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<?php
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/* $Id$ */
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/*
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cmd_chain.inc
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Part of pfSense
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Copyright (C) 2008 Scott Ullrich
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* HANDY FOR STAND ALONE DEBUGGING OF CLASS.
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*
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function log_error($text) {
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echo $text . "\n";
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}
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*/
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/*
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* CmdCHAIN allows a chaining of commands into one call.
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* If debugging is enabled verbose logging is applied.
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* During the command(s) execution if it fails the result
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* will be reported to syslog so that the problem can be reported.
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*/
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Class CmdCHAIN {
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var $cmd_chain_array = array();
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var $is_debugging;
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var $halt_on_errors = true;
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/* clear() erases the current cmdchain */
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function clear() {
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unset($cmd_chain_array);
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$this->cmd_chain_array = array();
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}
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/* enables log_error() of each command we run */
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function setdebug() {
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$this->is_debugging = true;
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}
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/* no halt execution of CmdCHAIN if there is a failure */
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function nohaltonerror() {
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$this->halt_on_errors = false;
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}
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/* halts execution of CmdCHAIN if there is a failure */
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function sethaltonerror() {
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$this->halt_on_errors = true;
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}
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/* adds a command to the CmdCHAIN */
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function add($cmd_title = "", $command = "", $ignore_return_text = false) {
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if(!$cmd_title)
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return;
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if(!$command)
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return;
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$temp = array();
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$temp['cmd_title'] = $cmd_title;
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$temp['command'] = $command;
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if($ignore_return_text)
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$temp['ignore_return_text'] = true;
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else
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$temp['ignore_return_text'] = false;
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$this->cmd_chain_array[] = $temp; // add array to class
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return array();
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}
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/* executes the CmdCHAIN one command at a time */
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function execute() {
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foreach($this->cmd_chain_array as $cmd) {
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$cmd_title = $cmd['cmd_title'];
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$command = $cmd['command'];
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$ignore_return_text = $cmd['ignore_return_text'];
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// Should we perform verbose debugging?
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if($this->is_debugging == true) {
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log_error("CmdCHAIN is executing -> {$cmd_title} - {$command}");
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usleep(100); // give network stack time to deliver network syslog message
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}
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// Execute command
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$status = exec($command);
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if($this->ignore_return_text == true)
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continue;
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if(intval($status) <> 0) {
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log_error("{$cmd_title} failed with return code -> {$status}. The command was {$command}");
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if($this->halt_on_errors == true)
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return("{$cmd_title} failed with return code -> {$status}. The command was {$command}");
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}
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}
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return;
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}
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}
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/*
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* example usage:
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*
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$cmdchain = new CmdCHAIN();
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$cmdchain->add("grab freebsd version", "uname -a", false);
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$cmdchain->setdebug(); // optional for verbose logging
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$cmdchain->nohaltonerror(); // tells cmdchain to keep processing commands if any of them fail
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$cmdchain->execute();
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$cmdchain->clear(); // clears the previous added entries
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*/
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?>
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