mirror of
https://github.com/moparisthebest/minetest
synced 2024-11-07 09:55:09 -05:00
680 lines
16 KiB
C++
680 lines
16 KiB
C++
/*
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Minetest
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Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "filesys.h"
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#include "util/string.h"
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#include <iostream>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <fstream>
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#include "log.h"
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#include "config.h"
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namespace fs
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{
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#ifdef _WIN32 // WINDOWS
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#define _WIN32_WINNT 0x0501
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#include <windows.h>
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std::vector<DirListNode> GetDirListing(std::string pathstring)
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{
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std::vector<DirListNode> listing;
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WIN32_FIND_DATA FindFileData;
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HANDLE hFind = INVALID_HANDLE_VALUE;
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DWORD dwError;
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std::string dirSpec = pathstring + "\\*";
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// Find the first file in the directory.
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hFind = FindFirstFile(dirSpec.c_str(), &FindFileData);
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if (hFind == INVALID_HANDLE_VALUE) {
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dwError = GetLastError();
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if (dwError != ERROR_FILE_NOT_FOUND && dwError != ERROR_PATH_NOT_FOUND) {
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errorstream << "GetDirListing: FindFirstFile error."
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<< " Error is " << dwError << std::endl;
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}
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} else {
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// NOTE:
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// Be very sure to not include '..' in the results, it will
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// result in an epic failure when deleting stuff.
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DirListNode node;
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node.name = FindFileData.cFileName;
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node.dir = FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
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if (node.name != "." && node.name != "..")
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listing.push_back(node);
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// List all the other files in the directory.
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while (FindNextFile(hFind, &FindFileData) != 0) {
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DirListNode node;
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node.name = FindFileData.cFileName;
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node.dir = FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
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if(node.name != "." && node.name != "..")
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listing.push_back(node);
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}
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dwError = GetLastError();
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FindClose(hFind);
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if (dwError != ERROR_NO_MORE_FILES) {
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errorstream << "GetDirListing: FindNextFile error."
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<< " Error is " << dwError << std::endl;
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listing.clear();
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return listing;
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}
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}
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return listing;
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}
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bool CreateDir(std::string path)
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{
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bool r = CreateDirectory(path.c_str(), NULL);
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if(r == true)
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return true;
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if(GetLastError() == ERROR_ALREADY_EXISTS)
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return true;
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return false;
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}
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bool PathExists(std::string path)
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{
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return (GetFileAttributes(path.c_str()) != INVALID_FILE_ATTRIBUTES);
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}
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bool IsDir(std::string path)
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{
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DWORD attr = GetFileAttributes(path.c_str());
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return (attr != INVALID_FILE_ATTRIBUTES &&
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(attr & FILE_ATTRIBUTE_DIRECTORY));
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}
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bool IsDirDelimiter(char c)
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{
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return c == '/' || c == '\\';
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}
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bool RecursiveDelete(std::string path)
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{
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infostream<<"Recursively deleting \""<<path<<"\""<<std::endl;
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DWORD attr = GetFileAttributes(path.c_str());
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bool is_directory = (attr != INVALID_FILE_ATTRIBUTES &&
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(attr & FILE_ATTRIBUTE_DIRECTORY));
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if(!is_directory)
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{
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infostream<<"RecursiveDelete: Deleting file "<<path<<std::endl;
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//bool did = DeleteFile(path.c_str());
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bool did = true;
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if(!did){
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errorstream<<"RecursiveDelete: Failed to delete file "
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<<path<<std::endl;
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return false;
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}
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}
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else
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{
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infostream<<"RecursiveDelete: Deleting content of directory "
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<<path<<std::endl;
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std::vector<DirListNode> content = GetDirListing(path);
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for(int i=0; i<content.size(); i++){
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const DirListNode &n = content[i];
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std::string fullpath = path + DIR_DELIM + n.name;
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bool did = RecursiveDelete(fullpath);
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if(!did){
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errorstream<<"RecursiveDelete: Failed to recurse to "
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<<fullpath<<std::endl;
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return false;
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}
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}
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infostream<<"RecursiveDelete: Deleting directory "<<path<<std::endl;
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//bool did = RemoveDirectory(path.c_str();
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bool did = true;
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if(!did){
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errorstream<<"Failed to recursively delete directory "
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<<path<<std::endl;
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return false;
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}
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}
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return true;
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}
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bool DeleteSingleFileOrEmptyDirectory(std::string path)
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{
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DWORD attr = GetFileAttributes(path.c_str());
