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 | /* | |
21 | Utilities used in rsync | |
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; | |
41 | ||
4c36ddbe | 42 | void setup_readbuffer(int f_in) |
720b47f2 | 43 | { |
22d6234e | 44 | buffer_f_in = f_in; |
720b47f2 AT |
45 | } |
46 | ||
8d9dc9f9 AT |
47 | static void check_timeout(void) |
48 | { | |
49 | time_t t; | |
50 | ||
51 | if (!io_timeout) return; | |
52 | ||
53 | if (!last_io) { | |
54 | last_io = time(NULL); | |
55 | return; | |
56 | } | |
57 | ||
58 | t = time(NULL); | |
59 | ||
86ffe37f AT |
60 | if (last_io && io_timeout && (t-last_io) >= io_timeout) { |
61 | rprintf(FERROR,"io timeout after %d second - exiting\n", | |
8d9dc9f9 | 62 | (int)(t-last_io)); |
65417579 | 63 | exit_cleanup(RERR_TIMEOUT); |
8d9dc9f9 AT |
64 | } |
65 | } | |
66 | ||
720b47f2 | 67 | |
3a6a366f AT |
68 | static char *read_buffer; |
69 | static char *read_buffer_p; | |
70 | static int read_buffer_len; | |
71 | static int read_buffer_size; | |
e44f9a12 | 72 | static int no_flush; |
c46ded46 | 73 | static int no_flush_read; |
720b47f2 | 74 | |
4c36ddbe AT |
75 | /* read from a socket with IO timeout. return the number of |
76 | bytes read. If no bytes can be read then exit, never return | |
77 | a number <= 0 */ | |
78 | static int read_timeout(int fd, char *buf, int len) | |
8d9dc9f9 | 79 | { |
4c36ddbe AT |
80 | int n, ret=0; |
81 | ||
c46ded46 | 82 | no_flush_read++; |
ea2111d1 | 83 | io_flush(); |
c46ded46 | 84 | no_flush_read--; |
ea2111d1 | 85 | |
4c36ddbe AT |
86 | while (ret == 0) { |
87 | fd_set fds; | |
88 | struct timeval tv; | |
89 | ||
90 | FD_ZERO(&fds); | |
91 | FD_SET(fd, &fds); | |
8cd9fd4e | 92 | tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT; |
4c36ddbe AT |
93 | tv.tv_usec = 0; |
94 | ||
8cd9fd4e | 95 | if (select(fd+1, &fds, NULL, NULL, &tv) != 1) { |
4c36ddbe AT |
96 | check_timeout(); |
97 | continue; | |
98 | } | |
99 | ||
100 | n = read(fd, buf, len); | |
101 | ||
8d9dc9f9 AT |
102 | if (n > 0) { |
103 | buf += n; | |
104 | len -= n; | |
4c36ddbe AT |
105 | ret += n; |
106 | if (io_timeout) | |
107 | last_io = time(NULL); | |
108 | continue; | |
8d9dc9f9 | 109 | } |
4c36ddbe AT |
110 | |
111 | if (n == -1 && errno == EINTR) { | |
112 | continue; | |
113 | } | |
114 | ||
f7b93778 AT |
115 | if (n == -1 && |
116 | (errno == EAGAIN || errno == EWOULDBLOCK)) { | |
117 | /* this shouldn't happen, if it does then | |
118 | sleep for a short time to prevent us | |
119 | chewing too much CPU */ | |
120 | u_sleep(100); | |
121 | continue; | |
122 | } | |
123 | ||
8d9dc9f9 | 124 | if (n == 0) { |
528bfcd7 | 125 | if (eof_error) { |
ca8e9694 | 126 | rprintf(FERROR,"unexpected EOF in read_timeout\n"); |
528bfcd7 | 127 | } |
65417579 | 128 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 | 129 | } |
8d9dc9f9 | 130 | |
