forked from Archive/PX4-Autopilot
1215 lines
40 KiB
Plaintext
1215 lines
40 KiB
Plaintext
apps/nshlib
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^^^^^^^^^^^
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This directory contains the NuttShell (NSH) library. This library can be
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linked with other logic to provide a simple shell application for NuttX.
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- Console/NSH Front End
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- Command Overview
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- Conditional Command Execution
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- Built-In Variables
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- Current Working Directory
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Environment Variables
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- NSH Start-Up Script
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- Simple Commands
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- NSH Configuration Settings
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Command Dependencies on Configuration Settings
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NSH-Specific Configuration Settings
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- Common Problems
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Console/NSH Front End
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^^^^^^^^^^^^^^^^^^^^^
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Using settings in the configuration file, NSH may be configured to
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use either the serial stdin/out or a telnet connection as the console
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or BOTH. When NSH is started, you will see the following welcome on
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either console:
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NuttShell (NSH)
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nsh>
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'nsh>' is the NSH prompt and indicates that you may enter a command
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from the console.
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Command Overview
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^^^^^^^^^^^^^^^^
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This directory contains the NuttShell (NSH). This is a simple
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shell-like application. At present, NSH supports the following commands
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forms:
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Simple command: <cmd>
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Command with re-directed output: <cmd> > <file>
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<cmd> >> <file>
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Background command: <cmd> &
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Re-directed background command: <cmd> > <file> &
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<cmd> >> <file> &
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Where:
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<cmd> is any one of the simple commands listed later.
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<file> is the full or relative path to any writable object
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in the filesystem name space (file or character driver).
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Such objects will be referred to simply as files throughout
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this README.
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NSH executes at the mid-priority (128). Backgrounded commands can
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be made to execute at higher or lower priorities using nice:
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[nice [-d <niceness>>]] <cmd> [> <file>|>> <file>] [&]
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Where <niceness> is any value between -20 and 19 where lower
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(more negative values) correspond to higher priorities. The
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default niceness is 10.
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Conditional Command Execution
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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An if-then[-else]-fi construct is also supported in order to
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support conditional execution of commands. This works from the
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command line but is primarily intended for use within NSH scripts
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(see the sh commnd). The syntax is as follows:
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if <cmd>
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then
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[sequence of <cmd>]
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else
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[sequence of <cmd>]
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fi
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Built-In Variables
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^^^^^^^^^^^^^^^^^^
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$? - The result of the last simple command execution
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Current Working Directory
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^^^^^^^^^^^^^^^^^^^^^^^^^
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All path arguments to commands may be either an absolute path or a
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path relative to the current working directory. The current working
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directory is set using the 'cd' command and can be queried either
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by using the 'pwd' command or by using the 'echo $PWD' command.
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Environment Variables:
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----------------------
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PWD - The current working directory
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OLDPWD - The previous working directory
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NSH Start-Up Script
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^^^^^^^^^^^^^^^^^^^
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NSH supports options to provide a start up script for NSH. In general
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this capability is enabled with CONFIG_NSH_ROMFSETC, but has
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several other related configuration options as described in the final
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section of this README. This capability also depends on:
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- CONFIG_DISABLE_MOUNTPOINT not set
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- CONFIG_NFILE_DESCRIPTORS > 4
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- CONFIG_FS_ROMFS
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Default Start-Up Behavior
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-------------------------
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The implementation that is provided is intended to provide great flexibility
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for the use of Start-Up files. This paragraph will discuss the general
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behavior when all of the configuration options are set to the default
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values.
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In this default case, enabling CONFIG_NSH_ROMFSETC will cause
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NSH to behave as follows at NSH startup time:
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- NSH will create a read-only RAM disk (a ROM disk), containing a tiny
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ROMFS filesystem containing the following:
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|--init.d/
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`-- rcS
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Where rcS is the NSH start-up script
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- NSH will then mount the ROMFS filesystem at /etc, resulting in:
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|--dev/
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| `-- ram0
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`--etc/
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`--init.d/
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`-- rcS
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- By default, the contents of rcS script are:
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# Create a RAMDISK and mount it at XXXRDMOUNTPOUNTXXX
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mkrd -m 1 -s 512 1024
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mkfatfs /dev/ram1
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mount -t vfat /dev/ram1 /tmp
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- NSH will execute the script at /etc/init.d/rcS at start-up (before the
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first NSH prompt. After execution of the script, the root FS will look
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like:
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|--dev/
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| |-- ram0
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| `-- ram1
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|--etc/
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| `--init.d/
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| `-- rcS
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`--tmp/
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Modifying the ROMFS Image
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-------------------------
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The contents of the /etc directory are retained in the file
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apps/nshlib/nsh_romfsimg.h (OR, if CONFIG_NSH_ARCHROMFS
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is defined, include/arch/board/rcs.template). In order to modify
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the start-up behavior, there are three things to study:
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1. Configuration Options.
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The additional CONFIG_NSH_ROMFSETC configuration options
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discussed in the final section of this README.
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2. tools/mkromfsimg.sh Script.
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The script tools/mkromfsimg.sh creates nsh_romfsimg.h.
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It is not automatically executed. If you want to change the
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configuration settings associated with creating and mounting
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the /tmp directory, then it will be necessary to re-generate
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this header file using the mkromfsimg.sh script.
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The behavior of this script depends upon three things:
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- The configuration settings of the installed NuttX configuration.
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- The genromfs tool (available from http://romfs.sourceforge.net).
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- The file apps/nshlib/rcS.template (OR, if
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CONFIG_NSH_ARCHROMFS is defined, include/arch/board/rcs.template)
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3. rcS.template.
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The file apps/nshlib/rcS.template contains the general form
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of the rcS file; configured values are plugged into this
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template file to produce the final rcS file.
