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urbackup_backend/urbackupcommon/os_functions_win.cpp
Martin 2cab4e4ec4 Fixed hostname lookup
2015-01-03 12:39:22 +01:00

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/*************************************************************************
* UrBackup - Client/Server backup system
* Copyright (C) 2011-2014 Martin Raiber
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
**************************************************************************/
#include "os_functions.h"
#include "../stringtools.h"
#ifndef OS_FUNC_NO_SERVER
#include "../Interface/Server.h"
#include "../Interface/File.h"
#endif
#ifdef _WIN_PRE_VISTA
#define _WIN32_WINNT 0x0500
#endif
#include <winsock2.h>
#include <windows.h>
#include <stdlib.h>
#include <algorithm>
#include <io.h>
#include <fcntl.h>
#include <sys\stat.h>
#include <time.h>
#include <assert.h>
#include <ws2tcpip.h>
#ifdef USE_NTFS_TXF
#include <KtmW32.h>
#endif
namespace
{
#define REPARSE_MOUNTPOINT_HEADER_SIZE 8
typedef struct {
DWORD ReparseTag;
DWORD ReparseDataLength;
WORD Reserved;
WORD ReparseTargetLength;
WORD ReparseTargetMaximumLength;
WORD Reserved1;
WCHAR ReparseTarget[1];
} REPARSE_MOUNTPOINT_DATA_BUFFER, *PREPARSE_MOUNTPOINT_DATA_BUFFER;
typedef struct _REPARSE_DATA_BUFFER {
ULONG ReparseTag;
USHORT ReparseDataLength;
USHORT Reserved;
union {
struct {
USHORT SubstituteNameOffset;
USHORT SubstituteNameLength;
USHORT PrintNameOffset;
USHORT PrintNameLength;
ULONG Flags;
WCHAR PathBuffer[1];
} SymbolicLinkReparseBuffer;
struct {
USHORT SubstituteNameOffset;
USHORT SubstituteNameLength;
USHORT PrintNameOffset;
USHORT PrintNameLength;
WCHAR PathBuffer[1];
} MountPointReparseBuffer;
struct {
UCHAR DataBuffer[1];
} GenericReparseBuffer;
};
} REPARSE_DATA_BUFFER, *PREPARSE_DATA_BUFFER;
typedef struct {
DWORD RecordLength;
WORD MajorVersion;
WORD MinorVersion;
BYTE FileReferenceNumber[16];
BYTE ParentFileReferenceNumber[16];
USN Usn;
LARGE_INTEGER TimeStamp;
DWORD Reason;
DWORD SourceInfo;
DWORD SecurityId;
DWORD FileAttributes;
WORD FileNameLength;
WORD FileNameOffset;
WCHAR FileName[1];
} USN_RECORD_V3, *PUSN_RECORD_V3;
}
void getMousePos(int &x, int &y)
{
POINT mousepos;
GetCursorPos(&mousepos);
x=mousepos.x;
y=mousepos.y;
}
const int64 WINDOWS_TICK=10000000;
const int64 SEC_TO_UNIX_EPOCH=11644473600LL;
int64 os_windows_to_unix_time(int64 windows_filetime)
{
return windows_filetime / WINDOWS_TICK - SEC_TO_UNIX_EPOCH;
}
int64 os_to_windows_filetime(int64 unix_time)
{
return (unix_time+SEC_TO_UNIX_EPOCH)*WINDOWS_TICK;
}
std::vector<SFile> getFiles(const std::wstring &path, bool *has_error, bool follow_symlinks)
{
return getFilesWin(path, has_error, follow_symlinks);
}
std::vector<SFile> getFilesWin(const std::wstring &path, bool *has_error, bool follow_symlinks, bool exact_filesize, bool with_usn)
{
