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 | ||
ef5d23eb DD |
30 | extern int bwlimit; |
31 | ||
8d9dc9f9 AT |
32 | static int io_multiplexing_out; |
33 | static int io_multiplexing_in; | |
679e7657 AT |
34 | static int multiplex_in_fd; |
35 | static int multiplex_out_fd; | |
8d9dc9f9 | 36 | static time_t last_io; |
528bfcd7 | 37 | static int eof_error=1; |
720b47f2 | 38 | extern int verbose; |
6ba9279f | 39 | extern int io_timeout; |
a800434a | 40 | extern struct stats stats; |
720b47f2 AT |
41 | |
42 | static int buffer_f_in = -1; | |
554e0a8d | 43 | static int io_error_fd = -1; |
720b47f2 | 44 | |
ff41a59f AT |
45 | static void read_loop(int fd, char *buf, int len); |
46 | ||
4c36ddbe | 47 | void setup_readbuffer(int f_in) |
720b47f2 | 48 | { |
22d6234e | 49 | buffer_f_in = f_in; |
720b47f2 AT |
50 | } |
51 | ||
8d9dc9f9 AT |
52 | static void check_timeout(void) |
53 | { | |
0adb99b9 | 54 | extern int am_server, am_daemon; |
8d9dc9f9 AT |
55 | time_t t; |
56 | ||
57 | if (!io_timeout) return; | |
58 | ||
59 | if (!last_io) { | |
60 | last_io = time(NULL); | |
61 | return; | |
62 | } | |
63 | ||
64 | t = time(NULL); | |
65 | ||
86ffe37f | 66 | if (last_io && io_timeout && (t-last_io) >= io_timeout) { |
0adb99b9 AT |
67 | if (!am_server && !am_daemon) { |
68 | rprintf(FERROR,"io timeout after %d second - exiting\n", | |
69 | (int)(t-last_io)); | |
70 | } | |
65417579 | 71 | exit_cleanup(RERR_TIMEOUT); |
8d9dc9f9 AT |
72 | } |
73 | } | |
74 | ||
554e0a8d AT |
75 | /* setup the fd used to propogate errors */ |
76 | void io_set_error_fd(int fd) | |
77 | { | |
78 | io_error_fd = fd; | |
79 | } | |
80 | ||
ff41a59f | 81 | /* read some data from the error fd and write it to the write log code */ |
554e0a8d AT |
82 | static void read_error_fd(void) |
83 | { | |
84 | char buf[200]; | |
85 | int n; | |
86 | int fd = io_error_fd; | |
ff41a59f AT |
87 | int tag, len; |
88 | ||
554e0a8d AT |
89 | io_error_fd = -1; |
90 | ||
ff41a59f AT |
91 | read_loop(fd, buf, 4); |
92 | tag = IVAL(buf, 0); | |
93 | ||
94 | len = tag & 0xFFFFFF; | |
95 | tag = tag >> 24; | |
96 | tag -= MPLEX_BASE; | |
97 | ||
98 | while (len) { | |
99 | n = len; | |
100 | if (n > (sizeof(buf)-1)) n = sizeof(buf)-1; | |
101 | read_loop(fd, buf, n); | |
102 | rwrite((enum logcode)tag, buf, n); | |
103 | len -= n; | |
554e0a8d AT |
104 | } |
105 | ||
106 | io_error_fd = fd; | |
107 | } | |
108 | ||
720b47f2 | 109 | |
e44f9a12 | 110 | static int no_flush; |
720b47f2 | 111 | |
4c36ddbe AT |
112 | /* read from a socket with IO timeout. return the number of |
113 | bytes read. If no bytes can be read then exit, never return | |
114 | a number <= 0 */ | |
115 | static int read_timeout(int fd, char *buf, int len) | |
8d9dc9f9 | 116 | { |
4c36ddbe AT |
117 | int n, ret=0; |
118 | ||
ea2111d1 AT |
119 | io_flush(); |
120 | ||
4c36ddbe AT |
121 | while (ret == 0) { |
122 | fd_set fds; | |
123 | struct timeval tv; | |
554e0a8d | 124 | int fd_count = fd+1; |
4c36ddbe AT |
125 | |
126 | FD_ZERO(&fds); | |
127 | FD_SET(fd, &fds); | |
554e0a8d AT |
