1 /*-
2 * Copyright (c) 2005 Robert N. M. Watson
3 * Copyright (c) 2012 Jilles Tjoelker
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD$
28 */
29
30 #include <sys/types.h>
31 #include <sys/event.h>
32 #include <sys/filio.h>
33 #include <sys/ioctl.h>
34 #include <sys/stat.h>
35 #include <sys/time.h>
36
37 #include <err.h>
38 #include <errno.h>
39 #include <fcntl.h>
40 #include <limits.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <unistd.h>
45
46 /*
47 * Regression test for piddling details of fifos.
48 */
49
50 /*
51 * All activity occurs within a temporary directory created early in the
52 * test.
53 */
54 static char temp_dir[PATH_MAX];
55
56 static void __unused
atexit_temp_dir(void)57 atexit_temp_dir(void)
58 {
59
60 rmdir(temp_dir);
61 }
62
63 static void
makefifo(const char * fifoname,const char * testname)64 makefifo(const char *fifoname, const char *testname)
65 {
66
67 if (mkfifo(fifoname, 0700) < 0)
68 err(-1, "%s: makefifo: mkfifo: %s", testname, fifoname);
69 }
70
71 static void
cleanfifo(const char * fifoname,int fd1,int fd2)72 cleanfifo(const char *fifoname, int fd1, int fd2)
73 {
74
75 if (fd1 != -1)
76 close(fd1);
77 if (fd2 != -1)
78 close(fd2);
79 (void)unlink(fifoname);
80 }
81
82 static int
openfifo(const char * fifoname,int * reader_fdp,int * writer_fdp)83 openfifo(const char *fifoname, int *reader_fdp, int *writer_fdp)
84 {
85 int error, fd1, fd2;
86
87 fd1 = open(fifoname, O_RDONLY | O_NONBLOCK);
88 if (fd1 < 0)
89 return (-1);
90 fd2 = open(fifoname, O_WRONLY | O_NONBLOCK);
91 if (fd2 < 0) {
92 error = errno;
93 close(fd1);
94 errno = error;
95 return (-1);
96 }
97 *reader_fdp = fd1;
98 *writer_fdp = fd2;
99
100 return (0);
101 }
102
103 /*
104 * POSIX does not allow lseek(2) on fifos, so we expect ESPIPE as a result.
105 */
106 static void
test_lseek(void)107 test_lseek(void)
108 {
109 int reader_fd, writer_fd;
110
111 makefifo("testfifo", __func__);
112
113 if (openfifo("testfifo", &reader_fd, &writer_fd) < 0) {
114 warn("%s: openfifo", __func__);
115 cleanfifo("testfifo", -1, -1);
116 exit(-1);
117 }
118
119 if (lseek(reader_fd, 1, SEEK_CUR) >= 0) {
120 warnx("%s: lseek succeeded instead of returning ESPIPE",
121 __func__);
122 cleanfifo("testfifo", reader_fd, writer_fd);
123 exit(-1);
124 }
125 if (errno != ESPIPE) {
126 warn("%s: lseek returned instead of ESPIPE", __func__);
127 cleanfifo("testfifo", reader_fd, writer_fd);
128 exit(-1);
129 }
130
131 cleanfifo("testfifo", reader_fd, writer_fd);
132 }
133
134 /*
135 * truncate(2) on FIFO should silently return success.
136 */
137 static void
test_truncate(void)138 test_truncate(void)
139 {
140
141 makefifo("testfifo", __func__);
142
143 if (truncate("testfifo", 1024) != 0) {
144 warn("%s: truncate", __func__);
145 cleanfifo("testfifo", -1, -1);
146 exit(-1);
147 }
148
149 cleanfifo("testfifo", -1, -1);
150 }
151
152 static int
test_ioctl_setclearflag(int fd,unsigned long flag,const char * testname,const char * fdname,const char * flagname)153 test_ioctl_setclearflag(int fd, unsigned long flag, const char *testname,
154 const char *fdname, const char *flagname)
155 {
156 int i;
157
158 i = 1;
159 if (ioctl(fd, flag, &i) < 0) {
160 warn("%s:%s: ioctl(%s, %s, 1)", testname, __func__, fdname,
161 flagname);
162 cleanfifo("testfifo", -1, -1);
163 exit(-1);
164 }
165
166 i = 0;
167 if (ioctl(fd, flag, &i) < 0) {
168 warn("%s:%s: ioctl(%s, %s, 0)", testname, __func__, fdname,
169 flagname);
170 cleanfifo("testfifo", -1, -1);
171 exit(-1);
172 }
173
174 return (0);
175 }
176
177 /*
178 * Test that various ioctls can be issued against the file descriptor. We
179 * don't currently test the semantics of these changes here.
180 */
181 static void
test_ioctl(void)182 test_ioctl(void)
183 {
184 int reader_fd, writer_fd;
185
186 makefifo("testfifo", __func__);
187
188 if (openfifo("testfifo", &reader_fd, &writer_fd) < 0) {
189 warn("%s: openfifo", __func__);
190 cleanfifo("testfifo", -1, -1);
191 exit(-1);
192 }
193
194 /*
195 * Set and remove the non-blocking I/O flag.
