Commit | Line | Data |
---|---|---|
720b47f2 AT |
1 | /* |
2 | Copyright (C) Andrew Tridgell 1996 | |
3 | Copyright (C) Paul Mackerras 1996 | |
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 the | |
13 | 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., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | */ | |
19 | ||
20 | /* | |
08f15335 | 21 | socket and pipe IO utilities used in rsync |
720b47f2 AT |
22 | |
23 | tridge, June 1996 | |
24 | */ | |
25 | #include "rsync.h" | |
26 | ||
8cd9fd4e AT |
27 | /* if no timeout is specified then use a 60 second select timeout */ |
28 | #define SELECT_TIMEOUT 60 | |
29 | ||
8d9dc9f9 AT |
30 | static int io_multiplexing_out; |
31 | static int io_multiplexing_in; | |
679e7657 AT |
32 | static int multiplex_in_fd; |
33 | static int multiplex_out_fd; | |
8d9dc9f9 | 34 | static time_t last_io; |
528bfcd7 | 35 | static int eof_error=1; |
720b47f2 | 36 | extern int verbose; |
6ba9279f | 37 | extern int io_timeout; |
a800434a | 38 | extern struct stats stats; |
720b47f2 AT |
39 | |
40 | static int buffer_f_in = -1; | |
554e0a8d | 41 | static int io_error_fd = -1; |
720b47f2 | 42 | |
ff41a59f AT |
43 | static void read_loop(int fd, char *buf, int len); |
44 | ||
4c36ddbe | 45 | void setup_readbuffer(int f_in) |
720b47f2 | 46 | { |
22d6234e | 47 | buffer_f_in = f_in; |
720b47f2 AT |
48 | } |
49 | ||
8d9dc9f9 AT |
50 | static void check_timeout(void) |
51 | { | |
52 | time_t t; | |
53 | ||
54 | if (!io_timeout) return; | |
55 | ||
56 | if (!last_io) { | |
57 | last_io = time(NULL); | |
58 | return; | |
59 | } | |
60 | ||
61 | t = time(NULL); | |
62 | ||
86ffe37f AT |
63 | if (last_io && io_timeout && (t-last_io) >= io_timeout) { |
64 | rprintf(FERROR,"io timeout after %d second - exiting\n", | |
8d9dc9f9 | 65 | (int)(t-last_io)); |
65417579 | 66 | exit_cleanup(RERR_TIMEOUT); |
8d9dc9f9 AT |
67 | } |
68 | } | |
69 | ||
554e0a8d AT |
70 | /* setup the fd used to propogate errors */ |
71 | void io_set_error_fd(int fd) | |
72 | { | |
73 | io_error_fd = fd; | |
74 | } | |
75 | ||
ff41a59f | 76 | /* read some data from the error fd and write it to the write log code */ |
554e0a8d AT |
77 | static void read_error_fd(void) |
78 | { | |
79 | char buf[200]; | |
80 | int n; | |
81 | int fd = io_error_fd; | |
ff41a59f AT |
82 | int tag, len; |
83 | ||
554e0a8d AT |
84 | io_error_fd = -1; |
85 | ||
ff41a59f AT |
86 | read_loop(fd, buf, 4); |
87 | tag = IVAL(buf, 0); | |
88 | ||
89 | len = tag & 0xFFFFFF; | |
90 | tag = tag >> 24; | |
91 | tag -= MPLEX_BASE; | |
92 | ||
93 | while (len) { | |
94 | n = len; | |
95 | if (n > (sizeof(buf)-1)) n = sizeof(buf)-1; | |
96 | read_loop(fd, buf, n); | |
97 | rwrite((enum logcode)tag, buf, n); | |
98 | len -= n; | |
554e0a8d AT |
99 | } |
100 | ||
101 | io_error_fd = fd; | |
102 | } | |
103 | ||
720b47f2 | 104 | |
e44f9a12 | 105 | static int no_flush; |
720b47f2 | 106 | |
4c36ddbe AT |
107 | /* read from a socket with IO timeout. return the number of |
108 | bytes read. If no bytes can be read then exit, never return | |
109 | a number <= 0 */ | |