if(has_error!=NULL)
{
*has_error=false;
}
std::vector<SFile> tmp;
HANDLE fHandle;
WIN32_FIND_DATAW wfd;
std::wstring tpath=path;
if(!tpath.empty() && tpath[tpath.size()-1]=='\\' ) tpath.erase(path.size()-1, 1);
fHandle=FindFirstFileW((tpath+L"\\*").c_str(),&wfd);
if(fHandle==INVALID_HANDLE_VALUE)
{
if(tpath.find(L"\\\\?\\UNC")==0)
{
tpath.erase(0, 7);
tpath=L"\\"+tpath;
fHandle=FindFirstFileW((tpath+L"\\*").c_str(),&wfd);
}
else if(tpath.find(L"\\\\?\\")==0)
{
tpath.erase(0, 4);
fHandle=FindFirstFileW((tpath+L"\\*").c_str(),&wfd);
}
if(fHandle==INVALID_HANDLE_VALUE)
{
if(has_error!=NULL)
{
*has_error=true;
}
return tmp;
}
}
do
{
if( !(wfd.dwFileAttributes &FILE_ATTRIBUTE_REPARSE_POINT && wfd.dwFileAttributes &FILE_ATTRIBUTE_DIRECTORY) || follow_symlinks )
{
SFile f;
f.name=wfd.cFileName;
if(f.name==L"." || f.name==L".." )
continue;
f.usn=0;
f.isdir=(wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)>0;
LARGE_INTEGER lwt;
lwt.HighPart=wfd.ftLastWriteTime.dwHighDateTime;
lwt.LowPart=wfd.ftLastWriteTime.dwLowDateTime;
f.last_modified=os_windows_to_unix_time(lwt.QuadPart);
LARGE_INTEGER size;
size.HighPart=wfd.nFileSizeHigh;
size.LowPart=wfd.nFileSizeLow;
f.size=size.QuadPart;
lwt.HighPart=wfd.ftCreationTime.dwHighDateTime;
lwt.LowPart=wfd.ftCreationTime.dwLowDateTime;
f.created=os_windows_to_unix_time(lwt.QuadPart);
if(exact_filesize && !(wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) )
{
if(wfd.dwFileAttributes &FILE_ATTRIBUTE_REPARSE_POINT || with_usn)
{
HANDLE hFile = CreateFileW(os_file_prefix(tpath+L"\\"+f.name).c_str(), GENERIC_READ, FILE_SHARE_WRITE|FILE_SHARE_READ, NULL,
OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
if(hFile!=INVALID_HANDLE_VALUE)
{
BY_HANDLE_FILE_INFORMATION file_info;
if(GetFileInformationByHandle(hFile, &file_info))
{
size.HighPart = file_info.nFileSizeHigh;
size.LowPart = file_info.nFileSizeLow;
f.size = size.QuadPart;
lwt.HighPart = file_info.ftLastWriteTime.dwHighDateTime;
lwt.LowPart = file_info.ftLastWriteTime.dwLowDateTime;
f.last_modified = os_windows_to_unix_time(lwt.QuadPart);
lwt.HighPart=file_info.ftCreationTime.dwHighDateTime;
lwt.LowPart=file_info.ftCreationTime.dwLowDateTime;
f.created=os_windows_to_unix_time(lwt.QuadPart);
}
if(!(wfd.dwFileAttributes &FILE_ATTRIBUTE_REPARSE_POINT))
{
std::vector<char> buffer;
buffer.resize(1024);
DWORD last_err=0;
do
{
DWORD ret_bytes = 0;
BOOL b = DeviceIoControl(hFile, FSCTL_READ_FILE_USN_DATA, NULL, 0,
buffer.data(), static_cast<DWORD>(buffer.size()), &ret_bytes, NULL);
if(b)
{
USN_RECORD* usnv2=reinterpret_cast<USN_RECORD*>(buffer.data());
if(usnv2->MajorVersion==2)
{
f.usn = usnv2->Usn;
}
else if(usnv2->MajorVersion==3)
{
USN_RECORD_V3* usnv3=reinterpret_cast<USN_RECORD_V3*>(buffer.data());
f.usn = usnv3->Usn;
}
else
{
Server->Log(L"USN entry major version "+convert(usnv2->MajorVersion)+L" of file \""+tpath+L"\\"+f.name+L"\" not supported", LL_ERROR);
