/src/httpd/srclib/apr/file_io/unix/pipe.c
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1 | | /* Licensed to the Apache Software Foundation (ASF) under one or more |
2 | | * contributor license agreements. See the NOTICE file distributed with |
3 | | * this work for additional information regarding copyright ownership. |
4 | | * The ASF licenses this file to You under the Apache License, Version 2.0 |
5 | | * (the "License"); you may not use this file except in compliance with |
6 | | * the License. You may obtain a copy of the License at |
7 | | * |
8 | | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | | * |
10 | | * Unless required by applicable law or agreed to in writing, software |
11 | | * distributed under the License is distributed on an "AS IS" BASIS, |
12 | | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
13 | | * See the License for the specific language governing permissions and |
14 | | * limitations under the License. |
15 | | */ |
16 | | |
17 | | #include "apr_arch_file_io.h" |
18 | | #include "apr_strings.h" |
19 | | #include "apr_portable.h" |
20 | | |
21 | | #include "apr_arch_inherit.h" |
22 | | |
23 | | /* Figure out how to get pipe block/nonblock on BeOS... |
24 | | * Basically, BONE7 changed things again so that ioctl didn't work, |
25 | | * but now fcntl does, hence we need to do this extra checking. |
26 | | * The joys of beta programs. :-) |
27 | | */ |
28 | | #if defined(BEOS) |
29 | | #if !defined(BONE7) |
30 | | # define BEOS_BLOCKING 1 |
31 | | #else |
32 | | # define BEOS_BLOCKING 0 |
33 | | #endif |
34 | | #endif |
35 | | |
36 | | static apr_status_t pipeblock(apr_file_t *thepipe) |
37 | 0 | { |
38 | 0 | #if !defined(BEOS) || !BEOS_BLOCKING |
39 | 0 | int fd_flags; |
40 | |
|
41 | 0 | fd_flags = fcntl(thepipe->filedes, F_GETFL, 0); |
42 | 0 | # if defined(O_NONBLOCK) |
43 | 0 | fd_flags &= ~O_NONBLOCK; |
44 | | # elif defined(O_NDELAY) |
45 | | fd_flags &= ~O_NDELAY; |
46 | | # elif defined(O_FNDELAY) |
47 | | fd_flags &= ~O_FNDELAY; |
48 | | # else |
49 | | /* XXXX: this breaks things, but an alternative isn't obvious...*/ |
50 | | return APR_ENOTIMPL; |
51 | | # endif |
52 | 0 | if (fcntl(thepipe->filedes, F_SETFL, fd_flags) == -1) { |
53 | 0 | return errno; |
54 | 0 | } |
55 | | #else /* BEOS_BLOCKING */ |
56 | | |
57 | | # if BEOS_BONE /* This only works on BONE 0-6 */ |
58 | | int on = 0; |
59 | | if (ioctl(thepipe->filedes, FIONBIO, &on, sizeof(on)) < 0) { |
60 | | return errno; |
61 | | } |
62 | | # else /* "classic" BeOS doesn't support this at all */ |
63 | | return APR_ENOTIMPL; |
64 | | # endif |
65 | | |
66 | | #endif /* !BEOS_BLOCKING */ |
67 | | |
68 | 0 | thepipe->blocking = BLK_ON; |
69 | 0 | return APR_SUCCESS; |
70 | 0 | } |
71 | | |
72 | | static apr_status_t pipenonblock(apr_file_t *thepipe) |
73 | 0 | { |
74 | 0 | #if !defined(BEOS) || !BEOS_BLOCKING |
75 | 0 | int fd_flags = fcntl(thepipe->filedes, F_GETFL, 0); |
76 | |
|
77 | 0 | # if defined(O_NONBLOCK) |
78 | 0 | fd_flags |= O_NONBLOCK; |
79 | | # elif defined(O_NDELAY) |
80 | | fd_flags |= O_NDELAY; |
81 | | # elif defined(O_FNDELAY) |
82 | | fd_flags |= O_FNDELAY; |
83 | | # else |
84 | | /* XXXX: this breaks things, but an alternative isn't obvious...*/ |
85 | | return APR_ENOTIMPL; |
