Commit | Line | Data |
---|---|---|
0f78b815 WD |
1 | /* |
2 | * Socket and pipe I/O utilities used in rsync. | |
d62bcc17 | 3 | * |
0f78b815 WD |
4 | * Copyright (C) 1996-2001 Andrew Tridgell |
5 | * Copyright (C) 1996 Paul Mackerras | |
6 | * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org> | |
b3bf9b9d | 7 | * Copyright (C) 2003-2009 Wayne Davison |
d62bcc17 | 8 | * |
880da007 | 9 | * This program is free software; you can redistribute it and/or modify |
8e41b68e WD |
10 | * it under the terms of the GNU General Public License as published by |
11 | * the Free Software Foundation; either version 3 of the License, or | |
12 | * (at your option) any later version. | |
d62bcc17 | 13 | * |
880da007 MP |
14 | * This program is distributed in the hope that it will be useful, |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
d62bcc17 | 18 | * |
e7c67065 | 19 | * You should have received a copy of the GNU General Public License along |
4fd842f9 | 20 | * with this program; if not, visit the http://fsf.org website. |
880da007 | 21 | */ |
720b47f2 | 22 | |
0f78b815 WD |
23 | /* Rsync provides its own multiplexing system, which is used to send |
24 | * stderr and stdout over a single socket. | |
87ee2481 MP |
25 | * |
26 | * For historical reasons this is off during the start of the | |
27 | * connection, but it's switched on quite early using | |
0f78b815 | 28 | * io_start_multiplex_out() and io_start_multiplex_in(). */ |
720b47f2 | 29 | |
720b47f2 | 30 | #include "rsync.h" |
1b42f628 | 31 | #include "ifuncs.h" |
5dd14f0c | 32 | #include "inums.h" |
720b47f2 | 33 | |
880da007 | 34 | /** If no timeout is specified then use a 60 second select timeout */ |
8cd9fd4e AT |
35 | #define SELECT_TIMEOUT 60 |
36 | ||
7a55d06e | 37 | extern int bwlimit; |
71e58630 | 38 | extern size_t bwlimit_writemax; |
6ba9279f | 39 | extern int io_timeout; |
d17e1dd2 WD |
40 | extern int am_server; |
41 | extern int am_daemon; | |
42 | extern int am_sender; | |
98f8c9a5 | 43 | extern int am_generator; |
20caffd2 | 44 | extern int msgs2stderr; |
3ea6e0e7 | 45 | extern int inc_recurse; |
8ef246e0 | 46 | extern int io_error; |
e626b29e | 47 | extern int eol_nulls; |
8ef246e0 | 48 | extern int flist_eof; |
ce827c3e WD |
49 | extern int file_total; |
50 | extern int file_old_total; | |
7f9bf6b7 | 51 | extern int list_only; |
3b0a30eb | 52 | extern int read_batch; |
ba525f77 | 53 | extern int protect_args; |
b9f592fb WD |
54 | extern int checksum_seed; |
55 | extern int protocol_version; | |
47c11975 | 56 | extern int remove_source_files; |
cdf236aa | 57 | extern int preserve_hard_links; |
7a7810aa | 58 | extern BOOL extra_flist_sending_enabled; |
a800434a | 59 | extern struct stats stats; |
19531e1f | 60 | extern struct file_list *cur_flist; |
332cf6df | 61 | #ifdef ICONV_OPTION |
ba525f77 | 62 | extern int filesfrom_convert; |
332cf6df WD |
63 | extern iconv_t ic_send, ic_recv; |
64 | #endif | |
720b47f2 | 65 | |
93465f51 WD |
66 | int csum_length = SHORT_SUM_LENGTH; /* initial value */ |
67 | int allowed_lull = 0; | |
9e2409ab | 68 | int ignore_timeout = 0; |
b9f592fb | 69 | int batch_fd = -1; |
04c722d5 | 70 | int msgdone_cnt = 0; |
20caffd2 | 71 | int forward_flist_data = 0; |
805edf9d | 72 | |
cb2e1f18 | 73 | /* Ignore an EOF error if non-zero. See whine_about_eof(). */ |
574c2500 | 74 | int kluge_around_eof = 0; |
7a55d06e | 75 | |
cdf236aa WD |
76 | int sock_f_in = -1; |
77 | int sock_f_out = -1; | |
7a55d06e | 78 | |
20caffd2 WD |
79 | static struct { |
80 | xbuf in, out, msg; | |
81 | int in_fd; | |
82 | int out_fd; /* Both "out" and "msg" go to this fd. */ | |
83 | BOOL in_multiplexed; | |
84 | unsigned out_empty_len; | |
85 | size_t raw_data_header_pos; /* in the out xbuf */ | |
86 | size_t raw_flushing_ends_before; /* in the out xbuf */ | |
87 | size_t raw_input_ends_before; /* in the in xbuf */ | |
88 | } iobuf = { .in_fd = -1, .out_fd = -1 }; | |
8ef246e0 | 89 | |
3b0a30eb WD |
90 | static time_t last_io_in; |
91 | static time_t last_io_out; | |
1f75bb10 | 92 | |
b9f592fb WD |
93 | static int write_batch_monitor_in = -1; |
94 | static int write_batch_monitor_out = -1; | |
95 | ||
20caffd2 | 96 | static int ff_forward_fd = -1; |
ba525f77 | 97 | static char ff_lastchar; |
332cf6df | 98 | #ifdef ICONV_OPTION |
ba525f77 | 99 | static xbuf iconv_buf = EMPTY_XBUF; |
332cf6df | 100 | #endif |
3b0a30eb | 101 | static int select_timeout = SELECT_TIMEOUT; |
d6081c82 WD |
102 | static int active_filecnt = 0; |
103 | static OFF_T active_bytecnt = 0; | |
7f9bf6b7 | 104 | static int first_message = 1; |
720b47f2 | 105 | |
351e23ad WD |
106 | static char int_byte_extra[64] = { |
107 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (00 - 3F)/4 */ | |
108 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (40 - 7F)/4 */ | |
109 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* (80 - BF)/4 */ | |
110 | 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 5, 6, /* (C0 - FF)/4 */ | |
482f48cc WD |
111 | }; |
112 | ||
20caffd2 WD |
113 | #define IN_MULTIPLEXED (iobuf.in_multiplexed) |
114 | #define OUT_MULTIPLEXED (iobuf.out_empty_len != 0) | |
29349024 | 115 | |
20caffd2 WD |
116 | #define PIO_NEED_INPUT (1<<0) /* The *_NEED_* flags are mutually exclusive. */ |
117 | #define PIO_NEED_OUTROOM (1<<1) | |
118 | #define PIO_NEED_MSGROOM (1<<2) | |
ff41a59f | 119 | |
20caffd2 | 120 | #define PIO_CONSUME_INPUT (1<<4) /* Must becombined with PIO_NEED_INPUT. */ |
d17e1dd2 | 121 | |
20caffd2 WD |
122 | #define PIO_INPUT_AND_CONSUME (PIO_NEED_INPUT | PIO_CONSUME_INPUT) |
123 | #define PIO_NEED_FLAGS (PIO_NEED_INPUT | PIO_NEED_OUTROOM | PIO_NEED_MSGROOM) | |
d17e1dd2 | 124 | |
20caffd2 WD |
125 | #define REMOTE_OPTION_ERROR "rsync: on remote machine: -" |
126 | #define REMOTE_OPTION_ERROR2 ": unknown option" | |
08c88178 | 127 | |
20caffd2 | 128 | #define FILESFROM_BUFLEN 2048 |
d17e1dd2 | 129 | |
20caffd2 | 130 | enum festatus { FES_SUCCESS, FES_REDO, FES_NO_SEND }; |
29349024 | 131 | |
20caffd2 | 132 | static flist_ndx_list redo_list, hlink_list; |
29349024 | 133 | |
20caffd2 | 134 | static void sleep_for_bwlimit(int bytes_written); |
29349024 | 135 | |
8d9dc9f9 AT |
136 | static void check_timeout(void) |
137 | { | |
138 | time_t t; | |
90ba34e2 | 139 | |
9e2409ab | 140 | if (!io_timeout || ignore_timeout) |
d17e1dd2 | 141 | return; |
8d9dc9f9 | 142 | |
3b0a30eb WD |
143 | if (!last_io_in) { |
144 | last_io_in = time(NULL); | |
8d9dc9f9 AT |
145 | return; |
146 | } | |
147 | ||
148 | t = time(NULL); | |
149 | ||
3b0a30eb | 150 | if (t - last_io_in >= io_timeout) { |
0adb99b9 | 151 | if (!am_server && !am_daemon) { |
4ccfd96c | 152 | rprintf(FERROR, "io timeout after %d seconds -- exiting\n", |
3b0a30eb | 153 | (int)(t-last_io_in)); |
0adb99b9 | 154 | } |
65417579 | 155 | exit_cleanup(RERR_TIMEOUT); |
8d9dc9f9 AT |
156 | } |
157 | } | |
158 | ||
20caffd2 WD |
159 | /* It's almost always an error to get an EOF when we're trying to read from the |
160 | * network, because the protocol is (for the most part) self-terminating. | |
161 | * | |
162 | * There is one case for the receiver when it is at the end of the transfer | |
163 | * (hanging around reading any keep-alive packets that might come its way): if | |
164 | * the sender dies before the generator's kill-signal comes through, we can end | |
165 | * up here needing to loop until the kill-signal arrives. In this situation, | |
166 | * kluge_around_eof will be < 0. | |
167 | * | |
168 | * There is another case for older protocol versions (< 24) where the module | |
169 | * listing was not terminated, so we must ignore an EOF error in that case and | |
170 | * exit. In this situation, kluge_around_eof will be > 0. */ | |
171 | static NORETURN void whine_about_eof(int fd) | |
d17e1dd2 | 172 | { |
20caffd2 WD |
173 | if (kluge_around_eof && fd == sock_f_in) { |
174 | int i; | |
175 | if (kluge_around_eof > 0) | |
176 | exit_cleanup(0); | |
177 | /* If we're still here after 10 seconds, exit with an error. */ | |
178 | for (i = 10*1000/20; i--; ) | |
179 | msleep(20); | |
180 | } | |
d17e1dd2 | 181 | |
20caffd2 WD |
182 | rprintf(FERROR, RSYNC_NAME ": connection unexpectedly closed " |
183 | "(%s bytes received so far) [%s]\n", | |
184 | big_num(stats.total_read), who_am_i()); | |
d17e1dd2 | 185 | |
20caffd2 | 186 | exit_cleanup(RERR_STREAMIO); |
554e0a8d AT |
187 | } |
188 | ||
20caffd2 WD |
189 | /* Do a safe read, handling any needed looping and error handling. |
190 | * Returns the count of the bytes read, which will only be different | |
191 | * from "len" if we encountered an EOF. This routine is not used on | |
192 | * the socket except very early in the transfer. */ | |
193 | static size_t safe_read(int fd, char *buf, size_t len) | |
0b789446 | 194 | { |
20caffd2 WD |
195 | size_t got; |
196 | int n; | |
0b789446 | 197 | |
20caffd2 | 198 | assert(fd != iobuf.in_fd); |
0b789446 | 199 | |
20caffd2 WD |
200 | n = read(fd, buf, len); |
201 | if ((size_t)n == len || n == 0) { | |
202 | if (DEBUG_GTE(IO, 2)) | |
203 | rprintf(FINFO, "[%s] safe_read(%d)=%ld\n", who_am_i(), fd, (long)n); | |
204 | return n; | |
3be97bf9 | 205 | } |
20caffd2 WD |
206 | if (n < 0) { |
207 | if (errno != EINTR && errno != EWOULDBLOCK && errno != EAGAIN) { | |
208 | read_failed: | |
209 | rsyserr(FERROR, errno, "safe_read failed to read %ld bytes [%s]", | |
210 | (long)len, who_am_i()); | |
211 | exit_cleanup(RERR_STREAMIO); | |
212 | } | |
213 | got = 0; | |
214 | } else | |
215 | got = n; | |
3be97bf9 | 216 | |
20caffd2 WD |
217 | while (1) { |
218 | struct timeval tv; | |
219 | fd_set r_fds, e_fds; | |
220 | int cnt; | |
7f9bf6b7 | 221 | |
20caffd2 WD |
222 | FD_ZERO(&r_fds); |
223 | FD_SET(fd, &r_fds); | |
224 | FD_ZERO(&e_fds); | |
225 | FD_SET(fd, &e_fds); | |
226 | tv.tv_sec = select_timeout; | |
227 | tv.tv_usec = 0; | |
7f9bf6b7 | 228 | |
