Commit | Line | Data |
---|---|---|
7a24c346 | 1 | /* -*- c-file-style: "linux" -*- |
d62bcc17 WD |
2 | * |
3 | * Copyright (C) 1996-2001 by Andrew Tridgell | |
880da007 MP |
4 | * Copyright (C) Paul Mackerras 1996 |
5 | * Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org> | |
d62bcc17 | 6 | * |
880da007 MP |
7 | * This program is free software; you can redistribute it and/or modify |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
d62bcc17 | 11 | * |
880da007 MP |
12 | * This program is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
d62bcc17 | 16 | * |
880da007 MP |
17 | * You should have received a copy of the GNU General Public License |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
720b47f2 | 21 | |
87ee2481 | 22 | /** |
87ee2481 MP |
23 | * @file io.c |
24 | * | |
6ed6d7f5 | 25 | * Socket and pipe I/O utilities used in rsync. |
87ee2481 MP |
26 | * |
27 | * rsync provides its own multiplexing system, which is used to send | |
28 | * stderr and stdout over a single socket. We need this because | |
29 | * stdout normally carries the binary data stream, and stderr all our | |
30 | * error messages. | |
31 | * | |
32 | * For historical reasons this is off during the start of the | |
33 | * connection, but it's switched on quite early using | |
34 | * io_start_multiplex_out() and io_start_multiplex_in(). | |
35 | **/ | |
720b47f2 | 36 | |
720b47f2 AT |
37 | #include "rsync.h" |
38 | ||
880da007 | 39 | /** If no timeout is specified then use a 60 second select timeout */ |
8cd9fd4e AT |
40 | #define SELECT_TIMEOUT 60 |
41 | ||
8d9dc9f9 AT |
42 | static int io_multiplexing_out; |
43 | static int io_multiplexing_in; | |
76c21947 WD |
44 | static int multiplex_in_fd = -1; |
45 | static int multiplex_out_fd = -1; | |
8d9dc9f9 | 46 | static time_t last_io; |
7a55d06e MP |
47 | static int no_flush; |
48 | ||
49 | extern int bwlimit; | |
720b47f2 | 50 | extern int verbose; |
6ba9279f | 51 | extern int io_timeout; |
d17e1dd2 WD |
52 | extern int am_server; |
53 | extern int am_daemon; | |
54 | extern int am_sender; | |
a800434a | 55 | extern struct stats stats; |
720b47f2 | 56 | |
7a55d06e | 57 | |
a86179f4 | 58 | const char phase_unknown[] = "unknown"; |
805edf9d | 59 | |
98b332ed MP |
60 | /** |
61 | * The connection might be dropped at some point; perhaps because the | |
62 | * remote instance crashed. Just giving the offset on the stream is | |
63 | * not very helpful. So instead we try to make io_phase_name point to | |
64 | * something useful. | |
eca2adb4 | 65 | * |
6ed6d7f5 | 66 | * For buffered/multiplexed I/O these names will be somewhat |
805edf9d | 67 | * approximate; perhaps for ease of support we would rather make the |
6ed6d7f5 | 68 | * buffer always flush when a single application-level I/O finishes. |
805edf9d | 69 | * |
eca2adb4 MP |
70 | * @todo Perhaps we want some simple stack functionality, but there's |
71 | * no need to overdo it. | |
98b332ed | 72 | **/ |
805edf9d MP |
73 | const char *io_write_phase = phase_unknown; |
74 | const char *io_read_phase = phase_unknown; | |
98b332ed | 75 | |
7a55d06e MP |
76 | /** Ignore EOF errors while reading a module listing if the remote |
77 | version is 24 or less. */ | |
78 | int kludge_around_eof = False; | |
79 | ||
d17e1dd2 WD |
80 | int msg_fd_in = -1; |
81 | int msg_fd_out = -1; | |
7a55d06e | 82 | |
56014c8c WD |
83 | static int io_filesfrom_f_in = -1; |
84 | static int io_filesfrom_f_out = -1; | |
85 | static char io_filesfrom_buf[2048]; | |
86 | static char *io_filesfrom_bp; | |
87 | static char io_filesfrom_lastchar; | |
88 | static int io_filesfrom_buflen; | |
720b47f2 | 89 | |
9dd891bb | 90 | static void read_loop(int fd, char *buf, size_t len); |
ff41a59f | 91 | |
d17e1dd2 WD |
92 | struct redo_list { |
93 | struct redo_list *next; | |
94 | int num; | |
95 | }; | |
96 | ||
97 | static struct redo_list *redo_list_head; | |
98 | static struct redo_list *redo_list_tail; | |
99 | ||
100 | struct msg_list { | |
101 | struct msg_list *next; | |
102 | char *buf; | |
103 | int len; | |
104 | }; | |
105 | ||
106 | static struct msg_list *msg_list_head; | |
107 | static struct msg_list *msg_list_tail; | |
108 | ||
109 | static void redo_list_add(int num) | |
110 | { | |
111 | struct redo_list *rl; | |
112 | ||
113 | if (!(rl = new(struct redo_list))) | |
114 | exit_cleanup(RERR_MALLOC); | |
115 | rl->next = NULL; | |
116 | rl->num = num; | |
117 | if (redo_list_tail) | |
118 | redo_list_tail->next = rl; | |
119 | else | |
120 | redo_list_head = rl; | |
121 | redo_list_tail = rl; | |
122 | } | |
123 | ||
8d9dc9f9 AT |
