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Revert "This commit adds nsh_consolechild(). I noticed that there are several examples that call nsh_consolemain.c to create to create a new NSH session. That will not always work because nsh_consolemain() performs the one-time initialization needed by the NSH library: Mounting, reading, and running the start-up script, configuring USB tracing. Some of those actions will cause failures if attempted twice."

Browse Source 
This reverts commit 4d364d836a91ce2abc27705ffc375196a775391a.
This commit is contained in:
Gregory Nutt 2016-08-25 14:19:36 -06:00
parent 4d364d836a
commit 4eda22b4db
5 changed files with 12 additions and 150 deletions
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38
include/nshlib/nshlib.h
View File

@ -115,21 +115,16 @@ void nsh_initialize(void);
* Name: nsh_consolemain * Name: nsh_consolemain
* *
* Description: * Description:
* This interfaces may be to called or started with task_start to start a * This interfaces maybe to called or started with task_start to start a
* single an NSH instance that operates on stdin and stdout. This * single an NSH instance that operates on stdin and stdout. This
* function does not return. * function does not return.
* *
* This function performs all basic, one-time initialization logic as
* configured. This includes such things as mounting the romfs /etc/
* file system and running the initialization script, setting up USB
* tracing options. It should be spawned only once for this reason.
*
* This function handles generic /dev/console character devices, or * This function handles generic /dev/console character devices, or
* special USB console devices. The USB console requires some special * special USB console devices. The USB console requires some special
* operations to handle the cases where the session is lost when the * operations to handle the cases where the session is lost when the
* USB device is unplugged and restarted when the USB device is plugged * USB device is unplugged and restarted when the USB device is plugged
* in again. * in again.
* *
* Input Parameters: * Input Parameters:
* Standard task start-up arguments. These are not used. argc may be * Standard task start-up arguments. These are not used. argc may be
* zero and argv may be NULL. * zero and argv may be NULL.
@ -143,35 +138,6 @@ void nsh_initialize(void);
int nsh_consolemain(int argc, char *argv[]); int nsh_consolemain(int argc, char *argv[]);
/****************************************************************************
* Name: nsh_consolechild
*
* Description:
* This interfaces maybe to called or started with task_start to start a
* single a new NSH instance that operates on stdin and stdout. This
* function does not normally return (see below).
*
* This function equivalent to nsh_consolemain(), except it assumes that
* all one-time, NSH has already been perfroemd by nsh_consolemain(). It
* simply startes a NSH session with no re-initialization.
*
* Like nsh_consolmain(), this functions handles generic /dev/console
* character devices (see nsh_usbconsole.c and usb_usbkeyboard for other
* versions for special USB console devices).
*
* 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_consolechild(int argc, char *argv[]);
/**************************************************************************** /****************************************************************************
* Name: nsh_telnetstart * Name: nsh_telnetstart
* *

2
nshlib/Makefile
View File

@ -90,7 +90,7 @@ endif
endif endif
ifeq ($(CONFIG_NSH_CONSOLE),y) ifeq ($(CONFIG_NSH_CONSOLE),y)
CSRCS += nsh_consolemain.c nsh_consolechild.c CSRCS += nsh_consolemain.c
endif endif
ifeq ($(CONFIG_NSH_TELNET),y) ifeq ($(CONFIG_NSH_TELNET),y)

