source/copy.cpp

   1 /* $Id$
   2
   3 This file is part of builder
   4 Copyright © 2006-2007 Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <errno.h>
   9 #include <fstream>
  10 #include <iostream>
  11 #include <msp/path/utils.h>
  12 #include "builder.h"
  13 #include "copy.h"
  14 #include "package.h"
  15
  16 using namespace std;
  17 using namespace Msp;
  18
  19 Copy::Copy(Builder &b, const Package &pkg, const Path::Path &s, const Path::Path &d):
  20         Action(b),
  21         src(s),
  22         dest(d),
  23         worker(0)
  24 {
  25         announce(pkg.get_name(), "COPY", dest[-1]);
  26         if(builder.get_verbose()>=2)
  27                 cout<<s<<" -> "<<d<<'\n';
  28
  29         if(!builder.get_dry_run())
  30                 worker=new Worker(*this);
  31 }
  32
  33 int Copy::check()
  34 {
  35         if(!worker)  // True for dry run
  36         {
  37                 signal_done.emit();
  38                 return 0;
  39         }
  40
  41         if(worker->get_done())
  42         {
  43                 signal_done.emit();
  44                 worker->join();
  45                 return worker->get_error()?1:0;
  46         }
  47
  48         return -1;
  49 }
  50
  51 Copy::~Copy()
  52 {
  53         delete worker;
  54 }
  55
  56 void Copy::Worker::main()
  57 {
  58         Path::mkpath(copy.dest.subpath(0, copy.dest.size()-1), 0755);
  59
  60         // Remove old file.  Not doing this would cause Bad Stuff when installing libraries.
  61         if(unlink(copy.dest.str().c_str())<0 && errno!=ENOENT)
  62         {
  63                 int err=errno;
  64                 cerr<<"Can't unlink "<<copy.dest<<": "<<strerror(err)<<'\n';
  65                 done=error=true;
  66                 return;
  67         }
  68
  69         ifstream in(copy.src.str().c_str());
  70         if(!in)
  71         {
  72                 cerr<<"Can't open "<<copy.src<<" for reading\n";
  73                 done=error=true;
  74                 return;
  75         }
  76
  77         ofstream out(copy.dest.str().c_str());
  78         if(!out)
  79         {
  80                 cerr<<"Can't open "<<copy.dest<<" for writing\n";
  81                 done=error=true;
  82                 return;
  83         }
  84
  85         // Actual transfer loop
  86         char buf[16384];
  87         while(!in.eof())
  88         {
  89                 in.read(buf, sizeof(buf));
  90                 out.write(buf, in.gcount());
  91         }
  92
  93         // Preserve file permissions
  94         struct stat st;
  95         Path::stat(copy.src, st);
  96         chmod(copy.dest.str().c_str(), st.st_mode&0777);
  97
  98         done=true;
  99 }