Add PKCS11_FORCE_CLEANUP option to control shutdown behavior at exit

Author: olszomal

NEWS

@@ -4,6 +4,8 @@ New in 0.4.14; unreleased
 * Added support for the "pkcs11prov" provider with OpenSSL 3.0
   (Małgorzata Olszówka)
 * Removed support for OpenSSL older than 1.0.2 (Michał Trojnara)
+* Added PKCS11_FORCE_CLEANUP to force cleanup on exit and avoid memory leaks
+  with certain PKCS#11 modules
 
 New in 0.4.13; 2024-12-13; Michał Trojnara
 * Increased maximum PIN length (Michał Trojnara)

src/util_uri.c

@@ -150,6 +150,10 @@ static int util_ctx_enumerate_slots_unlocked(UTIL_CTX *ctx)
  */
 static void exit_callback(void)
 {
+	const char *str = getenv("PKCS11_FORCE_CLEANUP");
+
+	if (str && (!strcmp(str, "1") || !strcasecmp(str, "yes")))
+		return;
 	g_shutdown_mode = 1;
 }