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157 lines
4.7 KiB
157 lines
4.7 KiB
/*--------------------------------------------------------------------------*
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KShred.h Copyright (c) 2000 MieTerra LLC.
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Credits: Andreas F. Pour <bugs@mieterra.com>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef kshred_h
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#define kshred_h
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <tqstring.h>
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#include <tqfile.h>
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#include <tqobject.h>
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#include <tdeio/global.h>
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/**
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* @deprecated
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* Erase a file in a way that makes recovery impossible -- well, no guarentee
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* of that, but at least as difficult as reasonably possible.
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* For this, KShred write several times over the
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* existing file, using different patterns, before deleting it.
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* @author Andreas F. Pour <bugs@mieterra.com>
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* @author David Faure <faure@kde.org> (integration into KDE and progress signal)
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*/
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class TDEIO_EXPORT_DEPRECATED KShred : public TQObject { // KDE4: remove
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Q_OBJECT
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public:
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/**
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* Initialize the class using the name of the file to 'shred'.
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* @param fileName fully qualified name of the file to shred.
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*/
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KShred(TQString fileName);
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/*
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* Destructor for the class.
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*/
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~KShred();
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/**
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* Writes all 1's over the entire file and flushes the file buffers.
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* @return true on success, false on error (invalid filename or write error)
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*/
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bool fill1s();
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/**
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* Writes all 0's over the entire file and flushes the file buffers.
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* @return true on success, false on error (invalid filename or write error)
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*/
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bool fill0s();
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/**
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* Writes the specified byte over the entire file and flushes the file buffers.
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* @param byte the value to write over every byte of the file
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* @return true on success, false on error (invalid filename or write error)
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*/
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bool fillbyte(unsigned int byte);
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/**
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* Writes random bites over the entire file and flushes the file buffers.
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* @return true on success, false on error (invalid filename or write error)
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*/
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bool fillrandom();
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/**
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* Writes the specified byte array over the entire file and flushes the file buffers.
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* @param pattern the value to write over the entire file
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* @param size the length of the 'pattern' byte array
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* @return true on success, false on error (invalid filename or write error)
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*/
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bool fillpattern(unsigned char *pattern, unsigned int size);
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/**
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* Shreds a file by writing a series of values over it (uses
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* #fill0s, then fill1s, then fillrandom, then
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* fillbyte with 0101..., then fillbyte with 1010....
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* @return true on success, false on error (invalid filename or write error)
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*/
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bool shred();
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/**
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* The simplest method to shred a file.
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* No need to create an instance of the class.
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* @param fileName fully qualified name of the file to shred.
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*/
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static bool shred(TQString fileName);
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signals:
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/**
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* Shows progress of the shredding.
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* @param bytes the number of bytes written to the file
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*/
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void processedSize(TDEIO::filesize_t bytes);
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/**
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* Shows a message in the progress dialog
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* @param message the message to display
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*/
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void infoMessage(const TQString & message);
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private:
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/**
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* @internal write the data to the file
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*/
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bool writeData(unsigned char *data, unsigned int size);
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/**
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* @internal flush the data to the file
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*/
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bool flush();
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/**
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* @internal structure for the file information
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*/
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TQFile *file;
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/**
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* @internal for the size of the file
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*/
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TDEIO::filesize_t fileSize;
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/**
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* @internal for keeping track of progress
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*/
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unsigned int totalBytes;
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unsigned int bytesWritten;
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unsigned int lastSignalled;
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unsigned int tbpc;
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unsigned int fspc;
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private:
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class KShredPrivate* d;
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};
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#endif
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