124 | static void check_timeout(void) |
125 | { | |
126 | time_t t; | |
90ba34e2 | 127 | |
d17e1dd2 WD |
128 | if (!io_timeout) |
129 | return; | |
8d9dc9f9 AT |
130 | |
131 | if (!last_io) { | |
132 | last_io = time(NULL); | |
133 | return; | |
134 | } | |
135 | ||
136 | t = time(NULL); | |
137 | ||
86ffe37f | 138 | if (last_io && io_timeout && (t-last_io) >= io_timeout) { |
0adb99b9 | 139 | if (!am_server && !am_daemon) { |
d62bcc17 | 140 | rprintf(FERROR, "io timeout after %d seconds - exiting\n", |
0adb99b9 AT |
141 | (int)(t-last_io)); |
142 | } | |
65417579 | 143 | exit_cleanup(RERR_TIMEOUT); |
8d9dc9f9 AT |
144 | } |
145 | } | |
146 | ||
d17e1dd2 WD |
147 | /** Setup the fd used to receive MSG_* messages. Only needed when |
148 | * we're the generator because the sender and receiver both use the | |
6ed6d7f5 | 149 | * multiplexed I/O setup. */ |
d17e1dd2 WD |
150 | void set_msg_fd_in(int fd) |
151 | { | |
152 | msg_fd_in = fd; | |
153 | } | |
154 | ||
155 | /** Setup the fd used to send our MSG_* messages. Only needed when | |
156 | * we're the receiver because the generator and the sender both use | |
6ed6d7f5 | 157 | * the multiplexed I/O setup. */ |
d17e1dd2 WD |
158 | void set_msg_fd_out(int fd) |
159 | { | |
160 | msg_fd_out = fd; | |
161 | set_nonblocking(msg_fd_out); | |
162 | } | |
163 | ||
164 | /* Add a message to the pending MSG_* list. */ | |
165 | static void msg_list_add(int code, char *buf, int len) | |
554e0a8d | 166 | { |
d17e1dd2 WD |
167 | struct msg_list *ml; |
168 | ||
169 | if (!(ml = new(struct msg_list))) | |
170 | exit_cleanup(RERR_MALLOC); | |
171 | ml->next = NULL; | |
172 | if (!(ml->buf = new_array(char, len+4))) | |
173 | exit_cleanup(RERR_MALLOC); | |
174 | SIVAL(ml->buf, 0, ((code+MPLEX_BASE)<<24) | len); | |
175 | memcpy(ml->buf+4, buf, len); | |
176 | ml->len = len+4; | |
177 | if (msg_list_tail) | |
178 | msg_list_tail->next = ml; | |
179 | else | |
180 | msg_list_head = ml; | |
181 | msg_list_tail = ml; | |
554e0a8d AT |
182 | } |
183 | ||
d17e1dd2 WD |
184 | void send_msg(enum msgcode code, char *buf, int len) |
185 | { | |
186 | msg_list_add(code, buf, len); | |
187 | msg_list_push(NORMAL_FLUSH); | |
188 | } | |
189 | ||
190 | /** Read a message from the MSG_* fd and dispatch it. This is only | |
191 | * called by the generator. */ | |
192 | static void read_msg_fd(void) | |
554e0a8d AT |
193 | { |
194 | char buf[200]; | |
06ce139f | 195 | size_t n; |
d17e1dd2 | 196 | int fd = msg_fd_in; |
ff41a59f AT |
197 | int tag, len; |
198 | ||
d17e1dd2 WD |
199 | /* Temporarily disable msg_fd_in. This is needed because we |
200 | * may call a write routine that could try to call us back. */ | |
201 | msg_fd_in = -1; | |
554e0a8d | 202 | |
ff41a59f AT |
203 | read_loop(fd, buf, 4); |
204 | tag = IVAL(buf, 0); | |
205 | ||
206 | len = tag & 0xFFFFFF; | |
d17e1dd2 | 207 | tag = (tag >> 24) - MPLEX_BASE; |
ff41a59f | 208 | |
d17e1dd2 WD |
209 | switch (tag) { |
210 | case MSG_DONE: | |
13c7bcbb WD |
211 | if (len != 0) { |
212 | rprintf(FERROR, "invalid message %d:%d\n", tag, len); | |
d17e1dd2 | 213 | exit_cleanup(RERR_STREAMIO); |
13c7bcbb | 214 | } |
d17e1dd2 WD |
215 | redo_list_add(-1); |
216 | break; | |
217 | case MSG_REDO: | |
13c7bcbb WD |
218 | if (len != 4) { |
219 | rprintf(FERROR, "invalid message %d:%d\n", tag, len); | |
d17e1dd2 | 220 | exit_cleanup(RERR_STREAMIO); |
13c7bcbb | 221 | } |
d17e1dd2 WD |
222 | read_loop(fd, buf, 4); |
223 | redo_list_add(IVAL(buf,0)); | |
224 | break; | |
225 | case MSG_INFO: | |
226 | case MSG_ERROR: | |
227 | case MSG_LOG: | |
228 | while (len) { | |
229 | n = len; | |
230 | if (n >= sizeof buf) | |
231 | n = sizeof buf - 1; | |
232 | read_loop(fd, buf, n); | |
233 | rwrite((enum logcode)tag, buf, n); | |
234 | len -= n; | |
235 | } | |
236 | break; | |
237 | default: | |
13c7bcbb | 238 | rprintf(FERROR, "unknown message %d:%d\n", tag, len); |
d17e1dd2 WD |
239 | exit_cleanup(RERR_STREAMIO); |
240 | } | |
241 | ||
242 | msg_fd_in = fd; | |
243 | } | |
244 | ||
245 | /* Try to push messages off the list onto the wire. If we leave with more | |
246 | * to do, return 0. On error, return -1. If everything flushed, return 1. | |
247 | * This is only called by the receiver. */ | |
248 | int msg_list_push(int flush_it_all) | |
249 | { | |
250 | static int written = 0; | |
251 | struct timeval tv; | |
252 | fd_set fds; | |
253 | ||
254 | if (msg_fd_out < 0) | |
255 | return -1; | |
256 | ||
257 | while (msg_list_head) { | |
258 | struct msg_list *ml = msg_list_head; | |
259 | int n = write(msg_fd_out, ml->buf + written, ml->len - written); | |
260 | if (n < 0) { | |