128 | if (io_error_fd != -1) { |
129 | FD_SET(io_error_fd, &fds); | |
130 | if (io_error_fd > fd) fd_count = io_error_fd+1; | |
131 | } | |
132 | ||
8cd9fd4e | 133 | tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT; |
4c36ddbe AT |
134 | tv.tv_usec = 0; |
135 | ||
554e0a8d AT |
136 | errno = 0; |
137 | ||
138 | if (select(fd_count, &fds, NULL, NULL, &tv) < 1) { | |
139 | if (errno == EBADF) { | |
140 | exit_cleanup(RERR_SOCKETIO); | |
141 | } | |
4c36ddbe AT |
142 | check_timeout(); |
143 | continue; | |
144 | } | |
145 | ||
554e0a8d AT |
146 | if (io_error_fd != -1 && FD_ISSET(io_error_fd, &fds)) { |
147 | read_error_fd(); | |
148 | } | |
149 | ||
150 | if (!FD_ISSET(fd, &fds)) continue; | |
151 | ||
4c36ddbe AT |
152 | n = read(fd, buf, len); |
153 | ||
8d9dc9f9 AT |
154 | if (n > 0) { |
155 | buf += n; | |
156 | len -= n; | |
4c36ddbe AT |
157 | ret += n; |
158 | if (io_timeout) | |
159 | last_io = time(NULL); | |
160 | continue; | |
8d9dc9f9 | 161 | } |
4c36ddbe AT |
162 | |
163 | if (n == -1 && errno == EINTR) { | |
164 | continue; | |
165 | } | |
166 | ||
f0359dd0 AT |
167 | if (n == -1 && |
168 | (errno == EWOULDBLOCK || errno == EAGAIN)) { | |
169 | continue; | |
170 | } | |
171 | ||
5d1e1dcf | 172 | |
8d9dc9f9 | 173 | if (n == 0) { |
528bfcd7 | 174 | if (eof_error) { |
ca8e9694 | 175 | rprintf(FERROR,"unexpected EOF in read_timeout\n"); |
528bfcd7 | 176 | } |
65417579 | 177 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 | 178 | } |
8d9dc9f9 | 179 | |
5d1e1dcf | 180 | /* this prevents us trying to write errors on a dead socket */ |
554e0a8d | 181 | io_multiplexing_close(); |
5d1e1dcf | 182 | |
4c36ddbe | 183 | rprintf(FERROR,"read error: %s\n", strerror(errno)); |
65417579 | 184 | exit_cleanup(RERR_STREAMIO); |
4c36ddbe | 185 | } |
8d9dc9f9 | 186 | |
4c36ddbe AT |
187 | return ret; |
188 | } | |
8d9dc9f9 | 189 | |
4c36ddbe AT |
190 | /* continue trying to read len bytes - don't return until len |
191 | has been read */ | |
192 | static void read_loop(int fd, char *buf, int len) | |
193 | { | |
194 | while (len) { | |
195 | int n = read_timeout(fd, buf, len); | |
196 | ||
197 | buf += n; | |
198 | len -= n; | |
8d9dc9f9 AT |
199 | } |
200 | } | |
201 | ||
cad2bba7 | 202 | /* read from the file descriptor handling multiplexing - |
4c36ddbe AT |
203 | return number of bytes read |
204 | never return <= 0 */ | |
8d9dc9f9 AT |
205 | static int read_unbuffered(int fd, char *buf, int len) |
206 | { | |
207 | static int remaining; | |
8d9dc9f9 AT |
208 | int tag, ret=0; |
209 | char line[1024]; | |
210 | ||
679e7657 | 211 | if (!io_multiplexing_in || fd != multiplex_in_fd) |
4c36ddbe | 212 | return read_timeout(fd, buf, len); |
8d9dc9f9 AT |
213 | |
214 | while (ret == 0) { | |
215 | if (remaining) { | |
216 | len = MIN(len, remaining); | |
217 | read_loop(fd, buf, len); | |
218 | remaining -= len; | |
219 | ret = len; | |
220 | continue; | |
221 | } | |
222 | ||
ff41a59f AT |
223 | read_loop(fd, line, 4); |
224 | tag = IVAL(line, 0); | |
679e7657 | 225 | |
8d9dc9f9 AT |
226 | remaining = tag & 0xFFFFFF; |
