < 0)
return -1;
write_buffer_len = 0;
}
@@ -1971,7 +1972,7 @@ static int ce_flush(git_SHA_CTX *context, int fd, unsigned char *sha1)
/* Flush first if not enough space for SHA1 signature */
if (left + 20 > WRITE_BUFFER_SIZE) {
- if (write_in_full(fd, write_buffer, left) != left)
+ if (write_in_full(fd, write_buffer, left) < 0)
return -1;
left = 0;
}
@@ -1980,7 +1981,7 @@ static int ce_flush(git_SHA_CTX *context, int fd, unsigned char *sha1)
git_SHA1_Final(write_buffer + left, context);
hashcpy(sha1, write_buffer + left);
left += 20;
- return (write_in_full(fd, write_buffer, left) != left) ? -1 : 0;
+ return (write_in_full(fd, write_buffer, left) < 0) ? -1 : 0;
}
static void ce_smudge_racily_clean_entry(struct cache_entry *ce)
@@ -2033,7 +2034,7 @@ static void ce_smudge_racily_clean_entry(struct cache_entry *ce)
}
/* Copy miscellaneous fields but not the name */
-static char *copy_cache_entry_to_ondisk(struct ondisk_cache_entry *ondisk,
+static void copy_cache_entry_to_ondisk(struct ondisk_cache_entry *ondisk,
struct cache_entry *ce)
{
short flags;
@@ -2057,32 +2058,35 @@ static char *copy_cache_entry_to_ondisk(struct ondisk_cache_entry *ondisk,
struct ondisk_cache_entry_extended *ondisk2;
ondisk2 = (struct ondisk_cache_entry_extended *)ondisk;
ondisk2->flags2 = htons((ce->ce_flags & CE_EXTENDED_FLAGS) >> 16);
- return ondisk2->name;
- }
- else {
- return ondisk->name;
}
}
static int ce_write_entry(git_SHA_CTX *c, int fd, struct cache_entry *ce,
- struct strbuf *previous_name)
+ struct strbuf *previous_name, struct ondisk_cache_entry *ondisk)
{
int size;
- struct ondisk_cache_entry *ondisk;
int saved_namelen = saved_namelen; /* compiler workaround */
- char *name;
int result;
+ static unsigned char padding[8] = { 0x00 };
if (ce->ce_flags & CE_STRIP_NAME) {
saved_namelen = ce_namelen(ce);
ce->ce_namelen = 0;
}
+ if (ce->ce_flags & CE_EXTENDED)
+ size = offsetof(struct ondisk_cache_entry_extended, name);
+ else
+ size = offsetof(struct ondisk_cache_entry, name);
+
if (!previous_name) {
- size = ondisk_ce_size(ce);
- ondisk = xcalloc(1, size);
- name = copy_cache_entry_to_ondisk(ondisk, ce);
- memcpy(name, ce->name, ce_namelen(ce));
+ int len = ce_namelen(ce);
+ copy_cache_entry_to_ondisk(ondisk, ce);
+ result = ce_write(c, fd, ondisk, size);
+ if (!result)
+ result = ce_write(c, fd, ce->name, len);
+ if (!result)
+ result = ce_write(c, fd, padding, align_padding_size(size, len));
} else {
int common, to_remove, prefix_size;
unsigned char to_remove_vi[16];
@@ -2095,16 +2099,14 @@ static int ce_write_entry(git_SHA_CTX *c, int fd, struct cache_entry *ce,
to_remove = previous_name->len - common;
prefix_size = encode_varint(to_remove, to_remove_vi);
- if (ce->ce_flags & CE_EXTENDED)
- size = offsetof(struct ondisk_cache_entry_extended, name);
- else
- size = offsetof(struct ondisk_cache_entry, name);
- size += prefix_size + (ce_namelen(ce) - common + 1);
-
- ondisk = xcalloc(1, size);
- name = copy_cache_entry_to_ondisk(ondisk, ce);
- memcpy(name, to_remove_vi, prefix_size);
- memcpy(name + prefix_size, ce->name + common, ce_namelen(ce) - common);
+ copy_cache_entry_to_ondisk(ondisk, ce);
+ result = ce_write(c, fd, ondisk, size);
+ if (!result)
+ result = ce_write(c, fd, to_remove_vi, prefix_size);
+ if (!result)
+ result = ce_write(c, fd, ce->name + common, ce_namelen(ce) - common);
+ if (!result)
+ result = ce_write(c, fd, padding, 1);
strbuf_splice(previous_name, common, to_remove,
ce->name + common, ce_namelen(ce) - common);
@@ -2114,8 +2116,6 @@ static int ce_write_entry(git_SHA_CTX *c, int fd, struct cache_entry *ce,
ce->ce_flags &= ~CE_STRIP_NAME;
}
- result = ce_write(c, fd, ondisk, size);
- free(ondisk);
return result;
}
@@ -2193,11 +2193,13 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
int newfd = tempfile->fd;
git_SHA_CTX c;
struct cache_header hdr;
- int i, err, removed, extended, hdr_version;
+ int i, err = 0, removed, extended, hdr_version;
struct cache_entry **cache = istate->cache;
int entries = istate->cache_nr;
struct stat st;
+ struct ondisk_cache_entry_extended ondisk;
struct strbuf previous_name_buf = STRBUF_INIT, *previous_name;
+ int drop_cache_tree = 0;
for (i = removed = extended = 0; i < entries; i++) {
if (cache[i]->ce_flags & CE_REMOVE)