261 | if (errno == EINTR) | |
262 | continue; | |
263 | if (errno != EWOULDBLOCK && errno != EAGAIN) | |
264 | return -1; | |
265 | if (!flush_it_all) | |
266 | return 0; | |
267 | FD_ZERO(&fds); | |
268 | FD_SET(msg_fd_out, &fds); | |
269 | tv.tv_sec = io_timeout ? io_timeout : SELECT_TIMEOUT; | |
270 | tv.tv_usec = 0; | |
271 | if (!select(msg_fd_out+1, NULL, &fds, NULL, &tv)) | |
272 | check_timeout(); | |
273 | } else if ((written += n) == ml->len) { | |
274 | free(ml->buf); | |
275 | msg_list_head = ml->next; | |
276 | if (!msg_list_head) | |
277 | msg_list_tail = NULL; | |
278 | free(ml); | |
279 | written = 0; | |
280 | } | |
554e0a8d | 281 | } |
d17e1dd2 WD |
282 | return 1; |
283 | } | |
284 | ||
285 | int get_redo_num(void) | |
286 | { | |
287 | struct redo_list *next; | |
288 | int num; | |
289 | ||
290 | while (!redo_list_head) | |
291 | read_msg_fd(); | |
554e0a8d | 292 | |
d17e1dd2 WD |
293 | num = redo_list_head->num; |
294 | next = redo_list_head->next; | |
295 | free(redo_list_head); | |
296 | redo_list_head = next; | |
297 | if (!next) | |
298 | redo_list_tail = NULL; | |
299 | ||
300 | return num; | |
554e0a8d AT |
301 | } |
302 | ||
56014c8c WD |
303 | /** |
304 | * When we're the receiver and we have a local --files-from list of names | |
305 | * that needs to be sent over the socket to the sender, we have to do two | |
306 | * things at the same time: send the sender a list of what files we're | |
307 | * processing and read the incoming file+info list from the sender. We do | |
308 | * this by augmenting the read_timeout() function to copy this data. It | |
309 | * uses the io_filesfrom_buf to read a block of data from f_in (when it is | |
310 | * ready, since it might be a pipe) and then blast it out f_out (when it | |
311 | * is ready to receive more data). | |
312 | */ | |
313 | void io_set_filesfrom_fds(int f_in, int f_out) | |
314 | { | |
315 | io_filesfrom_f_in = f_in; | |
316 | io_filesfrom_f_out = f_out; | |
317 | io_filesfrom_bp = io_filesfrom_buf; | |
318 | io_filesfrom_lastchar = '\0'; | |
319 | io_filesfrom_buflen = 0; | |
320 | } | |
720b47f2 | 321 | |
880da007 MP |
322 | /** |
323 | * It's almost always an error to get an EOF when we're trying to read | |
324 | * from the network, because the protocol is self-terminating. | |
325 | * | |
326 | * However, there is one unfortunate cases where it is not, which is | |
327 | * rsync <2.4.6 sending a list of modules on a server, since the list | |
328 | * is terminated by closing the socket. So, for the section of the | |
329 | * program where that is a problem (start_socket_client), | |
330 | * kludge_around_eof is True and we just exit. | |
331 | */ | |
3151cbae | 332 | static void whine_about_eof(void) |
7a55d06e | 333 | { |
7a55d06e | 334 | if (kludge_around_eof) |
3151cbae | 335 | exit_cleanup(0); |
7a55d06e | 336 | else { |
d62bcc17 | 337 | rprintf(FERROR, RSYNC_NAME ": connection unexpectedly closed " |
3151cbae | 338 | "(%.0f bytes read so far)\n", |
d62bcc17 | 339 | (double)stats.total_read); |
3151cbae WD |
340 | |
341 | exit_cleanup(RERR_STREAMIO); | |
7a55d06e MP |
342 | } |
343 | } | |
720b47f2 | 344 | |
7a55d06e | 345 | |
3151cbae | 346 | static void die_from_readerr(int err) |
7a55d06e MP |
347 | { |
348 | /* this prevents us trying to write errors on a dead socket */ | |
349 | io_multiplexing_close(); | |
3151cbae | 350 | |
d62bcc17 | 351 | rsyserr(FERROR, err, "read error"); |
7a55d06e MP |
352 | exit_cleanup(RERR_STREAMIO); |
353 | } | |
354 | ||
355 | ||
880da007 | 356 | /** |
6ed6d7f5 | 357 | * Read from a socket with I/O timeout. return the number of bytes |
c3563c46 MP |
358 | * read. If no bytes can be read then exit, never return a number <= 0. |
359 | * | |
8886f8d0 MP |
360 | * TODO: If the remote shell connection fails, then current versions |
361 | * actually report an "unexpected EOF" error here. Since it's a | |
362 | * fairly common mistake to try to use rsh when ssh is required, we | |
363 | * should trap that: if we fail to read any data at all, we should | |
364 | * give a better explanation. We can tell whether the connection has | |
365 | * started by looking e.g. at whether the remote version is known yet. | |
c3563c46 | 366 | */ |
3151cbae | 367 | static int read_timeout(int fd, char *buf, size_t len) |
8d9dc9f9 | 368 | { |
d62bcc17 | 369 | int n, ret = 0; |
4c36ddbe | 370 | |
d17e1dd2 | 371 | io_flush(NORMAL_FLUSH); |
ea2111d1 | 372 | |
4c36ddbe | 373 | while (ret == 0) { |
7a55d06e | 374 | /* until we manage to read *something* */ |
56014c8c | 375 | fd_set r_fds, w_fds; |
