1 file changed, 23 insertions, 1 deletion
diff --git a/source/ui-repolist.c b/source/ui-repolist.c
index 87abf0b..3eb9375 100644
--- a/source/ui-repolist.c
+++ b/source/ui-repolist.c
@@ -170,6 +170,23 @@ static int any_repos_visible(void)
 }
 
 /*
+ * Whether any listed repository lies under the url the request carried,
+ * whatever the search terms.
+ */
+static int any_repos_under_url(void)
+{
+	int i;
+
+	for (i = 0; i < cgit_repolist.count; i++) {
+		struct cgit_repo *repo = &cgit_repolist.repos[i];
+
+		if (!repo->hide && !repo->ignore && matches_url(repo))
+			return 1;
+	}
+	return 0;
+}
+
+/*
  * currenturl is passed in because it is the same for every heading and every
  * row, and working it out here would mean an allocation and a free per cell.
  */
@@ -398,7 +415,12 @@ void cgit_print_repolist(void)
 			cgit_read_repo_desc(&cgit_repolist.repos[i]);
 
 	if (!any_repos_visible()) {
-		cgit_print_error_page(404, "Not Found", "No repositories found");
+		// A url naming no repository or page lands here, as a prefix
+		// that no repository's url starts with.
+		if (ctx.qry.url && *ctx.qry.url && !any_repos_under_url())
+			cgit_print_error_page(404, "Not Found", "Nothing matches this url");
+		else
+			cgit_print_error_page(404, "Not Found", "No repositories found");
 		return;
 	}