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
  27 static 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
  40 QIOChannel *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 }