/* Common function for preadv2 and pwritev2 tests. Copyright (C) 2017 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 <limits.h> #include <support/check.h> static void do_test_with_invalid_flags (void) { #define RWF_SUPPORTED (RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT) /* Set the next bit from the mask of all supported flags. */ int invalid_flag = __builtin_clz (RWF_SUPPORTED); invalid_flag = 0x1 << ((sizeof (int) * CHAR_BIT) - invalid_flag); char buf[32]; const struct iovec vec = { .iov_base = buf, .iov_len = sizeof (buf) }; if (preadv2 (temp_fd, &vec, 1, 0, invalid_flag) != -1) FAIL_EXIT1 ("preadv2 did not fail with an invalid flag"); if (errno != ENOTSUP) FAIL_EXIT1 ("preadv2 failure did not set errno to ENOTSUP (%d)", errno); /* This might fail for compat syscall (32 bits running on 64 bits kernel) due a kernel issue. */ if (pwritev2 (temp_fd, &vec, 1, 0, invalid_flag) != -1) FAIL_EXIT1 ("pwritev2 did not fail with an invalid flag"); if (errno != ENOTSUP) FAIL_EXIT1 ("pwritev2 failure did not set errno to ENOTSUP (%d)", errno); }