4c36ddbe | 131 | rprintf(FERROR,"read error: %s\n", strerror(errno)); |
65417579 | 132 | exit_cleanup(RERR_STREAMIO); |
4c36ddbe | 133 | } |
8d9dc9f9 | 134 | |
4c36ddbe AT |
135 | return ret; |
136 | } | |
8d9dc9f9 | 137 | |
4c36ddbe AT |
138 | /* continue trying to read len bytes - don't return until len |
139 | has been read */ | |
140 | static void read_loop(int fd, char *buf, int len) | |
141 | { | |
142 | while (len) { | |
143 | int n = read_timeout(fd, buf, len); | |
144 | ||
145 | buf += n; | |
146 | len -= n; | |
8d9dc9f9 AT |
147 | } |
148 | } | |
149 | ||
cad2bba7 | 150 | /* read from the file descriptor handling multiplexing - |
4c36ddbe AT |
151 | return number of bytes read |
152 | never return <= 0 */ | |
8d9dc9f9 AT |
153 | static int read_unbuffered(int fd, char *buf, int len) |
154 | { | |
155 | static int remaining; | |
156 | char ibuf[4]; | |
157 | int tag, ret=0; | |
158 | char line[1024]; | |
159 | ||
679e7657 | 160 | if (!io_multiplexing_in || fd != multiplex_in_fd) |
4c36ddbe | 161 | return read_timeout(fd, buf, len); |
8d9dc9f9 AT |
162 | |
163 | while (ret == 0) { | |
164 | if (remaining) { | |
165 | len = MIN(len, remaining); | |
166 | read_loop(fd, buf, len); | |
167 | remaining -= len; | |
168 | ret = len; | |
169 | continue; | |
170 | } | |
171 | ||
172 | read_loop(fd, ibuf, 4); | |
173 | tag = IVAL(ibuf, 0); | |
679e7657 | 174 | |
8d9dc9f9 AT |
175 | remaining = tag & 0xFFFFFF; |
176 | tag = tag >> 24; | |
177 | ||
178 | if (tag == MPLEX_BASE) continue; | |
179 | ||
180 | tag -= MPLEX_BASE; | |
181 | ||
182 | if (tag != FERROR && tag != FINFO) { | |
183 | rprintf(FERROR,"unexpected tag %d\n", tag); | |
65417579 | 184 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 AT |
185 | } |
186 | ||
187 | if (remaining > sizeof(line)-1) { | |
188 | rprintf(FERROR,"multiplexing overflow %d\n\n", | |
189 | remaining); | |
65417579 | 190 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 AT |
191 | } |
192 | ||
193 | read_loop(fd, line, remaining); | |
194 | line[remaining] = 0; | |
195 | ||
196 | rprintf(tag,"%s", line); | |
197 | remaining = 0; | |
198 | } | |
199 | ||
200 | return ret; | |
201 | } | |
202 | ||
203 | ||
4c36ddbe | 204 | |
720b47f2 AT |
205 | /* This function was added to overcome a deadlock problem when using |
206 | * ssh. It looks like we can't allow our receive queue to get full or | |
207 | * ssh will clag up. Uggh. */ | |
208 | static void read_check(int f) | |
209 | { | |
4c36ddbe | 210 | int n = 8192; |
720b47f2 | 211 | |
5dd7e031 | 212 | if (f == -1) return; |
05c629f7 | 213 | |
5dd7e031 AT |
214 | if (read_buffer_len == 0) { |
215 | read_buffer_p = read_buffer; | |
216 | } | |
720b47f2 | 217 | |
5dd7e031 AT |
218 | if (n > MAX_READ_BUFFER/4) |
219 | n = MAX_READ_BUFFER/4; | |
720b47f2 | 220 | |
5dd7e031 AT |
221 | if (read_buffer_p != read_buffer) { |