227 | tag = tag >> 24; | |
228 | ||
229 | if (tag == MPLEX_BASE) continue; | |
230 | ||
231 | tag -= MPLEX_BASE; | |
232 | ||
233 | if (tag != FERROR && tag != FINFO) { | |
234 | rprintf(FERROR,"unexpected tag %d\n", tag); | |
65417579 | 235 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 AT |
236 | } |
237 | ||
238 | if (remaining > sizeof(line)-1) { | |
239 | rprintf(FERROR,"multiplexing overflow %d\n\n", | |
240 | remaining); | |
65417579 | 241 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 AT |
242 | } |
243 | ||
244 | read_loop(fd, line, remaining); | |
245 | line[remaining] = 0; | |
246 | ||
ff41a59f | 247 | rprintf((enum logcode)tag,"%s", line); |
8d9dc9f9 AT |
248 | remaining = 0; |
249 | } | |
250 | ||
251 | return ret; | |
252 | } | |
253 | ||
254 | ||
4c36ddbe AT |
255 | /* do a buffered read from fd. don't return until all N bytes |
256 | have been read. If all N can't be read then exit with an error */ | |
257 | static void readfd(int fd,char *buffer,int N) | |
720b47f2 | 258 | { |
6ba9279f AT |
259 | int ret; |
260 | int total=0; | |
6ba9279f | 261 | |
6ba9279f | 262 | while (total < N) { |
8d9dc9f9 AT |
263 | io_flush(); |
264 | ||
4c36ddbe | 265 | ret = read_unbuffered(fd,buffer + total,N-total); |
6ba9279f | 266 | total += ret; |
7f28dbee | 267 | } |
1b7c47cb AT |
268 | |
269 | stats.total_read += total; | |
720b47f2 AT |
270 | } |
271 | ||
272 | ||
b7922338 | 273 | int32 read_int(int f) |
720b47f2 | 274 | { |
4c36ddbe | 275 | char b[4]; |
d730b113 AT |
276 | int32 ret; |
277 | ||
4c36ddbe | 278 | readfd(f,b,4); |
d730b113 AT |
279 | ret = IVAL(b,0); |
280 | if (ret == (int32)0xffffffff) return -1; | |
281 | return ret; | |
720b47f2 AT |
282 | } |
283 | ||
71c46176 | 284 | int64 read_longint(int f) |
3a6a366f AT |
285 | { |
286 | extern int remote_version; | |
71c46176 | 287 | int64 ret; |
3a6a366f AT |
288 | char b[8]; |
289 | ret = read_int(f); | |
71c46176 | 290 | |
8de330a3 AT |
291 | if ((int32)ret != (int32)0xffffffff) { |
292 | return ret; | |
293 | } | |
71c46176 | 294 | |
3bee6733 | 295 | #ifdef NO_INT64 |
9486289c | 296 | rprintf(FERROR,"Integer overflow - attempted 64 bit offset\n"); |
65417579 | 297 | exit_cleanup(RERR_UNSUPPORTED); |
71c46176 AT |
298 | #else |
299 | if (remote_version >= 16) { | |
4c36ddbe | 300 | readfd(f,b,8); |
71c46176 | 301 | ret = IVAL(b,0) | (((int64)IVAL(b,4))<<32); |
3a6a366f | 302 | } |
71c46176 AT |
303 | #endif |
304 | ||
3a6a366f AT |
305 | return ret; |
306 | } | |
307 | ||
720b47f2 AT |
308 | void read_buf(int f,char *buf,int len) |
309 | { | |
4c36ddbe | 310 | readfd(f,buf,len); |
720b47f2 AT |
311 | } |
312 | ||
575f2fca AT |
313 | void read_sbuf(int f,char *buf,int len) |
314 | { | |
315 | read_buf(f,buf,len); | |
316 | buf[len] = 0; | |
317 | } | |
318 | ||
182dca5c AT |
319 | unsigned char read_byte(int f) |
320 | { | |
4c36ddbe AT |
321 | unsigned char c; |
322 | read_buf(f,(char *)&c,1); | |
323 | return c; | |
182dca5c | 324 | } |
720b47f2 | 325 | |
7bec6a5c | 326 | |
7bec6a5c | 327 | |
4c36ddbe AT |
