Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1049 insertions, 0 deletions

diff --git a/sal/osl/unx/file_misc.cxx b/sal/osl/unx/file_misc.cxx
new file mode 100644
index 000000000..b2d6010fe
--- /dev/null
+++ b/sal/osl/unx/file_misc.cxx
@@ -0,0 +1,1049 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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 <osl/file.hxx>
+#include <osl/detail/file.h>
+
+#include <osl/diagnose.h>
+#include <osl/thread.h>
+#include <osl/signal.h>
+#include <rtl/alloc.h>
+#include <rtl/string.hxx>
+#include <sal/log.hxx>
+
+#include "system.hxx"
+#include "file_impl.hxx"
+#include "file_error_transl.hxx"
+#include "file_path_helper.hxx"
+#include "file_url.hxx"
+#include "uunxapi.hxx"
+#include "readwrite_helper.hxx"
+#include "unixerrnostring.hxx"
+
+#include <sys/types.h>
+#include <errno.h>
+#include <dirent.h>
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+#include <algorithm>
+#include <cassert>
+#include <cstring>
+#include <memory>
+#include <new>
+
+#ifdef ANDROID
+#include <osl/detail/android-bootstrap.h>
+#endif
+
+/************************************************************************
+ *   TODO
+ *
+ *   - Fix: check for corresponding struct sizes in exported functions
+ *   - check size/use of oslDirectory
+ *   - check size/use of oslDirectoryItem
+ ***********************************************************************/
+
+namespace {
+
+struct DirectoryImpl
+{
+    OString strPath;           /* holds native directory path */
+    DIR*         pDirStruct;
+#ifdef ANDROID
+    enum Kind
+    {
+        KIND_DIRENT = 1,
+        KIND_ASSETS = 2
+    };
+    int eKind;
+    lo_apk_dir*  pApkDirStruct;
+#endif
+};
+
+}
+
+DirectoryItem_Impl::DirectoryItem_Impl(
+    OString strFilePath, unsigned char DType)
+    : m_strFilePath (std::move(strFilePath)),
+      m_RefCount     (1),
+      m_DType        (DType)
+{
+}
+DirectoryItem_Impl::~DirectoryItem_Impl()
+{
+}
+
+void DirectoryItem_Impl::acquire()
+{
+    ++m_RefCount;
+}
+void DirectoryItem_Impl::release()
+{
+    if (--m_RefCount == 0)
+        delete this;
+}
+
+oslFileType DirectoryItem_Impl::getFileType() const
+{
+    switch (m_DType)
+    {
+#ifdef _DIRENT_HAVE_D_TYPE
+        case DT_LNK:
+            return osl_File_Type_Link;
+        case DT_DIR:
+            return osl_File_Type_Directory;
+        case DT_REG:
+            return osl_File_Type_Regular;
+        case DT_FIFO:
+            return osl_File_Type_Fifo;
+        case DT_SOCK:
+            return osl_File_Type_Socket;
+        case DT_CHR:
+        case DT_BLK:
+            return osl_File_Type_Special;
+#endif /* _DIRENT_HAVE_D_TYPE */
+        default:
+            break;
+    }
+    return osl_File_Type_Unknown;
+}
+
+static oslFileError osl_psz_createDirectory(
+    char const * pszPath, sal_uInt32 flags);
+static oslFileError osl_psz_removeDirectory(const char* pszPath);
+
+oslFileError SAL_CALL osl_openDirectory(rtl_uString* ustrDirectoryURL, oslDirectory* pDirectory)
+{
+    oslFileError eRet;
+
+    OString path;
+
+    if ((ustrDirectoryURL == nullptr) || (ustrDirectoryURL->length == 0) || (pDirectory == nullptr))
+        return osl_File_E_INVAL;
+
+    /* convert file URL to system path */
+    eRet = osl::detail::convertUrlToPathname(OUString::unacquired(&ustrDirectoryURL), &path);
+
+    if( eRet != osl_File_E_None )
+        return eRet;
+
+    osl_systemPathRemoveSeparator(path.pData);
+
+#ifdef MACOSX
+    {
+        auto const n = std::max(int(path.getLength() + 1), int(PATH_MAX));
+        auto const tmp = std::make_unique<char[]>(n);
+        std::strcpy(tmp.get(), path.getStr());
+        if (macxp_resolveAlias(tmp.get(), n) != 0) {
+            return oslTranslateFileError(errno);
+        }
+        path = OString(tmp.get(), std::strlen(tmp.get()));
