【发布时间】：2015-12-23 20:03:18
【问题描述】：
我正在尝试编写一个脚本来递归扫描磁盘并返回目录、文件的总数并显示找到的最大文件。 我知道在 StackOverflow 或网络上可以找到很多信息，但是到目前为止我发现的所有示例似乎都存在真正递归扫描磁盘的问题。 下面的脚本使用 FindFile 和 FindNextFile 函数来扫描文件。如果文件属性返回该函数找到了一个目录，它会将名称写入一个列表以供稍后搜索。搜索当前目录后，脚本获取列表的第一项（要扫描的目录），从列表中删除该项目并扫描此目录。
我的问题是扫描了几百个目录和子目录后，程序以错误结束
Unhandled exception at ..... (ntdll.dll) in File Lister 6.0.exe: .....: Stack overflow
或
Unhandled exception at ..... (ntdll.dll) in File Lister 6.0.exe: ......: Access violation writing location 0x00f30fe8.
但随后扫描的目录永远不会相同。
我一直在尝试解决这个问题，但找不到明确的原因。 因此，如果有人可以提供帮助，我将不胜感激
下面是我的代码。我知道它看起来很新手，对此我深表歉意
#include <windows.h>
#include <iostream>
#include <fstream>
#include <conio.h>
#include <ctype.h>
#include <string>
#include <string.h>
#include <stdio.h>
#include <direct.h>
#include <list>
using namespace std;
list <string> myList;
std::list<string>::iterator it;
int siZe;
int siZekB;
bool bSearchSubdirectories=true;
HANDLE handle;
LPCTSTR strPattern;
std::string temp;
std::string temp1;
std::string temp2;
std::string temp3;
WIN32_FIND_DATA search_data;
int DIRPlace;
int MaxDir=400000000;
int telDIR=1;
int telFILES=1;
double LargestFile=0;
string LargestFileName;
string SDir;
std::string string_to_hex(const std::string& input)
{
static const char* const lut = "0123456789ABCDEF";
size_t len = input.length();
std::string output;
output.reserve(2 * len);
for (size_t i = 0; i < len; ++i)
{
const unsigned char c = input[i];
output.push_back(lut[c >> 4]);
output.push_back(lut[c & 15]);
}
return output;
}
int SearchDirectory(string FileSearch ,string refvecFiles,
bool bSearchSubdirectories)
{
WIN32_FIND_DATA search_data;
memset(&search_data, 0, sizeof(WIN32_FIND_DATA));
HANDLE handle = FindFirstFile((refvecFiles+FileSearch).c_str(), &search_data);
temp = refvecFiles;
while(handle != INVALID_HANDLE_VALUE) {
do{
if (search_data.cFileName[0]!='.'){
temp2=search_data.dwFileAttributes;
temp3=string_to_hex(temp2);
DIRPlace=strlen(temp3.c_str())-1;
switch (temp3[DIRPlace-1])
{
case '1': //Directory
temp = refvecFiles;
temp1=search_data.cFileName;
temp2=search_data.dwFileAttributes;
myList.push_back(temp+temp1);
telDIR++;
break;
default: //Other types (Files etc)
siZe=(search_data.nFileSizeHigh * (MAXDWORD+1)) + search_data.nFileSizeLow;
siZekB=((search_data.nFileSizeHigh * (MAXDWORD+1)) + search_data.nFileSizeLow)/1024;
temp = refvecFiles;
temp1=search_data.cFileName;
temp2=search_data.dwFileAttributes;
if (siZekB>LargestFile){
LargestFile=siZekB;
LargestFileName=temp.substr(0, temp.size()) + "\\" + temp1;
}
telFILES++;
break;
}
}
}while (FindNextFile(handle, &search_data) != FALSE && telDIR<MaxDir);
string line,SearD, LineFiller,FrontString, BackString;
it=myList.begin();
SearD=*it+"\\\\";
myList.remove(*it);
if (SearD.length()>60)
{
FrontString=SearD.substr(0,10);
BackString=SearD.substr(SearD.length()-44);
LineFiller="......";
FrontString=FrontString+LineFiller+BackString;
}else{
FrontString=SearD;
}
cout<<"Exploring: "<<"\r";
cout<<"Exploring: "<<FrontString<<"\r\r";
SearchDirectory("\\*",SearD, false);
}
FindClose(handle);
