3657 lines
114 KiB
HTML
3657 lines
114 KiB
HTML
<html>
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<head>
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<title>NuttShell</title>
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</head>
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<body background="backgd.gif">
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<hr><hr>
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<table width ="100%">
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<tr align="center" bgcolor="#e4e4e4">
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<td>
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<h1><big><font color="#3c34ec"><i>NuttShell (NSH)</i></font></big></h1>
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<p>Last Updated: August 28, 2012</p>
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</td>
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</table>
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<hr><hr>
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<table width ="100%">
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<tr bgcolor="#e4e4e4">
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<td>
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<h1>Table of Contents</h1>
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</table>
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<center><table width ="80%">
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<table>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td>
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<a href="#overview">1.0 Overview</a>
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</td>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<a href="#frontend">1.1 Console/NSH Front End</a>
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</td>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<a href="#cmdoverview">1.2 Command Overview</a>
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</td>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<a href="#conditional">1.3 Conditional Command Execution</a>
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</td>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<a href="#builtinvars">1.4 Built-In Variables</a>
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</td>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<a href="#currentwd">1.5 Current Working Directory</a>
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</td>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<a href="#environvars">1.6 Environment Variables</a>
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</td>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<a href="#startupscript">1.7 NSH Start-Up Script</a>
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</td>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td>
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<a href="#commands">2.0 Commands</a>.
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<td><br></td>
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<td>
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<a href="#cmdtest">2.1 Evaluate Expression (test)</a>
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</td>
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<td><br></td>
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<a href="#cmdcat">2.2 Concatenate Files (cat)</a>
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</td>
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<td><br></td>
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<a href="#cmdcd">2.3 Change Current Working Directory (cd)</a>
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</td>
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<td><br></td>
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<a href="#cmdcp">2.4 Copy Files (cp)</a>
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</td>
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<td><br></td>
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<td>
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<a href="#cmddate">2.5 Show or set the date and time (date)</a>
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</td>
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</tr>
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<td><br></td>
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<td>
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<a href="#cmddd">2.6 Copy and Convert Files (dd)</a>
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</td>
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</tr>
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<td><br></td>
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<td>
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<a href="#cmddf">2.7 Show volume status (df)</a>
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</td>
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<td><br></td>
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<td>
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<a href="#cmdecho">2.8 Echo Strings and Variables (echo)</a>
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</td>
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</tr>
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<td><br></td>
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<td>
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<a href="#cmdexec">2.9 Execute User Code (exec)</a>
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<td><br></td>
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<td>
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<a href="#cmdexit">2.10 Exit NSH (exit)</a>
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</td>
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<td><br></td>
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<td>
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<a href="#cmdfree">2.11 Show Memory Manager Status (free)</a>
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</td>
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</tr>
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<td><br></td>
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<td>
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<a href="#cmdget">2.12 Get File Via TFTP (get)</a>
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</td>
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<td><br></td>
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<a href="#cmdhelp">2.13 Show Usage Command Usage (help)</a>
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</td>
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<td><br></td>
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<td>
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<a href="#cmdifconfig">2.14 Show Network Configuration (ifconfig)</a>
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</td>
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<td><br></td>
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<td>
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<a href="#cmdkill">2.15 Send a signal to a task (kill)</a>
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</td>
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<td><br></td>
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<td>
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<a href="#cmdlosetup">2.16 Setup/teardown the Loop Device (losetup)</a>
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<td><br></td>
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<td>
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<a href="#cmdls">2.17 List Directory Contents (ls)</a>
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</td>
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</tr>
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<td><br></td>
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<td>
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<a href="#cmdmbhw">2.18 Access Memory (mb, mh, and mw)</a>
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</td>
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<td><br></td>
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<td>
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<a href="#cmdps">2.19 Show Current Tasks and Threads (ps)</a>
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<td><br></td>
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<td>
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<a href="#cmdmkdir">2.20 Create a Directory (mkdir)</a>
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<td><br></td>
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<td>
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<a href="#cmdmkfatfs">2.21 Create a FAT Filesystem (mkfatfs)</a>
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</td>
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<td><br></td>
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<a href="#cmdmkfifo">2.22 Create a FIFO (mkfifo)</a>
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<a href="#cmdmkrd">2.23 Create a RAMDISK (mkrd)</a>
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<td><br></td>
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<a href="#cmdmount">2.24 Mount a File System (mount)</a>
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<td><br></td>
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<td>
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<a href="#cmdmv">2.25 Rename a File (mv)</a>
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<td><br></td>
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<a href="#cmdnfsmount">2.26 Mount an NFS file system (nfsmount)</a>
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<td><br></td>
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<td>
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<a href="#cmdping">2.27 Check Network Peer (ping)</a>
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<td><br></td>
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<a href="#cmdput">2.28 Send File Via TFTP (put)</a>
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<td><br></td>
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<a href="#cmdpwd">2.29 Show Current Working Directory (pwd)</a>
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<td><br></td>
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<a href="#cmdrm">2.30 Remove a File (rm)</a>
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<td><br></td>
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<a href="#cmdrmdir">2.31 Remove a Directory (rmdir)</a>
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<a href="#cmdset">2.32 Set an Environment Variable (set)</a>
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<td><br></td>
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<td>
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<a href="#cmdsh">2.33 Execute an NSH Script (sh)</a>
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<td><br></td>
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<a href="#cmdsleep">2.34 Wait for Seconds (sleep)</a>
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<td><br></td>
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<a href="#cmdunmount">2.35 Unmount a File System (umount)</a>
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</td>
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<td><br></td>
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<a href="#cmdunset">2.36 Unset an Environment Variable (unset)</a>
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<td><br></td>
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<a href="#cmdusleep">2.37 Wait for Microseconds (usleep)</a>
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<td><br></td>
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<td>
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<a href="#cmdwget">2.38 Get File Via HTTP (wget)</a>
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</td>
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</tr>
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<td><br></td>
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<td>
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<a href="#cmdxd">2.39 Hexadecimal Dump (xd)</a>
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</td>
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</tr>
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<tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td>
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<a href="#configuration">3.0 Configuration Settings</a>
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</td>
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<td><br></td>
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<td>
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<a href="#cmddependencies">3.1 Command Dependencies on Configuration Settings</a>
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</td>
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<td><br></td>
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<td>
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<a href="#nshconfiguration">3.2 NSH-Specific Configuration Settings</a>
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</td>
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</tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td>
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<a href="#customizingnsh">4.0 Customimizing the NuttShell</a>
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</td>
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</tr>
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<td><br></td>
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<td>
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<a href="#custonshlib">4.1 The NSH Library and NSH Initialization</a>
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</td>
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</tr>
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<tr>
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<td><br></td>
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<td>
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<a href="#custoncmds">4.2 NSH Commands</a>
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</td>
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</tr>
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<td><br></td>
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<td>
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<a href="#custapps">4.3 NSH "Built-In" Applications</a>
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</td>
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</tr>
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<td><br></td>
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<td>
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<a href="#custinit">4.4 Customizing NSH Initialization</a>
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</td>
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</tr>
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<tr>
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<td valign="top" width="22"><img height="20" width="20" src="favicon.ico"></td>
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<td>
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<a href="#index">Index</a>
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</td>
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</table>
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</td>
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</tr>
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</table></center>
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<table width ="100%">
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<tr bgcolor="#e4e4e4">
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<td>
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<a name="overview"><h1>1.0 Overview</h1></a>
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</td>
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</tr>
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</table>
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<p>
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The <code>apps/nshlib</code> sub-directory contains the NuttShell (NSH)
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library.
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This library can easily to linked to produce a NSH application (See as an example <code>apps/nshlib</code>).
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NSH is a simple shell application for NuttX.
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</p>
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<table width ="100%">
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<tr bgcolor="#e4e4e4">
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<td>
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<a name="frontend"><h2>1.1 Console/NSH Front End</h2></a>
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</td>
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</tr>
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</table>
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<p>
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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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<ul><pre>
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NuttShell (NSH)
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nsh>
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</pre></ul>
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<code>nsh></code> is the NSH prompt and indicates that you may enter a command
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from the console.
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</p>
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<table width ="100%">
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<tr bgcolor="#e4e4e4">
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<td>
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<a name="cmdoverview"><h2>1.2 Command Overview</h2></a>
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</td>
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</tr>
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</table>
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<p>
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<b>Simple, Re-directed, and Background Commands</b>.
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The NuttShell (NSH) is a simple shell application.
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NSH supports the following commands forms:
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</p>
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<ul><table>
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<tr>
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<td>Simple command:</td>
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<td><code><cmd></code></td>
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</tr>
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<tr>
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<td>Command with re-directed output:</td>
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<td><code>
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<cmd> > <file><br>
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<cmd> >> <file>
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</code></td>
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</tr>
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<tr>
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<td>Background command:</td>
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<td><code><cmd> &</code></td>
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</tr>
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<tr>
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<td>Re-directed background command:</td>
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<td><code>
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<cmd> > <file> &<br>
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<cmd> >> <file> &
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</code></td>
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</tr>
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</table></ul>
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<p>Where:</p>
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<ul><table>
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<tr>
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<td><code><cmd></code></td>
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<td>
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is any one of the simple commands listed later.
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</td>
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</tr>
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<tr>
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<td><code><file></code></td>
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<td>
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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 document.
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</td>
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</tr>
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</table></ul>
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<p>
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<b><big><code>nice</code></big>'d Background Commands</b>
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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 <code>nice</code>:
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</p>
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<ul><code>
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[nice [-d <niceness>>]] <cmd> [> <file>|>> <file>] [&]
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</code></ul>
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<p>
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Where <code><niceness></code> is any value between -20 and 19 where lower
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(more negative values) correspond to higher priorities.
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The default niceness is 10.
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</p>
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<table width ="100%">
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<tr bgcolor="#e4e4e4">
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<td>
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<a name="conditional"><h2>1.3 Conditional Command Execution</h2></a>
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</td>
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</tr>
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</table>
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<p>
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An <code>if-then[-else]-fi</code> 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 <a href="#cmdsh"><code>sh</code></a> commnd). The syntax is as follows:
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</p>
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<ul><pre>
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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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</pre></ul>
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<table width ="100%">
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<tr bgcolor="#e4e4e4">
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<td>
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<a name="builtinvars"><h2>1.4 Built-In Variables</h2></a>
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</td>
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</tr>
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</table>
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<ul><table>
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<tr>
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<td valign="top"><b><code>$?</code></b></td>
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<td>
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The result of the last simple command execution.
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On backgrounded commands, this variable holds only the result of spawning the background command.
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</td>
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</tr>
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</table></ul>
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<table width ="100%">
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<tr bgcolor="#e4e4e4">
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<td>
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<a name="currentwd"><h2>1.5 Current Working Directory</h2></a>
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</td>
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</tr>
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</table>
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<p>
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<b><code>cd</code> and <code>pwd</code></b>.
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All path arguments to commands may be either an absolute path or a
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path relative to the current working directory. The current working
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directory is set using the <a href="#cmdcd"><code>cd</code></a> command and can be queried either
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by using the <a href="#cmdpwd"><code>pwd</code></a> command or by
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using the <a href="#cmdecho"><code>echo</code></a> <a href="#environvars"><code>$PWD</code></a>
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command.
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</p>
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<table width ="100%">
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<tr bgcolor="#e4e4e4">
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<td>
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<a name="environvars"><h2>1.6 Environment Variables</h2></a>
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</td>
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</tr>
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</table>
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<p>
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<b>Environment Variables:</b>
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|
</p>
|
|
<ul><table>
|
|
<tr>
|
|
<td><b><code>PWD</code></b></td><td>The current working directory</td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>OLDPWD</code></b></td><td>The previous working directory</td>
|
|
</tr>
|
|
</table></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="startupscript"><h2>1.7 NSH Start-Up Script</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p>
|
|
<b>NSH Start-Up Script</b>.
|
|
NSH supports options to provide a start up script for NSH. In general
|
|
this capability is enabled with <code>CONFIG_NSH_ROMFSETC</code>, but has
|
|
several other related configuration options as described with the
|
|
<a href="#nshconfiguration">NSH-specific configuration settings</a>.
|
|
This capability also depends on:
|
|
<ul>
|
|
<li><code>CONFIG_DISABLE_MOUNTPOINT</code> not set
|
|
<li><code>CONFIG_NFILE_DESCRIPTORS</code> > 4
|
|
<li><code>CONFIG_FS_ROMFS</code> enabled
|
|
</ul>
|
|
</p>
|
|
|
|
<p>
|
|
<b>Default Start-Up Behavior</b>.
|
|
The implementation that is provided is intended to provide great flexibility
|
|
for the use of Start-Up files. This paragraph will discuss the general
|
|
behavior when all of the configuration options are set to the default
|
|
values.
|
|
</p>
|
|
<p>
|
|
In this default case, enabling <code>CONFIG_NSH_ROMFSETC</code> will cause
|
|
NSH to behave as follows at NSH startup time:
|
|
<ul>
|
|
<li>
|
|
NSH will create a read-only RAM disk (a ROM disk), containing a tiny
|
|
ROMFS filesystem containing the following:
|
|
<ul><pre>
|
|
`--init.d/
|
|
`-- rcS
|
|
</pre></ul>
|
|
Where rcS is the NSH start-up script.
|
|
</li>
|
|
<li>
|
|
NSH will then mount the ROMFS filesystem at <code>/etc</code>, resulting in:
|
|
<ul><pre>
|
|
|--dev/
|
|
| `-- ram0
|
|
`--etc/
|
|
`--init.d/
|
|
`-- rcS
|
|
</pre></ul>
|
|
</li>
|
|
<li>
|
|
By default, the contents of rcS script are:
|
|
<ul><pre>
|
|
# Create a RAMDISK and mount it at XXXRDMOUNTPOUNTXXX
|
|
|
|
mkrd -m 1 -s 512 1024
|
|
mkfatfs /dev/ram1
|
|
mount -t vfat /dev/ram1 /tmp
|
|
</pre></ul>
|
|
</li>
|
|
<li>
|
|
NSH will execute the script at <code>/etc/init.d/rcS</code> at start-up (before the
|
|
first NSH prompt. After execution of the script, the root FS will look
|
|
like:
|
|
<ul><pre>
|
|
|--dev/
|
|
| |-- ram0
|
|
| `-- ram1
|
|
|--etc/
|
|
| `--init.d/
|
|
| `-- rcS
|
|
`--tmp/
|
|
</pre></ul>
|
|
</li>
|
|
</ul>
|
|
</p>
|
|
<p>
|
|
<b>Modifying the ROMFS Image</b>.
|
|
The contents of the <code>/etc</code> directory are retained in the file <code>apps/nshlib/nsh_romfsimg.h</code> OR, if <code>CONFIG_NSH_ARCHROMFS</code> is defined, <code>include/arch/board/rcs.template</code>).