328 | /* write len bytes to fd, possibly reading from buffer_f_in if set |
329 | in order to unclog the pipe. don't return until all len | |
330 | bytes have been written */ | |
331 | static void writefd_unbuffered(int fd,char *buf,int len) | |
720b47f2 | 332 | { |
8d9dc9f9 AT |
333 | int total = 0; |
334 | fd_set w_fds, r_fds; | |
4c36ddbe | 335 | int fd_count, count; |
8d9dc9f9 | 336 | struct timeval tv; |
720b47f2 | 337 | |
e44f9a12 AT |
338 | no_flush++; |
339 | ||
4c36ddbe | 340 | while (total < len) { |
8d9dc9f9 AT |
341 | FD_ZERO(&w_fds); |
342 | FD_ZERO(&r_fds); | |
343 | FD_SET(fd,&w_fds); | |
554e0a8d | 344 | fd_count = fd; |
4c36ddbe | 345 | |
554e0a8d AT |
346 | if (io_error_fd != -1) { |
347 | FD_SET(io_error_fd,&r_fds); | |
348 | if (io_error_fd > fd_count) | |
349 | fd_count = io_error_fd; | |
8d9dc9f9 AT |
350 | } |
351 | ||
8cd9fd4e | 352 | tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT; |
8d9dc9f9 | 353 | tv.tv_usec = 0; |
4c36ddbe | 354 | |
554e0a8d AT |
355 | errno = 0; |
356 | ||
357 | count = select(fd_count+1, | |
08f15335 | 358 | io_error_fd != -1?&r_fds:NULL, |
4c36ddbe | 359 | &w_fds,NULL, |
8cd9fd4e | 360 | &tv); |
4c36ddbe AT |
361 | |
362 | if (count <= 0) { | |
554e0a8d AT |
363 | if (errno == EBADF) { |
364 | exit_cleanup(RERR_SOCKETIO); | |
365 | } | |
8d9dc9f9 AT |
366 | check_timeout(); |
367 | continue; | |
368 | } | |
4c36ddbe | 369 | |
554e0a8d AT |
370 | if (io_error_fd != -1 && FD_ISSET(io_error_fd, &r_fds)) { |
371 | read_error_fd(); | |
372 | } | |
373 | ||
8d9dc9f9 | 374 | if (FD_ISSET(fd, &w_fds)) { |
07b7c86c AT |
375 | int ret, n = len-total; |
376 | ||
f0359dd0 | 377 | ret = write(fd,buf+total,n); |
4c36ddbe AT |
378 | |
379 | if (ret == -1 && errno == EINTR) { | |
380 | continue; | |
381 | } | |
382 | ||
f0359dd0 AT |
383 | if (ret == -1 && |
384 | (errno == EWOULDBLOCK || errno == EAGAIN)) { | |
385 | continue; | |
386 | } | |
387 | ||
4c36ddbe AT |
388 | if (ret <= 0) { |
389 | rprintf(FERROR,"erroring writing %d bytes - exiting\n", len); | |
65417579 | 390 | exit_cleanup(RERR_STREAMIO); |
4c36ddbe AT |
391 | } |
392 | ||
ef5d23eb DD |
393 | /* Sleep after writing to limit I/O bandwidth */ |
394 | if (bwlimit) | |
395 | { | |
396 | tv.tv_sec = 0; | |
397 | tv.tv_usec = ret * 1000 / bwlimit; | |
398 | while (tv.tv_usec > 1000000) | |
399 | { | |
400 | tv.tv_sec++; | |
401 | tv.tv_usec -= 1000000; | |
402 | } | |
403 | select(0, NULL, NULL, NULL, &tv); | |
404 | } | |
405 | ||
4c36ddbe | 406 | total += ret; |
a800434a | 407 | |
4c36ddbe AT |
408 | if (io_timeout) |
409 | last_io = time(NULL); | |
8d9dc9f9 | 410 | } |
4c36ddbe | 411 | } |
e44f9a12 AT |
412 | |
413 | no_flush--; | |
720b47f2 AT |
414 | } |
415 | ||
8d9dc9f9 | 416 | |
d6dead6b AT |
417 | static char *io_buffer; |
418 | static int io_buffer_count; | |
419 | ||
420 | void io_start_buffering(int fd) | |
421 | { | |
8d9dc9f9 | 422 | if (io_buffer) return; |
679e7657 | 423 | multiplex_out_fd = fd; |
ff41a59f | 424 | io_buffer = (char *)malloc(IO_BUFFER_SIZE); |
d6dead6b AT |
425 | if (!io_buffer) out_of_memory("writefd"); |
