Move NSH to apps/ as library

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3393 42af7a65-404d-4744-a932-0658087f49c3

46 files changed, 2223 insertions, 1293 deletions

diff --git a/apps/nshlib/Makefile b/apps/nshlib/Makefile
new file mode 100644
index 000000000..e4f5bf7b5
--- /dev/null
+++ b/apps/nshlib/Makefile
@@ -0,0 +1,121 @@
+############################################################################
+# apps/nshlib/Makefile
+#
+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#
+# 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.
+#
+############################################################################
+
+# TODO, this makefile should run make under the app dirs, instead of
+# sourcing the Make.defs!
+
+-include $(TOPDIR)/Make.defs
+include ../Make.defs
+
+ifeq ($(WINTOOL),y)
+INCDIROPT	= -w
+endif
+
+# NSH Library
+
+ASRCS	=
+CSRCS	= nsh_main.c nsh_fscmds.c nsh_ddcmd.c nsh_proccmds.c nsh_mmcmds.c \
+		nsh_envcmds.c nsh_dbgcmds.c
+
+ifeq ($(CONFIG_EXAMPLES_NSH_BUILTIN_APPS),y)
+CSRCS	+= nsh_apps.c
+endif
+
+ifeq ($(CONFIG_EXAMPLES_NSH_ROMFSETC),y)
+CSRCS	+= nsh_romfsetc.c
+endif
+
+ifeq ($(CONFIG_NET),y)
+CSRCS	+= nsh_netinit.c nsh_netcmds.c
+endif
+
+ifeq ($(CONFIG_EXAMPLES_NSH_CONSOLE),y)
+CSRCS	+= nsh_serial.c
+endif
+
+ifeq ($(CONFIG_EXAMPLES_NSH_TELNET),y)
+CSRCS	+= nsh_telnetd.c
+endif
+
+ifneq ($(CONFIG_EXAMPLES_NSH_DISABLESCRIPT),y)
+CSRCS	+= nsh_test.c
+endif
+
+AOBJS		= $(ASRCS:.S=$(OBJEXT))
+COBJS		= $(CSRCS:.c=$(OBJEXT))
+
+SRCS		= $(ASRCS) $(CSRCS)
+OBJS		= $(AOBJS) $(COBJS)
+
+BIN	    	= ../libapps$(LIBEXT)
+
+ROOTDEPPATH	= --dep-path .
+
+# Common build
+
+VPATH		= 
+
+all:	.built
+
+$(AOBJS): %$(OBJEXT): %.S
+	$(call ASSEMBLE, $<, $@)
+
+$(COBJS): %$(OBJEXT): %.c
+	$(call COMPILE, $<, $@)
+
+$(BIN):	$(OBJS)
+	@( for obj in $(OBJS) ; do \
+		$(call ARCHIVE, $@, $${obj}); \
+	done ; )
+	@touch .built
+	
+.built: $(BIN)
+
+.depend: Makefile $(SRCS)
+	@$(MKDEP) $(ROOTDEPPATH) \
+	  $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
+	@touch $@
+
+# Register application
+depend: .depend
+
+clean:
+	@rm -f $(BIN) *.o *~ .*.swp .built
+	$(call CLEAN)
+
+distclean: clean
+	@rm -f Make.dep .depend
+
+-include Make.dep
diff --git a/nuttx/examples/nsh/README.txt b/apps/nshlib/README.txt
index ab44cbaeb..10bb202df 100644
--- a/nuttx/examples/nsh/README.txt
+++ b/apps/nshlib/README.txt
@@ -1,8 +1,8 @@
-examples/nsh
-^^^^^^^^^^^^
+apps/nshlib
+^^^^^^^^^^^
 
-  This directory contains the NuttShell (NSH).  This is a simple
-  shell application for NuttX.
+  This directory contains the NuttShell (NSH) library.  This library can be
+  linked with other logic to provide a simple shell application for NuttX.
 
   - Console/NSH Front End
   - Command Overview
@@ -159,7 +159,7 @@ Modifying the ROMFS Image
 -------------------------
 
 The contents of the /etc directory are retained in the file
-examples/nsh/nsh_romfsimg.h (OR, if CONFIG_EXAMPLES_NSH_ARCHROMFS
+apps/nshlib/nsh_romfsimg.h (OR, if CONFIG_EXAMPLES_NSH_ARCHROMFS
 is defined, include/arch/board/rcs.template).  In order to modify
 the start-up behavior, there are three things to study:
 
@@ -178,17 +178,17 @@ the start-up behavior, there are three things to study:
 
    - The configuration settings of the installed NuttX configuration.
    - The genromfs tool (available from http://romfs.sourceforge.net).
-   - The file examples/nsh/rcS.template (OR, if
+   - The file apps/nshlib/rcS.template (OR, if
      CONFIG_EXAMPLES_NSH_ARCHROMFS is defined, include/arch/board/rcs.template)
 
 3. rcS.template.
-   The file examples/nsh/rcS.template contains the general form
+   The file apps/nshlib/rcS.template contains the general form
    of the rcS file; configured values are plugged into this
    template file to produce the final rcS file.
 
 NOTE:
 
