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> | |
d3d07a5e | 7 | * Copyright (C) 2003-2008 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" |
720b47f2 | 32 | |
880da007 | 33 | /** If no timeout is specified then use a 60 second select timeout */ |
8cd9fd4e AT |
34 | #define SELECT_TIMEOUT 60 |
35 | ||
7a55d06e | 36 | extern int bwlimit; |
71e58630 | 37 | extern size_t bwlimit_writemax; |
6ba9279f | 38 | extern int io_timeout; |
cdf236aa | 39 | extern int allowed_lull; |
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; |
7f9bf6b7 | 48 | extern int list_only; |
3b0a30eb | 49 | extern int read_batch; |
188fed95 | 50 | extern int csum_length; |
ba525f77 | 51 | extern int protect_args; |
b9f592fb WD |
52 | extern int checksum_seed; |
53 | extern int protocol_version; | |
47c11975 | 54 | extern int remove_source_files; |
cdf236aa | 55 | extern int preserve_hard_links; |
a800434a | 56 | extern struct stats stats; |
19531e1f | 57 | extern struct file_list *cur_flist; |
332cf6df | 58 | #ifdef ICONV_OPTION |
ba525f77 | 59 | extern int filesfrom_convert; |
332cf6df WD |
60 | extern iconv_t ic_send, ic_recv; |
61 | #endif | |
720b47f2 | 62 | |
a86179f4 | 63 | const char phase_unknown[] = "unknown"; |
9e2409ab | 64 | int ignore_timeout = 0; |
b9f592fb | 65 | int batch_fd = -1; |
04c722d5 | 66 | int msgdone_cnt = 0; |
805edf9d | 67 | |
cb2e1f18 | 68 | /* Ignore an EOF error if non-zero. See whine_about_eof(). */ |
574c2500 | 69 | int kluge_around_eof = 0; |
7a55d06e | 70 | |
d17e1dd2 WD |
71 | int msg_fd_in = -1; |
72 | int msg_fd_out = -1; | |
cdf236aa WD |
73 | int sock_f_in = -1; |
74 | int sock_f_out = -1; | |
7a55d06e | 75 | |
8ef246e0 WD |
76 | static int iobuf_f_in = -1; |
77 | static char *iobuf_in; | |
78 | static size_t iobuf_in_siz; | |
79 | static size_t iobuf_in_ndx; | |
80 | static size_t iobuf_in_remaining; | |
81 | ||
82 | static int iobuf_f_out = -1; | |
83 | static char *iobuf_out; | |
84 | static int iobuf_out_cnt; | |
85 | ||
86 | int flist_forward_from = -1; | |
87 | ||
1f75bb10 WD |
88 | static int io_multiplexing_out; |
89 | static int io_multiplexing_in; | |
3b0a30eb WD |
90 | static time_t last_io_in; |
91 | static time_t last_io_out; | |
1f75bb10 WD |
92 | static int no_flush; |
93 | ||
b9f592fb WD |
94 | static int write_batch_monitor_in = -1; |
95 | static int write_batch_monitor_out = -1; | |
96 | ||
56014c8c WD |
97 | static int io_filesfrom_f_in = -1; |
98 | static int io_filesfrom_f_out = -1; | |
ba525f77 WD |
99 | static xbuf ff_buf = EMPTY_XBUF; |
100 | static char ff_lastchar; | |
332cf6df | 101 | #ifdef ICONV_OPTION |
ba525f77 | 102 | static xbuf iconv_buf = EMPTY_XBUF; |
332cf6df | 103 | #endif |
17a4977b | 104 | static int defer_forwarding_messages = 0, defer_forwarding_keep = 0; |
3b0a30eb | 105 | static int select_timeout = SELECT_TIMEOUT; |
d6081c82 WD |
106 | static int active_filecnt = 0; |
107 | static OFF_T active_bytecnt = 0; | |
7f9bf6b7 | 108 | static int first_message = 1; |
720b47f2 | 109 | |
351e23ad WD |
110 | static char int_byte_extra[64] = { |
111 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (00 - 3F)/4 */ | |
112 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (40 - 7F)/4 */ | |
113 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* (80 - BF)/4 */ | |
114 | 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 5, 6, /* (C0 - FF)/4 */ | |
482f48cc WD |
115 | }; |
116 | ||
7f9bf6b7 WD |
117 | #define REMOTE_OPTION_ERROR "rsync: on remote machine: -" |
118 | #define REMOTE_OPTION_ERROR2 ": unknown option" | |
119 | ||
29349024 WD |
120 | enum festatus { FES_SUCCESS, FES_REDO, FES_NO_SEND }; |
121 | ||
dde5b772 | 122 | static void readfd(int fd, char *buffer, size_t N); |
8ef246e0 WD |
123 | static void writefd(int fd, const char *buf, size_t len); |
124 | static void writefd_unbuffered(int fd, const char *buf, size_t len); | |
332cf6df | 125 | static void mplex_write(int fd, enum msgcode code, const char *buf, size_t len, int convert); |
ff41a59f | 126 | |
c6816b94 WD |
127 | struct flist_ndx_item { |
128 | struct flist_ndx_item *next; | |
129 | int ndx; | |
d17e1dd2 WD |
130 | }; |
131 | ||
c6816b94 WD |
132 | struct flist_ndx_list { |
133 | struct flist_ndx_item *head, *tail; | |
134 | }; | |
135 | ||
cdf236aa | 136 | static struct flist_ndx_list redo_list, hlink_list; |
d17e1dd2 | 137 | |
08c88178 WD |
138 | struct msg_list_item { |
139 | struct msg_list_item *next; | |
332cf6df | 140 | char convert; |
954bbed8 | 141 | char buf[1]; |
d17e1dd2 WD |
142 | }; |
143 | ||
08c88178 WD |
144 | struct msg_list { |
145 | struct msg_list_item *head, *tail; | |
146 | }; | |
147 | ||
e4c877cf | 148 | static struct msg_list msg_queue; |
d17e1dd2 | 149 | |
c6816b94 | 150 | static void flist_ndx_push(struct flist_ndx_list *lp, int ndx) |
d17e1dd2 | 151 | { |
c6816b94 WD |
152 | struct flist_ndx_item *item; |
153 | ||
154 | if (!(item = new(struct flist_ndx_item))) | |
155 | out_of_memory("flist_ndx_push"); | |
156 | item->next = NULL; | |
157 | item->ndx = ndx; | |
158 | if (lp->tail) | |
159 | lp->tail->next = item; | |
d17e1dd2 | 160 | else |
c6816b94 WD |
161 | lp->head = item; |
162 | lp->tail = item; | |
163 | } | |
164 | ||
165 | static int flist_ndx_pop(struct flist_ndx_list *lp) | |
166 | { | |
167 | struct flist_ndx_item *next; | |
168 | int ndx; | |
169 | ||
170 | if (!lp->head) | |
171 | return -1; | |
172 | ||
173 | ndx = lp->head->ndx; | |
174 | next = lp->head->next; | |
175 | free(lp->head); | |
176 | lp->head = next; | |
177 | if (!next) | |
178 | lp->tail = NULL; | |
179 | ||
180 | return ndx; | |
d17e1dd2 WD |
181 | } |
182 | ||
29349024 WD |
183 | static void got_flist_entry_status(enum festatus status, const char *buf) |
184 | { | |
185 | int ndx = IVAL(buf, 0); | |
186 | struct file_list *flist = flist_for_ndx(ndx); | |
187 | ||
188 | assert(flist != NULL); | |
29349024 WD |
189 | |
190 | if (remove_source_files) { | |
191 | active_filecnt--; | |
192 | active_bytecnt -= F_LENGTH(flist->files[ndx - flist->ndx_start]); | |
193 | } | |
194 | ||
195 | if (inc_recurse) | |
196 | flist->in_progress--; | |
197 | ||
198 | switch (status) { | |
199 | case FES_SUCCESS: | |
200 | if (remove_source_files) | |
201 | send_msg(MSG_SUCCESS, buf, 4, 0); | |
202 | if (preserve_hard_links) { | |
203 | struct file_struct *file = flist->files[ndx - flist->ndx_start]; | |
37ce1679 | 204 | if (F_IS_HLINKED(file)) { |
29349024 | 205 | flist_ndx_push(&hlink_list, ndx); |
37ce1679 WD |
206 | flist->in_progress++; |
207 | } | |
29349024 WD |
208 | } |
209 | break; | |
210 | case FES_REDO: | |
211 | if (inc_recurse) | |
212 | flist->to_redo++; | |
213 | flist_ndx_push(&redo_list, ndx); | |
214 | break; | |
215 | case FES_NO_SEND: | |
216 | break; | |
217 | } | |
218 | } | |
219 | ||
8d9dc9f9 AT |
220 | static void check_timeout(void) |
221 | { | |
222 | time_t t; | |
90ba34e2 | 223 | |
9e2409ab | 224 | if (!io_timeout || ignore_timeout) |
d17e1dd2 | 225 | return; |
8d9dc9f9 | 226 | |
3b0a30eb WD |
227 | if (!last_io_in) { |
228 | last_io_in = time(NULL); | |
8d9dc9f9 AT |
229 | return; |
230 | } | |
231 | ||
232 | t = time(NULL); | |
233 | ||
3b0a30eb | 234 | if (t - last_io_in >= io_timeout) { |
0adb99b9 | 235 | if (!am_server && !am_daemon) { |
4ccfd96c | 236 | rprintf(FERROR, "io timeout after %d seconds -- exiting\n", |
3b0a30eb | 237 | (int)(t-last_io_in)); |
0adb99b9 | 238 | } |
65417579 | 239 | exit_cleanup(RERR_TIMEOUT); |
8d9dc9f9 AT |
240 | } |
241 | } | |
242 | ||
1f75bb10 WD |
243 | /* Note the fds used for the main socket (which might really be a pipe |
244 | * for a local transfer, but we can ignore that). */ | |
245 | void io_set_sock_fds(int f_in, int f_out) | |
246 | { | |
247 | sock_f_in = f_in; | |
248 | sock_f_out = f_out; | |
249 | } | |
250 | ||
3b0a30eb WD |
251 | void set_io_timeout(int secs) |
252 | { | |
253 | io_timeout = secs; | |
254 | ||
255 | if (!io_timeout || io_timeout > SELECT_TIMEOUT) | |
256 | select_timeout = SELECT_TIMEOUT; | |
257 | else | |
258 | select_timeout = io_timeout; | |
259 | ||
260 | allowed_lull = read_batch ? 0 : (io_timeout + 1) / 2; | |
261 | } | |
262 | ||
98f8c9a5 WD |
263 | /* Setup the fd used to receive MSG_* messages. Only needed during the |
264 | * early stages of being a local sender (up through the sending of the | |
265 | * file list) or when we're the generator (to fetch the messages from | |
266 | * the receiver). */ | |
d17e1dd2 WD |
267 | void set_msg_fd_in(int fd) |
268 | { | |
269 | msg_fd_in = fd; | |
270 | } | |
271 | ||
98f8c9a5 WD |
272 | /* Setup the fd used to send our MSG_* messages. Only needed when |
273 | * we're the receiver (to send our messages to the generator). */ | |
d17e1dd2 WD |
274 | void set_msg_fd_out(int fd) |
275 | { | |
