librenms/includes/common.php

<?php

## Common Functions

function device_by_id_cache($device_id)
{
  global $device_cache;
  if (is_array($device_cache[$device_id]))
  {
    $device = $device_cache[$device_id];
  } else {
    $device = mysql_fetch_array(mysql_query("SELECT * FROM `devices` WHERE `device_id` = '".$device_id."'"));
    $device_cache[$device_id] = $device;
  }
  return $device;
}

function truncate($substring, $max = 50, $rep = '...'){
  if(strlen($substring) < 1){ $string = $rep; } else { $string = $substring; }
  $leave = $max - strlen ($rep);
  if(strlen($string) > $max){ return substr_replace($string, $rep, $leave); } else { return $string; }
}

function mres($string) { // short function wrapper because the real one is stupidly long and ugly. aestetics.
  return mysql_real_escape_string($string);
}

function getifhost($id) {
     $sql = mysql_query("SELECT `device_id` from `ports` WHERE `interface_id` = '$id'");
     $result = @mysql_result($sql, 0);
     return $result;
}

function gethostbyid($id) {
     $sql = mysql_query("SELECT `hostname` FROM `devices` WHERE `device_id` = '$id'");
     $result = @mysql_result($sql, 0);
     return $result;
}

function strgen ($length = 16)
{
    $entropy = array(0,1,2,3,4,5,6,7,8,9,'a','A','b','B','c','C','d','D','e',
    'E','f','F','g','G','h','H','i','I','j','J','k','K','l','L','m','M','n',
    'N','o','O','p','P','q','Q','r','R','s','S','t','T','u','U','v','V','w',
    'W','x','X','y','Y','z','Z');
    $string = "";
    for ($i=0; $i<$length; $i++) {
        $key = mt_rand(0,61);
        $string .= $entropy[$key];
    }
    return $string;
}

function getpeerhost($id) {
     $sql = mysql_query("SELECT `device_id` from `bgpPeers` WHERE `bgpPeer_id` = '$id'");
     $result = @mysql_result($sql, 0);
     return $result;
}

function getifindexbyid($id) {
     $sql = mysql_query("SELECT `ifIndex` FROM `ports` WHERE `interface_id` = '$id'");
     $result = @mysql_result($sql, 0);
     return $result;
}

function getifbyid($id) {
     $sql = mysql_query("SELECT * FROM `ports` WHERE `interface_id` = '$id'");
     $result = @mysql_fetch_array($sql);
     return $result;
}

function getifdescrbyid($id) {
     $sql = mysql_query("SELECT `ifDescr` FROM `ports` WHERE `interface_id` = '$id'");
     $result = @mysql_result($sql, 0);
     return $result;
}

function getidbyname($domain){
     $sql = mysql_query("SELECT `device_id` FROM `devices` WHERE `hostname` = '$domain'");
     $result = @mysql_result($sql, 0);
     return $result;
}

function gethostosbyid($id) {
     $sql = mysql_query("SELECT `os` FROM `devices` WHERE `device_id` = '$id'");
     $result = @mysql_result($sql, 0);
     return $result;
}

function safename($name) 
{
  return preg_replace('/[^a-zA-Z0-9,._\-]/', '_', $name);

}


?>