110 | static int read_timeout(int fd, char *buf, int len) | |
8d9dc9f9 | 111 | { |
4c36ddbe AT |
112 | int n, ret=0; |
113 | ||
ea2111d1 AT |
114 | io_flush(); |
115 | ||
4c36ddbe AT |
116 | while (ret == 0) { |
117 | fd_set fds; | |
118 | struct timeval tv; | |
554e0a8d | 119 | int fd_count = fd+1; |
4c36ddbe AT |
120 | |
121 | FD_ZERO(&fds); | |
122 | FD_SET(fd, &fds); | |
554e0a8d AT |
123 | if (io_error_fd != -1) { |
124 | FD_SET(io_error_fd, &fds); | |
125 | if (io_error_fd > fd) fd_count = io_error_fd+1; | |
126 | } | |
127 | ||
8cd9fd4e | 128 | tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT; |
4c36ddbe AT |
129 | tv.tv_usec = 0; |
130 | ||
554e0a8d AT |
131 | errno = 0; |
132 | ||
133 | if (select(fd_count, &fds, NULL, NULL, &tv) < 1) { | |
134 | if (errno == EBADF) { | |
135 | exit_cleanup(RERR_SOCKETIO); | |
136 | } | |
4c36ddbe AT |
137 | check_timeout(); |
138 | continue; | |
139 | } | |
140 | ||
554e0a8d AT |
141 | if (io_error_fd != -1 && FD_ISSET(io_error_fd, &fds)) { |
142 | read_error_fd(); | |
143 | } | |
144 | ||
145 | if (!FD_ISSET(fd, &fds)) continue; | |
146 | ||
4c36ddbe AT |
147 | n = read(fd, buf, len); |
148 | ||
8d9dc9f9 AT |
149 | if (n > 0) { |
150 | buf += n; | |
151 | len -= n; | |
4c36ddbe AT |
152 | ret += n; |
153 | if (io_timeout) | |
154 | last_io = time(NULL); | |
155 | continue; | |
8d9dc9f9 | 156 | } |
4c36ddbe AT |
157 | |
158 | if (n == -1 && errno == EINTR) { | |
159 | continue; | |
160 | } | |
161 | ||
f0359dd0 AT |
162 | if (n == -1 && |
163 | (errno == EWOULDBLOCK || errno == EAGAIN)) { | |
164 | continue; | |
165 | } | |
166 | ||
5d1e1dcf | 167 | |
8d9dc9f9 | 168 | if (n == 0) { |
528bfcd7 | 169 | if (eof_error) { |
ca8e9694 | 170 | rprintf(FERROR,"unexpected EOF in read_timeout\n"); |
528bfcd7 | 171 | } |
65417579 | 172 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 | 173 | } |
8d9dc9f9 | 174 | |
5d1e1dcf | 175 | /* this prevents us trying to write errors on a dead socket */ |
554e0a8d | 176 | io_multiplexing_close(); |
5d1e1dcf | 177 | |
4c36ddbe | 178 | rprintf(FERROR,"read error: %s\n", strerror(errno)); |
65417579 | 179 | exit_cleanup(RERR_STREAMIO); |
4c36ddbe | 180 | } |
8d9dc9f9 | 181 | |
4c36ddbe AT |
182 | return ret; |
183 | } | |
8d9dc9f9 | 184 | |
4c36ddbe AT |
185 | /* continue trying to read len bytes - don't return until len |
186 | has been read */ | |
187 | static void read_loop(int fd, char *buf, int len) | |
188 | { | |
189 | while (len) { | |
190 | int n = read_timeout(fd, buf, len); | |
191 | ||
192 | buf += n; | |
193 | len -= n; | |
8d9dc9f9 AT |
194 | } |
195 | } | |
196 | ||
cad2bba7 | 197 | /* read from the file descriptor handling multiplexing - |
4c36ddbe AT |
198 | return number of bytes read |
199 | never return <= 0 */ | |
8d9dc9f9 AT |
200 | static int read_unbuffered(int fd, char *buf, int len) |
201 | { | |
202 | static int remaining; | |
8d9dc9f9 AT |
203 | int tag, ret=0; |
204 | char line[1024]; | |
205 | ||
679e7657 | 206 | if (!io_multiplexing_in || fd != multiplex_in_fd) |
4c36ddbe | 207 | return read_timeout(fd, buf, len); |
