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 | ||
87ee2481 MP |
22 | /** |
23 | * | |
24 | * @file io.c | |
25 | * | |
26 | * Socket and pipe IO utilities used in rsync. | |
27 | * | |
28 | * rsync provides its own multiplexing system, which is used to send | |
29 | * stderr and stdout over a single socket. We need this because | |
30 | * stdout normally carries the binary data stream, and stderr all our | |
31 | * error messages. | |
32 | * | |
33 | * For historical reasons this is off during the start of the | |
34 | * connection, but it's switched on quite early using | |
35 | * io_start_multiplex_out() and io_start_multiplex_in(). | |
36 | **/ | |
720b47f2 | 37 | |
720b47f2 AT |
38 | #include "rsync.h" |
39 | ||
8cd9fd4e AT |
40 | /* if no timeout is specified then use a 60 second select timeout */ |
41 | #define SELECT_TIMEOUT 60 | |
42 | ||
8d9dc9f9 AT |
43 | static int io_multiplexing_out; |
44 | static int io_multiplexing_in; | |
679e7657 AT |
45 | static int multiplex_in_fd; |
46 | static int multiplex_out_fd; | |
8d9dc9f9 | 47 | static time_t last_io; |
7a55d06e MP |
48 | static int no_flush; |
49 | ||
50 | extern int bwlimit; | |
720b47f2 | 51 | extern int verbose; |
6ba9279f | 52 | extern int io_timeout; |
a800434a | 53 | extern struct stats stats; |
720b47f2 | 54 | |
7a55d06e MP |
55 | |
56 | /** Ignore EOF errors while reading a module listing if the remote | |
57 | version is 24 or less. */ | |
58 | int kludge_around_eof = False; | |
59 | ||
60 | ||
554e0a8d | 61 | static int io_error_fd = -1; |
720b47f2 | 62 | |
9dd891bb | 63 | static void read_loop(int fd, char *buf, size_t len); |
ff41a59f | 64 | |
8d9dc9f9 AT |
65 | static void check_timeout(void) |
66 | { | |
0adb99b9 | 67 | extern int am_server, am_daemon; |
8d9dc9f9 | 68 | time_t t; |
90ba34e2 AT |
69 | |
70 | err_list_push(); | |
8d9dc9f9 AT |
71 | |
72 | if (!io_timeout) return; | |
73 | ||
74 | if (!last_io) { | |
75 | last_io = time(NULL); | |
76 | return; | |
77 | } | |
78 | ||
79 | t = time(NULL); | |
80 | ||
86ffe37f | 81 | if (last_io && io_timeout && (t-last_io) >= io_timeout) { |
0adb99b9 | 82 | if (!am_server && !am_daemon) { |
ce6c7c63 | 83 | rprintf(FERROR,"io timeout after %d seconds - exiting\n", |
0adb99b9 AT |
84 | (int)(t-last_io)); |
85 | } | |
65417579 | 86 | exit_cleanup(RERR_TIMEOUT); |
8d9dc9f9 AT |
87 | } |
88 | } | |
89 | ||
554e0a8d AT |
90 | /* setup the fd used to propogate errors */ |
91 | void io_set_error_fd(int fd) | |
92 | { | |
93 | io_error_fd = fd; | |
94 | } | |
95 | ||
ff41a59f | 96 | /* read some data from the error fd and write it to the write log code */ |
554e0a8d AT |
97 | static void read_error_fd(void) |
98 | { | |
99 | char buf[200]; | |
06ce139f | 100 | size_t n; |
554e0a8d | 101 | int fd = io_error_fd; |
ff41a59f AT |
102 | int tag, len; |
103 | ||
8886f8d0 MP |
104 | /* io_error_fd is temporarily disabled -- is this meant to |
105 | * prevent indefinite recursion? */ | |
554e0a8d AT |
106 | io_error_fd = -1; |
107 | ||
ff41a59f AT |
108 | read_loop(fd, buf, 4); |
109 | tag = IVAL(buf, 0); | |
110 | ||
