methods/copy.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: copy.cc,v 1.8 2004/01/07 20:39:38 mdz Exp $
   4 /* ######################################################################
   5
   6    Copy URI - This method takes a uri like a file: uri and copies it
   7    to the destination file.
   8
   9    ##################################################################### */
  10                                                                         /*}}}*/
  11 // Include Files                                                        /*{{{*/
  12 #include <apt-pkg/fileutl.h>
  13 #include <apt-pkg/acquire-method.h>
  14 #include <apt-pkg/error.h>
  15
  16 #include <sys/stat.h>
  17 #include <utime.h>
  18 #include <unistd.h>
  19 #include <apti18n.h>
  20                                                                         /*}}}*/
  21
  22 class CopyMethod : public pkgAcqMethod
  23 {
  24    virtual bool Fetch(FetchItem *Itm);
  25
  26    public:
  27
  28    CopyMethod() : pkgAcqMethod("1.0",SingleInstance) {};
  29 };
  30
  31 // CopyMethod::Fetch - Fetch a file                                     /*{{{*/
  32 // ---------------------------------------------------------------------
  33 /* */
  34 bool CopyMethod::Fetch(FetchItem *Itm)
  35 {
  36    URI Get = Itm->Uri;
  37    string File = Get.Path;
  38
  39    // Stat the file and send a start message
  40    struct stat Buf;
  41    if (stat(File.c_str(),&Buf) != 0)
  42       return _error->Errno("stat",_("Failed to stat"));
  43
  44    // Forumulate a result and send a start message
  45    FetchResult Res;
  46    Res.Size = Buf.st_size;
  47    Res.Filename = Itm->DestFile;
  48    Res.LastModified = Buf.st_mtime;
  49    Res.IMSHit = false;
  50    URIStart(Res);
  51
  52    // See if the file exists
  53    FileFd From(File,FileFd::ReadOnly);
  54    FileFd To(Itm->DestFile,FileFd::WriteEmpty);
  55    To.EraseOnFailure();
  56    if (_error->PendingError() == true)
  57    {
  58       To.OpFail();
  59       return false;
  60    }
  61
  62    // Copy the file
  63    if (CopyFile(From,To) == false)
  64    {
  65       To.OpFail();
  66       return false;
  67    }
  68
  69    From.Close();
  70    To.Close();
  71
  72    // Transfer the modification times
  73    struct utimbuf TimeBuf;
  74    TimeBuf.actime = Buf.st_atime;
  75    TimeBuf.modtime = Buf.st_mtime;
  76    if (utime(Itm->DestFile.c_str(),&TimeBuf) != 0)
  77    {
  78       To.OpFail();
  79       return _error->Errno("utime",_("Failed to set modification time"));
  80    }
  81
  82    URIDone(Res);
  83    return true;
  84 }
  85                                                                         /*}}}*/
  86
  87 int main()
  88 {
  89    CopyMethod Mth;
  90    return Mth.Run();
  91 }