mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-22 23:50:19 +00:00
40a942d28b
The only two paths for copying strings in the kernel should be going through the existing Userspace<char const*>, or StringArgument methods. Lets enforce this by removing the option for using the raw cstring APIs that were previously available.
96 lines
3 KiB
C++
96 lines
3 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
* Copyright (c) 2021, sin-ack <sin-ack@protonmail.com>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <Kernel/API/InodeWatcherFlags.h>
|
|
#include <Kernel/FileSystem/Custody.h>
|
|
#include <Kernel/FileSystem/FileDescription.h>
|
|
#include <Kernel/FileSystem/InodeWatcher.h>
|
|
#include <Kernel/Process.h>
|
|
|
|
namespace Kernel {
|
|
|
|
KResultOr<FlatPtr> Process::sys$create_inode_watcher(u32 flags)
|
|
{
|
|
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
|
|
REQUIRE_PROMISE(rpath);
|
|
|
|
auto fd_or_error = m_fds.allocate();
|
|
if (fd_or_error.is_error())
|
|
return fd_or_error.error();
|
|
auto inode_watcher_fd = fd_or_error.release_value();
|
|
|
|
auto watcher_or_error = InodeWatcher::create();
|
|
if (watcher_or_error.is_error())
|
|
return watcher_or_error.error();
|
|
|
|
auto description_or_error = FileDescription::create(*watcher_or_error.value());
|
|
if (description_or_error.is_error())
|
|
return description_or_error.error();
|
|
|
|
m_fds[inode_watcher_fd.fd].set(description_or_error.release_value());
|
|
m_fds[inode_watcher_fd.fd].description()->set_readable(true);
|
|
|
|
if (flags & static_cast<unsigned>(InodeWatcherFlags::Nonblock))
|
|
m_fds[inode_watcher_fd.fd].description()->set_blocking(false);
|
|
if (flags & static_cast<unsigned>(InodeWatcherFlags::CloseOnExec))
|
|
m_fds[inode_watcher_fd.fd].set_flags(m_fds[inode_watcher_fd.fd].flags() | FD_CLOEXEC);
|
|
|
|
return inode_watcher_fd.fd;
|
|
}
|
|
|
|
KResultOr<FlatPtr> Process::sys$inode_watcher_add_watch(Userspace<const Syscall::SC_inode_watcher_add_watch_params*> user_params)
|
|
{
|
|
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
|
|
REQUIRE_PROMISE(rpath);
|
|
|
|
Syscall::SC_inode_watcher_add_watch_params params;
|
|
if (!copy_from_user(¶ms, user_params))
|
|
return EFAULT;
|
|
|
|
auto description = fds().file_description(params.fd);
|
|
if (!description)
|
|
return EBADF;
|
|
if (!description->is_inode_watcher())
|
|
return EBADF;
|
|
auto inode_watcher = description->inode_watcher();
|
|
|
|
auto path = get_syscall_path_argument(params.user_path);
|
|
if (path.is_error())
|
|
return path.error();
|
|
|
|
auto custody_or_error = VirtualFileSystem::the().resolve_path(path.value()->view(), current_directory());
|
|
if (custody_or_error.is_error())
|
|
return custody_or_error.error();
|
|
|
|
auto& custody = custody_or_error.value();
|
|
if (!custody->inode().fs().supports_watchers())
|
|
return ENOTSUP;
|
|
|
|
auto wd_or_error = inode_watcher->register_inode(custody->inode(), params.event_mask);
|
|
if (wd_or_error.is_error())
|
|
return wd_or_error.error();
|
|
return wd_or_error.value();
|
|
}
|
|
|
|
KResultOr<FlatPtr> Process::sys$inode_watcher_remove_watch(int fd, int wd)
|
|
{
|
|
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
|
|
auto description = fds().file_description(fd);
|
|
if (!description)
|
|
return EBADF;
|
|
if (!description->is_inode_watcher())
|
|
return EBADF;
|
|
auto inode_watcher = description->inode_watcher();
|
|
|
|
auto result = inode_watcher->unregister_by_wd(wd);
|
|
if (result.is_error())
|
|
return result;
|
|
|
|
return 0;
|
|
}
|
|
|
|
}
|