|
|
In order to modify the start-up behavior, there are three things to study:
|
|
<ol>
|
|
<li>
|
|
<b>Configuration Options.</b>
|
|
The additional <code>CONFIG_NSH_ROMFSETC</code> configuration options
|
|
discussed with the other <a href="#nshconfiguration">NSH-specific configuration settings</a>.
|
|
</li>
|
|
<li>
|
|
<p>
|
|
<b><code>tools/mkromfsimg.sh</code> Script</b>.
|
|
The script <code>tools/mkromfsimg.sh</code> creates <code>nsh_romfsimg.h</code>.
|
|
It is not automatically executed. If you want to change the
|
|
configuration settings associated with creating and mounting
|
|
the <code>/tmp</code> directory, then it will be necessary to re-generate
|
|
this header file using the <code>tools/mkromfsimg.sh</code> script.
|
|
</p>
|
|
<p>
|
|
The behavior of this script depends upon three things:
|
|
<ul>
|
|
<li>The configuration settings then installed configuration.
|
|
<li>The <code>genromfs</code> tool (available from <a href="http://romfs.sourceforge.net">http://romfs.sourceforge.net</a>).
|
|
<li>The file <code>apps/nshlib/rcS.template</code>
|
|
(OR, if <code>CONFIG_NSH_ARCHROMFS</code> is defined <code>include/arch/board/rcs.template</code>.
|
|
</ul>
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<b><code>rcS.template</code></b>.
|
|
The file <code>apps/nshlib/rcS.template</code> contains the general form
|
|
of the <code>rcS</code> file; configured values are plugged into this
|
|
template file to produce the final <code>rcS</code> file.
|
|
</li>
|
|
</ol>
|
|
</p>
|
|
<p>
|
|
<b>NOTE</b>:
|
|
<code>apps/nshlib/rcS.template</code> generates the standard, default <code>nsh_romfsimg.h</code> file.
|
|
If <code>CONFIG_NSH_ARCHROMFS</code> is defined in the NuttX configuration file, then a custom, board-specific <code>nsh_romfsimg.h</code> file residing in <code>configs/<board>/include</code> will be used.
|
|
NOTE when the OS is configured, <code>include/arch/board</code> will be linked to <code>configs/<board>/include</code>.
|
|
</p>
|
|
<p>
|
|
All of the startup-behavior is contained in <code>rcS.template</code>. The
|
|
role of <code>mkromfsimg.sh</code> is to (1) apply the specific configuration
|
|
settings to <code>rcS.template</code> to create the final <code>rcS</code>, and (2) to
|
|
generate the header file <code>nsh_romfsimg.h</code> containg the ROMFS
|
|
file system image.
|
|
</p>
|
|
|
|
<p>
|
|
<b>Further Information</b>.
|
|
See the section on <a href="#customizingnsh">Customimizing the NuttShell</a> for additional, more detailed information about the NSH start-up script and how to modify it.
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="commands"><h1>2.0 Commands</h1></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdtest"><h2>2.1 Evaluate Expression (test)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
[ <expression> ]
|
|
test <expression>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
These are two alternative forms of the same command. They support
|
|
evaluation of a boolean expression which sets <a href="#builtinvars"><code>$?</code></a>.
|
|
This command is used most frequently as the conditional command following the
|
|
<code>if</code> in the <a href="#conditional"><code>if-then[-else]-fi</code></a> construct.
|
|
</p>
|
|
<p><b>Expression Syntax:</b></p>
|
|
<ul>
|
|
<p>
|
|
expression = simple-expression | !expression | expression -o expression | expression -a expression
|
|
</p>
|
|
<p>
|
|
simple-expression = unary-expression | binary-expression
|
|
</p>
|
|
<p>
|
|
unary-expression = string-unary | file-unary
|
|
</p>
|
|
<p>
|
|
string-unary = -n string | -z string
|
|
</p>
|
|
<p>
|
|
file-unary = -b file | -c file | -d file | -e file | -f file | -r file | -s file | -w file
|
|
</p>
|
|
<p>
|
|
binary-expression = string-binary | numeric-binary
|
|
</p>
|
|
<p>
|
|
string-binary = string = string | string == string | string != string
|
|
</p>
|
|
<p>
|
|
numeric-binary = integer -eq integer | integer -ge integer | integer -gt integer | integer -le integer |
|
|
integer -lt integer | integer -ne integer
|
|
</p>
|
|
</ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdcat"><h2>2.2 Concatenate Files (cat)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
cat <code><path></code> [<code><path></code> [<code><path></code> ...]]
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
This command copies and concatentates all of the files at <code><path></code>
|
|
to the console (or to another file if the output is redirected).
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdcd"><h2>2.3 Change Current Working Directory (cd)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
cd [<dir-path>|-|~|..]
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Changes the current working directory (<code>PWD</code>). Also sets the
|
|
previous working directory environment variable (<code>OLDPWD</code>).
|
|
<p>
|
|
<p><b>Forms:</b></p>
|
|
<ul><table>
|
|
<tr>
|
|
<td><b><code>cd <dir-path></code></b></td>
|
|
<td>sets the current working directory to <code><dir-path></code>.</td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>cd -</code></b></td>
|
|
<td>sets the current working directory to the previous
|
|
working directory ($<a href="#environvars"><code>OLDPWD</code></a>).
|
|
Equivalent to <code><a href="#cmdcd">cd</a> $<a href="#environvars">OLDPWD</a></code>.</td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>cd</code> or <b><code>cd ~</code></b></td>
|
|
<td>set the current working directory to the 'home'
|
|
directory. The <i>home</i> directory can be configured by setting
|
|
<code>CONFIG_LIB_HOMEDIR</code> in the configuration file. The default
|
|
<i>home</i> directory is <code>/</code>.</td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>cd ..</code></td>
|
|
<td>sets the current working directory to the parent directory.</td>
|
|
</tr>
|
|
</table></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdcp"><h2>2.4 Copy Files (cp)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
cp <source-path> <dest-path>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Copy of the contents of the file at <code><source-path></code> to the location
|
|
in the filesystem indicated by <code><dest-path></code>.
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmddate"><h2>2.5 Show or set the date and time (date)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
date [-s "MMM DD HH:MM:SS YYYY"]
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Show or set the current date and time.
|
|
This command is only supported if the platform supported RTC hardware (<code>CONFIG_RTC=y</code>).
|
|
</p>
|
|
<p>
|
|
Only one format is used both on display and when setting the date/time:
|
|
<code>MMM DD HH:MM:SS YYYY</code>. For example,
|
|
<ul><pre>
|
|
data -s "Sep 1 11:30:00 2011"
|
|
</pre></ul>
|
|
</p>
|
|
<p>
|
|
24-hour time is used.
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmddd"><h2>2.6 Copy and Convert Files (dd)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
dd if=<infile> of=<outfile> [bs=<sectsize>] [count=<sectors>] [skip=<sectors>]
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Copy blocks from <infile> to <outfile>.
|
|
<infile> or <outfile> may be the path to a standard file, a character device, or a block device.
|
|
Examples follow:
|
|
</p>
|
|
<ol>
|
|
<li>
|
|
Read from character device, write to regular file.
|
|
This will create a new file of the specified size filled with zero.
|
|
<ul><pre>
|
|
nsh> ls -l /dev
|
|
/dev:
|
|
crw-rw-rw- 0 zero
|
|
nsh> dd if=/dev/zero of=/tmp/zeros bs=64 count=16
|
|
nsh> ls -l /tmp
|
|
/tmp:
|
|
-rw-rw-rw- 1024 ZEROS
|
|
</pre></ul>
|
|
</li>
|
|
<li>
|
|
Read from character device, write to block device.
|
|
This will fill the entire block device with zeros.
|
|
</li>
|
|
<ul><pre>
|
|
nsh> ls -l /dev
|
|
/dev:
|
|
brw-rw-rw- 0 ram0
|
|
crw-rw-rw- 0 zero
|
|
nsh> dd if=/dev/zero of=/dev/ram0
|
|
</pre></ul>
|
|
</li>
|
|
<li>
|
|
Read from a block devic, write to a character device. This
|
|
will read the entire block device and dump the contents in
|
|
the bit bucket.
|
|
</li>
|
|
<ul><pre>
|
|
nsh> ls -l /dev
|
|
/dev:
|
|
crw-rw-rw- 0 null
|
|
brw-rw-rw- 0 ram0
|
|
nsh> dd if=/dev/ram0 of=/dev/null
|
|
</pre></ul>
|
|
</li>
|
|
</ol>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmddf"><h2>2.7 Show Volument Status (df)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
df
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Show the state of each mounted volume.
|
|
As an example:
|
|
</p>
|
|
<ul><pre>
|
|
nsh> mount
|
|
/etc type romfs
|
|
/tmp type vfat
|
|
nsh> df
|
|
Block Number
|
|
Size Blocks Used Available Mounted on
|
|
64 6 6 0 /etc
|
|
512 985 2 983 /tmp
|
|
nsh>
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdecho"><h2>2.8 Echo Strings and Variables (echo)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
echo [<string|$name> [<string|$name>...]]
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Copy the sequence of strings and expanded environment variables to
|
|
console output (or to a file if the output is re-directed).
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdexec"><h2>2.9 Execute User Code (exec)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
exec <hex-address>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Execute the user logic at address <code><hex-address></code>. NSH will pause
|
|
until the execution unless the user logic is executed in background
|
|
via <code><a href="#cmdexec">exec</a> <hex-address> &</code>.
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdexit"><h2>2.10 Exit NSH (exit)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
exit
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Exit NSH. Only useful for the serial front end if you have started some other tasks (perhaps
|
|
using the <code><a href="#cmdexec">exec</a></code> command) and you would like to have NSH out of the
|
|
way. For the telnet front-end, <code>exit</code> terminates the telenet session.
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdfree"><h2>2.11 Show Memory Manager Status (free)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
free
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Show the current state of the memory allocator. For example,
|
|
</p>
|
|
<ul><pre>
|
|
nsh> free
|
|
total used free largest
|
|
Mem: 4194288 1591552 2602736 2601584
|
|
nsh>
|
|
</pre></ul>
|
|
<p><b>Where:</b></p>
|
|
<ul><table>
|
|
<tr>
|
|
<td><b><code>total</code></b></td>
|
|
<td>This is the total size of memory allocated for use by malloc in bytes.</td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>used</code></b></td>
|
|
<td>This is the total size of memory occupied by chunks handed out by malloc.</td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>free</code></b></td>
|
|
<td>This is the total size of memory occupied by free (not in use) chunks.</td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>largest</code></b></td>
|
|
<td>Size of the largest free (not in use) chunk.</td>
|
|
</tr>
|
|
</table></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdget"><h2>2.12 Get File Via TFTP (get)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
get [-b|-n] [-f <local-path>] -h <ip-address> <remote-path>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Copy the file at <code><remote-address></code> from the host whose IP address is
|
|
identified by <code><ip-address></code>.
|
|
</p>
|
|
<p><b>Other options:</b></p>
|
|
<ul><table>
|
|
<tr>
|
|
<td><b><code>-f <local-path></code></b></td>
|
|
<td>
|
|
The file will be saved relative to the current working directory
|
|
unless <code><local-path></code> is provided.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>-b|-n</code></b></td>
|
|
<td>
|
|
Selects either binary ("octect") or test ("netascii") transfer
|
|
mode. Default: text.
|
|
</td>
|
|
</tr>
|
|
</table></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdhelp"><h2>2.13 Show Usage Command Usage (help)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
help [-v] [<cmd>]
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Presents summary information about NSH commands to console.
|
|
</p>
|
|
<p><b>Options:</b></p>
|
|
<ul><table>
|
|
<tr>
|
|
<td><b><code>-v</code></b></td>
|
|
<td>
|
|
how verbose output will full command usage.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code><cmd></code></b></td>
|
|
<td>
|
|
Show full command usage only for this command.
|
|
</td>
|
|
</tr>
|
|
</table></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdifconfig"><h2>2.14 Show Network Configuration (ifconfig)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
ifconfig [nic_name [ip_address]]
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Two forms of the <code>ifconfig</code>command are supported:
|
|
</p>
|
|
<ol>
|
|
<li>
|
|
<p>
|
|
With one or no arguments, <code>ifconfig</code> will shows the
|
|
current configuration of the network and, perhaps, the status of ethernet
|
|
device:
|
|
</p>
|
|
<ul><pre>
|
|
ifconfig
|
|
ifconfig [nic_name]
|
|
</pre></ul>
|
|
<p>
|
|
As an example:
|
|
</p>
|
|
<ul><pre>
|
|
nsh> ifconfig
|
|
eth0 HWaddr 00:18:11:80:10:06
|
|
IPaddr:10.0.0.2 DRaddr:10.0.0.1 Mask:255.255.255.0
|
|
</pre></ul>
|
|
<p>
|
|
If uIP statistics are enabled (<code>CONFIG_NET_STATISTICS</code>), then
|
|
this command will also show the detailed state of uIP.
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
If both the network interface name and an IP address are supplied as arguments,
|
|
then <code>ifconfig</code> will set the address of the ethernet device:
|
|
</p>
|
|
<ul><pre>
|
|
ifconfig nic_name ip_address
|
|
</pre><ul>
|
|
</li>
|
|
</ol>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdkill"><h2>2.15 Send a signal to a task (kill)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<ul><pre>
|
|
kill -<signal> <pid>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Send the <signal> to the task identified by <pid>.
|
|
</p>
|
|
<ul><pre>
|
|
nsh> mkfifo /dev/fifo
|
|
nsh> cat /dev/fifo &
|
|
cat [2:128]
|
|
nsh> ps
|
|
PID PRI SCHD TYPE NP STATE NAME
|
|
0 0 FIFO TASK READY Idle Task()
|
|
1 128 FIFO TASK RUNNING init()
|
|
2 128 FIFO PTHREAD WAITSEM <pthread>(51ea50)
|
|
nsh> kill -9 2
|
|
nsh: cat: open failed: 4
|
|
nsh> ps
|
|
PID PRI SCHD TYPE NP STATE NAME
|
|
0 0 FIFO TASK READY Idle Task()
|
|
1 128 FIFO TASK RUNNING init()
|
|
nsh>
|
|
</pre></ul>
|
|
<p><small>
|
|
<b>NOTE</b>:
|
|
NuttX does not support a FULL POSIX signalling system.
|
|
Standard signals like SIGCHLD, SIGINTR, SIGKILL, etc. do not exist in NuttX and sending those signal may not have the result that you expect.
|
|
Rather, NuttX supports only what are referred to as POSIX real-time signals.
|
|
These signals may be used to communicate with running tasks, may be use to waiting waiting tasks, etc.
|
|
But, as an example, <code>kill -9</code> (SIGKILL) will not terminate a task.
|
|
</p></small>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdlosetup"><h2>2.16 Setup/teardown the Loop Device (losetup)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax 1:</b></p>
|
|
<ul><pre>
|
|
losetup [-o <offset>] [-r] <dev-path> <file-path>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Setup the loop device at <dev-path> to access the file at <file-path> as a block device.
|
|
In the following example a 256K file is created (<code>dd</code>) and <code>losetup</code> is
|
|
used to make the file accessible as a block device.
|
|
A FAT file system is created (<code>mkfatfs</code>) and mounted (<code>mount</code>).
|
|
Files can then be managed on the loop-mounted file.
|
|
<ul><pre>
|
|
nsh> dd if=/dev/zero of=/tmp/image bs=512 count=512
|
|
nsh> ls -l /tmp
|
|
/tmp:
|
|
-rw-rw-rw- 262144 IMAGE
|
|
nsh> losetup /dev/loop0 /tmp/image
|
|
nsh> ls -l /dev
|
|
/dev:
|
|
brw-rw-rw- 0 loop0
|
|
nsh> mkfatfs /dev/loop0
|
|
nsh> mount -t vfat /dev/loop0 /mnt/example
|
|
nsh> ls -l /mnt
|
|
ls -l /mnt
|
|
/mnt:
|
|
drw-rw-rw- 0 example/
|
|
nsh> echo "This is a test" >/mnt/example/atest.txt
|
|
nsh> ls -l /mnt/example
|
|
/mnt/example:
|
|
-rw-rw-rw- 16 ATEST.TXT
|
|
nsh> cat /mnt/example/atest.txt
|
|
This is a test
|
|
nsh>
|
|
</pre></ul>
|
|
</p>
|
|
|
|
<p><b>Command Syntax 2:</b></p>
|
|
<ul><pre>
|
|
losetup d <dev-path>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Teardown the setup for the loop device at <dev-path>.