20caffd2 WD |
229 | cnt = select(fd+1, &r_fds, NULL, &e_fds, &tv); |
230 | if (cnt <= 0) { | |
231 | if (cnt < 0 && errno == EBADF) { | |
232 | rsyserr(FERROR, errno, "safe_read select failed [%s]", | |
233 | who_am_i()); | |
234 | exit_cleanup(RERR_FILEIO); | |
235 | } | |
236 | check_timeout(); | |
237 | continue; | |
238 | } | |
7f9bf6b7 | 239 | |
20caffd2 WD |
240 | /*if (FD_ISSET(fd, &e_fds)) |
241 | rprintf(FINFO, "select exception on fd %d\n", fd); */ | |
7f9bf6b7 | 242 | |
20caffd2 WD |
243 | if (FD_ISSET(fd, &r_fds)) { |
244 | n = read(fd, buf + got, len - got); | |
245 | if (DEBUG_GTE(IO, 2)) | |
246 | rprintf(FINFO, "[%s] safe_read(%d)=%ld\n", who_am_i(), fd, (long)n); | |
247 | if (n == 0) | |
248 | break; | |
249 | if (n < 0) { | |
250 | if (errno == EINTR) | |
251 | continue; | |
252 | goto read_failed; | |
253 | } | |
254 | if ((got += (size_t)n) == len) | |
255 | break; | |
256 | } | |
7f9bf6b7 | 257 | } |
20caffd2 WD |
258 | |
259 | return got; | |
7f9bf6b7 WD |
260 | } |
261 | ||
20caffd2 | 262 | static const char *what_fd_is(int fd) |
d6081c82 | 263 | { |
20caffd2 | 264 | static char buf[20]; |
d6081c82 | 265 | |
20caffd2 WD |
266 | if (fd == sock_f_out) |
267 | return "socket"; | |
268 | else if (fd == iobuf.out_fd) | |
269 | return "message fd"; | |
270 | else if (fd == batch_fd) | |
271 | return "batch file"; | |
272 | else { | |
273 | snprintf(buf, sizeof buf, "fd %d", fd); | |
274 | return buf; | |
275 | } | |
d6081c82 WD |
276 | } |
277 | ||
20caffd2 WD |
278 | /* Do a safe write, handling any needed looping and error handling. |
279 | * Returns only if everything was successfully written. This routine | |
280 | * is not used on the socket except very early in the transfer. */ | |
281 | static void safe_write(int fd, const char *buf, size_t len) | |
d17e1dd2 | 282 | { |
20caffd2 | 283 | int n; |
ee6e80c7 | 284 | |
20caffd2 | 285 | assert(fd != iobuf.out_fd); |
332cf6df | 286 | |
20caffd2 WD |
287 | n = write(fd, buf, len); |
288 | if ((size_t)n == len) | |
289 | return; | |
290 | if (n < 0) { | |
291 | if (errno != EINTR && errno != EWOULDBLOCK && errno != EAGAIN) { | |
292 | write_failed: | |
293 | rsyserr(FERROR, errno, | |
294 | "safe_write failed to write %ld bytes to %s [%s]", | |
295 | (long)len, what_fd_is(fd), who_am_i()); | |
296 | exit_cleanup(RERR_STREAMIO); | |
ee6e80c7 | 297 | } |
20caffd2 WD |
298 | } else { |
299 | buf += n; | |
300 | len -= n; | |
301 | } | |
ee6e80c7 | 302 | |
20caffd2 WD |
303 | while (len) { |
304 | struct timeval tv; | |
305 | fd_set w_fds; | |
306 | int cnt; | |
3be97bf9 | 307 | |
20caffd2 WD |
308 | FD_ZERO(&w_fds); |
309 | FD_SET(fd, &w_fds); | |
310 | tv.tv_sec = select_timeout; | |
311 | tv.tv_usec = 0; | |
17a4977b | 312 | |
20caffd2 WD |
313 | cnt = select(fd + 1, NULL, &w_fds, NULL, &tv); |
314 | if (cnt <= 0) { | |
315 | if (cnt < 0 && errno == EBADF) { | |
316 | rsyserr(FERROR, errno, "safe_write select failed on %s [%s]", | |
317 | what_fd_is(fd), who_am_i()); | |
318 | exit_cleanup(RERR_FILEIO); | |
319 | } | |
320 | check_timeout(); | |
321 | continue; | |
322 | } | |
d17e1dd2 | 323 | |
20caffd2 WD |
324 | if (FD_ISSET(fd, &w_fds)) { |
325 | n = write(fd, buf, len); | |
326 | if (n < 0) { | |
327 | if (errno == EINTR) | |
328 | continue; | |
329 | goto write_failed; | |
330 | } | |
331 | buf += n; | |
332 | len -= n; | |
333 | } | |
37f35d89 | 334 | } |
37f35d89 WD |
335 | } |
336 | ||
20caffd2 WD |
337 | /* This is only called when files-from data is known to be available. We read |
338 | * a chunk of data and put it into the output buffer. */ | |
339 | static void forward_filesfrom_data(void) | |
155d9206 | 340 | { |
20caffd2 WD |
341 | char buf[FILESFROM_BUFLEN]; |
342 | int len; | |
343 | xbuf x; | |
344 | ||
345 | INIT_CONST_XBUF(x, buf); | |
346 | ||
347 | len = read(ff_forward_fd, x.buf, x.size); | |
348 | if (len <= 0) { | |
349 | if (len == 0 || errno != EINTR) { | |
350 | /* Send end-of-file marker */ | |
351 | write_buf(iobuf.out_fd, "\0\0", ff_lastchar ? 2 : 1); | |
352 | ff_forward_fd = -1; | |
353 | if (protocol_version < 31) | |
354 | io_start_multiplex_out(iobuf.out_fd); | |
355 | } | |
0b789446 | 356 | return; |
20caffd2 | 357 | } |
554e0a8d | 358 | |
20caffd2 WD |
359 | if (DEBUG_GTE(IO, 2)) |
360 | rprintf(FINFO, "[%s] files-from read=%ld\n", who_am_i(), (long)len); | |
554e0a8d | 361 | |
20caffd2 WD |
362 | if (!eol_nulls) { |
363 | char *s = x.buf + len; | |
364 | /* Transform CR and/or LF into '\0' */ | |
365 | while (s-- > x.buf) { | |
366 | if (*s == '\n' || *s == '\r') | |
367 | *s = '\0'; | |
368 | } | |
369 | } | |
370 | if (ff_lastchar) | |
371 | x.pos = 0; | |
372 | else { | |
373 | char *s = x.buf; | |
374 | /* Last buf ended with a '\0', so don't let this buf start with one. */ | |
375 | while (len && *s == '\0') | |
376 | s++, len--; | |
377 | x.pos = s - x.buf; | |
378 | } | |
379 | if (len) { | |
380 | char *f = x.buf + x.pos; | |
381 | char *t = f; /* Keep any non-zero offset to avoid iconv reset. */ | |
382 | char *eob = f + len; | |
383 | /* Eliminate any multi-'\0' runs. */ | |
384 | while (f != eob) { | |
385 | if (!(*t++ = *f++)) { | |
386 | while (f != eob && !*f) | |
387 | f++, len--; | |
388 | } | |
389 | } | |
390 | ff_lastchar = f[-1]; | |
391 | } | |
ba525f77 | 392 | #ifdef ICONV_OPTION |
20caffd2 WD |
393 | if (filesfrom_convert) { |
394 | /* TODO would it help to translate each string between nulls separately? */ | |
395 | x.len = len; | |
396 | iconvbufs(ic_send, &x, &iobuf.out, ICB_INCLUDE_BAD|ICB_INCLUDE_INCOMPLETE|ICB_CIRCULAR_OUT); | |
397 | } else | |
ba525f77 | 398 | #endif |
20caffd2 WD |
399 | if (len) { |
400 | /* This will not circle back to perform_io() because we only get | |
401 | * called when there is plenty of room in the output buffer. */ | |
402 | write_buf(iobuf.out_fd, x.buf, len); | |
403 | } | |
56014c8c | 404 | } |
720b47f2 | 405 | |
20caffd2 WD |
406 | /* Perform buffered input and output until specified conditions are met. When |
407 | * given a "needed" read requirement, we'll return without doing any I/O if the | |
408 | * iobuf.in bytes are already available. When reading, we'll read as many | |
409 | * bytes as we can into the buffer, and return as soon as we meet the minimum | |
410 | * read requirement. When given a "needed" write requirement, we'll return | |
411 | * without doing any I/O if that many bytes will fit in the output buffer (we | |
412 | * check either iobuf.out or iobuf.msg, depending on the flags). When writing, | |
413 | * we write out as much as we can, and return as soon as the given free-space | |
414 | * requirement is available. | |
880da007 | 415 | * |
20caffd2 WD |
416 | * The iobuf.out and iobuf.msg buffers are circular, so some writes into them |
417 | * will need to be split when the data needs to wrap around to the start. In | |
418 | * order to help make this easier for some operations (such as the use of | |
419 | * SIVAL() into the buffer) the buffers MUST have 4 bytes of overflow space at | |
420 | * the end that is not not counted in the "size". The iobuf.in buffer is not | |
421 | * (currently) circular. To facilitate the handling of MSG_DATA bytes as they | |
422 | * are read-from/written-into the buffers, see the three raw_* iobuf vars. | |
cb2e1f18 | 423 | * |
20caffd2 WD |
424 | * When writing, we flush data in the following priority order: |
425 | * | |
426 | * 1. Finish writing any in-progress MSG_DATA sequence from iobuf.out. | |
427 | * | |
428 | * 2. Write out all the messages from the message buf (if iobuf.msg is active). | |
429 | * Yes, this means that a PIO_NEED_OUTROOM call will completely flush any | |
430 | * messages before getting to the iobuf.out flushing (except for rule 1). | |
431 | * | |
432 | * 3. Write out the raw data from iobuf.out, possibly filling in the multiplexed | |
433 | * MSG_DATA header that was pre-allocated (when output is multiplexed). | |
434 | * | |
435 | * TODO: items for possible future work: | |
436 | * | |
437 | * - Make this routine able to read the generator-to-receiver batch flow? | |
438 | * | |
439 | * - Make the input buffer circular? | |
440 | * | |
441 | * Unlike the old routines that this replaces, it is OK to read ahead as far as | |
442 | * we can because the read_a_msg() routine now reads its bytes out of the input | |
443 | * buffer. In the old days, only raw data was in the input buffer, and any | |
444 | * unused raw data in the buf would prevent the reading of socket data. */ | |
445 | static char *perform_io(size_t needed, int flags) | |
7a55d06e | 446 | { |
20caffd2 WD |
447 | fd_set r_fds, e_fds, w_fds; |
448 | struct timeval tv; | |
449 | int cnt, max_fd; | |
450 | size_t empty_buf_len = 0; | |
451 | xbuf *out; | |
452 | char *data; | |
453 | ||
454 | if (iobuf.in.len == 0 && iobuf.in.pos != 0) { | |
455 | if (iobuf.raw_input_ends_before) | |
456 | iobuf.raw_input_ends_before -= iobuf.in.pos; | |
457 | iobuf.in.pos = 0; | |
574c2500 | 458 | } |
3151cbae | 459 | |
20caffd2 WD |
460 | switch (flags & PIO_NEED_FLAGS) { |
461 | case PIO_NEED_INPUT: | |
462 | if (DEBUG_GTE(IO, 3)) { | |
463 | rprintf(FINFO, "[%s] perform_io(%ld, %sinput)\n", | |
464 | who_am_i(), (long)needed, flags & PIO_CONSUME_INPUT ? "consume&" : ""); | |
465 | } | |
00bdf899 | 466 | |
20caffd2 WD |
467 | /* Make sure the input buffer is big enough to hold "needed" bytes. |
468 | * Also make sure it will fit in the free space at the end, or | |
469 | * else we need to shift some bytes. */ | |
470 | if (needed && iobuf.in.size < needed) { | |
471 | if (!(iobuf.in.buf = realloc_array(iobuf.in.buf, char, needed))) | |
472 | out_of_memory("perform_io"); | |
473 | if (DEBUG_GTE(IO, 4)) { | |
474 | rprintf(FINFO, "[%s] resized input buffer from %d to %d bytes.\n", | |
475 | who_am_i(), iobuf.in.size, needed); | |
476 | } | |
477 | iobuf.in.size = needed; | |
