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: pwrite01
22 *
23 * Test Description:
24 * Verify the functionality of pwrite() by writing known data using pwrite()
25 * to the file at various specified offsets and later read from the file from
26 * various specified offsets, comparing the data written aganist the data
27 * read using read().
28 *
29 * Expected Result:
30 * pwrite() should succeed to write the expected no. of bytes of data and
31 * the data written at specified offsets should match aganist the data read
32 * from that offset.
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 * pwrite01 [-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 #define _XOPEN_SOURCE 500
72
73 #include <errno.h>
74 #include <unistd.h>
75 #include <fcntl.h>
76 #include <stdlib.h>
77 #include <string.h>
78 #include <inttypes.h>
79
80 #include "test.h"
81
82 #define _XOPEN_SOURCE 500
83 #define TEMPFILE "pwrite_file"
84 #define K1 1024
85 #define K2 (K1 * 2)
86 #define K3 (K1 * 3)
87 #define K4 (K1 * 4)
88 #define NBUFS 4
89
90 char *TCID = "pwrite01";
91 int TST_TOTAL = 1;
92 int fildes; /* file descriptor for tempfile */
93 char *write_buf[NBUFS]; /* buffer to hold data to be written */
94
95 void setup(); /* Main setup function of test */
96 void cleanup(); /* cleanup function for the test */
97 void l_seek(int, off_t, int, off_t); /* function to call lseek() */
98 void init_buffers(); /* function to initialize/allocate buffers */
99 void check_file_contents(); /* function to verify the contents of file */
100
main(int ac,char ** av)101 int main(int ac, char **av)
102 {
103 int lc;
104 int nwrite; /* no. of bytes written by pwrite() */
105
106 tst_parse_opts(ac, av, NULL, NULL);
107
108 setup();
109
110 for (lc = 0; TEST_LOOPING(lc); lc++) {
111
112 tst_count = 0;
113
114 /*
115 * Call pwrite() to write K1 bytes of data (0's) at offset 0
116 * of temporary file
117 */
118 nwrite = pwrite(fildes, write_buf[0], K1, 0);
119
120 /* Check for the return value of pwrite() */
121 if (nwrite != K1) {
122 tst_resm(TFAIL, "pwrite() at offset 0 failed, errno=%d "
123 ": %s", errno, strerror(errno));
124 continue;
125 }
126
127 /* We should still be at offset 0. */
128 l_seek(fildes, 0, SEEK_CUR, 0);
129
130 /*
131 * Now, lseek() to a non K boundary,
132 * just to be different.
133 */
134 l_seek(fildes, K1 / 2, SEEK_SET, K1 / 2);
135
136 /*
137 * Again, pwrite() K1 of data (2's) at offset K2 of
138 * temporary file.
139 */
140 nwrite = pwrite(fildes, write_buf[2], K1, K2);
141 if (nwrite != K1) {
142 tst_resm(TFAIL, "pwrite() failed to "
143 "write at %d off. on %s, errno=%d : %s",
144 K2, TEMPFILE, errno, strerror(errno));
145 continue;
146 }
147
148 /* We should still be at our non K boundary. */
149 l_seek(fildes, 0, SEEK_CUR, K1 / 2);
150
151 /* lseek() to an offset of K3. */
152 l_seek(fildes, K3, SEEK_SET, K3);
153
154 /*
155 * Using write(), write of K1 of data (3's) which
156 * should take place at an offset of K3,
157 * moving the file pointer to K4.
158 */
159 nwrite = write(fildes, write_buf[3], K1);
160 if (nwrite != K1) {
161 tst_resm(TFAIL, "write() failed: nwrite=%d, errno=%d : "
162 "%s", nwrite, errno, strerror(errno));
163 continue;
164 }
165
166 /* We should be at offset K4. */
167 l_seek(fildes, 0, SEEK_CUR, K4);
168
169 /* Again, pwrite() K1 of data (1's) at offset K1. */
170 nwrite = pwrite(fildes, write_buf[1], K1, K1);
171 if (nwrite != K1) {
172 tst_resm(TFAIL, "pwrite() failed to write at "
173 "%d off. on %s, errno=%d : %s",
174 K1, TEMPFILE, errno, strerror(errno));
175 continue;
176 }
177
178 /*
179 * Check the contents of temporary file
180 * to which data written using pwrite().
181 * Compare the data read with the original
182 * write_buf[] contents.
183 */
184 check_file_contents();
185
186 /* reset to offset 0 in case we are looping */
187 l_seek(fildes, 0, SEEK_SET, 0);
188
189 }
190
191 cleanup();
192 tst_exit();
193 }
194
195 /*
196 * setup() - performs all ONE TIME setup for this test.
197 *
198 * Initialize/allocate read/write buffers.
