mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-30 00:31:14 +00:00
79fa9765ca
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace! This was a slightly tedious refactoring that took a long time, so it's not unlikely that some bugs crept in. Nevertheless, it does pass basic functionality testing, and it's just real nice to finally see the same pattern in all contexts. :^)
80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <Kernel/Debug.h>
|
|
#include <Kernel/FileSystem/Custody.h>
|
|
#include <Kernel/FileSystem/VirtualFileSystem.h>
|
|
#include <Kernel/Process.h>
|
|
|
|
namespace Kernel {
|
|
|
|
ErrorOr<FlatPtr> Process::sys$open(Userspace<const Syscall::SC_open_params*> user_params)
|
|
{
|
|
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
|
|
auto params = TRY(copy_typed_from_user(user_params));
|
|
|
|
int dirfd = params.dirfd;
|
|
int options = params.options;
|
|
u16 mode = params.mode;
|
|
|
|
if (options & O_NOFOLLOW_NOERROR)
|
|
return EINVAL;
|
|
|
|
if (options & O_UNLINK_INTERNAL)
|
|
return EINVAL;
|
|
|
|
if (options & O_WRONLY)
|
|
REQUIRE_PROMISE(wpath);
|
|
else if (options & O_RDONLY)
|
|
REQUIRE_PROMISE(rpath);
|
|
|
|
if (options & O_CREAT)
|
|
REQUIRE_PROMISE(cpath);
|
|
|
|
// Ignore everything except permission bits.
|
|
mode &= 0777;
|
|
|
|
auto path = TRY(get_syscall_path_argument(params.path));
|
|
|
|
dbgln_if(IO_DEBUG, "sys$open(dirfd={}, path='{}', options={}, mode={})", dirfd, path->view(), options, mode);
|
|
|
|
auto fd_allocation = TRY(m_fds.allocate());
|
|
RefPtr<Custody> base;
|
|
if (dirfd == AT_FDCWD) {
|
|
base = current_directory();
|
|
} else {
|
|
auto base_description = TRY(fds().open_file_description(dirfd));
|
|
if (!base_description->is_directory())
|
|
return ENOTDIR;
|
|
if (!base_description->custody())
|
|
return EINVAL;
|
|
base = base_description->custody();
|
|
}
|
|
|
|
auto description = TRY(VirtualFileSystem::the().open(path->view(), options, mode & ~umask(), *base));
|
|
|
|
if (description->inode() && description->inode()->socket())
|
|
return ENXIO;
|
|
|
|
u32 fd_flags = (options & O_CLOEXEC) ? FD_CLOEXEC : 0;
|
|
m_fds[fd_allocation.fd].set(move(description), fd_flags);
|
|
return fd_allocation.fd;
|
|
}
|
|
|
|
ErrorOr<FlatPtr> Process::sys$close(int fd)
|
|
{
|
|
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
|
|
REQUIRE_PROMISE(stdio);
|
|
auto description = TRY(fds().open_file_description(fd));
|
|
auto result = description->close();
|
|
m_fds[fd] = {};
|
|
if (result.is_error())
|
|
return result.release_error();
|
|
return 0;
|
|
}
|
|
|
|
}
|