478 | } | |
479 | if (iobuf.in.size - iobuf.in.pos < needed | |
480 | || (iobuf.in.len < needed && iobuf.in.len < 1024 | |
481 | && iobuf.in.size - (iobuf.in.pos + iobuf.in.len) < 1024)) { | |
482 | memmove(iobuf.in.buf, iobuf.in.buf + iobuf.in.pos, iobuf.in.len); | |
483 | if (DEBUG_GTE(IO, 4)) { | |
484 | rprintf(FINFO, | |
485 | "[%s] moved %d bytes from %d to 0 in the input buffer (size=%d, needed=%d).\n", | |
486 | who_am_i(), iobuf.in.len, iobuf.in.pos, iobuf.in.size, needed); | |
487 | } | |
488 | if (iobuf.raw_input_ends_before) | |
489 | iobuf.raw_input_ends_before -= iobuf.in.pos; | |
490 | iobuf.in.pos = 0; | |
491 | } | |
492 | break; | |
720b47f2 | 493 | |
20caffd2 WD |
494 | case PIO_NEED_OUTROOM: |
495 | /* We never resize the circular output buffer. */ | |
496 | if (iobuf.out.size - iobuf.out_empty_len < needed) { | |
497 | fprintf(stderr, "need to write %ld bytes, iobuf.out.buf is only %ld bytes.\n", | |
498 | (long)needed, (long)(iobuf.out.size - iobuf.out_empty_len)); | |
499 | exit_cleanup(RERR_PROTOCOL); | |
500 | } | |
4c36ddbe | 501 | |
20caffd2 WD |
502 | if (DEBUG_GTE(IO, 3)) { |
503 | rprintf(FINFO, "[%s] perform_io(%ld, outroom) needs to flush %ld\n", | |
504 | who_am_i(), (long)needed, | |
505 | iobuf.out.len > iobuf.out.size - needed | |
506 | ? (long)iobuf.out.len - (iobuf.out.size - needed) : 0L); | |
507 | } | |
508 | break; | |
ea2111d1 | 509 | |
20caffd2 WD |
510 | case PIO_NEED_MSGROOM: |
511 | /* We never resize the circular message buffer. */ | |
512 | if (iobuf.msg.size < needed) { | |
513 | fprintf(stderr, "need to write %ld bytes, iobuf.msg.buf is only %ld bytes.\n", | |
514 | (long)needed, (long)iobuf.msg.size); | |
515 | exit_cleanup(RERR_PROTOCOL); | |
516 | } | |
517 | ||
518 | if (DEBUG_GTE(IO, 3)) { | |
519 | rprintf(FINFO, "[%s] perform_io(%ld, msgroom) needs to flush %ld\n", | |
520 | who_am_i(), (long)needed, | |
521 | iobuf.out.len > iobuf.msg.size - needed | |
522 | ? (long)iobuf.out.len - (iobuf.msg.size - needed) : 0L); | |
523 | } | |
524 | break; | |
525 | ||
526 | case 0: | |
527 | if (DEBUG_GTE(IO, 3)) | |
528 | rprintf(FINFO, "[%s] perform_io(%ld, %d)\n", who_am_i(), (long)needed, flags); | |
529 | break; | |
530 | ||
531 | default: | |
532 | exit_cleanup(RERR_UNSUPPORTED); | |
533 | } | |
534 | ||
535 | while (1) { | |
536 | switch (flags & PIO_NEED_FLAGS) { | |
537 | case PIO_NEED_INPUT: | |
538 | if (iobuf.in.len >= needed) | |
539 | goto double_break; | |
540 | break; | |
541 | case PIO_NEED_OUTROOM: | |
542 | if (iobuf.out.len <= iobuf.out.size - needed) | |
543 | goto double_break; | |
544 | break; | |
545 | case PIO_NEED_MSGROOM: | |
546 | if (iobuf.msg.len <= iobuf.msg.size - needed) | |
547 | goto double_break; | |
548 | break; | |
549 | } | |
550 | ||
551 | max_fd = -1; | |
4c36ddbe | 552 | |
56014c8c | 553 | FD_ZERO(&r_fds); |
20caffd2 WD |
554 | FD_ZERO(&e_fds); |
555 | if (iobuf.in_fd >= 0 && iobuf.in.size - (iobuf.in.pos + iobuf.in.len)) { | |
556 | if (!read_batch || batch_fd >= 0) { | |
557 | FD_SET(iobuf.in_fd, &r_fds); | |
558 | FD_SET(iobuf.in_fd, &e_fds); | |
559 | } | |
560 | if (iobuf.in_fd > max_fd) | |
561 | max_fd = iobuf.in_fd; | |
562 | } | |
563 | ||
564 | /* Only do more filesfrom processing if there is enough room in the out buffer. */ | |
565 | if (ff_forward_fd >= 0 && iobuf.out.size - iobuf.out.len > FILESFROM_BUFLEN*2) { | |
566 | FD_SET(ff_forward_fd, &r_fds); | |
567 | if (ff_forward_fd > max_fd) | |
568 | max_fd = ff_forward_fd; | |
569 | } | |
570 | ||
a7026ba9 | 571 | FD_ZERO(&w_fds); |
20caffd2 WD |
572 | if (iobuf.out_fd >= 0) { |
573 | if (iobuf.raw_flushing_ends_before | |
574 | || (!iobuf.msg.len && iobuf.out.len > iobuf.out_empty_len && !(flags & PIO_NEED_MSGROOM))) { | |
575 | if (OUT_MULTIPLEXED && !iobuf.raw_flushing_ends_before) { | |
576 | size_t val; | |
577 | ||
578 | /* The iobuf.raw_flushing_ends_before value can point off the end | |
579 | * of the iobuf.out buffer for a while, for easier subtracting. */ | |
580 | iobuf.raw_flushing_ends_before = iobuf.out.pos + iobuf.out.len; | |
581 | ||
582 | SIVAL(iobuf.out.buf + iobuf.raw_data_header_pos, 0, | |
583 | ((MPLEX_BASE + (int)MSG_DATA)<<24) + iobuf.out.len - 4); | |
584 | if ((val = iobuf.out.size - iobuf.raw_data_header_pos) < 4) { | |
585 | /* We used some of the overflow bytes, so move them. */ | |
586 | if (DEBUG_GTE(IO, 4)) { | |
587 | rprintf(FINFO, "[%s] wrap-bytes moved: %d (perform_io)\n", | |
588 | who_am_i(), (int)val); | |
589 | } | |
590 | memcpy(iobuf.out.buf, iobuf.out.buf + iobuf.out.size, 4 - val); | |
591 | } | |
592 | ||
593 | if (DEBUG_GTE(IO, 1)) { | |
594 | rprintf(FINFO, "[%s] send_msg(%d, %ld)\n", | |
595 | who_am_i(), (int)MSG_DATA, (long)iobuf.out.len - 4); | |
596 | } | |
597 | ||
598 | /* reserve room for the next MSG_DATA header */ | |
599 | iobuf.raw_data_header_pos = iobuf.raw_flushing_ends_before; | |
600 | if (iobuf.raw_data_header_pos >= iobuf.out.size) | |
601 | iobuf.raw_data_header_pos -= iobuf.out.size; | |
602 | iobuf.out.len += 4; | |
56014c8c | 603 | } |
20caffd2 WD |
604 | |
605 | empty_buf_len = iobuf.out_empty_len; | |
606 | out = &iobuf.out; | |
607 | } else if (iobuf.msg.len) { | |
608 | empty_buf_len = 0; | |
609 | out = &iobuf.msg; | |
610 | } else | |
611 | out = NULL; | |
612 | if (out) { | |
613 | FD_SET(iobuf.out_fd, &w_fds); | |
614 | if (iobuf.out_fd > max_fd) | |
615 | max_fd = iobuf.out_fd; | |
616 | } | |
617 | } else | |
618 | out = NULL; | |
619 | ||
620 | if (max_fd < 0) { | |
621 | switch (flags & PIO_NEED_FLAGS) { | |
622 | case PIO_NEED_INPUT: | |
623 | rprintf(FERROR, "error in perform_io: no fd for input.\n"); | |
624 | exit_cleanup(RERR_PROTOCOL); | |
625 | case PIO_NEED_OUTROOM: | |
626 | case PIO_NEED_MSGROOM: | |
627 | msgs2stderr = 1; | |
628 | rprintf(FERROR, "error in perform_io: no fd for output.\n"); | |
629 | exit_cleanup(RERR_PROTOCOL); | |
630 | default: | |
631 | /* No stated needs, so I guess this is OK. */ | |
632 | break; | |
56014c8c | 633 | } |
20caffd2 | 634 | break; |
554e0a8d AT |
635 | } |
636 | ||
20caffd2 | 637 | if (extra_flist_sending_enabled) { |
7a7810aa WD |
638 | if (file_total - file_old_total < MAX_FILECNT_LOOKAHEAD |
639 | && file_total - file_old_total >= MIN_FILECNT_LOOKAHEAD) | |
640 | tv.tv_sec = 0; | |
641 | else { | |
642 | extra_flist_sending_enabled = False; | |
643 | tv.tv_sec = select_timeout; | |
644 | } | |
645 | } else | |
ce827c3e | 646 | tv.tv_sec = select_timeout; |
4c36ddbe AT |
647 | tv.tv_usec = 0; |
648 | ||
20caffd2 | 649 | cnt = select(max_fd + 1, &r_fds, &w_fds, &e_fds, &tv); |
554e0a8d | 650 | |
20caffd2 WD |
651 | if (cnt <= 0) { |
652 | if (cnt < 0 && errno == EBADF) { | |
653 | msgs2stderr = 1; | |
554e0a8d | 654 | exit_cleanup(RERR_SOCKETIO); |
2a5df862 | 655 | } |
20caffd2 | 656 | if (extra_flist_sending_enabled) { |
7a7810aa | 657 | extra_flist_sending_enabled = False; |
ce827c3e | 658 | send_extra_file_list(sock_f_out, -1); |
7a7810aa WD |
659 | extra_flist_sending_enabled = !flist_eof; |
660 | } else | |
ce827c3e | 661 | check_timeout(); |
20caffd2 WD |
662 | FD_ZERO(&r_fds); /* Just in case... */ |
663 | FD_ZERO(&w_fds); | |
4c36ddbe AT |
664 | } |
665 | ||
20caffd2 WD |
666 | if (iobuf.in_fd >= 0 && FD_ISSET(iobuf.in_fd, &r_fds)) { |
667 | size_t pos = iobuf.in.pos + iobuf.in.len; | |
668 | size_t len = iobuf.in.size - pos; | |
669 | int n; | |
670 | if ((n = read(iobuf.in_fd, iobuf.in.buf + pos, len)) <= 0) { | |
671 | if (n == 0) { | |
672 | if (!read_batch || batch_fd < 0 || am_generator) | |
673 | whine_about_eof(iobuf.in_fd); /* Doesn't return. */ | |
674 | batch_fd = -1; | |
675 | continue; | |
676 | } | |
677 | if (errno == EINTR || errno == EWOULDBLOCK || errno == EAGAIN) | |
678 | n = 0; | |
679 | else { | |
680 | /* Don't write errors on a dead socket. */ | |
681 | if (iobuf.in_fd == sock_f_in) { | |
682 | if (am_sender) | |
683 | msgs2stderr = 1; | |
684 | rsyserr(FERROR_SOCKET, errno, "read error"); | |
685 | } else | |
686 | rsyserr(FERROR, errno, "read error"); | |
687 | exit_cleanup(RERR_STREAMIO); | |
56014c8c | 688 | } |
20caffd2 WD |
689 | } |
690 | if (msgs2stderr && DEBUG_GTE(IO, 2)) | |
691 | rprintf(FINFO, "[%s] recv=%ld\n", who_am_i(), (long)n); | |
692 | ||
693 | if (io_timeout) | |
694 | last_io_in = time(NULL); | |
695 | stats.total_read += n; | |
696 | ||
697 | iobuf.in.len += n; | |
698 | } | |
699 | ||
700 | if (iobuf.out_fd >= 0 && FD_ISSET(iobuf.out_fd, &w_fds)) { | |
701 | size_t len = iobuf.raw_flushing_ends_before ? iobuf.raw_flushing_ends_before - out->pos : out->len; | |
702 | int n; | |
703 | ||
704 | if (bwlimit_writemax && len > bwlimit_writemax) | |
705 | len = bwlimit_writemax; | |
706 | ||
707 | if (out->pos + len > out->size) | |
708 | len = out->size - out->pos; | |
709 | if ((n = write(iobuf.out_fd, out->buf + out->pos, len)) <= 0) { | |
710 | if (errno == EINTR || errno == EWOULDBLOCK || errno == EAGAIN) | |
711 | n = 0; | |
712 | else { | |
713 | /* Don't write errors on a dead socket. */ | |
714 | msgs2stderr = 1; | |
715 | out->len = iobuf.raw_flushing_ends_before = out->pos = 0; | |
716 | rsyserr(FERROR_SOCKET, errno, "write error"); | |
717 | exit_cleanup(RERR_STREAMIO); | |
718 | } | |
719 | } | |
720 | if (msgs2stderr && DEBUG_GTE(IO, 2)) { | |
721 | rprintf(FINFO, "[%s] %s sent=%ld\n", | |
722 | who_am_i(), out == &iobuf.out ? "out" : "msg", (long)n); | |
723 | } | |
724 | ||
725 | if (io_timeout) | |
726 | last_io_out = time(NULL); | |
727 | stats.total_written += n; | |
728 | ||
729 | if (bwlimit_writemax) | |
730 | sleep_for_bwlimit(n); | |
731 | ||
732 | if ((out->pos += n) == out->size) { | |
733 | if (iobuf.raw_flushing_ends_before) | |
734 | iobuf.raw_flushing_ends_before -= out->size; | |
735 | out->pos = 0; | |
736 | } | |
737 | if (out->pos == iobuf.raw_flushing_ends_before) | |
