methods/file.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: file.cc,v 1.4 1998/10/30 07:53:52 jgg Exp $
   4 /* ######################################################################
   5
   6    File URI method for APT
   7
   8    This simply checks that the file specified exists, if so the relevent
   9    information is returned. If a .gz filename is specified then the file
  10    name with .gz removed will also be checked and information about it
  11    will be returned in Alt-*
  12
  13    ##################################################################### */
  14                                                                         /*}}}*/
  15 // Include Files                                                        /*{{{*/
  16 #include <apt-pkg/acquire-method.h>
  17 #include <apt-pkg/error.h>
  18
  19 #include <sys/stat.h>
  20 #include <unistd.h>
  21                                                                         /*}}}*/
  22
  23 class FileMethod : public pkgAcqMethod
  24 {
  25    virtual bool Fetch(string Message,URI Get);
  26
  27    public:
  28
  29    FileMethod() : pkgAcqMethod("1.0",SingleInstance) {};
  30 };
  31
  32 // FileMethod::Fetch - Fetch a file                                     /*{{{*/
  33 // ---------------------------------------------------------------------
  34 /* */
  35 bool FileMethod::Fetch(string Message,URI Get)
  36 {
  37    string File = Get.Path;
  38    FetchResult Res;
  39
  40    // See if the file exists
  41    struct stat Buf;
  42    if (stat(File.c_str(),&Buf) == 0)
  43    {
  44       Res.Size = Buf.st_size;
  45       Res.Filename = File;
  46       Res.LastModified = Buf.st_mtime;
  47       Res.IMSHit = false;
  48       if (LastModified == Buf.st_mtime)
  49          Res.IMSHit = true;
  50    }
  51
  52    // See if we can compute a file without a .gz exentsion
  53    string::size_type Pos = File.rfind(".gz");
  54    if (Pos + 3 == File.length())
  55    {
  56       File = string(File,0,Pos);
  57       if (stat(File.c_str(),&Buf) == 0)
  58       {
  59          FetchResult AltRes;
  60          AltRes.Size = Buf.st_size;
  61          AltRes.Filename = File;
  62          AltRes.LastModified = Buf.st_mtime;
  63          AltRes.IMSHit = false;
  64          if (LastModified == Buf.st_mtime)
  65             AltRes.IMSHit = true;
  66
  67          URIDone(Res,&AltRes);
  68          return true;
  69       }
  70    }
  71
  72    if (Res.Filename.empty() == true)
  73       return _error->Error("File not found");
  74
  75    URIDone(Res);
  76    return true;
  77 }
  78                                                                         /*}}}*/
  79
  80 int main()
  81 {
  82    FileMethod Mth;
  83    return Mth.Run();
  84 }