Commit | Line | Data |
---|---|---|
7a24c346 MP |
1 | /* -*- c-file-style: "linux" -*- |
2 | ||
ce6c7c63 | 3 | Copyright (C) 1996-2001 by Andrew Tridgell |
720b47f2 | 4 | Copyright (C) Paul Mackerras 1996 |
7a55d06e | 5 | Copyright (C) 2001 by Martin Pool <mbp@samba.org> |
720b47f2 AT |
6 | |
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
21 | ||
22 | /* | |
08f15335 | 23 | socket and pipe IO utilities used in rsync |
720b47f2 AT |
24 | |
25 | tridge, June 1996 | |
26 | */ | |
27 | #include "rsync.h" | |
28 | ||
8cd9fd4e AT |
29 | /* if no timeout is specified then use a 60 second select timeout */ |
30 | #define SELECT_TIMEOUT 60 | |
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; |
7a55d06e MP |
37 | static int no_flush; |
38 | ||
39 | extern int bwlimit; | |
720b47f2 | 40 | extern int verbose; |
6ba9279f | 41 | extern int io_timeout; |
a800434a | 42 | extern struct stats stats; |
720b47f2 | 43 | |
7a55d06e MP |
44 | |
45 | /** Ignore EOF errors while reading a module listing if the remote | |
46 | version is 24 or less. */ | |
47 | int kludge_around_eof = False; | |
48 | ||
49 | ||
554e0a8d | 50 | static int io_error_fd = -1; |
720b47f2 | 51 | |
ff41a59f AT |
52 | static void read_loop(int fd, char *buf, int len); |
53 | ||
8d9dc9f9 AT |
54 | static void check_timeout(void) |
55 | { | |
0adb99b9 | 56 | extern int am_server, am_daemon; |
8d9dc9f9 | 57 | time_t t; |
90ba34e2 AT |
58 | |
59 | err_list_push(); | |
8d9dc9f9 AT |
60 | |
61 | if (!io_timeout) return; | |
62 | ||
63 | if (!last_io) { | |
64 | last_io = time(NULL); | |
65 | return; | |
66 | } | |
67 | ||
68 | t = time(NULL); | |
69 | ||
86ffe37f | 70 | if (last_io && io_timeout && (t-last_io) >= io_timeout) { |
0adb99b9 | 71 | if (!am_server && !am_daemon) { |
ce6c7c63 | 72 | rprintf(FERROR,"io timeout after %d seconds - exiting\n", |
0adb99b9 AT |
73 | (int)(t-last_io)); |
74 | } | |
65417579 | 75 | exit_cleanup(RERR_TIMEOUT); |
8d9dc9f9 AT |
76 | } |
77 | } | |
78 | ||
554e0a8d AT |
79 | /* setup the fd used to propogate errors */ |
80 | void io_set_error_fd(int fd) | |
81 | { | |
82 | io_error_fd = fd; | |
83 | } | |
84 | ||
ff41a59f | 85 | /* read some data from the error fd and write it to the write log code */ |
554e0a8d AT |
86 | static void read_error_fd(void) |
87 | { | |
88 | char buf[200]; | |
89 | int n; | |
90 | int fd = io_error_fd; | |
ff41a59f AT |
91 | int tag, len; |
92 | ||
8886f8d0 MP |
93 | /* io_error_fd is temporarily disabled -- is this meant to |
94 | * prevent indefinite recursion? */ | |
554e0a8d AT |
95 | io_error_fd = -1; |
96 | ||
ff41a59f AT |
97 | read_loop(fd, buf, 4); |
98 | tag = IVAL(buf, 0); | |
99 | ||
100 | len = tag & 0xFFFFFF; | |
101 | tag = tag >> 24; | |
102 | tag -= MPLEX_BASE; | |
103 | ||
104 | while (len) { | |
105 | n = len; | |
106 | if (n > (sizeof(buf)-1)) n = sizeof(buf)-1; | |
107 | read_loop(fd, buf, n); | |
108 | rwrite((enum logcode)tag, buf, n); | |