738 | iobuf.raw_flushing_ends_before = 0; | |
739 | if ((out->len -= n) == empty_buf_len) { | |
740 | out->pos = 0; | |
741 | if (empty_buf_len) | |
742 | iobuf.raw_data_header_pos = 0; | |
743 | } | |
744 | } | |
745 | ||
746 | if (ff_forward_fd >= 0 && FD_ISSET(ff_forward_fd, &r_fds)) { | |
747 | /* This can potentially flush all output and enable | |
748 | * multiplexed output, so keep this last in the loop | |
749 | * and be sure to not cache anything that would break | |
750 | * such a change. */ | |
751 | forward_filesfrom_data(); | |
752 | } | |
753 | } | |
754 | double_break: | |
755 | ||
756 | data = iobuf.in.buf + iobuf.in.pos; | |
757 | ||
758 | if (flags & PIO_CONSUME_INPUT) { | |
759 | iobuf.in.len -= needed; | |
760 | iobuf.in.pos += needed; | |
761 | } | |
762 | ||
763 | return data; | |
764 | } | |
765 | ||
766 | /* Buffer a message for the multiplexed output stream. Is never used for MSG_DATA. */ | |
767 | int send_msg(enum msgcode code, const char *buf, size_t len, int convert) | |
768 | { | |
769 | char *hdr; | |
770 | size_t pos; | |
771 | BOOL want_debug = DEBUG_GTE(IO, 1) && convert >= 0 && (msgs2stderr || code != MSG_INFO); | |
772 | ||
773 | if (!OUT_MULTIPLEXED) | |
774 | return 0; | |
775 | ||
776 | if (want_debug) | |
777 | rprintf(FINFO, "[%s] send_msg(%d, %ld)\n", who_am_i(), (int)code, (long)len); | |
778 | ||
22955408 | 779 | #ifdef ICONV_OPTION |
20caffd2 WD |
780 | if (convert > 0 && ic_send == (iconv_t)-1) |
781 | convert = 0; | |
782 | if (convert > 0) { | |
783 | /* Ensuring double-size room leaves space for a potential conversion. */ | |
784 | if (iobuf.msg.len + len*2 + 4 > iobuf.msg.size) | |
785 | perform_io(len*2 + 4, PIO_NEED_MSGROOM); | |
786 | } else | |
22955408 | 787 | #endif |
20caffd2 WD |
788 | if (iobuf.msg.len + len + 4 > iobuf.msg.size) |
789 | perform_io(len + 4, PIO_NEED_MSGROOM); | |
790 | ||
791 | pos = iobuf.msg.pos + iobuf.msg.len; /* Must be set after any flushing. */ | |
792 | if (pos >= iobuf.msg.size) | |
793 | pos -= iobuf.msg.size; | |
794 | hdr = iobuf.msg.buf + pos; | |
795 | ||
796 | iobuf.msg.len += 4; /* Leave room for the coming header bytes. */ | |
797 | ||
22955408 | 798 | #ifdef ICONV_OPTION |
20caffd2 WD |
799 | if (convert > 0) { |
800 | xbuf inbuf; | |
801 | ||
802 | INIT_XBUF(inbuf, (char*)buf, len, (size_t)-1); | |
803 | ||
804 | len = iobuf.msg.len; | |
805 | iconvbufs(ic_send, &inbuf, &iobuf.msg, | |
806 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE | ICB_CIRCULAR_OUT); | |
807 | if (inbuf.len > 0) { | |
808 | rprintf(FERROR, "overflowed iobuf.msg buffer in send_msg"); | |
809 | exit_cleanup(RERR_UNSUPPORTED); | |
810 | } | |
811 | len = iobuf.msg.len - len; | |
812 | } else | |
22955408 | 813 | #endif |
20caffd2 WD |
814 | { |
815 | size_t siz; | |
816 | ||
817 | if ((pos += 4) >= iobuf.msg.size) | |
818 | pos -= iobuf.msg.size; | |
819 | ||
820 | /* Handle a split copy if we wrap around the end of the circular buffer. */ | |
821 | if (pos >= iobuf.msg.pos && (siz = iobuf.msg.size - pos) < len) { | |
822 | memcpy(iobuf.msg.buf + pos, buf, siz); | |
823 | memcpy(iobuf.msg.buf, buf + siz, len - siz); | |
824 | } else | |
825 | memcpy(iobuf.msg.buf + pos, buf, len); | |
826 | ||
827 | iobuf.msg.len += len; | |
828 | } | |
829 | ||
830 | SIVAL(hdr, 0, ((MPLEX_BASE + (int)code)<<24) + len); | |
831 | /* If the header used any overflow bytes, move them to the start. */ | |
832 | if ((pos = hdr+4 - iobuf.msg.buf) > iobuf.msg.size) { | |
833 | size_t siz = pos - iobuf.msg.size; | |
834 | if (DEBUG_GTE(IO, 4)) | |
835 | rprintf(FINFO, "[%s] wrap-bytes moved: %d (send_msg)\n", who_am_i(), (int)siz); | |
836 | memcpy(iobuf.msg.buf, hdr+4 - siz, siz); | |
837 | } | |
838 | ||
839 | if (want_debug && convert > 0) | |
840 | rprintf(FINFO, "[%s] converted msg len=%ld\n", who_am_i(), (long)len); | |
841 | ||
842 | return 1; | |
843 | } | |
844 | ||
845 | void send_msg_int(enum msgcode code, int num) | |
846 | { | |
847 | char numbuf[4]; | |
848 | ||
849 | if (DEBUG_GTE(IO, 1)) | |
850 | rprintf(FINFO, "[%s] send_msg_int(%d, %d)\n", who_am_i(), (int)code, num); | |
851 | ||
852 | SIVAL(numbuf, 0, num); | |
853 | send_msg(code, numbuf, 4, -1); | |
854 | } | |
855 | ||
856 | static void got_flist_entry_status(enum festatus status, int ndx) | |
857 | { | |
858 | struct file_list *flist = flist_for_ndx(ndx, "got_flist_entry_status"); | |
859 | ||
860 | if (remove_source_files) { | |
861 | active_filecnt--; | |
862 | active_bytecnt -= F_LENGTH(flist->files[ndx - flist->ndx_start]); | |
863 | } | |
864 | ||
865 | if (inc_recurse) | |
866 | flist->in_progress--; | |
867 | ||
868 | switch (status) { | |
869 | case FES_SUCCESS: | |
870 | if (remove_source_files) | |
871 | send_msg_int(MSG_SUCCESS, ndx); | |
872 | if (preserve_hard_links) { | |
873 | struct file_struct *file = flist->files[ndx - flist->ndx_start]; | |
874 | if (F_IS_HLINKED(file)) { | |
875 | flist_ndx_push(&hlink_list, ndx); | |
876 | flist->in_progress++; | |
56014c8c WD |
877 | } |
878 | } | |
20caffd2 WD |
879 | break; |
880 | case FES_REDO: | |
881 | if (read_batch) { | |
882 | if (inc_recurse) | |
883 | flist->in_progress++; | |
884 | break; | |
885 | } | |
886 | if (inc_recurse) | |
887 | flist->to_redo++; | |
888 | flist_ndx_push(&redo_list, ndx); | |
889 | break; | |
890 | case FES_NO_SEND: | |
891 | break; | |
892 | } | |
893 | } | |
894 | ||
895 | /* Note the fds used for the main socket (which might really be a pipe | |
896 | * for a local transfer, but we can ignore that). */ | |
897 | void io_set_sock_fds(int f_in, int f_out) | |
898 | { | |
899 | sock_f_in = f_in; | |
900 | sock_f_out = f_out; | |
901 | } | |
902 | ||
903 | void set_io_timeout(int secs) | |
904 | { | |
905 | io_timeout = secs; | |
906 | ||
907 | if (!io_timeout || io_timeout > SELECT_TIMEOUT) | |
908 | select_timeout = SELECT_TIMEOUT; | |
909 | else | |
910 | select_timeout = io_timeout; | |
911 | ||
912 | allowed_lull = read_batch ? 0 : (io_timeout + 1) / 2; | |
913 | } | |
914 | ||
915 | static void check_for_d_option_error(const char *msg) | |
916 | { | |
917 | static char rsync263_opts[] = "BCDHIKLPRSTWabceghlnopqrtuvxz"; | |
918 | char *colon; | |
919 | int saw_d = 0; | |
920 | ||
921 | if (*msg != 'r' | |
922 | || strncmp(msg, REMOTE_OPTION_ERROR, sizeof REMOTE_OPTION_ERROR - 1) != 0) | |
923 | return; | |
56014c8c | 924 | |
20caffd2 WD |
925 | msg += sizeof REMOTE_OPTION_ERROR - 1; |
926 | if (*msg == '-' || (colon = strchr(msg, ':')) == NULL | |
927 | || strncmp(colon, REMOTE_OPTION_ERROR2, sizeof REMOTE_OPTION_ERROR2 - 1) != 0) | |
928 | return; | |
554e0a8d | 929 | |
20caffd2 WD |
930 | for ( ; *msg != ':'; msg++) { |
931 | if (*msg == 'd') | |
932 | saw_d = 1; | |
933 | else if (*msg == 'e') | |
934 | break; | |
935 | else if (strchr(rsync263_opts, *msg) == NULL) | |
936 | return; | |
937 | } | |
4c36ddbe | 938 | |
20caffd2 WD |
939 | if (saw_d) { |
940 | rprintf(FWARNING, | |
941 | "*** Try using \"--old-d\" if remote rsync is <= 2.6.3 ***\n"); | |
942 | } | |
943 | } | |
1f75bb10 | 944 | |
20caffd2 WD |
945 | /* This is used by the generator to limit how many file transfers can |
946 | * be active at once when --remove-source-files is specified. Without | |
947 | * this, sender-side deletions were mostly happening at the end. */ | |
948 | void increment_active_files(int ndx, int itemizing, enum logcode code) | |
949 | { | |
950 | while (1) { | |
951 | /* TODO: tune these limits? */ | |
952 | int limit = active_bytecnt >= 128*1024 ? 10 : 50; | |
953 | if (active_filecnt < limit) | |
954 | break; | |
955 | check_for_finished_files(itemizing, code, 0); | |
956 | if (active_filecnt < limit) | |
957 | break; | |
958 | wait_for_receiver(); | |
959 | } | |
00bdf899 | 960 | |
20caffd2 WD |
961 | active_filecnt++; |
962 | active_bytecnt += F_LENGTH(cur_flist->files[ndx - cur_flist->ndx_start]); | |
963 | } | |
1f75bb10 | 964 | |
20caffd2 WD |
965 | int get_redo_num(void) |
966 | { | |
967 | return flist_ndx_pop(&redo_list); | |
968 | } | |
969 | ||
970 | int get_hlink_num(void) | |
971 | { | |
972 | return flist_ndx_pop(&hlink_list); | |
973 | } | |
8d9dc9f9 | 974 | |
20caffd2 WD |
975 | /* When we're the receiver and we have a local --files-from list of names |
976 | * that needs to be sent over the socket to the sender, we have to do two | |
977 | * things at the same time: send the sender a list of what files we're | |
978 | * processing and read the incoming file+info list from the sender. We do | |
979 | * this by making recv_file_list() call forward_filesfrom_data(), which | |
980 | * will ensure that we forward data to the sender until we get some data | |
981 | * for recv_file_list() to use. */ | |
982 | void start_filesfrom_forwarding(int fd) | |
983 | { | |
984 | ff_forward_fd = fd; | |
985 | if (protocol_version < 31) { | |
986 | int save_fd = iobuf.out_fd; | |
987 | /* Older protocols send the files-from data w/o packaging it in | |
988 | * multiplexed I/O packets. To match this, we temporarily turn | |
989 | * off the multiplexing of our output w/o disabling buffering. */ | |
990 | assert(OUT_MULTIPLEXED); | |
991 | /* Be extra, extra sure no messages go out before files-from data. */ | |
992 | iobuf.msg.pos = iobuf.msg.len = 0; | |
993 | io_end_multiplex_out(False); | |
994 | iobuf.out_fd = save_fd; | |
995 | } | |
4c36ddbe | 996 | } |
8d9dc9f9 | 997 | |
67b8f3df | 998 | /* Read a line into the "buf" buffer. */ |
ba525f77 | 999 | int read_line(int fd, char *buf, size_t bufsiz, int flags) |
56014c8c | 1000 | { |
ba525f77 | 1001 | char ch, *s, *eob; |
56014c8c | 1002 | |
ba525f77 WD |
1003 | #ifdef ICONV_OPTION |
1004 | if (flags & RL_CONVERT && iconv_buf.size < bufsiz) | |
1005 | realloc_xbuf(&iconv_buf, bufsiz + 1024); | |
1006 | #endif | |
1007 | ||
56014c8c | 1008 | start: |
22955408 | 1009 | #ifdef ICONV_OPTION |
