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 | ||
71c46176 AT |
27 | static int64 total_written; |
28 | static int64 total_read; | |
720b47f2 | 29 | |
8d9dc9f9 AT |
30 | static int io_multiplexing_out; |
31 | static int io_multiplexing_in; | |
32 | static time_t last_io; | |
33 | ||
720b47f2 | 34 | extern int verbose; |
dc5ddbcc | 35 | extern int sparse_files; |
6ba9279f | 36 | extern int io_timeout; |
720b47f2 | 37 | |
71c46176 | 38 | int64 write_total(void) |
720b47f2 | 39 | { |
8d9dc9f9 | 40 | return total_written; |
720b47f2 AT |
41 | } |
42 | ||
71c46176 | 43 | int64 read_total(void) |
720b47f2 | 44 | { |
8d9dc9f9 | 45 | return total_read; |
720b47f2 AT |
46 | } |
47 | ||
48 | static int buffer_f_in = -1; | |
49 | ||
50 | void setup_nonblocking(int f_in,int f_out) | |
51 | { | |
22d6234e AT |
52 | set_blocking(f_out,0); |
53 | buffer_f_in = f_in; | |
720b47f2 AT |
54 | } |
55 | ||
8d9dc9f9 AT |
56 | static void check_timeout(void) |
57 | { | |
58 | time_t t; | |
59 | ||
60 | if (!io_timeout) return; | |
61 | ||
62 | if (!last_io) { | |
63 | last_io = time(NULL); | |
64 | return; | |
65 | } | |
66 | ||
67 | t = time(NULL); | |
68 | ||
69 | if (last_io && io_timeout && (t-last_io)>io_timeout) { | |
70 | rprintf(FERROR,"read timeout after %d second - exiting\n", | |
71 | (int)(t-last_io)); | |
72 | exit_cleanup(1); | |
73 | } | |
74 | } | |
75 | ||
720b47f2 | 76 | |
3a6a366f AT |
77 | static char *read_buffer; |
78 | static char *read_buffer_p; | |
79 | static int read_buffer_len; | |
80 | static int read_buffer_size; | |
720b47f2 AT |
81 | |
82 | ||
8d9dc9f9 AT |
83 | /* continue trying to read len bytes - don't return until len |
84 | has been read */ | |
85 | static void read_loop(int fd, char *buf, int len) | |
86 | { | |
87 | while (len) { | |
88 | int n = read(fd, buf, len); | |
89 | if (n > 0) { | |
90 | buf += n; | |
91 | len -= n; | |
92 | } | |
93 | if (n == 0) { | |
94 | rprintf(FERROR,"EOF in read_loop\n"); | |
95 | exit_cleanup(1); | |
96 | } | |
97 | if (n == -1) { | |
98 | fd_set fds; | |
99 | struct timeval tv; | |
100 | ||
101 | if (errno != EAGAIN && errno != EWOULDBLOCK) { | |
102 | rprintf(FERROR,"io error: %s\n", | |
103 | strerror(errno)); | |
104 | exit_cleanup(1); | |
105 | } | |
106 | ||
107 | FD_ZERO(&fds); | |
108 | FD_SET(fd, &fds); | |
109 | tv.tv_sec = io_timeout; | |
110 | tv.tv_usec = 0; | |
111 | ||
112 | if (select(fd+1, &fds, NULL, NULL, | |
113 | io_timeout?&tv:NULL) != 1) { | |
114 | check_timeout(); | |
115 | } | |
116 | } | |
117 | } | |
118 | } | |
119 | ||
120 | static int read_unbuffered(int fd, char *buf, int len) | |
121 | { | |
122 | static int remaining; | |
123 | char ibuf[4]; | |
124 | int tag, ret=0; | |
