Don't use memcpy when source and dest. buffers may overlap

[git.git] / builtin-symbolic-ref.c

diff --git a/builtin-symbolic-ref.c b/builtin-symbolic-ref.c
index 6f18db870a2e4ea020034533243617ceb6275afa..d8be0527f4752131b0a1276ecedcc82714636c28 100644 (file)
--- a/builtin-symbolic-ref.c
+++ b/builtin-symbolic-ref.c
@@ -1,5 +1,6 @@
 #include "builtin.h"
 #include "cache.h"
+#include "refs.h"
 
 static const char git_symbolic_ref_usage[] =
 "git-symbolic-ref name [ref]";
@@ -7,10 +8,13 @@ static const char git_symbolic_ref_usage[] =
 static void check_symref(const char *HEAD)
 {
        unsigned char sha1[20];
-       const char *refs_heads_master = resolve_ref("HEAD", sha1, 0);
+       int flag;
+       const char *refs_heads_master = resolve_ref(HEAD, sha1, 0, &flag);
 
        if (!refs_heads_master)
                die("No such ref: %s", HEAD);
+       else if (!(flag & REF_ISSYMREF))
+               die("ref %s is not a symbolic ref", HEAD);
        puts(refs_heads_master);
 }