4c36ddbe | 376 | struct timeval tv; |
554e0a8d | 377 | int fd_count = fd+1; |
a57873b7 | 378 | int count; |
4c36ddbe | 379 | |
56014c8c WD |
380 | FD_ZERO(&r_fds); |
381 | FD_SET(fd, &r_fds); | |
d17e1dd2 WD |
382 | if (msg_fd_in >= 0) { |
383 | FD_SET(msg_fd_in, &r_fds); | |
384 | if (msg_fd_in >= fd_count) | |
385 | fd_count = msg_fd_in+1; | |
56014c8c | 386 | } |
3309507d | 387 | if (io_filesfrom_f_out >= 0) { |
56014c8c WD |
388 | int new_fd; |
389 | if (io_filesfrom_buflen == 0) { | |
3309507d | 390 | if (io_filesfrom_f_in >= 0) { |
56014c8c WD |
391 | FD_SET(io_filesfrom_f_in, &r_fds); |
392 | new_fd = io_filesfrom_f_in; | |
393 | } else { | |
394 | io_filesfrom_f_out = -1; | |
395 | new_fd = -1; | |
396 | } | |
397 | } else { | |
398 | FD_ZERO(&w_fds); | |
399 | FD_SET(io_filesfrom_f_out, &w_fds); | |
400 | new_fd = io_filesfrom_f_out; | |
401 | } | |
d17e1dd2 WD |
402 | if (new_fd >= fd_count) |
403 | fd_count = new_fd+1; | |
554e0a8d AT |
404 | } |
405 | ||
8cd9fd4e | 406 | tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT; |
4c36ddbe AT |
407 | tv.tv_usec = 0; |
408 | ||
554e0a8d AT |
409 | errno = 0; |
410 | ||
56014c8c WD |
411 | count = select(fd_count, &r_fds, |
412 | io_filesfrom_buflen? &w_fds : NULL, | |
413 | NULL, &tv); | |
a57873b7 AT |
414 | |
415 | if (count == 0) { | |
d17e1dd2 | 416 | msg_list_push(NORMAL_FLUSH); |
a57873b7 AT |
417 | check_timeout(); |
418 | } | |
419 | ||
420 | if (count <= 0) { | |
554e0a8d AT |
421 | if (errno == EBADF) { |
422 | exit_cleanup(RERR_SOCKETIO); | |
423 | } | |
4c36ddbe AT |
424 | continue; |
425 | } | |
426 | ||
d17e1dd2 WD |
427 | if (msg_fd_in >= 0 && FD_ISSET(msg_fd_in, &r_fds)) |
428 | read_msg_fd(); | |
554e0a8d | 429 | |
3309507d | 430 | if (io_filesfrom_f_out >= 0) { |
56014c8c WD |
431 | if (io_filesfrom_buflen) { |
432 | if (FD_ISSET(io_filesfrom_f_out, &w_fds)) { | |
433 | int l = write(io_filesfrom_f_out, | |
434 | io_filesfrom_bp, | |
435 | io_filesfrom_buflen); | |
436 | if (l > 0) { | |
437 | if (!(io_filesfrom_buflen -= l)) | |
438 | io_filesfrom_bp = io_filesfrom_buf; | |
439 | else | |
440 | io_filesfrom_bp += l; | |
441 | } else { | |
442 | /* XXX should we complain? */ | |
443 | io_filesfrom_f_out = -1; | |
444 | } | |
445 | } | |
3309507d | 446 | } else if (io_filesfrom_f_in >= 0) { |
56014c8c WD |
447 | if (FD_ISSET(io_filesfrom_f_in, &r_fds)) { |
448 | int l = read(io_filesfrom_f_in, | |
449 | io_filesfrom_buf, | |
450 | sizeof io_filesfrom_buf); | |
451 | if (l <= 0) { | |
452 | /* Send end-of-file marker */ | |
453 | io_filesfrom_buf[0] = '\0'; | |
454 | io_filesfrom_buf[1] = '\0'; | |
455 | io_filesfrom_buflen = io_filesfrom_lastchar? 2 : 1; | |
456 | io_filesfrom_f_in = -1; | |
457 | } else { | |
458 | extern int eol_nulls; | |
459 | if (!eol_nulls) { | |
460 | char *s = io_filesfrom_buf + l; | |
461 | /* Transform CR and/or LF into '\0' */ | |
462 | while (s-- > io_filesfrom_buf) { | |
463 | if (*s == '\n' || *s == '\r') | |
464 | *s = '\0'; | |
465 | } | |
466 | } | |
467 | if (!io_filesfrom_lastchar) { | |
468 | /* Last buf ended with a '\0', so don't | |
469 | * let this buf start with one. */ | |
470 | while (l && !*io_filesfrom_bp) | |
471 | io_filesfrom_bp++, l--; | |
472 | } | |
473 | if (!l) | |
474 | io_filesfrom_bp = io_filesfrom_buf; | |
475 | else { | |
476 | char *f = io_filesfrom_bp; | |
477 | char *t = f; | |
478 | char *eob = f + l; | |
479 | /* Eliminate any multi-'\0' runs. */ | |
480 | while (f != eob) { | |
481 | if (!(*t++ = *f++)) { | |
482 | while (f != eob && !*f) | |
483 | f++, l--; | |
484 | } | |
485 | } | |
486 | io_filesfrom_lastchar = f[-1]; | |
487 | } | |
488 | io_filesfrom_buflen = l; | |
489 | } | |
490 | } | |
491 | } | |
492 | } | |
493 | ||
494 | if (!FD_ISSET(fd, &r_fds)) continue; | |
554e0a8d | 495 | |
4c36ddbe AT |
496 | n = read(fd, buf, len); |
497 | ||
8d9dc9f9 AT |
498 | if (n > 0) { |
499 | buf += n; | |
500 | len -= n; | |
4c36ddbe AT |
501 | ret += n; |
502 | if (io_timeout) | |
503 | last_io = time(NULL); | |
504 | continue; | |
7a55d06e | 505 | } else if (n == 0) { |
3151cbae | 506 | whine_about_eof(); |
7a55d06e | 507 | return -1; /* doesn't return */ |
3309507d | 508 | } else if (n < 0) { |
d62bcc17 WD |
509 | if (errno == EINTR || errno == EWOULDBLOCK |
510 | || errno == EAGAIN) | |
7a55d06e | 511 | continue; |
3151cbae | 512 | die_from_readerr(errno); |
8d9dc9f9 | 513 | } |
4c36ddbe | 514 | } |
8d9dc9f9 | 515 | |
4c36ddbe AT |
516 | return ret; |
517 | } | |
8d9dc9f9 | 518 | |
56014c8c WD |
519 | /** |
520 | * Read a line into the "fname" buffer (which must be at least MAXPATHLEN | |
