/* Both readn and writen are deprecated and will be removed. They are not
suitable for use with non-blocking file descriptors.
*/
-extern int readn(int, u_char *, int);
-extern int writen(int, const u_char *, int);
+extern int readn(int, uint8_t *, int);
+extern int writen(int, const uint8_t *, int);
/* Set the file descriptor to use non-blocking I/O. Returns 0 for success,
-1 on error. */