tst-sysconf-iov_max.c 1.4 KB

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  1. /* Check IOV_MAX definition for consistency (bug 22321).
  2. Copyright (C) 2017-2019 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, see
  14. <http://www.gnu.org/licenses/>. */
  15. /* Defined in tst-sysconf-iov_max-uapi.c. */
  16. long uio_maxiov_value (void);
  17. #include <limits.h>
  18. #include <support/check.h>
  19. #include <sys/uio.h>
  20. #include <unistd.h>
  21. static int
  22. do_test (void)
  23. {
  24. TEST_VERIFY (_XOPEN_IOV_MAX == 16); /* Value required by POSIX. */
  25. TEST_VERIFY (uio_maxiov_value () >= _XOPEN_IOV_MAX);
  26. TEST_VERIFY (IOV_MAX == uio_maxiov_value ());
  27. TEST_VERIFY (UIO_MAXIOV == uio_maxiov_value ());
  28. TEST_VERIFY (sysconf (_SC_UIO_MAXIOV) == uio_maxiov_value ());
  29. TEST_VERIFY (sysconf (_SC_IOV_MAX) == uio_maxiov_value ());
  30. return 0;
  31. }
  32. #include <support/test-driver.c>