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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2013-01-29 22:11:04 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2013-01-29 22:11:04 +0000 |
commit | 7b78d906d966d2c2b266bce9c1c0c8fef19c3103 (patch) | |
tree | de34ca63f68a004de6c9d864ef380a56b870e84a /apps/nshlib/nsh_session.c | |
parent | f5308beae0c268fa2b27e3a524e76afe871b6234 (diff) | |
download | nuttx-7b78d906d966d2c2b266bce9c1c0c8fef19c3103.tar.gz nuttx-7b78d906d966d2c2b266bce9c1c0c8fef19c3103.tar.bz2 nuttx-7b78d906d966d2c2b266bce9c1c0c8fef19c3103.zip |
Add support for a login script (in addition to the init script); Add logic so that a USB console session can connect and reconnect to the USB serial device
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5582 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'apps/nshlib/nsh_session.c')
-rw-r--r-- | apps/nshlib/nsh_session.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/apps/nshlib/nsh_session.c b/apps/nshlib/nsh_session.c new file mode 100644 index 000000000..8079b2de5 --- /dev/null +++ b/apps/nshlib/nsh_session.c @@ -0,0 +1,163 @@ +/**************************************************************************** + * apps/nshlib/nsh_session.c + * + * Copyright (C) 2007-2009, 2011-2013 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 <stdlib.h> + +#include <apps/readline.h> + +#include "nsh.h" +#include "nsh_console.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nsh_session + * + * Description: + * This is the common session logic or any NSH session. This function + * return when an error reading from the input stream occurs, presumably + * signaling the end of the session. + * + * This function: + * - Executes the NSH logic script + * - Presents a greeting + * - Then provides a prompt then gets and processes the command line. + * - This continues until an error occurs, then the session returns. + * + * Input Parameters: + * pstate - Abstracts the underlying session. + * + * Returned Values: + * EXIT_SUCESS or EXIT_FAILURE is returned. + * + ****************************************************************************/ + +int nsh_session(FAR struct console_stdio_s *pstate) +{ + int ret; + + DEBUGASSERT(pstate); + + /* Present a greeting */ + + fputs(g_nshgreeting, pstate->cn_outstream); + fflush(pstate->cn_outstream); + + /* Execute the login script */ + +#ifdef CONFIG_NSH_ROMFSRC + (void)nsh_loginscript(&pstate->cn_vtbl); +#endif + + /* Then enter the command line parsing loop */ + + for (;;) + { + /* For the case of debugging the USB console... dump collected USB trace data */ + +#ifdef CONFIG_NSH_USBDEV_TRACE + nsh_usbtrace(); +#endif + + /* Display the prompt string */ + + fputs(g_nshprompt, pstate->cn_outstream); + fflush(pstate->cn_outstream); + + /* Get the next line of input */ + + ret = readline(pstate->cn_line, CONFIG_NSH_LINELEN, + INSTREAM(pstate), OUTSTREAM(pstate)); + if (ret > 0) + { + /* Parse process the command */ + + (void)nsh_parse(&pstate->cn_vtbl, pstate->cn_line); + fflush(pstate->cn_outstream); + } + + /* Readline normally returns the number of characters read, + * but will return 0 on end of file or a negative value + * if an error occurs. Either will cause the session to + * terminate. + */ + + else + { + fprintf(pstate->cn_outstream, g_fmtcmdfailed, "nsh_session", + "readline", NSH_ERRNO_OF(-ret)); + return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE; + } + } + + /* We do not get here, but this is necessary to keep some compilers happy. + * But others will complain that this code is not reachable. + */ + + return EXIT_SUCCESS; +} |