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 * NAME
22 *	writev05.c
23 *
24 * DESCRIPTION
25 *	These testcases are written to test writev() on sparse files. This
26 *	is same as writev02.c. But the initial write() with valid data is
27 *	done at the beginning of the file.
28 *
29 * USAGE:  <for command-line>
30 *      writev05 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
31 *      where,  -c n : Run n copies concurrently.
32 *              -e   : Turn on errno logging.
33 *              -i n : Execute test n times.
34 *              -I x : Execute test for x seconds.
35 *              -P x : Pause for x seconds between iterations.
36 *              -t   : Turn on syscall timing.
37 *
38 * History
39 *	07/2001 John George
40 *		-Ported
41 *      04/2002 wjhuie sigset cleanups
42 *
43 * Restrictions
44 *	NONE
45 */
46
47#include <sys/types.h>
48#include <signal.h>
49#include <sys/uio.h>
50#include <fcntl.h>
51#include <memory.h>
52#include <errno.h>
53#include "test.h"
54#include <sys/mman.h>
55
56#define	K_1	8192
57
58#define	NBUFS		2
59#define	CHUNK		K_1	/* single chunk */
60#define	MAX_IOVEC	2
61#define	DATA_FILE	"writev_data_file"
62
63char buf1[K_1];
64char buf2[K_1];
65char buf3[K_1];
66
67char *bad_addr = 0;
68
69struct iovec wr_iovec[MAX_IOVEC] = {
70	{(caddr_t) - 1, CHUNK},
71	{NULL, 0}
72};
73
74char name[K_1], f_name[K_1];
75int fd[2], in_sighandler;
76char *buf_list[NBUFS];
77
78char *TCID = "writev05";
79int TST_TOTAL = 1;
80
81void sighandler(int);
82long l_seek(int, long, int);
83void setup(void);
84void cleanup(void);
85
86#if !defined(UCLINUX)
87
88int main(int argc, char **argv)
89{
90	int lc;
91
92	int nbytes;
93
94	tst_parse_opts(argc, argv, NULL, NULL);
95
96	setup();		/* set "tstdir", and "testfile" vars */
97
98	/* The following loop checks looping state if -i option given */
99	for (lc = 0; TEST_LOOPING(lc); lc++) {
100
101		/* reset tst_count in case we are looping */
102		tst_count = 0;
103
104		buf_list[0] = buf1;
105		buf_list[1] = buf2;
106
107		fd[1] = -1;	/* Invalid file descriptor */
108
109		if (signal(SIGTERM, sighandler) == SIG_ERR) {
110			perror("signal");
111			tst_resm(TFAIL, "signal() SIGTERM FAILED");
112			cleanup();
113		}
114
115		if (signal(SIGPIPE, sighandler) == SIG_ERR) {
116			perror("signal");
117			tst_resm(TFAIL, "signal() SIGPIPE FAILED");
118			cleanup();
119		}
120
121		/* Fill the buf_list[0] and buf_list[1] with 0 zeros */
122		memset(buf_list[0], 0, K_1);
123		memset(buf_list[1], 0, K_1);
124
125		if ((fd[0] = open(f_name, O_WRONLY | O_CREAT, 0666)) < 0) {
126			tst_resm(TFAIL, "open(2) failed: fname = %s, "
127				 "errno = %d", f_name, errno);
128			cleanup();
129		} else {
130			if ((nbytes = write(fd[0], buf_list[1], K_1)) != K_1) {
131				tst_resm(TFAIL, "write(2) failed: nbytes "
132					 "= %d, errno = %d", nbytes, errno);
133				cleanup();
134			}
135		}
136
137		if (close(fd[0]) < 0) {
138			tst_resm(TFAIL, "close failed: errno = %d", errno);
139			cleanup();
140		}
141
142		if ((fd[0] = open(f_name, O_RDWR, 0666)) < 0) {
143			tst_resm(TFAIL, "open failed: fname = %s, errno = %d",
144				 f_name, errno);
145			cleanup();
146		}
147
148		/*
149		 * In this block we are trying to call writev() with invalid
150		 * vector to be written in a sparse file. This will return
151		 * EFAULT. At the same time, check should be made whether
152		 * the scheduled write() with valid data is done correctly
153		 * or not.