-   examples/nsh/rcS.template generates the standard, default
+   apps/nshlib/rcS.template generates the standard, default
    nsh_romfsimg.h file.  If CONFIG_EXAMPLES_NSH_ARCHROMFS is defined
    in the NuttX configuration file, then a custom, board-specific
    nsh_romfsimg.h file residing in configs/<board>/include will be
diff --git a/nuttx/examples/nsh/nsh.h b/apps/nshlib/nsh.h
index ea05da31b..c92bb6e80 100644
--- a/nuttx/examples/nsh/nsh.h
+++ b/apps/nshlib/nsh.h
@@ -1,5 +1,5 @@
 /****************************************************************************
- * examples/nsh/nsh.h
+ * apps/nshlib/nsh.h
  *
  *   Copyright (C) 2007-2011 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
diff --git a/nuttx/examples/nsh/nsh_apps.c b/apps/nshlib/nsh_apps.c
index 58f44414a..0c786dc12 100644
--- a/nuttx/examples/nsh/nsh_apps.c
+++ b/apps/nshlib/nsh_apps.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * examples/nsh/nsh_apps.c
+ * apps/nshlib/nsh_apps.c
  *
  *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
  *   Copyright (C) 2011 Uros Platise. All rights reserved.
diff --git a/nuttx/examples/nsh/nsh_dbgcmds.c b/apps/nshlib/nsh_dbgcmds.c
index ef026c68a..001f5dd49 100644
--- a/nuttx/examples/nsh/nsh_dbgcmds.c
+++ b/apps/nshlib/nsh_dbgcmds.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * examples/nsh/dbg_dbgcmds.c
+ * apps/nshlib/dbg_dbgcmds.c
  *
  *   Copyright (C) 2008-2009, 2011 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
diff --git a/nuttx/examples/nsh/nsh_ddcmd.c b/apps/nshlib/nsh_ddcmd.c
index d0457cbaa..c33a80ec0 100644
--- a/nuttx/examples/nsh/nsh_ddcmd.c
+++ b/apps/nshlib/nsh_ddcmd.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * examples/nsh/nsh_ddcmd.c
+ * apps/nshlib/nsh_ddcmd.c
  *
  *   Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
diff --git a/nuttx/examples/nsh/nsh_envcmds.c b/apps/nshlib/nsh_envcmds.c
index 1c701e46d..edb2693c4 100644
--- a/nuttx/examples/nsh/nsh_envcmds.c
+++ b/apps/nshlib/nsh_envcmds.c
@@ -1,7 +1,7 @@
 /****************************************************************************
- * nsh_envcmds.c
+ * apps/nshlib/nsh_envcmds.c
  *
- *   Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/nuttx/examples/nsh/nsh_fscmds.c b/apps/nshlib/nsh_fscmds.c
index 40f894ec8..4a471e65f 100644
--- a/nuttx/examples/nsh/nsh_fscmds.c
+++ b/apps/nshlib/nsh_fscmds.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * examples/nsh/nsh_fscmds.c
+ * apps/nshlib/nsh_fscmds.c
  *
  *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
diff --git a/apps/nshlib/nsh_main.c b/apps/nshlib/nsh_main.c
new file mode 100644
index 000000000..3437707a3
--- /dev/null
+++ b/apps/nshlib/nsh_main.c
@@ -0,0 +1,1299 @@
+/****************************************************************************
+ * apps/nshlib/nsh_main.c
+ *
+ *   Copyright (C) 2007-2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 <sys/stat.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sched.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <debug.h>
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
+#  include <pthread.h>
+#endif
+
+#ifdef CONFIG_EXAMPLES_NSH_BUILTIN_APPS
+#  include <apps/apps.h>
+#endif
+#include <apps/nsh.h>
+
+#include "nsh.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/* Argument list size
+ *
+ *   argv[0]:      The command name. 
+ *   argv[1]:      The beginning of argument (up to NSH_MAX_ARGUMENTS)
+ *   argv[argc-3]: Possibly '>' or '>>'
+ *   argv[argc-2]: Possibly <file>
+ *   argv[argc-1]: Possibly '&' (if pthreads are enabled)
+ *   argv[argc]:   NULL terminating pointer
+ *
+ * Maximum size is NSH_MAX_ARGUMENTS+5
+ */
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
+#  define MAX_ARGV_ENTRIES (NSH_MAX_ARGUMENTS+5)
+#else
+#  define MAX_ARGV_ENTRIES (NSH_MAX_ARGUMENTS+4)
+#endif
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct cmdmap_s
+{
+  const char *cmd;        /* Name of the command */
+  cmd_t       handler;    /* Function that handles the command */
+  uint8_t     minargs;    /* Minimum number of arguments (including command) */
+  uint8_t     maxargs;    /* Maximum number of arguments (including command) */
+  const char *usage;      /* Usage instructions for 'help' command */
+};
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
+struct cmdarg_s
+{
+  FAR struct nsh_vtbl_s *vtbl;      /* For front-end interaction */
+  int fd;                           /* FD for output redirection */
+  int argc;                         /* Number of arguments in argv */
+  FAR char *argv[MAX_ARGV_ENTRIES]; /* Argument list */
+};
+#endif
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLE_HELP
+  static int cmd_help(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
+#endif
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLE_EXIT
+  static int cmd_exit(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
+#endif
+static int cmd_unrecognized(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static const char g_delim[]      = " \t\n";
+static const char g_redirect1[]  = ">";
+static const char g_redirect2[]  = ">>";
+static const char g_exitstatus[] = "$?";
+static const char g_success[]    = "0";
+static const char g_failure[]    = "1";
+
+static const struct cmdmap_s g_cmdmap[] =
+{
+#if !defined(CONFIG_EXAMPLES_NSH_DISABLESCRIPT) && !defined(CONFIG_EXAMPLES_NSH_DISABLE_TEST)
+  { "[",        cmd_lbracket, 4, NSH_MAX_ARGUMENTS, "<expression> ]" },
+#endif
+
+#if CONFIG_NFILE_DESCRIPTORS > 0
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_CAT
+  { "cat",      cmd_cat,      2, NSH_MAX_ARGUMENTS, "<path> [<path> [<path> ...]]" },
+# endif
+#ifndef CONFIG_DISABLE_ENVIRON
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_CD
+  { "cd",       cmd_cd,       1, 2, "[<dir-path>|-|~|..]" },
+# endif
+#endif
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_CP
+  { "cp",       cmd_cp,       3, 3, "<source-path> <dest-path>" },
+# endif
+#endif
+
+#if CONFIG_NFILE_DESCRIPTORS > 0
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_LS
+  { "dd",       cmd_dd,       3, 6, "if=<infile> of=<outfile> [bs=<sectsize>] [count=<sectors>] [skip=<sectors>]" },
+# endif
+#endif
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLE_ECHO
+# ifndef CONFIG_DISABLE_ENVIRON
+  { "echo",     cmd_echo,     0, NSH_MAX_ARGUMENTS, "[<string|$name> [<string|$name>...]]" },
+# else
+  { "echo",     cmd_echo,     0, NSH_MAX_ARGUMENTS, "[<string> [<string>...]]" },
+# endif
+#endif
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLE_EXEC
+  { "exec",     cmd_exec,     2, 3, "<hex-address>" },
+#endif
+#ifndef CONFIG_EXAMPLES_NSH_DISABLE_EXIT
+  { "exit",     cmd_exit,     1, 1, NULL },
+#endif
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLE_FREE
+  { "free",     cmd_free,     1, 1, NULL },
+#endif
+
+#if defined(CONFIG_NET_UDP) && CONFIG_NFILE_DESCRIPTORS > 0
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_GET
+  { "get",      cmd_get,      4, 7, "[-b|-n] [-f <local-path>] -h <ip-address> <remote-path>" },
+# endif
+#endif
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLE_HELP
+  { "help",     cmd_help,     1, 1, NULL },
+#endif
+
+#ifdef CONFIG_NET
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_IFCONFIG
+  { "ifconfig", cmd_ifconfig, 1, 1, NULL },
+# endif
+#endif
+
+#ifndef CONFIG_DISABLE_SIGNALS
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_SLEEP
+  { "kill",     cmd_kill,     3, 3, "-<signal> <pid>" },
+# endif
+#endif
+
+#if CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_DISABLE_MOUNTPOINT)
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_LOSETUP
+  { "losetup",   cmd_losetup, 3, 6, "[-d <dev-path>] | [[-o <offset>] [-r] <dev-path> <file-path>]" },
+# endif
+#endif
+
+#if CONFIG_NFILE_DESCRIPTORS > 0
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_LS
+  { "ls",       cmd_ls,       1, 5, "[-lRs] <dir-path>" },
+# endif
+#endif
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLE_MB
+  { "mb",       cmd_mb,       2, 3, "<hex-address>[=<hex-value>][ <hex-byte-count>]" },
+#endif
+
+#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_FS_WRITABLE)
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_MKDIR
+  { "mkdir",    cmd_mkdir,    2, 2, "<path>" },
+# endif
+#endif
+
+#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_FS_FAT)
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_MKFATFS
+  { "mkfatfs",  cmd_mkfatfs,  2, 2, "<path>" },
+# endif
+#endif
+
+#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_MKFIFO
+  { "mkfifo",   cmd_mkfifo,   2, 2, "<path>" },
+# endif
+#endif
+
+#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_FS_WRITABLE)
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_MKRD
+  { "mkrd",     cmd_mkrd,     2, 6, "[-m <minor>] [-s <sector-size>] <nsectors>" },
+# endif
+#endif
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLE_MH
+  { "mh",       cmd_mh,       2, 3, "<hex-address>[=<hex-value>][ <hex-byte-count>]" },
+#endif
+
+#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_FS_READABLE)
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_MOUNT
+  { "mount",    cmd_mount,    4, 5, "-t <fstype> <block-device> <dir-path>" },
+# endif
+#endif
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLE_MW
+  { "mw",       cmd_mw,       2, 3, "<hex-address>[=<hex-value>][ <hex-byte-count>]" },
+#endif
+
+#if defined(CONFIG_NET) && defined(CONFIG_NET_ICMP) && defined(CONFIG_NET_ICMP_PING) && \
+   !defined(CONFIG_DISABLE_CLOCK) && !defined(CONFIG_DISABLE_SIGNALS)
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_PING
+  { "ping",     cmd_ping,     2, 6, "[-c <count>] [-i <interval>] <ip-address>" },
+# endif
+#endif
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLE_PS
+  { "ps",       cmd_ps,       1, 1, NULL },
+#endif
+
+#if defined(CONFIG_NET_UDP) && CONFIG_NFILE_DESCRIPTORS > 0
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_PUT
+  { "put",      cmd_put,      4, 7, "[-b|-n] [-f <remote-path>] -h <ip-address> <local-path>" },
+# endif
+#endif
+
+#if CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_DISABLE_ENVIRON)
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_PWD
+  { "pwd",      cmd_pwd,      1, 1, NULL },
+# endif
+#endif
+
+#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_FS_WRITABLE)
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_RM
+  { "rm",       cmd_rm,       2, 2, "<file-path>" },
+# endif
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_RMDIR
+  { "rmdir",    cmd_rmdir,    2, 2, "<dir-path>" },
+# endif
+#endif
+
+#ifndef CONFIG_DISABLE_ENVIRON
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_SET
+  { "set",      cmd_set,      3, 3, "<name> <value>" },
+# endif
+#endif
+
+#if  CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0 && !defined(CONFIG_EXAMPLES_NSH_DISABLESCRIPT)
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_SH
+  { "sh",       cmd_sh,       2, 2, "<script-path>" },
+# endif
+#endif
+
+#ifndef CONFIG_DISABLE_SIGNALS
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_SLEEP
+  { "sleep",    cmd_sleep,    2, 2, "<sec>" },
+# endif
+#endif
+
+#if !defined(CONFIG_EXAMPLES_NSH_DISABLESCRIPT) && !defined(CONFIG_EXAMPLES_NSH_DISABLE_TEST)
+  { "test",     cmd_test,     3, NSH_MAX_ARGUMENTS, "<expression>" },
+#endif
+
+#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_FS_READABLE)
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_UMOUNT
+  { "umount",   cmd_umount,   2, 2, "<dir-path>" },
+# endif
+#endif
+
+#ifndef CONFIG_DISABLE_ENVIRON
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_UNSET
+  { "unset",    cmd_unset,    2, 2, "<name>" },
+# endif
+#endif
+
+#ifndef CONFIG_DISABLE_SIGNALS
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_USLEEP
+  { "usleep",   cmd_usleep,   2, 2, "<usec>" },
+# endif
+#endif
+
+#if defined(CONFIG_NET_TCP) && CONFIG_NFILE_DESCRIPTORS > 0
+# ifndef CONFIG_EXAMPLES_NSH_DISABLE_GET
+  { "wget",     cmd_wget,     2, 4, "[-o <local-path>] <url>" },
+# endif
+#endif
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLE_XD
+  { "xd",       cmd_xd,       3, 3, "<hex-address> <byte-count>" },
+#endif
+  { NULL,       NULL,         1, 1, NULL }
+};
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+const char g_nshgreeting[]       = "\nNuttShell (NSH)\n";
+const char g_nshprompt[]         = "nsh> ";
+const char g_nshsyntax[]         = "nsh: %s: syntax error\n";
+const char g_fmtargrequired[]    = "nsh: %s: missing required argument(s)\n";
+const char g_fmtarginvalid[]     = "nsh: %s: argument invalid\n";
+const char g_fmtargrange[]       = "nsh: %s: value out of range\n";
+const char g_fmtcmdnotfound[]    = "nsh: %s: command not found\n";
+const char g_fmtnosuch[]         = "nsh: %s: no such %s: %s\n";
+const char g_fmttoomanyargs[]    = "nsh: %s: too many arguments\n";
+const char g_fmtdeepnesting[]    = "nsh: %s: nesting too deep\n";
+const char g_fmtcontext[]        = "nsh: %s: not valid in this context\n";
+#ifdef CONFIG_EXAMPLES_NSH_STRERROR
+const char g_fmtcmdfailed[]      = "nsh: %s: %s failed: %s\n";
+#else
+const char g_fmtcmdfailed[]      = "nsh: %s: %s failed: %d\n";
+#endif
+const char g_fmtcmdoutofmemory[] = "nsh: %s: out of memory\n";
+const char g_fmtinternalerror[]  = "nsh: %s: Internal error\n";
+#ifndef CONFIG_DISABLE_SIGNALS
+const char g_fmtsignalrecvd[]    = "nsh: %s: Interrupted by signal\n";
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: cmd_help
+ ****************************************************************************/
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLE_HELP
+static int cmd_help(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
+{
+  const struct cmdmap_s *ptr;
+
+  nsh_output(vtbl, "NSH command forms:\n");
+#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
+  nsh_output(vtbl, "  [nice [-d <niceness>>]] <cmd> [> <file>|>> <file>] [&]\n");
+#else
+  nsh_output(vtbl, "  <cmd> [> <file>|>> <file>]\n");
+#endif
+#ifndef CONFIG_EXAMPLES_NSH_DISABLESCRIPT
+  nsh_output(vtbl, "OR\n");
+  nsh_output(vtbl, "  if <cmd>\n");
+  nsh_output(vtbl, "  then\n");
+  nsh_output(vtbl, "    [sequence of <cmd>]\n");
+  nsh_output(vtbl, "  else\n");
+  nsh_output(vtbl, "    [sequence of <cmd>]\n");
+  nsh_output(vtbl, "  fi\n");
+#endif
+  nsh_output(vtbl, "Where <cmd> is one of:\n");
+  for (ptr = g_cmdmap; ptr->cmd; ptr++)
+    {
+      if (ptr->usage)
+        {
+          nsh_output(vtbl, "  %s %s\n", ptr->cmd, ptr->usage);
+        }
+      else
+        {
+          nsh_output(vtbl, "  %s\n", ptr->cmd);
+        }
+    }
+  return OK;
+}
+#endif
+
+/****************************************************************************
+ * Name: cmd_unrecognized
+ ****************************************************************************/
+
+static int cmd_unrecognized(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
+{
+  nsh_output(vtbl, g_fmtcmdnotfound, argv[0]);
+  return ERROR;
+}
+
+/****************************************************************************
+ * Name: cmd_exit
+ ****************************************************************************/
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLE_EXIT
+static int cmd_exit(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
+{
+  nsh_exit(vtbl);
+  return OK;
+}
+#endif
+
+/****************************************************************************
+ * Name: nsh_execute
+ ****************************************************************************/
+
+static int nsh_execute(FAR struct nsh_vtbl_s *vtbl, int argc, char *argv[])
+{
+   const struct cmdmap_s *cmdmap;
+   const char            *cmd;
+   cmd_t                  handler = cmd_unrecognized;
+   int                    ret;
+
+   /* The form of argv is:
+    *
+    * argv[0]:      The command name.  This is argv[0] when the arguments
+    *               are, finally, received by the command vtblr
+    * argv[1]:      The beginning of argument (up to NSH_MAX_ARGUMENTS)
