Commit | Line | Data |
---|---|---|
0f78b815 WD |
1 | /* |
2 | * Socket and pipe I/O utilities used in rsync. | |
d62bcc17 | 3 | * |
0f78b815 WD |
4 | * Copyright (C) 1996-2001 Andrew Tridgell |
5 | * Copyright (C) 1996 Paul Mackerras | |
6 | * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org> | |
b3bf9b9d | 7 | * Copyright (C) 2003-2009 Wayne Davison |
d62bcc17 | 8 | * |
880da007 | 9 | * This program is free software; you can redistribute it and/or modify |
8e41b68e WD |
10 | * it under the terms of the GNU General Public License as published by |
11 | * the Free Software Foundation; either version 3 of the License, or | |
12 | * (at your option) any later version. | |
d62bcc17 | 13 | * |
880da007 MP |
14 | * This program is distributed in the hope that it will be useful, |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
d62bcc17 | 18 | * |
e7c67065 | 19 | * You should have received a copy of the GNU General Public License along |
4fd842f9 | 20 | * with this program; if not, visit the http://fsf.org website. |
880da007 | 21 | */ |
720b47f2 | 22 | |
0f78b815 WD |
23 | /* Rsync provides its own multiplexing system, which is used to send |
24 | * stderr and stdout over a single socket. | |
87ee2481 MP |
25 | * |
26 | * For historical reasons this is off during the start of the | |
27 | * connection, but it's switched on quite early using | |
0f78b815 | 28 | * io_start_multiplex_out() and io_start_multiplex_in(). */ |
720b47f2 | 29 | |
720b47f2 | 30 | #include "rsync.h" |
1b42f628 | 31 | #include "ifuncs.h" |
5dd14f0c | 32 | #include "inums.h" |
720b47f2 | 33 | |
880da007 | 34 | /** If no timeout is specified then use a 60 second select timeout */ |
8cd9fd4e AT |
35 | #define SELECT_TIMEOUT 60 |
36 | ||
7a55d06e | 37 | extern int bwlimit; |
71e58630 | 38 | extern size_t bwlimit_writemax; |
6ba9279f | 39 | extern int io_timeout; |
d17e1dd2 WD |
40 | extern int am_server; |
41 | extern int am_daemon; | |
42 | extern int am_sender; | |
98f8c9a5 | 43 | extern int am_generator; |
3ea6e0e7 | 44 | extern int inc_recurse; |
8ef246e0 | 45 | extern int io_error; |
e626b29e | 46 | extern int eol_nulls; |
8ef246e0 | 47 | extern int flist_eof; |
ce827c3e WD |
48 | extern int file_total; |
49 | extern int file_old_total; | |
7f9bf6b7 | 50 | extern int list_only; |
3b0a30eb | 51 | extern int read_batch; |
ba525f77 | 52 | extern int protect_args; |
b9f592fb WD |
53 | extern int checksum_seed; |
54 | extern int protocol_version; | |
47c11975 | 55 | extern int remove_source_files; |
cdf236aa | 56 | extern int preserve_hard_links; |
7a7810aa | 57 | extern BOOL extra_flist_sending_enabled; |
a800434a | 58 | extern struct stats stats; |
19531e1f | 59 | extern struct file_list *cur_flist; |
332cf6df | 60 | #ifdef ICONV_OPTION |
ba525f77 | 61 | extern int filesfrom_convert; |
332cf6df WD |
62 | extern iconv_t ic_send, ic_recv; |
63 | #endif | |
720b47f2 | 64 | |
93465f51 WD |
65 | int csum_length = SHORT_SUM_LENGTH; /* initial value */ |
66 | int allowed_lull = 0; | |
9e2409ab | 67 | int ignore_timeout = 0; |
b9f592fb | 68 | int batch_fd = -1; |
04c722d5 | 69 | int msgdone_cnt = 0; |
805edf9d | 70 | |
cb2e1f18 | 71 | /* Ignore an EOF error if non-zero. See whine_about_eof(). */ |
574c2500 | 72 | int kluge_around_eof = 0; |
7a55d06e | 73 | |
d17e1dd2 WD |
74 | int msg_fd_in = -1; |
