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