125 | char line[1024]; | |
126 | ||
127 | if (!io_multiplexing_in) return read(fd, buf, len); | |
128 | ||
129 | while (ret == 0) { | |
130 | if (remaining) { | |
131 | len = MIN(len, remaining); | |
132 | read_loop(fd, buf, len); | |
133 | remaining -= len; | |
134 | ret = len; | |
135 | continue; | |
136 | } | |
137 | ||
138 | read_loop(fd, ibuf, 4); | |
139 | tag = IVAL(ibuf, 0); | |
140 | remaining = tag & 0xFFFFFF; | |
141 | tag = tag >> 24; | |
142 | ||
143 | if (tag == MPLEX_BASE) continue; | |
144 | ||
145 | tag -= MPLEX_BASE; | |
146 | ||
147 | if (tag != FERROR && tag != FINFO) { | |
148 | rprintf(FERROR,"unexpected tag %d\n", tag); | |
149 | exit_cleanup(1); | |
150 | } | |
151 | ||
152 | if (remaining > sizeof(line)-1) { | |
153 | rprintf(FERROR,"multiplexing overflow %d\n\n", | |
154 | remaining); | |
155 | exit_cleanup(1); | |
156 | } | |
157 | ||
158 | read_loop(fd, line, remaining); | |
159 | line[remaining] = 0; | |
160 | ||
161 | rprintf(tag,"%s", line); | |
162 | remaining = 0; | |
163 | } | |
164 | ||
165 | return ret; | |
166 | } | |
167 | ||
168 | ||
720b47f2 AT |
169 | /* This function was added to overcome a deadlock problem when using |
170 | * ssh. It looks like we can't allow our receive queue to get full or | |
171 | * ssh will clag up. Uggh. */ | |
172 | static void read_check(int f) | |
173 | { | |
5dd7e031 | 174 | int n; |
720b47f2 | 175 | |
5dd7e031 | 176 | if (f == -1) return; |
05c629f7 | 177 | |
5dd7e031 AT |
178 | if (read_buffer_len == 0) { |
179 | read_buffer_p = read_buffer; | |
180 | } | |
720b47f2 | 181 | |
5dd7e031 AT |
182 | if ((n=num_waiting(f)) <= 0) |
183 | return; | |
720b47f2 | 184 | |
5dd7e031 AT |
185 | /* things could deteriorate if we read in really small chunks */ |
186 | if (n < 10) n = 1024; | |
05c629f7 | 187 | |
5dd7e031 AT |
188 | if (n > MAX_READ_BUFFER/4) |
189 | n = MAX_READ_BUFFER/4; | |
720b47f2 | 190 | |
5dd7e031 AT |
191 | if (read_buffer_p != read_buffer) { |
192 | memmove(read_buffer,read_buffer_p,read_buffer_len); | |
193 | read_buffer_p = read_buffer; | |
194 | } | |
720b47f2 | 195 | |
5dd7e031 AT |
196 | if (n > (read_buffer_size - read_buffer_len)) { |
197 | read_buffer_size += n; | |
198 | if (!read_buffer) | |
199 | read_buffer = (char *)malloc(read_buffer_size); | |
200 | else | |
201 | read_buffer = (char *)realloc(read_buffer,read_buffer_size); | |
202 | if (!read_buffer) out_of_memory("read check"); | |
203 | read_buffer_p = read_buffer; | |
204 | } | |
205 | ||
8d9dc9f9 | 206 | n = read_unbuffered(f,read_buffer+read_buffer_len,n); |
5dd7e031 AT |
207 | if (n > 0) { |
208 | read_buffer_len += n; | |
209 | } | |
720b47f2 AT |
210 | } |
211 | ||
720b47f2 AT |
212 | static int readfd(int fd,char *buffer,int N) |