ba525f77 | 1010 | s = flags & RL_CONVERT ? iconv_buf.buf : buf; |
22955408 WD |
1011 | #else |
1012 | s = buf; | |
1013 | #endif | |
ba525f77 | 1014 | eob = s + bufsiz - 1; |
56014c8c | 1015 | while (1) { |
20caffd2 WD |
1016 | /* We avoid read_byte() for files because files can return an EOF. */ |
1017 | if (fd == iobuf.in_fd) | |
1018 | ch = read_byte(fd); | |
1019 | else if (safe_read(fd, &ch, 1) == 0) | |
56014c8c | 1020 | break; |
ba525f77 | 1021 | if (flags & RL_EOL_NULLS ? ch == '\0' : (ch == '\r' || ch == '\n')) { |
67b8f3df | 1022 | /* Skip empty lines if dumping comments. */ |
ba525f77 | 1023 | if (flags & RL_DUMP_COMMENTS && s == buf) |
56014c8c WD |
1024 | continue; |
1025 | break; | |
1026 | } | |
1027 | if (s < eob) | |
1028 | *s++ = ch; | |
1029 | } | |
1030 | *s = '\0'; | |
7a55d06e | 1031 | |
ba525f77 | 1032 | if (flags & RL_DUMP_COMMENTS && (*buf == '#' || *buf == ';')) |
56014c8c WD |
1033 | goto start; |
1034 | ||
ba525f77 WD |
1035 | #ifdef ICONV_OPTION |
1036 | if (flags & RL_CONVERT) { | |
1037 | xbuf outbuf; | |
1038 | INIT_XBUF(outbuf, buf, 0, bufsiz); | |
1039 | iconv_buf.pos = 0; | |
1040 | iconv_buf.len = s - iconv_buf.buf; | |
1041 | iconvbufs(ic_recv, &iconv_buf, &outbuf, | |
1042 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE); | |
1043 | outbuf.buf[outbuf.len] = '\0'; | |
1044 | return outbuf.len; | |
1045 | } | |
1046 | #endif | |
1047 | ||
67b8f3df WD |
1048 | return s - buf; |
1049 | } | |
1050 | ||
53936ef9 WD |
1051 | void read_args(int f_in, char *mod_name, char *buf, size_t bufsiz, int rl_nulls, |
1052 | char ***argv_p, int *argc_p, char **request_p) | |
67b8f3df WD |
1053 | { |
1054 | int maxargs = MAX_ARGS; | |
1055 | int dot_pos = 0; | |
1056 | int argc = 0; | |
1057 | char **argv, *p; | |
22955408 WD |
1058 | int rl_flags = (rl_nulls ? RL_EOL_NULLS : 0); |
1059 | ||
1060 | #ifdef ICONV_OPTION | |
1061 | rl_flags |= (protect_args && ic_recv != (iconv_t)-1 ? RL_CONVERT : 0); | |
1062 | #endif | |
67b8f3df WD |
1063 | |
1064 | if (!(argv = new_array(char *, maxargs))) | |
1065 | out_of_memory("read_args"); | |
53936ef9 | 1066 | if (mod_name && !protect_args) |
67b8f3df WD |
1067 | argv[argc++] = "rsyncd"; |
1068 | ||
1069 | while (1) { | |
ba525f77 | 1070 | if (read_line(f_in, buf, bufsiz, rl_flags) == 0) |
67b8f3df WD |
1071 | break; |
1072 | ||
53936ef9 | 1073 | if (argc == maxargs-1) { |
67b8f3df WD |
1074 | maxargs += MAX_ARGS; |
1075 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
1076 | out_of_memory("read_args"); | |
1077 | } | |
1078 | ||
1079 | if (dot_pos) { | |
1080 | if (request_p) { | |
1081 | *request_p = strdup(buf); | |
1082 | request_p = NULL; | |
1083 | } | |
1084 | if (mod_name) | |
1085 | glob_expand_module(mod_name, buf, &argv, &argc, &maxargs); | |
1086 | else | |
1087 | glob_expand(buf, &argv, &argc, &maxargs); | |
1088 | } else { | |
1089 | if (!(p = strdup(buf))) | |
1090 | out_of_memory("read_args"); | |
1091 | argv[argc++] = p; | |
1092 | if (*p == '.' && p[1] == '\0') | |
1093 | dot_pos = argc; | |
1094 | } | |
1095 | } | |
53936ef9 | 1096 | argv[argc] = NULL; |
67b8f3df | 1097 | |
987a5467 WD |
1098 | glob_expand(NULL, NULL, NULL, NULL); |
1099 | ||
67b8f3df WD |
1100 | *argc_p = argc; |
1101 | *argv_p = argv; | |
56014c8c | 1102 | } |
7a55d06e | 1103 | |
8ef246e0 | 1104 | int io_start_buffering_out(int f_out) |
1f75bb10 | 1105 | { |
20caffd2 WD |
1106 | if (msgs2stderr && DEBUG_GTE(IO, 2)) |
1107 | rprintf(FINFO, "[%s] io_start_buffering_out(%d)\n", who_am_i(), f_out); | |
1108 | ||
1109 | if (OUT_MULTIPLEXED && !iobuf.msg.buf) { | |
1110 | iobuf.msg.size = IO_BUFFER_SIZE - 4; | |
1111 | if (!(iobuf.msg.buf = new_array(char, iobuf.msg.size + 4))) | |
1112 | out_of_memory("io_start_buffering_out"); | |
1113 | iobuf.msg.pos = iobuf.msg.len = 0; | |
1114 | } | |
1115 | ||
1116 | if (iobuf.out.buf) { | |
1117 | if (iobuf.out_fd == -1) | |
1118 | iobuf.out_fd = f_out; | |
1119 | assert(f_out == iobuf.out_fd); | |
8ef246e0 WD |
1120 | return 0; |
1121 | } | |
20caffd2 WD |
1122 | |
1123 | iobuf.out.size = IO_BUFFER_SIZE * 2 - 4; | |
1124 | /* The 4 overflow bytes makes some circular-buffer wrapping operations easier. */ | |
1125 | if (!(iobuf.out.buf = new_array(char, iobuf.out.size + 4))) | |
1f75bb10 | 1126 | out_of_memory("io_start_buffering_out"); |
20caffd2 WD |
1127 | iobuf.out.pos = iobuf.out.len = 0; |
1128 | iobuf.out_fd = f_out; | |
1129 | ||
8ef246e0 | 1130 | return 1; |
1f75bb10 WD |
1131 | } |
1132 | ||
8ef246e0 | 1133 | int io_start_buffering_in(int f_in) |
1f75bb10 | 1134 | { |
20caffd2 WD |
1135 | if (msgs2stderr && DEBUG_GTE(IO, 2)) |
1136 | rprintf(FINFO, "[%s] io_start_buffering_in(%d)\n", who_am_i(), f_in); | |
1137 | ||
1138 | if (iobuf.in.buf) { | |
1139 | if (iobuf.in_fd == -1) | |
1140 | iobuf.in_fd = f_in; | |
1141 | assert(f_in == iobuf.in_fd); | |
8ef246e0 WD |
1142 | return 0; |
1143 | } | |
20caffd2 WD |
1144 | |
1145 | iobuf.in.size = IO_BUFFER_SIZE; | |
1146 | if (!(iobuf.in.buf = new_array(char, iobuf.in.size))) | |
1f75bb10 | 1147 | out_of_memory("io_start_buffering_in"); |
20caffd2 WD |
1148 | |
1149 | iobuf.in.pos = iobuf.in.len = 0; | |
1150 | ||
1151 | iobuf.in_fd = f_in; | |
1152 | ||
8ef246e0 | 1153 | return 1; |
1f75bb10 WD |
1154 | } |
1155 | ||
20caffd2 | 1156 | static void free_xbuf(xbuf *x) |
1f75bb10 | 1157 | { |
20caffd2 WD |
1158 | if (x->buf) |
1159 | free(x->buf); | |
1160 | memset(x, 0, sizeof (xbuf)); | |
8ef246e0 WD |
1161 | } |
1162 | ||
20caffd2 | 1163 | void io_end_buffering_in(BOOL free_buffers) |
8ef246e0 | 1164 | { |
20caffd2 WD |
1165 | if (DEBUG_GTE(IO, 2)) { |
1166 | rprintf(FINFO, "[%s] io_end_buffering_in(%s)\n", | |
1167 | who_am_i(), free_buffers ? "True" : "False"); | |
1168 | } | |
1169 | ||
1170 | if (free_buffers) | |
1171 | free_xbuf(&iobuf.in); | |
1172 | else | |
1173 | iobuf.in.pos = iobuf.in.len = 0; | |
1174 | ||
1175 | iobuf.in_fd = -1; | |
1176 | } | |
1177 | ||
1178 | void io_end_buffering_out(BOOL free_buffers) | |
1179 | { | |
1180 | if (DEBUG_GTE(IO, 2)) { | |
1181 | rprintf(FINFO, "[%s] io_end_buffering_out(%s)\n", | |
1182 | who_am_i(), free_buffers ? "True" : "False"); | |
1183 | } | |
1184 | ||
8ef246e0 | 1185 | io_flush(FULL_FLUSH); |
20caffd2 WD |
1186 | |
1187 | if (free_buffers) { | |
1188 | free_xbuf(&iobuf.out); | |
1189 | free_xbuf(&iobuf.msg); | |
1190 | } else { | |
1191 | iobuf.out.pos = iobuf.out.len = 0; | |
1192 | iobuf.msg.pos = iobuf.msg.len = 0; | |
1193 | } | |
1194 | ||
1195 | iobuf.out_fd = -1; | |
1f75bb10 WD |
1196 | } |
1197 | ||
be91bd81 | 1198 | void maybe_flush_socket(int important) |
626bec8e | 1199 | { |
1ec57e4d WD |
1200 | if (flist_eof && iobuf.out.buf && iobuf.out.len > iobuf.out_empty_len |
1201 | && (important || time(NULL) - last_io_out >= 5)) | |
626bec8e WD |
1202 | io_flush(NORMAL_FLUSH); |
1203 | } | |
1204 | ||
cdf236aa | 1205 | void maybe_send_keepalive(void) |
9e2409ab | 1206 | { |
3b0a30eb | 1207 | if (time(NULL) - last_io_out >= allowed_lull) { |
20caffd2 | 1208 | if (!iobuf.msg.len && iobuf.out.len == iobuf.out_empty_len) { |
3221f451 WD |
1209 | if (protocol_version < 29) |
1210 | return; /* there's nothing we can do */ | |
8ef246e0 | 1211 | if (protocol_version >= 30) |
332cf6df | 1212 | send_msg(MSG_NOOP, "", 0, 0); |
8ef246e0 | 1213 | else { |
20caffd2 WD |
1214 | write_int(iobuf.out_fd, cur_flist->used); |
1215 | write_shortint(iobuf.out_fd, ITEM_IS_NEW); | |
8ef246e0 | 1216 | } |
9e2409ab | 1217 | } |
20caffd2 WD |
1218 | if (iobuf.msg.len) |
1219 | perform_io(iobuf.msg.size - iobuf.msg.len + 1, PIO_NEED_MSGROOM); | |
1220 | else if (iobuf.out.len > iobuf.out_empty_len) | |
9e2409ab WD |
1221 | io_flush(NORMAL_FLUSH); |
1222 | } | |
1223 | } | |
1224 | ||
20caffd2 | 1225 | void start_flist_forward(int ndx) |
8ef246e0 | 1226 | { |
20caffd2 WD |
1227 | write_int(iobuf.out_fd, ndx); |
1228 | forward_flist_data = 1; | |
8ef246e0 WD |
1229 | } |
1230 | ||
20caffd2 | 1231 | void stop_flist_forward(void) |
4c36ddbe | 1232 | { |
20caffd2 | 1233 | forward_flist_data = 0; |
8d9dc9f9 AT |
1234 | } |
1235 | ||
d8587b46 | 1236 | /* Read a message from a multiplexed source. */ |
20caffd2 | 1237 | static void read_a_msg(void) |
8d9dc9f9 | 1238 | { |
20caffd2 WD |
1239 | char *data, line[BIGPATHBUFLEN]; |
1240 | int tag; | |
d8587b46 | 1241 | size_t msg_bytes; |
d8587b46 | 1242 | |
20caffd2 WD |
1243 | data = perform_io(4, PIO_INPUT_AND_CONSUME); |
1244 | tag = IVAL(data, 0); | |
d8587b46 WD |
1245 | |
1246 | msg_bytes = tag & 0xFFFFFF; | |
1247 | tag = (tag >> 24) - MPLEX_BASE; | |
1248 | ||
20caffd2 WD |
1249 | if (DEBUG_GTE(IO, 1) && (msgs2stderr || tag != MSG_INFO)) |
1250 | rprintf(FINFO, "[%s] got msg=%d, len=%ld\n", who_am_i(), (int)tag, (long)msg_bytes); | |
d8587b46 WD |
1251 | |
1252 | switch (tag) { | |
1253 | case MSG_DATA: | |
20caffd2 WD |
1254 | assert(iobuf.raw_input_ends_before == 0); |
1255 | /* Though this does not yet read the data, we do mark where in | |
1256 | * the buffer the msg data will end once it is read. It is | |
1257 | * possible that this points off the end of the buffer, in | |
1258 | * which case the gradual reading of the input stream will | |
1259 | * cause this value to decrease and eventually become real. */ | |
1260 | iobuf.raw_input_ends_before = iobuf.in.pos + msg_bytes; | |
d8587b46 | 1261 | break; |
20caffd2 WD |
1262 | case MSG_STATS: |
1263 | if (msg_bytes != sizeof stats.total_read || !am_generator) | |
d8587b46 | 1264 | goto invalid_msg; |
20caffd2 WD |
1265 | data = perform_io(sizeof stats.total_read, PIO_INPUT_AND_CONSUME); |
1266 | memcpy((char*)&stats.total_read, data, sizeof stats.total_read); | |
d8587b46 WD |
1267 | break; |
1268 | case MSG_REDO: | |
1269 | if (msg_bytes != 4 || !am_generator) | |
1270 | goto invalid_msg; | |
20caffd2 WD |
1271 | data = perform_io(4, PIO_INPUT_AND_CONSUME); |