521 | * characters long). | |
522 | */ | |
523 | int read_filesfrom_line(int fd, char *fname) | |
524 | { | |
525 | char ch, *s, *eob = fname + MAXPATHLEN - 1; | |
526 | int cnt; | |
527 | extern int io_timeout; | |
528 | extern int eol_nulls; | |
529 | extern char *remote_filesfrom_file; | |
55d5937d | 530 | int reading_remotely = remote_filesfrom_file != NULL; |
56014c8c WD |
531 | int nulls = eol_nulls || reading_remotely; |
532 | ||
533 | start: | |
534 | s = fname; | |
535 | while (1) { | |
536 | cnt = read(fd, &ch, 1); | |
537 | if (cnt < 0 && (errno == EWOULDBLOCK | |
538 | || errno == EINTR || errno == EAGAIN)) { | |
539 | struct timeval tv; | |
540 | fd_set fds; | |
541 | FD_ZERO(&fds); | |
542 | FD_SET(fd, &fds); | |
543 | tv.tv_sec = io_timeout? io_timeout : SELECT_TIMEOUT; | |
544 | tv.tv_usec = 0; | |
545 | if (!select(fd+1, &fds, NULL, NULL, &tv)) | |
546 | check_timeout(); | |
547 | continue; | |
548 | } | |
549 | if (cnt != 1) | |
550 | break; | |
551 | if (nulls? !ch : (ch == '\r' || ch == '\n')) { | |
552 | /* Skip empty lines if reading locally. */ | |
553 | if (!reading_remotely && s == fname) | |
554 | continue; | |
555 | break; | |
556 | } | |
557 | if (s < eob) | |
558 | *s++ = ch; | |
559 | } | |
560 | *s = '\0'; | |
7a55d06e | 561 | |
6b45fcf1 WD |
562 | /* Dump comments. */ |
563 | if (*fname == '#' || *fname == ';') | |
56014c8c WD |
564 | goto start; |
565 | ||
566 | return s - fname; | |
567 | } | |
7a55d06e MP |
568 | |
569 | ||
880da007 MP |
570 | /** |
571 | * Continue trying to read len bytes - don't return until len has been | |
572 | * read. | |
573 | **/ | |
3151cbae | 574 | static void read_loop(int fd, char *buf, size_t len) |
4c36ddbe AT |
575 | { |
576 | while (len) { | |
577 | int n = read_timeout(fd, buf, len); | |
578 | ||
579 | buf += n; | |
580 | len -= n; | |
8d9dc9f9 AT |
581 | } |
582 | } | |
583 | ||
7a55d06e MP |
584 | |
585 | /** | |
586 | * Read from the file descriptor handling multiplexing - return number | |
587 | * of bytes read. | |
d62bcc17 WD |
588 | * |
589 | * Never returns <= 0. | |
7a55d06e | 590 | */ |
9dd891bb | 591 | static int read_unbuffered(int fd, char *buf, size_t len) |
8d9dc9f9 | 592 | { |
6fe25398 | 593 | static size_t remaining; |
909ce14f | 594 | int tag, ret = 0; |
8d9dc9f9 | 595 | char line[1024]; |
76c21947 WD |
596 | static char *buffer; |
597 | static size_t bufferIdx = 0; | |
598 | static size_t bufferSz; | |
8d9dc9f9 | 599 | |
76c21947 | 600 | if (fd != multiplex_in_fd) |
4c36ddbe | 601 | return read_timeout(fd, buf, len); |
8d9dc9f9 | 602 | |
76c21947 WD |
603 | if (!io_multiplexing_in && remaining == 0) { |
604 | if (!buffer) { | |
605 | bufferSz = 2 * IO_BUFFER_SIZE; | |
606 | buffer = new_array(char, bufferSz); | |
607 | if (!buffer) out_of_memory("read_unbuffered"); | |
608 | } | |
609 | remaining = read_timeout(fd, buffer, bufferSz); | |
610 | bufferIdx = 0; | |
611 | } | |
612 | ||
8d9dc9f9 AT |
613 | while (ret == 0) { |
614 | if (remaining) { | |
615 | len = MIN(len, remaining); | |
76c21947 WD |
616 | memcpy(buf, buffer + bufferIdx, len); |
617 | bufferIdx += len; | |
8d9dc9f9 AT |
618 | remaining -= len; |
619 | ret = len; | |
76c21947 | 620 | break; |
8d9dc9f9 AT |
621 | } |
622 | ||
909ce14f | 623 | read_loop(fd, line, 4); |
ff41a59f | 624 | tag = IVAL(line, 0); |
679e7657 | 625 | |
8d9dc9f9 | 626 | remaining = tag & 0xFFFFFF; |
d17e1dd2 | 627 | tag = (tag >> 24) - MPLEX_BASE; |
8d9dc9f9 | 628 | |
d17e1dd2 WD |
629 | switch (tag) { |
630 | case MSG_DATA: | |
76c21947 WD |
631 | if (!buffer || remaining > bufferSz) { |
632 | buffer = realloc_array(buffer, char, remaining); | |
633 | if (!buffer) out_of_memory("read_unbuffered"); | |
634 | bufferSz = remaining; | |
635 | } | |
636 | read_loop(fd, buffer, remaining); | |
637 | bufferIdx = 0; | |
d17e1dd2 WD |
638 | break; |
639 | case MSG_INFO: | |
640 | case MSG_ERROR: | |
641 | if (remaining >= sizeof line) { | |
642 | rprintf(FERROR, "multiplexing overflow %d:%ld\n\n", | |
643 | tag, (long)remaining); | |
644 | exit_cleanup(RERR_STREAMIO); | |
645 | } | |
646 | read_loop(fd, line, remaining); | |
647 | rwrite((enum logcode)tag, line, remaining); | |
648 | remaining = 0; | |
649 | break; | |
650 | default: | |
909ce14f | 651 | rprintf(FERROR, "unexpected tag %d\n", tag); |
65417579 | 652 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 | 653 | } |
8d9dc9f9 AT |
654 | } |
655 | ||
76c21947 | 656 | if (remaining == 0) |
d17e1dd2 | 657 | io_flush(NORMAL_FLUSH); |
76c21947 | 658 | |
8d9dc9f9 AT |
659 | return ret; |
660 | } | |
661 | ||
662 | ||
909ce14f | 663 | |