+    }
+#endif /* MACOSX */
+
+#ifdef ANDROID
+    if( strncmp( path.getStr(), "/assets/", sizeof( "/assets/" ) - 1) == 0 )
+    {
+        lo_apk_dir *pdir = lo_apk_opendir( path.getStr() );
+
+        if( pdir )
+        {
+            DirectoryImpl* pDirImpl = new(std::nothrow) DirectoryImpl;
+
+            if( pDirImpl )
+            {
+                pDirImpl->eKind = DirectoryImpl::KIND_ASSETS;
+                pDirImpl->pApkDirStruct = pdir;
+                pDirImpl->strPath = path;
+
+                *pDirectory = (oslDirectory) pDirImpl;
+                return osl_File_E_None;
+            }
+            else
+            {
+                errno = ENOMEM;
+                lo_apk_closedir( pdir );
+            }
+        }
+    }
+    else
+#endif
+    {
+        /* open directory */
+        DIR *pdir = opendir( path.getStr() );
+
+        if( pdir )
+        {
+            SAL_INFO("sal.file", "opendir(" << path << ") => " << pdir);
+
+            /* create and initialize impl structure */
+            DirectoryImpl* pDirImpl = new(std::nothrow) DirectoryImpl;
+
+            if( pDirImpl )
+            {
+                pDirImpl->pDirStruct = pdir;
+                pDirImpl->strPath = path;
+#ifdef ANDROID
+                pDirImpl->eKind = DirectoryImpl::KIND_DIRENT;
+#endif
+                *pDirectory = static_cast<oslDirectory>(pDirImpl);
+                return osl_File_E_None;
+            }
+            errno = ENOMEM;
+            closedir( pdir );
+        }
+        else
+        {
+            int e = errno;
+            SAL_INFO("sal.file", "opendir(" << path << "): " << UnixErrnoString(e));
+            // Restore errno after possible modification by SAL_INFO above
+            errno = e;
+        }
+    }
+
+    return oslTranslateFileError(errno);
+}
+
+oslFileError SAL_CALL osl_closeDirectory(oslDirectory pDirectory)
+{
+    SAL_WARN_IF(!pDirectory, "sal.file", "pDirectory is nullptr");
+    DirectoryImpl* pDirImpl = static_cast<DirectoryImpl*>(pDirectory);
+    oslFileError err = osl_File_E_None;
+
+    if (!pDirImpl)
+        return osl_File_E_INVAL;
+
+#ifdef ANDROID
+    if (pDirImpl->eKind == DirectoryImpl::KIND_ASSETS)
+    {
+        if (lo_apk_closedir(pDirImpl->pApkDirStruct))
+            err = osl_File_E_IO;
+    }
+    else
+#endif
+    {
+        if (closedir( pDirImpl->pDirStruct) != 0)
+        {
+            int e = errno;
+            SAL_INFO("sal.file", "closedir(" << pDirImpl->pDirStruct << "): " << UnixErrnoString(e));
+            err = oslTranslateFileError(e);
+        }
+        else
+            SAL_INFO("sal.file", "closedir(" << pDirImpl->pDirStruct << "): OK");
+    }
+
+    delete pDirImpl;
+
+    return err;
+}
+
+/**********************************************
+ * osl_readdir_impl_
+ *
+ * readdir wrapper, filters out "." and ".."
+ * on request
+ *********************************************/
+
+static struct dirent* osl_readdir_impl_(DIR* pdir)
+{
+    struct dirent* pdirent;
+
+    while ((pdirent = readdir(pdir)) != nullptr)
+    {
+        if ((strcmp(pdirent->d_name, ".") == 0) || (strcmp(pdirent->d_name, "..") == 0))
+            continue;
+        break;
+    }
+
+    return pdirent;
+}
+
+oslFileError SAL_CALL osl_getNextDirectoryItem(oslDirectory pDirectory,
+        oslDirectoryItem* pItem, SAL_UNUSED_PARAMETER sal_uInt32 /*uHint*/)
+{
+    SAL_WARN_IF(!pDirectory, "sal.file", "pDirectory is nullptr");
+    SAL_WARN_IF(!pItem, "sal.file", "pItem is nullptr");
+
+    DirectoryImpl* pDirImpl = static_cast<DirectoryImpl*>(pDirectory);
+    OString strFileName;
+    struct dirent* pEntry;
+
+    if ((pDirectory == nullptr) || (pItem == nullptr))
+        return osl_File_E_INVAL;
+
+#ifdef ANDROID
+    if(pDirImpl->eKind == DirectoryImpl::KIND_ASSETS)
+    {
