1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2014 Fujitsu Ltd.
4 * Author: Xing Gu <gux.fnst@cn.fujitsu.com>
5 */
6/*
7 * Description:
8 *   Verify that,
9 *   1) tee() returns -1 and sets errno to EINVAL if fd_in does
10 *      not refer to a pipe.
11 *   2) tee() returns -1 and sets errno to EINVAL if fd_out does
12 *      not refer to a pipe.
13 *   3) tee() returns -1 and sets errno to EINVAL if fd_in and
14 *      fd_out refer to the same pipe.
15 */
16
17#define _GNU_SOURCE
18
19#include <sys/types.h>
20#include <sys/stat.h>
21#include <fcntl.h>
22#include <unistd.h>
23
24#include "tst_test.h"
25#include "lapi/tee.h"
26
27#define TEST_FILE "testfile"
28
29#define STR "abcdefghigklmnopqrstuvwxyz"
30#define TEE_TEST_LEN 10
31
32static int fd;
33static int pipes[2];
34
35static struct tcase {
36	int *fdin;
37	int *fdout;
38	int exp_errno;
39} tcases[] = {
40	{ &fd, &pipes[1], EINVAL },
41	{ &pipes[0], &fd, EINVAL },
42	{ &pipes[0], &pipes[1], EINVAL },
43};
44
45static void setup(void)
46{
47	fd = SAFE_OPEN(TEST_FILE, O_RDWR | O_CREAT, 0644);
48	SAFE_PIPE(pipes);
49	SAFE_WRITE(SAFE_WRITE_ALL, pipes[1], STR, sizeof(STR) - 1);
50}
51
52static void tee_verify(unsigned int n)
53{
54	struct tcase *tc = &tcases[n];
55
56	TEST(tee(*(tc->fdin), *(tc->fdout), TEE_TEST_LEN, 0));
57
58	if (TST_RET != -1) {
59		tst_res(TFAIL, "tee() returned %ld, "
60			"expected -1, errno:%d", TST_RET,
61			tc->exp_errno);
62		return;
63	}
64
65	if (TST_ERR != tc->exp_errno) {
66		tst_res(TFAIL | TTERRNO,
67			"tee() failed unexpectedly; expected: %d - %s",
68			tc->exp_errno, tst_strerrno(tc->exp_errno));
69		return;
70	}
71
72	tst_res(TPASS | TTERRNO, "tee() failed as expected");
73}
74
75static void cleanup(void)
76{
77	if (fd > 0)
78		SAFE_CLOSE(fd);
79
80	if (pipes[0] > 0)
81		SAFE_CLOSE(pipes[0]);
82
83	if (pipes[1] > 0)
84		SAFE_CLOSE(pipes[1]);
85}
86
87static struct tst_test test = {
88	.setup = setup,
89	.cleanup = cleanup,
90	.test = tee_verify,
91	.tcnt = ARRAY_SIZE(tcases),
92	.needs_tmpdir = 1,
93};
94