276 | msg_fd_out = fd; | |
277 | set_nonblocking(msg_fd_out); | |
278 | } | |
279 | ||
280 | /* Add a message to the pending MSG_* list. */ | |
332cf6df | 281 | static void msg_list_add(struct msg_list *lst, int code, const char *buf, int len, int convert) |
554e0a8d | 282 | { |
954bbed8 WD |
283 | struct msg_list_item *m; |
284 | int sz = len + 4 + sizeof m[0] - 1; | |
d17e1dd2 | 285 | |
954bbed8 | 286 | if (!(m = (struct msg_list_item *)new_array(char, sz))) |
c6816b94 | 287 | out_of_memory("msg_list_add"); |
954bbed8 | 288 | m->next = NULL; |
332cf6df | 289 | m->convert = convert; |
954bbed8 WD |
290 | SIVAL(m->buf, 0, ((code+MPLEX_BASE)<<24) | len); |
291 | memcpy(m->buf + 4, buf, len); | |
292 | if (lst->tail) | |
293 | lst->tail->next = m; | |
d17e1dd2 | 294 | else |
954bbed8 WD |
295 | lst->head = m; |
296 | lst->tail = m; | |
554e0a8d AT |
297 | } |
298 | ||
e4c877cf | 299 | static void msg_flush(void) |
3be97bf9 | 300 | { |
e4c877cf WD |
301 | if (am_generator) { |
302 | while (msg_queue.head && io_multiplexing_out) { | |
303 | struct msg_list_item *m = msg_queue.head; | |
332cf6df WD |
304 | int len = IVAL(m->buf, 0) & 0xFFFFFF; |
305 | int tag = *((uchar*)m->buf+3) - MPLEX_BASE; | |
e4c877cf WD |
306 | if (!(msg_queue.head = m->next)) |
307 | msg_queue.tail = NULL; | |
332cf6df | 308 | stats.total_written += len + 4; |
e4c877cf | 309 | defer_forwarding_messages++; |
332cf6df | 310 | mplex_write(sock_f_out, tag, m->buf + 4, len, m->convert); |
e4c877cf WD |
311 | defer_forwarding_messages--; |
312 | free(m); | |
313 | } | |
314 | } else { | |
315 | while (msg_queue.head) { | |
316 | struct msg_list_item *m = msg_queue.head; | |
332cf6df WD |
317 | int len = IVAL(m->buf, 0) & 0xFFFFFF; |
318 | int tag = *((uchar*)m->buf+3) - MPLEX_BASE; | |
e4c877cf WD |
319 | if (!(msg_queue.head = m->next)) |
320 | msg_queue.tail = NULL; | |
321 | defer_forwarding_messages++; | |
332cf6df | 322 | mplex_write(msg_fd_out, tag, m->buf + 4, len, m->convert); |
e4c877cf WD |
323 | defer_forwarding_messages--; |
324 | free(m); | |
325 | } | |
3be97bf9 WD |
326 | } |
327 | } | |
328 | ||
7f9bf6b7 WD |
329 | static void check_for_d_option_error(const char *msg) |
330 | { | |
331 | static char rsync263_opts[] = "BCDHIKLPRSTWabceghlnopqrtuvxz"; | |
332 | char *colon; | |
333 | int saw_d = 0; | |
334 | ||
335 | if (*msg != 'r' | |
336 | || strncmp(msg, REMOTE_OPTION_ERROR, sizeof REMOTE_OPTION_ERROR - 1) != 0) | |
337 | return; | |
338 | ||
339 | msg += sizeof REMOTE_OPTION_ERROR - 1; | |
340 | if (*msg == '-' || (colon = strchr(msg, ':')) == NULL | |
341 | || strncmp(colon, REMOTE_OPTION_ERROR2, sizeof REMOTE_OPTION_ERROR2 - 1) != 0) | |
342 | return; | |
343 | ||
344 | for ( ; *msg != ':'; msg++) { | |
345 | if (*msg == 'd') | |
346 | saw_d = 1; | |
347 | else if (*msg == 'e') | |
348 | break; | |
349 | else if (strchr(rsync263_opts, *msg) == NULL) | |
350 | return; | |
351 | } | |
352 | ||
353 | if (saw_d) { | |
354 | rprintf(FWARNING, | |
73cb6738 | 355 | "*** Try using \"--old-d\" if remote rsync is <= 2.6.3 ***\n"); |
7f9bf6b7 WD |
356 | } |
357 | } | |
358 | ||
98f8c9a5 WD |
359 | /* Read a message from the MSG_* fd and handle it. This is called either |
360 | * during the early stages of being a local sender (up through the sending | |
361 | * of the file list) or when we're the generator (to fetch the messages | |
362 | * from the receiver). */ | |
d17e1dd2 | 363 | static void read_msg_fd(void) |
554e0a8d | 364 | { |
f9c6b3e7 | 365 | char buf[2048]; |
06ce139f | 366 | size_t n; |
8ef246e0 | 367 | struct file_list *flist; |
d17e1dd2 | 368 | int fd = msg_fd_in; |
ff41a59f AT |
369 | int tag, len; |
370 | ||
00bdf899 | 371 | /* Temporarily disable msg_fd_in. This is needed to avoid looping back |
af436313 | 372 | * to this routine from writefd_unbuffered(). */ |
3be97bf9 | 373 | no_flush++; |
d17e1dd2 | 374 | msg_fd_in = -1; |
be21e29c | 375 | defer_forwarding_messages++; |
554e0a8d | 376 | |
dde5b772 | 377 | readfd(fd, buf, 4); |
ff41a59f AT |
378 | tag = IVAL(buf, 0); |
379 | ||
380 | len = tag & 0xFFFFFF; | |
d17e1dd2 | 381 | tag = (tag >> 24) - MPLEX_BASE; |
ff41a59f | 382 | |
d17e1dd2 WD |
383 | switch (tag) { |
384 | case MSG_DONE: | |
cc7b86bf | 385 | if (len < 0 || len > 1 || !am_generator) { |
8ef246e0 WD |
386 | invalid_msg: |
387 | rprintf(FERROR, "invalid message %d:%d [%s%s]\n", | |
388 | tag, len, who_am_i(), | |
3ea6e0e7 | 389 | inc_recurse ? "/inc" : ""); |
d17e1dd2 | 390 | exit_cleanup(RERR_STREAMIO); |
13c7bcbb | 391 | } |
cc7b86bf WD |
392 | if (len) { |
393 | readfd(fd, buf, len); | |
351e23ad | 394 | stats.total_read = read_varlong(fd, 3); |
cc7b86bf | 395 | } |
04c722d5 | 396 | msgdone_cnt++; |
d17e1dd2 WD |
397 | break; |
398 | case MSG_REDO: | |
8ef246e0 WD |
399 | if (len != 4 || !am_generator) |
400 | goto invalid_msg; | |
dde5b772 | 401 | readfd(fd, buf, 4); |
29349024 | 402 | got_flist_entry_status(FES_REDO, buf); |
8ef246e0 WD |
403 | break; |
404 | case MSG_FLIST: | |
3ea6e0e7 | 405 | if (len != 4 || !am_generator || !inc_recurse) |
8ef246e0 | 406 | goto invalid_msg; |
dde5b772 | 407 | readfd(fd, buf, 4); |
8ef246e0 WD |
408 | /* Read extra file list from receiver. */ |
409 | assert(iobuf_in != NULL); | |
410 | assert(iobuf_f_in == fd); | |
951e826b | 411 | if (DEBUG_GTE(FLIST, 2)) { |
1faa1a6d WD |
412 | rprintf(FINFO, "[%s] receiving flist for dir %d\n", |
413 | who_am_i(), IVAL(buf,0)); | |
414 | } | |
8ef246e0 WD |
415 | flist = recv_file_list(fd); |
416 | flist->parent_ndx = IVAL(buf,0); | |
da131912 WD |
417 | #ifdef SUPPORT_HARD_LINKS |
418 | if (preserve_hard_links) | |
419 | match_hard_links(flist); | |
420 | #endif | |
8ef246e0 WD |
421 | break; |
422 | case MSG_FLIST_EOF: | |
3ea6e0e7 | 423 | if (len != 0 || !am_generator || !inc_recurse) |
8ef246e0 WD |
424 | goto invalid_msg; |
425 | flist_eof = 1; | |
d17e1dd2 | 426 | break; |
e5f35681 WD |
427 | case MSG_IO_ERROR: |
428 | if (len != 4) | |
429 | goto invalid_msg; | |
430 | readfd(fd, buf, len); | |
431 | io_error |= IVAL(buf, 0); | |
432 | break; | |
0d67e00a | 433 | case MSG_DELETED: |
8ef246e0 WD |
434 | if (len >= (int)sizeof buf || !am_generator) |
435 | goto invalid_msg; | |
dde5b772 | 436 | readfd(fd, buf, len); |
332cf6df | 437 | send_msg(MSG_DELETED, buf, len, 1); |
0d67e00a | 438 | break; |
9981c27e | 439 | case MSG_SUCCESS: |
8ef246e0 WD |
440 | if (len != 4 || !am_generator) |
441 | goto invalid_msg; | |
29349024 WD |
442 | readfd(fd, buf, 4); |
443 | got_flist_entry_status(FES_SUCCESS, buf); | |
8ef246e0 WD |
444 | break; |
445 | case MSG_NO_SEND: | |
446 | if (len != 4 || !am_generator) | |
447 | goto invalid_msg; | |
29349024 WD |
448 | readfd(fd, buf, 4); |
449 | got_flist_entry_status(FES_NO_SEND, buf); | |
9981c27e | 450 | break; |
3f0211b6 | 451 | case MSG_ERROR_SOCKET: |
64119c79 | 452 | case MSG_CLIENT: |
8ef246e0 WD |
453 | if (!am_generator) |
454 | goto invalid_msg; | |
3f0211b6 | 455 | if (tag == MSG_ERROR_SOCKET) |
8ef246e0 | 456 | io_end_multiplex_out(); |
72f2d1b3 | 457 | /* FALL THROUGH */ |
d17e1dd2 WD |
458 | case MSG_INFO: |
459 | case MSG_ERROR: | |
3f0211b6 WD |
460 | case MSG_ERROR_XFER: |
461 | case MSG_WARNING: | |
d17e1dd2 WD |
462 | case MSG_LOG: |
463 | while (len) { | |
464 | n = len; | |
465 | if (n >= sizeof buf) | |
466 | n = sizeof buf - 1; | |
dde5b772 | 467 | readfd(fd, buf, n); |
332cf6df | 468 | rwrite((enum logcode)tag, buf, n, !am_generator); |
d17e1dd2 WD |
469 | len -= n; |
470 | } | |
471 | break; | |
472 | default: | |
f8b9da1a WD |
473 | rprintf(FERROR, "unknown message %d:%d [%s]\n", |
474 | tag, len, who_am_i()); | |
d17e1dd2 WD |
475 | exit_cleanup(RERR_STREAMIO); |
476 | } | |
477 | ||
3be97bf9 | 478 | no_flush--; |
d17e1dd2 | 479 | msg_fd_in = fd; |
17a4977b | 480 | if (!--defer_forwarding_messages && !no_flush) |
e4c877cf | 481 | msg_flush(); |
d17e1dd2 WD |
482 | } |
483 | ||
d6081c82 | 484 | /* This is used by the generator to limit how many file transfers can |
47c11975 | 485 | * be active at once when --remove-source-files is specified. Without |
d6081c82 WD |
486 | * this, sender-side deletions were mostly happening at the end. */ |
487 | void increment_active_files(int ndx, int itemizing, enum logcode code) | |
488 | { | |
489 | /* TODO: tune these limits? */ | |
5b986297 | 490 | while (active_filecnt >= (active_bytecnt >= 128*1024 ? 10 : 50)) { |
04c722d5 WD |
491 | check_for_finished_files(itemizing, code, 0); |
492 | if (iobuf_out_cnt) | |
493 | io_flush(NORMAL_FLUSH); | |
494 | else | |
495 | read_msg_fd(); | |
d6081c82 WD |
496 | } |
497 | ||
498 | active_filecnt++; | |
121bfb2b | 499 | active_bytecnt += F_LENGTH(cur_flist->files[ndx - cur_flist->ndx_start]); |
d6081c82 WD |
500 | } |
501 | ||
