Add utilities cleanup routine.

src/cryptsetup.c

@@ -127,6 +127,10 @@ static const char **action_argv;
 static int action_argc;
 static const char *null_action_argv[] = {NULL, NULL};
 
+void tools_cleanup(void)
+{
+}
+
 static const char *uuid_or_device_header(const char **data_device)
 {
 	if (data_device)

src/cryptsetup.h

@@ -116,6 +116,9 @@ int tools_wipe_all_signatures(const char *path);
 int tools_lookup_crypt_device(struct crypt_device *cd, const char *type,
 		const char *data_device_path, char *name, size_t name_length);
 
+/* each utility is required to implement it */
+void tools_cleanup(void);
+
 /* Log */
 #define log_dbg(x...) clogger(NULL, CRYPT_LOG_DEBUG, __FILE__, __LINE__, x)
 #define log_std(x...) clogger(NULL, CRYPT_LOG_NORMAL, __FILE__, __LINE__, x)

src/cryptsetup_reencrypt.c

@@ -117,6 +117,10 @@ typedef enum {
 	CHECK_OPEN,
 } header_magic;
 
+void tools_cleanup(void)
+{
+}
+
 static void _quiet_log(int level, const char *msg, void *usrptr)
 {
 	if (!opt_debug)

src/integritysetup.c

@@ -63,6 +63,10 @@ static const char *integrity_alg = DEFAULT_ALG_NAME;
 static const char **action_argv;
 static int action_argc;
 
+void tools_cleanup(void)
+{
+}
+
 // FIXME: move this to tools and handle EINTR
 static int _read_mk(const char *file, char **key, int keysize)
 {

src/utils_tools.c

@@ -238,6 +238,7 @@ __attribute__ ((noreturn)) void usage(poptContext popt_context,
 	poptPrintUsage(popt_context, stderr, 0);
 	if (error)
 		log_err("%s: %s", more, error);
+	tools_cleanup();
 	poptFreeContext(popt_context);
 	exit(exitcode);
 }

src/veritysetup.c

@@ -46,6 +46,10 @@ static int opt_check_at_most_once = 0;
 static const char **action_argv;
 static int action_argc;
 
+void tools_cleanup(void)
+{
+}
+
 static int _prepare_format(struct crypt_params_verity *params,
 			   const char *data_device,
 			   uint32_t flags)