}
}
else
{
last_err=GetLastError();
}
if(last_err==ERROR_INSUFFICIENT_BUFFER)
{
buffer.resize(buffer.size()*2);
}
} while (last_err==ERROR_INSUFFICIENT_BUFFER);
}
CloseHandle(hFile);
}
}
else
{
WIN32_FILE_ATTRIBUTE_DATA fad;
if( GetFileAttributesExW(os_file_prefix(tpath+L"\\"+f.name).c_str(), GetFileExInfoStandard, &fad) )
{
size.HighPart = fad.nFileSizeHigh;
size.LowPart = fad.nFileSizeLow;
f.size = size.QuadPart;
lwt.HighPart = fad.ftLastWriteTime.dwHighDateTime;
lwt.LowPart = fad.ftLastWriteTime.dwLowDateTime;
f.last_modified = os_windows_to_unix_time(lwt.QuadPart);
lwt.HighPart=fad.ftCreationTime.dwHighDateTime;
lwt.LowPart=fad.ftCreationTime.dwLowDateTime;
f.created=os_windows_to_unix_time(lwt.QuadPart);
}
}
}
if(f.last_modified<0) f.last_modified*=-1;
tmp.push_back(f);
}
}
while (FindNextFileW(fHandle,&wfd) );
FindClose(fHandle);
std::sort(tmp.begin(), tmp.end());
return tmp;
}
SFile getFileMetadata( const std::wstring &path )
{
SFile ret = {};
ret.name=path;
WIN32_FILE_ATTRIBUTE_DATA fad;
if( GetFileAttributesExW(path.c_str(), GetFileExInfoStandard, &fad) )
{
if (fad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
{
ret.isdir=true;
}
LARGE_INTEGER size;
size.HighPart = fad.nFileSizeHigh;
size.LowPart = fad.nFileSizeLow;
ret.size = size.QuadPart;
LARGE_INTEGER lwt;
lwt.HighPart = fad.ftLastWriteTime.dwHighDateTime;
lwt.LowPart = fad.ftLastWriteTime.dwLowDateTime;
ret.last_modified = os_windows_to_unix_time(lwt.QuadPart);
lwt.HighPart=fad.ftCreationTime.dwHighDateTime;
lwt.LowPart=fad.ftCreationTime.dwLowDateTime;
ret.created=os_windows_to_unix_time(lwt.QuadPart);
return ret;
}
else
{
return SFile();
}
}
#ifndef OS_FUNC_NO_SERVER
void removeFile(const std::wstring &path)
{
_unlink(Server->ConvertToUTF8(path).c_str());
}
void moveFile(const std::wstring &src, const std::wstring &dst)
{
rename(Server->ConvertToUTF8(src).c_str(), Server->ConvertToUTF8(dst).c_str() );
}
#endif
bool isDirectory(const std::wstring &path, void* transaction)
{
DWORD attrib;
#ifdef USE_NTFS_TXF
if(transaction!=NULL)
{
WIN32_FILE_ATTRIBUTE_DATA ad;
if(!GetFileAttributesTransactedW(path.c_str(), GetFileExInfoStandard, &ad, transaction))
{
attrib=0xFFFFFFFF;
}
else
{
attrib = ad.dwFileAttributes;
}
}
else
{
#endif
attrib = GetFileAttributesW(path.c_str());
#ifdef USE_NTFS_TXF
}
#endif
if ( attrib == 0xFFFFFFFF || !(attrib & FILE_ATTRIBUTE_DIRECTORY) )
{
return false;
}
else
{
return true;
}
}
int64 os_atoi64(const std::string &str)
{
return _atoi64(str.c_str());
}
bool os_create_dir(const std::wstring &dir)
{
return CreateDirectoryW(dir.c_str(), NULL)!=0;
}
bool os_create_dir(const std::string &dir)
{
return CreateDirectoryA(dir.c_str(), NULL)!=0;
}
bool os_create_hardlink(const std::wstring &linkname, const std::wstring &fname, bool use_ioref, bool* too_many_links)