111 | len = tag & 0xFFFFFF; | |
112 | tag = tag >> 24; | |
113 | tag -= MPLEX_BASE; | |
114 | ||
115 | while (len) { | |
116 | n = len; | |
06ce139f MP |
117 | if (n > (sizeof(buf)-1)) |
118 | n = sizeof(buf)-1; | |
ff41a59f AT |
119 | read_loop(fd, buf, n); |
120 | rwrite((enum logcode)tag, buf, n); | |
121 | len -= n; | |
554e0a8d AT |
122 | } |
123 | ||
124 | io_error_fd = fd; | |
125 | } | |
126 | ||
720b47f2 | 127 | |
7a55d06e MP |
128 | static void whine_about_eof (void) |
129 | { | |
130 | /** | |
131 | It's almost always an error to get an EOF when we're trying | |
132 | to read from the network, because the protocol is | |
133 | self-terminating. | |
134 | ||
135 | However, there is one unfortunate cases where it is not, | |
136 | which is rsync <2.4.6 sending a list of modules on a | |
137 | server, since the list is terminated by closing the socket. | |
138 | So, for the section of the program where that is a problem | |
139 | (start_socket_client), kludge_around_eof is True and we | |
140 | just exit. | |
141 | */ | |
142 | ||
143 | if (kludge_around_eof) | |
144 | exit_cleanup (0); | |
145 | else { | |
146 | rprintf (FERROR, | |
147 | "%s: connection unexpectedly closed " | |
148 | "(%.0f bytes read so far)\n", | |
149 | RSYNC_NAME, (double)stats.total_read); | |
150 | ||
151 | exit_cleanup (RERR_STREAMIO); | |
152 | } | |
153 | } | |
720b47f2 | 154 | |
7a55d06e MP |
155 | |
156 | static void die_from_readerr (int err) | |
157 | { | |
158 | /* this prevents us trying to write errors on a dead socket */ | |
159 | io_multiplexing_close(); | |
160 | ||
161 | rprintf(FERROR, "%s: read error: %s\n", | |
162 | RSYNC_NAME, strerror (err)); | |
163 | exit_cleanup(RERR_STREAMIO); | |
164 | } | |
165 | ||
166 | ||
167 | /*! | |
c3563c46 MP |
168 | * Read from a socket with IO timeout. return the number of bytes |
169 | * read. If no bytes can be read then exit, never return a number <= 0. | |
170 | * | |
8886f8d0 MP |
171 | * TODO: If the remote shell connection fails, then current versions |
172 | * actually report an "unexpected EOF" error here. Since it's a | |
173 | * fairly common mistake to try to use rsh when ssh is required, we | |
174 | * should trap that: if we fail to read any data at all, we should | |
175 | * give a better explanation. We can tell whether the connection has | |
176 | * started by looking e.g. at whether the remote version is known yet. | |
c3563c46 | 177 | */ |
9dd891bb | 178 | static int read_timeout (int fd, char *buf, size_t len) |
8d9dc9f9 | 179 | { |
4c36ddbe AT |
180 | int n, ret=0; |
181 | ||
ea2111d1 AT |
182 | io_flush(); |
183 | ||
4c36ddbe | 184 | while (ret == 0) { |
7a55d06e | 185 | /* until we manage to read *something* */ |
4c36ddbe AT |
186 | fd_set fds; |
187 | struct timeval tv; | |
554e0a8d | 188 | int fd_count = fd+1; |
a57873b7 | 189 | int count; |
4c36ddbe AT |
190 | |
191 | FD_ZERO(&fds); | |
192 | FD_SET(fd, &fds); | |
554e0a8d AT |
193 | if (io_error_fd != -1) { |
194 | FD_SET(io_error_fd, &fds); | |
195 | if (io_error_fd > fd) fd_count = io_error_fd+1; | |
196 | } | |