+    * argv[argc]:   NULL terminating pointer
+    */
+
+   cmd = argv[0];
+
+   /* See if the command is one that we understand */
+
+   for (cmdmap = g_cmdmap; cmdmap->cmd; cmdmap++)
+     {
+       if (strcmp(cmdmap->cmd, cmd) == 0)
+         {
+           /* Check if a valid number of arguments was provided.  We
+            * do this simple, imperfect checking here so that it does
+            * not have to be performed in each command.
+            */
+
+           if (argc < cmdmap->minargs)
+             {
+               /* Fewer than the minimum number were provided */
+
+               nsh_output(vtbl, g_fmtargrequired, cmd);
+               return ERROR;
+             }
+           else if (argc > cmdmap->maxargs)
+             {
+               /* More than the maximum number were provided */
+
+               nsh_output(vtbl, g_fmttoomanyargs, cmd);
+               return ERROR;
+             }
+           else
+             {
+               /* A valid number of arguments were provided (this does
+                * not mean they are right).
+                */
+
+               handler = cmdmap->handler;
+               break;
+             }
+         }
+     }
+
+   /* If the command was not found, then try to execute the command from
+    * a list of pre-built applications.
+    */
+
+#ifdef CONFIG_EXAMPLES_NSH_BUILTIN_APPS
+   if (handler == cmd_unrecognized && nsh_execapp(vtbl, cmd, argv) == OK)
+     {
+       /* The pre-built application was successfully started -- return OK.
+        * If not, then fall through to execute the cmd_nrecognized handler.
+        */
+
+       return OK;
+     }
+#endif
+
+   ret = handler(vtbl, argc, argv);
+   return ret;
+}
+
+/****************************************************************************
+ * Name: nsh_releaseargs
+ ****************************************************************************/
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
+static void nsh_releaseargs(struct cmdarg_s *arg)
+{
+  FAR struct nsh_vtbl_s *vtbl = arg->vtbl;
+  int i;
+
+  /* If the output was redirected, then file descriptor should
+   * be closed.  The created task has its one, independent copy of
+   * the file descriptor
+   */
+
+  if (vtbl->np.np_redirect)
+    {
+      (void)close(arg->fd);
+    }
+
+  /* Released the cloned vtbl instance */
+
+  nsh_release(vtbl);
+
+  /* Release the cloned args */
+
+  for (i = 0; i < arg->argc; i++)
+    {
+      free(arg->argv[i]);
+    }
+  free(arg);
+}
+#endif
+
+/****************************************************************************
+ * Name: nsh_child
+ ****************************************************************************/
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
+static pthread_addr_t nsh_child(pthread_addr_t arg)
+{
+  struct cmdarg_s *carg = (struct cmdarg_s *)arg;
+  int ret;
+
+  dbg("BG %s\n", carg->argv[0]);
+
+  /* Execute the specified command on the child thread */
+
+  ret = nsh_execute(carg->vtbl, carg->argc, carg->argv);
+
+  /* Released the cloned arguments */
+
+  dbg("BG %s complete\n", carg->argv[0]);
+  nsh_releaseargs(carg);
+  return (void*)ret;
+}
+#endif
+
+/****************************************************************************
+ * Name: nsh_cloneargs
+ ****************************************************************************/
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
+static inline struct cmdarg_s *nsh_cloneargs(FAR struct nsh_vtbl_s *vtbl,
+                                             int fd, int argc, char *argv[])
+{
+  struct cmdarg_s *ret = (struct cmdarg_s *)zalloc(sizeof(struct cmdarg_s));
+  int i;
+
+  if (ret)
+    {
+      ret->vtbl = vtbl;
+      ret->fd   = fd;
+      ret->argc = argc;
+
+      for (i = 0; i < argc; i++)
+        {
+          ret->argv[i] = strdup(argv[i]);
+        }
+    }
+  return ret;
+}
+#endif
+
+/****************************************************************************
+ * Name: nsh_argument
+ ****************************************************************************/
+
+char *nsh_argument(FAR struct nsh_vtbl_s *vtbl, char **saveptr)
+{
+  char *pbegin = *saveptr;
+  char *pend   = NULL;
+  const char *term;
+#ifndef CONFIG_DISABLE_ENVIRON
+  bool quoted = false;
+#endif
+
+  /* Find the beginning of the next token */
+
+  for (;
+       *pbegin && strchr(g_delim, *pbegin) != NULL;
+       pbegin++);
+
+  /* If we are at the end of the string with nothing
+   * but delimiters found, then return NULL.
+   */
+
+  if (!*pbegin)
+    {
+      return NULL;
+    }
+
+  /* Does the token begin with '>' -- redirection of output? */
+
+  if (*pbegin == '>')
+    {
+      /* Yes.. does it begin with ">>"? */
+
+      if (*(pbegin + 1) == '>')
+        {
+          *saveptr = pbegin + 2;
+          pbegin   = (char*)g_redirect2;
+        }
+      else
+        {
+          *saveptr = pbegin + 1;
+          pbegin   = (char*)g_redirect1;
+        }
+    }
+
+  /* Does the token begin with '#' -- comment */
+
+  else if (*pbegin == '#')
+    {
+      /* Return NULL meaning that we are at the end of the line */
+
+      *saveptr = pbegin;
+      pbegin   = NULL;
+    }
+  else
+    {
+      /* Otherwise, we are going to have to parse to find the end of
+       * the token.  Does the token begin with '"'?
+       */
+
+      if (*pbegin == '"')
+        {
+          /* Yes.. then only another '"' can terminate the string */
+
+          pbegin++;
+          term = "\"";
+#ifndef CONFIG_DISABLE_ENVIRON
+          quoted = true;
+#endif
+        }
+      else
+        {
+          /* No, then any of the usual terminators will terminate the argument */
+
+          term = g_delim;
+        }
+
+      /* Find the end of the string */
+
+      for (pend = pbegin + 1;
+           *pend && strchr(term, *pend) == NULL;
+           pend++);
+
+      /* pend either points to the end of the string or to
+       * the first delimiter after the string.
+       */
+
+      if (*pend)
+        {
+          /* Turn the delimiter into a null terminator */
+
+          *pend++ = '\0';
+        }
+
+      /* Save the pointer where we left off */
+
+      *saveptr = pend;
+
+#ifndef CONFIG_DISABLE_ENVIRON
+      /* Check for references to environment variables */
+
+      if (pbegin[0] == '$' && !quoted)
+        {
+          /* Check for built-in variables */
+
+          if (strcmp(pbegin, g_exitstatus) == 0)
+            {
+              if (vtbl->np.np_fail)
+                {
+                  return (char*)g_failure;
+                }
+              else
+                {
+                  return (char*)g_success;
+                }
+            }
+
+          /* Not a built-in? Return the value of the environment variable with this name */
+
+          else
+            {
+              char *value = getenv(pbegin+1);
+              if (value)
+                {
+                  return value;
+                }
+              else
+                {
+                  return (char*)"";
+                }
+            }
+        }
+#endif
+    }
+
+  /* Return the beginning of the token. */
+
+  return pbegin;
+}
+
+/****************************************************************************
+ * Name: nsh_cmdenabled
+ ****************************************************************************/
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLESCRIPT
+static inline bool nsh_cmdenabled(FAR struct nsh_vtbl_s *vtbl)
+{
+  struct nsh_parser_s *np = &vtbl->np;
+  bool ret = !np->np_st[np->np_ndx].ns_disabled;
+  if (ret)
+    {
+      switch (np->np_st[np->np_ndx].ns_state)
+        {
+          case NSH_PARSER_NORMAL :
+          case NSH_PARSER_IF:
+          default:
+            break;
+
+          case NSH_PARSER_THEN:
+            ret = !np->np_st[np->np_ndx].ns_ifcond;
+            break;
+
+          case NSH_PARSER_ELSE:
+            ret = np->np_st[np->np_ndx].ns_ifcond;
+            break;
+        }
+    }
+  return ret;
+}
+#endif
+
+/****************************************************************************
+ * Name: nsh_ifthenelse
+ ****************************************************************************/
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLESCRIPT
+static inline int nsh_ifthenelse(FAR struct nsh_vtbl_s *vtbl, FAR char **ppcmd, FAR char **saveptr)
+{
+  struct nsh_parser_s *np = &vtbl->np;
+  FAR char *cmd = *ppcmd;
+  bool disabled;
+
+  if (cmd)
+    {
+      /* Check if the command is preceeded by "if" */
+
+      if (strcmp(cmd, "if") == 0)
+        {
+          /* Get the cmd following the if */
+
+          *ppcmd = nsh_argument(vtbl, saveptr);
+          if (!*ppcmd)
+            {
+              nsh_output(vtbl, g_fmtarginvalid, "if");
+              goto errout;
+            }
+
+          /* Verify that "if" is valid in this context */
+
+          if (np->np_st[np->np_ndx].ns_state != NSH_PARSER_NORMAL &&
+              np->np_st[np->np_ndx].ns_state != NSH_PARSER_THEN &&
+              np->np_st[np->np_ndx].ns_state != NSH_PARSER_ELSE)
+            {
+              nsh_output(vtbl, g_fmtcontext, "if");
+              goto errout;
+            }
+
+          /* Check if we have exceeded the maximum depth of nesting */
+
+          if (np->np_ndx >= CONFIG_EXAMPLES_NSH_NESTDEPTH-1)
+            {
+              nsh_output(vtbl, g_fmtdeepnesting, "if");
+              goto errout;
+            }
+
+          /* "Push" the old state and set the new state */
+
+          disabled                          = !nsh_cmdenabled(vtbl);
+          np->np_ndx++;
+          np->np_st[np->np_ndx].ns_state    = NSH_PARSER_IF;
+          np->np_st[np->np_ndx].ns_disabled = disabled;
+          np->np_st[np->np_ndx].ns_ifcond   = false;
+        }
+      else if (strcmp(cmd, "then") == 0)
+        {
+          /* Get the cmd following the then -- there shouldn't be one */
+
+          *ppcmd = nsh_argument(vtbl, saveptr);
+          if (*ppcmd)
+            {
+              nsh_output(vtbl, g_fmtarginvalid, "then");
+              goto errout;
+            }
+
+          /* Verify that "then" is valid in this context */
+
+          if (np->np_st[np->np_ndx].ns_state != NSH_PARSER_IF)
+            {
+              nsh_output(vtbl, g_fmtcontext, "then");
+              goto errout;
+            }
+          np->np_st[np->np_ndx].ns_state = NSH_PARSER_THEN;
+        }
+      else if (strcmp(cmd, "else") == 0)
+        {
+          /* Get the cmd following the else -- there shouldn't be one */
+
+          *ppcmd = nsh_argument(vtbl, saveptr);
+          if (*ppcmd)
+            {
+              nsh_output(vtbl, g_fmtarginvalid, "else");
+              goto errout;
+            }
+
+          /* Verify that "then" is valid in this context */
+
+          if (np->np_st[np->np_ndx].ns_state != NSH_PARSER_THEN)
+            {
+              nsh_output(vtbl, g_fmtcontext, "else");
+              goto errout;
+            }
+          np->np_st[np->np_ndx].ns_state = NSH_PARSER_ELSE;
+        }
+      else if (strcmp(cmd, "fi") == 0)
+        {
+          /* Get the cmd following the fi -- there should be one */
+
+          *ppcmd = nsh_argument(vtbl, saveptr);
+          if (*ppcmd)
+            {
+              nsh_output(vtbl, g_fmtarginvalid, "fi");
+              goto errout;
+            }
+
+          /* Verify that "fi" is valid in this context */
+
+          if (np->np_st[np->np_ndx].ns_state != NSH_PARSER_THEN &&
+              np->np_st[np->np_ndx].ns_state != NSH_PARSER_ELSE)
+            {
+              nsh_output(vtbl, g_fmtcontext, "fi");
+              goto errout;
+            }
+
+          if (np->np_ndx < 1) /* Shouldn't happen */
+            {
+              nsh_output(vtbl, g_fmtinternalerror, "if");
+              goto errout;
+            }
+
+          /* "Pop" the previous state */
+
+          np->np_ndx--;
+        }
+      else if (np->np_st[np->np_ndx].ns_state == NSH_PARSER_IF)
+        {
+          nsh_output(vtbl, g_fmtcontext, cmd);
+          goto errout;
+        }
+    }
+  return OK;
+
+errout:
+  np->np_ndx               = 0;
+  np->np_st[0].ns_state    = NSH_PARSER_NORMAL;
+  np->np_st[0].ns_disabled = false;
+  np->np_st[0].ns_ifcond   = false;
+  return ERROR;
+}
+#endif
+
+/****************************************************************************
+ * Name: nsh_saveresult
+ ****************************************************************************/
+
+static inline int nsh_saveresult(FAR struct nsh_vtbl_s *vtbl, bool result)
+{
+  struct nsh_parser_s *np = &vtbl->np;
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLESCRIPT
+  if (np->np_st[np->np_ndx].ns_state == NSH_PARSER_IF)
+    {
+      np->np_fail = false;
+      np->np_st[np->np_ndx].ns_ifcond = result;
+      return OK;
+    }
+  else
+#endif
+    {
+      np->np_fail = result;
+      return result ? ERROR : OK;
+    }
+}
+
+/****************************************************************************
+ * Name: nsh_nice
+ ****************************************************************************/
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
+static inline int nsh_nice(FAR struct nsh_vtbl_s *vtbl, FAR char **ppcmd, FAR char **saveptr)
+{
+  FAR char *cmd = *ppcmd;
+
+  vtbl->np.np_nice = 0;
+  if (cmd)
+    {
+      /* Check if the command is preceded by "nice" */
+
+      if (strcmp(cmd, "nice") == 0)
+        {
+          /* Nicenesses range from -20 (most favorable scheduling) to 19
+           * (least  favorable).  Default is 10.
+           */
+
+          vtbl->np.np_nice = 10;
+
+          /* Get the cmd (or -d option of nice command) */
+
+          cmd = nsh_argument(vtbl, saveptr);
+          if (cmd && strcmp(cmd, "-d") == 0)
+            {
+              FAR char *val = nsh_argument(vtbl, saveptr);
+              if (val)
+                {
+                  char *endptr;
+                  vtbl->np.np_nice = (int)strtol(val, &endptr, 0);
+                  if (vtbl->np.np_nice > 19 || vtbl->np.np_nice < -20 ||
+                      endptr == val || *endptr != '\0')
+                    {
+                      nsh_output(vtbl, g_fmtarginvalid, "nice");
+                      return ERROR;
+                    }
+                  cmd = nsh_argument(vtbl, saveptr);
+                }
+            }
+
+          /* Return the real command name */
+
+          *ppcmd = cmd;
+        }
+    }
+  return OK;
+}
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nsh_initialize
+ ****************************************************************************/
+
+void nsh_initialize(void)
+{
+  /* Mount the /etc filesystem */
+
+  (void)nsh_romfsetc();
+
+  /* Perform architecture-specific initialization (if available) */
+
+  (void)nsh_archinitialize();
+
+  /* Bring up the network */
+
+  (void)nsh_netinit();
+}
+
+/****************************************************************************
+ * Name: nsh_parse
+ ****************************************************************************/
+
+int nsh_parse(FAR struct nsh_vtbl_s *vtbl, char *cmdline)
+{
+  FAR char *argv[MAX_ARGV_ENTRIES];
+  FAR char *saveptr;
+  FAR char *cmd;
+  FAR char *redirfile = NULL;
+  int       fd = -1;
+  int       oflags = 0;
+  int       argc;
+  int       ret;
+
+  /* Initialize parser state */
+
+  memset(argv, 0, MAX_ARGV_ENTRIES*sizeof(FAR char *));
+#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
+  vtbl->np.np_bg       = false;
+#endif
+  vtbl->np.np_redirect = false;
+
+  /* Parse out the command at the beginning of the line */
+
+  saveptr = cmdline;
+  cmd = nsh_argument(vtbl, &saveptr);
+
+  /* Handler if-then-else-fi */
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLESCRIPT
+  if (nsh_ifthenelse(vtbl, &cmd, &saveptr) != 0)
+    {
+      goto errout;
+    }
+#endif
+
+  /* Handle nice */
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
+  if (nsh_nice(vtbl, &cmd, &saveptr) != 0)
+    {
+      goto errout;
+    }
+#endif