+        pEntry = lo_apk_readdir(pDirImpl->pApkDirStruct);
+    }
+    else
+#endif
+    {
+        pEntry = osl_readdir_impl_(pDirImpl->pDirStruct);
+    }
+
+    if (!pEntry)
+        return osl_File_E_NOENT;
+
+    char const * filename = pEntry->d_name;
+
+#if defined(MACOSX)
+    // convert decomposed filename to precomposed UTF-8
+    char composed_name[BUFSIZ];
+    CFMutableStringRef strRef = CFStringCreateMutable(nullptr, 0 );
+    CFStringAppendCString(strRef, filename, kCFStringEncodingUTF8);  // UTF8 is default on Mac OSX
+    CFStringNormalize(strRef, kCFStringNormalizationFormC);
+    CFStringGetCString(strRef, composed_name, BUFSIZ, kCFStringEncodingUTF8);
+    CFRelease(strRef);
+    filename = composed_name;
+#endif
+
+    strFileName = OString(filename, strlen(filename));
+
+    auto const strFilePath = osl::systemPathMakeAbsolutePath(pDirImpl->strPath, strFileName);
+
+    DirectoryItem_Impl* pImpl = static_cast< DirectoryItem_Impl* >(*pItem);
+    if (pImpl)
+    {
+        pImpl->release();
+        pImpl = nullptr;
+    }
+#ifdef _DIRENT_HAVE_D_TYPE
+    pImpl = new DirectoryItem_Impl(std::move(strFilePath), pEntry->d_type);
+#else
+    pImpl = new DirectoryItem_Impl(std::move(strFilePath));
+#endif /* _DIRENT_HAVE_D_TYPE */
+    *pItem = pImpl;
+
+    return osl_File_E_None;
+}
+
+oslFileError SAL_CALL osl_getDirectoryItem(rtl_uString* ustrFileURL, oslDirectoryItem* pItem)
+{
+    OString strSystemPath;
+    oslFileError osl_error = osl_File_E_INVAL;
+
+    if ((!ustrFileURL) || (ustrFileURL->length == 0) || (!pItem))
+        return osl_File_E_INVAL;
+
+    osl_error = osl::detail::convertUrlToPathname(OUString::unacquired(&ustrFileURL), &strSystemPath);
+    if (osl_error != osl_File_E_None)
+        return osl_error;
+
+    osl_systemPathRemoveSeparator(strSystemPath.pData);
+
+    if (osl::access(strSystemPath, F_OK) == -1)
+    {
+        osl_error = oslTranslateFileError(errno);
+    }
+    else
+    {
+        *pItem = new DirectoryItem_Impl(std::move(strSystemPath));
+    }
+
+    return osl_error;
+}
+
+oslFileError SAL_CALL osl_acquireDirectoryItem( oslDirectoryItem Item )
+{
+    DirectoryItem_Impl * pImpl = static_cast< DirectoryItem_Impl* >(Item);
+    if (pImpl == nullptr)
+        return osl_File_E_INVAL;
+
+    pImpl->acquire();
+    return osl_File_E_None;
+}
+
+oslFileError SAL_CALL osl_releaseDirectoryItem( oslDirectoryItem Item )
+{
+    DirectoryItem_Impl * pImpl = static_cast< DirectoryItem_Impl* >(Item);
+    if (pImpl == nullptr)
+        return osl_File_E_INVAL;
+
+    pImpl->release();
+    return osl_File_E_None;
+}
+
+oslFileError SAL_CALL osl_createDirectory( rtl_uString* ustrDirectoryURL )
+{
+    return osl_createDirectoryWithFlags(
+        ustrDirectoryURL, osl_File_OpenFlag_Read | osl_File_OpenFlag_Write);
+}
+
+oslFileError osl_createDirectoryWithFlags(
+    rtl_uString * ustrDirectoryURL, sal_uInt32 flags)
+{
+    char path[PATH_MAX];
+    oslFileError eRet;
+
+    SAL_WARN_IF((!ustrDirectoryURL) || (ustrDirectoryURL->length == 0),
+                "sal.file", "Invalid directory URL");
+
+    /* convert directory url to system path */
+    eRet = FileURLToPath( path, PATH_MAX, ustrDirectoryURL );
+    if( eRet != osl_File_E_None )
+        return eRet;
+
+#ifdef MACOSX
+    if ( macxp_resolveAlias( path, PATH_MAX ) != 0 )
+      return oslTranslateFileError( errno );
+#endif/* MACOSX */
+
+    return osl_psz_createDirectory( path, flags );
+}
+
+oslFileError SAL_CALL osl_removeDirectory( rtl_uString* ustrDirectoryURL )
+{
+    char path[PATH_MAX];
+    oslFileError eRet;
+
+    SAL_WARN_IF((!ustrDirectoryURL) || (ustrDirectoryURL->length == 0),
+                "sal.file", "Invalid directory URL");
+
+    /* convert directory url to system path */
+    eRet = FileURLToPath( path, PATH_MAX, ustrDirectoryURL );
