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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <sal/config.h>
#include <cassert>
#include <utility>
#include <unotools/tempfile.hxx>
#include <rtl/ustring.hxx>
#include <osl/mutex.hxx>
#include <osl/detail/file.h>
#include <osl/file.hxx>
#include <tools/time.hxx>
#include <tools/debug.hxx>
#include <comphelper/DirectoryHelper.hxx>
#ifdef UNX
#include <unistd.h>
#elif defined( _WIN32 )
#include <process.h>
#endif
using namespace osl;
namespace
{
OUString gTempNameBase_Impl;
}
namespace utl
{
static OUString getParentName( const OUString& aFileName )
{
sal_Int32 lastIndex = aFileName.lastIndexOf( '/' );
OUString aParent;
if (lastIndex > -1)
{
aParent = aFileName.copy(0, lastIndex);
if (aParent.endsWith(":") && aParent.getLength() == 6)
aParent += "/";
if (aParent.equalsIgnoreAsciiCase("file://"))
aParent = "file:///";
}
return aParent;
}
static bool ensuredir( const OUString& rUnqPath )
{
OUString aPath;
if ( rUnqPath.isEmpty() )
return false;
// remove trailing slash
if ( rUnqPath.endsWith("/") )
aPath = rUnqPath.copy( 0, rUnqPath.getLength() - 1 );
else
aPath = rUnqPath;
// HACK: create directory on a mount point with nobrowse option
// returns ENOSYS in any case !!
osl::Directory aDirectory( aPath );
osl::FileBase::RC nError = aDirectory.open();
aDirectory.close();
if( nError == osl::File::E_None )
return true;
// try to create the directory
nError = osl::Directory::create( aPath );
bool bSuccess = ( nError == osl::File::E_None || nError == osl::FileBase::E_EXIST );
if( !bSuccess )
{
// perhaps parent(s) don't exist
OUString aParentDir = getParentName( aPath );
if ( aParentDir != aPath )
{
bSuccess = ensuredir( getParentName( aPath ) );
// After parent directory structure exists try it one's more
if ( bSuccess )
{
// Parent directory exists, retry creation of directory
nError = osl::Directory::create( aPath );
bSuccess =( nError == osl::File::E_None || nError == osl::FileBase::E_EXIST );
}
}
}
return bSuccess;
}
static OUString ConstructTempDir_Impl( const OUString* pParent, bool bCreateParentDirs )
{
OUString aName;
// Ignore pParent on iOS. We don't want to create any temp files
// in the same directory where the document being edited is.
#ifndef IOS
if ( pParent && !pParent->isEmpty() )
{
// test for valid filename
OUString aRet;
if ((osl::FileBase::getSystemPathFromFileURL(*pParent, aRet)
== osl::FileBase::E_None)
&& (osl::FileBase::getFileURLFromSystemPath(aRet, aRet)
== osl::FileBase::E_None))
{
::osl::DirectoryItem aItem;
sal_Int32 i = aRet.getLength();
if ( aRet[i-1] == '/' )
i--;
if ( DirectoryItem::get( aRet.copy(0, i), aItem ) == FileBase::E_None || bCreateParentDirs )
aName = aRet;
}
}
#else
(void) pParent;
(void) bCreateParentDirs;
#endif
if ( aName.isEmpty() )
{
OUString &rTempNameBase_Impl = gTempNameBase_Impl;
if (rTempNameBase_Impl.isEmpty())
{
OUString ustrTempDirURL;
::osl::FileBase::RC rc = ::osl::File::getTempDirURL(
ustrTempDirURL );
if (rc == ::osl::FileBase::E_None)
rTempNameBase_Impl = ustrTempDirURL;
}
// if no parent or invalid parent : use default directory
DBG_ASSERT( !rTempNameBase_Impl.isEmpty(), "No TempDir!" );
aName = rTempNameBase_Impl;
ensuredir( aName );
}
// Make sure that directory ends with a separator
if( !aName.isEmpty() && !aName.endsWith("/") )
aName += "/";
return aName;
}
namespace {
class Tokens {
public:
virtual bool next(OUString *) = 0;
protected:
virtual ~Tokens() {} // avoid warnings
};
class SequentialTokens: public Tokens {
public:
explicit SequentialTokens(bool showZero): m_value(0), m_show(showZero) {}
