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; | |
554e0a8d AT |
41 | static int io_error_fd = -1; |
42 | static int in_read_check; | |
720b47f2 | 43 | |
4c36ddbe | 44 | void setup_readbuffer(int f_in) |
720b47f2 | 45 | { |
22d6234e | 46 | buffer_f_in = f_in; |
720b47f2 AT |
47 | } |
48 | ||
8d9dc9f9 AT |
49 | static void check_timeout(void) |
50 | { | |
51 | time_t t; | |
52 | ||
53 | if (!io_timeout) return; | |
54 | ||
55 | if (!last_io) { | |
56 | last_io = time(NULL); | |
57 | return; | |
58 | } | |
59 | ||
60 | t = time(NULL); | |
61 | ||
86ffe37f AT |
62 | if (last_io && io_timeout && (t-last_io) >= io_timeout) { |
63 | rprintf(FERROR,"io timeout after %d second - exiting\n", | |
8d9dc9f9 | 64 | (int)(t-last_io)); |
65417579 | 65 | exit_cleanup(RERR_TIMEOUT); |
8d9dc9f9 AT |
66 | } |
67 | } | |
68 | ||
554e0a8d AT |
69 | /* setup the fd used to propogate errors */ |
70 | void io_set_error_fd(int fd) | |
71 | { | |
72 | io_error_fd = fd; | |
73 | } | |
74 | ||
75 | /* read some data from the error fd and write it to FERROR */ | |
76 | static void read_error_fd(void) | |
77 | { | |
78 | char buf[200]; | |
79 | int n; | |
80 | int fd = io_error_fd; | |
81 | io_error_fd = -1; | |
82 | ||
83 | n = read(fd, buf, sizeof(buf)-1); | |
84 | if (n > 0) { | |
85 | rwrite(FERROR, buf, n); | |
86 | } | |
87 | ||
88 | io_error_fd = fd; | |
89 | } | |
90 | ||
720b47f2 | 91 | |
3a6a366f AT |
92 | static char *read_buffer; |
93 | static char *read_buffer_p; | |
94 | static int read_buffer_len; | |
95 | static int read_buffer_size; | |
e44f9a12 | 96 | static int no_flush; |
c46ded46 | 97 | static int no_flush_read; |
720b47f2 | 98 | |
4c36ddbe AT |
99 | /* read from a socket with IO timeout. return the number of |
100 | bytes read. If no bytes can be read then exit, never return | |
101 | a number <= 0 */ | |
102 | static int read_timeout(int fd, char *buf, int len) | |
8d9dc9f9 | 103 | { |
4c36ddbe AT |
104 | int n, ret=0; |
105 | ||
c46ded46 | 106 | no_flush_read++; |
ea2111d1 | 107 | io_flush(); |
c46ded46 | 108 | no_flush_read--; |
ea2111d1 | 109 | |
4c36ddbe AT |
110 | while (ret == 0) { |
111 | fd_set fds; | |
112 | struct timeval tv; | |
554e0a8d | 113 | int fd_count = fd+1; |
4c36ddbe AT |
114 | |
115 | FD_ZERO(&fds); | |
116 | FD_SET(fd, &fds); | |
554e0a8d AT |
117 | if (io_error_fd != -1) { |
118 | FD_SET(io_error_fd, &fds); | |
119 | if (io_error_fd > fd) fd_count = io_error_fd+1; | |
120 | } | |
121 | ||
8cd9fd4e | 122 | tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT; |
4c36ddbe AT |
123 | tv.tv_usec = 0; |
124 | ||
554e0a8d AT |
125 | errno = 0; |
126 | ||
127 | if (select(fd_count, &fds, NULL, NULL, &tv) < 1) { | |
128 | if (errno == EBADF) { | |
