mirror of
https://gitlab.com/sortix/sortix.git
synced 2023-02-13 20:55:38 -05:00
90 lines
2.1 KiB
C++
90 lines
2.1 KiB
C++
/*******************************************************************************
|
|
|
|
Copyright(C) Jonas 'Sortie' Termansen 2013.
|
|
|
|
This file is part of Sortix.
|
|
|
|
Sortix is free software: you can redistribute it and/or modify it under the
|
|
terms of the GNU General Public License as published by the Free Software
|
|
Foundation, either version 3 of the License, or (at your option) any later
|
|
version.
|
|
|
|
Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
|
|
details.
|
|
|
|
You should have received a copy of the GNU General Public License along with
|
|
Sortix. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
fs/null.cpp
|
|
Bit bucket special device.
|
|
|
|
*******************************************************************************/
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <sortix/stat.h>
|
|
|
|
#include <sortix/kernel/inode.h>
|
|
|
|
#include "null.h"
|
|
|
|
namespace Sortix {
|
|
|
|
Null::Null(dev_t dev, ino_t ino, uid_t owner, gid_t group, mode_t mode)
|
|
{
|
|
inode_type = INODE_TYPE_STREAM;
|
|
if ( !dev )
|
|
dev = (dev_t) this;
|
|
if ( !ino )
|
|
ino = (ino_t) this;
|
|
this->type = S_IFCHR;
|
|
this->stat_uid = owner;
|
|
this->stat_gid = group;
|
|
this->stat_mode = (mode & S_SETABLE) | this->type;
|
|
this->stat_size = 0;
|
|
this->stat_blksize = 1;
|
|
this->dev = dev;
|
|
this->ino = ino;
|
|
}
|
|
|
|
Null::~Null()
|
|
{
|
|
}
|
|
|
|
int Null::truncate(ioctx_t* /*ctx*/, off_t /*length*/)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
off_t Null::lseek(ioctx_t* /*ctx*/, off_t offset, int /*whence*/)
|
|
{
|
|
return offset;
|
|
}
|
|
|
|
ssize_t Null::read(ioctx_t* /*ctx*/, uint8_t* /*buf*/, size_t /*count*/)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
ssize_t Null::pread(ioctx_t* /*ctx*/, uint8_t* /*buf*/, size_t /*count*/,
|
|
off_t /*off*/)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
ssize_t Null::write(ioctx_t* /*ctx*/, const uint8_t* /*buf*/, size_t count)
|
|
{
|
|
return count;
|
|
}
|
|
|
|
ssize_t Null::pwrite(ioctx_t* /*ctx*/, const uint8_t* /*buf*/, size_t count,
|
|
off_t /*off*/)
|
|
{
|
|
return count;
|
|
}
|
|
|
|
} // namespace Sortix
|