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diff --git a/sha1_file.c b/sha1_file.c
index 1cafdfa617a833ec757b481826dc62282be8f374..d949b35c3308ae5c06774da7f4fecdc84778d5eb 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
#include "commit.h"
#include "tag.h"
#include "tree.h"
+#include "tree-walk.h"
#include "refs.h"
#include "pack-revindex.h"
#include "sha1-lookup.h"
static int git_open_noatime(const char *name, struct packed_git *p);
+/*
+ * This is meant to hold a *small* number of objects that you would
+ * want read_sha1_file() to be able to return, but yet you do not want
+ * to write them into the object store (e.g. a browse-only
+ * application).
+ */
+static struct cached_object {
+ unsigned char sha1[20];
+ enum object_type type;
+ void *buf;
+ unsigned long size;
+} *cached_objects;
+static int cached_object_nr, cached_object_alloc;
+
+static struct cached_object empty_tree = {
+ EMPTY_TREE_SHA1_BIN_LITERAL,
+ OBJ_TREE,
+ "",
+ 0
+};
+
+static struct cached_object *find_cached_object(const unsigned char *sha1)
+{
+ int i;
+ struct cached_object *co = cached_objects;
+
+ for (i = 0; i < cached_object_nr; i++, co++) {
+ if (!hashcmp(co->sha1, sha1))
+ return co;
+ }
+ if (!hashcmp(sha1, empty_tree.sha1))
+ return &empty_tree;
+ return NULL;
+}
+
int safe_create_leading_directories(char *path)
{
char *pos = path + offset_1st_component(path);
@@ -1985,9 +2021,17 @@ static int sha1_loose_object_info(const unsigned char *sha1, unsigned long *size
int sha1_object_info(const unsigned char *sha1, unsigned long *sizep)
{
+ struct cached_object *co;
struct pack_entry e;
int status;
+ co = find_cached_object(sha1);
+ if (co) {
+ if (sizep)
+ *sizep = co->size;
+ return co->type;
+ }
+
if (!find_pack_entry(sha1, &e)) {
/* Most likely it's a loose object. */
status = sha1_loose_object_info(sha1, sizep);
return data;
}
-/*
- * This is meant to hold a *small* number of objects that you would
- * want read_sha1_file() to be able to return, but yet you do not want
- * to write them into the object store (e.g. a browse-only
- * application).
- */
-static struct cached_object {
- unsigned char sha1[20];
- enum object_type type;
- void *buf;
- unsigned long size;
-} *cached_objects;
-static int cached_object_nr, cached_object_alloc;
-
-static struct cached_object empty_tree = {
- EMPTY_TREE_SHA1_BIN,
- OBJ_TREE,
- "",
- 0
-};
-
-static struct cached_object *find_cached_object(const unsigned char *sha1)
-{
- int i;
- struct cached_object *co = cached_objects;
-
- for (i = 0; i < cached_object_nr; i++, co++) {
- if (!hashcmp(co->sha1, sha1))
- return co;
- }
- if (!hashcmp(sha1, empty_tree.sha1))
- return &empty_tree;
- return NULL;
-}
-
int pretend_sha1_file(void *buf, unsigned long len, enum object_type type,
unsigned char *sha1)
{
return data;
}
- if (errno != ENOENT)
+ if (errno && errno != ENOENT)
die_errno("failed to read object %s", sha1_to_hex(sha1));
/* die if we replaced an object with one that does not exist */
return has_loose_object(sha1);
}
+static void check_tree(const void *buf, size_t size)
+{
+ struct tree_desc desc;
+ struct name_entry entry;
+
+ init_tree_desc(&desc, buf, size);
+ while (tree_entry(&desc, &entry))
+ /* do nothing
+ * tree_entry() will die() on malformed entries */
+ ;
+}
+
+static void check_commit(const void *buf, size_t size)
+{
+ struct commit c;
+ memset(&c, 0, sizeof(c));
+ if (parse_commit_buffer(&c, buf, size))
+ die("corrupt commit");
+}
+
+static void check_tag(const void *buf, size_t size)
+{
+ struct tag t;
+ memset(&t, 0, sizeof(t));
+ if (parse_tag_buffer(&t, buf, size))
+ die("corrupt tag");
+}
+
static int index_mem(unsigned char *sha1, void *buf, size_t size,
- int write_object, enum object_type type, const char *path)
+ int write_object, enum object_type type,
+ const char *path, int format_check)
{
int ret, re_allocated = 0;
re_allocated = 1;
}
}
+ if (format_check) {
+ if (type == OBJ_TREE)
+ check_tree(buf, size);
+ if (type == OBJ_COMMIT)
+ check_commit(buf, size);
+ if (type == OBJ_TAG)
+ check_tag(buf, size);
+ }
if (write_object)
ret = write_sha1_file(buf, size, typename(type), sha1);
#define SMALL_FILE_SIZE (32*1024)
int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object,
- enum object_type type, const char *path)
+ enum object_type type, const char *path, int format_check)
{
int ret;
size_t size = xsize_t(st->st_size);
@@ -2512,23 +2558,25 @@ int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object,
struct strbuf sbuf = STRBUF_INIT;
if (strbuf_read(&sbuf, fd, 4096) >= 0)
ret = index_mem(sha1, sbuf.buf, sbuf.len, write_object,
- type, path);
+ type, path, format_check);
else
ret = -1;
strbuf_release(&sbuf);
} else if (!size) {
- ret = index_mem(sha1, NULL, size, write_object, type, path);
+ ret = index_mem(sha1, NULL, size, write_object, type, path,
+ format_check);
} else if (size <= SMALL_FILE_SIZE) {
char *buf = xmalloc(size);
if (size == read_in_full(fd, buf, size))
ret = index_mem(sha1, buf, size, write_object, type,
- path);
+ path, format_check);
else
ret = error("short read %s", strerror(errno));
free(buf);
} else {
void *buf = xmmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
- ret = index_mem(sha1, buf, size, write_object, type, path);
+ ret = index_mem(sha1, buf, size, write_object, type, path,
+ format_check);
munmap(buf, size);
}
close(fd);
@@ -2546,7 +2594,7 @@ int index_path(unsigned char *sha1, const char *path, struct stat *st, int write
if (fd < 0)
return error("open(\"%s\"): %s", path,
strerror(errno));
- if (index_fd(sha1, fd, st, write_object, OBJ_BLOB, path) < 0)
+ if (index_fd(sha1, fd, st, write_object, OBJ_BLOB, path, 0) < 0)
return error("%s: failed to insert into database",
path);
break;