75 | int msg_fd_out = -1; | |
cdf236aa WD |
76 | int sock_f_in = -1; |
77 | int sock_f_out = -1; | |
7a55d06e | 78 | |
8ef246e0 WD |
79 | static int iobuf_f_in = -1; |
80 | static char *iobuf_in; | |
81 | static size_t iobuf_in_siz; | |
82 | static size_t iobuf_in_ndx; | |
83 | static size_t iobuf_in_remaining; | |
84 | ||
85 | static int iobuf_f_out = -1; | |
86 | static char *iobuf_out; | |
87 | static int iobuf_out_cnt; | |
88 | ||
89 | int flist_forward_from = -1; | |
90 | ||
1f75bb10 WD |
91 | static int io_multiplexing_out; |
92 | static int io_multiplexing_in; | |
3b0a30eb WD |
93 | static time_t last_io_in; |
94 | static time_t last_io_out; | |
1f75bb10 WD |
95 | static int no_flush; |
96 | ||
b9f592fb WD |
97 | static int write_batch_monitor_in = -1; |
98 | static int write_batch_monitor_out = -1; | |
99 | ||
56014c8c WD |
100 | static int io_filesfrom_f_in = -1; |
101 | static int io_filesfrom_f_out = -1; | |
ba525f77 WD |
102 | static xbuf ff_buf = EMPTY_XBUF; |
103 | static char ff_lastchar; | |
332cf6df | 104 | #ifdef ICONV_OPTION |
ba525f77 | 105 | static xbuf iconv_buf = EMPTY_XBUF; |
332cf6df | 106 | #endif |
0b789446 | 107 | static int defer_forwarding_messages = 0, keep_defer_forwarding = 0; |
3b0a30eb | 108 | static int select_timeout = SELECT_TIMEOUT; |
d6081c82 WD |
109 | static int active_filecnt = 0; |
110 | static OFF_T active_bytecnt = 0; | |
7f9bf6b7 | 111 | static int first_message = 1; |
720b47f2 | 112 | |
351e23ad WD |
113 | static char int_byte_extra[64] = { |
114 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (00 - 3F)/4 */ | |
115 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (40 - 7F)/4 */ | |
116 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* (80 - BF)/4 */ | |
117 | 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 5, 6, /* (C0 - FF)/4 */ | |
482f48cc WD |
118 | }; |
119 | ||
7f9bf6b7 WD |
120 | #define REMOTE_OPTION_ERROR "rsync: on remote machine: -" |
121 | #define REMOTE_OPTION_ERROR2 ": unknown option" | |
122 | ||
29349024 WD |
123 | enum festatus { FES_SUCCESS, FES_REDO, FES_NO_SEND }; |
124 | ||
dde5b772 | 125 | static void readfd(int fd, char *buffer, size_t N); |
8ef246e0 WD |
126 | static void writefd(int fd, const char *buf, size_t len); |
127 | static void writefd_unbuffered(int fd, const char *buf, size_t len); | |
332cf6df | 128 | static void mplex_write(int fd, enum msgcode code, const char *buf, size_t len, int convert); |
d8587b46 | 129 | static void read_a_msg(int fd); |
ff41a59f | 130 | |
e0c572c5 | 131 | static flist_ndx_list redo_list, hlink_list; |
d17e1dd2 | 132 | |
08c88178 WD |
133 | struct msg_list_item { |
134 | struct msg_list_item *next; | |
332cf6df | 135 | char convert; |
954bbed8 | 136 | char buf[1]; |
d17e1dd2 WD |
137 | }; |
138 | ||
08c88178 WD |
139 | struct msg_list { |
140 | struct msg_list_item *head, *tail; | |
141 | }; | |
142 | ||
e4c877cf | 143 | static struct msg_list msg_queue; |
d17e1dd2 | 144 | |
29349024 WD |
145 | static void got_flist_entry_status(enum festatus status, const char *buf) |
146 | { | |
147 | int ndx = IVAL(buf, 0); | |
e982d591 | 148 | struct file_list *flist = flist_for_ndx(ndx, "got_flist_entry_status"); |
29349024 WD |
149 | |
150 | if (remove_source_files) { | |
151 | active_filecnt--; | |