222 | memmove(read_buffer,read_buffer_p,read_buffer_len); | |
223 | read_buffer_p = read_buffer; | |
224 | } | |
720b47f2 | 225 | |
5dd7e031 AT |
226 | if (n > (read_buffer_size - read_buffer_len)) { |
227 | read_buffer_size += n; | |
fe8c0a98 | 228 | read_buffer = (char *)Realloc(read_buffer,read_buffer_size); |
5dd7e031 AT |
229 | if (!read_buffer) out_of_memory("read check"); |
230 | read_buffer_p = read_buffer; | |
231 | } | |
232 | ||
8d9dc9f9 | 233 | n = read_unbuffered(f,read_buffer+read_buffer_len,n); |
4c36ddbe | 234 | read_buffer_len += n; |
720b47f2 AT |
235 | } |
236 | ||
4c36ddbe AT |
237 | |
238 | /* do a buffered read from fd. don't return until all N bytes | |
239 | have been read. If all N can't be read then exit with an error */ | |
240 | static void readfd(int fd,char *buffer,int N) | |
720b47f2 | 241 | { |
6ba9279f AT |
242 | int ret; |
243 | int total=0; | |
6ba9279f | 244 | |
eb601ffe | 245 | if ((read_buffer_len < N) && (N < 1024)) { |
6ba9279f | 246 | read_check(buffer_f_in); |
4c36ddbe | 247 | } |
6ba9279f AT |
248 | |
249 | while (total < N) { | |
250 | if (read_buffer_len > 0 && buffer_f_in == fd) { | |
251 | ret = MIN(read_buffer_len,N-total); | |
252 | memcpy(buffer+total,read_buffer_p,ret); | |
253 | read_buffer_p += ret; | |
254 | read_buffer_len -= ret; | |
a070c37b | 255 | total += ret; |
6ba9279f AT |
256 | continue; |
257 | } | |
258 | ||
c46ded46 | 259 | no_flush_read++; |
8d9dc9f9 | 260 | io_flush(); |
c46ded46 | 261 | no_flush_read--; |
8d9dc9f9 | 262 | |
4c36ddbe | 263 | ret = read_unbuffered(fd,buffer + total,N-total); |
6ba9279f | 264 | total += ret; |
7f28dbee | 265 | } |
1b7c47cb AT |
266 | |
267 | stats.total_read += total; | |
720b47f2 AT |
268 | } |
269 | ||
270 | ||
b7922338 | 271 | int32 read_int(int f) |
720b47f2 | 272 | { |
4c36ddbe | 273 | char b[4]; |
d730b113 AT |
274 | int32 ret; |
275 | ||
4c36ddbe | 276 | readfd(f,b,4); |
d730b113 AT |
277 | ret = IVAL(b,0); |
278 | if (ret == (int32)0xffffffff) return -1; | |
279 | return ret; | |
720b47f2 AT |
280 | } |
281 | ||
71c46176 | 282 | int64 read_longint(int f) |
3a6a366f AT |
283 | { |
284 | extern int remote_version; | |
71c46176 | 285 | int64 ret; |
3a6a366f AT |
286 | char b[8]; |
287 | ret = read_int(f); | |
71c46176 | 288 | |
8de330a3 AT |
289 | if ((int32)ret != (int32)0xffffffff) { |
290 | return ret; | |
291 | } | |
71c46176 | 292 | |
3bee6733 | 293 | #ifdef NO_INT64 |
9486289c | 294 | rprintf(FERROR,"Integer overflow - attempted 64 bit offset\n"); |
65417579 | 295 | exit_cleanup(RERR_UNSUPPORTED); |
71c46176 AT |
296 | #else |
297 | if (remote_version >= 16) { | |
4c36ddbe | 298 | readfd(f,b,8); |
71c46176 | 299 | ret = IVAL(b,0) | (((int64)IVAL(b,4))<<32); |
3a6a366f | 300 | } |
71c46176 AT |
301 | #endif |
302 | ||
3a6a366f AT |
303 | return ret; |
304 | } | |
305 | ||
720b47f2 AT |