+
+  /* Check if any command was provided -OR- if command processing is
+   * currently disabled.
+   */
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLESCRIPT
+  if (!cmd || !nsh_cmdenabled(vtbl))
+#else
+  if (!cmd)
+#endif
+    {
+      /* An empty line is not an error and an unprocessed command cannot
+       * generate an error, but neither should they change the last
+       * command status.
+       */
+
+      return OK;
+    }
+
+  /* Parse all of the arguments following the command name.  The form
+   * of argv is:
+   *
+   *   argv[0]:      The command name. 
+   *   argv[1]:      The beginning of argument (up to NSH_MAX_ARGUMENTS)
+   *   argv[argc-3]: Possibly '>' or '>>'
+   *   argv[argc-2]: Possibly <file>
+   *   argv[argc-1]: Possibly '&'
+   *   argv[argc]:   NULL terminating pointer
+   *
+   * Maximum size is NSH_MAX_ARGUMENTS+5
+   */
+
+  argv[0] = cmd;
+  for (argc = 1; argc < MAX_ARGV_ENTRIES-1; argc++)
+    {
+      argv[argc] = nsh_argument(vtbl, &saveptr);
+      if (!argv[argc])
+        {
+          break;
+        }
+    }
+  argv[argc] = NULL;
+
+  /* Check if the command should run in background */
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
+  if (argc > 1 && strcmp(argv[argc-1], "&") == 0)
+    {
+      vtbl->np.np_bg = true;
+      argv[argc-1] = NULL;
+      argc--;
+    }
+#endif
+
+
+  /* Check if the output was re-directed using > or >> */
+
+  if (argc > 2)
+    {
+      /* Check for redirection to a new file */
+
+      if (strcmp(argv[argc-2], g_redirect1) == 0)
+        {
+          vtbl->np.np_redirect = true;
+          oflags               = O_WRONLY|O_CREAT|O_TRUNC;
+          redirfile            = nsh_getfullpath(vtbl, argv[argc-1]);
+          argc                -= 2;
+        }
+
+      /* Check for redirection by appending to an existing file */
+
+      else if (strcmp(argv[argc-2], g_redirect2) == 0)
+        {
+          vtbl->np.np_redirect = true;
+          oflags               = O_WRONLY|O_CREAT|O_APPEND;
+          redirfile            = nsh_getfullpath(vtbl, argv[argc-1]);
+          argc                -= 2;
+        }
+    }
+
+  /* Redirected output? */
+
+  if (vtbl->np.np_redirect)
+    {
+      /* Open the redirection file.  This file will eventually
+       * be closed by a call to either nsh_release (if the command
+       * is executed in the background) or by nsh_undirect if the
+       * command is executed in the foreground.
+       */
+
+      fd = open(redirfile, oflags, 0666);
+      nsh_freefullpath(redirfile);
+      redirfile = NULL;
+
+      if (fd < 0)
+        {
+          nsh_output(vtbl, g_fmtcmdfailed, cmd, "open", NSH_ERRNO);
+          goto errout;
+        }
+    }
+
+  /* Check if the maximum number of arguments was exceeded */
+
+  if (argc > NSH_MAX_ARGUMENTS)
+    {
+      nsh_output(vtbl, g_fmttoomanyargs, cmd);
+    }
+
+  /* Handle the case where the command is executed in background.
+   * However is app is to be started as nuttapp new process will
+   * be created anyway, so skip this step. */
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
+  if (vtbl->np.np_bg
+#ifdef CONFIG_EXAMPLES_NSH_BUILTIN_APPS
+      && nuttapp_isavail(argv[0]) < 0     
+#endif
+  )
+    {
+      struct sched_param param;
+      struct nsh_vtbl_s *bkgvtbl;
+      struct cmdarg_s *args;
+      pthread_attr_t attr;
+      pthread_t thread;
+
+      /* Get a cloned copy of the vtbl with reference count=1.
+       * after the command has been processed, the nsh_release() call
+       * at the end of nsh_child() will destroy the clone.
+       */
+
+      bkgvtbl = nsh_clone(vtbl);
+      if (!bkgvtbl)
+        {
+          goto errout_with_redirect;
+        }
+
+      /* Create a container for the command arguments */
+
+      args = nsh_cloneargs(bkgvtbl, fd, argc, argv);
+      if (!args)
+        {
+          nsh_release(bkgvtbl);
+          goto errout_with_redirect;
+        }
+
+      /* Handle redirection of output via a file descriptor */
+
+      if (vtbl->np.np_redirect)
+        {
+          (void)nsh_redirect(bkgvtbl, fd, NULL);
+        }
+
+      /* Get the execution priority of this task */
+
+      ret = sched_getparam(0, &param);
+      if (ret != 0)
+        {
+          nsh_output(vtbl, g_fmtcmdfailed, cmd, "sched_getparm", NSH_ERRNO);
+          nsh_releaseargs(args);
+          nsh_release(bkgvtbl);
+          goto errout;
+        }
+
+      /* Determine the priority to execute the command */
+
+      if (vtbl->np.np_nice != 0)
+        {
+          int priority = param.sched_priority - vtbl->np.np_nice;
+          if (vtbl->np.np_nice < 0)
+            {
+              int max_priority = sched_get_priority_max(SCHED_NSH);
+              if (priority > max_priority)
+                {
+                  priority = max_priority;
+                }
+            }
+          else
+            {
+              int min_priority = sched_get_priority_min(SCHED_NSH);
+              if (priority < min_priority)
+                {
+                  priority = min_priority;
+                }
+            }
+          param.sched_priority = priority;
+        }
+
+      /* Set up the thread attributes */
+
+      (void)pthread_attr_init(&attr);
+      (void)pthread_attr_setschedpolicy(&attr, SCHED_NSH);
+      (void)pthread_attr_setschedparam(&attr, &param);
+
+      /* Execute the command as a separate thread at the appropriate priority */
+
+      ret = pthread_create(&thread, &attr, nsh_child, (pthread_addr_t)args);
+      if (ret != 0)
+        {
+          nsh_output(vtbl, g_fmtcmdfailed, cmd, "pthread_create", NSH_ERRNO_OF(ret));
+          nsh_releaseargs(args);
+          nsh_release(bkgvtbl);
+          goto errout;
+        }
+      nsh_output(vtbl, "%s [%d:%d]\n", cmd, thread, param.sched_priority);
+    }
+  else
+#endif
+    {
+      uint8_t save[SAVE_SIZE];
+
+      /* Handle redirection of output via a file descriptor */
+
+      if (vtbl->np.np_redirect)
+        {
+          nsh_redirect(vtbl, fd, save);
+        }
+
+      /* Then execute the command in "foreground" -- i.e., while the user waits
+       * for the next prompt.
+       */
+
+      ret = nsh_execute(vtbl, argc, argv);
+
+      /* Restore the original output.  Undirect will close the redirection
+       * file descriptor.
+       */
+
+      if (vtbl->np.np_redirect)
+        {
+          nsh_undirect(vtbl, save);
+        }
+
+      if (ret < 0)
+        {
+          goto errout;
+        }
+    }
+
+  /* Return success if the command succeeded (or at least, starting of the
+   * command task succeeded).
+   */
+
+  return nsh_saveresult(vtbl, false);
+
+#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
+errout_with_redirect:
+  if (vtbl->np.np_redirect)
+    {
+      close(fd);
+    }
+#endif
+errout:
+  return nsh_saveresult(vtbl, true);
+}
diff --git a/nuttx/examples/nsh/nsh_mmcmds.c b/apps/nshlib/nsh_mmcmds.c
index f2e572eb3..f2e218786 100644
--- a/nuttx/examples/nsh/nsh_mmcmds.c
+++ b/apps/nshlib/nsh_mmcmds.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * examples/nsh/dbg_mmcmds.c
+ * apps/nshlib/dbg_mmcmds.c
  *
  *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
diff --git a/nuttx/examples/nsh/nsh_netcmds.c b/apps/nshlib/nsh_netcmds.c
index 77caeea82..44fea2e2a 100644
--- a/nuttx/examples/nsh/nsh_netcmds.c
+++ b/apps/nshlib/nsh_netcmds.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * examples/nsh/nsh_netcmds.c
+ * apps/nshlib/nsh_netcmds.c
  *
  *   Copyright (C) 2007-2011 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
diff --git a/nuttx/examples/nsh/nsh_netinit.c b/apps/nshlib/nsh_netinit.c
index 356cc268e..eb0052cc7 100644
--- a/nuttx/examples/nsh/nsh_netinit.c
+++ b/apps/nshlib/nsh_netinit.c
@@ -1,7 +1,7 @@
 /****************************************************************************
- * examples/nsh/nsh_netinit.c
+ * apps/nshlib/nsh_netinit.c
  *
- *   Copyright (C) 2010 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2010-2011 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
  *
  * This is influenced by similar logic from uIP:
diff --git a/nuttx/examples/nsh/nsh_proccmds.c b/apps/nshlib/nsh_proccmds.c
index 5c3f6db60..b49e114ae 100644
--- a/nuttx/examples/nsh/nsh_proccmds.c
+++ b/apps/nshlib/nsh_proccmds.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * examples/nsh/nsh_proccmds.c
+ * apps/nshlib/nsh_proccmds.c
  *
  *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
diff --git a/nuttx/examples/nsh/nsh_romfsetc.c b/apps/nshlib/nsh_romfsetc.c
index 482a3618c..ec8300de4 100644
--- a/nuttx/examples/nsh/nsh_romfsetc.c
+++ b/apps/nshlib/nsh_romfsetc.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * examples/nsh/nsh_romfsetc.c
+ * apps/nshlib/nsh_romfsetc.c
  *
  *   Copyright (C) 2008-2011 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
diff --git a/nuttx/examples/nsh/nsh_romfsimg.h b/apps/nshlib/nsh_romfsimg.h
index 49b0ad166..49b0ad166 100644
--- a/nuttx/examples/nsh/nsh_romfsimg.h
+++ b/apps/nshlib/nsh_romfsimg.h
diff --git a/nuttx/examples/nsh/nsh_serial.c b/apps/nshlib/nsh_serial.c
index 0704cf080..54e6fff4c 100644
--- a/nuttx/examples/nsh/nsh_serial.c
+++ b/apps/nshlib/nsh_serial.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * examples/nsh/nsh_serial.c
+ * apps/nshlib/nsh_serial.c
  *
  *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
diff --git a/nuttx/examples/nsh/nsh_telnetd.c b/apps/nshlib/nsh_telnetd.c
index 9776124f6..6cf9c188b 100644
--- a/nuttx/examples/nsh/nsh_telnetd.c
+++ b/apps/nshlib/nsh_telnetd.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * examples/nsh/nsh_telnetd.c
+ * apps/nshlib/nsh_telnetd.c
  *
  *   Copyright (C) 2007-2011 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
diff --git a/nuttx/examples/nsh/nsh_test.c b/apps/nshlib/nsh_test.c
index fb76b473d..594887b18 100644
--- a/nuttx/examples/nsh/nsh_test.c
+++ b/apps/nshlib/nsh_test.c
@@ -1,7 +1,7 @@
 /****************************************************************************
- * examples/nsh/nsh_test.c
+ * apps/nshlib/nsh_test.c
  *
- *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2008, 2011 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
  *
  * Redistribution and use in source and binary forms, with or without
diff --git a/nuttx/examples/nsh/rcS.template b/apps/nshlib/rcS.template
index 996f37fb1..996f37fb1 100644
--- a/nuttx/examples/nsh/rcS.template
+++ b/apps/nshlib/rcS.template
diff --git a/nuttx/configs/avr32dev1/nsh/appconfig b/nuttx/configs/avr32dev1/nsh/appconfig
new file mode 100644
index 000000000..a34eda375
--- /dev/null
+++ b/nuttx/configs/avr32dev1/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# avrdev1/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/detron/nsh/appconfig b/nuttx/configs/detron/nsh/appconfig
new file mode 100644
index 000000000..57fd74915
--- /dev/null
+++ b/nuttx/configs/detron/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# detron/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/ea3131/nsh/appconfig b/nuttx/configs/ea3131/nsh/appconfig
new file mode 100644
index 000000000..878ce1853
--- /dev/null
+++ b/nuttx/configs/ea3131/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# ea3131/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/eagle100/nsh/appconfig b/nuttx/configs/eagle100/nsh/appconfig
new file mode 100644
index 000000000..97028d4c3
--- /dev/null
+++ b/nuttx/configs/eagle100/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# eagle100/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/ez80f910200zco/nsh/appconfig b/nuttx/configs/ez80f910200zco/nsh/appconfig
new file mode 100644
index 000000000..db733c0ba
--- /dev/null
+++ b/nuttx/configs/ez80f910200zco/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# ez80f910200zco/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/lm3s6965-ek/nsh/appconfig b/nuttx/configs/lm3s6965-ek/nsh/appconfig
new file mode 100644
index 000000000..d4f8c3ad6
--- /dev/null
+++ b/nuttx/configs/lm3s6965-ek/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# lm3s6965-ek/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/lm3s8962-ek/nsh/appconfig b/nuttx/configs/lm3s8962-ek/nsh/appconfig
new file mode 100644
index 000000000..4c5c6d157
--- /dev/null
+++ b/nuttx/configs/lm3s8962-ek/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# lm3s8962-ek/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/mbed/nsh/appconfig b/nuttx/configs/mbed/nsh/appconfig
new file mode 100644
index 000000000..3563dcc63
--- /dev/null
+++ b/nuttx/configs/mbed/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# mbed/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/mcu123-lpc214x/nsh/appconfig b/nuttx/configs/mcu123-lpc214x/nsh/appconfig
new file mode 100644
index 000000000..439fa9c7f
--- /dev/null
+++ b/nuttx/configs/mcu123-lpc214x/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# mcu123-lpc214x/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/ntosd-dm320/nsh/appconfig b/nuttx/configs/ntosd-dm320/nsh/appconfig
new file mode 100644
index 000000000..f43f12058
--- /dev/null
+++ b/nuttx/configs/ntosd-dm320/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# ntosd-dm320/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/nucleus2g/nsh/appconfig b/nuttx/configs/nucleus2g/nsh/appconfig
new file mode 100644
index 000000000..7c6dd08f8
--- /dev/null
+++ b/nuttx/configs/nucleus2g/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# nucleus2g/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/olimex-lpc1766stk/nsh/appconfig b/nuttx/configs/olimex-lpc1766stk/nsh/appconfig
new file mode 100644
index 000000000..58b0c3b53
--- /dev/null
+++ b/nuttx/configs/olimex-lpc1766stk/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# olimex-lpc1766stk/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/olimex-lpc2378/nsh/appconfig b/nuttx/configs/olimex-lpc2378/nsh/appconfig
new file mode 100644
index 000000000..21d8d346e
--- /dev/null
+++ b/nuttx/configs/olimex-lpc2378/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# olimex-lpc2378/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/olimex-strp711/nsh/appconfig b/nuttx/configs/olimex-strp711/nsh/appconfig
new file mode 100644
index 000000000..b8fc1d238
--- /dev/null
+++ b/nuttx/configs/olimex-strp711/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# olimex-strp711/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/qemu-i486/nsh/appconfig b/nuttx/configs/qemu-i486/nsh/appconfig
new file mode 100644
index 000000000..6ad247659
--- /dev/null
+++ b/nuttx/configs/qemu-i486/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# qemu-i486/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/sam3u-ek/nsh/appconfig b/nuttx/configs/sam3u-ek/nsh/appconfig
new file mode 100644
index 000000000..2ce871372
--- /dev/null
+++ b/nuttx/configs/sam3u-ek/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# sam3u-ek/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/sim/nsh/appconfig b/nuttx/configs/sim/nsh/appconfig
new file mode 100644
index 000000000..6e5816518
--- /dev/null
+++ b/nuttx/configs/sim/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# sim/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/stm3210e-eval/nsh/appconfig b/nuttx/configs/stm3210e-eval/nsh/appconfig
new file mode 100644
index 000000000..2b6c43302
--- /dev/null
+++ b/nuttx/configs/stm3210e-eval/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# stm3210e-eval/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/us7032evb1/nsh/appconfig b/nuttx/configs/us7032evb1/nsh/appconfig
new file mode 100644
index 000000000..b3d0be81a
--- /dev/null
+++ b/nuttx/configs/us7032evb1/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# us7032evb1/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/vsn/nsh/appconfig b/nuttx/configs/vsn/nsh/appconfig
index 71883c3fa..d946c07a3 100755
--- a/nuttx/configs/vsn/nsh/appconfig
+++ b/nuttx/configs/vsn/nsh/appconfig
@@ -37,4 +37,6 @@
 
