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