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bool is_directory = (attr != INVALID_FILE_ATTRIBUTES &&
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(attr & FILE_ATTRIBUTE_DIRECTORY));
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if(!is_directory)
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{
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bool did = DeleteFile(path.c_str());
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return did;
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}
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else
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{
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bool did = RemoveDirectory(path.c_str());
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return did;
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}
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}
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std::string TempPath()
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{
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DWORD bufsize = GetTempPath(0, "");
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if(bufsize == 0){
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errorstream<<"GetTempPath failed, error = "<<GetLastError()<<std::endl;
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return "";
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}
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std::vector<char> buf(bufsize);
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DWORD len = GetTempPath(bufsize, &buf[0]);
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if(len == 0 || len > bufsize){
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errorstream<<"GetTempPath failed, error = "<<GetLastError()<<std::endl;
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return "";
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}
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return std::string(buf.begin(), buf.begin() + len);
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}
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#else // POSIX
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#include <sys/types.h>
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#include <dirent.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <unistd.h>
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std::vector<DirListNode> GetDirListing(std::string pathstring)
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{
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std::vector<DirListNode> listing;
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DIR *dp;
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struct dirent *dirp;
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if((dp = opendir(pathstring.c_str())) == NULL) {
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//infostream<<"Error("<<errno<<") opening "<<pathstring<<std::endl;
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return listing;
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}
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while ((dirp = readdir(dp)) != NULL) {
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// NOTE:
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// Be very sure to not include '..' in the results, it will
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// result in an epic failure when deleting stuff.
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if(strcmp(dirp->d_name, ".") == 0 || strcmp(dirp->d_name, "..") == 0)
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continue;
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DirListNode node;
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node.name = dirp->d_name;
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int isdir = -1; // -1 means unknown
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/*
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POSIX doesn't define d_type member of struct dirent and
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certain filesystems on glibc/Linux will only return
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DT_UNKNOWN for the d_type member.
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Also we don't know whether symlinks are directories or not.
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*/
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#ifdef _DIRENT_HAVE_D_TYPE
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if(dirp->d_type != DT_UNKNOWN && dirp->d_type != DT_LNK)
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isdir = (dirp->d_type == DT_DIR);
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#endif /* _DIRENT_HAVE_D_TYPE */
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/*
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Was d_type DT_UNKNOWN, DT_LNK or nonexistent?
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If so, try stat().
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*/
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if(isdir == -1) {
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struct stat statbuf;
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if (stat((pathstring + "/" + node.name).c_str(), &statbuf))
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continue;
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isdir = ((statbuf.st_mode & S_IFDIR) == S_IFDIR);
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}
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node.dir = isdir;
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listing.push_back(node);
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}
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closedir(dp);
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return listing;
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}
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bool CreateDir(std::string path)
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{
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int r = mkdir(path.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
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if(r == 0)
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{
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return true;
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}
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else
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{
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// If already exists, return true
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if(errno == EEXIST)
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return true;
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return false;
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}
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}
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bool PathExists(std::string path)
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{
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struct stat st;
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return (stat(path.c_str(),&st) == 0);
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}
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bool IsDir(std::string path)
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{
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struct stat statbuf;
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if(stat(path.c_str(), &statbuf))
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return false; // Actually error; but certainly not a directory
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return ((statbuf.st_mode & S_IFDIR) == S_IFDIR);
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}
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bool IsDirDelimiter(char c)
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{
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return c == '/';
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}
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bool RecursiveDelete(std::string path)
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{
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/*
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Execute the 'rm' command directly, by fork() and execve()
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*/
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infostream<<"Removing \""<<path<<"\""<<std::endl;
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//return false;
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pid_t child_pid = fork();
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if(child_pid == 0)
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{
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// Child
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char argv_data[3][10000];
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strcpy(argv_data[0], "/bin/rm");
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strcpy(argv_data[1], "-rf");
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strncpy(argv_data[2], path.c_str(), 10000);
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char *argv[4];
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argv[0] = argv_data[0];
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argv[1] = argv_data[1];
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argv[2] = argv_data[2];
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argv[3] = NULL;
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verbosestream<<"Executing '"<<argv[0]<<"' '"<<argv[1]<<"' '"
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<<argv[2]<<"'"<<std::endl;
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execv(argv[0], argv);
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// Execv shouldn't return. Failed.
