diff options
Diffstat (limited to 'io/tst-read-zero.c')
-rw-r--r-- | io/tst-read-zero.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/io/tst-read-zero.c b/io/tst-read-zero.c new file mode 100644 index 0000000000..8d1d30a543 --- /dev/null +++ b/io/tst-read-zero.c @@ -0,0 +1,39 @@ +/* read smoke test for 0-sized structures. + Copyright The GNU Toolchain Authors. + 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 + <https://www.gnu.org/licenses/>. */ + +/* Zero-sized structures should not result in any overflow warnings or + errors when fortification is enabled. */ +#include <fcntl.h> +#include <stdio.h> +#include <unistd.h> +#include <support/check.h> + +int +do_test (void) +{ + struct test_st {} test_info[16]; + int fd = open ("/dev/zero", O_RDONLY, 0); + + if (fd == -1) + FAIL_UNSUPPORTED ("Unable to open /dev/zero: %m"); + + TEST_VERIFY_EXIT (read (fd, test_info, sizeof(test_info)) == 0); + return 0; +} + +#include <support/test-driver.c> |