@@ -2232,6 +2234,7 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
return -1;
previous_name = (hdr_version == 4) ? &previous_name_buf : NULL;
+
for (i = 0; i < entries; i++) {
struct cache_entry *ce = cache[i];
if (ce->ce_flags & CE_REMOVE)
@@ -2247,13 +2250,21 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
if (allow)
warning(msg, ce->name);
else
- return error(msg, ce->name);
+ err = error(msg, ce->name);
+
+ drop_cache_tree = 1;
}
- if (ce_write_entry(&c, newfd, ce, previous_name) < 0)
- return -1;
+ if (ce_write_entry(&c, newfd, ce, previous_name, (struct ondisk_cache_entry *)&ondisk) < 0)
+ err = -1;
+
+ if (err)
+ break;
}
strbuf_release(&previous_name_buf);
+ if (err)
+ return err;
+
/* Write extension data here */
if (!strip_extensions && istate->split_index) {
struct strbuf sb = STRBUF_INIT;
@@ -2266,7 +2277,7 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
if (err)
return -1;
}
- if (!strip_extensions && istate->cache_tree) {
+ if (!strip_extensions && !drop_cache_tree && istate->cache_tree) {
struct strbuf sb = STRBUF_INIT;
cache_tree_write(&sb, istate->cache_tree);
@@ -2301,8 +2312,11 @@ static int do_write_index(struct index_state *istate, struct tempfile *tempfile,
if (ce_flush(&c, newfd, istate->sha1))
return -1;
- if (close_tempfile(tempfile))
- return error(_("could not close '%s'"), tempfile->filename.buf);
+ if (close_tempfile_gently(tempfile)) {
+ error(_("could not close '%s'"), tempfile->filename.buf);
+ delete_tempfile(&tempfile);
+ return -1;
+ }
if (stat(tempfile->filename.buf, &st))
return -1;
istate->timestamp.sec = (unsigned int)st.st_mtime;
@@ -2326,7 +2340,7 @@ static int commit_locked_index(struct lock_file *lk)
static int do_write_locked_index(struct index_state *istate, struct lock_file *lock,
unsigned flags)
{
- int ret = do_write_index(istate, &lock->tempfile, 0);
+ int ret = do_write_index(istate, lock->tempfile, 0);
if (ret)
return ret;
assert((flags & (COMMIT_LOCK | CLOSE_LOCK)) !=
@@ -2334,7 +2348,7 @@ static int do_write_locked_index(struct index_state *istate, struct lock_file *l
if (flags & COMMIT_LOCK)
return commit_locked_index(lock);
else if (flags & CLOSE_LOCK)
- return close_lock_file(lock);
+ return close_lock_file_gently(lock);
else
return ret;
}
@@ -2409,34 +2423,33 @@ static int clean_shared_index_files(const char *current_hex)
return 0;
}
-static struct tempfile temporary_sharedindex;
-
static int write_shared_index(struct index_state *istate,
struct lock_file *lock, unsigned flags)
{
+ struct tempfile *temp;
struct split_index *si = istate->split_index;
- int fd, ret;
+ int ret;
- fd = mks_tempfile(&temporary_sharedindex, git_path("sharedindex_XXXXXX"));
- if (fd < 0) {
+ temp = mks_tempfile(git_path("sharedindex_XXXXXX"));
+ if (!temp) {
hashclr(si->base_sha1);
return do_write_locked_index(istate, lock, flags);
}
move_cache_to_base_index(istate);
- ret = do_write_index(si->base, &temporary_sharedindex, 1);
+ ret = do_write_index(si->base, temp, 1);
if (ret) {
- delete_tempfile(&temporary_sharedindex);
+ delete_tempfile(&temp);
return ret;
}
- ret = adjust_shared_perm(get_tempfile_path(&temporary_sharedindex));
+ ret = adjust_shared_perm(get_tempfile_path(temp));
if (ret) {
int save_errno = errno;
- error("cannot fix permission bits on %s", get_tempfile_path(&temporary_sharedindex));
- delete_tempfile(&temporary_sharedindex);
+ error("cannot fix permission bits on %s", get_tempfile_path(temp));
+ delete_tempfile(&temp);
errno = save_errno;
return ret;
}
- ret = rename_tempfile(&temporary_sharedindex,
+ ret = rename_tempfile(&temp,
git_path("sharedindex.%s", sha1_to_hex(si->base->sha1)));
if (!ret) {
hashcpy(si->base_sha1, si->base->sha1);
@@ -2614,8 +2627,7 @@ void *read_blob_data_from_index(const struct index_state *istate,
void stat_validity_clear(struct stat_validity *sv)
{
- free(sv->sd);
- sv->sd = NULL;
+ FREE_AND_NULL(sv->sd);
}
int stat_validity_check(struct stat_validity *sv, const char *path)
@@ -2641,3 +2653,9 @@ void stat_validity_update(struct stat_validity *sv, int fd)
fill_stat_data(sv->sd, &st);
}
}
+
+void move_index_extensions(struct index_state *dst, struct index_state *src)
+{
+ dst->untracked = src->untracked;
+ src->untracked = NULL;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-26 10:23:08 +0000