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; |
d17e1dd2 WD |
39 | extern int am_server; |
40 | extern int am_daemon; | |
41 | extern int am_sender; | |
98f8c9a5 | 42 | extern int am_generator; |
3ea6e0e7 | 43 | extern int inc_recurse; |
8ef246e0 | 44 | extern int io_error; |
e626b29e | 45 | extern int eol_nulls; |
8ef246e0 | 46 | extern int flist_eof; |
7f9bf6b7 | 47 | extern int list_only; |
3b0a30eb | 48 | extern int read_batch; |
ba525f77 | 49 | extern int protect_args; |
b9f592fb WD |
50 | extern int checksum_seed; |
51 | extern int protocol_version; | |
47c11975 | 52 | extern int remove_source_files; |
cdf236aa | 53 | extern int preserve_hard_links; |
a800434a | 54 | extern struct stats stats; |
19531e1f | 55 | extern struct file_list *cur_flist; |
332cf6df | 56 | #ifdef ICONV_OPTION |
ba525f77 | 57 | extern int filesfrom_convert; |
332cf6df WD |
58 | extern iconv_t ic_send, ic_recv; |
59 | #endif | |
720b47f2 | 60 | |
93465f51 WD |
61 | int csum_length = SHORT_SUM_LENGTH; /* initial value */ |
62 | int allowed_lull = 0; | |
9e2409ab | 63 | int ignore_timeout = 0; |
b9f592fb | 64 | int batch_fd = -1; |
04c722d5 | 65 | int msgdone_cnt = 0; |
805edf9d | 66 | |
cb2e1f18 | 67 | /* Ignore an EOF error if non-zero. See whine_about_eof(). */ |
574c2500 | 68 | int kluge_around_eof = 0; |
7a55d06e | 69 | |
d17e1dd2 WD |
70 | int msg_fd_in = -1; |
71 | int msg_fd_out = -1; | |
cdf236aa WD |
72 | int sock_f_in = -1; |
73 | int sock_f_out = -1; | |
7a55d06e | 74 | |
8ef246e0 WD |
75 | static int iobuf_f_in = -1; |
76 | static char *iobuf_in; | |
77 | static size_t iobuf_in_siz; | |
78 | static size_t iobuf_in_ndx; | |
79 | static size_t iobuf_in_remaining; | |
80 | ||
81 | static int iobuf_f_out = -1; | |
82 | static char *iobuf_out; | |
83 | static int iobuf_out_cnt; | |
84 | ||
85 | int flist_forward_from = -1; | |
86 | ||
1f75bb10 WD |
87 | static int io_multiplexing_out; |
88 | static int io_multiplexing_in; | |
3b0a30eb WD |
89 | static time_t last_io_in; |
90 | static time_t last_io_out; | |
1f75bb10 WD |
91 | static int no_flush; |
92 | ||
b9f592fb WD |
93 | static int write_batch_monitor_in = -1; |
94 | static int write_batch_monitor_out = -1; | |
95 | ||
56014c8c WD |
96 | static int io_filesfrom_f_in = -1; |
97 | static int io_filesfrom_f_out = -1; | |
ba525f77 WD |
98 | static xbuf ff_buf = EMPTY_XBUF; |
99 | static char ff_lastchar; | |
332cf6df | 100 | #ifdef ICONV_OPTION |
ba525f77 | 101 | static xbuf iconv_buf = EMPTY_XBUF; |
332cf6df | 102 | #endif |
17a4977b | 103 | static int defer_forwarding_messages = 0, defer_forwarding_keep = 0; |
3b0a30eb | 104 | static int select_timeout = SELECT_TIMEOUT; |
d6081c82 WD |
105 | static int active_filecnt = 0; |
106 | static OFF_T active_bytecnt = 0; | |
7f9bf6b7 | 107 | static int first_message = 1; |
720b47f2 | 108 | |
351e23ad WD |
109 | static char int_byte_extra[64] = { |
110 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (00 - 3F)/4 */ | |
111 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (40 - 7F)/4 */ | |
112 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* (80 - BF)/4 */ | |
113 | 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 5, 6, /* (C0 - FF)/4 */ | |
482f48cc WD |
114 | }; |
115 | ||
7f9bf6b7 WD |
116 | #define REMOTE_OPTION_ERROR "rsync: on remote machine: -" |
117 | #define REMOTE_OPTION_ERROR2 ": unknown option" | |
118 | ||
29349024 WD |
119 | enum festatus { FES_SUCCESS, FES_REDO, FES_NO_SEND }; |
120 | ||
dde5b772 | 121 | static void readfd(int fd, char *buffer, size_t N); |
8ef246e0 WD |
122 | static void writefd(int fd, const char *buf, size_t len); |
123 | static void writefd_unbuffered(int fd, const char *buf, size_t len); | |
332cf6df | 124 | static void mplex_write(int fd, enum msgcode code, const char *buf, size_t len, int convert); |
ff41a59f | 125 | |
c6816b94 WD |
126 | struct flist_ndx_item { |
127 | struct flist_ndx_item *next; | |
128 | int ndx; | |
d17e1dd2 WD |
129 | }; |
130 | ||
c6816b94 WD |
131 | struct flist_ndx_list { |
132 | struct flist_ndx_item *head, *tail; | |
133 | }; | |
134 | ||
cdf236aa | 135 | static struct flist_ndx_list redo_list, hlink_list; |
d17e1dd2 | 136 | |
08c88178 WD |
137 | struct msg_list_item { |
138 | struct msg_list_item *next; | |
332cf6df | 139 | char convert; |
954bbed8 | 140 | char buf[1]; |
d17e1dd2 WD |
141 | }; |
142 | ||
08c88178 WD |
143 | struct msg_list { |
144 | struct msg_list_item *head, *tail; | |
145 | }; | |
146 | ||
e4c877cf | 147 | static struct msg_list msg_queue; |
d17e1dd2 | 148 | |
c6816b94 | 149 | static void flist_ndx_push(struct flist_ndx_list *lp, int ndx) |
d17e1dd2 | 150 | { |
c6816b94 WD |
151 | struct flist_ndx_item *item; |
152 | ||
153 | if (!(item = new(struct flist_ndx_item))) | |
154 | out_of_memory("flist_ndx_push"); | |
155 | item->next = NULL; | |
156 | item->ndx = ndx; | |
157 | if (lp->tail) | |
158 | lp->tail->next = item; | |
d17e1dd2 | 159 | else |
c6816b94 WD |
160 | lp->head = item; |
161 | lp->tail = item; | |
162 | } | |
163 | ||
164 | static int flist_ndx_pop(struct flist_ndx_list *lp) | |
165 | { | |
166 | struct flist_ndx_item *next; | |
167 | int ndx; | |
168 | ||
169 | if (!lp->head) | |
170 | return -1; | |
171 | ||
172 | ndx = lp->head->ndx; | |
173 | next = lp->head->next; | |
174 | free(lp->head); | |
175 | lp->head = next; | |
176 | if (!next) | |
177 | lp->tail = NULL; | |
178 | ||
179 | return ndx; | |
d17e1dd2 WD |
180 | } |
181 | ||
29349024 WD |
182 | static void got_flist_entry_status(enum festatus status, const char *buf) |
183 | { | |
184 | int ndx = IVAL(buf, 0); | |
185 | struct file_list *flist = flist_for_ndx(ndx); | |
186 | ||
187 | assert(flist != NULL); | |
29349024 WD |
188 | |
189 | if (remove_source_files) { | |
190 | active_filecnt--; | |
191 | active_bytecnt -= F_LENGTH(flist->files[ndx - flist->ndx_start]); | |
192 | } | |
193 | ||
194 | if (inc_recurse) | |
195 | flist->in_progress--; | |
196 | ||
197 | switch (status) { | |
198 | case FES_SUCCESS: | |
199 | if (remove_source_files) | |
200 | send_msg(MSG_SUCCESS, buf, 4, 0); | |
201 | if (preserve_hard_links) { | |
202 | struct file_struct *file = flist->files[ndx - flist->ndx_start]; | |
37ce1679 | 203 | if (F_IS_HLINKED(file)) { |
29349024 | 204 | flist_ndx_push(&hlink_list, ndx); |
37ce1679 WD |
205 | flist->in_progress++; |
206 | } | |
29349024 WD |
207 | } |
208 | break; | |
209 | case FES_REDO: | |
210 | if (inc_recurse) | |
211 | flist->to_redo++; | |
212 | flist_ndx_push(&redo_list, ndx); | |
213 | break; | |
214 | case FES_NO_SEND: | |
215 | break; | |
216 | } | |
217 | } | |
218 | ||
8d9dc9f9 AT |
219 | static void check_timeout(void) |
220 | { | |
221 | time_t t; | |
90ba34e2 | 222 | |
9e2409ab | 223 | if (!io_timeout || ignore_timeout) |
d17e1dd2 | 224 | return; |
8d9dc9f9 | 225 | |
3b0a30eb WD |
226 | if (!last_io_in) { |
227 | last_io_in = time(NULL); | |
8d9dc9f9 AT |
228 | return; |
229 | } | |
230 | ||
231 | t = time(NULL); | |
232 | ||
3b0a30eb | 233 | if (t - last_io_in >= io_timeout) { |
0adb99b9 | 234 | if (!am_server && !am_daemon) { |
4ccfd96c | 235 | rprintf(FERROR, "io timeout after %d seconds -- exiting\n", |
3b0a30eb | 236 | (int)(t-last_io_in)); |
0adb99b9 | 237 | } |
65417579 | 238 | exit_cleanup(RERR_TIMEOUT); |
8d9dc9f9 AT |
239 | } |
240 | } | |
241 | ||
1f75bb10 WD |
242 | /* Note the fds used for the main socket (which might really be a pipe |
243 | * for a local transfer, but we can ignore that). */ | |
244 | void io_set_sock_fds(int f_in, int f_out) | |
245 | { | |
246 | sock_f_in = f_in; | |
247 | sock_f_out = f_out; | |
248 | } | |
249 | ||
3b0a30eb WD |
250 | void set_io_timeout(int secs) |
251 | { | |
252 | io_timeout = secs; | |
253 | ||
254 | if (!io_timeout || io_timeout > SELECT_TIMEOUT) | |
255 | select_timeout = SELECT_TIMEOUT; | |
256 | else | |
257 | select_timeout = io_timeout; | |
258 | ||
259 | allowed_lull = read_batch ? 0 : (io_timeout + 1) / 2; | |
260 | } | |
261 | ||
98f8c9a5 WD |
262 | /* Setup the fd used to receive MSG_* messages. Only needed during the |
263 | * early stages of being a local sender (up through the sending of the | |
264 | * file list) or when we're the generator (to fetch the messages from | |
265 | * the receiver). */ | |
d17e1dd2 WD |
266 | void set_msg_fd_in(int fd) |
267 | { | |
268 | msg_fd_in = fd; | |
269 | } | |
270 | ||
98f8c9a5 WD |
271 | /* Setup the fd used to send our MSG_* messages. Only needed when |
272 | * we're the receiver (to send our messages to the generator). */ | |
d17e1dd2 WD |
273 | void set_msg_fd_out(int fd) |
274 | { | |
275 | msg_fd_out = fd; | |
276 | set_nonblocking(msg_fd_out); | |
277 | } | |
278 | ||
279 | /* Add a message to the pending MSG_* list. */ | |