 # Add the list of built-in apps needed by this configuration
 
-CONFIGURED_APPS += hello/.built_always poweroff/.built_always jvm/.built_always
+CONFIGURED_APPS += hello/.built_always poweroff/.built_always \
+	sdcard/.built_always ramtron/.built_always nshlib/.built_always
+
diff --git a/nuttx/configs/xtrs/nsh/appconfig b/nuttx/configs/xtrs/nsh/appconfig
new file mode 100644
index 000000000..7325820e9
--- /dev/null
+++ b/nuttx/configs/xtrs/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# xtrs/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/configs/z80sim/nsh/appconfig b/nuttx/configs/z80sim/nsh/appconfig
new file mode 100644
index 000000000..acd2aa82d
--- /dev/null
+++ b/nuttx/configs/z80sim/nsh/appconfig
@@ -0,0 +1,36 @@
+############################################################################

+# z80sim/nsh/appconfig

+#

+#   Copyright (C) 2011 Gregory Nutt. All rights reserved.

+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

+#

+# 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.

+#

+############################################################################

+

+CONFIGURED_APPS += nshlib/.built_always
\ No newline at end of file
diff --git a/nuttx/examples/README.txt b/nuttx/examples/README.txt
index 534530d52..83b0c5667 100644
--- a/nuttx/examples/README.txt
+++ b/nuttx/examples/README.txt
@@ -132,10 +132,10 @@ examples/netttest
 examples/nsh
 ^^^^^^^^^^^^
 
-  This directory contains the NuttShell (NSH).  This is a simple
-  shell application.  With some additional development, NSH will
-  someday be a great NuttX application debugger.  NSH is described
-  in its own README located at examples/nsh/README.txt
+  This directory provides an example of how to configure and use
+  the NuttShell (NSH) application.  NSH is a simple shell
+  application.  NSH is described in its own README located at
+  apps/nshlib/README.txt
 
 examples/nx
 ^^^^^^^^^^^
diff --git a/nuttx/examples/nsh/Makefile b/nuttx/examples/nsh/Makefile
index 99e6f6b03..3ef915cb7 100644
--- a/nuttx/examples/nsh/Makefile
+++ b/nuttx/examples/nsh/Makefile
@@ -1,7 +1,7 @@
 ############################################################################
 # examples/nsh/Makefile
 #
-#   Copyright (C) 2007-2008, 2010 Gregory Nutt. All rights reserved.
+#   Copyright (C) 2007-2008, 2010-2011 Gregory Nutt. All rights reserved.
 #   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
 #
 # Redistribution and use in source and binary forms, with or without
@@ -37,32 +37,7 @@
 -include $(TOPDIR)/Make.defs
 
 ASRCS	= 
-CSRCS	= nsh_main.c nsh_fscmds.c nsh_ddcmd.c nsh_proccmds.c nsh_mmcmds.c \
-		nsh_envcmds.c nsh_dbgcmds.c
-
-ifeq ($(CONFIG_EXAMPLES_NSH_BUILTIN_APPS),y)
-CSRCS	+= nsh_apps.c
-endif
-
-ifeq ($(CONFIG_EXAMPLES_NSH_ROMFSETC),y)
-CSRCS	+= nsh_romfsetc.c
-endif
-
-ifeq ($(CONFIG_NET),y)
-CSRCS	+= nsh_netinit.c nsh_netcmds.c
-endif
-
-ifeq ($(CONFIG_EXAMPLES_NSH_CONSOLE),y)
-CSRCS	+= nsh_serial.c
-endif
-
-ifeq ($(CONFIG_EXAMPLES_NSH_TELNET),y)
-CSRCS	+= nsh_telnetd.c
-endif
-
-ifneq ($(CONFIG_EXAMPLES_NSH_DISABLESCRIPT),y)
-CSRCS	+= nsh_test.c
-endif
+CSRCS	= nsh_main.c
 
 AOBJS	= $(ASRCS:.S=$(OBJEXT))
 COBJS	= $(CSRCS:.c=$(OBJEXT))
diff --git a/nuttx/examples/nsh/nsh_main.c b/nuttx/examples/nsh/nsh_main.c
index 2544baf5b..fc6c9b0f9 100644
--- a/nuttx/examples/nsh/nsh_main.c
+++ b/nuttx/examples/nsh/nsh_main.c
@@ -40,948 +40,41 @@
 #include <nuttx/config.h>
 
 #include <sys/stat.h>
-
 #include <stdint.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
 #include <sched.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <debug.h>
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
-#  include <pthread.h>
-#endif
 
-#ifdef CONFIG_EXAMPLES_NSH_BUILTIN_APPS
-#  include <apps/apps.h>
-#endif
 #include <apps/nsh.h>
 
-#include "nsh.h"
-
 /****************************************************************************
- * Definitions
+ * Pre-processor Definitions
  ****************************************************************************/
 
-/* Argument list size
- *
- *   argv[0]:      The command name. 
- *   argv[1]:      The beginning of argument (up to NSH_MAX_ARGUMENTS)
- *   argv[argc-3]: Possibly '>' or '>>'
- *   argv[argc-2]: Possibly <file>
- *   argv[argc-1]: Possibly '&' (if pthreads are enabled)
- *   argv[argc]:   NULL terminating pointer
- *
- * Maximum size is NSH_MAX_ARGUMENTS+5
- */
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
-#  define MAX_ARGV_ENTRIES (NSH_MAX_ARGUMENTS+5)
-#else
-#  define MAX_ARGV_ENTRIES (NSH_MAX_ARGUMENTS+4)
-#endif
-
-#if CONFIG_RR_INTERVAL > 0
-# define SCHED_NSH SCHED_RR
-#else
-# define SCHED_NSH SCHED_FIFO
+#ifndef CONFIG_BUILTIN_APPS
+#  warning "This example requires CONFIG_BUILTIN_APPS..."
+#  warning "  You must have an appconfig file in your config directory to use this example"
 #endif
 
 /****************************************************************************
  * Private Types
  ****************************************************************************/
 
-struct cmdmap_s
-{
-  const char *cmd;        /* Name of the command */
-  cmd_t       handler;    /* Function that handles the command */
-  uint8_t     minargs;    /* Minimum number of arguments (including command) */
-  uint8_t     maxargs;    /* Maximum number of arguments (including command) */
-  const char *usage;      /* Usage instructions for 'help' command */
-};
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
-struct cmdarg_s
-{
-  FAR struct nsh_vtbl_s *vtbl;      /* For front-end interaction */
-  int fd;                           /* FD for output redirection */
-  int argc;                         /* Number of arguments in argv */
-  FAR char *argv[MAX_ARGV_ENTRIES]; /* Argument list */
-};
-#endif
-
 /****************************************************************************
  * Private Function Prototypes
  ****************************************************************************/
 
-#ifndef CONFIG_EXAMPLES_NSH_DISABLE_HELP
-  static int cmd_help(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
-#endif
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLE_EXIT
-  static int cmd_exit(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
-#endif
-static int cmd_unrecognized(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
-
 /****************************************************************************
  * Private Data
  ****************************************************************************/
 
