apt-pkg/clean.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: clean.cc,v 1.1 1999/02/01 08:11:57 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
  19 #include <dirent.h>
  20 #include <sys/stat.h>
  21 #include <unistd.h>
  22                                                                         /*}}}*/
  23
  24 // ArchiveCleaner::Go - Perform smart cleanup of the archive            /*{{{*/
  25 // ---------------------------------------------------------------------
  26 /* Scan the directory for files to erase, we check the version information
  27    against our database to see if it is interesting */
  28 bool pkgArchiveCleaner::Go(string Dir,pkgCache &Cache)
  29 {
  30    DIR *D = opendir(Dir.c_str());
  31    if (D == 0)
  32       return _error->Errno("opendir","Unable to read %s",Dir.c_str());
  33
  34    string StartDir = SafeGetCWD();
  35    if (chdir(Dir.c_str()) != 0)
  36    {
  37       closedir(D);
  38       return _error->Errno("chdir","Unable to change to ",Dir.c_str());
  39    }
  40
  41    for (struct dirent *Dir = readdir(D); Dir != 0; Dir = readdir(D))
  42    {
  43       // Skip some files..
  44       if (strcmp(Dir->d_name,"lock") == 0 ||
  45           strcmp(Dir->d_name,"partial") == 0 ||
  46           strcmp(Dir->d_name,".") == 0 ||
  47           strcmp(Dir->d_name,"..") == 0)
  48          continue;
  49
  50       struct stat St;
  51       if (stat(Dir->d_name,&St) != 0)
  52          return _error->Errno("stat","Unable to stat %s.",Dir->d_name);
  53
  54       // Grab the package name
  55       const char *I = Dir->d_name;
  56       for (; *I != 0 && *I != '_';I++);
  57       if (*I != '_')
  58          continue;
  59       string Pkg = DeQuoteString(string(Dir->d_name,I-Dir->d_name));
  60
  61       // Grab the version
  62       const char *Start = I + 1;
  63       for (I = Start; *I != 0 && *I != '_';I++);
  64       if (*I != '_')
  65          continue;
  66       string Ver = DeQuoteString(string(Start,I-Start));
  67
  68       // Grab the arch
  69       Start = I + 1;
  70       for (I = Start; *I != 0 && *I != '.' ;I++);
  71       if (*I != '.')
  72          continue;
  73       string Arch = DeQuoteString(string(Start,I-Start));
  74
  75       // Lookup the package
  76       pkgCache::PkgIterator P = Cache.FindPkg(Pkg);
  77       if (P.end() != true)
  78       {
  79          pkgCache::VerIterator V = P.VersionList();
  80          for (; V.end() == false; V++)
  81          {
  82             // See if we can fetch this version at all
  83             bool IsFetchable = false;
  84             for (pkgCache::VerFileIterator J = V.FileList();
  85                  J.end() == false; J++)
  86             {
  87                if ((J.File()->Flags & pkgCache::Flag::NotSource) != 0)
  88                   continue;
  89                IsFetchable = true;
  90                break;
  91             }
  92
  93             // See if this verison matches the file
  94             if (IsFetchable == true && Ver == V.VerStr())
  95                break;
  96          }
  97
  98          // We found a match, keep the file
  99          if (V.end() == false)
 100             continue;
 101       }
 102
 103       Erase(Dir->d_name,Pkg,Ver,St);
 104       unlink(Dir->d_name);
 105    };
 106
 107    chdir(StartDir.c_str());
 108    closedir(D);
 109    return true;
 110 }
 111                                                                         /*}}}*/