332cf6df | 280 | static void msg_list_add(struct msg_list *lst, int code, const char *buf, int len, int convert) |
554e0a8d | 281 | { |
954bbed8 WD |
282 | struct msg_list_item *m; |
283 | int sz = len + 4 + sizeof m[0] - 1; | |
d17e1dd2 | 284 | |
954bbed8 | 285 | if (!(m = (struct msg_list_item *)new_array(char, sz))) |
c6816b94 | 286 | out_of_memory("msg_list_add"); |
954bbed8 | 287 | m->next = NULL; |
332cf6df | 288 | m->convert = convert; |
954bbed8 WD |
289 | SIVAL(m->buf, 0, ((code+MPLEX_BASE)<<24) | len); |
290 | memcpy(m->buf + 4, buf, len); | |
291 | if (lst->tail) | |
292 | lst->tail->next = m; | |
d17e1dd2 | 293 | else |
954bbed8 WD |
294 | lst->head = m; |
295 | lst->tail = m; | |
554e0a8d AT |
296 | } |
297 | ||
e4c877cf | 298 | static void msg_flush(void) |
3be97bf9 | 299 | { |
e4c877cf WD |
300 | if (am_generator) { |
301 | while (msg_queue.head && io_multiplexing_out) { | |
302 | struct msg_list_item *m = msg_queue.head; | |
332cf6df WD |
303 | int len = IVAL(m->buf, 0) & 0xFFFFFF; |
304 | int tag = *((uchar*)m->buf+3) - MPLEX_BASE; | |
e4c877cf WD |
305 | if (!(msg_queue.head = m->next)) |
306 | msg_queue.tail = NULL; | |
332cf6df | 307 | stats.total_written += len + 4; |
e4c877cf | 308 | defer_forwarding_messages++; |
332cf6df | 309 | mplex_write(sock_f_out, tag, m->buf + 4, len, m->convert); |
e4c877cf WD |
310 | defer_forwarding_messages--; |
311 | free(m); | |
312 | } | |
313 | } else { | |
314 | while (msg_queue.head) { | |
315 | struct msg_list_item *m = msg_queue.head; | |
332cf6df WD |
316 | int len = IVAL(m->buf, 0) & 0xFFFFFF; |
317 | int tag = *((uchar*)m->buf+3) - MPLEX_BASE; | |
e4c877cf WD |
318 | if (!(msg_queue.head = m->next)) |
319 | msg_queue.tail = NULL; | |
320 | defer_forwarding_messages++; | |
332cf6df | 321 | mplex_write(msg_fd_out, tag, m->buf + 4, len, m->convert); |
e4c877cf WD |
322 | defer_forwarding_messages--; |
323 | free(m); | |
324 | } | |
3be97bf9 WD |
325 | } |
326 | } | |
327 | ||
7f9bf6b7 WD |
328 | static void check_for_d_option_error(const char *msg) |
329 | { | |
330 | static char rsync263_opts[] = "BCDHIKLPRSTWabceghlnopqrtuvxz"; | |
331 | char *colon; | |
332 | int saw_d = 0; | |
333 | ||
334 | if (*msg != 'r' | |
335 | || strncmp(msg, REMOTE_OPTION_ERROR, sizeof REMOTE_OPTION_ERROR - 1) != 0) | |
336 | return; | |
337 | ||
338 | msg += sizeof REMOTE_OPTION_ERROR - 1; | |
339 | if (*msg == '-' || (colon = strchr(msg, ':')) == NULL | |
340 | || strncmp(colon, REMOTE_OPTION_ERROR2, sizeof REMOTE_OPTION_ERROR2 - 1) != 0) | |
341 | return; | |
342 | ||
343 | for ( ; *msg != ':'; msg++) { | |
344 | if (*msg == 'd') | |
345 | saw_d = 1; | |
346 | else if (*msg == 'e') | |
347 | break; | |
348 | else if (strchr(rsync263_opts, *msg) == NULL) | |
349 | return; | |
350 | } | |
351 | ||
352 | if (saw_d) { | |
353 | rprintf(FWARNING, | |
73cb6738 | 354 | "*** Try using \"--old-d\" if remote rsync is <= 2.6.3 ***\n"); |
7f9bf6b7 WD |
355 | } |
356 | } | |
357 | ||
98f8c9a5 WD |
358 | /* Read a message from the MSG_* fd and handle it. This is called either |
359 | * during the early stages of being a local sender (up through the sending | |
360 | * of the file list) or when we're the generator (to fetch the messages | |
361 | * from the receiver). */ | |
d17e1dd2 | 362 | static void read_msg_fd(void) |
554e0a8d | 363 | { |
f9c6b3e7 | 364 | char buf[2048]; |
06ce139f | 365 | size_t n; |
8ef246e0 | 366 | struct file_list *flist; |
d17e1dd2 | 367 | int fd = msg_fd_in; |
ff41a59f AT |
368 | int tag, len; |
369 | ||
00bdf899 | 370 | /* Temporarily disable msg_fd_in. This is needed to avoid looping back |
af436313 | 371 | * to this routine from writefd_unbuffered(). */ |
3be97bf9 | 372 | no_flush++; |
d17e1dd2 | 373 | msg_fd_in = -1; |
be21e29c | 374 | defer_forwarding_messages++; |
554e0a8d | 375 | |
dde5b772 | 376 | readfd(fd, buf, 4); |
ff41a59f AT |
377 | tag = IVAL(buf, 0); |
378 | ||
379 | len = tag & 0xFFFFFF; | |
d17e1dd2 | 380 | tag = (tag >> 24) - MPLEX_BASE; |
ff41a59f | 381 | |
d17e1dd2 WD |
382 | switch (tag) { |
383 | case MSG_DONE: | |
cc7b86bf | 384 | if (len < 0 || len > 1 || !am_generator) { |
8ef246e0 WD |
385 | invalid_msg: |
386 | rprintf(FERROR, "invalid message %d:%d [%s%s]\n", | |
387 | tag, len, who_am_i(), | |
3ea6e0e7 | 388 | inc_recurse ? "/inc" : ""); |
d17e1dd2 | 389 | exit_cleanup(RERR_STREAMIO); |
13c7bcbb | 390 | } |
cc7b86bf WD |
391 | if (len) { |
392 | readfd(fd, buf, len); | |
351e23ad | 393 | stats.total_read = read_varlong(fd, 3); |
cc7b86bf | 394 | } |
04c722d5 | 395 | msgdone_cnt++; |
d17e1dd2 WD |
396 | break; |
397 | case MSG_REDO: | |
8ef246e0 WD |
398 | if (len != 4 || !am_generator) |
399 | goto invalid_msg; | |
dde5b772 | 400 | readfd(fd, buf, 4); |
29349024 | 401 | got_flist_entry_status(FES_REDO, buf); |
8ef246e0 WD |
402 | break; |
403 | case MSG_FLIST: | |
3ea6e0e7 | 404 | if (len != 4 || !am_generator || !inc_recurse) |
8ef246e0 | 405 | goto invalid_msg; |
dde5b772 | 406 | readfd(fd, buf, 4); |
8ef246e0 WD |
407 | /* Read extra file list from receiver. */ |
408 | assert(iobuf_in != NULL); | |
409 | assert(iobuf_f_in == fd); | |
951e826b | 410 | if (DEBUG_GTE(FLIST, 2)) { |
1faa1a6d WD |
411 | rprintf(FINFO, "[%s] receiving flist for dir %d\n", |
412 | who_am_i(), IVAL(buf,0)); | |
413 | } | |
8ef246e0 WD |
414 | flist = recv_file_list(fd); |
415 | flist->parent_ndx = IVAL(buf,0); | |
da131912 WD |
416 | #ifdef SUPPORT_HARD_LINKS |
417 | if (preserve_hard_links) | |
418 | match_hard_links(flist); | |
419 | #endif | |
8ef246e0 WD |
420 | break; |
421 | case MSG_FLIST_EOF: | |
3ea6e0e7 | 422 | if (len != 0 || !am_generator || !inc_recurse) |
8ef246e0 WD |
423 | goto invalid_msg; |
424 | flist_eof = 1; | |
d17e1dd2 | 425 | break; |
e5f35681 WD |
426 | case MSG_IO_ERROR: |
427 | if (len != 4) | |
428 | goto invalid_msg; | |
429 | readfd(fd, buf, len); | |
430 | io_error |= IVAL(buf, 0); | |
431 | break; | |
0d67e00a | 432 | case MSG_DELETED: |
8ef246e0 WD |
433 | if (len >= (int)sizeof buf || !am_generator) |
434 | goto invalid_msg; | |
dde5b772 | 435 | readfd(fd, buf, len); |
332cf6df | 436 | send_msg(MSG_DELETED, buf, len, 1); |
0d67e00a | 437 | break; |
9981c27e | 438 | case MSG_SUCCESS: |
8ef246e0 WD |
439 | if (len != 4 || !am_generator) |
440 | goto invalid_msg; | |
29349024 WD |
441 | readfd(fd, buf, 4); |
442 | got_flist_entry_status(FES_SUCCESS, buf); | |
8ef246e0 WD |
443 | break; |
444 | case MSG_NO_SEND: | |
445 | if (len != 4 || !am_generator) | |
446 | goto invalid_msg; | |
29349024 WD |
447 | readfd(fd, buf, 4); |
448 | got_flist_entry_status(FES_NO_SEND, buf); | |
9981c27e | 449 | break; |
3f0211b6 | 450 | case MSG_ERROR_SOCKET: |
64119c79 | 451 | case MSG_CLIENT: |
8ef246e0 WD |
452 | if (!am_generator) |
453 | goto invalid_msg; | |
3f0211b6 | 454 | if (tag == MSG_ERROR_SOCKET) |
8ef246e0 | 455 | io_end_multiplex_out(); |
72f2d1b3 | 456 | /* FALL THROUGH */ |
d17e1dd2 WD |
457 | case MSG_INFO: |
458 | case MSG_ERROR: | |
3f0211b6 WD |
459 | case MSG_ERROR_XFER: |
460 | case MSG_WARNING: | |
d17e1dd2 WD |
461 | case MSG_LOG: |
462 | while (len) { | |
463 | n = len; | |
464 | if (n >= sizeof buf) | |
465 | n = sizeof buf - 1; | |
dde5b772 | 466 | readfd(fd, buf, n); |
332cf6df | 467 | rwrite((enum logcode)tag, buf, n, !am_generator); |
d17e1dd2 WD |
468 | len -= n; |
469 | } | |
470 | break; | |
471 | default: | |
f8b9da1a WD |
472 | rprintf(FERROR, "unknown message %d:%d [%s]\n", |
473 | tag, len, who_am_i()); | |
d17e1dd2 WD |
474 | exit_cleanup(RERR_STREAMIO); |
475 | } | |
476 | ||
3be97bf9 | 477 | no_flush--; |
d17e1dd2 | 478 | msg_fd_in = fd; |
17a4977b | 479 | if (!--defer_forwarding_messages && !no_flush) |
e4c877cf | 480 | msg_flush(); |
d17e1dd2 WD |
481 | } |
482 | ||
d6081c82 | 483 | /* This is used by the generator to limit how many file transfers can |
47c11975 | 484 | * be active at once when --remove-source-files is specified. Without |
d6081c82 WD |
485 | * this, sender-side deletions were mostly happening at the end. */ |
486 | void increment_active_files(int ndx, int itemizing, enum logcode code) | |
487 | { | |
488 | /* TODO: tune these limits? */ | |
5b986297 | 489 | while (active_filecnt >= (active_bytecnt >= 128*1024 ? 10 : 50)) { |
04c722d5 WD |
490 | check_for_finished_files(itemizing, code, 0); |
491 | if (iobuf_out_cnt) | |
492 | io_flush(NORMAL_FLUSH); | |
493 | else | |
494 | read_msg_fd(); | |
d6081c82 WD |
495 | } |
496 | ||
497 | active_filecnt++; | |
121bfb2b | 498 | active_bytecnt += F_LENGTH(cur_flist->files[ndx - cur_flist->ndx_start]); |
d6081c82 WD |
499 | } |
500 | ||
3be97bf9 | 501 | /* Write an message to a multiplexed stream. If this fails, rsync exits. */ |