return 0;
}
int main(int argc, char* argv[])
{
std::cout<< "Enter directory to be searched: ";
getline(cin,SDir);
std::cout<< "\n";
try{
SearchDirectory("\\*",SDir, false);
}catch (int e)
{
cout << "An exception occurred. Exception Nr. " << e << '\n';
}
std::cout<< "\n"<<"\n";
std::cout<<"Directories found: "<< telDIR<< "\n";
std::cout<<"Files found: "<< telFILES<< "\n";
std::cout<<"Largest File: "<<LargestFileName << " ("<< LargestFile << " kB)"<<"\n";
std::cout<<"press any key";
getch();
}
编辑：下面是调试器调用堆栈的快照
> File Lister 6.0.exe!std::operator<<<std::char_traits<char> >(std::basic_ostream<char,std::char_traits<char> > & _Ostr={...}, const char * _Val=0x000d51c8) Line 791 + 0x20 bytes C++
File Lister 6.0.exe!SearchDirectory(std::basic_string<char,std::char_traits<char>,std::allocator<char> > FileSearch="\*", std::basic_string<char,std::char_traits<char>,std::allocator<char> > refvecFiles="c:\\boost\\numeric\\interval\\", bool bSearchSubdirectories=false) Line 110 + 0x16 bytes C++
File Lister 6.0.exe!SearchDirectory(std::basic_string<char,std::char_traits<char>,std::allocator<char> > FileSearch="\*", std::basic_string<char,std::char_traits<char>,std::allocator<char> > refvecFiles="c:\\boost\\numeric\\conversion\\", bool bSearchSubdirectories=false) Line 113 C++
File Lister 6.0.exe!SearchDirectory(std::basic_string<char,std::char_traits<char>,std::allocator<char> > FileSearch="\*", std::basic_string<char,std::char_traits<char>,std::allocator<char> > refvecFiles="c:\\boost\\multi_index\\detail\\", bool bSearchSubdirectories=false) Line 113 C++
File Lister 6.0.exe!SearchDirectory(std::basic_string<char,std::char_traits<char>,std::allocator<char> > FileSearch="\*", std::basic_string<char,std::char_traits<char>,std::allocator<char> > refvecFiles="c:\\boost\\multiprecision\\traits\\", bool bSearchSubdirectories=false) Line 113 C++
File Lister 6.0.exe!SearchDirectory(std::basic_string<char,std::char_traits<char>,std::allocator<char> > FileSearch="\*", std::basic_string<char,std::char_traits<char>,std::allocator<char> > refvecFiles="c:\\boost\\multiprecision\\detail\\", bool bSearchSubdirectories=false) Line 113 C++
File Lister 6.0.exe!SearchDirectory(std::basic_string<char,std::char_traits<char>,std::allocator<char> > FileSearch="\*", std::basic_string<char,std::char_traits<char>,std::allocator<char> > refvecFiles="c:\\boost\\multiprecision\\cpp_int\\", bool bSearchSubdirectories=false) Line 113 C++
File Lister 6.0.exe!SearchDirectory(std::basic_string<char,std::char_traits<char>,std::allocator<char> > FileSearch="\*", std::basic_string<char,std::char_traits<char>,std::allocator<char> > refvecFiles="c:\\boost\\multiprecision\\concepts\\", bool bSearchSubdirectories=false) Line 113 C++
调试器在 ostream 中停止
if (_State == ios_base::goodbit
&& _Ostr.rdbuf()->sputn(_Val, _Count) != _Count)
_State |= ios_base::badbit;
【问题讨论】：
-
人们不断将 C++ 标签添加到您的 C++11 问题中。请接受提示！
-
如果您遇到崩溃，您应该做的第一件事是在调试器中运行您的程序，并让调试器在运行中捕获崩溃。这将告诉您在哪里崩溃发生了，您将能够检查函数调用堆栈并将其向上移动到您的代码（如果调试器尚未在您的代码中停止），然后您可以检查所有变量的值。至少你应该编辑你的问题，向我们展示崩溃的位置在你的代码中，最好是相关变量的值。