129 | exit_cleanup(RERR_SOCKETIO); | |
130 | } | |
4c36ddbe AT |
131 | check_timeout(); |
132 | continue; | |
133 | } | |
134 | ||
554e0a8d AT |
135 | if (io_error_fd != -1 && FD_ISSET(io_error_fd, &fds)) { |
136 | read_error_fd(); | |
137 | } | |
138 | ||
139 | if (!FD_ISSET(fd, &fds)) continue; | |
140 | ||
4c36ddbe AT |
141 | n = read(fd, buf, len); |
142 | ||
8d9dc9f9 AT |
143 | if (n > 0) { |
144 | buf += n; | |
145 | len -= n; | |
4c36ddbe AT |
146 | ret += n; |
147 | if (io_timeout) | |
148 | last_io = time(NULL); | |
149 | continue; | |
8d9dc9f9 | 150 | } |
4c36ddbe AT |
151 | |
152 | if (n == -1 && errno == EINTR) { | |
153 | continue; | |
154 | } | |
155 | ||
5d1e1dcf | 156 | |
8d9dc9f9 | 157 | if (n == 0) { |
528bfcd7 | 158 | if (eof_error) { |
ca8e9694 | 159 | rprintf(FERROR,"unexpected EOF in read_timeout\n"); |
528bfcd7 | 160 | } |
65417579 | 161 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 | 162 | } |
8d9dc9f9 | 163 | |
5d1e1dcf | 164 | /* this prevents us trying to write errors on a dead socket */ |
554e0a8d | 165 | io_multiplexing_close(); |
5d1e1dcf | 166 | |
4c36ddbe | 167 | rprintf(FERROR,"read error: %s\n", strerror(errno)); |
65417579 | 168 | exit_cleanup(RERR_STREAMIO); |
4c36ddbe | 169 | } |
8d9dc9f9 | 170 | |
4c36ddbe AT |
171 | return ret; |
172 | } | |
8d9dc9f9 | 173 | |
4c36ddbe AT |
174 | /* continue trying to read len bytes - don't return until len |
175 | has been read */ | |
176 | static void read_loop(int fd, char *buf, int len) | |
177 | { | |
178 | while (len) { | |
179 | int n = read_timeout(fd, buf, len); | |
180 | ||
181 | buf += n; | |
182 | len -= n; | |
8d9dc9f9 AT |
183 | } |
184 | } | |
185 | ||
cad2bba7 | 186 | /* read from the file descriptor handling multiplexing - |
4c36ddbe AT |
187 | return number of bytes read |
188 | never return <= 0 */ | |
8d9dc9f9 AT |
189 | static int read_unbuffered(int fd, char *buf, int len) |
190 | { | |
191 | static int remaining; | |
192 | char ibuf[4]; | |
193 | int tag, ret=0; | |
194 | char line[1024]; | |
195 | ||
679e7657 | 196 | if (!io_multiplexing_in || fd != multiplex_in_fd) |
4c36ddbe | 197 | return read_timeout(fd, buf, len); |
8d9dc9f9 AT |
198 | |
199 | while (ret == 0) { | |
200 | if (remaining) { | |
201 | len = MIN(len, remaining); | |
202 | read_loop(fd, buf, len); | |
203 | remaining -= len; | |
204 | ret = len; | |
205 | continue; | |
206 | } | |
207 | ||
208 | read_loop(fd, ibuf, 4); | |
209 | tag = IVAL(ibuf, 0); | |
679e7657 | 210 | |
8d9dc9f9 AT |
211 | remaining = tag & 0xFFFFFF; |
212 | tag = tag >> 24; | |
213 | ||
214 | if (tag == MPLEX_BASE) continue; | |
215 | ||
216 | tag -= MPLEX_BASE; | |
217 | ||
218 | if (tag != FERROR && tag != FINFO) { | |