332cf6df | 502 | static void mplex_write(int fd, enum msgcode code, const char *buf, size_t len, int convert) |
d17e1dd2 | 503 | { |
332cf6df | 504 | char buffer[BIGPATHBUFLEN]; /* Oversized for use by iconv code. */ |
3be97bf9 | 505 | size_t n = len; |
d17e1dd2 | 506 | |
332cf6df | 507 | #ifdef ICONV_OPTION |
ee6e80c7 WD |
508 | /* We need to convert buf before doing anything else so that we |
509 | * can include the (converted) byte length in the message header. */ | |
510 | if (convert && ic_send != (iconv_t)-1) { | |
511 | xbuf outbuf, inbuf; | |
512 | ||
513 | INIT_XBUF(outbuf, buffer + 4, 0, sizeof buffer - 4); | |
bb640d32 | 514 | INIT_XBUF(inbuf, (char*)buf, len, (size_t)-1); |
332cf6df | 515 | |
ee6e80c7 WD |
516 | iconvbufs(ic_send, &inbuf, &outbuf, |
517 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE); | |
518 | if (inbuf.len > 0) { | |
519 | rprintf(FERROR, "overflowed conversion buffer in mplex_write"); | |
520 | exit_cleanup(RERR_UNSUPPORTED); | |
521 | } | |
522 | ||
523 | n = len = outbuf.len; | |
524 | } else | |
525 | #endif | |
526 | if (n > 1024 - 4) /* BIGPATHBUFLEN can handle 1024 bytes */ | |
527 | n = 0; /* We'd rather do 2 writes than too much memcpy(). */ | |
3be97bf9 WD |
528 | else |
529 | memcpy(buffer + 4, buf, n); | |
530 | ||
ee6e80c7 WD |
531 | SIVAL(buffer, 0, ((MPLEX_BASE + (int)code)<<24) + len); |
532 | ||
17a4977b | 533 | defer_forwarding_keep = 1; /* defer_forwarding_messages++ on return */ |
3be97bf9 | 534 | writefd_unbuffered(fd, buffer, n+4); |
17a4977b | 535 | defer_forwarding_keep = 0; |
3be97bf9 | 536 | |
ee6e80c7 WD |
537 | if (len > n) |
538 | writefd_unbuffered(fd, buf+n, len-n); | |
17a4977b WD |
539 | |
540 | if (!--defer_forwarding_messages && !no_flush) | |
541 | msg_flush(); | |
d17e1dd2 WD |
542 | } |
543 | ||
332cf6df | 544 | int send_msg(enum msgcode code, const char *buf, int len, int convert) |
37f35d89 WD |
545 | { |
546 | if (msg_fd_out < 0) { | |
12ccc73a | 547 | if (!defer_forwarding_messages) |
332cf6df | 548 | return io_multiplex_write(code, buf, len, convert); |
12ccc73a WD |
549 | if (!io_multiplexing_out) |
550 | return 0; | |
332cf6df | 551 | msg_list_add(&msg_queue, code, buf, len, convert); |
12ccc73a | 552 | return 1; |
37f35d89 | 553 | } |
e4c877cf | 554 | if (flist_forward_from >= 0) |
332cf6df | 555 | msg_list_add(&msg_queue, code, buf, len, convert); |
e4c877cf | 556 | else |
332cf6df | 557 | mplex_write(msg_fd_out, code, buf, len, convert); |
12ccc73a | 558 | return 1; |
37f35d89 WD |
559 | } |
560 | ||
155d9206 WD |
561 | void send_msg_int(enum msgcode code, int num) |
562 | { | |
563 | char numbuf[4]; | |
564 | SIVAL(numbuf, 0, num); | |
332cf6df | 565 | send_msg(code, numbuf, 4, 0); |
155d9206 WD |
566 | } |
567 | ||
8ef246e0 | 568 | void wait_for_receiver(void) |
d17e1dd2 | 569 | { |
2a5df862 WD |
570 | if (iobuf_out_cnt) |
571 | io_flush(NORMAL_FLUSH); | |
572 | else | |
573 | read_msg_fd(); | |
8ef246e0 | 574 | } |
554e0a8d | 575 | |
8ef246e0 WD |
576 | int get_redo_num(void) |
577 | { | |
c6816b94 | 578 | return flist_ndx_pop(&redo_list); |
554e0a8d AT |
579 | } |
580 | ||
cdf236aa WD |
581 | int get_hlink_num(void) |
582 | { | |
583 | return flist_ndx_pop(&hlink_list); | |
584 | } | |
585 | ||
56014c8c WD |
586 | /** |
587 | * When we're the receiver and we have a local --files-from list of names | |
588 | * that needs to be sent over the socket to the sender, we have to do two | |
589 | * things at the same time: send the sender a list of what files we're | |
590 | * processing and read the incoming file+info list from the sender. We do | |
591 | * this by augmenting the read_timeout() function to copy this data. It | |
ba525f77 WD |
592 | * uses ff_buf to read a block of data from f_in (when it is ready, since |
593 | * it might be a pipe) and then blast it out f_out (when it is ready to | |
594 | * receive more data). | |
56014c8c WD |
595 | */ |
596 | void io_set_filesfrom_fds(int f_in, int f_out) | |
597 | { | |
598 | io_filesfrom_f_in = f_in; | |
599 | io_filesfrom_f_out = f_out; | |
ba525f77 WD |
600 | alloc_xbuf(&ff_buf, 2048); |
601 | #ifdef ICONV_OPTION | |
602 | if (protect_args) | |
603 | alloc_xbuf(&iconv_buf, 1024); | |
604 | #endif | |
56014c8c | 605 | } |
720b47f2 | 606 | |
cb2e1f18 WD |
607 | /* It's almost always an error to get an EOF when we're trying to read from the |
608 | * network, because the protocol is (for the most part) self-terminating. | |
880da007 | 609 | * |
cb2e1f18 WD |
610 | * There is one case for the receiver when it is at the end of the transfer |
611 | * (hanging around reading any keep-alive packets that might come its way): if | |
612 | * the sender dies before the generator's kill-signal comes through, we can end | |
613 | * up here needing to loop until the kill-signal arrives. In this situation, | |
614 | * kluge_around_eof will be < 0. | |
615 | * | |
616 | * There is another case for older protocol versions (< 24) where the module | |
617 | * listing was not terminated, so we must ignore an EOF error in that case and | |
618 | * exit. In this situation, kluge_around_eof will be > 0. */ | |
1f75bb10 | 619 | static void whine_about_eof(int fd) |
7a55d06e | 620 | { |
574c2500 | 621 | if (kluge_around_eof && fd == sock_f_in) { |
55bb7fff | 622 | int i; |
574c2500 WD |
623 | if (kluge_around_eof > 0) |
624 | exit_cleanup(0); | |
55bb7fff WD |
625 | /* If we're still here after 10 seconds, exit with an error. */ |
626 | for (i = 10*1000/20; i--; ) | |
574c2500 WD |
627 | msleep(20); |
628 | } | |
3151cbae | 629 | |
00bdf899 | 630 | rprintf(FERROR, RSYNC_NAME ": connection unexpectedly closed " |
6d56efa6 WD |
631 | "(%s bytes received so far) [%s]\n", |
632 | big_num(stats.total_read, 0), who_am_i()); | |
00bdf899 WD |
633 | |
634 | exit_cleanup(RERR_STREAMIO); | |
7a55d06e | 635 | } |
720b47f2 | 636 | |
880da007 | 637 | /** |
6ed6d7f5 | 638 | * Read from a socket with I/O timeout. return the number of bytes |
c3563c46 MP |
639 | * read. If no bytes can be read then exit, never return a number <= 0. |
640 | * | |
8886f8d0 MP |
641 | * TODO: If the remote shell connection fails, then current versions |
642 | * actually report an "unexpected EOF" error here. Since it's a | |
643 | * fairly common mistake to try to use rsh when ssh is required, we | |
644 | * should trap that: if we fail to read any data at all, we should | |
645 | * give a better explanation. We can tell whether the connection has | |
646 | * started by looking e.g. at whether the remote version is known yet. | |
c3563c46 | 647 | */ |
3151cbae | 648 | static int read_timeout(int fd, char *buf, size_t len) |
8d9dc9f9 | 649 | { |
d8aeda1e | 650 | int n, cnt = 0; |
4c36ddbe | 651 | |
dde5b772 | 652 | io_flush(FULL_FLUSH); |
ea2111d1 | 653 | |
d8aeda1e | 654 | while (cnt == 0) { |
7a55d06e | 655 | /* until we manage to read *something* */ |
56014c8c | 656 | fd_set r_fds, w_fds; |
4c36ddbe | 657 | struct timeval tv; |
1ea087a7 | 658 | int maxfd = fd; |
a57873b7 | 659 | int count; |
4c36ddbe | 660 | |
56014c8c | 661 | FD_ZERO(&r_fds); |
a7026ba9 | 662 | FD_ZERO(&w_fds); |
56014c8c | 663 | FD_SET(fd, &r_fds); |
3309507d | 664 | if (io_filesfrom_f_out >= 0) { |
56014c8c | 665 | int new_fd; |
ba525f77 | 666 | if (ff_buf.len == 0) { |
3309507d | 667 | if (io_filesfrom_f_in >= 0) { |
56014c8c WD |
668 | FD_SET(io_filesfrom_f_in, &r_fds); |
669 | new_fd = io_filesfrom_f_in; | |
670 | } else { | |
671 | io_filesfrom_f_out = -1; | |
672 | new_fd = -1; | |
673 | } | |
674 | } else { | |
56014c8c WD |
675 | FD_SET(io_filesfrom_f_out, &w_fds); |
676 | new_fd = io_filesfrom_f_out; | |
677 | } | |
1ea087a7 WD |
678 | if (new_fd > maxfd) |
679 | maxfd = new_fd; | |
554e0a8d AT |
680 | } |
681 | ||
e626b29e | 682 | tv.tv_sec = select_timeout; |
4c36ddbe AT |
683 | tv.tv_usec = 0; |
684 | ||
554e0a8d AT |
685 | errno = 0; |
686 | ||
a7026ba9 | 687 | count = select(maxfd + 1, &r_fds, &w_fds, NULL, &tv); |
a57873b7 | 688 | |
a57873b7 | 689 | if (count <= 0) { |
2a5df862 WD |
690 | if (errno == EBADF) { |
691 | defer_forwarding_messages = 0; | |
554e0a8d | 692 | exit_cleanup(RERR_SOCKETIO); |
2a5df862 | 693 | } |
bd717af8 | 694 | check_timeout(); |
4c36ddbe AT |
695 | continue; |
696 | } | |
697 | ||
3309507d | 698 | if (io_filesfrom_f_out >= 0) { |
ba525f77 | 699 | if (ff_buf.len) { |
56014c8c WD |
700 | if (FD_ISSET(io_filesfrom_f_out, &w_fds)) { |
701 | int l = write(io_filesfrom_f_out, | |
ba525f77 WD |
702 | ff_buf.buf + ff_buf.pos, |
703 | ff_buf.len); | |
56014c8c | 704 | if (l > 0) { |
ba525f77 WD |
705 | if (!(ff_buf.len -= l)) |
706 | ff_buf.pos = 0; | |
56014c8c | 707 | else |
ba525f77 | 708 | ff_buf.pos += l; |
47cffb77 | 709 | } else if (errno != EINTR) { |
56014c8c WD |
710 | /* XXX should we complain? */ |
