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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. :^)
66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, sin-ack <sin-ack@protonmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/API/InodeWatcherFlags.h>
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#include <Kernel/FileSystem/Custody.h>
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#include <Kernel/FileSystem/InodeWatcher.h>
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#include <Kernel/FileSystem/OpenFileDescription.h>
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#include <Kernel/Process.h>
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namespace Kernel {
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ErrorOr<FlatPtr> Process::sys$create_inode_watcher(u32 flags)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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REQUIRE_PROMISE(rpath);
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auto fd_allocation = TRY(m_fds.allocate());
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auto watcher = TRY(InodeWatcher::try_create());
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auto description = TRY(OpenFileDescription::try_create(move(watcher)));
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description->set_readable(true);
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if (flags & static_cast<unsigned>(InodeWatcherFlags::Nonblock))
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description->set_blocking(false);
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m_fds[fd_allocation.fd].set(move(description));
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if (flags & static_cast<unsigned>(InodeWatcherFlags::CloseOnExec))
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m_fds[fd_allocation.fd].set_flags(m_fds[fd_allocation.fd].flags() | FD_CLOEXEC);
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return fd_allocation.fd;
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}
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ErrorOr<FlatPtr> Process::sys$inode_watcher_add_watch(Userspace<const Syscall::SC_inode_watcher_add_watch_params*> user_params)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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REQUIRE_PROMISE(rpath);
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auto params = TRY(copy_typed_from_user(user_params));
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auto description = TRY(fds().open_file_description(params.fd));
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if (!description->is_inode_watcher())
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return EBADF;
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auto inode_watcher = description->inode_watcher();
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auto path = TRY(get_syscall_path_argument(params.user_path));
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auto custody = TRY(VirtualFileSystem::the().resolve_path(path->view(), current_directory()));
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if (!custody->inode().fs().supports_watchers())
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return ENOTSUP;
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return TRY(inode_watcher->register_inode(custody->inode(), params.event_mask));
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}
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ErrorOr<FlatPtr> Process::sys$inode_watcher_remove_watch(int fd, int wd)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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auto description = TRY(fds().open_file_description(fd));
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if (!description->is_inode_watcher())
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return EBADF;
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TRY(description->inode_watcher()->unregister_by_wd(wd));
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return 0;
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}
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}
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