880da007 MP |
664 | /** |
665 | * Do a buffered read from @p fd. Don't return until all @p n bytes | |
666 | * have been read. If all @p n can't be read then exit with an | |
667 | * error. | |
668 | **/ | |
3151cbae | 669 | static void readfd(int fd, char *buffer, size_t N) |
720b47f2 | 670 | { |
6ba9279f | 671 | int ret; |
d62bcc17 | 672 | size_t total = 0; |
3151cbae | 673 | |
6ba9279f | 674 | while (total < N) { |
3151cbae | 675 | ret = read_unbuffered(fd, buffer + total, N-total); |
6ba9279f | 676 | total += ret; |
7f28dbee | 677 | } |
1b7c47cb AT |
678 | |
679 | stats.total_read += total; | |
720b47f2 AT |
680 | } |
681 | ||
682 | ||
b7922338 | 683 | int32 read_int(int f) |
720b47f2 | 684 | { |
4c36ddbe | 685 | char b[4]; |
d730b113 AT |
686 | int32 ret; |
687 | ||
4c36ddbe | 688 | readfd(f,b,4); |
d730b113 AT |
689 | ret = IVAL(b,0); |
690 | if (ret == (int32)0xffffffff) return -1; | |
691 | return ret; | |
720b47f2 AT |
692 | } |
693 | ||
71c46176 | 694 | int64 read_longint(int f) |
3a6a366f | 695 | { |
71c46176 | 696 | int64 ret; |
3a6a366f AT |
697 | char b[8]; |
698 | ret = read_int(f); | |
71c46176 | 699 | |
8de330a3 AT |
700 | if ((int32)ret != (int32)0xffffffff) { |
701 | return ret; | |
702 | } | |
71c46176 | 703 | |
3bee6733 | 704 | #ifdef NO_INT64 |
9486289c | 705 | rprintf(FERROR,"Integer overflow - attempted 64 bit offset\n"); |
65417579 | 706 | exit_cleanup(RERR_UNSUPPORTED); |
71c46176 | 707 | #else |
91c4da3f S |
708 | readfd(f,b,8); |
709 | ret = IVAL(b,0) | (((int64)IVAL(b,4))<<32); | |
71c46176 AT |
710 | #endif |
711 | ||
3a6a366f AT |
712 | return ret; |
713 | } | |
714 | ||
9dd891bb | 715 | void read_buf(int f,char *buf,size_t len) |
720b47f2 | 716 | { |
4c36ddbe | 717 | readfd(f,buf,len); |
720b47f2 AT |
718 | } |
719 | ||
9dd891bb | 720 | void read_sbuf(int f,char *buf,size_t len) |
575f2fca | 721 | { |
3151cbae | 722 | read_buf(f,buf,len); |
575f2fca AT |
723 | buf[len] = 0; |
724 | } | |
725 | ||
182dca5c AT |
726 | unsigned char read_byte(int f) |
727 | { | |
4c36ddbe | 728 | unsigned char c; |
3151cbae | 729 | read_buf(f, (char *)&c, 1); |
4c36ddbe | 730 | return c; |
182dca5c | 731 | } |
720b47f2 | 732 | |
880da007 | 733 | |
08571358 MP |
734 | /** |
735 | * Sleep after writing to limit I/O bandwidth usage. | |
736 | * | |
737 | * @todo Rather than sleeping after each write, it might be better to | |
738 | * use some kind of averaging. The current algorithm seems to always | |
739 | * use a bit less bandwidth than specified, because it doesn't make up | |
740 | * for slow periods. But arguably this is a feature. In addition, we | |
741 | * ought to take the time used to write the data into account. | |
742 | **/ | |
743 | static void sleep_for_bwlimit(int bytes_written) | |
744 | { | |
745 | struct timeval tv; | |
746 | ||
747 | if (!bwlimit) | |
748 | return; | |
e681e820 MP |
749 | |
750 | assert(bytes_written > 0); | |
751 | assert(bwlimit > 0); | |
3151cbae | 752 | |
08571358 | 753 | tv.tv_usec = bytes_written * 1000 / bwlimit; |
e681e820 MP |
754 | tv.tv_sec = tv.tv_usec / 1000000; |
755 | tv.tv_usec = tv.tv_usec % 1000000; | |
08571358 | 756 | |
98b332ed | 757 | select(0, NULL, NULL, NULL, &tv); |
08571358 MP |
758 | } |
759 | ||
760 | ||
880da007 MP |
761 | /** |
762 | * Write len bytes to the file descriptor @p fd. | |
763 | * | |
764 | * This function underlies the multiplexing system. The body of the | |
765 | * application never calls this function directly. | |
766 | **/ | |
9dd891bb | 767 | static void writefd_unbuffered(int fd,char *buf,size_t len) |
720b47f2 | 768 | { |
06ce139f | 769 | size_t total = 0; |
8d9dc9f9 | 770 | fd_set w_fds, r_fds; |
4c36ddbe | 771 | int fd_count, count; |
8d9dc9f9 | 772 | struct timeval tv; |
720b47f2 | 773 | |
d17e1dd2 | 774 | msg_list_push(NORMAL_FLUSH); |
90ba34e2 | 775 | |
e44f9a12 AT |
776 | no_flush++; |
777 | ||
4c36ddbe | 778 | while (total < len) { |
8d9dc9f9 | 779 | FD_ZERO(&w_fds); |
8d9dc9f9 | 780 | FD_SET(fd,&w_fds); |
554e0a8d | 781 | fd_count = fd; |
4c36ddbe | 782 | |
d17e1dd2 | 783 | if (msg_fd_in >= 0) { |
56014c8c | 784 | FD_ZERO(&r_fds); |
d17e1dd2 | 785 | FD_SET(msg_fd_in,&r_fds); |
d62bcc17 | 786 | if (msg_fd_in > fd_count) |
d17e1dd2 | 787 | fd_count = msg_fd_in; |
8d9dc9f9 AT |
788 | } |
789 | ||
8cd9fd4e | 790 | tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT; |
8d9dc9f9 | 791 | tv.tv_usec = 0; |
4c36ddbe | 792 | |
554e0a8d | 793 | errno = 0; |
d17e1dd2 WD |
794 | count = select(fd_count+1, msg_fd_in >= 0 ? &r_fds : NULL, |
795 | &w_fds, NULL, &tv); | |
4c36ddbe | 796 | |
a57873b7 | 797 | if (count == 0) { |