3be97bf9 | 502 | /* Write an message to a multiplexed stream. If this fails, rsync exits. */ |
332cf6df | 503 | static void mplex_write(int fd, enum msgcode code, const char *buf, size_t len, int convert) |
d17e1dd2 | 504 | { |
332cf6df | 505 | char buffer[BIGPATHBUFLEN]; /* Oversized for use by iconv code. */ |
3be97bf9 | 506 | size_t n = len; |
d17e1dd2 | 507 | |
332cf6df | 508 | #ifdef ICONV_OPTION |
ee6e80c7 WD |
509 | /* We need to convert buf before doing anything else so that we |
510 | * can include the (converted) byte length in the message header. */ | |
511 | if (convert && ic_send != (iconv_t)-1) { | |
512 | xbuf outbuf, inbuf; | |
513 | ||
514 | INIT_XBUF(outbuf, buffer + 4, 0, sizeof buffer - 4); | |
515 | INIT_XBUF(inbuf, (char*)buf, len, -1); | |
332cf6df | 516 | |
ee6e80c7 WD |
517 | iconvbufs(ic_send, &inbuf, &outbuf, |
518 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE); | |
519 | if (inbuf.len > 0) { | |
520 | rprintf(FERROR, "overflowed conversion buffer in mplex_write"); | |
521 | exit_cleanup(RERR_UNSUPPORTED); | |
522 | } | |
523 | ||
524 | n = len = outbuf.len; | |
525 | } else | |
526 | #endif | |
527 | if (n > 1024 - 4) /* BIGPATHBUFLEN can handle 1024 bytes */ | |
528 | n = 0; /* We'd rather do 2 writes than too much memcpy(). */ | |
3be97bf9 WD |
529 | else |
530 | memcpy(buffer + 4, buf, n); | |
531 | ||
ee6e80c7 WD |
532 | SIVAL(buffer, 0, ((MPLEX_BASE + (int)code)<<24) + len); |
533 | ||
17a4977b | 534 | defer_forwarding_keep = 1; /* defer_forwarding_messages++ on return */ |
3be97bf9 | 535 | writefd_unbuffered(fd, buffer, n+4); |
17a4977b | 536 | defer_forwarding_keep = 0; |
3be97bf9 | 537 | |
ee6e80c7 WD |
538 | if (len > n) |
539 | writefd_unbuffered(fd, buf+n, len-n); | |
17a4977b WD |
540 | |
541 | if (!--defer_forwarding_messages && !no_flush) | |
542 | msg_flush(); | |
d17e1dd2 WD |
543 | } |
544 | ||
332cf6df | 545 | int send_msg(enum msgcode code, const char *buf, int len, int convert) |
37f35d89 WD |
546 | { |
547 | if (msg_fd_out < 0) { | |
12ccc73a | 548 | if (!defer_forwarding_messages) |
332cf6df | 549 | return io_multiplex_write(code, buf, len, convert); |
12ccc73a WD |
550 | if (!io_multiplexing_out) |
551 | return 0; | |
332cf6df | 552 | msg_list_add(&msg_queue, code, buf, len, convert); |
12ccc73a | 553 | return 1; |
37f35d89 | 554 | } |
e4c877cf | 555 | if (flist_forward_from >= 0) |
332cf6df | 556 | msg_list_add(&msg_queue, code, buf, len, convert); |
e4c877cf | 557 | else |
332cf6df | 558 | mplex_write(msg_fd_out, code, buf, len, convert); |
12ccc73a | 559 | return 1; |
37f35d89 WD |
560 | } |
561 | ||
155d9206 WD |
562 | void send_msg_int(enum msgcode code, int num) |
563 | { | |
564 | char numbuf[4]; | |
565 | SIVAL(numbuf, 0, num); | |
332cf6df | 566 | send_msg(code, numbuf, 4, 0); |
155d9206 WD |
567 | } |
568 | ||
8ef246e0 | 569 | void wait_for_receiver(void) |
d17e1dd2 | 570 | { |
2a5df862 WD |
571 | if (iobuf_out_cnt) |
572 | io_flush(NORMAL_FLUSH); | |
573 | else | |
574 | read_msg_fd(); | |
8ef246e0 | 575 | } |
554e0a8d | 576 | |
8ef246e0 WD |
577 | int get_redo_num(void) |
578 | { | |
c6816b94 | 579 | return flist_ndx_pop(&redo_list); |
554e0a8d AT |
580 | } |
581 | ||
cdf236aa WD |
582 | int get_hlink_num(void) |
583 | { | |
584 | return flist_ndx_pop(&hlink_list); | |
585 | } | |
586 | ||
56014c8c WD |
587 | /** |
588 | * When we're the receiver and we have a local --files-from list of names | |
589 | * that needs to be sent over the socket to the sender, we have to do two | |
590 | * things at the same time: send the sender a list of what files we're | |
591 | * processing and read the incoming file+info list from the sender. We do | |
592 | * this by augmenting the read_timeout() function to copy this data. It | |
ba525f77 WD |
593 | * uses ff_buf to read a block of data from f_in (when it is ready, since |
594 | * it might be a pipe) and then blast it out f_out (when it is ready to | |
595 | * receive more data). | |
56014c8c WD |
596 | */ |
597 | void io_set_filesfrom_fds(int f_in, int f_out) | |
598 | { | |
599 | io_filesfrom_f_in = f_in; | |
600 | io_filesfrom_f_out = f_out; | |
ba525f77 WD |
601 | alloc_xbuf(&ff_buf, 2048); |
602 | #ifdef ICONV_OPTION | |
603 | if (protect_args) | |
604 | alloc_xbuf(&iconv_buf, 1024); | |
605 | #endif | |
56014c8c | 606 | } |
720b47f2 | 607 | |
cb2e1f18 WD |
608 | /* It's almost always an error to get an EOF when we're trying to read from the |
609 | * network, because the protocol is (for the most part) self-terminating. | |
880da007 | 610 | * |
cb2e1f18 WD |
611 | * There is one case for the receiver when it is at the end of the transfer |
612 | * (hanging around reading any keep-alive packets that might come its way): if | |
613 | * the sender dies before the generator's kill-signal comes through, we can end | |
614 | * up here needing to loop until the kill-signal arrives. In this situation, | |
615 | * kluge_around_eof will be < 0. | |
616 | * | |
617 | * There is another case for older protocol versions (< 24) where the module | |
618 | * listing was not terminated, so we must ignore an EOF error in that case and | |
619 | * exit. In this situation, kluge_around_eof will be > 0. */ | |
1f75bb10 | 620 | static void whine_about_eof(int fd) |
7a55d06e | 621 | { |
574c2500 | 622 | if (kluge_around_eof && fd == sock_f_in) { |
55bb7fff | 623 | int i; |
574c2500 WD |
624 | if (kluge_around_eof > 0) |
625 | exit_cleanup(0); | |
55bb7fff WD |
626 | /* If we're still here after 10 seconds, exit with an error. */ |
627 | for (i = 10*1000/20; i--; ) | |
574c2500 WD |
628 | msleep(20); |
629 | } | |
3151cbae | 630 | |
00bdf899 | 631 | rprintf(FERROR, RSYNC_NAME ": connection unexpectedly closed " |
6d56efa6 WD |
632 | "(%s bytes received so far) [%s]\n", |
633 | big_num(stats.total_read, 0), who_am_i()); | |
00bdf899 WD |
634 | |
635 | exit_cleanup(RERR_STREAMIO); | |
7a55d06e | 636 | } |
720b47f2 | 637 | |
880da007 | 638 | /** |
6ed6d7f5 | 639 | * Read from a socket with I/O timeout. return the number of bytes |
c3563c46 MP |
640 | * read. If no bytes can be read then exit, never return a number <= 0. |
641 | * | |
8886f8d0 MP |
642 | * TODO: If the remote shell connection fails, then current versions |
643 | * actually report an "unexpected EOF" error here. Since it's a | |
644 | * fairly common mistake to try to use rsh when ssh is required, we | |
645 | * should trap that: if we fail to read any data at all, we should | |
646 | * give a better explanation. We can tell whether the connection has | |
647 | * started by looking e.g. at whether the remote version is known yet. | |
c3563c46 | 648 | */ |
3151cbae | 649 | static int read_timeout(int fd, char *buf, size_t len) |
8d9dc9f9 | 650 | { |
d8aeda1e | 651 | int n, cnt = 0; |
4c36ddbe | 652 | |
dde5b772 | 653 | io_flush(FULL_FLUSH); |
ea2111d1 | 654 | |
d8aeda1e | 655 | while (cnt == 0) { |
7a55d06e | 656 | /* until we manage to read *something* */ |
56014c8c | 657 | fd_set r_fds, w_fds; |
4c36ddbe | 658 | struct timeval tv; |
1ea087a7 | 659 | int maxfd = fd; |
a57873b7 | 660 | int count; |
4c36ddbe | 661 | |
56014c8c | 662 | FD_ZERO(&r_fds); |
a7026ba9 | 663 | FD_ZERO(&w_fds); |
56014c8c | 664 | FD_SET(fd, &r_fds); |
3309507d | 665 | if (io_filesfrom_f_out >= 0) { |
56014c8c | 666 | int new_fd; |
ba525f77 | 667 | if (ff_buf.len == 0) { |
3309507d | 668 | if (io_filesfrom_f_in >= 0) { |
56014c8c WD |
669 | FD_SET(io_filesfrom_f_in, &r_fds); |
670 | new_fd = io_filesfrom_f_in; | |
671 | } else { | |
672 | io_filesfrom_f_out = -1; | |
673 | new_fd = -1; | |
674 | } | |
675 | } else { | |
56014c8c WD |
676 | FD_SET(io_filesfrom_f_out, &w_fds); |
677 | new_fd = io_filesfrom_f_out; | |
678 | } | |
1ea087a7 WD |
679 | if (new_fd > maxfd) |
680 | maxfd = new_fd; | |
554e0a8d AT |
681 | } |
682 | ||
e626b29e | 683 | tv.tv_sec = select_timeout; |
4c36ddbe AT |
684 | tv.tv_usec = 0; |
685 | ||
554e0a8d AT |
686 | errno = 0; |
687 | ||
a7026ba9 | 688 | count = select(maxfd + 1, &r_fds, &w_fds, NULL, &tv); |
a57873b7 | 689 | |
a57873b7 | 690 | if (count <= 0) { |
2a5df862 WD |
691 | if (errno == EBADF) { |
692 | defer_forwarding_messages = 0; | |
554e0a8d | 693 | exit_cleanup(RERR_SOCKETIO); |
2a5df862 | 694 | } |
bd717af8 | 695 | check_timeout(); |
4c36ddbe AT |
696 | continue; |
697 | } | |
698 | ||
3309507d | 699 | if (io_filesfrom_f_out >= 0) { |
ba525f77 | 700 | if (ff_buf.len) { |
56014c8c WD |
701 | if (FD_ISSET(io_filesfrom_f_out, &w_fds)) { |
702 | int l = write(io_filesfrom_f_out, | |
ba525f77 WD |
703 | ff_buf.buf + ff_buf.pos, |
704 | ff_buf.len); | |
56014c8c | 705 | if (l > 0) { |
ba525f77 WD |
706 | if (!(ff_buf.len -= l)) |
707 | ff_buf.pos = 0; | |
56014c8c | 708 | else |
ba525f77 | 709 | ff_buf.pos += l; |