426 | io_buffer_count = 0; | |
ff41a59f AT |
427 | } |
428 | ||
429 | /* write an message to a multiplexed stream. If this fails then rsync | |
430 | exits */ | |
431 | static void mplex_write(int fd, enum logcode code, char *buf, int len) | |
432 | { | |
433 | char buffer[4096]; | |
434 | int n = len; | |
8d9dc9f9 | 435 | |
ff41a59f AT |
436 | SIVAL(buffer, 0, ((MPLEX_BASE + (int)code)<<24) + len); |
437 | ||
6d7b6081 AT |
438 | if (n > (sizeof(buffer)-4)) { |
439 | n = sizeof(buffer)-4; | |
ff41a59f AT |
440 | } |
441 | ||
442 | memcpy(&buffer[4], buf, n); | |
443 | writefd_unbuffered(fd, buffer, n+4); | |
444 | ||
445 | len -= n; | |
446 | buf += n; | |
447 | ||
6d7b6081 AT |
448 | if (len) { |
449 | writefd_unbuffered(fd, buf, len); | |
450 | } | |
d6dead6b AT |
451 | } |
452 | ||
ff41a59f | 453 | |
8d9dc9f9 | 454 | void io_flush(void) |
d6dead6b | 455 | { |
679e7657 | 456 | int fd = multiplex_out_fd; |
e44f9a12 | 457 | if (!io_buffer_count || no_flush) return; |
8d9dc9f9 AT |
458 | |
459 | if (io_multiplexing_out) { | |
0f3203c3 | 460 | mplex_write(fd, FNONE, io_buffer, io_buffer_count); |
8d9dc9f9 | 461 | } else { |
4c36ddbe | 462 | writefd_unbuffered(fd, io_buffer, io_buffer_count); |
d6dead6b | 463 | } |
8d9dc9f9 AT |
464 | io_buffer_count = 0; |
465 | } | |
466 | ||
467 | void io_end_buffering(int fd) | |
468 | { | |
469 | io_flush(); | |
470 | if (!io_multiplexing_out) { | |
ff41a59f | 471 | free(io_buffer); |
8d9dc9f9 AT |
472 | io_buffer = NULL; |
473 | } | |
d6dead6b AT |
474 | } |
475 | ||
4c36ddbe | 476 | static void writefd(int fd,char *buf,int len) |
d6dead6b | 477 | { |
1b7c47cb AT |
478 | stats.total_written += len; |
479 | ||
554e0a8d | 480 | if (!io_buffer || fd != multiplex_out_fd) { |
4c36ddbe AT |
481 | writefd_unbuffered(fd, buf, len); |
482 | return; | |
483 | } | |
d6dead6b AT |
484 | |
485 | while (len) { | |
486 | int n = MIN(len, IO_BUFFER_SIZE-io_buffer_count); | |
487 | if (n > 0) { | |
488 | memcpy(io_buffer+io_buffer_count, buf, n); | |
489 | buf += n; | |
490 | len -= n; | |
491 | io_buffer_count += n; | |
492 | } | |
493 | ||
8d9dc9f9 | 494 | if (io_buffer_count == IO_BUFFER_SIZE) io_flush(); |
d6dead6b | 495 | } |
d6dead6b | 496 | } |
720b47f2 AT |
497 | |
498 | ||
b7922338 | 499 | void write_int(int f,int32 x) |
720b47f2 | 500 | { |
8d9dc9f9 AT |
501 | char b[4]; |
502 | SIVAL(b,0,x); | |
4c36ddbe | 503 | writefd(f,b,4); |
720b47f2 AT |
504 | } |
505 | ||
71c46176 | 506 | void write_longint(int f, int64 x) |
3a6a366f AT |
507 | { |
508 | extern int remote_version; | |
509 | char b[8]; | |
3a6a366f AT |
510 | |
511 | if (remote_version < 16 || x <= 0x7FFFFFFF) { | |
512 | write_int(f, (int)x); | |
513 | return; | |
514 | } | |
515 | ||
8de330a3 | 516 | write_int(f, (int32)0xFFFFFFFF); |
3a6a366f AT |
517 | SIVAL(b,0,(x&0xFFFFFFFF)); |
518 | SIVAL(b,4,((x>>32)&0xFFFFFFFF)); | |
519 | ||
4c36ddbe | 520 | writefd(f,b,8); |
3a6a366f AT |
521 | } |
522 | ||
720b47f2 AT |
523 | void write_buf(int f,char *buf,int len) |
524 | { | |
4c36ddbe | 525 | writefd(f,buf,len); |
720b47f2 AT |
526 | } |
