extern char *xstrdup PARAMS ((const char *)) ATTRIBUTE_MALLOC;
+/* Copy at most N characters from string into a buffer without fail. */
+
+extern char *xstrndup PARAMS ((const char *, size_t)) ATTRIBUTE_MALLOC;
+
/* Copy an existing memory buffer to a new memory buffer without fail. */
extern PTR xmemdup PARAMS ((const PTR, size_t, size_t)) ATTRIBUTE_MALLOC;