{
BOOL r=CreateHardLinkW(linkname.c_str(), fname.c_str(), NULL);
if(too_many_links!=NULL)
{
*too_many_links=false;
if(!r)
{
int err=GetLastError();
if(err==ERROR_TOO_MANY_LINKS)
{
*too_many_links=true;
}
}
}
return r!=0;
}
int64 os_free_space(const std::wstring &path)
{
std::wstring cp=path;
if(path.size()==0)
return -1;
if(cp[cp.size()-1]=='/')
cp.erase(cp.size()-1, 1);
if(cp[cp.size()-1]!='\\')
cp+='\\';
ULARGE_INTEGER li;
BOOL r=GetDiskFreeSpaceExW(path.c_str(), &li, NULL, NULL);
if(r!=0)
return li.QuadPart;
else
return -1;
}
int64 os_total_space(const std::wstring &path)
{
std::wstring cp=path;
if(path.size()==0)
return -1;
if(cp[cp.size()-1]=='/')
cp.erase(cp.size()-1, 1);
if(cp[cp.size()-1]!='\\')
cp+='\\';
ULARGE_INTEGER li;
BOOL r=GetDiskFreeSpaceExW(path.c_str(), NULL, &li, NULL);
if(r!=0)
return li.QuadPart;
else
return -1;
}
bool os_directory_exists(const std::wstring &path)
{
return isDirectory(path, NULL);
}
bool os_remove_nonempty_dir(const std::wstring &path, os_symlink_callback_t symlink_callback, void* userdata, bool delete_root)
{
WIN32_FIND_DATAW wfd;
HANDLE hf=FindFirstFileW((path+L"\\*").c_str(), &wfd);
std::wstring tpath=path;
if(hf==INVALID_HANDLE_VALUE)
{
if(next(tpath, 0, L"\\\\?\\UNC"))
{
tpath.erase(0, 7);
tpath=L"\\"+tpath;
hf=FindFirstFileW((tpath+L"\\*").c_str(),&wfd);
}
else if(next(tpath, 0, L"\\\\?\\"))
{
tpath.erase(0, 4);
hf=FindFirstFileW((tpath+L"\\*").c_str(),&wfd);
}
if(hf==INVALID_HANDLE_VALUE)
{
return false;
}
}
BOOL b=true;
while( b )
{
if( (std::wstring)wfd.cFileName!=L"." && (std::wstring)wfd.cFileName!=L".." )
{
if( wfd.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)
{
if(symlink_callback!=NULL
&& (wfd.dwReserved0==IO_REPARSE_TAG_MOUNT_POINT
|| wfd.dwReserved0==IO_REPARSE_TAG_SYMLINK) )
{
symlink_callback(path+L"\\"+wfd.cFileName, userdata);
}
else if(wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
{
os_remove_symlink_dir(path+L"\\"+wfd.cFileName);
}
else
{
DeleteFileW((path+L"\\"+wfd.cFileName).c_str());
}
}
else if(wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY )
{
os_remove_nonempty_dir(tpath+L"\\"+wfd.cFileName, symlink_callback, userdata);
}
else
{
DeleteFileW((path+L"\\"+wfd.cFileName).c_str());
}
}
b=FindNextFileW(hf,&wfd);
}
FindClose(hf);
if(delete_root)
{
if(!RemoveDirectoryW(path.c_str()))
{
#ifndef OS_FUNC_NO_SERVER
Server->Log(L"Error deleting directory \""+path+L"\"", LL_ERROR);
#endif
}
}
return true;
}
bool os_remove_symlink_dir(const std::wstring &path)
{
return RemoveDirectoryW(path.c_str())!=FALSE;
}
bool os_remove_dir(const std::string &path)
{
return RemoveDirectoryA(path.c_str())!=FALSE;
}
bool os_remove_dir(const std::wstring &path)
{
return RemoveDirectoryW(path.c_str())!=FALSE;
}
std::wstring os_file_sep(void)
{
return L"\\";
}
std::string os_file_sepn(void)
{
return "\\";
}
