apt-pkg/clean.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: clean.cc,v 1.4 2001/02/20 07:03:17 jgg Exp $
   4 /* ######################################################################
   5
   6    Clean - Clean out downloaded directories
   7
   8    ##################################################################### */
   9                                                                         /*}}}*/
  10 // Includes                                                             /*{{{*/
  11 #include<config.h>
  12
  13 #include <apt-pkg/clean.h>
  14 #include <apt-pkg/strutl.h>
  15 #include <apt-pkg/error.h>
  16 #include <apt-pkg/configuration.h>
  17 #include <apt-pkg/aptconfiguration.h>
  18
  19 #include <dirent.h>
  20 #include <sys/stat.h>
  21 #include <unistd.h>
  22
  23 #include <apti18n.h>
  24                                                                         /*}}}*/
  25 // ArchiveCleaner::Go - Perform smart cleanup of the archive            /*{{{*/
  26 // ---------------------------------------------------------------------
  27 /* Scan the directory for files to erase, we check the version information
  28    against our database to see if it is interesting */
  29 bool pkgArchiveCleaner::Go(string Dir,pkgCache &Cache)
  30 {
  31    bool CleanInstalled = _config->FindB("APT::Clean-Installed",true);
  32
  33    DIR *D = opendir(Dir.c_str());
  34    if (D == 0)
  35       return _error->Errno("opendir",_("Unable to read %s"),Dir.c_str());
  36
  37    string StartDir = SafeGetCWD();
  38    if (chdir(Dir.c_str()) != 0)
  39    {
  40       closedir(D);
  41       return _error->Errno("chdir",_("Unable to change to %s"),Dir.c_str());
  42    }
  43
  44    for (struct dirent *Dir = readdir(D); Dir != 0; Dir = readdir(D))
  45    {
  46       // Skip some files..
  47       if (strcmp(Dir->d_name,"lock") == 0 ||
  48           strcmp(Dir->d_name,"partial") == 0 ||
  49           strcmp(Dir->d_name,".") == 0 ||
  50           strcmp(Dir->d_name,"..") == 0)
  51          continue;
  52
  53       struct stat St;
  54       if (stat(Dir->d_name,&St) != 0)
  55       {
  56          chdir(StartDir.c_str());
  57          closedir(D);
  58          return _error->Errno("stat",_("Unable to stat %s."),Dir->d_name);
  59       }
  60
  61       // Grab the package name
  62       const char *I = Dir->d_name;
  63       for (; *I != 0 && *I != '_';I++);
  64       if (*I != '_')
  65          continue;
  66       string Pkg = DeQuoteString(string(Dir->d_name,I-Dir->d_name));
  67
  68       // Grab the version
  69       const char *Start = I + 1;
  70       for (I = Start; *I != 0 && *I != '_';I++);
  71       if (*I != '_')
  72          continue;
  73       string Ver = DeQuoteString(string(Start,I-Start));
  74
  75       // Grab the arch
  76       Start = I + 1;
  77       for (I = Start; *I != 0 && *I != '.' ;I++);
  78       if (*I != '.')
  79          continue;
  80       string const Arch = DeQuoteString(string(Start,I-Start));
  81
  82       if (APT::Configuration::checkArchitecture(Arch) == false)
  83          continue;
  84
  85       // Lookup the package
  86       pkgCache::PkgIterator P = Cache.FindPkg(Pkg);
  87       if (P.end() != true)
  88       {
  89          pkgCache::VerIterator V = P.VersionList();
  90          for (; V.end() == false; ++V)
  91          {
  92             // See if we can fetch this version at all
  93             bool IsFetchable = false;
  94             for (pkgCache::VerFileIterator J = V.FileList();
  95                  J.end() == false; ++J)
  96             {
  97                if (CleanInstalled == true &&
  98                    (J.File()->Flags & pkgCache::Flag::NotSource) != 0)
  99                   continue;
 100                IsFetchable = true;
 101                break;
 102             }
 103
 104             // See if this verison matches the file
 105             if (IsFetchable == true && Ver == V.VerStr())
 106                break;
 107          }
 108
 109          // We found a match, keep the file
 110          if (V.end() == false)
 111             continue;
 112       }
 113
 114       Erase(Dir->d_name,Pkg,Ver,St);
 115    };
 116
 117    chdir(StartDir.c_str());
 118    closedir(D);
 119    return true;
 120 }
 121                                                                         /*}}}*/