196 */
197 if (test_ioctl_setclearflag(reader_fd, FIONBIO, __func__,
198 "reader_fd", "FIONBIO") < 0) {
199 cleanfifo("testfifo", reader_fd, writer_fd);
200 exit(-1);
201 }
202
203 if (test_ioctl_setclearflag(writer_fd, FIONBIO, __func__,
204 "writer_fd", "FIONBIO") < 0) {
205 cleanfifo("testfifo", reader_fd, writer_fd);
206 exit(-1);
207 }
208
209 /*
210 * Set and remove the async I/O flag.
211 */
212 if (test_ioctl_setclearflag(reader_fd, FIOASYNC, __func__,
213 "reader_fd", "FIOASYNC") < 0) {
214 cleanfifo("testfifo", reader_fd, writer_fd);
215 exit(-1);
216 }
217
218 if (test_ioctl_setclearflag(writer_fd, FIOASYNC, __func__,
219 "writer_fd", "FIONASYNC") < 0) {
220 cleanfifo("testfifo", reader_fd, writer_fd);
221 exit(-1);
222 }
223
224 cleanfifo("testfifo", reader_fd, writer_fd);
225 }
226
227 /*
228 * fchmod(2)/fchown(2) on FIFO should work.
229 */
230 static void
test_chmodchown(void)231 test_chmodchown(void)
232 {
233 struct stat sb;
234 int reader_fd, writer_fd;
235 uid_t u;
236 gid_t g;
237
238 makefifo("testfifo", __func__);
239
240 if (openfifo("testfifo", &reader_fd, &writer_fd) < 0) {
241 warn("%s: openfifo", __func__);
242 cleanfifo("testfifo", -1, -1);
243 exit(-1);
244 }
245
246 if (fchmod(reader_fd, 0666) != 0) {
247 warn("%s: fchmod", __func__);
248 cleanfifo("testfifo", reader_fd, writer_fd);
249 exit(-1);
250 }
251
252 if (stat("testfifo", &sb) != 0) {
253 warn("%s: stat", __func__);
254 cleanfifo("testfifo", reader_fd, writer_fd);
255 exit(-1);
256 }
257
258 if ((sb.st_mode & 0777) != 0666) {
259 warnx("%s: stat chmod result", __func__);
260 cleanfifo("testfifo", reader_fd, writer_fd);
261 exit(-1);
262 }
263
264 if (fstat(writer_fd, &sb) != 0) {
265 warn("%s: fstat", __func__);
266 cleanfifo("testfifo", reader_fd, writer_fd);
267 exit(-1);
268 }
269
270 if ((sb.st_mode & 0777) != 0666) {
271 warnx("%s: fstat chmod result", __func__);
272 cleanfifo("testfifo", reader_fd, writer_fd);
273 exit(-1);
274 }
275
276 if (fchown(reader_fd, -1, -1) != 0) {
277 warn("%s: fchown 1", __func__);
278 cleanfifo("testfifo", reader_fd, writer_fd);
279 exit(-1);
280 }
281
282 u = geteuid();
283 if (u == 0)
284 u = 1;
285 g = getegid();
286 if (fchown(reader_fd, u, g) != 0) {
287 warn("%s: fchown 2", __func__);
288 cleanfifo("testfifo", reader_fd, writer_fd);
289 exit(-1);
290 }
291 if (stat("testfifo", &sb) != 0) {
292 warn("%s: stat", __func__);
293 cleanfifo("testfifo", reader_fd, writer_fd);
294 exit(-1);
295 }
296
297 if (sb.st_uid != u || sb.st_gid != g) {
298 warnx("%s: stat chown result", __func__);
299 cleanfifo("testfifo", reader_fd, writer_fd);
300 exit(-1);
301 }
302
303 if (fstat(writer_fd, &sb) != 0) {
304 warn("%s: fstat", __func__);
305 cleanfifo("testfifo", reader_fd, writer_fd);
306 exit(-1);
307 }
308
309 if (sb.st_uid != u || sb.st_gid != g) {
310 warnx("%s: fstat chown result", __func__);
311 cleanfifo("testfifo", reader_fd, writer_fd);
312 exit(-1);
313 }
314
315 cleanfifo("testfifo", -1, -1);
316 }
317
318 int
main(void)319 main(void)
320 {
321
322 strcpy(temp_dir, "fifo_misc.XXXXXXXXXXX");
323 if (mkdtemp(temp_dir) == NULL)
324 err(-1, "mkdtemp");
325 atexit(atexit_temp_dir);
326
327 if (chdir(temp_dir) < 0)
328 err(-1, "chdir %s", temp_dir);
329
330 test_lseek();
331 test_truncate();
332 test_ioctl();
333 test_chmodchown();
334
335 return (0);
336 }
337