mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 17:42:43 +00:00
f5d916a881
An empty anonymous file is useless since it cannot be resized anyway, so let's not support creating it.
69 lines
2.4 KiB
C++
69 lines
2.4 KiB
C++
/*
|
|
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <Kernel/FileSystem/AnonymousFile.h>
|
|
#include <Kernel/FileSystem/FileDescription.h>
|
|
#include <Kernel/Process.h>
|
|
#include <Kernel/VM/AnonymousVMObject.h>
|
|
|
|
namespace Kernel {
|
|
|
|
int Process::sys$anon_create(size_t size, int options)
|
|
{
|
|
REQUIRE_PROMISE(stdio);
|
|
|
|
if (!size)
|
|
return -EINVAL;
|
|
|
|
if (size % PAGE_SIZE)
|
|
return -EINVAL;
|
|
|
|
int new_fd = alloc_fd();
|
|
if (new_fd < 0)
|
|
return new_fd;
|
|
|
|
auto vmobject = AnonymousVMObject::create_with_size(size, AllocationStrategy::Reserve);
|
|
if (!vmobject)
|
|
return -ENOMEM;
|
|
|
|
auto anon_file = AnonymousFile::create(vmobject.release_nonnull());
|
|
auto description_or_error = FileDescription::create(*anon_file);
|
|
if (description_or_error.is_error())
|
|
return description_or_error.error();
|
|
|
|
auto description = description_or_error.release_value();
|
|
description->set_writable(true);
|
|
description->set_readable(true);
|
|
|
|
u32 fd_flags = 0;
|
|
if (options & O_CLOEXEC)
|
|
fd_flags |= FD_CLOEXEC;
|
|
|
|
m_fds[new_fd].set(move(description), fd_flags);
|
|
return new_fd;
|
|
}
|
|
|
|
}
|