8d9dc9f9 AT |
208 | |
209 | while (ret == 0) { | |
210 | if (remaining) { | |
211 | len = MIN(len, remaining); | |
212 | read_loop(fd, buf, len); | |
213 | remaining -= len; | |
214 | ret = len; | |
215 | continue; | |
216 | } | |
217 | ||
ff41a59f AT |
218 | read_loop(fd, line, 4); |
219 | tag = IVAL(line, 0); | |
679e7657 | 220 | |
8d9dc9f9 AT |
221 | remaining = tag & 0xFFFFFF; |
222 | tag = tag >> 24; | |
223 | ||
224 | if (tag == MPLEX_BASE) continue; | |
225 | ||
226 | tag -= MPLEX_BASE; | |
227 | ||
228 | if (tag != FERROR && tag != FINFO) { | |
229 | rprintf(FERROR,"unexpected tag %d\n", tag); | |
65417579 | 230 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 AT |
231 | } |
232 | ||
233 | if (remaining > sizeof(line)-1) { | |
234 | rprintf(FERROR,"multiplexing overflow %d\n\n", | |
235 | remaining); | |
65417579 | 236 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 AT |
237 | } |
238 | ||
239 | read_loop(fd, line, remaining); | |
240 | line[remaining] = 0; | |
241 | ||
ff41a59f | 242 | rprintf((enum logcode)tag,"%s", line); |
8d9dc9f9 AT |
243 | remaining = 0; |
244 | } | |
245 | ||
246 | return ret; | |
247 | } | |
248 | ||
249 | ||
4c36ddbe AT |
250 | /* do a buffered read from fd. don't return until all N bytes |
251 | have been read. If all N can't be read then exit with an error */ | |
252 | static void readfd(int fd,char *buffer,int N) | |
720b47f2 | 253 | { |
6ba9279f AT |
254 | int ret; |
255 | int total=0; | |
6ba9279f | 256 | |
6ba9279f | 257 | while (total < N) { |
8d9dc9f9 AT |
258 | io_flush(); |
259 | ||
4c36ddbe | 260 | ret = read_unbuffered(fd,buffer + total,N-total); |
6ba9279f | 261 | total += ret; |
7f28dbee | 262 | } |
1b7c47cb AT |
263 | |
264 | stats.total_read += total; | |
720b47f2 AT |
265 | } |
266 | ||
267 | ||
b7922338 | 268 | int32 read_int(int f) |
720b47f2 | 269 | { |
4c36ddbe | 270 | char b[4]; |
d730b113 AT |
271 | int32 ret; |
272 | ||
4c36ddbe | 273 | readfd(f,b,4); |
d730b113 AT |
274 | ret = IVAL(b,0); |
275 | if (ret == (int32)0xffffffff) return -1; | |
276 | return ret; | |
720b47f2 AT |
277 | } |
278 | ||
71c46176 | 279 | int64 read_longint(int f) |
3a6a366f AT |
280 | { |
281 | extern int remote_version; | |
71c46176 | 282 | int64 ret; |
3a6a366f AT |
283 | char b[8]; |
284 | ret = read_int(f); | |
71c46176 | 285 | |
8de330a3 AT |
286 | if ((int32)ret != (int32)0xffffffff) { |
287 | return ret; | |
288 | } | |
71c46176 | 289 | |
3bee6733 | 290 | #ifdef NO_INT64 |
9486289c | 291 | rprintf(FERROR,"Integer overflow - attempted 64 bit offset\n"); |
65417579 | 292 | exit_cleanup(RERR_UNSUPPORTED); |
71c46176 AT |
293 | #else |
294 | if (remote_version >= 16) { | |
4c36ddbe | 295 | readfd(f,b,8); |
71c46176 | 296 | ret = IVAL(b,0) | (((int64)IVAL(b,4))<<32); |
3a6a366f | 297 | } |
71c46176 AT |
298 | #endif |
299 | ||
3a6a366f AT |
300 | return ret; |
301 | } | |
302 | ||
720b47f2 AT |
303 | void read_buf(int f,char *buf,int len) |
304 | { | |
4c36ddbe | 305 | readfd(f,buf,len); |
720b47f2 AT |
306 | } |
307 | ||
575f2fca AT |
308 | void read_sbuf(int f,char *buf,int len) |