bool os_link_symbolic_symlink(const std::wstring &target, const std::wstring &lname, void* transaction)
{
#if (_WIN32_WINNT >= 0x0600)
DWORD flags=0;
if(isDirectory(target, transaction))
flags|=SYMBOLIC_LINK_FLAG_DIRECTORY;
DWORD rc;
if(transaction==NULL)
{
rc=CreateSymbolicLink(lname.c_str(), target.c_str(), flags);
}
else
{
rc=CreateSymbolicLinkTransactedW(lname.c_str(), target.c_str(), flags, transaction);
}
if(rc==FALSE)
{
#ifndef OS_FUNC_NO_SERVER
Server->Log(L"Creating symbolic link from \""+lname+L"\" to \""+target+L"\" failed with error "+convert((int)GetLastError()), LL_ERROR);
#endif
}
return rc!=0;
#else
return false;
#endif
}
bool os_link_symbolic_junctions(const std::wstring &target, const std::wstring &lname)
{
bool ret=false;
std::wstring wtarget=target;
HANDLE hJunc=INVALID_HANDLE_VALUE;
char *buf=NULL;
if(wtarget.find(L"\\\\?\\UNC")==0)
{
wtarget.erase(0, 7);
wtarget=L"\\"+wtarget;
}
else if(wtarget.find(os_file_prefix(L""))==0)
{
wtarget.erase(0, os_file_prefix(L"").size());
}
if(!wtarget.empty() && wtarget[0]!='\\')
wtarget=L"\\??\\"+wtarget;
if(!wtarget.empty() && wtarget[wtarget.size()-1]=='\\')
wtarget.erase(wtarget.size()-1, 1);
if(!CreateDirectoryW(lname.c_str(), NULL) )
{
goto cleanup;
}
hJunc=CreateFileW(lname.c_str(), GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_FLAG_OPEN_REPARSE_POINT|FILE_FLAG_BACKUP_SEMANTICS, NULL);
if(hJunc==INVALID_HANDLE_VALUE)
goto cleanup;
size_t bsize=sizeof(REPARSE_MOUNTPOINT_DATA_BUFFER) + (wtarget.size()+1) * sizeof(wchar_t)+30;
buf=new char[bsize];
memset(buf, 0, bsize);
REPARSE_MOUNTPOINT_DATA_BUFFER *rb=(REPARSE_MOUNTPOINT_DATA_BUFFER*)buf;
rb->ReparseTag=IO_REPARSE_TAG_MOUNT_POINT;
rb->ReparseTargetMaximumLength=(WORD)((wtarget.size()+1)*sizeof(wchar_t));
rb->ReparseTargetLength=rb->ReparseTargetMaximumLength-1*sizeof(wchar_t);
rb->ReparseDataLength=rb->ReparseTargetLength+12;
memcpy(rb->ReparseTarget, wtarget.c_str(), rb->ReparseTargetMaximumLength);
DWORD bytes_ret;
if(!DeviceIoControl(hJunc, FSCTL_SET_REPARSE_POINT, rb, rb->ReparseDataLength+REPARSE_MOUNTPOINT_HEADER_SIZE, NULL, 0, &bytes_ret, NULL) )
{
goto cleanup;
}
ret=true;
cleanup:
if(!ret)
{
#ifndef OS_FUNC_NO_SERVER
Server->Log("Creating junction failed. Last error="+nconvert((int)GetLastError()), LL_ERROR);
#endif
}
delete []buf;
if(hJunc!=INVALID_HANDLE_VALUE)
CloseHandle(hJunc);
if(!ret)
{
RemoveDirectoryW(lname.c_str());
}
return ret;
}
#ifndef OS_FUNC_NO_NET
bool os_lookuphostname(std::string pServer, unsigned int *dest)
{
const char* host=pServer.c_str();
unsigned int addr = inet_addr(host);
if (addr != INADDR_NONE)
{
*dest = addr;
}
else
{
addrinfo hints;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
addrinfo* h;
if(getaddrinfo(pServer.c_str(), NULL, &hints, &h)==0)
{
if(h!=NULL)
{
if(h->ai_addrlen>=sizeof(sockaddr_in))
{
*dest=reinterpret_cast<sockaddr_in*>(h->ai_addr)->sin_addr.s_addr;