109 | len -= n; | |
554e0a8d AT |
110 | } |
111 | ||
112 | io_error_fd = fd; | |
113 | } | |
114 | ||
720b47f2 | 115 | |
7a55d06e MP |
116 | static void whine_about_eof (void) |
117 | { | |
118 | /** | |
119 | It's almost always an error to get an EOF when we're trying | |
120 | to read from the network, because the protocol is | |
121 | self-terminating. | |
122 | ||
123 | However, there is one unfortunate cases where it is not, | |
124 | which is rsync <2.4.6 sending a list of modules on a | |
125 | server, since the list is terminated by closing the socket. | |
126 | So, for the section of the program where that is a problem | |
127 | (start_socket_client), kludge_around_eof is True and we | |
128 | just exit. | |
129 | */ | |
130 | ||
131 | if (kludge_around_eof) | |
132 | exit_cleanup (0); | |
133 | else { | |
134 | rprintf (FERROR, | |
135 | "%s: connection unexpectedly closed " | |
136 | "(%.0f bytes read so far)\n", | |
137 | RSYNC_NAME, (double)stats.total_read); | |
138 | ||
139 | exit_cleanup (RERR_STREAMIO); | |
140 | } | |
141 | } | |
720b47f2 | 142 | |
7a55d06e MP |
143 | |
144 | static void die_from_readerr (int err) | |
145 | { | |
146 | /* this prevents us trying to write errors on a dead socket */ | |
147 | io_multiplexing_close(); | |
148 | ||
149 | rprintf(FERROR, "%s: read error: %s\n", | |
150 | RSYNC_NAME, strerror (err)); | |
151 | exit_cleanup(RERR_STREAMIO); | |
152 | } | |
153 | ||
154 | ||
155 | /*! | |
c3563c46 MP |
156 | * Read from a socket with IO timeout. return the number of bytes |
157 | * read. If no bytes can be read then exit, never return a number <= 0. | |
158 | * | |
8886f8d0 MP |
159 | * TODO: If the remote shell connection fails, then current versions |
160 | * actually report an "unexpected EOF" error here. Since it's a | |
161 | * fairly common mistake to try to use rsh when ssh is required, we | |
162 | * should trap that: if we fail to read any data at all, we should | |
163 | * give a better explanation. We can tell whether the connection has | |
164 | * started by looking e.g. at whether the remote version is known yet. | |
c3563c46 | 165 | */ |
7a55d06e | 166 | static int read_timeout (int fd, char *buf, int len) |
8d9dc9f9 | 167 | { |
4c36ddbe AT |
168 | int n, ret=0; |
169 | ||
ea2111d1 AT |
170 | io_flush(); |
171 | ||
4c36ddbe | 172 | while (ret == 0) { |
7a55d06e | 173 | /* until we manage to read *something* */ |
4c36ddbe AT |
174 | fd_set fds; |
175 | struct timeval tv; | |
554e0a8d | 176 | int fd_count = fd+1; |
a57873b7 | 177 | int count; |
4c36ddbe AT |
178 | |
179 | FD_ZERO(&fds); | |
180 | FD_SET(fd, &fds); | |
554e0a8d AT |
181 | if (io_error_fd != -1) { |
182 | FD_SET(io_error_fd, &fds); | |
183 | if (io_error_fd > fd) fd_count = io_error_fd+1; | |
184 | } | |
185 | ||
8cd9fd4e | 186 | tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT; |
4c36ddbe AT |
187 | tv.tv_usec = 0; |