bool next(OUString * token) override {
assert(token != nullptr);
if (m_value == SAL_MAX_UINT32) {
return false;
}
*token = m_show ? OUString::number(m_value) : OUString();
++m_value;
m_show = true;
return true;
}
private:
sal_uInt32 m_value;
bool m_show;
};
class UniqueTokens: public Tokens {
public:
UniqueTokens(): m_count(0) {}
bool next(OUString * token) override {
assert(token != nullptr);
// Because of the shared globalValue, no single instance of UniqueTokens
// is guaranteed to exhaustively test all 36^6 possible values, but stop
// after that many attempts anyway:
sal_uInt32 radix = 36;
sal_uInt32 max = radix * radix * radix * radix * radix * radix;
// 36^6 == 2'176'782'336 < SAL_MAX_UINT32 == 4'294'967'295
if (m_count == max) {
return false;
}
sal_uInt32 v;
{
osl::MutexGuard g(osl::Mutex::getGlobalMutex());
globalValue
= ((globalValue == SAL_MAX_UINT32
? tools::Time::GetSystemTicks() : globalValue + 1)
% max);
v = globalValue;
}
*token = OUString::number(v, radix);
++m_count;
return true;
}
private:
static sal_uInt32 globalValue;
sal_uInt32 m_count;
};
}
sal_uInt32 UniqueTokens::globalValue = SAL_MAX_UINT32;
namespace
{
class TempDirCreatedObserver : public DirectoryCreationObserver
{
public:
virtual void DirectoryCreated(const OUString& aDirectoryUrl) override
{
File::setAttributes( aDirectoryUrl, osl_File_Attribute_OwnRead |
osl_File_Attribute_OwnWrite | osl_File_Attribute_OwnExe );
};
};
};
static OUString lcl_createName(
const OUString& rLeadingChars, Tokens & tokens, const OUString* pExtension,
const OUString* pParent, bool bDirectory, bool bKeep, bool bLock,
bool bCreateParentDirs )
{
OUString aName = ConstructTempDir_Impl( pParent, bCreateParentDirs );
if ( bCreateParentDirs )
{
sal_Int32 nOffset = rLeadingChars.lastIndexOf("/");
OUString aDirName;
if (-1 != nOffset)
aDirName = aName + rLeadingChars.subView( 0, nOffset );
else
aDirName = aName;
TempDirCreatedObserver observer;
FileBase::RC err = Directory::createPath( aDirName, &observer );
if ( err != FileBase::E_None && err != FileBase::E_EXIST )
return OUString();
}
aName += rLeadingChars;
OUString token;
while (tokens.next(&token))
{
OUString aTmp( aName + token );
if ( pExtension )
aTmp += *pExtension;
else
aTmp += ".tmp";
if ( bDirectory )
{
FileBase::RC err = Directory::create(
aTmp,
(osl_File_OpenFlag_Read | osl_File_OpenFlag_Write
| osl_File_OpenFlag_Private));
if ( err == FileBase::E_None )
{
// !bKeep: only for creating a name, not a file or directory
if ( bKeep || Directory::remove( aTmp ) == FileBase::E_None )
return aTmp;
else
return OUString();
}
else if ( err != FileBase::E_EXIST )
// if f.e. name contains invalid chars stop trying to create dirs
return OUString();
}
else
{
DBG_ASSERT( bKeep, "Too expensive, use directory for creating name!" );
File aFile( aTmp );
FileBase::RC err = aFile.open(
osl_File_OpenFlag_Create | osl_File_OpenFlag_Private
| (bLock ? 0 : osl_File_OpenFlag_NoLock));
if ( err == FileBase::E_None || (bLock && err == FileBase::E_NOLCK) )
{
aFile.close();
return aTmp;
}
else if ( err != FileBase::E_EXIST )
{
// if f.e. name contains invalid chars stop trying to create dirs
// but if there is a folder with such name proceed further
DirectoryItem aTmpItem;
FileStatus aTmpStatus( osl_FileStatus_Mask_Type );
if ( DirectoryItem::get( aTmp, aTmpItem ) != FileBase::E_None
|| aTmpItem.getFileStatus( aTmpStatus ) != FileBase::E_None
|| aTmpStatus.getFileType() != FileStatus::Directory )
return OUString();
}
}
}
return OUString();
}
static OUString CreateTempName_Impl( const OUString* pParent, bool bKeep, bool bDir = true )
{
OUString aEyeCatcher = "lu";
#ifdef UNX