711 | io_filesfrom_f_out = -1; | |
712 | } | |
713 | } | |
3309507d | 714 | } else if (io_filesfrom_f_in >= 0) { |
56014c8c | 715 | if (FD_ISSET(io_filesfrom_f_in, &r_fds)) { |
22955408 | 716 | #ifdef ICONV_OPTION |
ba525f77 | 717 | xbuf *ibuf = filesfrom_convert ? &iconv_buf : &ff_buf; |
22955408 WD |
718 | #else |
719 | xbuf *ibuf = &ff_buf; | |
720 | #endif | |
ba525f77 | 721 | int l = read(io_filesfrom_f_in, ibuf->buf, ibuf->size); |
56014c8c | 722 | if (l <= 0) { |
47cffb77 WD |
723 | if (l == 0 || errno != EINTR) { |
724 | /* Send end-of-file marker */ | |
ba525f77 WD |
725 | memcpy(ff_buf.buf, "\0\0", 2); |
726 | ff_buf.len = ff_lastchar? 2 : 1; | |
727 | ff_buf.pos = 0; | |
47cffb77 WD |
728 | io_filesfrom_f_in = -1; |
729 | } | |
56014c8c | 730 | } else { |
22955408 | 731 | #ifdef ICONV_OPTION |
ba525f77 WD |
732 | if (filesfrom_convert) { |
733 | iconv_buf.pos = 0; | |
734 | iconv_buf.len = l; | |
735 | iconvbufs(ic_send, &iconv_buf, &ff_buf, | |
736 | ICB_EXPAND_OUT|ICB_INCLUDE_BAD|ICB_INCLUDE_INCOMPLETE); | |
737 | l = ff_buf.len; | |
738 | } | |
22955408 | 739 | #endif |
56014c8c | 740 | if (!eol_nulls) { |
ba525f77 | 741 | char *s = ff_buf.buf + l; |
56014c8c | 742 | /* Transform CR and/or LF into '\0' */ |
ba525f77 | 743 | while (s-- > ff_buf.buf) { |
56014c8c WD |
744 | if (*s == '\n' || *s == '\r') |
745 | *s = '\0'; | |
746 | } | |
747 | } | |
ba525f77 | 748 | if (!ff_lastchar) { |
56014c8c WD |
749 | /* Last buf ended with a '\0', so don't |
750 | * let this buf start with one. */ | |
ba525f77 WD |
751 | while (l && ff_buf.buf[ff_buf.pos] == '\0') |
752 | ff_buf.pos++, l--; | |
56014c8c WD |
753 | } |
754 | if (!l) | |
ba525f77 | 755 | ff_buf.pos = 0; |
56014c8c | 756 | else { |
ba525f77 | 757 | char *f = ff_buf.buf + ff_buf.pos; |
56014c8c WD |
758 | char *t = f; |
759 | char *eob = f + l; | |
760 | /* Eliminate any multi-'\0' runs. */ | |
761 | while (f != eob) { | |
762 | if (!(*t++ = *f++)) { | |
763 | while (f != eob && !*f) | |
764 | f++, l--; | |
765 | } | |
766 | } | |
ba525f77 | 767 | ff_lastchar = f[-1]; |
56014c8c | 768 | } |
ba525f77 | 769 | ff_buf.len = l; |
56014c8c WD |
770 | } |
771 | } | |
772 | } | |
773 | } | |
774 | ||
f89b9368 WD |
775 | if (!FD_ISSET(fd, &r_fds)) |
776 | continue; | |
554e0a8d | 777 | |
4c36ddbe AT |
778 | n = read(fd, buf, len); |
779 | ||
1ea087a7 WD |
780 | if (n <= 0) { |
781 | if (n == 0) | |
1f75bb10 | 782 | whine_about_eof(fd); /* Doesn't return. */ |
d62bcc17 WD |
783 | if (errno == EINTR || errno == EWOULDBLOCK |
784 | || errno == EAGAIN) | |
7a55d06e | 785 | continue; |
1f75bb10 WD |
786 | |
787 | /* Don't write errors on a dead socket. */ | |
72f2d1b3 | 788 | if (fd == sock_f_in) { |
8ef246e0 | 789 | io_end_multiplex_out(); |
3f0211b6 | 790 | rsyserr(FERROR_SOCKET, errno, "read error"); |
72f2d1b3 WD |
791 | } else |
792 | rsyserr(FERROR, errno, "read error"); | |
1f75bb10 | 793 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 | 794 | } |
00bdf899 WD |
795 | |
796 | buf += n; | |
797 | len -= n; | |
d8aeda1e | 798 | cnt += n; |
1f75bb10 | 799 | |
3b0a30eb WD |
800 | if (fd == sock_f_in && io_timeout) |
801 | last_io_in = time(NULL); | |
4c36ddbe | 802 | } |
8d9dc9f9 | 803 | |
d8aeda1e | 804 | return cnt; |
4c36ddbe | 805 | } |
8d9dc9f9 | 806 | |
67b8f3df | 807 | /* Read a line into the "buf" buffer. */ |
ba525f77 | 808 | int read_line(int fd, char *buf, size_t bufsiz, int flags) |
56014c8c | 809 | { |
ba525f77 | 810 | char ch, *s, *eob; |
56014c8c | 811 | int cnt; |
56014c8c | 812 | |
ba525f77 WD |
813 | #ifdef ICONV_OPTION |
814 | if (flags & RL_CONVERT && iconv_buf.size < bufsiz) | |
815 | realloc_xbuf(&iconv_buf, bufsiz + 1024); | |
816 | #endif | |
817 | ||
56014c8c | 818 | start: |
22955408 | 819 | #ifdef ICONV_OPTION |
ba525f77 | 820 | s = flags & RL_CONVERT ? iconv_buf.buf : buf; |
22955408 WD |
821 | #else |
822 | s = buf; | |
823 | #endif | |
ba525f77 | 824 | eob = s + bufsiz - 1; |
56014c8c WD |
825 | while (1) { |
826 | cnt = read(fd, &ch, 1); | |
827 | if (cnt < 0 && (errno == EWOULDBLOCK | |
828 | || errno == EINTR || errno == EAGAIN)) { | |
829 | struct timeval tv; | |
6c850772 WD |
830 | fd_set r_fds, e_fds; |
831 | FD_ZERO(&r_fds); | |
832 | FD_SET(fd, &r_fds); | |
833 | FD_ZERO(&e_fds); | |
834 | FD_SET(fd, &e_fds); | |
e626b29e | 835 | tv.tv_sec = select_timeout; |
56014c8c | 836 | tv.tv_usec = 0; |
6c850772 | 837 | if (!select(fd+1, &r_fds, NULL, &e_fds, &tv)) |
56014c8c | 838 | check_timeout(); |
35c8fd76 WD |
839 | /*if (FD_ISSET(fd, &e_fds)) |
840 | rprintf(FINFO, "select exception on fd %d\n", fd); */ | |
56014c8c WD |
841 | continue; |
842 | } | |
843 | if (cnt != 1) | |
844 | break; | |
ba525f77 | 845 | if (flags & RL_EOL_NULLS ? ch == '\0' : (ch == '\r' || ch == '\n')) { |
67b8f3df | 846 | /* Skip empty lines if dumping comments. */ |
ba525f77 | 847 | if (flags & RL_DUMP_COMMENTS && s == buf) |
56014c8c WD |
848 | continue; |
849 | break; | |
850 | } | |
851 | if (s < eob) | |
852 | *s++ = ch; | |
853 | } | |
854 | *s = '\0'; | |
7a55d06e | 855 | |
ba525f77 | 856 | if (flags & RL_DUMP_COMMENTS && (*buf == '#' || *buf == ';')) |
56014c8c WD |
857 | goto start; |
858 | ||
ba525f77 WD |
859 | #ifdef ICONV_OPTION |
860 | if (flags & RL_CONVERT) { | |
861 | xbuf outbuf; | |
862 | INIT_XBUF(outbuf, buf, 0, bufsiz); | |
863 | iconv_buf.pos = 0; | |
864 | iconv_buf.len = s - iconv_buf.buf; | |
865 | iconvbufs(ic_recv, &iconv_buf, &outbuf, | |
866 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE); | |
867 | outbuf.buf[outbuf.len] = '\0'; | |
868 | return outbuf.len; | |
869 | } | |
870 | #endif | |
871 | ||
67b8f3df WD |
872 | return s - buf; |
873 | } | |
874 | ||
53936ef9 WD |
875 | void read_args(int f_in, char *mod_name, char *buf, size_t bufsiz, int rl_nulls, |
876 | char ***argv_p, int *argc_p, char **request_p) | |
67b8f3df WD |
877 | { |
878 | int maxargs = MAX_ARGS; | |
879 | int dot_pos = 0; | |
880 | int argc = 0; | |
881 | char **argv, *p; | |
22955408 WD |
882 | int rl_flags = (rl_nulls ? RL_EOL_NULLS : 0); |
883 | ||
884 | #ifdef ICONV_OPTION | |
885 | rl_flags |= (protect_args && ic_recv != (iconv_t)-1 ? RL_CONVERT : 0); | |
886 | #endif | |
67b8f3df WD |
887 | |
888 | if (!(argv = new_array(char *, maxargs))) | |
889 | out_of_memory("read_args"); | |
53936ef9 | 890 | if (mod_name && !protect_args) |
67b8f3df WD |
891 | argv[argc++] = "rsyncd"; |
892 | ||
893 | while (1) { | |
ba525f77 | 894 | if (read_line(f_in, buf, bufsiz, rl_flags) == 0) |
67b8f3df WD |
895 | break; |
896 | ||
53936ef9 | 897 | if (argc == maxargs-1) { |
67b8f3df WD |
898 | maxargs += MAX_ARGS; |
899 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
900 | out_of_memory("read_args"); | |
901 | } | |
902 | ||
903 | if (dot_pos) { | |
904 | if (request_p) { | |
905 | *request_p = strdup(buf); | |
906 | request_p = NULL; | |
907 | } | |
908 | if (mod_name) | |
909 | glob_expand_module(mod_name, buf, &argv, &argc, &maxargs); | |
910 | else | |
911 | glob_expand(buf, &argv, &argc, &maxargs); | |
912 | } else { | |
913 | if (!(p = strdup(buf))) | |
914 | out_of_memory("read_args"); | |
915 | argv[argc++] = p; | |
916 | if (*p == '.' && p[1] == '\0') | |
917 | dot_pos = argc; | |
918 | } | |
919 | } | |
53936ef9 | 920 | argv[argc] = NULL; |
67b8f3df | 921 | |
987a5467 WD |
922 | glob_expand(NULL, NULL, NULL, NULL); |
923 | ||
67b8f3df WD |
924 | *argc_p = argc; |
925 | *argv_p = argv; | |
56014c8c | 926 | } |
7a55d06e | 927 | |
8ef246e0 | 928 | int io_start_buffering_out(int f_out) |
1f75bb10 | 929 | { |
8ef246e0 WD |
930 | if (iobuf_out) { |
931 | assert(f_out == iobuf_f_out); | |
932 | return 0; | |
933 | } | |
1f75bb10 WD |
934 | if (!(iobuf_out = new_array(char, IO_BUFFER_SIZE))) |
935 | out_of_memory("io_start_buffering_out"); | |
936 | iobuf_out_cnt = 0; | |
8ef246e0 WD |
937 | iobuf_f_out = f_out; |
938 | return 1; | |
1f75bb10 WD |
939 | } |
940 | ||
8ef246e0 | 941 | int io_start_buffering_in(int f_in) |
1f75bb10 | 942 | { |
8ef246e0 WD |
943 | if (iobuf_in) { |
944 | assert(f_in == iobuf_f_in); | |
945 | return 0; | |
946 | } | |
1f75bb10 WD |
947 | iobuf_in_siz = 2 * IO_BUFFER_SIZE; |
948 | if (!(iobuf_in = new_array(char, iobuf_in_siz))) | |
949 | out_of_memory("io_start_buffering_in"); | |
8ef246e0 WD |
950 | iobuf_f_in = f_in; |
951 | return 1; | |
1f75bb10 WD |
952 | } |
953 | ||
8ef246e0 | 954 | void io_end_buffering_in(void) |
1f75bb10 | 955 | { |
8ef246e0 WD |
956 | if (!iobuf_in) |
957 | return; | |
958 | free(iobuf_in); | |
959 | iobuf_in = NULL; | |
960 | iobuf_in_ndx = 0; | |
961 | iobuf_in_remaining = 0; | |
962 | iobuf_f_in = -1; | |
963 | } | |
964 | ||
965 | void io_end_buffering_out(void) | |
966 | { | |
967 | if (!iobuf_out) | |
968 | return; | |