1272 | got_flist_entry_status(FES_REDO, IVAL(data, 0)); | |
d8587b46 WD |
1273 | break; |
1274 | case MSG_IO_ERROR: | |
1275 | if (msg_bytes != 4 || am_sender) | |
1276 | goto invalid_msg; | |
20caffd2 WD |
1277 | data = perform_io(4, PIO_INPUT_AND_CONSUME); |
1278 | io_error |= IVAL(data, 0); | |
d8587b46 | 1279 | if (!am_generator) |
20caffd2 | 1280 | send_msg(MSG_IO_ERROR, data, 4, 0); |
d8587b46 WD |
1281 | break; |
1282 | case MSG_NOOP: | |
1283 | if (am_sender) | |
1284 | maybe_send_keepalive(); | |
1285 | break; | |
d8587b46 WD |
1286 | case MSG_DELETED: |
1287 | if (msg_bytes >= sizeof line) | |
1288 | goto overflow; | |
1289 | if (am_generator) { | |
20caffd2 | 1290 | memcpy(line, perform_io(msg_bytes, PIO_INPUT_AND_CONSUME), msg_bytes); |
d8587b46 WD |
1291 | send_msg(MSG_DELETED, line, msg_bytes, 1); |
1292 | break; | |
1293 | } | |
1294 | #ifdef ICONV_OPTION | |
1295 | if (ic_recv != (iconv_t)-1) { | |
1296 | xbuf outbuf, inbuf; | |
1297 | char ibuf[512]; | |
1298 | int add_null = 0; | |
1299 | ||
1300 | INIT_CONST_XBUF(outbuf, line); | |
1301 | INIT_XBUF(inbuf, ibuf, 0, (size_t)-1); | |
1302 | ||
1303 | while (msg_bytes) { | |
20caffd2 WD |
1304 | inbuf.len = msg_bytes > sizeof ibuf ? sizeof ibuf : msg_bytes; |
1305 | memcpy(inbuf.buf, perform_io(inbuf.len, PIO_INPUT_AND_CONSUME), inbuf.len); | |
d8587b46 WD |
1306 | if (!(msg_bytes -= inbuf.len) |
1307 | && !ibuf[inbuf.len-1]) | |
1308 | inbuf.len--, add_null = 1; | |
1309 | if (iconvbufs(ic_send, &inbuf, &outbuf, | |
1310 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE) < 0) | |
1311 | goto overflow; | |
1312 | } | |
1313 | if (add_null) { | |
1314 | if (outbuf.len == outbuf.size) | |
1315 | goto overflow; | |
1316 | outbuf.buf[outbuf.len++] = '\0'; | |
1317 | } | |
1318 | msg_bytes = outbuf.len; | |
1319 | } else | |
1320 | #endif | |
20caffd2 | 1321 | memcpy(line, perform_io(msg_bytes, PIO_INPUT_AND_CONSUME), msg_bytes); |
d8587b46 WD |
1322 | /* A directory name was sent with the trailing null */ |
1323 | if (msg_bytes > 0 && !line[msg_bytes-1]) | |
1324 | log_delete(line, S_IFDIR); | |
1325 | else { | |
1326 | line[msg_bytes] = '\0'; | |
1327 | log_delete(line, S_IFREG); | |
1328 | } | |
1329 | break; | |
1330 | case MSG_SUCCESS: | |
1331 | if (msg_bytes != 4) { | |
1332 | invalid_msg: | |
1333 | rprintf(FERROR, "invalid multi-message %d:%lu [%s%s]\n", | |
1334 | tag, (unsigned long)msg_bytes, who_am_i(), | |
1335 | inc_recurse ? "/inc" : ""); | |
1336 | exit_cleanup(RERR_STREAMIO); | |
1337 | } | |
20caffd2 | 1338 | data = perform_io(4, PIO_INPUT_AND_CONSUME); |
d8587b46 | 1339 | if (am_generator) |
20caffd2 | 1340 | got_flist_entry_status(FES_SUCCESS, IVAL(data, 0)); |
d8587b46 | 1341 | else |
20caffd2 | 1342 | successful_send(IVAL(data, 0)); |
d8587b46 WD |
1343 | break; |
1344 | case MSG_NO_SEND: | |
1345 | if (msg_bytes != 4) | |
1346 | goto invalid_msg; | |
20caffd2 | 1347 | data = perform_io(4, PIO_INPUT_AND_CONSUME); |
d8587b46 | 1348 | if (am_generator) |
20caffd2 | 1349 | got_flist_entry_status(FES_NO_SEND, IVAL(data, 0)); |
d8587b46 | 1350 | else |
20caffd2 | 1351 | send_msg(MSG_NO_SEND, data, 4, 0); |
d8587b46 WD |
1352 | break; |
1353 | case MSG_ERROR_SOCKET: | |
1354 | case MSG_ERROR_UTF8: | |
1355 | case MSG_CLIENT: | |
1356 | case MSG_LOG: | |
1357 | if (!am_generator) | |
1358 | goto invalid_msg; | |
1359 | if (tag == MSG_ERROR_SOCKET) | |
20caffd2 | 1360 | msgs2stderr = 1; |
d8587b46 WD |
1361 | /* FALL THROUGH */ |
1362 | case MSG_INFO: | |
1363 | case MSG_ERROR: | |
1364 | case MSG_ERROR_XFER: | |
1365 | case MSG_WARNING: | |
1366 | if (msg_bytes >= sizeof line) { | |
1367 | overflow: | |
1368 | rprintf(FERROR, | |
1369 | "multiplexing overflow %d:%lu [%s%s]\n", | |
1370 | tag, (unsigned long)msg_bytes, who_am_i(), | |
1371 | inc_recurse ? "/inc" : ""); | |
1372 | exit_cleanup(RERR_STREAMIO); | |
1373 | } | |
20caffd2 | 1374 | memcpy(line, perform_io(msg_bytes, PIO_INPUT_AND_CONSUME), msg_bytes); |
d8587b46 WD |
1375 | rwrite((enum logcode)tag, line, msg_bytes, !am_generator); |
1376 | if (first_message) { | |
20caffd2 | 1377 | if (list_only && !am_sender && tag == 1 && msg_bytes < sizeof line) { |
d8587b46 WD |
1378 | line[msg_bytes] = '\0'; |
1379 | check_for_d_option_error(line); | |
1380 | } | |
1381 | first_message = 0; | |
1382 | } | |
1383 | break; | |
1384 | default: | |
1385 | rprintf(FERROR, "unexpected tag %d [%s%s]\n", | |
1386 | tag, who_am_i(), inc_recurse ? "/inc" : ""); | |
1387 | exit_cleanup(RERR_STREAMIO); | |
1388 | } | |
d8587b46 WD |
1389 | } |
1390 | ||
20caffd2 | 1391 | void wait_for_receiver(void) |
d8587b46 | 1392 | { |
20caffd2 WD |
1393 | if (!iobuf.raw_input_ends_before) |
1394 | read_a_msg(); | |
1395 | ||
1396 | if (iobuf.raw_input_ends_before) { | |
1397 | int ndx = read_int(iobuf.in_fd); | |
1398 | if (ndx < 0) { | |
1399 | switch (ndx) { | |
1400 | case NDX_FLIST_EOF: | |
1401 | flist_eof = 1; | |
1402 | if (DEBUG_GTE(FLIST, 3)) | |
1403 | rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i()); | |
1404 | break; | |
1405 | case NDX_DONE: | |
1406 | msgdone_cnt++; | |
1407 | break; | |
1408 | default: | |
1409 | exit_cleanup(RERR_STREAMIO); | |
1410 | } | |
1411 | } else { | |
1412 | struct file_list *flist; | |
1413 | if (DEBUG_GTE(FLIST, 2)) { | |
1414 | rprintf(FINFO, "[%s] receiving flist for dir %d\n", | |
1415 | who_am_i(), ndx); | |
1416 | } | |
1417 | flist = recv_file_list(iobuf.in_fd); | |
1418 | flist->parent_ndx = ndx; | |
1419 | #ifdef SUPPORT_HARD_LINKS | |
1420 | if (preserve_hard_links) | |
1421 | match_hard_links(flist); | |
1422 | #endif | |
8d9dc9f9 | 1423 | } |
b9f592fb | 1424 | } |
720b47f2 AT |
1425 | } |
1426 | ||
3a993aa4 | 1427 | unsigned short read_shortint(int f) |
9361f839 | 1428 | { |
482f48cc | 1429 | char b[2]; |
20caffd2 | 1430 | read_buf(f, b, 2); |
482f48cc | 1431 | return (UVAL(b, 1) << 8) + UVAL(b, 0); |
9361f839 WD |
1432 | } |
1433 | ||
b7922338 | 1434 | int32 read_int(int f) |
720b47f2 | 1435 | { |
4c36ddbe | 1436 | char b[4]; |
d8aeda1e | 1437 | int32 num; |
d730b113 | 1438 | |
20caffd2 | 1439 | read_buf(f, b, 4); |
482f48cc WD |
1440 | num = IVAL(b, 0); |
1441 | #if SIZEOF_INT32 > 4 | |
1442 | if (num & (int32)0x80000000) | |
1443 | num |= ~(int32)0xffffffff; | |
1444 | #endif | |
d8aeda1e | 1445 | return num; |
720b47f2 AT |
1446 | } |
1447 | ||
351e23ad | 1448 | int32 read_varint(int f) |
3a6a366f | 1449 | { |
351e23ad | 1450 | union { |
20caffd2 WD |
1451 | char b[5]; |
1452 | int32 x; | |
351e23ad WD |
1453 | } u; |
1454 | uchar ch; | |
1455 | int extra; | |
1456 | ||
1457 | u.x = 0; | |
20caffd2 | 1458 | ch = read_byte(f); |
351e23ad WD |
1459 | extra = int_byte_extra[ch / 4]; |
1460 | if (extra) { | |
1461 | uchar bit = ((uchar)1<<(8-extra)); | |
1462 | if (extra >= (int)sizeof u.b) { | |
1463 | rprintf(FERROR, "Overflow in read_varint()\n"); | |
1464 | exit_cleanup(RERR_STREAMIO); | |
1465 | } | |
20caffd2 | 1466 | read_buf(f, u.b, extra); |
351e23ad WD |
1467 | u.b[extra] = ch & (bit-1); |
1468 | } else | |
1469 | u.b[0] = ch; | |
1470 | #if CAREFUL_ALIGNMENT | |
1471 | u.x = IVAL(u.b,0); | |
1472 | #endif | |
1473 | #if SIZEOF_INT32 > 4 | |
1474 | if (u.x & (int32)0x80000000) | |
1475 | u.x |= ~(int32)0xffffffff; | |
1476 | #endif | |
1477 | return u.x; | |
1478 | } | |
71c46176 | 1479 | |
351e23ad WD |
1480 | int64 read_varlong(int f, uchar min_bytes) |
1481 | { | |
1482 | union { | |
20caffd2 WD |
1483 | char b[9]; |
1484 | int64 x; | |
351e23ad WD |
1485 | } u; |
1486 | char b2[8]; | |
1487 | int extra; | |
71c46176 | 1488 | |
031fa9ad | 1489 | #if SIZEOF_INT64 < 8 |
351e23ad | 1490 | memset(u.b, 0, 8); |
031fa9ad | 1491 | #else |
351e23ad | 1492 | u.x = 0; |
031fa9ad | 1493 | #endif |
20caffd2 | 1494 | read_buf(f, b2, min_bytes); |
351e23ad WD |
1495 | memcpy(u.b, b2+1, min_bytes-1); |
1496 | extra = int_byte_extra[CVAL(b2, 0) / 4]; | |
1497 | if (extra) { | |
1498 | uchar bit = ((uchar)1<<(8-extra)); | |
1499 | if (min_bytes + extra > (int)sizeof u.b) { | |
1500 | rprintf(FERROR, "Overflow in read_varlong()\n"); | |
1501 | exit_cleanup(RERR_STREAMIO); | |
1502 | } | |
20caffd2 | 1503 | read_buf(f, u.b + min_bytes - 1, extra); |
351e23ad | 1504 | u.b[min_bytes + extra - 1] = CVAL(b2, 0) & (bit-1); |
4ea4acf1 | 1505 | #if SIZEOF_INT64 < 8 |
351e23ad | 1506 | if (min_bytes + extra > 5 || u.b[4] || CVAL(u.b,3) & 0x80) { |
4ea4acf1 WD |
1507 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); |
1508 | exit_cleanup(RERR_UNSUPPORTED); | |
1509 | } | |
1510 | #endif | |
351e23ad WD |
1511 | } else |
1512 | u.b[min_bytes + extra - 1] = CVAL(b2, 0); | |
1513 | #if SIZEOF_INT64 < 8 | |
1514 | u.x = IVAL(u.b,0); | |
1515 | #elif CAREFUL_ALIGNMENT | |
1516 | u.x = IVAL(u.b,0) | (((int64)IVAL(u.b,4))<<32); | |
1517 | #endif | |
1518 | return u.x; | |
1519 | } | |
1520 | ||
1521 | int64 read_longint(int f) | |
1522 | { | |
4ea4acf1 | 1523 | #if SIZEOF_INT64 >= 8 |
351e23ad | 1524 | char b[9]; |
4ea4acf1 | 1525 | #endif |
351e23ad | 1526 | int32 num = read_int(f); |
71c46176 | 1527 | |
351e23ad WD |
1528 | if (num != (int32)0xffffffff) |
1529 | return num; | |
1530 | ||
1531 | #if SIZEOF_INT64 < 8 | |
1532 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); | |
1533 | exit_cleanup(RERR_UNSUPPORTED); | |
1534 | #else | |
20caffd2 | 1535 | read_buf(f, b, 8); |
351e23ad WD |
1536 | return IVAL(b,0) | (((int64)IVAL(b,4))<<32); |
1537 | #endif | |
3a6a366f AT |
1538 | } |
1539 | ||
4a19c3b2 | 1540 | void read_buf(int f, char *buf, size_t len) |
720b47f2 | 1541 | { |
20caffd2 WD |
1542 | if (f != iobuf.in_fd) { |
1543 | if (safe_read(f, buf, len) != len) | |
1544 | whine_about_eof(f); /* Doesn't return. */ | |
1545 | goto batch_copy; | |
1546 | } | |
1547 | ||
1548 | if (!IN_MULTIPLEXED) { | |
1549 | memcpy(buf, perform_io(len, PIO_INPUT_AND_CONSUME), len); | |
1550 | if (forward_flist_data) | |
