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 | |
9dd891bb | 52 | static void read_loop(int fd, char *buf, size_t len); |
ff41a59f | 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 | */ |
9dd891bb | 166 | static int read_timeout (int fd, char *buf, size_t 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. */ | |
9dd891bb | 239 | static void read_loop (int fd, char *buf, size_t 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 | */ | |
9dd891bb | 256 | static int read_unbuffered(int fd, char *buf, size_t len) |
8d9dc9f9 AT |
257 | { |
258 | static int remaining; | |
909ce14f | 259 | int tag, ret = 0; |
8d9dc9f9 AT |
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 | ||
909ce14f | 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 | ||
909ce14f MP |
280 | if (tag == MPLEX_BASE) |
281 | continue; | |
8d9dc9f9 AT |
282 | |
283 | tag -= MPLEX_BASE; | |
284 | ||
285 | if (tag != FERROR && tag != FINFO) { | |
909ce14f | 286 | rprintf(FERROR, "unexpected tag %d\n", tag); |
65417579 | 287 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 AT |
288 | } |
289 | ||
909ce14f MP |
290 | if (remaining > sizeof(line) - 1) { |
291 | rprintf(FERROR, "multiplexing overflow %d\n\n", | |
8d9dc9f9 | 292 | remaining); |
65417579 | 293 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 AT |
294 | } |
295 | ||
296 | read_loop(fd, line, remaining); | |
297 | line[remaining] = 0; | |
298 | ||
909ce14f | 299 | rprintf((enum logcode) tag, "%s", line); |
8d9dc9f9 AT |
300 | remaining = 0; |
301 | } | |
302 | ||
303 | return ret; | |
304 | } | |
305 | ||
306 | ||
909ce14f | 307 | |
4c36ddbe AT |
308 | /* do a buffered read from fd. don't return until all N bytes |
309 | have been read. If all N can't be read then exit with an error */ | |
9dd891bb | 310 | static void readfd (int fd, char *buffer, size_t N) |
720b47f2 | 311 | { |
6ba9279f AT |
312 | int ret; |
313 | int total=0; | |
6ba9279f | 314 | |
6ba9279f | 315 | while (total < N) { |
8d9dc9f9 AT |
316 | io_flush(); |
317 | ||
7a55d06e | 318 | ret = read_unbuffered (fd, buffer + total, N-total); |
6ba9279f | 319 | total += ret; |
7f28dbee | 320 | } |
1b7c47cb AT |
321 | |
322 | stats.total_read += total; | |
720b47f2 AT |
323 | } |
324 | ||
325 | ||
b7922338 | 326 | int32 read_int(int f) |
720b47f2 | 327 | { |
4c36ddbe | 328 | char b[4]; |
d730b113 AT |
329 | int32 ret; |
330 | ||
4c36ddbe | 331 | readfd(f,b,4); |
d730b113 AT |
332 | ret = IVAL(b,0); |
333 | if (ret == (int32)0xffffffff) return -1; | |
334 | return ret; | |
720b47f2 AT |
335 | } |
336 | ||
71c46176 | 337 | int64 read_longint(int f) |
3a6a366f AT |
338 | { |
339 | extern int remote_version; | |
71c46176 | 340 | int64 ret; |
3a6a366f AT |
341 | char b[8]; |
342 | ret = read_int(f); | |
71c46176 | 343 | |
8de330a3 AT |
344 | if ((int32)ret != (int32)0xffffffff) { |
345 | return ret; | |
346 | } | |
71c46176 | 347 | |
3bee6733 | 348 | #ifdef NO_INT64 |
9486289c | 349 | rprintf(FERROR,"Integer overflow - attempted 64 bit offset\n"); |
65417579 | 350 | exit_cleanup(RERR_UNSUPPORTED); |
71c46176 AT |
351 | #else |
352 | if (remote_version >= 16) { | |
4c36ddbe | 353 | readfd(f,b,8); |
71c46176 | 354 | ret = IVAL(b,0) | (((int64)IVAL(b,4))<<32); |
