Fix missing return values and some error tests for empty index files

Patches from Dave Jones and Ingo Molnar, but since I don't have any
infrastructure in place to use the old patch applicator scripts I
am trying to build up, I ended up fixing the thing by hand instead.

Credit where credit is due, though. Nice to see that people are
taking a look at the project even in this early stage.

diff --git a/cache.h b/cache.h
index 864f70b..900824a 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -56,7 +56,7 @@ struct cache_entry {
        unsigned int st_size;
        unsigned char sha1[20];
        unsigned short namelen;
-       unsigned char name[0];
+       char name[0];
 };
 
 const char *sha1_file_directory;

diff --git a/fsck-cache.c b/fsck-cache.c
index 0a97566..a01513e 100644 (file)
--- a/fsck-cache.c
+++ b/fsck-cache.c
@@ -30,6 +30,7 @@ static int fsck_tree(unsigned char *sha1, void *data, unsigned long size)
                size -= len + 20;
                mark_needs_sha1(sha1, "blob", file_sha1);
        }
+       return 0;
 }
 
 static int fsck_commit(unsigned char *sha1, void *data, unsigned long size)
@@ -49,6 +50,7 @@ static int fsck_commit(unsigned char *sha1, void *data, unsigned long size)
                mark_needs_sha1(sha1, "commit", parent_sha1);
                data += 7 + 40 + 1;     /* "parent " + <hex sha1> + '\n' */
        }
+       return 0;
 }
 
 static int fsck_entry(unsigned char *sha1, char *tag, void *data, unsigned long size)

diff --git a/read-cache.c b/read-cache.c
index 2ede67d..50d0be3 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -264,10 +264,9 @@ int read_cache(void)
        size = 0; // avoid gcc warning
        map = (void *)-1;
        if (!fstat(fd, &st)) {
-               map = NULL;
                size = st.st_size;
                errno = EINVAL;
-               if (size > sizeof(struct cache_header))
+               if (size >= sizeof(struct cache_header))
                        map = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
        }
        close(fd);