152 | active_bytecnt -= F_LENGTH(flist->files[ndx - flist->ndx_start]); | |
153 | } | |
154 | ||
155 | if (inc_recurse) | |
156 | flist->in_progress--; | |
157 | ||
158 | switch (status) { | |
159 | case FES_SUCCESS: | |
160 | if (remove_source_files) | |
161 | send_msg(MSG_SUCCESS, buf, 4, 0); | |
162 | if (preserve_hard_links) { | |
163 | struct file_struct *file = flist->files[ndx - flist->ndx_start]; | |
37ce1679 | 164 | if (F_IS_HLINKED(file)) { |
29349024 | 165 | flist_ndx_push(&hlink_list, ndx); |
37ce1679 WD |
166 | flist->in_progress++; |
167 | } | |
29349024 WD |
168 | } |
169 | break; | |
170 | case FES_REDO: | |
8ab02ccd WD |
171 | if (read_batch) { |
172 | if (inc_recurse) | |
173 | flist->in_progress++; | |
174 | break; | |
175 | } | |
29349024 WD |
176 | if (inc_recurse) |
177 | flist->to_redo++; | |
178 | flist_ndx_push(&redo_list, ndx); | |
179 | break; | |
180 | case FES_NO_SEND: | |
181 | break; | |
182 | } | |
183 | } | |
184 | ||
8d9dc9f9 AT |
185 | static void check_timeout(void) |
186 | { | |
187 | time_t t; | |
90ba34e2 | 188 | |
9e2409ab | 189 | if (!io_timeout || ignore_timeout) |
d17e1dd2 | 190 | return; |
8d9dc9f9 | 191 | |
3b0a30eb WD |
192 | if (!last_io_in) { |
193 | last_io_in = time(NULL); | |
8d9dc9f9 AT |
194 | return; |
195 | } | |
196 | ||
197 | t = time(NULL); | |
198 | ||
3b0a30eb | 199 | if (t - last_io_in >= io_timeout) { |
0adb99b9 | 200 | if (!am_server && !am_daemon) { |
4ccfd96c | 201 | rprintf(FERROR, "io timeout after %d seconds -- exiting\n", |
3b0a30eb | 202 | (int)(t-last_io_in)); |
0adb99b9 | 203 | } |
65417579 | 204 | exit_cleanup(RERR_TIMEOUT); |
8d9dc9f9 AT |
205 | } |
206 | } | |
207 | ||
1f75bb10 WD |
208 | /* Note the fds used for the main socket (which might really be a pipe |
209 | * for a local transfer, but we can ignore that). */ | |
210 | void io_set_sock_fds(int f_in, int f_out) | |
211 | { | |
212 | sock_f_in = f_in; | |
213 | sock_f_out = f_out; | |
214 | } | |
215 | ||
3b0a30eb WD |
216 | void set_io_timeout(int secs) |
217 | { | |
218 | io_timeout = secs; | |
219 | ||
220 | if (!io_timeout || io_timeout > SELECT_TIMEOUT) | |
221 | select_timeout = SELECT_TIMEOUT; | |
222 | else | |
223 | select_timeout = io_timeout; | |
224 | ||
225 | allowed_lull = read_batch ? 0 : (io_timeout + 1) / 2; | |
226 | } | |
227 | ||
98f8c9a5 WD |
228 | /* Setup the fd used to receive MSG_* messages. Only needed during the |
229 | * early stages of being a local sender (up through the sending of the | |
230 | * file list) or when we're the generator (to fetch the messages from | |
231 | * the receiver). */ | |
d17e1dd2 WD |
232 | void set_msg_fd_in(int fd) |
233 | { | |
234 | msg_fd_in = fd; | |
235 | } | |
236 | ||
98f8c9a5 WD |
237 | /* Setup the fd used to send our MSG_* messages. Only needed when |
238 | * we're the receiver (to send our messages to the generator). */ | |
d17e1dd2 WD |
239 | void set_msg_fd_out(int fd) |
240 | { | |
241 | msg_fd_out = fd; | |
242 | set_nonblocking(msg_fd_out); | |
243 | } | |
244 | ||
245 | /* Add a message to the pending MSG_* list. */ | |
332cf6df | 246 | static void msg_list_add(struct msg_list *lst, int code, const char *buf, int len, int convert) |
554e0a8d | 247 | { |
954bbed8 WD |
248 | struct msg_list_item *m; |
249 | int sz = len + 4 + sizeof m[0] - 1; | |
d17e1dd2 | 250 | |