freeaddrinfo(h);
return true;
}
else
{
freeaddrinfo(h);
return false;
}
}
else
{
return false;
}
freeaddrinfo(h);
}
else
{
return false;
}
}
return true;
}
#endif
bool os_link_symbolic(const std::wstring &target, const std::wstring &lname, void* transaction)
{
if(transaction==NULL)
{
if(!isDirectory(target, NULL) || !os_link_symbolic_junctions(target, lname) )
return os_link_symbolic_symlink(target, lname, NULL);
}
else
{
return os_link_symbolic_symlink(target, lname, transaction);
}
return true;
}
bool os_get_symlink_target(const std::wstring &lname, std::wstring &target)
{
HANDLE hJunc=CreateFileW(lname.c_str(), GENERIC_READ, FILE_SHARE_READ,
NULL, OPEN_EXISTING, FILE_FLAG_OPEN_REPARSE_POINT|FILE_ATTRIBUTE_REPARSE_POINT|FILE_FLAG_BACKUP_SEMANTICS, NULL);
if(hJunc==INVALID_HANDLE_VALUE)
return false;
DWORD needed_buffer_size = 0;
DWORD bytes_returned;
std::string buffer;
buffer.resize((std::max)((size_t)REPARSE_GUID_DATA_BUFFER_HEADER_SIZE, (size_t)512));
BOOL b = DeviceIoControl(hJunc, FSCTL_GET_REPARSE_POINT, NULL, 0, &buffer[0], static_cast<DWORD>(buffer.size()), &bytes_returned, NULL);
if(!b)
{
if(GetLastError()!= ERROR_INSUFFICIENT_BUFFER)
{
CloseHandle(hJunc);
return false;
}
}
const REPARSE_DATA_BUFFER* reparse_buffer = reinterpret_cast<const REPARSE_DATA_BUFFER*>(buffer.data());
if(!IsReparseTagMicrosoft(reparse_buffer->ReparseTag))
{
CloseHandle(hJunc);
return false;
}
if(!b)
{
buffer.resize(reparse_buffer->ReparseDataLength);
b = DeviceIoControl(hJunc, FSCTL_GET_REPARSE_POINT, NULL, 0, &buffer[0], static_cast<DWORD>(buffer.size()), &bytes_returned, NULL);
if(!b)
{
CloseHandle(hJunc);
return false;
}
}
CloseHandle(hJunc);
bool ret=true;
if(reparse_buffer->ReparseTag==IO_REPARSE_TAG_SYMLINK)
{
target.resize(reparse_buffer->SymbolicLinkReparseBuffer.SubstituteNameLength/sizeof(wchar_t));
memcpy(&target[0],
&reparse_buffer->SymbolicLinkReparseBuffer.PathBuffer[reparse_buffer->SymbolicLinkReparseBuffer.SubstituteNameOffset/sizeof(wchar_t)],
reparse_buffer->SymbolicLinkReparseBuffer.SubstituteNameLength);
}
else if(reparse_buffer->ReparseTag==IO_REPARSE_TAG_MOUNT_POINT)
{
target.resize(reparse_buffer->MountPointReparseBuffer.SubstituteNameLength/sizeof(wchar_t));
memcpy(&target[0],
&reparse_buffer->MountPointReparseBuffer.PathBuffer[reparse_buffer->MountPointReparseBuffer.SubstituteNameOffset/sizeof(wchar_t)],
reparse_buffer->MountPointReparseBuffer.SubstituteNameLength);
}
else
{
ret=false;
}
if(next(target, 0, L"\\??\\"))
target.erase(0,4);
return ret;
}
bool os_is_symlink(const std::wstring &lname)
{
DWORD attrs = GetFileAttributesW(lname.c_str());
if(attrs == INVALID_FILE_ATTRIBUTES)
return false;
return (attrs & FILE_ATTRIBUTE_REPARSE_POINT)>0;
}
std::wstring os_file_prefix(std::wstring path)
{
if(path.size()>=2 && path[0]=='\\' && path[1]=='\\' )
{
if(path.size()>=3 && path[2]=='?')
