Fix mkpath abuse in dwim_ref and dwim_log of sha1_name.c

Otherwise the function sometimes fail to resolve obviously correct
refnames, because the string data pointed to by "str" argument were
reused.

The change in dwim_log does not fix anything, just optimizes away
strcpy code as the path can be created directly in the available
buffer.

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/sha1_name.c b/sha1_name.c
index 4fb77f8863ec075de38b84171d3ef039a00cee4c..75a5a7e96f292bed344a7609fca2f3a45ba4314e 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -245,11 +245,13 @@ int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref)
 
        *ref = NULL;
        for (p = ref_rev_parse_rules; *p; p++) {
+               char fullref[PATH_MAX];
                unsigned char sha1_from_ref[20];
                unsigned char *this_result;
 
                this_result = refs_found ? sha1_from_ref : sha1;
-               r = resolve_ref(mkpath(*p, len, str), this_result, 1, NULL);
+               mksnpath(fullref, sizeof(fullref), *p, len, str);
+               r = resolve_ref(fullref, this_result, 1, NULL);
                if (r) {
                        if (!refs_found++)
                                *ref = xstrdup(r);
@@ -272,7 +274,7 @@ int dwim_log(const char *str, int len, unsigned char *sha1, char **log)
                char path[PATH_MAX];
                const char *ref, *it;
 
-               strcpy(path, mkpath(*p, len, str));
+               mksnpath(path, sizeof(path), *p, len, str);
                ref = resolve_ref(path, hash, 1, NULL);
                if (!ref)
                        continue;