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NOTE:
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apps/nshlib/rcS.template generates the standard, default
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nsh_romfsimg.h file. If CONFIG_NSH_ARCHROMFS is defined
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in the NuttX configuration file, then a custom, board-specific
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nsh_romfsimg.h file residing in configs/<board>/include will be
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used. NOTE when the OS is configured, include/arch/board will
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be linked to configs/<board>/include.
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All of the startup-behavior is contained in rcS.template. The
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role of mkromfsimg.sh is to (1) apply the specific configuration
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settings to rcS.template to create the final rcS, and (2) to
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generate the header file nsh_romfsimg.h containg the ROMFS
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file system image.
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Simple Commands
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^^^^^^^^^^^^^^^
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o [ <expression> ]
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o test <expression>
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These are two alternative forms of the same command. They support
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evaluation of a boolean expression which sets $?. This command
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is used most frequently as the conditional command following the
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'if' in the if-then[-else]-fi construct.
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Expression Syntax:
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------------------
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expression = simple-expression | !expression |
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expression -o expression | expression -a expression
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simple-expression = unary-expression | binary-expression
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unary-expression = string-unary | file-unary
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string-unary = -n string | -z string
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file-unary = -b file | -c file | -d file | -e file | -f file |
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-r file | -s file | -w file
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binary-expression = string-binary | numeric-binary
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string-binary = string = string | string == string | string != string
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numeric-binary = integer -eq integer | integer -ge integer |
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integer -gt integer | integer -le integer |
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integer -lt integer | integer -ne integer
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o base64dec [-w] [-f] <string or filepath>
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o base64dec [-w] [-f] <string or filepath>
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o cat <path> [<path> [<path> ...]]
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This command copies and concatentates all of the files at <path>
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to the console (or to another file if the output is redirected).
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o cd [<dir-path>|-|~|..]
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Changes the current working directory (PWD). Also sets the
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previous working directory environment variable (OLDPWD).
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FORMS:
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------
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'cd <dir-path>' sets the current working directory to <dir-path>.
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'cd -' sets the current working directory to the previous
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working directory ($OLDPWD). Equivalent to 'cd $OLDPWD'.
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'cd' or 'cd ~' set the current working directory to the 'home'
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directory. The 'home' directory can be configured by setting
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CONFIG_LIB_HOMEDIR in the configuration file. The default
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'home' directory is '/'.
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'cd ..' sets the current working directory to the parent directory.
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o cp <source-path> <dest-path>
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Copy of the contents of the file at <source-path> to the location
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in the filesystem indicated by <path-path>
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o date [-s "MMM DD HH:MM:SS YYYY"]
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Show or set the current date and time. This command is only supported
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if the platform supported RTC hardware (CONFIG_RTC=y).
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Only one format is used both on display and when setting the date/time:
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MMM DD HH:MM:SS YYYY. For example,
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data -s "Sep 1 11:30:00 2011"
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24-hour time format is assumed.
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o dd if=<infile> of=<outfile> [bs=<sectsize>] [count=<sectors>] [skip=<sectors>]
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Copy blocks from <infile> to <outfile>. <nfile> or <outfile> may
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be the path to a standard file, a character device, or a block device.
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Examples:
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1. Read from character device, write to regular file. This will
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create a new file of the specified size filled with zero.
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nsh> dd if=/dev/zero of=/tmp/zeros bs=64 count=16
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nsh> ls -l /tmp
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/tmp:
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-rw-rw-rw- 1024 ZEROS
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2. Read from character device, write to block device. This will
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fill the entire block device with zeros.
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nsh> ls -l /dev
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/dev:
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brw-rw-rw- 0 ram0
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crw-rw-rw- 0 zero
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nsh> dd if=/dev/zero of=/dev/ram0
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3. Read from a block devic, write to a character device. This
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will read the entire block device and dump the contents in
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the bit bucket.
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nsh> ls -l /dev
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/dev:
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crw-rw-rw- 0 null
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brw-rw-rw- 0 ram0
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nsh> dd if=/dev/ram0 of=/dev/null
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o df
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Show the state of each mounted volume.
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Example:
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nsh> mount
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/etc type romfs
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/tmp type vfat
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nsh> df
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Block Number
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Size Blocks Used Available Mounted on
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64 6 6 0 /etc
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512 985 2 983 /tmp
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nsh>
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o echo [<string|$name> [<string|$name>...]]
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Copy the sequence of strings and expanded environment variables to
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console out (or to a file if the output is re-directed).
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o exec <hex-address>
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Execute the user logic at address <hex-address>. NSH will pause
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until the execution unless the user logic is executed in background
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via 'exec <hex-address> &'
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o exit
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Exit NSH. Only useful if you have started some other tasks (perhaps
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using the 'exec' command') and you would like to have NSH out of the
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way.
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o free
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Show the current state of the memory allocator. For example,
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nsh> free
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free
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total used free largest
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Mem: 4194288 1591552 2602736 2601584
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Where:
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total - This is the total size of memory allocated for use
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by malloc in bytes.
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used - This is the total size of memory occupied by
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chunks handed out by malloc.
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free - This is the total size of memory occupied by
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free (not in use) chunks.
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largest - Size of the largest free (not in use) chunk
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o get [-b|-n] [-f <local-path>] -h <ip-address> <remote-path>
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Use TFTP to copy the file at <remote-address> from the host whose IP
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address is identified by <ip-address>. Other options:
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-f <local-path>
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The file will be saved relative to the current working directory
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unless <local-path> is provided.
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-b|-n
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Selects either binary ("octect") or test ("netascii") transfer
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mode. Default: text.
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o help [-v] [<cmd>]
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Presents summary information about NSH commands to console. Options:
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-v
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Show verbose output will full command usage
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<cmd>
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Show full command usage only for this command
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o hexdump <file or device>
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Dump data in hexadecimal format from a file or character device.
