+/* Check if a single character can be read from input. */
+int cmdline_poll_char(struct cmdline *cl);
+
+/* Read one character from input. */
+ssize_t cmdline_read_char(struct cmdline *cl, char *c);
+
+/* vdprintf(3) */
+__rte_format_printf(2, 0)
+int cmdline_vdprintf(int fd, const char *format, va_list op);
+