154		 */
155		l_seek(fd[0], 0, 0);
156		TEST(writev(fd[0], wr_iovec, 2));
157		if (TEST_RETURN < 0) {
158			if (TEST_ERRNO == EFAULT) {
159				tst_resm(TPASS, "Received EFAULT as expected");
160			} else {
161				tst_resm(TFAIL, "Expected EFAULT, got %d",
162					 TEST_ERRNO);
163			}
164			l_seek(fd[0], K_1, 0);
165			if ((nbytes = read(fd[0], buf_list[0], CHUNK)) != 0) {
166				tst_resm(TFAIL, "Expected nbytes = 0, got "
167					 "%d", nbytes);
168			}
169		} else {
170			tst_resm(TFAIL, "Error writev returned a positive "
171				 "value");
172		}
173	}
174	close(fd[0]);
175	close(fd[1]);
176	cleanup();
177	tst_exit();
178
179}
180
181#else
182
183int main(void)
184{
185	tst_resm(TINFO, "test is not available on uClinux");
186	tst_exit();
187}
188
189#endif /* if !defined(UCLINUX) */
190
191/*
192 * setup()
193 *	performs all ONE TIME setup for this test
194 */
195void setup(void)
196{
197
198	tst_sig(FORK, DEF_HANDLER, cleanup);
199
200	/* Pause if that option was specified.
201	 * TEST_PAUSE contains the code to fork the test with the -i option.
202	 * You want to make sure you do this before you create your temporary
203	 * directory.
204	 */
205	TEST_PAUSE;
206
207	/* Create a unique temporary directory and chdir() to it. */
208	tst_tmpdir();
209
210	strcpy(name, DATA_FILE);
211	sprintf(f_name, "%s.%d", name, getpid());
212
213	bad_addr = mmap(0, 1, PROT_NONE,
214			MAP_PRIVATE_EXCEPT_UCLINUX | MAP_ANONYMOUS, 0, 0);
215	if (bad_addr == MAP_FAILED) {
216		printf("mmap failed\n");
217	}
218	wr_iovec[0].iov_base = bad_addr;
219
220}
221
222/*
223 * cleanup()
224 *	performs all ONE TIME cleanup for this test at
225 *	completion or premature exit
226 */
227void cleanup(void)
228{
229
230	if (unlink(f_name) < 0) {
231		tst_resm(TFAIL, "unlink Failed--file = %s, errno = %d",
232			 f_name, errno);
233	}
234	tst_rmdir();
235
236}
237
238/*
239 * sighandler()
240 *	Signal handler for SIGTERM and SIGPIPE
241 */
242void sighandler(int sig)
243{
244	switch (sig) {
245	case SIGTERM:
246		break;
247	case SIGPIPE:
248		++in_sighandler;
249		return;
250	default:
251		tst_resm(TFAIL, "sighandler() received invalid signal "
252			 ": %d", sig);
253		break;
254	}
255
256	if ((unlink(f_name) < 0) && (errno != ENOENT)) {
257		tst_resm(TFAIL, "unlink Failed--file = %s, errno = %d",
258			 f_name, errno);
259		cleanup();
260	}
261	exit(sig);
262}
263
264/*
265 * l_seek()
266 *	Wrap around for regular lseek() to give error message on failure
267 */
268long l_seek(int fdesc, long offset, int whence)
269{
270	if (lseek(fdesc, offset, whence) < 0) {
271		tst_resm(TFAIL, "lseek Failed : errno = %d", errno);
272	}
273	return 0;
274}
275