188 | ||
554e0a8d AT |
189 | errno = 0; |
190 | ||
a57873b7 AT |
191 | count = select(fd_count, &fds, NULL, NULL, &tv); |
192 | ||
193 | if (count == 0) { | |
194 | check_timeout(); | |
195 | } | |
196 | ||
197 | if (count <= 0) { | |
554e0a8d AT |
198 | if (errno == EBADF) { |
199 | exit_cleanup(RERR_SOCKETIO); | |
200 | } | |
4c36ddbe AT |
201 | continue; |
202 | } | |
203 | ||
554e0a8d AT |
204 | if (io_error_fd != -1 && FD_ISSET(io_error_fd, &fds)) { |
205 | read_error_fd(); | |
206 | } | |
207 | ||
208 | if (!FD_ISSET(fd, &fds)) continue; | |
209 | ||
4c36ddbe AT |
210 | n = read(fd, buf, len); |
211 | ||
8d9dc9f9 AT |
212 | if (n > 0) { |
213 | buf += n; | |
214 | len -= n; | |
4c36ddbe AT |
215 | ret += n; |
216 | if (io_timeout) | |
217 | last_io = time(NULL); | |
218 | continue; | |
7a55d06e MP |
219 | } else if (n == 0) { |
220 | whine_about_eof (); | |
221 | return -1; /* doesn't return */ | |
222 | } else if (n == -1) { | |
223 | if (errno == EINTR || errno == EWOULDBLOCK || | |
224 | errno == EAGAIN) | |
225 | continue; | |
226 | else | |
227 | die_from_readerr (errno); | |
8d9dc9f9 | 228 | } |
4c36ddbe | 229 | } |
8d9dc9f9 | 230 | |
4c36ddbe AT |
231 | return ret; |
232 | } | |
8d9dc9f9 | 233 | |
7a55d06e MP |
234 | |
235 | ||
236 | ||
237 | /*! Continue trying to read len bytes - don't return until len has | |
238 | been read. */ | |
239 | static void read_loop (int fd, char *buf, int len) | |
4c36ddbe AT |
240 | { |
241 | while (len) { | |
242 | int n = read_timeout(fd, buf, len); | |
243 | ||
244 | buf += n; | |
245 | len -= n; | |
8d9dc9f9 AT |
246 | } |
247 | } | |
248 | ||
7a55d06e MP |
249 | |
250 | /** | |
251 | * Read from the file descriptor handling multiplexing - return number | |
252 | * of bytes read. | |
253 | * | |
254 | * Never returns <= 0. | |
255 | */ | |
8d9dc9f9 AT |
256 | static int read_unbuffered(int fd, char *buf, int len) |
257 | { | |
258 | static int remaining; | |
8d9dc9f9 AT |
259 | int tag, ret=0; |
260 | char line[1024]; | |
261 | ||
7a55d06e | 262 | if (!io_multiplexing_in || fd != multiplex_in_fd) |
4c36ddbe | 263 | return read_timeout(fd, buf, len); |
8d9dc9f9 AT |
264 | |
265 | while (ret == 0) { | |
266 | if (remaining) { | |
267 | len = MIN(len, remaining); | |
268 | read_loop(fd, buf, len); | |
269 | remaining -= len; | |
270 | ret = len; | |
271 | continue; | |
272 | } | |
273 | ||
7a55d06e | 274 | read_loop (fd, line, 4); |
ff41a59f | 275 | tag = IVAL(line, 0); |
679e7657 | 276 | |
8d9dc9f9 AT |
277 | remaining = tag & 0xFFFFFF; |
278 | tag = tag >> 24; | |
279 | ||
280 | if (tag == MPLEX_BASE) continue; | |
281 | ||
282 | tag -= MPLEX_BASE; | |
283 | ||
284 | if (tag != FERROR && tag != FINFO) { | |
285 | rprintf(FERROR,"unexpected tag %d\n", tag); | |
65417579 | 286 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 AT |
287 | } |
288 | ||
289 | if (remaining > sizeof(line)-1) { | |