+    if( eRet != osl_File_E_None )
+        return eRet;
+
+#ifdef MACOSX
+    if ( macxp_resolveAlias( path, PATH_MAX ) != 0 )
+      return oslTranslateFileError( errno );
+#endif/* MACOSX */
+
+    return osl_psz_removeDirectory( path );
+}
+
+oslFileError osl_psz_createDirectory(char const * pszPath, sal_uInt32 flags)
+{
+    int nRet=0;
+    int mode
+        = (((flags & osl_File_OpenFlag_Read) == 0
+            ? 0
+            : ((flags & osl_File_OpenFlag_Private) == 0
+               ? S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH
+               : S_IRUSR | S_IXUSR))
+           | ((flags & osl_File_OpenFlag_Write) == 0
+              ? 0
+              : ((flags & osl_File_OpenFlag_Private) == 0
+                 ? S_IWUSR | S_IWGRP | S_IWOTH
+                 : S_IWUSR)));
+
+    nRet = mkdir(pszPath,mode);
+
+    if ( nRet < 0 )
+    {
+        nRet=errno;
+        SAL_INFO("sal.file", "mkdir(" << pszPath << ",0" << std::oct << mode << std::dec << "): " << UnixErrnoString(nRet));
+        return oslTranslateFileError(nRet);
+    }
+    else
+        SAL_INFO("sal.file", "mkdir(" << pszPath << ",0" << std::oct << mode << std::dec << "): OK");
+
+    return osl_File_E_None;
+}
+
+static oslFileError osl_psz_removeDirectory( const char* pszPath )
+{
+    int nRet = rmdir(pszPath);
+
+    if ( nRet < 0 )
+    {
+        nRet=errno;
+        SAL_INFO("sal.file", "rmdir(" << pszPath << "): " << UnixErrnoString(nRet));
+        return oslTranslateFileError(nRet);
+    }
+    else
+        SAL_INFO("sal.file", "rmdir(" << pszPath << "): OK");
+
+    return osl_File_E_None;
+}
+
+static int path_make_parent(char* path)
+{
+    int i = rtl_str_lastIndexOfChar(path, '/');
+
+    if (i > 0)
+    {
+        *(path + i) = 0;
+        return i;
+    }
+    return 0;
+}
+
+static int create_dir_with_callback(
+    char* directory_path,
+    oslDirectoryCreationCallbackFunc aDirectoryCreationCallbackFunc,
+    void* pData)
+{
+    if (osl::mkdir(directory_path, S_IRWXU | S_IRWXG | S_IRWXO) == 0)
+    {
+        if (aDirectoryCreationCallbackFunc)
+        {
+            OUString url;
+            osl::detail::convertPathnameToUrl(directory_path, &url);
+            aDirectoryCreationCallbackFunc(pData, url.pData);
+        }
+        return 0;
+    }
+    return errno;
+}
+
+static oslFileError create_dir_recursively_(
+    char* dir_path,
+    oslDirectoryCreationCallbackFunc aDirectoryCreationCallbackFunc,
+    void* pData)
+{
+    OSL_PRECOND((rtl_str_getLength(dir_path) > 0) && ((dir_path + (rtl_str_getLength(dir_path) - 1)) != (dir_path + rtl_str_lastIndexOfChar(dir_path, '/'))),
+    "Path must not end with a slash");
+
+    int native_err = create_dir_with_callback(
+        dir_path, aDirectoryCreationCallbackFunc, pData);
+
+    if (native_err == 0)
+        return osl_File_E_None;
+
+    if (native_err != ENOENT)
+        return oslTranslateFileError(native_err);
+
+    // we step back until '/a_dir' at maximum because
+    // we should get an error unequal ENOENT when
+    // we try to create 'a_dir' at '/' and would so
+    // return before
+    int pos = path_make_parent(dir_path);
+
+    oslFileError osl_error = create_dir_recursively_(
+        dir_path, aDirectoryCreationCallbackFunc, pData);
+
+    if (osl_error != osl_File_E_None && osl_error != osl_File_E_EXIST)
+        return osl_error;
+
+    dir_path[pos] = '/';
+
+    return create_dir_recursively_(dir_path, aDirectoryCreationCallbackFunc, pData);
+}
+
+oslFileError SAL_CALL osl_createDirectoryPath(
+    rtl_uString* aDirectoryUrl,
+    oslDirectoryCreationCallbackFunc aDirectoryCreationCallbackFunc,
+    void* pData)
+{
+    if (aDirectoryUrl == nullptr)
+        return osl_File_E_INVAL;
+
+    OString sys_path;
+    oslFileError osl_error = osl::detail::convertUrlToPathname(
