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; |
3ea6e0e7 | 44 | extern int inc_recurse; |
8ef246e0 | 45 | extern int io_error; |
e626b29e | 46 | extern int eol_nulls; |
8ef246e0 | 47 | extern int flist_eof; |
ce827c3e WD |
48 | extern int file_total; |
49 | extern int file_old_total; | |
7f9bf6b7 | 50 | extern int list_only; |
3b0a30eb | 51 | extern int read_batch; |
ba525f77 | 52 | extern int protect_args; |
b9f592fb WD |
53 | extern int checksum_seed; |
54 | extern int protocol_version; | |
47c11975 | 55 | extern int remove_source_files; |
cdf236aa | 56 | extern int preserve_hard_links; |
a800434a | 57 | extern struct stats stats; |
19531e1f | 58 | extern struct file_list *cur_flist; |
332cf6df | 59 | #ifdef ICONV_OPTION |
ba525f77 | 60 | extern int filesfrom_convert; |
332cf6df WD |
61 | extern iconv_t ic_send, ic_recv; |
62 | #endif | |
720b47f2 | 63 | |
93465f51 WD |
64 | int csum_length = SHORT_SUM_LENGTH; /* initial value */ |
65 | int allowed_lull = 0; | |
9e2409ab | 66 | int ignore_timeout = 0; |
b9f592fb | 67 | int batch_fd = -1; |
04c722d5 | 68 | int msgdone_cnt = 0; |
805edf9d | 69 | |
cb2e1f18 | 70 | /* Ignore an EOF error if non-zero. See whine_about_eof(). */ |
574c2500 | 71 | int kluge_around_eof = 0; |
7a55d06e | 72 | |
d17e1dd2 WD |
73 | int msg_fd_in = -1; |
74 | int msg_fd_out = -1; | |
cdf236aa WD |
75 | int sock_f_in = -1; |
76 | int sock_f_out = -1; | |
7a55d06e | 77 | |
8ef246e0 WD |
78 | static int iobuf_f_in = -1; |
79 | static char *iobuf_in; | |
80 | static size_t iobuf_in_siz; | |
81 | static size_t iobuf_in_ndx; | |
82 | static size_t iobuf_in_remaining; | |
83 | ||
84 | static int iobuf_f_out = -1; | |
85 | static char *iobuf_out; | |
86 | static int iobuf_out_cnt; | |
87 | ||
88 | int flist_forward_from = -1; | |
89 | ||
1f75bb10 WD |
90 | static int io_multiplexing_out; |
91 | static int io_multiplexing_in; | |
3b0a30eb WD |
92 | static time_t last_io_in; |
93 | static time_t last_io_out; | |
1f75bb10 WD |
94 | static int no_flush; |
95 | ||
b9f592fb WD |
96 | static int write_batch_monitor_in = -1; |
97 | static int write_batch_monitor_out = -1; | |
98 | ||
56014c8c WD |
99 | static int io_filesfrom_f_in = -1; |
100 | static int io_filesfrom_f_out = -1; | |
ba525f77 WD |
101 | static xbuf ff_buf = EMPTY_XBUF; |
102 | static char ff_lastchar; | |
332cf6df | 103 | #ifdef ICONV_OPTION |
ba525f77 | 104 | static xbuf iconv_buf = EMPTY_XBUF; |
332cf6df | 105 | #endif |
0b789446 | 106 | static int defer_forwarding_messages = 0, keep_defer_forwarding = 0; |
3b0a30eb | 107 | static int select_timeout = SELECT_TIMEOUT; |
d6081c82 WD |
108 | static int active_filecnt = 0; |
109 | static OFF_T active_bytecnt = 0; | |
7f9bf6b7 | 110 | static int first_message = 1; |
720b47f2 | 111 | |
351e23ad WD |
112 | static char int_byte_extra[64] = { |
113 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (00 - 3F)/4 */ | |
114 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (40 - 7F)/4 */ | |
115 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* (80 - BF)/4 */ | |
116 | 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 5, 6, /* (C0 - FF)/4 */ | |
482f48cc WD |
117 | }; |
118 | ||
7f9bf6b7 WD |
119 | #define REMOTE_OPTION_ERROR "rsync: on remote machine: -" |
120 | #define REMOTE_OPTION_ERROR2 ": unknown option" | |
121 | ||
29349024 WD |
122 | enum festatus { FES_SUCCESS, FES_REDO, FES_NO_SEND }; |
123 | ||
dde5b772 | 124 | static void readfd(int fd, char *buffer, size_t N); |
8ef246e0 WD |
125 | static void writefd(int fd, const char *buf, size_t len); |
126 | static void writefd_unbuffered(int fd, const char *buf, size_t len); | |
332cf6df | 127 | static void mplex_write(int fd, enum msgcode code, const char *buf, size_t len, int convert); |
ff41a59f | 128 | |
e0c572c5 | 129 | static flist_ndx_list redo_list, hlink_list; |
d17e1dd2 | 130 | |
08c88178 WD |
131 | struct msg_list_item { |
132 | struct msg_list_item *next; | |
332cf6df | 133 | char convert; |
954bbed8 | 134 | char buf[1]; |
d17e1dd2 WD |
135 | }; |
136 | ||
08c88178 WD |
137 | struct msg_list { |
138 | struct msg_list_item *head, *tail; | |
139 | }; | |
140 | ||
e4c877cf | 141 | static struct msg_list msg_queue; |
d17e1dd2 | 142 | |
29349024 WD |
143 | static void got_flist_entry_status(enum festatus status, const char *buf) |
144 | { | |
145 | int ndx = IVAL(buf, 0); | |
e982d591 | 146 | struct file_list *flist = flist_for_ndx(ndx, "got_flist_entry_status"); |
29349024 WD |
147 | |
148 | if (remove_source_files) { | |
149 | active_filecnt--; | |
150 | active_bytecnt -= F_LENGTH(flist->files[ndx - flist->ndx_start]); | |
151 | } | |
152 | ||
153 | if (inc_recurse) | |
154 | flist->in_progress--; | |
155 | ||
156 | switch (status) { | |
157 | case FES_SUCCESS: | |
158 | if (remove_source_files) | |
159 | send_msg(MSG_SUCCESS, buf, 4, 0); | |
160 | if (preserve_hard_links) { | |
161 | struct file_struct *file = flist->files[ndx - flist->ndx_start]; | |
37ce1679 | 162 | if (F_IS_HLINKED(file)) { |
29349024 | 163 | flist_ndx_push(&hlink_list, ndx); |
37ce1679 WD |
164 | flist->in_progress++; |
165 | } | |
29349024 WD |
166 | } |
167 | break; | |
168 | case FES_REDO: | |
8ab02ccd WD |
169 | if (read_batch) { |
170 | if (inc_recurse) | |
171 | flist->in_progress++; | |
172 | break; | |
173 | } | |
29349024 WD |
174 | if (inc_recurse) |
175 | flist->to_redo++; | |
176 | flist_ndx_push(&redo_list, ndx); | |
177 | break; | |
178 | case FES_NO_SEND: | |
179 | break; | |
180 | } | |
181 | } | |
182 | ||
8d9dc9f9 AT |
183 | static void check_timeout(void) |
184 | { | |
185 | time_t t; | |
90ba34e2 | 186 | |
9e2409ab | 187 | if (!io_timeout || ignore_timeout) |
d17e1dd2 | 188 | return; |
8d9dc9f9 | 189 | |
3b0a30eb WD |
190 | if (!last_io_in) { |
191 | last_io_in = time(NULL); | |
8d9dc9f9 AT |
192 | return; |
193 | } | |
194 | ||
195 | t = time(NULL); | |
196 | ||
3b0a30eb | 197 | if (t - last_io_in >= io_timeout) { |
0adb99b9 | 198 | if (!am_server && !am_daemon) { |
4ccfd96c | 199 | rprintf(FERROR, "io timeout after %d seconds -- exiting\n", |
3b0a30eb | 200 | (int)(t-last_io_in)); |
0adb99b9 | 201 | } |
65417579 | 202 | exit_cleanup(RERR_TIMEOUT); |
8d9dc9f9 AT |
203 | } |
204 | } | |
205 | ||
1f75bb10 WD |
206 | /* Note the fds used for the main socket (which might really be a pipe |
207 | * for a local transfer, but we can ignore that). */ | |
208 | void io_set_sock_fds(int f_in, int f_out) | |
209 | { | |
210 | sock_f_in = f_in; | |
211 | sock_f_out = f_out; | |
212 | } | |
213 | ||
3b0a30eb WD |
214 | void set_io_timeout(int secs) |
215 | { | |
216 | io_timeout = secs; | |
217 | ||
218 | if (!io_timeout || io_timeout > SELECT_TIMEOUT) | |
219 | select_timeout = SELECT_TIMEOUT; | |
220 | else | |
221 | select_timeout = io_timeout; | |
222 | ||
223 | allowed_lull = read_batch ? 0 : (io_timeout + 1) / 2; | |
224 | } | |
225 | ||
98f8c9a5 WD |
226 | /* Setup the fd used to receive MSG_* messages. Only needed during the |
227 | * early stages of being a local sender (up through the sending of the | |
228 | * file list) or when we're the generator (to fetch the messages from | |
229 | * the receiver). */ | |
d17e1dd2 WD |
230 | void set_msg_fd_in(int fd) |
231 | { | |
232 | msg_fd_in = fd; | |
233 | } | |
234 | ||
98f8c9a5 WD |
235 | /* Setup the fd used to send our MSG_* messages. Only needed when |
236 | * we're the receiver (to send our messages to the generator). */ | |
d17e1dd2 WD |
237 | void set_msg_fd_out(int fd) |
238 | { | |
239 | msg_fd_out = fd; | |
240 | set_nonblocking(msg_fd_out); | |
241 | } | |
242 | ||
243 | /* Add a message to the pending MSG_* list. */ | |
332cf6df | 244 | static void msg_list_add(struct msg_list *lst, int code, const char *buf, int len, int convert) |
554e0a8d | 245 | { |
954bbed8 WD |
246 | struct msg_list_item *m; |
247 | int sz = len + 4 + sizeof m[0] - 1; | |
d17e1dd2 | 248 | |
954bbed8 | 249 | if (!(m = (struct msg_list_item *)new_array(char, sz))) |
c6816b94 | 250 | out_of_memory("msg_list_add"); |
954bbed8 | 251 | m->next = NULL; |
332cf6df | 252 | m->convert = convert; |
954bbed8 WD |
253 | SIVAL(m->buf, 0, ((code+MPLEX_BASE)<<24) | len); |
254 | memcpy(m->buf + 4, buf, len); | |
255 | if (lst->tail) | |
256 | lst->tail->next = m; | |
d17e1dd2 | 257 | else |
954bbed8 WD |
258 | lst->head = m; |
259 | lst->tail = m; | |
554e0a8d AT |
260 | } |
261 | ||
0b789446 WD |
262 | static inline int flush_a_msg(int fd) |
263 | { | |
264 | struct msg_list_item *m = msg_queue.head; | |
265 | int len = IVAL(m->buf, 0) & 0xFFFFFF; | |
266 | int tag = *((uchar*)m->buf+3) - MPLEX_BASE; | |
267 | ||
268 | if (!(msg_queue.head = m->next)) | |
269 | msg_queue.tail = NULL; | |
270 | ||
271 | defer_forwarding_messages++; | |
