granicus.if.org Git - icinga2/blob - lib/base/scriptglobal.cpp

   1 /******************************************************************************
   2  * Icinga 2                                                                   *
   3  * Copyright (C) 2012-2018 Icinga Development Team (https://www.icinga.com/)  *
   4  *                                                                            *
   5  * This program is free software; you can redistribute it and/or              *
   6  * modify it under the terms of the GNU General Public License                *
   7  * as published by the Free Software Foundation; either version 2             *
   8  * of the License, or (at your option) any later version.                     *
   9  *                                                                            *
  10  * This program is distributed in the hope that it will be useful,            *
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of             *
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *
  13  * GNU General Public License for more details.                               *
  14  *                                                                            *
  15  * You should have received a copy of the GNU General Public License          *
  16  * along with this program; if not, write to the Free Software Foundation     *
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.             *
  18  ******************************************************************************/
  19
  20 #include "base/scriptglobal.hpp"
  21 #include "base/singleton.hpp"
  22 #include "base/logger.hpp"
  23 #include "base/stdiostream.hpp"
  24 #include "base/netstring.hpp"
  25 #include "base/json.hpp"
  26 #include "base/convert.hpp"
  27 #include "base/objectlock.hpp"
  28 #include "base/exception.hpp"
  29 #include <boost/algorithm/string/split.hpp>
  30 #include <fstream>
  31
  32 using namespace icinga;
  33
  34 Dictionary::Ptr ScriptGlobal::m_Globals = new Dictionary();
  35
  36 Value ScriptGlobal::Get(const String& name, const Value *defaultValue)
  37 {
  38         Value result;
  39
  40         if (!m_Globals->Get(name, &result)) {
  41                 if (defaultValue)
  42                         return *defaultValue;
  43
  44                 BOOST_THROW_EXCEPTION(std::invalid_argument("Tried to access undefined script variable '" + name + "'"));
  45         }
  46
  47         return result;
  48 }
  49
  50 void ScriptGlobal::Set(const String& name, const Value& value)
  51 {
  52         std::vector<String> tokens = name.Split(".");
  53
  54         if (tokens.empty())
  55                 BOOST_THROW_EXCEPTION(std::invalid_argument("Name must not be empty"));
  56
  57         {
  58                 ObjectLock olock(m_Globals);
  59
  60                 Dictionary::Ptr parent = m_Globals;
  61
  62                 for (std::vector<String>::size_type i = 0; i < tokens.size(); i++) {
  63                         const String& token = tokens[i];
  64
  65                         if (i + 1 != tokens.size()) {
  66                                 Value vparent;
  67
  68                                 if (!parent->Get(token, &vparent)) {
  69                                         Dictionary::Ptr dict = new Dictionary();
  70                                         parent->Set(token, dict);
  71                                         parent = dict;
  72                                 } else {
  73                                         parent = vparent;
  74                                 }
  75                         }
  76                 }
  77
  78                 parent->Set(tokens[tokens.size() - 1], value);
  79         }
  80 }
  81
  82 bool ScriptGlobal::Exists(const String& name)
  83 {
  84         return m_Globals->Contains(name);
  85 }
  86
  87 Dictionary::Ptr ScriptGlobal::GetGlobals()
  88 {
  89         return m_Globals;
  90 }
  91
  92 void ScriptGlobal::WriteToFile(const String& filename)
  93 {
  94         Log(LogInformation, "ScriptGlobal")
  95                 << "Dumping variables to file '" << filename << "'";
  96
  97         std::fstream fp;
  98         String tempFilename = Utility::CreateTempFile(filename + ".XXXXXX", 0600, fp);
  99
 100         if (!fp)
 101                 BOOST_THROW_EXCEPTION(std::runtime_error("Could not open '" + tempFilename + "' file"));
 102
 103         StdioStream::Ptr sfp = new StdioStream(&fp, false);
 104
 105         ObjectLock olock(m_Globals);
 106         for (const Dictionary::Pair& kv : m_Globals) {
 107                 Value value = kv.second;
 108
 109                 if (value.IsObject())
 110                         value = Convert::ToString(value);
 111
 112                 Dictionary::Ptr persistentVariable = new Dictionary({
 113                         { "name", kv.first },
 114                         { "value", value }
 115                 });
 116
 117                 String json = JsonEncode(persistentVariable);
 118
 119                 NetString::WriteStringToStream(sfp, json);
 120         }
 121
 122         sfp->Close();
 123
 124         fp.close();
 125
 126 #ifdef _WIN32
 127         _unlink(filename.CStr());
 128 #endif /* _WIN32 */
 129
 130         if (rename(tempFilename.CStr(), filename.CStr()) < 0) {
 131                 BOOST_THROW_EXCEPTION(posix_error()
 132                         << boost::errinfo_api_function("rename")
 133                         << boost::errinfo_errno(errno)
 134                         << boost::errinfo_file_name(tempFilename));
 135         }
 136 }
 137