src/beacon.cxx

   1 //
   2 // Copyright (C) 2008 Francesco Salvestrini
   3 //
   4 // This program is free software; you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation; either version 2 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // This program is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License along
  15 // with this program; if not, write to the Free Software Foundation, Inc.,
  16 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17 //
  18
  19 #include "config.h"
  20
  21 #include <unistd.h>
  22 #include <getopt.h>
  23 #include <cstdlib>
  24 #include <string>
  25 #include <vector>
  26 #include <iostream>
  27
  28 #include "misc/debug.h"
  29 #include "misc/constant.h"
  30 #include "misc/environment.h"
  31 #include "misc/utility.h"
  32 #include "vm/vm.h"
  33 #ifdef HAVE_LUA
  34 #include "vm/lua.h"
  35 #endif
  36 #include "net/uuid.h"
  37
  38 #define PROGRAM_NAME "beacon"
  39
  40 void version(void)
  41 {
  42         std::cout
  43                 << PROGRAM_NAME << " (" << PACKAGE_NAME  << ") " << PACKAGE_VERSION <<                    std::endl
  44                 <<                                                                                   std::endl
  45                 << "Copyright (C) 2008 Francesco Salvestrini" <<                                     std::endl
  46                 <<                                                                                   std::endl
  47                 << "This is free software.  You may redistribute copies of it under the terms of" << std::endl
  48                 << "the GNU General Public License <http://www.gnu.org/licenses/gpl.html>." <<       std::endl
  49                 << "There is NO WARRANTY, to the extent permitted by law." <<                        std::endl;
  50
  51 }
  52
  53 void help(void)
  54 {
  55         std::cout
  56                 << "Usage: " << PROGRAM_NAME << " [OPTION]... "<<                std::endl
  57                 <<                                                          std::endl
  58                 << "Options: " <<                                           std::endl
  59                 << "  -m, --max-mem     maximum usable memory (in KB)" <<   std::endl
  60                 << "  -j, --max-jobs    maximum number of parallel jobs" << std::endl
  61                 << "  -d, --debug       enable debugging traces" <<         std::endl
  62                 << "  -h, --help        print this help, then exit" <<      std::endl
  63                 << "  -V, --version     print version number, then exit" << std::endl
  64                 <<                                                          std::endl
  65                 << "Report bugs to <" << PACKAGE_BUGREPORT << ">" <<        std::endl;
  66 }
  67
  68 void hint(const std::string & message)
  69 {
  70         BUG_ON(message.size() == 0);
  71
  72         std::cout
  73                 << message <<                                            std::endl
  74                 << "Try `" << PROGRAM_NAME << " -h' for more information." << std::endl;
  75 }
  76
  77 int main(int argc, char * argv[])
  78 {
  79         TR_CONFIG_LVL(TR_LVL_DEFAULT);
  80         TR_CONFIG_PFX(PROGRAM_NAME);
  81
  82         try {
  83                 int max_mem  = 1; // XXX FIXME: Change to a costant
  84                 int max_jobs = 1; // XXX FIXME: Change to a costant
  85
  86                 int c;
  87                 //int digit_optind = 0;
  88                 while (1) {
  89                         //int this_option_optind = optind ? optind : 1;
  90                         int option_index       = 0;
  91
  92                         static struct option long_options[] = {
  93                                 { "max-mem",  1, 0, 'm' },
  94                                 { "max-jobs", 1, 0, 'j' },
  95                                 { "debug",    0, 0, 'd' },
  96                                 { "version",  0, 0, 'V' },
  97                                 { "help",     0, 0, 'h' },
  98                                 { 0,          0, 0, 0   }
  99                         };
 100
 101                         c = getopt_long(argc, argv, "m:j:dVh",
 102                                         long_options, &option_index);
 103                         if (c == -1) {
 104                                 break;
 105                         }
 106
 107                         switch (c) {
 108                                 case 'm':
 109                                         max_mem = atoi(optarg);
 110                                         if (max_mem <= 0) {
 111                                                 hint("Wrong max memory value");
 112                                                 return 1;
 113                                         }
 114
 115                                         //
 116                                         // XXX FIXME:
 117                                         //     The current solution is ugly.