290 | rprintf(FERROR,"multiplexing overflow %d\n\n", | |
291 | remaining); | |
65417579 | 292 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 AT |
293 | } |
294 | ||
295 | read_loop(fd, line, remaining); | |
296 | line[remaining] = 0; | |
297 | ||
ff41a59f | 298 | rprintf((enum logcode)tag,"%s", line); |
8d9dc9f9 AT |
299 | remaining = 0; |
300 | } | |
301 | ||
302 | return ret; | |
303 | } | |
304 | ||
305 | ||
4c36ddbe AT |
306 | /* do a buffered read from fd. don't return until all N bytes |
307 | have been read. If all N can't be read then exit with an error */ | |
7a55d06e | 308 | static void readfd (int fd, char *buffer, int N) |
720b47f2 | 309 | { |
6ba9279f AT |
310 | int ret; |
311 | int total=0; | |
6ba9279f | 312 | |
6ba9279f | 313 | while (total < N) { |
8d9dc9f9 AT |
314 | io_flush(); |
315 | ||
7a55d06e | 316 | ret = read_unbuffered (fd, buffer + total, N-total); |
6ba9279f | 317 | total += ret; |
7f28dbee | 318 | } |
1b7c47cb AT |
319 | |
320 | stats.total_read += total; | |
720b47f2 AT |
321 | } |
322 | ||
323 | ||
b7922338 | 324 | int32 read_int(int f) |
720b47f2 | 325 | { |
4c36ddbe | 326 | char b[4]; |
d730b113 AT |
327 | int32 ret; |
328 | ||
4c36ddbe | 329 | readfd(f,b,4); |
d730b113 AT |
330 | ret = IVAL(b,0); |
331 | if (ret == (int32)0xffffffff) return -1; | |
332 | return ret; | |
720b47f2 AT |
333 | } |
334 | ||
71c46176 | 335 | int64 read_longint(int f) |
3a6a366f AT |
336 | { |
337 | extern int remote_version; | |
71c46176 | 338 | int64 ret; |
3a6a366f AT |
339 | char b[8]; |
340 | ret = read_int(f); | |
71c46176 | 341 | |
8de330a3 AT |
342 | if ((int32)ret != (int32)0xffffffff) { |
343 | return ret; | |
344 | } | |
71c46176 | 345 | |
3bee6733 | 346 | #ifdef NO_INT64 |
9486289c | 347 | rprintf(FERROR,"Integer overflow - attempted 64 bit offset\n"); |
65417579 | 348 | exit_cleanup(RERR_UNSUPPORTED); |
71c46176 AT |
349 | #else |
350 | if (remote_version >= 16) { | |
4c36ddbe | 351 | readfd(f,b,8); |
71c46176 | 352 | ret = IVAL(b,0) | (((int64)IVAL(b,4))<<32); |
3a6a366f | 353 | } |
71c46176 AT |
354 | #endif |
355 | ||
3a6a366f AT |
356 | return ret; |
357 | } | |
358 | ||
720b47f2 AT |
359 | void read_buf(int f,char *buf,int len) |
360 | { | |
4c36ddbe | 361 | readfd(f,buf,len); |
720b47f2 AT |
362 | } |
363 | ||
575f2fca AT |
364 | void read_sbuf(int f,char *buf,int len) |
365 | { | |
7a55d06e | 366 | read_buf (f,buf,len); |
575f2fca AT |
367 | buf[len] = 0; |
368 | } | |
369 | ||
182dca5c AT |
370 | unsigned char read_byte(int f) |
371 | { | |
4c36ddbe | 372 | unsigned char c; |
7a55d06e | 373 | read_buf (f, (char *)&c, 1); |
4c36ddbe | 374 | return c; |
182dca5c | 375 | } |
720b47f2 | 376 | |
ae682c3e | 377 | /* write len bytes to fd */ |
4c36ddbe | 378 | static void writefd_unbuffered(int fd,char *buf,int len) |
720b47f2 | 379 | { |
8d9dc9f9 AT |
380 | int total = 0; |
381 | fd_set w_fds, r_fds; | |
4c36ddbe | 382 | int fd_count, count; |
