Re: [Boost-users] questions about recursing a directory tree

OK, this is the easiest example which produces the "access is denied" error, I can come up with: int main() { fs::recursive_directory_iterator it_end; fs::recursive_directory_iterator it_dir("e:\\"); for ( ; it_dir != it_end; ++it_dir ) { //something here } } Can someone tell me any solution which would catch a "access is denied" kind of error _inside_ the for loop? For every other error it works if I just do a try-catch _inside_ the for loop, but a not accessible directory produces error outside the loop? Or if it's not possible to catch the error inside, how could I start the for cycle again after it has been caught? Zsolt On Tue, Nov 23, 2010 at 12:48 PM, Zsolt Ero wrote:

OK, I figured out my way, it seems that I could solve most of the problems. My big problem now is that the recursive_directory_iterator goes through a file which has a really long name. I think it's more than 256 characters. It says:

boost::filesystem::last_write_time: The system cannot find the path specified:

Is there a fix or something for boost to handle more than 256 characters in windows path? I am using MSVC2010 + latest Boostpro installer.

Zsolt

p.s. so far here is my code. If you have any idea about what I am doing wrong, please don't hesitate to comment:

#define BOOST_FILESYSTEM_VERSION 3

#include "boost/filesystem.hpp" #include <iostream> #include <ctime>

using namespace std; namespace fs = boost::filesystem;

int main() {        fs::recursive_directory_iterator it_end;        fs::recursive_directory_iterator it_dir("e:\\");        fs::path p;

       time_t oldest( time(NULL) );        time_t newest(0);

       try {                for ( ; it_dir != it_end; ++it_dir ) {                        p = *it_dir;                        try {                                time_t t( last_write_time(p) );                                if (tnewest) newest=t;                                //if (fs::is_directory(p)) cout << (p) << " " << t << endl;                        }

                       catch (const fs::filesystem_error& ex) {                                cout << "\n" << ex.what() << "\n";                        }                }        }

       catch (const fs::filesystem_error& ex) {                cout << "\n" << ex.what() << "\n";        }

       cout << "\nOldest: " << ctime(&oldest);        cout << "Newest: " << ctime(&newest) << endl;

       return 0; }