47cffb77 | 710 | } else if (errno != EINTR) { |
56014c8c WD |
711 | /* XXX should we complain? */ |
712 | io_filesfrom_f_out = -1; | |
713 | } | |
714 | } | |
3309507d | 715 | } else if (io_filesfrom_f_in >= 0) { |
56014c8c | 716 | if (FD_ISSET(io_filesfrom_f_in, &r_fds)) { |
22955408 | 717 | #ifdef ICONV_OPTION |
ba525f77 | 718 | xbuf *ibuf = filesfrom_convert ? &iconv_buf : &ff_buf; |
22955408 WD |
719 | #else |
720 | xbuf *ibuf = &ff_buf; | |
721 | #endif | |
ba525f77 | 722 | int l = read(io_filesfrom_f_in, ibuf->buf, ibuf->size); |
56014c8c | 723 | if (l <= 0) { |
47cffb77 WD |
724 | if (l == 0 || errno != EINTR) { |
725 | /* Send end-of-file marker */ | |
ba525f77 WD |
726 | memcpy(ff_buf.buf, "\0\0", 2); |
727 | ff_buf.len = ff_lastchar? 2 : 1; | |
728 | ff_buf.pos = 0; | |
47cffb77 WD |
729 | io_filesfrom_f_in = -1; |
730 | } | |
56014c8c | 731 | } else { |
22955408 | 732 | #ifdef ICONV_OPTION |
ba525f77 WD |
733 | if (filesfrom_convert) { |
734 | iconv_buf.pos = 0; | |
735 | iconv_buf.len = l; | |
736 | iconvbufs(ic_send, &iconv_buf, &ff_buf, | |
737 | ICB_EXPAND_OUT|ICB_INCLUDE_BAD|ICB_INCLUDE_INCOMPLETE); | |
738 | l = ff_buf.len; | |
739 | } | |
22955408 | 740 | #endif |
56014c8c | 741 | if (!eol_nulls) { |
ba525f77 | 742 | char *s = ff_buf.buf + l; |
56014c8c | 743 | /* Transform CR and/or LF into '\0' */ |
ba525f77 | 744 | while (s-- > ff_buf.buf) { |
56014c8c WD |
745 | if (*s == '\n' || *s == '\r') |
746 | *s = '\0'; | |
747 | } | |
748 | } | |
ba525f77 | 749 | if (!ff_lastchar) { |
56014c8c WD |
750 | /* Last buf ended with a '\0', so don't |
751 | * let this buf start with one. */ | |
ba525f77 WD |
752 | while (l && ff_buf.buf[ff_buf.pos] == '\0') |
753 | ff_buf.pos++, l--; | |
56014c8c WD |
754 | } |
755 | if (!l) | |
ba525f77 | 756 | ff_buf.pos = 0; |
56014c8c | 757 | else { |
ba525f77 | 758 | char *f = ff_buf.buf + ff_buf.pos; |
56014c8c WD |
759 | char *t = f; |
760 | char *eob = f + l; | |
761 | /* Eliminate any multi-'\0' runs. */ | |
762 | while (f != eob) { | |
763 | if (!(*t++ = *f++)) { | |
764 | while (f != eob && !*f) | |
765 | f++, l--; | |
766 | } | |
767 | } | |
ba525f77 | 768 | ff_lastchar = f[-1]; |
56014c8c | 769 | } |
ba525f77 | 770 | ff_buf.len = l; |
56014c8c WD |
771 | } |
772 | } | |
773 | } | |
774 | } | |
775 | ||
f89b9368 WD |
776 | if (!FD_ISSET(fd, &r_fds)) |
777 | continue; | |
554e0a8d | 778 | |
4c36ddbe AT |
779 | n = read(fd, buf, len); |
780 | ||
1ea087a7 WD |
781 | if (n <= 0) { |
782 | if (n == 0) | |
1f75bb10 | 783 | whine_about_eof(fd); /* Doesn't return. */ |
d62bcc17 WD |
784 | if (errno == EINTR || errno == EWOULDBLOCK |
785 | || errno == EAGAIN) | |
7a55d06e | 786 | continue; |
1f75bb10 WD |
787 | |
788 | /* Don't write errors on a dead socket. */ | |
72f2d1b3 | 789 | if (fd == sock_f_in) { |
8ef246e0 | 790 | io_end_multiplex_out(); |
3f0211b6 | 791 | rsyserr(FERROR_SOCKET, errno, "read error"); |
72f2d1b3 WD |
792 | } else |
793 | rsyserr(FERROR, errno, "read error"); | |
1f75bb10 | 794 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 | 795 | } |
00bdf899 WD |
796 | |
797 | buf += n; | |
798 | len -= n; | |
d8aeda1e | 799 | cnt += n; |
1f75bb10 | 800 | |
3b0a30eb WD |
801 | if (fd == sock_f_in && io_timeout) |
802 | last_io_in = time(NULL); | |
4c36ddbe | 803 | } |
8d9dc9f9 | 804 | |
d8aeda1e | 805 | return cnt; |
4c36ddbe | 806 | } |
8d9dc9f9 | 807 | |
67b8f3df | 808 | /* Read a line into the "buf" buffer. */ |
ba525f77 | 809 | int read_line(int fd, char *buf, size_t bufsiz, int flags) |
56014c8c | 810 | { |
ba525f77 | 811 | char ch, *s, *eob; |
56014c8c | 812 | int cnt; |
56014c8c | 813 | |
ba525f77 WD |
814 | #ifdef ICONV_OPTION |
815 | if (flags & RL_CONVERT && iconv_buf.size < bufsiz) | |
816 | realloc_xbuf(&iconv_buf, bufsiz + 1024); | |
817 | #endif | |
818 | ||
56014c8c | 819 | start: |
22955408 | 820 | #ifdef ICONV_OPTION |
ba525f77 | 821 | s = flags & RL_CONVERT ? iconv_buf.buf : buf; |
22955408 WD |
822 | #else |
823 | s = buf; | |
824 | #endif | |
ba525f77 | 825 | eob = s + bufsiz - 1; |
56014c8c WD |
826 | while (1) { |
827 | cnt = read(fd, &ch, 1); | |
828 | if (cnt < 0 && (errno == EWOULDBLOCK | |
829 | || errno == EINTR || errno == EAGAIN)) { | |
830 | struct timeval tv; | |
6c850772 WD |
831 | fd_set r_fds, e_fds; |
832 | FD_ZERO(&r_fds); | |
833 | FD_SET(fd, &r_fds); | |
834 | FD_ZERO(&e_fds); | |
835 | FD_SET(fd, &e_fds); | |
e626b29e | 836 | tv.tv_sec = select_timeout; |
56014c8c | 837 | tv.tv_usec = 0; |
6c850772 | 838 | if (!select(fd+1, &r_fds, NULL, &e_fds, &tv)) |
56014c8c | 839 | check_timeout(); |
35c8fd76 WD |
840 | /*if (FD_ISSET(fd, &e_fds)) |
841 | rprintf(FINFO, "select exception on fd %d\n", fd); */ | |
56014c8c WD |
842 | continue; |
843 | } | |
844 | if (cnt != 1) | |
845 | break; | |
ba525f77 | 846 | if (flags & RL_EOL_NULLS ? ch == '\0' : (ch == '\r' || ch == '\n')) { |
67b8f3df | 847 | /* Skip empty lines if dumping comments. */ |
ba525f77 | 848 | if (flags & RL_DUMP_COMMENTS && s == buf) |
56014c8c WD |
849 | continue; |
850 | break; | |
851 | } | |
852 | if (s < eob) | |
853 | *s++ = ch; | |
854 | } | |
855 | *s = '\0'; | |
7a55d06e | 856 | |
ba525f77 | 857 | if (flags & RL_DUMP_COMMENTS && (*buf == '#' || *buf == ';')) |
56014c8c WD |
858 | goto start; |
859 | ||
ba525f77 WD |
860 | #ifdef ICONV_OPTION |
861 | if (flags & RL_CONVERT) { | |
862 | xbuf outbuf; | |
863 | INIT_XBUF(outbuf, buf, 0, bufsiz); | |
864 | iconv_buf.pos = 0; | |
865 | iconv_buf.len = s - iconv_buf.buf; | |
866 | iconvbufs(ic_recv, &iconv_buf, &outbuf, | |
867 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE); | |
868 | outbuf.buf[outbuf.len] = '\0'; | |
869 | return outbuf.len; | |
870 | } | |
871 | #endif | |
872 | ||
67b8f3df WD |
873 | return s - buf; |
874 | } | |
875 | ||
53936ef9 WD |
876 | void read_args(int f_in, char *mod_name, char *buf, size_t bufsiz, int rl_nulls, |
877 | char ***argv_p, int *argc_p, char **request_p) | |
67b8f3df WD |
878 | { |
879 | int maxargs = MAX_ARGS; | |
880 | int dot_pos = 0; | |
881 | int argc = 0; | |
882 | char **argv, *p; | |
22955408 WD |
883 | int rl_flags = (rl_nulls ? RL_EOL_NULLS : 0); |
884 | ||
885 | #ifdef ICONV_OPTION | |
886 | rl_flags |= (protect_args && ic_recv != (iconv_t)-1 ? RL_CONVERT : 0); | |
887 | #endif | |
67b8f3df WD |
888 | |
889 | if (!(argv = new_array(char *, maxargs))) | |
890 | out_of_memory("read_args"); | |
53936ef9 | 891 | if (mod_name && !protect_args) |
67b8f3df WD |
892 | argv[argc++] = "rsyncd"; |
893 | ||
894 | while (1) { | |
ba525f77 | 895 | if (read_line(f_in, buf, bufsiz, rl_flags) == 0) |
67b8f3df WD |
896 | break; |
897 | ||
53936ef9 | 898 | if (argc == maxargs-1) { |
67b8f3df WD |
899 | maxargs += MAX_ARGS; |
900 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
901 | out_of_memory("read_args"); | |
902 | } | |
903 | ||
904 | if (dot_pos) { | |
905 | if (request_p) { | |
906 | *request_p = strdup(buf); | |
907 | request_p = NULL; | |
908 | } | |
909 | if (mod_name) | |
910 | glob_expand_module(mod_name, buf, &argv, &argc, &maxargs); | |
911 | else | |
912 | glob_expand(buf, &argv, &argc, &maxargs); | |
913 | } else { | |
914 | if (!(p = strdup(buf))) | |
915 | out_of_memory("read_args"); | |
916 | argv[argc++] = p; | |
917 | if (*p == '.' && p[1] == '\0') | |
918 | dot_pos = argc; | |
919 | } | |
920 | } | |
53936ef9 | 921 | argv[argc] = NULL; |
67b8f3df | 922 | |
987a5467 WD |
923 | glob_expand(NULL, NULL, NULL, NULL); |
924 | ||
67b8f3df WD |
925 | *argc_p = argc; |
926 | *argv_p = argv; | |
56014c8c | 927 | } |
7a55d06e | 928 | |
8ef246e0 | 929 | int io_start_buffering_out(int f_out) |
1f75bb10 | 930 | { |
8ef246e0 WD |
931 | if (iobuf_out) { |
932 | assert(f_out == iobuf_f_out); | |
933 | return 0; | |
934 | } | |
1f75bb10 WD |
935 | if (!(iobuf_out = new_array(char, IO_BUFFER_SIZE))) |
936 | out_of_memory("io_start_buffering_out"); | |
937 | iobuf_out_cnt = 0; | |
8ef246e0 WD |
938 | iobuf_f_out = f_out; |
939 | return 1; | |
1f75bb10 WD |
940 | } |
941 | ||
8ef246e0 | 942 | int io_start_buffering_in(int f_in) |
1f75bb10 | 943 | { |
8ef246e0 WD |
944 | if (iobuf_in) { |
945 | assert(f_in == iobuf_f_in); | |
946 | return 0; | |
947 | } | |
1f75bb10 WD |
948 | iobuf_in_siz = 2 * IO_BUFFER_SIZE; |
949 | if (!(iobuf_in = new_array(char, iobuf_in_siz))) | |
950 | out_of_memory("io_start_buffering_in"); | |
8ef246e0 WD |
951 | iobuf_f_in = f_in; |
952 | return 1; | |
1f75bb10 WD |
953 | } |
954 | ||
8ef246e0 | 955 | void io_end_buffering_in(void) |
1f75bb10 | 956 | { |
8ef246e0 WD |
957 | if (!iobuf_in) |
958 | return; | |
959 | free(iobuf_in); | |
960 | iobuf_in = NULL; | |
961 | iobuf_in_ndx = 0; | |
962 | iobuf_in_remaining = 0; | |
963 | iobuf_f_in = -1; | |
964 | } | |
965 | ||
966 | void io_end_buffering_out(void) | |