86 | | # endif |
87 | 0 | if (fcntl(thepipe->filedes, F_SETFL, fd_flags) == -1) { |
88 | 0 | return errno; |
89 | 0 | } |
90 | | |
91 | | #else /* BEOS_BLOCKING */ |
92 | | |
93 | | # if BEOS_BONE /* This only works on BONE 0-6 */ |
94 | | int on = 1; |
95 | | if (ioctl(thepipe->filedes, FIONBIO, &on, sizeof(on)) < 0) { |
96 | | return errno; |
97 | | } |
98 | | # else /* "classic" BeOS doesn't support this at all */ |
99 | | return APR_ENOTIMPL; |
100 | | # endif |
101 | | |
102 | | #endif /* !BEOS_BLOCKING */ |
103 | | |
104 | 0 | thepipe->blocking = BLK_OFF; |
105 | 0 | return APR_SUCCESS; |
106 | 0 | } |
107 | | |
108 | | APR_DECLARE(apr_status_t) apr_file_pipe_timeout_set(apr_file_t *thepipe, apr_interval_time_t timeout) |
109 | 0 | { |
110 | 0 | if (thepipe->is_pipe == 1) { |
111 | 0 | thepipe->timeout = timeout; |
112 | 0 | if (timeout >= 0) { |
113 | 0 | if (thepipe->blocking != BLK_OFF) { /* blocking or unknown state */ |
114 | 0 | return pipenonblock(thepipe); |
115 | 0 | } |
116 | 0 | } |
117 | 0 | else { |
118 | 0 | if (thepipe->blocking != BLK_ON) { /* non-blocking or unknown state */ |
119 | 0 | return pipeblock(thepipe); |
120 | 0 | } |
121 | 0 | } |
122 | 0 | return APR_SUCCESS; |
123 | 0 | } |
124 | 0 | return APR_EINVAL; |
125 | 0 | } |
126 | | |
127 | | APR_DECLARE(apr_status_t) apr_file_pipe_timeout_get(apr_file_t *thepipe, apr_interval_time_t *timeout) |
128 | 0 | { |
129 | 0 | if (thepipe->is_pipe == 1) { |
130 | 0 | *timeout = thepipe->timeout; |
131 | 0 | return APR_SUCCESS; |
132 | 0 | } |
133 | 0 | return APR_EINVAL; |
134 | 0 | } |
135 | | |
136 | | APR_DECLARE(apr_status_t) apr_os_pipe_put_ex(apr_file_t **file, |
137 | | apr_os_file_t *thefile, |
138 | | int register_cleanup, |
139 | | apr_pool_t *pool) |
140 | 0 | { |
141 | 0 | int *dafile = thefile; |
142 | |
|
143 | 0 | (*file) = apr_pcalloc(pool, sizeof(apr_file_t)); |
144 | 0 | (*file)->pool = pool; |
145 | 0 | (*file)->eof_hit = 0; |
146 | 0 | (*file)->is_pipe = 1; |
147 | 0 | (*file)->blocking = BLK_UNKNOWN; /* app needs to make a timeout call */ |
148 | 0 | (*file)->timeout = -1; |
149 | 0 | (*file)->ungetchar = -1; /* no char avail */ |
150 | 0 | (*file)->filedes = *dafile; |
151 | 0 | if (!register_cleanup) { |
152 | 0 | (*file)->flags = APR_FOPEN_NOCLEANUP; |
153 | 0 | } |
154 | 0 | (*file)->buffered = 0; |
155 | 0 | #if APR_HAS_THREADS |
156 | 0 | (*file)->thlock = NULL; |
157 | 0 | #endif |
158 | 0 | if (register_cleanup) { |
159 | 0 | apr_pool_cleanup_register((*file)->pool, (void *)(*file), |
160 | 0 | apr_unix_file_cleanup, |
161 | 0 | apr_pool_cleanup_null); |
162 | 0 | } |
163 | | #ifndef WAITIO_USES_POLL |
164 | | /* Start out with no pollset. apr_wait_for_io_or_timeout() will |
165 | | * initialize the pollset if needed. |
166 | | */ |
167 | | (*file)->pollset = NULL; |
168 | | #endif |
169 | 0 | return APR_SUCCESS; |
170 | 0 | } |
171 | | |
172 | | APR_DECLARE(apr_status_t) apr_os_pipe_put(apr_file_t **file, |
173 | | apr_os_file_t *thefile, |
174 | | apr_pool_t *pool) |
175 | 0 | { |
176 | 0 | return apr_os_pipe_put_ex(file, thefile, 0, pool); |
177 | 0 | } |
178 | | |
179 | | static apr_status_t file_pipe_create(apr_file_t **in, |
180 | | apr_file_t **out, |
181 | | apr_int32_t blocking, |
182 | | apr_pool_t *pool_in, |