272 | mplex_write(fd, tag, m->buf + 4, len, m->convert); | |
273 | defer_forwarding_messages--; | |
274 | ||
275 | free(m); | |
276 | ||
277 | return len; | |
278 | } | |
279 | ||
e4c877cf | 280 | static void msg_flush(void) |
3be97bf9 | 281 | { |
e4c877cf | 282 | if (am_generator) { |
0b789446 WD |
283 | while (msg_queue.head && io_multiplexing_out) |
284 | stats.total_written += flush_a_msg(sock_f_out) + 4; | |
e4c877cf | 285 | } else { |
0b789446 WD |
286 | while (msg_queue.head) |
287 | (void)flush_a_msg(msg_fd_out); | |
3be97bf9 WD |
288 | } |
289 | } | |
290 | ||
7f9bf6b7 WD |
291 | static void check_for_d_option_error(const char *msg) |
292 | { | |
293 | static char rsync263_opts[] = "BCDHIKLPRSTWabceghlnopqrtuvxz"; | |
294 | char *colon; | |
295 | int saw_d = 0; | |
296 | ||
297 | if (*msg != 'r' | |
298 | || strncmp(msg, REMOTE_OPTION_ERROR, sizeof REMOTE_OPTION_ERROR - 1) != 0) | |
299 | return; | |
300 | ||
301 | msg += sizeof REMOTE_OPTION_ERROR - 1; | |
302 | if (*msg == '-' || (colon = strchr(msg, ':')) == NULL | |
303 | || strncmp(colon, REMOTE_OPTION_ERROR2, sizeof REMOTE_OPTION_ERROR2 - 1) != 0) | |
304 | return; | |
305 | ||
306 | for ( ; *msg != ':'; msg++) { | |
307 | if (*msg == 'd') | |
308 | saw_d = 1; | |
309 | else if (*msg == 'e') | |
310 | break; | |
311 | else if (strchr(rsync263_opts, *msg) == NULL) | |
312 | return; | |
313 | } | |
314 | ||
315 | if (saw_d) { | |
316 | rprintf(FWARNING, | |
73cb6738 | 317 | "*** Try using \"--old-d\" if remote rsync is <= 2.6.3 ***\n"); |
7f9bf6b7 WD |
318 | } |
319 | } | |
320 | ||
98f8c9a5 WD |
321 | /* Read a message from the MSG_* fd and handle it. This is called either |
322 | * during the early stages of being a local sender (up through the sending | |
323 | * of the file list) or when we're the generator (to fetch the messages | |
324 | * from the receiver). */ | |
d17e1dd2 | 325 | static void read_msg_fd(void) |
554e0a8d | 326 | { |
f9c6b3e7 | 327 | char buf[2048]; |
06ce139f | 328 | size_t n; |
8ef246e0 | 329 | struct file_list *flist; |
d17e1dd2 | 330 | int fd = msg_fd_in; |
ff41a59f AT |
331 | int tag, len; |
332 | ||
00bdf899 | 333 | /* Temporarily disable msg_fd_in. This is needed to avoid looping back |
af436313 | 334 | * to this routine from writefd_unbuffered(). */ |
3be97bf9 | 335 | no_flush++; |
d17e1dd2 | 336 | msg_fd_in = -1; |
be21e29c | 337 | defer_forwarding_messages++; |
554e0a8d | 338 | |
dde5b772 | 339 | readfd(fd, buf, 4); |
ff41a59f AT |
340 | tag = IVAL(buf, 0); |
341 | ||
342 | len = tag & 0xFFFFFF; | |
d17e1dd2 | 343 | tag = (tag >> 24) - MPLEX_BASE; |
ff41a59f | 344 | |
d17e1dd2 WD |
345 | switch (tag) { |
346 | case MSG_DONE: | |
cc7b86bf | 347 | if (len < 0 || len > 1 || !am_generator) { |
8ef246e0 WD |
348 | invalid_msg: |
349 | rprintf(FERROR, "invalid message %d:%d [%s%s]\n", | |
350 | tag, len, who_am_i(), | |
3ea6e0e7 | 351 | inc_recurse ? "/inc" : ""); |
d17e1dd2 | 352 | exit_cleanup(RERR_STREAMIO); |
13c7bcbb | 353 | } |
cc7b86bf WD |
354 | if (len) { |
355 | readfd(fd, buf, len); | |
351e23ad | 356 | stats.total_read = read_varlong(fd, 3); |
cc7b86bf | 357 | } |
04c722d5 | 358 | msgdone_cnt++; |
d17e1dd2 WD |
359 | break; |
360 | case MSG_REDO: | |
8ef246e0 WD |
361 | if (len != 4 || !am_generator) |
362 | goto invalid_msg; | |
dde5b772 | 363 | readfd(fd, buf, 4); |
29349024 | 364 | got_flist_entry_status(FES_REDO, buf); |
8ef246e0 WD |
365 | break; |
366 | case MSG_FLIST: | |
3ea6e0e7 | 367 | if (len != 4 || !am_generator || !inc_recurse) |
8ef246e0 | 368 | goto invalid_msg; |
dde5b772 | 369 | readfd(fd, buf, 4); |
8ef246e0 WD |
370 | /* Read extra file list from receiver. */ |
371 | assert(iobuf_in != NULL); | |
372 | assert(iobuf_f_in == fd); | |
951e826b | 373 | if (DEBUG_GTE(FLIST, 2)) { |
1faa1a6d WD |
374 | rprintf(FINFO, "[%s] receiving flist for dir %d\n", |
375 | who_am_i(), IVAL(buf,0)); | |
376 | } | |
8ef246e0 WD |
377 | flist = recv_file_list(fd); |
378 | flist->parent_ndx = IVAL(buf,0); | |
da131912 WD |
379 | #ifdef SUPPORT_HARD_LINKS |
380 | if (preserve_hard_links) | |
381 | match_hard_links(flist); | |
382 | #endif | |
8ef246e0 WD |
383 | break; |
384 | case MSG_FLIST_EOF: | |
3ea6e0e7 | 385 | if (len != 0 || !am_generator || !inc_recurse) |
8ef246e0 WD |
386 | goto invalid_msg; |
387 | flist_eof = 1; | |
d17e1dd2 | 388 | break; |
e5f35681 WD |
389 | case MSG_IO_ERROR: |
390 | if (len != 4) | |
391 | goto invalid_msg; | |
392 | readfd(fd, buf, len); | |
393 | io_error |= IVAL(buf, 0); | |
394 | break; | |
0d67e00a | 395 | case MSG_DELETED: |
8ef246e0 WD |
396 | if (len >= (int)sizeof buf || !am_generator) |
397 | goto invalid_msg; | |
dde5b772 | 398 | readfd(fd, buf, len); |
332cf6df | 399 | send_msg(MSG_DELETED, buf, len, 1); |
0d67e00a | 400 | break; |
9981c27e | 401 | case MSG_SUCCESS: |
8ef246e0 WD |
402 | if (len != 4 || !am_generator) |
403 | goto invalid_msg; | |
29349024 WD |
404 | readfd(fd, buf, 4); |
405 | got_flist_entry_status(FES_SUCCESS, buf); | |
8ef246e0 WD |
406 | break; |
407 | case MSG_NO_SEND: | |
408 | if (len != 4 || !am_generator) | |
409 | goto invalid_msg; | |
29349024 WD |
410 | readfd(fd, buf, 4); |
411 | got_flist_entry_status(FES_NO_SEND, buf); | |
9981c27e | 412 | break; |
3f0211b6 | 413 | case MSG_ERROR_SOCKET: |
7c7462cd | 414 | case MSG_ERROR_UTF8: |
64119c79 | 415 | case MSG_CLIENT: |
8ef246e0 WD |
416 | if (!am_generator) |
417 | goto invalid_msg; | |
3f0211b6 | 418 | if (tag == MSG_ERROR_SOCKET) |
8ef246e0 | 419 | io_end_multiplex_out(); |
72f2d1b3 | 420 | /* FALL THROUGH */ |
d17e1dd2 WD |
421 | case MSG_INFO: |
422 | case MSG_ERROR: | |
3f0211b6 WD |
423 | case MSG_ERROR_XFER: |
424 | case MSG_WARNING: | |
d17e1dd2 WD |
425 | case MSG_LOG: |
426 | while (len) { | |
427 | n = len; | |
428 | if (n >= sizeof buf) | |
429 | n = sizeof buf - 1; | |
dde5b772 | 430 | readfd(fd, buf, n); |
332cf6df | 431 | rwrite((enum logcode)tag, buf, n, !am_generator); |
d17e1dd2 WD |
432 | len -= n; |
433 | } | |
434 | break; | |
435 | default: | |
f8b9da1a WD |
436 | rprintf(FERROR, "unknown message %d:%d [%s]\n", |
437 | tag, len, who_am_i()); | |
d17e1dd2 WD |
438 | exit_cleanup(RERR_STREAMIO); |
439 | } | |
440 | ||
3be97bf9 | 441 | no_flush--; |
d17e1dd2 | 442 | msg_fd_in = fd; |
17a4977b | 443 | if (!--defer_forwarding_messages && !no_flush) |
e4c877cf | 444 | msg_flush(); |
d17e1dd2 WD |
445 | } |
446 | ||
d6081c82 | 447 | /* This is used by the generator to limit how many file transfers can |
47c11975 | 448 | * be active at once when --remove-source-files is specified. Without |
d6081c82 WD |
449 | * this, sender-side deletions were mostly happening at the end. */ |
450 | void increment_active_files(int ndx, int itemizing, enum logcode code) | |
451 | { | |
b4de848d WD |
452 | while (1) { |
453 | /* TODO: tune these limits? */ | |
454 | int limit = active_bytecnt >= 128*1024 ? 10 : 50; | |
455 | if (active_filecnt < limit) | |
456 | break; | |
04c722d5 | 457 | check_for_finished_files(itemizing, code, 0); |
b4de848d WD |
458 | if (active_filecnt < limit) |
459 | break; | |
04c722d5 WD |
460 | if (iobuf_out_cnt) |
461 | io_flush(NORMAL_FLUSH); | |
462 | else | |
463 | read_msg_fd(); | |
d6081c82 WD |
464 | } |
465 | ||
466 | active_filecnt++; | |
121bfb2b | 467 | active_bytecnt += F_LENGTH(cur_flist->files[ndx - cur_flist->ndx_start]); |
d6081c82 WD |
468 | } |
469 | ||
3be97bf9 | 470 | /* Write an message to a multiplexed stream. If this fails, rsync exits. */ |
332cf6df | 471 | static void mplex_write(int fd, enum msgcode code, const char *buf, size_t len, int convert) |
d17e1dd2 | 472 | { |
332cf6df | 473 | char buffer[BIGPATHBUFLEN]; /* Oversized for use by iconv code. */ |
3be97bf9 | 474 | size_t n = len; |
d17e1dd2 | 475 | |
332cf6df | 476 | #ifdef ICONV_OPTION |
ee6e80c7 WD |
477 | /* We need to convert buf before doing anything else so that we |
478 | * can include the (converted) byte length in the message header. */ | |
479 | if (convert && ic_send != (iconv_t)-1) { | |
480 | xbuf outbuf, inbuf; | |
481 | ||
482 | INIT_XBUF(outbuf, buffer + 4, 0, sizeof buffer - 4); | |
bb640d32 | 483 | INIT_XBUF(inbuf, (char*)buf, len, (size_t)-1); |
332cf6df | 484 | |
ee6e80c7 WD |
485 | iconvbufs(ic_send, &inbuf, &outbuf, |
486 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE); | |
487 | if (inbuf.len > 0) { | |
488 | rprintf(FERROR, "overflowed conversion buffer in mplex_write"); | |
489 | exit_cleanup(RERR_UNSUPPORTED); | |
490 | } | |
491 | ||
492 | n = len = outbuf.len; | |
493 | } else | |
494 | #endif | |
495 | if (n > 1024 - 4) /* BIGPATHBUFLEN can handle 1024 bytes */ | |
496 | n = 0; /* We'd rather do 2 writes than too much memcpy(). */ | |
3be97bf9 WD |
497 | else |
498 | memcpy(buffer + 4, buf, n); | |
