488 lines
35 KiB
ReStructuredText
488 lines
35 KiB
ReStructuredText
.. |br| raw:: html
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<br/>
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======================
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Configuration Settings
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======================
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The availability of the above commands depends upon features that may or
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may not be enabled in the NuttX configuration file. The following
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:ref:`cmdtable <cmddependencies>` indicates the dependency of each command on
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NuttX configuration settings. General configuration settings are
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discussed in the NuttX Porting Guide.
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Configuration settings specific to NSH as discussed at the
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:ref:`cmdbottom <nshconfiguration>` of this document.
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Note that in addition to general NuttX configuration settings, each NSH
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command can be individually disabled via the settings in the rightmost
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column. All of these settings make the configuration of NSH potentially
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complex but also allow it to squeeze into very small memory footprints.
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.. _cmddependencies:
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Command Dependencies on Configuration Settings
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==============================================
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====================== =========================================== ======================
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Command Depends on Configuration Can Be Disabled with
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====================== =========================================== ======================
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``[`` ! ``CONFIG_NSH_DISABLESCRIPT`` ``CONFIG_NSH_DISABLE_TEST``
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:ref:`cmdaddroute` ``CONFIG_NET`` && ``CONFIG_NET_ROUTE`` ``CONFIG_NSH_DISABLE_ADDROUTE``
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:ref:`cmdarp` ``CONFIG_NET`` && ``CONFIG_NET_ARP`` ``CONFIG_NSH_DISABLE_ARP``
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:ref:`cmdbase64dec` ``CONFIG_NETUTILS_CODECS`` && ``CONFIG_NSH_DISABLE_BASE64DEC``
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``CONFIG_CODECS_BASE64``
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:ref:`cmdbase64enc` ``CONFIG_NETUTILS_CODECS`` && ``CONFIG_NSH_DISABLE_BASE64ENC``
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``CONFIG_CODECS_BASE64``
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:ref:`cmdbasename` . ``CONFIG_NSH_DISABLE_BASENAME``
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:ref:`cmdbreak` ! ``CONFIG_NSH_DISABLESCRIPT`` && .
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! ``CONFIG_NSH_DISABLE_LOOPS``
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:ref:`cmdcat` ``CONFIG_NSH_DISABLE_CAT`` .
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:ref:`cmdcd` ! ``CONFIG_DISABLE_ENVIRON`` ``CONFIG_NSH_DISABLE_CD``
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:ref:`cmdcmp` ``CONFIG_NSH_DISABLE_CMP`` .
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:ref:`cmdcp` ``CONFIG_NSH_DISABLE_CP`` .
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:ref:`cmddate` ``CONFIG_NSH_DISABLE_DATE`` .
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:ref:`cmddd` ``CONFIG_NSH_DISABLE_DD`` .
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:ref:`cmddelroute` ``CONFIG_NET`` && ``CONFIG_NET_ROUTE`` ``CONFIG_NSH_DISABLE_DELROUTE``
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:ref:`cmddf` ! ``CONFIG_DISABLE_MOUNTPOINT`` ``CONFIG_NSH_DISABLE_DF``
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:ref:`cmddirname` ``CONFIG_NSH_DISABLE_DIRNAME`` .
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:ref:`cmddmesg` ``CONFIG_RAMLOG_SYSLOG`` ``CONFIG_NSH_DISABLE_DMESG``
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:ref:`cmdecho` ``CONFIG_NSH_DISABLE_ECHO`` .
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:ref:`cmdenv` ``CONFIG_FS_PROCFS`` && ``CONFIG_NSH_DISABLE_ENV``
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! ``CONFIG_DISABLE_ENVIRON`` && |br|
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! ``CONFIG_PROCFS_EXCLUDE_ENVIRON``
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:ref:`cmdexec` ``CONFIG_NSH_DISABLE_EXEC`` .
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:ref:`cmdexit` ``CONFIG_NSH_DISABLE_EXIT`` .
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:ref:`cmdexport` ``CONFIG_NSH_VARS`` &&
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! ``CONFIG_DISABLE_ENVIRON`` ``CONFIG_NSH_DISABLE_EXPORT``
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:ref:`cmdfree` ``CONFIG_NSH_DISABLE_FREE`` .