-static const char g_delim[]      = " \t\n";
-static const char g_redirect1[]  = ">";
-static const char g_redirect2[]  = ">>";
-static const char g_exitstatus[] = "$?";
-static const char g_success[]    = "0";
-static const char g_failure[]    = "1";
-
-static const struct cmdmap_s g_cmdmap[] =
-{
-#if !defined(CONFIG_EXAMPLES_NSH_DISABLESCRIPT) && !defined(CONFIG_EXAMPLES_NSH_DISABLE_TEST)
-  { "[",        cmd_lbracket, 4, NSH_MAX_ARGUMENTS, "<expression> ]" },
-#endif
-
-#if CONFIG_NFILE_DESCRIPTORS > 0
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_CAT
-  { "cat",      cmd_cat,      2, NSH_MAX_ARGUMENTS, "<path> [<path> [<path> ...]]" },
-# endif
-#ifndef CONFIG_DISABLE_ENVIRON
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_CD
-  { "cd",       cmd_cd,       1, 2, "[<dir-path>|-|~|..]" },
-# endif
-#endif
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_CP
-  { "cp",       cmd_cp,       3, 3, "<source-path> <dest-path>" },
-# endif
-#endif
-
-#if CONFIG_NFILE_DESCRIPTORS > 0
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_LS
-  { "dd",       cmd_dd,       3, 6, "if=<infile> of=<outfile> [bs=<sectsize>] [count=<sectors>] [skip=<sectors>]" },
-# endif
-#endif
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLE_ECHO
-# ifndef CONFIG_DISABLE_ENVIRON
-  { "echo",     cmd_echo,     0, NSH_MAX_ARGUMENTS, "[<string|$name> [<string|$name>...]]" },
-# else
-  { "echo",     cmd_echo,     0, NSH_MAX_ARGUMENTS, "[<string> [<string>...]]" },
-# endif
-#endif
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLE_EXEC
-  { "exec",     cmd_exec,     2, 3, "<hex-address>" },
-#endif
-#ifndef CONFIG_EXAMPLES_NSH_DISABLE_EXIT
-  { "exit",     cmd_exit,     1, 1, NULL },
-#endif
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLE_FREE
-  { "free",     cmd_free,     1, 1, NULL },
-#endif
-
-#if defined(CONFIG_NET_UDP) && CONFIG_NFILE_DESCRIPTORS > 0
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_GET
-  { "get",      cmd_get,      4, 7, "[-b|-n] [-f <local-path>] -h <ip-address> <remote-path>" },
-# endif
-#endif
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLE_HELP
-  { "help",     cmd_help,     1, 1, NULL },
-#endif
-
-#ifdef CONFIG_NET
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_IFCONFIG
-  { "ifconfig", cmd_ifconfig, 1, 1, NULL },
-# endif
-#endif
-
-#ifndef CONFIG_DISABLE_SIGNALS
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_SLEEP
-  { "kill",     cmd_kill,     3, 3, "-<signal> <pid>" },
-# endif
-#endif
-
-#if CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_DISABLE_MOUNTPOINT)
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_LOSETUP
-  { "losetup",   cmd_losetup, 3, 6, "[-d <dev-path>] | [[-o <offset>] [-r] <dev-path> <file-path>]" },
-# endif
-#endif
-
-#if CONFIG_NFILE_DESCRIPTORS > 0
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_LS
-  { "ls",       cmd_ls,       1, 5, "[-lRs] <dir-path>" },
-# endif
-#endif
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLE_MB
-  { "mb",       cmd_mb,       2, 3, "<hex-address>[=<hex-value>][ <hex-byte-count>]" },
-#endif
-
-#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_FS_WRITABLE)
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_MKDIR
-  { "mkdir",    cmd_mkdir,    2, 2, "<path>" },
-# endif
-#endif
-
-#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_FS_FAT)
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_MKFATFS
-  { "mkfatfs",  cmd_mkfatfs,  2, 2, "<path>" },
-# endif
-#endif
-
-#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_MKFIFO
-  { "mkfifo",   cmd_mkfifo,   2, 2, "<path>" },
-# endif
-#endif
-
-#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_FS_WRITABLE)
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_MKRD
-  { "mkrd",     cmd_mkrd,     2, 6, "[-m <minor>] [-s <sector-size>] <nsectors>" },
-# endif
-#endif
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLE_MH
-  { "mh",       cmd_mh,       2, 3, "<hex-address>[=<hex-value>][ <hex-byte-count>]" },
-#endif
-
-#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_FS_READABLE)
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_MOUNT
-  { "mount",    cmd_mount,    4, 5, "-t <fstype> <block-device> <dir-path>" },
-# endif
-#endif
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLE_MW
-  { "mw",       cmd_mw,       2, 3, "<hex-address>[=<hex-value>][ <hex-byte-count>]" },
-#endif
-
-#if defined(CONFIG_NET) && defined(CONFIG_NET_ICMP) && defined(CONFIG_NET_ICMP_PING) && \
-   !defined(CONFIG_DISABLE_CLOCK) && !defined(CONFIG_DISABLE_SIGNALS)
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_PING
-  { "ping",     cmd_ping,     2, 6, "[-c <count>] [-i <interval>] <ip-address>" },
-# endif
-#endif
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLE_PS
-  { "ps",       cmd_ps,       1, 1, NULL },
-#endif
-
-#if defined(CONFIG_NET_UDP) && CONFIG_NFILE_DESCRIPTORS > 0
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_PUT
-  { "put",      cmd_put,      4, 7, "[-b|-n] [-f <remote-path>] -h <ip-address> <local-path>" },
-# endif
-#endif
-
-#if CONFIG_NFILE_DESCRIPTORS > 0 && !defined(CONFIG_DISABLE_ENVIRON)
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_PWD
-  { "pwd",      cmd_pwd,      1, 1, NULL },
-# endif
-#endif
-
-#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_FS_WRITABLE)
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_RM
-  { "rm",       cmd_rm,       2, 2, "<file-path>" },
-# endif
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_RMDIR
-  { "rmdir",    cmd_rmdir,    2, 2, "<dir-path>" },
-# endif
-#endif
-
-#ifndef CONFIG_DISABLE_ENVIRON
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_SET
-  { "set",      cmd_set,      3, 3, "<name> <value>" },
-# endif
-#endif
-
-#if  CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0 && !defined(CONFIG_EXAMPLES_NSH_DISABLESCRIPT)
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_SH
-  { "sh",       cmd_sh,       2, 2, "<script-path>" },
-# endif
-#endif
-
-#ifndef CONFIG_DISABLE_SIGNALS
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_SLEEP
-  { "sleep",    cmd_sleep,    2, 2, "<sec>" },
-# endif
-#endif
-
-#if !defined(CONFIG_EXAMPLES_NSH_DISABLESCRIPT) && !defined(CONFIG_EXAMPLES_NSH_DISABLE_TEST)
-  { "test",     cmd_test,     3, NSH_MAX_ARGUMENTS, "<expression>" },
-#endif
-
-#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0 && defined(CONFIG_FS_READABLE)
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_UMOUNT
-  { "umount",   cmd_umount,   2, 2, "<dir-path>" },
-# endif
-#endif
-
-#ifndef CONFIG_DISABLE_ENVIRON
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_UNSET
-  { "unset",    cmd_unset,    2, 2, "<name>" },
-# endif
-#endif
-
-#ifndef CONFIG_DISABLE_SIGNALS
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_USLEEP
-  { "usleep",   cmd_usleep,   2, 2, "<usec>" },
-# endif
-#endif
-
-#if defined(CONFIG_NET_TCP) && CONFIG_NFILE_DESCRIPTORS > 0
-# ifndef CONFIG_EXAMPLES_NSH_DISABLE_GET
-  { "wget",     cmd_wget,     2, 4, "[-o <local-path>] <url>" },
-# endif
-#endif
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLE_XD
-  { "xd",       cmd_xd,       3, 3, "<hex-address> <byte-count>" },
-#endif
-  { NULL,       NULL,         1, 1, NULL }
-};
-
 /****************************************************************************
  * Public Data
  ****************************************************************************/
 
-const char g_nshgreeting[]       = "\nNuttShell (NSH)\n";
-const char g_nshprompt[]         = "nsh> ";
-const char g_nshsyntax[]         = "nsh: %s: syntax error\n";
-const char g_fmtargrequired[]    = "nsh: %s: missing required argument(s)\n";
-const char g_fmtarginvalid[]     = "nsh: %s: argument invalid\n";
-const char g_fmtargrange[]       = "nsh: %s: value out of range\n";
-const char g_fmtcmdnotfound[]    = "nsh: %s: command not found\n";
-const char g_fmtnosuch[]         = "nsh: %s: no such %s: %s\n";
-const char g_fmttoomanyargs[]    = "nsh: %s: too many arguments\n";
-const char g_fmtdeepnesting[]    = "nsh: %s: nesting too deep\n";
-const char g_fmtcontext[]        = "nsh: %s: not valid in this context\n";
-#ifdef CONFIG_EXAMPLES_NSH_STRERROR
-const char g_fmtcmdfailed[]      = "nsh: %s: %s failed: %s\n";
-#else
-const char g_fmtcmdfailed[]      = "nsh: %s: %s failed: %d\n";
-#endif
-const char g_fmtcmdoutofmemory[] = "nsh: %s: out of memory\n";
-const char g_fmtinternalerror[]  = "nsh: %s: Internal error\n";
-#ifndef CONFIG_DISABLE_SIGNALS
-const char g_fmtsignalrecvd[]    = "nsh: %s: Interrupted by signal\n";
-#endif
-
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
 