499 | ||
ee6e80c7 WD |
500 | SIVAL(buffer, 0, ((MPLEX_BASE + (int)code)<<24) + len); |
501 | ||
0b789446 | 502 | keep_defer_forwarding++; /* defer_forwarding_messages++ on return */ |
3be97bf9 | 503 | writefd_unbuffered(fd, buffer, n+4); |
0b789446 | 504 | keep_defer_forwarding--; |
3be97bf9 | 505 | |
ee6e80c7 WD |
506 | if (len > n) |
507 | writefd_unbuffered(fd, buf+n, len-n); | |
17a4977b WD |
508 | |
509 | if (!--defer_forwarding_messages && !no_flush) | |
510 | msg_flush(); | |
d17e1dd2 WD |
511 | } |
512 | ||
332cf6df | 513 | int send_msg(enum msgcode code, const char *buf, int len, int convert) |
37f35d89 WD |
514 | { |
515 | if (msg_fd_out < 0) { | |
12ccc73a | 516 | if (!defer_forwarding_messages) |
332cf6df | 517 | return io_multiplex_write(code, buf, len, convert); |
12ccc73a WD |
518 | if (!io_multiplexing_out) |
519 | return 0; | |
332cf6df | 520 | msg_list_add(&msg_queue, code, buf, len, convert); |
12ccc73a | 521 | return 1; |
37f35d89 | 522 | } |
e4c877cf | 523 | if (flist_forward_from >= 0) |
332cf6df | 524 | msg_list_add(&msg_queue, code, buf, len, convert); |
e4c877cf | 525 | else |
332cf6df | 526 | mplex_write(msg_fd_out, code, buf, len, convert); |
12ccc73a | 527 | return 1; |
37f35d89 WD |
528 | } |
529 | ||
155d9206 WD |
530 | void send_msg_int(enum msgcode code, int num) |
531 | { | |
532 | char numbuf[4]; | |
533 | SIVAL(numbuf, 0, num); | |
332cf6df | 534 | send_msg(code, numbuf, 4, 0); |
155d9206 WD |
535 | } |
536 | ||
8ef246e0 | 537 | void wait_for_receiver(void) |
d17e1dd2 | 538 | { |
0b789446 WD |
539 | if (io_flush(FULL_FLUSH)) |
540 | return; | |
541 | read_msg_fd(); | |
8ef246e0 | 542 | } |
554e0a8d | 543 | |
8ef246e0 WD |
544 | int get_redo_num(void) |
545 | { | |
c6816b94 | 546 | return flist_ndx_pop(&redo_list); |
554e0a8d AT |
547 | } |
548 | ||
cdf236aa WD |
549 | int get_hlink_num(void) |
550 | { | |
551 | return flist_ndx_pop(&hlink_list); | |
552 | } | |
553 | ||
56014c8c WD |
554 | /** |
555 | * When we're the receiver and we have a local --files-from list of names | |
556 | * that needs to be sent over the socket to the sender, we have to do two | |
557 | * things at the same time: send the sender a list of what files we're | |
558 | * processing and read the incoming file+info list from the sender. We do | |
559 | * this by augmenting the read_timeout() function to copy this data. It | |
ba525f77 WD |
560 | * uses ff_buf to read a block of data from f_in (when it is ready, since |
561 | * it might be a pipe) and then blast it out f_out (when it is ready to | |
562 | * receive more data). | |
56014c8c WD |
563 | */ |
564 | void io_set_filesfrom_fds(int f_in, int f_out) | |
565 | { | |
566 | io_filesfrom_f_in = f_in; | |
567 | io_filesfrom_f_out = f_out; | |
ba525f77 WD |
568 | alloc_xbuf(&ff_buf, 2048); |
569 | #ifdef ICONV_OPTION | |
570 | if (protect_args) | |
571 | alloc_xbuf(&iconv_buf, 1024); | |
572 | #endif | |
56014c8c | 573 | } |
720b47f2 | 574 | |
cb2e1f18 WD |
575 | /* It's almost always an error to get an EOF when we're trying to read from the |
576 | * network, because the protocol is (for the most part) self-terminating. | |
880da007 | 577 | * |
cb2e1f18 WD |
578 | * There is one case for the receiver when it is at the end of the transfer |
579 | * (hanging around reading any keep-alive packets that might come its way): if | |
580 | * the sender dies before the generator's kill-signal comes through, we can end | |
581 | * up here needing to loop until the kill-signal arrives. In this situation, | |
582 | * kluge_around_eof will be < 0. | |
583 | * | |
584 | * There is another case for older protocol versions (< 24) where the module | |
585 | * listing was not terminated, so we must ignore an EOF error in that case and | |
586 | * exit. In this situation, kluge_around_eof will be > 0. */ | |
1f75bb10 | 587 | static void whine_about_eof(int fd) |
7a55d06e | 588 | { |
574c2500 | 589 | if (kluge_around_eof && fd == sock_f_in) { |
55bb7fff | 590 | int i; |
574c2500 WD |
591 | if (kluge_around_eof > 0) |
592 | exit_cleanup(0); | |
55bb7fff WD |
593 | /* If we're still here after 10 seconds, exit with an error. */ |
594 | for (i = 10*1000/20; i--; ) | |
574c2500 WD |
595 | msleep(20); |
596 | } | |
3151cbae | 597 | |
00bdf899 | 598 | rprintf(FERROR, RSYNC_NAME ": connection unexpectedly closed " |
6d56efa6 | 599 | "(%s bytes received so far) [%s]\n", |
adc2476f | 600 | big_num(stats.total_read), who_am_i()); |
00bdf899 WD |
601 | |
602 | exit_cleanup(RERR_STREAMIO); | |
7a55d06e | 603 | } |
720b47f2 | 604 | |
880da007 | 605 | /** |
6ed6d7f5 | 606 | * Read from a socket with I/O timeout. return the number of bytes |
c3563c46 MP |
607 | * read. If no bytes can be read then exit, never return a number <= 0. |
608 | * | |
8886f8d0 MP |
609 | * TODO: If the remote shell connection fails, then current versions |
610 | * actually report an "unexpected EOF" error here. Since it's a | |
611 | * fairly common mistake to try to use rsh when ssh is required, we | |
612 | * should trap that: if we fail to read any data at all, we should | |
613 | * give a better explanation. We can tell whether the connection has | |
614 | * started by looking e.g. at whether the remote version is known yet. | |
c3563c46 | 615 | */ |
3151cbae | 616 | static int read_timeout(int fd, char *buf, size_t len) |
8d9dc9f9 | 617 | { |
d8aeda1e | 618 | int n, cnt = 0; |
4c36ddbe | 619 | |
dde5b772 | 620 | io_flush(FULL_FLUSH); |
ea2111d1 | 621 | |
d8aeda1e | 622 | while (cnt == 0) { |
7a55d06e | 623 | /* until we manage to read *something* */ |
56014c8c | 624 | fd_set r_fds, w_fds; |
4c36ddbe | 625 | struct timeval tv; |
1ea087a7 | 626 | int maxfd = fd; |
a57873b7 | 627 | int count; |
4c36ddbe | 628 | |
56014c8c | 629 | FD_ZERO(&r_fds); |
a7026ba9 | 630 | FD_ZERO(&w_fds); |
56014c8c | 631 | FD_SET(fd, &r_fds); |
3309507d | 632 | if (io_filesfrom_f_out >= 0) { |
56014c8c | 633 | int new_fd; |
ba525f77 | 634 | if (ff_buf.len == 0) { |
3309507d | 635 | if (io_filesfrom_f_in >= 0) { |
56014c8c WD |
636 | FD_SET(io_filesfrom_f_in, &r_fds); |
637 | new_fd = io_filesfrom_f_in; | |
638 | } else { | |
639 | io_filesfrom_f_out = -1; | |
640 | new_fd = -1; | |
641 | } | |
642 | } else { | |
56014c8c WD |
643 | FD_SET(io_filesfrom_f_out, &w_fds); |
644 | new_fd = io_filesfrom_f_out; | |
645 | } | |
1ea087a7 WD |
646 | if (new_fd > maxfd) |
647 | maxfd = new_fd; | |
554e0a8d AT |
648 | } |
649 | ||
ce827c3e WD |
650 | if (am_sender && inc_recurse && !flist_eof && !defer_forwarding_messages && !cnt |
651 | && file_total - file_old_total < MAX_FILECNT_LOOKAHEAD | |
652 | && file_total - file_old_total >= MIN_FILECNT_LOOKAHEAD) | |
653 | tv.tv_sec = 0; | |
654 | else | |
655 | tv.tv_sec = select_timeout; | |
4c36ddbe AT |
656 | tv.tv_usec = 0; |
657 | ||
554e0a8d AT |
658 | errno = 0; |
659 | ||
a7026ba9 | 660 | count = select(maxfd + 1, &r_fds, &w_fds, NULL, &tv); |
a57873b7 | 661 | |
a57873b7 | 662 | if (count <= 0) { |
2a5df862 WD |
663 | if (errno == EBADF) { |
664 | defer_forwarding_messages = 0; | |
554e0a8d | 665 | exit_cleanup(RERR_SOCKETIO); |
2a5df862 | 666 | } |
ce827c3e WD |
667 | if (am_sender && tv.tv_sec == 0) |
668 | send_extra_file_list(sock_f_out, -1); | |
669 | else | |
670 | check_timeout(); | |
4c36ddbe AT |
671 | continue; |
672 | } | |
673 | ||
3309507d | 674 | if (io_filesfrom_f_out >= 0) { |
ba525f77 | 675 | if (ff_buf.len) { |
56014c8c WD |
676 | if (FD_ISSET(io_filesfrom_f_out, &w_fds)) { |
677 | int l = write(io_filesfrom_f_out, | |
ba525f77 WD |
678 | ff_buf.buf + ff_buf.pos, |
679 | ff_buf.len); | |
56014c8c | 680 | if (l > 0) { |
ba525f77 WD |
681 | if (!(ff_buf.len -= l)) |
682 | ff_buf.pos = 0; | |
56014c8c | 683 | else |
ba525f77 | 684 | ff_buf.pos += l; |
47cffb77 | 685 | } else if (errno != EINTR) { |
56014c8c WD |
686 | /* XXX should we complain? */ |
687 | io_filesfrom_f_out = -1; | |
688 | } | |
689 | } | |
3309507d | 690 | } else if (io_filesfrom_f_in >= 0) { |
56014c8c | 691 | if (FD_ISSET(io_filesfrom_f_in, &r_fds)) { |
22955408 | 692 | #ifdef ICONV_OPTION |
ba525f77 | 693 | xbuf *ibuf = filesfrom_convert ? &iconv_buf : &ff_buf; |
22955408 WD |
694 | #else |
695 | xbuf *ibuf = &ff_buf; | |
696 | #endif | |
ba525f77 | 697 | int l = read(io_filesfrom_f_in, ibuf->buf, ibuf->size); |
56014c8c | 698 | if (l <= 0) { |
47cffb77 WD |
699 | if (l == 0 || errno != EINTR) { |
700 | /* Send end-of-file marker */ | |
ba525f77 WD |
701 | memcpy(ff_buf.buf, "\0\0", 2); |
702 | ff_buf.len = ff_lastchar? 2 : 1; | |
703 | ff_buf.pos = 0; | |
47cffb77 WD |
704 | io_filesfrom_f_in = -1; |
705 | } | |
56014c8c | 706 | } else { |
22955408 | 707 | #ifdef ICONV_OPTION |
ba525f77 WD |
708 | if (filesfrom_convert) { |