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:ref:`cmdget` ``CONFIG_NET`` && ``CONFIG_NET_UDP`` && ``CONFIG_NSH_DISABLE_GET``
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*MTU* >= 58\ [#1]_
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:ref:`cmdhelp` [#3]_ ``CONFIG_NSH_DISABLE_HELP`` .
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:ref:`cmdhexdump` ``CONFIG_NSH_DISABLE_HEXDUMP`` .
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:ref:`cmdifconfig` ``CONFIG_NET`` && ``CONFIG_FS_PROCFS`` && ``CONFIG_NSH_DISABLE_IFCONFIG``
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! ``CONFIG_FS_PROCFS_EXCLUDE_NET``
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:ref:`cmdifdown` ``CONFIG_NET`` && ``CONFIG_FS_PROCFS`` && ``CONFIG_NSH_DISABLE_IFUPDOWN``
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! ``CONFIG_FS_PROCFS_EXCLUDE_NET``
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:ref:`cmdifup` ``CONFIG_NET`` && ``CONFIG_FS_PROCFS`` &&
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! ``CONFIG_FS_PROCFS_EXCLUDE_NET`` ``CONFIG_NSH_DISABLE_IFUPDOWN``
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:ref:`cmdinsmod` ``CONFIG_MODULE`` ``CONFIG_NSH_DISABLE_MODCMDS``
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:ref:`cmdirqinfo` ! ``CONFIG_DISABLE_MOUNTPOINT`` && .
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``CONFIG_FS_PROCFS`` && |br|
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``CONFIG_SCHED_IRQMONITOR``
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:ref:`cmdkill` ``CONFIG_NSH_DISABLE_KILL`` .
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:ref:`cmdlosetup` ! ``CONFIG_DISABLE_MOUNTPOINT`` && ``CONFIG_NSH_DISABLE_LOSETUP``
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``CONFIG_DEV_LOOP``
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:ref:`cmdln` ``CONFIG_PSEUDOFS_SOFTLINKS`` ``CONFIG_NSH_DISABLE_LN``
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:ref:`cmdls` ``CONFIG_NSH_DISABLE_LS`` .
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:ref:`cmdlsmod` ``CONFIG_MODULE`` && ``CONFIG_FS_PROCFS`` ``CONFIG_NSH_DISABLE_MODCMDS``
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&& |br|
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! ``CONFIG_FS_PROCFS_EXCLUDE_MODULE``
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:ref:`cmdmd5` ``CONFIG_NETUTILS_CODECS`` && ``CONFIG_NSH_DISABLE_MD5``
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``CONFIG_CODECS_HASH_MD5``
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:ref:`cmdmx` . ``CONFIG_NSH_DISABLE_MB``, |br|
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``CONFIG_NSH_DISABLE_MH``, |br|
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``CONFIG_NSH_DISABLE_MW``
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:ref:`cmdmkdir` (! ``CONFIG_DISABLE_MOUNTPOINT`` \|\| ``CONFIG_NSH_DISABLE_MKDIR``
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! ``CONFIG_DISABLE_PSEUDOFS_OPERATIONS``)
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:ref:`cmdmkfatfs` ! ``CONFIG_DISABLE_MOUNTPOINT`` && ``CONFIG_NSH_DISABLE_MKFATFS``
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``CONFIG_FSUTILS_MKFATFS``
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:ref:`cmdmkfifo` ``CONFIG_PIPES`` && ``CONFIG_NSH_DISABLE_MKFIFO``
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``CONFIG_DEV_FIFO_SIZE`` > 0
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:ref:`cmdmkrd` ! ``CONFIG_DISABLE_MOUNTPOINT`` ``CONFIG_NSH_DISABLE_MKRD``
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:ref:`cmdmount` ! ``CONFIG_DISABLE_MOUNTPOINT`` ``CONFIG_NSH_DISABLE_MOUNT``
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:ref:`cmdmv` ! ``CONFIG_DISABLE_MOUNTPOINT`` \|\| ``CONFIG_NSH_DISABLE_MV``
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! ``CONFIG_DISABLE_PSEUDOFS_OPERATIONS``
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:ref:`cmdnfsmount` ! ``CONFIG_DISABLE_MOUNTPOINT`` && ``CONFIG_NSH_DISABLE_NFSMOUNT``
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``CONFIG_NET`` && ``CONFIG_NFS``
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:ref:`cmdnslookup` ``CONFIG_LIBC_NETDB`` && ``CONFIG_NSH_DISABLE_NSLOOKUP``
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``CONFIG_NETDB_DNSCLIENT``
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:ref:`cmdpasswd` ! ``CONFIG_DISABLE_MOUNTPOINT`` && ``CONFIG_NSH_DISABLE_PASSWD``
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``CONFIG_NSH_LOGIN_PASSWD``