d17e1dd2 | 798 | msg_list_push(NORMAL_FLUSH); |
a57873b7 AT |
799 | check_timeout(); |
800 | } | |
801 | ||
4c36ddbe | 802 | if (count <= 0) { |
554e0a8d AT |
803 | if (errno == EBADF) { |
804 | exit_cleanup(RERR_SOCKETIO); | |
805 | } | |
8d9dc9f9 AT |
806 | continue; |
807 | } | |
4c36ddbe | 808 | |
d17e1dd2 WD |
809 | if (msg_fd_in >= 0 && FD_ISSET(msg_fd_in, &r_fds)) |
810 | read_msg_fd(); | |
554e0a8d | 811 | |
8d9dc9f9 | 812 | if (FD_ISSET(fd, &w_fds)) { |
06ce139f MP |
813 | int ret; |
814 | size_t n = len-total; | |
f0359dd0 | 815 | ret = write(fd,buf+total,n); |
4c36ddbe | 816 | |
3309507d WD |
817 | if (ret < 0) { |
818 | if (errno == EINTR) | |
819 | continue; | |
820 | if (errno == EWOULDBLOCK || errno == EAGAIN) { | |
821 | msleep(1); | |
822 | continue; | |
823 | } | |
f0359dd0 AT |
824 | } |
825 | ||
4c36ddbe | 826 | if (ret <= 0) { |
befbfe61 MP |
827 | /* Don't try to write errors back |
828 | * across the stream */ | |
829 | io_multiplexing_close(); | |
d62bcc17 WD |
830 | rsyserr(FERROR, errno, |
831 | "writefd_unbuffered failed to write %ld bytes: phase \"%s\"", | |
832 | (long) len, io_write_phase); | |
65417579 | 833 | exit_cleanup(RERR_STREAMIO); |
4c36ddbe AT |
834 | } |
835 | ||
08571358 | 836 | sleep_for_bwlimit(ret); |
d62bcc17 | 837 | |
4c36ddbe | 838 | total += ret; |
a800434a | 839 | |
4c36ddbe AT |
840 | if (io_timeout) |
841 | last_io = time(NULL); | |
8d9dc9f9 | 842 | } |
4c36ddbe | 843 | } |
e44f9a12 AT |
844 | |
845 | no_flush--; | |
720b47f2 AT |
846 | } |
847 | ||
8d9dc9f9 | 848 | |
d6dead6b AT |
849 | static char *io_buffer; |
850 | static int io_buffer_count; | |
851 | ||
76c21947 | 852 | void io_start_buffering_out(int fd) |
d6dead6b | 853 | { |
8d9dc9f9 | 854 | if (io_buffer) return; |
679e7657 | 855 | multiplex_out_fd = fd; |
58cadc86 | 856 | io_buffer = new_array(char, IO_BUFFER_SIZE); |
d6dead6b AT |
857 | if (!io_buffer) out_of_memory("writefd"); |
858 | io_buffer_count = 0; | |
ff41a59f AT |
859 | } |
860 | ||
76c21947 WD |
861 | void io_start_buffering_in(int fd) |
862 | { | |
863 | multiplex_in_fd = fd; | |
864 | } | |
865 | ||
880da007 MP |
866 | /** |
867 | * Write an message to a multiplexed stream. If this fails then rsync | |
868 | * exits. | |
869 | **/ | |
d17e1dd2 | 870 | static void mplex_write(int fd, enum msgcode code, char *buf, size_t len) |
ff41a59f AT |
871 | { |
872 | char buffer[4096]; | |
06ce139f | 873 | size_t n = len; |
8d9dc9f9 | 874 | |
ff41a59f AT |
875 | SIVAL(buffer, 0, ((MPLEX_BASE + (int)code)<<24) + len); |
876 | ||
3151cbae WD |
877 | if (n > (sizeof buffer - 4)) { |
878 | n = sizeof buffer - 4; | |
ff41a59f AT |
879 | } |
880 | ||
881 | memcpy(&buffer[4], buf, n); | |
882 | writefd_unbuffered(fd, buffer, n+4); | |
883 | ||
884 | len -= n; | |
885 | buf += n; | |
886 | ||
6d7b6081 AT |
887 | if (len) { |
888 | writefd_unbuffered(fd, buf, len); | |
889 | } | |
d6dead6b AT |
890 | } |
891 | ||
ff41a59f | 892 | |
d17e1dd2 | 893 | void io_flush(int flush_it_all) |
d6dead6b | 894 | { |
679e7657 | 895 | int fd = multiplex_out_fd; |
d62bcc17 | 896 | |
d17e1dd2 | 897 | msg_list_push(flush_it_all); |
90ba34e2 | 898 | |
d17e1dd2 WD |
899 | if (!io_buffer_count || no_flush) |
900 | return; | |
8d9dc9f9 | 901 | |
d17e1dd2 WD |
902 | if (io_multiplexing_out) |
903 | mplex_write(fd, MSG_DATA, io_buffer, io_buffer_count); | |
904 | else | |
4c36ddbe | 905 | writefd_unbuffered(fd, io_buffer, io_buffer_count); |
8d9dc9f9 AT |
906 | io_buffer_count = 0; |
907 | } | |
908 | ||
0ba48136 | 909 | |
7b5c3eb0 | 910 | void io_end_buffering(void) |
8d9dc9f9 | 911 | { |
d17e1dd2 | 912 | io_flush(NORMAL_FLUSH); |
8d9dc9f9 | 913 | if (!io_multiplexing_out) { |
ff41a59f | 914 | free(io_buffer); |
8d9dc9f9 AT |
915 | io_buffer = NULL; |
916 | } | |
d6dead6b AT |
917 | } |
918 | ||
9dd891bb | 919 | static void writefd(int fd,char *buf,size_t len) |
d6dead6b | 920 | { |
1b7c47cb AT |
921 | stats.total_written += len; |
922 | ||
d17e1dd2 | 923 | msg_list_push(NORMAL_FLUSH); |
90ba34e2 | 924 | |
554e0a8d | 925 | if (!io_buffer || fd != multiplex_out_fd) { |
4c36ddbe AT |
926 | writefd_unbuffered(fd, buf, len); |
927 | return; | |
928 | } | |
d6dead6b AT |
929 | |
930 | while (len) { | |
7b5c3eb0 | 931 | int n = MIN((int) len, IO_BUFFER_SIZE-io_buffer_count); |
d6dead6b AT |
932 | if (n > 0) { |
933 | memcpy(io_buffer+io_buffer_count, buf, n); | |
934 | buf += n; | |
935 | len -= n; | |
936 | io_buffer_count += n; | |
937 | } | |
3151cbae | 938 | |
d17e1dd2 WD |
939 | if (io_buffer_count == IO_BUFFER_SIZE) |
940 | io_flush(NORMAL_FLUSH); | |
d6dead6b | 941 | } |