709 | iconv_buf.pos = 0; | |
710 | iconv_buf.len = l; | |
711 | iconvbufs(ic_send, &iconv_buf, &ff_buf, | |
712 | ICB_EXPAND_OUT|ICB_INCLUDE_BAD|ICB_INCLUDE_INCOMPLETE); | |
713 | l = ff_buf.len; | |
714 | } | |
22955408 | 715 | #endif |
56014c8c | 716 | if (!eol_nulls) { |
ba525f77 | 717 | char *s = ff_buf.buf + l; |
56014c8c | 718 | /* Transform CR and/or LF into '\0' */ |
ba525f77 | 719 | while (s-- > ff_buf.buf) { |
56014c8c WD |
720 | if (*s == '\n' || *s == '\r') |
721 | *s = '\0'; | |
722 | } | |
723 | } | |
ba525f77 | 724 | if (!ff_lastchar) { |
56014c8c WD |
725 | /* Last buf ended with a '\0', so don't |
726 | * let this buf start with one. */ | |
ba525f77 WD |
727 | while (l && ff_buf.buf[ff_buf.pos] == '\0') |
728 | ff_buf.pos++, l--; | |
56014c8c WD |
729 | } |
730 | if (!l) | |
ba525f77 | 731 | ff_buf.pos = 0; |
56014c8c | 732 | else { |
ba525f77 | 733 | char *f = ff_buf.buf + ff_buf.pos; |
56014c8c WD |
734 | char *t = f; |
735 | char *eob = f + l; | |
736 | /* Eliminate any multi-'\0' runs. */ | |
737 | while (f != eob) { | |
738 | if (!(*t++ = *f++)) { | |
739 | while (f != eob && !*f) | |
740 | f++, l--; | |
741 | } | |
742 | } | |
ba525f77 | 743 | ff_lastchar = f[-1]; |
56014c8c | 744 | } |
ba525f77 | 745 | ff_buf.len = l; |
56014c8c WD |
746 | } |
747 | } | |
748 | } | |
749 | } | |
750 | ||
f89b9368 WD |
751 | if (!FD_ISSET(fd, &r_fds)) |
752 | continue; | |
554e0a8d | 753 | |
4c36ddbe AT |
754 | n = read(fd, buf, len); |
755 | ||
1ea087a7 WD |
756 | if (n <= 0) { |
757 | if (n == 0) | |
1f75bb10 | 758 | whine_about_eof(fd); /* Doesn't return. */ |
d62bcc17 WD |
759 | if (errno == EINTR || errno == EWOULDBLOCK |
760 | || errno == EAGAIN) | |
7a55d06e | 761 | continue; |
1f75bb10 WD |
762 | |
763 | /* Don't write errors on a dead socket. */ | |
72f2d1b3 | 764 | if (fd == sock_f_in) { |
8ef246e0 | 765 | io_end_multiplex_out(); |
3f0211b6 | 766 | rsyserr(FERROR_SOCKET, errno, "read error"); |
72f2d1b3 WD |
767 | } else |
768 | rsyserr(FERROR, errno, "read error"); | |
1f75bb10 | 769 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 | 770 | } |
00bdf899 WD |
771 | |
772 | buf += n; | |
773 | len -= n; | |
d8aeda1e | 774 | cnt += n; |
1f75bb10 | 775 | |
3b0a30eb WD |
776 | if (fd == sock_f_in && io_timeout) |
777 | last_io_in = time(NULL); | |
4c36ddbe | 778 | } |
8d9dc9f9 | 779 | |
d8aeda1e | 780 | return cnt; |
4c36ddbe | 781 | } |
8d9dc9f9 | 782 | |
67b8f3df | 783 | /* Read a line into the "buf" buffer. */ |
ba525f77 | 784 | int read_line(int fd, char *buf, size_t bufsiz, int flags) |
56014c8c | 785 | { |
ba525f77 | 786 | char ch, *s, *eob; |
56014c8c | 787 | int cnt; |
56014c8c | 788 | |
ba525f77 WD |
789 | #ifdef ICONV_OPTION |
790 | if (flags & RL_CONVERT && iconv_buf.size < bufsiz) | |
791 | realloc_xbuf(&iconv_buf, bufsiz + 1024); | |
792 | #endif | |
793 | ||
56014c8c | 794 | start: |
22955408 | 795 | #ifdef ICONV_OPTION |
ba525f77 | 796 | s = flags & RL_CONVERT ? iconv_buf.buf : buf; |
22955408 WD |
797 | #else |
798 | s = buf; | |
799 | #endif | |
ba525f77 | 800 | eob = s + bufsiz - 1; |
56014c8c WD |
801 | while (1) { |
802 | cnt = read(fd, &ch, 1); | |
803 | if (cnt < 0 && (errno == EWOULDBLOCK | |
804 | || errno == EINTR || errno == EAGAIN)) { | |
805 | struct timeval tv; | |
6c850772 WD |
806 | fd_set r_fds, e_fds; |
807 | FD_ZERO(&r_fds); | |
808 | FD_SET(fd, &r_fds); | |
809 | FD_ZERO(&e_fds); | |
810 | FD_SET(fd, &e_fds); | |
e626b29e | 811 | tv.tv_sec = select_timeout; |
56014c8c | 812 | tv.tv_usec = 0; |
6c850772 | 813 | if (!select(fd+1, &r_fds, NULL, &e_fds, &tv)) |
56014c8c | 814 | check_timeout(); |
35c8fd76 WD |
815 | /*if (FD_ISSET(fd, &e_fds)) |
816 | rprintf(FINFO, "select exception on fd %d\n", fd); */ | |
56014c8c WD |
817 | continue; |
818 | } | |
819 | if (cnt != 1) | |
820 | break; | |
ba525f77 | 821 | if (flags & RL_EOL_NULLS ? ch == '\0' : (ch == '\r' || ch == '\n')) { |
67b8f3df | 822 | /* Skip empty lines if dumping comments. */ |
ba525f77 | 823 | if (flags & RL_DUMP_COMMENTS && s == buf) |
56014c8c WD |
824 | continue; |
825 | break; | |
826 | } | |
827 | if (s < eob) | |
828 | *s++ = ch; | |
829 | } | |
830 | *s = '\0'; | |
7a55d06e | 831 | |
ba525f77 | 832 | if (flags & RL_DUMP_COMMENTS && (*buf == '#' || *buf == ';')) |
56014c8c WD |
833 | goto start; |
834 | ||
ba525f77 WD |
835 | #ifdef ICONV_OPTION |
836 | if (flags & RL_CONVERT) { | |
837 | xbuf outbuf; | |
838 | INIT_XBUF(outbuf, buf, 0, bufsiz); | |
839 | iconv_buf.pos = 0; | |
840 | iconv_buf.len = s - iconv_buf.buf; | |
841 | iconvbufs(ic_recv, &iconv_buf, &outbuf, | |
842 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE); | |
843 | outbuf.buf[outbuf.len] = '\0'; | |
844 | return outbuf.len; | |
845 | } | |
846 | #endif | |
847 | ||
67b8f3df WD |
848 | return s - buf; |
849 | } | |
850 | ||
53936ef9 WD |
851 | void read_args(int f_in, char *mod_name, char *buf, size_t bufsiz, int rl_nulls, |
852 | char ***argv_p, int *argc_p, char **request_p) | |
67b8f3df WD |
853 | { |
854 | int maxargs = MAX_ARGS; | |
855 | int dot_pos = 0; | |
856 | int argc = 0; | |
857 | char **argv, *p; | |
22955408 WD |
858 | int rl_flags = (rl_nulls ? RL_EOL_NULLS : 0); |
859 | ||
860 | #ifdef ICONV_OPTION | |
861 | rl_flags |= (protect_args && ic_recv != (iconv_t)-1 ? RL_CONVERT : 0); | |
862 | #endif | |
67b8f3df WD |
863 | |
864 | if (!(argv = new_array(char *, maxargs))) | |
865 | out_of_memory("read_args"); | |
53936ef9 | 866 | if (mod_name && !protect_args) |
67b8f3df WD |
867 | argv[argc++] = "rsyncd"; |
868 | ||
869 | while (1) { | |
ba525f77 | 870 | if (read_line(f_in, buf, bufsiz, rl_flags) == 0) |
67b8f3df WD |
871 | break; |
872 | ||
53936ef9 | 873 | if (argc == maxargs-1) { |
67b8f3df WD |
874 | maxargs += MAX_ARGS; |
875 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
876 | out_of_memory("read_args"); | |
877 | } | |
878 | ||
879 | if (dot_pos) { | |
880 | if (request_p) { | |
881 | *request_p = strdup(buf); | |
882 | request_p = NULL; | |
883 | } | |
884 | if (mod_name) | |
885 | glob_expand_module(mod_name, buf, &argv, &argc, &maxargs); | |
886 | else | |
887 | glob_expand(buf, &argv, &argc, &maxargs); | |
888 | } else { | |
889 | if (!(p = strdup(buf))) | |
890 | out_of_memory("read_args"); | |
891 | argv[argc++] = p; | |
892 | if (*p == '.' && p[1] == '\0') | |
893 | dot_pos = argc; | |
894 | } | |
895 | } | |
53936ef9 | 896 | argv[argc] = NULL; |
67b8f3df | 897 | |
987a5467 WD |
898 | glob_expand(NULL, NULL, NULL, NULL); |
899 | ||
67b8f3df WD |
900 | *argc_p = argc; |
901 | *argv_p = argv; | |
56014c8c | 902 | } |
7a55d06e | 903 | |
8ef246e0 | 904 | int io_start_buffering_out(int f_out) |
1f75bb10 | 905 | { |
8ef246e0 WD |
906 | if (iobuf_out) { |
907 | assert(f_out == iobuf_f_out); | |
908 | return 0; | |
909 | } | |
1f75bb10 WD |
910 | if (!(iobuf_out = new_array(char, IO_BUFFER_SIZE))) |
911 | out_of_memory("io_start_buffering_out"); | |
912 | iobuf_out_cnt = 0; | |
8ef246e0 WD |
913 | iobuf_f_out = f_out; |
914 | return 1; | |
1f75bb10 WD |
915 | } |
916 | ||
8ef246e0 | 917 | int io_start_buffering_in(int f_in) |
1f75bb10 | 918 | { |
8ef246e0 WD |
919 | if (iobuf_in) { |
920 | assert(f_in == iobuf_f_in); | |
921 | return 0; | |
922 | } | |
1f75bb10 WD |
923 | iobuf_in_siz = 2 * IO_BUFFER_SIZE; |
924 | if (!(iobuf_in = new_array(char, iobuf_in_siz))) | |
925 | out_of_memory("io_start_buffering_in"); | |
8ef246e0 WD |
926 | iobuf_f_in = f_in; |
927 | return 1; | |
1f75bb10 WD |
928 | } |
929 | ||
8ef246e0 | 930 | void io_end_buffering_in(void) |
1f75bb10 | 931 | { |
8ef246e0 WD |
932 | if (!iobuf_in) |
933 | return; | |
934 | free(iobuf_in); | |
935 | iobuf_in = NULL; | |
936 | iobuf_in_ndx = 0; | |
937 | iobuf_in_remaining = 0; | |
938 | iobuf_f_in = -1; | |
939 | } | |
940 | ||
941 | void io_end_buffering_out(void) | |
942 | { | |
943 | if (!iobuf_out) | |
944 | return; | |
945 | io_flush(FULL_FLUSH); | |
946 | free(iobuf_out); | |
947 | iobuf_out = NULL; | |
948 | iobuf_f_out = -1; | |
1f75bb10 WD |
949 | } |
950 | ||
be91bd81 | 951 | void maybe_flush_socket(int important) |
626bec8e | 952 | { |
be91bd81 WD |
953 | if (iobuf_out && iobuf_out_cnt |
954 | && (important || time(NULL) - last_io_out >= 5)) | |
626bec8e WD |
955 | io_flush(NORMAL_FLUSH); |
956 | } | |
957 | ||
cdf236aa | 958 | void maybe_send_keepalive(void) |
9e2409ab | 959 | { |
3b0a30eb | 960 | if (time(NULL) - last_io_out >= allowed_lull) { |
9e2409ab | 961 | if (!iobuf_out || !iobuf_out_cnt) { |
3221f451 WD |
962 | if (protocol_version < 29) |
963 | return; /* there's nothing we can do */ | |
8ef246e0 | 964 | if (protocol_version >= 30) |
332cf6df | 965 | send_msg(MSG_NOOP, "", 0, 0); |
8ef246e0 | 966 | else { |
9decb4d2 | 967 | write_int(sock_f_out, cur_flist->used); |