183 | | apr_pool_t *pool_out) |
184 | 0 | { |
185 | 0 | int filedes[2]; |
186 | |
|
187 | 0 | if (pipe(filedes) == -1) { |
188 | 0 | return errno; |
189 | 0 | } |
190 | | |
191 | 0 | (*in) = (apr_file_t *)apr_pcalloc(pool_in, sizeof(apr_file_t)); |
192 | 0 | (*in)->pool = pool_in; |
193 | 0 | (*in)->filedes = filedes[0]; |
194 | 0 | (*in)->is_pipe = 1; |
195 | 0 | (*in)->fname = NULL; |
196 | 0 | (*in)->buffered = 0; |
197 | 0 | (*in)->blocking = BLK_ON; |
198 | 0 | (*in)->timeout = -1; |
199 | 0 | (*in)->ungetchar = -1; |
200 | 0 | (*in)->flags = APR_INHERIT; |
201 | 0 | #if APR_HAS_THREADS |
202 | 0 | (*in)->thlock = NULL; |
203 | 0 | #endif |
204 | | #ifndef WAITIO_USES_POLL |
205 | | (*in)->pollset = NULL; |
206 | | #endif |
207 | 0 | (*out) = (apr_file_t *)apr_pcalloc(pool_out, sizeof(apr_file_t)); |
208 | 0 | (*out)->pool = pool_out; |
209 | 0 | (*out)->filedes = filedes[1]; |
210 | 0 | (*out)->is_pipe = 1; |
211 | 0 | (*out)->fname = NULL; |
212 | 0 | (*out)->buffered = 0; |
213 | 0 | (*out)->blocking = BLK_ON; |
214 | 0 | (*out)->flags = APR_INHERIT; |
215 | 0 | (*out)->timeout = -1; |
216 | 0 | #if APR_HAS_THREADS |
217 | 0 | (*out)->thlock = NULL; |
218 | 0 | #endif |
219 | | #ifndef WAITIO_USES_POLL |
220 | | (*out)->pollset = NULL; |
221 | | #endif |
222 | 0 | apr_pool_cleanup_register((*in)->pool, (void *)(*in), apr_unix_file_cleanup, |
223 | 0 | apr_pool_cleanup_null); |
224 | 0 | apr_pool_cleanup_register((*out)->pool, (void *)(*out), apr_unix_file_cleanup, |
225 | 0 | apr_pool_cleanup_null); |
226 | |
|
227 | 0 | switch (blocking) { |
228 | 0 | case APR_FULL_BLOCK: |
229 | 0 | break; |
230 | 0 | case APR_READ_BLOCK: |
231 | 0 | apr_file_pipe_timeout_set(*out, 0); |
232 | 0 | break; |
233 | 0 | case APR_WRITE_BLOCK: |
234 | 0 | apr_file_pipe_timeout_set(*in, 0); |
235 | 0 | break; |
236 | 0 | default: |
237 | 0 | apr_file_pipe_timeout_set(*out, 0); |
238 | 0 | apr_file_pipe_timeout_set(*in, 0); |
239 | 0 | break; |
240 | 0 | } |
241 | 0 | return APR_SUCCESS; |
242 | 0 | } |
243 | | |
244 | | APR_DECLARE(apr_status_t) apr_file_pipe_create(apr_file_t **in, |
245 | | apr_file_t **out, |
246 | | apr_pool_t *pool) |
247 | 0 | { |
248 | | /* Default is full blocking pipes. */ |
249 | 0 | return file_pipe_create(in, out, APR_FULL_BLOCK, pool, pool); |
250 | 0 | } |
251 | | |
252 | | APR_DECLARE(apr_status_t) apr_file_pipe_create_ex(apr_file_t **in, |
253 | | apr_file_t **out, |
254 | | apr_int32_t blocking, |
255 | | apr_pool_t *pool) |
256 | 0 | { |
257 | 0 | return file_pipe_create(in, out, blocking, pool, pool); |
258 | 0 | } |
259 | | |
260 | | APR_DECLARE(apr_status_t) apr_file_pipe_create_pools(apr_file_t **in, |
261 | | apr_file_t **out, |
262 | | apr_int32_t blocking, |
263 | | apr_pool_t *pool_in, |
264 | | apr_pool_t *pool_out) |
265 | 0 | { |
266 | 0 | return file_pipe_create(in, out, blocking, pool_in, pool_out); |
267 | 0 | } |
268 | | |
269 | | APR_DECLARE(apr_status_t) apr_file_namedpipe_create(const char *filename, |
270 | | apr_fileperms_t perm, apr_pool_t *pool) |
271 | 0 | { |
272 | 0 | mode_t mode = apr_unix_perms2mode(perm); |
273 | |
|
274 | 0 | if (mkfifo(filename, mode) == -1) { |
275 | 0 | return errno; |
276 | 0 | } |
277 | 0 | return APR_SUCCESS; |
278 | 0 | } |
279 | | |
280 | | |
281 | | |