219 | rprintf(FERROR,"unexpected tag %d\n", tag); | |
65417579 | 220 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 AT |
221 | } |
222 | ||
223 | if (remaining > sizeof(line)-1) { | |
224 | rprintf(FERROR,"multiplexing overflow %d\n\n", | |
225 | remaining); | |
65417579 | 226 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 AT |
227 | } |
228 | ||
229 | read_loop(fd, line, remaining); | |
230 | line[remaining] = 0; | |
231 | ||
232 | rprintf(tag,"%s", line); | |
233 | remaining = 0; | |
554e0a8d AT |
234 | |
235 | if (in_read_check) break; | |
8d9dc9f9 AT |
236 | } |
237 | ||
238 | return ret; | |
239 | } | |
240 | ||
241 | ||
4c36ddbe | 242 | |
720b47f2 AT |
243 | /* This function was added to overcome a deadlock problem when using |
244 | * ssh. It looks like we can't allow our receive queue to get full or | |
245 | * ssh will clag up. Uggh. */ | |
246 | static void read_check(int f) | |
247 | { | |
4c36ddbe | 248 | int n = 8192; |
554e0a8d AT |
249 | |
250 | in_read_check = 1; | |
720b47f2 | 251 | |
5dd7e031 | 252 | if (f == -1) return; |
05c629f7 | 253 | |
5dd7e031 AT |
254 | if (read_buffer_len == 0) { |
255 | read_buffer_p = read_buffer; | |
256 | } | |
720b47f2 | 257 | |
5dd7e031 AT |
258 | if (n > MAX_READ_BUFFER/4) |
259 | n = MAX_READ_BUFFER/4; | |
720b47f2 | 260 | |
5dd7e031 AT |
261 | if (read_buffer_p != read_buffer) { |
262 | memmove(read_buffer,read_buffer_p,read_buffer_len); | |
263 | read_buffer_p = read_buffer; | |
264 | } | |
720b47f2 | 265 | |
5dd7e031 AT |
266 | if (n > (read_buffer_size - read_buffer_len)) { |
267 | read_buffer_size += n; | |
fe8c0a98 | 268 | read_buffer = (char *)Realloc(read_buffer,read_buffer_size); |
5dd7e031 AT |
269 | if (!read_buffer) out_of_memory("read check"); |
270 | read_buffer_p = read_buffer; | |
271 | } | |
272 | ||
8d9dc9f9 | 273 | n = read_unbuffered(f,read_buffer+read_buffer_len,n); |
4c36ddbe | 274 | read_buffer_len += n; |
554e0a8d AT |
275 | |
276 | in_read_check = 0; | |
720b47f2 AT |
277 | } |
278 | ||
4c36ddbe AT |
279 | |
280 | /* do a buffered read from fd. don't return until all N bytes | |
281 | have been read. If all N can't be read then exit with an error */ | |
282 | static void readfd(int fd,char *buffer,int N) | |
720b47f2 | 283 | { |
6ba9279f AT |
284 | int ret; |
285 | int total=0; | |
6ba9279f | 286 | |
eb601ffe | 287 | if ((read_buffer_len < N) && (N < 1024)) { |
6ba9279f | 288 | read_check(buffer_f_in); |
4c36ddbe | 289 | } |
6ba9279f AT |
290 | |
291 | while (total < N) { | |
292 | if (read_buffer_len > 0 && buffer_f_in == fd) { | |
293 | ret = MIN(read_buffer_len,N-total); | |
294 | memcpy(buffer+total,read_buffer_p,ret); | |
295 | read_buffer_p += ret; | |
296 | read_buffer_len -= ret; | |
