pdns/rec_control.cc

   1 /*
   2     PowerDNS Versatile Database Driven Nameserver
   3     Copyright (C) 2006 - 2015 PowerDNS.COM BV
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License version 2 as
   7     published by the Free Software Foundation
   8
   9     Additionally, the license of this program contains a special
  10     exception which allows to distribute the program in binary form when
  11     it is linked against OpenSSL.
  12
  13     This program is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16     GNU General Public License for more details.
  17
  18     You should have received a copy of the GNU General Public License
  19     along with this program; if not, write to the Free Software
  20     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  21 */
  22 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25 #include "rec_channel.hh"
  26 #include <iostream>
  27 #include "pdnsexception.hh"
  28 #include "arguments.hh"
  29
  30 #include "namespaces.hh"
  31
  32 #ifndef RECURSOR
  33 #include "statbag.hh"
  34 StatBag S;
  35 #endif
  36
  37 ArgvMap &arg()
  38 {
  39   static ArgvMap arg;
  40   return arg;
  41 }
  42
  43 static void initArguments(int argc, char** argv)
  44 {
  45   arg().set("config-dir","Location of configuration directory (recursor.conf)")=SYSCONFDIR;
  46
  47   arg().set("socket-dir",string("Where the controlsocket will live, ")+LOCALSTATEDIR+" when unset and not chrooted" )="";
  48   arg().set("chroot","switch to chroot jail")="";
  49   arg().set("process","When controlling multiple recursors, the target process number")="";
  50   arg().set("timeout", "Number of seconds to wait for the recursor to respond")="5";
  51   arg().set("config-name","Name of this virtual configuration - will rename the binary image")="";
  52   arg().setCmd("help","Provide this helpful message");
  53
  54   arg().laxParse(argc,argv);
  55   if(arg().mustDo("help") || arg().getCommands().empty()) {
  56     cout<<"syntax: rec_control [options] command, options as below: "<<endl<<endl;
  57     cout<<arg().helpstring(arg()["help"])<<endl;
  58     cout<<"In addition, 'rec_control help' can be used to retrieve a list\nof available commands from PowerDNS"<<endl;
  59     exit(arg().mustDo("help") ? 0 : 99);
  60   }
  61
  62   string configname=::arg()["config-dir"]+"/recursor.conf";
  63   if (::arg()["config-name"] != "")
  64     configname=::arg()["config-dir"]+"/recursor-"+::arg()["config-name"]+".conf";
  65
  66   cleanSlashes(configname);
  67
  68   if(!::arg().preParseFile(configname.c_str(), "socket-dir", ""))
  69     cerr<<"Warning: unable to parse configuration file '"<<configname<<"'"<<endl;
  70   if(!::arg().preParseFile(configname.c_str(), "chroot", ""))
  71     cerr<<"Warning: unable to parse configuration file '"<<configname<<"'"<<endl;
  72
  73   arg().laxParse(argc,argv);   // make sure the commandline wins
  74
  75   if (::arg()["socket-dir"].empty()) {
  76     if (::arg()["chroot"].empty())
  77       ::arg().set("socket-dir") = LOCALSTATEDIR;
  78     else
  79       ::arg().set("socket-dir") = ::arg()["chroot"] + "/";
  80   } else if (!::arg()["chroot"].empty()) {
  81     ::arg().set("socket-dir") = ::arg()["chroot"] + "/" + ::arg()["socket-dir"];
  82   }
  83 }
  84
  85 int main(int argc, char** argv)
  86 try
  87 {
  88   initArguments(argc, argv);
  89   RecursorControlChannel rccS;
  90   string sockname="pdns_recursor";
  91
  92   if (arg()["config-name"] != "")
  93     sockname+="-"+arg()["config-name"];
  94
  95   if(!arg()["process"].empty())
  96     sockname+="."+arg()["process"];
  97
  98   sockname.append(".controlsocket");
  99
 100   rccS.connect(arg()["socket-dir"], sockname);
 101
 102   const vector<string>&commands=arg().getCommands();
 103   string command;
 104   for(unsigned int i=0; i< commands.size(); ++i) {
 105     if(i>0)
 106       command+=" ";
 107     command+=commands[i];
 108   }
 109   rccS.send(command);
 110   string receive=rccS.recv(0, arg().asNum("timeout"));
 111   if(receive.compare(0, 7, "Unknown") == 0) {
 112     cerr<<receive<<endl;
 113     return 1;
 114   }
 115   cout<<receive;
 116   return 0;
 117 }
 118 catch(PDNSException& ae)
 119 {
 120   cerr<<"Fatal: "<<ae.reason<<"\n";
 121   return 1;
 122 }