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
28 #include <sys/types.h>
29 #include <sys/event.h>
30 #include <sys/filio.h>
31 #include <sys/ioctl.h>
32 #include <sys/stat.h>
33 #include <sys/time.h>
34
35 #include <err.h>
36 #include <errno.h>
37 #include <fcntl.h>
38 #include <limits.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43
44 /*
45 * Regression test for piddling details of fifos.
46 */
47
48 /*
49 * All activity occurs within a temporary directory created early in the
50 * test.
51 */
52 static char temp_dir[PATH_MAX];
53
54 static void __unused
atexit_temp_dir(void)55 atexit_temp_dir(void)
56 {
57
58 rmdir(temp_dir);
59 }
60
61 static void
makefifo(const char * fifoname,const char * testname)62 makefifo(const char *fifoname, const char *testname)
63 {
64
65 if (mkfifo(fifoname, 0700) < 0)
66 err(-1, "%s: makefifo: mkfifo: %s", testname, fifoname);
67 }
68
69 static void
cleanfifo(const char * fifoname,int fd1,int fd2)70 cleanfifo(const char *fifoname, int fd1, int fd2)
71 {
72
73 if (fd1 != -1)
74 close(fd1);
75 if (fd2 != -1)
76 close(fd2);
77 (void)unlink(fifoname);
78 }
79
80 static int
openfifo(const char * fifoname,int * reader_fdp,int * writer_fdp)81 openfifo(const char *fifoname, int *reader_fdp, int *writer_fdp)
82 {
83 int error, fd1, fd2;
84
85 fd1 = open(fifoname, O_RDONLY | O_NONBLOCK);
86 if (fd1 < 0)
87 return (-1);
88 fd2 = open(fifoname, O_WRONLY | O_NONBLOCK);
89 if (fd2 < 0) {
90 error = errno;
91 close(fd1);
92 errno = error;
93 return (-1);
94 }
95 *reader_fdp = fd1;
96 *writer_fdp = fd2;
97
98 return (0);
99 }
100
101 /*
102 * POSIX does not allow lseek(2) on fifos, so we expect ESPIPE as a result.
103 */
104 static void
test_lseek(void)105 test_lseek(void)
106 {
107 int reader_fd, writer_fd;
108
109 makefifo("testfifo", __func__);
110
111 if (openfifo("testfifo", &reader_fd, &writer_fd) < 0) {
112 warn("%s: openfifo", __func__);
113 cleanfifo("testfifo", -1, -1);
114 exit(-1);
115 }
116
117 if (lseek(reader_fd, 1, SEEK_CUR) >= 0) {
118 warnx("%s: lseek succeeded instead of returning ESPIPE",
119 __func__);
120 cleanfifo("testfifo", reader_fd, writer_fd);
121 exit(-1);
122 }
123 if (errno != ESPIPE) {
124 warn("%s: lseek returned instead of ESPIPE", __func__);
125 cleanfifo("testfifo", reader_fd, writer_fd);
126 exit(-1);
127 }
128
129 cleanfifo("testfifo", reader_fd, writer_fd);
130 }
131
132 /*
133 * truncate(2) on FIFO should silently return success.
134 */
135 static void
test_truncate(void)136 test_truncate(void)
137 {
138
139 makefifo("testfifo", __func__);
140
141 if (truncate("testfifo", 1024) != 0) {
142 warn("%s: truncate", __func__);
143 cleanfifo("testfifo", -1, -1);
144 exit(-1);
145 }
146
147 cleanfifo("testfifo", -1, -1);
148 }
149
150 static int
test_ioctl_setclearflag(int fd,unsigned long flag,const char * testname,const char * fdname,const char * flagname)151 test_ioctl_setclearflag(int fd, unsigned long flag, const char *testname,
152 const char *fdname, const char *flagname)
153 {
154 int i;
155
156 i = 1;
157 if (ioctl(fd, flag, &i) < 0) {
158 warn("%s:%s: ioctl(%s, %s, 1)", testname, __func__, fdname,
159 flagname);
160 cleanfifo("testfifo", -1, -1);
161 exit(-1);
162 }
163
164 i = 0;
165 if (ioctl(fd, flag, &i) < 0) {
166 warn("%s:%s: ioctl(%s, %s, 0)", testname, __func__, fdname,
167 flagname);
168 cleanfifo("testfifo", -1, -1);
169 exit(-1);
170 }
171
172 return (0);
173 }
174
175 /*
176 * Test that various ioctls can be issued against the file descriptor. We
177 * don't currently test the semantics of these changes here.
178 */
179 static void
test_ioctl(void)180 test_ioctl(void)
181 {
182 int reader_fd, writer_fd;
183
184 makefifo("testfifo", __func__);
185
186 if (openfifo("testfifo", &reader_fd, &writer_fd) < 0) {
187 warn("%s: openfifo", __func__);
188 cleanfifo("testfifo", -1, -1);
189 exit(-1);
190 }
191
192 /*
193 * Set and remove the non-blocking I/O flag.
