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

1 files changed, 195 insertions, 0 deletions

diff --git a/apps/nshlib/nsh_script.c b/apps/nshlib/nsh_script.c
new file mode 100644
index 000000000..3aa698b31
--- /dev/null
+++ b/apps/nshlib/nsh_script.c
@@ -0,0 +1,195 @@
+/****************************************************************************
+ * apps/nshlib/nsh_script.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 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include "nsh.h"
+#include "nsh_console.h"
+
+#if  CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0 && !defined(CONFIG_NSH_DISABLESCRIPT)
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nsh_script
+ *
+ * Description:
+ *   Execute the NSH script at path.
+ *
+ ****************************************************************************/
+
+int nsh_script(FAR struct nsh_vtbl_s *vtbl, FAR const char *cmd,
+               FAR const char *path)
+{
+  char *fullpath;
+  FILE *stream;
+  char *buffer;
+  char *pret;
+  int ret = ERROR;
+
+  /* The path to the script may be relative to the current working directory */
+
+  fullpath = nsh_getfullpath(vtbl, path);
+  if (!fullpath)
+    {
+      return ERROR;
+    }
+
+  /* Get a reference to the common input buffer */
+
+  buffer = nsh_linebuffer(vtbl);
+  if (buffer)
+    {
+      /* Open the file containing the script */
+
+      stream = fopen(fullpath, "r");
+      if (!stream)
+        {
+          nsh_output(vtbl, g_fmtcmdfailed, cmd, "fopen", NSH_ERRNO);
+          nsh_freefullpath(fullpath);
+          return ERROR;
+        }
+
+      /* Loop, processing each command line in the script file (or
+       * until an error occurs)
+       */
+
+      do
+        {
+          /* Get the next line of input from the file */
+
+          fflush(stdout);
+          pret = fgets(buffer, CONFIG_NSH_LINELEN, stream);
+          if (pret)
+            {
+              /* Parse process the command.  NOTE:  this is recursive...
+               * we got to cmd_sh via a call to nsh_parse.  So some
+               * considerable amount of stack may be used.
+               */
+
+              ret = nsh_parse(vtbl, buffer);
+            }
+        }
+      while (pret && ret == OK);
+      fclose(stream);
+    }
+
+  nsh_freefullpath(fullpath);
+  return ret;
+}
+
+/****************************************************************************
+ * Name: nsh_initscript
+ *
+ * Description:
+ *   Attempt to execute the configured initialization script.  This script
+ *   should be executed once when NSH starts.  nsh_initscript is idempotent
+ *   and may, however, be called multiple times (the script will be executed
+ *   once.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_NSH_ROMFSETC
+int nsh_initscript(FAR struct nsh_vtbl_s *vtbl)
+{
+  static bool initialized;
+  bool already;
+  int ret = OK;
+
+  /* Atomic test and set of the initialized flag */
+
+  sched_lock();
+  already     = initialized;
+  initialized = true;
+  sched_unlock();
+
+  /* If we have not already executed the init script, then do so now */
+
+  if (!already)
+    {
+      ret = nsh_script(vtbl, "init", NSH_INITPATH);
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: nsh_loginscript
+ *
+ * Description:
+ *   Attempt to execute the configured login script.  This script
+ *   should be executed when each NSH session starts.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_NSH_ROMFSRC
+int nsh_loginscript(FAR struct nsh_vtbl_s *vtbl)
+{
+  return nsh_script(vtbl, "login", NSH_RCPATH);
+}
+#endif
+#endif /* CONFIG_NSH_ROMFSETC */
+
+#endif /* CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0 && !CONFIG_NSH_DISABLESCRIPT */