-ssize_t m_strcpy(char *dst, ssize_t n, const char *src);
-ssize_t m_strncpy(char *dst, ssize_t n, const char *src, ssize_t l);
+ssize_t m_strcpy(char *dst, ssize_t n, const char *src)
+ __attribute__((nonnull(1)));
+
+ssize_t m_strncpy(char *dst, ssize_t n, const char *src, ssize_t l)
+ __attribute__((nonnull(1)));