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o ifconfig [nic_name [<ip-address>|dhcp]] [dr|gw|gateway <dr-address>] [netmask <net-mask>] [dns <dns-address>] [hw <hw-mac>]
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Show the current configuration of the network, for example:
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nsh> ifconfig
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eth0 HWaddr 00:18:11:80:10:06
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IPaddr:10.0.0.2 DRaddr:10.0.0.1 Mask:255.255.255.0
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if uIP statistics are enabled (CONFIG_NET_STATISTICS), then
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this command will also show the detailed state of uIP.
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o ifdown <nic-name>
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Take down the interface identified by the name <nic-name>.
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Example:
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ifdown eth0
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o ifup <nic-name>
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Bring up down the interface identified by the name <nic-name>.
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Example:
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ifup eth0
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o kill -<signal> <pid>
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Send the <signal> to the task identified by <pid>.
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o losetup [-d <dev-path>] | [[-o <offset>] [-r] <ldev-path> <file-path>]
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Setup or teardown the loop device:
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1. Teardown the setup for the loop device at <dev-path>:
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losetup d <dev-path>
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2. Setup the loop device at <dev-path> to access the file at <file-path>
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as a block device:
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losetup [-o <offset>] [-r] <dev-path> <file-path>
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Example:
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nsh> dd if=/dev/zero of=/tmp/image bs=512 count=512
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nsh> ls -l /tmp
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/tmp:
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-rw-rw-rw- 262144 IMAGE
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nsh> losetup /dev/loop0 /tmp/image
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nsh> ls -l /dev
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/dev:
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brw-rw-rw- 0 loop0
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nsh> mkfatfs /dev/loop0
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nsh> mount -t vfat /dev/loop0 /mnt/example
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nsh> ls -l /mnt
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ls -l /mnt
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/mnt:
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drw-rw-rw- 0 example/
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nsh> echo "This is a test" >/mnt/example/atest.txt
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nsh> ls -l /mnt/example
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/mnt/example:
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-rw-rw-rw- 16 ATEST.TXT
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nsh> cat /mnt/example/atest.txt
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This is a test
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nsh>
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o ls [-lRs] <dir-path>
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Show the contents of the directory at <dir-path>. NOTE:
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<dir-path> must refer to a directory and no other filesystem
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object.
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Options:
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--------
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-R Show the constents of specified directory and all of its
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sub-directories.
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-s Show the size of the files along with the filenames in the
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listing
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-l Show size and mode information along with the filenames
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in the listing.
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o md5 [-f] <string or filepath>
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o mb <hex-address>[=<hex-value>][ <hex-byte-count>]
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o mh <hex-address>[=<hex-value>][ <hex-byte-count>]
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o mw <hex-address>[=<hex-value>][ <hex-byte-count>]
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Access memory using byte size access (mb), 16-bit accesses (mh),
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or 32-bit access (mw). In each case,
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<hex-address>. Specifies the address to be accessed. The current
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value at that address will always be read and displayed.
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<hex-address>=<hex-value>. Read the value, then write <hex-value>
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to the location.
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<hex-byte-count>. Perform the mb, mh, or mw operation on a total
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of <hex-byte-count> bytes, increment the <hex-address> appropriately
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after each access
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Example
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nsh> mh 0 16
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0 = 0x0c1e
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2 = 0x0100
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4 = 0x0c1e
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6 = 0x0110
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8 = 0x0c1e
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a = 0x0120
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c = 0x0c1e
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e = 0x0130
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10 = 0x0c1e
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12 = 0x0140
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14 = 0x0c1e
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nsh>
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o mkdir <path>
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Create the directory at <path>. All components of of <path>
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except the final directory name must exist on a mounted file
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system; the final directory must not.
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Recall that NuttX uses a pseudo filesystem for its root file system.
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The mkdir command can only be used to create directories in volumes
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set up with the mount command; it cannot be used to create directories
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in the pseudo filesystem.
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Example:
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^^^^^^^^
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nsh> mkdir /mnt/fs/tmp
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nsh> ls -l /mnt/fs
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/mnt/fs:
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drw-rw-rw- 0 TESTDIR/
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drw-rw-rw- 0 TMP/
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nsh>
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o mkfatfs <path>
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Format a fat file system on the block device specified by path.
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NSH provides this command to access the mkfatfs() NuttX API.
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|
This block device must reside in the NuttX pseudo filesystem and
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must have been created by some call to register_blockdriver() (see
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include/nuttx/fs/fs.h).
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o mkfifo <path>
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Creates a FIFO character device anywhere in the pseudo file system,
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creating whatever pseudo directories that may be needed to complete
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|
the full path. By convention, however, device drivers are place in
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the standard /dev directory. After it is created, the FIFO device
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may be used as any other device driver. NSH provides this command
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to access the mkfifo() NuttX API.
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Example:
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^^^^^^^^
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|
|
|
nsh> ls -l /dev
|
|
/dev:
|
|
crw-rw-rw- 0 console
|
|
crw-rw-rw- 0 null
|
|
brw-rw-rw- 0 ram0
|
|
nsh> mkfifo /dev/fifo
|
|
nsh> ls -l /dev
|
|
ls -l /dev
|
|
/dev:
|
|
crw-rw-rw- 0 console
|
|
crw-rw-rw- 0 fifo
|
|
crw-rw-rw- 0 null
|
|
brw-rw-rw- 0 ram0
|
|
nsh>
|
|
|
|
o mkrd [-m <minor>] [-s <sector-size>] <nsectors>
|
|
|
|
Create a ramdisk consisting of <nsectors>, each of size
|
|
<sector-size> (or 512 bytes if <sector-size> is not specified.
|
|
The ramdisk will be registered as /dev/ram<n> (if <n> is not
|
|
specified, mkrd will attempt to register the ramdisk as
|
|
/dev/ram0.
|
|
|
|
Example:
|
|
^^^^^^^^
|
|
|
|
nsh> ls /dev
|
|
/dev:
|
|
console
|
|
null
|
|
ttyS0
|
|
ttyS1
|
|
nsh> mkrd 1024
|
|
nsh> ls /dev
|
|
/dev:
|
|
console
|
|
null
|
|
ram0
|
|
ttyS0
|
|
ttyS1
|
|
nsh>
|
|
|
|
Once the ramdisk has been created, it may be formatted using
|
|
the mkfatfs command and mounted using the mount command.