 /****************************************************************************
- * Name: cmd_help
- ****************************************************************************/
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLE_HELP
-static int cmd_help(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
-{
-  const struct cmdmap_s *ptr;
-
-  nsh_output(vtbl, "NSH command forms:\n");
-#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
-  nsh_output(vtbl, "  [nice [-d <niceness>>]] <cmd> [> <file>|>> <file>] [&]\n");
-#else
-  nsh_output(vtbl, "  <cmd> [> <file>|>> <file>]\n");
-#endif
-#ifndef CONFIG_EXAMPLES_NSH_DISABLESCRIPT
-  nsh_output(vtbl, "OR\n");
-  nsh_output(vtbl, "  if <cmd>\n");
-  nsh_output(vtbl, "  then\n");
-  nsh_output(vtbl, "    [sequence of <cmd>]\n");
-  nsh_output(vtbl, "  else\n");
-  nsh_output(vtbl, "    [sequence of <cmd>]\n");
-  nsh_output(vtbl, "  fi\n");
-#endif
-  nsh_output(vtbl, "Where <cmd> is one of:\n");
-  for (ptr = g_cmdmap; ptr->cmd; ptr++)
-    {
-      if (ptr->usage)
-        {
-          nsh_output(vtbl, "  %s %s\n", ptr->cmd, ptr->usage);
-        }
-      else
-        {
-          nsh_output(vtbl, "  %s\n", ptr->cmd);
-        }
-    }
-  return OK;
-}
-#endif
-
-/****************************************************************************
- * Name: cmd_unrecognized
- ****************************************************************************/
-
-static int cmd_unrecognized(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
-{
-  nsh_output(vtbl, g_fmtcmdnotfound, argv[0]);
-  return ERROR;
-}
-
-/****************************************************************************
- * Name: cmd_exit
- ****************************************************************************/
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLE_EXIT
-static int cmd_exit(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
-{
-  nsh_exit(vtbl);
-  return OK;
-}
-#endif
-
-/****************************************************************************
- * Name: nsh_execute
- ****************************************************************************/
-
-static int nsh_execute(FAR struct nsh_vtbl_s *vtbl, int argc, char *argv[])
-{
-   const struct cmdmap_s *cmdmap;
-   const char            *cmd;
-   cmd_t                  handler = cmd_unrecognized;
-   int                    ret;
-
-   /* The form of argv is:
-    *
-    * argv[0]:      The command name.  This is argv[0] when the arguments
-    *               are, finally, received by the command vtblr
-    * argv[1]:      The beginning of argument (up to NSH_MAX_ARGUMENTS)
-    * argv[argc]:   NULL terminating pointer
-    */
-
-   cmd = argv[0];
-
-   /* See if the command is one that we understand */
-
-   for (cmdmap = g_cmdmap; cmdmap->cmd; cmdmap++)
-     {
-       if (strcmp(cmdmap->cmd, cmd) == 0)
-         {
-           /* Check if a valid number of arguments was provided.  We
-            * do this simple, imperfect checking here so that it does
-            * not have to be performed in each command.
-            */
-
-           if (argc < cmdmap->minargs)
-             {
-               /* Fewer than the minimum number were provided */
-
-               nsh_output(vtbl, g_fmtargrequired, cmd);
-               return ERROR;
-             }
-           else if (argc > cmdmap->maxargs)
-             {
-               /* More than the maximum number were provided */
-
-               nsh_output(vtbl, g_fmttoomanyargs, cmd);
-               return ERROR;
-             }
-           else
-             {
-               /* A valid number of arguments were provided (this does
-                * not mean they are right).
-                */
-
-               handler = cmdmap->handler;
-               break;
-             }
-         }
-     }
-
-   /* If the command was not found, then try to execute the command from
-    * a list of pre-built applications.
-    */
-
-#ifdef CONFIG_EXAMPLES_NSH_BUILTIN_APPS
-   if (handler == cmd_unrecognized && nsh_execapp(vtbl, cmd, argv) == OK)
-     {
-       /* The pre-built application was successfully started -- return OK.
-        * If not, then fall through to execute the cmd_nrecognized handler.
-        */
-
-       return OK;
-     }
-#endif
-
-   ret = handler(vtbl, argc, argv);
-   return ret;
-}
-
-/****************************************************************************
- * Name: nsh_releaseargs
- ****************************************************************************/
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
-static void nsh_releaseargs(struct cmdarg_s *arg)
-{
-  FAR struct nsh_vtbl_s *vtbl = arg->vtbl;
-  int i;
-
-  /* If the output was redirected, then file descriptor should
-   * be closed.  The created task has its one, independent copy of
-   * the file descriptor
-   */
-
-  if (vtbl->np.np_redirect)
-    {
-      (void)close(arg->fd);
-    }
-
-  /* Released the cloned vtbl instance */
-
-  nsh_release(vtbl);
-
-  /* Release the cloned args */
-
-  for (i = 0; i < arg->argc; i++)
-    {
-      free(arg->argv[i]);
-    }
-  free(arg);
-}
-#endif
-
-/****************************************************************************
- * Name: nsh_child
- ****************************************************************************/
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
-static pthread_addr_t nsh_child(pthread_addr_t arg)
-{
-  struct cmdarg_s *carg = (struct cmdarg_s *)arg;
-  int ret;
-
-  dbg("BG %s\n", carg->argv[0]);
-
-  /* Execute the specified command on the child thread */
-
-  ret = nsh_execute(carg->vtbl, carg->argc, carg->argv);
-
-  /* Released the cloned arguments */
-
-  dbg("BG %s complete\n", carg->argv[0]);
-  nsh_releaseargs(carg);
-  return (void*)ret;
-}
-#endif
-
-/****************************************************************************
- * Name: nsh_cloneargs
- ****************************************************************************/
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
-static inline struct cmdarg_s *nsh_cloneargs(FAR struct nsh_vtbl_s *vtbl,
-                                             int fd, int argc, char *argv[])
-{
-  struct cmdarg_s *ret = (struct cmdarg_s *)zalloc(sizeof(struct cmdarg_s));
-  int i;
-
-  if (ret)
-    {
-      ret->vtbl = vtbl;
-      ret->fd   = fd;
-      ret->argc = argc;
-
-      for (i = 0; i < argc; i++)
-        {
-          ret->argv[i] = strdup(argv[i]);
-        }
-    }
-  return ret;
-}
-#endif
-
-/****************************************************************************
- * Name: nsh_argument
- ****************************************************************************/
-
-char *nsh_argument(FAR struct nsh_vtbl_s *vtbl, char **saveptr)
-{
-  char *pbegin = *saveptr;
-  char *pend   = NULL;
-  const char *term;
-#ifndef CONFIG_DISABLE_ENVIRON
-  bool quoted = false;
-#endif
-
-  /* Find the beginning of the next token */
-
-  for (;
-       *pbegin && strchr(g_delim, *pbegin) != NULL;
-       pbegin++);
-
-  /* If we are at the end of the string with nothing
-   * but delimiters found, then return NULL.
-   */
-
-  if (!*pbegin)
-    {
-      return NULL;
-    }
-
-  /* Does the token begin with '>' -- redirection of output? */
-
-  if (*pbegin == '>')
-    {
-      /* Yes.. does it begin with ">>"? */
-
-      if (*(pbegin + 1) == '>')
-        {
-          *saveptr = pbegin + 2;
-          pbegin   = (char*)g_redirect2;
-        }
-      else
-        {
-          *saveptr = pbegin + 1;
-          pbegin   = (char*)g_redirect1;
-        }
-    }
-
-  /* Does the token begin with '#' -- comment */
-
-  else if (*pbegin == '#')
-    {
-      /* Return NULL meaning that we are at the end of the line */
-
-      *saveptr = pbegin;
-      pbegin   = NULL;
-    }
-  else
-    {
-      /* Otherwise, we are going to have to parse to find the end of
-       * the token.  Does the token begin with '"'?
-       */
-
-      if (*pbegin == '"')
-        {
-          /* Yes.. then only another '"' can terminate the string */
-
-          pbegin++;
-          term = "\"";
-#ifndef CONFIG_DISABLE_ENVIRON
-          quoted = true;
-#endif
-        }
-      else
-        {
-          /* No, then any of the usual terminators will terminate the argument */
-
-          term = g_delim;
-        }
-
-      /* Find the end of the string */
-
-      for (pend = pbegin + 1;
-           *pend && strchr(term, *pend) == NULL;
-           pend++);
-
-      /* pend either points to the end of the string or to
-       * the first delimiter after the string.
-       */
-
-      if (*pend)
-        {
-          /* Turn the delimiter into a null terminator */
-
-          *pend++ = '\0';
-        }
-
-      /* Save the pointer where we left off */
-
-      *saveptr = pend;
-
-#ifndef CONFIG_DISABLE_ENVIRON
-      /* Check for references to environment variables */
-
-      if (pbegin[0] == '$' && !quoted)
-        {
-          /* Check for built-in variables */
-
-          if (strcmp(pbegin, g_exitstatus) == 0)
-            {
-              if (vtbl->np.np_fail)
-                {
-                  return (char*)g_failure;
-                }
-              else
-                {
-                  return (char*)g_success;
-                }
-            }
-
-          /* Not a built-in? Return the value of the environment variable with this name */
-
-          else
-            {
-              char *value = getenv(pbegin+1);
-              if (value)
-                {
-                  return value;
-                }
-              else
-                {
-                  return (char*)"";
-                }
-            }
-        }
-#endif
-    }
-
-  /* Return the beginning of the token. */
-
-  return pbegin;
-}
-
-/****************************************************************************
- * Name: nsh_cmdenabled
- ****************************************************************************/
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLESCRIPT
-static inline bool nsh_cmdenabled(FAR struct nsh_vtbl_s *vtbl)
-{
-  struct nsh_parser_s *np = &vtbl->np;
-  bool ret = !np->np_st[np->np_ndx].ns_disabled;
-  if (ret)
-    {
-      switch (np->np_st[np->np_ndx].ns_state)
-        {
-          case NSH_PARSER_NORMAL :
-          case NSH_PARSER_IF:
-          default:
-            break;
-
-          case NSH_PARSER_THEN:
-            ret = !np->np_st[np->np_ndx].ns_ifcond;
-            break;
-
-          case NSH_PARSER_ELSE:
-            ret = np->np_st[np->np_ndx].ns_ifcond;
-            break;
-        }
-    }
-  return ret;
-}
-#endif
-
-/****************************************************************************
- * Name: nsh_ifthenelse
- ****************************************************************************/
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLESCRIPT
-static inline int nsh_ifthenelse(FAR struct nsh_vtbl_s *vtbl, FAR char **ppcmd, FAR char **saveptr)
-{
-  struct nsh_parser_s *np = &vtbl->np;
-  FAR char *cmd = *ppcmd;
-  bool disabled;
-
-  if (cmd)
-    {
-      /* Check if the command is preceeded by "if" */
-
-      if (strcmp(cmd, "if") == 0)
-        {
-          /* Get the cmd following the if */
-
-          *ppcmd = nsh_argument(vtbl, saveptr);
-          if (!*ppcmd)
-            {
-              nsh_output(vtbl, g_fmtarginvalid, "if");
-              goto errout;
-            }
-
-          /* Verify that "if" is valid in this context */
-
-          if (np->np_st[np->np_ndx].ns_state != NSH_PARSER_NORMAL &&
-              np->np_st[np->np_ndx].ns_state != NSH_PARSER_THEN &&
-              np->np_st[np->np_ndx].ns_state != NSH_PARSER_ELSE)
-            {
-              nsh_output(vtbl, g_fmtcontext, "if");
-              goto errout;
-            }
-
-          /* Check if we have exceeded the maximum depth of nesting */
-
-          if (np->np_ndx >= CONFIG_EXAMPLES_NSH_NESTDEPTH-1)
-            {
-              nsh_output(vtbl, g_fmtdeepnesting, "if");
-              goto errout;
-            }
-
-          /* "Push" the old state and set the new state */
-
-          disabled                          = !nsh_cmdenabled(vtbl);
-          np->np_ndx++;
-          np->np_st[np->np_ndx].ns_state    = NSH_PARSER_IF;
-          np->np_st[np->np_ndx].ns_disabled = disabled;
-          np->np_st[np->np_ndx].ns_ifcond   = false;
-        }
-      else if (strcmp(cmd, "then") == 0)
-        {
-          /* Get the cmd following the then -- there shouldn't be one */
-
-          *ppcmd = nsh_argument(vtbl, saveptr);
-          if (*ppcmd)
-            {
-              nsh_output(vtbl, g_fmtarginvalid, "then");
-              goto errout;
-            }
-
-          /* Verify that "then" is valid in this context */
-
-          if (np->np_st[np->np_ndx].ns_state != NSH_PARSER_IF)
-            {
-              nsh_output(vtbl, g_fmtcontext, "then");
-              goto errout;
-            }
-          np->np_st[np->np_ndx].ns_state = NSH_PARSER_THEN;
-        }
-      else if (strcmp(cmd, "else") == 0)
-        {
-          /* Get the cmd following the else -- there shouldn't be one */
-
-          *ppcmd = nsh_argument(vtbl, saveptr);
-          if (*ppcmd)
-            {
-              nsh_output(vtbl, g_fmtarginvalid, "else");
-              goto errout;
-            }
-
-          /* Verify that "then" is valid in this context */
-
-          if (np->np_st[np->np_ndx].ns_state != NSH_PARSER_THEN)
-            {
-              nsh_output(vtbl, g_fmtcontext, "else");
-              goto errout;
-            }
-          np->np_st[np->np_ndx].ns_state = NSH_PARSER_ELSE;
-        }
-      else if (strcmp(cmd, "fi") == 0)
-        {
-          /* Get the cmd following the fi -- there should be one */
-
-          *ppcmd = nsh_argument(vtbl, saveptr);
-          if (*ppcmd)
-            {
-              nsh_output(vtbl, g_fmtarginvalid, "fi");
-              goto errout;
-            }
-
-          /* Verify that "fi" is valid in this context */
-
-          if (np->np_st[np->np_ndx].ns_state != NSH_PARSER_THEN &&
-              np->np_st[np->np_ndx].ns_state != NSH_PARSER_ELSE)
-            {
-              nsh_output(vtbl, g_fmtcontext, "fi");
-              goto errout;
-            }
-
-          if (np->np_ndx < 1) /* Shouldn't happen */
-            {
-              nsh_output(vtbl, g_fmtinternalerror, "if");
-              goto errout;
-            }
-
-          /* "Pop" the previous state */
-
-          np->np_ndx--;
-        }
-      else if (np->np_st[np->np_ndx].ns_state == NSH_PARSER_IF)
-        {
-          nsh_output(vtbl, g_fmtcontext, cmd);
-          goto errout;
-        }
-    }
-  return OK;
-
-errout:
-  np->np_ndx               = 0;
-  np->np_st[0].ns_state    = NSH_PARSER_NORMAL;
-  np->np_st[0].ns_disabled = false;
-  np->np_st[0].ns_ifcond   = false;
-  return ERROR;
-}
-#endif
-
-/****************************************************************************
- * Name: nsh_saveresult
- ****************************************************************************/
-
-static inline int nsh_saveresult(FAR struct nsh_vtbl_s *vtbl, bool result)
-{
-  struct nsh_parser_s *np = &vtbl->np;
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLESCRIPT
-  if (np->np_st[np->np_ndx].ns_state == NSH_PARSER_IF)
-    {
-      np->np_fail = false;
-      np->np_st[np->np_ndx].ns_ifcond = result;
-      return OK;
-    }
-  else
-#endif
-    {
-      np->np_fail = result;
-      return result ? ERROR : OK;
-    }
-}
-
-/****************************************************************************
- * Name: nsh_nice
- ****************************************************************************/
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
-static inline int nsh_nice(FAR struct nsh_vtbl_s *vtbl, FAR char **ppcmd, FAR char **saveptr)
-{
-  FAR char *cmd = *ppcmd;
-
-  vtbl->np.np_nice = 0;
-  if (cmd)
-    {
-      /* Check if the command is preceded by "nice" */
-
-      if (strcmp(cmd, "nice") == 0)
-        {
-          /* Nicenesses range from -20 (most favorable scheduling) to 19
-           * (least  favorable).  Default is 10.
-           */
-
-          vtbl->np.np_nice = 10;
-
-          /* Get the cmd (or -d option of nice command) */
-
-          cmd = nsh_argument(vtbl, saveptr);
-          if (cmd && strcmp(cmd, "-d") == 0)
-            {
-              FAR char *val = nsh_argument(vtbl, saveptr);
-              if (val)
-                {
-                  char *endptr;
-                  vtbl->np.np_nice = (int)strtol(val, &endptr, 0);
-                  if (vtbl->np.np_nice > 19 || vtbl->np.np_nice < -20 ||
-                      endptr == val || *endptr != '\0')
-                    {
-                      nsh_output(vtbl, g_fmtarginvalid, "nice");
-                      return ERROR;
-                    }
-                  cmd = nsh_argument(vtbl, saveptr);
-                }
-            }
-
-          /* Return the real command name */
-
-          *ppcmd = cmd;
-        }
-    }
-  return OK;
-}
-#endif
-
-/****************************************************************************
  * Public Functions
  ****************************************************************************/
 
