1f08c3bdfSopenharmony_ci// SPDX-License-Identifier: GPL-2.0-or-later 2f08c3bdfSopenharmony_ci/* 3f08c3bdfSopenharmony_ci * Copyright (c) International Business Machines Corp., 2001 4f08c3bdfSopenharmony_ci * 07/2001 Ported by Wayne Boyer 5f08c3bdfSopenharmony_ci * Copyright (c) 2021 Xie Ziyao <xieziyao@huawei.com> 6f08c3bdfSopenharmony_ci */ 7f08c3bdfSopenharmony_ci 8f08c3bdfSopenharmony_ci/*\ 9f08c3bdfSopenharmony_ci * [Description] 10f08c3bdfSopenharmony_ci * 11f08c3bdfSopenharmony_ci * Check that the parent's file descriptors will not be affected by being 12f08c3bdfSopenharmony_ci * closed in the child. 13f08c3bdfSopenharmony_ci */ 14f08c3bdfSopenharmony_ci 15f08c3bdfSopenharmony_ci#include <stdlib.h> 16f08c3bdfSopenharmony_ci 17f08c3bdfSopenharmony_ci#include "tst_test.h" 18f08c3bdfSopenharmony_ci 19f08c3bdfSopenharmony_ci#define TESTFILE "testfile_fork08" 20f08c3bdfSopenharmony_ci 21f08c3bdfSopenharmony_cistatic int fd; 22f08c3bdfSopenharmony_cistatic char buf; 23f08c3bdfSopenharmony_ci 24f08c3bdfSopenharmony_cistatic void run(void) 25f08c3bdfSopenharmony_ci{ 26f08c3bdfSopenharmony_ci int ret; 27f08c3bdfSopenharmony_ci 28f08c3bdfSopenharmony_ci fd = SAFE_OPEN(TESTFILE, O_RDONLY); 29f08c3bdfSopenharmony_ci if (!SAFE_FORK()) { 30f08c3bdfSopenharmony_ci SAFE_CLOSE(fd); 31f08c3bdfSopenharmony_ci exit(0); 32f08c3bdfSopenharmony_ci } 33f08c3bdfSopenharmony_ci 34f08c3bdfSopenharmony_ci if (!SAFE_FORK()) { 35f08c3bdfSopenharmony_ci SAFE_READ(1, fd, &buf, 1); 36f08c3bdfSopenharmony_ci if (buf != 'a') 37f08c3bdfSopenharmony_ci tst_res(TFAIL, "%6d: read '%c' instead of 'a'", 38f08c3bdfSopenharmony_ci getpid(), buf); 39f08c3bdfSopenharmony_ci SAFE_CLOSE(fd); 40f08c3bdfSopenharmony_ci exit(0); 41f08c3bdfSopenharmony_ci } 42f08c3bdfSopenharmony_ci tst_reap_children(); 43f08c3bdfSopenharmony_ci 44f08c3bdfSopenharmony_ci ret = read(fd, &buf, 1); 45f08c3bdfSopenharmony_ci if (ret == 0) 46f08c3bdfSopenharmony_ci tst_res(TPASS, "read the end of file correctly"); 47f08c3bdfSopenharmony_ci else 48f08c3bdfSopenharmony_ci tst_res(TFAIL | TERRNO, "read() returns %d, expected 0", ret); 49f08c3bdfSopenharmony_ci 50f08c3bdfSopenharmony_ci SAFE_CLOSE(fd); 51f08c3bdfSopenharmony_ci} 52f08c3bdfSopenharmony_ci 53f08c3bdfSopenharmony_cistatic void setup(void) 54f08c3bdfSopenharmony_ci{ 55f08c3bdfSopenharmony_ci tst_fill_file(TESTFILE, 'a', 1, 1); 56f08c3bdfSopenharmony_ci} 57f08c3bdfSopenharmony_ci 58f08c3bdfSopenharmony_cistatic void cleanup(void) 59f08c3bdfSopenharmony_ci{ 60f08c3bdfSopenharmony_ci if (fd > 0) 61f08c3bdfSopenharmony_ci SAFE_CLOSE(fd); 62f08c3bdfSopenharmony_ci} 63f08c3bdfSopenharmony_ci 64f08c3bdfSopenharmony_cistatic struct tst_test test = { 65f08c3bdfSopenharmony_ci .forks_child = 1, 66f08c3bdfSopenharmony_ci .needs_tmpdir = 1, 67f08c3bdfSopenharmony_ci .cleanup = cleanup, 68f08c3bdfSopenharmony_ci .setup = setup, 69f08c3bdfSopenharmony_ci .test_all = run, 70f08c3bdfSopenharmony_ci}; 71