71 lines
1.2 KiB
C
71 lines
1.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) International Business Machines Corp., 2001
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* 07/2001 Ported by Wayne Boyer
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* Copyright (c) 2021 Xie Ziyao <xieziyao@huawei.com>
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*/
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/*\
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* [Description]
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*
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* Check that the parent's file descriptors will not be affected by being
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* closed in the child.
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*/
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#include <stdlib.h>
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#include "tst_test.h"
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#define TESTFILE "testfile_fork08"
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static int fd;
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static char buf;
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static void run(void)
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{
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int ret;
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fd = SAFE_OPEN(TESTFILE, O_RDONLY);
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if (!SAFE_FORK()) {
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SAFE_CLOSE(fd);
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exit(0);
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}
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if (!SAFE_FORK()) {
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SAFE_READ(1, fd, &buf, 1);
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if (buf != 'a')
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tst_res(TFAIL, "%6d: read '%c' instead of 'a'",
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getpid(), buf);
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SAFE_CLOSE(fd);
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exit(0);
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}
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tst_reap_children();
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ret = read(fd, &buf, 1);
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if (ret == 0)
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tst_res(TPASS, "read the end of file correctly");
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else
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tst_res(TFAIL | TERRNO, "read() returns %d, expected 0", ret);
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SAFE_CLOSE(fd);
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}
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static void setup(void)
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{
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tst_fill_file(TESTFILE, 'a', 1, 1);
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}
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static void cleanup(void)
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{
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if (fd > 0)
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SAFE_CLOSE(fd);
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}
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static struct tst_test test = {
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.forks_child = 1,
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.needs_tmpdir = 1,
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.cleanup = cleanup,
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.setup = setup,
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.test_all = run,
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};
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