mirror of
https://gitlab.com/sortix/sortix.git
synced 2023-02-13 20:55:38 -05:00
74 lines
1.8 KiB
C++
74 lines
1.8 KiB
C++
/*
|
|
* Copyright (c) 2013 Jonas 'Sortie' Termansen.
|
|
*
|
|
* 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.
|
|
*
|
|
* 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->dev = dev;
|
|
this->ino = ino;
|
|
}
|
|
|
|
Null::~Null()
|
|
{
|
|
}
|
|
|
|
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
|