d6dead6b | 942 | } |
720b47f2 AT |
943 | |
944 | ||
b7922338 | 945 | void write_int(int f,int32 x) |
720b47f2 | 946 | { |
8d9dc9f9 AT |
947 | char b[4]; |
948 | SIVAL(b,0,x); | |
4c36ddbe | 949 | writefd(f,b,4); |
720b47f2 AT |
950 | } |
951 | ||
7a24c346 | 952 | |
805edf9d MP |
953 | void write_int_named(int f, int32 x, const char *phase) |
954 | { | |
955 | io_write_phase = phase; | |
956 | write_int(f, x); | |
957 | io_write_phase = phase_unknown; | |
958 | } | |
959 | ||
960 | ||
7a24c346 MP |
961 | /* |
962 | * Note: int64 may actually be a 32-bit type if ./configure couldn't find any | |
963 | * 64-bit types on this platform. | |
964 | */ | |
71c46176 | 965 | void write_longint(int f, int64 x) |
3a6a366f | 966 | { |
3a6a366f | 967 | char b[8]; |
3a6a366f | 968 | |
91c4da3f | 969 | if (x <= 0x7FFFFFFF) { |
3a6a366f AT |
970 | write_int(f, (int)x); |
971 | return; | |
972 | } | |
973 | ||
67863f46 S |
974 | #ifdef NO_INT64 |
975 | rprintf(FERROR,"Integer overflow - attempted 64 bit offset\n"); | |
976 | exit_cleanup(RERR_UNSUPPORTED); | |
977 | #else | |
8de330a3 | 978 | write_int(f, (int32)0xFFFFFFFF); |
3a6a366f AT |
979 | SIVAL(b,0,(x&0xFFFFFFFF)); |
980 | SIVAL(b,4,((x>>32)&0xFFFFFFFF)); | |
981 | ||
4c36ddbe | 982 | writefd(f,b,8); |
67863f46 | 983 | #endif |
3a6a366f AT |
984 | } |
985 | ||
9dd891bb | 986 | void write_buf(int f,char *buf,size_t len) |
720b47f2 | 987 | { |
4c36ddbe | 988 | writefd(f,buf,len); |
720b47f2 AT |
989 | } |
990 | ||
880da007 | 991 | /** Write a string to the connection */ |
6e4fb64e | 992 | static void write_sbuf(int f,char *buf) |
f0fca04e AT |
993 | { |
994 | write_buf(f, buf, strlen(buf)); | |
995 | } | |
996 | ||
720b47f2 | 997 | |
182dca5c AT |
998 | void write_byte(int f,unsigned char c) |
999 | { | |
f0fca04e | 1000 | write_buf(f,(char *)&c,1); |
182dca5c AT |
1001 | } |
1002 | ||
7a55d06e MP |
1003 | |
1004 | ||
914cc65c | 1005 | /** |
6ed6d7f5 WD |
1006 | * Read a line of up to @p maxlen characters into @p buf (not counting |
1007 | * the trailing null). Strips the (required) trailing newline and all | |
1008 | * carriage returns. | |
914cc65c | 1009 | * |
6ed6d7f5 | 1010 | * @return 1 for success; 0 for I/O error or truncation. |
914cc65c | 1011 | **/ |
9dd891bb | 1012 | int read_line(int f, char *buf, size_t maxlen) |
f0fca04e AT |
1013 | { |
1014 | while (maxlen) { | |
528bfcd7 | 1015 | buf[0] = 0; |
f0fca04e | 1016 | read_buf(f, buf, 1); |
914cc65c MP |
1017 | if (buf[0] == 0) |
1018 | return 0; | |
6ed6d7f5 | 1019 | if (buf[0] == '\n') |
f0fca04e | 1020 | break; |
f0fca04e AT |
1021 | if (buf[0] != '\r') { |
1022 | buf++; | |
1023 | maxlen--; | |
1024 | } | |
1025 | } | |
6ed6d7f5 WD |
1026 | *buf = '\0'; |
1027 | return maxlen > 0; | |
f0fca04e AT |
1028 | } |
1029 | ||
1030 | ||
1031 | void io_printf(int fd, const char *format, ...) | |
1032 | { | |
d62bcc17 | 1033 | va_list ap; |
f0fca04e AT |
1034 | char buf[1024]; |
1035 | int len; | |
3151cbae | 1036 | |
f0fca04e | 1037 | va_start(ap, format); |
3151cbae | 1038 | len = vsnprintf(buf, sizeof buf, format, ap); |
f0fca04e AT |
1039 | va_end(ap); |
1040 | ||
65417579 | 1041 | if (len < 0) exit_cleanup(RERR_STREAMIO); |
f0fca04e AT |
1042 | |
1043 | write_sbuf(fd, buf); | |
1044 | } | |
8d9dc9f9 AT |
1045 | |
1046 | ||
d17e1dd2 | 1047 | /** Setup for multiplexing a MSG_* stream with the data stream. */ |
8d9dc9f9 AT |
1048 | void io_start_multiplex_out(int fd) |
1049 | { | |
679e7657 | 1050 | multiplex_out_fd = fd; |
d17e1dd2 | 1051 | io_flush(NORMAL_FLUSH); |
76c21947 | 1052 | io_start_buffering_out(fd); |
8d9dc9f9 AT |
1053 | io_multiplexing_out = 1; |
1054 | } | |
1055 | ||
d17e1dd2 | 1056 | /** Setup for multiplexing a MSG_* stream with the data stream. */ |
8d9dc9f9 AT |
1057 | void io_start_multiplex_in(int fd) |
1058 | { | |
679e7657 | 1059 | multiplex_in_fd = fd; |
d17e1dd2 | 1060 | io_flush(NORMAL_FLUSH); |
8d9dc9f9 AT |
1061 | io_multiplexing_in = 1; |
1062 | } | |
1063 | ||
d17e1dd2 WD |
1064 | /** Write an message to the multiplexed data stream. */ |
1065 | int io_multiplex_write(enum msgcode code, char *buf, size_t len) | |
8d9dc9f9 AT |
1066 | { |
1067 | if (!io_multiplexing_out) return 0; | |
1068 | ||
d17e1dd2 | 1069 | io_flush(NORMAL_FLUSH); |
1b7c47cb | 1070 | stats.total_written += (len+4); |
ff41a59f | 1071 | mplex_write(multiplex_out_fd, code, buf, len); |
8d9dc9f9 AT |
1072 | return 1; |
1073 | } | |
1074 | ||
d17e1dd2 | 1075 | /** Stop output multiplexing. */ |
554e0a8d AT |
1076 | void io_multiplexing_close(void) |
1077 | { | |
1078 | io_multiplexing_out = 0; | |
1079 | } | |
1080 |