969 | io_flush(FULL_FLUSH); | |
970 | free(iobuf_out); | |
971 | iobuf_out = NULL; | |
972 | iobuf_f_out = -1; | |
1f75bb10 WD |
973 | } |
974 | ||
be91bd81 | 975 | void maybe_flush_socket(int important) |
626bec8e | 976 | { |
be91bd81 WD |
977 | if (iobuf_out && iobuf_out_cnt |
978 | && (important || time(NULL) - last_io_out >= 5)) | |
626bec8e WD |
979 | io_flush(NORMAL_FLUSH); |
980 | } | |
981 | ||
cdf236aa | 982 | void maybe_send_keepalive(void) |
9e2409ab | 983 | { |
3b0a30eb | 984 | if (time(NULL) - last_io_out >= allowed_lull) { |
9e2409ab | 985 | if (!iobuf_out || !iobuf_out_cnt) { |
3221f451 WD |
986 | if (protocol_version < 29) |
987 | return; /* there's nothing we can do */ | |
8ef246e0 | 988 | if (protocol_version >= 30) |
332cf6df | 989 | send_msg(MSG_NOOP, "", 0, 0); |
8ef246e0 | 990 | else { |
9decb4d2 | 991 | write_int(sock_f_out, cur_flist->used); |
8ef246e0 WD |
992 | write_shortint(sock_f_out, ITEM_IS_NEW); |
993 | } | |
9e2409ab WD |
994 | } |
995 | if (iobuf_out) | |
996 | io_flush(NORMAL_FLUSH); | |
997 | } | |
998 | } | |
999 | ||
8ef246e0 WD |
1000 | void start_flist_forward(int f_in) |
1001 | { | |
1002 | assert(iobuf_out != NULL); | |
1003 | assert(iobuf_f_out == msg_fd_out); | |
1004 | flist_forward_from = f_in; | |
1005 | } | |
1006 | ||
1007 | void stop_flist_forward() | |
1008 | { | |
8ef246e0 | 1009 | flist_forward_from = -1; |
dde5b772 | 1010 | io_flush(FULL_FLUSH); |
8ef246e0 WD |
1011 | } |
1012 | ||
880da007 MP |
1013 | /** |
1014 | * Continue trying to read len bytes - don't return until len has been | |
1015 | * read. | |
1016 | **/ | |
3151cbae | 1017 | static void read_loop(int fd, char *buf, size_t len) |
4c36ddbe AT |
1018 | { |
1019 | while (len) { | |
1020 | int n = read_timeout(fd, buf, len); | |
1021 | ||
1022 | buf += n; | |
1023 | len -= n; | |
8d9dc9f9 AT |
1024 | } |
1025 | } | |
1026 | ||
7a55d06e MP |
1027 | /** |
1028 | * Read from the file descriptor handling multiplexing - return number | |
1029 | * of bytes read. | |
d62bcc17 WD |
1030 | * |
1031 | * Never returns <= 0. | |
7a55d06e | 1032 | */ |
c399d22a | 1033 | static int readfd_unbuffered(int fd, char *buf, size_t len) |
8d9dc9f9 | 1034 | { |
f2a4853c | 1035 | size_t msg_bytes; |
d8aeda1e | 1036 | int tag, cnt = 0; |
33544bf4 | 1037 | char line[BIGPATHBUFLEN]; |
8d9dc9f9 | 1038 | |
8ef246e0 | 1039 | if (!iobuf_in || fd != iobuf_f_in) |
4c36ddbe | 1040 | return read_timeout(fd, buf, len); |
8d9dc9f9 | 1041 | |
8ef246e0 WD |
1042 | if (!io_multiplexing_in && iobuf_in_remaining == 0) { |
1043 | iobuf_in_remaining = read_timeout(fd, iobuf_in, iobuf_in_siz); | |
1f75bb10 | 1044 | iobuf_in_ndx = 0; |
76c21947 WD |
1045 | } |
1046 | ||
d8aeda1e | 1047 | while (cnt == 0) { |
8ef246e0 WD |
1048 | if (iobuf_in_remaining) { |
1049 | len = MIN(len, iobuf_in_remaining); | |
1f75bb10 WD |
1050 | memcpy(buf, iobuf_in + iobuf_in_ndx, len); |
1051 | iobuf_in_ndx += len; | |
8ef246e0 | 1052 | iobuf_in_remaining -= len; |
d8aeda1e | 1053 | cnt = len; |
76c21947 | 1054 | break; |
8d9dc9f9 AT |
1055 | } |
1056 | ||
909ce14f | 1057 | read_loop(fd, line, 4); |
ff41a59f | 1058 | tag = IVAL(line, 0); |
679e7657 | 1059 | |
f2a4853c | 1060 | msg_bytes = tag & 0xFFFFFF; |
d17e1dd2 | 1061 | tag = (tag >> 24) - MPLEX_BASE; |
8d9dc9f9 | 1062 | |
d17e1dd2 WD |
1063 | switch (tag) { |
1064 | case MSG_DATA: | |
f2a4853c | 1065 | if (msg_bytes > iobuf_in_siz) { |
1f75bb10 | 1066 | if (!(iobuf_in = realloc_array(iobuf_in, char, |
f2a4853c | 1067 | msg_bytes))) |
c399d22a | 1068 | out_of_memory("readfd_unbuffered"); |
f2a4853c | 1069 | iobuf_in_siz = msg_bytes; |
76c21947 | 1070 | } |
f2a4853c | 1071 | read_loop(fd, iobuf_in, msg_bytes); |
8ef246e0 | 1072 | iobuf_in_remaining = msg_bytes; |
1f75bb10 | 1073 | iobuf_in_ndx = 0; |
d17e1dd2 | 1074 | break; |
8ef246e0 WD |
1075 | case MSG_NOOP: |
1076 | if (am_sender) | |
1077 | maybe_send_keepalive(); | |
1078 | break; | |
1079 | case MSG_IO_ERROR: | |
1080 | if (msg_bytes != 4) | |
1081 | goto invalid_msg; | |
1082 | read_loop(fd, line, msg_bytes); | |
e5f35681 | 1083 | send_msg_int(MSG_IO_ERROR, IVAL(line, 0)); |
8ef246e0 WD |
1084 | io_error |= IVAL(line, 0); |
1085 | break; | |
0d67e00a | 1086 | case MSG_DELETED: |
f2a4853c WD |
1087 | if (msg_bytes >= sizeof line) |
1088 | goto overflow; | |
332cf6df WD |
1089 | #ifdef ICONV_OPTION |
1090 | if (ic_recv != (iconv_t)-1) { | |
ba525f77 WD |
1091 | xbuf outbuf, inbuf; |
1092 | char ibuf[512]; | |
332cf6df | 1093 | int add_null = 0; |
ba525f77 WD |
1094 | |
1095 | INIT_CONST_XBUF(outbuf, line); | |
bb640d32 | 1096 | INIT_XBUF(inbuf, ibuf, 0, (size_t)-1); |
ba525f77 | 1097 | |
332cf6df | 1098 | while (msg_bytes) { |
ba525f77 WD |
1099 | inbuf.len = msg_bytes > sizeof ibuf |
1100 | ? sizeof ibuf : msg_bytes; | |
1101 | read_loop(fd, inbuf.buf, inbuf.len); | |
1102 | if (!(msg_bytes -= inbuf.len) | |
1103 | && !ibuf[inbuf.len-1]) | |
1104 | inbuf.len--, add_null = 1; | |
1105 | if (iconvbufs(ic_send, &inbuf, &outbuf, | |
1106 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE) < 0) | |
1107 | goto overflow; | |
ba525f77 WD |
1108 | } |
1109 | if (add_null) { | |
1110 | if (outbuf.len == outbuf.size) | |
1111 | goto overflow; | |
1112 | outbuf.buf[outbuf.len++] = '\0'; | |
332cf6df | 1113 | } |
ba525f77 | 1114 | msg_bytes = outbuf.len; |
332cf6df WD |
1115 | } else |
1116 | #endif | |
1117 | read_loop(fd, line, msg_bytes); | |
0d67e00a | 1118 | /* A directory name was sent with the trailing null */ |
f2a4853c | 1119 | if (msg_bytes > 0 && !line[msg_bytes-1]) |
0d67e00a | 1120 | log_delete(line, S_IFDIR); |
12bda6f7 WD |
1121 | else { |
1122 | line[msg_bytes] = '\0'; | |
0d67e00a | 1123 | log_delete(line, S_IFREG); |
12bda6f7 | 1124 | } |
0d67e00a | 1125 | break; |
9981c27e | 1126 | case MSG_SUCCESS: |
f2a4853c | 1127 | if (msg_bytes != 4) { |
8ef246e0 | 1128 | invalid_msg: |
cdf236aa | 1129 | rprintf(FERROR, "invalid multi-message %d:%ld [%s]\n", |
f2a4853c | 1130 | tag, (long)msg_bytes, who_am_i()); |
9981c27e WD |
1131 | exit_cleanup(RERR_STREAMIO); |
1132 | } | |
f2a4853c | 1133 | read_loop(fd, line, msg_bytes); |
9981c27e | 1134 | successful_send(IVAL(line, 0)); |
9981c27e | 1135 | break; |
8ef246e0 WD |
1136 | case MSG_NO_SEND: |
1137 | if (msg_bytes != 4) | |
1138 | goto invalid_msg; | |
1139 | read_loop(fd, line, msg_bytes); | |
1140 | send_msg_int(MSG_NO_SEND, IVAL(line, 0)); | |
1141 | break; | |
d17e1dd2 WD |
1142 | case MSG_INFO: |
1143 | case MSG_ERROR: | |
3f0211b6 WD |
1144 | case MSG_ERROR_XFER: |
1145 | case MSG_WARNING: | |
f2a4853c WD |
1146 | if (msg_bytes >= sizeof line) { |
1147 | overflow: | |
bd9fca47 | 1148 | rprintf(FERROR, |
cdf236aa | 1149 | "multiplexing overflow %d:%ld [%s]\n", |
f2a4853c | 1150 | tag, (long)msg_bytes, who_am_i()); |
d17e1dd2 WD |
1151 | exit_cleanup(RERR_STREAMIO); |
1152 | } | |
f2a4853c | 1153 | read_loop(fd, line, msg_bytes); |
332cf6df | 1154 | rwrite((enum logcode)tag, line, msg_bytes, 1); |
7f9bf6b7 WD |
1155 | if (first_message) { |
1156 | if (list_only && !am_sender && tag == 1) { | |
1157 | line[msg_bytes] = '\0'; | |
1158 | check_for_d_option_error(line); | |
1159 | } | |
1160 | first_message = 0; | |
1161 | } | |
d17e1dd2 WD |
1162 | break; |
1163 | default: | |
cdf236aa WD |
1164 | rprintf(FERROR, "unexpected tag %d [%s]\n", |
1165 | tag, who_am_i()); | |
65417579 | 1166 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 | 1167 | } |
8d9dc9f9 AT |
1168 | } |
1169 | ||
8ef246e0 | 1170 | if (iobuf_in_remaining == 0) |
d17e1dd2 | 1171 | io_flush(NORMAL_FLUSH); |
76c21947 | 1172 | |
d8aeda1e | 1173 | return cnt; |
8d9dc9f9 AT |
1174 | } |
1175 | ||
dde5b772 WD |
1176 | /* Do a buffered read from fd. Don't return until all N bytes have |
1177 | * been read. If all N can't be read then exit with an error. */ | |
3151cbae | 1178 | static void readfd(int fd, char *buffer, size_t N) |
720b47f2 | 1179 | { |
d8aeda1e | 1180 | int cnt; |
d62bcc17 | 1181 | size_t total = 0; |
3151cbae | 1182 | |
6ba9279f | 1183 | while (total < N) { |
d8aeda1e WD |
1184 | cnt = readfd_unbuffered(fd, buffer + total, N-total); |
1185 | total += cnt; | |
7f28dbee | 1186 | } |
1b7c47cb | 1187 | |
b9f592fb WD |
1188 | if (fd == write_batch_monitor_in) { |
1189 | if ((size_t)write(batch_fd, buffer, total) != total) | |
1190 | exit_cleanup(RERR_FILEIO); | |
1191 | } | |
1f75bb10 | 1192 | |
8ef246e0 WD |
1193 | if (fd == flist_forward_from) |
1194 | writefd(iobuf_f_out, buffer, total); | |
1195 | ||
1f75bb10 WD |
1196 | if (fd == sock_f_in) |
1197 | stats.total_read += total; | |
720b47f2 AT |
1198 | } |
1199 | ||
3a993aa4 | 1200 | unsigned short read_shortint(int f) |
9361f839 | 1201 | { |
482f48cc WD |
1202 | char b[2]; |
1203 | readfd(f, b, 2); | |
