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1a08ac72ad
This API was a mostly gratuitous deviation from POSIX that gave up some portability in exchange for avoiding the occasional strlen(). I don't think that was actually achieving anything valuable, so let's just chill out and have the same open() API as everyone else. :^)
108 lines
3.4 KiB
C++
108 lines
3.4 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <LibCore/LocalSocket.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#ifndef SOCK_NONBLOCK
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# include <sys/ioctl.h>
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#endif
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namespace Core {
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LocalSocket::LocalSocket(int fd, Object* parent)
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: Socket(Socket::Type::Local, parent)
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{
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// NOTE: This constructor is used by LocalServer::accept(), so the socket is already connected.
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m_connected = true;
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set_fd(fd);
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set_mode(IODevice::ReadWrite);
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set_error(0);
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}
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LocalSocket::LocalSocket(Object* parent)
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: Socket(Socket::Type::Local, parent)
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{
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#ifdef SOCK_NONBLOCK
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int fd = socket(AF_LOCAL, SOCK_STREAM | SOCK_NONBLOCK | SOCK_CLOEXEC, 0);
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#else
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int fd = socket(AF_LOCAL, SOCK_STREAM, 0);
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int option = 1;
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ioctl(fd, FIONBIO, &option);
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fcntl(fd, F_SETFD, FD_CLOEXEC);
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#endif
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if (fd < 0) {
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set_error(errno);
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} else {
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set_fd(fd);
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set_mode(IODevice::ReadWrite);
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set_error(0);
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}
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}
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LocalSocket::~LocalSocket()
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{
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}
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RefPtr<LocalSocket> LocalSocket::take_over_accepted_socket_from_system_server()
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{
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constexpr auto socket_takeover = "SOCKET_TAKEOVER";
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if (!getenv(socket_takeover))
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return nullptr;
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// The SystemServer has passed us the socket as fd 3,
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// so use that instead of creating our own.
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constexpr int fd = 3;
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// Sanity check: it has to be a socket.
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struct stat stat;
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int rc = fstat(fd, &stat);
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if (rc < 0 || !S_ISSOCK(stat.st_mode)) {
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if (rc != 0)
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perror("fstat");
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dbgln("ERROR: The fd we got from SystemServer is not a socket");
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return nullptr;
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}
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auto socket = LocalSocket::construct(fd);
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// It had to be !CLOEXEC for obvious reasons, but we
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// don't need it to be !CLOEXEC anymore, so set the
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// CLOEXEC flag now.
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fcntl(fd, F_SETFD, FD_CLOEXEC);
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// We wouldn't want our children to think we're passing
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// them a socket either, so unset the env variable.
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unsetenv(socket_takeover);
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return socket;
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}
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}
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