1551 | write_buf(iobuf.out_fd, buf, len); | |
1552 | batch_copy: | |
1553 | if (f == write_batch_monitor_in) | |
1554 | safe_write(batch_fd, buf, len); | |
1555 | return; | |
1556 | } | |
1557 | ||
1558 | while (1) { | |
1559 | char *data; | |
1560 | size_t siz; | |
1561 | ||
1562 | while (!iobuf.raw_input_ends_before) | |
1563 | read_a_msg(); | |
1564 | ||
1565 | siz = MIN(len, iobuf.raw_input_ends_before - iobuf.in.pos); | |
1566 | data = perform_io(siz, PIO_INPUT_AND_CONSUME); | |
1567 | if (iobuf.in.pos == iobuf.raw_input_ends_before) | |
1568 | iobuf.raw_input_ends_before = 0; | |
1569 | ||
1570 | /* The bytes at the "data" pointer will survive long | |
1571 | * enough to make a copy, but not past future I/O. */ | |
1572 | memcpy(buf, data, siz); | |
1573 | ||
1574 | if (forward_flist_data) | |
1575 | write_buf(iobuf.out_fd, buf, siz); | |
1576 | ||
1577 | if (f == write_batch_monitor_in) | |
1578 | safe_write(batch_fd, buf, siz); | |
1579 | ||
1580 | if ((len -= siz) == 0) | |
1581 | break; | |
1582 | buf += siz; | |
1583 | } | |
720b47f2 AT |
1584 | } |
1585 | ||
4a19c3b2 | 1586 | void read_sbuf(int f, char *buf, size_t len) |
575f2fca | 1587 | { |
20caffd2 | 1588 | read_buf(f, buf, len); |
af436313 | 1589 | buf[len] = '\0'; |
575f2fca AT |
1590 | } |
1591 | ||
9361f839 | 1592 | uchar read_byte(int f) |
182dca5c | 1593 | { |
9361f839 | 1594 | uchar c; |
20caffd2 | 1595 | read_buf(f, (char*)&c, 1); |
4c36ddbe | 1596 | return c; |
182dca5c | 1597 | } |
720b47f2 | 1598 | |
46e99b09 WD |
1599 | int read_vstring(int f, char *buf, int bufsize) |
1600 | { | |
1601 | int len = read_byte(f); | |
1602 | ||
1603 | if (len & 0x80) | |
1604 | len = (len & ~0x80) * 0x100 + read_byte(f); | |
1605 | ||
1606 | if (len >= bufsize) { | |
1607 | rprintf(FERROR, "over-long vstring received (%d > %d)\n", | |
1608 | len, bufsize - 1); | |
9a6ed83f | 1609 | return -1; |
46e99b09 WD |
1610 | } |
1611 | ||
1612 | if (len) | |
20caffd2 | 1613 | read_buf(f, buf, len); |
46e99b09 WD |
1614 | buf[len] = '\0'; |
1615 | return len; | |
1616 | } | |
1617 | ||
188fed95 WD |
1618 | /* Populate a sum_struct with values from the socket. This is |
1619 | * called by both the sender and the receiver. */ | |
1620 | void read_sum_head(int f, struct sum_struct *sum) | |
1621 | { | |
8bd77e70 | 1622 | int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE; |
188fed95 | 1623 | sum->count = read_int(f); |
c638caa6 WD |
1624 | if (sum->count < 0) { |
1625 | rprintf(FERROR, "Invalid checksum count %ld [%s]\n", | |
1626 | (long)sum->count, who_am_i()); | |
1627 | exit_cleanup(RERR_PROTOCOL); | |
1628 | } | |
188fed95 | 1629 | sum->blength = read_int(f); |
8bd77e70 | 1630 | if (sum->blength < 0 || sum->blength > max_blength) { |
cdf236aa WD |
1631 | rprintf(FERROR, "Invalid block length %ld [%s]\n", |
1632 | (long)sum->blength, who_am_i()); | |
188fed95 WD |
1633 | exit_cleanup(RERR_PROTOCOL); |
1634 | } | |
1635 | sum->s2length = protocol_version < 27 ? csum_length : (int)read_int(f); | |
a0456b9c | 1636 | if (sum->s2length < 0 || sum->s2length > MAX_DIGEST_LEN) { |
cdf236aa WD |
1637 | rprintf(FERROR, "Invalid checksum length %d [%s]\n", |
1638 | sum->s2length, who_am_i()); | |
188fed95 WD |
1639 | exit_cleanup(RERR_PROTOCOL); |
1640 | } | |
1641 | sum->remainder = read_int(f); | |
1642 | if (sum->remainder < 0 || sum->remainder > sum->blength) { | |
cdf236aa WD |
1643 | rprintf(FERROR, "Invalid remainder length %ld [%s]\n", |
1644 | (long)sum->remainder, who_am_i()); | |
188fed95 WD |
1645 | exit_cleanup(RERR_PROTOCOL); |
1646 | } | |
1647 | } | |
1648 | ||
c207d7ec WD |
1649 | /* Send the values from a sum_struct over the socket. Set sum to |
1650 | * NULL if there are no checksums to send. This is called by both | |
1651 | * the generator and the sender. */ | |
1652 | void write_sum_head(int f, struct sum_struct *sum) | |
1653 | { | |
1654 | static struct sum_struct null_sum; | |
1655 | ||
1656 | if (sum == NULL) | |
1657 | sum = &null_sum; | |
1658 | ||
1659 | write_int(f, sum->count); | |
1660 | write_int(f, sum->blength); | |
1661 | if (protocol_version >= 27) | |
1662 | write_int(f, sum->s2length); | |
1663 | write_int(f, sum->remainder); | |
1664 | } | |
1665 | ||
20caffd2 | 1666 | /* Sleep after writing to limit I/O bandwidth usage. |
08571358 MP |
1667 | * |
1668 | * @todo Rather than sleeping after each write, it might be better to | |
1669 | * use some kind of averaging. The current algorithm seems to always | |
1670 | * use a bit less bandwidth than specified, because it doesn't make up | |
1671 | * for slow periods. But arguably this is a feature. In addition, we | |
1672 | * ought to take the time used to write the data into account. | |
71e58630 WD |
1673 | * |
1674 | * During some phases of big transfers (file FOO is uptodate) this is | |
1675 | * called with a small bytes_written every time. As the kernel has to | |
1676 | * round small waits up to guarantee that we actually wait at least the | |
1677 | * requested number of microseconds, this can become grossly inaccurate. | |
1678 | * We therefore keep track of the bytes we've written over time and only | |
20caffd2 | 1679 | * sleep when the accumulated delay is at least 1 tenth of a second. */ |
08571358 MP |
1680 | static void sleep_for_bwlimit(int bytes_written) |
1681 | { | |
71e58630 | 1682 | static struct timeval prior_tv; |
0f78b815 | 1683 | static long total_written = 0; |
71e58630 WD |
1684 | struct timeval tv, start_tv; |
1685 | long elapsed_usec, sleep_usec; | |
1686 | ||
1687 | #define ONE_SEC 1000000L /* # of microseconds in a second */ | |
08571358 | 1688 | |
0f78b815 | 1689 | total_written += bytes_written; |
71e58630 WD |
1690 | |
1691 | gettimeofday(&start_tv, NULL); | |
1692 | if (prior_tv.tv_sec) { | |
1693 | elapsed_usec = (start_tv.tv_sec - prior_tv.tv_sec) * ONE_SEC | |
1694 | + (start_tv.tv_usec - prior_tv.tv_usec); | |
1695 | total_written -= elapsed_usec * bwlimit / (ONE_SEC/1024); | |
1696 | if (total_written < 0) | |
1697 | total_written = 0; | |
1698 | } | |
3151cbae | 1699 | |
71e58630 WD |
1700 | sleep_usec = total_written * (ONE_SEC/1024) / bwlimit; |
1701 | if (sleep_usec < ONE_SEC / 10) { | |
1702 | prior_tv = start_tv; | |
1703 | return; | |
1704 | } | |
08571358 | 1705 | |
71e58630 WD |
1706 | tv.tv_sec = sleep_usec / ONE_SEC; |
1707 | tv.tv_usec = sleep_usec % ONE_SEC; | |
98b332ed | 1708 | select(0, NULL, NULL, NULL, &tv); |
71e58630 WD |
1709 | |
1710 | gettimeofday(&prior_tv, NULL); | |
1711 | elapsed_usec = (prior_tv.tv_sec - start_tv.tv_sec) * ONE_SEC | |
1712 | + (prior_tv.tv_usec - start_tv.tv_usec); | |
1713 | total_written = (sleep_usec - elapsed_usec) * bwlimit / (ONE_SEC/1024); | |
08571358 MP |
1714 | } |
1715 | ||
20caffd2 | 1716 | void io_flush(int flush_it_all) |
d6dead6b | 1717 | { |
20caffd2 WD |
1718 | if (iobuf.out.len > iobuf.out_empty_len) { |
1719 | if (flush_it_all) /* FULL_FLUSH: flush everything in the output buffers */ | |
1720 | perform_io(iobuf.out.size - iobuf.out_empty_len, PIO_NEED_OUTROOM); | |
1721 | else /* NORMAL_FLUSH: flush at least 1 byte */ | |
1722 | perform_io(iobuf.out.size - iobuf.out.len + 1, PIO_NEED_OUTROOM); | |
d6dead6b | 1723 | } |
20caffd2 WD |
1724 | if (iobuf.msg.len) |
1725 | perform_io(iobuf.msg.size, PIO_NEED_MSGROOM); | |
d6dead6b | 1726 | } |
720b47f2 | 1727 | |
3a993aa4 | 1728 | void write_shortint(int f, unsigned short x) |
9361f839 | 1729 | { |
3a993aa4 WD |
1730 | char b[2]; |
1731 | b[0] = (char)x; | |
1732 | b[1] = (char)(x >> 8); | |
20caffd2 | 1733 | write_buf(f, b, 2); |
9361f839 WD |
1734 | } |
1735 | ||
351e23ad WD |
1736 | void write_int(int f, int32 x) |
1737 | { | |
1738 | char b[4]; | |
1739 | SIVAL(b, 0, x); | |
20caffd2 | 1740 | write_buf(f, b, 4); |
351e23ad WD |
1741 | } |
1742 | ||
f31514ad | 1743 | void write_varint(int f, int32 x) |
1c3344a1 WD |
1744 | { |
1745 | char b[5]; | |
351e23ad WD |
1746 | uchar bit; |
1747 | int cnt = 4; | |
1748 | ||
1749 | SIVAL(b, 1, x); | |
1750 | ||
1751 | while (cnt > 1 && b[cnt] == 0) | |
1752 | cnt--; | |
1753 | bit = ((uchar)1<<(7-cnt+1)); | |
1754 | if (CVAL(b, cnt) >= bit) { | |
1755 | cnt++; | |
1756 | *b = ~(bit-1); | |
1757 | } else if (cnt > 1) | |
1758 | *b = b[cnt] | ~(bit*2-1); | |
1759 | else | |
1760 | *b = b[cnt]; | |
1761 | ||
20caffd2 | 1762 | write_buf(f, b, cnt); |
1c3344a1 WD |
1763 | } |
1764 | ||
351e23ad | 1765 | void write_varlong(int f, int64 x, uchar min_bytes) |
720b47f2 | 1766 | { |
351e23ad WD |
1767 | char b[9]; |
1768 | uchar bit; | |
1769 | int cnt = 8; | |
1770 | ||
1771 | SIVAL(b, 1, x); | |
1772 | #if SIZEOF_INT64 >= 8 | |
1773 | SIVAL(b, 5, x >> 32); | |
1774 | #else | |
1775 | if (x <= 0x7FFFFFFF && x >= 0) | |
1776 | memset(b + 5, 0, 4); | |
1777 | else { | |
1778 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); | |
1779 | exit_cleanup(RERR_UNSUPPORTED); | |
1780 | } | |
1781 | #endif | |
1782 | ||
1783 | while (cnt > min_bytes && b[cnt] == 0) | |
1784 | cnt--; | |
1785 | bit = ((uchar)1<<(7-cnt+min_bytes)); | |
1786 | if (CVAL(b, cnt) >= bit) { | |
1787 | cnt++; | |
1788 | *b = ~(bit-1); | |
1789 | } else if (cnt > min_bytes) | |
1790 | *b = b[cnt] | ~(bit*2-1); | |
1791 | else | |
1792 | *b = b[cnt]; | |
1793 | ||
20caffd2 | 1794 | write_buf(f, b, cnt); |
720b47f2 AT |
1795 | } |
1796 | ||
7a24c346 MP |
1797 | /* |
1798 | * Note: int64 may actually be a 32-bit type if ./configure couldn't find any | |
1799 | * 64-bit types on this platform. | |
1800 | */ | |
71c46176 | 1801 | void write_longint(int f, int64 x) |
3a6a366f | 1802 | { |
351e23ad | 1803 | char b[12], * const s = b+4; |
3a6a366f | 1804 | |
351e23ad WD |
1805 | SIVAL(s, 0, x); |
1806 | if (x <= 0x7FFFFFFF && x >= 0) { | |
20caffd2 | 1807 | write_buf(f, s, 4); |
351e23ad WD |
1808 | return; |
1809 | } | |
3a6a366f | 1810 | |
4ea4acf1 | 1811 | #if SIZEOF_INT64 < 8 |
351e23ad WD |
