1 /*
2 * Copyright (c) 2014 Fujitsu Ltd.
3 * Author: Xiaoguang Wang <wangxg.fnst@cn.fujitsu.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 *
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16 */
17
18 /*
19 * Description:
20 * Verify that,
21 * 1. llseek() succeeds to set the file pointer position to the current
22 * specified location, when 'whence' value is set to SEEK_CUR and the data
23 * read from the specified location should match the expected data.
24 * 2. llseek() succeeds to set the file pointer position to the end of
25 * the file when 'whence' value set to SEEK_END and any attempts to read
26 * from that position should return 0.
27 *
28 */
29
30 #define _GNU_SOURCE
31
32 #include <unistd.h>
33 #include <errno.h>
34 #include <unistd.h>
35 #include <fcntl.h>
36 #include <utime.h>
37 #include <string.h>
38 #include <signal.h>
39 #include <sys/resource.h>
40 #include <sys/stat.h>
41 #include <sys/types.h>
42 #include <inttypes.h>
43
44 #include "test.h"
45 #include "safe_macros.h"
46
47 #define TEST_FILE "testfile"
48
49 static void setup(void);
50 static void cleanup(void);
51
52 static void testfunc_seekcur(void);
53 static void testfunc_seekend(void);
54
55 static void (*testfunc[])(void) = { testfunc_seekcur, testfunc_seekend };
56
57 char *TCID = "llseek03";
58 int TST_TOTAL = 2;
59
60 static size_t file_size;
61
main(int ac,char ** av)62 int main(int ac, char **av)
63 {
64 int i, lc;
65
66 tst_parse_opts(ac, av, NULL, NULL);
67
68 setup();
69
70 for (lc = 0; TEST_LOOPING(lc); lc++) {
71 tst_count = 0;
72
73 for (i = 0; i < TST_TOTAL; i++)
74 (*testfunc[i])();
75 }
76
77 cleanup();
78 tst_exit();
79 }
80
setup(void)81 static void setup(void)
82 {
83 int fd;
84 struct stat stat_buf;
85
86 tst_sig(NOFORK, DEF_HANDLER, cleanup);
87
88 tst_tmpdir();
89
90 TEST_PAUSE;
91
92 fd = SAFE_CREAT(cleanup, TEST_FILE, 0644);
93
94 #define STR "abcdefgh"
95 SAFE_WRITE(cleanup, 1, fd, STR, sizeof(STR) - 1);
96
97 SAFE_FSTAT(cleanup, fd, &stat_buf);
98
99 SAFE_CLOSE(cleanup, fd);
100
101 file_size = stat_buf.st_size;
102 }
103
testfunc_seekcur(void)104 static void testfunc_seekcur(void)
105 {
106 int fd;
107 static char read_buf[BUFSIZ];
108
109 /* reopen TEST_FILE and file offset will be 0 */
110 fd = SAFE_OPEN(cleanup, TEST_FILE, O_RDONLY);
111
112 /* after read, file offset will be 4 */
113 SAFE_READ(cleanup, 1, fd, read_buf, 4);
114
115 TEST(lseek64(fd, (loff_t) 1, SEEK_CUR));
116
117 if (TEST_RETURN == (loff_t) -1) {
118 tst_resm(TFAIL | TTERRNO, "llseek failed on %s ", TEST_FILE);
119 goto cleanup_seekcur;
120 }
121
122 if (TEST_RETURN != 5) {
123 tst_resm(TFAIL, "llseek return a incorrect file offset");
124 goto cleanup_seekcur;
125 }
126
127 memset(read_buf, 0, sizeof(read_buf));
128
129 /* the expected characters are "fgh" */
130 SAFE_READ(cleanup, 1, fd, read_buf, 3);
131
132 if (strcmp(read_buf, "fgh"))
133 tst_resm(TFAIL, "Read wrong bytes after llseek");
134 else
135 tst_resm(TPASS, "test SEEK_SET for llseek success");
136
137 cleanup_seekcur:
138 SAFE_CLOSE(cleanup, fd);
139 }
140
141
testfunc_seekend(void)142 static void testfunc_seekend(void)
143 {
144 int fd;
145 ssize_t nread;
146 static char read_buf[BUFSIZ];
147
148 /* reopen TEST_FILE and file offset will be 0 */
149 fd = SAFE_OPEN(cleanup, TEST_FILE, O_RDONLY);
150
151 TEST(lseek64(fd, (loff_t) 0, SEEK_END));
152
153 if (TEST_RETURN == (loff_t) -1) {
154 tst_resm(TFAIL | TTERRNO, "llseek failed on %s ", TEST_FILE);
155 goto cleanup_seekend;
156 }
157
158 if (TEST_RETURN != (long)file_size) {
159 tst_resm(TFAIL, "llseek return a incorrect file offset");
160 goto cleanup_seekend;
161 }
162
163 memset(read_buf, 0, sizeof(read_buf));
164
165 nread = SAFE_READ(cleanup, 0, fd, read_buf, file_size);
166 if (nread > 0)
167 tst_resm(TFAIL, "Read bytes after llseek to end of file");
168 else
169 tst_resm(TPASS, "test SEEK_END for llseek success");
170
171 cleanup_seekend:
172 SAFE_CLOSE(cleanup, fd);
173 }
174
cleanup(void)175 static void cleanup(void)
176 {
177 tst_rmdir();
178 }
179