967 | { | |
968 | if (!iobuf_out) | |
969 | return; | |
970 | io_flush(FULL_FLUSH); | |
971 | free(iobuf_out); | |
972 | iobuf_out = NULL; | |
973 | iobuf_f_out = -1; | |
1f75bb10 WD |
974 | } |
975 | ||
be91bd81 | 976 | void maybe_flush_socket(int important) |
626bec8e | 977 | { |
be91bd81 WD |
978 | if (iobuf_out && iobuf_out_cnt |
979 | && (important || time(NULL) - last_io_out >= 5)) | |
626bec8e WD |
980 | io_flush(NORMAL_FLUSH); |
981 | } | |
982 | ||
cdf236aa | 983 | void maybe_send_keepalive(void) |
9e2409ab | 984 | { |
3b0a30eb | 985 | if (time(NULL) - last_io_out >= allowed_lull) { |
9e2409ab | 986 | if (!iobuf_out || !iobuf_out_cnt) { |
3221f451 WD |
987 | if (protocol_version < 29) |
988 | return; /* there's nothing we can do */ | |
8ef246e0 | 989 | if (protocol_version >= 30) |
332cf6df | 990 | send_msg(MSG_NOOP, "", 0, 0); |
8ef246e0 | 991 | else { |
9decb4d2 | 992 | write_int(sock_f_out, cur_flist->used); |
8ef246e0 WD |
993 | write_shortint(sock_f_out, ITEM_IS_NEW); |
994 | } | |
9e2409ab WD |
995 | } |
996 | if (iobuf_out) | |
997 | io_flush(NORMAL_FLUSH); | |
998 | } | |
999 | } | |
1000 | ||
8ef246e0 WD |
1001 | void start_flist_forward(int f_in) |
1002 | { | |
1003 | assert(iobuf_out != NULL); | |
1004 | assert(iobuf_f_out == msg_fd_out); | |
1005 | flist_forward_from = f_in; | |
1006 | } | |
1007 | ||
1008 | void stop_flist_forward() | |
1009 | { | |
8ef246e0 | 1010 | flist_forward_from = -1; |
dde5b772 | 1011 | io_flush(FULL_FLUSH); |
8ef246e0 WD |
1012 | } |
1013 | ||
880da007 MP |
1014 | /** |
1015 | * Continue trying to read len bytes - don't return until len has been | |
1016 | * read. | |
1017 | **/ | |
3151cbae | 1018 | static void read_loop(int fd, char *buf, size_t len) |
4c36ddbe AT |
1019 | { |
1020 | while (len) { | |
1021 | int n = read_timeout(fd, buf, len); | |
1022 | ||
1023 | buf += n; | |
1024 | len -= n; | |
8d9dc9f9 AT |
1025 | } |
1026 | } | |
1027 | ||
7a55d06e MP |
1028 | /** |
1029 | * Read from the file descriptor handling multiplexing - return number | |
1030 | * of bytes read. | |
d62bcc17 WD |
1031 | * |
1032 | * Never returns <= 0. | |
7a55d06e | 1033 | */ |
c399d22a | 1034 | static int readfd_unbuffered(int fd, char *buf, size_t len) |
8d9dc9f9 | 1035 | { |
f2a4853c | 1036 | size_t msg_bytes; |
d8aeda1e | 1037 | int tag, cnt = 0; |
33544bf4 | 1038 | char line[BIGPATHBUFLEN]; |
8d9dc9f9 | 1039 | |
8ef246e0 | 1040 | if (!iobuf_in || fd != iobuf_f_in) |
4c36ddbe | 1041 | return read_timeout(fd, buf, len); |
8d9dc9f9 | 1042 | |
8ef246e0 WD |
1043 | if (!io_multiplexing_in && iobuf_in_remaining == 0) { |
1044 | iobuf_in_remaining = read_timeout(fd, iobuf_in, iobuf_in_siz); | |
1f75bb10 | 1045 | iobuf_in_ndx = 0; |
76c21947 WD |
1046 | } |
1047 | ||
d8aeda1e | 1048 | while (cnt == 0) { |
8ef246e0 WD |
1049 | if (iobuf_in_remaining) { |
1050 | len = MIN(len, iobuf_in_remaining); | |
1f75bb10 WD |
1051 | memcpy(buf, iobuf_in + iobuf_in_ndx, len); |
1052 | iobuf_in_ndx += len; | |
8ef246e0 | 1053 | iobuf_in_remaining -= len; |
d8aeda1e | 1054 | cnt = len; |
76c21947 | 1055 | break; |
8d9dc9f9 AT |
1056 | } |
1057 | ||
909ce14f | 1058 | read_loop(fd, line, 4); |
ff41a59f | 1059 | tag = IVAL(line, 0); |
679e7657 | 1060 | |
f2a4853c | 1061 | msg_bytes = tag & 0xFFFFFF; |
d17e1dd2 | 1062 | tag = (tag >> 24) - MPLEX_BASE; |
8d9dc9f9 | 1063 | |
d17e1dd2 WD |
1064 | switch (tag) { |
1065 | case MSG_DATA: | |
f2a4853c | 1066 | if (msg_bytes > iobuf_in_siz) { |
1f75bb10 | 1067 | if (!(iobuf_in = realloc_array(iobuf_in, char, |
f2a4853c | 1068 | msg_bytes))) |
c399d22a | 1069 | out_of_memory("readfd_unbuffered"); |
f2a4853c | 1070 | iobuf_in_siz = msg_bytes; |
76c21947 | 1071 | } |
f2a4853c | 1072 | read_loop(fd, iobuf_in, msg_bytes); |
8ef246e0 | 1073 | iobuf_in_remaining = msg_bytes; |
1f75bb10 | 1074 | iobuf_in_ndx = 0; |
d17e1dd2 | 1075 | break; |
8ef246e0 WD |
1076 | case MSG_NOOP: |
1077 | if (am_sender) | |
1078 | maybe_send_keepalive(); | |
1079 | break; | |
1080 | case MSG_IO_ERROR: | |
1081 | if (msg_bytes != 4) | |
1082 | goto invalid_msg; | |
1083 | read_loop(fd, line, msg_bytes); | |
e5f35681 | 1084 | send_msg_int(MSG_IO_ERROR, IVAL(line, 0)); |
8ef246e0 WD |
1085 | io_error |= IVAL(line, 0); |
1086 | break; | |
0d67e00a | 1087 | case MSG_DELETED: |
f2a4853c WD |
1088 | if (msg_bytes >= sizeof line) |
1089 | goto overflow; | |
332cf6df WD |
1090 | #ifdef ICONV_OPTION |
1091 | if (ic_recv != (iconv_t)-1) { | |
ba525f77 WD |
1092 | xbuf outbuf, inbuf; |
1093 | char ibuf[512]; | |
332cf6df | 1094 | int add_null = 0; |
ba525f77 WD |
1095 | int pos = 0; |
1096 | ||
1097 | INIT_CONST_XBUF(outbuf, line); | |
ee6e80c7 | 1098 | INIT_XBUF(inbuf, ibuf, 0, -1); |
ba525f77 | 1099 | |
332cf6df | 1100 | while (msg_bytes) { |
ba525f77 WD |
1101 | inbuf.len = msg_bytes > sizeof ibuf |
1102 | ? sizeof ibuf : msg_bytes; | |
1103 | read_loop(fd, inbuf.buf, inbuf.len); | |
1104 | if (!(msg_bytes -= inbuf.len) | |
1105 | && !ibuf[inbuf.len-1]) | |
1106 | inbuf.len--, add_null = 1; | |
1107 | if (iconvbufs(ic_send, &inbuf, &outbuf, | |
1108 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE) < 0) | |
1109 | goto overflow; | |
1110 | pos = -1; | |
1111 | } | |
1112 | if (add_null) { | |
1113 | if (outbuf.len == outbuf.size) | |
1114 | goto overflow; | |
1115 | outbuf.buf[outbuf.len++] = '\0'; | |
332cf6df | 1116 | } |
ba525f77 | 1117 | msg_bytes = outbuf.len; |
332cf6df WD |
1118 | } else |
1119 | #endif | |
1120 | read_loop(fd, line, msg_bytes); | |
0d67e00a | 1121 | /* A directory name was sent with the trailing null */ |
f2a4853c | 1122 | if (msg_bytes > 0 && !line[msg_bytes-1]) |
0d67e00a | 1123 | log_delete(line, S_IFDIR); |
12bda6f7 WD |
1124 | else { |
1125 | line[msg_bytes] = '\0'; | |
0d67e00a | 1126 | log_delete(line, S_IFREG); |
12bda6f7 | 1127 | } |
0d67e00a | 1128 | break; |
9981c27e | 1129 | case MSG_SUCCESS: |
f2a4853c | 1130 | if (msg_bytes != 4) { |
8ef246e0 | 1131 | invalid_msg: |
cdf236aa | 1132 | rprintf(FERROR, "invalid multi-message %d:%ld [%s]\n", |
f2a4853c | 1133 | tag, (long)msg_bytes, who_am_i()); |
9981c27e WD |
1134 | exit_cleanup(RERR_STREAMIO); |
1135 | } | |
f2a4853c | 1136 | read_loop(fd, line, msg_bytes); |
9981c27e | 1137 | successful_send(IVAL(line, 0)); |
9981c27e | 1138 | break; |
8ef246e0 WD |
1139 | case MSG_NO_SEND: |
1140 | if (msg_bytes != 4) | |
1141 | goto invalid_msg; | |
1142 | read_loop(fd, line, msg_bytes); | |
1143 | send_msg_int(MSG_NO_SEND, IVAL(line, 0)); | |
1144 | break; | |
d17e1dd2 WD |
1145 | case MSG_INFO: |
1146 | case MSG_ERROR: | |
3f0211b6 WD |
1147 | case MSG_ERROR_XFER: |
1148 | case MSG_WARNING: | |
f2a4853c WD |
1149 | if (msg_bytes >= sizeof line) { |
1150 | overflow: | |
bd9fca47 | 1151 | rprintf(FERROR, |
cdf236aa | 1152 | "multiplexing overflow %d:%ld [%s]\n", |
f2a4853c | 1153 | tag, (long)msg_bytes, who_am_i()); |
d17e1dd2 WD |
1154 | exit_cleanup(RERR_STREAMIO); |
1155 | } | |
f2a4853c | 1156 | read_loop(fd, line, msg_bytes); |
332cf6df | 1157 | rwrite((enum logcode)tag, line, msg_bytes, 1); |
7f9bf6b7 WD |
1158 | if (first_message) { |
1159 | if (list_only && !am_sender && tag == 1) { | |
1160 | line[msg_bytes] = '\0'; | |
1161 | check_for_d_option_error(line); | |
1162 | } | |
1163 | first_message = 0; | |
1164 | } | |
d17e1dd2 WD |
1165 | break; |
1166 | default: | |
cdf236aa WD |
1167 | rprintf(FERROR, "unexpected tag %d [%s]\n", |
1168 | tag, who_am_i()); | |
65417579 | 1169 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 | 1170 | } |
8d9dc9f9 AT |
1171 | } |
1172 | ||
8ef246e0 | 1173 | if (iobuf_in_remaining == 0) |
d17e1dd2 | 1174 | io_flush(NORMAL_FLUSH); |
76c21947 | 1175 | |
d8aeda1e | 1176 | return cnt; |
8d9dc9f9 AT |
1177 | } |
1178 | ||
dde5b772 WD |
1179 | /* Do a buffered read from fd. Don't return until all N bytes have |
1180 | * been read. If all N can't be read then exit with an error. */ | |
3151cbae | 1181 | static void readfd(int fd, char *buffer, size_t N) |
720b47f2 | 1182 | { |
d8aeda1e | 1183 | int cnt; |
d62bcc17 | 1184 | size_t total = 0; |
3151cbae | 1185 | |
6ba9279f | 1186 | while (total < N) { |
d8aeda1e WD |
1187 | cnt = readfd_unbuffered(fd, buffer + total, N-total); |
1188 | total += cnt; | |
7f28dbee | 1189 | } |
1b7c47cb | 1190 | |
b9f592fb WD |
1191 | if (fd == write_batch_monitor_in) { |
1192 | if ((size_t)write(batch_fd, buffer, total) != total) | |
1193 | exit_cleanup(RERR_FILEIO); | |
1194 | } | |
1f75bb10 | 1195 | |
8ef246e0 WD |
1196 | if (fd == flist_forward_from) |
1197 | writefd(iobuf_f_out, buffer, total); | |
1198 | ||
1f75bb10 WD |
1199 | if (fd == sock_f_in) |
1200 | stats.total_read += total; | |
720b47f2 AT |
1201 | } |
1202 | ||
3a993aa4 | 1203 | unsigned short read_shortint(int f) |