{
return path;
}
else
{
return L"\\\\?\\UNC"+path.substr(1);
}
}
else
return L"\\\\?\\"+path;
}
bool os_file_truncate(const std::wstring &fn, int64 fsize)
{
int fh;
if( _wsopen_s ( &fh, fn.c_str(), _O_RDWR | _O_CREAT, _SH_DENYNO,
_S_IREAD | _S_IWRITE ) == 0 )
{
if( _chsize_s( fh, fsize ) != 0 )
{
_close( fh );
return false;
}
_close( fh );
return true;
}
else
{
return false;
}
}
std::string os_strftime(std::string fs)
{
time_t rawtime;
char buffer [100];
time ( &rawtime );
struct tm timeinfo;
localtime_s(&timeinfo, &rawtime);
strftime (buffer,100,fs.c_str(),&timeinfo);
std::string r(buffer);
return r;
}
bool os_create_dir_recursive(std::wstring fn)
{
if(fn.empty())
return false;
bool b=os_create_dir(fn);
if(!b)
{
b=os_create_dir_recursive(ExtractFilePath(fn));
if(!b)
return false;
return os_create_dir(fn);
}
else
{
return true;
}
}
std::wstring os_get_final_path(std::wstring path)
{
#if (_WIN32_WINNT >= 0x0600)
std::wstring ret;
if(path.find(L":")==std::string::npos)
{
path+=L":";
}
if(path.find(L"\\")==std::string::npos)
{
path+=L"\\";
}
HANDLE hFile = CreateFileW(path.c_str(),
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_BACKUP_SEMANTICS,
NULL);
if( hFile==INVALID_HANDLE_VALUE )
{
#ifndef OS_FUNC_NO_SERVER
Server->Log(L"Could not open path in os_get_final_path for \""+path+L"\"", LL_ERROR);
#endif
return path;
}
DWORD dwBufsize = GetFinalPathNameByHandleW( hFile, NULL, 0, VOLUME_NAME_DOS );
if(dwBufsize==0)
{
#ifndef OS_FUNC_NO_SERVER
Server->Log(L"Error getting path size in in os_get_final_path error="+convert((int)GetLastError())+L" for \""+path+L"\"", LL_ERROR);
#endif
CloseHandle(hFile);
return path;
}
ret.resize(dwBufsize+1);
DWORD dwRet = GetFinalPathNameByHandleW( hFile, (LPWSTR)ret.c_str(), dwBufsize, VOLUME_NAME_DOS );
CloseHandle(hFile);
if(dwRet==0)
{
#ifndef OS_FUNC_NO_SERVER
Server->Log("Error getting path in in os_get_final_path error="+nconvert((int)GetLastError()), LL_ERROR);
#endif
}
else if(dwRet<ret.size())
{
ret.resize(dwRet);
if(ret.find(L"\\\\?\\UNC")==0)
{
ret.erase(0, 7);
ret=L"\\"+ret;
}
if(ret.find(L"\\\\?\\")==0)
{
ret.erase(0,4);
}
/*if(ret.size()>=2 && ret[ret.size()-2]=='.' && ret[ret.size()-1]=='.' )
{
ret.resize(ret.size()-2);
}*/
return ret;
}
else
{
#ifndef OS_FUNC_NO_SERVER
Server->Log("Error getting path (buffer too small) in in os_get_final_path error="+nconvert((int)GetLastError()), LL_ERROR);
#endif
}
return path;
#else
return path;
#endif
}
#ifndef OS_FUNC_NO_SERVER
bool os_rename_file(std::wstring src, std::wstring dst, void* transaction)
