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<?php
/*
* This file is part of Linfo (c) 2010 Joseph Gillotti.
*
* Linfo is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Linfo is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Linfo. If not, see <http://www.gnu.org/licenses/>.
*
*/
defined('IN_INFO') or exit;
/*
* The BSD os's are largely similar and thus draw from this class.
*/
abstract class OS_BSD_Common {
// Store these
protected
$settings,
$exec,
$error,
$dmesg,
$sysctl = array();
// Start us off
protected function __construct($settings) {
// Localize settings
$this->settings = $settings;
// Localize error handler
$this->error = LinfoError::Fledging();
// Exec running
$this->exec = new CallExt;
// Get dmesg
$this->loadDmesg();
}
// Save dmesg
protected function loadDmesg() {
$this->dmesg = getContents('/var/run/dmesg.boot');
}
// Use sysctl to get something, and cache result.
// Also allow getting multiple keys at once, in which case sysctl
// will only be called once instead of multiple times (assuming it doesn't break)
protected function getSysCTL($keys, $do_return = true) {
// Get the keys as an array, so we can treat it as an array of keys
$keys = (array) $keys;
// Store the results of which here
$results = array();
// Go through each
foreach ($keys as $k => $v) {
// unfuck evil shit, such as malicious shell injection
$keys[$k] = escapeshellarg($v);
// Check and see if we have any of these already. If so, use previous
// values and don't retrive them again
if (array_key_exists($v, $this->sysctl)) {
unset($keys[$k]);
$results[$v] = $this->sysctl[$v];
}
}
// Try running sysctl to get all the values together
try {
// Result of sysctl
$command = $this->exec->exec('sysctl', implode(' ', $keys));
// Place holder
$current_key = false;
// Go through each line
foreach (explode("\n", $command) as $line) {
// If this is the beginning of one of the keys' values
if (preg_match('/^([a-z0-9\.\-\_]+)\s*(?:\:|=)(.+)/', $line, $line_match) == 1) {
if ($line_match[1] != $current_key) {
$current_key = $line_match[1];
$results[$line_match[1]] = trim($line_match[2]);
}
}
// If this line is a continuation of one of the keys' values
elseif($current_key != false) {
$results[$current_key] .= "\n".trim($line);
}
}
}
// Something broke with that sysctl call; try getting
// all the values separately (slower)
catch(CallExtException $e) {
// Go through each
foreach ($keys as $v) {
// Try it
try {
$results[$v] = $this->exec->exec('sysctl', $v);
}
// Didn't work again... just forget it and set value to empty string
catch (CallExtException $e) {
$results[$v] = '';
}
}
}
// Cache these incase they're called upon again
$this->sysctl = array_merge($results, $this->sysctl);
// Return an array of all values retrieved, or if just one was
// requested, then that one as a string
if ($do_return)
return count($results) == 1 ? reset($results) : $results;
}
}
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