306 | void read_buf(int f,char *buf,int len) |
307 | { | |
4c36ddbe | 308 | readfd(f,buf,len); |
720b47f2 AT |
309 | } |
310 | ||
575f2fca AT |
311 | void read_sbuf(int f,char *buf,int len) |
312 | { | |
313 | read_buf(f,buf,len); | |
314 | buf[len] = 0; | |
315 | } | |
316 | ||
182dca5c AT |
317 | unsigned char read_byte(int f) |
318 | { | |
4c36ddbe AT |
319 | unsigned char c; |
320 | read_buf(f,(char *)&c,1); | |
321 | return c; | |
182dca5c | 322 | } |
720b47f2 | 323 | |
7bec6a5c | 324 | |
7bec6a5c | 325 | |
4c36ddbe AT |
326 | /* write len bytes to fd, possibly reading from buffer_f_in if set |
327 | in order to unclog the pipe. don't return until all len | |
328 | bytes have been written */ | |
329 | static void writefd_unbuffered(int fd,char *buf,int len) | |
720b47f2 | 330 | { |
8d9dc9f9 AT |
331 | int total = 0; |
332 | fd_set w_fds, r_fds; | |
4c36ddbe | 333 | int fd_count, count; |
8d9dc9f9 | 334 | struct timeval tv; |
c46ded46 | 335 | int reading=0; |
bf9f0168 | 336 | int blocked=0; |
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); | |
4c36ddbe AT |
344 | fd_count = fd+1; |
345 | ||
c46ded46 | 346 | if (!no_flush_read) { |
2f9af901 | 347 | reading = (buffer_f_in != -1); |
c46ded46 | 348 | } |
c95f1aa9 | 349 | |
4c36ddbe | 350 | if (reading) { |
8d9dc9f9 AT |
351 | FD_SET(buffer_f_in,&r_fds); |
352 | if (buffer_f_in > fd) | |
353 | fd_count = buffer_f_in+1; | |
354 | } | |
355 | ||
8cd9fd4e | 356 | tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT; |
8d9dc9f9 | 357 | tv.tv_usec = 0; |
4c36ddbe AT |
358 | |
359 | count = select(fd_count, | |
360 | reading?&r_fds:NULL, | |
361 | &w_fds,NULL, | |
8cd9fd4e | 362 | &tv); |
4c36ddbe AT |
363 | |
364 | if (count <= 0) { | |
8d9dc9f9 AT |
365 | check_timeout(); |
366 | continue; | |
367 | } | |
4c36ddbe | 368 | |
c95f1aa9 AT |
369 | if (reading && FD_ISSET(buffer_f_in, &r_fds)) { |
370 | read_check(buffer_f_in); | |
371 | } | |
372 | ||
8d9dc9f9 | 373 | if (FD_ISSET(fd, &w_fds)) { |
bf9f0168 AT |
374 | int n = (len-total)>>blocked; |
375 | int ret = write(fd,buf+total,n?n:1); | |
4c36ddbe AT |
376 | |
377 | if (ret == -1 && errno == EINTR) { | |
378 | continue; | |
379 | } | |
380 | ||
f7b93778 AT |
381 | if (ret == -1 && |
382 | (errno == EAGAIN || errno == EWOULDBLOCK)) { | |
bf9f0168 | 383 | blocked++; |
f7b93778 AT |
384 | continue; |
385 | } | |
386 | ||
4c36ddbe AT |
387 | if (ret <= 0) { |
388 | rprintf(FERROR,"erroring writing %d bytes - exiting\n", len); | |
65417579 | 389 | exit_cleanup(RERR_STREAMIO); |
4c36ddbe AT |
390 | } |
391 | ||
bf9f0168 | 392 | blocked = 0; |
4c36ddbe | 393 | total += ret; |
a800434a | 394 | |
4c36ddbe AT |
395 | if (io_timeout) |
396 | last_io = time(NULL); | |
8d9dc9f9 | 397 | } |
4c36ddbe | 398 | } |
e44f9a12 AT |
399 | |
400 | no_flush--; | |
720b47f2 AT |
401 | } |
402 | ||
8d9dc9f9 | 403 | |
