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diff --git a/apps/netutils/telnetd/shell.h b/apps/netutils/telnetd/shell.h
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+/****************************************************************************
+ * netutils/telnetd/shell.h
+ * Interface for the Contiki shell.
+ *
+ *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Based on uIP which also has a BSD style license:
+ *
+ *   Author: Adam Dunkels <adam@dunkels.com>
+ *   Copyright (c) 2003, Adam Dunkels.
+ *   All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/* Some of the functions declared in this file must be implemented as
+ * a shell back-end in the architecture specific files of a Contiki
+ * port.
+ */
+
+#ifndef __SHELL_H__
+#define __SHELL_H__
+
+/* Initialize the shell.
+ *
+ * Called when the shell front-end process starts. This function may
+ * be used to start listening for signals.
+ */
+
+void shell_init(void *handle);
+
+/* Start the shell back-end.
+ *
+ * Called by the front-end when a new shell is started.
+ */
+
+void shell_start(void *handle);
+
+/* Process a shell command.
+ *
+ * This function will be called by the shell GUI / telnet server whan
+ * a command has been entered that should be processed by the shell
+ * back-end.
+ *
+ * command The command to be processed.
+ */
+
+void shell_input(void *handle, char *command);
+
+/* Quit the shell. */
+
+void shell_quit(void *handle, char *);
+
+/* Print a string to the shell window.
+ *
+ * This function is implemented by the shell GUI / telnet server and
+ * can be called by the shell back-end to output a string in the
+ * shell window. The string is automatically appended with a linebreak.
+ */
+
+void shell_output(void *handle, const char *fmt, ...);
+
+/* Print a prompt to the shell window.
+ *
+ * This function can be used by the shell back-end to print out a
+ * prompt to the shell window.
+ *
+ */
+
+void shell_prompt(void *handle, char *prompt);
+
+#endif /* __SHELL_H__ */