Symlink.h

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef SYMLINK_H
#define SYMLINK_H

#include "File.h"
#include "pedigree/kernel/Log.h"
#include "pedigree/kernel/compiler.h"
#include "pedigree/kernel/processor/types.h"
#include "pedigree/kernel/time/Time.h"
#include "pedigree/kernel/utilities/String.h"

class EXPORTED_PUBLIC Symlink : public File
{
    friend class Filesystem;

  public:
    static Symlink *fromFile(File *pF)
    {
        if (!pF->isSymlink())
            FATAL("Casting non-symlink File to Symlink!");
        return reinterpret_cast<Symlink *>(pF);
    }

    Symlink();

    Symlink(const Symlink &file);

  private:
    Symlink &operator=(const Symlink &);

  public:
    Symlink(
        const String &name, Time::Timestamp accessedTime,
        Time::Timestamp modifiedTime, Time::Timestamp creationTime,
        uintptr_t inode, class Filesystem *pFs, size_t size, File *pParent);
    virtual ~Symlink();

    virtual bool isSymlink()
    {
        return true;
    }

    int followLink(char *pBuffer, size_t bufLen);

    File *followLink();

  protected:
    File *m_pCachedSymlink;

    String m_sTarget;

    void initialise(bool bForce = false);

    virtual bool isBytewise() const;
};

#endif