d6dead6b AT |
404 | static char *io_buffer; |
405 | static int io_buffer_count; | |
406 | ||
407 | void io_start_buffering(int fd) | |
408 | { | |
8d9dc9f9 | 409 | if (io_buffer) return; |
679e7657 | 410 | multiplex_out_fd = fd; |
8d9dc9f9 | 411 | io_buffer = (char *)malloc(IO_BUFFER_SIZE+4); |
d6dead6b AT |
412 | if (!io_buffer) out_of_memory("writefd"); |
413 | io_buffer_count = 0; | |
8d9dc9f9 AT |
414 | |
415 | /* leave room for the multiplex header in case it's needed */ | |
416 | io_buffer += 4; | |
d6dead6b AT |
417 | } |
418 | ||
8d9dc9f9 | 419 | void io_flush(void) |
d6dead6b | 420 | { |
679e7657 | 421 | int fd = multiplex_out_fd; |
e44f9a12 | 422 | if (!io_buffer_count || no_flush) return; |
8d9dc9f9 AT |
423 | |
424 | if (io_multiplexing_out) { | |
425 | SIVAL(io_buffer-4, 0, (MPLEX_BASE<<24) + io_buffer_count); | |
4c36ddbe | 426 | writefd_unbuffered(fd, io_buffer-4, io_buffer_count+4); |
8d9dc9f9 | 427 | } else { |
4c36ddbe | 428 | writefd_unbuffered(fd, io_buffer, io_buffer_count); |
d6dead6b | 429 | } |
8d9dc9f9 AT |
430 | io_buffer_count = 0; |
431 | } | |
432 | ||
433 | void io_end_buffering(int fd) | |
434 | { | |
435 | io_flush(); | |
436 | if (!io_multiplexing_out) { | |
437 | free(io_buffer-4); | |
438 | io_buffer = NULL; | |
439 | } | |
d6dead6b AT |
440 | } |
441 | ||
4c36ddbe | 442 | static void writefd(int fd,char *buf,int len) |
d6dead6b | 443 | { |
1b7c47cb AT |
444 | stats.total_written += len; |
445 | ||
4c36ddbe AT |
446 | if (!io_buffer) { |
447 | writefd_unbuffered(fd, buf, len); | |
448 | return; | |
449 | } | |
d6dead6b AT |
450 | |
451 | while (len) { | |
452 | int n = MIN(len, IO_BUFFER_SIZE-io_buffer_count); | |
453 | if (n > 0) { | |
454 | memcpy(io_buffer+io_buffer_count, buf, n); | |
455 | buf += n; | |
456 | len -= n; | |
457 | io_buffer_count += n; | |
458 | } | |
459 | ||
8d9dc9f9 | 460 | if (io_buffer_count == IO_BUFFER_SIZE) io_flush(); |
d6dead6b | 461 | } |
d6dead6b | 462 | } |
720b47f2 AT |
463 | |
464 | ||
b7922338 | 465 | void write_int(int f,int32 x) |
720b47f2 | 466 | { |
8d9dc9f9 AT |
467 | char b[4]; |
468 | SIVAL(b,0,x); | |
4c36ddbe | 469 | writefd(f,b,4); |
720b47f2 AT |
470 | } |
471 | ||
71c46176 | 472 | void write_longint(int f, int64 x) |
3a6a366f AT |
473 | { |
474 | extern int remote_version; | |
475 | char b[8]; | |
3a6a366f AT |
476 | |
477 | if (remote_version < 16 || x <= 0x7FFFFFFF) { | |
478 | write_int(f, (int)x); | |
479 | return; | |
480 | } | |
481 | ||
8de330a3 | 482 | write_int(f, (int32)0xFFFFFFFF); |
3a6a366f AT |
483 | SIVAL(b,0,(x&0xFFFFFFFF)); |
484 | SIVAL(b,4,((x>>32)&0xFFFFFFFF)); | |
485 | ||
4c36ddbe | 486 | writefd(f,b,8); |
3a6a366f AT |
487 | } |
488 | ||
720b47f2 AT |
489 | void write_buf(int f,char *buf,int len) |
490 | { | |
4c36ddbe | 491 | writefd(f,buf,len); |
720b47f2 AT |
492 | } |
493 | ||