|
|
|
|
Example:
|
|
^^^^^^^^
|
|
nsh> mkrd 1024
|
|
nsh> mkfatfs /dev/ram0
|
|
nsh> mount -t vfat /dev/ram0 /tmp
|
|
nsh> ls /tmp
|
|
/tmp:
|
|
nsh>
|
|
|
|
o mount [-t <fstype> <block-device> <dir-path>]
|
|
|
|
The mount command performs one of two different operations. If no
|
|
paramters are provided on the command line after the mount command,
|
|
then the 'mount' command will enumerate all of the current
|
|
mountpoints on the console.
|
|
|
|
If the mount parameters are provied on the command after the 'mount'
|
|
command, then the 'mount' command will mount a file system in the
|
|
NuttX pseudo-file system. 'mount' performs a three way association,
|
|
binding:
|
|
|
|
File system. The '-t <fstype>' option identifies the type of
|
|
file system that has been formatted on the <block-device>. As
|
|
of this writing, vfat is the only supported value for <fstype>
|
|
|
|
Block Device. The <block-device> argument is the full or relative
|
|
path to a block driver inode in the pseudo filesystem. By convention,
|
|
this is a name under the /dev sub-directory. This <block-device>
|
|
must have been previously formatted with the same file system
|
|
type as specified by <fstype>
|
|
|
|
Mount Point. The mount point is the location in the pseudo file
|
|
system where the mounted volume will appear. This mount point
|
|
can only reside in the NuttX pseudo filesystem. By convention, this
|
|
mount point is a subdirectory under /mnt. The mount command will
|
|
create whatever pseudo directories that may be needed to complete
|
|
the full path but the full path must not already exist.
|
|
|
|
After the volume has been mounted in the NuttX pseudo file
|
|
system, it may be access in the same way as other objects in the
|
|
file system.
|
|
|
|
Examples:
|
|
^^^^^^^^^
|
|
|
|
nsh> ls -l /dev
|
|
/dev:
|
|
crw-rw-rw- 0 console
|
|
crw-rw-rw- 0 null
|
|
brw-rw-rw- 0 ram0
|
|
nsh> ls /mnt
|
|
nsh: ls: no such directory: /mnt
|
|
nsh> mount -t vfat /dev/ram0 /mnt/fs
|
|
nsh> ls -l /mnt/fs/testdir
|
|
/mnt/fs/testdir:
|
|
-rw-rw-rw- 15 TESTFILE.TXT
|
|
nsh> echo "This is a test" >/mnt/fs/testdir/example.txt
|
|
nsh> ls -l /mnt/fs/testdir
|
|
/mnt/fs/testdir:
|
|
-rw-rw-rw- 15 TESTFILE.TXT
|
|
-rw-rw-rw- 16 EXAMPLE.TXT
|
|
nsh> cat /mnt/fs/testdir/example.txt
|
|
This is a test
|
|
nsh>
|
|
|
|
nsh> mount
|
|
/etc type romfs
|
|
/tmp type vfat
|
|
/mnt/fs type vfat
|
|
|
|
o mv <old-path> <new-path>
|
|
|
|
Rename the file object at <old-path> to <new-path>. Both paths must
|
|
reside in the same mounted filesystem.
|
|
|
|
o nfsmount <server-address> <mount-point> <remote-path>
|
|
|
|
Mount the remote NFS server directory <remote-path> at <mount-point> on the target machine.
|
|
<server-address> is the IP address of the remote server.
|
|
|
|
o ps
|
|
|
|
Show the currently active threads and tasks. For example,
|
|
|
|
nsh> ps
|
|
PID PRI SCHD TYPE NP STATE NAME
|
|
0 0 FIFO TASK READY Idle Task()
|
|
1 128 RR TASK RUNNING init()
|
|
2 128 FIFO TASK WAITSEM nsh_telnetmain()
|
|
3 100 RR PTHREAD WAITSEM <pthread>(21)
|
|
nsh>
|
|
|
|
o ping [-c <count>] [-i <interval>] <ip-address>
|
|
|
|
Test the network communication with a remote peer. Example,
|
|
|
|
nsh> 10.0.0.1
|
|
PING 10.0.0.1 56 bytes of data
|
|
56 bytes from 10.0.0.1: icmp_seq=1 time=0 ms
|
|
56 bytes from 10.0.0.1: icmp_seq=2 time=0 ms
|
|
56 bytes from 10.0.0.1: icmp_seq=3 time=0 ms
|
|
56 bytes from 10.0.0.1: icmp_seq=4 time=0 ms
|
|
56 bytes from 10.0.0.1: icmp_seq=5 time=0 ms
|
|
56 bytes from 10.0.0.1: icmp_seq=6 time=0 ms
|
|
56 bytes from 10.0.0.1: icmp_seq=7 time=0 ms
|
|
56 bytes from 10.0.0.1: icmp_seq=8 time=0 ms
|
|
56 bytes from 10.0.0.1: icmp_seq=9 time=0 ms
|
|
56 bytes from 10.0.0.1: icmp_seq=10 time=0 ms
|
|
10 packets transmitted, 10 received, 0% packet loss, time 10190 ms
|
|
nsh>
|
|
|
|
o put [-b|-n] [-f <remote-path>] -h <ip-address> <local-path>
|
|
|
|
Copy the file at <local-address> to the host whose IP address is
|
|
identified by <ip-address>. Other options:
|
|
|
|
-f <remote-path>
|
|
The file will be saved with the same name on the host unless
|
|
unless <local-path> is provided.
|
|
-b|-n
|
|
Selects either binary ("octect") or test ("netascii") transfer
|
|
mode. Default: text.
|
|
|
|
o pwd
|
|
|
|
Show the current working directory.