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdls"><h2>2.17 List Directory Contents (ls)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
ls [-lRs] <dir-path>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Show the contents of the directory at <code><dir-path></code>. NOTE:
|
|
<code><dir-path></code> must refer to a directory and no other filesystem
|
|
object.
|
|
</p>
|
|
<p><b>Options:</b></p>
|
|
<ul><table>
|
|
<tr>
|
|
<td><b><code>-R</code></b></td>
|
|
<td>Show the constents of specified directory and all of its
|
|
sub-directories.</td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>-s</code></b></td>
|
|
<td>Show the size of the files along with the filenames in the
|
|
listing</td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>-l</code></b></td>
|
|
<td>Show size and mode information along with the filenames
|
|
in the listing.</td>
|
|
</tr>
|
|
</table></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdmbhw"><h2>2.18 Access Memory (mb, mh, and mw)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
mb <hex-address>[=<hex-value>][ <hex-byte-count>]
|
|
mh <hex-address>[=<hex-value>][ <hex-byte-count>]
|
|
mw <hex-address>[=<hex-value>][ <hex-byte-count>]
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Access memory using byte size access (mb), 16-bit accesses (mh),
|
|
or 32-bit access (mw). In each case,
|
|
</p>
|
|
<ul><table>
|
|
<tr>
|
|
<td><code><hex-address></code>.</td>
|
|
<td>Specifies the address to be accessed. The current
|
|
value at that address will always be read and displayed.
|
|
</tr>
|
|
<tr>
|
|
<td><code><hex-address>=<hex-value></code>.</td>
|
|
<td>Read the value, then write <code><hex-value></code>
|
|
to the location.
|
|
</tr>
|
|
<tr>
|
|
<td><code><hex-byte-count></code>.</td>
|
|
<td>Perform the mb, mh, or mw operation on a total
|
|
of <code><hex-byte-count></code> bytes, increment the <code><hex-address></code> appropriately
|
|
after each access
|
|
</tr>
|
|
</table></ul>
|
|
<p><b>Example:</b><p>
|
|
<ul><pre>
|
|
nsh> mh 0 16
|
|
0 = 0x0c1e
|
|
2 = 0x0100
|
|
4 = 0x0c1e
|
|
6 = 0x0110
|
|
8 = 0x0c1e
|
|
a = 0x0120
|
|
c = 0x0c1e
|
|
e = 0x0130
|
|
10 = 0x0c1e
|
|
12 = 0x0140
|
|
14 = 0x0c1e
|
|
nsh>
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdps"><h2>2.19 Show Current Tasks and Threads (ps)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
ps
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Show the currently active threads and tasks. For example,
|
|
</p>
|
|
<ul><pre>
|
|
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>
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdmkdir"><h2>2.20 Create a Directory (mkdir)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
mkdir <path>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Create the directory at <code><path></code>.
|
|
All components of of <code><path></code> except the final directory name must exist on a mounted file
|
|
system; the final directory must not.
|
|
</p>
|
|
<p>
|
|
<b>Limited to Mounted File Systems</b>.
|
|
Recall that NuttX uses a <a href="NuttxUserGuide.html#FileSystemOverview"><i>pseudo</i> filesystem</a> for its root file
|
|
system.
|
|
The <code>mkdir</code> command can only be used to create directories in volumes set up with the
|
|
<a href="#cmdmount"><code>mount</code></a> command; it cannot be used to create directories in the <i>pseudo</i> filesystem.
|
|
</p>
|
|
<p><b>Example:</b></p>
|
|
<ul><pre>
|
|
nsh> mkdir /mnt/fs/tmp
|
|
nsh> ls -l /mnt/fs
|
|
/mnt/fs:
|
|
drw-rw-rw- 0 TESTDIR/
|
|
drw-rw-rw- 0 TMP/
|
|
nsh>
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdmkfatfs"><h2>2.21 Create a FAT Filesystem (mkfatfs)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
mkfatfs <path>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Format a fat file system on the block device specified by <code><path></code>.
|
|
NSH provides this command to access the <a href="mkfatfs"><code>mkfatfs()</code></a> NuttX API.
|
|
This block device must reside in the NuttX <a href="NuttxUserGuide.html#FileSystemOverview"><i>pseudo</i> filesystem</a> and
|
|
must have been created by some call to <code>register_blockdriver()</code> (see <code>include/nuttx/fs/fs.h</code>).
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdmkfifo"><h2>2.22 Create a FIFO (mkfifo)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
mkfifo <path>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Creates a FIFO character device anywhere in the pseudo file system, creating
|
|
whatever pseudo directories that may be needed to complete the <code><path></code>.
|
|
By convention, however, device drivers are place in the standard <code>/dev</code> directory.
|
|
After it is created, the FIFO device may be used as any other device driver.
|
|
NSH provides this command to access the <a href="NuttxUserGuide.html#mkfifo"><code>mkfifo()</code></a> NuttX API.
|
|
</p>
|
|
<p><b>Example</b></p>
|
|
<ul><pre>
|
|
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>
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdmkrd"><h2>2.23 Create a RAMDISK (mkrd)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
mkrd [-m <minor>] [-s <sector-size>] <nsectors>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Create a ramdisk consisting of <code><nsectors></code>, each of size
|
|
<code><sector-size></code> (or 512 bytes if <code><sector-size></code> is not specified.
|
|
The ramdisk will be registered as <code>/dev/ram<n></code> (if <code><n></code> is not
|
|
specified, mkrd will attempt to register the ramdisk as <code>/dev/ram0</code>.
|
|
</p>
|
|
<p><b>Example</b></p>
|
|
<ul><pre>
|
|
nsh> ls /dev
|
|
/dev:
|
|
console
|
|
null
|
|
ttyS0
|
|
ttyS1
|
|
nsh> mkrd 1024
|
|
nsh> ls /dev
|
|
/dev:
|
|
console
|
|
null
|
|
ram0
|
|
ttyS0
|
|
ttyS1
|
|
nsh>
|
|
</pre></ul>
|
|
<p>
|
|
Once the ramdisk has been created, it may be formatted using
|
|
the <code>mkfatfs</code> command and mounted using the <code>mount</code> command.
|
|
</p>
|
|
<p><b>Example</b></p>
|
|
<ul><pre>
|
|
nsh> mkrd 1024
|
|
nsh> mkfatfs /dev/ram0
|
|
nsh> mount -t vfat /dev/ram0 /tmp
|
|
nsh> ls /tmp
|
|
/tmp:
|
|
nsh>
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdmount"><h2>2.24 Mount a File System (mount)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
mount -t <fstype> <block-device> <code><dir-path></code>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
The <code>mount</code> command performs one of two different operations.
|
|
If no paramters are provided on the command line after the <code>mount</code> command, then the <code>mount</code> command will enumerate all of the current mountpoints on the console.
|
|
</p>
|
|
<p>
|
|
If the mount parameters are provied on the command after the <code>mount</code> command, then the <code>mount</code> command will mount a file system in the NuttX pseudo-file system.
|
|
<code>mount</code>' performs a three way association, binding:
|
|
</p>
|
|
<ol>
|
|
<li><b>File system.</b>
|
|
The '-t <code><fstype></code>' option identifies the type of
|
|
file system that has been formatted on the <code><block-device></code>.
|
|
As of this writing, <code>vfat</code> is the only supported value for <code><fstype></code>
|
|
</li>
|
|
<li><b>Block Device.</b>
|
|
The <code><block-device></code> argument is the full or relative
|
|
path to a block driver inode in the <a href="NuttxUserGuide.html#FileSystemOverview"><i>pseudo</i> filesystem</a>.
|
|
By convention, this is a name under the <code>/dev</code> sub-directory.
|
|
This <code><block-device></code> must have been previously formatted with the same file system
|
|
type as specified by <code><fstype></code>
|
|
</li>
|
|
<li><b>Mount Point.</b>
|
|
The mount point, <code><dir-path></code>, is the location in the
|
|
<a href="NuttxUserGuide.html#FileSystemOverview"><i>pseudo</i> filesystem</a> where the mounted volume will appear.
|
|
This mount point can only reside in the NuttX <a href="NuttxUserGuide.html#FileSystemOverview"><i>pseudo</i> filesystem</a>.
|
|
By convention, this mount point is a subdirectory under <code>/mnt</code>.
|
|
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.
|
|
</li>
|
|
</ol>
|
|
<p>
|
|
After the volume has been mounted in the NuttX
|
|
<a href="NuttxUserGuide.html#FileSystemOverview"><i>pseudo</i> filesystem</a>,
|
|
it may be access in the same way as other objects in thefile system.
|
|
</p>
|
|
<p><b>Examples</b>:</p>
|
|
<p>Using <code>mount</code> to mount a file system:</p>
|
|
<ul><pre>
|
|
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>
|
|
</pre></ul>
|
|
<p>Using <code>mount</code> to enumerate mounts:</p>
|
|
<ul><pre>
|
|
nsh> mount
|
|
/etc type romfs
|
|
/mnt/fs type vfat
|
|
/tmp type vfat
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdmv"><h2>2.25 Rename a File (mv)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
mv <old-path> <new-path>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Rename the file object at <code><old-path></code> to <code><new-path></code>.
|
|
Both paths must reside in the same mounted filesystem.
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdnfsmount"><h2>2.26 Mount an NFS file system (nfsmount)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<a href="#"></a>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
nfsmount <server-address> <mount-point> <remote-path>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
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.
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdping"><h2>2.27 Check Network Peer (ping)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
ping [-c <count>] [-i <interval>] <ip-address>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Test the network communication with a remote peer. Example,
|
|
</p>
|
|
<ul><pre>
|
|
nsh> ping 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>
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdput"><h2>2.28 Send File Via TFTP (put)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
put [-b|-n] [-f <remote-path>] -h <ip-address> <local-path>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Copy the file at <code><local-address></code> to the host whose IP address is
|
|
identified by <code><ip-address></code>.
|
|
</p>
|
|
<p><b>Other options:</b></p>
|
|
<ul><table>
|
|
<tr>
|
|
<td><b><code>-f <remote-path></code></b></td>
|
|
<td>
|
|
The file will be saved relative with the same name on the host
|
|
unless <code><remote-path></code> is provided.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>-b|-n</code></b></td>
|
|
<td>
|
|
Selects either binary ("octect") or test ("netascii") transfer
|
|
mode. Default: text.
|
|
</td>
|
|
</tr>
|
|
</table></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdpwd"><h2>2.29 Show Current Working Directory (pwd)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
pwd
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Show the current working directory.
|
|
</p>
|
|
<ul><pre>
|
|
nsh> cd /dev
|
|
nsh> pwd
|
|
/dev
|
|
nsh>
|
|
</pre></ul>
|
|
|
|
<p>Same as <code><a href="#cmdecho">echo</a> <a href="#environvars">$PWD</a></code>.</p>
|
|
<ul><pre>
|
|
nsh> echo $PWD
|
|
/dev
|
|
nsh>
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdrm"><h2>2.30 Remove a File (rm)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
rm <file-path>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Remove the specified <code><file-path></code> name from the mounted file system.
|
|
Recall that NuttX uses a <a href="NuttxUserGuide.html#FileSystemOverview"><i>pseudo</i> filesystem</a> for its root file
|
|
system.
|
|
The <code>rm</code> command can only be used to remove (unlink) files in volumes set up with the
|
|
<a href="#cmdmount"><code>mount</code></a> command;
|
|
it cannot be used to remove names in the <i>pseudo</i> filesystem.
|
|
</p>
|
|
<p><b>Example:</b></p>
|
|
<ul><pre>
|
|
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>
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdrmdir"><h2>2.31 Remove a Directory (rmdir)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
rmdir <dir-path>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Remove the specified <code><dir-path></code> directory from the mounted file system.
|
|
Recall that NuttX uses a <a href="NuttxUserGuide.html#FileSystemOverview"><i>pseudo</i> filesystem</a> for its root file
|
|
system.
|
|
The <code>rmdir</code> command can only be used to remove directories from volumes set up with the
|
|
<a href="#cmdmount"><code>mount</code></a> command;
|
|
it cannot be used to remove directories from the <i>pseudo</i> filesystem.
|
|
</p>
|
|
<p><b>Example:</b></p>
|
|
<ul><pre>
|
|
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
|
|
/mnt/fs:
|
|
drw-rw-rw- 0 TESTDIR/
|
|
nsh>
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdset"><h2>2.32 Set an Environment Variable (set)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
set <name> <value>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Set the environment variable <code><name></code> to the string <code><value></code>.
|
|
For example,
|
|
</p>
|
|
<ul><pre>
|
|
nsh> echo $foobar
|
|
|
|
nsh> set foobar foovalue
|
|
nsh> echo $foobar
|
|
foovalue
|
|
nsh>
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdsh"><h2>2.33 Execute an NSH Script (sh)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
sh <script-path>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Execute the sequence of NSH commands in the file referred
|
|
to by <code><script-path></code>.
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdsleep"><h2>2.34 Wait for Seconds (sleep)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
sleep <sec>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Pause execution (sleep) for <code><sec></code> seconds.