f0fca04e | 494 | /* write a string to the connection */ |
6e4fb64e | 495 | static void write_sbuf(int f,char *buf) |
f0fca04e AT |
496 | { |
497 | write_buf(f, buf, strlen(buf)); | |
498 | } | |
499 | ||
720b47f2 | 500 | |
182dca5c AT |
501 | void write_byte(int f,unsigned char c) |
502 | { | |
f0fca04e | 503 | write_buf(f,(char *)&c,1); |
182dca5c AT |
504 | } |
505 | ||
f0fca04e AT |
506 | int read_line(int f, char *buf, int maxlen) |
507 | { | |
528bfcd7 AT |
508 | eof_error = 0; |
509 | ||
f0fca04e | 510 | while (maxlen) { |
528bfcd7 | 511 | buf[0] = 0; |
f0fca04e | 512 | read_buf(f, buf, 1); |
528bfcd7 | 513 | if (buf[0] == 0) return 0; |
f0fca04e AT |
514 | if (buf[0] == '\n') { |
515 | buf[0] = 0; | |
516 | break; | |
517 | } | |
518 | if (buf[0] != '\r') { | |
519 | buf++; | |
520 | maxlen--; | |
521 | } | |
522 | } | |
523 | if (maxlen == 0) { | |
524 | *buf = 0; | |
525 | return 0; | |
526 | } | |
528bfcd7 AT |
527 | |
528 | eof_error = 1; | |
529 | ||
f0fca04e AT |
530 | return 1; |
531 | } | |
532 | ||
533 | ||
534 | void io_printf(int fd, const char *format, ...) | |
535 | { | |
536 | va_list ap; | |
537 | char buf[1024]; | |
538 | int len; | |
539 | ||
540 | va_start(ap, format); | |
37f9805d | 541 | len = vslprintf(buf, sizeof(buf), format, ap); |
f0fca04e AT |
542 | va_end(ap); |
543 | ||
65417579 | 544 | if (len < 0) exit_cleanup(RERR_STREAMIO); |
f0fca04e AT |
545 | |
546 | write_sbuf(fd, buf); | |
547 | } | |
8d9dc9f9 AT |
548 | |
549 | ||
550 | /* setup for multiplexing an error stream with the data stream */ | |
551 | void io_start_multiplex_out(int fd) | |
552 | { | |
679e7657 AT |
553 | multiplex_out_fd = fd; |
554 | io_flush(); | |
8d9dc9f9 AT |
555 | io_start_buffering(fd); |
556 | io_multiplexing_out = 1; | |
557 | } | |
558 | ||
559 | /* setup for multiplexing an error stream with the data stream */ | |
560 | void io_start_multiplex_in(int fd) | |
561 | { | |
679e7657 AT |
562 | multiplex_in_fd = fd; |
563 | io_flush(); | |
8d9dc9f9 AT |
564 | if (read_buffer_len) { |
565 | fprintf(stderr,"ERROR: data in read buffer at mplx start\n"); | |
65417579 | 566 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 AT |
567 | } |
568 | ||
569 | io_multiplexing_in = 1; | |
570 | } | |
571 | ||
572 | /* write an message to the error stream */ | |
573 | int io_multiplex_write(int f, char *buf, int len) | |
574 | { | |
575 | if (!io_multiplexing_out) return 0; | |
576 | ||
577 | io_flush(); | |
578 | ||
579 | SIVAL(io_buffer-4, 0, ((MPLEX_BASE + f)<<24) + len); | |
580 | memcpy(io_buffer, buf, len); | |
581 | ||
1b7c47cb AT |
582 | stats.total_written += (len+4); |
583 | ||
679e7657 | 584 | writefd_unbuffered(multiplex_out_fd, io_buffer-4, len+4); |
8d9dc9f9 AT |
585 | return 1; |
586 | } | |
587 | ||
588 | void io_close_input(int fd) | |
589 | { | |
590 | buffer_f_in = -1; | |
591 | } |