213 | { | |
6ba9279f AT |
214 | int ret; |
215 | int total=0; | |
216 | struct timeval tv; | |
217 | ||
218 | if (read_buffer_len < N) | |
219 | read_check(buffer_f_in); | |
220 | ||
221 | while (total < N) { | |
222 | if (read_buffer_len > 0 && buffer_f_in == fd) { | |
223 | ret = MIN(read_buffer_len,N-total); | |
224 | memcpy(buffer+total,read_buffer_p,ret); | |
225 | read_buffer_p += ret; | |
226 | read_buffer_len -= ret; | |
a070c37b | 227 | total += ret; |
6ba9279f AT |
228 | continue; |
229 | } | |
230 | ||
8d9dc9f9 AT |
231 | io_flush(); |
232 | ||
233 | while ((ret = read_unbuffered(fd,buffer + total,N-total)) == -1) { | |
6ba9279f AT |
234 | fd_set fds; |
235 | ||
236 | if (errno != EAGAIN && errno != EWOULDBLOCK) | |
237 | return -1; | |
238 | FD_ZERO(&fds); | |
239 | FD_SET(fd, &fds); | |
240 | tv.tv_sec = io_timeout; | |
241 | tv.tv_usec = 0; | |
242 | ||
344fb127 AT |
243 | if (select(fd+1, &fds, NULL, NULL, |
244 | io_timeout?&tv:NULL) != 1) { | |
6ba9279f AT |
245 | check_timeout(); |
246 | } | |
247 | } | |
248 | ||
249 | if (ret <= 0) | |
250 | return total; | |
251 | total += ret; | |
7f28dbee | 252 | } |
720b47f2 | 253 | |
6ba9279f AT |
254 | if (io_timeout) |
255 | last_io = time(NULL); | |
720b47f2 | 256 | return total; |
720b47f2 AT |
257 | } |
258 | ||
259 | ||
b7922338 | 260 | int32 read_int(int f) |
720b47f2 | 261 | { |
4fe159a8 | 262 | int ret; |
720b47f2 | 263 | char b[4]; |
4fe159a8 | 264 | if ((ret=readfd(f,b,4)) != 4) { |
720b47f2 | 265 | if (verbose > 1) |
8d9dc9f9 | 266 | rprintf(FERROR,"(%d) read_int: Error reading %d bytes : %s\n", |
9e31c482 | 267 | getpid(),4,ret==-1?strerror(errno):"EOF"); |
34ccb63e | 268 | exit_cleanup(1); |
720b47f2 AT |
269 | } |
270 | total_read += 4; | |
271 | return IVAL(b,0); | |
272 | } | |
273 | ||
71c46176 | 274 | int64 read_longint(int f) |
3a6a366f AT |
275 | { |
276 | extern int remote_version; | |
71c46176 | 277 | int64 ret; |
3a6a366f AT |
278 | char b[8]; |
279 | ret = read_int(f); | |
71c46176 | 280 | |
b7922338 | 281 | if ((int32)ret != (int32)0xffffffff) return ret; |
71c46176 | 282 | |
3bee6733 | 283 | #ifdef NO_INT64 |
9486289c | 284 | rprintf(FERROR,"Integer overflow - attempted 64 bit offset\n"); |
71c46176 AT |
285 | exit_cleanup(1); |
286 | #else | |
287 | if (remote_version >= 16) { | |
3a6a366f AT |
288 | if ((ret=readfd(f,b,8)) != 8) { |
289 | if (verbose > 1) | |
8d9dc9f9 | 290 | rprintf(FERROR,"(%d) read_longint: Error reading %d bytes : %s\n", |
3a6a366f AT |
291 | getpid(),8,ret==-1?strerror(errno):"EOF"); |
292 | exit_cleanup(1); | |
293 | } | |
294 | total_read += 8; | |
71c46176 | 295 | ret = IVAL(b,0) | (((int64)IVAL(b,4))<<32); |
3a6a366f | 296 | } |
71c46176 AT |