a070c37b | 297 | total += ret; |
6ba9279f AT |
298 | continue; |
299 | } | |
300 | ||
c46ded46 | 301 | no_flush_read++; |
8d9dc9f9 | 302 | io_flush(); |
c46ded46 | 303 | no_flush_read--; |
8d9dc9f9 | 304 | |
4c36ddbe | 305 | ret = read_unbuffered(fd,buffer + total,N-total); |
6ba9279f | 306 | total += ret; |
7f28dbee | 307 | } |
1b7c47cb AT |
308 | |
309 | stats.total_read += total; | |
720b47f2 AT |
310 | } |
311 | ||
312 | ||
b7922338 | 313 | int32 read_int(int f) |
720b47f2 | 314 | { |
4c36ddbe | 315 | char b[4]; |
d730b113 AT |
316 | int32 ret; |
317 | ||
4c36ddbe | 318 | readfd(f,b,4); |
d730b113 AT |
319 | ret = IVAL(b,0); |
320 | if (ret == (int32)0xffffffff) return -1; | |
321 | return ret; | |
720b47f2 AT |
322 | } |
323 | ||
71c46176 | 324 | int64 read_longint(int f) |
3a6a366f AT |
325 | { |
326 | extern int remote_version; | |
71c46176 | 327 | int64 ret; |
3a6a366f AT |
328 | char b[8]; |
329 | ret = read_int(f); | |
71c46176 | 330 | |
8de330a3 AT |
331 | if ((int32)ret != (int32)0xffffffff) { |
332 | return ret; | |
333 | } | |
71c46176 | 334 | |
3bee6733 | 335 | #ifdef NO_INT64 |
9486289c | 336 | rprintf(FERROR,"Integer overflow - attempted 64 bit offset\n"); |
65417579 | 337 | exit_cleanup(RERR_UNSUPPORTED); |
71c46176 AT |
338 | #else |
339 | if (remote_version >= 16) { | |
4c36ddbe | 340 | readfd(f,b,8); |
71c46176 | 341 | ret = IVAL(b,0) | (((int64)IVAL(b,4))<<32); |
3a6a366f | 342 | } |
71c46176 AT |
343 | #endif |
344 | ||
3a6a366f AT |
345 | return ret; |
346 | } | |
347 | ||
720b47f2 AT |
348 | void read_buf(int f,char *buf,int len) |
349 | { | |
4c36ddbe | 350 | readfd(f,buf,len); |
720b47f2 AT |
351 | } |
352 | ||
575f2fca AT |
353 | void read_sbuf(int f,char *buf,int len) |
354 | { | |
355 | read_buf(f,buf,len); | |
356 | buf[len] = 0; | |
357 | } | |
358 | ||
182dca5c AT |
359 | unsigned char read_byte(int f) |
360 | { | |
4c36ddbe AT |
361 | unsigned char c; |
362 | read_buf(f,(char *)&c,1); | |
363 | return c; | |
182dca5c | 364 | } |
720b47f2 | 365 | |
7bec6a5c | 366 | |
7bec6a5c | 367 | |
4c36ddbe AT |
368 | /* write len bytes to fd, possibly reading from buffer_f_in if set |
369 | in order to unclog the pipe. don't return until all len | |
370 | bytes have been written */ | |
371 | static void writefd_unbuffered(int fd,char *buf,int len) | |
720b47f2 | 372 | { |
8d9dc9f9 AT |
373 | int total = 0; |
374 | fd_set w_fds, r_fds; | |
4c36ddbe | 375 | int fd_count, count; |
8d9dc9f9 | 376 | struct timeval tv; |
c46ded46 | 377 | int reading=0; |
720b47f2 | 378 | |
e44f9a12 AT |
379 | no_flush++; |
380 | ||
4c36ddbe | 381 | while (total < len) { |
8d9dc9f9 AT |
382 | FD_ZERO(&w_fds); |
383 | FD_ZERO(&r_fds); | |
384 | FD_SET(fd,&w_fds); | |
554e0a8d | 385 | fd_count = fd; |
