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: lseek07
22 *
23 * Test Description:
24 * Verify that, lseek() call succeeds to set the file pointer position
25 * to more than the file size, when a file is opened for reading/writing.
26 *
27 * Expected Result:
28 * lseek() should return n+1, where n is the size of the file.
29 * Also when some data is written into this file it should start
30 * from that offset.
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 * lseek07 [-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 #include <inttypes.h>
79
80 #include "test.h"
81
82 #define TEMP_FILE "tmp_file"
83 #define FILE_MODE S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
84
85 char *TCID = "lseek07";
86 int TST_TOTAL = 1;
87 int fildes; /* file handle for temp file */
88 size_t file_size; /* size of temporary file */
89 char write_buf1[BUFSIZ]; /* buffer to hold data */
90 char write_buf2[BUFSIZ]; /* buffer to hold data */
91
92 void setup(); /* Main setup function of test */
93 void cleanup(); /* cleanup function for the test */
94
main(int ac,char ** av)95 int main(int ac, char **av)
96 {
97 int lc;
98 char read_buf[BUFSIZ]; /* data read from temp. file */
99 off_t offset; /* byte position in temporary file */
100
101 tst_parse_opts(ac, av, NULL, NULL);
102
103 setup();
104
105 for (lc = 0; TEST_LOOPING(lc); lc++) {
106
107 tst_count = 0;
108
109 /* Set the offset position */
110 offset = file_size + (lc * strlen(write_buf2));
111
112 /*
113 * Invoke lseek(2) to move the write file
114 * pointer/handle by the specified offset value.
115 */
116 TEST(lseek(fildes, offset, SEEK_SET));
117
118 if (TEST_RETURN == (off_t) - 1) {
119 tst_resm(TFAIL | TTERRNO, "lseek on (%s) failed",
120 TEMP_FILE);
121 continue;
122 }
123 /*
124 * Check if the return value from lseek(2)
125 * is equal to the specified offset value.
126 */
127 if (TEST_RETURN != offset) {
128 tst_resm(TFAIL, "lseek() returned "
129 "incorrect value %ld, expected "
130 "%" PRId64, TEST_RETURN,
131 (int64_t) offset);
132 continue;
133 }
134 /*
135 * The return value is okay, now write some data at
136 * the current offset position.
137 */
138 if (write(fildes, write_buf2, strlen(write_buf2)) !=
139 strlen(write_buf2)) {
140 tst_brkm(TFAIL | TERRNO, cleanup,
141 "write() failed to write additional data");
142 }
143
144 /*
145 * Now close the file and open it again
146 * and read all of the data.
147 */
148 if (close(fildes) < 0) {
149 tst_brkm(TFAIL, cleanup, "close() on %s Failed,"
150 " errno = %d", TEMP_FILE, errno);
151 }
152
153 /* Open the file again in read/write mode */
154 if ((fildes = open(TEMP_FILE, O_RDWR)) < 0) {
155 tst_brkm(TFAIL, cleanup, "Could not open the "
156 "%s readonly, error = %d",
157 TEMP_FILE, errno);
158 }
159
160 /*
161 * Now read all of the data. The size should be the
162 * offset + strlen(write_buf2).
163 */
164 if (read(fildes, &read_buf, (offset +
165 strlen(write_buf2))) < 0) {
166 tst_brkm(TFAIL, cleanup, "read() failed on %s, "
167 "error=%d", TEMP_FILE, errno);
168 } else {
169 /*
170 * Check data read is the complete data and not
171 * the only portion written.
172 */
173 if ((strncmp(read_buf, write_buf1,
174 strlen(write_buf1))) != 0) {
175 tst_brkm(TFAIL, cleanup,
176 "Incorrect data read #1 from "
177 "file %s", TEMP_FILE);
178 }
179 if ((strncmp(&read_buf[offset], write_buf2,
180 strlen(write_buf2))) != 0) {
181 tst_brkm(TFAIL, cleanup,
182 "Incorrect data read #2 from "
183 "file %s", TEMP_FILE);
184 }
185 tst_resm(TPASS, "Functionality of "
186 "lseek() on %s successful", TEMP_FILE);
187 }
188 }
189
190 cleanup();
191 tst_exit();
192 }
193
194 /*
195 * setup() - performs all ONE TIME setup for this test.
196 * Create a temporary directory and change directory to it.
197 * Create a test file under temporary directory and write some
198 * data into it.
199 * Get the size of the file using fstat().
200 */
setup(void)201 void setup(void)
202 {
203 struct stat stat_buf; /* struct buffer for stat(2) */
204
205 tst_sig(NOFORK, DEF_HANDLER, cleanup);
206
207 TEST_PAUSE;
208
209 tst_tmpdir();
210
211 /* Get the data to be written to temporary file */
212 strcpy(write_buf1, "abcdefg");
213 strcpy(write_buf2, "ijk");
214
215 /* Creat/open a temporary file for writing under above directory */
216 if ((fildes = open(TEMP_FILE, O_WRONLY | O_CREAT, FILE_MODE)) == -1) {
217 tst_brkm(TBROK, cleanup,
218 "open(%s, O_WRONLY|O_CREAT, %#o) Failed, errno=%d :%s",
219 TEMP_FILE, FILE_MODE, errno, strerror(errno));
220 }
221
222 /* Write data into temporary file */
223 if (write(fildes, write_buf1, strlen(write_buf1)) != strlen(write_buf1)) {
224 tst_brkm(TBROK, cleanup, "write(2) on %s Failed, errno=%d : %s",
225 TEMP_FILE, errno, strerror(errno));
226 }
227
228 /* Get the size of the temporary file after writing data */
229 if (fstat(fildes, &stat_buf) < 0) {
230 tst_brkm(TBROK, cleanup, "fstat() on %s Failed, errno=%d : %s",
231 TEMP_FILE, errno, strerror(errno));
232 }
233
234 file_size = stat_buf.st_size;
235 }
236
237 /*
238 * cleanup() - performs all ONE TIME cleanup for this test at
239 * completion or premature exit.
240 * Remove the test directory and testfile created in the setup.
241 */
cleanup(void)242 void cleanup(void)
243 {
244
245 /* Close the temporary file created */
246 if (close(fildes) < 0) {
247 tst_brkm(TFAIL, NULL, "close(%s) Failed, errno=%d : %s:",
248 TEMP_FILE, errno, strerror(errno));
249 }
250
251 tst_rmdir();
252
253 }
254