1 /*
2 * Copyright (c) International Business Machines Corp., 2001
3 * 06/2017 modified by Xiao Yang <yangx.jy@cn.fujitsu.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
17 */
18
19 /*
20 * Description:
21 * lseek() succeeds to set the specified offset according to whence
22 * and write valid data from this location.
23 */
24
25 #include <errno.h>
26 #include <string.h>
27 #include <sys/types.h>
28 #include <unistd.h>
29 #include "tst_test.h"
30
31 #define TFILE1 "tfile1"
32 #define TFILE2 "tfile2"
33 #define WR_STR1 "abcdefg"
34 #define WR_STR2 "ijk"
35
36 static int fd1, fd2;
37 static struct tcase {
38 int *fd;
39 char *fname;
40 off_t off;
41 off_t exp_off;
42 int exp_size;
43 char *exp_data;
44 } tcases[] = {
45 {&fd1, TFILE1, 7, 7, 10, "abcdefgijk"},
46 {&fd2, TFILE2, 2, 2, 7, "abijkfg"},
47 };
48
verify_lseek(unsigned int n)49 static void verify_lseek(unsigned int n)
50 {
51 char read_buf[64];
52 struct tcase *tc = &tcases[n];
53
54 memset(read_buf, 0, sizeof(read_buf));
55
56 TEST(lseek(*tc->fd, tc->off, SEEK_SET));
57 if (TST_RET == (off_t) -1) {
58 tst_res(TFAIL | TTERRNO, "lseek(%s, %ld, SEEK_SET) failed",
59 tc->fname, tc->off);
60 return;
61 }
62
63 if (TST_RET != tc->exp_off) {
64 tst_res(TFAIL, "lseek(%s, %ld, SEEK_SET) returned %ld, expected %ld",
65 tc->fname, tc->off, TST_RET, tc->exp_off);
66 return;
67 }
68
69 SAFE_WRITE(1, *tc->fd, WR_STR2, sizeof(WR_STR2) - 1);
70
71 SAFE_CLOSE(*tc->fd);
72
73 *tc->fd = SAFE_OPEN(tc->fname, O_RDWR);
74
75 SAFE_READ(1, *tc->fd, read_buf, tc->exp_size);
76
77 if (strcmp(read_buf, tc->exp_data)) {
78 tst_res(TFAIL, "lseek(%s, %ld, SEEK_SET) wrote incorrect data %s",
79 tc->fname, tc->off, read_buf);
80 } else {
81 tst_res(TPASS, "lseek(%s, %ld, SEEK_SET) wrote correct data %s",
82 tc->fname, tc->off, read_buf);
83 }
84 }
85
setup(void)86 static void setup(void)
87 {
88 fd1 = SAFE_OPEN(TFILE1, O_RDWR | O_CREAT, 0644);
89 fd2 = SAFE_OPEN(TFILE2, O_RDWR | O_CREAT, 0644);
90
91 SAFE_WRITE(1, fd1, WR_STR1, sizeof(WR_STR1) - 1);
92 SAFE_WRITE(1, fd2, WR_STR1, sizeof(WR_STR1) - 1);
93 }
94
cleanup(void)95 static void cleanup(void)
96 {
97 if (fd1 > 0)
98 SAFE_CLOSE(fd1);
99
100 if (fd2 > 0)
101 SAFE_CLOSE(fd2);
102 }
103
104 static struct tst_test test = {
105 .setup = setup,
106 .cleanup = cleanup,
107 .tcnt = ARRAY_SIZE(tcases),
108 .test = verify_lseek,
109 .needs_tmpdir = 1,
110 };
111