minetest/src/filesys.cpp

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/*
Minetest-c55
Copyright (C) 2010 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 General Public License as published by
the Free Software Foundation; either version 2 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 General Public License for more details.
You should have received a copy of the GNU 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.
*/
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#include "filesys.h"
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#include "strfnd.h"
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#include <iostream>
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#include <string.h>
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namespace fs
{
#ifdef _WIN32 // WINDOWS
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#define _WIN32_WINNT 0x0501
#include <windows.h>
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#include <stdio.h>
#include <malloc.h>
#include <tchar.h>
#include <wchar.h>
#include <stdio.h>
#define BUFSIZE MAX_PATH
std::vector<DirListNode> GetDirListing(std::string pathstring)
{
std::vector<DirListNode> listing;
WIN32_FIND_DATA FindFileData;
HANDLE hFind = INVALID_HANDLE_VALUE;
DWORD dwError;
LPTSTR DirSpec;
INT retval;
DirSpec = (LPTSTR) malloc (BUFSIZE);
if( DirSpec == NULL )
{
printf( "Insufficient memory available\n" );
retval = 1;
goto Cleanup;
}
// Check that the input is not larger than allowed.
if (pathstring.size() > (BUFSIZE - 2))
{
_tprintf(TEXT("Input directory is too large.\n"));
retval = 3;
goto Cleanup;
}
//_tprintf (TEXT("Target directory is %s.\n"), pathstring.c_str());
sprintf(DirSpec, "%s", (pathstring + "\\*").c_str());
// Find the first file in the directory.
hFind = FindFirstFile(DirSpec, &FindFileData);
if (hFind == INVALID_HANDLE_VALUE)
{
_tprintf (TEXT("Invalid file handle. Error is %u.\n"),
GetLastError());
retval = (-1);
}
else
{
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// NOTE:
// Be very sure to not include '..' in the results, it will
// result in an epic failure when deleting stuff.
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DirListNode node;
node.name = FindFileData.cFileName;
node.dir = FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
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if(node.name != "." && node.name != "..")
listing.push_back(node);
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// 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;
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if(node.name != "." && node.name != "..")
listing.push_back(node);
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}
dwError = GetLastError();
FindClose(hFind);
if (dwError != ERROR_NO_MORE_FILES)
{
_tprintf (TEXT("FindNextFile error. Error is %u.\n"),
dwError);
retval = (-1);
goto Cleanup;
}
}
retval = 0;
Cleanup:
free(DirSpec);
if(retval != 0) listing.clear();
//for(unsigned int i=0; i<listing.size(); i++){
// std::cout<<listing[i].name<<(listing[i].dir?" (dir)":" (file)")<<std::endl;
//}
return listing;
}
bool CreateDir(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(std::string path)
{
return (GetFileAttributes(path.c_str()) != INVALID_FILE_ATTRIBUTES);
}
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bool RecursiveDelete(std::string path)
{
std::cerr<<"Removing \""<<path<<"\""<<std::endl;
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//return false;
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// This silly function needs a double-null terminated string...
// Well, we'll just make sure it has at least two, then.
path += "\0\0";
SHFILEOPSTRUCT sfo;
sfo.hwnd = NULL;
sfo.wFunc = FO_DELETE;
sfo.pFrom = path.c_str();
sfo.pTo = NULL;
sfo.fFlags = FOF_SILENT | FOF_NOCONFIRMATION | FOF_NOCONFIRMMKDIR;
int r = SHFileOperation(&sfo);
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if(r != 0)
std::cerr<<"SHFileOperation returned "<<r<<std::endl;
//return (r == 0);
return true;
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}
#else // POSIX
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#include <sys/types.h>
#include <dirent.h>
#include <errno.h>
#include <sys/stat.h>
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#include <sys/wait.h>
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std::vector<DirListNode> GetDirListing(std::string pathstring)
{
std::vector<DirListNode> listing;
DIR *dp;
struct dirent *dirp;
if((dp = opendir(pathstring.c_str())) == NULL) {
//std::cout<<"Error("<<errno<<") opening "<<pathstring<<std::endl;
return listing;
}
while ((dirp = readdir(dp)) != NULL) {
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// NOTE:
// Be very sure to not include '..' in the results, it will
// result in an epic failure when deleting stuff.
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if(dirp->d_name[0]!='.'){
DirListNode node;
node.name = dirp->d_name;
if(dirp->d_type == DT_DIR) node.dir = true;
else node.dir = false;
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if(node.name != "." && node.name != "..")
listing.push_back(node);
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}
}
closedir(dp);
return listing;
}
bool CreateDir(std::string path)
{
int r = mkdir(path.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
if(r == 0)
{
return true;
}
else
{
// If already exists, return true
if(errno == EEXIST)
return true;
return false;
}
}
bool PathExists(std::string path)
{
struct stat st;
return (stat(path.c_str(),&st) == 0);
}
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bool RecursiveDelete(std::string path)
{
/*
Execute the 'rm' command directly, by fork() and execve()
*/
std::cerr<<"Removing \""<<path<<"\""<<std::endl;
//return false;
pid_t child_pid = fork();
if(child_pid == 0)
{
// Child
char argv_data[3][10000];
strcpy(argv_data[0], "/bin/rm");
strcpy(argv_data[1], "-rf");
strncpy(argv_data[2], path.c_str(), 10000);
char *argv[4];
argv[0] = argv_data[0];
argv[1] = argv_data[1];
argv[2] = argv_data[2];
argv[3] = NULL;
std::cerr<<"Executing '"<<argv[0]<<"' '"<<argv[1]<<"' '"
<<argv[2]<<"'"<<std::endl;
execv(argv[0], argv);
// Execv shouldn't return. Failed.
_exit(1);
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}
else
{
// Parent
int child_status;
pid_t tpid;
do{
tpid = wait(&child_status);
//if(tpid != child_pid) process_terminated(tpid);
}while(tpid != child_pid);
return (child_status == 0);
}
}
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#endif
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bool RecursiveDeleteContent(std::string path)
{
std::cerr<<"Removing content of \""<<path<<"\""<<std::endl;
std::vector<DirListNode> list = GetDirListing(path);
for(unsigned int i=0; i<list.size(); i++)
{
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if(trim(list[i].name) == "." || trim(list[i].name) == "..")
continue;
std::string childpath = path + "/" + list[i].name;
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bool r = RecursiveDelete(childpath);
if(r == false)
{
std::cerr<<"Removing \""<<childpath<<"\" failed"<<std::endl;
return false;
}
}
return true;
}
bool CreateAllDirs(std::string path)
{
size_t pos;
std::vector<std::string> tocreate;
std::string basepath = path;
while(!PathExists(basepath))
{
tocreate.push_back(basepath);
pos = basepath.rfind('/');
if(pos == std::string::npos)
return false;
basepath = basepath.substr(0,pos);
}
for(int i=tocreate.size()-1;i>=0;i--)
CreateDir(tocreate[i]);
return true;
}
} // namespace fs
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