8ef246e0 WD |
968 | write_shortint(sock_f_out, ITEM_IS_NEW); |
969 | } | |
9e2409ab WD |
970 | } |
971 | if (iobuf_out) | |
972 | io_flush(NORMAL_FLUSH); | |
973 | } | |
974 | } | |
975 | ||
8ef246e0 WD |
976 | void start_flist_forward(int f_in) |
977 | { | |
978 | assert(iobuf_out != NULL); | |
979 | assert(iobuf_f_out == msg_fd_out); | |
980 | flist_forward_from = f_in; | |
981 | } | |
982 | ||
983 | void stop_flist_forward() | |
984 | { | |
8ef246e0 | 985 | flist_forward_from = -1; |
dde5b772 | 986 | io_flush(FULL_FLUSH); |
8ef246e0 WD |
987 | } |
988 | ||
880da007 MP |
989 | /** |
990 | * Continue trying to read len bytes - don't return until len has been | |
991 | * read. | |
992 | **/ | |
3151cbae | 993 | static void read_loop(int fd, char *buf, size_t len) |
4c36ddbe AT |
994 | { |
995 | while (len) { | |
996 | int n = read_timeout(fd, buf, len); | |
997 | ||
998 | buf += n; | |
999 | len -= n; | |
8d9dc9f9 AT |
1000 | } |
1001 | } | |
1002 | ||
7a55d06e MP |
1003 | /** |
1004 | * Read from the file descriptor handling multiplexing - return number | |
1005 | * of bytes read. | |
d62bcc17 WD |
1006 | * |
1007 | * Never returns <= 0. | |
7a55d06e | 1008 | */ |
c399d22a | 1009 | static int readfd_unbuffered(int fd, char *buf, size_t len) |
8d9dc9f9 | 1010 | { |
f2a4853c | 1011 | size_t msg_bytes; |
d8aeda1e | 1012 | int tag, cnt = 0; |
33544bf4 | 1013 | char line[BIGPATHBUFLEN]; |
8d9dc9f9 | 1014 | |
8ef246e0 | 1015 | if (!iobuf_in || fd != iobuf_f_in) |
4c36ddbe | 1016 | return read_timeout(fd, buf, len); |
8d9dc9f9 | 1017 | |
8ef246e0 WD |
1018 | if (!io_multiplexing_in && iobuf_in_remaining == 0) { |
1019 | iobuf_in_remaining = read_timeout(fd, iobuf_in, iobuf_in_siz); | |
1f75bb10 | 1020 | iobuf_in_ndx = 0; |
76c21947 WD |
1021 | } |
1022 | ||
d8aeda1e | 1023 | while (cnt == 0) { |
8ef246e0 WD |
1024 | if (iobuf_in_remaining) { |
1025 | len = MIN(len, iobuf_in_remaining); | |
1f75bb10 WD |
1026 | memcpy(buf, iobuf_in + iobuf_in_ndx, len); |
1027 | iobuf_in_ndx += len; | |
8ef246e0 | 1028 | iobuf_in_remaining -= len; |
d8aeda1e | 1029 | cnt = len; |
76c21947 | 1030 | break; |
8d9dc9f9 AT |
1031 | } |
1032 | ||
909ce14f | 1033 | read_loop(fd, line, 4); |
ff41a59f | 1034 | tag = IVAL(line, 0); |
679e7657 | 1035 | |
f2a4853c | 1036 | msg_bytes = tag & 0xFFFFFF; |
d17e1dd2 | 1037 | tag = (tag >> 24) - MPLEX_BASE; |
8d9dc9f9 | 1038 | |
d17e1dd2 WD |
1039 | switch (tag) { |
1040 | case MSG_DATA: | |
f2a4853c | 1041 | if (msg_bytes > iobuf_in_siz) { |
1f75bb10 | 1042 | if (!(iobuf_in = realloc_array(iobuf_in, char, |
f2a4853c | 1043 | msg_bytes))) |
c399d22a | 1044 | out_of_memory("readfd_unbuffered"); |
f2a4853c | 1045 | iobuf_in_siz = msg_bytes; |
76c21947 | 1046 | } |
f2a4853c | 1047 | read_loop(fd, iobuf_in, msg_bytes); |
8ef246e0 | 1048 | iobuf_in_remaining = msg_bytes; |
1f75bb10 | 1049 | iobuf_in_ndx = 0; |
d17e1dd2 | 1050 | break; |
8ef246e0 WD |
1051 | case MSG_NOOP: |
1052 | if (am_sender) | |
1053 | maybe_send_keepalive(); | |
1054 | break; | |
1055 | case MSG_IO_ERROR: | |
1056 | if (msg_bytes != 4) | |
1057 | goto invalid_msg; | |
1058 | read_loop(fd, line, msg_bytes); | |
e5f35681 | 1059 | send_msg_int(MSG_IO_ERROR, IVAL(line, 0)); |
8ef246e0 WD |
1060 | io_error |= IVAL(line, 0); |
1061 | break; | |
bc40a305 WD |
1062 | case MSG_DEL_STATS: |
1063 | if (msg_bytes) | |
1064 | goto invalid_msg; | |
1065 | read_del_stats(fd); | |
1066 | if (am_sender && am_server) | |
1067 | write_del_stats(sock_f_out); | |
1068 | break; | |
0d67e00a | 1069 | case MSG_DELETED: |
f2a4853c WD |
1070 | if (msg_bytes >= sizeof line) |
1071 | goto overflow; | |
332cf6df WD |
1072 | #ifdef ICONV_OPTION |
1073 | if (ic_recv != (iconv_t)-1) { | |
ba525f77 WD |
1074 | xbuf outbuf, inbuf; |
1075 | char ibuf[512]; | |
332cf6df | 1076 | int add_null = 0; |
ba525f77 WD |
1077 | |
1078 | INIT_CONST_XBUF(outbuf, line); | |
bb640d32 | 1079 | INIT_XBUF(inbuf, ibuf, 0, (size_t)-1); |
ba525f77 | 1080 | |
332cf6df | 1081 | while (msg_bytes) { |
ba525f77 WD |
1082 | inbuf.len = msg_bytes > sizeof ibuf |
1083 | ? sizeof ibuf : msg_bytes; | |
1084 | read_loop(fd, inbuf.buf, inbuf.len); | |
1085 | if (!(msg_bytes -= inbuf.len) | |
1086 | && !ibuf[inbuf.len-1]) | |
1087 | inbuf.len--, add_null = 1; | |
1088 | if (iconvbufs(ic_send, &inbuf, &outbuf, | |
1089 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE) < 0) | |
1090 | goto overflow; | |
ba525f77 WD |
1091 | } |
1092 | if (add_null) { | |
1093 | if (outbuf.len == outbuf.size) | |
1094 | goto overflow; | |
1095 | outbuf.buf[outbuf.len++] = '\0'; | |
332cf6df | 1096 | } |
ba525f77 | 1097 | msg_bytes = outbuf.len; |
332cf6df WD |
1098 | } else |
1099 | #endif | |
1100 | read_loop(fd, line, msg_bytes); | |
0d67e00a | 1101 | /* A directory name was sent with the trailing null */ |
f2a4853c | 1102 | if (msg_bytes > 0 && !line[msg_bytes-1]) |
0d67e00a | 1103 | log_delete(line, S_IFDIR); |
12bda6f7 WD |
1104 | else { |
1105 | line[msg_bytes] = '\0'; | |
0d67e00a | 1106 | log_delete(line, S_IFREG); |
12bda6f7 | 1107 | } |
0d67e00a | 1108 | break; |
9981c27e | 1109 | case MSG_SUCCESS: |
f2a4853c | 1110 | if (msg_bytes != 4) { |
8ef246e0 | 1111 | invalid_msg: |
cdf236aa | 1112 | rprintf(FERROR, "invalid multi-message %d:%ld [%s]\n", |
f2a4853c | 1113 | tag, (long)msg_bytes, who_am_i()); |
9981c27e WD |
1114 | exit_cleanup(RERR_STREAMIO); |
1115 | } | |
f2a4853c | 1116 | read_loop(fd, line, msg_bytes); |
9981c27e | 1117 | successful_send(IVAL(line, 0)); |
9981c27e | 1118 | break; |
8ef246e0 WD |
1119 | case MSG_NO_SEND: |
1120 | if (msg_bytes != 4) | |
1121 | goto invalid_msg; | |
1122 | read_loop(fd, line, msg_bytes); | |
1123 | send_msg_int(MSG_NO_SEND, IVAL(line, 0)); | |
1124 | break; | |
d17e1dd2 WD |
1125 | case MSG_INFO: |
1126 | case MSG_ERROR: | |
3f0211b6 WD |
1127 | case MSG_ERROR_XFER: |
1128 | case MSG_WARNING: | |
f2a4853c WD |
1129 | if (msg_bytes >= sizeof line) { |
1130 | overflow: | |
bd9fca47 | 1131 | rprintf(FERROR, |
cdf236aa | 1132 | "multiplexing overflow %d:%ld [%s]\n", |
f2a4853c | 1133 | tag, (long)msg_bytes, who_am_i()); |
d17e1dd2 WD |
1134 | exit_cleanup(RERR_STREAMIO); |
1135 | } | |
f2a4853c | 1136 | read_loop(fd, line, msg_bytes); |
332cf6df | 1137 | rwrite((enum logcode)tag, line, msg_bytes, 1); |
7f9bf6b7 WD |
1138 | if (first_message) { |
1139 | if (list_only && !am_sender && tag == 1) { | |
1140 | line[msg_bytes] = '\0'; | |
1141 | check_for_d_option_error(line); | |
1142 | } | |
1143 | first_message = 0; | |
1144 | } | |
d17e1dd2 WD |
1145 | break; |
1146 | default: | |
cdf236aa WD |
1147 | rprintf(FERROR, "unexpected tag %d [%s]\n", |
1148 | tag, who_am_i()); | |
65417579 | 1149 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 | 1150 | } |
8d9dc9f9 AT |
1151 | } |
1152 | ||
8ef246e0 | 1153 | if (iobuf_in_remaining == 0) |
d17e1dd2 | 1154 | io_flush(NORMAL_FLUSH); |
76c21947 | 1155 | |
d8aeda1e | 1156 | return cnt; |
8d9dc9f9 AT |
1157 | } |
1158 | ||
dde5b772 WD |
1159 | /* Do a buffered read from fd. Don't return until all N bytes have |
1160 | * been read. If all N can't be read then exit with an error. */ | |
3151cbae | 1161 | static void readfd(int fd, char *buffer, size_t N) |
720b47f2 | 1162 | { |
d8aeda1e | 1163 | int cnt; |
d62bcc17 | 1164 | size_t total = 0; |
3151cbae | 1165 | |
6ba9279f | 1166 | while (total < N) { |
d8aeda1e WD |
1167 | cnt = readfd_unbuffered(fd, buffer + total, N-total); |
1168 | total += cnt; | |
7f28dbee | 1169 | } |
1b7c47cb | 1170 | |
b9f592fb WD |
1171 | if (fd == write_batch_monitor_in) { |
1172 | if ((size_t)write(batch_fd, buffer, total) != total) | |
1173 | exit_cleanup(RERR_FILEIO); | |
1174 | } | |
1f75bb10 | 1175 | |
8ef246e0 WD |
1176 | if (fd == flist_forward_from) |
1177 | writefd(iobuf_f_out, buffer, total); | |
1178 | ||
1f75bb10 WD |
1179 | if (fd == sock_f_in) |
1180 | stats.total_read += total; | |
720b47f2 AT |
1181 | } |
1182 | ||
3a993aa4 | 1183 | unsigned short read_shortint(int f) |
9361f839 | 1184 | { |
482f48cc WD |
1185 | char b[2]; |
1186 | readfd(f, b, 2); | |
1187 | return (UVAL(b, 1) << 8) + UVAL(b, 0); | |
9361f839 WD |
1188 | } |
1189 | ||
b7922338 | 1190 | int32 read_int(int f) |
720b47f2 | 1191 | { |
4c36ddbe | 1192 | char b[4]; |
d8aeda1e | 1193 | int32 num; |
d730b113 | 1194 | |
482f48cc WD |
1195 | readfd(f, b, 4); |
1196 | num = IVAL(b, 0); | |
1197 | #if SIZEOF_INT32 > 4 | |
1198 | if (num & (int32)0x80000000) | |
1199 | num |= ~(int32)0xffffffff; | |
1200 | #endif | |
d8aeda1e | 1201 | return num; |
720b47f2 AT |
1202 | } |
1203 | ||
351e23ad | 1204 | int32 read_varint(int f) |
3a6a366f | 1205 | { |
351e23ad WD |
1206 | union { |
1207 | char b[5]; | |
1208 | int32 x; | |
1209 | } u; | |
