LXR qemu/io/channel-util.c

   1/*
   2 * QEMU I/O channels utility APIs
   3 *
   4 * Copyright (c) 2016 Red Hat, Inc.
   5 *
   6 * This library is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU Lesser General Public
   8 * License as published by the Free Software Foundation; either
   9 * version 2 of the License, or (at your option) any later version.
  10 *
  11 * This library is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 * Lesser General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU Lesser General Public
  17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18 *
  19 */
  20
  21#include "qemu/osdep.h"
  22#include "io/channel-util.h"
  23#include "io/channel-file.h"
  24#include "io/channel-socket.h"
  25
  26
  27static bool fd_is_socket(int fd)
  28{
  29    int optval;
  30    socklen_t optlen;
  31    optlen = sizeof(optval);
  32    return qemu_getsockopt(fd,
  33                           SOL_SOCKET,
  34                           SO_TYPE,
  35                           (char *)&optval,
  36                           &optlen) == 0;
  37}
  38
  39
  40QIOChannel *qio_channel_new_fd(int fd,
  41                               Error **errp)
  42{
  43    QIOChannel *ioc;
  44
  45    if (fd_is_socket(fd)) {
  46        ioc = QIO_CHANNEL(qio_channel_socket_new_fd(fd, errp));
  47    } else {
  48        ioc = QIO_CHANNEL(qio_channel_file_new_fd(fd));
  49    }
  50    return ioc;
  51}
  52