9361f839 | 1204 | { |
482f48cc WD |
1205 | char b[2]; |
1206 | readfd(f, b, 2); | |
1207 | return (UVAL(b, 1) << 8) + UVAL(b, 0); | |
9361f839 WD |
1208 | } |
1209 | ||
b7922338 | 1210 | int32 read_int(int f) |
720b47f2 | 1211 | { |
4c36ddbe | 1212 | char b[4]; |
d8aeda1e | 1213 | int32 num; |
d730b113 | 1214 | |
482f48cc WD |
1215 | readfd(f, b, 4); |
1216 | num = IVAL(b, 0); | |
1217 | #if SIZEOF_INT32 > 4 | |
1218 | if (num & (int32)0x80000000) | |
1219 | num |= ~(int32)0xffffffff; | |
1220 | #endif | |
d8aeda1e | 1221 | return num; |
720b47f2 AT |
1222 | } |
1223 | ||
351e23ad | 1224 | int32 read_varint(int f) |
3a6a366f | 1225 | { |
351e23ad WD |
1226 | union { |
1227 | char b[5]; | |
1228 | int32 x; | |
1229 | } u; | |
1230 | uchar ch; | |
1231 | int extra; | |
1232 | ||
1233 | u.x = 0; | |
1234 | readfd(f, (char*)&ch, 1); | |
1235 | extra = int_byte_extra[ch / 4]; | |
1236 | if (extra) { | |
1237 | uchar bit = ((uchar)1<<(8-extra)); | |
1238 | if (extra >= (int)sizeof u.b) { | |
1239 | rprintf(FERROR, "Overflow in read_varint()\n"); | |
1240 | exit_cleanup(RERR_STREAMIO); | |
1241 | } | |
1242 | readfd(f, u.b, extra); | |
1243 | u.b[extra] = ch & (bit-1); | |
1244 | } else | |
1245 | u.b[0] = ch; | |
1246 | #if CAREFUL_ALIGNMENT | |
1247 | u.x = IVAL(u.b,0); | |
1248 | #endif | |
1249 | #if SIZEOF_INT32 > 4 | |
1250 | if (u.x & (int32)0x80000000) | |
1251 | u.x |= ~(int32)0xffffffff; | |
1252 | #endif | |
1253 | return u.x; | |
1254 | } | |
71c46176 | 1255 | |
351e23ad WD |
1256 | int64 read_varlong(int f, uchar min_bytes) |
1257 | { | |
1258 | union { | |
1259 | char b[9]; | |
1260 | int64 x; | |
1261 | } u; | |
1262 | char b2[8]; | |
1263 | int extra; | |
71c46176 | 1264 | |
031fa9ad | 1265 | #if SIZEOF_INT64 < 8 |
351e23ad | 1266 | memset(u.b, 0, 8); |
031fa9ad | 1267 | #else |
351e23ad | 1268 | u.x = 0; |
031fa9ad | 1269 | #endif |
351e23ad WD |
1270 | readfd(f, b2, min_bytes); |
1271 | memcpy(u.b, b2+1, min_bytes-1); | |
1272 | extra = int_byte_extra[CVAL(b2, 0) / 4]; | |
1273 | if (extra) { | |
1274 | uchar bit = ((uchar)1<<(8-extra)); | |
1275 | if (min_bytes + extra > (int)sizeof u.b) { | |
1276 | rprintf(FERROR, "Overflow in read_varlong()\n"); | |
1277 | exit_cleanup(RERR_STREAMIO); | |
1278 | } | |
1279 | readfd(f, u.b + min_bytes - 1, extra); | |
1280 | u.b[min_bytes + extra - 1] = CVAL(b2, 0) & (bit-1); | |
4ea4acf1 | 1281 | #if SIZEOF_INT64 < 8 |
351e23ad | 1282 | if (min_bytes + extra > 5 || u.b[4] || CVAL(u.b,3) & 0x80) { |
4ea4acf1 WD |
1283 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); |
1284 | exit_cleanup(RERR_UNSUPPORTED); | |
1285 | } | |
1286 | #endif | |
351e23ad WD |
1287 | } else |
1288 | u.b[min_bytes + extra - 1] = CVAL(b2, 0); | |
1289 | #if SIZEOF_INT64 < 8 | |
1290 | u.x = IVAL(u.b,0); | |
1291 | #elif CAREFUL_ALIGNMENT | |
1292 | u.x = IVAL(u.b,0) | (((int64)IVAL(u.b,4))<<32); | |
1293 | #endif | |
1294 | return u.x; | |
1295 | } | |
1296 | ||
1297 | int64 read_longint(int f) | |
1298 | { | |
4ea4acf1 | 1299 | #if SIZEOF_INT64 >= 8 |
351e23ad | 1300 | char b[9]; |
4ea4acf1 | 1301 | #endif |
351e23ad | 1302 | int32 num = read_int(f); |
71c46176 | 1303 | |
351e23ad WD |
1304 | if (num != (int32)0xffffffff) |
1305 | return num; | |
1306 | ||
1307 | #if SIZEOF_INT64 < 8 | |
1308 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); | |
1309 | exit_cleanup(RERR_UNSUPPORTED); | |
1310 | #else | |
1311 | readfd(f, b, 8); | |
1312 | return IVAL(b,0) | (((int64)IVAL(b,4))<<32); | |
1313 | #endif | |
3a6a366f AT |
1314 | } |
1315 | ||
4a19c3b2 | 1316 | void read_buf(int f, char *buf, size_t len) |
720b47f2 | 1317 | { |
4c36ddbe | 1318 | readfd(f,buf,len); |
720b47f2 AT |
1319 | } |
1320 | ||
4a19c3b2 | 1321 | void read_sbuf(int f, char *buf, size_t len) |
575f2fca | 1322 | { |
93095cbe | 1323 | readfd(f, buf, len); |
af436313 | 1324 | buf[len] = '\0'; |
575f2fca AT |
1325 | } |
1326 | ||
9361f839 | 1327 | uchar read_byte(int f) |
182dca5c | 1328 | { |
9361f839 | 1329 | uchar c; |
93095cbe | 1330 | readfd(f, (char *)&c, 1); |
4c36ddbe | 1331 | return c; |
182dca5c | 1332 | } |
720b47f2 | 1333 | |
46e99b09 WD |
1334 | int read_vstring(int f, char *buf, int bufsize) |
1335 | { | |
1336 | int len = read_byte(f); | |
1337 | ||
1338 | if (len & 0x80) | |
1339 | len = (len & ~0x80) * 0x100 + read_byte(f); | |
1340 | ||
1341 | if (len >= bufsize) { | |
1342 | rprintf(FERROR, "over-long vstring received (%d > %d)\n", | |
1343 | len, bufsize - 1); | |
9a6ed83f | 1344 | return -1; |
46e99b09 WD |
1345 | } |
1346 | ||
1347 | if (len) | |
1348 | readfd(f, buf, len); | |
1349 | buf[len] = '\0'; | |
1350 | return len; | |
1351 | } | |
1352 | ||
188fed95 WD |
1353 | /* Populate a sum_struct with values from the socket. This is |
1354 | * called by both the sender and the receiver. */ | |
1355 | void read_sum_head(int f, struct sum_struct *sum) | |
1356 | { | |
8bd77e70 | 1357 | int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE; |
188fed95 | 1358 | sum->count = read_int(f); |
c638caa6 WD |
1359 | if (sum->count < 0) { |
1360 | rprintf(FERROR, "Invalid checksum count %ld [%s]\n", | |
1361 | (long)sum->count, who_am_i()); | |
1362 | exit_cleanup(RERR_PROTOCOL); | |
1363 | } | |
188fed95 | 1364 | sum->blength = read_int(f); |
8bd77e70 | 1365 | if (sum->blength < 0 || sum->blength > max_blength) { |
cdf236aa WD |
1366 | rprintf(FERROR, "Invalid block length %ld [%s]\n", |
1367 | (long)sum->blength, who_am_i()); | |
188fed95 WD |
1368 | exit_cleanup(RERR_PROTOCOL); |
1369 | } | |
1370 | sum->s2length = protocol_version < 27 ? csum_length : (int)read_int(f); | |
a0456b9c | 1371 | if (sum->s2length < 0 || sum->s2length > MAX_DIGEST_LEN) { |
cdf236aa WD |
1372 | rprintf(FERROR, "Invalid checksum length %d [%s]\n", |
1373 | sum->s2length, who_am_i()); | |
188fed95 WD |
1374 | exit_cleanup(RERR_PROTOCOL); |
1375 | } | |
1376 | sum->remainder = read_int(f); | |
1377 | if (sum->remainder < 0 || sum->remainder > sum->blength) { | |
cdf236aa WD |
1378 | rprintf(FERROR, "Invalid remainder length %ld [%s]\n", |
1379 | (long)sum->remainder, who_am_i()); | |
188fed95 WD |
1380 | exit_cleanup(RERR_PROTOCOL); |
1381 | } | |
1382 | } | |
1383 | ||
c207d7ec WD |
1384 | /* Send the values from a sum_struct over the socket. Set sum to |
1385 | * NULL if there are no checksums to send. This is called by both | |
1386 | * the generator and the sender. */ | |
1387 | void write_sum_head(int f, struct sum_struct *sum) | |
1388 | { | |
1389 | static struct sum_struct null_sum; | |
1390 | ||
1391 | if (sum == NULL) | |
1392 | sum = &null_sum; | |
1393 | ||
1394 | write_int(f, sum->count); | |
1395 | write_int(f, sum->blength); | |
1396 | if (protocol_version >= 27) | |
1397 | write_int(f, sum->s2length); | |
1398 | write_int(f, sum->remainder); | |
1399 | } | |
1400 | ||
08571358 MP |
1401 | /** |
1402 | * Sleep after writing to limit I/O bandwidth usage. | |
1403 | * | |
1404 | * @todo Rather than sleeping after each write, it might be better to | |
1405 | * use some kind of averaging. The current algorithm seems to always | |
1406 | * use a bit less bandwidth than specified, because it doesn't make up | |
1407 | * for slow periods. But arguably this is a feature. In addition, we | |
1408 | * ought to take the time used to write the data into account. | |
71e58630 WD |
1409 | * |
1410 | * During some phases of big transfers (file FOO is uptodate) this is | |
1411 | * called with a small bytes_written every time. As the kernel has to | |
1412 | * round small waits up to guarantee that we actually wait at least the | |
1413 | * requested number of microseconds, this can become grossly inaccurate. | |
1414 | * We therefore keep track of the bytes we've written over time and only | |
1415 | * sleep when the accumulated delay is at least 1 tenth of a second. | |
08571358 MP |
1416 | **/ |
1417 | static void sleep_for_bwlimit(int bytes_written) | |
1418 | { | |
71e58630 | 1419 | static struct timeval prior_tv; |
0f78b815 | 1420 | static long total_written = 0; |
71e58630 WD |
1421 | struct timeval tv, start_tv; |
1422 | long elapsed_usec, sleep_usec; | |
1423 | ||
1424 | #define ONE_SEC 1000000L /* # of microseconds in a second */ | |
08571358 | 1425 | |
9a0cfff5 | 1426 | if (!bwlimit_writemax) |
08571358 | 1427 | return; |
e681e820 | 1428 | |
0f78b815 | 1429 | total_written += bytes_written; |
71e58630 WD |
1430 | |
1431 | gettimeofday(&start_tv, NULL); | |
1432 | if (prior_tv.tv_sec) { | |
1433 | elapsed_usec = (start_tv.tv_sec - prior_tv.tv_sec) * ONE_SEC | |
1434 | + (start_tv.tv_usec - prior_tv.tv_usec); | |
1435 | total_written -= elapsed_usec * bwlimit / (ONE_SEC/1024); | |
1436 | if (total_written < 0) | |
1437 | total_written = 0; | |
1438 | } | |
3151cbae | 1439 | |
