1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
4 * Copyright (c) 2017 Fujitsu Ltd.
5 */
6
7 #include <errno.h>
8 #include "tst_test.h"
9
10 #define SIZE 512
11
12 static int fd;
13 static char buf[SIZE];
14
verify_read(void)15 static void verify_read(void)
16 {
17 SAFE_LSEEK(fd, 0, SEEK_SET);
18
19 TEST(read(fd, buf, SIZE));
20
21 if (TST_RET == -1)
22 tst_res(TFAIL | TTERRNO, "read(2) failed");
23 else
24 tst_res(TPASS, "read(2) returned %ld", TST_RET);
25 }
26
setup(void)27 static void setup(void)
28 {
29 memset(buf, '*', SIZE);
30 fd = SAFE_OPEN("testfile", O_RDWR | O_CREAT, 0700);
31 SAFE_WRITE(1, fd, buf, SIZE);
32 }
33
cleanup(void)34 static void cleanup(void)
35 {
36 if (fd > 0)
37 SAFE_CLOSE(fd);
38 }
39
40 static struct tst_test test = {
41 .test_all = verify_read,
42 .setup = setup,
43 .cleanup = cleanup,
44 .needs_tmpdir = 1,
45 };
46