1812 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); |
1813 | exit_cleanup(RERR_UNSUPPORTED); | |
4ea4acf1 | 1814 | #else |
351e23ad WD |
1815 | memset(b, 0xFF, 4); |
1816 | SIVAL(s, 4, x >> 32); | |
20caffd2 | 1817 | write_buf(f, b, 12); |
4ea4acf1 | 1818 | #endif |
3a6a366f AT |
1819 | } |
1820 | ||
4a19c3b2 | 1821 | void write_buf(int f, const char *buf, size_t len) |
720b47f2 | 1822 | { |
20caffd2 WD |
1823 | size_t pos, siz; |
1824 | ||
1825 | if (f != iobuf.out_fd) { | |
1826 | safe_write(f, buf, len); | |
1827 | goto batch_copy; | |
1828 | } | |
1829 | ||
1830 | if (iobuf.out.size - iobuf.out.len < len) | |
1831 | perform_io(len, PIO_NEED_OUTROOM); | |
1832 | ||
1833 | pos = iobuf.out.pos + iobuf.out.len; /* Must be set after any flushing. */ | |
1834 | if (pos >= iobuf.out.size) | |
1835 | pos -= iobuf.out.size; | |
1836 | ||
1837 | /* Handle a split copy if we wrap around the end of the circular buffer. */ | |
1838 | if (pos >= iobuf.out.pos && (siz = iobuf.out.size - pos) < len) { | |
1839 | memcpy(iobuf.out.buf + pos, buf, siz); | |
1840 | memcpy(iobuf.out.buf, buf + siz, len - siz); | |
1841 | } else | |
1842 | memcpy(iobuf.out.buf + pos, buf, len); | |
1843 | ||
1844 | iobuf.out.len += len; | |
1845 | ||
1846 | batch_copy: | |
1847 | if (f == write_batch_monitor_out) | |
1848 | safe_write(batch_fd, buf, len); | |
720b47f2 AT |
1849 | } |
1850 | ||
20caffd2 | 1851 | /* Write a string to the connection */ |
4a19c3b2 | 1852 | void write_sbuf(int f, const char *buf) |
f0fca04e | 1853 | { |
20caffd2 | 1854 | write_buf(f, buf, strlen(buf)); |
f0fca04e AT |
1855 | } |
1856 | ||
9361f839 | 1857 | void write_byte(int f, uchar c) |
182dca5c | 1858 | { |
20caffd2 | 1859 | write_buf(f, (char *)&c, 1); |
182dca5c AT |
1860 | } |
1861 | ||
4a19c3b2 | 1862 | void write_vstring(int f, const char *str, int len) |
46e99b09 WD |
1863 | { |
1864 | uchar lenbuf[3], *lb = lenbuf; | |
1865 | ||
1866 | if (len > 0x7F) { | |
1867 | if (len > 0x7FFF) { | |
1868 | rprintf(FERROR, | |
1869 | "attempting to send over-long vstring (%d > %d)\n", | |
1870 | len, 0x7FFF); | |
1871 | exit_cleanup(RERR_PROTOCOL); | |
1872 | } | |
1873 | *lb++ = len / 0x100 + 0x80; | |
1874 | } | |
1875 | *lb = len; | |
1876 | ||
20caffd2 | 1877 | write_buf(f, (char*)lenbuf, lb - lenbuf + 1); |
46e99b09 | 1878 | if (len) |
20caffd2 | 1879 | write_buf(f, str, len); |
46e99b09 WD |
1880 | } |
1881 | ||
8a65e0ce WD |
1882 | /* Send a file-list index using a byte-reduction method. */ |
1883 | void write_ndx(int f, int32 ndx) | |
1884 | { | |
1885 | static int32 prev_positive = -1, prev_negative = 1; | |
1886 | int32 diff, cnt = 0; | |
1887 | char b[6]; | |
1888 | ||
1889 | if (protocol_version < 30 || read_batch) { | |
1890 | write_int(f, ndx); | |
1891 | return; | |
1892 | } | |
1893 | ||
1894 | /* Send NDX_DONE as a single-byte 0 with no side effects. Send | |
1895 | * negative nums as a positive after sending a leading 0xFF. */ | |
1896 | if (ndx >= 0) { | |
1897 | diff = ndx - prev_positive; | |
1898 | prev_positive = ndx; | |
1899 | } else if (ndx == NDX_DONE) { | |
1900 | *b = 0; | |
20caffd2 | 1901 | write_buf(f, b, 1); |
8a65e0ce WD |
1902 | return; |
1903 | } else { | |
1904 | b[cnt++] = (char)0xFF; | |
1905 | ndx = -ndx; | |
1906 | diff = ndx - prev_negative; | |
1907 | prev_negative = ndx; | |
1908 | } | |
1909 | ||
1910 | /* A diff of 1 - 253 is sent as a one-byte diff; a diff of 254 - 32767 | |
1911 | * or 0 is sent as a 0xFE + a two-byte diff; otherwise we send 0xFE | |
1912 | * & all 4 bytes of the (non-negative) num with the high-bit set. */ | |
1913 | if (diff < 0xFE && diff > 0) | |
1914 | b[cnt++] = (char)diff; | |
1915 | else if (diff < 0 || diff > 0x7FFF) { | |
1916 | b[cnt++] = (char)0xFE; | |
1917 | b[cnt++] = (char)((ndx >> 24) | 0x80); | |
8a65e0ce | 1918 | b[cnt++] = (char)ndx; |
351e23ad WD |
1919 | b[cnt++] = (char)(ndx >> 8); |
1920 | b[cnt++] = (char)(ndx >> 16); | |
8a65e0ce WD |
1921 | } else { |
1922 | b[cnt++] = (char)0xFE; | |
1923 | b[cnt++] = (char)(diff >> 8); | |
1924 | b[cnt++] = (char)diff; | |
1925 | } | |
20caffd2 | 1926 | write_buf(f, b, cnt); |
8a65e0ce WD |
1927 | } |
1928 | ||
1929 | /* Receive a file-list index using a byte-reduction method. */ | |
1930 | int32 read_ndx(int f) | |
1931 | { | |
1932 | static int32 prev_positive = -1, prev_negative = 1; | |
1933 | int32 *prev_ptr, num; | |
1934 | char b[4]; | |
1935 | ||
1936 | if (protocol_version < 30) | |
1937 | return read_int(f); | |
1938 | ||
20caffd2 | 1939 | read_buf(f, b, 1); |
8a65e0ce | 1940 | if (CVAL(b, 0) == 0xFF) { |
20caffd2 | 1941 | read_buf(f, b, 1); |
8a65e0ce WD |
1942 | prev_ptr = &prev_negative; |
1943 | } else if (CVAL(b, 0) == 0) | |
1944 | return NDX_DONE; | |
1945 | else | |
1946 | prev_ptr = &prev_positive; | |
1947 | if (CVAL(b, 0) == 0xFE) { | |
20caffd2 | 1948 | read_buf(f, b, 2); |
8a65e0ce | 1949 | if (CVAL(b, 0) & 0x80) { |
351e23ad WD |
1950 | b[3] = CVAL(b, 0) & ~0x80; |
1951 | b[0] = b[1]; | |
20caffd2 | 1952 | read_buf(f, b+1, 2); |
351e23ad | 1953 | num = IVAL(b, 0); |
8a65e0ce | 1954 | } else |
351e23ad | 1955 | num = (UVAL(b,0)<<8) + UVAL(b,1) + *prev_ptr; |
8a65e0ce | 1956 | } else |
351e23ad | 1957 | num = UVAL(b, 0) + *prev_ptr; |
8a65e0ce WD |
1958 | *prev_ptr = num; |
1959 | if (prev_ptr == &prev_negative) | |
1960 | num = -num; | |
1961 | return num; | |
1962 | } | |
1963 | ||
67b8f3df WD |
1964 | /* Read a line of up to bufsiz-1 characters into buf. Strips |
1965 | * the (required) trailing newline and all carriage returns. | |
1966 | * Returns 1 for success; 0 for I/O error or truncation. */ | |
20caffd2 | 1967 | int read_line_old(int fd, char *buf, size_t bufsiz) |
f0fca04e | 1968 | { |
67b8f3df WD |
1969 | bufsiz--; /* leave room for the null */ |
1970 | while (bufsiz > 0) { | |
20caffd2 WD |
1971 | assert(fd != iobuf.in_fd); |
1972 | if (safe_read(fd, buf, 1) == 0) | |
1973 | return 0; | |
1974 | if (*buf == '\0') | |
914cc65c | 1975 | return 0; |
20caffd2 | 1976 | if (*buf == '\n') |
f0fca04e | 1977 | break; |
20caffd2 | 1978 | if (*buf != '\r') { |
f0fca04e | 1979 | buf++; |
67b8f3df | 1980 | bufsiz--; |
f0fca04e AT |
1981 | } |
1982 | } | |
6ed6d7f5 | 1983 | *buf = '\0'; |
67b8f3df | 1984 | return bufsiz > 0; |
f0fca04e AT |
1985 | } |
1986 | ||
f0fca04e AT |
1987 | void io_printf(int fd, const char *format, ...) |
1988 | { | |
d62bcc17 | 1989 | va_list ap; |
33544bf4 | 1990 | char buf[BIGPATHBUFLEN]; |
f0fca04e | 1991 | int len; |
3151cbae | 1992 | |
f0fca04e | 1993 | va_start(ap, format); |
3151cbae | 1994 | len = vsnprintf(buf, sizeof buf, format, ap); |
f0fca04e AT |
1995 | va_end(ap); |
1996 | ||
f89b9368 WD |
1997 | if (len < 0) |
1998 | exit_cleanup(RERR_STREAMIO); | |
f0fca04e | 1999 | |
33544bf4 WD |
2000 | if (len > (int)sizeof buf) { |
2001 | rprintf(FERROR, "io_printf() was too long for the buffer.\n"); | |
2002 | exit_cleanup(RERR_STREAMIO); | |
2003 | } | |
2004 | ||
f0fca04e AT |
2005 | write_sbuf(fd, buf); |
2006 | } | |
8d9dc9f9 | 2007 | |
20caffd2 WD |
2008 | /* Setup for multiplexing a MSG_* stream with the data stream. */ |
2009 | void io_start_multiplex_out(int fd) | |
8d9dc9f9 | 2010 | { |
20caffd2 WD |
2011 | if (msgs2stderr && DEBUG_GTE(IO, 2)) |
2012 | rprintf(FINFO, "[%s] io_start_multiplex_out(%d)\n", who_am_i(), fd); | |
8d9dc9f9 | 2013 | |
20caffd2 WD |
2014 | io_flush(FULL_FLUSH); |
2015 | ||
2016 | iobuf.out_empty_len = 4; /* See also OUT_MULTIPLEXED */ | |
2017 | io_start_buffering_out(fd); | |
2018 | ||
2019 | iobuf.raw_data_header_pos = iobuf.out.pos + iobuf.out.len; | |
2020 | iobuf.out.len += 4; | |
8d9dc9f9 AT |
2021 | } |
2022 | ||
20caffd2 WD |
2023 | /* Setup for multiplexing a MSG_* stream with the data stream. */ |
2024 | void io_start_multiplex_in(int fd) | |
8d9dc9f9 | 2025 | { |
20caffd2 WD |
2026 | if (msgs2stderr && DEBUG_GTE(IO, 2)) |
2027 | rprintf(FINFO, "[%s] io_start_multiplex_in(%d)\n", who_am_i(), fd); | |
2028 | ||
2029 | iobuf.in_multiplexed = True; /* See also IN_MULTIPLEXED */ | |
2030 | io_start_buffering_in(fd); | |
8d9dc9f9 AT |
2031 | } |
2032 | ||
20caffd2 | 2033 | void io_end_multiplex_in(BOOL free_buffers) |
7f459268 | 2034 | { |
20caffd2 WD |
2035 | if (DEBUG_GTE(IO, 2)) { |
2036 | rprintf(FINFO, "[%s] io_end_multiplex_in(%s)\n", | |
2037 | who_am_i(), free_buffers ? "True" : "False"); | |
2038 | } | |
2039 | ||
2040 | iobuf.in_multiplexed = False; | |
2041 | iobuf.raw_input_ends_before = 0; | |
2042 | io_end_buffering_in(free_buffers); | |
7f459268 WD |
2043 | } |
2044 | ||
20caffd2 WD |
2045 | /* Stop output multiplexing. */ |
2046 | void io_end_multiplex_out(BOOL free_buffers) | |
554e0a8d | 2047 | { |
20caffd2 WD |
2048 | if (DEBUG_GTE(IO, 2)) { |
2049 | rprintf(FINFO, "[%s] io_end_multiplex_out(%s)\n", | |
2050 | who_am_i(), free_buffers ? "True" : "False"); | |
2051 | } | |
2052 | ||
2053 | io_end_buffering_out(free_buffers); | |
2054 | iobuf.out_empty_len = 0; | |
554e0a8d AT |
2055 | } |
2056 | ||
b9f592fb WD |
2057 | void start_write_batch(int fd) |
2058 | { | |
2059 | /* Some communication has already taken place, but we don't | |
2060 | * enable batch writing until here so that we can write a | |
2061 | * canonical record of the communication even though the | |
2062 | * actual communication so far depends on whether a daemon | |
2063 | * is involved. */ | |
2064 | write_int(batch_fd, protocol_version); | |
71456d30 WD |
2065 | if (protocol_version >= 30) |
2066 | write_byte(batch_fd, inc_recurse); | |
b9f592fb | 2067 | write_int(batch_fd, checksum_seed); |
b9f592fb WD |
2068 | |
2069 | if (am_sender) | |
2070 | write_batch_monitor_out = fd; | |
2071 | else | |
2072 | write_batch_monitor_in = fd; | |
2073 | } | |
2074 | ||
2075 | void stop_write_batch(void) | |
2076 | { | |
2077 | write_batch_monitor_out = -1; | |
2078 | write_batch_monitor_in = -1; | |
2079 | } |