1 /*
2 *
3 * Copyright (c) International Business Machines Corp., 2001
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, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 /*
21 * Test Name: lseek06
22 *
23 * Test Description:
24 * Verify that, lseek() call succeeds to set the file pointer position
25 * to less than or equal to the file size, when a file is opened for
26 * read or write.
27 *
28 * Expected Result:
29 * lseek() should return the offset from the beginning of the file measured
30 * in bytes. Also check if able to read valid data from this location.
31 * $
32 * Algorithm:
33 * Setup:
34 * Setup signal handling.
35 * Pause for SIGUSR1 if option specified.
36 * Create temporary directory.
37 *
38 * Test:
39 * Loop if the proper options are given.
40 * Execute system call
41 * Check return code, if system call failed (return=-1)
42 * Log the errno and Issue a FAIL message.
43 * Otherwise,
44 * Verify the Functionality of system call
45 * if successful,
46 * Issue Functionality-Pass message.
47 * Otherwise,
48 * Issue Functionality-Fail message.
49 * Cleanup:
50 * Print errno log and/or timing stats if options given
51 * Delete the temporary directory created.
52 *
53 * Usage: <for command-line>
54 * lseek06 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
55 * where, -c n : Run n copies concurrently.
56 * -f : Turn off functionality Testing.
57 * -i n : Execute test n times.
58 * -I x : Execute test for x seconds.
59 * -P x : Pause for x seconds between iterations.
60 * -t : Turn on syscall timing.
61 *
62 * HISTORY
63 * 07/2001 Ported by Wayne Boyer
64 *
65 * RESTRICTIONS:
66 * None.
67 */
68
69 #include <stdio.h>
70 #include <unistd.h>
71 #include <sys/types.h>
72 #include <errno.h>
73 #include <fcntl.h>
74 #include <utime.h>
75 #include <string.h>
76 #include <sys/stat.h>
77 #include <signal.h>
78
79 #include "test.h"
80
81 #define OFFSET 4
82 #define TEMP_FILE "tmp_file"
83 #define FILE_MODE S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
84
85 char *TCID = "lseek06";
86 int TST_TOTAL = 1;
87 int fildes; /* file handle for temp file */
88
89 void setup(); /* Main setup function of test */
90 void cleanup(); /* cleanup function for the test */
91
main(int ac,char ** av)92 int main(int ac, char **av)
93 {
94 int lc;
95 char read_buf[1]; /* data read from temp. file */
96
97 tst_parse_opts(ac, av, NULL, NULL);
98
99 setup();
100
101 for (lc = 0; TEST_LOOPING(lc); lc++) {
102
103 tst_count = 0;
104
105 /*
106 * Invoke lseek(2) to move the read/write file
107 * pointer/handle by OFFSET bytes.
108 */
109 TEST(lseek(fildes, OFFSET, SEEK_SET));
110
111 if (TEST_RETURN == (off_t) - 1) {
112 tst_resm(TFAIL, "lseek on (%s) Failed, errno=%d : %s",
113 TEMP_FILE, TEST_ERRNO, strerror(TEST_ERRNO));
114 continue;
115 }
116 /*
117 * Check if the return value from lseek(2)
118 * is equal to the specified OFFSET value.
119 */
120 if (TEST_RETURN != OFFSET) {
121 tst_resm(TFAIL, "lseek() returned incorrect "
122 "value %ld, expected %d",
123 TEST_RETURN, OFFSET);
124 continue;
125 }
126 /*
127 * The return value is good, now check data.
128 * Read the data byte from this location.
129 */
130 if (read(fildes, &read_buf, sizeof(read_buf)) < 0) {
131 tst_brkm(TFAIL, cleanup, "read() failed "
132 "on %s, error=%d", TEMP_FILE, errno);
133 } else {
134 /*
135 * Check if read byte is the expected character.
136 * For pos 4 ---> 'e'
137 */
138 if (read_buf[0] != 'e') {
139 tst_resm(TFAIL, "Incorrect data read "
140 "from file %s", TEMP_FILE);
141 } else {
142 tst_resm(TPASS, "Functionality "
143 "of lseek() on %s "
144 "successful", TEMP_FILE);
145 }
146 }
147 }
148
149 cleanup();
150 tst_exit();
151 }
152
153 /*
154 * setup() - performs all ONE TIME setup for this test.
155 * Create a temporary directory and change directory to it.
156 * Create a test file under temporary directory and write some
157 * data into it.
158 */
setup(void)159 void setup(void)
160 {
161 char write_buf[BUFSIZ]; /* buffer to hold data */
162
163 tst_sig(NOFORK, DEF_HANDLER, cleanup);
164
165 TEST_PAUSE;
166
167 tst_tmpdir();
168
169 /* Get the data to be written to temporary file */
170 strcpy(write_buf, "abcdefg");
171
172 /* Creat/open a temporary file under above directory */
173 if ((fildes = open(TEMP_FILE, O_RDWR | O_CREAT, FILE_MODE)) == -1) {
174 tst_brkm(TBROK, cleanup,
175 "open(%s, O_RDWR|O_CREAT, %#o) Failed, errno=%d :%s",
176 TEMP_FILE, FILE_MODE, errno, strerror(errno));
177 }
178
179 /* Write data into temporary file */
180 if (write(fildes, write_buf, strlen(write_buf)) != strlen(write_buf)) {
181 tst_brkm(TBROK, cleanup, "write(2) on %s Failed, errno=%d : %s",
182 TEMP_FILE, errno, strerror(errno));
183 }
184 }
185
186 /*
187 * cleanup() - performs all ONE TIME cleanup for this test at
188 * completion or premature exit.
189 * Remove the test directory and testfile created in the setup.
190 */
cleanup(void)191 void cleanup(void)
192 {
193
194 /* Close the temporary file created */
195 if (close(fildes) < 0) {
196 tst_brkm(TFAIL, NULL, "close(%s) Failed, errno=%d : %s:",
197 TEMP_FILE, errno, strerror(errno));
198 }
199
200 tst_rmdir();
201
202 }
203