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:ref:`cmdpmconfig` ``CONFIG_PM`` ``CONFIG_NSH_DISABLE_PMCONFIG``
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:ref:`cmdpoweroff` ``CONFIG_BOARDCTL_POWEROFF`` ``CONFIG_NSH_DISABLE_POWEROFF``
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:ref:`cmdps` ``CONFIG_FS_PROCFS`` && ``CONFIG_NSH_DISABLE_PS``
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! ``CONFIG_FS_PROCFS_EXCLUDE_PROC``
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:ref:`cmdput` ``CONFIG_NET`` && ``CONFIG_NET_UDP`` && ``CONFIG_NSH_DISABLE_PUT``
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``MTU >= 558`` [#1]_, [#2]_
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:ref:`cmdpwd` ! ``CONFIG_DISABLE_ENVIRON`` ``CONFIG_NSH_DISABLE_PWD``
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:ref:`cmdreadlink` ``CONFIG_PSEUDOFS_SOFTLINKS`` ``CONFIG_NSH_DISABLE_READLINK``
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:ref:`cmdreboot` ``CONFIG_BOARD_RESET`` ``CONFIG_NSH_DISABLE_REBOOT``
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:ref:`cmdrm` ! ``CONFIG_DISABLE_MOUNTPOINT`` \|\| ``CONFIG_NSH_DISABLE_RM``
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! ``CONFIG_DISABLE_PSEUDOFS_OPERATIONS``
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:ref:`cmdrmdir` ! ``CONFIG_DISABLE_MOUNTPOINT`` \|\
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! ``CONFIG_DISABLE_PSEUDOFS_OPERATIONS`` ``CONFIG_NSH_DISABLE_RMDIR``
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:ref:`cmdrmmod` ``CONFIG_MODULE`` ``CONFIG_NSH_DISABLE_MODCMDS``
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:ref:`cmdroute` ``CONFIG_FS_PROCFS`` && ``CONFIG_NSH_DISABLE_ROUTE``
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``CONFIG_FS_PROCFS_EXCLUDE_NET`` && |br|
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! ``CONFIG_FS_PROCFS_EXCLUDE_ROUTE`` &&
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``CONFIG_NET_ROUTE`` && |br|
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! ``CONFIG_NSH_DISABLE_ROUTE`` && |br|
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(``CONFIG_NET_IPv4`` \|\
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``CONFIG_NET_IPv6``)
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:ref:`cmdrptun` ``CONFIG_RPTUN`` ``CONFIG_NSH_DISABLE_RPTUN``
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:ref:`cmdset` ``CONFIG_NSH_VARS`` \|\| ``CONFIG_NSH_DISABLE_SET``
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! ``CONFIG_DISABLE_ENVIRON``
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:ref:`cmdshutdown` ``CONFIG_BOARDCTL_POWEROFF`` \|\| ``CONFIG_NSH_DISABLE_SHUTDOWN``
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``CONFIG_BOARD_RESET``
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:ref:`cmdsleep` . ``CONFIG_NSH_DISABLE_SLEEP``
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``cmdsource`` ``CONFIG_FILE_STREAM`` && ``CONFIG_NSH_DISABLE_SOURCE``
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! ``CONFIG_NSH_DISABLESCRIPT``
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:ref:`cmdtelnetd` ``CONFIG_NSH_TELNET`` ``CONFIG_NSH_DISABLE_TELNETD``
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:ref:`cmdtest` ! ``CONFIG_NSH_DISABLESCRIPT`` ``CONFIG_NSH_DISABLE_TEST``
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:ref:`cmdtime` . ``CONFIG_NSH_DISABLE_TIME``
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:ref:`cmdtruncate` ! ``CONFIG_DISABLE_MOUNTPOINT`` ``CONFIG_NSH_DISABLE_TRUNCATE``
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:ref:`cmdumount` ! ``CONFIG_DISABLE_MOUNTPOINT`` ``CONFIG_NSH_DISABLE_UMOUNT``
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:ref:`cmduname` . ``CONFIG_NSH_DISABLE_UNAME``
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:ref:`cmdunset` ``CONFIG_NSH_VARS`` \|\| ``CONFIG_NSH_DISABLE_UNSET``
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! ``CONFIG_DISABLE_ENVIRON``
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:ref:`cmdurldecode` ! ``CONFIG_NETUTILS_CODECS`` && ``CONFIG_NSH_DISABLE_URLDECODE``
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``CONFIG_CODECS_URLCODE``
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:ref:`cmdurlencode` ! ``CONFIG_NETUTILS_CODECS`` && ``CONFIG_NSH_DISABLE_URLENCODE``
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``CONFIG_CODECS_URLCODE``
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:ref:`cmduseradd` ! ``CONFIG_DISABLE_MOUNTPOINT`` && ``CONFIG_NSH_DISABLE_USERADD``