309 | { | |
310 | read_buf(f,buf,len); | |
311 | buf[len] = 0; | |
312 | } | |
313 | ||
182dca5c AT |
314 | unsigned char read_byte(int f) |
315 | { | |
4c36ddbe AT |
316 | unsigned char c; |
317 | read_buf(f,(char *)&c,1); | |
318 | return c; | |
182dca5c | 319 | } |
720b47f2 | 320 | |
7bec6a5c | 321 | |
7bec6a5c | 322 | |
4c36ddbe AT |
323 | /* write len bytes to fd, possibly reading from buffer_f_in if set |
324 | in order to unclog the pipe. don't return until all len | |
325 | bytes have been written */ | |
326 | static void writefd_unbuffered(int fd,char *buf,int len) | |
720b47f2 | 327 | { |
8d9dc9f9 AT |
328 | int total = 0; |
329 | fd_set w_fds, r_fds; | |
4c36ddbe | 330 | int fd_count, count; |
8d9dc9f9 | 331 | struct timeval tv; |
720b47f2 | 332 | |
e44f9a12 AT |
333 | no_flush++; |
334 | ||
4c36ddbe | 335 | while (total < len) { |
8d9dc9f9 AT |
336 | FD_ZERO(&w_fds); |
337 | FD_ZERO(&r_fds); | |
338 | FD_SET(fd,&w_fds); | |
554e0a8d | 339 | fd_count = fd; |
4c36ddbe | 340 | |
554e0a8d AT |
341 | if (io_error_fd != -1) { |
342 | FD_SET(io_error_fd,&r_fds); | |
343 | if (io_error_fd > fd_count) | |
344 | fd_count = io_error_fd; | |
8d9dc9f9 AT |
345 | } |
346 | ||
8cd9fd4e | 347 | tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT; |
8d9dc9f9 | 348 | tv.tv_usec = 0; |
4c36ddbe | 349 | |
554e0a8d AT |
350 | errno = 0; |
351 | ||
352 | count = select(fd_count+1, | |
08f15335 | 353 | io_error_fd != -1?&r_fds:NULL, |
4c36ddbe | 354 | &w_fds,NULL, |
8cd9fd4e | 355 | &tv); |
4c36ddbe AT |
356 | |
357 | if (count <= 0) { | |
554e0a8d AT |
358 | if (errno == EBADF) { |
359 | exit_cleanup(RERR_SOCKETIO); | |
360 | } | |
8d9dc9f9 AT |
361 | check_timeout(); |
362 | continue; | |
363 | } | |
4c36ddbe | 364 | |
554e0a8d AT |
365 | if (io_error_fd != -1 && FD_ISSET(io_error_fd, &r_fds)) { |
366 | read_error_fd(); | |
367 | } | |
368 | ||
8d9dc9f9 | 369 | if (FD_ISSET(fd, &w_fds)) { |
07b7c86c AT |
370 | int ret, n = len-total; |
371 | ||
f0359dd0 | 372 | ret = write(fd,buf+total,n); |
4c36ddbe AT |
373 | |
374 | if (ret == -1 && errno == EINTR) { | |
375 | continue; | |
376 | } | |
377 | ||
f0359dd0 AT |
378 | if (ret == -1 && |
379 | (errno == EWOULDBLOCK || errno == EAGAIN)) { | |
380 | continue; | |
381 | } | |
382 | ||
4c36ddbe AT |
383 | if (ret <= 0) { |
384 | rprintf(FERROR,"erroring writing %d bytes - exiting\n", len); | |
65417579 | 385 | exit_cleanup(RERR_STREAMIO); |
4c36ddbe AT |
386 | } |
387 | ||
388 | total += ret; | |
a800434a | 389 | |
4c36ddbe AT |
390 | if (io_timeout) |
391 | last_io = time(NULL); | |
8d9dc9f9 | 392 | } |
4c36ddbe | 393 | } |
e44f9a12 AT |
394 | |
395 | no_flush--; | |
720b47f2 AT |
396 | } |
397 | ||
8d9dc9f9 | 398 | |
d6dead6b AT |
399 | static char *io_buffer; |
400 | static int io_buffer_count; | |
401 | ||
402 | void io_start_buffering(int fd) | |
403 | { | |
8d9dc9f9 | 404 | if (io_buffer) return; |
679e7657 | 405 | multiplex_out_fd = fd; |
ff41a59f | 406 | io_buffer = (char *)malloc(IO_BUFFER_SIZE); |
d6dead6b AT |
407 | if (!io_buffer) out_of_memory("writefd"); |