8d9dc9f9 | 383 | struct timeval tv; |
720b47f2 | 384 | |
90ba34e2 AT |
385 | err_list_push(); |
386 | ||
e44f9a12 AT |
387 | no_flush++; |
388 | ||
4c36ddbe | 389 | while (total < len) { |
8d9dc9f9 AT |
390 | FD_ZERO(&w_fds); |
391 | FD_ZERO(&r_fds); | |
392 | FD_SET(fd,&w_fds); | |
554e0a8d | 393 | fd_count = fd; |
4c36ddbe | 394 | |
554e0a8d AT |
395 | if (io_error_fd != -1) { |
396 | FD_SET(io_error_fd,&r_fds); | |
397 | if (io_error_fd > fd_count) | |
398 | fd_count = io_error_fd; | |
8d9dc9f9 AT |
399 | } |
400 | ||
8cd9fd4e | 401 | tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT; |
8d9dc9f9 | 402 | tv.tv_usec = 0; |
4c36ddbe | 403 | |
554e0a8d AT |
404 | errno = 0; |
405 | ||
406 | count = select(fd_count+1, | |
08f15335 | 407 | io_error_fd != -1?&r_fds:NULL, |
4c36ddbe | 408 | &w_fds,NULL, |
8cd9fd4e | 409 | &tv); |
4c36ddbe | 410 | |
a57873b7 AT |
411 | if (count == 0) { |
412 | check_timeout(); | |
413 | } | |
414 | ||
4c36ddbe | 415 | if (count <= 0) { |
554e0a8d AT |
416 | if (errno == EBADF) { |
417 | exit_cleanup(RERR_SOCKETIO); | |
418 | } | |
8d9dc9f9 AT |
419 | continue; |
420 | } | |
4c36ddbe | 421 | |
554e0a8d AT |
422 | if (io_error_fd != -1 && FD_ISSET(io_error_fd, &r_fds)) { |
423 | read_error_fd(); | |
424 | } | |
425 | ||
8d9dc9f9 | 426 | if (FD_ISSET(fd, &w_fds)) { |
07b7c86c | 427 | int ret, n = len-total; |
f0359dd0 | 428 | ret = write(fd,buf+total,n); |
4c36ddbe AT |
429 | |
430 | if (ret == -1 && errno == EINTR) { | |
431 | continue; | |
432 | } | |
433 | ||
f0359dd0 AT |
434 | if (ret == -1 && |
435 | (errno == EWOULDBLOCK || errno == EAGAIN)) { | |
e92ee128 | 436 | msleep(1); |
f0359dd0 AT |
437 | continue; |
438 | } | |
439 | ||
4c36ddbe | 440 | if (ret <= 0) { |
ce6c7c63 MP |
441 | rprintf(FERROR, |
442 | "error writing %d unbuffered bytes" | |
443 | " - exiting: %s\n", len, | |
444 | strerror(errno)); | |
65417579 | 445 | exit_cleanup(RERR_STREAMIO); |
4c36ddbe AT |
446 | } |
447 | ||
ef5d23eb DD |
448 | /* Sleep after writing to limit I/O bandwidth */ |
449 | if (bwlimit) | |
450 | { | |
451 | tv.tv_sec = 0; | |
452 | tv.tv_usec = ret * 1000 / bwlimit; | |
453 | while (tv.tv_usec > 1000000) | |
454 | { | |
455 | tv.tv_sec++; | |
456 | tv.tv_usec -= 1000000; | |
457 | } | |
458 | select(0, NULL, NULL, NULL, &tv); | |
459 | } | |
460 | ||
4c36ddbe | 461 | total += ret; |
a800434a | 462 | |
4c36ddbe AT |
463 | if (io_timeout) |
464 | last_io = time(NULL); | |
8d9dc9f9 | 465 | } |
4c36ddbe | 466 | } |
e44f9a12 AT |
467 | |
468 | no_flush--; | |
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; |
ff41a59f | 479 | io_buffer = (char *)malloc(IO_BUFFER_SIZE); |
d6dead6b AT |
480 | if (!io_buffer) out_of_memory("writefd"); |
481 | io_buffer_count = 0; | |
ff41a59f AT |
482 | } |
483 | ||
484 | /* write an message to a multiplexed stream. If this fails then rsync | |
485 | exits */ | |
486 | static void mplex_write(int fd, enum logcode code, char *buf, int len) | |