1210 | uchar ch; | |
1211 | int extra; | |
1212 | ||
1213 | u.x = 0; | |
1214 | readfd(f, (char*)&ch, 1); | |
1215 | extra = int_byte_extra[ch / 4]; | |
1216 | if (extra) { | |
1217 | uchar bit = ((uchar)1<<(8-extra)); | |
1218 | if (extra >= (int)sizeof u.b) { | |
1219 | rprintf(FERROR, "Overflow in read_varint()\n"); | |
1220 | exit_cleanup(RERR_STREAMIO); | |
1221 | } | |
1222 | readfd(f, u.b, extra); | |
1223 | u.b[extra] = ch & (bit-1); | |
1224 | } else | |
1225 | u.b[0] = ch; | |
1226 | #if CAREFUL_ALIGNMENT | |
1227 | u.x = IVAL(u.b,0); | |
1228 | #endif | |
1229 | #if SIZEOF_INT32 > 4 | |
1230 | if (u.x & (int32)0x80000000) | |
1231 | u.x |= ~(int32)0xffffffff; | |
1232 | #endif | |
1233 | return u.x; | |
1234 | } | |
71c46176 | 1235 | |
351e23ad WD |
1236 | int64 read_varlong(int f, uchar min_bytes) |
1237 | { | |
1238 | union { | |
1239 | char b[9]; | |
1240 | int64 x; | |
1241 | } u; | |
1242 | char b2[8]; | |
1243 | int extra; | |
71c46176 | 1244 | |
031fa9ad | 1245 | #if SIZEOF_INT64 < 8 |
351e23ad | 1246 | memset(u.b, 0, 8); |
031fa9ad | 1247 | #else |
351e23ad | 1248 | u.x = 0; |
031fa9ad | 1249 | #endif |
351e23ad WD |
1250 | readfd(f, b2, min_bytes); |
1251 | memcpy(u.b, b2+1, min_bytes-1); | |
1252 | extra = int_byte_extra[CVAL(b2, 0) / 4]; | |
1253 | if (extra) { | |
1254 | uchar bit = ((uchar)1<<(8-extra)); | |
1255 | if (min_bytes + extra > (int)sizeof u.b) { | |
1256 | rprintf(FERROR, "Overflow in read_varlong()\n"); | |
1257 | exit_cleanup(RERR_STREAMIO); | |
1258 | } | |
1259 | readfd(f, u.b + min_bytes - 1, extra); | |
1260 | u.b[min_bytes + extra - 1] = CVAL(b2, 0) & (bit-1); | |
4ea4acf1 | 1261 | #if SIZEOF_INT64 < 8 |
351e23ad | 1262 | if (min_bytes + extra > 5 || u.b[4] || CVAL(u.b,3) & 0x80) { |
4ea4acf1 WD |
1263 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); |
1264 | exit_cleanup(RERR_UNSUPPORTED); | |
1265 | } | |
1266 | #endif | |
351e23ad WD |
1267 | } else |
1268 | u.b[min_bytes + extra - 1] = CVAL(b2, 0); | |
1269 | #if SIZEOF_INT64 < 8 | |
1270 | u.x = IVAL(u.b,0); | |
1271 | #elif CAREFUL_ALIGNMENT | |
1272 | u.x = IVAL(u.b,0) | (((int64)IVAL(u.b,4))<<32); | |
1273 | #endif | |
1274 | return u.x; | |
1275 | } | |
1276 | ||
1277 | int64 read_longint(int f) | |
1278 | { | |
4ea4acf1 | 1279 | #if SIZEOF_INT64 >= 8 |
351e23ad | 1280 | char b[9]; |
4ea4acf1 | 1281 | #endif |
351e23ad | 1282 | int32 num = read_int(f); |
71c46176 | 1283 | |
351e23ad WD |
1284 | if (num != (int32)0xffffffff) |
1285 | return num; | |
1286 | ||
1287 | #if SIZEOF_INT64 < 8 | |
1288 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); | |
1289 | exit_cleanup(RERR_UNSUPPORTED); | |
1290 | #else | |
1291 | readfd(f, b, 8); | |
1292 | return IVAL(b,0) | (((int64)IVAL(b,4))<<32); | |
1293 | #endif | |
3a6a366f AT |
1294 | } |
1295 | ||
4a19c3b2 | 1296 | void read_buf(int f, char *buf, size_t len) |
720b47f2 | 1297 | { |
4c36ddbe | 1298 | readfd(f,buf,len); |
720b47f2 AT |
1299 | } |
1300 | ||
4a19c3b2 | 1301 | void read_sbuf(int f, char *buf, size_t len) |
575f2fca | 1302 | { |
93095cbe | 1303 | readfd(f, buf, len); |
af436313 | 1304 | buf[len] = '\0'; |
575f2fca AT |
1305 | } |
1306 | ||
9361f839 | 1307 | uchar read_byte(int f) |
182dca5c | 1308 | { |
9361f839 | 1309 | uchar c; |
93095cbe | 1310 | readfd(f, (char *)&c, 1); |
4c36ddbe | 1311 | return c; |
182dca5c | 1312 | } |
720b47f2 | 1313 | |
46e99b09 WD |
1314 | int read_vstring(int f, char *buf, int bufsize) |
1315 | { | |
1316 | int len = read_byte(f); | |
1317 | ||
1318 | if (len & 0x80) | |
1319 | len = (len & ~0x80) * 0x100 + read_byte(f); | |
1320 | ||
1321 | if (len >= bufsize) { | |
1322 | rprintf(FERROR, "over-long vstring received (%d > %d)\n", | |
1323 | len, bufsize - 1); | |
9a6ed83f | 1324 | return -1; |
46e99b09 WD |
1325 | } |
1326 | ||
1327 | if (len) | |
1328 | readfd(f, buf, len); | |
1329 | buf[len] = '\0'; | |
1330 | return len; | |
1331 | } | |
1332 | ||
188fed95 WD |
1333 | /* Populate a sum_struct with values from the socket. This is |
1334 | * called by both the sender and the receiver. */ | |
1335 | void read_sum_head(int f, struct sum_struct *sum) | |
1336 | { | |
8bd77e70 | 1337 | int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE; |
188fed95 | 1338 | sum->count = read_int(f); |
c638caa6 WD |
1339 | if (sum->count < 0) { |
1340 | rprintf(FERROR, "Invalid checksum count %ld [%s]\n", | |
1341 | (long)sum->count, who_am_i()); | |
1342 | exit_cleanup(RERR_PROTOCOL); | |
1343 | } | |
188fed95 | 1344 | sum->blength = read_int(f); |
8bd77e70 | 1345 | if (sum->blength < 0 || sum->blength > max_blength) { |
cdf236aa WD |
1346 | rprintf(FERROR, "Invalid block length %ld [%s]\n", |
1347 | (long)sum->blength, who_am_i()); | |
188fed95 WD |
1348 | exit_cleanup(RERR_PROTOCOL); |
1349 | } | |
1350 | sum->s2length = protocol_version < 27 ? csum_length : (int)read_int(f); | |
a0456b9c | 1351 | if (sum->s2length < 0 || sum->s2length > MAX_DIGEST_LEN) { |
cdf236aa WD |
1352 | rprintf(FERROR, "Invalid checksum length %d [%s]\n", |
1353 | sum->s2length, who_am_i()); | |
188fed95 WD |
1354 | exit_cleanup(RERR_PROTOCOL); |
1355 | } | |
1356 | sum->remainder = read_int(f); | |
1357 | if (sum->remainder < 0 || sum->remainder > sum->blength) { | |
cdf236aa WD |
1358 | rprintf(FERROR, "Invalid remainder length %ld [%s]\n", |
1359 | (long)sum->remainder, who_am_i()); | |
188fed95 WD |
1360 | exit_cleanup(RERR_PROTOCOL); |
1361 | } | |
1362 | } | |
1363 | ||
c207d7ec WD |
1364 | /* Send the values from a sum_struct over the socket. Set sum to |
1365 | * NULL if there are no checksums to send. This is called by both | |
1366 | * the generator and the sender. */ | |
1367 | void write_sum_head(int f, struct sum_struct *sum) | |
1368 | { | |
1369 | static struct sum_struct null_sum; | |
1370 | ||
1371 | if (sum == NULL) | |
1372 | sum = &null_sum; | |
1373 | ||
1374 | write_int(f, sum->count); | |
1375 | write_int(f, sum->blength); | |
1376 | if (protocol_version >= 27) | |
1377 | write_int(f, sum->s2length); | |
1378 | write_int(f, sum->remainder); | |
1379 | } | |
1380 | ||
08571358 MP |
1381 | /** |
1382 | * Sleep after writing to limit I/O bandwidth usage. | |
1383 | * | |
1384 | * @todo Rather than sleeping after each write, it might be better to | |
1385 | * use some kind of averaging. The current algorithm seems to always | |
1386 | * use a bit less bandwidth than specified, because it doesn't make up | |
1387 | * for slow periods. But arguably this is a feature. In addition, we | |
1388 | * ought to take the time used to write the data into account. | |
71e58630 WD |
1389 | * |
1390 | * During some phases of big transfers (file FOO is uptodate) this is | |
1391 | * called with a small bytes_written every time. As the kernel has to | |
1392 | * round small waits up to guarantee that we actually wait at least the | |
1393 | * requested number of microseconds, this can become grossly inaccurate. | |
1394 | * We therefore keep track of the bytes we've written over time and only | |
1395 | * sleep when the accumulated delay is at least 1 tenth of a second. | |
08571358 MP |
1396 | **/ |
1397 | static void sleep_for_bwlimit(int bytes_written) | |
1398 | { | |
71e58630 | 1399 | static struct timeval prior_tv; |
0f78b815 | 1400 | static long total_written = 0; |
71e58630 WD |
1401 | struct timeval tv, start_tv; |
1402 | long elapsed_usec, sleep_usec; | |
1403 | ||
1404 | #define ONE_SEC 1000000L /* # of microseconds in a second */ | |
08571358 | 1405 | |
9a0cfff5 | 1406 | if (!bwlimit_writemax) |
08571358 | 1407 | return; |
e681e820 | 1408 | |
0f78b815 | 1409 | total_written += bytes_written; |
71e58630 WD |
1410 | |
1411 | gettimeofday(&start_tv, NULL); | |
1412 | if (prior_tv.tv_sec) { | |
1413 | elapsed_usec = (start_tv.tv_sec - prior_tv.tv_sec) * ONE_SEC | |
1414 | + (start_tv.tv_usec - prior_tv.tv_usec); | |
1415 | total_written -= elapsed_usec * bwlimit / (ONE_SEC/1024); | |
1416 | if (total_written < 0) | |
1417 | total_written = 0; | |
1418 | } | |
3151cbae | 1419 | |
71e58630 WD |
1420 | sleep_usec = total_written * (ONE_SEC/1024) / bwlimit; |
1421 | if (sleep_usec < ONE_SEC / 10) { | |
1422 | prior_tv = start_tv; | |
1423 | return; | |
1424 | } | |
08571358 | 1425 | |
71e58630 WD |
1426 | tv.tv_sec = sleep_usec / ONE_SEC; |
1427 | tv.tv_usec = sleep_usec % ONE_SEC; | |
98b332ed | 1428 | select(0, NULL, NULL, NULL, &tv); |
71e58630 WD |
1429 | |
1430 | gettimeofday(&prior_tv, NULL); | |
1431 | elapsed_usec = (prior_tv.tv_sec - start_tv.tv_sec) * ONE_SEC | |
1432 | + (prior_tv.tv_usec - start_tv.tv_usec); | |
1433 | total_written = (sleep_usec - elapsed_usec) * bwlimit / (ONE_SEC/1024); | |
08571358 MP |
1434 | } |
1435 | ||
f8605c5b MM |