|
|
|
|
nsh> cd /dev
|
|
nsh> pwd
|
|
/dev
|
|
nsh>
|
|
|
|
Same as 'echo $PWD'
|
|
|
|
nsh> echo $PWD
|
|
/dev
|
|
nsh>
|
|
|
|
o rm <file-path>
|
|
|
|
Remove the specified <file-path> name from the mounted file system.
|
|
Recall that NuttX uses a pseudo filesystem for its root file system.
|
|
The rm command can only be used to remove (unlink) files in volumes
|
|
set up with the mount command; it cannot be used to remove names from
|
|
the pseudo filesystem.
|
|
|
|
Example:
|
|
^^^^^^^^
|
|
|
|
nsh> ls /mnt/fs/testdir
|
|
/mnt/fs/testdir:
|
|
TESTFILE.TXT
|
|
EXAMPLE.TXT
|
|
nsh> rm /mnt/fs/testdir/example.txt
|
|
nsh> ls /mnt/fs/testdir
|
|
/mnt/fs/testdir:
|
|
TESTFILE.TXT
|
|
nsh>
|
|
|
|
o rmdir <dir-path>
|
|
|
|
Remove the specified <dir-path> directory from the mounted file system.
|
|
Recall that NuttX uses a pseudo filesystem for its root file system. The
|
|
rmdir command can only be used to remove directories from volumes set up
|
|
with the mount command; it cannot be used to remove directories from the
|
|
pseudo filesystem.
|
|
|
|
Example:
|
|
^^^^^^^^
|
|
|
|
nsh> mkdir /mnt/fs/tmp
|
|
nsh> ls -l /mnt/fs
|
|
/mnt/fs:
|
|
drw-rw-rw- 0 TESTDIR/
|
|
drw-rw-rw- 0 TMP/
|
|
nsh> rmdir /mnt/fs/tmp
|
|
nsh> ls -l /mnt/fs
|
|
ls -l /mnt/fs
|
|
/mnt/fs:
|
|
drw-rw-rw- 0 TESTDIR/
|
|
nsh>
|
|
|
|
o set <name> <value>
|
|
|
|
Set the environment variable <name> to the sting <value>.
|
|
For example,
|
|
|
|
nsh> echo $foobar
|
|
|
|
nsh> set foobar foovalue
|
|
nsh> echo $foobar
|
|
foovalue
|
|
nsh>
|
|
|
|
o sh <script-path>
|
|
|
|
Execute the sequence of NSH commands in the file referred
|
|
to by <script-path>.
|
|
|
|
o sleep <sec>
|
|
|
|
Pause execution (sleep) of <sec> seconds.
|
|
|
|
o unset <name>
|
|
|
|
Remove the value associated with the environment variable
|
|
<name>. Example:
|
|
|
|
nsh> echo $foobar
|
|
foovalue
|
|
nsh> unset foobar
|
|
nsh> echo $foobar
|
|
|
|
nsh>
|
|
|
|
o urldecode [-f] <string or filepath>
|
|
|
|
o urlencode [-f] <string or filepath>
|
|
|
|
o usleep <usec>
|
|
|
|
Pause execution (sleep) of <usec> microseconds.
|
|
|
|
o wget [-o <local-path>] <url>
|
|
|
|
Use HTTP to copy the file at <url> to the current directory.
|
|
Options:
|
|
|
|
-o <local-path>
|
|
The file will be saved relative to the current working directory
|
|
and with the same name as on the HTTP server unless <local-path>
|
|
is provided.
|
|
|
|
o xd <hex-address> <byte-count>
|
|
|
|
Dump <byte-count> bytes of data from address <hex-address>
|
|
|
|
Example:
|
|
^^^^^^^^
|
|
|
|
nsh> xd 410e0 512
|
|
Hex dump:
|
|
0000: 00 00 00 00 9c 9d 03 00 00 00 00 01 11 01 10 06 ................
|
|
0010: 12 01 11 01 25 08 13 0b 03 08 1b 08 00 00 02 24 ....%..........$
|
|
...
|
|
01f0: 08 3a 0b 3b 0b 49 13 00 00 04 13 01 01 13 03 08 .:.;.I..........
|
|
nsh>
|
|
|
|
NSH Configuration Settings
|
|
^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
The availability of the above commands depends upon features that
|
|
may or may not be enabled in the NuttX configuration file. The
|
|
following table indicates the dependency of each command on NuttX
|
|
configuration settings. General configuration settings are discussed
|
|
in the NuttX Porting Guide. Configuration settings specific to NSH
|
|
as discussed at the bottom of this README file.
