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: lseek09
22 *
23 * Test Description:
24 * Verify that, lseek() call succeeds to set the file pointer position
25 * to the current specified location, when 'whence' value is set to
26 * SEEK_CUR and the data read from the specified location should match
27 * the expected data.
28 *
29 * Expected Result:
30 * lseek() should return the specified offset from the beginning of the file
31 * measured in bytes. The data read from this location should match the
32 * expected data.
33 *$
34 * Algorithm:
35 * Setup:
36 * Setup signal handling.
37 * Create temporary directory.
38 * Pause for SIGUSR1 if option specified.
39 *
40 * Test:
41 * Loop if the proper options are given.
42 * Execute system call
43 * Check return code, if system call failed (return=-1)
44 * Log the errno and Issue a FAIL message.
45 * Otherwise,
46 * Verify the Functionality of system call
47 * if successful,
48 * Issue Functionality-Pass message.
49 * Otherwise,
50 * Issue Functionality-Fail message.
51 * Cleanup:
52 * Print errno log and/or timing stats if options given
53 * Delete the temporary directory created.
54 *
55 * Usage: <for command-line>
56 * lseek09 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
57 * where, -c n : Run n copies concurrently.
58 * -f : Turn off functionality Testing.
59 * -i n : Execute test n times.
60 * -I x : Execute test for x seconds.
61 * -P x : Pause for x seconds between iterations.
62 * -t : Turn on syscall timing.
63 *
64 * HISTORY
65 * 07/2001 Ported by Wayne Boyer
66 *
67 * RESTRICTIONS:
68 * None.
69 */
70
71 #include <stdio.h>
72 #include <unistd.h>
73 #include <sys/types.h>
74 #include <errno.h>
75 #include <fcntl.h>
76 #include <utime.h>
77 #include <string.h>
78 #include <sys/stat.h>
79 #include <signal.h>
80
81 #include "test.h"
82
83 #define TEMP_FILE "tmp_file"
84 #define FILE_MODE S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
85
86 char *TCID = "lseek09";
87 int TST_TOTAL = 1;
88 int fildes; /* file handle for temp file */
89 size_t file_size; /* total size of file after data write */
90
91 void setup(); /* Main setup function of test */
92 void cleanup(); /* cleanup function for the test */
93
main(int ac,char ** av)94 int main(int ac, char **av)
95 {
96 int lc;
97 char read_buf[BUFSIZ]; /* data read from temp. file */
98
99 tst_parse_opts(ac, av, NULL, NULL);
100
101 setup();
102
103 for (lc = 0; TEST_LOOPING(lc); lc++) {
104
105 tst_count = 0;
106
107 /*
108 * Invoke lseek(2) to set the file
109 * pointer/handle from the current location
110 * of the file descriptor + specified offset.
111 */
112 TEST(lseek(fildes, 1, SEEK_CUR));
113
114 if (TEST_RETURN == (off_t) - 1) {
115 tst_resm(TFAIL, "lseek on (%s) Failed, errno=%d : %s",
116 TEMP_FILE, TEST_ERRNO, strerror(TEST_ERRNO));
117 continue;
118 }
119 /*
120 * Check if the return value from lseek(2) is equal
121 * to the 3 positions from the beginning of the file.
122 * ie, 2 positions from lseek() in the setup +
123 * 1 position from above above.
124 */
125 if (TEST_RETURN != 3) {
126 tst_resm(TFAIL, "lseek() returned incorrect "
127 "value %ld, expected 4", TEST_RETURN);
128 continue;
129 }
130 /*
131 * Read the data byte from this location.
132 */
133 memset(read_buf, 0, sizeof(read_buf));
134 if (read(fildes, &read_buf, (file_size - 3)) < 0) {
135 tst_brkm(TFAIL, cleanup,
136 "read() failed on %s, error=%d",
137 TEMP_FILE, errno);
138 } else {
139 /*
140 * Check if read data contains
141 * expected characters
142 * From pos 4 ---> 'defg'.
143 */
144 if (strcmp(read_buf, "defg")) {
145 tst_resm(TFAIL, "Incorrect data read "
146 "from file %s", TEMP_FILE);
147 } else {
148 tst_resm(TPASS, "Functionality of "
149 "lseek() on %s successful",
150 TEMP_FILE);
151 }
152 }
153
154 /* reset file pointer in case we are looping */
155 if (lseek(fildes, 2, SEEK_SET) == -1) {
156 tst_brkm(TBROK, cleanup, "lseek failed - could not "
157 "reset file pointer");
158 }
159 }
160
161 cleanup();
162 tst_exit();
163 }
164
165 /*
166 * setup() - performs all ONE TIME setup for this test.
167 * Create a temporary directory and change directory to it.
168 * Create a test file under temporary directory and write some
169 * data into it.
170 * Get the size of the file using fstat().
171 */
setup(void)172 void setup(void)
173 {
174 struct stat stat_buf; /* buffer to hold stat info. */
175 char write_buf[BUFSIZ]; /* buffer to hold data */
176
177 tst_sig(NOFORK, DEF_HANDLER, cleanup);
178
179 TEST_PAUSE;
180
181 tst_tmpdir();
182
183 /* Get the data to be written to temporary file */
184 strcpy(write_buf, "abcdefg");
185
186 /* Creat/open a temporary file under above directory */
187 if ((fildes = open(TEMP_FILE, O_RDWR | O_CREAT, FILE_MODE)) == -1) {
188 tst_brkm(TBROK, cleanup,
189 "open(%s, O_RDWR|O_CREAT, %#o) Failed, errno=%d :%s",
190 TEMP_FILE, FILE_MODE, errno, strerror(errno));
191 }
192
193 /* Write data into temporary file */
194 if (write(fildes, write_buf, strlen(write_buf)) <= 0) {
195 tst_brkm(TBROK, cleanup, "write(2) on %s Failed, errno=%d : %s",
196 TEMP_FILE, errno, strerror(errno));
197 }
198
199 /* Get the temporary file information */
200 if (fstat(fildes, &stat_buf) < 0) {
201 tst_brkm(TBROK, cleanup, "fstat(2) on %s Failed, errno=%d : %s",
202 TEMP_FILE, errno, strerror(errno));
203 }
204
205 file_size = stat_buf.st_size;
206
207 /*
208 * Reset the file pointer position to the specified offset
209 * from the beginning of the file.
210 */
211 if (lseek(fildes, 2, SEEK_SET) != 2) {
212 tst_brkm(TBROK, cleanup,
213 "lseek() fails to set file ptr. to specified offset");
214 }
215 }
216
217 /*
218 * cleanup() - performs all ONE TIME cleanup for this test at
219 * completion or premature exit.
220 * Remove the test directory and testfile created in the setup.
221 */
cleanup(void)222 void cleanup(void)
223 {
224
225 /* Close the temporary file created */
226 if (close(fildes) < 0) {
227 tst_brkm(TFAIL, NULL, "close(%s) Failed, errno=%d : %s:",
228 TEMP_FILE, errno, strerror(errno));
229 }
230
231 tst_rmdir();
232
233 }
234