[PATCH 4/4] ui-tree: remove a fixed size buffer

[John Keeping]

As libgit.a moves away from using fixed size buffers, there is no
guarantee that PATH_MAX is sufficient for all of the paths in a Git
tree, so we should use a dynamically sized buffer here.

Coverity-Id: 141884
Signed-off-by: John Keeping <john at keeping.me.uk>
---
 ui-tree.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/ui-tree.c b/ui-tree.c
index 120066c..9966f75 100644
--- a/ui-tree.c
+++ b/ui-tree.c
@@ -258,22 +258,25 @@ static int walk_tree(const unsigned char *sha1, struct strbuf *base,
 		const char *pathname, unsigned mode, int stage, void *cbdata)
 {
 	struct walk_tree_context *walk_tree_ctx = cbdata;
-	static char buffer[PATH_MAX];
 
 	if (walk_tree_ctx->state == 0) {
-		memcpy(buffer, base->buf, base->len);
-		strcpy(buffer + base->len, pathname);
-		if (strcmp(walk_tree_ctx->match_path, buffer))
+		struct strbuf buffer = STRBUF_INIT;
+
+		strbuf_addbuf(&buffer, base);
+		strbuf_addstr(&buffer, pathname);
+		if (strcmp(walk_tree_ctx->match_path, buffer.buf))
 			return READ_TREE_RECURSIVE;
 
 		if (S_ISDIR(mode)) {
 			walk_tree_ctx->state = 1;
-			set_title_from_path(buffer);
+			set_title_from_path(buffer.buf);
+			strbuf_release(&buffer);
 			ls_head();
 			return READ_TREE_RECURSIVE;
 		} else {
 			walk_tree_ctx->state = 2;
-			print_object(sha1, buffer, pathname, walk_tree_ctx->curr_rev);
+			print_object(sha1, buffer.buf, pathname, walk_tree_ctx->curr_rev);
+			strbuf_release(&buffer);
 			return 0;
 		}
 	}
-- 
2.9.2.639.g855ae9f