487 | { | |
488 | char buffer[4096]; | |
489 | int n = len; | |
8d9dc9f9 | 490 | |
ff41a59f AT |
491 | SIVAL(buffer, 0, ((MPLEX_BASE + (int)code)<<24) + len); |
492 | ||
6d7b6081 AT |
493 | if (n > (sizeof(buffer)-4)) { |
494 | n = sizeof(buffer)-4; | |
ff41a59f AT |
495 | } |
496 | ||
497 | memcpy(&buffer[4], buf, n); | |
498 | writefd_unbuffered(fd, buffer, n+4); | |
499 | ||
500 | len -= n; | |
501 | buf += n; | |
502 | ||
6d7b6081 AT |
503 | if (len) { |
504 | writefd_unbuffered(fd, buf, len); | |
505 | } | |
d6dead6b AT |
506 | } |
507 | ||
ff41a59f | 508 | |
8d9dc9f9 | 509 | void io_flush(void) |
d6dead6b | 510 | { |
679e7657 | 511 | int fd = multiplex_out_fd; |
90ba34e2 AT |
512 | |
513 | err_list_push(); | |
514 | ||
e44f9a12 | 515 | if (!io_buffer_count || no_flush) return; |
8d9dc9f9 AT |
516 | |
517 | if (io_multiplexing_out) { | |
0f3203c3 | 518 | mplex_write(fd, FNONE, io_buffer, io_buffer_count); |
8d9dc9f9 | 519 | } else { |
4c36ddbe | 520 | writefd_unbuffered(fd, io_buffer, io_buffer_count); |
d6dead6b | 521 | } |
8d9dc9f9 AT |
522 | io_buffer_count = 0; |
523 | } | |
524 | ||
0ba48136 MP |
525 | |
526 | /* XXX: fd is ignored, which seems a little strange. */ | |
8d9dc9f9 AT |
527 | void io_end_buffering(int fd) |
528 | { | |
529 | io_flush(); | |
530 | if (!io_multiplexing_out) { | |
ff41a59f | 531 | free(io_buffer); |
8d9dc9f9 AT |
532 | io_buffer = NULL; |
533 | } | |
d6dead6b AT |
534 | } |
535 | ||
4c36ddbe | 536 | static void writefd(int fd,char *buf,int len) |
d6dead6b | 537 | { |
1b7c47cb AT |
538 | stats.total_written += len; |
539 | ||
90ba34e2 AT |
540 | err_list_push(); |
541 | ||
554e0a8d | 542 | if (!io_buffer || fd != multiplex_out_fd) { |
4c36ddbe AT |
543 | writefd_unbuffered(fd, buf, len); |
544 | return; | |
545 | } | |
d6dead6b AT |
546 | |
547 | while (len) { | |
548 | int n = MIN(len, IO_BUFFER_SIZE-io_buffer_count); | |
549 | if (n > 0) { | |
550 | memcpy(io_buffer+io_buffer_count, buf, n); | |
551 | buf += n; | |
552 | len -= n; | |
553 | io_buffer_count += n; | |
554 | } | |
555 | ||
8d9dc9f9 | 556 | if (io_buffer_count == IO_BUFFER_SIZE) io_flush(); |
d6dead6b | 557 | } |
d6dead6b | 558 | } |
720b47f2 AT |
559 | |
560 | ||
b7922338 | 561 | void write_int(int f,int32 x) |
720b47f2 | 562 | { |
8d9dc9f9 AT |
563 | char b[4]; |
564 | SIVAL(b,0,x); | |
4c36ddbe | 565 | writefd(f,b,4); |
720b47f2 AT |
566 | } |
567 | ||
7a24c346 MP |
568 | |
569 | /* | |
570 | * Note: int64 may actually be a 32-bit type if ./configure couldn't find any | |
571 | * 64-bit types on this platform. | |
572 | */ | |
71c46176 | 573 | void write_longint(int f, int64 x) |
3a6a366f AT |
574 | { |
575 | extern int remote_version; | |
576 | char b[8]; | |
3a6a366f AT |
577 | |
578 | if (remote_version < 16 || x <= 0x7FFFFFFF) { | |
579 | write_int(f, (int)x); | |
580 | return; | |
581 | } | |
582 | ||
8de330a3 | 583 | write_int(f, (int32)0xFFFFFFFF); |