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``CONFIG_NSH_LOGIN_PASSWD``
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:ref:`cmduserdel` ! ``CONFIG_DISABLE_MOUNTPOINT`` && ``CONFIG_NSH_DISABLE_USERDEL``
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``CONFIG_NSH_LOGIN_PASSWD``
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:ref:`cmdusleep` . ``CONFIG_NSH_DISABLE_USLEEP``
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:ref:`cmdwget` ``CONFIG_NET`` && ``CONFIG_NET_TCP`` ``CONFIG_NSH_DISABLE_WGET``
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:ref:`cmdxd` . ``CONFIG_NSH_DISABLE_XD``
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====================== =========================================== ======================
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.. [#1] Because of hardware padding, the actual required packet size may be larger
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.. [#2] Special TFTP server start-up options will probably be required to permit creation of files for the correct operation of the ``put`` command.
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.. [#3] Verbose help output can be suppressed by defining ``CONFIG_NSH_HELP_TERSE``. In that case, the help command is still available but will be slightly smaller.
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Built-In Command Dependencies on Configuration Settings
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=======================================================
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All built-in applications require that support for NSH built-in
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applications has been enabled. This support is enabled with
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``CONFIG_BUILTIN=y`` and ``CONFIG_NSH_BUILTIN_APPS=y``.
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============= ==================================================================================================
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Command Depends on Configuration
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============= ==================================================================================================
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``ping`` ``CONFIG_NET`` && ``CONFIG_NET_ICMP`` && ``CONFIG_NET_ICMP_SOCKET`` && ``CONFIG_SYSTEM_PING``
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``ping6`` ``CONFIG_NET`` && ``CONFIG_NET_ICMPv6`` && ``CONFIG_NET_ICMPv6_SOCKET`` && ``CONFIG_SYSTEM_PING6``
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============= ==================================================================================================
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.. _nshconfiguration:
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NSH-Specific Configuration Settings
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===================================
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The behavior of NSH can be modified with the following settings in the
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``boards/<arch>/<chip>/<board>/defconfig`` file:
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=================================== ==================================
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Configuration Description
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=================================== ==================================
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``CONFIG_NSH_READLINE`` Selects the minimal implementation of ``readline()``.
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This minimal implementation provides on backspace for command
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line editing. It expects some minimal VT100 command support from the terminal.
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``CONFIG_NSH_CLE`` Selects the more extensive, EMACS-like command line editor.
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Select this option only if (1) you don't mind a modest increase
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in the FLASH footprint, and (2) you work with a terminal that
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supports extensive VT100 editing commands. Selecting this option
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will add probably 1.5-2KB to the FLASH footprint.