408 | io_buffer_count = 0; | |
ff41a59f AT |
409 | } |
410 | ||
411 | /* write an message to a multiplexed stream. If this fails then rsync | |
412 | exits */ | |
413 | static void mplex_write(int fd, enum logcode code, char *buf, int len) | |
414 | { | |
415 | char buffer[4096]; | |
416 | int n = len; | |
8d9dc9f9 | 417 | |
ff41a59f AT |
418 | SIVAL(buffer, 0, ((MPLEX_BASE + (int)code)<<24) + len); |
419 | ||
6d7b6081 AT |
420 | if (n > (sizeof(buffer)-4)) { |
421 | n = sizeof(buffer)-4; | |
ff41a59f AT |
422 | } |
423 | ||
424 | memcpy(&buffer[4], buf, n); | |
425 | writefd_unbuffered(fd, buffer, n+4); | |
426 | ||
427 | len -= n; | |
428 | buf += n; | |
429 | ||
6d7b6081 AT |
430 | if (len) { |
431 | writefd_unbuffered(fd, buf, len); | |
432 | } | |
d6dead6b AT |
433 | } |
434 | ||
ff41a59f | 435 | |
8d9dc9f9 | 436 | void io_flush(void) |
d6dead6b | 437 | { |
679e7657 | 438 | int fd = multiplex_out_fd; |
e44f9a12 | 439 | if (!io_buffer_count || no_flush) return; |
8d9dc9f9 AT |
440 | |
441 | if (io_multiplexing_out) { | |
0f3203c3 | 442 | mplex_write(fd, FNONE, io_buffer, io_buffer_count); |
8d9dc9f9 | 443 | } else { |
4c36ddbe | 444 | writefd_unbuffered(fd, io_buffer, io_buffer_count); |
d6dead6b | 445 | } |
8d9dc9f9 AT |
446 | io_buffer_count = 0; |
447 | } | |
448 | ||
449 | void io_end_buffering(int fd) | |
450 | { | |
451 | io_flush(); | |
452 | if (!io_multiplexing_out) { | |
ff41a59f | 453 | free(io_buffer); |
8d9dc9f9 AT |
454 | io_buffer = NULL; |
455 | } | |
d6dead6b AT |
456 | } |
457 | ||
4c36ddbe | 458 | static void writefd(int fd,char *buf,int len) |
d6dead6b | 459 | { |
1b7c47cb AT |
460 | stats.total_written += len; |
461 | ||
554e0a8d | 462 | if (!io_buffer || fd != multiplex_out_fd) { |
4c36ddbe AT |
463 | writefd_unbuffered(fd, buf, len); |
464 | return; | |
465 | } | |
d6dead6b AT |
466 | |
467 | while (len) { | |
468 | int n = MIN(len, IO_BUFFER_SIZE-io_buffer_count); | |
469 | if (n > 0) { | |
470 | memcpy(io_buffer+io_buffer_count, buf, n); | |
471 | buf += n; | |
472 | len -= n; | |
473 | io_buffer_count += n; | |
474 | } | |
475 | ||
8d9dc9f9 | 476 | if (io_buffer_count == IO_BUFFER_SIZE) io_flush(); |
d6dead6b | 477 | } |
d6dead6b | 478 | } |
720b47f2 AT |
479 | |
480 | ||
b7922338 | 481 | void write_int(int f,int32 x) |
720b47f2 | 482 | { |
8d9dc9f9 AT |
483 | char b[4]; |
484 | SIVAL(b,0,x); | |
4c36ddbe | 485 | writefd(f,b,4); |
720b47f2 AT |
486 | } |
487 | ||
71c46176 | 488 | void write_longint(int f, int64 x) |
3a6a366f AT |
489 | { |
490 | extern int remote_version; | |
491 | char b[8]; | |
3a6a366f AT |
492 | |
493 | if (remote_version < 16 || x <= 0x7FFFFFFF) { | |
494 | write_int(f, (int)x); | |
495 | return; | |
496 | } | |
497 | ||
8de330a3 | 498 | write_int(f, (int32)0xFFFFFFFF); |
3a6a366f AT |
499 | SIVAL(b,0,(x&0xFFFFFFFF)); |
500 | SIVAL(b,4,((x>>32)&0xFFFFFFFF)); | |
501 | ||
4c36ddbe | 502 | writefd(f,b,8); |
3a6a366f AT |
503 | } |
504 | ||
720b47f2 AT |
505 | void write_buf(int f,char *buf,int len) |
506 | { | |
4c36ddbe | 507 | writefd(f,buf,len); |
720b47f2 AT |