 118                                         //     Add modifiers (KB, MB, GB) to
 119                                         //     this option in order to use
 120                                         //     different memory granularity.
 121                                         //
 122                                         max_mem = max_mem * 1024;
 123                                         break;
 124                                 case 'j':
 125                                         max_jobs = atoi(optarg);
 126                                         if (max_jobs <= 0) {
 127                                                 hint("Wrong max jobs value");
 128                                                 return 1;
 129                                         }
 130                                         break;
 131                                 case 'd':
 132                                         trace_level = TR_LVL_DEBUG;
 133                                         break;
 134                                 case 'V':
 135                                         version();
 136                                         return 0;
 137                                 case 'h':
 138                                         help();
 139                                         return 0;
 140                                 case '?':
 141                                         hint("Unrecognized option");
 142                                         return 1;
 143
 144                                 default:
 145                                         BUG();
 146                                         return 1;
 147                         }
 148                 }
 149
 150                 // XXX FIXME: Add options related checks here
 151
 152                 BUG_ON(max_mem <= 0);
 153                 BUG_ON(max_jobs <= 0);
 154
 155                 size_t mem_for_vm = max_mem / max_jobs;
 156
 157                 // Build configuration file path
 158                 std::string homedir = Environment::get("HOME");
 159                 std::string confdir =
 160                         homedir +
 161                         std::string("/") +
 162                         std::string(".") +
 163                         std::string(PACKAGE_TARNAME);
 164
 165                 // Dump (acquired and derived) infos
 166                 TR_DBG("Max mem:                 '%d'\n", max_mem);
 167                 TR_DBG("Max jobs                 '%d'\n", max_jobs);
 168                 TR_DBG("Mem for VM               '%d'\n", mem_for_vm);
 169                 TR_DBG("Home directory:          '%s'\n", homedir.c_str());
 170                 TR_DBG("Configuration directory: '%s'\n", confdir.c_str());
 171
 172                 if (mem_for_vm < MIN_MEM_FOR_VM) {
 173                         TR_CRT("Memory for single VM is too small "
 174                                "(%d byte%s each, %d minimum)\n",
 175                                mem_for_vm, PLURAL(mem_for_vm), MIN_MEM_FOR_VM);
 176                         return 1;
 177                 }
 178
 179                 TR_DBG("Building %d VM%s\n", max_jobs, PLURAL(max_jobs));
 180
 181                 std::vector<VM::VM *> vms;
 182                 vms.resize(max_jobs);
 183
 184                 std::vector<VM::VM *>::iterator iter;
 185                 for (iter = vms.begin(); iter != vms.end(); iter++) {
 186                         try {
 187 #ifdef HAVE_LUA
 188                                 (*iter) = new VM::Lua(mem_for_vm);
 189 #endif
 190                         } catch (...) {
 191                                 TR_CRT("Cannot create VM\n");
 192                                 return 1;
 193                         }
 194                         TR_DBG("VM %p initialized\n", (*iter));
 195                 }
 196
 197                 size_t slack = max_mem - max_jobs * mem_for_vm;
 198                 TR_DBG("Memory slack is %d byte%s\n", slack, PLURAL(slack));
 199
 200                 // Do the main loop here
 201                 try {
 202                         std::string t1("550e8400-e29b-41d4-a716-123456782122");
 203                         std::string t2;
 204
 205                         std::cout << t1 << std::endl;
 206
 207                         Net::UUID uuid(t1);
 208
 209                         t2 = std::string(uuid);
 210
 211                         std::cout << t2 << std::endl;
 212
 213                         BUG_ON(t1 != t2);
 214
 215                 } catch (std::exception & e) {
 216                         TR_DBG("Got exception '%s'\n", e.what());
 217                         throw e;
 218                 }
 219                 MISSING_CODE();
 220         } catch (...) {
 221                 BUG();
 222         }
 223
 224         return 0;
 225 }