path: root/src/filesys.cpp

/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "filesys.h"
#include "util/string.h"
#include <iostream>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <fstream>
#include "log.h"
#include "config.h"

namespace fs
{

#ifdef _WIN32 // WINDOWS

#define _WIN32_WINNT 0x0501
#include <windows.h>
#include <shlwapi.h>

std::vector<DirListNode> GetDirListing(const std::string &pathstring)
{
	std::vector<DirListNode> listing;

	WIN32_FIND_DATA FindFileData;
	HANDLE hFind = INVALID_HANDLE_VALUE;
	DWORD dwError;

	std::string dirSpec = pathstring + "\\*";

	// Find the first file in the directory.
	hFind = FindFirstFile(dirSpec.c_str(), &FindFileData);

	if (hFind == INVALID_HANDLE_VALUE) {
		dwError = GetLastError();
		if (dwError != ERROR_FILE_NOT_FOUND && dwError != ERROR_PATH_NOT_FOUND) {
			errorstream << "GetDirListing: FindFirstFile error."
					<< " Error is " << dwError << std::endl;
		}
	} else {
		// NOTE:
		// Be very sure to not include '..' in the results, it will
		// result in an epic failure when deleting stuff.

		DirListNode node;
		node.name = FindFileData.cFileName;
		node.dir = FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
		if (node.name != "." && node.name != "..")
			listing.push_back(node);

		// List all the other files in the directory.
		while (FindNextFile(hFind, &FindFileData) != 0) {
			DirListNode node;
			node.name = FindFileData.cFileName;
			node.dir = FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
			if(node.name != "." && node.name != "..")
				listing.push_back(node);
		}

		dwError = GetLastError();
		FindClose(hFind);
		if (dwError != ERROR_NO_MORE_FILES) {
			errorstream << "GetDirListing: FindNextFile error."
					<< " Error is " << dwError << std::endl;
			listing.clear();
			return listing;
 		}
	}
	return listing;
}

bool CreateDir(const std::string &path)
{
	bool r = CreateDirectory(path.c_str(), NULL);
	if(r == true)
		return true;
	if(GetLastError() == ERROR_ALREADY_EXISTS)
		return true;
	return false;
}

bool PathExists(const std::string &path)
{
	return (GetFileAttributes(path.c_str()) != INVALID_FILE_ATTRIBUTES);
}

bool IsPathAbsolute(const std::string &path)
{
	return !PathIsRelative(path.c_str());
}

bool IsDir(const std::string &path)
{
	DWORD attr = GetFileAttributes(path.c_str());
	return (attr != INVALID_FILE_ATTRIBUTES &&
			(attr & FILE_ATTRIBUTE_DIRECTORY));
}

bool IsDirDelimiter(char c)
{
	return c == '/' || c == '\\';
}

bool RecursiveDelete(const std::string &path)
{
	infostream<<"Recursively deleting \""<<path<<"\""<<std::endl;

	DWORD attr = GetFileAttributes(path.c_str());
	bool is_directory = (attr != INVALID_FILE_ATTRIBUTES &&
			(attr & FILE_ATTRIBUTE_DIRECTORY));
	if(!is_directory)
	{
		infostream<<"RecursiveDelete: Deleting file "<<path<<std::endl;
		//bool did = DeleteFile(path.c_str());
		bool did = true;
		if(!did){
			errorstream<<"RecursiveDelete: Failed to delete file "
					<<path<<std::endl;
			return false;
		}
	}
	else
	{
		infostream<<"RecursiveDelete: Deleting content of directory "
				<<path<<std::endl;
		std::vector<DirListNode> content = GetDirListing(path);
		for(size_t i=0; i<content.size(); i++){
			const DirListNode &n = content[i];
			std::string fullpath = path + DIR_DELIM + n.name;
			bool did = RecursiveDelete(fullpath);
			if(!did){
				errorstream<<"RecursiveDelete: Failed to recurse to "
						<<fullpath<<std::endl;
				return false;
			}
		}
		infostream<<"RecursiveDelete: Deleting directory "<<path<<std::endl;
		//bool did = RemoveDirectory(path.c_str();
		bool did = true;
		if(!did){
			errorstream<<"Failed to recursively delete directory "
					<<path<<std::endl;
			return false;
		}
	}
	return true;
}

bool DeleteSingleFileOrEmptyDirectory(const std::string &path)
{
	DWORD attr = GetFileAttributes(path.c_str());
	bool is_directory = (attr != INVALID_FILE_ATTRIBUTES &&
			(attr & FILE_ATTRIBUTE_DIRECTORY));
	if(!is_directory)
	{
		bool did = DeleteFile(path.c_str());
		return did;
	}
	else
	{
		bool did = RemoveDirectory(path.c_str());
		return did;
	}
}

std::string TempPath()
{
	DWORD bufsize = GetTempPath(0, NULL);
	if(bufsize == 0){
		errorstream<<"GetTempPath failed, error = "<<GetLastError()<<std::endl;
		return "";
	}
	std::vector<char> buf(bufsize);
	DWORD len = GetTempPath(bufsize, &buf[0]);
	if(len == 0 || len > bufsize){
		errorstream<<"GetTempPath failed, error = "<<GetLastError()<<std::endl;
		return "";
	}
	return std::string(buf.begin(), buf.begin() + len);
}

#else // POSIX

#include <sys/types.h>
#include <dirent.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
ef='#n1351'>1351