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
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+++ b/apps/nshlib/nsh_session.c
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+/****************************************************************************
+ * 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;
+}