|
|
|
|
Command Dependencies on Configuration Settings
|
|
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
Command Depends on Configuration
|
|
---------- --------------------------
|
|
[ !CONFIG_NSH_DISABLESCRIPT
|
|
base64dec CONFIG_NETUTILS_CODECS && CONFIG_CODECS_BASE64
|
|
base64enc CONFIG_NETUTILS_CODECS && CONFIG_CODECS_BASE64
|
|
cat CONFIG_NFILE_DESCRIPTORS > 0
|
|
cd !CONFIG_DISABLE_ENVIRON && CONFIG_NFILE_DESCRIPTORS > 0
|
|
cp CONFIG_NFILE_DESCRIPTORS > 0
|
|
dd CONFIG_NFILE_DESCRIPTORS > 0
|
|
df !CONFIG_DISABLE_MOUNTPOINT && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_FS_READABLE (see note 3)
|
|
echo --
|
|
exec --
|
|
exit --
|
|
free --
|
|
get CONFIG_NET && CONFIG_NET_UDP && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NET_BUFSIZE >= 558 (see note 1)
|
|
help --
|
|
hexdump CONFIG_NFILE_DESCRIPTORS > 0
|
|
ifconfig CONFIG_NET
|
|
ifdown CONFIG_NET
|
|
ifup CONFIG_NET
|
|
kill !CONFIG_DISABLE_SIGNALS
|
|
losetup !CONFIG_DISABLE_MOUNTPOINT && CONFIG_NFILE_DESCRIPTORS > 0
|
|
ls CONFIG_NFILE_DESCRIPTORS > 0
|
|
md5 CONFIG_NETUTILS_CODECS && CONFIG_CODECS_HASH_MD5
|
|
mb,mh,mw ---
|
|
mkdir !CONFIG_DISABLE_MOUNTPOINT && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_FS_WRITABLE (see note 4)
|
|
mkfatfs !CONFIG_DISABLE_MOUNTPOINT && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_FS_FAT
|
|
mkfifo CONFIG_NFILE_DESCRIPTORS > 0
|
|
mkrd !CONFIG_DISABLE_MOUNTPOINT && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_FS_WRITABLE (see note 4)
|
|
mount !CONFIG_DISABLE_MOUNTPOINT && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_FS_READABLE (see note 3)
|
|
mv !CONFIG_DISABLE_MOUNTPOINT && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_FS_WRITABLE (see note 4)
|
|
nfsmount !CONFIG_DISABLE_MOUNTPOINT && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NET && CONFIG_NFS
|
|
ping CONFIG_NET && CONFIG_NET_ICMP && CONFIG_NET_ICMP_PING && !CONFIG_DISABLE_CLOCK && !CONFIG_DISABLE_SIGNALS
|
|
ps --
|
|
put CONFIG_NET && CONFIG_NET_UDP && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NET_BUFSIZE >= 558 (see note 1,2)
|
|
pwd !CONFIG_DISABLE_ENVIRON && CONFIG_NFILE_DESCRIPTORS > 0
|
|
rm !CONFIG_DISABLE_MOUNTPOINT && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_FS_WRITABLE (see note 4)
|
|
rmdir !CONFIG_DISABLE_MOUNTPOINT && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_FS_WRITABLE (see note 4)
|
|
set !CONFIG_DISABLE_ENVIRON
|
|
sh CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0 && !CONFIG_NSH_DISABLESCRIPT
|
|
sleep !CONFIG_DISABLE_SIGNALS
|
|
test !CONFIG_NSH_DISABLESCRIPT
|
|
umount !CONFIG_DISABLE_MOUNTPOINT && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_FS_READABLE
|
|
unset !CONFIG_DISABLE_ENVIRON
|
|
urldecode CONFIG_NETUTILS_CODECS && CONFIG_CODECS_URLCODE
|
|
urlencode CONFIG_NETUTILS_CODECS && CONFIG_CODECS_URLCODE
|
|
usleep !CONFIG_DISABLE_SIGNALS
|
|
get CONFIG_NET && CONFIG_NET_TCP && CONFIG_NFILE_DESCRIPTORS > 0
|
|
xd ---
|
|
|
|
* NOTES:
|
|
1. Because of hardware padding, the actual buffersize required for put and get
|
|
operations size may be larger.
|
|
2. Special TFTP server start-up optionss will probably be required to permit
|
|
creation of file for the correct operation of the put command.
|
|
3. CONFIG_FS_READABLE is not a user configuration but is set automatically
|
|
if any readable filesystem is selected. At present, this is either CONFIG_FS_FAT
|
|
and CONFIG_FS_ROMFS.
|
|
4. CONFIG_FS_WRITABLE is not a user configuration but is set automatically
|
|
if any writable filesystem is selected. At present, this is only CONFIG_FS_FAT.
|
|
|
|
In addition, each NSH command can be individually disabled via one of the following
|
|
settings. All of these settings make the configuration of NSH potentially complex but
|
|
also allow it to squeeze into very small memory footprints.
|
|
|
|
CONFIG_NSH_DISABLE_BASE64DEC, CONFIG_NSH_DISABLE_BASE64ENC, CONFIG_NSH_DISABLE_CAT,
|
|
CONFIG_NSH_DISABLE_CD, CONFIG_NSH_DISABLE_CP, CONFIG_NSH_DISABLE_DD,
|
|
CONFIG_NSH_DISABLE_DF, CONFIG_NSH_DISABLE_ECHO, CONFIG_NSH_DISABLE_EXEC,
|
|
CONFIG_NSH_DISABLE_EXIT, CONFIG_NSH_DISABLE_FREE, CONFIG_NSH_DISABLE_GET,
|
|
CONFIG_NSH_DISABLE_HELP, CONFIG_NSH_DISABLE_HEXDUMP, CONFIG_NSH_DISABLE_IFCONFIG,
|
|
CONFIG_NSH_DISABLE_IFUPDOWN, CONFIG_NSH_DISABLE_KILL, CONFIG_NSH_DISABLE_LOSETUP,
|
|
CONFIG_NSH_DISABLE_LS, CONFIG_NSH_DISABLE_MD5 CONFIG_NSH_DISABLE_MB,
|
|
CONFIG_NSH_DISABLE_MKDIR, CONFIG_NSH_DISABLE_MKFATFS, CONFIG_NSH_DISABLE_MKFIFO,
|
|
CONFIG_NSH_DISABLE_MKRD, CONFIG_NSH_DISABLE_MH, CONFIG_NSH_DISABLE_MOUNT,
|
|
CONFIG_NSH_DISABLE_MW, CONFIG_NSH_DISABLE_MV, CONFIG_NSH_DISABLE_NFSMOUNT,
|
|
CONFIG_NSH_DISABLE_PS, CONFIG_NSH_DISABLE_PING, CONFIG_NSH_DISABLE_PUT,
|
|
CONFIG_NSH_DISABLE_PWD, CONFIG_NSH_DISABLE_RM, CONFIG_NSH_DISABLE_RMDIR,
|
|
CONFIG_NSH_DISABLE_SET, CONFIG_NSH_DISABLE_SH, CONFIG_NSH_DISABLE_SLEEP,
|
|
CONFIG_NSH_DISABLE_TEST, CONFIG_NSH_DISABLE_UMOUNT, CONFIG_NSH_DISABLE_UNSET,
|
|
CONFIG_NSH_DISABLE_URLDECODE, CONFIG_NSH_DISABLE_URLENCODE, CONFIG_NSH_DISABLE_USLEEP,
|
|
CONFIG_NSH_DISABLE_WGET, CONFIG_NSH_DISABLE_XD
|
|
|
|
Verbose help output can be suppressed by defining CONFIG_NSH_HELP_TERSE. In that
|
|
case, the help command is still available but will be slightly smaller.
