pdns/rec_control.cc

   1 /*
   2  * This file is part of PowerDNS or dnsdist.
   3  * Copyright -- PowerDNS.COM B.V. and its contributors
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * In addition, for the avoidance of any doubt, permission is granted to
  10  * link this program with OpenSSL and to (re)distribute the binaries
  11  * produced as the result of such linking.
  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 Street, 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+"/pdns-recursor 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   arg().laxFile(configname.c_str());
  70
  71   arg().laxParse(argc,argv);   // make sure the commandline wins
  72
  73   if (::arg()["socket-dir"].empty()) {
  74     if (::arg()["chroot"].empty())
  75       ::arg().set("socket-dir") = std::string(LOCALSTATEDIR) + "/pdns-recursor";
  76     else
  77       ::arg().set("socket-dir") = ::arg()["chroot"] + "/";
  78   } else if (!::arg()["chroot"].empty()) {
  79     ::arg().set("socket-dir") = ::arg()["chroot"] + "/" + ::arg()["socket-dir"];
  80   }
  81 }
  82
  83 int main(int argc, char** argv)
  84 try
  85 {
  86   initArguments(argc, argv);
  87   RecursorControlChannel rccS;
  88   string sockname="pdns_recursor";
  89
  90   if (arg()["config-name"] != "")
  91     sockname+="-"+arg()["config-name"];
  92
  93   if(!arg()["process"].empty())
  94     sockname+="."+arg()["process"];
  95
  96   sockname.append(".controlsocket");
  97
  98   rccS.connect(arg()["socket-dir"], sockname);
  99
 100   const vector<string>&commands=arg().getCommands();
 101   string command;
 102   for(unsigned int i=0; i< commands.size(); ++i) {
 103     if(i>0)
 104       command+=" ";
 105     command+=commands[i];
 106   }
 107   rccS.send(command, nullptr, arg().asNum("timeout"));
 108   string receive=rccS.recv(0, arg().asNum("timeout"));
 109   if(receive.compare(0, 7, "Unknown") == 0) {
 110     cerr<<receive<<endl;
 111     return 1;
 112   }
 113   cout<<receive;
 114   return 0;
 115 }
 116 catch(PDNSException& ae)
 117 {
 118   cerr<<"Fatal: "<<ae.reason<<"\n";
 119   return 1;
 120 }