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``CONFIG_NSH_BUILTIN_APPS`` Support external registered, "builtin" applications that can
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be executed from the NSH command line (see apps/README.txt for
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more information). This required ``CONFIG_BUILTIN`` to enable
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NuttX support for "builtin" applications.
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``CONFIG_NSH_FILEIOSIZE`` Size of a static I/O buffer used for file access (ignored if there
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is no file system). Default is 1024.
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``CONFIG_NSH_STRERROR`` ``strerror(errno)`` makes more readable output but
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``strerror()`` is very large and will not be used unless this
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setting is *y*. This setting depends upon the ``strerror()``
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having been enabled with ``CONFIG_LIBC_STRERROR``.
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``CONFIG_NSH_LINELEN`` The maximum length of one command line and of one output line.
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Default: 80
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``CONFIG_NSH_DISABLE_SEMICOLON`` By default, you can enter multiple NSH commands on a line
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with each command separated by a semicolon. You can disable this
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feature to save a little memory on FLASH challenged platforms.
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Default: n
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``CONFIG_NSH_CMDPARMS`` If selected, then the output from commands, from file applications,
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and from NSH built-in commands can be used as arguments to other
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commands. The entity to be executed is identified by
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enclosing the command line in back quotes. For example::
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set FOO `myprogram $BAR`
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will execute the program named ``myprogram`` passing it the
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value of the environment variable ``BAR``. The value of the
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environment variable ``FOO`` is then set output of ``myprogram``
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on ``stdout``. Because this feature commits significant
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resources, it is disabled by default. The ``CONFIG_NSH_CMDPARMS`` interim
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output will be retained in a temporary file. Full path to a
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directory where temporary files can be created is taken from
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``CONFIG_LIBC_TMPDIR`` and it defaults to ``/tmp`` if
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``CONFIG_LIBC_TMPDIR`` is not set.
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``CONFIG_NSH_MAXARGUMENTS`` The maximum number of NSH command arguments. Default: 6
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``CONFIG_NSH_ARGCAT`` Support concatenation of strings with environment variables or
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command output. For example::
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set FOO XYZ
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set BAR 123
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set FOOBAR ABC_${FOO}_${BAR}
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would set the environment variable ``FOO`` to ``XYZ``,
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``BAR`` to ``123`` and ``FOOBAR`` to ``ABC_XYZ_123``. If
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``CONFIG_NSH_ARGCAT`` is not selected, then a slightly small
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FLASH footprint results but then also only simple environment
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variables like ``$FOO`` can be used on the command line.
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``CONFIG_NSH_VARS`` By default, there are no internal NSH variables. NSH will use OS
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environment variables for all variable storage. If this option,
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NSH will also support local NSH variables. These variables are,
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for the most part, transparent and work just like the OS
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environment variables. The difference is that when you
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create new tasks, all of environment variables are
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inherited by the created tasks. NSH local variables are not.
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If this option is enabled (and ``CONFIG_DISABLE_ENVIRON`` is not),
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then a new command called 'export' is enabled. The export
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command works very must like the set command except that is
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operates on environment variables. When CONFIG_NSH_VARS
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is enabled, there are changes in the behavior of certain commands.
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See following :ref:`cmdtable <nsh_vars_table>`.
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``CONFIG_NSH_QUOTE`` Enables back-slash quoting of certain characters within the
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command. This option is useful for the case where an NSH script
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is used to dynamically generate a new NSH script. In that case,
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commands must be treated as simple text strings without
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interpretation of any special characters. Special characters
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such as ``$``, :literal:`\``, ``"``, and others must be
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retained intact as part of the test string. This option is
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currently only available is ``CONFIG_NSH_ARGCAT`` is also
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selected.
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``CONFIG_NSH_NESTDEPTH`` The maximum number of nested ``if-then[-else]-fi`` <#conditional>`__
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sequences that are permissible. Default: 3
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``CONFIG_NSH_DISABLESCRIPT`` This can be set to *y* to suppress support for scripting.
