1  /* Check IOV_MAX definition for consistency (bug 22321).
       2     Copyright (C) 2017-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  /* Defined in tst-sysconf-iov_max-uapi.c.  */
      20  long uio_maxiov_value (void);
      21  
      22  
      23  #include <limits.h>
      24  #include <support/check.h>
      25  #include <sys/uio.h>
      26  #include <unistd.h>
      27  
      28  static int
      29  do_test (void)
      30  {
      31    TEST_VERIFY (_XOPEN_IOV_MAX == 16); /* Value required by POSIX.  */
      32    TEST_VERIFY (uio_maxiov_value () >= _XOPEN_IOV_MAX);
      33    TEST_VERIFY (IOV_MAX == uio_maxiov_value ());
      34    TEST_VERIFY (UIO_MAXIOV == uio_maxiov_value ());
      35    TEST_VERIFY (sysconf (_SC_UIO_MAXIOV) == uio_maxiov_value ());
      36    TEST_VERIFY (sysconf (_SC_IOV_MAX) == uio_maxiov_value ());
      37    return 0;
      38  }
      39  
      40  #include <support/test-driver.c>