mirror of
https://github.com/RGBCube/serenity
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bad6d50b86
This change lays the foundation for making the require_promise return an error hand handling the process abort outside of the syscall implementations, to avoid cases where we would leak resources. It also has the advantage that it makes removes a gs pointer read to look up the current thread, then process for every syscall. We can instead go through the Process this pointer in most cases.
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/OpenFileDescription.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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ErrorOr<FlatPtr> Process::sys$sendfd(int sockfd, int fd)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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require_promise(Pledge::sendfd);
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auto socket_description = TRY(fds().open_file_description(sockfd));
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if (!socket_description->is_socket())
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return ENOTSOCK;
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auto& socket = *socket_description->socket();
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if (!socket.is_local())
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return EAFNOSUPPORT;
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if (!socket.is_connected())
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return ENOTCONN;
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auto passing_description = TRY(fds().open_file_description(fd));
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auto& local_socket = static_cast<LocalSocket&>(socket);
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TRY(local_socket.sendfd(*socket_description, move(passing_description)));
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return 0;
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}
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ErrorOr<FlatPtr> Process::sys$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(Pledge::recvfd);
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auto socket_description = TRY(fds().open_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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