ssh.inc.php

   1 <?php
   2
   3 class SSH {
   4         private $connection;
   5         private $shell;
   6         private $host;
   7         private $cmdstart = '[cmdstartline]';
   8         private $cmdend = '[cmdendline]';
   9
  10         function __construct($host) {
  11                 $this->host = $host;
  12         }
  13
  14         function connect() {
  15 //              $this->connection = ssh2_connect($this->host, 22);
  16                 $this->connection = ssh2_connect($this->host, 22, array('hostkey'=>'ssh-dss'));
  17                 if (!$this->connection) {
  18                         return 1;
  19                 }
  20                         /*
  21                 if (!@ssh2_auth_password($this->connection, 'mandrake', 'mandrake')) {
  22                          */
  23                 if (!@ssh2_auth_pubkey_file ($this->connection, 'mandrake',
  24                     '/home/mandrake/.ssh/id_dsa.pub',
  25                     '/home/mandrake/.ssh/id_dsa.bs')) {
  26                         return 2;
  27                 }
  28                 $this->shell = ssh2_shell($this->connection, 'vanilla', array('HISTFILE' => ''));
  29
  30                 // Wait for the login
  31                 $start_time = time();
  32                 $max_time = 20; //time in seconds
  33                 while (((time() - $start_time) < $max_time)) {
  34                         $buf = fgets ($this->shell);
  35                         if (strstr ($buf, '$')) {
  36                                 return 0;
  37                         }
  38                         usleep (100000);
  39                 }
  40                 // Timeout
  41                 return 3;
  42         }
  43
  44         function exec($cmd) {
  45                 flush();
  46                 $realcmd = "echo '".$this->cmdstart."'; ". $cmd ."; echo '".$this->cmdend."'\n";
  47                 if (fwrite ($this->shell, $realcmd) != strlen($realcmd)) {
  48                         return False;
  49                 }
  50                 flush();
  51                 $output = "";
  52                 $start = False;
  53                 $start_time = time();
  54                 $max_time = 30; //time in seconds
  55                 while (((time() - $start_time) < $max_time)) {
  56                         $line = fgets($this->shell);
  57                         if (!$line) {
  58                                 # Avoid CPU 100% usage.
  59                                 usleep (100000);
  60                                 continue;
  61                         }
  62                         if (!strstr ($line, $cmd)) {
  63                                 if (preg_match('/'.escapeshellcmd($this->cmdstart).'/',$line)) {
  64                                         $start = True;
  65                                 }
  66                                 elseif (preg_match('/'.escapeshellcmd($this->cmdend).'/',$line)) {
  67                                         if ($output) {
  68                                                 return array_map("trim", split("\n", $output));
  69                                         }
  70                                         else {
  71                                                 return False;
  72                                         }
  73                                 }
  74                                 elseif ($start) {
  75                                         $output .= $line;
  76                                 }
  77                         }
  78                 }
  79         }
  80 }
  81
  82 ?>