apt-pkg/clean.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: clean.cc,v 1.3 1999/10/03 21:09:27 jgg Exp $
   4 /* ######################################################################
   5
   6    Clean - Clean out downloaded directories
   7
   8    ##################################################################### */
   9                                                                         /*}}}*/
  10 // Includes                                                             /*{{{*/
  11 #ifdef __GNUG__
  12 #pragma implementation "apt-pkg/clean.h"
  13 #endif
  14
  15 #include <apt-pkg/clean.h>
  16 #include <apt-pkg/strutl.h>
  17 #include <apt-pkg/error.h>
  18 #include <apt-pkg/configuration.h>
  19
  20 #include <dirent.h>
  21 #include <sys/stat.h>
  22 #include <unistd.h>
  23                                                                         /*}}}*/
  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 ",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          return _error->Errno("stat","Unable to stat %s.",Dir->d_name);
  56
  57       // Grab the package name
  58       const char *I = Dir->d_name;
  59       for (; *I != 0 && *I != '_';I++);
  60       if (*I != '_')
  61          continue;
  62       string Pkg = DeQuoteString(string(Dir->d_name,I-Dir->d_name));
  63
  64       // Grab the version
  65       const char *Start = I + 1;
  66       for (I = Start; *I != 0 && *I != '_';I++);
  67       if (*I != '_')
  68          continue;
  69       string Ver = DeQuoteString(string(Start,I-Start));
  70
  71       // Grab the arch
  72       Start = I + 1;
  73       for (I = Start; *I != 0 && *I != '.' ;I++);
  74       if (*I != '.')
  75          continue;
  76       string Arch = DeQuoteString(string(Start,I-Start));
  77
  78       // Lookup the package
  79       pkgCache::PkgIterator P = Cache.FindPkg(Pkg);
  80       if (P.end() != true)
  81       {
  82          pkgCache::VerIterator V = P.VersionList();
  83          for (; V.end() == false; V++)
  84          {
  85             // See if we can fetch this version at all
  86             bool IsFetchable = false;
  87             for (pkgCache::VerFileIterator J = V.FileList();
  88                  J.end() == false; J++)
  89             {
  90                if (CleanInstalled == true &&
  91                    (J.File()->Flags & pkgCache::Flag::NotSource) != 0)
  92                   continue;
  93                IsFetchable = true;
  94                break;
  95             }
  96
  97             // See if this verison matches the file
  98             if (IsFetchable == true && Ver == V.VerStr())
  99                break;
 100          }
 101
 102          // We found a match, keep the file
 103          if (V.end() == false)
 104             continue;
 105       }
 106
 107       Erase(Dir->d_name,Pkg,Ver,St);
 108    };
 109
 110    chdir(StartDir.c_str());
 111    closedir(D);
 112    return true;
 113 }
 114                                                                         /*}}}*/