@@ -1012,17 +105,9 @@ int user_start(int argc, char *argv[])
   int ret;
 #endif
 
-  /* Mount the /etc filesystem */
-
-  (void)nsh_romfsetc();
-
-  /* Perform architecture-specific initialization (if available) */
-
-  (void)nsh_archinitialize();
+  /* Initialize the NSH library */
 
-  /* Bring up the network */
-
-  (void)nsh_netinit();
+  nsh_initialize();
 
   /* Set the priority of this task to something in the middle so that 'nice'
    * can both raise and lower the priority.
@@ -1064,303 +149,3 @@ int user_start(int argc, char *argv[])
   return nsh_consolemain(0, NULL);
 #endif
 }
-
-/****************************************************************************
- * Name: nsh_parse
- ****************************************************************************/
-
-int nsh_parse(FAR struct nsh_vtbl_s *vtbl, char *cmdline)
-{
-  FAR char *argv[MAX_ARGV_ENTRIES];
-  FAR char *saveptr;
-  FAR char *cmd;
-  FAR char *redirfile = NULL;
-  int       fd = -1;
-  int       oflags = 0;
-  int       argc;
-  int       ret;
-
-  /* Initialize parser state */
-
-  memset(argv, 0, MAX_ARGV_ENTRIES*sizeof(FAR char *));
-#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
-  vtbl->np.np_bg       = false;
-#endif
-  vtbl->np.np_redirect = false;
-
-  /* Parse out the command at the beginning of the line */
-
-  saveptr = cmdline;
-  cmd = nsh_argument(vtbl, &saveptr);
-
-  /* Handler if-then-else-fi */
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLESCRIPT
-  if (nsh_ifthenelse(vtbl, &cmd, &saveptr) != 0)
-    {
-      goto errout;
-    }
-#endif
-
-  /* Handle nice */
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
-  if (nsh_nice(vtbl, &cmd, &saveptr) != 0)
-    {
-      goto errout;
-    }
-#endif
-
-  /* Check if any command was provided -OR- if command processing is
-   * currently disabled.
-   */
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLESCRIPT
-  if (!cmd || !nsh_cmdenabled(vtbl))
-#else
-  if (!cmd)
-#endif
-    {
-      /* An empty line is not an error and an unprocessed command cannot
-       * generate an error, but neither should they change the last
-       * command status.
-       */
-
-      return OK;
-    }
-
-  /* Parse all of the arguments following the command name.  The form
-   * of argv is:
-   *
-   *   argv[0]:      The command name. 
-   *   argv[1]:      The beginning of argument (up to NSH_MAX_ARGUMENTS)
-   *   argv[argc-3]: Possibly '>' or '>>'
-   *   argv[argc-2]: Possibly <file>
-   *   argv[argc-1]: Possibly '&'
-   *   argv[argc]:   NULL terminating pointer
-   *
-   * Maximum size is NSH_MAX_ARGUMENTS+5
-   */
-
-  argv[0] = cmd;
-  for (argc = 1; argc < MAX_ARGV_ENTRIES-1; argc++)
-    {
-      argv[argc] = nsh_argument(vtbl, &saveptr);
-      if (!argv[argc])
-        {
-          break;
-        }
-    }
-  argv[argc] = NULL;
-
-  /* Check if the command should run in background */
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
-  if (argc > 1 && strcmp(argv[argc-1], "&") == 0)
-    {
-      vtbl->np.np_bg = true;
-      argv[argc-1] = NULL;
-      argc--;
-    }
-#endif
-
-
-  /* Check if the output was re-directed using > or >> */
-
-  if (argc > 2)
-    {
-      /* Check for redirection to a new file */
-
-      if (strcmp(argv[argc-2], g_redirect1) == 0)
-        {
-          vtbl->np.np_redirect = true;
-          oflags               = O_WRONLY|O_CREAT|O_TRUNC;
-          redirfile            = nsh_getfullpath(vtbl, argv[argc-1]);
-          argc                -= 2;
-        }
-
-      /* Check for redirection by appending to an existing file */
-
-      else if (strcmp(argv[argc-2], g_redirect2) == 0)
-        {
-          vtbl->np.np_redirect = true;
-          oflags               = O_WRONLY|O_CREAT|O_APPEND;
-          redirfile            = nsh_getfullpath(vtbl, argv[argc-1]);
-          argc                -= 2;
-        }
-    }
-
-  /* Redirected output? */
-
-  if (vtbl->np.np_redirect)
-    {
-      /* Open the redirection file.  This file will eventually
-       * be closed by a call to either nsh_release (if the command
-       * is executed in the background) or by nsh_undirect if the
-       * command is executed in the foreground.
-       */
-
-      fd = open(redirfile, oflags, 0666);
-      nsh_freefullpath(redirfile);
-      redirfile = NULL;
-
-      if (fd < 0)
-        {
-          nsh_output(vtbl, g_fmtcmdfailed, cmd, "open", NSH_ERRNO);
-          goto errout;
-        }
-    }
-
-  /* Check if the maximum number of arguments was exceeded */
-
-  if (argc > NSH_MAX_ARGUMENTS)
-    {
-      nsh_output(vtbl, g_fmttoomanyargs, cmd);
-    }
-
-  /* Handle the case where the command is executed in background.
-   * However is app is to be started as nuttapp new process will
-   * be created anyway, so skip this step. */
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
-  if (vtbl->np.np_bg
-#ifdef CONFIG_EXAMPLES_NSH_BUILTIN_APPS
-      && nuttapp_isavail(argv[0]) < 0     
-#endif
-  )
-    {
-      struct sched_param param;
-      struct nsh_vtbl_s *bkgvtbl;
-      struct cmdarg_s *args;
-      pthread_attr_t attr;
-      pthread_t thread;
-
-      /* Get a cloned copy of the vtbl with reference count=1.
-       * after the command has been processed, the nsh_release() call
-       * at the end of nsh_child() will destroy the clone.
-       */
-
-      bkgvtbl = nsh_clone(vtbl);
-      if (!bkgvtbl)
-        {
-          goto errout_with_redirect;
-        }
-
-      /* Create a container for the command arguments */
-
-      args = nsh_cloneargs(bkgvtbl, fd, argc, argv);
-      if (!args)
-        {
-          nsh_release(bkgvtbl);
-          goto errout_with_redirect;
-        }
-
-      /* Handle redirection of output via a file descriptor */
-
-      if (vtbl->np.np_redirect)
-        {
-          (void)nsh_redirect(bkgvtbl, fd, NULL);
-        }
-
-      /* Get the execution priority of this task */
-
-      ret = sched_getparam(0, &param);
-      if (ret != 0)
-        {
-          nsh_output(vtbl, g_fmtcmdfailed, cmd, "sched_getparm", NSH_ERRNO);
-          nsh_releaseargs(args);
-          nsh_release(bkgvtbl);
-          goto errout;
-        }
-
-      /* Determine the priority to execute the command */
-
-      if (vtbl->np.np_nice != 0)
-        {
-          int priority = param.sched_priority - vtbl->np.np_nice;
-          if (vtbl->np.np_nice < 0)
-            {
-              int max_priority = sched_get_priority_max(SCHED_NSH);
-              if (priority > max_priority)
-                {
-                  priority = max_priority;
-                }
-            }
-          else
-            {
-              int min_priority = sched_get_priority_min(SCHED_NSH);
-              if (priority < min_priority)
-                {
-                  priority = min_priority;
-                }
-            }
-          param.sched_priority = priority;
-        }
-
-      /* Set up the thread attributes */
-
-      (void)pthread_attr_init(&attr);
-      (void)pthread_attr_setschedpolicy(&attr, SCHED_NSH);
-      (void)pthread_attr_setschedparam(&attr, &param);
-
-      /* Execute the command as a separate thread at the appropriate priority */
-
-      ret = pthread_create(&thread, &attr, nsh_child, (pthread_addr_t)args);
-      if (ret != 0)
-        {
-          nsh_output(vtbl, g_fmtcmdfailed, cmd, "pthread_create", NSH_ERRNO_OF(ret));
-          nsh_releaseargs(args);
-          nsh_release(bkgvtbl);
-          goto errout;
-        }
-      nsh_output(vtbl, "%s [%d:%d]\n", cmd, thread, param.sched_priority);
-    }
-  else
-#endif
-    {
-      uint8_t save[SAVE_SIZE];
-
-      /* Handle redirection of output via a file descriptor */
-
-      if (vtbl->np.np_redirect)
-        {
-          nsh_redirect(vtbl, fd, save);
-        }
-
-      /* Then execute the command in "foreground" -- i.e., while the user waits
-       * for the next prompt.
-       */
-
-      ret = nsh_execute(vtbl, argc, argv);
-
-      /* Restore the original output.  Undirect will close the redirection
-       * file descriptor.
-       */
-
-      if (vtbl->np.np_redirect)
-        {
-          nsh_undirect(vtbl, save);
-        }
-
-      if (ret < 0)
-        {
-          goto errout;
-        }
-    }
-
-  /* Return success if the command succeeded (or at least, starting of the
-   * command task succeeded).
-   */
-
-  return nsh_saveresult(vtbl, false);
-
-#ifndef CONFIG_EXAMPLES_NSH_DISABLEBG
-errout_with_redirect:
-  if (vtbl->np.np_redirect)
-    {
-      close(fd);
-    }
-#endif
-errout:
-  return nsh_saveresult(vtbl, true);
-}
diff --git a/nuttx/include/apps/nsh.h b/nuttx/include/apps/nsh.h
index d8e857841..6977e44bd 100644
--- a/nuttx/include/apps/nsh.h
+++ b/nuttx/include/apps/nsh.h
@@ -46,6 +46,12 @@
  * Pre-Processor Definitions
  ****************************************************************************/
 
+#if CONFIG_RR_INTERVAL > 0
+# define SCHED_NSH SCHED_RR
+#else
+# define SCHED_NSH SCHED_FIFO
+#endif
+
 /****************************************************************************
  * Public Data
  ****************************************************************************/
diff --git a/nuttx/sched/os_bringup.c b/nuttx/sched/os_bringup.c
index c9d84c223..64b4e9388 100644
--- a/nuttx/sched/os_bringup.c
+++ b/nuttx/sched/os_bringup.c
@@ -55,7 +55,7 @@
 # include "work_internal.h"
 #endif
 #ifdef CONFIG_BUILTIN_APPS
-# include "nuttx/nuttapp.h"
+# include "apps/apps.h"
 #endif
 
 /****************************************************************************
@@ -172,17 +172,3 @@ int os_bringup(void)
   ASSERT(init_taskid != ERROR);
   return OK;
 }
-
-
-Index: sched/os_bringup.c
-===================================================================
---- sched/os_bringup.c	(revision 3388)
-+++ sched/os_bringup.c	(working copy)
-@@ -154,7 +154,14 @@
-   svdbg("Starting init thread\n");
-   
- #if defined(CONFIG_BUILTIN_APPS_NUTTX) && defined(CONFIG_BUILTIN_APP_START)
--  init_taskid = exec_nuttapp(CONFIG_BUILTIN_APP_START, (const char **)NULL);
- #else
-   init_taskid = START_TASK("init", SCHED_PRIORITY_DEFAULT,
-                            CONFIG_USERMAIN_STACKSIZE,