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readdir.cpp
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readdir.cpp
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// GB hacked a bit from http://www.cplusplus.com/forum/unices/3548/
#include <algorithm>
#include <string>
#include <vector>
#include <dirent.h>
#include <sys/types.h>
#include <errno.h> // GB
// read_directory()
// Return an ASCII-sorted vector of filename entries in a given directory.
// If no path is specified, the current working directory is used.
//
// Always check the value of the global 'errno' variable after using this
// function to see if anything went wrong. (It will be zero if all is well.)
//
std::vector <std::string> read_directory( const std::string& path = std::string() )
{
std::vector <std::string> result;
errno = 0;
DIR* dp = opendir( path.empty()? ".": path.c_str() );
if(errno) { perror("read_directory: opendir failed"); return result; } // GB
if( dp ) {
while(true) {
errno = 0;
dirent* de = readdir( dp );
if(errno) { perror("read_directory: readdir failed"); return result; } // GB
if (de == NULL) break;
result.push_back( std::string( de->d_name ) );
}
closedir( dp );
std::sort( result.begin(), result.end() );
}
return result;
}
#include <iostream>
int main(int argc,char*argv[]) // GB - driver
{
std::string folder = argc>1? argv[1]: ".";
std::vector<std::string> files( move( read_directory( folder ) ) );
for(const auto file: files)
std::cout << file << "\n";
}