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This setting disables the ```sh`` <#cmdsh>`__,
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```test`` <#cmdtest>`__, and ```[`` <#cmtest>`__ commands and
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the ```if-then[-else]-fi`` <#conditional>`__
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construct. This would only be set on systems where a minimal
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footprint is a necessity and scripting is not.
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``CONFIG_NSH_DISABLE_ITEF`` If scripting is enabled, then then this option can be selected
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to suppress support for ``if-then-else-fi`` sequences in
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scripts. This would only be set on systems where some minimal
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scripting is required but ``if-then-else-fi`` is not.
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``CONFIG_NSH_DISABLE_LOOPS`` If scripting is enabled, then then this option can be selected
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suppress support ``for while-do-done`` and
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``until-do-done`` sequences in scripts. This would only be set
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on systems where some minimal scripting is required but looping
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is not.
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``CONFIG_NSH_DISABLEBG`` This can be set to *y* to suppress support for background
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commands. This setting disables the ```nice`` <#cmdoverview>`__
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command prefix and the ```&`` <#cmdoverview>`__ command
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suffix. This would only be set on systems where a minimal footprint
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is a necessity and background command execution is not.
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``CONFIG_NSH_MMCSDMINOR`` If the architecture supports an MMC/SD slot and if the NSH
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architecture specific logic is present, this option will provide
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the MMC/SD minor number, i.e., the MMC/SD block driver will be
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registered as ``/dev/mmcsd``\ *N* where *N* is the minor number.
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Default is zero.
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``CONFIG_NSH_ROMFSETC`` Mount a ROMFS file system at ``/etc`` and provide a startup
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script at ``/etc/init.d/rcS``.
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The default startup script will mount a FAT FS RAMDISK at
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``/tmp`` but the logic is `easily extensible <#startupscript>`__.
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``CONFIG_NSH_CONSOLE`` If ``CONFIG_NSH_CONSOLE`` is set to *y*, then a serial console
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front-end is selected.
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Normally, the serial console device is a UART and RS-232
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interface. However, if ``CONFIG_USBDEV`` is defined,
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then a USB serial device may, instead, be used if the one of
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the following are defined:
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- ``CONFIG_PL2303`` and ``CONFIG_PL2303_CONSOLE``.
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Sets up the Prolifics PL2303 emulation as a console device
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at ``/dev/console``.
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- ``CONFIG_CDCACM`` and ``CONFIG_CDCACM_CONSOLE``.
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Sets up the CDC/ACM serial device as a console device at
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``/dev/console``.
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- ``CONFIG_NSH_USBCONSOLE``. If defined, then an arbitrary USB
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device may be used to as the NSH console. In this case,
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``CONFIG_NSH_USBCONDEV`` must be defined to indicate which
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USB device to use as the console. The advantage of
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using a device other that ``/dev/console`` is that
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normal debug output can then use ``/dev/console`` while NSH
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uses ``CONFIG_NSH_USBCONDEV``.
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``CONFIG_NSH_USBCONDEV``. If ``CONFIG_NSH_USBCONSOLE`` is
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set to 'y', then ``CONFIG_NSH_USBCONDEV`` must also be set to select the USB
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device used to support the NSH console. This should be set to
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the quoted name of a readable/write-able USB driver
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such as: ``CONFIG_NSH_USBCONDEV="/dev/ttyACM0"``.
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If there are more than one USB slots, then a USB device minor
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number may also need to be provided:
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- ``CONFIG_NSH_UBSDEV_MINOR``: The minor device number of the USB device. Default: 0
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If USB tracing is enabled (``CONFIG_USBDEV_TRACE``), then
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NSH will initialize USB tracing as requested by the following.
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Default: Only USB errors are traced.
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- ``CONFIG_NSH_USBDEV_TRACEINIT``: Show initialization events
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- ``CONFIG_NSH_USBDEV_TRACECLASS``: Show class driver events
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- ``CONFIG_NSH_USBDEV_TRACETRANSFERS``: Show data transfer events
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- ``CONFIG_NSH_USBDEV_TRACECONTROLLER``: Show controller events
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- ``CONFIG_NSH_USBDEV_TRACEINTERRUPTS``: Show interrupt-related events.
