diff options
Diffstat (limited to 'apps/nshlib/nsh_stdsession.c')
-rw-r--r-- | apps/nshlib/nsh_stdsession.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/apps/nshlib/nsh_stdsession.c b/apps/nshlib/nsh_stdsession.c new file mode 100644 index 000000000..11fae7db7 --- /dev/null +++ b/apps/nshlib/nsh_stdsession.c @@ -0,0 +1,152 @@ +/**************************************************************************** + * apps/nshlib/nsh_stdsession.c + * + * Copyright (C) 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 an NSH session that uses only stdin + * and stdout. + * + * 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 only + * + ****************************************************************************/ + +int nsh_session(FAR struct console_stdio_s *pstate) +{ + int ret; + + DEBUGASSERT(pstate); + + /* Present a greeting */ + + printf("%s", g_nshgreeting); + + /* 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 */ + + printf("%s", g_nshprompt); + + /* Get the next line of input. readline() returns EOF on end-of-file + * or any read failure. + */ + + ret = std_readline(pstate->cn_line, CONFIG_NSH_LINELEN); + if (ret != EOF) + { + /* Parse process the command */ + + (void)nsh_parse(&pstate->cn_vtbl, pstate->cn_line); + } + + /* Readline normally returns the number of characters read, + * but will return EOF on end of file or if an error occurs. + * EOF will cause the session to terminate. + */ + + else + { + printf(g_fmtcmdfailed, "nsh_session", "readline", NSH_ERRNO_OF(-ret)); + return EXIT_SUCCESS; + } + } + + /* 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; +} |