1204 | return (UVAL(b, 1) << 8) + UVAL(b, 0); | |
9361f839 WD |
1205 | } |
1206 | ||
b7922338 | 1207 | int32 read_int(int f) |
720b47f2 | 1208 | { |
4c36ddbe | 1209 | char b[4]; |
d8aeda1e | 1210 | int32 num; |
d730b113 | 1211 | |
482f48cc WD |
1212 | readfd(f, b, 4); |
1213 | num = IVAL(b, 0); | |
1214 | #if SIZEOF_INT32 > 4 | |
1215 | if (num & (int32)0x80000000) | |
1216 | num |= ~(int32)0xffffffff; | |
1217 | #endif | |
d8aeda1e | 1218 | return num; |
720b47f2 AT |
1219 | } |
1220 | ||
351e23ad | 1221 | int32 read_varint(int f) |
3a6a366f | 1222 | { |
351e23ad WD |
1223 | union { |
1224 | char b[5]; | |
1225 | int32 x; | |
1226 | } u; | |
1227 | uchar ch; | |
1228 | int extra; | |
1229 | ||
1230 | u.x = 0; | |
1231 | readfd(f, (char*)&ch, 1); | |
1232 | extra = int_byte_extra[ch / 4]; | |
1233 | if (extra) { | |
1234 | uchar bit = ((uchar)1<<(8-extra)); | |
1235 | if (extra >= (int)sizeof u.b) { | |
1236 | rprintf(FERROR, "Overflow in read_varint()\n"); | |
1237 | exit_cleanup(RERR_STREAMIO); | |
1238 | } | |
1239 | readfd(f, u.b, extra); | |
1240 | u.b[extra] = ch & (bit-1); | |
1241 | } else | |
1242 | u.b[0] = ch; | |
1243 | #if CAREFUL_ALIGNMENT | |
1244 | u.x = IVAL(u.b,0); | |
1245 | #endif | |
1246 | #if SIZEOF_INT32 > 4 | |
1247 | if (u.x & (int32)0x80000000) | |
1248 | u.x |= ~(int32)0xffffffff; | |
1249 | #endif | |
1250 | return u.x; | |
1251 | } | |
71c46176 | 1252 | |
351e23ad WD |
1253 | int64 read_varlong(int f, uchar min_bytes) |
1254 | { | |
1255 | union { | |
1256 | char b[9]; | |
1257 | int64 x; | |
1258 | } u; | |
1259 | char b2[8]; | |
1260 | int extra; | |
71c46176 | 1261 | |
031fa9ad | 1262 | #if SIZEOF_INT64 < 8 |
351e23ad | 1263 | memset(u.b, 0, 8); |
031fa9ad | 1264 | #else |
351e23ad | 1265 | u.x = 0; |
031fa9ad | 1266 | #endif |
351e23ad WD |
1267 | readfd(f, b2, min_bytes); |
1268 | memcpy(u.b, b2+1, min_bytes-1); | |
1269 | extra = int_byte_extra[CVAL(b2, 0) / 4]; | |
1270 | if (extra) { | |
1271 | uchar bit = ((uchar)1<<(8-extra)); | |
1272 | if (min_bytes + extra > (int)sizeof u.b) { | |
1273 | rprintf(FERROR, "Overflow in read_varlong()\n"); | |
1274 | exit_cleanup(RERR_STREAMIO); | |
1275 | } | |
1276 | readfd(f, u.b + min_bytes - 1, extra); | |
1277 | u.b[min_bytes + extra - 1] = CVAL(b2, 0) & (bit-1); | |
4ea4acf1 | 1278 | #if SIZEOF_INT64 < 8 |
351e23ad | 1279 | if (min_bytes + extra > 5 || u.b[4] || CVAL(u.b,3) & 0x80) { |
4ea4acf1 WD |
1280 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); |
1281 | exit_cleanup(RERR_UNSUPPORTED); | |
1282 | } | |
1283 | #endif | |
351e23ad WD |
1284 | } else |
1285 | u.b[min_bytes + extra - 1] = CVAL(b2, 0); | |
1286 | #if SIZEOF_INT64 < 8 | |
1287 | u.x = IVAL(u.b,0); | |
1288 | #elif CAREFUL_ALIGNMENT | |
1289 | u.x = IVAL(u.b,0) | (((int64)IVAL(u.b,4))<<32); | |
1290 | #endif | |
1291 | return u.x; | |
1292 | } | |
1293 | ||
1294 | int64 read_longint(int f) | |
1295 | { | |
4ea4acf1 | 1296 | #if SIZEOF_INT64 >= 8 |
351e23ad | 1297 | char b[9]; |
4ea4acf1 | 1298 | #endif |
351e23ad | 1299 | int32 num = read_int(f); |
71c46176 | 1300 | |
351e23ad WD |
1301 | if (num != (int32)0xffffffff) |
1302 | return num; | |
1303 | ||
1304 | #if SIZEOF_INT64 < 8 | |
1305 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); | |
1306 | exit_cleanup(RERR_UNSUPPORTED); | |
1307 | #else | |
1308 | readfd(f, b, 8); | |
1309 | return IVAL(b,0) | (((int64)IVAL(b,4))<<32); | |
1310 | #endif | |
3a6a366f AT |
1311 | } |
1312 | ||
4a19c3b2 | 1313 | void read_buf(int f, char *buf, size_t len) |
720b47f2 | 1314 | { |
4c36ddbe | 1315 | readfd(f,buf,len); |
720b47f2 AT |
1316 | } |
1317 | ||
4a19c3b2 | 1318 | void read_sbuf(int f, char *buf, size_t len) |
575f2fca | 1319 | { |
93095cbe | 1320 | readfd(f, buf, len); |
af436313 | 1321 | buf[len] = '\0'; |
575f2fca AT |
1322 | } |
1323 | ||
9361f839 | 1324 | uchar read_byte(int f) |
182dca5c | 1325 | { |
9361f839 | 1326 | uchar c; |
93095cbe | 1327 | readfd(f, (char *)&c, 1); |
4c36ddbe | 1328 | return c; |
182dca5c | 1329 | } |
720b47f2 | 1330 | |
46e99b09 WD |
1331 | int read_vstring(int f, char *buf, int bufsize) |
1332 | { | |
1333 | int len = read_byte(f); | |
1334 | ||
1335 | if (len & 0x80) | |
1336 | len = (len & ~0x80) * 0x100 + read_byte(f); | |
1337 | ||
1338 | if (len >= bufsize) { | |
1339 | rprintf(FERROR, "over-long vstring received (%d > %d)\n", | |
1340 | len, bufsize - 1); | |
9a6ed83f | 1341 | return -1; |
46e99b09 WD |
1342 | } |
1343 | ||
1344 | if (len) | |
1345 | readfd(f, buf, len); | |
1346 | buf[len] = '\0'; | |
1347 | return len; | |
1348 | } | |
1349 | ||
188fed95 WD |
1350 | /* Populate a sum_struct with values from the socket. This is |
1351 | * called by both the sender and the receiver. */ | |
1352 | void read_sum_head(int f, struct sum_struct *sum) | |
1353 | { | |
8bd77e70 | 1354 | int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE; |
188fed95 | 1355 | sum->count = read_int(f); |
c638caa6 WD |
1356 | if (sum->count < 0) { |
1357 | rprintf(FERROR, "Invalid checksum count %ld [%s]\n", | |
1358 | (long)sum->count, who_am_i()); | |
1359 | exit_cleanup(RERR_PROTOCOL); | |
1360 | } | |
188fed95 | 1361 | sum->blength = read_int(f); |
8bd77e70 | 1362 | if (sum->blength < 0 || sum->blength > max_blength) { |
cdf236aa WD |
1363 | rprintf(FERROR, "Invalid block length %ld [%s]\n", |
1364 | (long)sum->blength, who_am_i()); | |
188fed95 WD |
1365 | exit_cleanup(RERR_PROTOCOL); |
1366 | } | |
1367 | sum->s2length = protocol_version < 27 ? csum_length : (int)read_int(f); | |
a0456b9c | 1368 | if (sum->s2length < 0 || sum->s2length > MAX_DIGEST_LEN) { |
cdf236aa WD |
1369 | rprintf(FERROR, "Invalid checksum length %d [%s]\n", |
1370 | sum->s2length, who_am_i()); | |
188fed95 WD |
1371 | exit_cleanup(RERR_PROTOCOL); |
1372 | } | |
1373 | sum->remainder = read_int(f); | |
1374 | if (sum->remainder < 0 || sum->remainder > sum->blength) { | |
cdf236aa WD |
1375 | rprintf(FERROR, "Invalid remainder length %ld [%s]\n", |
1376 | (long)sum->remainder, who_am_i()); | |
188fed95 WD |
1377 | exit_cleanup(RERR_PROTOCOL); |
1378 | } | |
1379 | } | |
1380 | ||
c207d7ec WD |
1381 | /* Send the values from a sum_struct over the socket. Set sum to |
1382 | * NULL if there are no checksums to send. This is called by both | |
1383 | * the generator and the sender. */ | |
1384 | void write_sum_head(int f, struct sum_struct *sum) | |
1385 | { | |
1386 | static struct sum_struct null_sum; | |
1387 | ||
1388 | if (sum == NULL) | |
1389 | sum = &null_sum; | |
1390 | ||
1391 | write_int(f, sum->count); | |
1392 | write_int(f, sum->blength); | |
1393 | if (protocol_version >= 27) | |
1394 | write_int(f, sum->s2length); | |
1395 | write_int(f, sum->remainder); | |
1396 | } | |
1397 | ||
08571358 MP |
1398 | /** |
1399 | * Sleep after writing to limit I/O bandwidth usage. | |
1400 | * | |
1401 | * @todo Rather than sleeping after each write, it might be better to | |
1402 | * use some kind of averaging. The current algorithm seems to always | |
1403 | * use a bit less bandwidth than specified, because it doesn't make up | |
1404 | * for slow periods. But arguably this is a feature. In addition, we | |
1405 | * ought to take the time used to write the data into account. | |
71e58630 WD |
1406 | * |
1407 | * During some phases of big transfers (file FOO is uptodate) this is | |
1408 | * called with a small bytes_written every time. As the kernel has to | |
1409 | * round small waits up to guarantee that we actually wait at least the | |
1410 | * requested number of microseconds, this can become grossly inaccurate. | |
1411 | * We therefore keep track of the bytes we've written over time and only | |
1412 | * sleep when the accumulated delay is at least 1 tenth of a second. | |
08571358 MP |
1413 | **/ |
1414 | static void sleep_for_bwlimit(int bytes_written) | |
1415 | { | |
71e58630 | 1416 | static struct timeval prior_tv; |
0f78b815 | 1417 | static long total_written = 0; |
71e58630 WD |
1418 | struct timeval tv, start_tv; |
1419 | long elapsed_usec, sleep_usec; | |
1420 | ||
1421 | #define ONE_SEC 1000000L /* # of microseconds in a second */ | |
08571358 | 1422 | |
9a0cfff5 | 1423 | if (!bwlimit_writemax) |
08571358 | 1424 | return; |
e681e820 | 1425 | |
0f78b815 | 1426 | total_written += bytes_written; |
71e58630 WD |
1427 | |
1428 | gettimeofday(&start_tv, NULL); | |
1429 | if (prior_tv.tv_sec) { | |
1430 | elapsed_usec = (start_tv.tv_sec - prior_tv.tv_sec) * ONE_SEC | |
1431 | + (start_tv.tv_usec - prior_tv.tv_usec); | |
1432 | total_written -= elapsed_usec * bwlimit / (ONE_SEC/1024); | |
1433 | if (total_written < 0) | |
1434 | total_written = 0; | |
1435 | } | |
3151cbae | 1436 | |
71e58630 WD |
1437 | sleep_usec = total_written * (ONE_SEC/1024) / bwlimit; |