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_exit(1);
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}
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else
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{
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// Parent
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int child_status;
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pid_t tpid;
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do{
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tpid = wait(&child_status);
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//if(tpid != child_pid) process_terminated(tpid);
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}while(tpid != child_pid);
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return (child_status == 0);
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}
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}
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bool DeleteSingleFileOrEmptyDirectory(std::string path)
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{
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if(IsDir(path)){
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bool did = (rmdir(path.c_str()) == 0);
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if(!did)
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errorstream<<"rmdir errno: "<<errno<<": "<<strerror(errno)
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<<std::endl;
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return did;
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} else {
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bool did = (unlink(path.c_str()) == 0);
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if(!did)
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errorstream<<"unlink errno: "<<errno<<": "<<strerror(errno)
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<<std::endl;
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return did;
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}
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}
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std::string TempPath()
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{
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/*
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Should the environment variables TMPDIR, TMP and TEMP
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and the macro P_tmpdir (if defined by stdio.h) be checked
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before falling back on /tmp?
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Probably not, because this function is intended to be
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compatible with lua's os.tmpname which under the default
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configuration hardcodes mkstemp("/tmp/lua_XXXXXX").
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*/
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#ifdef __ANDROID__
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return DIR_DELIM "sdcard" DIR_DELIM PROJECT_NAME DIR_DELIM "tmp";
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#else
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return DIR_DELIM "tmp";
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#endif
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}
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#endif
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void GetRecursiveSubPaths(std::string path, std::vector<std::string> &dst)
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{
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std::vector<DirListNode> content = GetDirListing(path);
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for(unsigned int i=0; i<content.size(); i++){
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const DirListNode &n = content[i];
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std::string fullpath = path + DIR_DELIM + n.name;
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dst.push_back(fullpath);
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GetRecursiveSubPaths(fullpath, dst);
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}
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}
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bool DeletePaths(const std::vector<std::string> &paths)
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{
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bool success = true;
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// Go backwards to succesfully delete the output of GetRecursiveSubPaths
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for(int i=paths.size()-1; i>=0; i--){
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const std::string &path = paths[i];
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bool did = DeleteSingleFileOrEmptyDirectory(path);
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if(!did){
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errorstream<<"Failed to delete "<<path<<std::endl;
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success = false;
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}
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}
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return success;
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}
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bool RecursiveDeleteContent(std::string path)
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{
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infostream<<"Removing content of \""<<path<<"\""<<std::endl;
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std::vector<DirListNode> list = GetDirListing(path);
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for(unsigned int i=0; i<list.size(); i++)
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{
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if(trim(list[i].name) == "." || trim(list[i].name) == "..")