3a6a366f | 355 | } |
71c46176 AT |
356 | #endif |
357 | ||
3a6a366f AT |
358 | return ret; |
359 | } | |
360 | ||
9dd891bb | 361 | void read_buf(int f,char *buf,size_t len) |
720b47f2 | 362 | { |
4c36ddbe | 363 | readfd(f,buf,len); |
720b47f2 AT |
364 | } |
365 | ||
9dd891bb | 366 | void read_sbuf(int f,char *buf,size_t len) |
575f2fca | 367 | { |
7a55d06e | 368 | read_buf (f,buf,len); |
575f2fca AT |
369 | buf[len] = 0; |
370 | } | |
371 | ||
182dca5c AT |
372 | unsigned char read_byte(int f) |
373 | { | |
4c36ddbe | 374 | unsigned char c; |
7a55d06e | 375 | read_buf (f, (char *)&c, 1); |
4c36ddbe | 376 | return c; |
182dca5c | 377 | } |
720b47f2 | 378 | |
ae682c3e | 379 | /* write len bytes to fd */ |
9dd891bb | 380 | static void writefd_unbuffered(int fd,char *buf,size_t len) |
720b47f2 | 381 | { |
8d9dc9f9 AT |
382 | int total = 0; |
383 | fd_set w_fds, r_fds; | |
4c36ddbe | 384 | int fd_count, count; |
8d9dc9f9 | 385 | struct timeval tv; |
720b47f2 | 386 | |
90ba34e2 AT |
387 | err_list_push(); |
388 | ||
e44f9a12 AT |
389 | no_flush++; |
390 | ||
4c36ddbe | 391 | while (total < len) { |
8d9dc9f9 AT |
392 | FD_ZERO(&w_fds); |
393 | FD_ZERO(&r_fds); | |
394 | FD_SET(fd,&w_fds); | |
554e0a8d | 395 | fd_count = fd; |
4c36ddbe | 396 | |
554e0a8d AT |
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, | |
08f15335 | 409 | io_error_fd != -1?&r_fds:NULL, |
4c36ddbe | 410 | &w_fds,NULL, |
8cd9fd4e | 411 | &tv); |
4c36ddbe | 412 | |
a57873b7 AT |
413 | if (count == 0) { |
414 | check_timeout(); | |
415 | } | |
416 | ||
4c36ddbe | 417 | if (count <= 0) { |
554e0a8d AT |
418 | if (errno == EBADF) { |
419 | exit_cleanup(RERR_SOCKETIO); | |
420 | } | |
8d9dc9f9 AT |
421 | continue; |
422 | } | |
4c36ddbe | 423 | |
554e0a8d AT |
424 | if (io_error_fd != -1 && FD_ISSET(io_error_fd, &r_fds)) { |
425 | read_error_fd(); | |
426 | } | |
427 | ||
8d9dc9f9 | 428 | if (FD_ISSET(fd, &w_fds)) { |
07b7c86c | 429 | int ret, n = len-total; |
f0359dd0 | 430 | ret = write(fd,buf+total,n); |
4c36ddbe AT |
431 | |
432 | if (ret == -1 && errno == EINTR) { | |
433 | continue; | |
434 | } | |
435 | ||
f0359dd0 AT |
436 | if (ret == -1 && |
437 | (errno == EWOULDBLOCK || errno == EAGAIN)) { | |
e92ee128 | 438 | msleep(1); |
f0359dd0 AT |
439 | continue; |
440 | } | |
441 | ||
4c36ddbe | 442 | if (ret <= 0) { |
ce6c7c63 MP |
443 | rprintf(FERROR, |
444 | "error writing %d unbuffered bytes" | |
445 | " - exiting: %s\n", len, | |
446 | strerror(errno)); | |
65417579 | 447 | exit_cleanup(RERR_STREAMIO); |
4c36ddbe AT |
448 | } |
449 | ||
ef5d23eb DD |
450 | /* Sleep after writing to limit I/O bandwidth */ |
451 | if (bwlimit) | |
452 | { | |
453 | tv.tv_sec = 0; | |
454 | tv.tv_usec = ret * 1000 / bwlimit; | |
455 | while (tv.tv_usec > 1000000) | |
456 | { | |
457 | tv.tv_sec++; | |
458 | tv.tv_usec -= 1000000; | |
459 | } | |
460 | select(0, NULL, NULL, NULL, &tv); | |
461 | } | |
462 | ||
4c36ddbe | 463 | total += ret; |
a800434a | 464 | |
4c36ddbe AT |
465 | if (io_timeout) |
466 | last_io = time(NULL); | |
8d9dc9f9 | 467 | } |
4c36ddbe | 468 | } |
e44f9a12 AT |
469 | |
470 | no_flush--; | |
720b47f2 AT |
471 | } |
472 | ||
8d9dc9f9 | 473 | |
d6dead6b AT |