197 | ||
8cd9fd4e | 198 | tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT; |
4c36ddbe AT |
199 | tv.tv_usec = 0; |
200 | ||
554e0a8d AT |
201 | errno = 0; |
202 | ||
a57873b7 AT |
203 | count = select(fd_count, &fds, NULL, NULL, &tv); |
204 | ||
205 | if (count == 0) { | |
206 | check_timeout(); | |
207 | } | |
208 | ||
209 | if (count <= 0) { | |
554e0a8d AT |
210 | if (errno == EBADF) { |
211 | exit_cleanup(RERR_SOCKETIO); | |
212 | } | |
4c36ddbe AT |
213 | continue; |
214 | } | |
215 | ||
554e0a8d AT |
216 | if (io_error_fd != -1 && FD_ISSET(io_error_fd, &fds)) { |
217 | read_error_fd(); | |
218 | } | |
219 | ||
220 | if (!FD_ISSET(fd, &fds)) continue; | |
221 | ||
4c36ddbe AT |
222 | n = read(fd, buf, len); |
223 | ||
8d9dc9f9 AT |
224 | if (n > 0) { |
225 | buf += n; | |
226 | len -= n; | |
4c36ddbe AT |
227 | ret += n; |
228 | if (io_timeout) | |
229 | last_io = time(NULL); | |
230 | continue; | |
7a55d06e MP |
231 | } else if (n == 0) { |
232 | whine_about_eof (); | |
233 | return -1; /* doesn't return */ | |
234 | } else if (n == -1) { | |
235 | if (errno == EINTR || errno == EWOULDBLOCK || | |
236 | errno == EAGAIN) | |
237 | continue; | |
238 | else | |
239 | die_from_readerr (errno); | |
8d9dc9f9 | 240 | } |
4c36ddbe | 241 | } |
8d9dc9f9 | 242 | |
4c36ddbe AT |
243 | return ret; |
244 | } | |
8d9dc9f9 | 245 | |
7a55d06e MP |
246 | |
247 | ||
248 | ||
249 | /*! Continue trying to read len bytes - don't return until len has | |
250 | been read. */ | |
9dd891bb | 251 | static void read_loop (int fd, char *buf, size_t len) |
4c36ddbe AT |
252 | { |
253 | while (len) { | |
254 | int n = read_timeout(fd, buf, len); | |
255 | ||
256 | buf += n; | |
257 | len -= n; | |
8d9dc9f9 AT |
258 | } |
259 | } | |
260 | ||
7a55d06e MP |
261 | |
262 | /** | |
263 | * Read from the file descriptor handling multiplexing - return number | |
264 | * of bytes read. | |
265 | * | |
266 | * Never returns <= 0. | |
267 | */ | |
9dd891bb | 268 | static int read_unbuffered(int fd, char *buf, size_t len) |
8d9dc9f9 | 269 | { |
6fe25398 | 270 | static size_t remaining; |
909ce14f | 271 | int tag, ret = 0; |
8d9dc9f9 AT |
272 | char line[1024]; |
273 | ||
7a55d06e | 274 | if (!io_multiplexing_in || fd != multiplex_in_fd) |
4c36ddbe | 275 | return read_timeout(fd, buf, len); |
8d9dc9f9 AT |
276 | |
277 | while (ret == 0) { | |
278 | if (remaining) { | |
279 | len = MIN(len, remaining); | |
280 | read_loop(fd, buf, len); | |
281 | remaining -= len; | |
282 | ret = len; | |
283 | continue; | |
284 | } | |
285 | ||
909ce14f | 286 | read_loop(fd, line, 4); |
ff41a59f | 287 | tag = IVAL(line, 0); |
679e7657 | 288 | |
8d9dc9f9 AT |
289 | remaining = tag & 0xFFFFFF; |
290 | tag = tag >> 24; | |
291 | ||
909ce14f MP |
292 | if (tag == MPLEX_BASE) |
293 | continue; | |
8d9dc9f9 AT |
294 | |
295 | tag -= MPLEX_BASE; | |
296 | ||
297 | if (tag != FERROR && tag != FINFO) { | |
909ce14f | 298 | rprintf(FERROR, "unexpected tag %d\n", tag); |
65417579 | 299 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 AT |
300 | } |
301 | ||
909ce14f MP |