4c36ddbe | 386 | |
c46ded46 | 387 | if (!no_flush_read) { |
2f9af901 | 388 | reading = (buffer_f_in != -1); |
c46ded46 | 389 | } |
c95f1aa9 | 390 | |
4c36ddbe | 391 | if (reading) { |
8d9dc9f9 | 392 | FD_SET(buffer_f_in,&r_fds); |
554e0a8d AT |
393 | if (buffer_f_in > fd_count) |
394 | fd_count = buffer_f_in; | |
395 | } | |
396 | ||
397 | if (io_error_fd != -1) { | |
398 | FD_SET(io_error_fd,&r_fds); | |
399 | if (io_error_fd > fd_count) | |
400 | fd_count = io_error_fd; | |
8d9dc9f9 AT |
401 | } |
402 | ||
8cd9fd4e | 403 | tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT; |
8d9dc9f9 | 404 | tv.tv_usec = 0; |
4c36ddbe | 405 | |
554e0a8d AT |
406 | errno = 0; |
407 | ||
408 | count = select(fd_count+1, | |
409 | (reading || io_error_fd != -1)?&r_fds:NULL, | |
4c36ddbe | 410 | &w_fds,NULL, |
8cd9fd4e | 411 | &tv); |
4c36ddbe AT |
412 | |
413 | if (count <= 0) { | |
554e0a8d AT |
414 | if (errno == EBADF) { |
415 | exit_cleanup(RERR_SOCKETIO); | |
416 | } | |
8d9dc9f9 AT |
417 | check_timeout(); |
418 | continue; | |
419 | } | |
4c36ddbe | 420 | |
c95f1aa9 AT |
421 | if (reading && FD_ISSET(buffer_f_in, &r_fds)) { |
422 | read_check(buffer_f_in); | |
423 | } | |
424 | ||
554e0a8d AT |
425 | if (io_error_fd != -1 && FD_ISSET(io_error_fd, &r_fds)) { |
426 | read_error_fd(); | |
427 | } | |
428 | ||
8d9dc9f9 | 429 | if (FD_ISSET(fd, &w_fds)) { |
07b7c86c AT |
430 | int ret, n = len-total; |
431 | ||
432 | if (n > PIPE_BUF) n = PIPE_BUF; | |
433 | ||
434 | ret = write(fd,buf+total,n?n:1); | |
4c36ddbe AT |
435 | |
436 | if (ret == -1 && errno == EINTR) { | |
437 | continue; | |
438 | } | |
439 | ||
440 | if (ret <= 0) { | |
441 | rprintf(FERROR,"erroring writing %d bytes - exiting\n", len); | |
65417579 | 442 | exit_cleanup(RERR_STREAMIO); |
4c36ddbe AT |
443 | } |
444 | ||
445 | total += ret; | |
a800434a | 446 | |
4c36ddbe AT |
447 | if (io_timeout) |
448 | last_io = time(NULL); | |
8d9dc9f9 | 449 | } |
4c36ddbe | 450 | } |
e44f9a12 AT |
451 | |
452 | no_flush--; | |
720b47f2 AT |
453 | } |
454 | ||
8d9dc9f9 | 455 | |
d6dead6b AT |
456 | static char *io_buffer; |
457 | static int io_buffer_count; | |
458 | ||
459 | void io_start_buffering(int fd) | |
460 | { | |
8d9dc9f9 | 461 | if (io_buffer) return; |
679e7657 | 462 | multiplex_out_fd = fd; |
8d9dc9f9 | 463 | io_buffer = (char *)malloc(IO_BUFFER_SIZE+4); |
d6dead6b AT |
464 | if (!io_buffer) out_of_memory("writefd"); |
465 | io_buffer_count = 0; | |
8d9dc9f9 AT |
466 | |
467 | /* leave room for the multiplex header in case it's needed */ | |
468 | io_buffer += 4; | |
d6dead6b AT |
469 | } |
470 | ||
8d9dc9f9 | 471 | void io_flush(void) |
d6dead6b | 472 | { |
679e7657 | 473 | int fd = multiplex_out_fd; |
