mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 15:12:45 +00:00
46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
/*
|
|
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <Kernel/FileSystem/AnonymousFile.h>
|
|
#include <Kernel/FileSystem/OpenFileDescription.h>
|
|
#include <Kernel/Memory/AnonymousVMObject.h>
|
|
#include <Kernel/Tasks/Process.h>
|
|
|
|
namespace Kernel {
|
|
|
|
ErrorOr<FlatPtr> Process::sys$anon_create(size_t size, int options)
|
|
{
|
|
VERIFY_NO_PROCESS_BIG_LOCK(this);
|
|
TRY(require_promise(Pledge::stdio));
|
|
|
|
if (!size)
|
|
return EINVAL;
|
|
|
|
if (size % PAGE_SIZE)
|
|
return EINVAL;
|
|
|
|
if (size > NumericLimits<ssize_t>::max())
|
|
return EINVAL;
|
|
|
|
auto vmobject = TRY(Memory::AnonymousVMObject::try_create_purgeable_with_size(size, AllocationStrategy::AllocateNow));
|
|
auto anon_file = TRY(AnonymousFile::try_create(move(vmobject)));
|
|
auto description = TRY(OpenFileDescription::try_create(move(anon_file)));
|
|
|
|
description->set_writable(true);
|
|
description->set_readable(true);
|
|
|
|
u32 fd_flags = 0;
|
|
if (options & O_CLOEXEC)
|
|
fd_flags |= FD_CLOEXEC;
|
|
|
|
return m_fds.with_exclusive([&](auto& fds) -> ErrorOr<FlatPtr> {
|
|
auto new_fd = TRY(fds.allocate());
|
|
fds[new_fd.fd].set(description, fd_flags);
|
|
return new_fd.fd;
|
|
});
|
|
}
|
|
|
|
}
|