1436 | static const char *what_fd_is(int fd) |
1437 | { | |
1438 | static char buf[20]; | |
1439 | ||
1440 | if (fd == sock_f_out) | |
1441 | return "socket"; | |
1442 | else if (fd == msg_fd_out) | |
1443 | return "message fd"; | |
1444 | else if (fd == batch_fd) | |
1445 | return "batch file"; | |
1446 | else { | |
1447 | snprintf(buf, sizeof buf, "fd %d", fd); | |
1448 | return buf; | |
1449 | } | |
1450 | } | |
1451 | ||
1f75bb10 | 1452 | /* Write len bytes to the file descriptor fd, looping as necessary to get |
0fb2fc4a | 1453 | * the job done and also (in certain circumstances) reading any data on |
af436313 | 1454 | * msg_fd_in to avoid deadlock. |
880da007 MP |
1455 | * |
1456 | * This function underlies the multiplexing system. The body of the | |
1f75bb10 | 1457 | * application never calls this function directly. */ |
4a19c3b2 | 1458 | static void writefd_unbuffered(int fd, const char *buf, size_t len) |
720b47f2 | 1459 | { |
1ea087a7 | 1460 | size_t n, total = 0; |
6c850772 | 1461 | fd_set w_fds, r_fds, e_fds; |
d8aeda1e | 1462 | int maxfd, count, cnt, using_r_fds; |
e4c877cf | 1463 | int defer_inc = 0; |
8d9dc9f9 | 1464 | struct timeval tv; |
720b47f2 | 1465 | |
3be97bf9 | 1466 | if (no_flush++) |
e4c877cf | 1467 | defer_forwarding_messages++, defer_inc++; |
e44f9a12 | 1468 | |
4c36ddbe | 1469 | while (total < len) { |
8d9dc9f9 | 1470 | FD_ZERO(&w_fds); |
6c850772 WD |
1471 | FD_SET(fd, &w_fds); |
1472 | FD_ZERO(&e_fds); | |
1473 | FD_SET(fd, &e_fds); | |
1ea087a7 | 1474 | maxfd = fd; |
4c36ddbe | 1475 | |
954bbed8 | 1476 | if (msg_fd_in >= 0) { |
56014c8c | 1477 | FD_ZERO(&r_fds); |
6c850772 | 1478 | FD_SET(msg_fd_in, &r_fds); |
1ea087a7 WD |
1479 | if (msg_fd_in > maxfd) |
1480 | maxfd = msg_fd_in; | |
3eeac9bc WD |
1481 | using_r_fds = 1; |
1482 | } else | |
1483 | using_r_fds = 0; | |
8d9dc9f9 | 1484 | |
e626b29e | 1485 | tv.tv_sec = select_timeout; |
8d9dc9f9 | 1486 | tv.tv_usec = 0; |
4c36ddbe | 1487 | |
554e0a8d | 1488 | errno = 0; |
3eeac9bc | 1489 | count = select(maxfd + 1, using_r_fds ? &r_fds : NULL, |
6c850772 | 1490 | &w_fds, &e_fds, &tv); |
4c36ddbe AT |
1491 | |
1492 | if (count <= 0) { | |
1ea087a7 | 1493 | if (count < 0 && errno == EBADF) |
554e0a8d | 1494 | exit_cleanup(RERR_SOCKETIO); |
bd717af8 | 1495 | check_timeout(); |
8d9dc9f9 AT |
1496 | continue; |
1497 | } | |
4c36ddbe | 1498 | |
35c8fd76 WD |
1499 | /*if (FD_ISSET(fd, &e_fds)) |
1500 | rprintf(FINFO, "select exception on fd %d\n", fd); */ | |
6c850772 | 1501 | |
3eeac9bc | 1502 | if (using_r_fds && FD_ISSET(msg_fd_in, &r_fds)) |
d17e1dd2 | 1503 | read_msg_fd(); |
554e0a8d | 1504 | |
9a6ed83f | 1505 | if (!FD_ISSET(fd, &w_fds)) |
1ea087a7 | 1506 | continue; |
4c36ddbe | 1507 | |
1ea087a7 | 1508 | n = len - total; |
9a0cfff5 | 1509 | if (bwlimit_writemax && n > bwlimit_writemax) |
1ea087a7 | 1510 | n = bwlimit_writemax; |
d8aeda1e | 1511 | cnt = write(fd, buf + total, n); |
1ea087a7 | 1512 | |
d8aeda1e WD |
1513 | if (cnt <= 0) { |
1514 | if (cnt < 0) { | |
3309507d WD |
1515 | if (errno == EINTR) |
1516 | continue; | |
1517 | if (errno == EWOULDBLOCK || errno == EAGAIN) { | |
1518 | msleep(1); | |
1519 | continue; | |
1520 | } | |
f0359dd0 AT |
1521 | } |
1522 | ||
1ea087a7 | 1523 | /* Don't try to write errors back across the stream. */ |
1f75bb10 | 1524 | if (fd == sock_f_out) |
8ef246e0 | 1525 | io_end_multiplex_out(); |
2a5df862 WD |
1526 | /* Don't try to write errors down a failing msg pipe. */ |
1527 | if (am_server && fd == msg_fd_out) | |
1528 | exit_cleanup(RERR_STREAMIO); | |
1ea087a7 | 1529 | rsyserr(FERROR, errno, |
f8605c5b MM |
1530 | "writefd_unbuffered failed to write %ld bytes to %s [%s]", |
1531 | (long)len, what_fd_is(fd), who_am_i()); | |
d1b31da7 WD |
1532 | /* If the other side is sending us error messages, try |
1533 | * to grab any messages they sent before they died. */ | |
f2179fd3 | 1534 | while (!am_server && fd == sock_f_out && io_multiplexing_in) { |
ba525f77 | 1535 | char buf[1024]; |
3b0a30eb | 1536 | set_io_timeout(30); |
9e2409ab | 1537 | ignore_timeout = 0; |
ba525f77 | 1538 | readfd_unbuffered(sock_f_in, buf, sizeof buf); |
d1b31da7 | 1539 | } |
1ea087a7 WD |
1540 | exit_cleanup(RERR_STREAMIO); |
1541 | } | |
4c36ddbe | 1542 | |
d8aeda1e | 1543 | total += cnt; |
e4c877cf | 1544 | defer_forwarding_messages++, defer_inc++; |
a800434a | 1545 | |
1f75bb10 | 1546 | if (fd == sock_f_out) { |
626bec8e | 1547 | if (io_timeout || am_generator) |
3b0a30eb | 1548 | last_io_out = time(NULL); |
d8aeda1e | 1549 | sleep_for_bwlimit(cnt); |
1f75bb10 | 1550 | } |
4c36ddbe | 1551 | } |
e44f9a12 AT |
1552 | |
1553 | no_flush--; | |
0b789446 WD |
1554 | if (keep_defer_forwarding) |
1555 | defer_inc--; | |
17a4977b | 1556 | if (!(defer_forwarding_messages -= defer_inc) && !no_flush) |
e4c877cf | 1557 | msg_flush(); |
d6dead6b AT |
1558 | } |
1559 | ||
0b789446 | 1560 | int io_flush(int flush_it_all) |
d6dead6b | 1561 | { |
0b789446 | 1562 | int flushed_something = 0; |
8d9dc9f9 | 1563 | |
0b789446 WD |
1564 | if (no_flush) |
1565 | return 0; | |
e4c877cf | 1566 | |
0b789446 WD |
1567 | if (iobuf_out_cnt) { |
1568 | if (io_multiplexing_out) | |
1569 | mplex_write(sock_f_out, MSG_DATA, iobuf_out, iobuf_out_cnt, 0); | |
1570 | else | |
1571 | writefd_unbuffered(iobuf_f_out, iobuf_out, iobuf_out_cnt); | |
1572 | iobuf_out_cnt = 0; | |
1573 | flushed_something = 1; | |
1574 | } | |
1575 | ||
1576 | if (flush_it_all && !defer_forwarding_messages && msg_queue.head) { | |
e4c877cf | 1577 | msg_flush(); |
0b789446 WD |
1578 | flushed_something = 1; |
1579 | } | |
1580 | ||
1581 | return flushed_something; | |
8d9dc9f9 AT |
1582 | } |
1583 | ||
4a19c3b2 | 1584 | static void writefd(int fd, const char *buf, size_t len) |
d6dead6b | 1585 | { |
1f75bb10 WD |
1586 | if (fd == sock_f_out) |
1587 | stats.total_written += len; | |
1588 | ||
f8605c5b MM |
1589 | if (fd == write_batch_monitor_out) |
1590 | writefd_unbuffered(batch_fd, buf, len); | |
b9f592fb | 1591 | |
8ef246e0 | 1592 | if (!iobuf_out || fd != iobuf_f_out) { |
4c36ddbe AT |
1593 | writefd_unbuffered(fd, buf, len); |
1594 | return; | |
1595 | } | |
d6dead6b AT |
1596 | |
1597 | while (len) { | |
1f75bb10 | 1598 | int n = MIN((int)len, IO_BUFFER_SIZE - iobuf_out_cnt); |
d6dead6b | 1599 | if (n > 0) { |
1f75bb10 | 1600 | memcpy(iobuf_out+iobuf_out_cnt, buf, n); |
d6dead6b AT |
1601 | buf += n; |
1602 | len -= n; | |
1f75bb10 | 1603 | iobuf_out_cnt += n; |
d6dead6b | 1604 | } |
3151cbae | 1605 | |
1f75bb10 | 1606 | if (iobuf_out_cnt == IO_BUFFER_SIZE) |
d17e1dd2 | 1607 | io_flush(NORMAL_FLUSH); |
d6dead6b | 1608 | } |
d6dead6b | 1609 | } |
720b47f2 | 1610 | |
3a993aa4 | 1611 | void write_shortint(int f, unsigned short x) |
9361f839 | 1612 | { |
3a993aa4 WD |
1613 | char b[2]; |
1614 | b[0] = (char)x; | |
1615 | b[1] = (char)(x >> 8); | |
1616 | writefd(f, b, 2); | |
9361f839 WD |
1617 | } |
1618 | ||
351e23ad WD |
1619 | void write_int(int f, int32 x) |
1620 | { | |
1621 | char b[4]; | |
1622 | SIVAL(b, 0, x); | |
1623 | writefd(f, b, 4); | |
1624 | } | |
1625 | ||
f31514ad | 1626 | void write_varint(int f, int32 x) |
1c3344a1 WD |
1627 | { |
1628 | char b[5]; | |
351e23ad WD |
1629 | uchar bit; |
1630 | int cnt = 4; | |
1631 | ||
1632 | SIVAL(b, 1, x); | |
1633 | ||
1634 | while (cnt > 1 && b[cnt] == 0) | |
1635 | cnt--; | |
1636 | bit = ((uchar)1<<(7-cnt+1)); | |
1637 | if (CVAL(b, cnt) >= bit) { | |
1638 | cnt++; | |
1639 | *b = ~(bit-1); | |
1640 | } else if (cnt > 1) | |
1641 | *b = b[cnt] | ~(bit*2-1); | |
1642 | else | |
1643 | *b = b[cnt]; | |
1644 | ||
1645 | writefd(f, b, cnt); | |
1c3344a1 WD |
1646 | } |
1647 | ||
351e23ad | 1648 | void write_varlong(int f, int64 x, uchar min_bytes) |
720b47f2 | 1649 | { |
351e23ad WD |
1650 | char b[9]; |
1651 | uchar bit; | |
1652 | int cnt = 8; | |
1653 | ||
1654 | SIVAL(b, 1, x); | |
1655 | #if SIZEOF_INT64 >= 8 | |
1656 | SIVAL(b, 5, x >> 32); | |
1657 | #else | |
1658 | if (x <= 0x7FFFFFFF && x >= 0) | |
1659 | memset(b + 5, 0, 4); | |
1660 | else { | |
1661 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); | |
1662 | exit_cleanup(RERR_UNSUPPORTED); | |
1663 | } | |
1664 | #endif | |
1665 | ||
1666 | while (cnt > min_bytes && b[cnt] == 0) | |
1667 | cnt--; | |
1668 | bit = ((uchar)1<<(7-cnt+min_bytes)); | |
1669 | if (CVAL(b, cnt) >= bit) { | |
1670 | cnt++; | |
1671 | *b = ~(bit-1); | |
1672 | } else if (cnt > min_bytes) | |
1673 | *b = b[cnt] | ~(bit*2-1); | |
1674 | else | |
1675 | *b = b[cnt]; | |
1676 | ||
1677 | writefd(f, b, cnt); | |
720b47f2 AT |
1678 | } |
1679 | ||
7a24c346 MP |
1680 | /* |
1681 | * Note: int64 may actually be a 32-bit type if ./configure couldn't find any | |
1682 | * 64-bit types on this platform. | |
1683 | */ | |