199 * Create a temporary directory and a file under it and
200 */
setup(void)201 void setup(void)
202 {
203
204 tst_sig(NOFORK, DEF_HANDLER, cleanup);
205
206 TEST_PAUSE;
207
208 /* Allocate/Initialize the write buffer with known data */
209 init_buffers();
210
211 tst_tmpdir();
212
213 /* Creat a temporary file used for mapping */
214 if ((fildes = open(TEMPFILE, O_RDWR | O_CREAT, 0666)) < 0) {
215 tst_brkm(TBROK, cleanup, "open() on %s Failed, errno=%d : %s",
216 TEMPFILE, errno, strerror(errno));
217 }
218 }
219
220 /*
221 * init_buffers() - allocate/Initialize write_buf array.
222 *
223 * Allocate write buffer.
224 * Fill the write buffer with the following data like,
225 * write_buf[0] has 0's, write_buf[1] has 1's, write_buf[2] has 2's
226 * write_buf[3] has 3's.
227 */
init_buffers(void)228 void init_buffers(void)
229 {
230 int count; /* counter variable for loop */
231
232 /* Allocate and Initialize write buffer with known data */
233 for (count = 0; count < NBUFS; count++) {
234 write_buf[count] = malloc(K1);
235
236 if (write_buf[count] == NULL) {
237 tst_brkm(TBROK, NULL, "malloc() failed ");
238 }
239 memset(write_buf[count], count, K1);
240 }
241 }
242
243 /*
244 * l_seek() - local front end to lseek().
245 *
246 * "checkoff" is the offset at which we believe we should be at.
247 * Used to validate pread/pwrite don't move the offset.
248 */
l_seek(int fdesc,off_t offset,int whence,off_t checkoff)249 void l_seek(int fdesc, off_t offset, int whence, off_t checkoff)
250 {
251 off_t offloc; /* offset ret. from lseek() */
252
253 if ((offloc = lseek(fdesc, offset, whence)) != checkoff) {
254 tst_resm(TWARN, "lseek returned %" PRId64 ", expected %" PRId64,
255 (int64_t) offloc, (int64_t) checkoff);
256 tst_brkm(TBROK | TERRNO, cleanup, "lseek() on %s Failed",
257 TEMPFILE);
258 }
259 }
260
261 /*
262 * check_file_contents() - Check the contents of the file we wrote with
263 * pwrite()'s.
264 * The contents of the file are verified by using a plain read() and
265 * Compare the data read with the original write_buf[] contents.
266 */
check_file_contents(void)267 void check_file_contents(void)
268 {
269 int count, err_flg = 0; /* index variable and error flag */
270 int nread; /* return value of read() */
271 off_t offloc; /* offset. ret. by lseek() */
272 char *read_buf; /* buffer to hold read data */
273
274 /* Allocate space for read buffer */
275 read_buf = malloc(K1);
276 if (read_buf == NULL) {
277 tst_brkm(TBROK, cleanup, "malloc() failed on read buffer");
278 }
279
280 /* Seek to app. location of file and read the data, compare it */
281 for (count = 0; count < NBUFS; count++) {
282 /* Seek to specified offset position from beginning */
283 offloc = lseek(fildes, count * K1, SEEK_SET);
284 if (offloc != (count * K1)) {
285 tst_brkm(TBROK | TERRNO, cleanup,
286 "lseek() failed: offloc=%" PRId64,
287 (int64_t) offloc);
288 }
289
290 /* Read the data from file into a buffer */
291 nread = read(fildes, read_buf, K1);
292 if (nread != K1) {
293 tst_brkm(TBROK | TERRNO, cleanup,
294 "read() failed: nread=%d", nread);
295 }
296
297 /* Compare the read data with the data written using pwrite */
298 if (memcmp(write_buf[count], read_buf, K1) != 0) {
299 tst_resm(TFAIL, "read/write buffer data mismatch");
300 err_flg++;
301 }
302 }
303
304 /* If no erros, Test successful */
305 if (!err_flg) {
306 tst_resm(TPASS, "Functionality of pwrite() successful");
307 }
308
309 /* Release the memory allocated before return */
310 free(read_buf);
311 }
312
313 /*
314 * cleanup() - performs all ONE TIME cleanup for this test at
315 * completion or premature exit.
316 *
317 * Deallocate the memory allocated to write buffer.
318 * Close the temporary file.
319 * Remove the temporary directory created.
320 */
cleanup(void)321 void cleanup(void)
322 {
323 int count;
324
325 /* Free the memory allocated for the write buffer */
326 for (count = 0; count < NBUFS; count++) {
327 free(write_buf[count]);
328 }
329
330 /* Close the temporary file */
331 if (close(fildes) < 0) {
332 tst_brkm(TBROK, NULL, "close() on %s Failed, errno=%d : %s",
333 TEMPFILE, errno, strerror(errno));
334 }
335
336 tst_rmdir();
337
338 }
339