close_lock_file(): exit (successfully) if file is already closed

diff --git a/fsck.c b/fsck.c
index dd77628958c0cfa66c59f4c7c66277da0dc22b05..2fffa434a5763abb6d7895ee8c7582307766ee62 100644 (file)
--- a/fsck.c
+++ b/fsck.c
@@ -6,6 +6,7 @@
 #include "commit.h"
 #include "tag.h"
 #include "fsck.h"
+#include "refs.h"
 
 static int fsck_walk_tree(struct tree *tree, fsck_walk_func walk, void *data)
 {
@@ -237,6 +238,26 @@ static int fsck_tree(struct tree *item, int strict, fsck_error error_func)
        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;
@@ -284,6 +305,9 @@ static int fsck_commit_buffer(struct commit *commit, const char *buffer,
        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')
@@ -332,6 +356,88 @@ static int fsck_commit(struct commit *commit, const char *data,
        return ret;
 }
 
+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", 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)
 {
@@ -339,7 +445,8 @@ static int fsck_tag(struct tag *tag, const char *data,
 
        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, void *data, unsigned long size,