1438 | if (sleep_usec < ONE_SEC / 10) { | |
1439 | prior_tv = start_tv; | |
1440 | return; | |
1441 | } | |
08571358 | 1442 | |
71e58630 WD |
1443 | tv.tv_sec = sleep_usec / ONE_SEC; |
1444 | tv.tv_usec = sleep_usec % ONE_SEC; | |
98b332ed | 1445 | select(0, NULL, NULL, NULL, &tv); |
71e58630 WD |
1446 | |
1447 | gettimeofday(&prior_tv, NULL); | |
1448 | elapsed_usec = (prior_tv.tv_sec - start_tv.tv_sec) * ONE_SEC | |
1449 | + (prior_tv.tv_usec - start_tv.tv_usec); | |
1450 | total_written = (sleep_usec - elapsed_usec) * bwlimit / (ONE_SEC/1024); | |
08571358 MP |
1451 | } |
1452 | ||
1f75bb10 | 1453 | /* Write len bytes to the file descriptor fd, looping as necessary to get |
0fb2fc4a | 1454 | * the job done and also (in certain circumstances) reading any data on |
af436313 | 1455 | * msg_fd_in to avoid deadlock. |
880da007 MP |
1456 | * |
1457 | * This function underlies the multiplexing system. The body of the | |
1f75bb10 | 1458 | * application never calls this function directly. */ |
4a19c3b2 | 1459 | static void writefd_unbuffered(int fd, const char *buf, size_t len) |
720b47f2 | 1460 | { |
1ea087a7 | 1461 | size_t n, total = 0; |
6c850772 | 1462 | fd_set w_fds, r_fds, e_fds; |
d8aeda1e | 1463 | int maxfd, count, cnt, using_r_fds; |
e4c877cf | 1464 | int defer_inc = 0; |
8d9dc9f9 | 1465 | struct timeval tv; |
720b47f2 | 1466 | |
3be97bf9 | 1467 | if (no_flush++) |
e4c877cf | 1468 | defer_forwarding_messages++, defer_inc++; |
e44f9a12 | 1469 | |
4c36ddbe | 1470 | while (total < len) { |
8d9dc9f9 | 1471 | FD_ZERO(&w_fds); |
6c850772 WD |
1472 | FD_SET(fd, &w_fds); |
1473 | FD_ZERO(&e_fds); | |
1474 | FD_SET(fd, &e_fds); | |
1ea087a7 | 1475 | maxfd = fd; |
4c36ddbe | 1476 | |
954bbed8 | 1477 | if (msg_fd_in >= 0) { |
56014c8c | 1478 | FD_ZERO(&r_fds); |
6c850772 | 1479 | FD_SET(msg_fd_in, &r_fds); |
1ea087a7 WD |
1480 | if (msg_fd_in > maxfd) |
1481 | maxfd = msg_fd_in; | |
3eeac9bc WD |
1482 | using_r_fds = 1; |
1483 | } else | |
1484 | using_r_fds = 0; | |
8d9dc9f9 | 1485 | |
e626b29e | 1486 | tv.tv_sec = select_timeout; |
8d9dc9f9 | 1487 | tv.tv_usec = 0; |
4c36ddbe | 1488 | |
554e0a8d | 1489 | errno = 0; |
3eeac9bc | 1490 | count = select(maxfd + 1, using_r_fds ? &r_fds : NULL, |
6c850772 | 1491 | &w_fds, &e_fds, &tv); |
4c36ddbe AT |
1492 | |
1493 | if (count <= 0) { | |
1ea087a7 | 1494 | if (count < 0 && errno == EBADF) |
554e0a8d | 1495 | exit_cleanup(RERR_SOCKETIO); |
bd717af8 | 1496 | check_timeout(); |
8d9dc9f9 AT |
1497 | continue; |
1498 | } | |
4c36ddbe | 1499 | |
35c8fd76 WD |
1500 | /*if (FD_ISSET(fd, &e_fds)) |
1501 | rprintf(FINFO, "select exception on fd %d\n", fd); */ | |
6c850772 | 1502 | |
3eeac9bc | 1503 | if (using_r_fds && FD_ISSET(msg_fd_in, &r_fds)) |
d17e1dd2 | 1504 | read_msg_fd(); |
554e0a8d | 1505 | |
9a6ed83f | 1506 | if (!FD_ISSET(fd, &w_fds)) |
1ea087a7 | 1507 | continue; |
4c36ddbe | 1508 | |
1ea087a7 | 1509 | n = len - total; |
9a0cfff5 | 1510 | if (bwlimit_writemax && n > bwlimit_writemax) |
1ea087a7 | 1511 | n = bwlimit_writemax; |
d8aeda1e | 1512 | cnt = write(fd, buf + total, n); |
1ea087a7 | 1513 | |
d8aeda1e WD |
1514 | if (cnt <= 0) { |
1515 | if (cnt < 0) { | |
3309507d WD |
1516 | if (errno == EINTR) |
1517 | continue; | |
1518 | if (errno == EWOULDBLOCK || errno == EAGAIN) { | |
1519 | msleep(1); | |
1520 | continue; | |
1521 | } | |
f0359dd0 AT |
1522 | } |
1523 | ||
1ea087a7 | 1524 | /* Don't try to write errors back across the stream. */ |
1f75bb10 | 1525 | if (fd == sock_f_out) |
8ef246e0 | 1526 | io_end_multiplex_out(); |
2a5df862 WD |
1527 | /* Don't try to write errors down a failing msg pipe. */ |
1528 | if (am_server && fd == msg_fd_out) | |
1529 | exit_cleanup(RERR_STREAMIO); | |
1ea087a7 | 1530 | rsyserr(FERROR, errno, |
b88c2e8f WD |
1531 | "writefd_unbuffered failed to write %ld bytes [%s]", |
1532 | (long)len, who_am_i()); | |
d1b31da7 WD |
1533 | /* If the other side is sending us error messages, try |
1534 | * to grab any messages they sent before they died. */ | |
f2179fd3 | 1535 | while (!am_server && fd == sock_f_out && io_multiplexing_in) { |
ba525f77 | 1536 | char buf[1024]; |
3b0a30eb | 1537 | set_io_timeout(30); |
9e2409ab | 1538 | ignore_timeout = 0; |
ba525f77 | 1539 | readfd_unbuffered(sock_f_in, buf, sizeof buf); |
d1b31da7 | 1540 | } |
1ea087a7 WD |
1541 | exit_cleanup(RERR_STREAMIO); |
1542 | } | |
4c36ddbe | 1543 | |
d8aeda1e | 1544 | total += cnt; |
e4c877cf | 1545 | defer_forwarding_messages++, defer_inc++; |
a800434a | 1546 | |
1f75bb10 | 1547 | if (fd == sock_f_out) { |
626bec8e | 1548 | if (io_timeout || am_generator) |
3b0a30eb | 1549 | last_io_out = time(NULL); |
d8aeda1e | 1550 | sleep_for_bwlimit(cnt); |
1f75bb10 | 1551 | } |
4c36ddbe | 1552 | } |
e44f9a12 AT |
1553 | |
1554 | no_flush--; | |
17a4977b WD |
1555 | defer_inc -= defer_forwarding_keep; |
1556 | if (!(defer_forwarding_messages -= defer_inc) && !no_flush) | |
e4c877cf | 1557 | msg_flush(); |
d6dead6b AT |
1558 | } |
1559 | ||
dde5b772 | 1560 | void io_flush(int flush_it_all) |
d6dead6b | 1561 | { |
1f75bb10 | 1562 | if (!iobuf_out_cnt || no_flush) |
d17e1dd2 | 1563 | return; |
8d9dc9f9 | 1564 | |
d17e1dd2 | 1565 | if (io_multiplexing_out) |
332cf6df | 1566 | mplex_write(sock_f_out, MSG_DATA, iobuf_out, iobuf_out_cnt, 0); |
d17e1dd2 | 1567 | else |
8ef246e0 | 1568 | writefd_unbuffered(iobuf_f_out, iobuf_out, iobuf_out_cnt); |
1f75bb10 | 1569 | iobuf_out_cnt = 0; |
e4c877cf WD |
1570 | |
1571 | if (flush_it_all && !defer_forwarding_messages) | |
1572 | msg_flush(); | |
8d9dc9f9 AT |
1573 | } |
1574 | ||
4a19c3b2 | 1575 | static void writefd(int fd, const char *buf, size_t len) |
d6dead6b | 1576 | { |
1f75bb10 WD |
1577 | if (fd == sock_f_out) |
1578 | stats.total_written += len; | |
1579 | ||
b9f592fb WD |
1580 | if (fd == write_batch_monitor_out) { |
1581 | if ((size_t)write(batch_fd, buf, len) != len) | |
1582 | exit_cleanup(RERR_FILEIO); | |
1583 | } | |
1584 | ||
8ef246e0 | 1585 | if (!iobuf_out || fd != iobuf_f_out) { |
4c36ddbe AT |
1586 | writefd_unbuffered(fd, buf, len); |
1587 | return; | |
1588 | } | |
d6dead6b AT |
1589 | |
1590 | while (len) { | |
1f75bb10 | 1591 | int n = MIN((int)len, IO_BUFFER_SIZE - iobuf_out_cnt); |
d6dead6b | 1592 | if (n > 0) { |
1f75bb10 | 1593 | memcpy(iobuf_out+iobuf_out_cnt, buf, n); |
d6dead6b AT |
1594 | buf += n; |
1595 | len -= n; | |
1f75bb10 | 1596 | iobuf_out_cnt += n; |
d6dead6b | 1597 | } |
3151cbae | 1598 | |
1f75bb10 | 1599 | if (iobuf_out_cnt == IO_BUFFER_SIZE) |
d17e1dd2 | 1600 | io_flush(NORMAL_FLUSH); |
d6dead6b | 1601 | } |
d6dead6b | 1602 | } |
720b47f2 | 1603 | |
3a993aa4 | 1604 | void write_shortint(int f, unsigned short x) |
9361f839 | 1605 | { |
3a993aa4 WD |
1606 | char b[2]; |
1607 | b[0] = (char)x; | |
1608 | b[1] = (char)(x >> 8); | |
1609 | writefd(f, b, 2); | |
9361f839 WD |
1610 | } |
1611 | ||
351e23ad WD |
1612 | void write_int(int f, int32 x) |
1613 | { | |
1614 | char b[4]; | |
1615 | SIVAL(b, 0, x); | |
1616 | writefd(f, b, 4); | |
1617 | } | |
1618 | ||
f31514ad | 1619 | void write_varint(int f, int32 x) |
1c3344a1 WD |
1620 | { |
1621 | char b[5]; | |
351e23ad WD |
1622 | uchar bit; |
1623 | int cnt = 4; | |
1624 | ||
1625 | SIVAL(b, 1, x); | |
1626 | ||
1627 | while (cnt > 1 && b[cnt] == 0) | |
1628 | cnt--; | |
1629 | bit = ((uchar)1<<(7-cnt+1)); | |
1630 | if (CVAL(b, cnt) >= bit) { | |
1631 | cnt++; | |
1632 | *b = ~(bit-1); | |
1633 | } else if (cnt > 1) | |
1634 | *b = b[cnt] | ~(bit*2-1); | |
1635 | else | |
1636 | *b = b[cnt]; | |
1637 | ||
1638 | writefd(f, b, cnt); | |
1c3344a1 WD |
1639 | } |
1640 | ||
351e23ad | 1641 | void write_varlong(int f, int64 x, uchar min_bytes) |
720b47f2 | 1642 | { |
351e23ad WD |
1643 | char b[9]; |
1644 | uchar bit; | |
1645 | int cnt = 8; | |
1646 | ||
1647 | SIVAL(b, 1, x); | |
1648 | #if SIZEOF_INT64 >= 8 | |
1649 | SIVAL(b, 5, x >> 32); | |
1650 | #else | |
1651 | if (x <= 0x7FFFFFFF && x >= 0) | |
1652 | memset(b + 5, 0, 4); | |
1653 | else { | |
1654 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); | |
1655 | exit_cleanup(RERR_UNSUPPORTED); | |
1656 | } | |
1657 | #endif | |
1658 | ||
1659 | while (cnt > min_bytes && b[cnt] == 0) | |
1660 | cnt--; | |
1661 | bit = ((uchar)1<<(7-cnt+min_bytes)); | |
1662 | if (CVAL(b, cnt) >= bit) { | |
1663 | cnt++; | |
1664 | *b = ~(bit-1); | |
1665 | } else if (cnt > min_bytes) | |
1666 | *b = b[cnt] | ~(bit*2-1); | |
1667 | else | |
1668 | *b = b[cnt]; | |
1669 | ||
1670 | writefd(f, b, cnt); | |
720b47f2 AT |
1671 | } |
1672 | ||
7a24c346 MP |
1673 | /* |
1674 | * Note: int64 may actually be a 32-bit type if ./configure couldn't find any | |
1675 | * 64-bit types on this platform. | |
1676 | */ | |
