1 /* 2 * Copyright (c) 2017 Carlo Marcelo Arenas Belon <carlo (at) gmail.com> 3 * Copyright (c) 2018 Cyril Hrubis <chrubis (at) suse.cz> 4 * 5 * This program is free software: you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation, either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program 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 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. 17 */ 18 /* 19 * Tests for a special case NULL buffer with size 0 is expected to return 0. 20 */ 21 22 #include <errno.h> 23 #include "tst_test.h" 24 25 static int fd; 26 27 static void verify_pwrite(void) 28 { 29 TEST(pwrite(fd, NULL, 0, 0)); 30 31 if (TST_RET != 0) { 32 tst_res(TFAIL | TTERRNO, 33 "pwrite() should have succeeded with ret=0"); 34 return; 35 } 36 37 tst_res(TPASS, "pwrite(fd, NULL, 0) == 0"); 38 } 39 40 static void setup(void) 41 { 42 fd = SAFE_OPEN("test_file", O_RDWR | O_CREAT, 0700); 43 } 44 45 static void cleanup(void) 46 { 47 if (fd > 0) 48 SAFE_CLOSE(fd); 49 } 50 51 static struct tst_test test = { 52 .setup = setup, 53 .cleanup = cleanup, 54 .test_all = verify_pwrite, 55 .needs_tmpdir = 1, 56 }; 57