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdunmount"><h2>2.35 Unmount a File System (umount)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
umount <dir-path>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Un-mount the file system at mount point <code><dir-path></code>.
|
|
The <code>umount</code> command can only be used to un-mount volumes previously mounted using
|
|
<a href="#cmdmount"><code>mount</code></a> command.
|
|
</p>
|
|
<p><b>Example:</b></p>
|
|
<ul><pre>
|
|
nsh> ls /mnt/fs
|
|
/mnt/fs:
|
|
TESTDIR/
|
|
nsh> umount /mnt/fs
|
|
nsh> ls /mnt/fs
|
|
/mnt/fs:
|
|
nsh: ls: no such directory: /mnt/fs
|
|
nsh>
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdunset"><h2>2.36 Unset an Environment Variable (unset)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
unset <name>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Remove the value associated with the environment variable
|
|
<code><name></code>. Example:
|
|
</p>
|
|
<ul><pre>
|
|
nsh> echo $foobar
|
|
foovalue
|
|
nsh> unset foobar
|
|
nsh> echo $foobar
|
|
|
|
nsh>
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdusleep"><h2>2.37 Wait for Microseconds (usleep)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
usleep <usec>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Pause execution (sleep) of <code><usec></code> microseconds.
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdwget">2.37 Get File Via HTTP (wget)</a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
wget [-o <local-path>] <url>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Use HTTP to copy the file at <code><url></code> to the current directory.
|
|
</p>
|
|
<p><b>Options:</b></p>
|
|
<ul><table>
|
|
<tr>
|
|
<td><b><code>-o <local-path></code></b></td>
|
|
<td>
|
|
The file will be saved relative to the current working directory
|
|
and with the same name as on the HTTP server unless <code><local-path></code> is provided.
|
|
</td>
|
|
</tr>
|
|
</table></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmdxd"><h2>2.38 Hexadecimal dump (xd)</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p><b>Command Syntax:</b></p>
|
|
<ul><pre>
|
|
xd <hex-address> <byte-count>
|
|
</pre></ul>
|
|
<p>
|
|
<b>Synopsis</b>.
|
|
Dump <code><byte-count></code> bytes of data from address <code><hex-address></code>.
|
|
</p>
|
|
<p><b>Example:</b></p>
|
|
<ul><pre>
|
|
nsh> xd 410e0 512
|
|
Hex dump:
|
|
0000: 00 00 00 00 9c 9d 03 00 00 00 00 01 11 01 10 06 ................
|
|
0010: 12 01 11 01 25 08 13 0b 03 08 1b 08 00 00 02 24 ....%..........$
|
|
...
|
|
01f0: 08 3a 0b 3b 0b 49 13 00 00 04 13 01 01 13 03 08 .:.;.I..........
|
|
nsh>
|
|
</pre></ul>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="configuration"><h1>3.0 Configuration Settings</h1></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p>
|
|
The availability of the above commands depends upon features that
|
|
may or may not be enabled in the NuttX configuration file. The
|
|
following <a href="#cmddependencies">table</a> indicates the dependency of each command on NuttX
|
|
configuration settings. General configuration settings are discussed
|
|
in the <a href="NuttxPortingGuide.html">NuttX Porting Guide.</a>
|
|
Configuration settings specific to NSH as discussed at the <a href="#nshconfiguration">bottom</a> of this document.
|
|
</p>
|
|
|
|
<p>
|
|
Note that in addition to general NuttX configuation settings, each NSH command can be
|
|
individually disabled via the settings in the rightmost column.
|
|
All of these settings make the configuration of NSH potentially complex but also allow it to
|
|
squeeze into very small memory footprints.
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="cmddependencies"><h2>3.1 Command Dependencies on Configuration Settings</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<center><p>Table. Command Dependencies on Configuration Settings</p>
|
|
<table width="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<th align="left" width="25%">Command</th>
|
|
<th align="left">Depends on Configuration</th>
|
|
<th align="left">Can Be Disabled with</th>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>[</code></b></td>
|
|
<td>!<code>CONFIG_NSH_DISABLESCRIPT</code></td>
|
|
<td><code>CONFIG_NSH_DISABLE_TEST</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>cat</code></b></td>
|
|
<td><code>CONFIG_NFILE_DESCRIPTORS</code> > 0</td>
|
|
<td><code>CONFIG_NSH_DISABLE_CAT</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>cd</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_ENVIRON</code> && <code>CONFIG_NFILE_DESCRIPTORS</code> > 0</td>
|
|
<td><code>CONFIG_NSH_DISABLE_CD</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>cp</code></b></td>
|
|
<td><code>CONFIG_NFILE_DESCRIPTORS</code> > 0</td>
|
|
<td><code>CONFIG_NSH_DISABLE_CP</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>date</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_CLOCK</code> && <code>CONFIG_RTC</code></td>
|
|
<td><code>CONFIG_NSH_DISABLE_DATE</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>dd</code></b></td>
|
|
<td><code>CONFIG_NFILE_DESCRIPTORS</code> > 0</td>
|
|
<td><code>CONFIG_NSH_DISABLE_DD</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>df</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_MOUNTPOINT</code> && <code>CONFIG_NFILE_DESCRIPTORS</code> > 0 && <code>CONFIG_FS_READABLE</code><sup>3</sup></td>
|
|
<td><code>CONFIG_NSH_DISABLE_DF</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>echo</code></b></td>
|
|
<td><br></td>
|
|
<td><code>CONFIG_NSH_DISABLE_ECHO</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>exec</code></b></td>
|
|
<td><br></td>
|
|
<td><code>CONFIG_NSH_DISABLE_EXEC</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>exit</code></b></td>
|
|
<td><br></td>
|
|
<td><code>CONFIG_NSH_DISABLE_EXIT</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>free</code></b></td>
|
|
<td><br></td>
|
|
<td><code>CONFIG_NSH_DISABLE_FREE</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>get</code></b></td>
|
|
<td><code>CONFIG_NET</code> && <code>CONFIG_NET_UDP</code> &&
|
|
<code>CONFIG_NFILE_DESCRIPTORS</code> > 0 && <code>CONFIG_NET_BUFSIZE</code> >= 558<sup>1</sup></td>
|
|
<td><code>CONFIG_NSH_DISABLE_GET</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>help</code></b><sup>5</sup></td>
|
|
<td><br></td>
|
|
<td><code>CONFIG_NSH_DISABLE_HELP</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>ifconfig</code></b></td>
|
|
<td><code>CONFIG_NET</code></td>
|
|
<td><code>CONFIG_NSH_DISABLE_IFCONFIG</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>kill</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_SIGNALS</code></td>
|
|
<td><code>CONFIG_NSH_DISABLE_KILL</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>losetup</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_MOUNTPOINT</code> && <code>CONFIG_NFILE_DESCRIPTORS</code> > 0</td>
|
|
<td><code>CONFIG_NSH_DISABLE_LOSETUP</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>ls</code></b></td>
|
|
<td><code>CONFIG_NFILE_DESCRIPTORS</code> > 0</td>
|
|
<td><code>CONFIG_NSH_DISABLE_LS</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>mb,mh,mw</code></b></td>
|
|
<td><br></td>
|
|
<td>
|
|
<code>CONFIG_NSH_DISABLE_MB</code>,<br>
|
|
<code>CONFIG_NSH_DISABLE_MH</code>,<br>
|
|
<code>CONFIG_NSH_DISABLE_MW</code>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>mkdir</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_MOUNTPOINT</code> && <code>CONFIG_NFILE_DESCRIPTORS</code> > 0 && <code>CONFIG_FS_WRITABLE</code><sup>4</sup></td>
|
|
<td><code>CONFIG_NSH_DISABLE_MKDIR</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>mkfatfs</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_MOUNTPOINT</code> && <code>CONFIG_NFILE_DESCRIPTORS</code> > 0 && <code>CONFIG_FS_FAT</code></td>
|
|
<td><code>CONFIG_NSH_DISABLE_MKFATFS</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>mkfifo</code></b></td>
|
|
<td><code>CONFIG_NFILE_DESCRIPTORS</code> > 0</td>
|
|
<td><code>CONFIG_NSH_DISABLE_MKFIFO</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>mkrd</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_MOUNTPOINT</code> && <code>CONFIG_NFILE_DESCRIPTORS</code> > 0 && <code>CONFIG_FS_WRITABLE</code><sup>4</sup></td>
|
|
<td><code>CONFIG_NSH_DISABLE_MKRD</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>mount</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_MOUNTPOINT</code> && <code>CONFIG_NFILE_DESCRIPTORS</code> > 0 && <code>CONFIG_FS_READABLE</code><sup>3</sup></td>
|
|
<td><code>CONFIG_NSH_DISABLE_MOUNT</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>mv</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_MOUNTPOINT</code> && <code>CONFIG_NFILE_DESCRIPTORS</code> > 0 && <code>CONFIG_FS_WRITABLE</code><sup>3</sup></td>
|
|
<td><code>CONFIG_NSH_DISABLE_MV</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>nfsmount</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_MOUNTPOINT</code> && <code>CONFIG_NFILE_DESCRIPTORS</code> > 0 && <code>CONFIG_NET</code> && <code>CONFIG_NFS</code></td>
|
|
<td><code>CONFIG_NSH_DISABLE_NFSMOUNT</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>ping</code></b></td>
|
|
<td><code>CONFIG_NET</code> && <code>CONFIG_NET_ICMP</code> &&
|
|
<code>CONFIG_NET_ICMP_PING</code> && !<code>CONFIG_DISABLE_CLOCK</code> &&
|
|
!<code>CONFIG_DISABLE_SIGNALS</code></td>
|
|
<td><code>CONFIG_NSH_DISABLE_PING</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>ps</code></b></td>
|
|
<td><br></td>
|
|
<td><code>CONFIG_NSH_DISABLE_PS</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>put</code></b></td>
|
|
<td><code>CONFIG_NET</code> && <code>CONFIG_NET_UDP</code> &&
|
|
<code>CONFIG_NFILE_DESCRIPTORS</code> > 0 && <code>CONFIG_NET_BUFSIZE</code> >= 558<sup>1,2</sup></td>
|
|
<td><code>CONFIG_NSH_DISABLE_PUT</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>pwd</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_ENVIRON</code> && <code>CONFIG_NFILE_DESCRIPTORS</code> > 0</td>
|
|
<td><code>CONFIG_NSH_DISABLE_PWD</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>rm</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_MOUNTPOINT</code> && <code>CONFIG_NFILE_DESCRIPTORS</code> > 0 && <code>CONFIG_FS_WRITABLE</code><sup>4</sup></td>
|
|
<td><code>CONFIG_NSH_DISABLE_RM</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>rmdir</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_MOUNTPOINT</code> && <code>CONFIG_NFILE_DESCRIPTORS</code> > 0 && <code>CONFIG_FS_WRITABLE</code><sup>4</sup></td>
|
|
<td><code>CONFIG_NSH_DISABLE_RMDIR</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>set</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_ENVIRON</code></td>
|
|
<td><code>CONFIG_NSH_DISABLE_SET</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>sh</code></b></td>
|
|
<td><code>CONFIG_NFILE_DESCRIPTORS > 0 && <code>CONFIG_NFILE_STREAMS > 0 && !<code>CONFIG_NSH_DISABLESCRIPT</code></td>
|
|
<td><code>CONFIG_NSH_DISABLE_SH</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>sleep</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_SIGNALS</code></td>
|
|
<td><code>CONFIG_NSH_DISABLE_SLEEP</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>test</code></b></td>
|
|
<td>!<code>CONFIG_NSH_DISABLESCRIPT</code></td>
|
|
<td><code>CONFIG_NSH_DISABLE_TEST</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>umount</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_MOUNTPOINT</code> && <code>CONFIG_NFILE_DESCRIPTORS</code> > 0 && <code>CONFIG_FS_READABLE</code><sup>3</sup></td>
|
|
<td><code>CONFIG_NSH_DISABLE_UMOUNT</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>unset</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_ENVIRON</code></td>
|
|
<td><code>CONFIG_NSH_DISABLE_UNSET</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>usleep</code></b></td>
|
|
<td>!<code>CONFIG_DISABLE_SIGNALS</code></td>
|
|
<td><code>CONFIG_NSH_DISABLE_USLEEP</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>wget</code></b></td>
|
|
<td><code>CONFIG_NET</code> && <code>CONFIG_NET_TCP</code> &&
|
|
<code>CONFIG_NFILE_DESCRIPTORS</code> > 0</td>
|
|
<td><code>CONFIG_NSH_DISABLE_WGET</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><b><code>xd</code></b></td>
|
|
<td><br></td>
|
|
<td><code>CONFIG_NSH_DISABLE_XD</code></td>
|
|
</tr>
|
|
</table></center>
|
|
|
|
<p><sup>1</sup><small>
|
|
Because of hardware padding, the actual required packet size may be larger</small><br>
|
|
<sup>2</sup><small>
|
|
Special TFTP server start-up optionss will probably be required to permit
|
|
creation of files for the correct operation of the <code>put</code> command.</small><br>
|
|
<sup>3</sup><small>
|
|
<code>CONFIG_FS_READABLE</code> is not a user configuration but is set automatically
|
|
if any readable filesystem is selected. At present, this is either <code>CONFIG_FS_FAT</code>
|
|
or <code>CONFIG_FS_ROMFS</code>.</small><br>
|
|
<sup>4</sup><small>
|
|
<code>CONFIG_FS_WRITABLE</code> is not a user configuration but is set automatically
|
|
if any writable filesystem is selected. At present, this is only <code>CONFIG_FS_FAT</code>.</small><br>
|
|
<sup>5</sup><small>
|
|
Verbose help output can be suppressed by defining <code>CONFIG_NSH_HELP_TERSE</code>.
|
|
In that case, the help command is still available but will be slightly smaller.
|
|
</small>
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="nshconfiguration"><h2>3.2 NSH-Specific Configuration Settings</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p>
|
|
The behavior of NSH can be modified with the following settings in
|
|
the <code>configs/<board-name>/defconfig</code> file:
|
|
</p>
|
|
|
|
<center><table width="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<th align="left" width="25%">Configuration</th>
|
|
<th align="left">Description</th>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_BUILTIN_APPS</code></b></td>
|
|
<td>
|
|
Support external registered, "named" applications that can be
|
|
executed from the NSH command line (see apps/README.txt for
|
|
more information).