474 | static char *io_buffer; |
475 | static int io_buffer_count; | |
476 | ||
477 | void io_start_buffering(int fd) | |
478 | { | |
8d9dc9f9 | 479 | if (io_buffer) return; |
679e7657 | 480 | multiplex_out_fd = fd; |
ff41a59f | 481 | io_buffer = (char *)malloc(IO_BUFFER_SIZE); |
d6dead6b AT |
482 | if (!io_buffer) out_of_memory("writefd"); |
483 | io_buffer_count = 0; | |
ff41a59f AT |
484 | } |
485 | ||
486 | /* write an message to a multiplexed stream. If this fails then rsync | |
487 | exits */ | |
9dd891bb | 488 | static void mplex_write(int fd, enum logcode code, char *buf, size_t len) |
ff41a59f AT |
489 | { |
490 | char buffer[4096]; | |
491 | int n = len; | |
8d9dc9f9 | 492 | |
ff41a59f AT |
493 | SIVAL(buffer, 0, ((MPLEX_BASE + (int)code)<<24) + len); |
494 | ||
6d7b6081 AT |
495 | if (n > (sizeof(buffer)-4)) { |
496 | n = sizeof(buffer)-4; | |
ff41a59f AT |
497 | } |
498 | ||
499 | memcpy(&buffer[4], buf, n); | |
500 | writefd_unbuffered(fd, buffer, n+4); | |
501 | ||
502 | len -= n; | |
503 | buf += n; | |
504 | ||
6d7b6081 AT |
505 | if (len) { |
506 | writefd_unbuffered(fd, buf, len); | |
507 | } | |
d6dead6b AT |
508 | } |
509 | ||
ff41a59f | 510 | |
8d9dc9f9 | 511 | void io_flush(void) |
d6dead6b | 512 | { |
679e7657 | 513 | int fd = multiplex_out_fd; |
90ba34e2 AT |
514 | |
515 | err_list_push(); | |
516 | ||
e44f9a12 | 517 | if (!io_buffer_count || no_flush) return; |
8d9dc9f9 AT |
518 | |
519 | if (io_multiplexing_out) { | |
0f3203c3 | 520 | mplex_write(fd, FNONE, io_buffer, io_buffer_count); |
8d9dc9f9 | 521 | } else { |
4c36ddbe | 522 | writefd_unbuffered(fd, io_buffer, io_buffer_count); |
d6dead6b | 523 | } |
8d9dc9f9 AT |
524 | io_buffer_count = 0; |
525 | } | |
526 | ||
0ba48136 MP |
527 | |
528 | /* XXX: fd is ignored, which seems a little strange. */ | |
8d9dc9f9 AT |
529 | void io_end_buffering(int fd) |
530 | { | |
531 | io_flush(); | |
532 | if (!io_multiplexing_out) { | |
ff41a59f | 533 | free(io_buffer); |
8d9dc9f9 AT |
534 | io_buffer = NULL; |
535 | } | |
d6dead6b AT |
536 | } |
537 | ||
9dd891bb | 538 | static void writefd(int fd,char *buf,size_t len) |
d6dead6b | 539 | { |
1b7c47cb AT |
540 | stats.total_written += len; |
541 | ||
90ba34e2 AT |
542 | err_list_push(); |
543 | ||
554e0a8d | 544 | if (!io_buffer || fd != multiplex_out_fd) { |
4c36ddbe AT |
545 | writefd_unbuffered(fd, buf, len); |
546 | return; | |
547 | } | |
d6dead6b AT |
548 | |
549 | while (len) { | |
550 | int n = MIN(len, IO_BUFFER_SIZE-io_buffer_count); | |
551 | if (n > 0) { | |
552 | memcpy(io_buffer+io_buffer_count, buf, n); | |
553 | buf += n; | |
554 | len -= n; | |
555 | io_buffer_count += n; | |
556 | } | |
557 | ||
8d9dc9f9 | 558 | if (io_buffer_count == IO_BUFFER_SIZE) io_flush(); |
d6dead6b | 559 | } |
d6dead6b | 560 | } |
720b47f2 AT |
561 | |
562 | ||
b7922338 | 563 | void write_int(int f,int32 x) |
720b47f2 | 564 | { |
8d9dc9f9 AT |
565 | char b[4]; |
566 | SIVAL(b,0,x); | |
4c36ddbe | 567 | writefd(f,b,4); |
720b47f2 AT |
568 | } |
569 | ||
7a24c346 MP |
570 | |
571 | /* | |
572 | * Note: int64 may actually be a 32-bit type if ./configure couldn't find any | |
573 | * 64-bit types on this platform. | |
574 | */ | |
71c46176 | 575 | void write_longint(int f, int64 x) |