e44f9a12 | 474 | if (!io_buffer_count || no_flush) return; |
8d9dc9f9 AT |
475 | |
476 | if (io_multiplexing_out) { | |
477 | SIVAL(io_buffer-4, 0, (MPLEX_BASE<<24) + io_buffer_count); | |
4c36ddbe | 478 | writefd_unbuffered(fd, io_buffer-4, io_buffer_count+4); |
8d9dc9f9 | 479 | } else { |
4c36ddbe | 480 | writefd_unbuffered(fd, io_buffer, io_buffer_count); |
d6dead6b | 481 | } |
8d9dc9f9 AT |
482 | io_buffer_count = 0; |
483 | } | |
484 | ||
485 | void io_end_buffering(int fd) | |
486 | { | |
487 | io_flush(); | |
488 | if (!io_multiplexing_out) { | |
489 | free(io_buffer-4); | |
490 | io_buffer = NULL; | |
491 | } | |
d6dead6b AT |
492 | } |
493 | ||
4c36ddbe | 494 | static void writefd(int fd,char *buf,int len) |
d6dead6b | 495 | { |
1b7c47cb AT |
496 | stats.total_written += len; |
497 | ||
554e0a8d | 498 | if (!io_buffer || fd != multiplex_out_fd) { |
4c36ddbe AT |
499 | writefd_unbuffered(fd, buf, len); |
500 | return; | |
501 | } | |
d6dead6b AT |
502 | |
503 | while (len) { | |
504 | int n = MIN(len, IO_BUFFER_SIZE-io_buffer_count); | |
505 | if (n > 0) { | |
506 | memcpy(io_buffer+io_buffer_count, buf, n); | |
507 | buf += n; | |
508 | len -= n; | |
509 | io_buffer_count += n; | |
510 | } | |
511 | ||
8d9dc9f9 | 512 | if (io_buffer_count == IO_BUFFER_SIZE) io_flush(); |
d6dead6b | 513 | } |
d6dead6b | 514 | } |
720b47f2 AT |
515 | |
516 | ||
b7922338 | 517 | void write_int(int f,int32 x) |
720b47f2 | 518 | { |
8d9dc9f9 AT |
519 | char b[4]; |
520 | SIVAL(b,0,x); | |
4c36ddbe | 521 | writefd(f,b,4); |
720b47f2 AT |
522 | } |
523 | ||
71c46176 | 524 | void write_longint(int f, int64 x) |
3a6a366f AT |
525 | { |
526 | extern int remote_version; | |
527 | char b[8]; | |
3a6a366f AT |
528 | |
529 | if (remote_version < 16 || x <= 0x7FFFFFFF) { | |
530 | write_int(f, (int)x); | |
531 | return; | |
532 | } | |
533 | ||
8de330a3 | 534 | write_int(f, (int32)0xFFFFFFFF); |
3a6a366f AT |
535 | SIVAL(b,0,(x&0xFFFFFFFF)); |
536 | SIVAL(b,4,((x>>32)&0xFFFFFFFF)); | |
537 | ||
4c36ddbe | 538 | writefd(f,b,8); |
3a6a366f AT |
539 | } |
540 | ||
720b47f2 AT |
541 | void write_buf(int f,char *buf,int len) |
542 | { | |
4c36ddbe | 543 | writefd(f,buf,len); |
720b47f2 AT |
544 | } |
545 | ||
f0fca04e | 546 | /* write a string to the connection */ |
6e4fb64e | 547 | static void write_sbuf(int f,char *buf) |
f0fca04e AT |
548 | { |
549 | write_buf(f, buf, strlen(buf)); | |
550 | } | |
551 | ||
720b47f2 | 552 | |
182dca5c AT |
553 | void write_byte(int f,unsigned char c) |
554 | { | |
f0fca04e | 555 | write_buf(f,(char *)&c,1); |
182dca5c AT |
556 | } |
557 | ||
f0fca04e AT |
558 | int read_line(int f, char *buf, int maxlen) |
559 | { | |
528bfcd7 AT |
560 | eof_error = 0; |
561 | ||