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_FILEIOSIZE</code></b></td>
|
|
<td>
|
|
Size of a static I/O buffer used for file access (ignored if
|
|
there is no filesystem). Default is 1024.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_STRERROR</code></b></td>
|
|
<td>
|
|
<code>strerror(errno)</code> makes more readable output but <code>strerror()</code> is
|
|
very large and will not be used unless this setting is <i>y</i>.
|
|
This setting depends upon the <code>strerror()</code> having been enabled with <code>CONFIG_LIBC_STRERROR</code>.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_LINELEN</code></b></td>
|
|
<td>
|
|
The maximum length of one command line and of one output line.
|
|
Default: 80
|
|
</td>
|
|
</tr>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_NESTDEPTH</code></b></td>
|
|
<td>
|
|
The maximum number of nested <a href="#conditional"><code>if-then[-else]-fi</code></a> sequences that
|
|
are permissable. Default: 3
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_DISABLESCRIPT</code></b></td>
|
|
<td>
|
|
This can be set to <i>y</i> to suppress support for scripting. This
|
|
setting disables the <a href="#cmdsh"><code>sh</code></a>, <a href="#cmdtest"><code>test</code></a>, and <a href="#cmtest"><code>[</code></a> commands and the
|
|
<a href="#conditional"><code>if-then[-else]-fi</code></a> construct. This would only be set on systems
|
|
where a minimal footprint is a necessity and scripting is not.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_DISABLEBG</code></b></td>
|
|
<td>
|
|
This can be set to <i>y</i> to suppress support for background
|
|
commands. This setting disables the <a href="#cmdoverview"><code>nice</code></a> command prefix and
|
|
the <a href="#cmdoverview"><code>&</code></a> command suffix. This would only be set on systems
|
|
where a minimal footprint is a necessity and background command execution is not.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_MMCSDMINOR</code></b></td>
|
|
<td>
|
|
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 <code>/dev/mmcsd</code><i>N</i> where <i>N</i> is the minor number.
|
|
Default is zero.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_ROMFSETC</code></b></td>
|
|
<td>
|
|
Mount a ROMFS filesystem at <code>/etc</code> and provide a startup script
|
|
at <code>/etc/init.d/rcS</code>. The default startup script will mount
|
|
a FAT FS RAMDISK at <code>/tmp</code> but the logic is
|
|
<a href="#startupscript">easily extensible</a>.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_CONSOLE</code></b></td>
|
|
<td>
|
|
<p>
|
|
If <code>CONFIG_NSH_CONSOLE</code> is set to <i>y</i>, then a serial
|
|
console front-end is selected.
|
|
</p>
|
|
<p>
|
|
Normally, the serial console device is a UART and RS-232 interface.
|
|
However, if <code>CONFIG_USBDEV</code> is defined, then a USB serial device may, instead, be used if the one of the following are defined:
|
|
</p>
|
|
<ul>
|
|
<li>
|
|
<code>CONFIG_PL2303</code> and <code>CONFIG_PL2303_CONSOLE</code>.
|
|
Sets up the Prolifics PL2303 emulation as a console device at <code>/dev/console</code>.
|
|
</li>
|
|
<li>
|
|
<code>CONFIG_CDCACM</code> and <code>CONFIG_CDCACM_CONSOLE</code>.
|
|
Sets up the CDC/ACM serial device as a console device at <code>/dev/console</code>.
|
|
</li>
|
|
<li>
|
|
<code>CONFIG_NSH_USBCONSOLE</code>.
|
|
If defined, then the an arbitrary USB device may be used to as the NSH console.
|
|
In this case, <code>CONFIG_NSH_CONDEV</code> must be defined to indicate which USB device to use as the console.
|
|
The advantage of using a device other that /dev/console is that normal debug output can not use /dev/console while NSH uses <code>CONFIG_NSH_USBCONDEV</code>.
|
|
<p>
|
|
<code>CONFIG_NSH_USBCONDEV</code>.
|
|
If <code>CONFIG_NSH_USBCONSOLE</code> is set to 'y', then <code>CONFIG_NSH_USBCONDEV</code> must also be set to select the USB device used to support the NSH console.
|
|
This should be set to the quoted name of a readable/write-able USB driver such as: <code>CONFIG_NSH_USBCONDEV="/dev/ttyACM0"</code>.
|
|
</p>
|
|
</li>
|
|
</ul>
|
|
<p>
|
|
If there are more than one USB slots, then a USB device minor number may also need to be provided:
|
|
</p>
|
|
<ul>
|
|
<li>
|
|
<code>CONFIG_NSH_UBSDEV_MINOR</code>.
|
|
The minor device number of the USB device. Default: 0
|
|
</li>
|
|
</ul>
|
|
<p>
|
|
If USB tracing is enabled (<code>CONFIG_USBDEV_TRACE</code>), then NSH will initialize USB tracing as requested by the following.
|
|
Default: Only USB errors are traced.
|
|
</p>
|
|
<ul>
|
|
<li>
|
|
<code>CONFIG_NSH_USBDEV_TRACEINIT</code>.
|
|
Show initialization events
|
|
</li>
|
|
<li>
|
|
<code>CONFIG_NSH_USBDEV_TRACECLASS</code>.
|
|
Show class driver events
|
|
</li>
|
|
<li>
|
|
<code>CONFIG_NSH_USBDEV_TRACETRANSFERS</code>.
|
|
Show data transfer events
|
|
</li>
|
|
<li>
|
|
<code>CONFIG_NSH_USBDEV_TRACECONTROLLER</code>.
|
|
Show controller events
|
|
<li>
|
|
<code>CONFIG_NSH_USBDEV_TRACEINTERRUPTS</code>.
|
|
Show interrupt-related events.
|
|
</li>
|
|
</ul>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_CONDEV</code></b></td>
|
|
<td>
|
|
If <code>CONFIG_NSH_CONSOLE</code> is set to <i>y</i>, then <code>CONFIG_NSH_CONDEV</code>
|
|
may also be set to select the serial device used to support the NSH console.
|
|
This should be set to the quoted name of a readable/write-able character driver such as:
|
|
<code>CONFIG_NSH_CONDEV="/dev/ttyS1"</code>.
|
|
This is useful, for example, to separate the NSH command line from the system console
|
|
when the system console is used to provide debug output.
|
|
Default: <code>stdin</code> and <code>stdout</code> (probably "<code>/dev/console</code>")
|
|
<ul><small>
|
|
NOTE: When any other device other than <code>/dev/console</code> is used for a user interface,
|
|
(1) linefeeds (<code>\n</code>) will not be expanded to carriage return / linefeeds (<code>\r\n</code>).
|
|
You will need to configure your terminal program to account for this.
|
|
And (2) input is not automatically echoed so you will have to turn local echo on.
|
|
</small></ul>
|
|
</td>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_TELNET</code></b></td>
|
|
<td>
|
|
If <code>CONFIG_NSH_TELNET</code> is set to <i>y</i>, then a TELENET
|
|
server front-end is selected. When this option is provided,
|
|
you may log into NuttX remotely using telnet in order to
|
|
access NSH.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_ARCHINIT</code></b></td>
|
|
<td>
|
|
Set <code>CONFIG_NSH_ARCHINIT</code> if your board provides architecture
|
|
specific initialization via the board-specific function <code>nsh_archinitialize()</code>.
|
|
This function will be called early in NSH initialization to allow board logic to
|
|
do such things as configure MMC/SD slots.
|
|
</td>
|
|
</tr>
|
|
</table></center>
|
|
|
|
<p>
|
|
If Telnet is selected for the NSH console, then we must configure
|
|
the resources used by the Telnet daemon and by the Telnet clients.
|
|
</p>
|
|
|
|
<center><table width="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<th align="left" width="25%">Configuration</th>
|
|
<th align="left">Description</th>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_TELNETD_PORT</code></b></td>
|
|
<td>
|
|
The telnet daemon will listen on this TCP port number for connections. Default: 23
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_TELNETD_DAEMONPRIO</code></b></td>
|
|
<td>
|
|
Priority of the Telnet daemon.
|
|
Default: <code>SCHED_PRIORITY_DEFAULT</code>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_TELNETD_DAEMONSTACKSIZE</code></b></td>
|
|
<td>
|
|
Stack size allocated for the
|
|
Telnet daemon. Default: 2048
|
|
</td>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_TELNETD_CLIENTPRIO</code></b></td>
|
|
<td>
|
|
Priority of the Telnet client.
|
|
Default: <code>SCHED_PRIORITY_DEFAULT</code>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_TELNETD_CLIENTSTACKSIZE</code></b></td>
|
|
<td>
|
|
Stack size allocated for the Telnet client. Default: 2048
|
|
</td>
|
|
</tr>
|
|
</table></center>
|
|
|
|
<p>
|
|
One or both of <code>CONFIG_NSH_CONSOLE</code> and <code>CONFIG_NSH_TELNET</code>
|
|
must be defined. If <code>CONFIG_NSH_TELNET</code> is selected, then there some
|
|
other configuration settings that apply:
|
|
</p>
|
|
|
|
<center><table width="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<th align="left" width="25%">Configuration</th>
|
|
<th align="left">Description</th>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NET=y</code></b></td>
|
|
<td>
|
|
Of course, networking must be enabled.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSOCKET_DESCRIPTORS</code></b></td>
|
|
<td>
|
|
And, of course, you must allocate some socket descriptors.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NET_TCP=y</code></b></td>
|
|
<td>
|
|
TCP/IP support is required for telnet (as well as various other TCP-related configuration settings).
|
|
</td>
|
|
</tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_IOBUFFER_SIZE</code></b></td>
|
|
<td>
|
|
Determines the size of the I/O buffer to use for sending/
|
|
receiving TELNET commands/reponses
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_DHCPC</code></b></td>
|
|
<td>
|
|
Obtain the IP address via DHCP.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_IPADDR</code></b></td>
|
|
<td>
|
|
If <code>CONFIG_NSH_DHCPC</code> is NOT set, then the static IP
|
|
address must be provided.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_DRIPADDR</code></b></td>
|
|
<td>
|
|
Default router IP address
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_NETMASK</code></b></td>
|
|
<td>
|
|
Network mask
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_NOMAC</code></b></td>
|
|
<td>
|
|
Set if your ethernet hardware has no built-in MAC address.
|
|
If set, a bogus MAC will be assigned.
|
|
</td>
|
|
</tr>
|
|
</table></center>
|
|
|
|
<p>
|
|
If you use DHCPC, then some special configuration network options are
|
|
required. These include:
|
|
</p>
|
|
|
|
<center><table width="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<th align="left" width="25%">Configuration</th>
|
|
<th align="left">Description</th>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NET=y</code></b></td>
|
|
<td>
|
|
Of course, networking must be enabled.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSOCKET_DESCRIPTORS</code></b></td>
|
|
<td>
|
|
And, of course, you must allocate some socket descriptors.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NET_UDP=y</code></b></td>
|
|
<td>
|
|
UDP support is required for DHCP (as well as various other UDP-related configuration settings).
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NET_BROADCAST=y</code></b></td>
|
|
<td>
|
|
UDP broadcast support is needed.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NET_BUFSIZE=650</code></b> (or larger)</td>
|
|
<td>
|
|
Per RFC2131 (p. 9), the DHCP client must be prepared to receive DHCP messages of up to
|
|
576 bytes (excluding Ethernet, IP, or UDP headers and FCS).
|
|
</td>
|
|
</tr>
|
|
</table></center>
|
|
|
|
<p>
|
|
If <code>CONFIG_NSH_ROMFSETC</code> is selected, then the following additional
|
|
configuration setting apply:
|
|
</p>
|
|
|
|
<center><table width="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<th align="left" width="25%">Configuration</th>
|
|
<th align="left">Description</th>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_ARCHROMFS</code></b></td>
|
|
<td>
|
|
May be defined to specify an alternative ROMFS image that can be found at <code>configs/<board>/include/nsh_romfsimg.h</code>.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_ROMFSMOUNTPT</code></b></td>
|
|
<td>
|
|
The default mountpoint for the ROMFS volume is <code>"/etc"</code>, but that
|
|
can be changed with this setting. This must be a absolute path
|
|
beginning with '<code>/</code>' and enclosed in quotes.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_INITSCRIPT</code></b></td>
|
|
<td>
|
|
This is the relative path to the startup script within the mountpoint.
|
|
The default is <code>"init.d/rcS"</code>. This is a relative path and must not
|
|
start with '<code>/</code>' but must be enclosed in quotes.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_ROMFSDEVNO</code></b></td>
|
|
<td>
|
|
This is the minor number of the ROMFS block device. The default is
|
|
'<code>0</code>' corresponding to <code>/dev/ram0</code>.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_ROMFSSECTSIZE</code></b></td>
|
|
<td>
|
|
This is the sector size to use with the ROMFS volume. Since the
|
|
default volume is very small, this defaults to 64 but should be
|
|
increased if the ROMFS volume were to be become large. Any value
|
|
selected must be a power of 2.
|
|
</td>
|
|
</tr>
|
|
</table></center>
|
|
|
|
<p>
|
|
When the default <code>rcS</code> file used when <code>CONFIG_NSH_ROMFSETC</code> is
|
|
selected, it will mount a FAT FS under <code>/tmp</code>. The following selections
|
|
describe that FAT FS.
|
|
</p>
|
|
|
|
<center><table width="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<th align="left" width="25%">Configuration</th>
|
|
<th align="left">Description</th>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_FATDEVNO</code></b></td>
|
|
<td>
|
|
This is the minor number of the FAT FS block device. The default is
|
|
'<code>1</code>' corresponding to <code>/dev/ram1</code>.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td valign="top"><b><code>CONFIG_NSH_FATSECTSIZE</code></b></td>
|
|
<td>
|
|
This is the sector size use with the FAT FS. Default is 512.
|
|
</td>
|
|
</tr>
|
|
</table></center>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="customizingnsh"><h1>4.0 Customimizing the NuttShell</h1></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p>
|
|
<b>Overview.</b>
|
|
The NuttShell (NSH) is a simple shell application that may be used with NuttX.
|
|
It supports a variety of commands and is (very) loosely based on the bash shell and the common utilities used in Unix shell programming.
|
|
The paragraphs in this appendix will focus on customizing NSH: Adding new commands, changing the initialization sequence, etc.
