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// **************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: http://www.gnu.org/licenses/gpl.html *
// * Copyright (C) Zenju (zenju AT gmx DOT de) - All Rights Reserved *
// **************************************************************************
#ifndef FILE_HANDLING_H_8017341345614857
#define FILE_HANDLING_H_8017341345614857
#include "zstring.h"
#include "file_error.h"
#include "file_id_def.h"
#include "int64.h"
namespace zen
{
struct CallbackRemoveDir;
struct CallbackCopyFile;
bool fileExists (const Zstring& filename, std::wstring* sysErrorMsg = nullptr); //noexcept; check whether file *or* (file) symlink exists
bool dirExists (const Zstring& dirname , std::wstring* sysErrorMsg = nullptr); //noexcept; check whether directory *or* (dir) symlink exists
bool symlinkExists (const Zstring& linkname, std::wstring* sysErrorMsg = nullptr); //noexcept; check whether a symbolic link exists
bool somethingExists(const Zstring& objname , std::wstring* sysErrorMsg = nullptr); //noexcept; check whether any object with this name exists
//sysErrorMsg: optional in + optional out! written only for non-expected errors other than ERROR_FILE_NOT_FOUND/ENOENT, ect...
enum SymLinkType
{
SYMLINK_TYPE_DIR, //Windows: may be broken
SYMLINK_TYPE_FILE, //Windows: may be broken
SYMLINK_TYPE_UNKNOWN, //Windows: unable to determine type; Linux: broken Symlink
};
SymLinkType getSymlinkType(const Zstring& linkname); //noexcept
enum ProcSymlink
{
SYMLINK_DIRECT,
SYMLINK_FOLLOW
};
Int64 getFileTime(const Zstring& filename, ProcSymlink procSl); //throw FileError
void setFileTime(const Zstring& filename, const Int64& modificationTime, ProcSymlink procSl); //throw FileError
//symlink handling: always evaluate target
UInt64 getFilesize(const Zstring& filename); //throw FileError
UInt64 getFreeDiskSpace(const Zstring& path); //throw FileError
//file handling
bool removeFile(const Zstring& filename); //throw FileError; return "false" if file is not existing
void removeDirectory(const Zstring& directory, CallbackRemoveDir* callback = nullptr); //throw FileError
//rename file or directory: no copying!!!
void renameFile(const Zstring& oldName, const Zstring& newName); //throw FileError, ErrorDifferentVolume, ErrorTargetExisting
bool supportsPermissions(const Zstring& dirname); //throw FileError, derefernces symlinks
//if parent directory not existing: create recursively:
void makeDirectory(const Zstring& directory, bool failIfExists = false); //throw FileError, ErrorTargetExisting
//fail if already existing or parent directory not existing:
//directory should not end with path separator
//templateDir may be empty
void makeDirectoryPlain(const Zstring& directory, const Zstring& templateDir, bool copyFilePermissions); //throw FileError, ErrorTargetExisting, ErrorTargetPathMissing
struct FileAttrib
{
UInt64 fileSize;
Int64 modificationTime; //time_t UTC compatible
FileId sourceFileId;
FileId targetFileId;
};
void copyFile(const Zstring& sourceFile, //throw FileError, ErrorTargetPathMissing, ErrorFileLocked (Windows-only)
const Zstring& targetFile, //symlink handling: dereference source
bool copyFilePermissions,
bool transactionalCopy,
CallbackCopyFile* callback, //may be nullptr
FileAttrib* newAttrib = nullptr); //return current attributes at the time of copy
//Note: it MAY happen that copyFile() leaves temp files behind, e.g. temporary network drop.
// => clean them up at an appropriate time (automatically set sync directions to delete them). They have the following ending:
const Zstring TEMP_FILE_ENDING = Zstr(".ffs_tmp");
void copySymlink(const Zstring& sourceLink, const Zstring& targetLink, bool copyFilePermissions); //throw FileError
//----------- callbacks ---------------
struct CallbackRemoveDir
{
virtual ~CallbackRemoveDir() {}
virtual void onBeforeFileDeletion(const Zstring& filename) = 0; //one call for each *existing* object!
virtual void onBeforeDirDeletion (const Zstring& dirname ) = 0; //
};
struct CallbackCopyFile
{
virtual ~CallbackCopyFile() {}
//if target is existing user needs to implement deletion: copyFile() NEVER overwrites target if already existing!
//if transactionalCopy == true, full read access on source had been proven at this point, so it's safe to delete it.
virtual void deleteTargetFile(const Zstring& targetFile) = 0; //may throw exceptions
//may throw:
//Linux: unconditionally
//Windows: first exception is swallowed, updateCopyStatus() is then called again where it should throw again and the exception will propagate as expected
virtual void updateCopyStatus(Int64 bytesDelta) = 0; //accummulated delta != file size! consider ADS, sparse, compressed files
};
}
#endif //FILE_HANDLING_H_8017341345614857
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