apt-pkg/init.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: init.cc,v 1.15 2001/02/20 07:03:17 jgg Exp $
   4 /* ######################################################################
   5
   6    Init - Initialize the package library
   7
   8    ##################################################################### */
   9                                                                         /*}}}*/
  10 // Include files                                                        /*{{{*/
  11 #include <apt-pkg/init.h>
  12 #include <apt-pkg/fileutl.h>
  13 #include <apt-pkg/error.h>
  14
  15 #include <apti18n.h>
  16 #include <config.h>
  17 #include <sys/stat.h>
  18                                                                         /*}}}*/
  19
  20 #define Stringfy_(x) # x
  21 #define Stringfy(x)  Stringfy_(x)
  22 const char *pkgVersion = VERSION;
  23 const char *pkgLibVersion = Stringfy(APT_PKG_MAJOR) "."
  24                             Stringfy(APT_PKG_MINOR) "."
  25                             Stringfy(APT_PKG_RELEASE);
  26 const char *pkgCPU = COMMON_CPU;
  27 const char *pkgOS = COMMON_OS;
  28
  29 // pkgInitConfig - Initialize the configuration class                   /*{{{*/
  30 // ---------------------------------------------------------------------
  31 /* Directories are specified in such a way that the FindDir function will
  32    understand them. That is, if they don't start with a / then their parent
  33    is prepended, this allows a fair degree of flexability. */
  34 bool pkgInitConfig(Configuration &Cnf)
  35 {
  36    // General APT things
  37    if (strcmp(COMMON_OS,"linux") == 0 ||
  38        strcmp(COMMON_OS,"unknown") == 0)
  39       Cnf.Set("APT::Architecture",COMMON_CPU);
  40    else
  41       Cnf.Set("APT::Architecture",COMMON_OS "-" COMMON_CPU);
  42    Cnf.Set("Dir","/");
  43
  44    // State
  45    Cnf.Set("Dir::State","var/lib/apt/");
  46
  47    /* Just in case something goes horribly wrong, we can fall back to the
  48       old /var/state paths.. */
  49    struct stat St;
  50    if (stat("/var/lib/apt/.",&St) != 0 &&
  51        stat("/var/state/apt/.",&St) == 0)
  52       Cnf.Set("Dir::State","var/state/apt/");
  53
  54    Cnf.Set("Dir::State::lists","lists/");
  55    Cnf.Set("Dir::State::cdroms","cdroms.list");
  56
  57    // Cache
  58    Cnf.Set("Dir::Cache","var/cache/apt/");
  59    Cnf.Set("Dir::Cache::archives","archives/");
  60    Cnf.Set("Dir::Cache::srcpkgcache","srcpkgcache.bin");
  61    Cnf.Set("Dir::Cache::pkgcache","pkgcache.bin");
  62
  63    // Configuration
  64    Cnf.Set("Dir::Etc","etc/apt/");
  65    Cnf.Set("Dir::Etc::sourcelist","sources.list");
  66    Cnf.Set("Dir::Etc::main","apt.conf");
  67    Cnf.Set("Dir::Etc::parts","apt.conf.d");
  68    Cnf.Set("Dir::Etc::preferences","preferences");
  69    Cnf.Set("Dir::Bin::methods","/usr/lib/apt/methods");
  70
  71    bool Res = true;
  72
  73    // Read an alternate config file
  74    const char *Cfg = getenv("APT_CONFIG");
  75    if (Cfg != 0 && FileExists(Cfg) == true)
  76       Res &= ReadConfigFile(Cnf,Cfg);
  77
  78    // Read the configuration parts dir
  79    string Parts = Cnf.FindDir("Dir::Etc::parts");
  80    if (FileExists(Parts) == true)
  81       Res &= ReadConfigDir(Cnf,Parts);
  82
  83    // Read the main config file
  84    string FName = Cnf.FindFile("Dir::Etc::main");
  85    if (FileExists(FName) == true)
  86       Res &= ReadConfigFile(Cnf,FName);
  87
  88    if (Res == false)
  89       return false;
  90
  91    if (Cnf.FindB("Debug::pkgInitConfig",false) == true)
  92       Cnf.Dump();
  93
  94    return true;
  95 }
  96                                                                         /*}}}*/
  97 // pkgInitSystem - Initialize the _system calss                         /*{{{*/
  98 // ---------------------------------------------------------------------
  99 /* */
 100 bool pkgInitSystem(Configuration &Cnf,pkgSystem *&Sys)
 101 {
 102    Sys = 0;
 103    string Label = Cnf.Find("Apt::System","");
 104    if (Label.empty() == false)
 105    {
 106       Sys = pkgSystem::GetSystem(Label.c_str());
 107       if (Sys == 0)
 108          return _error->Error(_("Packaging system '%s' is not supported"),Label.c_str());
 109    }
 110    else
 111    {
 112       signed MaxScore = 0;
 113       for (unsigned I = 0; I != pkgSystem::GlobalListLen; I++)
 114       {
 115          signed Score = pkgSystem::GlobalList[I]->Score(Cnf);
 116          if (Score > MaxScore)
 117          {
 118             MaxScore = Score;
 119             Sys = pkgSystem::GlobalList[I];
 120          }
 121       }
 122
 123       if (Sys == 0)
 124          return _error->Error(_("Unable to determine a suitable system type"));
 125    }
 126
 127    return Sys->Initialize(Cnf);
 128 }
 129                                                                         /*}}}*/