#ifdef DBG_UTIL
const char* eye = getenv("LO_TESTNAME");
if(eye)
{
aEyeCatcher = OUString(eye, strlen(eye), RTL_TEXTENCODING_ASCII_US);
}
#else
static const pid_t pid = getpid();
static const OUString aPidString = OUString::number(pid);
aEyeCatcher += aPidString;
#endif
#elif defined(_WIN32)
static const int pid = _getpid();
static const OUString aPidString = OUString::number(pid);
aEyeCatcher += aPidString;
#endif
UniqueTokens t;
return lcl_createName( aEyeCatcher, t, nullptr, pParent, bDir, bKeep,
false, false);
}
OUString TempFile::CreateTempName()
{
OUString aName(CreateTempName_Impl( nullptr, false ));
// convert to file URL
OUString aTmp;
if ( !aName.isEmpty() )
FileBase::getSystemPathFromFileURL( aName, aTmp );
return aTmp;
}
TempFile::TempFile( const OUString* pParent, bool bDirectory )
: bIsDirectory( bDirectory )
, bKillingFileEnabled( false )
{
aName = CreateTempName_Impl( pParent, true, bDirectory );
}
TempFile::TempFile( const OUString& rLeadingChars, bool _bStartWithZero,
const OUString* pExtension, const OUString* pParent,
bool bCreateParentDirs )
: bIsDirectory( false )
, bKillingFileEnabled( false )
{
SequentialTokens t(_bStartWithZero);
aName = lcl_createName( rLeadingChars, t, pExtension, pParent, false,
true, true, bCreateParentDirs );
}
TempFile::TempFile(TempFile && other) noexcept :
aName(std::move(other.aName)), pStream(std::move(other.pStream)), bIsDirectory(other.bIsDirectory),
bKillingFileEnabled(other.bKillingFileEnabled)
{
other.bKillingFileEnabled = false;
}
TempFile::~TempFile()
{
if ( !bKillingFileEnabled )
return;
// if we're going to delete this file, no point in flushing it when closing
if (pStream && !aName.isEmpty())
static_cast<SvFileStream*>(pStream.get())->SetDontFlushOnClose(true);
pStream.reset();
if ( bIsDirectory )
{
comphelper::DirectoryHelper::deleteDirRecursively(aName);
}
else
{
File::remove( aName );
}
}
bool TempFile::IsValid() const
{
return !aName.isEmpty();
}
OUString TempFile::GetFileName() const
{
OUString aTmp;
FileBase::getSystemPathFromFileURL(aName, aTmp);
return aTmp;
}
OUString const & TempFile::GetURL() const
{
return aName;
}
SvStream* TempFile::GetStream( StreamMode eMode )
{
if (!pStream)
{
if (!aName.isEmpty())
pStream.reset(new SvFileStream(aName, eMode | StreamMode::TEMPORARY));
else
pStream.reset(new SvMemoryStream(nullptr, 0, eMode));
}
return pStream.get();
}
void TempFile::CloseStream()
{
pStream.reset();
}
OUString TempFile::SetTempNameBaseDirectory( const OUString &rBaseName )
{
if( rBaseName.isEmpty() )
return OUString();
OUString aUnqPath( rBaseName );
// remove trailing slash
if ( rBaseName.endsWith("/") )
aUnqPath = rBaseName.copy( 0, rBaseName.getLength() - 1 );
// try to create the directory
bool bRet = false;
osl::FileBase::RC err = osl::Directory::create( aUnqPath );
if ( err != FileBase::E_None && err != FileBase::E_EXIST )
// perhaps parent(s) don't exist
bRet = ensuredir( aUnqPath );
else
bRet = true;
// failure to create base directory means returning an empty string
OUString aTmp;
if ( bRet )
{
// append own internal directory
OUString &rTempNameBase_Impl = gTempNameBase_Impl;
rTempNameBase_Impl = rBaseName + "/";
TempFile aBase( nullptr, true );
if ( aBase.IsValid() )
// use it in case of success
rTempNameBase_Impl = aBase.aName;
// return system path of used directory
FileBase::getSystemPathFromFileURL( rTempNameBase_Impl, aTmp );
}
return aTmp;
}
OUString TempFile::GetTempNameBaseDirectory()
{
return ConstructTempDir_Impl(nullptr, false);
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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