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="custonshlib"><h2>4.1 The NSH Library and NSH Initialization</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p>
|
|
<b>Overview.</b>
|
|
NSH is implemented as a library that can be found at <code>apps/nshlib</code>.
|
|
As a library, it can be custom built into any application that follows the NSH initialization sequence described below.
|
|
As an example, the code at <code>apps/examples/nsh/nsh_main.c</code> illustrates how to start NSH and the logic there was intended to be incorporated into your own custom code.
|
|
Although code was generated simply as an example, in the end most people just use this example code as their application <code>main()</code> function.
|
|
That initialization performed by that example is discussed in the following paragraphs.
|
|
</p>
|
|
|
|
<h3>4.1.1 NSH Initialization sequence</h3>
|
|
|
|
<p>
|
|
The NSH start-up sequence is very simple.
|
|
As an example, the code at <code>apps/examples/nsh/nsh_main.c</code> illustrates how to start NSH.
|
|
It simple does the following:
|
|
</p>
|
|
|
|
<ol>
|
|
<li>
|
|
<p>
|
|
If you have C++ static initializers, it will call your implementation of <code>up_cxxinitialize()</code> which will, in turn, call those static initializers.
|
|
For the case of the STM3240G-EVAL board, the implementation of <code>up_cxxinitialize()</code> can be found at <code>nuttx/configs/stm3240g-eval/src/up_cxxinitialize.c</code>.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
This function then calls <code>nsh_initialize()</code> which initializes the NSH library.
|
|
<code>nsh_initialize()</code> is described in more detail below.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
If the Telnetconsole is enabled, it calls <code>nsh_telnetstart()</code> which resides in the NSH library.
|
|
<code>nsh_telnetstart()</code> will start the Telnet daemon that will listen for Telnet connections and start remote NSH sessions.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
If a local console is enabled (probably on a serial port), then <code>nsh_consolemain()</code> is called.
|
|
<code>nsh_consolemain()</code> also resides in the NSH library.
|
|
<code>nsh_consolemain()</code> does not return so that finished the entire NSH initialization sequence.
|
|
</p>
|
|
</ol>
|
|
|
|
<h3>4.1.2 <code>nsh_initialize()</code></h3>
|
|
|
|
<p>
|
|
The NSH initialization function, <code>nsh_initialize()</code>, be found in <code>apps/nshlib/nsh_init.c</code>.
|
|
It does only three things:
|
|
</p>
|
|
|
|
<ol>
|
|
<li>
|
|
<p>
|
|
<code>nsh_romfsetc()</code>:
|
|
If so configured, it executes an NSH start-up script that can be found at <code>/etc/init.d/rcS</code> in the target file system.
|
|
The <code>nsh_romfsetc()</code> function can be found in <code>apps/nshlib/nsh_romfsetc.c</code>.
|
|
This function will (1) register a ROMFS file system, then (2) mount the ROMFS file system.
|
|
<code>/etc</code> is the default location where a read-only, ROMFS file system is mounted by <code>nsh_romfsetc()</code>.
|
|
</p>
|
|
<p>
|
|
The ROMFS image is, itself, just built into the firmware.
|
|
By default, this <code>rcS</code> start-up script contains the following logic:
|
|
</p>
|
|
<ul><pre>
|
|
# Create a RAMDISK and mount it at XXXRDMOUNTPOUNTXXX
|
|
|
|
mkrd -m XXXMKRDMINORXXX -s XXMKRDSECTORSIZEXXX XXMKRDBLOCKSXXX
|
|
mkfatfs /dev/ramXXXMKRDMINORXXX
|
|
mount -t vfat /dev/ramXXXMKRDMINORXXX XXXRDMOUNTPOUNTXXX
|
|
</pre></ul>
|
|
|
|
<p>
|
|
Where the <code>XXXX*XXXX</code> strings get replaced in the template when the ROMFS image is created:
|
|
</p>
|
|
<ul>
|
|
<li>
|
|
<p>
|
|
<code>XXXMKRDMINORXXX</code> will become the RAM device minor number.
|
|
Default: 0
|
|
</p>
|
|
<li>
|
|
<p>
|
|
<code>XXMKRDSECTORSIZEXXX</code> will become the RAM device sector size
|
|
</p>
|
|
<li>
|
|
<p>
|
|
<code>XXMKRDBLOCKSXXX</code> will become the number of sectors in the device.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
<code>XXXRDMOUNTPOUNTXXX</code> will become the configured mount point.
|
|
Default: <code>/etc</code>
|
|
</p>
|
|
</ul>
|
|
<p>
|
|
By default, the substituted values would yield an <code>rcS</code> file like:
|
|
</p>
|
|
<ul><pre>
|
|
# Create a RAMDISK and mount it at /tmp
|
|
|
|
mkrd -m 1 -s 512 1024
|
|
mkfatfs /dev/ram1
|
|
mount -t vfat /dev/ram1 /tmp
|
|
</pre></ul>
|
|
<p>
|
|
This script will, then:
|
|
</p>
|
|
<ul>
|
|
<li>
|
|
<p>
|
|
Create a RAMDISK of size 512*1024 bytes at <code>/dev/ram1</code>,
|
|
</p>
|
|
<li>
|
|
<p>
|
|
Format a FAT file system on the RAM disk at <code>/dev/ram1</code>, and then
|
|
</p>
|
|
<li>
|
|
<p>
|
|
Mount the FAT filesystem at a configured mountpoint, <code>/tmp</code>.
|
|
</p>
|
|
</ul>
|
|
<p>
|
|
This <code>rcS</code> template file can be found at <code>apps/nshlib/rcS.template</code>.
|
|
The resulting ROMFS file system can be found in <code>apps/nshlib/nsh_romfsimg.h</code>.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
<code>nsh_archinitialize()</code>:
|
|
Next any architecture-specific NSH initialization will be performed (if any).
|
|
For the STM3240G-EVAL, this architecture specific initialization can be found at <code>configs/stm3240g-eval/src/up_nsh.c</code>.
|
|
This it does things like: (1) Initialize SPI devices, (2) Initialize SDIO, and (3) mount any SD cards that may be inserted.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
<code>nsh_netinit()</code>:
|
|
The <code>nsh_netinit()</code> function can be found in <code>apps/nshlib/nsh_netinit.c</code>.
|
|
</p>
|
|
</ol>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="custoncmds"><h2>4.2 NSH Commands</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p>
|
|
<b>Overview.</b>
|
|
NSH supports a variety of commands as part of the NSH program.
|
|
All of the NSH commands are listed in the NSH documentation <a href="#cmdoverview">above</a>.
|
|
Not all of these commands may be available at any time, however.
|
|
Many commands depend upon certain NuttX configuration options.
|
|
You can enter the help command at the NSH prompt to see the commands actual available:
|
|
</p>
|
|
<ul><pre>
|
|
nsh> help
|
|
</pre></ul>
|
|
<p>
|
|
For example, if network support is disabled, then all network-related commands will be missing from the list of commands presented by '<code>nsh> help</code>'.
|
|
You can see the specific command dependencies in the table <a href="#cmddependencies">above</a>.
|
|
</p>
|
|
|
|
<h3>4.2.1 Adding New NSH Commands</h3>
|
|
|
|
<p>
|
|
New commands can be added to the NSH very easily.
|
|
You simply need to add two things:
|
|
</p>
|
|
<ol>
|
|
<li>
|
|
<p>
|
|
The implementation of your command, and
|
|
</p>
|
|
<li>
|
|
<p>
|
|
A new entry in the NSH command table
|
|
</p>
|
|
</ol>
|
|
|
|
<p>
|
|
<b>Implementation of Your Command.</b>
|
|
For example, if you want to add a new a new command called <code>mycmd</code> to NSH, you would first implement the <code>mycmd</code> code in a function with this prototype:
|
|
</p>
|
|
|
|
<ul></pre>
|
|
int cmd_mycmd(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
|
|
</pre></ul>
|
|
|
|
<p>
|
|
The <code>argc</code> and <code>argv</code> are used to pass command line arguments to the NSH command.
|
|
Command line parameters are passed in a very standard way: <code>argv[0]</code> will be the name of the command, and <code>argv[1]</code> through <code>argv[argc-1]</code> are the additional arguments provided on the NSH command line.
|
|
</p>
|
|
<p>
|
|
The first parameter, <code>vtbl</code>, is special.
|
|
This is a pointer to session-specific state information.
|
|
You don't need to know the contents of the state information, but you do need to pass this <code>vtbl</code> argument when you interact with the NSH logic.
|
|
The only use you will need to make of the <code>vtbl</code> argument will be for outputting data to the console.
|
|
You don't use <code>printf()</code> within NSH commands.
|
|
Instead you would use:
|
|
</p>
|
|
<ul><pre>
|
|
void nsh_output(FAR struct nsh_vtbl_s *vtbl, const char *fmt, …);
|
|
</pre></ul>
|
|
<p>
|
|
So if you only wanted to output "Hello, World!" on the console, then your whole command implementation might be:
|
|
</p>
|
|
<ul><pre>
|
|
int cmd_mycmd(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
|
|
{
|
|
nsh_output(vtbl, "e;Hello, World!"e;);
|
|
return 0;
|
|
}
|
|
</pre></ul>
|
|
<p>
|
|
The prototype for the new command should be placed in <code>apps/examples/nshlib/nsh.h></code>.
|
|
</p>
|
|
|
|
<p>
|
|
<b>Adding You Command to the NSH Command Table</b>.
|
|
All of the commands support by NSH appear in a single table called:
|
|
</p>
|
|
<ul><pre>
|
|
const struct cmdmap_s g_cmdmap[]
|
|
</pre></ul>
|
|
<p>
|
|
That table can be found in the file <code>apps/examples/nshlib/nsh_parse.c</code>.
|
|
The structure <code>cmdmap_s</code> is also defined in <code>apps/nshlib/nsh_parse.c</code>:
|
|
</p>
|
|
<ul><pre>
|
|
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 */
|
|
};
|
|
</pre></ul>
|
|
<p>
|
|
This structure provides everything that you need to describe your command:
|
|
Its name (<code>cmd</code>), the function that handles the command (<code>cmd_mycmd()</code>), the minimum and maximum number of arguments needed by the command,
|
|
and a string describing the command line arguments.
|
|
That last string is what is printed when enter "<code>nsh> help</code>".
|
|
</p>
|
|
<p>
|
|
So, for you sample commnd, you would add the following the to the <code>g_cmdmap[]</code> table:
|
|
</p>
|
|
<ul><pre>
|
|
{ "mycmd", cmd_mycmd, 1, 1, NULL },
|
|
</pre></ul>
|
|
|
|
<p>
|
|
This entry is particularly simply because <code>mycmd</code> is so simple.
|
|
Look at the other commands in <code>g_cmdmap[]</code> for more complex examples.
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="custapps"><h2>4.3 NSH "Built-In" Applications</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p>
|
|
<b>Overview.</b>
|
|
In addition to these commands that are a part of NSH, external programs can also be executed as NSH commands.
|
|
These external programs are called "Built-In" Applications for historic reasons.
|
|
That terminology is somewhat confusing because the actual NSH commands as described above are truly "built-into" NSH whereas these applications are really external to NuttX.
|
|
</p>
|
|
<p>
|
|
These applications are built-into NSH in the sense that they can be executed by simply typing the name of the application at the NSH prompt.
|
|
Built-in application support is enabled with the configuration option <code>CONFIG_NSH_BUILTIN_APPS</code>.
|
|
When this configuration option is set, you will also be able to see the built-in applications if you enter "nsh> help".
|
|
They will appear at the bottom of the list of NSH commands under:
|
|
</p>
|
|
|
|
<ul><pre>
|
|
Builtin Apps:
|
|
</pre></ul>
|
|
<p>
|
|
Note that no detailed help information beyond the name of the built-in application is provided.
|
|
</p>
|
|
|
|
<h3>4.3.1 Named Applications</h3>
|
|
|
|
<p>
|
|
<b>Overview.</b>
|
|
The underlying logic that supports the NSH built-in applications is called "Named Applications".
|
|
The named application logic can be found at <code>apps/namedapp</code>.
|
|
This logic simply does the following:
|
|
</p>
|
|
|
|
<ol>
|
|
<li>
|
|
<p>
|
|
It supports registration mechanism so that named applications can dynamically register themselves at build time, and
|
|
</p>
|
|
<li>
|
|
<p>
|
|
Utility functions to look up, list, and execute the named applications.
|
|
</p>
|
|
</ol>
|
|
|
|
<p>
|
|
<b>Named Application Utility Functions</b>.
|
|
The utility functions exported by the named application logic are prototyped in <code>apps/include/apps.h</code>.
|
|
These utility functions include:
|
|
</p>
|
|
|
|
<ul>
|
|
<li>
|
|
<p>
|
|
<code>int namedapp_isavail(FAR const char *appname);</code>
|
|
Checks for availability of application registered as <code>appname</code> during build time.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
<code>const char *namedapp_getname(int index);</code>
|
|
Returns a pointer to a name of built-in application pointed by the <code>index</code>.
|
|
This is the utility function that is used by NSH in order to list the available built-in applications when "<code>nsh> help</code>" is entered.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
<code>int exec_namedapp(FAR const char *appname, FAR const char **argv);</code>
|
|
Executes built-in named application registered during compile time.
|
|
This is the utility function used by NSH to execute the built-in application.
|
|
</p>
|
|
</ul>
|
|
|
|
<p>
|
|
<b>Autogenerated Header Files</b>.
|
|
Application entry points with their requirements are gathered together in two files when NuttX is first built:
|
|
</p>
|
|
<ol>
|
|
<li>
|
|
<p>
|
|
<code>apps/namedapp/namedapp_proto.h</code>:
|
|
Prototypes of application task entry points.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
<code>apps/namedapp/namedapp_list.h</code>:
|
|
Application specific information and start-up requirements
|
|
</p>
|
|
</ol>
|
|
|
|
<p>
|
|
<b>Registration of Named Applications</b>.
|
|
The NuttX build occurs in several phases as different build targets are executed:
|
|
(1) <i>context</i> when the configuration is established,
|
|
(2) <i>depend </i>when target dependencies are generated, and
|
|
(3) <i>default</i> (<code>all</code>) when the normal compilation and link operations are performed.
|
|
Named application information is collected during the make <i>context</i> build phase.
|
|
</p>
|
|
|
|
<p>
|
|
An example application that can be "built-in" is be found in the <code>apps/examples/hello directory</code>.
|
|
Let's walk through this specific cause to illustrate the general way that built-in applications are created and how they register themselves so that they can be used from NSH.
|
|
</p>
|
|
|
|
<p>
|
|
<code><b>apps/examples/hello</code></b>.
|
|
The main routine for apps/examples/hello can be found in <code>apps/examples/hello/main.c</code>.
|
|
The main routine is:
|
|
</p>
|
|
<ul><pre>
|
|
int hello_main(int argc, char *argv[])
|
|
{
|
|
printf("Hello, World!!\n");
|
|
return 0;
|
|
}
|
|
</pre></ul>
|
|
|
|
<p>
|
|
This is the built in function that will be registered during the <i>context</i> build phase of the NuttX build.
|
|
That registration is performed by logic in <code>apps/examples/hello/Makefile</code>.
|
|
But the build system gets to that logic through a rather tortuous path:
|
|
</p>
|
|
|
|
<ol>
|
|
<li>
|
|
<p>
|
|
The top-level context make target is in <code>nuttx/Makefile</code>.
|
|
All build targets depend upon the <i>context</i> build target.
|
|
For the <code>apps/</code> directory, this build target will execute the <i>context</i> target in the <code>apps/Makefile</code>.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
The <code>apps/Makefile</code> will, in turn, execute the <i>context</i> targets in all of the configured sub-directories.