194 */
195 if (test_ioctl_setclearflag(reader_fd, FIONBIO, __func__,
196 "reader_fd", "FIONBIO") < 0) {
197 cleanfifo("testfifo", reader_fd, writer_fd);
198 exit(-1);
199 }
200
201 if (test_ioctl_setclearflag(writer_fd, FIONBIO, __func__,
202 "writer_fd", "FIONBIO") < 0) {
203 cleanfifo("testfifo", reader_fd, writer_fd);
204 exit(-1);
205 }
206
207 /*
208 * Set and remove the async I/O flag.
209 */
210 if (test_ioctl_setclearflag(reader_fd, FIOASYNC, __func__,
211 "reader_fd", "FIOASYNC") < 0) {
212 cleanfifo("testfifo", reader_fd, writer_fd);
213 exit(-1);
214 }
215
216 if (test_ioctl_setclearflag(writer_fd, FIOASYNC, __func__,
217 "writer_fd", "FIONASYNC") < 0) {
218 cleanfifo("testfifo", reader_fd, writer_fd);
219 exit(-1);
220 }
221
222 cleanfifo("testfifo", reader_fd, writer_fd);
223 }
224
225 /*
226 * fchmod(2)/fchown(2) on FIFO should work.
227 */
228 static void
test_chmodchown(void)229 test_chmodchown(void)
230 {
231 struct stat sb;
232 int reader_fd, writer_fd;
233 uid_t u;
234 gid_t g;
235
236 makefifo("testfifo", __func__);
237
238 if (openfifo("testfifo", &reader_fd, &writer_fd) < 0) {
239 warn("%s: openfifo", __func__);
240 cleanfifo("testfifo", -1, -1);
241 exit(-1);
242 }
243
244 if (fchmod(reader_fd, 0666) != 0) {
245 warn("%s: fchmod", __func__);
246 cleanfifo("testfifo", reader_fd, writer_fd);
247 exit(-1);
248 }
249
250 if (stat("testfifo", &sb) != 0) {
251 warn("%s: stat", __func__);
252 cleanfifo("testfifo", reader_fd, writer_fd);
253 exit(-1);
254 }
255
256 if ((sb.st_mode & 0777) != 0666) {
257 warnx("%s: stat chmod result", __func__);
258 cleanfifo("testfifo", reader_fd, writer_fd);
259 exit(-1);
260 }
261
262 if (fstat(writer_fd, &sb) != 0) {
263 warn("%s: fstat", __func__);
264 cleanfifo("testfifo", reader_fd, writer_fd);
265 exit(-1);
266 }
267
268 if ((sb.st_mode & 0777) != 0666) {
269 warnx("%s: fstat chmod result", __func__);
270 cleanfifo("testfifo", reader_fd, writer_fd);
271 exit(-1);
272 }
273
274 if (fchown(reader_fd, -1, -1) != 0) {
275 warn("%s: fchown 1", __func__);
276 cleanfifo("testfifo", reader_fd, writer_fd);
277 exit(-1);
278 }
279
280 u = geteuid();
281 if (u == 0)
282 u = 1;
283 g = getegid();
284 if (fchown(reader_fd, u, g) != 0) {
285 warn("%s: fchown 2", __func__);
286 cleanfifo("testfifo", reader_fd, writer_fd);
287 exit(-1);
288 }
289 if (stat("testfifo", &sb) != 0) {
290 warn("%s: stat", __func__);
291 cleanfifo("testfifo", reader_fd, writer_fd);
292 exit(-1);
293 }
294
295 if (sb.st_uid != u || sb.st_gid != g) {
296 warnx("%s: stat chown result", __func__);
297 cleanfifo("testfifo", reader_fd, writer_fd);
298 exit(-1);
299 }
300
301 if (fstat(writer_fd, &sb) != 0) {
302 warn("%s: fstat", __func__);
303 cleanfifo("testfifo", reader_fd, writer_fd);
304 exit(-1);
305 }
306
307 if (sb.st_uid != u || sb.st_gid != g) {
308 warnx("%s: fstat chown result", __func__);
309 cleanfifo("testfifo", reader_fd, writer_fd);
310 exit(-1);
311 }
312
313 cleanfifo("testfifo", -1, -1);
314 }
315
316 int
main(void)317 main(void)
318 {
319
320 strcpy(temp_dir, "fifo_misc.XXXXXXXXXXX");
321 if (mkdtemp(temp_dir) == NULL)
322 err(-1, "mkdtemp");
323 atexit(atexit_temp_dir);
324
325 if (chdir(temp_dir) < 0)
326 err(-1, "chdir %s", temp_dir);
327
328 test_lseek();
329 test_truncate();
330 test_ioctl();
331 test_chmodchown();
332
333 return (0);
334 }
335