From c767ae62b9efb2c9b2a757984ff1b14f89b49249 Mon Sep 17 00:00:00 2001 From: "Daniel P. Berrange" Date: Wed, 3 Feb 2016 14:00:28 +0000 Subject: io: introduce helper for creating channels from file descriptors Depending on what object a file descriptor refers to a different type of IO channel will be needed - either a QIOChannelFile or a QIOChannelSocket. Introduce a qio_channel_new_fd() method which will return the appropriate channel implementation. Reviewed-by: Eric Blake Signed-off-by: Daniel P. Berrange --- io/channel-util.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 io/channel-util.c (limited to 'io/channel-util.c') diff --git a/io/channel-util.c b/io/channel-util.c new file mode 100644 index 0000000000..f96907cb5c --- /dev/null +++ b/io/channel-util.c @@ -0,0 +1,50 @@ +/* + * QEMU I/O channels utility APIs + * + * Copyright (c) 2016 Red Hat, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see . + * + */ + +#include "io/channel-util.h" +#include "io/channel-file.h" +#include "io/channel-socket.h" + + +static bool fd_is_socket(int fd) +{ + int optval; + socklen_t optlen; + optlen = sizeof(optval); + return qemu_getsockopt(fd, + SOL_SOCKET, + SO_TYPE, + (char *)&optval, + &optlen) == 0; +} + + +QIOChannel *qio_channel_new_fd(int fd, + Error **errp) +{ + QIOChannel *ioc; + + if (fd_is_socket(fd)) { + ioc = QIO_CHANNEL(qio_channel_socket_new_fd(fd, errp)); + } else { + ioc = QIO_CHANNEL(qio_channel_file_new_fd(fd)); + } + return ioc; +} -- cgit v1.2.3