71c46176 | 1684 | void write_longint(int f, int64 x) |
3a6a366f | 1685 | { |
351e23ad | 1686 | char b[12], * const s = b+4; |
3a6a366f | 1687 | |
351e23ad WD |
1688 | SIVAL(s, 0, x); |
1689 | if (x <= 0x7FFFFFFF && x >= 0) { | |
482f48cc | 1690 | writefd(f, s, 4); |
351e23ad WD |
1691 | return; |
1692 | } | |
3a6a366f | 1693 | |
4ea4acf1 | 1694 | #if SIZEOF_INT64 < 8 |
351e23ad WD |
1695 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); |
1696 | exit_cleanup(RERR_UNSUPPORTED); | |
4ea4acf1 | 1697 | #else |
351e23ad WD |
1698 | memset(b, 0xFF, 4); |
1699 | SIVAL(s, 4, x >> 32); | |
1700 | writefd(f, b, 12); | |
4ea4acf1 | 1701 | #endif |
3a6a366f AT |
1702 | } |
1703 | ||
4a19c3b2 | 1704 | void write_buf(int f, const char *buf, size_t len) |
720b47f2 | 1705 | { |
4c36ddbe | 1706 | writefd(f,buf,len); |
720b47f2 AT |
1707 | } |
1708 | ||
880da007 | 1709 | /** Write a string to the connection */ |
4a19c3b2 | 1710 | void write_sbuf(int f, const char *buf) |
f0fca04e | 1711 | { |
93095cbe | 1712 | writefd(f, buf, strlen(buf)); |
f0fca04e AT |
1713 | } |
1714 | ||
9361f839 | 1715 | void write_byte(int f, uchar c) |
182dca5c | 1716 | { |
93095cbe | 1717 | writefd(f, (char *)&c, 1); |
182dca5c AT |
1718 | } |
1719 | ||
4a19c3b2 | 1720 | void write_vstring(int f, const char *str, int len) |
46e99b09 WD |
1721 | { |
1722 | uchar lenbuf[3], *lb = lenbuf; | |
1723 | ||
1724 | if (len > 0x7F) { | |
1725 | if (len > 0x7FFF) { | |
1726 | rprintf(FERROR, | |
1727 | "attempting to send over-long vstring (%d > %d)\n", | |
1728 | len, 0x7FFF); | |
1729 | exit_cleanup(RERR_PROTOCOL); | |
1730 | } | |
1731 | *lb++ = len / 0x100 + 0x80; | |
1732 | } | |
1733 | *lb = len; | |
1734 | ||
1735 | writefd(f, (char*)lenbuf, lb - lenbuf + 1); | |
1736 | if (len) | |
1737 | writefd(f, str, len); | |
1738 | } | |
1739 | ||
8a65e0ce WD |
1740 | /* Send a file-list index using a byte-reduction method. */ |
1741 | void write_ndx(int f, int32 ndx) | |
1742 | { | |
1743 | static int32 prev_positive = -1, prev_negative = 1; | |
1744 | int32 diff, cnt = 0; | |
1745 | char b[6]; | |
1746 | ||
1747 | if (protocol_version < 30 || read_batch) { | |
1748 | write_int(f, ndx); | |
1749 | return; | |
1750 | } | |
1751 | ||
1752 | /* Send NDX_DONE as a single-byte 0 with no side effects. Send | |
1753 | * negative nums as a positive after sending a leading 0xFF. */ | |
1754 | if (ndx >= 0) { | |
1755 | diff = ndx - prev_positive; | |
1756 | prev_positive = ndx; | |
1757 | } else if (ndx == NDX_DONE) { | |
1758 | *b = 0; | |
1759 | writefd(f, b, 1); | |
1760 | return; | |
1761 | } else { | |
1762 | b[cnt++] = (char)0xFF; | |
1763 | ndx = -ndx; | |
1764 | diff = ndx - prev_negative; | |
1765 | prev_negative = ndx; | |
1766 | } | |
1767 | ||
1768 | /* A diff of 1 - 253 is sent as a one-byte diff; a diff of 254 - 32767 | |
1769 | * or 0 is sent as a 0xFE + a two-byte diff; otherwise we send 0xFE | |
1770 | * & all 4 bytes of the (non-negative) num with the high-bit set. */ | |
1771 | if (diff < 0xFE && diff > 0) | |
1772 | b[cnt++] = (char)diff; | |
1773 | else if (diff < 0 || diff > 0x7FFF) { | |
1774 | b[cnt++] = (char)0xFE; | |
1775 | b[cnt++] = (char)((ndx >> 24) | 0x80); | |
8a65e0ce | 1776 | b[cnt++] = (char)ndx; |
351e23ad WD |
1777 | b[cnt++] = (char)(ndx >> 8); |
1778 | b[cnt++] = (char)(ndx >> 16); | |
8a65e0ce WD |
1779 | } else { |
1780 | b[cnt++] = (char)0xFE; | |
1781 | b[cnt++] = (char)(diff >> 8); | |
1782 | b[cnt++] = (char)diff; | |
1783 | } | |
1784 | writefd(f, b, cnt); | |
1785 | } | |
1786 | ||
1787 | /* Receive a file-list index using a byte-reduction method. */ | |
1788 | int32 read_ndx(int f) | |
1789 | { | |
1790 | static int32 prev_positive = -1, prev_negative = 1; | |
1791 | int32 *prev_ptr, num; | |
1792 | char b[4]; | |
1793 | ||
1794 | if (protocol_version < 30) | |
1795 | return read_int(f); | |
1796 | ||
1797 | readfd(f, b, 1); | |
1798 | if (CVAL(b, 0) == 0xFF) { | |
1799 | readfd(f, b, 1); | |
1800 | prev_ptr = &prev_negative; | |
1801 | } else if (CVAL(b, 0) == 0) | |
1802 | return NDX_DONE; | |
1803 | else | |
1804 | prev_ptr = &prev_positive; | |
1805 | if (CVAL(b, 0) == 0xFE) { | |
1806 | readfd(f, b, 2); | |
1807 | if (CVAL(b, 0) & 0x80) { | |
351e23ad WD |
1808 | b[3] = CVAL(b, 0) & ~0x80; |
1809 | b[0] = b[1]; | |
1810 | readfd(f, b+1, 2); | |
1811 | num = IVAL(b, 0); | |
8a65e0ce | 1812 | } else |
351e23ad | 1813 | num = (UVAL(b,0)<<8) + UVAL(b,1) + *prev_ptr; |
8a65e0ce | 1814 | } else |
351e23ad | 1815 | num = UVAL(b, 0) + *prev_ptr; |
8a65e0ce WD |
1816 | *prev_ptr = num; |
1817 | if (prev_ptr == &prev_negative) | |
1818 | num = -num; | |
1819 | return num; | |
1820 | } | |
1821 | ||
67b8f3df WD |
1822 | /* Read a line of up to bufsiz-1 characters into buf. Strips |
1823 | * the (required) trailing newline and all carriage returns. | |
1824 | * Returns 1 for success; 0 for I/O error or truncation. */ | |
1825 | int read_line_old(int f, char *buf, size_t bufsiz) | |
f0fca04e | 1826 | { |
67b8f3df WD |
1827 | bufsiz--; /* leave room for the null */ |
1828 | while (bufsiz > 0) { | |
528bfcd7 | 1829 | buf[0] = 0; |
f0fca04e | 1830 | read_buf(f, buf, 1); |
914cc65c MP |
1831 | if (buf[0] == 0) |
1832 | return 0; | |
6ed6d7f5 | 1833 | if (buf[0] == '\n') |
f0fca04e | 1834 | break; |
f0fca04e AT |
1835 | if (buf[0] != '\r') { |
1836 | buf++; | |
67b8f3df | 1837 | bufsiz--; |
f0fca04e AT |
1838 | } |
1839 | } | |
6ed6d7f5 | 1840 | *buf = '\0'; |
67b8f3df | 1841 | return bufsiz > 0; |
f0fca04e AT |
1842 | } |
1843 | ||
f0fca04e AT |
1844 | void io_printf(int fd, const char *format, ...) |
1845 | { | |
d62bcc17 | 1846 | va_list ap; |
33544bf4 | 1847 | char buf[BIGPATHBUFLEN]; |
f0fca04e | 1848 | int len; |
3151cbae | 1849 | |
f0fca04e | 1850 | va_start(ap, format); |
3151cbae | 1851 | len = vsnprintf(buf, sizeof buf, format, ap); |
f0fca04e AT |
1852 | va_end(ap); |
1853 | ||
f89b9368 WD |
1854 | if (len < 0) |
1855 | exit_cleanup(RERR_STREAMIO); | |
f0fca04e | 1856 | |
33544bf4 WD |
1857 | if (len > (int)sizeof buf) { |
1858 | rprintf(FERROR, "io_printf() was too long for the buffer.\n"); | |
1859 | exit_cleanup(RERR_STREAMIO); | |
1860 | } | |
1861 | ||
f0fca04e AT |
1862 | write_sbuf(fd, buf); |
1863 | } | |
8d9dc9f9 | 1864 | |
d17e1dd2 | 1865 | /** Setup for multiplexing a MSG_* stream with the data stream. */ |
1f75bb10 | 1866 | void io_start_multiplex_out(void) |
8d9dc9f9 | 1867 | { |
d17e1dd2 | 1868 | io_flush(NORMAL_FLUSH); |
8ef246e0 | 1869 | io_start_buffering_out(sock_f_out); |
8d9dc9f9 AT |
1870 | io_multiplexing_out = 1; |
1871 | } | |
1872 | ||
d17e1dd2 | 1873 | /** Setup for multiplexing a MSG_* stream with the data stream. */ |
1f75bb10 | 1874 | void io_start_multiplex_in(void) |
8d9dc9f9 | 1875 | { |
d17e1dd2 | 1876 | io_flush(NORMAL_FLUSH); |
8ef246e0 | 1877 | io_start_buffering_in(sock_f_in); |
8d9dc9f9 AT |
1878 | io_multiplexing_in = 1; |
1879 | } | |
1880 | ||
d17e1dd2 | 1881 | /** Write an message to the multiplexed data stream. */ |
332cf6df | 1882 | int io_multiplex_write(enum msgcode code, const char *buf, size_t len, int convert) |
8d9dc9f9 | 1883 | { |
f89b9368 WD |
1884 | if (!io_multiplexing_out) |
1885 | return 0; | |
d17e1dd2 | 1886 | io_flush(NORMAL_FLUSH); |
1b7c47cb | 1887 | stats.total_written += (len+4); |
332cf6df | 1888 | mplex_write(sock_f_out, code, buf, len, convert); |
8d9dc9f9 AT |
1889 | return 1; |
1890 | } | |
1891 | ||
8ef246e0 | 1892 | void io_end_multiplex_in(void) |
7f459268 WD |
1893 | { |
1894 | io_multiplexing_in = 0; | |
8ef246e0 | 1895 | io_end_buffering_in(); |
7f459268 WD |
1896 | } |
1897 | ||
d17e1dd2 | 1898 | /** Stop output multiplexing. */ |
8ef246e0 | 1899 | void io_end_multiplex_out(void) |
554e0a8d AT |
1900 | { |
1901 | io_multiplexing_out = 0; | |
8ef246e0 | 1902 | io_end_buffering_out(); |
554e0a8d AT |
1903 | } |
1904 | ||
b9f592fb WD |
1905 | void start_write_batch(int fd) |
1906 | { | |
1907 | /* Some communication has already taken place, but we don't | |
1908 | * enable batch writing until here so that we can write a | |
1909 | * canonical record of the communication even though the | |
1910 | * actual communication so far depends on whether a daemon | |
1911 | * is involved. */ | |
1912 | write_int(batch_fd, protocol_version); | |
71456d30 WD |
1913 | if (protocol_version >= 30) |
1914 | write_byte(batch_fd, inc_recurse); | |
b9f592fb | 1915 | write_int(batch_fd, checksum_seed); |
b9f592fb WD |
1916 | |
1917 | if (am_sender) | |
1918 | write_batch_monitor_out = fd; | |
1919 | else | |
1920 | write_batch_monitor_in = fd; | |
1921 | } | |
1922 | ||
1923 | void stop_write_batch(void) | |
1924 | { | |
1925 | write_batch_monitor_out = -1; | |
1926 | write_batch_monitor_in = -1; | |
1927 | } |