{
BOOL rc;
#ifdef USE_NTFS_TXF
if(transaction==NULL)
{
#endif
rc = MoveFileExW(src.c_str(), dst.c_str(), MOVEFILE_REPLACE_EXISTING);
#ifdef USE_NTFS_TXF
}
else
{
rc=MoveFileTransactedW(src.c_str(), dst.c_str(), NULL, NULL, MOVEFILE_REPLACE_EXISTING, transaction);
}
#endif
#ifdef _DEBUG
if(rc==0)
{
Server->Log("MoveFileW error: "+nconvert((int)GetLastError()), LL_ERROR);
}
#endif
return rc!=0;
}
#endif
void* os_start_transaction()
{
#ifdef USE_NTFS_TXF
HANDLE htrans = CreateTransaction(NULL, NULL, 0, 0, 0, 0, NULL);
if(htrans==INVALID_HANDLE_VALUE)
{
Server->Log("Creating transaction failed. ec="+nconvert((int)GetLastError), LL_WARNING);
return NULL;
}
return htrans;
#else
return NULL;
#endif
}
bool os_finish_transaction(void* transaction)
{
#ifdef USE_NTFS_TXF
if(transaction==NULL)
{
return false;
}
BOOL b = CommitTransaction(transaction);
if(!b)
{
Server->Log("Commiting transaction failed. ec="+nconvert((int)GetLastError), LL_ERROR);
CloseHandle(transaction);
return false;
}
CloseHandle(transaction);
return true;
#else
return true;
#endif
}
int64 os_last_error()
{
return GetLastError();
}
bool os_set_file_time(const std::wstring& fn, int64 created, int64 last_modified)
{
HANDLE hFile = CreateFileW(fn.c_str(), FILE_WRITE_ATTRIBUTES, FILE_SHARE_WRITE|FILE_SHARE_READ, NULL,
OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
if(hFile!=INVALID_HANDLE_VALUE)
{
LARGE_INTEGER li;
li.QuadPart=os_to_windows_filetime(created);
FILETIME creation_time;
creation_time.dwHighDateTime=li.HighPart;
creation_time.dwLowDateTime=li.LowPart;
li.QuadPart=os_to_windows_filetime(last_modified);
FILETIME modified_time;
modified_time.dwHighDateTime=li.HighPart;
modified_time.dwLowDateTime=li.LowPart;
if(SetFileTime(hFile, &creation_time, NULL, &modified_time))
{
CloseHandle(hFile);
return true;
}
else
{
CloseHandle(hFile);
return false;
}
}
else
{
return false;
}
}
bool copy_file(const std::wstring &src, const std::wstring &dst)
{
IFile *fsrc=Server->openFile(src, MODE_READ);
if(fsrc==NULL) return false;
IFile *fdst=Server->openFile(dst, MODE_WRITE);
if(fdst==NULL)
{
Server->destroy(fsrc);
return false;
}
char buf[4096];
size_t rc;
bool has_error=false;
while( (rc=(_u32)fsrc->Read(buf, 4096, &has_error))>0)
{
if(rc>0)
{
fdst->Write(buf, (_u32)rc, &has_error);
if(has_error)
{
break;
}
}
}
Server->destroy(fsrc);
Server->destroy(fdst);
if(has_error)
{
return false;
}
else
{
return true;
}
}
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