302 | if (remaining > sizeof(line) - 1) { |
303 | rprintf(FERROR, "multiplexing overflow %d\n\n", | |
8d9dc9f9 | 304 | remaining); |
65417579 | 305 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 AT |
306 | } |
307 | ||
308 | read_loop(fd, line, remaining); | |
309 | line[remaining] = 0; | |
310 | ||
909ce14f | 311 | rprintf((enum logcode) tag, "%s", line); |
8d9dc9f9 AT |
312 | remaining = 0; |
313 | } | |
314 | ||
315 | return ret; | |
316 | } | |
317 | ||
318 | ||
909ce14f | 319 | |
4c36ddbe AT |
320 | /* do a buffered read from fd. don't return until all N bytes |
321 | have been read. If all N can't be read then exit with an error */ | |
9dd891bb | 322 | static void readfd (int fd, char *buffer, size_t N) |
720b47f2 | 323 | { |
6ba9279f | 324 | int ret; |
06ce139f | 325 | size_t total=0; |
6ba9279f | 326 | |
6ba9279f | 327 | while (total < N) { |
8d9dc9f9 AT |
328 | io_flush(); |
329 | ||
7a55d06e | 330 | ret = read_unbuffered (fd, buffer + total, N-total); |
6ba9279f | 331 | total += ret; |
7f28dbee | 332 | } |
1b7c47cb AT |
333 | |
334 | stats.total_read += total; | |
720b47f2 AT |
335 | } |
336 | ||
337 | ||
b7922338 | 338 | int32 read_int(int f) |
720b47f2 | 339 | { |
4c36ddbe | 340 | char b[4]; |
d730b113 AT |
341 | int32 ret; |
342 | ||
4c36ddbe | 343 | readfd(f,b,4); |
d730b113 AT |
344 | ret = IVAL(b,0); |
345 | if (ret == (int32)0xffffffff) return -1; | |
346 | return ret; | |
720b47f2 AT |
347 | } |
348 | ||
71c46176 | 349 | int64 read_longint(int f) |
3a6a366f AT |
350 | { |
351 | extern int remote_version; | |
71c46176 | 352 | int64 ret; |
3a6a366f AT |
353 | char b[8]; |
354 | ret = read_int(f); | |
71c46176 | 355 | |
8de330a3 AT |
356 | if ((int32)ret != (int32)0xffffffff) { |
357 | return ret; | |
358 | } | |
71c46176 | 359 | |
3bee6733 | 360 | #ifdef NO_INT64 |
9486289c | 361 | rprintf(FERROR,"Integer overflow - attempted 64 bit offset\n"); |
65417579 | 362 | exit_cleanup(RERR_UNSUPPORTED); |
71c46176 AT |
363 | #else |
364 | if (remote_version >= 16) { | |
4c36ddbe | 365 | readfd(f,b,8); |
71c46176 | 366 | ret = IVAL(b,0) | (((int64)IVAL(b,4))<<32); |
3a6a366f | 367 | } |
71c46176 AT |
368 | #endif |
369 | ||
3a6a366f AT |
370 | return ret; |
371 | } | |
372 | ||
9dd891bb | 373 | void read_buf(int f,char *buf,size_t len) |
720b47f2 | 374 | { |
4c36ddbe | 375 | readfd(f,buf,len); |
720b47f2 AT |
376 | } |
377 | ||
9dd891bb | 378 | void read_sbuf(int f,char *buf,size_t len) |
575f2fca | 379 | { |
7a55d06e | 380 | read_buf (f,buf,len); |
575f2fca AT |
381 | buf[len] = 0; |
382 | } | |
383 | ||
182dca5c AT |
384 | unsigned char read_byte(int f) |
385 | { | |
4c36ddbe | 386 | unsigned char c; |
7a55d06e | 387 | read_buf (f, (char *)&c, 1); |
4c36ddbe | 388 | return c; |
182dca5c | 389 | } |
720b47f2 | 390 | |
87ee2481 MP |
391 | /* Write len bytes to fd. This underlies the multiplexing system, |
392 | * which is always called by application code. */ | |
9dd891bb | 393 | static void writefd_unbuffered(int fd,char *buf,size_t len) |
720b47f2 | 394 | { |
06ce139f | 395 | size_t total = 0; |