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continue;
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std::string childpath = path + DIR_DELIM + list[i].name;
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bool r = RecursiveDelete(childpath);
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if(r == false)
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{
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errorstream<<"Removing \""<<childpath<<"\" failed"<<std::endl;
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return false;
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}
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}
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return true;
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}
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bool CreateAllDirs(std::string path)
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{
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std::vector<std::string> tocreate;
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std::string basepath = path;
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while(!PathExists(basepath))
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{
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tocreate.push_back(basepath);
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basepath = RemoveLastPathComponent(basepath);
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if(basepath.empty())
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break;
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}
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for(int i=tocreate.size()-1;i>=0;i--)
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if(!CreateDir(tocreate[i]))
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return false;
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return true;
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}
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bool CopyFileContents(std::string source, std::string target)
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{
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FILE *sourcefile = fopen(source.c_str(), "rb");
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if(sourcefile == NULL){
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errorstream<<source<<": can't open for reading: "
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<<strerror(errno)<<std::endl;
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return false;
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}
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FILE *targetfile = fopen(target.c_str(), "wb");
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if(targetfile == NULL){
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errorstream<<target<<": can't open for writing: "
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<<strerror(errno)<<std::endl;
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fclose(sourcefile);
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return false;
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}
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size_t total = 0;
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bool retval = true;
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bool done = false;
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char readbuffer[BUFSIZ];
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while(!done){
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size_t readbytes = fread(readbuffer, 1,
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sizeof(readbuffer), sourcefile);
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total += readbytes;
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if(ferror(sourcefile)){
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errorstream<<source<<": IO error: "
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<<strerror(errno)<<std::endl;
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retval = false;
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done = true;
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}
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if(readbytes > 0){
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fwrite(readbuffer, 1, readbytes, targetfile);
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}
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if(feof(sourcefile) || ferror(sourcefile)){
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// flush destination file to catch write errors
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// (e.g. disk full)
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fflush(targetfile);
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done = true;
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}
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if(ferror(targetfile)){
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errorstream<<target<<": IO error: "
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<<strerror(errno)<<std::endl;
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retval = false;
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done = true;
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}
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}
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infostream<<"copied "<<total<<" bytes from "
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<<source<<" to "<<target<<std::endl;
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fclose(sourcefile);
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fclose(targetfile);
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return retval;
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}
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bool CopyDir(std::string source, std::string target)
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{
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if(PathExists(source)){
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if(!PathExists(target)){
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fs::CreateAllDirs(target);
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}
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bool retval = true;
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std::vector<DirListNode> content = fs::GetDirListing(source);
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for(unsigned int i=0; i < content.size(); i++){