508 | } |
509 | ||
f0fca04e | 510 | /* write a string to the connection */ |
6e4fb64e | 511 | static void write_sbuf(int f,char *buf) |
f0fca04e AT |
512 | { |
513 | write_buf(f, buf, strlen(buf)); | |
514 | } | |
515 | ||
720b47f2 | 516 | |
182dca5c AT |
517 | void write_byte(int f,unsigned char c) |
518 | { | |
f0fca04e | 519 | write_buf(f,(char *)&c,1); |
182dca5c AT |
520 | } |
521 | ||
f0fca04e AT |
522 | int read_line(int f, char *buf, int maxlen) |
523 | { | |
528bfcd7 AT |
524 | eof_error = 0; |
525 | ||
f0fca04e | 526 | while (maxlen) { |
528bfcd7 | 527 | buf[0] = 0; |
f0fca04e | 528 | read_buf(f, buf, 1); |
528bfcd7 | 529 | if (buf[0] == 0) return 0; |
f0fca04e AT |
530 | if (buf[0] == '\n') { |
531 | buf[0] = 0; | |
532 | break; | |
533 | } | |
534 | if (buf[0] != '\r') { | |
535 | buf++; | |
536 | maxlen--; | |
537 | } | |
538 | } | |
539 | if (maxlen == 0) { | |
540 | *buf = 0; | |
541 | return 0; | |
542 | } | |
528bfcd7 AT |
543 | |
544 | eof_error = 1; | |
545 | ||
f0fca04e AT |
546 | return 1; |
547 | } | |
548 | ||
549 | ||
550 | void io_printf(int fd, const char *format, ...) | |
551 | { | |
552 | va_list ap; | |
553 | char buf[1024]; | |
554 | int len; | |
555 | ||
556 | va_start(ap, format); | |
37f9805d | 557 | len = vslprintf(buf, sizeof(buf), format, ap); |
f0fca04e AT |
558 | va_end(ap); |
559 | ||
65417579 | 560 | if (len < 0) exit_cleanup(RERR_STREAMIO); |
f0fca04e AT |
561 | |
562 | write_sbuf(fd, buf); | |
563 | } | |
8d9dc9f9 AT |
564 | |
565 | ||
566 | /* setup for multiplexing an error stream with the data stream */ | |
567 | void io_start_multiplex_out(int fd) | |
568 | { | |
679e7657 AT |
569 | multiplex_out_fd = fd; |
570 | io_flush(); | |
8d9dc9f9 AT |
571 | io_start_buffering(fd); |
572 | io_multiplexing_out = 1; | |
573 | } | |
574 | ||
575 | /* setup for multiplexing an error stream with the data stream */ | |
576 | void io_start_multiplex_in(int fd) | |
577 | { | |
679e7657 AT |
578 | multiplex_in_fd = fd; |
579 | io_flush(); | |
8d9dc9f9 AT |
580 | io_multiplexing_in = 1; |
581 | } | |
582 | ||
554e0a8d | 583 | /* write an message to the multiplexed error stream */ |
ff41a59f | 584 | int io_multiplex_write(enum logcode code, char *buf, int len) |
8d9dc9f9 AT |
585 | { |
586 | if (!io_multiplexing_out) return 0; | |
587 | ||
588 | io_flush(); | |
1b7c47cb | 589 | stats.total_written += (len+4); |
ff41a59f | 590 | mplex_write(multiplex_out_fd, code, buf, len); |
8d9dc9f9 AT |
591 | return 1; |
592 | } | |
593 | ||
554e0a8d | 594 | /* write a message to the special error fd */ |
ff41a59f | 595 | int io_error_write(int f, enum logcode code, char *buf, int len) |
554e0a8d AT |
596 | { |
597 | if (f == -1) return 0; | |
ff41a59f | 598 | mplex_write(f, code, buf, len); |
554e0a8d AT |
599 | return 1; |
600 | } | |
601 | ||
602 | /* stop output multiplexing */ | |
603 | void io_multiplexing_close(void) | |
604 | { | |
605 | io_multiplexing_out = 0; | |
606 | } | |
607 | ||
8d9dc9f9 AT |
608 | void io_close_input(int fd) |
609 | { | |
610 | buffer_f_in = -1; | |
611 | } | |
8b35435f | 612 |