8d9dc9f9 | 396 | fd_set w_fds, r_fds; |
4c36ddbe | 397 | int fd_count, count; |
8d9dc9f9 | 398 | struct timeval tv; |
720b47f2 | 399 | |
90ba34e2 AT |
400 | err_list_push(); |
401 | ||
e44f9a12 AT |
402 | no_flush++; |
403 | ||
4c36ddbe | 404 | while (total < len) { |
8d9dc9f9 AT |
405 | FD_ZERO(&w_fds); |
406 | FD_ZERO(&r_fds); | |
407 | FD_SET(fd,&w_fds); | |
554e0a8d | 408 | fd_count = fd; |
4c36ddbe | 409 | |
554e0a8d AT |
410 | if (io_error_fd != -1) { |
411 | FD_SET(io_error_fd,&r_fds); | |
412 | if (io_error_fd > fd_count) | |
413 | fd_count = io_error_fd; | |
8d9dc9f9 AT |
414 | } |
415 | ||
8cd9fd4e | 416 | tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT; |
8d9dc9f9 | 417 | tv.tv_usec = 0; |
4c36ddbe | 418 | |
554e0a8d AT |
419 | errno = 0; |
420 | ||
421 | count = select(fd_count+1, | |
08f15335 | 422 | io_error_fd != -1?&r_fds:NULL, |
4c36ddbe | 423 | &w_fds,NULL, |
8cd9fd4e | 424 | &tv); |
4c36ddbe | 425 | |
a57873b7 AT |
426 | if (count == 0) { |
427 | check_timeout(); | |
428 | } | |
429 | ||
4c36ddbe | 430 | if (count <= 0) { |
554e0a8d AT |
431 | if (errno == EBADF) { |
432 | exit_cleanup(RERR_SOCKETIO); | |
433 | } | |
8d9dc9f9 AT |
434 | continue; |
435 | } | |
4c36ddbe | 436 | |
554e0a8d AT |
437 | if (io_error_fd != -1 && FD_ISSET(io_error_fd, &r_fds)) { |
438 | read_error_fd(); | |
439 | } | |
440 | ||
8d9dc9f9 | 441 | if (FD_ISSET(fd, &w_fds)) { |
06ce139f MP |
442 | int ret; |
443 | size_t n = len-total; | |
f0359dd0 | 444 | ret = write(fd,buf+total,n); |
4c36ddbe AT |
445 | |
446 | if (ret == -1 && errno == EINTR) { | |
447 | continue; | |
448 | } | |
449 | ||
f0359dd0 AT |
450 | if (ret == -1 && |
451 | (errno == EWOULDBLOCK || errno == EAGAIN)) { | |
e92ee128 | 452 | msleep(1); |
f0359dd0 AT |
453 | continue; |
454 | } | |
455 | ||
4c36ddbe | 456 | if (ret <= 0) { |
befbfe61 MP |
457 | /* Don't try to write errors back |
458 | * across the stream */ | |
459 | io_multiplexing_close(); | |
3ce0f9a6 MP |
460 | rprintf(FERROR, RSYNC_NAME |
461 | ": error writing %d unbuffered bytes" | |
ce6c7c63 MP |
462 | " - exiting: %s\n", len, |
463 | strerror(errno)); | |
65417579 | 464 | exit_cleanup(RERR_STREAMIO); |
4c36ddbe AT |
465 | } |
466 | ||
ef5d23eb DD |
467 | /* Sleep after writing to limit I/O bandwidth */ |
468 | if (bwlimit) | |
469 | { | |
470 | tv.tv_sec = 0; | |
471 | tv.tv_usec = ret * 1000 / bwlimit; | |
472 | while (tv.tv_usec > 1000000) | |
473 | { | |
474 | tv.tv_sec++; | |
475 | tv.tv_usec -= 1000000; | |
476 | } | |
477 | select(0, NULL, NULL, NULL, &tv); | |
478 | } | |
479 | ||
4c36ddbe | 480 | total += ret; |
a800434a | 481 | |
4c36ddbe AT |
482 | if (io_timeout) |
483 | last_io = time(NULL); | |
8d9dc9f9 | 484 | } |
4c36ddbe | 485 | } |
e44f9a12 AT |
486 | |
487 | no_flush--; | |
720b47f2 AT |
488 | } |
489 | ||
8d9dc9f9 | 490 | |
d6dead6b AT |
491 | static char *io_buffer; |
492 | static int io_buffer_count; | |
493 | ||
494 | void io_start_buffering(int fd) | |
495 | { | |
8d9dc9f9 | 496 | if (io_buffer) return; |
679e7657 | 497 | multiplex_out_fd = fd; |
ff41a59f | 498 | io_buffer = (char *)malloc(IO_BUFFER_SIZE); |
