* signal handlers, so we must use a print method which is signal safe.
*/
-extern int ust_safe_snprintf(char *str, size_t n, const char *fmt, ...);
+extern int ust_safe_snprintf(char *str, size_t n, const char *fmt, ...)
+ __attribute__ ((format (printf, 3, 4)));
#define sigsafe_print_err(fmt, args...) \
{ \