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diff --git a/doxygen/siphon_templates/clicmd/index_header.md b/doxygen/siphon_templates/clicmd/index_header.md new file mode 100644 index 00000000000..4167f4dc477 --- /dev/null +++ b/doxygen/siphon_templates/clicmd/index_header.md @@ -0,0 +1,130 @@ +{# +# Copyright (c) 2016 Comcast Cable Communications Management, LLC. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at: +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +#} +# Debug CLI {{'{#'}}clicmd} + +The VPP network stack comes equipped with a set of commands that are useful +for debugging. + +The easiest way to access the CLI (with proper permissions) is to use the +vppctl command: + +``` +sudo vppctl <cli-command> +``` + +The CLI parser matches static keyword strings, eventually invoking an action +function. Unambiguous partial keyword matching always occurs. The action +functions consume input until satisfied or until they fail. This model makes +for easy coding, but does not guarantee useful "help" output. It's up to the +CLI command writer to add useful help strings. + +You can find the source code of CLI commands by searching for instances of the +@c VLIB_CLI_COMMAND macro in the code source files. + +Please help maintain and improve this document to make and keep these commands +clear and useful! + +@todo Document where to modify this CLI intro text. + + +## Debug and Telnet CLI + +The debug CLI is enabled with the unix interactive parameter or startup +configuration option. This causes VPP to start without daemonizing and +presents a command line interface on the terminal where it is run. + +The Telnet CLI is enabled with the `cli-listen localhost:5002` option which +will cause VPP to listen for TCP connections on the localhost address port +@c 5002. A Telnet client can then connect to this port (for example, `telnet +localhost 5002`) and will receive a command line prompt. + +This configuration will enable both mechanisms: + +``` +unix { + interactive + cli-listen localhost:5002 +} +``` + +The debug CLI can operate in line mode, which may be useful when running +inside an IDE like Emacs. This is enabled with the option +`unix cli-line-mode`. Several other options exist that alter how this +CLI works, see the @ref syscfg section for details. + +The CLI starts with a banner graphic (which can be disabled) and a prompt. The +prompt will typically read `vpp` for a release version of VPP and `DBGvpp#` +for a development version with debugging enabled, for example: + + _______ _ _ _____ ___ + __/ __/ _ \ (_)__ | | / / _ \/ _ \ + _/ _// // / / / _ \ | |/ / ___/ ___/ + /_/ /____(_)_/\___/ |___/_/ /_/ + + vpp# + +versus: + + _______ _ _ _____ ___ + __/ __/ _ \ (_)__ | | / / _ \/ _ \ + _/ _// // / / / _ \ | |/ / ___/ ___/ + /_/ /____(_)_/\___/ |___/_/ /_/ + + DBGvpp# + +This prompt can be configured with the `unix cli-prompt` setting and the +banner is disabled with `unix cli-no-banner`. + +## CLI features + +The CLI has several editing features that make it easy to use. + +- Cursor keys left/right will move the cursor within a command line; + typing will insert at the cursor; erase will erase at the cursor. + +- Ctrl-left/right will search for the start of the next word to + the left or right. +- Home/end will jump the cursor to the start and end of the line. +- Cursor keys up/down and ^P/^N iterate through the command history + buffer. Lines from the history buffer may be edited. New commands + are added to the end of the buffer when executed; though + duplicates of the previous command are not added. +- ^U erases the line contents from the left of the cursor to the + start. +- ^K erases the contents from the cursor to the end. +- ^S/^R will search the command history forwards or in reverse for + a command; start typing for matches to auto complete. +- ^L will clear the screen (if supported by the terminal) and repaint + the prompt and any current line. The cursor position is also + retained. +- The CLI can be closed with the quit command. Alternatively, ^D on + an empty input line will also close the session. Closing the debug + session will also shutdown VPP. + +Output that exceeds the length of a terminal page will be buffered, up to a +limit. + +- Space or page-down displays the next page. +- Enter or down-arrow displays the next line. +- Page-up goes back a page. +- Up-arrow goes up a line. +- Home/end jump to the start/end of the buffered output. +- The key q quits the pager. Space and enter will also quit the + pager if the end of the buffer has been reached. + +## Index of CLI commands + +[TOC] |