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https://github.com/SerenityOS/serenity
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a9204510a4
Instead of checking it at every call site (to generate EBADF), we make file_description(fd) return a KResultOr<NonnullRefPtr<FileDescription>>. This allows us to wrap all the calls in TRY(). :^) The only place that got a little bit messier from this is sys$mount(), and there's a whole bunch of things there in need of cleanup.
56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/FileSystem/FileDescription.h>
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#include <Kernel/Net/LocalSocket.h>
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#include <Kernel/Process.h>
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namespace Kernel {
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KResultOr<FlatPtr> Process::sys$sendfd(int sockfd, int fd)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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REQUIRE_PROMISE(sendfd);
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auto socket_description = TRY(fds().file_description(sockfd));
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if (!socket_description->is_socket())
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return ENOTSOCK;
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auto& socket = *socket_description->socket();
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if (!socket.is_local())
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return EAFNOSUPPORT;
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if (!socket.is_connected())
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return ENOTCONN;
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auto passing_descriptor = TRY(fds().file_description(fd));
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auto& local_socket = static_cast<LocalSocket&>(socket);
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return local_socket.sendfd(*socket_description, *passing_descriptor);
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}
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KResultOr<FlatPtr> Process::sys$recvfd(int sockfd, int options)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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REQUIRE_PROMISE(recvfd);
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auto socket_description = TRY(fds().file_description(sockfd));
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if (!socket_description->is_socket())
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return ENOTSOCK;
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auto& socket = *socket_description->socket();
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if (!socket.is_local())
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return EAFNOSUPPORT;
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auto fd_allocation = TRY(m_fds.allocate());
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auto& local_socket = static_cast<LocalSocket&>(socket);
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auto received_description = TRY(local_socket.recvfd(*socket_description));
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u32 fd_flags = 0;
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if (options & O_CLOEXEC)
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fd_flags |= FD_CLOEXEC;
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m_fds[fd_allocation.fd].set(move(received_description), fd_flags);
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return fd_allocation.fd;
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}
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}
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