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 ArgvMap &arg()
  33 {
  34   static ArgvMap arg;
  35   return arg;
  36 }
  37
  38 static void initArguments(int argc, char** argv)
  39 {
  40   arg().set("config-dir","Location of configuration directory (recursor.conf)")=SYSCONFDIR;
  41
  42   arg().set("socket-dir",string("Where the controlsocket will live, ")+LOCALSTATEDIR+" when unset and not chrooted" )="";
  43   arg().set("chroot","switch to chroot jail")="";
  44   arg().set("process","When controlling multiple recursors, the target process number")="";
  45   arg().set("timeout", "Number of seconds to wait for the recursor to respond")="5";
  46   arg().set("config-name","Name of this virtual configuration - will rename the binary image")="";
  47   arg().setCmd("help","Provide this helpful message");
  48   arg().setCmd("version","Show the version of this program");
  49
  50   arg().laxParse(argc,argv);
  51   if(arg().mustDo("help") || arg().getCommands().empty()) {
  52     cout<<"syntax: rec_control [options] command, options as below: "<<endl<<endl;
  53     cout<<arg().helpstring(arg()["help"])<<endl;
  54     cout<<"In addition, 'rec_control help' can be used to retrieve a list\nof available commands from PowerDNS"<<endl;
  55     exit(arg().mustDo("help") ? 0 : 99);
  56   }
  57
  58   if(arg().mustDo("version")) {
  59     cout<<"rec_control version "<<VERSION<<endl;
  60     exit(0);
  61   }
  62
  63   string configname=::arg()["config-dir"]+"/recursor.conf";
  64   if (::arg()["config-name"] != "")
  65     configname=::arg()["config-dir"]+"/recursor-"+::arg()["config-name"]+".conf";
  66
  67   cleanSlashes(configname);
  68
  69   if(!::arg().preParseFile(configname.c_str(), "socket-dir", ""))
  70     cerr<<"Warning: unable to parse configuration file '"<<configname<<"'"<<endl;
  71   if(!::arg().preParseFile(configname.c_str(), "chroot", ""))
  72     cerr<<"Warning: unable to parse configuration file '"<<configname<<"'"<<endl;
  73
  74   arg().laxParse(argc,argv);   // make sure the commandline wins
  75
  76   if (::arg()["socket-dir"].empty()) {
  77     if (::arg()["chroot"].empty())
  78       ::arg().set("socket-dir") = LOCALSTATEDIR;
  79     else
  80       ::arg().set("socket-dir") = ::arg()["chroot"] + "/";
  81   } else if (!::arg()["chroot"].empty()) {
  82     ::arg().set("socket-dir") = ::arg()["chroot"] + "/" + ::arg()["socket-dir"];
  83   }
  84 }
  85
  86 int main(int argc, char** argv)
  87 try
  88 {
  89   initArguments(argc, argv);
  90   RecursorControlChannel rccS;
  91   string sockname="pdns_recursor";
  92
  93   if (arg()["config-name"] != "")
  94     sockname+="-"+arg()["config-name"];
  95
  96   if(!arg()["process"].empty())
  97     sockname+="."+arg()["process"];
  98
  99   sockname.append(".controlsocket");
 100
 101   rccS.connect(arg()["socket-dir"], sockname);
 102
 103   const vector<string>&commands=arg().getCommands();
 104   string command;
 105   for(unsigned int i=0; i< commands.size(); ++i) {
 106     if(i>0)
 107       command+=" ";
 108     command+=commands[i];
 109   }
 110   rccS.send(command);
 111   string receive=rccS.recv(0, arg().asNum("timeout"));
 112   if(receive.compare(0, 7, "Unknown") == 0) {
 113     cerr<<receive<<endl;
 114     return 1;
 115   }
 116   cout<<receive;
 117   return 0;
 118 }
 119 catch(PDNSException& ae)
 120 {
 121   cerr<<"Fatal: "<<ae.reason<<"\n";
 122   return 1;
 123 }