297 | #endif |
298 | ||
3a6a366f AT |
299 | return ret; |
300 | } | |
301 | ||
720b47f2 AT |
302 | void read_buf(int f,char *buf,int len) |
303 | { | |
4fe159a8 AT |
304 | int ret; |
305 | if ((ret=readfd(f,buf,len)) != len) { | |
720b47f2 | 306 | if (verbose > 1) |
8d9dc9f9 | 307 | rprintf(FERROR,"(%d) read_buf: Error reading %d bytes : %s\n", |
9e31c482 | 308 | getpid(),len,ret==-1?strerror(errno):"EOF"); |
34ccb63e | 309 | exit_cleanup(1); |
720b47f2 AT |
310 | } |
311 | total_read += len; | |
312 | } | |
313 | ||
575f2fca AT |
314 | void read_sbuf(int f,char *buf,int len) |
315 | { | |
316 | read_buf(f,buf,len); | |
317 | buf[len] = 0; | |
318 | } | |
319 | ||
182dca5c AT |
320 | unsigned char read_byte(int f) |
321 | { | |
d89322c4 AT |
322 | unsigned char c; |
323 | read_buf(f,(char *)&c,1); | |
324 | return c; | |
182dca5c | 325 | } |
720b47f2 | 326 | |
7bec6a5c | 327 | |
3a6a366f AT |
328 | static char last_byte; |
329 | static int last_sparse; | |
7bec6a5c AT |
330 | |
331 | int sparse_end(int f) | |
332 | { | |
d867229b | 333 | if (last_sparse) { |
73233f0f | 334 | do_lseek(f,-1,SEEK_CUR); |
d867229b AT |
335 | return (write(f,&last_byte,1) == 1 ? 0 : -1); |
336 | } | |
337 | last_sparse = 0; | |
338 | return 0; | |
7bec6a5c AT |
339 | } |
340 | ||
d867229b AT |
341 | |
342 | static int write_sparse(int f,char *buf,int len) | |
7bec6a5c | 343 | { |
d867229b AT |
344 | int l1=0,l2=0; |
345 | int ret; | |
7bec6a5c | 346 | |
d867229b AT |
347 | for (l1=0;l1<len && buf[l1]==0;l1++) ; |
348 | for (l2=0;l2<(len-l1) && buf[len-(l2+1)]==0;l2++) ; | |
7bec6a5c | 349 | |
d867229b | 350 | last_byte = buf[len-1]; |
7bec6a5c | 351 | |
d867229b AT |
352 | if (l1 == len || l2 > 0) |
353 | last_sparse=1; | |
7bec6a5c | 354 | |
d867229b | 355 | if (l1 > 0) |
73233f0f | 356 | do_lseek(f,l1,SEEK_CUR); |
dc5ddbcc | 357 | |
d867229b AT |
358 | if (l1 == len) |
359 | return len; | |
dc5ddbcc | 360 | |
d867229b AT |
361 | if ((ret=write(f,buf+l1,len-(l1+l2))) != len-(l1+l2)) { |
362 | if (ret == -1 || ret == 0) return ret; | |
363 | return (l1+ret); | |
364 | } | |
7bec6a5c | 365 | |
d867229b | 366 | if (l2 > 0) |
73233f0f | 367 | do_lseek(f,l2,SEEK_CUR); |
d867229b AT |
368 | |
369 | return len; | |
370 | } | |
dc5ddbcc | 371 | |
7bec6a5c | 372 | |
d867229b AT |
373 | |
374 | int write_file(int f,char *buf,int len) | |
375 | { | |
376 | int ret = 0; | |
377 | ||
378 | if (!sparse_files) | |
379 | return write(f,buf,len); | |
380 | ||
381 | while (len>0) { | |
382 | int len1 = MIN(len, SPARSE_WRITE_SIZE); | |
383 | int r1 = write_sparse(f, buf, len1); | |
384 | if (r1 <= 0) { | |
385 | if (ret > 0) return ret; | |
386 | return r1; | |
387 | } | |
388 | len -= r1; | |
389 | buf += r1; | |
390 | ret += r1; | |
391 | } | |
392 | return ret; | |
7bec6a5c AT |
393 | } |
394 | ||
720b47f2 | 395 | |
d6dead6b | 396 | static int writefd_unbuffered(int fd,char *buf,int len) |
720b47f2 | 397 | { |
8d9dc9f9 AT |
398 | int total = 0; |
399 | fd_set w_fds, r_fds; | |
400 | int fd_count, count, got_select=0; | |
401 | struct timeval tv; | |
720b47f2 | 402 | |
8d9dc9f9 AT |
403 | while (total < len) { |
404 | int ret = write(fd,buf+total,len-total); | |
720b47f2 | 405 | |
8d9dc9f9 | 406 | if (ret == 0) return total; |
720b47f2 | 407 | |
8d9dc9f9 AT |
408 | if (ret == -1 && !(errno == EWOULDBLOCK || errno == EAGAIN)) |
409 | return -1; | |
720b47f2 | 410 | |
8d9dc9f9 AT |
411 | if (ret == -1 && got_select) { |
412 | /* hmmm, we got a write select on the fd and | |
413 | then failed to write. Why doesn't that | |
414 | mean that the fd is dead? It doesn't on | |
415 | some systems it seems (eg. IRIX) */ | |
416 | u_sleep(1000); | |
417 | } | |
720b47f2 | 418 | |
8d9dc9f9 | 419 | got_select = 0; |
720b47f2 | 420 | |
6ba9279f | 421 | |
8d9dc9f9 AT |
422 | if (ret != -1) { |
423 | total += ret; | |
424 | continue; | |
425 | } | |
426 | ||
427 | if (read_buffer_len < MAX_READ_BUFFER && buffer_f_in != -1) | |
428 | read_check(buffer_f_in); | |
429 | ||
430 | fd_count = fd+1; | |
431 | FD_ZERO(&w_fds); | |
432 | FD_ZERO(&r_fds); | |
433 | FD_SET(fd,&w_fds); | |
434 | if (buffer_f_in != -1) { | |
435 | FD_SET(buffer_f_in,&r_fds); | |
436 | if (buffer_f_in > fd) | |
437 | fd_count = buffer_f_in+1; | |
438 | } | |
439 | ||
440 | tv.tv_sec = BLOCKING_TIMEOUT; | |
441 | tv.tv_usec = 0; | |
442 | count = select(fd_count,buffer_f_in == -1? NULL: &r_fds, | |
443 | &w_fds,NULL,&tv); | |
444 | ||
445 | if (count == -1 && errno != EINTR) { | |
446 | if (verbose > 1) | |
447 | rprintf(FERROR,"select error: %s\n", strerror(errno)); | |
448 | exit_cleanup(1); | |
449 | } | |
450 | ||
451 | if (count == 0) { | |
452 | check_timeout(); | |
453 | continue; | |
454 | } | |
455 | ||
456 | if (FD_ISSET(fd, &w_fds)) { | |
457 | got_select = 1; | |
458 | } | |
459 | } | |
460 | ||
461 | if (io_timeout) | |
462 | last_io = time(NULL); | |
463 | ||
464 | return total; | |
720b47f2 AT |
465 | } |
466 | ||
8d9dc9f9 | 467 | |
d6dead6b AT |
468 | static char *io_buffer; |
469 | static int io_buffer_count; | |
8d9dc9f9 | 470 | static int io_out_fd; |
d6dead6b AT |
471 | |
472 | void io_start_buffering(int fd) | |
473 | { | |
8d9dc9f9 AT |
474 | if (io_buffer) return; |
475 | io_out_fd = fd; | |
476 | io_buffer = (char *)malloc(IO_BUFFER_SIZE+4); | |
d6dead6b AT |
477 | if (!io_buffer) out_of_memory("writefd"); |
478 | io_buffer_count = 0; | |
8d9dc9f9 AT |
479 | |
480 | /* leave room for the multiplex header in case it's needed */ | |
481 | io_buffer += 4; | |
d6dead6b AT |
482 | } |
483 | ||
8d9dc9f9 | 484 | void io_flush(void) |
d6dead6b | 485 | { |
8d9dc9f9 AT |
486 | int fd = io_out_fd; |
487 | if (!io_buffer_count) return; | |
488 | ||
489 | if (io_multiplexing_out) { | |
490 | SIVAL(io_buffer-4, 0, (MPLEX_BASE<<24) + io_buffer_count); | |
491 | if (writefd_unbuffered(fd, io_buffer-4, io_buffer_count+4) != | |
492 | io_buffer_count+4) { | |
493 | rprintf(FERROR,"write failed\n"); | |
494 | exit_cleanup(1); | |
495 | } | |
496 | } else { | |
497 | if (writefd_unbuffered(fd, io_buffer, io_buffer_count) != | |
d6dead6b AT |
498 | io_buffer_count) { |
499 | rprintf(FERROR,"write failed\n"); | |
500 | exit_cleanup(1); | |
501 | } | |
d6dead6b | 502 | } |
8d9dc9f9 AT |
503 | io_buffer_count = 0; |
504 | } | |
505 | ||
506 | void io_end_buffering(int fd) | |
507 | { | |
508 | io_flush(); | |
509 | if (!io_multiplexing_out) { | |
510 | free(io_buffer-4); | |
511 | io_buffer = NULL; | |
512 | } | |
d6dead6b AT |
513 | } |
514 | ||
515 | static int writefd(int fd,char *buf,int len1) | |
516 | { | |
517 | int len = len1; | |
518 | ||
519 | if (!io_buffer) return writefd_unbuffered(fd, buf, len); | |
520 | ||
521 | while (len) { | |
522 | int n = MIN(len, IO_BUFFER_SIZE-io_buffer_count); | |
523 | if (n > 0) { | |
524 | memcpy(io_buffer+io_buffer_count, buf, n); | |
525 | buf += n; | |
526 | len -= n; | |
527 | io_buffer_count += n; | |
528 | } | |
529 | ||
8d9dc9f9 | 530 | if (io_buffer_count == IO_BUFFER_SIZE) io_flush(); |
d6dead6b AT |
531 | } |
532 | ||
533 | return len1; | |
534 | } | |
720b47f2 AT |
535 | |
536 | ||
b7922338 | 537 | void write_int(int f,int32 x) |
720b47f2 | 538 | { |
8d9dc9f9 AT |
539 | int ret; |
540 | char b[4]; | |
541 | SIVAL(b,0,x); | |
542 | if ((ret=writefd(f,b,4)) != 4) { | |
543 | rprintf(FERROR,"write_int failed : %s\n", | |
544 | ret==-1?strerror(errno):"EOF"); | |
545 | exit_cleanup(1); | |
546 | } | |
547 | total_written += 4; | |
720b47f2 AT |
548 | } |
549 | ||
71c46176 | 550 | void write_longint(int f, int64 x) |
3a6a366f AT |
551 | { |
552 | extern int remote_version; | |
553 | char b[8]; | |
554 | int ret; | |
555 | ||
556 | if (remote_version < 16 || x <= 0x7FFFFFFF) { | |
557 | write_int(f, (int)x); | |
558 | return; | |
559 | } | |
560 | ||
561 | write_int(f, -1); | |
562 | SIVAL(b,0,(x&0xFFFFFFFF)); | |
563 | SIVAL(b,4,((x>>32)&0xFFFFFFFF)); | |
564 | ||
565 | if ((ret=writefd(f,b,8)) != 8) { | |
9486289c | 566 | rprintf(FERROR,"write_longint failed : %s\n", |
3a6a366f AT |
567 | ret==-1?strerror(errno):"EOF"); |
568 | exit_cleanup(1); | |
569 | } | |
570 | total_written += 8; | |
571 | } | |
572 | ||
720b47f2 AT |
573 | void write_buf(int f,char *buf,int len) |
574 | { | |
8d9dc9f9 AT |
575 | int ret; |
576 | if ((ret=writefd(f,buf,len)) != len) { | |
577 | rprintf(FERROR,"write_buf failed : %s\n", | |
578 | ret==-1?strerror(errno):"EOF"); | |
579 | exit_cleanup(1); | |
580 | } | |
581 | total_written += len; | |
720b47f2 AT |
582 | } |
583 | ||
f0fca04e AT |
584 | /* write a string to the connection */ |
585 | void write_sbuf(int f,char *buf) | |
586 | { | |
587 | write_buf(f, buf, strlen(buf)); | |
588 | } | |
589 | ||
720b47f2 | 590 | |
182dca5c AT |
591 | void write_byte(int f,unsigned char c) |
592 | { | |
f0fca04e | 593 | write_buf(f,(char *)&c,1); |
182dca5c AT |
594 | } |
595 | ||
720b47f2 AT |
596 | void write_flush(int f) |
597 | { | |
598 | } | |
599 | ||
600 | ||
f0fca04e AT |
601 | int read_line(int f, char *buf, int maxlen) |
602 | { | |
603 | while (maxlen) { | |
604 | read_buf(f, buf, 1); | |
605 | if (buf[0] == '\n') { | |
606 | buf[0] = 0; | |
607 | break; | |
608 | } | |
609 | if (buf[0] != '\r') { | |
610 | buf++; | |
611 | maxlen--; | |
612 | } | |
613 | } | |
614 | if (maxlen == 0) { | |
615 | *buf = 0; | |
616 | return 0; | |
617 | } | |
618 | return 1; | |
619 | } | |
620 | ||
621 | ||
622 | void io_printf(int fd, const char *format, ...) | |
623 | { | |
624 | va_list ap; | |
625 | char buf[1024]; | |
626 | int len; | |
627 | ||
628 | va_start(ap, format); | |
e42c9458 | 629 | len = vslprintf(buf, sizeof(buf)-1, format, ap); |
f0fca04e AT |
630 | va_end(ap); |
631 | ||
632 | if (len < 0) exit_cleanup(1); | |
633 | ||
634 | write_sbuf(fd, buf); | |
635 | } | |
8d9dc9f9 AT |
636 | |
637 | ||
638 | /* setup for multiplexing an error stream with the data stream */ | |
639 | void io_start_multiplex_out(int fd) | |
640 | { | |
641 | io_start_buffering(fd); | |
642 | io_multiplexing_out = 1; | |
643 | } | |
644 | ||
645 | /* setup for multiplexing an error stream with the data stream */ | |
646 | void io_start_multiplex_in(int fd) | |
647 | { | |
648 | if (read_buffer_len) { | |
649 | fprintf(stderr,"ERROR: data in read buffer at mplx start\n"); | |
650 | exit_cleanup(1); | |
651 | } | |
652 | ||
653 | io_multiplexing_in = 1; | |
654 | } | |
655 | ||
656 | /* write an message to the error stream */ | |
657 | int io_multiplex_write(int f, char *buf, int len) | |
658 | { | |
659 | if (!io_multiplexing_out) return 0; | |
660 | ||
661 | io_flush(); | |
662 | ||
663 | SIVAL(io_buffer-4, 0, ((MPLEX_BASE + f)<<24) + len); | |
664 | memcpy(io_buffer, buf, len); | |
665 | ||
666 | writefd_unbuffered(io_out_fd, io_buffer-4, len+4); | |
667 | return 1; | |
668 | } | |
669 | ||
670 | void io_close_input(int fd) | |
671 | { | |
672 | buffer_f_in = -1; | |
673 | } |