71e58630 WD |
1440 | sleep_usec = total_written * (ONE_SEC/1024) / bwlimit; |
1441 | if (sleep_usec < ONE_SEC / 10) { | |
1442 | prior_tv = start_tv; | |
1443 | return; | |
1444 | } | |
08571358 | 1445 | |
71e58630 WD |
1446 | tv.tv_sec = sleep_usec / ONE_SEC; |
1447 | tv.tv_usec = sleep_usec % ONE_SEC; | |
98b332ed | 1448 | select(0, NULL, NULL, NULL, &tv); |
71e58630 WD |
1449 | |
1450 | gettimeofday(&prior_tv, NULL); | |
1451 | elapsed_usec = (prior_tv.tv_sec - start_tv.tv_sec) * ONE_SEC | |
1452 | + (prior_tv.tv_usec - start_tv.tv_usec); | |
1453 | total_written = (sleep_usec - elapsed_usec) * bwlimit / (ONE_SEC/1024); | |
08571358 MP |
1454 | } |
1455 | ||
1f75bb10 | 1456 | /* Write len bytes to the file descriptor fd, looping as necessary to get |
0fb2fc4a | 1457 | * the job done and also (in certain circumstances) reading any data on |
af436313 | 1458 | * msg_fd_in to avoid deadlock. |
880da007 MP |
1459 | * |
1460 | * This function underlies the multiplexing system. The body of the | |
1f75bb10 | 1461 | * application never calls this function directly. */ |
4a19c3b2 | 1462 | static void writefd_unbuffered(int fd, const char *buf, size_t len) |
720b47f2 | 1463 | { |
1ea087a7 | 1464 | size_t n, total = 0; |
6c850772 | 1465 | fd_set w_fds, r_fds, e_fds; |
d8aeda1e | 1466 | int maxfd, count, cnt, using_r_fds; |
e4c877cf | 1467 | int defer_inc = 0; |
8d9dc9f9 | 1468 | struct timeval tv; |
720b47f2 | 1469 | |
3be97bf9 | 1470 | if (no_flush++) |
e4c877cf | 1471 | defer_forwarding_messages++, defer_inc++; |
e44f9a12 | 1472 | |
4c36ddbe | 1473 | while (total < len) { |
8d9dc9f9 | 1474 | FD_ZERO(&w_fds); |
6c850772 WD |
1475 | FD_SET(fd, &w_fds); |
1476 | FD_ZERO(&e_fds); | |
1477 | FD_SET(fd, &e_fds); | |
1ea087a7 | 1478 | maxfd = fd; |
4c36ddbe | 1479 | |
954bbed8 | 1480 | if (msg_fd_in >= 0) { |
56014c8c | 1481 | FD_ZERO(&r_fds); |
6c850772 | 1482 | FD_SET(msg_fd_in, &r_fds); |
1ea087a7 WD |
1483 | if (msg_fd_in > maxfd) |
1484 | maxfd = msg_fd_in; | |
3eeac9bc WD |
1485 | using_r_fds = 1; |
1486 | } else | |
1487 | using_r_fds = 0; | |
8d9dc9f9 | 1488 | |
e626b29e | 1489 | tv.tv_sec = select_timeout; |
8d9dc9f9 | 1490 | tv.tv_usec = 0; |
4c36ddbe | 1491 | |
554e0a8d | 1492 | errno = 0; |
3eeac9bc | 1493 | count = select(maxfd + 1, using_r_fds ? &r_fds : NULL, |
6c850772 | 1494 | &w_fds, &e_fds, &tv); |
4c36ddbe AT |
1495 | |
1496 | if (count <= 0) { | |
1ea087a7 | 1497 | if (count < 0 && errno == EBADF) |
554e0a8d | 1498 | exit_cleanup(RERR_SOCKETIO); |
bd717af8 | 1499 | check_timeout(); |
8d9dc9f9 AT |
1500 | continue; |
1501 | } | |
4c36ddbe | 1502 | |
35c8fd76 WD |
1503 | /*if (FD_ISSET(fd, &e_fds)) |
1504 | rprintf(FINFO, "select exception on fd %d\n", fd); */ | |
6c850772 | 1505 | |
3eeac9bc | 1506 | if (using_r_fds && FD_ISSET(msg_fd_in, &r_fds)) |
d17e1dd2 | 1507 | read_msg_fd(); |
554e0a8d | 1508 | |
9a6ed83f | 1509 | if (!FD_ISSET(fd, &w_fds)) |
1ea087a7 | 1510 | continue; |
4c36ddbe | 1511 | |
1ea087a7 | 1512 | n = len - total; |
9a0cfff5 | 1513 | if (bwlimit_writemax && n > bwlimit_writemax) |
1ea087a7 | 1514 | n = bwlimit_writemax; |
d8aeda1e | 1515 | cnt = write(fd, buf + total, n); |
1ea087a7 | 1516 | |
d8aeda1e WD |
1517 | if (cnt <= 0) { |
1518 | if (cnt < 0) { | |
3309507d WD |
1519 | if (errno == EINTR) |
1520 | continue; | |
1521 | if (errno == EWOULDBLOCK || errno == EAGAIN) { | |
1522 | msleep(1); | |
1523 | continue; | |
1524 | } | |
f0359dd0 AT |
1525 | } |
1526 | ||
1ea087a7 | 1527 | /* Don't try to write errors back across the stream. */ |
1f75bb10 | 1528 | if (fd == sock_f_out) |
8ef246e0 | 1529 | io_end_multiplex_out(); |
2a5df862 WD |
1530 | /* Don't try to write errors down a failing msg pipe. */ |
1531 | if (am_server && fd == msg_fd_out) | |
1532 | exit_cleanup(RERR_STREAMIO); | |
1ea087a7 | 1533 | rsyserr(FERROR, errno, |
b88c2e8f WD |
1534 | "writefd_unbuffered failed to write %ld bytes [%s]", |
1535 | (long)len, who_am_i()); | |
d1b31da7 WD |
1536 | /* If the other side is sending us error messages, try |
1537 | * to grab any messages they sent before they died. */ | |
f2179fd3 | 1538 | while (!am_server && fd == sock_f_out && io_multiplexing_in) { |
ba525f77 | 1539 | char buf[1024]; |
3b0a30eb | 1540 | set_io_timeout(30); |
9e2409ab | 1541 | ignore_timeout = 0; |
ba525f77 | 1542 | readfd_unbuffered(sock_f_in, buf, sizeof buf); |
d1b31da7 | 1543 | } |
1ea087a7 WD |
1544 | exit_cleanup(RERR_STREAMIO); |
1545 | } | |
4c36ddbe | 1546 | |
d8aeda1e | 1547 | total += cnt; |
e4c877cf | 1548 | defer_forwarding_messages++, defer_inc++; |
a800434a | 1549 | |
1f75bb10 | 1550 | if (fd == sock_f_out) { |
626bec8e | 1551 | if (io_timeout || am_generator) |
3b0a30eb | 1552 | last_io_out = time(NULL); |
d8aeda1e | 1553 | sleep_for_bwlimit(cnt); |
1f75bb10 | 1554 | } |
4c36ddbe | 1555 | } |
e44f9a12 AT |
1556 | |
1557 | no_flush--; | |
17a4977b WD |
1558 | defer_inc -= defer_forwarding_keep; |
1559 | if (!(defer_forwarding_messages -= defer_inc) && !no_flush) | |
e4c877cf | 1560 | msg_flush(); |
d6dead6b AT |
1561 | } |
1562 | ||
dde5b772 | 1563 | void io_flush(int flush_it_all) |
d6dead6b | 1564 | { |
1f75bb10 | 1565 | if (!iobuf_out_cnt || no_flush) |
d17e1dd2 | 1566 | return; |
8d9dc9f9 | 1567 | |
d17e1dd2 | 1568 | if (io_multiplexing_out) |
332cf6df | 1569 | mplex_write(sock_f_out, MSG_DATA, iobuf_out, iobuf_out_cnt, 0); |
d17e1dd2 | 1570 | else |
8ef246e0 | 1571 | writefd_unbuffered(iobuf_f_out, iobuf_out, iobuf_out_cnt); |
1f75bb10 | 1572 | iobuf_out_cnt = 0; |
e4c877cf WD |
1573 | |
1574 | if (flush_it_all && !defer_forwarding_messages) | |
1575 | msg_flush(); | |
8d9dc9f9 AT |
1576 | } |
1577 | ||
4a19c3b2 | 1578 | static void writefd(int fd, const char *buf, size_t len) |
d6dead6b | 1579 | { |
1f75bb10 WD |
1580 | if (fd == sock_f_out) |
1581 | stats.total_written += len; | |
1582 | ||
b9f592fb WD |
1583 | if (fd == write_batch_monitor_out) { |
1584 | if ((size_t)write(batch_fd, buf, len) != len) | |
1585 | exit_cleanup(RERR_FILEIO); | |
1586 | } | |
1587 | ||
8ef246e0 | 1588 | if (!iobuf_out || fd != iobuf_f_out) { |
4c36ddbe AT |
1589 | writefd_unbuffered(fd, buf, len); |
1590 | return; | |
1591 | } | |
d6dead6b AT |
1592 | |
1593 | while (len) { | |
1f75bb10 | 1594 | int n = MIN((int)len, IO_BUFFER_SIZE - iobuf_out_cnt); |
d6dead6b | 1595 | if (n > 0) { |
1f75bb10 | 1596 | memcpy(iobuf_out+iobuf_out_cnt, buf, n); |
d6dead6b AT |
1597 | buf += n; |
1598 | len -= n; | |
1f75bb10 | 1599 | iobuf_out_cnt += n; |
d6dead6b | 1600 | } |
3151cbae | 1601 | |
1f75bb10 | 1602 | if (iobuf_out_cnt == IO_BUFFER_SIZE) |
d17e1dd2 | 1603 | io_flush(NORMAL_FLUSH); |
d6dead6b | 1604 | } |
d6dead6b | 1605 | } |
720b47f2 | 1606 | |
3a993aa4 | 1607 | void write_shortint(int f, unsigned short x) |
9361f839 | 1608 | { |
3a993aa4 WD |
1609 | char b[2]; |
1610 | b[0] = (char)x; | |
1611 | b[1] = (char)(x >> 8); | |
1612 | writefd(f, b, 2); | |
9361f839 WD |
1613 | } |
1614 | ||
351e23ad WD |
1615 | void write_int(int f, int32 x) |
1616 | { | |
1617 | char b[4]; | |
1618 | SIVAL(b, 0, x); | |
1619 | writefd(f, b, 4); | |
1620 | } | |
1621 | ||
f31514ad | 1622 | void write_varint(int f, int32 x) |
1c3344a1 WD |
1623 | { |
1624 | char b[5]; | |
351e23ad WD |
1625 | uchar bit; |
1626 | int cnt = 4; | |
1627 | ||
1628 | SIVAL(b, 1, x); | |
1629 | ||
1630 | while (cnt > 1 && b[cnt] == 0) | |
1631 | cnt--; | |
1632 | bit = ((uchar)1<<(7-cnt+1)); | |
1633 | if (CVAL(b, cnt) >= bit) { | |
1634 | cnt++; | |
1635 | *b = ~(bit-1); | |
1636 | } else if (cnt > 1) | |
1637 | *b = b[cnt] | ~(bit*2-1); | |
1638 | else | |
1639 | *b = b[cnt]; | |
1640 | ||
1641 | writefd(f, b, cnt); | |
1c3344a1 WD |
1642 | } |
1643 | ||
351e23ad | 1644 | void write_varlong(int f, int64 x, uchar min_bytes) |
720b47f2 | 1645 | { |
351e23ad WD |
1646 | char b[9]; |
1647 | uchar bit; | |
1648 | int cnt = 8; | |
1649 | ||
1650 | SIVAL(b, 1, x); | |
1651 | #if SIZEOF_INT64 >= 8 | |
1652 | SIVAL(b, 5, x >> 32); | |
1653 | #else | |
1654 | if (x <= 0x7FFFFFFF && x >= 0) | |
1655 | memset(b + 5, 0, 4); | |
1656 | else { | |
1657 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); | |
1658 | exit_cleanup(RERR_UNSUPPORTED); | |
1659 | } | |
1660 | #endif | |
1661 | ||
1662 | while (cnt > min_bytes && b[cnt] == 0) | |
1663 | cnt--; | |
1664 | bit = ((uchar)1<<(7-cnt+min_bytes)); | |
1665 | if (CVAL(b, cnt) >= bit) { | |
1666 | cnt++; | |
1667 | *b = ~(bit-1); | |
1668 | } else if (cnt > min_bytes) | |
1669 | *b = b[cnt] | ~(bit*2-1); | |
1670 | else | |
1671 | *b = b[cnt]; | |
1672 | ||
1673 | writefd(f, b, cnt); | |
720b47f2 AT |
1674 | } |
1675 | ||
7a24c346 MP |
1676 | /* |
1677 | * Note: int64 may actually be a 32-bit type if ./configure couldn't find any | |
1678 | * 64-bit types on this platform. | |