3a6a366f AT |
576 | { |
577 | extern int remote_version; | |
578 | char b[8]; | |
3a6a366f AT |
579 | |
580 | if (remote_version < 16 || x <= 0x7FFFFFFF) { | |
581 | write_int(f, (int)x); | |
582 | return; | |
583 | } | |
584 | ||
8de330a3 | 585 | write_int(f, (int32)0xFFFFFFFF); |
3a6a366f AT |
586 | SIVAL(b,0,(x&0xFFFFFFFF)); |
587 | SIVAL(b,4,((x>>32)&0xFFFFFFFF)); | |
588 | ||
4c36ddbe | 589 | writefd(f,b,8); |
3a6a366f AT |
590 | } |
591 | ||
9dd891bb | 592 | void write_buf(int f,char *buf,size_t len) |
720b47f2 | 593 | { |
4c36ddbe | 594 | writefd(f,buf,len); |
720b47f2 AT |
595 | } |
596 | ||
f0fca04e | 597 | /* write a string to the connection */ |
6e4fb64e | 598 | static void write_sbuf(int f,char *buf) |
f0fca04e AT |
599 | { |
600 | write_buf(f, buf, strlen(buf)); | |
601 | } | |
602 | ||
720b47f2 | 603 | |
182dca5c AT |
604 | void write_byte(int f,unsigned char c) |
605 | { | |
f0fca04e | 606 | write_buf(f,(char *)&c,1); |
182dca5c AT |
607 | } |
608 | ||
7a55d06e MP |
609 | |
610 | ||
9dd891bb | 611 | int read_line(int f, char *buf, size_t maxlen) |
f0fca04e AT |
612 | { |
613 | while (maxlen) { | |
528bfcd7 | 614 | buf[0] = 0; |
f0fca04e | 615 | read_buf(f, buf, 1); |
528bfcd7 | 616 | if (buf[0] == 0) return 0; |
f0fca04e AT |
617 | if (buf[0] == '\n') { |
618 | buf[0] = 0; | |
619 | break; | |
620 | } | |
621 | if (buf[0] != '\r') { | |
622 | buf++; | |
623 | maxlen--; | |
624 | } | |
625 | } | |
626 | if (maxlen == 0) { | |
627 | *buf = 0; | |
628 | return 0; | |
629 | } | |
528bfcd7 | 630 | |
f0fca04e AT |
631 | return 1; |
632 | } | |
633 | ||
634 | ||
635 | void io_printf(int fd, const char *format, ...) | |
636 | { | |
637 | va_list ap; | |
638 | char buf[1024]; | |
639 | int len; | |
640 | ||
641 | va_start(ap, format); | |
8950ac03 | 642 | len = vsnprintf(buf, sizeof(buf), format, ap); |
f0fca04e AT |
643 | va_end(ap); |
644 | ||
65417579 | 645 | if (len < 0) exit_cleanup(RERR_STREAMIO); |
f0fca04e AT |
646 | |
647 | write_sbuf(fd, buf); | |
648 | } | |
8d9dc9f9 AT |
649 | |
650 | ||
651 | /* setup for multiplexing an error stream with the data stream */ | |
652 | void io_start_multiplex_out(int fd) | |
653 | { | |
679e7657 AT |
654 | multiplex_out_fd = fd; |
655 | io_flush(); | |
8d9dc9f9 AT |
656 | io_start_buffering(fd); |
657 | io_multiplexing_out = 1; | |
658 | } | |
659 | ||
660 | /* setup for multiplexing an error stream with the data stream */ | |
661 | void io_start_multiplex_in(int fd) | |
662 | { | |
679e7657 AT |
663 | multiplex_in_fd = fd; |
664 | io_flush(); | |
8d9dc9f9 AT |
665 | io_multiplexing_in = 1; |
666 | } | |
667 | ||
554e0a8d | 668 | /* write an message to the multiplexed error stream */ |
9dd891bb | 669 | int io_multiplex_write(enum logcode code, char *buf, size_t len) |
8d9dc9f9 AT |
670 | { |
671 | if (!io_multiplexing_out) return 0; | |
672 | ||
673 | io_flush(); | |
1b7c47cb | 674 | stats.total_written += (len+4); |
ff41a59f | 675 | mplex_write(multiplex_out_fd, code, buf, len); |
8d9dc9f9 AT |
676 | return 1; |
677 | } | |
678 | ||
554e0a8d AT |
679 | /* stop output multiplexing */ |
680 | void io_multiplexing_close(void) | |
681 | { | |
682 | io_multiplexing_out = 0; | |
683 | } | |
684 |