glibc/support/xsendto.c

/* sendto with error checking.
   Copyright (C) 2016-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C 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 2.1 of the License, or (at your option) any later version.

   The GNU C 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 the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <support/xsocket.h>

#include <stdio.h>
#include <stdlib.h>
#include <support/check.h>

void
xsendto (int fd, const void *buf, size_t buflen, int flags,
         const struct sockaddr *sa, socklen_t salen)
{
  ssize_t ret = sendto (fd, buf, buflen, flags, sa, salen);
  if (ret < 0)
    FAIL_EXIT1 ("sendto (%d), %zu bytes, family %d: %m",
                fd, buflen, sa->sa_family);
  if (ret != buflen)
    FAIL_EXIT1 ("sendto (%d) sent %zd bytes instead of %zu", fd, ret, buflen);
}