98
nshlib/nsh_consolechild.c
View File

@ -1,98 +0,0 @@
/****************************************************************************
* apps/nshlib/nsh_consolechild.c
*
* Copyright (C) 2016 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 Gregory Nutt 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
#include <assert.h>
#include "nsh.h"
#include "nsh_console.h"
#if !defined(HAVE_USB_CONSOLE) && !defined(HAVE_USB_KEYBOARD)
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nsh_consolechild
*
* Description:
* This interfaces maybe to called or started with task_start to start a
* single a new NSH instance that operates on stdin and stdout. This
* function does not normally return (see below).
*
* This function equivalent to nsh_consolemain(), except it assumes that
* all one-time, NSH has already been perfroemd by nsh_consolemain(). It
* simply startes a NSH session with no re-initialization.
*
* Like nsh_consolmain(), this functions handles generic /dev/console
* character devices (see nsh_usbconsole.c and usb_usbkeyboard for other
* versions for special USB console devices).
*
* 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_consolechild(int argc, char *argv[])
{
FAR struct console_stdio_s *pstate = nsh_newconsole();
int ret;
DEBUGASSERT(pstate != NULL);
/* Execute the session */
ret = nsh_session(pstate);
/* Exit upon return */
nsh_exit(&pstate->cn_vtbl, ret);
return ret;
}
#endif /* !HAVE_USB_CONSOLE && !HAVE_USB_KEYBOARD */

17
nshlib/nsh_consolemain.c
View File

@ -55,19 +55,14 @@
* Name: nsh_consolemain (Normal character device version) * Name: nsh_consolemain (Normal character device version)
* *
* Description: * Description:
* This interfaces may be to called or started with task_start to start a * This interfaces maybe to called or started with task_start to start a
* single an NSH instance that operates on stdin and stdout. This * single an NSH instance that operates on stdin and stdout. This
* function does not normally return (see below). * function does not normally return (see below).
* *
* This function performs all basic, one-time initialization logic as * This version of nsh_consolmain handles generic /dev/console character
* configured. This includes such things as mounting the romfs /etc/
* file system and running the initialization script, setting up USB
* tracing options. It should be spawned only once for this reason.
*
* This version of nsh_consolmain() handles generic /dev/console character
* devices (see nsh_usbconsole.c and usb_usbkeyboard for other versions * devices (see nsh_usbconsole.c and usb_usbkeyboard for other versions
* for special USB console devices). * for special USB console devices).
* *
* Input Parameters: * Input Parameters:
* Standard task start-up arguments. These are not used. argc may be * Standard task start-up arguments. These are not used. argc may be
* zero and argv may be NULL. * zero and argv may be NULL.
@ -84,17 +79,17 @@ int nsh_consolemain(int argc, char *argv[])
FAR struct console_stdio_s *pstate = nsh_newconsole(); FAR struct console_stdio_s *pstate = nsh_newconsole();
int ret; int ret;
DEBUGASSERT(pstate != NULL); DEBUGASSERT(pstate);
#ifdef CONFIG_NSH_ROMFSETC
/* Execute the start-up script */ /* Execute the start-up script */
#ifdef CONFIG_NSH_ROMFSETC
(void)nsh_initscript(&pstate->cn_vtbl); (void)nsh_initscript(&pstate->cn_vtbl);
#endif #endif
#ifdef CONFIG_NSH_USBDEV_TRACE
/* Initialize any USB tracing options that were requested */ /* Initialize any USB tracing options that were requested */
#ifdef CONFIG_NSH_USBDEV_TRACE
usbtrace_enable(TRACE_BITSET); usbtrace_enable(TRACE_BITSET);
#endif #endif

7
nshlib/nsh_session.c
View File

@ -59,13 +59,12 @@
* Name: nsh_session * Name: nsh_session
* *
* Description: * Description:
* This is the common session login or each NSH session. This function * This is the common session logic or any NSH session. This function
* returns when an error reading from the input stream occurs, presumably * return when an error reading from the input stream occurs, presumably
* signaling the end of the session. * signaling the end of the session.
* *
* This function: * This function:
* - Performs the logic sequence if so configured. * - Executes the NSH logic script
* - Executes the NSH login script
* - Presents a greeting * - Presents a greeting
* - Then provides a prompt then gets and processes the command line. * - Then provides a prompt then gets and processes the command line.
* - This continues until an error occurs, then the session returns. * - This continues until an error occurs, then the session returns.