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std::string sourcechild = source + DIR_DELIM + content[i].name;
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std::string targetchild = target + DIR_DELIM + content[i].name;
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if(content[i].dir){
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if(!fs::CopyDir(sourcechild, targetchild)){
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retval = false;
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}
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}
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else {
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if(!fs::CopyFileContents(sourcechild, targetchild)){
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retval = false;
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}
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}
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}
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return retval;
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}
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else {
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return false;
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}
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}
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bool PathStartsWith(std::string path, std::string prefix)
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{
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size_t pathsize = path.size();
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size_t pathpos = 0;
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size_t prefixsize = prefix.size();
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size_t prefixpos = 0;
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for(;;){
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bool delim1 = pathpos == pathsize
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|| IsDirDelimiter(path[pathpos]);
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bool delim2 = prefixpos == prefixsize
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|| IsDirDelimiter(prefix[prefixpos]);
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if(delim1 != delim2)
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return false;
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if(delim1){
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while(pathpos < pathsize &&
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IsDirDelimiter(path[pathpos]))
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++pathpos;
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while(prefixpos < prefixsize &&
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IsDirDelimiter(prefix[prefixpos]))
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++prefixpos;
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if(prefixpos == prefixsize)
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return true;
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if(pathpos == pathsize)
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return false;
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}
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else{
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size_t len = 0;
|
|
do{
|
|
char pathchar = path[pathpos+len];
|
|
char prefixchar = prefix[prefixpos+len];
|
|
if(FILESYS_CASE_INSENSITIVE){
|
|
pathchar = tolower(pathchar);
|
|
prefixchar = tolower(prefixchar);
|
|
}
|
|
if(pathchar != prefixchar)
|
|
return false;
|
|
++len;
|
|
} while(pathpos+len < pathsize
|
|
&& !IsDirDelimiter(path[pathpos+len])
|
|
&& prefixpos+len < prefixsize
|
|
&& !IsDirDelimiter(
|
|
prefix[prefixpos+len]));
|
|
pathpos += len;
|
|
prefixpos += len;
|
|
}
|
|
}
|
|
}
|
|
|
|
std::string RemoveLastPathComponent(std::string path,
|
|
std::string *removed, int count)
|
|
{
|
|
if(removed)
|
|
*removed = "";
|
|
|
|
size_t remaining = path.size();
|
|
|
|
for(int i = 0; i < count; ++i){
|
|
// strip a dir delimiter
|
|
while(remaining != 0 && IsDirDelimiter(path[remaining-1]))
|
|
remaining--;
|
|
// strip a path component
|
|
size_t component_end = remaining;
|
|
while(remaining != 0 && !IsDirDelimiter(path[remaining-1]))
|
|
remaining--;
|
|
size_t component_start = remaining;
|
|
// strip a dir delimiter
|
|
while(remaining != 0 && IsDirDelimiter(path[remaining-1]))
|
|
remaining--;
|
|
if(removed){
|
|
std::string component = path.substr(component_start,
|
|
component_end - component_start);
|
|
if(i)
|
|
*removed = component + DIR_DELIM + *removed;
|
|
else
|
|
*removed = component;
|
|
}
|
|
}
|
|
return path.substr(0, remaining);
|
|
}
|
|
|
|
std::string RemoveRelativePathComponents(std::string path)
|
|
{
|
|
size_t pos = path.size();
|
|
size_t dotdot_count = 0;
|
|
while(pos != 0){
|
|
size_t component_with_delim_end = pos;
|
|
// skip a dir delimiter
|
|
while(pos != 0 && IsDirDelimiter(path[pos-1]))
|
|
pos--;
|
|
// strip a path component
|
|
size_t component_end = pos;
|
|
while(pos != 0 && !IsDirDelimiter(path[pos-1]))
|
|
pos--;
|
|
size_t component_start = pos;
|
|
|
|
std::string component = path.substr(component_start,
|
|
component_end - component_start);
|
|
bool remove_this_component = false;
|
|
if(component == "."){
|
|
remove_this_component = true;
|
|
}
|
|
else if(component == ".."){
|
|
remove_this_component = true;
|
|
dotdot_count += 1;
|
|
}
|
|
else if(dotdot_count != 0){
|
|
remove_this_component = true;
|
|
dotdot_count -= 1;
|
|
}
|
|
|
|
if(remove_this_component){
|
|
while(pos != 0 && IsDirDelimiter(path[pos-1]))
|
|
pos--;
|
|
path = path.substr(0, pos) + DIR_DELIM +
|
|
path.substr(component_with_delim_end,
|
|
std::string::npos);
|
|
pos++;
|
|
}
|
|
}
|
|
|
|
if(dotdot_count > 0)
|
|
return "";
|
|
|
|
// remove trailing dir delimiters
|
|
pos = path.size();
|
|
while(pos != 0 && IsDirDelimiter(path[pos-1]))
|
|
pos--;
|
|
return path.substr(0, pos);
|
|
}
|
|
|
|
bool safeWriteToFile(const std::string &path, const std::string &content)
|
|
{
|
|
std::string tmp_file = path + ".~mt";
|
|
|
|
// Write to a tmp file
|
|
std::ofstream os(tmp_file.c_str(), std::ios::binary);
|
|
if (!os.good())
|
|
return false;
|
|
os << content;
|
|
os.flush();
|
|
os.close();
|
|
if (os.fail()) {
|
|
remove(tmp_file.c_str());
|
|
return false;
|
|
}
|
|
|
|
// Copy file
|
|
remove(path.c_str());
|
|
if(rename(tmp_file.c_str(), path.c_str())) {
|
|
remove(tmp_file.c_str());
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
} // namespace fs
|
|
|