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juniper-config-to-set.php

@@ -0,0 +1,86 @@
+#!/usr/bin/php
+<?php
+
+/*****************************************************************************************
+*
+* Written by Tim Price 24/11/2016
+*
+* The purpose of this script is to take a juniper config and convert it to set commands.
+* There was a business need to audit thbe correctness of Juniper configs and the process 
+* of logging into each Juniper device and dumping the configs in set format was too 
+* burdensome on both the Juniper devices in question but also extended the execution time 
+* of the audit scripts by some minutes.
+*
+* The script will take a juniper config piped to it from STDIN and output the results to
+* STDOUT
+* 
+* Usage example:  `cat juniper-config.txt | juniper-config-to-set.php`
+*
+*****************************************************************************************/
+
+function endswith($string, $test) {
+    $strlen = strlen($string);
+    $testlen = strlen($test);
+    if ($testlen > $strlen) return false;
+    return substr_compare($string, $test, $strlen - $testlen, $testlen) === 0;
+}
+
+function addtotree($tree,$word) {
+	array_push($tree,$word);
+	return $tree;
+}
+
+function removewordfromtree($tree) {
+	array_pop($tree);
+	return $tree;
+}
+
+function printtree($tree) {
+	return implode(" ",$tree);
+}
+
+$tree=array();
+
+while($line = fgets(STDIN)){ 
+
+	// Skip any commented lines
+	if(strpos($line,'#')===0) {
+		continue;
+	}
+
+	// Trim white space from the line
+	$line=trim($line);
+
+	// What remains is a series of tests to see what the line ends with.
+
+	// This test matches a ';' character which means its a leaf and we can output the 
+	// whole line to STDOUT
+	if(endswith($line,';')) {
+
+		// Trim the semi-colon from the end of the line, we don't need that.
+		$line = rtrim($line,';');
+		
+		// Test to see if the tree is empty, if it is then we'll just print the leaf and 
+		// not the tree to avoid excess white spaces		
+		if(count($tree)==0) {
+			echo "set $line\n";
+		} else {
+			echo "set " . printtree($tree) . " $line\n";
+		}
+	}
+	
+	// This test matches a '{' character on the end of the line and means we need to add a
+	// branch to the tree
+	if(endswith($line,'{')) {
+		$line = rtrim($line,' {');
+		$tree=addtotree($tree,$line);
+	}
+
+	// This test matches a '}' character on the end of the line and means we need to 
+	// remove the last branch that we added to the tree
+	if(endswith($line,'}')) {
+		$tree=removewordfromtree($tree);
+	}
+}
+
+?>