#include "commit.h"
#include "tag.h"
#include "fsck.h"
+#include "refs.h"
#include "utf8.h"
static int fsck_walk_tree(struct tree *tree, fsck_walk_func walk, void *data)
return retval;
}
+static int require_end_of_header(const void *data, unsigned long size,
+ struct object *obj, fsck_error error_func)
+{
+ const char *buffer = (const char *)data;
+ unsigned long i;
+
+ for (i = 0; i < size; i++) {
+ switch (buffer[i]) {
+ case '\0':
+ return error_func(obj, FSCK_ERROR,
+ "unterminated header: NUL at offset %d", i);
+ case '\n':
+ if (i + 1 < size && buffer[i + 1] == '\n')
+ return 0;
+ }
+ }
+
+ return error_func(obj, FSCK_ERROR, "unterminated header");
+}
+
static int fsck_ident(const char **ident, struct object *obj, fsck_error error_func)
{
char *end;
}
static int fsck_commit_buffer(struct commit *commit, const char *buffer,
- fsck_error error_func)
+ unsigned long size, fsck_error error_func)
{
unsigned char tree_sha1[20], sha1[20];
struct commit_graft *graft;
unsigned parent_count, parent_line_count = 0;
int err;
+ if (require_end_of_header(buffer, size, &commit->object, error_func))
+ return -1;
+
if (!skip_prefix(buffer, "tree ", &buffer))
return error_func(&commit->object, FSCK_ERROR, "invalid format - expected 'tree' line");
if (get_sha1_hex(buffer, tree_sha1) || buffer[40] != '\n')
return 0;
}
-static int fsck_commit(struct commit *commit, fsck_error error_func)
+static int fsck_commit(struct commit *commit, const char *data,
+ unsigned long size, fsck_error error_func)
{
- const char *buffer = get_commit_buffer(commit, NULL);
- int ret = fsck_commit_buffer(commit, buffer, error_func);
- unuse_commit_buffer(commit, buffer);
+ const char *buffer = data ? data : get_commit_buffer(commit, &size);
+ int ret = fsck_commit_buffer(commit, buffer, size, error_func);
+ if (!data)
+ unuse_commit_buffer(commit, buffer);
return ret;
}
-static int fsck_tag(struct tag *tag, fsck_error error_func)
+static int fsck_tag_buffer(struct tag *tag, const char *data,
+ unsigned long size, fsck_error error_func)
+{
+ unsigned char sha1[20];
+ int ret = 0;
+ const char *buffer;
+ char *to_free = NULL, *eol;
+ struct strbuf sb = STRBUF_INIT;
+
+ if (data)
+ buffer = data;
+ else {
+ enum object_type type;
+
+ buffer = to_free =
+ read_sha1_file(tag->object.sha1, &type, &size);
+ if (!buffer)
+ return error_func(&tag->object, FSCK_ERROR,
+ "cannot read tag object");
+
+ if (type != OBJ_TAG) {
+ ret = error_func(&tag->object, FSCK_ERROR,
+ "expected tag got %s",
+ typename(type));
+ goto done;
+ }
+ }
+
+ if (require_end_of_header(buffer, size, &tag->object, error_func))
+ goto done;
+
+ if (!skip_prefix(buffer, "object ", &buffer)) {
+ ret = error_func(&tag->object, FSCK_ERROR, "invalid format - expected 'object' line");
+ goto done;
+ }
+ if (get_sha1_hex(buffer, sha1) || buffer[40] != '\n') {
+ ret = error_func(&tag->object, FSCK_ERROR, "invalid 'object' line format - bad sha1");
+ goto done;
+ }
+ buffer += 41;
+
+ if (!skip_prefix(buffer, "type ", &buffer)) {
+ ret = error_func(&tag->object, FSCK_ERROR, "invalid format - expected 'type' line");
+ goto done;
+ }
+ eol = strchr(buffer, '\n');
+ if (!eol) {
+ ret = error_func(&tag->object, FSCK_ERROR, "invalid format - unexpected end after 'type' line");
+ goto done;
+ }
+ if (type_from_string_gently(buffer, eol - buffer, 1) < 0)
+ ret = error_func(&tag->object, FSCK_ERROR, "invalid 'type' value");
+ if (ret)
+ goto done;
+ buffer = eol + 1;
+
+ if (!skip_prefix(buffer, "tag ", &buffer)) {
+ ret = error_func(&tag->object, FSCK_ERROR, "invalid format - expected 'tag' line");
+ goto done;
+ }
+ eol = strchr(buffer, '\n');
+ if (!eol) {
+ ret = error_func(&tag->object, FSCK_ERROR, "invalid format - unexpected end after 'type' line");
+ goto done;
+ }
+ strbuf_addf(&sb, "refs/tags/%.*s", (int)(eol - buffer), buffer);
+ if (check_refname_format(sb.buf, 0))
+ error_func(&tag->object, FSCK_WARN, "invalid 'tag' name: %.*s",
+ (int)(eol - buffer), buffer);
+ buffer = eol + 1;
+
+ if (!skip_prefix(buffer, "tagger ", &buffer))
+ /* early tags do not contain 'tagger' lines; warn only */
+ error_func(&tag->object, FSCK_WARN, "invalid format - expected 'tagger' line");
+ else
+ ret = fsck_ident(&buffer, &tag->object, error_func);
+
+done:
+ strbuf_release(&sb);
+ free(to_free);
+ return ret;
+}
+
+static int fsck_tag(struct tag *tag, const char *data,
+ unsigned long size, fsck_error error_func)
{
struct object *tagged = tag->tagged;
if (!tagged)
return error_func(&tag->object, FSCK_ERROR, "could not load tagged object");
- return 0;
+
+ return fsck_tag_buffer(tag, data, size, error_func);
}
-int fsck_object(struct object *obj, int strict, fsck_error error_func)
+int fsck_object(struct object *obj, void *data, unsigned long size,
+ int strict, fsck_error error_func)
{
if (!obj)
return error_func(obj, FSCK_ERROR, "no valid object to fsck");
if (obj->type == OBJ_TREE)
return fsck_tree((struct tree *) obj, strict, error_func);
if (obj->type == OBJ_COMMIT)
- return fsck_commit((struct commit *) obj, error_func);
+ return fsck_commit((struct commit *) obj, (const char *) data,
+ size, error_func);
if (obj->type == OBJ_TAG)
- return fsck_tag((struct tag *) obj, error_func);
+ return fsck_tag((struct tag *) obj, (const char *) data,
+ size, error_func);
return error_func(obj, FSCK_ERROR, "unknown type '%d' (internal fsck error)",
obj->type);