+        OUString::unacquired(&aDirectoryUrl), &sys_path);
+
+    if (osl_error != osl_File_E_None)
+        return osl_error;
+
+    osl::systemPathRemoveSeparator(sys_path);
+
+    // const_cast because sys_path is a local copy which we want to modify inplace instead of
+    // copy it into another buffer on the heap again
+    return create_dir_recursively_(sys_path.pData->buffer, aDirectoryCreationCallbackFunc, pData);
+}
+
+static oslFileError osl_unlinkFile(const char* pszPath);
+static oslFileError osl_psz_copyFile(const char* pszPath, const char* pszDestPath, bool preserveMetadata);
+static oslFileError osl_psz_moveFile(const char* pszPath, const char* pszDestPath);
+
+static oslFileError  oslDoCopy(const char* pszSourceFileName, const char* pszDestFileName, mode_t nMode, size_t nSourceSize, bool DestFileExists);
+static void attemptChangeMetadata(const char* pszFileName, mode_t nMode, time_t nAcTime, time_t nModTime, uid_t nUID, gid_t nGID);
+static int           oslDoCopyLink(const char* pszSourceFileName, const char* pszDestFileName);
+static int           oslDoCopyFile(const char* pszSourceFileName, const char* pszDestFileName, size_t nSourceSize, mode_t mode);
+static oslFileError  oslDoMoveFile(const char* pszPath, const char* pszDestPath);
+
+oslFileError SAL_CALL osl_moveFile( rtl_uString* ustrFileURL, rtl_uString* ustrDestURL )
+{
+    char srcPath[PATH_MAX];
+    char destPath[PATH_MAX];
+    oslFileError eRet;
+
+    SAL_WARN_IF((!ustrFileURL) || (ustrFileURL->length == 0), "sal.file", "Invalid source file URL");
+    SAL_WARN_IF((!ustrDestURL) || (ustrDestURL->length == 0), "sal.file", "Invalid destination file URL");
+
+    /* convert source url to system path */
+    eRet = FileURLToPath( srcPath, PATH_MAX, ustrFileURL );
+    if( eRet != osl_File_E_None )
+        return eRet;
+
+    /* convert destination url to system path */
+    eRet = FileURLToPath( destPath, PATH_MAX, ustrDestURL );
+    if( eRet != osl_File_E_None )
+        return eRet;
+
+#ifdef MACOSX
+    if ( macxp_resolveAlias( srcPath, PATH_MAX ) != 0 || macxp_resolveAlias( destPath, PATH_MAX ) != 0 )
+      return oslTranslateFileError( errno );
+#endif/* MACOSX */
+
+    return oslDoMoveFile( srcPath, destPath );
+}
+
+oslFileError SAL_CALL osl_replaceFile(rtl_uString* ustrFileURL, rtl_uString* ustrDestURL)
+{
+    int nGid = -1;
+    char destPath[PATH_MAX];
+    oslFileError eRet = FileURLToPath(destPath, PATH_MAX, ustrDestURL);
+    if (eRet == osl_File_E_None)
+    {
+        struct stat aFileStat;
+        // coverity[fs_check_call] - unavoidable TOCTOU
+        int nRet = stat(destPath, &aFileStat);
+        if (nRet == -1)
+        {
+            nRet = errno;
+            SAL_INFO("sal.file", "stat(" << destPath << "): " << UnixErrnoString(nRet));
+        }
+        else
+        {
+            nGid = aFileStat.st_gid;
+        }
+    }
+
+    eRet = osl_moveFile(ustrFileURL, ustrDestURL);
+
+    if (eRet == osl_File_E_None && nGid != -1)
+    {
+        int nRet = chown(destPath, -1, nGid);
+        if (nRet == -1)
+        {
+            nRet = errno;
+            SAL_INFO("sal.file",
+                     "chown(" << destPath << "-1, " << nGid << "): " << UnixErrnoString(nRet));
+        }
+    }
+
+    return eRet;
+}
+
+oslFileError SAL_CALL osl_copyFile( rtl_uString* ustrFileURL, rtl_uString* ustrDestURL )
+{
+    char srcPath[PATH_MAX];
+    char destPath[PATH_MAX];
+    oslFileError eRet;
+
+    SAL_WARN_IF((!ustrFileURL) || (ustrFileURL->length == 0), "sal.file", "Invalid source file URL");
+    SAL_WARN_IF((!ustrDestURL) || (ustrDestURL->length == 0), "sal.file", "Invalid destination file URL");
+
+    /* convert source url to system path */
+    eRet = FileURLToPath( srcPath, PATH_MAX, ustrFileURL );
+    if( eRet != osl_File_E_None )