1679 | */ | |
71c46176 | 1680 | void write_longint(int f, int64 x) |
3a6a366f | 1681 | { |
351e23ad | 1682 | char b[12], * const s = b+4; |
3a6a366f | 1683 | |
351e23ad WD |
1684 | SIVAL(s, 0, x); |
1685 | if (x <= 0x7FFFFFFF && x >= 0) { | |
482f48cc | 1686 | writefd(f, s, 4); |
351e23ad WD |
1687 | return; |
1688 | } | |
3a6a366f | 1689 | |
4ea4acf1 | 1690 | #if SIZEOF_INT64 < 8 |
351e23ad WD |
1691 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); |
1692 | exit_cleanup(RERR_UNSUPPORTED); | |
4ea4acf1 | 1693 | #else |
351e23ad WD |
1694 | memset(b, 0xFF, 4); |
1695 | SIVAL(s, 4, x >> 32); | |
1696 | writefd(f, b, 12); | |
4ea4acf1 | 1697 | #endif |
3a6a366f AT |
1698 | } |
1699 | ||
4a19c3b2 | 1700 | void write_buf(int f, const char *buf, size_t len) |
720b47f2 | 1701 | { |
4c36ddbe | 1702 | writefd(f,buf,len); |
720b47f2 AT |
1703 | } |
1704 | ||
880da007 | 1705 | /** Write a string to the connection */ |
4a19c3b2 | 1706 | void write_sbuf(int f, const char *buf) |
f0fca04e | 1707 | { |
93095cbe | 1708 | writefd(f, buf, strlen(buf)); |
f0fca04e AT |
1709 | } |
1710 | ||
9361f839 | 1711 | void write_byte(int f, uchar c) |
182dca5c | 1712 | { |
93095cbe | 1713 | writefd(f, (char *)&c, 1); |
182dca5c AT |
1714 | } |
1715 | ||
4a19c3b2 | 1716 | void write_vstring(int f, const char *str, int len) |
46e99b09 WD |
1717 | { |
1718 | uchar lenbuf[3], *lb = lenbuf; | |
1719 | ||
1720 | if (len > 0x7F) { | |
1721 | if (len > 0x7FFF) { | |
1722 | rprintf(FERROR, | |
1723 | "attempting to send over-long vstring (%d > %d)\n", | |
1724 | len, 0x7FFF); | |
1725 | exit_cleanup(RERR_PROTOCOL); | |
1726 | } | |
1727 | *lb++ = len / 0x100 + 0x80; | |
1728 | } | |
1729 | *lb = len; | |
1730 | ||
1731 | writefd(f, (char*)lenbuf, lb - lenbuf + 1); | |
1732 | if (len) | |
1733 | writefd(f, str, len); | |
1734 | } | |
1735 | ||
8a65e0ce WD |
1736 | /* Send a file-list index using a byte-reduction method. */ |
1737 | void write_ndx(int f, int32 ndx) | |
1738 | { | |
1739 | static int32 prev_positive = -1, prev_negative = 1; | |
1740 | int32 diff, cnt = 0; | |
1741 | char b[6]; | |
1742 | ||
1743 | if (protocol_version < 30 || read_batch) { | |
1744 | write_int(f, ndx); | |
1745 | return; | |
1746 | } | |
1747 | ||
1748 | /* Send NDX_DONE as a single-byte 0 with no side effects. Send | |
1749 | * negative nums as a positive after sending a leading 0xFF. */ | |
1750 | if (ndx >= 0) { | |
1751 | diff = ndx - prev_positive; | |
1752 | prev_positive = ndx; | |
1753 | } else if (ndx == NDX_DONE) { | |
1754 | *b = 0; | |
1755 | writefd(f, b, 1); | |
1756 | return; | |
1757 | } else { | |
1758 | b[cnt++] = (char)0xFF; | |
1759 | ndx = -ndx; | |
1760 | diff = ndx - prev_negative; | |
1761 | prev_negative = ndx; | |
1762 | } | |
1763 | ||
1764 | /* A diff of 1 - 253 is sent as a one-byte diff; a diff of 254 - 32767 | |
1765 | * or 0 is sent as a 0xFE + a two-byte diff; otherwise we send 0xFE | |
1766 | * & all 4 bytes of the (non-negative) num with the high-bit set. */ | |
1767 | if (diff < 0xFE && diff > 0) | |
1768 | b[cnt++] = (char)diff; | |
1769 | else if (diff < 0 || diff > 0x7FFF) { | |
1770 | b[cnt++] = (char)0xFE; | |
1771 | b[cnt++] = (char)((ndx >> 24) | 0x80); | |
8a65e0ce | 1772 | b[cnt++] = (char)ndx; |
351e23ad WD |
1773 | b[cnt++] = (char)(ndx >> 8); |
1774 | b[cnt++] = (char)(ndx >> 16); | |
8a65e0ce WD |
1775 | } else { |
1776 | b[cnt++] = (char)0xFE; | |
1777 | b[cnt++] = (char)(diff >> 8); | |
1778 | b[cnt++] = (char)diff; | |
1779 | } | |
1780 | writefd(f, b, cnt); | |
1781 | } | |
1782 | ||
1783 | /* Receive a file-list index using a byte-reduction method. */ | |
1784 | int32 read_ndx(int f) | |
1785 | { | |
1786 | static int32 prev_positive = -1, prev_negative = 1; | |
1787 | int32 *prev_ptr, num; | |
1788 | char b[4]; | |
1789 | ||
1790 | if (protocol_version < 30) | |
1791 | return read_int(f); | |
1792 | ||
1793 | readfd(f, b, 1); | |
1794 | if (CVAL(b, 0) == 0xFF) { | |
1795 | readfd(f, b, 1); | |
1796 | prev_ptr = &prev_negative; | |
1797 | } else if (CVAL(b, 0) == 0) | |
1798 | return NDX_DONE; | |
1799 | else | |
1800 | prev_ptr = &prev_positive; | |
1801 | if (CVAL(b, 0) == 0xFE) { | |
1802 | readfd(f, b, 2); | |
1803 | if (CVAL(b, 0) & 0x80) { | |
351e23ad WD |
1804 | b[3] = CVAL(b, 0) & ~0x80; |
1805 | b[0] = b[1]; | |
1806 | readfd(f, b+1, 2); | |
1807 | num = IVAL(b, 0); | |
8a65e0ce | 1808 | } else |
351e23ad | 1809 | num = (UVAL(b,0)<<8) + UVAL(b,1) + *prev_ptr; |
8a65e0ce | 1810 | } else |
351e23ad | 1811 | num = UVAL(b, 0) + *prev_ptr; |
8a65e0ce WD |
1812 | *prev_ptr = num; |
1813 | if (prev_ptr == &prev_negative) | |
1814 | num = -num; | |
1815 | return num; | |
1816 | } | |
1817 | ||
67b8f3df WD |
1818 | /* Read a line of up to bufsiz-1 characters into buf. Strips |
1819 | * the (required) trailing newline and all carriage returns. | |
1820 | * Returns 1 for success; 0 for I/O error or truncation. */ | |
1821 | int read_line_old(int f, char *buf, size_t bufsiz) | |
f0fca04e | 1822 | { |
67b8f3df WD |
1823 | bufsiz--; /* leave room for the null */ |
1824 | while (bufsiz > 0) { | |
528bfcd7 | 1825 | buf[0] = 0; |
f0fca04e | 1826 | read_buf(f, buf, 1); |
914cc65c MP |
1827 | if (buf[0] == 0) |
1828 | return 0; | |
6ed6d7f5 | 1829 | if (buf[0] == '\n') |
f0fca04e | 1830 | break; |
f0fca04e AT |
1831 | if (buf[0] != '\r') { |
1832 | buf++; | |
67b8f3df | 1833 | bufsiz--; |
f0fca04e AT |
1834 | } |
1835 | } | |
6ed6d7f5 | 1836 | *buf = '\0'; |
67b8f3df | 1837 | return bufsiz > 0; |
f0fca04e AT |
1838 | } |
1839 | ||
f0fca04e AT |
1840 | void io_printf(int fd, const char *format, ...) |
1841 | { | |
d62bcc17 | 1842 | va_list ap; |
33544bf4 | 1843 | char buf[BIGPATHBUFLEN]; |
f0fca04e | 1844 | int len; |
3151cbae | 1845 | |
f0fca04e | 1846 | va_start(ap, format); |
3151cbae | 1847 | len = vsnprintf(buf, sizeof buf, format, ap); |
f0fca04e AT |
1848 | va_end(ap); |
1849 | ||
f89b9368 WD |
1850 | if (len < 0) |
1851 | exit_cleanup(RERR_STREAMIO); | |
f0fca04e | 1852 | |
33544bf4 WD |
1853 | if (len > (int)sizeof buf) { |
1854 | rprintf(FERROR, "io_printf() was too long for the buffer.\n"); | |
1855 | exit_cleanup(RERR_STREAMIO); | |
1856 | } | |
1857 | ||
f0fca04e AT |
1858 | write_sbuf(fd, buf); |
1859 | } | |
8d9dc9f9 | 1860 | |
d17e1dd2 | 1861 | /** Setup for multiplexing a MSG_* stream with the data stream. */ |
1f75bb10 | 1862 | void io_start_multiplex_out(void) |
8d9dc9f9 | 1863 | { |
d17e1dd2 | 1864 | io_flush(NORMAL_FLUSH); |
8ef246e0 | 1865 | io_start_buffering_out(sock_f_out); |
8d9dc9f9 AT |
1866 | io_multiplexing_out = 1; |
1867 | } | |
1868 | ||
d17e1dd2 | 1869 | /** Setup for multiplexing a MSG_* stream with the data stream. */ |
1f75bb10 | 1870 | void io_start_multiplex_in(void) |
8d9dc9f9 | 1871 | { |
d17e1dd2 | 1872 | io_flush(NORMAL_FLUSH); |
8ef246e0 | 1873 | io_start_buffering_in(sock_f_in); |
8d9dc9f9 AT |
1874 | io_multiplexing_in = 1; |
1875 | } | |
1876 | ||
d17e1dd2 | 1877 | /** Write an message to the multiplexed data stream. */ |
332cf6df | 1878 | int io_multiplex_write(enum msgcode code, const char *buf, size_t len, int convert) |
8d9dc9f9 | 1879 | { |
f89b9368 WD |
1880 | if (!io_multiplexing_out) |
1881 | return 0; | |
d17e1dd2 | 1882 | io_flush(NORMAL_FLUSH); |
1b7c47cb | 1883 | stats.total_written += (len+4); |
332cf6df | 1884 | mplex_write(sock_f_out, code, buf, len, convert); |
8d9dc9f9 AT |
1885 | return 1; |
1886 | } | |
1887 | ||
8ef246e0 | 1888 | void io_end_multiplex_in(void) |
7f459268 WD |
1889 | { |
1890 | io_multiplexing_in = 0; | |
8ef246e0 | 1891 | io_end_buffering_in(); |
7f459268 WD |
1892 | } |
1893 | ||
d17e1dd2 | 1894 | /** Stop output multiplexing. */ |
8ef246e0 | 1895 | void io_end_multiplex_out(void) |
554e0a8d AT |
1896 | { |
1897 | io_multiplexing_out = 0; | |
8ef246e0 | 1898 | io_end_buffering_out(); |
554e0a8d AT |
1899 | } |
1900 | ||
b9f592fb WD |
1901 | void start_write_batch(int fd) |
1902 | { | |
1903 | /* Some communication has already taken place, but we don't | |
1904 | * enable batch writing until here so that we can write a | |
1905 | * canonical record of the communication even though the | |
1906 | * actual communication so far depends on whether a daemon | |
1907 | * is involved. */ | |
1908 | write_int(batch_fd, protocol_version); | |
71456d30 WD |
1909 | if (protocol_version >= 30) |
1910 | write_byte(batch_fd, inc_recurse); | |
b9f592fb | 1911 | write_int(batch_fd, checksum_seed); |
b9f592fb WD |
1912 | |
1913 | if (am_sender) | |
1914 | write_batch_monitor_out = fd; | |
1915 | else | |
1916 | write_batch_monitor_in = fd; | |
1917 | } | |
1918 | ||
1919 | void stop_write_batch(void) | |
1920 | { | |
1921 | write_batch_monitor_out = -1; | |
1922 | write_batch_monitor_in = -1; | |
1923 | } |