f0fca04e | 562 | while (maxlen) { |
528bfcd7 | 563 | buf[0] = 0; |
f0fca04e | 564 | read_buf(f, buf, 1); |
528bfcd7 | 565 | if (buf[0] == 0) return 0; |
f0fca04e AT |
566 | if (buf[0] == '\n') { |
567 | buf[0] = 0; | |
568 | break; | |
569 | } | |
570 | if (buf[0] != '\r') { | |
571 | buf++; | |
572 | maxlen--; | |
573 | } | |
574 | } | |
575 | if (maxlen == 0) { | |
576 | *buf = 0; | |
577 | return 0; | |
578 | } | |
528bfcd7 AT |
579 | |
580 | eof_error = 1; | |
581 | ||
f0fca04e AT |
582 | return 1; |
583 | } | |
584 | ||
585 | ||
586 | void io_printf(int fd, const char *format, ...) | |
587 | { | |
588 | va_list ap; | |
589 | char buf[1024]; | |
590 | int len; | |
591 | ||
592 | va_start(ap, format); | |
37f9805d | 593 | len = vslprintf(buf, sizeof(buf), format, ap); |
f0fca04e AT |
594 | va_end(ap); |
595 | ||
65417579 | 596 | if (len < 0) exit_cleanup(RERR_STREAMIO); |
f0fca04e AT |
597 | |
598 | write_sbuf(fd, buf); | |
599 | } | |
8d9dc9f9 AT |
600 | |
601 | ||
602 | /* setup for multiplexing an error stream with the data stream */ | |
603 | void io_start_multiplex_out(int fd) | |
604 | { | |
679e7657 AT |
605 | multiplex_out_fd = fd; |
606 | io_flush(); | |
8d9dc9f9 AT |
607 | io_start_buffering(fd); |
608 | io_multiplexing_out = 1; | |
609 | } | |
610 | ||
611 | /* setup for multiplexing an error stream with the data stream */ | |
612 | void io_start_multiplex_in(int fd) | |
613 | { | |
679e7657 AT |
614 | multiplex_in_fd = fd; |
615 | io_flush(); | |
8d9dc9f9 | 616 | if (read_buffer_len) { |
65417579 | 617 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 AT |
618 | } |
619 | ||
620 | io_multiplexing_in = 1; | |
621 | } | |
622 | ||
554e0a8d | 623 | /* write an message to the multiplexed error stream */ |
8d9dc9f9 AT |
624 | int io_multiplex_write(int f, char *buf, int len) |
625 | { | |
626 | if (!io_multiplexing_out) return 0; | |
627 | ||
628 | io_flush(); | |
629 | ||
630 | SIVAL(io_buffer-4, 0, ((MPLEX_BASE + f)<<24) + len); | |
631 | memcpy(io_buffer, buf, len); | |
632 | ||
1b7c47cb AT |
633 | stats.total_written += (len+4); |
634 | ||
679e7657 | 635 | writefd_unbuffered(multiplex_out_fd, io_buffer-4, len+4); |
8d9dc9f9 AT |
636 | return 1; |
637 | } | |
638 | ||
554e0a8d AT |
639 | /* write a message to the special error fd */ |
640 | int io_error_write(int f, char *buf, int len) | |
641 | { | |
642 | if (f == -1) return 0; | |
643 | writefd_unbuffered(f, buf, len); | |
644 | return 1; | |
645 | } | |
646 | ||
647 | /* stop output multiplexing */ | |
648 | void io_multiplexing_close(void) | |
649 | { | |
650 | io_multiplexing_out = 0; | |
651 | } | |
652 | ||
8d9dc9f9 AT |
653 | void io_close_input(int fd) |
654 | { | |
655 | buffer_f_in = -1; | |
656 | } |