1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2001
4 */
5
6 /*
7 * Basic test for pipe().
8 */
9
10 #include <errno.h>
11 #include <string.h>
12 #include "tst_test.h"
13
14 static int fds[2];
15
verify_pipe(void)16 static void verify_pipe(void)
17 {
18 int rd_size, wr_size;
19 char wrbuf[] = "abcdefghijklmnopqrstuvwxyz";
20 char rdbuf[128];
21
22 memset(rdbuf, 0, sizeof(rdbuf));
23
24 TEST(pipe(fds));
25
26 if (TST_RET == -1) {
27 tst_res(TFAIL | TTERRNO, "pipe()");
28 return;
29 }
30
31 wr_size = SAFE_WRITE(SAFE_WRITE_ALL, fds[1], wrbuf, sizeof(wrbuf));
32 rd_size = SAFE_READ(0, fds[0], rdbuf, sizeof(rdbuf));
33
34 if (rd_size != wr_size) {
35 tst_res(TFAIL, "read() returned %d, expected %d",
36 rd_size, wr_size);
37 return;
38 }
39
40 if ((strncmp(rdbuf, wrbuf, wr_size)) != 0) {
41 tst_res(TFAIL, "Wrong data were read back");
42 return;
43 }
44
45 SAFE_CLOSE(fds[0]);
46 SAFE_CLOSE(fds[1]);
47
48 tst_res(TPASS, "pipe() functionality is correct");
49 }
50
51 static struct tst_test test = {
52 .test_all = verify_pipe,
53 };
54