+        return eRet;
+
+    /* convert destination url to system path */
+    eRet = FileURLToPath( destPath, PATH_MAX, ustrDestURL );
+    if( eRet != osl_File_E_None )
+        return eRet;
+
+#ifdef MACOSX
+    if ( macxp_resolveAlias( srcPath, PATH_MAX ) != 0 || macxp_resolveAlias( destPath, PATH_MAX ) != 0 )
+      return oslTranslateFileError( errno );
+#endif/* MACOSX */
+
+    return osl_psz_copyFile( srcPath, destPath, false );
+}
+
+oslFileError SAL_CALL osl_removeFile(rtl_uString* ustrFileURL)
+{
+    char path[PATH_MAX];
+    oslFileError eRet;
+
+    SAL_WARN_IF(!ustrFileURL || ustrFileURL->length == 0, "sal.file", "Invalid file URL");
+
+    /* convert file url to system path */
+    eRet = FileURLToPath(path, PATH_MAX, ustrFileURL);
+    if (eRet != osl_File_E_None)
+        return eRet;
+
+#ifdef MACOSX
+    if (macxp_resolveAlias(path, PATH_MAX) != 0)
+      return oslTranslateFileError(errno);
+#endif/* MACOSX */
+
+    return osl_unlinkFile(path);
+}
+
+static oslFileError oslDoMoveFile(const char* pszPath, const char* pszDestPath)
+{
+    oslFileError tErr = osl_psz_moveFile(pszPath,pszDestPath);
+    if (tErr == osl_File_E_None)
+        return tErr;
+
+    if (tErr != osl_File_E_XDEV)
+        return tErr;
+
+    tErr = osl_psz_copyFile(pszPath,pszDestPath, true);
+
+    if (tErr != osl_File_E_None)
+    {
+        osl_unlinkFile(pszDestPath);
+        return tErr;
+    }
+
+    tErr = osl_unlinkFile(pszPath);
+
+    return tErr;
+}
+
+static oslFileError osl_unlinkFile(const char* pszPath)
+{
+    int nRet=0;
+    struct stat aStat;
+
+    nRet = lstat_c(pszPath,&aStat);
+    if (nRet < 0)
+    {
+        nRet=errno;
+        return oslTranslateFileError(nRet);
+    }
+
+    if (S_ISDIR(aStat.st_mode))
+        return osl_File_E_ISDIR;
+
+    nRet = unlink(pszPath);
+    if (nRet < 0)
+    {
+        nRet=errno;
+        SAL_INFO("sal.file", "unlink(" << pszPath << "): " << UnixErrnoString(nRet));
+        return oslTranslateFileError(nRet);
+    }
+    else
+        SAL_INFO("sal.file", "unlink(" << pszPath << "): OK");
+
+    return osl_File_E_None;
+}
+
+static oslFileError osl_psz_moveFile(const char* pszPath, const char* pszDestPath)
+{
+    int nRet = rename(pszPath,pszDestPath);
+
+    if (nRet < 0)
+    {
+        nRet=errno;
+        SAL_INFO("sal.file", "rename(" << pszPath << "," << pszDestPath << "): " << UnixErrnoString(nRet));
+        return oslTranslateFileError(nRet);
+    }
+    else
+        SAL_INFO("sal.file", "rename(" << pszPath << "," << pszDestPath << "): OK");
+
+    return osl_File_E_None;
+}
+
+static oslFileError osl_psz_copyFile( const char* pszPath, const char* pszDestPath, bool preserveMetadata )
+{
+    time_t nAcTime=0;
+    time_t nModTime=0;
+    uid_t nUID=0;
+    gid_t nGID=0;
+    int nRet=0;
+    mode_t nMode=0;
+    struct stat aFileStat;
+    oslFileError tErr=osl_File_E_invalidError;
+    size_t nSourceSize=0;
+    bool DestFileExists=true;
+
+    /* mfe: does the source file really exists? */
+    nRet = lstat_c(pszPath,&aFileStat);
+
+    if (nRet < 0)
+    {
+        nRet=errno;
+        return oslTranslateFileError(nRet);
+    }
+
+    /* we do only copy files here */
+    if (S_ISDIR(aFileStat.st_mode))
+        return osl_File_E_ISDIR;
+
+    nSourceSize = static_cast< size_t >(aFileStat.st_size);
+    nMode = aFileStat.st_mode;
+    nAcTime = aFileStat.st_atime;
+    nModTime = aFileStat.st_mtime;
+    nUID = aFileStat.st_uid;
+    nGID = aFileStat.st_gid;
+
+    nRet = stat_c(pszDestPath,&aFileStat);
+    if (nRet < 0)
+    {
+        nRet=errno;
+
+#ifdef IOS
+        // Checking for nonexistent files at least in the iCloud cache directory (like
+        // "/private/var/mobile/Library/Mobile Documents/com~apple~CloudDocs/helloodt0.odt" fails
+        // with EPERM, not ENOENT.