527 | ||
f0fca04e | 528 | /* write a string to the connection */ |
6e4fb64e | 529 | static void write_sbuf(int f,char *buf) |
f0fca04e AT |
530 | { |
531 | write_buf(f, buf, strlen(buf)); | |
532 | } | |
533 | ||
720b47f2 | 534 | |
182dca5c AT |
535 | void write_byte(int f,unsigned char c) |
536 | { | |
f0fca04e | 537 | write_buf(f,(char *)&c,1); |
182dca5c AT |
538 | } |
539 | ||
f0fca04e AT |
540 | int read_line(int f, char *buf, int maxlen) |
541 | { | |
528bfcd7 AT |
542 | eof_error = 0; |
543 | ||
f0fca04e | 544 | while (maxlen) { |
528bfcd7 | 545 | buf[0] = 0; |
f0fca04e | 546 | read_buf(f, buf, 1); |
528bfcd7 | 547 | if (buf[0] == 0) return 0; |
f0fca04e AT |
548 | if (buf[0] == '\n') { |
549 | buf[0] = 0; | |
550 | break; | |
551 | } | |
552 | if (buf[0] != '\r') { | |
553 | buf++; | |
554 | maxlen--; | |
555 | } | |
556 | } | |
557 | if (maxlen == 0) { | |
558 | *buf = 0; | |
559 | return 0; | |
560 | } | |
528bfcd7 AT |
561 | |
562 | eof_error = 1; | |
563 | ||
f0fca04e AT |
564 | return 1; |
565 | } | |
566 | ||
567 | ||
568 | void io_printf(int fd, const char *format, ...) | |
569 | { | |
570 | va_list ap; | |
571 | char buf[1024]; | |
572 | int len; | |
573 | ||
574 | va_start(ap, format); | |
37f9805d | 575 | len = vslprintf(buf, sizeof(buf), format, ap); |
f0fca04e AT |
576 | va_end(ap); |
577 | ||
65417579 | 578 | if (len < 0) exit_cleanup(RERR_STREAMIO); |
f0fca04e AT |
579 | |
580 | write_sbuf(fd, buf); | |
581 | } | |
8d9dc9f9 AT |
582 | |
583 | ||
584 | /* setup for multiplexing an error stream with the data stream */ | |
585 | void io_start_multiplex_out(int fd) | |
586 | { | |
679e7657 AT |
587 | multiplex_out_fd = fd; |
588 | io_flush(); | |
8d9dc9f9 AT |
589 | io_start_buffering(fd); |
590 | io_multiplexing_out = 1; | |
591 | } | |
592 | ||
593 | /* setup for multiplexing an error stream with the data stream */ | |
594 | void io_start_multiplex_in(int fd) | |
595 | { | |
679e7657 AT |
596 | multiplex_in_fd = fd; |
597 | io_flush(); | |
8d9dc9f9 AT |
598 | io_multiplexing_in = 1; |
599 | } | |
600 | ||
554e0a8d | 601 | /* write an message to the multiplexed error stream */ |
ff41a59f | 602 | int io_multiplex_write(enum logcode code, char *buf, int len) |
8d9dc9f9 AT |
603 | { |
604 | if (!io_multiplexing_out) return 0; | |
605 | ||
606 | io_flush(); | |
1b7c47cb | 607 | stats.total_written += (len+4); |
ff41a59f | 608 | mplex_write(multiplex_out_fd, code, buf, len); |
8d9dc9f9 AT |
609 | return 1; |
610 | } | |
611 | ||
554e0a8d | 612 | /* write a message to the special error fd */ |
ff41a59f | 613 | int io_error_write(int f, enum logcode code, char *buf, int len) |
554e0a8d AT |
614 | { |
615 | if (f == -1) return 0; | |
ff41a59f | 616 | mplex_write(f, code, buf, len); |
554e0a8d AT |
617 | return 1; |
618 | } | |
619 | ||
620 | /* stop output multiplexing */ | |
621 | void io_multiplexing_close(void) | |
622 | { | |
623 | io_multiplexing_out = 0; | |
624 | } | |
625 | ||
8d9dc9f9 AT |
626 | void io_close_input(int fd) |
627 | { | |
628 | buffer_f_in = -1; | |
629 | } | |
8b35435f | 630 |