|
|
In our case will include the <code>Makefile</code> in <code>apps/examples</code>.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
And finally, the <code>apps/examples/Makefile</code>will execute the <i>context</i> target in all configured <code>example</code>sub-directores, getting us finally to <code>apps/examples/Makefile</code> (which is covered below).</p>
|
|
<li>
|
|
<p>
|
|
At the conclusion of the <i>context</i> phase, the <code> apps/Makefile</code> will touch a file called <code>.context</code> in the <code>apps/</code> directory, preventing any further configurations during any subsequent <i>context</i> phase build attempts.
|
|
</p>
|
|
</ol>
|
|
|
|
<p>
|
|
<b>NOTE</b>:
|
|
Since this context build phase can only be executed one time, any subsequent configuration changes that you make will, then, not be reflected in the build sequence.
|
|
That is a common area of confusion.
|
|
Before you can instantiate the new configuration, you have to first get rid of the old configuration.
|
|
The most drastic way to this is:
|
|
</p>
|
|
<ul><pre>
|
|
make distclean
|
|
</pre></ul>
|
|
<p>
|
|
But then you will have to re-configuration NuttX from scratch.
|
|
But if you only want to re-build the configuration in the <code>apps/</code> sub-directory, then there is a less labor-intensive way to do that.
|
|
The following NuttX make command will remove the configuration only from the <code>apps/</code> directory and will let you continue without re-configuring everything:
|
|
</p>
|
|
<ul><pre>
|
|
make apps_distclean
|
|
</pre></ul>
|
|
|
|
<p>
|
|
Logic for the <code>context</code> target in <code>apps/examples/hello/Makefile</code> registers the <code>hello_main()</code> application in the <code>namedapp</code>'s <code>namedapp_proto.h</code>and <code>namedapp_list.h</code> files.
|
|
That logic that does that in <code>apps/examples/hello/Makefile</code> is abstracted below:
|
|
</p>
|
|
<ol>
|
|
<li>
|
|
<p>
|
|
First, the <code>Makefile</code> includes <code>apps/Make.defs</code>:
|
|
</p>
|
|
<ul><pre>
|
|
include $(APPDIR)/Make.defs
|
|
</pre></ul>
|
|
<p>
|
|
This defines a macro called <code>REGISTER</code> that adds data to the <i>namedapp</i> header files:
|
|
</p>
|
|
<ul><pre>
|
|
define REGISTER
|
|
@echo "Register: $1"
|
|
@echo "{ \"$1\", $2, $3, $4 }," >> "$(APPDIR)/namedapp/namedapp_list.h"
|
|
@echo "EXTERN int $4(int argc, char *argv[]);" >> "$(APPDIR)/namedapp/namedapp_proto.h"
|
|
endef
|
|
</pre></ul>
|
|
<p>
|
|
When this macro runs, you will see the output in the build "<code>Register: hello</code>", that is a sure sign that the registration was successful.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
The make file then defines the application name (<code>hello</code>), the task priority (default), and the stack size that will be allocated in the task runs (2K).
|
|
</p>
|
|
<ul><pre>
|
|
APPNAME = hello
|
|
PRIORITY = SCHED_PRIORITY_DEFAULT
|
|
STACKSIZE = 2048
|
|
</pre></ul>
|
|
|
|
<li>
|
|
<p>
|
|
And finally, the <code>Makefile</code> invokes the <code>REGISTER</code> macro to added the <code>hello_main()</code> named application.
|
|
Then, when the system build completes, the <code>hello</code> command can be executed from the NSH command line.
|
|
When the <code>hello</code> command is executed, it will start the task with entry point <code>hello_main()</code> with the default priority and with a stack size of 2K.
|
|
</p>
|
|
<ul><pre>
|
|
.context:
|
|
$(call REGISTER,$(APPNAME),$(PRIORITY),$(STACKSIZE),$(APPNAME)_main)
|
|
@touch $@
|
|
</pre></ul>
|
|
</ol>
|
|
|
|
<p>
|
|
<b>Other Uses of Named Application.</b>
|
|
The primary purpose of named applications is to support command line execution of applications from NSH.
|
|
However, there are two other uses of named applications that should be mentioned.
|
|
</p>
|
|
|
|
<ol>
|
|
<li>
|
|
<p>
|
|
<b>Named Application Start-Up <code>main()</code> function</b>.
|
|
A named application can even be used as the main, start-up entry point into your embedded software.
|
|
When the user defines this option in the NuttX configuration file:
|
|
</p>
|
|
<ul><pre>
|
|
CONFIG_BUILTIN_APP_START=<application name>
|
|
</pre></ul>
|
|
<p>
|
|
that application will be invoked immediately after system starts instead of the default <code>CONFIG_USER_ENTRYPOINT</code>() entry point.
|
|
Note that <code><application name></code> must be provided just as it would have been on the NSH command line.
|
|
For example, <code>hello</code> would result in <code>hello_main()</code> being started at power-up.
|
|
</p>
|
|
<p>
|
|
This option might be useful in some develop environments where you use NSH only during the debug phase, but want to eliminate NSH in the final product.
|
|
Setting <code>CONFIG_BUILTIN_APP_START</code> in this way will bypass NSH and execute your application just as if it were entered from the NSH command line.
|
|
</p>
|
|
|
|
<li>
|
|
<p><b><i>binfs</i></b>.
|
|
<i>binfs</i> is a tiny file system located at <code>apps/namedapp/binfs.c</code>.
|
|
This provides an alternative what of visualizing installed named applications.
|
|
Without <i>binfs</i>, you can see the installed named applications using the NSH help command.
|
|
<i>binfs</i> will create a tiny pseudo-file system mounted at <code>/bin</code>.
|
|
Using <i>binfs</i>, you can see the available named applications by listing the contents of <code>/bin</code> directory.
|
|
This gives some superficial Unix compatibility, but does not really add any new functionality.
|
|
</p>
|
|
</ol>
|
|
|
|
<h3>4.3.2 Synchronous Built-In Applications</h3>
|
|
|
|
<p>
|
|
By default, built-in commands started from the NSH command line will run asynchronously with NSH.
|
|
If you want to force NSH to execute commands then wait for the command to execute, you can enable that feature by adding the following to the NuttX configuration file:
|
|
</p>
|
|
<ul><pre>
|
|
CONFIG_SCHED_WAITPID=y
|
|
</pre></ul>
|
|
<p>
|
|
This configuration option enables support for the standard <code>waitpid()</code> RTOS interface.
|
|
When that interface is enabled, NSH will use it to wait, sleeping until the built-in application executes to completion.
|
|
</p>
|
|
<p>
|
|
Of course, even with <code>CONFIG_SCHED_WAITPID=y</code> defined, specific applications can still be forced to run asynchronously by adding the ampersand (&) after the NSH command.
|
|
</p>
|
|
|
|
<h3>4.3.3 Application Configuration File</h3>
|
|
|
|
<p>
|
|
<b>The appconfig File</b>.
|
|
A special configuration file is used to configure which applications are to be included in the build.
|
|
The source for this file is saved at <code>configs/<board>/<configuration>/appconfig</code>.
|
|
The existence of the <code>appconfig</code> file in the board configuration directory is sufficient to enable building of applications.
|
|
</p>
|
|
|
|
<p>
|
|
The <code>appconfig</code> file is copied into the <code>apps/</code> directory as <code>.config</code> when NuttX is configured.
|
|
<code>.config</code> is included by the top-level <code>apps/Makefile</code>.
|
|
As a minimum, this configuration file must define files to add to the <code>CONFIGURED_APPS</code> list like:
|
|
</p>
|
|
<ul><pre>
|
|
CONFIGURED_APPS += examples/hello
|
|
</pre></ul>
|
|
|
|
<p>
|
|
<b>Changes in the Works</b>.
|
|
There are changes in the works that will obsolete the <code>appconfig</code> file.
|
|
These changes will implement an automated configuration system for NuttX.
|
|
One consequence of this new configuration system is that the <code>appconfig</code> file will become obsolete and will be replaced by a new mechanism for selecting applications.
|
|
This new mechanism is not yet available, but is dicussed here: <a href="http://tech.groups.yahoo.com/group/nuttx/message/1604">http://tech.groups.yahoo.com/group/nuttx/message/1604</a>.
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="custinit"><h2>4.4 Customizing NSH Initialization</h2></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<p>
|
|
<b>Ways to Customize NSH Initialization</b>.
|
|
There are three ways to customize the NSH start-up behavior.
|
|
Here they are presented in order of increasing difficulty:
|
|
</p>
|
|
|
|
<ol>
|
|
<li>
|
|
<p>
|
|
You can extend the initialization logic in <code>configs/stm3240g-eval/src/up_nsh.c</code>.
|
|
The logic there is called each time that NSH is started and is good place in particular for any device-related initialization.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
You replace the sample code at <code>apps/examples/nsh/nsh_main.c</code> with whatever start-up logic that you want.
|
|
NSH is a library at <code>apps/nshlib</code>.
|
|
<code>apps.examplex/nsh</code> is just a tiny, example start-up function (<code>CONFIG_USER_ENTRYPOINT</code>()) that that runs immediately and illustrates how to start NSH
|
|
If you want something else to run immediately then you can write your write your own custom <code>CONFIG_USER_ENTRYPOINT</code>() function and then start other tasks from your custom <code>CONFIG_USER_ENTRYPOINT</code>().
|
|
</p>
|
|
<li>
|
|
<p>
|
|
NSH also supports a start-up script that executed when NSH first runs.
|
|
This mechanism has the advantage that the start-up script can contain any NSH commands and so can do a lot of work with very little coding.
|
|
The disadvantage is that is is considerably more complex to create the start-up script.
|
|
It is sufficiently complex that is deserves its own paragraph
|
|
</p>
|
|
</ol>
|
|
|
|
<h3>4.4.1 NuttShell Start up Scripts</h3>
|
|
|
|
<p>
|
|
First of all you should look at <a href="#startupscript">NSH Start-Up Script</a> paragraph.
|
|
Most everything you need to know can be found there.
|
|
That information will be repeated and extended here for completeness.
|
|
</p>
|
|
|
|
<p>
|
|
<b>NSH Start-Up Script</b>.
|
|
NSH supports options to provide a start up script for NSH.
|
|
The start-up script contains any command support by NSH (i.e., that you see when you enter 'nsh> help').
|
|
In general this capability is enabled with <code>CONFIG_NSH_ROMFSETC=y</code>, but has several other related configuration options as described with the <a href="#nshconfiguration">NSH-specific configuration settings</a> paragraph.
|
|
This capability also depends on:
|
|
</p>
|
|
|
|
<ul>
|
|
<li>
|
|
<p>
|
|
<code>CONFIG_DISABLE_MOUNTPOINT=n</code>.
|
|
If mount point support is disabled, then you cannot mount <i>any</i> file systems.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
<code>CONFIG_NFILE_DESCRIPTORS > 4</code>.
|
|
Of course you have to have file descriptions to use any thing in the file system.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
<code>CONFIG_FS_ROMFS</code> enabled.
|
|
This option enables ROMFS file system support.
|
|
</p>
|
|
</ul>
|
|
|
|
<p>
|
|
<b>Default Start-Up Behavior</b>.
|
|
The implementation that is provided is intended to provide great flexibility for the use of Start-Up files.
|
|
This paragraph will discuss the general behavior when all of the configuration options are set to the default values.
|
|
</p>
|
|
<p>
|
|
In this default case, enabling <code>CONFIG_NSH_ROMFSETC</code> will cause NSH to behave as follows at NSH start-up time:
|
|
</p>
|
|
<ul>
|
|
<li>
|
|
<p>
|
|
NSH will create a read-only RAM disk (a ROM disk), containing a tiny ROMFS filesystem containing the following:
|
|
</p>
|
|
<ul><pre>
|
|
`--init.d/
|
|
`-- rcS
|
|
</pre></ul>
|
|
<p>
|
|
Where <code>rcS</code> is the NSH start-up script.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
NSH will then mount the ROMFS filesystem at <code>/etc</code>, resulting in:
|
|
</p>
|
|
<ul><pre>
|
|
|--dev/
|
|
| `-- ram0
|
|
`--etc/
|
|
`--init.d/
|
|
`-- rcS</PRE>
|
|
</pre></ul>
|
|
<li>
|
|
<p>
|
|
By default, the contents of <code>rcS</code> script are:
|
|
</p>
|
|
<ul><pre>
|
|
# Create a RAMDISK and mount it at /tmp
|
|
|
|
mkrd -m 1 -s 512 1024
|
|
mkfatfs /dev/ram1
|
|
mount -t vfat /dev/ram1 /tmp
|
|
</pre></ul>
|
|
<li>
|
|
<p>
|
|
NSH will execute the script at <code>/etc/init.d/rcS</code> at start-up (before the first NSH prompt).
|
|
After execution of the script, the root FS will look like:
|
|
</p>
|
|
<ul><pre>
|
|
|--dev/
|
|
| |-- ram0
|
|
| `-- ram1
|
|
|--etc/
|
|
| `--init.d/
|
|
| `-- rcS
|
|
`--tmp/
|
|
</pre></ul>
|
|
</ul>
|
|
|
|
<p>
|
|
<b>Example Configurations</b>.
|
|
Here are some configurations that have <code>CONFIG_NSH_ROMFSETC=y</code> in the NuttX configuration file.
|
|
They might provide useful examples:
|
|
</p>
|
|
<ul>
|
|
<code>configs/hymini-stm32v/nsh2<br>
|
|
configs/ntosd-dm320/nsh<br>
|
|
configs/sim/nsh<br>
|
|
configs/sim/nsh2<br>
|
|
configs/sim/nx<br>
|
|
configs/sim/nx11<br>
|
|
configs/sim/touchscreen<br>
|
|
configs/vsn/nsh</code>
|
|
</ul>
|
|
<p>
|
|
In most of these cases, the configuration sets up the <i>default</i> <code>/etc/init.d/rcS</code> script.
|
|
The default script is here: <code>apps/nshlib/rcS.template</code>.
|
|
(The funny values in the template like <code>XXXMKRDMINORXXX</code> get replaced via <code>sed</code> at build time).
|
|
This default configuration creates a ramdisk and mounts it at <code>/tmp</code> as discussed above.
|
|
</p>
|
|
<p>
|
|
If that default behavior is not what you want, then you can provide your own custom <code>rcS</code> script by defining <code>CONFIG_NSH_ARCHROMFS=y</code> in the configuration file.
|
|
The only example that uses a custom /<code>etc/init.d/rcS</code> file in the NuttX source tree is this one: <code>configs/vsn/nsh</code>.
|
|
The <code>configs/vsn/nsh/defconfig</code> file also has this definition:
|
|
</p>
|
|
<ul><code>CONFIG_NSH_ARCHROMFS=y</code> -- Support an architecture specific ROMFS file.</ul>
|
|
|
|
<p>
|
|
<b>Modifying the ROMFS Image</b>.
