| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Copyright (c) 2017 Carlo Marcelo Arenas Belon <carlo@gmail.com> |
| * Copyright (c) 2018 Cyril Hrubis <chrubis@suse.cz> |
| */ |
| /* |
| * Tests for a special case NULL buffer with size 0 is expected to return 0. |
| */ |
| |
| #include <errno.h> |
| #include "tst_test.h" |
| |
| static int fd; |
| |
| static void verify_write(void) |
| { |
| TEST(write(fd, NULL, 0)); |
| |
| if (TST_RET != 0) { |
| tst_res(TFAIL | TTERRNO, |
| "write() should have succeeded with ret=0"); |
| return; |
| } |
| |
| tst_res(TPASS, "write(fd, NULL, 0) == 0"); |
| } |
| |
| static void setup(void) |
| { |
| fd = SAFE_OPEN("test_file", O_RDWR | O_CREAT, 0700); |
| } |
| |
| static void cleanup(void) |
| { |
| if (fd > 0) |
| SAFE_CLOSE(fd); |
| } |
| |
| static struct tst_test test = { |
| .setup = setup, |
| .cleanup = cleanup, |
| .test_all = verify_write, |
| .needs_tmpdir = 1, |
| }; |