3a6a366f AT |
584 | SIVAL(b,0,(x&0xFFFFFFFF)); |
585 | SIVAL(b,4,((x>>32)&0xFFFFFFFF)); | |
586 | ||
4c36ddbe | 587 | writefd(f,b,8); |
3a6a366f AT |
588 | } |
589 | ||
720b47f2 AT |
590 | void write_buf(int f,char *buf,int len) |
591 | { | |
4c36ddbe | 592 | writefd(f,buf,len); |
720b47f2 AT |
593 | } |
594 | ||
f0fca04e | 595 | /* write a string to the connection */ |
6e4fb64e | 596 | static void write_sbuf(int f,char *buf) |
f0fca04e AT |
597 | { |
598 | write_buf(f, buf, strlen(buf)); | |
599 | } | |
600 | ||
720b47f2 | 601 | |
182dca5c AT |
602 | void write_byte(int f,unsigned char c) |
603 | { | |
f0fca04e | 604 | write_buf(f,(char *)&c,1); |
182dca5c AT |
605 | } |
606 | ||
7a55d06e MP |
607 | |
608 | ||
f0fca04e AT |
609 | int read_line(int f, char *buf, int maxlen) |
610 | { | |
611 | while (maxlen) { | |
528bfcd7 | 612 | buf[0] = 0; |
f0fca04e | 613 | read_buf(f, buf, 1); |
528bfcd7 | 614 | if (buf[0] == 0) return 0; |
f0fca04e AT |
615 | if (buf[0] == '\n') { |
616 | buf[0] = 0; | |
617 | break; | |
618 | } | |
619 | if (buf[0] != '\r') { | |
620 | buf++; | |
621 | maxlen--; | |
622 | } | |
623 | } | |
624 | if (maxlen == 0) { | |
625 | *buf = 0; | |
626 | return 0; | |
627 | } | |
528bfcd7 | 628 | |
f0fca04e AT |
629 | return 1; |
630 | } | |
631 | ||
632 | ||
633 | void io_printf(int fd, const char *format, ...) | |
634 | { | |
635 | va_list ap; | |
636 | char buf[1024]; | |
637 | int len; | |
638 | ||
639 | va_start(ap, format); | |
8950ac03 | 640 | len = vsnprintf(buf, sizeof(buf), format, ap); |
f0fca04e AT |
641 | va_end(ap); |
642 | ||
65417579 | 643 | if (len < 0) exit_cleanup(RERR_STREAMIO); |
f0fca04e AT |
644 | |
645 | write_sbuf(fd, buf); | |
646 | } | |
8d9dc9f9 AT |
647 | |
648 | ||
649 | /* setup for multiplexing an error stream with the data stream */ | |
650 | void io_start_multiplex_out(int fd) | |
651 | { | |
679e7657 AT |
652 | multiplex_out_fd = fd; |
653 | io_flush(); | |
8d9dc9f9 AT |
654 | io_start_buffering(fd); |
655 | io_multiplexing_out = 1; | |
656 | } | |
657 | ||
658 | /* setup for multiplexing an error stream with the data stream */ | |
659 | void io_start_multiplex_in(int fd) | |
660 | { | |
679e7657 AT |
661 | multiplex_in_fd = fd; |
662 | io_flush(); | |
8d9dc9f9 AT |
663 | io_multiplexing_in = 1; |
664 | } | |
665 | ||
554e0a8d | 666 | /* write an message to the multiplexed error stream */ |
ff41a59f | 667 | int io_multiplex_write(enum logcode code, char *buf, int len) |
8d9dc9f9 AT |
668 | { |
669 | if (!io_multiplexing_out) return 0; | |
670 | ||
671 | io_flush(); | |
1b7c47cb | 672 | stats.total_written += (len+4); |
ff41a59f | 673 | mplex_write(multiplex_out_fd, code, buf, len); |
8d9dc9f9 AT |
674 | return 1; |
675 | } | |
676 | ||
554e0a8d AT |
677 | /* stop output multiplexing */ |
678 | void io_multiplexing_close(void) | |
679 | { | |
680 | io_multiplexing_out = 0; | |
681 | } | |
682 |