71c46176 | 1677 | void write_longint(int f, int64 x) |
3a6a366f | 1678 | { |
351e23ad | 1679 | char b[12], * const s = b+4; |
3a6a366f | 1680 | |
351e23ad WD |
1681 | SIVAL(s, 0, x); |
1682 | if (x <= 0x7FFFFFFF && x >= 0) { | |
482f48cc | 1683 | writefd(f, s, 4); |
351e23ad WD |
1684 | return; |
1685 | } | |
3a6a366f | 1686 | |
4ea4acf1 | 1687 | #if SIZEOF_INT64 < 8 |
351e23ad WD |
1688 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); |
1689 | exit_cleanup(RERR_UNSUPPORTED); | |
4ea4acf1 | 1690 | #else |
351e23ad WD |
1691 | memset(b, 0xFF, 4); |
1692 | SIVAL(s, 4, x >> 32); | |
1693 | writefd(f, b, 12); | |
4ea4acf1 | 1694 | #endif |
3a6a366f AT |
1695 | } |
1696 | ||
4a19c3b2 | 1697 | void write_buf(int f, const char *buf, size_t len) |
720b47f2 | 1698 | { |
4c36ddbe | 1699 | writefd(f,buf,len); |
720b47f2 AT |
1700 | } |
1701 | ||
880da007 | 1702 | /** Write a string to the connection */ |
4a19c3b2 | 1703 | void write_sbuf(int f, const char *buf) |
f0fca04e | 1704 | { |
93095cbe | 1705 | writefd(f, buf, strlen(buf)); |
f0fca04e AT |
1706 | } |
1707 | ||
9361f839 | 1708 | void write_byte(int f, uchar c) |
182dca5c | 1709 | { |
93095cbe | 1710 | writefd(f, (char *)&c, 1); |
182dca5c AT |
1711 | } |
1712 | ||
4a19c3b2 | 1713 | void write_vstring(int f, const char *str, int len) |
46e99b09 WD |
1714 | { |
1715 | uchar lenbuf[3], *lb = lenbuf; | |
1716 | ||
1717 | if (len > 0x7F) { | |
1718 | if (len > 0x7FFF) { | |
1719 | rprintf(FERROR, | |
1720 | "attempting to send over-long vstring (%d > %d)\n", | |
1721 | len, 0x7FFF); | |
1722 | exit_cleanup(RERR_PROTOCOL); | |
1723 | } | |
1724 | *lb++ = len / 0x100 + 0x80; | |
1725 | } | |
1726 | *lb = len; | |
1727 | ||
1728 | writefd(f, (char*)lenbuf, lb - lenbuf + 1); | |
1729 | if (len) | |
1730 | writefd(f, str, len); | |
1731 | } | |
1732 | ||
8a65e0ce WD |
1733 | /* Send a file-list index using a byte-reduction method. */ |
1734 | void write_ndx(int f, int32 ndx) | |
1735 | { | |
1736 | static int32 prev_positive = -1, prev_negative = 1; | |
1737 | int32 diff, cnt = 0; | |
1738 | char b[6]; | |
1739 | ||
1740 | if (protocol_version < 30 || read_batch) { | |
1741 | write_int(f, ndx); | |
1742 | return; | |
1743 | } | |
1744 | ||
1745 | /* Send NDX_DONE as a single-byte 0 with no side effects. Send | |
1746 | * negative nums as a positive after sending a leading 0xFF. */ | |
1747 | if (ndx >= 0) { | |
1748 | diff = ndx - prev_positive; | |
1749 | prev_positive = ndx; | |
1750 | } else if (ndx == NDX_DONE) { | |
1751 | *b = 0; | |
1752 | writefd(f, b, 1); | |
1753 | return; | |
1754 | } else { | |
1755 | b[cnt++] = (char)0xFF; | |
1756 | ndx = -ndx; | |
1757 | diff = ndx - prev_negative; | |
1758 | prev_negative = ndx; | |
1759 | } | |
1760 | ||
1761 | /* A diff of 1 - 253 is sent as a one-byte diff; a diff of 254 - 32767 | |
1762 | * or 0 is sent as a 0xFE + a two-byte diff; otherwise we send 0xFE | |
1763 | * & all 4 bytes of the (non-negative) num with the high-bit set. */ | |
1764 | if (diff < 0xFE && diff > 0) | |
1765 | b[cnt++] = (char)diff; | |
1766 | else if (diff < 0 || diff > 0x7FFF) { | |
1767 | b[cnt++] = (char)0xFE; | |
1768 | b[cnt++] = (char)((ndx >> 24) | 0x80); | |
8a65e0ce | 1769 | b[cnt++] = (char)ndx; |
351e23ad WD |
1770 | b[cnt++] = (char)(ndx >> 8); |
1771 | b[cnt++] = (char)(ndx >> 16); | |
8a65e0ce WD |
1772 | } else { |
1773 | b[cnt++] = (char)0xFE; | |
1774 | b[cnt++] = (char)(diff >> 8); | |
1775 | b[cnt++] = (char)diff; | |
1776 | } | |
1777 | writefd(f, b, cnt); | |
1778 | } | |
1779 | ||
1780 | /* Receive a file-list index using a byte-reduction method. */ | |
1781 | int32 read_ndx(int f) | |
1782 | { | |
1783 | static int32 prev_positive = -1, prev_negative = 1; | |
1784 | int32 *prev_ptr, num; | |
1785 | char b[4]; | |
1786 | ||
1787 | if (protocol_version < 30) | |
1788 | return read_int(f); | |
1789 | ||
1790 | readfd(f, b, 1); | |
1791 | if (CVAL(b, 0) == 0xFF) { | |
1792 | readfd(f, b, 1); | |
1793 | prev_ptr = &prev_negative; | |
1794 | } else if (CVAL(b, 0) == 0) | |
1795 | return NDX_DONE; | |
1796 | else | |
1797 | prev_ptr = &prev_positive; | |
1798 | if (CVAL(b, 0) == 0xFE) { | |
1799 | readfd(f, b, 2); | |
1800 | if (CVAL(b, 0) & 0x80) { | |
351e23ad WD |
1801 | b[3] = CVAL(b, 0) & ~0x80; |
1802 | b[0] = b[1]; | |
1803 | readfd(f, b+1, 2); | |
1804 | num = IVAL(b, 0); | |
8a65e0ce | 1805 | } else |
351e23ad | 1806 | num = (UVAL(b,0)<<8) + UVAL(b,1) + *prev_ptr; |
8a65e0ce | 1807 | } else |
351e23ad | 1808 | num = UVAL(b, 0) + *prev_ptr; |
8a65e0ce WD |
1809 | *prev_ptr = num; |
1810 | if (prev_ptr == &prev_negative) | |
1811 | num = -num; | |
1812 | return num; | |
1813 | } | |
1814 | ||
67b8f3df WD |
1815 | /* Read a line of up to bufsiz-1 characters into buf. Strips |
1816 | * the (required) trailing newline and all carriage returns. | |
1817 | * Returns 1 for success; 0 for I/O error or truncation. */ | |
1818 | int read_line_old(int f, char *buf, size_t bufsiz) | |
f0fca04e | 1819 | { |
67b8f3df WD |
1820 | bufsiz--; /* leave room for the null */ |
1821 | while (bufsiz > 0) { | |
528bfcd7 | 1822 | buf[0] = 0; |
f0fca04e | 1823 | read_buf(f, buf, 1); |
914cc65c MP |
1824 | if (buf[0] == 0) |
1825 | return 0; | |
6ed6d7f5 | 1826 | if (buf[0] == '\n') |
f0fca04e | 1827 | break; |
f0fca04e AT |
1828 | if (buf[0] != '\r') { |
1829 | buf++; | |
67b8f3df | 1830 | bufsiz--; |
f0fca04e AT |
1831 | } |
1832 | } | |
6ed6d7f5 | 1833 | *buf = '\0'; |
67b8f3df | 1834 | return bufsiz > 0; |
f0fca04e AT |
1835 | } |
1836 | ||
f0fca04e AT |
1837 | void io_printf(int fd, const char *format, ...) |
1838 | { | |
d62bcc17 | 1839 | va_list ap; |
33544bf4 | 1840 | char buf[BIGPATHBUFLEN]; |
f0fca04e | 1841 | int len; |
3151cbae | 1842 | |
f0fca04e | 1843 | va_start(ap, format); |
3151cbae | 1844 | len = vsnprintf(buf, sizeof buf, format, ap); |
f0fca04e AT |
1845 | va_end(ap); |
1846 | ||
f89b9368 WD |
1847 | if (len < 0) |
1848 | exit_cleanup(RERR_STREAMIO); | |
f0fca04e | 1849 | |
33544bf4 WD |
1850 | if (len > (int)sizeof buf) { |
1851 | rprintf(FERROR, "io_printf() was too long for the buffer.\n"); | |
1852 | exit_cleanup(RERR_STREAMIO); | |
1853 | } | |
1854 | ||
f0fca04e AT |
1855 | write_sbuf(fd, buf); |
1856 | } | |
8d9dc9f9 | 1857 | |
d17e1dd2 | 1858 | /** Setup for multiplexing a MSG_* stream with the data stream. */ |
1f75bb10 | 1859 | void io_start_multiplex_out(void) |
8d9dc9f9 | 1860 | { |
d17e1dd2 | 1861 | io_flush(NORMAL_FLUSH); |
8ef246e0 | 1862 | io_start_buffering_out(sock_f_out); |
8d9dc9f9 AT |
1863 | io_multiplexing_out = 1; |
1864 | } | |
1865 | ||
d17e1dd2 | 1866 | /** Setup for multiplexing a MSG_* stream with the data stream. */ |
1f75bb10 | 1867 | void io_start_multiplex_in(void) |
8d9dc9f9 | 1868 | { |
d17e1dd2 | 1869 | io_flush(NORMAL_FLUSH); |
8ef246e0 | 1870 | io_start_buffering_in(sock_f_in); |
8d9dc9f9 AT |
1871 | io_multiplexing_in = 1; |
1872 | } | |
1873 | ||
d17e1dd2 | 1874 | /** Write an message to the multiplexed data stream. */ |
332cf6df | 1875 | int io_multiplex_write(enum msgcode code, const char *buf, size_t len, int convert) |
8d9dc9f9 | 1876 | { |
f89b9368 WD |
1877 | if (!io_multiplexing_out) |
1878 | return 0; | |
d17e1dd2 | 1879 | io_flush(NORMAL_FLUSH); |
1b7c47cb | 1880 | stats.total_written += (len+4); |
332cf6df | 1881 | mplex_write(sock_f_out, code, buf, len, convert); |
8d9dc9f9 AT |
1882 | return 1; |
1883 | } | |
1884 | ||
8ef246e0 | 1885 | void io_end_multiplex_in(void) |
7f459268 WD |
1886 | { |
1887 | io_multiplexing_in = 0; | |
8ef246e0 | 1888 | io_end_buffering_in(); |
7f459268 WD |
1889 | } |
1890 | ||
d17e1dd2 | 1891 | /** Stop output multiplexing. */ |
8ef246e0 | 1892 | void io_end_multiplex_out(void) |
554e0a8d AT |
1893 | { |
1894 | io_multiplexing_out = 0; | |
8ef246e0 | 1895 | io_end_buffering_out(); |
554e0a8d AT |
1896 | } |
1897 | ||
b9f592fb WD |
1898 | void start_write_batch(int fd) |
1899 | { | |
1900 | /* Some communication has already taken place, but we don't | |
1901 | * enable batch writing until here so that we can write a | |
1902 | * canonical record of the communication even though the | |
1903 | * actual communication so far depends on whether a daemon | |
1904 | * is involved. */ | |
1905 | write_int(batch_fd, protocol_version); | |
71456d30 WD |
1906 | if (protocol_version >= 30) |
1907 | write_byte(batch_fd, inc_recurse); | |
b9f592fb | 1908 | write_int(batch_fd, checksum_seed); |
b9f592fb WD |
1909 | |
1910 | if (am_sender) | |
1911 | write_batch_monitor_out = fd; | |
1912 | else | |
1913 | write_batch_monitor_in = fd; | |
1914 | } | |
1915 | ||
1916 | void stop_write_batch(void) | |
1917 | { | |
1918 | write_batch_monitor_out = -1; | |
1919 | write_batch_monitor_in = -1; | |
1920 | } |