+        if (nRet == EPERM)
+            DestFileExists=false;
+#endif
+
+        if (nRet == ENOENT)
+            DestFileExists=false;
+    }
+
+    /* mfe: the destination file must not be a directory! */
+    if (nRet == 0 && S_ISDIR(aFileStat.st_mode))
+        return osl_File_E_ISDIR;
+
+    /* mfe: file does not exists or is no dir */
+
+    tErr = oslDoCopy(pszPath, pszDestPath, nMode, nSourceSize, DestFileExists);
+
+    if (tErr != osl_File_E_None)
+        return tErr;
+
+    if (preserveMetadata)
+        attemptChangeMetadata(pszDestPath, nMode, nAcTime, nModTime, nUID, nGID);
+
+    return tErr;
+}
+
+static oslFileError oslDoCopy(const char* pszSourceFileName, const char* pszDestFileName, mode_t nMode, size_t nSourceSize, bool DestFileExists)
+{
+    int      nRet=0;
+
+    OString tmpDestFile;
+    if ( DestFileExists )
+    {
+        //TODO: better pick a temp file name instead of adding .osl-tmp:
+        // use the destination file to avoid EXDEV /* Cross-device link */
+        tmpDestFile = pszDestFileName + OString::Concat(".osl-tmp");
+        if (rename(pszDestFileName, tmpDestFile.getStr()) != 0)
+        {
+            int e = errno;
+            SAL_INFO("sal.file", "rename(" << pszDestFileName << ", " << tmpDestFile
+                     << "): " << UnixErrnoString(e));
+            if (e == ENOENT)
+            {
+                DestFileExists = false;
+            }
+            else
+            {
+                return osl_File_E_EXIST; // for want of a better error code
+            }
+        }
+        else
+        {
+            SAL_INFO("sal.file", "rename(" << pszDestFileName << ", " << tmpDestFile
+                     << "): OK");
+        }
+    }
+
+    /* mfe: should be S_ISREG */
+    if ( !S_ISLNK(nMode) )
+    {
+        /* copy SourceFile to DestFile */
+        nRet = oslDoCopyFile(pszSourceFileName,pszDestFileName,nSourceSize, nMode);
+    }
+    /* mfe: OK redundant at the moment */
+    else if ( S_ISLNK(nMode) )
+    {
+        nRet = oslDoCopyLink(pszSourceFileName,pszDestFileName);
+    }
+    else
+    {
+        /* mfe: what to do here? */
+        nRet=ENOSYS;
+    }
+
+    if ( nRet > 0 && DestFileExists )
+    {
+        if (unlink(pszDestFileName) != 0)
+        {
+            int e = errno;
+            SAL_INFO("sal.file", "unlink(" << pszDestFileName << "): " << UnixErrnoString(e));
+        }
+        else
+            SAL_INFO("sal.file", "unlink(" << pszDestFileName << "): OK");
+
+        if (rename(tmpDestFile.getStr(), pszDestFileName) != 0)
+        {
+            int e = errno;
+            SAL_INFO("sal.file", "rename(" << tmpDestFile << ", " << pszDestFileName
+                     << "): " << UnixErrnoString(e));
+        }
+        else
+            SAL_INFO("sal.file", "rename(" << tmpDestFile << ", " << pszDestFileName << "): OK");
+    }
+
+    if ( nRet > 0 )
+    {
+        return oslTranslateFileError(nRet);
+    }
+
+    if ( DestFileExists )
+    {
+        unlink(tmpDestFile.getStr());
+    }
+
+    return osl_File_E_None;
+}
+
+void attemptChangeMetadata( const char* pszFileName, mode_t nMode, time_t nAcTime, time_t nModTime, uid_t nUID, gid_t nGID)
+{
+    struct utimbuf aTimeBuffer;
+
+#if !defined AT_FDCWD
+    if (!S_ISLNK(nMode) && chmod(pszFileName, nMode) < 0)
+#else
+    if ( fchmodat(AT_FDCWD, pszFileName, nMode, AT_SYMLINK_NOFOLLOW) < 0 )
+#endif
+    {
+        int e = errno;
+        SAL_INFO("sal.file", "chmod(" << pszFileName << ",0" << std::oct << nMode << std::dec <<"): " << UnixErrnoString(e));
+    }
+    else
+        SAL_INFO("sal.file", "chmod(" << pszFileName << ",0" << std::oct << nMode << std::dec <<"): OK");
+
