Re: [boost] Problems with filesystem library on Linux

From: Beman Dawes (bdawes_at_[hidden])
Date: 2002-08-14 16:12:27

At 02:59 PM 8/14/2002, Jeff Garland wrote:

 >I'm trying to write a program to list a directory using the filesystem 
lib
 >and
 >I'm running into a couple problems.  First, here's the program:
 >
 >#include "boost/filesystem/operations.hpp"
 >#include <iostream>
 >
 >namespace fs = boost::filesystem;
 >
 >int main()
 >{
 >  try {
 >
 >    fs::path start("/home");
                     ^^^^^^^^
Change this to:

      fs::path start("/home", fs::system_specific);
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

 >    fs::directory_iterator end_itr;
 >    fs::directory_iterator dir_itr(start);
 >    for (;dir_itr != end_itr; ++dir_itr) {
 >      std::cout << (dir_itr->file_path()) << std::endl;
 >    }
 >  }
 >  catch(std::exception& e) {
 >    std::cout << e.what() << std::endl;
 >  }
 >
 >  return 0;
 >}
 >
 >The first problem is that the checking code will not construct "/home" as 
a
 >valid path.  This is a result of invalid_chars containing a '/'.  When I
 >remove '/' from the invalid_chars array the construction is allowed to
 >proceed
 >as expected.  Seems like "/home" should be allowed on Unix or 
generically?

See above.  It should definite work with the "system_specific" constructor. 
It is a bug in filesystem code if it doesn't.

 >The second problem is that the program crashes on a ~directory_iterator
 >when it calls to the counted_base destructor which fails in free.  I 
could
 >not reproduce the problem by just constructing the iterators so it must
 >have something to do with the results of operator++.  Any ideas?

No. I've got a Linux box here (or rather the pieces of one that I put 
together when I need to), but haven't tested recent versions on it.  I'm 
planning to re-test before the formal review, but doubt I will get to that 
for a couple of weeks unless the 1.29.0 release goes smoothly.

Sorry, that isn't much help.  If you can get me any more information, maybe 
a bell will ring.  Do make sure you have the latest version from the 
sandbox CVS.

--Beman