cgi: allow conf.cgi_docroot_path to be NULL

The check_cgi_path() function would segfault if we ever support running
uhttpd without any CGI prefix.

Add a check to prevent running uh_patch_match() when the prefix is unset.

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/cgi.c b/cgi.c
index dc302a9..0ffb130 100644
--- a/cgi.c
+++ b/cgi.c
@@ -104,7 +104,11 @@ static bool check_cgi_path(struct path_info *pi, const char *url)
 	}
 
 	pi->ip = NULL;
-	return uh_path_match(conf.cgi_docroot_path, pi->phys);
+
+	if (conf.cgi_docroot_path)
+		return uh_path_match(conf.cgi_docroot_path, pi->phys);
+
+	return false;
 }
 
 struct dispatch_handler cgi_dispatch = {