+    // No way to change utime of a symlink itself:
+    if (!S_ISLNK(nMode))
+    {
+        aTimeBuffer.actime=nAcTime;
+        aTimeBuffer.modtime=nModTime;
+        if ( utime(pszFileName,&aTimeBuffer) < 0 )
+        {
+            int e = errno;
+            SAL_INFO("sal.file", "utime(" << pszFileName << "): errno " << e);
+        }
+    }
+
+    if ( nUID != getuid() )
+    {
+        nUID=getuid();
+    }
+    if ( lchown(pszFileName,nUID,nGID) < 0 )
+    {
+        int e = errno;
+        SAL_INFO("sal.file", "lchown(" << pszFileName << "): errno " << e);
+    }
+    else
+        SAL_INFO("sal.file", "lchown(" << pszFileName << "): OK");
+}
+
+static int oslDoCopyLink(const char* pszSourceFileName, const char* pszDestFileName)
+{
+    int nRet=0;
+
+    /* mfe: if dest file is symbolic link remove the link and place the file instead (hro says so) */
+    /* mfe: if source is a link copy the link and not the file it points to (hro says so) */
+    char pszLinkContent[PATH_MAX+1];
+
+    pszLinkContent[0] = '\0';
+
+    nRet = readlink(pszSourceFileName,pszLinkContent,PATH_MAX);
+
+    if ( nRet < 0 )
+    {
+        nRet=errno;
+        return nRet;
+    }
+
+    pszLinkContent[ nRet ] = 0;
+
+    nRet = symlink(pszLinkContent,pszDestFileName);
+
+    if ( nRet < 0 )
+    {
+        nRet=errno;
+        return nRet;
+    }
+
+    return 0;
+}
+
+static int oslDoCopyFile(const char* pszSourceFileName, const char* pszDestFileName, size_t nSourceSize, mode_t mode)
+{
+    oslFileHandle SourceFileFH=nullptr;
+    int DestFileFD=0;
+    int nRet=0;
+
+    if (openFilePath(pszSourceFileName,
+                         &SourceFileFH,
+                         osl_File_OpenFlag_Read|osl_File_OpenFlag_NoLock|osl_File_OpenFlag_NoExcl, mode_t(-1)) != osl_File_E_None)
+    {
+        // Let's hope errno is still set relevantly after openFilePath...
+        nRet=errno;
+        return nRet;
+    }
+
+    DestFileFD=open(pszDestFileName, O_WRONLY | O_CREAT, mode);
+
+    if ( DestFileFD < 0 )
+    {
+        nRet=errno;
+        SAL_INFO("sal.file", "open(" << pszDestFileName << ",O_WRONLY|O_CREAT,0" << std::oct << mode << std::dec << "): " << UnixErrnoString(nRet));
+        osl_closeFile(SourceFileFH);
+        return nRet;
+    }
+    else
+        SAL_INFO("sal.file", "open(" << pszDestFileName << ",O_WRONLY|O_CREAT,0" << std::oct << mode << std::dec << "): OK");
+
+    size_t nRemains = nSourceSize;
+
+    if ( nRemains )
+    {
+        /* mmap has problems, try the direct streaming */
+        char pBuffer[0x7FFF];
+
+        do
+        {
+            size_t nToRead = std::min( sizeof(pBuffer), nRemains );
+            sal_uInt64 nRead;
+            bool succeeded;
+            if ( osl_readFile( SourceFileFH, pBuffer, nToRead, &nRead ) != osl_File_E_None || nRead > nToRead || nRead == 0 )
+                break;
+
+            succeeded = safeWrite( DestFileFD, pBuffer, nRead );
+            if ( !succeeded )
+                break;
+
+            // We know nRead <= nToRead, so it must fit in a size_t
+            nRemains -= static_cast<size_t>(nRead);
+        }
+        while( nRemains );
+    }
+
+    if ( nRemains )
+    {
+        if ( errno )
+            nRet = errno;
+        else
+            nRet = ENOSPC;
+    }
+
+    osl_closeFile( SourceFileFH );
+    if ( close( DestFileFD ) == -1 )
+    {
+        int e = errno;
+        SAL_INFO("sal.file", "close(" << DestFileFD << "): " << UnixErrnoString(e));
+        if ( nRet == 0 )
+            nRet = e;
+    }
+    else
+        SAL_INFO("sal.file", "close(" << DestFileFD << "): OK");
+
+    return nRet;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */