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; | |
679e7657 AT |
32 | static int multiplex_in_fd; |
33 | static int multiplex_out_fd; | |
8d9dc9f9 AT |
34 | static time_t last_io; |
35 | ||
720b47f2 | 36 | extern int verbose; |
dc5ddbcc | 37 | extern int sparse_files; |
6ba9279f | 38 | extern int io_timeout; |
720b47f2 | 39 | |
71c46176 | 40 | int64 write_total(void) |
720b47f2 | 41 | { |
8d9dc9f9 | 42 | return total_written; |
720b47f2 AT |
43 | } |
44 | ||
71c46176 | 45 | int64 read_total(void) |
720b47f2 | 46 | { |
8d9dc9f9 | 47 | return total_read; |
720b47f2 AT |
48 | } |
49 | ||
50 | static int buffer_f_in = -1; | |
51 | ||
52 | void setup_nonblocking(int f_in,int f_out) | |
53 | { | |
22d6234e AT |
54 | set_blocking(f_out,0); |
55 | buffer_f_in = f_in; | |
720b47f2 AT |
56 | } |
57 | ||
8d9dc9f9 AT |
58 | static void check_timeout(void) |
59 | { | |
60 | time_t t; | |
61 | ||
62 | if (!io_timeout) return; | |
63 | ||
64 | if (!last_io) { | |
65 | last_io = time(NULL); | |
66 | return; | |
67 | } | |
68 | ||
69 | t = time(NULL); | |
70 | ||
71 | if (last_io && io_timeout && (t-last_io)>io_timeout) { | |
72 | rprintf(FERROR,"read timeout after %d second - exiting\n", | |
73 | (int)(t-last_io)); | |
74 | exit_cleanup(1); | |
75 | } | |
76 | } | |
77 | ||
720b47f2 | 78 | |
3a6a366f AT |
79 | static char *read_buffer; |
80 | static char *read_buffer_p; | |
81 | static int read_buffer_len; | |
82 | static int read_buffer_size; | |
720b47f2 AT |
83 | |
84 | ||
8d9dc9f9 AT |
85 | /* continue trying to read len bytes - don't return until len |
86 | has been read */ | |
87 | static void read_loop(int fd, char *buf, int len) | |
88 | { | |
89 | while (len) { | |
90 | int n = read(fd, buf, len); | |
91 | if (n > 0) { | |
92 | buf += n; | |
93 | len -= n; | |
94 | } | |
95 | if (n == 0) { | |
96 | rprintf(FERROR,"EOF in read_loop\n"); | |
97 | exit_cleanup(1); | |
98 | } | |
99 | if (n == -1) { | |
100 | fd_set fds; | |
101 | struct timeval tv; | |
102 | ||
103 | if (errno != EAGAIN && errno != EWOULDBLOCK) { | |
104 | rprintf(FERROR,"io error: %s\n", | |
105 | strerror(errno)); | |
106 | exit_cleanup(1); | |
107 | } | |
108 | ||
109 | FD_ZERO(&fds); | |
110 | FD_SET(fd, &fds); | |
111 | tv.tv_sec = io_timeout; | |
112 | tv.tv_usec = 0; | |
113 | ||
114 | if (select(fd+1, &fds, NULL, NULL, | |
115 | io_timeout?&tv:NULL) != 1) { | |
116 | check_timeout(); | |
117 | } | |
118 | } | |
119 | } | |
120 | } | |
121 | ||
122 | static int read_unbuffered(int fd, char *buf, int len) | |
123 | { | |
124 | static int remaining; | |
125 | char ibuf[4]; | |
126 | int tag, ret=0; | |
127 | char line[1024]; | |
128 | ||
679e7657 AT |
129 | if (!io_multiplexing_in || fd != multiplex_in_fd) |
130 | return read(fd, buf, len); | |
8d9dc9f9 AT |
131 | |
132 | while (ret == 0) { | |
133 | if (remaining) { | |
134 | len = MIN(len, remaining); | |
135 | read_loop(fd, buf, len); | |
136 | remaining -= len; | |
137 | ret = len; | |
138 | continue; | |
139 | } | |
140 | ||
141 | read_loop(fd, ibuf, 4); | |
142 | tag = IVAL(ibuf, 0); | |
679e7657 | 143 | |
8d9dc9f9 AT |
144 | remaining = tag & 0xFFFFFF; |
145 | tag = tag >> 24; | |
146 | ||
147 | if (tag == MPLEX_BASE) continue; | |
148 | ||
149 | tag -= MPLEX_BASE; | |
150 | ||
151 | if (tag != FERROR && tag != FINFO) { | |
152 | rprintf(FERROR,"unexpected tag %d\n", tag); | |
153 | exit_cleanup(1); | |
154 | } | |
155 | ||
156 | if (remaining > sizeof(line)-1) { | |
157 | rprintf(FERROR,"multiplexing overflow %d\n\n", | |
158 | remaining); | |
159 | exit_cleanup(1); | |
160 | } | |
161 | ||
162 | read_loop(fd, line, remaining); | |
163 | line[remaining] = 0; | |
164 | ||
165 | rprintf(tag,"%s", line); | |
166 | remaining = 0; | |
167 | } | |
168 | ||
169 | return ret; | |
170 | } | |
171 | ||
172 | ||
720b47f2 AT |
173 | /* This function was added to overcome a deadlock problem when using |
174 | * ssh. It looks like we can't allow our receive queue to get full or | |
175 | * ssh will clag up. Uggh. */ | |
176 | static void read_check(int f) | |
177 | { | |
5dd7e031 | 178 | int n; |
720b47f2 | 179 | |
5dd7e031 | 180 | if (f == -1) return; |
05c629f7 | 181 | |
5dd7e031 AT |
182 | if (read_buffer_len == 0) { |
183 | read_buffer_p = read_buffer; | |
184 | } | |
720b47f2 | 185 | |
5dd7e031 AT |
186 | if ((n=num_waiting(f)) <= 0) |
187 | return; | |
720b47f2 | 188 | |
5dd7e031 AT |
189 | /* things could deteriorate if we read in really small chunks */ |
190 | if (n < 10) n = 1024; | |
05c629f7 | 191 | |
5dd7e031 AT |
192 | if (n > MAX_READ_BUFFER/4) |
193 | n = MAX_READ_BUFFER/4; | |
720b47f2 | 194 | |
5dd7e031 AT |
195 | if (read_buffer_p != read_buffer) { |
196 | memmove(read_buffer,read_buffer_p,read_buffer_len); | |
197 | read_buffer_p = read_buffer; | |
198 | } | |
720b47f2 | 199 | |
5dd7e031 AT |
200 | if (n > (read_buffer_size - read_buffer_len)) { |
201 | read_buffer_size += n; | |
202 | if (!read_buffer) | |
203 | read_buffer = (char *)malloc(read_buffer_size); | |
204 | else | |
205 | read_buffer = (char *)realloc(read_buffer,read_buffer_size); | |
206 | if (!read_buffer) out_of_memory("read check"); | |
207 | read_buffer_p = read_buffer; | |
208 | } | |
209 | ||
8d9dc9f9 | 210 | n = read_unbuffered(f,read_buffer+read_buffer_len,n); |
5dd7e031 AT |
211 | if (n > 0) { |
212 | read_buffer_len += n; | |
213 | } | |
720b47f2 AT |
214 | } |
215 | ||
720b47f2 AT |
216 | static int readfd(int fd,char *buffer,int N) |
217 | { | |
6ba9279f AT |
218 | int ret; |
219 | int total=0; | |
220 | struct timeval tv; | |
221 | ||
222 | if (read_buffer_len < N) | |
223 | read_check(buffer_f_in); | |
224 | ||
225 | while (total < N) { | |
226 | if (read_buffer_len > 0 && buffer_f_in == fd) { | |
227 | ret = MIN(read_buffer_len,N-total); | |
228 | memcpy(buffer+total,read_buffer_p,ret); | |
229 | read_buffer_p += ret; | |
230 | read_buffer_len -= ret; | |
a070c37b | 231 | total += ret; |
6ba9279f AT |
232 | continue; |
233 | } | |
234 | ||
8d9dc9f9 AT |
235 | io_flush(); |
236 | ||
237 | while ((ret = read_unbuffered(fd,buffer + total,N-total)) == -1) { | |
6ba9279f AT |
238 | fd_set fds; |
239 | ||
240 | if (errno != EAGAIN && errno != EWOULDBLOCK) | |
241 | return -1; | |
242 | FD_ZERO(&fds); | |
243 | FD_SET(fd, &fds); | |
244 | tv.tv_sec = io_timeout; | |
245 | tv.tv_usec = 0; | |
246 | ||
344fb127 AT |
247 | if (select(fd+1, &fds, NULL, NULL, |
248 | io_timeout?&tv:NULL) != 1) { | |
6ba9279f AT |
249 | check_timeout(); |
250 | } | |
251 | } | |
252 | ||
253 | if (ret <= 0) | |
254 | return total; | |
255 | total += ret; | |
7f28dbee | 256 | } |
720b47f2 | 257 | |
6ba9279f AT |
258 | if (io_timeout) |
259 | last_io = time(NULL); | |
720b47f2 | 260 | return total; |
720b47f2 AT |
261 | } |
262 | ||
263 | ||
b7922338 | 264 | int32 read_int(int f) |
720b47f2 | 265 | { |
4fe159a8 | 266 | int ret; |
720b47f2 | 267 | char b[4]; |
4fe159a8 | 268 | if ((ret=readfd(f,b,4)) != 4) { |
720b47f2 | 269 | if (verbose > 1) |
8d9dc9f9 | 270 | rprintf(FERROR,"(%d) read_int: Error reading %d bytes : %s\n", |
9e31c482 | 271 | getpid(),4,ret==-1?strerror(errno):"EOF"); |
34ccb63e | 272 | exit_cleanup(1); |
720b47f2 AT |
273 | } |
274 | total_read += 4; | |
275 | return IVAL(b,0); | |
276 | } | |
277 | ||
71c46176 | 278 | int64 read_longint(int f) |
3a6a366f AT |
279 | { |
280 | extern int remote_version; | |
71c46176 | 281 | int64 ret; |
3a6a366f AT |
282 | char b[8]; |
283 | ret = read_int(f); | |
71c46176 | 284 | |
b7922338 | 285 | if ((int32)ret != (int32)0xffffffff) return ret; |
71c46176 | 286 | |
3bee6733 | 287 | #ifdef NO_INT64 |
9486289c | 288 | rprintf(FERROR,"Integer overflow - attempted 64 bit offset\n"); |
71c46176 AT |
289 | exit_cleanup(1); |
290 | #else | |
291 | if (remote_version >= 16) { | |
3a6a366f AT |
292 | if ((ret=readfd(f,b,8)) != 8) { |
293 | if (verbose > 1) | |
8d9dc9f9 | 294 | rprintf(FERROR,"(%d) read_longint: Error reading %d bytes : %s\n", |
3a6a366f AT |
295 | getpid(),8,ret==-1?strerror(errno):"EOF"); |
296 | exit_cleanup(1); | |
297 | } | |
298 | total_read += 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 | { | |
4fe159a8 AT |
308 | int ret; |
309 | if ((ret=readfd(f,buf,len)) != len) { | |
720b47f2 | 310 | if (verbose > 1) |
8d9dc9f9 | 311 | rprintf(FERROR,"(%d) read_buf: Error reading %d bytes : %s\n", |
9e31c482 | 312 | getpid(),len,ret==-1?strerror(errno):"EOF"); |
34ccb63e | 313 | exit_cleanup(1); |
720b47f2 AT |
314 | } |
315 | total_read += len; | |
316 | } | |
317 | ||
575f2fca AT |
318 | void read_sbuf(int f,char *buf,int len) |
319 | { | |
320 | read_buf(f,buf,len); | |
321 | buf[len] = 0; | |
322 | } | |
323 | ||
182dca5c AT |
324 | unsigned char read_byte(int f) |
325 | { | |
d89322c4 AT |
326 | unsigned char c; |
327 | read_buf(f,(char *)&c,1); | |
328 | return c; | |
182dca5c | 329 | } |
720b47f2 | 330 | |
7bec6a5c | 331 | |
3a6a366f AT |
332 | static char last_byte; |
333 | static int last_sparse; | |
7bec6a5c AT |
334 | |
335 | int sparse_end(int f) | |
336 | { | |
d867229b | 337 | if (last_sparse) { |
73233f0f | 338 | do_lseek(f,-1,SEEK_CUR); |
d867229b AT |
339 | return (write(f,&last_byte,1) == 1 ? 0 : -1); |
340 | } | |
341 | last_sparse = 0; | |
342 | return 0; | |
7bec6a5c AT |
343 | } |
344 | ||
d867229b AT |
345 | |
346 | static int write_sparse(int f,char *buf,int len) | |
7bec6a5c | 347 | { |
d867229b AT |
348 | int l1=0,l2=0; |
349 | int ret; | |
7bec6a5c | 350 | |
d867229b AT |
351 | for (l1=0;l1<len && buf[l1]==0;l1++) ; |
352 | for (l2=0;l2<(len-l1) && buf[len-(l2+1)]==0;l2++) ; | |
7bec6a5c | 353 | |
d867229b | 354 | last_byte = buf[len-1]; |
7bec6a5c | 355 | |
d867229b AT |
356 | if (l1 == len || l2 > 0) |
357 | last_sparse=1; | |
7bec6a5c | 358 | |
d867229b | 359 | if (l1 > 0) |
73233f0f | 360 | do_lseek(f,l1,SEEK_CUR); |
dc5ddbcc | 361 | |
d867229b AT |
362 | if (l1 == len) |
363 | return len; | |
dc5ddbcc | 364 | |
d867229b AT |
365 | if ((ret=write(f,buf+l1,len-(l1+l2))) != len-(l1+l2)) { |
366 | if (ret == -1 || ret == 0) return ret; | |
367 | return (l1+ret); | |
368 | } | |
7bec6a5c | 369 | |
d867229b | 370 | if (l2 > 0) |
73233f0f | 371 | do_lseek(f,l2,SEEK_CUR); |
d867229b AT |
372 | |
373 | return len; | |
374 | } | |
dc5ddbcc | 375 | |
7bec6a5c | 376 | |
d867229b AT |
377 | |
378 | int write_file(int f,char *buf,int len) | |
379 | { | |
380 | int ret = 0; | |
381 | ||
382 | if (!sparse_files) | |
383 | return write(f,buf,len); | |
384 | ||
385 | while (len>0) { | |
386 | int len1 = MIN(len, SPARSE_WRITE_SIZE); | |
387 | int r1 = write_sparse(f, buf, len1); | |
388 | if (r1 <= 0) { | |
389 | if (ret > 0) return ret; | |
390 | return r1; | |
391 | } | |
392 | len -= r1; | |
393 | buf += r1; | |
394 | ret += r1; | |
395 | } | |
396 | return ret; | |
7bec6a5c AT |
397 | } |
398 | ||
720b47f2 | 399 | |
d6dead6b | 400 | static int writefd_unbuffered(int fd,char *buf,int len) |
720b47f2 | 401 | { |
8d9dc9f9 AT |
402 | int total = 0; |
403 | fd_set w_fds, r_fds; | |
404 | int fd_count, count, got_select=0; | |
405 | struct timeval tv; | |
720b47f2 | 406 | |
8d9dc9f9 AT |
407 | while (total < len) { |
408 | int ret = write(fd,buf+total,len-total); | |
720b47f2 | 409 | |
8d9dc9f9 | 410 | if (ret == 0) return total; |
720b47f2 | 411 | |
8d9dc9f9 AT |
412 | if (ret == -1 && !(errno == EWOULDBLOCK || errno == EAGAIN)) |
413 | return -1; | |
720b47f2 | 414 | |
8d9dc9f9 AT |
415 | if (ret == -1 && got_select) { |
416 | /* hmmm, we got a write select on the fd and | |
417 | then failed to write. Why doesn't that | |
418 | mean that the fd is dead? It doesn't on | |
419 | some systems it seems (eg. IRIX) */ | |
420 | u_sleep(1000); | |
421 | } | |
720b47f2 | 422 | |
8d9dc9f9 | 423 | got_select = 0; |
720b47f2 | 424 | |
6ba9279f | 425 | |
8d9dc9f9 AT |
426 | if (ret != -1) { |
427 | total += ret; | |
428 | continue; | |
429 | } | |
430 | ||
431 | if (read_buffer_len < MAX_READ_BUFFER && buffer_f_in != -1) | |
432 | read_check(buffer_f_in); | |
433 | ||
434 | fd_count = fd+1; | |
435 | FD_ZERO(&w_fds); | |
436 | FD_ZERO(&r_fds); | |
437 | FD_SET(fd,&w_fds); | |
438 | if (buffer_f_in != -1) { | |
439 | FD_SET(buffer_f_in,&r_fds); | |
440 | if (buffer_f_in > fd) | |
441 | fd_count = buffer_f_in+1; | |
442 | } | |
443 | ||
444 | tv.tv_sec = BLOCKING_TIMEOUT; | |
445 | tv.tv_usec = 0; | |
446 | count = select(fd_count,buffer_f_in == -1? NULL: &r_fds, | |
447 | &w_fds,NULL,&tv); | |
448 | ||
449 | if (count == -1 && errno != EINTR) { | |
450 | if (verbose > 1) | |
451 | rprintf(FERROR,"select error: %s\n", strerror(errno)); | |
452 | exit_cleanup(1); | |
453 | } | |
454 | ||
455 | if (count == 0) { | |
456 | check_timeout(); | |
457 | continue; | |
458 | } | |
459 | ||
460 | if (FD_ISSET(fd, &w_fds)) { | |
461 | got_select = 1; | |
462 | } | |
463 | } | |
464 | ||
465 | if (io_timeout) | |
466 | last_io = time(NULL); | |
467 | ||
468 | return total; | |
720b47f2 AT |
469 | } |
470 | ||
8d9dc9f9 | 471 | |
d6dead6b AT |
472 | static char *io_buffer; |
473 | static int io_buffer_count; | |
474 | ||
475 | void io_start_buffering(int fd) | |
476 | { | |
8d9dc9f9 | 477 | if (io_buffer) return; |
679e7657 | 478 | multiplex_out_fd = fd; |
8d9dc9f9 | 479 | io_buffer = (char *)malloc(IO_BUFFER_SIZE+4); |
d6dead6b AT |
480 | if (!io_buffer) out_of_memory("writefd"); |
481 | io_buffer_count = 0; | |
8d9dc9f9 AT |
482 | |
483 | /* leave room for the multiplex header in case it's needed */ | |
484 | io_buffer += 4; | |
d6dead6b AT |
485 | } |
486 | ||
8d9dc9f9 | 487 | void io_flush(void) |
d6dead6b | 488 | { |
679e7657 | 489 | int fd = multiplex_out_fd; |
8d9dc9f9 AT |
490 | if (!io_buffer_count) return; |
491 | ||
492 | if (io_multiplexing_out) { | |
493 | SIVAL(io_buffer-4, 0, (MPLEX_BASE<<24) + io_buffer_count); | |
494 | if (writefd_unbuffered(fd, io_buffer-4, io_buffer_count+4) != | |
495 | io_buffer_count+4) { | |
496 | rprintf(FERROR,"write failed\n"); | |
497 | exit_cleanup(1); | |
498 | } | |
499 | } else { | |
500 | if (writefd_unbuffered(fd, io_buffer, io_buffer_count) != | |
d6dead6b AT |
501 | io_buffer_count) { |
502 | rprintf(FERROR,"write failed\n"); | |
503 | exit_cleanup(1); | |
504 | } | |
d6dead6b | 505 | } |
8d9dc9f9 AT |
506 | io_buffer_count = 0; |
507 | } | |
508 | ||
509 | void io_end_buffering(int fd) | |
510 | { | |
511 | io_flush(); | |
512 | if (!io_multiplexing_out) { | |
513 | free(io_buffer-4); | |
514 | io_buffer = NULL; | |
515 | } | |
d6dead6b AT |
516 | } |
517 | ||
518 | static int writefd(int fd,char *buf,int len1) | |
519 | { | |
520 | int len = len1; | |
521 | ||
522 | if (!io_buffer) return writefd_unbuffered(fd, buf, len); | |
523 | ||
524 | while (len) { | |
525 | int n = MIN(len, IO_BUFFER_SIZE-io_buffer_count); | |
526 | if (n > 0) { | |
527 | memcpy(io_buffer+io_buffer_count, buf, n); | |
528 | buf += n; | |
529 | len -= n; | |
530 | io_buffer_count += n; | |
531 | } | |
532 | ||
8d9dc9f9 | 533 | if (io_buffer_count == IO_BUFFER_SIZE) io_flush(); |
d6dead6b AT |
534 | } |
535 | ||
536 | return len1; | |
537 | } | |
720b47f2 AT |
538 | |
539 | ||
b7922338 | 540 | void write_int(int f,int32 x) |
720b47f2 | 541 | { |
8d9dc9f9 AT |
542 | int ret; |
543 | char b[4]; | |
544 | SIVAL(b,0,x); | |
545 | if ((ret=writefd(f,b,4)) != 4) { | |
546 | rprintf(FERROR,"write_int failed : %s\n", | |
547 | ret==-1?strerror(errno):"EOF"); | |
548 | exit_cleanup(1); | |
549 | } | |
550 | total_written += 4; | |
720b47f2 AT |
551 | } |
552 | ||
71c46176 | 553 | void write_longint(int f, int64 x) |
3a6a366f AT |
554 | { |
555 | extern int remote_version; | |
556 | char b[8]; | |
557 | int ret; | |
558 | ||
559 | if (remote_version < 16 || x <= 0x7FFFFFFF) { | |
560 | write_int(f, (int)x); | |
561 | return; | |
562 | } | |
563 | ||
564 | write_int(f, -1); | |
565 | SIVAL(b,0,(x&0xFFFFFFFF)); | |
566 | SIVAL(b,4,((x>>32)&0xFFFFFFFF)); | |
567 | ||
568 | if ((ret=writefd(f,b,8)) != 8) { | |
9486289c | 569 | rprintf(FERROR,"write_longint failed : %s\n", |
3a6a366f AT |
570 | ret==-1?strerror(errno):"EOF"); |
571 | exit_cleanup(1); | |
572 | } | |
573 | total_written += 8; | |
574 | } | |
575 | ||
720b47f2 AT |
576 | void write_buf(int f,char *buf,int len) |
577 | { | |
8d9dc9f9 AT |
578 | int ret; |
579 | if ((ret=writefd(f,buf,len)) != len) { | |
580 | rprintf(FERROR,"write_buf failed : %s\n", | |
581 | ret==-1?strerror(errno):"EOF"); | |
582 | exit_cleanup(1); | |
583 | } | |
584 | total_written += len; | |
720b47f2 AT |
585 | } |
586 | ||
f0fca04e AT |
587 | /* write a string to the connection */ |
588 | void write_sbuf(int f,char *buf) | |
589 | { | |
590 | write_buf(f, buf, strlen(buf)); | |
591 | } | |
592 | ||
720b47f2 | 593 | |
182dca5c AT |
594 | void write_byte(int f,unsigned char c) |
595 | { | |
f0fca04e | 596 | write_buf(f,(char *)&c,1); |
182dca5c AT |
597 | } |
598 | ||
720b47f2 AT |
599 | void write_flush(int f) |
600 | { | |
601 | } | |
602 | ||
603 | ||
f0fca04e AT |
604 | int read_line(int f, char *buf, int maxlen) |
605 | { | |
606 | while (maxlen) { | |
607 | read_buf(f, buf, 1); | |
608 | if (buf[0] == '\n') { | |
609 | buf[0] = 0; | |
610 | break; | |
611 | } | |
612 | if (buf[0] != '\r') { | |
613 | buf++; | |
614 | maxlen--; | |
615 | } | |
616 | } | |
617 | if (maxlen == 0) { | |
618 | *buf = 0; | |
619 | return 0; | |
620 | } | |
621 | return 1; | |
622 | } | |
623 | ||
624 | ||
625 | void io_printf(int fd, const char *format, ...) | |
626 | { | |
627 | va_list ap; | |
628 | char buf[1024]; | |
629 | int len; | |
630 | ||
631 | va_start(ap, format); | |
e42c9458 | 632 | len = vslprintf(buf, sizeof(buf)-1, format, ap); |
f0fca04e AT |
633 | va_end(ap); |
634 | ||
635 | if (len < 0) exit_cleanup(1); | |
636 | ||
637 | write_sbuf(fd, buf); | |
638 | } | |
8d9dc9f9 AT |
639 | |
640 | ||
641 | /* setup for multiplexing an error stream with the data stream */ | |
642 | void io_start_multiplex_out(int fd) | |
643 | { | |
679e7657 AT |
644 | multiplex_out_fd = fd; |
645 | io_flush(); | |
8d9dc9f9 AT |
646 | io_start_buffering(fd); |
647 | io_multiplexing_out = 1; | |
648 | } | |
649 | ||
650 | /* setup for multiplexing an error stream with the data stream */ | |
651 | void io_start_multiplex_in(int fd) | |
652 | { | |
679e7657 AT |
653 | multiplex_in_fd = fd; |
654 | io_flush(); | |
8d9dc9f9 AT |
655 | if (read_buffer_len) { |
656 | fprintf(stderr,"ERROR: data in read buffer at mplx start\n"); | |
657 | exit_cleanup(1); | |
658 | } | |
659 | ||
660 | io_multiplexing_in = 1; | |
661 | } | |
662 | ||
663 | /* write an message to the error stream */ | |
664 | int io_multiplex_write(int f, char *buf, int len) | |
665 | { | |
666 | if (!io_multiplexing_out) return 0; | |
667 | ||
668 | io_flush(); | |
669 | ||
670 | SIVAL(io_buffer-4, 0, ((MPLEX_BASE + f)<<24) + len); | |
671 | memcpy(io_buffer, buf, len); | |
672 | ||
679e7657 | 673 | writefd_unbuffered(multiplex_out_fd, io_buffer-4, len+4); |
8d9dc9f9 AT |
674 | return 1; |
675 | } | |
676 | ||
677 | void io_close_input(int fd) | |
678 | { | |
679 | buffer_f_in = -1; | |
680 | } |