init: handle empty "template" parameter
If a user passes "--template=", then our template parameter
is blank. Unfortunately, copy_templates() assumes it has at
least one character, and does all sorts of bad things like
reading from template[-1] and then proceeding to link all of
'/' into the .git directory.
This patch just checks for that condition in copy_templates
and aborts. As a side effect, this means that --template=
now has the meaning "don't copy any templates."
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin-init-db.c b/builtin-init-db.c
index 38b4fcb..baf0d09 100644
--- a/builtin-init-db.c
+++ b/builtin-init-db.c
@@ -117,6 +117,8 @@
template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT);
if (!template_dir)
template_dir = system_path(DEFAULT_GIT_TEMPLATE_DIR);
+ if (!template_dir[0])
+ return;
strcpy(template_path, template_dir);
template_len = strlen(template_path);
if (template_path[template_len-1] != '/') {