|
|
|
|
NSH-Specific Configuration Settings
|
|
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
The behavior of NSH can be modified with the following settings in
|
|
the configs/<board-name>/defconfig file:
|
|
|
|
* CONFIG_NSH_BUILTIN_APPS
|
|
Support external registered, "builtin" applications that can be
|
|
executed from the NSH command line (see apps/README.txt for
|
|
more information).
|
|
|
|
* CONFIG_NSH_FILEIOSIZE
|
|
Size of a static I/O buffer used for file access (ignored if
|
|
there is no filesystem). Default is 1024.
|
|
|
|
* CONFIG_NSH_STRERROR
|
|
strerror(errno) makes more readable output but strerror() is
|
|
very large and will not be used unless this setting is 'y'.
|
|
This setting depends upon the strerror() having been enabled
|
|
with CONFIG_LIBC_STRERROR.
|
|
|
|
* CONFIG_NSH_LINELEN
|
|
The maximum length of one command line and of one output line.
|
|
Default: 80
|
|
|
|
* CONFIG_NSH_NESTDEPTH
|
|
The maximum number of nested if-then[-else]-fi sequences that
|
|
are permissable. Default: 3
|
|
|
|
* CONFIG_NSH_DISABLESCRIPT
|
|
This can be set to 'y' to suppress support for scripting. This
|
|
setting disables the 'sh', 'test', and '[' commands and the
|
|
if-then[-else]-fi construct. This would only be set on systems
|
|
where a minimal footprint is a necessity and scripting is not.
|
|
|
|
* CONFIG_NSH_DISABLEBG
|
|
This can be set to 'y' to suppress support for background
|
|
commands. This setting disables the 'nice' command prefix and
|
|
the '&' command suffix. This would only be set on systems
|
|
where a minimal footprint is a necessity and background command
|
|
execution is not.
|
|
|
|
* CONFIG_NSH_MMCSDMINOR
|
|
If the architecture supports an MMC/SD slot and if the NSH
|
|
architecture specific logic is present, this option will provide
|
|
the MMC/SD minor number, i.e., the MMC/SD block driver will
|
|
be registered as /dev/mmcsdN where N is the minor number.
|
|
Default is zero.
|
|
|
|
* CONFIG_NSH_ROMFSETC
|
|
Mount a ROMFS filesystem at /etc and provide a startup script
|
|
at /etc/init.d/rcS. The default startup script will mount
|
|
a FAT FS RAMDISK at /tmp but the logic is easily extensible.
|
|
|
|
* CONFIG_NSH_CONSOLE
|
|
If CONFIG_NSH_CONSOLE is set to 'y', then a serial
|
|
console front-end is selected.
|
|
|
|
Normally, the serial console device is a UART and RS-232
|
|
interface. However, if CONFIG_USBDEV is defined, then a USB
|
|
serial device may, instead, be used if the one of
|
|
the following are defined:
|
|
|
|
CONFIG_PL2303 and CONFIG_PL2303_CONSOLE - Sets up the
|
|
Prolifics PL2303 emulation as a console device
|
|
at /dev/console.
|
|
|
|
CONFIG_CDCACM and CONFIG_CDCACM_CONSOLE - Sets up the
|
|
CDC/ACM serial device as a console device at
|
|
dev/console.
|
|
|
|
CONFIG_NSH_USBCONSOLE
|
|
If defined, then the an arbitrary USB device may be used
|
|
to as the NSH console. In this case, CONFIG_NSH_USBCONDEV
|
|
must be defined to indicate which USB device to use as
|
|
the console.
|
|
|
|
CONFIG_NSH_USBCONDEV
|
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If CONFIG_NSH_USBCONSOLE is set to 'y', then CONFIG_NSH_USBCONDEV
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must also be set to select the USB device used to support
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the NSH console. This should be set to the quoted name of a
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readable/write-able USB driver such as:
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CONFIG_NSH_USBCONDEV="/dev/ttyACM0".
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If there are more than one USB devices, then a USB device
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minor number may also need to be provided:
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CONFIG_NSH_UBSDEV_MINOR
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The minor device number of the USB device. Default: 0
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If USB tracing is enabled (CONFIG_USBDEV_TRACE), then NSH will
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initialize USB tracing as requested by the following. Default:
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Only USB errors are traced.
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CONFIG_NSH_USBDEV_TRACEINIT
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Show initialization events
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CONFIG_NSH_USBDEV_TRACECLASS
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Show class driver events
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CONFIG_NSH_USBDEV_TRACETRANSFERS
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Show data transfer events
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CONFIG_NSH_USBDEV_TRACECONTROLLER
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Show controller events
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CONFIG_NSH_USBDEV_TRACEINTERRUPTS
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Show interrupt-related events.
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* CONFIG_NSH_CONDEV
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If CONFIG_NSH_CONSOLE is set to 'y', then CONFIG_NSH_CONDEV
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may also be set to select the serial device used to support
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the NSH console. This should be set to the quoted name of a
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readable/write-able character driver such as:
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CONFIG_NSH_CONDEV="/dev/ttyS1". This is useful, for example,
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to separate the NSH command line from the system console when
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the system console is used to provide debug output. Default:
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stdin and stdout (probably "/dev/console")
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NOTE: When any other device other than /dev/console is used
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for a user interface, (1) linefeeds (\n) will not be expanded to
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carriage return / linefeeds (\r\n). You will need to set
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your terminal program to account for this. And (2) input is
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not automatically echoed so you will have to turn local echo on.
