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 #include <apt-pkg/fileutl.h>
  19 #include <apt-pkg/pkgcache.h>
  20 #include <apt-pkg/cacheiterators.h>
  21
  22 #include <string>
  23 #include <string.h>
  24 #include <dirent.h>
  25 #include <sys/stat.h>
  26 #include <unistd.h>
  27
  28 #include <apti18n.h>
  29                                                                         /*}}}*/
  30 // ArchiveCleaner::Go - Perform smart cleanup of the archive            /*{{{*/
  31 // ---------------------------------------------------------------------
  32 /* Scan the directory for files to erase, we check the version information
  33    against our database to see if it is interesting */
  34 bool pkgArchiveCleaner::Go(std::string Dir,pkgCache &Cache)
  35 {
  36    bool CleanInstalled = _config->FindB("APT::Clean-Installed",true);
  37
  38    DIR *D = opendir(Dir.c_str());
  39    if (D == 0)
  40       return _error->Errno("opendir",_("Unable to read %s"),Dir.c_str());
  41
  42    std::string StartDir = SafeGetCWD();
  43    if (chdir(Dir.c_str()) != 0)
  44    {
  45       closedir(D);
  46       return _error->Errno("chdir",_("Unable to change to %s"),Dir.c_str());
  47    }
  48
  49    for (struct dirent *Dir = readdir(D); Dir != 0; Dir = readdir(D))
  50    {
  51       // Skip some files..
  52       if (strcmp(Dir->d_name,"lock") == 0 ||
  53           strcmp(Dir->d_name,"partial") == 0 ||
  54           strcmp(Dir->d_name,".") == 0 ||
  55           strcmp(Dir->d_name,"..") == 0)
  56          continue;
  57
  58       struct stat St;
  59       if (stat(Dir->d_name,&St) != 0)
  60       {
  61          _error->Errno("stat",_("Unable to stat %s."),Dir->d_name);
  62          closedir(D);
  63          if (chdir(StartDir.c_str()) != 0)
  64             return _error->Errno("chdir", _("Unable to change to %s"), StartDir.c_str());
  65          return false;
  66       }
  67
  68       // Grab the package name
  69       const char *I = Dir->d_name;
  70       for (; *I != 0 && *I != '_';I++);
  71       if (*I != '_')
  72          continue;
  73       std::string Pkg = DeQuoteString(std::string(Dir->d_name,I-Dir->d_name));
  74
  75       // Grab the version
  76       const char *Start = I + 1;
  77       for (I = Start; *I != 0 && *I != '_';I++);
  78       if (*I != '_')
  79          continue;
  80       std::string Ver = DeQuoteString(std::string(Start,I-Start));
  81
  82       // Grab the arch
  83       Start = I + 1;
  84       for (I = Start; *I != 0 && *I != '.' ;I++);
  85       if (*I != '.')
  86          continue;
  87       std::string const Arch = DeQuoteString(std::string(Start,I-Start));
  88
  89       // ignore packages of unconfigured architectures
  90       if (APT::Configuration::checkArchitecture(Arch) == false)
  91          continue;
  92
  93       // Lookup the package
  94       pkgCache::PkgIterator P = Cache.FindPkg(Pkg, Arch);
  95       if (P.end() != true)
  96       {
  97          pkgCache::VerIterator V = P.VersionList();
  98          for (; V.end() == false; ++V)
  99          {
 100             // See if we can fetch this version at all
 101             bool IsFetchable = false;
 102             for (pkgCache::VerFileIterator J = V.FileList();
 103                  J.end() == false; ++J)
 104             {
 105                if (CleanInstalled == true &&
 106                    (J.File()->Flags & pkgCache::Flag::NotSource) != 0)
 107                   continue;
 108                IsFetchable = true;
 109                break;
 110             }
 111
 112             // See if this version matches the file
 113             if (IsFetchable == true && Ver == V.VerStr())
 114                break;
 115          }
 116
 117          // We found a match, keep the file
 118          if (V.end() == false)
 119             continue;
 120       }
 121
 122       Erase(Dir->d_name,Pkg,Ver,St);
 123    };
 124
 125    closedir(D);
 126    if (chdir(StartDir.c_str()) != 0)
 127       return _error->Errno("chdir", _("Unable to change to %s"), StartDir.c_str());
 128    return true;
 129 }
 130                                                                         /*}}}*/