d6dead6b AT |
499 | if (!io_buffer) out_of_memory("writefd"); |
500 | io_buffer_count = 0; | |
ff41a59f AT |
501 | } |
502 | ||
503 | /* write an message to a multiplexed stream. If this fails then rsync | |
504 | exits */ | |
9dd891bb | 505 | static void mplex_write(int fd, enum logcode code, char *buf, size_t len) |
ff41a59f AT |
506 | { |
507 | char buffer[4096]; | |
06ce139f | 508 | size_t n = len; |
8d9dc9f9 | 509 | |
ff41a59f AT |
510 | SIVAL(buffer, 0, ((MPLEX_BASE + (int)code)<<24) + len); |
511 | ||
6d7b6081 AT |
512 | if (n > (sizeof(buffer)-4)) { |
513 | n = sizeof(buffer)-4; | |
ff41a59f AT |
514 | } |
515 | ||
516 | memcpy(&buffer[4], buf, n); | |
517 | writefd_unbuffered(fd, buffer, n+4); | |
518 | ||
519 | len -= n; | |
520 | buf += n; | |
521 | ||
6d7b6081 AT |
522 | if (len) { |
523 | writefd_unbuffered(fd, buf, len); | |
524 | } | |
d6dead6b AT |
525 | } |
526 | ||
ff41a59f | 527 | |
8d9dc9f9 | 528 | void io_flush(void) |
d6dead6b | 529 | { |
679e7657 | 530 | int fd = multiplex_out_fd; |
90ba34e2 AT |
531 | |
532 | err_list_push(); | |
533 | ||
e44f9a12 | 534 | if (!io_buffer_count || no_flush) return; |
8d9dc9f9 AT |
535 | |
536 | if (io_multiplexing_out) { | |
0f3203c3 | 537 | mplex_write(fd, FNONE, io_buffer, io_buffer_count); |
8d9dc9f9 | 538 | } else { |
4c36ddbe | 539 | writefd_unbuffered(fd, io_buffer, io_buffer_count); |
d6dead6b | 540 | } |
8d9dc9f9 AT |
541 | io_buffer_count = 0; |
542 | } | |
543 | ||
0ba48136 | 544 | |
7b5c3eb0 | 545 | void io_end_buffering(void) |
8d9dc9f9 AT |
546 | { |
547 | io_flush(); | |
548 | if (!io_multiplexing_out) { | |
ff41a59f | 549 | free(io_buffer); |
8d9dc9f9 AT |
550 | io_buffer = NULL; |
551 | } | |
d6dead6b AT |
552 | } |
553 | ||
9dd891bb | 554 | static void writefd(int fd,char *buf,size_t len) |
d6dead6b | 555 | { |
1b7c47cb AT |
556 | stats.total_written += len; |
557 | ||
90ba34e2 AT |
558 | err_list_push(); |
559 | ||
554e0a8d | 560 | if (!io_buffer || fd != multiplex_out_fd) { |
4c36ddbe AT |
561 | writefd_unbuffered(fd, buf, len); |
562 | return; | |
563 | } | |
d6dead6b AT |
564 | |
565 | while (len) { | |
7b5c3eb0 | 566 | int n = MIN((int) len, IO_BUFFER_SIZE-io_buffer_count); |
d6dead6b AT |
567 | if (n > 0) { |
568 | memcpy(io_buffer+io_buffer_count, buf, n); | |
569 | buf += n; | |
570 | len -= n; | |
571 | io_buffer_count += n; | |
572 | } | |
573 | ||
8d9dc9f9 | 574 | if (io_buffer_count == IO_BUFFER_SIZE) io_flush(); |
d6dead6b | 575 | } |
d6dead6b | 576 | } |
720b47f2 AT |
577 | |
578 | ||
b7922338 | 579 | void write_int(int f,int32 x) |
720b47f2 | 580 | { |
8d9dc9f9 AT |
581 | char b[4]; |
582 | SIVAL(b,0,x); | |
4c36ddbe | 583 | writefd(f,b,4); |
720b47f2 AT |
584 | } |
585 | ||
7a24c346 MP |
586 | |
587 | /* | |
588 | * Note: int64 may actually be a 32-bit type if ./configure couldn't find any | |
589 | * 64-bit types on this platform. | |
590 | */ | |
71c46176 | 591 | void write_longint(int f, int64 x) |
3a6a366f AT |
592 | { |
593 | extern int remote_version; | |
594 | char b[8]; | |
3a6a366f AT |
595 | |
