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nuttx-apps/include/nshlib/nshlib.h

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/****************************************************************************
* apps/include/nshlib/nshlib.h
*
* Copyright (C) 2011, 2013, 2016-2017 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT OWNER OR CONTRIBUTORS 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.
*
****************************************************************************/
#ifndef __APPS_INCLUDE_NSHLIB_NSHLIB_H
#define __APPS_INCLUDE_NSHLIB_NSHLIB_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* If a USB device is selected for the NSH console then we need to handle some
* special start-up conditions.
*/
#undef HAVE_USB_CONSOLE
#if defined(CONFIG_USBDEV)
/* Check for a PL2303 serial console. Use console device "/dev/console". */
# if defined(CONFIG_PL2303) && defined(CONFIG_PL2303_CONSOLE)
# define HAVE_USB_CONSOLE 1
/* Check for a CDC/ACM serial console. Use console device "/dev/console". */
# elif defined(CONFIG_CDCACM) && defined(CONFIG_CDCACM_CONSOLE)
# define HAVE_USB_CONSOLE 1
/* Check for a generic USB console. In this case, the USB console device
* must be provided in CONFIG_NSH_USBCONDEV.
*/
# elif defined(CONFIG_NSH_USBCONSOLE)
# define HAVE_USB_CONSOLE 1
# endif
#endif
#if CONFIG_RR_INTERVAL > 0
# define SCHED_NSH SCHED_RR
#else
# define SCHED_NSH SCHED_FIFO
#endif
/****************************************************************************
* Public Data
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: nsh_initialize
*
* Description:
* This interface is used to initialize the NuttShell (NSH).
* nsh_initialize() should be called one during application start-up prior
* to executing either nsh_consolemain() or nsh_telnetstart().
*
* Input Parameters:
* None
*
* Returned Value:
* None
*
****************************************************************************/
void nsh_initialize(void);
/****************************************************************************
* Name: nsh_consolemain
*
* Description:
* This interfaces maybe to called or started with task_start to start a
* single an NSH instance that operates on stdin and stdout. This
* function does not return.
*
* This function handles generic /dev/console character devices, or
* special USB console devices. The USB console requires some special
* operations to handle the cases where the session is lost when the
* USB device is unplugged and restarted when the USB device is plugged
* in again.
*
* Input Parameters:
* Standard task start-up arguments. These are not used. argc may be
* zero and argv may be NULL.
*
* Returned Values:
* This function does not normally return. exit() is usually called to
* terminate the NSH session. This function will return in the event of
* an error. In that case, a non-zero value is returned (EXIT_FAILURE=1).
*
****************************************************************************/
int nsh_consolemain(int argc, char *argv[]);
/****************************************************************************
* Name: nsh_telnetstart
*
* Description:
* nsh_telnetstart() starts the Telnet daemon that will allow multiple
* NSH connections via Telnet. This function returns immediately after
* the daemon has been started.
*
* Input Parameters:
* family - Provides the IP family to use by the server. May be either
* AF_INET or AF_INET6. This is needed because both both may be
* enabled in the configuration.
*
* All of the other properties of the Telnet daemon are controlled by
* NuttX configuration settings.
*
* Returned Values:
* The task ID of the Telnet daemon was successfully started. A negated
* errno value will be returned on failure.
*
****************************************************************************/
int nsh_telnetstart(sa_family_t family);
/****************************************************************************
* Name: platform_motd
*
* Description:
* If CONFIG_NSH_PLATFORM_MOTD is defined, then platform-specific logic
* must provide this function in order to obtain the Message of the Day
* (MOTD)
*
* Input Parmeters:
* buffer - A caller allocated buffer in which to receive the MOTD
* buflen - The length in bytes of the caller allocated buffer
*
* Returned value:
* None
*
****************************************************************************/
#ifdef CONFIG_NSH_PLATFORM_MOTD
void platform_motd(FAR char *buffer, size_t buflen);
#endif
/****************************************************************************
* Name: platform_user_verify
*
* Description:
* If CONFIG_NSH_LOGIN_PLATFORM is defined, then platform-specific logic
* must provide this function in order verify user credentials as part of
* the login process.
*
* Input Parmeters:
* username/password - User credentials to be verified.
*
* Returned value:
* 1 - The user credentials are verified
* 0 - The user credentials are incorrect
* <0 - An error occurred. The returned value is a negated errno number.
*
****************************************************************************/
#ifdef CONFIG_NSH_LOGIN_PLATFORM
int platform_user_verify(FAR const char *username, FAR const char *password);
#endif
/****************************************************************************
* Name: nsh_system
*
* Description:
* This is the NSH-specific implementation of the standard system()
* command.
*
* NOTE: This assumes that other NSH instances have previously ran and so
* common NSH logic is already initialized.
*
* Input Parameters:
* Standard task start-up arguments. Expects argc == 2 with argv[1] being
* the command to execute
*
* Returned Values:
* EXIT_SUCCESS or EXIT_FAILURE
*
****************************************************************************/
int nsh_system(int argc, char *argv[]);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* __APPS_INCLUDE_NSHLIB_NSHLIB_H */
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