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``CONFIG_NSH_ALTCONDEV`` and If ``CONFIG_NSH_CONSOLE`` is set ``CONFIG_NSH_CONDEV``
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to *y*, then ``CONFIG_NSH_ALTCONDEV`` may also
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be selected to enable use of an alternate character device to
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support the NSH console. If ``CONFIG_NSH_ALTCONDEV`` is
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selected, then ``CONFIG_NSH_CONDEV`` holds the
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quoted name of a readable/write-able character
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driver such as: ``CONFIG_NSH_CONDEV="/dev/ttyS1"``.
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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: ``stdin`` and ``stdout`` (probably
|
||
"``/dev/console``")
|
||
|
||
- **NOTE 1:** When any other device other than
|
||
``/dev/console`` is used for a user interface, (1) linefeeds
|
||
(``\n``) will not be expanded to carriage return / linefeeds
|
||
(``\r\n``). 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.
|
||
- **NOTE 2:** This option forces the console of all sessions to
|
||
use NSH_CONDEV. Hence, this option only makes sense for a
|
||
system that supports only a single session. This option
|
||
is, in particular, incompatible with Telnet
|
||
sessions because each Telnet session must use a different
|
||
console device.
|
||
|
||
``CONFIG_NSH_TELNET`` If ``CONFIG_NSH_TELNET`` is set to *y*, then a TELNET server
|
||
front-end is selected. When this option is provided, you may log
|
||
into NuttX remotely using telnet in order to access NSH.
|
||
|
||
``CONFIG_NSH_ARCHINIT`` Set ``CONFIG_NSH_ARCHINIT`` if your board provides architecture
|
||
specific initialization via the board-specific function
|
||
``board_app_initialize()``. This function will be called early in
|
||
NSH initialization to allow board logic to do such things as
|
||
configure MMC/SD slots.
|
||
=================================== ==================================
|
||
|
||
.. _nsh_vars_table:
|
||
|
||
================== =================================== =============================================
|
||
CMD w/o ``CONFIG_NSH_VARS`` w/``CONFIG_NSH_VARS``
|
||
================== =================================== =============================================
|
||
``set <a> <b>`` Set environment variable <a> to <b> Set NSH variable <a> to <b> (Unless the NSH variable has been *promoted* via
|
||
``export``, in which case the env ironment variable of the same name is set to <b>).
|
||
``set`` Causes an error. Lists all NSH variables.
|
||
``unset <a>`` Unsets environment variable <a> Unsets both environment variable *and* NSH variable with and name <a>
|
||
``export <a> <b>`` Causes an error, Unsets NSH variable <a>. Sets environment variable <a> to <b>.
|
||
``export <a>`` Causes an error. Sets environment variable <a> to the value of NSH variable <a> (or "" if the
|
||
NSH variable has not been set). Unsets NSH local variable <a>.
|
||
``env`` Lists all environment variables Lists all environment variables (*only*)
|
||
================== =================================== =============================================
|
||
|
||
If Telnet is selected for the NSH console, then we must configure the
|
||
resources used by the Telnet daemon and by the Telnet clients.
|
||
|
||
====================================== ================================
|
||
Configuration Description
|
||
====================================== ================================
|
||
``CONFIG_NSH_TELNETD_PORT`` The telnet daemon will listen on this TCP port number for connections. Default: 23
|
||
``CONFIG_NSH_TELNETD_DAEMONPRIO`` Priority of the Telnet daemon. Default: ``SCHED_PRIORITY_DEFAULT``
|
||
``CONFIG_NSH_TELNETD_DAEMONSTACKSIZE`` Stack size allocated for the Telnet daemon. Default: 2048
|
||
``CONFIG_NSH_TELNETD_CLIENTPRIO`` Priority of the Telnet client. Default: ``SCHED_PRIORITY_DEFAULT``
|
||
``CONFIG_NSH_TELNETD_CLIENTSTACKSIZE`` Stack size allocated for the Telnet client. Default: 2048
|
||
====================================== ================================
|
||
|
||
One or both of ``CONFIG_NSH_CONSOLE`` and ``CONFIG_NSH_TELNET`` must be
|
||
defined. If ``CONFIG_NSH_TELNET`` is selected, then there some other
|
||
configuration settings that apply:
|
||
|
||
====================================== ================================
|
||
Configuration Description
|
||
====================================== ================================
|
||
``CONFIG_NET=y`` Of course, networking must be enabled.
