1f08c3bdfSopenharmony_ci// SPDX-License-Identifier: GPL-2.0-or-later 2f08c3bdfSopenharmony_ci/* 3f08c3bdfSopenharmony_ci * Copyright (c) 2021 FUJITSU LIMITED. All rights reserved. 4f08c3bdfSopenharmony_ci * Author: Yang Xu <xuyang2018.jy@fujitsu.com> 5f08c3bdfSopenharmony_ci */ 6f08c3bdfSopenharmony_ci 7f08c3bdfSopenharmony_ci/*\ 8f08c3bdfSopenharmony_ci * [Description] 9f08c3bdfSopenharmony_ci * 10f08c3bdfSopenharmony_ci * If oldfd is a valid file descriptor, and newfd has the same value as oldfd, 11f08c3bdfSopenharmony_ci * then dup2() does nothing, and returns newfd. 12f08c3bdfSopenharmony_ci */ 13f08c3bdfSopenharmony_ci 14f08c3bdfSopenharmony_ci#include <stdio.h> 15f08c3bdfSopenharmony_ci#include <unistd.h> 16f08c3bdfSopenharmony_ci#include "tst_test.h" 17f08c3bdfSopenharmony_ci 18f08c3bdfSopenharmony_cistatic int fd = -1; 19f08c3bdfSopenharmony_ci 20f08c3bdfSopenharmony_cistatic void verify_dup2(void) 21f08c3bdfSopenharmony_ci{ 22f08c3bdfSopenharmony_ci TST_EXP_FD_SILENT(dup2(fd, fd), "dup2(%d, %d)", fd, fd); 23f08c3bdfSopenharmony_ci 24f08c3bdfSopenharmony_ci if (TST_RET != fd) { 25f08c3bdfSopenharmony_ci tst_res(TFAIL, "dup2(%d, %d) returns wrong newfd(%ld)", fd, fd, TST_RET); 26f08c3bdfSopenharmony_ci SAFE_CLOSE(TST_RET); 27f08c3bdfSopenharmony_ci return; 28f08c3bdfSopenharmony_ci } 29f08c3bdfSopenharmony_ci tst_res(TPASS, "dup2(%d, %d) returns newfd(%d)", fd, fd, fd); 30f08c3bdfSopenharmony_ci} 31f08c3bdfSopenharmony_ci 32f08c3bdfSopenharmony_cistatic void setup(void) 33f08c3bdfSopenharmony_ci{ 34f08c3bdfSopenharmony_ci fd = SAFE_OPEN("testfile", O_RDWR | O_CREAT, 0666); 35f08c3bdfSopenharmony_ci} 36f08c3bdfSopenharmony_ci 37f08c3bdfSopenharmony_cistatic void cleanup(void) 38f08c3bdfSopenharmony_ci{ 39f08c3bdfSopenharmony_ci if (fd > -1) 40f08c3bdfSopenharmony_ci SAFE_CLOSE(fd); 41f08c3bdfSopenharmony_ci} 42f08c3bdfSopenharmony_ci 43f08c3bdfSopenharmony_cistatic struct tst_test test = { 44f08c3bdfSopenharmony_ci .needs_tmpdir = 1, 45f08c3bdfSopenharmony_ci .setup = setup, 46f08c3bdfSopenharmony_ci .cleanup = cleanup, 47f08c3bdfSopenharmony_ci .test_all = verify_dup2, 48f08c3bdfSopenharmony_ci}; 49