596 | if (remote_version < 16 || x <= 0x7FFFFFFF) { | |
597 | write_int(f, (int)x); | |
598 | return; | |
599 | } | |
600 | ||
8de330a3 | 601 | write_int(f, (int32)0xFFFFFFFF); |
3a6a366f AT |
602 | SIVAL(b,0,(x&0xFFFFFFFF)); |
603 | SIVAL(b,4,((x>>32)&0xFFFFFFFF)); | |
604 | ||
4c36ddbe | 605 | writefd(f,b,8); |
3a6a366f AT |
606 | } |
607 | ||
9dd891bb | 608 | void write_buf(int f,char *buf,size_t len) |
720b47f2 | 609 | { |
4c36ddbe | 610 | writefd(f,buf,len); |
720b47f2 AT |
611 | } |
612 | ||
f0fca04e | 613 | /* write a string to the connection */ |
6e4fb64e | 614 | static void write_sbuf(int f,char *buf) |
f0fca04e AT |
615 | { |
616 | write_buf(f, buf, strlen(buf)); | |
617 | } | |
618 | ||
720b47f2 | 619 | |
182dca5c AT |
620 | void write_byte(int f,unsigned char c) |
621 | { | |
f0fca04e | 622 | write_buf(f,(char *)&c,1); |
182dca5c AT |
623 | } |
624 | ||
7a55d06e MP |
625 | |
626 | ||
9dd891bb | 627 | int read_line(int f, char *buf, size_t maxlen) |
f0fca04e AT |
628 | { |
629 | while (maxlen) { | |
528bfcd7 | 630 | buf[0] = 0; |
f0fca04e | 631 | read_buf(f, buf, 1); |
528bfcd7 | 632 | if (buf[0] == 0) return 0; |
f0fca04e AT |
633 | if (buf[0] == '\n') { |
634 | buf[0] = 0; | |
635 | break; | |
636 | } | |
637 | if (buf[0] != '\r') { | |
638 | buf++; | |
639 | maxlen--; | |
640 | } | |
641 | } | |
642 | if (maxlen == 0) { | |
643 | *buf = 0; | |
644 | return 0; | |
645 | } | |
528bfcd7 | 646 | |
f0fca04e AT |
647 | return 1; |
648 | } | |
649 | ||
650 | ||
651 | void io_printf(int fd, const char *format, ...) | |
652 | { | |
653 | va_list ap; | |
654 | char buf[1024]; | |
655 | int len; | |
656 | ||
657 | va_start(ap, format); | |
8950ac03 | 658 | len = vsnprintf(buf, sizeof(buf), format, ap); |
f0fca04e AT |
659 | va_end(ap); |
660 | ||
65417579 | 661 | if (len < 0) exit_cleanup(RERR_STREAMIO); |
f0fca04e AT |
662 | |
663 | write_sbuf(fd, buf); | |
664 | } | |
8d9dc9f9 AT |
665 | |
666 | ||
667 | /* setup for multiplexing an error stream with the data stream */ | |
668 | void io_start_multiplex_out(int fd) | |
669 | { | |
679e7657 AT |
670 | multiplex_out_fd = fd; |
671 | io_flush(); | |
8d9dc9f9 AT |
672 | io_start_buffering(fd); |
673 | io_multiplexing_out = 1; | |
674 | } | |
675 | ||
676 | /* setup for multiplexing an error stream with the data stream */ | |
677 | void io_start_multiplex_in(int fd) | |
678 | { | |
679e7657 AT |
679 | multiplex_in_fd = fd; |
680 | io_flush(); | |
8d9dc9f9 AT |
681 | io_multiplexing_in = 1; |
682 | } | |
683 | ||
554e0a8d | 684 | /* write an message to the multiplexed error stream */ |
9dd891bb | 685 | int io_multiplex_write(enum logcode code, char *buf, size_t len) |
8d9dc9f9 AT |
686 | { |
687 | if (!io_multiplexing_out) return 0; | |
688 | ||
689 | io_flush(); | |
1b7c47cb | 690 | stats.total_written += (len+4); |
ff41a59f | 691 | mplex_write(multiplex_out_fd, code, buf, len); |
8d9dc9f9 AT |
692 | return 1; |
693 | } | |
694 | ||
554e0a8d AT |
695 | /* stop output multiplexing */ |
696 | void io_multiplexing_close(void) | |
697 | { | |
698 | io_multiplexing_out = 0; | |
699 | } | |
700 |