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* CONFIG_NSH_TELNET
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If CONFIG_NSH_TELNET is set to 'y', then a TELENET
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server front-end is selected. When this option is provided,
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you may log into NuttX remotely using telnet in order to
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access NSH.
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* CONFIG_NSH_ARCHINIT
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Set if your board provides architecture specific initialization
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via the board-specific function nsh_archinitialize(). This
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function will be called early in NSH initialization to allow
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board logic to do such things as configure MMC/SD slots.
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If Telnet is selected for the NSH console, then we must configure
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the resources used by the Telnet daemon and by the Telnet clients.
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* CONFIG_NSH_TELNETD_PORT - The telnet daemon will listen on this
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TCP port number for connections. Default: 23
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* CONFIG_NSH_TELNETD_DAEMONPRIO - Priority of the Telnet daemon.
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Default: SCHED_PRIORITY_DEFAULT
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* CONFIG_NSH_TELNETD_DAEMONSTACKSIZE - Stack size allocated for the
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Telnet daemon. Default: 2048
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* CONFIG_NSH_TELNETD_CLIENTPRIO- Priority of the Telnet client.
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Default: SCHED_PRIORITY_DEFAULT
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* CONFIG_NSH_TELNETD_CLIENTSTACKSIZE - Stack size allocated for the
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Telnet client. Default: 2048
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One or both of CONFIG_NSH_CONSOLE and CONFIG_NSH_TELNET
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must be defined. If CONFIG_NSH_TELNET is selected, then there some
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other configuration settings that apply:
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* CONFIG_NET=y
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Of course, networking must be enabled
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* CONFIG_NSOCKET_DESCRIPTORS
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And, of course, you must allocate some socket descriptors.
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* CONFIG_NET_TCP=y
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TCP/IP support is required for telnet (as well as various other TCP-related
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configuration settings).
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* CONFIG_NSH_IOBUFFER_SIZE
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Determines the size of the I/O buffer to use for sending/
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receiving TELNET commands/reponses
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* CONFIG_NSH_DHCPC
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Obtain the IP address via DHCP.
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* CONFIG_NSH_IPADDR
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If CONFIG_NSH_DHCPC is NOT set, then the static IP
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address must be provided.
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* CONFIG_NSH_DRIPADDR
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Default router IP address
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* CONFIG_NSH_NETMASK
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Network mask
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* CONFIG_NSH_NOMAC
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Set if your ethernet hardware has no built-in MAC address.
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If set, a bogus MAC will be assigned.
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* CONFIG_NSH_MAX_ROUNDTRIP
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This is the maximum round trip for a response to a ICMP ECHO request.
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It is in units of deciseconds. The default is 20 (2 seconds).
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If you use DHCPC, then some special configuration network options are
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required. These include:
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* CONFIG_NET=y
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Of course, networking must be enabled
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* CONFIG_NSOCKET_DESCRIPTORS
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And, of course, you must allocate some socket descriptors.
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* CONFIG_NET_UDP=y
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UDP support is required for DHCP (as well as various other UDP-related
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configuration settings)
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* CONFIG_NET_BROADCAST=y
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UDP broadcast support is needed.
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* CONFIG_NET_BUFSIZE=650 (or larger)
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Per RFC2131 (p. 9), the DHCP client must be prepared to receive DHCP
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messages of up to 576 bytes (excluding Ethernet, IP, or UDP headers and FCS).
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If CONFIG_NSH_ROMFSETC is selected, then the following additional
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configuration setting apply:
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* CONFIG_NSH_ROMFSMOUNTPT
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The default mountpoint for the ROMFS volume is /etc, but that
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can be changed with this setting. This must be a absolute path
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beginning with '/'.
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* CONFIG_NSH_INITSCRIPT
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This is the relative path to the startup script within the mountpoint.
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The default is init.d/rcS. This is a relative path and must not
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start with '/'.
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* CONFIG_NSH_ROMFSDEVNO
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This is the minor number of the ROMFS block device. The default is
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'0' corresponding to /dev/ram0.
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* CONFIG_NSH_ROMFSSECTSIZE
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This is the sector size to use with the ROMFS volume. Since the
|
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default volume is very small, this defaults to 64 but should be
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increased if the ROMFS volume were to be become large. Any value
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selected must be a power of 2.
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When the default rcS file used when CONFIG_NSH_ROMFSETC is
|
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selected, it will mount a FAT FS under /tmp. The following selections
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describe that FAT FS.
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* CONFIG_NSH_FATDEVNO
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This is the minor number of the FAT FS block device. The default is
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'1' corresponding to /dev/ram1.
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* CONFIG_NSH_FATSECTSIZE
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This is the sector size use with the FAT FS. Default is 512.
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* CONFIG_NSH_FATNSECTORS
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This is the number of sectors to use with the FAT FS. Defalt is
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1024. The amount of memory used by the FAT FS will be
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CONFIG_NSH_FATSECTSIZE * CONFIG_NSH_FATNSECTORS
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bytes.
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* CONFIG_NSH_FATMOUNTPT
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This is the location where the FAT FS will be mounted. Default
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is /tmp.
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Common Problems
|
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^^^^^^^^^^^^^^^
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Problem:
|
|
Using NSH over serial, the "nsh>" prompt repeats over and over again
|
|
with no serial input.
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Usual Cause:
|
|
NSH over serial needs to use the interrupt driven serial driver
|
|
(drivers/serial/serial.c) not the polled serial driver (drivers/serial/lowconsole.c).
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|
Make sure that the polled console is disabled in the OS configuration
|
|
file, .config. That file should have CONFIG_DEV_LOWCONSOLE=n for
|
|
NSH over serial.
|
|
|
|
Problem:
|
|
The function 'readline' is undefined.
|
|
Usual Cause:
|
|
The following is missing from your appconfig file:
|
|
|
|
CONFIGURED_APPS += system/readline
|
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