|
|
The contents of the <code>/etc</code> directory are retained in the file <code>apps/nshlib/nsh_romfsimg.h</code> OR, if <code>CONFIG_NSH_ARCHROMFS</code> is defined, <code>include/arch/board/rcs.template</code>.
|
|
In order to modify the start-up behavior, there are three things to study:
|
|
</p>
|
|
|
|
<ol>
|
|
<li>
|
|
<p>
|
|
<b>Configuration Options.</b>
|
|
The additional <code>CONFIG_NSH_ROMFSETC</code> configuration options discussed with the other <a href="#nshconfiguration">NSH-specific configuration settings</a>.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
<b><code>tools/mkromfsimg.sh</code> Script</b>.
|
|
The script <code>tools/mkromfsimg.sh</code> creates <code>nsh_romfsimg.h</code>.
|
|
It is not automatically executed.
|
|
If you want to change the configuration settings associated with creating and mounting the <code>/tmp</code> directory, then it will be necessary to re-generate this header file using the <code>tools/mkromfsimg.sh</code> script.
|
|
</p>
|
|
<p>
|
|
The behavior of this script depends upon several things:
|
|
</p>
|
|
<ol>
|
|
<li>
|
|
<p>
|
|
The configuration settings then installed configuration.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
The <code>genromfs</code> tool(available from <a href="http://romfs.sourceforge.net/">http://romfs.sourceforge.net</a>) or included within the NuttX buildroot toolchain.
|
|
There is a snapshot here: <code>misc/tools/genromfs-0.5.2.tar.gz</code>.
|
|
</p>
|
|
<li>
|
|
<p>
|
|
The <code>xxd</code> tool that is used to generate the C header files (xxd is a normal part of a complete Linux or Cygwin installation, usually as part of the <code>vi</code> package).
|
|
</p>
|
|
<li>
|
|
<p>
|
|
The file <code>apps/nshlib/rcS.template</code> (OR, if <code>CONFIG_NSH_ARCHROMFS</code> is defined <code>include/arch/board/rcs.template</code>.
|
|
</p>
|
|
</ol>
|
|
<li>
|
|
<p>
|
|
<code><b>rcS.template</b></code>.
|
|
The file <code>apps/nshlib/rcS.template</code> contains the general form of the <code>rcS</code> file; configured values are plugged into this template file to produce the final <code>rcS</code> file.
|
|
</p>
|
|
</ol>
|
|
|
|
<p>
|
|
<b><code>rcS.template</code></b>.
|
|
The default <code>rcS.template</code>, </code><code>apps/nshlib/rcS.template</code>, generates the standard, default <code>apps/nshlib/nsh_romfsimg.h</code> file.
|
|
</p>
|
|
|
|
<p>
|
|
If <code>CONFIG_NSH_ARCHROMFS</code> is defined in the NuttX configuration file, then a custom, board-specific <code>nsh_romfsimg.h</code> file residing in <code>configs/<board>/include</code>will be used.
|
|
NOTE when the OS is configured, <code>include/arch/board</code> will be linked to <code>configs/<board>/include</code>.
|
|
</p>
|
|
|
|
<p>
|
|
As mention above, the only example that uses a custom <code>/etc/init.d/rcS</code> file in the NuttX source tree is this one: <code>configs/vsn/nsh</code>.
|
|
The custom script for the <code>configs/vsn</code> case is located at <code>configs/vsn/include/rcS.template</code>.
|
|
</p>
|
|
|
|
<p>
|
|
All of the startup-behavior is contained in <code>rcS.template</code>.
|
|
The role of <code>mkromfsimg.sh</code> script is to (1) apply the specific configuration settings to <code>rcS.template</code> to create the final <code>rcS</code>, and (2) to generate the header file <code>nsh_romfsimg.h</code> containg the ROMFS file system image.
|
|
To do this, <code>mkromfsimg.sh</code> uses two tools that must be installed in your system:
|
|
</p>
|
|
<ol>
|
|
<li>
|
|
<p>
|
|
The <code>genromfs</code> tool that is used to generate the ROMFS file system image.</code>
|
|
</p>
|
|
<li>
|
|
<p>
|
|
The <code>xxd</code> tool that is used to create the C header file.
|
|
</p>
|
|
</ol>
|
|
<p>
|
|
You can find the generated ROMFS file system for the <code>configs/vsn</code> case here: <code>configs/vsn/include/rcS.template</code>
|
|
</p>
|
|
|
|
<table width ="100%">
|
|
<tr bgcolor="#e4e4e4">
|
|
<td>
|
|
<a name="index"><h1>Index</h1></a>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<table width="100%">
|
|
<tr><td width="50%">
|
|
<ul>
|
|
<li><a href="#builtinvars"><code>$?</code></a></li>
|
|
<li><a href="#cmdtest"><code>[</code></a></li>
|
|
<li><a href="#custoncmds">Adding NSH commands<</a></li>
|
|
<li><a href="#custapps"><code>appconfig</code></a></li>
|
|
<li><a href="#custapps">Application configuration file (<code>appconfig</code>)</a></li>
|
|
<li><a href="#custapps">Autogenerated header files</a></li>
|
|
<li><a href="#cmdoverview">Background commands</a></li>
|
|
<li><a href="#cmdoverview">Background command priority</a></li>
|
|
<li><a href="#custapps"><code>binfs</code></a></li>
|
|
<li><a href="#custapps">Built-In applications</a></li>
|
|
<li><a href="#builtinvars">Built-in variables</a></li>
|
|
<li><a href="#cmdcat"><code>cat</code></a></li>
|
|
<li><a href="#cmdcd"><code>cd</code></a></li>
|
|
<li><a href="#commands">Command summaries</a></li>
|
|
<li><a href="#custoncmds">Command table</a></li>
|
|
<li><a href="#conditional">Conditional command execution</a></li>
|
|
<li><a href="#custapps"><code>CONFIG_BUILTIN_APP_START</code></a></li>
|
|
<li><a href="#custinit"><code>CONFIG_DISABLE_MOUNTPOINT</code></a></li>
|
|
<li><a href="#custinit"><code>CONFIG_FS_ROMFS</code></a></li>
|
|
<li><a href="#custinit"><code>CONFIG_NFILE_DESCRIPTORS</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_ARCHINIT</code></a></li>
|
|
<li><a href="#custinit"><code>CONFIG_NSH_ARCHROMFS</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_BUILTIN_APPS</code></a></li>
|
|
<li><a href="#custapps"><code>CONFIG_NSH_BUILTIN_APPS</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_CONSOLE</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_DHCPC</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_DISABLEBG</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_DISABLESCRIPT</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_DRIPADDR</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_FATDEVNO</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_FATMOUNTPT</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_FATNSECTORS</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_FATSECTSIZE</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_FILEIOSIZE</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_INITSCRIPT</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_IOBUFFER_SIZE</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_IPADDR</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_LINELEN</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_NESTDEPTH</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_NETMASK</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_NOMAC</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_ROMFSDEVNO</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_ROMFSETC</code></a></li>
|
|
<li><a href="#custinit"><code>CONFIG_NSH_ROMFSETC</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_ARCHROMFS</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_ROMFSMOUNTPT</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_ROMFSSECTSIZE</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_STRERROR</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_TELNET</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_USBCONDEV</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_USBCONSOLE</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_UBSDEV_MINOR</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_USBDEV_TRACECLASS</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_USBDEV_TRACECONTROLLER</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_USBDEV_TRACEINIT</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_USBDEV_TRACEINTERRUPTS</code></a></li>
|
|
<li><a href="#nshconfiguration"><code>CONFIG_NSH_USBDEV_TRACETRANSFERS</code></a></li>
|
|
<li><a href="#custapps"><code>CONFIG_SCHED_WAITPID</code></a></li>
|
|
<li><a href="#custapps"><code>CONFIGURED_APPS</code></a></li>
|
|
<li><a href="#configuration">Configuration settings</a></li>
|
|
<li><a href="#cmddependencies">Configuration settings, command dependencies</a></li>
|
|
<li><a href="#nshconfiguration">Configuration settings, NSH-specific</a></li>
|
|
<li><a href="#cmdcp"><code>cp</code></a></li>
|
|
<li><a href="#currentwd">Current working directory</a></li>
|
|
<li><a href="#customizingnsh">Customizing NSH</a></li>
|
|
<li><a href="#custinit">Customizing NSH initialization</a></li>
|
|
<li><a href="#cmddate"><code>date</code></a></li>
|
|
<li><a href="#cmddd"><code>dd</code></a></li>
|
|
<li><a href="#cmddf"><code>df</code></a></li>
|
|
<li><a href="#cmdecho"><code>echo</code></a></li>
|
|
<li><a href="#environvars">Environment Variables</a></li>
|
|
<li><a href="#startupscript"><code>/etc/init.d/rcS</code></a>
|
|
<li><a href="#cmdexec"><code>exec</code></a></li>
|
|
<li><a href="#custapps"><code>exec_namedapp()</code></a></li>
|
|
</ul></td>
|
|
<td></ul>
|
|
<li><a href="#cmdexit"><code>exit</code></a></li>
|
|
<li><a href="#cmdfree"><code>free</code></a></li>
|
|
<li><a href="#custoncmds"><code>g_cmdmap</code></a></li>
|
|
<li><a href="#custinit"><code>genromfs</code></a></li>
|
|
<li><a href="#cmdget"><code>get</code></a></li>
|
|
<li><a href="#frontend">Greeting</a></li>
|
|
<li><a href="#cmdhelp"><code>help</code></a></li>
|
|
<li><a href="#conditional"><code>if-then[-else]-fi</code></a></li>
|
|
<li><a href="#cmdifconfig"><code>ifconfig</code></a></li>
|
|
<li><a href="#custonshlib">Initialization sequence</a></li>
|
|
<li><a href="#cmdkill"><code>kill</code></a></li>
|
|
<li><a href="#cmdlosetup"><code>losetup</code></a></li>
|
|
<li><a href="#cmdls">ls</code></a></li>
|
|
<li><a href="#cmdmbhw"><code>mb</code></a></li>
|
|
<li><a href="#cmdmbhw"><code>mh</code></a></li>
|
|
<li><a href="#cmdmbhw"><code>mw</code></a></li>
|
|
<li><a href="#cmdmkdir"><code>mkdir</code></a></li>
|
|
<li><a href="#cmdmkfatfs"><code>mkfatfs</code></a></li>
|
|
<li><a href="#cmdmkfifo"><code>mkfifo</code></a></li>
|
|
<li><a href="#cmdmkrd"><code>mkrd</code></a></li>
|
|
<li><a href="#custinit"><code>mkromfsimg.sh</code></a></li>
|
|
<li><a href="#cmdmount"><code>mount</code></a></li>
|
|
<li><a href="#cmdmv"><code>mv</code></a></li>
|
|
<li><a href="#custapps">Named application start-up <code>main()</code></a></li>
|
|
<li><a href="#custapps">Named applications</a></li>
|
|
<li><a href="#custapps"><code>namedapp_getname()</code></a></li>
|
|
<li><a href="#custapps"><code>namedapp_isavail()</code></a></li>
|
|
<li><a href="#custapps"><code>namedapp_list.h</code></a></li>
|
|
<li><a href="#custapps"><code>namedapp_proto.h</code></a></li>
|
|
<li><a href="#cmdnfsmount"><code>nfsmount</code></a></li>
|
|
<li><a href="#cmdoverview"><code>nice</code></a></li>
|
|
<li><a href="#custonshlib">NSH library (<code>nshlib</code>)</a></li>
|
|
<li><a href="#custonshlib"><code>nsh_archinitialize()</code></a></li>
|
|
<li><a href="#custonshlib"><code>nsh_consolemain()</code></a></li>
|
|
<li><a href="#custonshlib"><code>nsh_initialize()</code></a></li>
|
|
<li><a href="#custonshlib"><code>nsh_main()</code></a></li>
|
|
<li><a href="#custinit"><code>nsh_main.c</code></a></li>
|
|
<li><a href="#custonshlib"><code>nsh_netinit()</code></a></li>
|
|
<li><a href="#custoncmds"><code>nsh_output()</code></a></li>
|
|
<li><a href="#custonshlib"><code>nsh_romfsetc()</code></a></li>
|
|
<li><a href="#custonshlib"><code>nsh_telnetstart()</code></a></li>
|
|
<li><a href="#custonshlib"><code>nshlib</code></a></li>
|
|
<li><a href="#environvars"><code>OLDPWD</code></a></li>
|
|
<li><a href="#overview">Overview</a></li>
|
|
<li><a href="#cmdping"><code>ping</code></a></li>
|
|
<li><a href="#frontend">Prompt</a></li>
|
|
<li><a href="#cmdps"><code>ps</code></a></li>
|
|
<li><a href="#cmdput"><code>put</code></a></li>
|
|
<li><a href="#cmdpwd"><code>pwd</code></a></li>
|
|
<li><a href="#environvars"><code>PWD</code></a></li>
|
|
<li><a href="#custinit"><code>rcS.template</code></a></li>
|
|
<li><a href="#cmdoverview">Re-directed commands</a></li>
|
|
<li><a href="#custapps">Registration of named applications</a></li>
|
|
<li><a href="#cmdrm"><code>rm</code></a></li>
|
|
<li><a href="#cmdrmdir"><code>rmdir</code></a></li>
|
|
<li><a href="#custinit">ROMFS, Modifying the ROMFS image</a></li>
|
|
<li><a href="#cmdset"><code>set</code></a></li>
|
|
<li><a href="#cmdsh"><code>sh</code></a></li>
|
|
<li><a href="#cmdoverview">Simple commands</a></li>
|
|
<li><a href="#cmdsleep"><code>sleep</code></a></li>
|
|
<li><a href="#custinit">Start-up, Default behavior</a></li>
|
|
<li><a href="#startupscript">Start-up script</a>
|
|
<li><a href="#custinit">Start-up script</a></li>
|
|
<li><a href="#custapps">Synchronous built-in applications</a></li>
|
|
<li><a href="#cmdtest"><code>test</code></a></li>
|
|
<li><a href="#cmdunmount"><code>umount</code></a></li>
|
|
<li><a href="#cmdunset"><code>unset</code></a></li>
|
|
<li><a href="#custonshlib"><code>up_cxxinitialize()</code></a></li>
|
|
<li><a href="#custinit"><code>up_nsh.c</code></a></li>
|
|
<li><a href="#cmdusleep"><code>usleep</code></a></li>
|
|
<li><a href="#custapps"><code>waitpid()</code></a></li>
|
|
<li><a href="#cmdwget"><code>wget</code></a></li>
|
|
<li><a href="#cmdxd"><code>xd</code></a></li>
|
|
<li><a href="#custinit"><code>xxd</code></a></li>
|
|
</ul></td>
|
|
</tr></table>
|
|
|
|
</body>
|
|
</html>
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