|
||
``CONFIG_NET_TCP=y`` TCP/IP support is required for telnet (as well as various other
|
||
TCP-related configuration settings).
|
||
``CONFIG_NSH_IOBUFFER_SIZE`` Determines the size of the I/O buffer to use for sending/ receiving
|
||
TELNET commands/responses
|
||
``CONFIG_NSH_DHCPC`` Obtain the IP address via DHCP.
|
||
``CONFIG_NSH_IPADDR`` If ``CONFIG_NSH_DHCPC`` is NOT set, then the static IP address must be
|
||
provided.
|
||
``CONFIG_NSH_DRIPADDR`` Default router IP address
|
||
``CONFIG_NSH_NETMASK`` Network mask
|
||
``CONFIG_NSH_NOMAC`` Set if your Ethernet hardware has no built-in MAC address. If set, a
|
||
bogus MAC will be assigned.
|
||
``CONFIG_NSH_MAX_ROUNDTRIP`` This is the maximum round trip for a response to a ICMP ECHO request. It
|
||
is in units of deciseconds. The default is 20 (2 seconds).
|
||
====================================== ================================
|
||
|
||
If you use DHCPC, then some special configuration network options are
|
||
required. These include:
|
||
|
||
============================================== ============================================================
|
||
Configuration Description
|
||
============================================== ============================================================
|
||
``CONFIG_NET=y`` Of course, networking must be enabled.
|
||
``CONFIG_NET_UDP=y`` UDP support is required for DHCP (as well as various other
|
||
UDP-related configuration settings).
|
||
``CONFIG_NET_BROADCAST=y`` UDP broadcast support is needed.
|
||
``CONFIG_NET_ETH_PKTSIZE=650`` (or larger) 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). NOTE: Note that the actual MTU setting
|
||
will depend upon the specific link protocol. Here Ethernet
|
||
is indicated.
|
||
============================================== ============================================================
|
||
|
||
If ``CONFIG_NSH_ROMFSETC`` is selected, then the following additional
|
||
configuration setting apply:
|
||
|
||
============================== ==============================================================
|
||
Configuration Description
|
||
============================== ==============================================================
|
||
``CONFIG_NSH_ARCHROMFS`` May be defined to specify an alternative ROMFS image
|
||
that can be found at ``boards/<arch>/<chip>/<board>/include/nsh_romfsimg.h``.
|
||
``CONFIG_NSH_ROMFSMOUNTPT`` The default mountpoint for the ROMFS volume is ``"/etc"``,
|
||
but that can be changed with this setting. This must be a
|
||
absolute path beginning with '``/``' and enclosed in quotes.
|
||
``CONFIG_NSH_INITSCRIPT`` This is the relative path to the startup script within the
|
||
mountpoint. The default is ``"init.d/rcS"``. This is a relative
|
||
path and must not start with '``/``' but must be enclosed in quotes.
|
||
``CONFIG_NSH_ROMFSDEVNO`` This is the minor number of the ROMFS block device.
|
||
The default is '``0``' corresponding to ``/dev/ram0``.
|
||
``CONFIG_NSH_ROMFSSECTSIZE`` 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.
|
||
============================== ==============================================================
|
||
|
||
When the default ``rcS`` file used when ``CONFIG_NSH_ROMFSETC`` is
|
||
selected, it will mount a FAT FS under ``/tmp``. The following
|
||
selections describe that FAT FS.
|
||
|
||
============================== =======================================================
|
||
Configuration Description
|
||
============================== =======================================================
|
||
``CONFIG_NSH_FATDEVNO`` This is the minor number of the FAT FS block device.
|
||
The default is '``1``' corresponding to ``/dev/ram1``.
|
||
``CONFIG_NSH_FATSECTSIZE`` This is the sector size use with the FAT FS. Default is 512.
|
||
============================== =======================================================
|
||
|