FatSymlink.cc

/*
 * 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.
 */

#include "FatSymlink.h"
#include "FatFilesystem.h"
#include "modules/system/vfs/File.h"

FatSymlink::FatSymlink(
    String name, Time::Timestamp accessedTime, Time::Timestamp modifiedTime,
    Time::Timestamp creationTime, uintptr_t inode, class Filesystem *pFs,
    size_t size, uint32_t dirClus, uint32_t dirOffset, File *pParent)
    : Symlink(
          name, accessedTime, modifiedTime, creationTime, inode, pFs, size,
          pParent),
      m_DirClus(dirClus), m_DirOffset(dirOffset)
{
    // No permissions on FAT - set all to RWX.
    setPermissions(
        FILE_UR | FILE_UW | FILE_UX | FILE_GR | FILE_GW | FILE_GX | FILE_OR |
        FILE_OW | FILE_OX);
}

uint64_t FatSymlink::readBytewise(
    uint64_t location, uint64_t size, uintptr_t buffer, bool bCanBlock)
{
    FatFilesystem *pFs = static_cast<FatFilesystem *>(m_pFilesystem);
    return pFs->read(this, location, size, buffer);
}

uint64_t FatSymlink::writeBytewise(
    uint64_t location, uint64_t size, uintptr_t buffer, bool bCanBlock)
{
    FatFilesystem *pFs = static_cast<FatFilesystem *>(m_pFilesystem);
    uint64_t ret = pFs->write(this, location, size, buffer);

    // Reset the symlink target.
    initialise(true);

    return ret;
}