954bbed8 | 251 | if (!(m = (struct msg_list_item *)new_array(char, sz))) |
c6816b94 | 252 | out_of_memory("msg_list_add"); |
954bbed8 | 253 | m->next = NULL; |
332cf6df | 254 | m->convert = convert; |
954bbed8 WD |
255 | SIVAL(m->buf, 0, ((code+MPLEX_BASE)<<24) | len); |
256 | memcpy(m->buf + 4, buf, len); | |
257 | if (lst->tail) | |
258 | lst->tail->next = m; | |
d17e1dd2 | 259 | else |
954bbed8 WD |
260 | lst->head = m; |
261 | lst->tail = m; | |
554e0a8d AT |
262 | } |
263 | ||
0b789446 WD |
264 | static inline int flush_a_msg(int fd) |
265 | { | |
266 | struct msg_list_item *m = msg_queue.head; | |
267 | int len = IVAL(m->buf, 0) & 0xFFFFFF; | |
268 | int tag = *((uchar*)m->buf+3) - MPLEX_BASE; | |
269 | ||
270 | if (!(msg_queue.head = m->next)) | |
271 | msg_queue.tail = NULL; | |
272 | ||
273 | defer_forwarding_messages++; | |
274 | mplex_write(fd, tag, m->buf + 4, len, m->convert); | |
275 | defer_forwarding_messages--; | |
276 | ||
277 | free(m); | |
278 | ||
279 | return len; | |
280 | } | |
281 | ||
e4c877cf | 282 | static void msg_flush(void) |
3be97bf9 | 283 | { |
e4c877cf | 284 | if (am_generator) { |
0b789446 WD |
285 | while (msg_queue.head && io_multiplexing_out) |
286 | stats.total_written += flush_a_msg(sock_f_out) + 4; | |
e4c877cf | 287 | } else { |
0b789446 WD |
288 | while (msg_queue.head) |
289 | (void)flush_a_msg(msg_fd_out); | |
3be97bf9 WD |
290 | } |
291 | } | |
292 | ||
7f9bf6b7 WD |
293 | static void check_for_d_option_error(const char *msg) |
294 | { | |
295 | static char rsync263_opts[] = "BCDHIKLPRSTWabceghlnopqrtuvxz"; | |
296 | char *colon; | |
297 | int saw_d = 0; | |
298 | ||
299 | if (*msg != 'r' | |
300 | || strncmp(msg, REMOTE_OPTION_ERROR, sizeof REMOTE_OPTION_ERROR - 1) != 0) | |
301 | return; | |
302 | ||
303 | msg += sizeof REMOTE_OPTION_ERROR - 1; | |
304 | if (*msg == '-' || (colon = strchr(msg, ':')) == NULL | |
305 | || strncmp(colon, REMOTE_OPTION_ERROR2, sizeof REMOTE_OPTION_ERROR2 - 1) != 0) | |
306 | return; | |
307 | ||
308 | for ( ; *msg != ':'; msg++) { | |
309 | if (*msg == 'd') | |
310 | saw_d = 1; | |
311 | else if (*msg == 'e') | |
312 | break; | |
313 | else if (strchr(rsync263_opts, *msg) == NULL) | |
314 | return; | |
315 | } | |
316 | ||
317 | if (saw_d) { | |
318 | rprintf(FWARNING, | |
73cb6738 | 319 | "*** Try using \"--old-d\" if remote rsync is <= 2.6.3 ***\n"); |
7f9bf6b7 WD |
320 | } |
321 | } | |
322 | ||
d6081c82 | 323 | /* This is used by the generator to limit how many file transfers can |
47c11975 | 324 | * be active at once when --remove-source-files is specified. Without |
d6081c82 WD |
325 | * this, sender-side deletions were mostly happening at the end. */ |
326 | void increment_active_files(int ndx, int itemizing, enum logcode code) | |
327 | { | |
b4de848d WD |
328 | while (1) { |
329 | /* TODO: tune these limits? */ | |
330 | int limit = active_bytecnt >= 128*1024 ? 10 : 50; | |
331 | if (active_filecnt < limit) | |
332 | break; | |
04c722d5 | 333 | check_for_finished_files(itemizing, code, 0); |
b4de848d WD |
334 | if (active_filecnt < limit) |
335 | break; | |
04c722d5 WD |
336 | if (iobuf_out_cnt) |
337 | io_flush(NORMAL_FLUSH); | |
338 | else | |
d8587b46 | 339 | read_a_msg(msg_fd_in); |
d6081c82 WD |
340 | } |
341 | ||
342 | active_filecnt++; | |
121bfb2b | 343 | active_bytecnt += F_LENGTH(cur_flist->files[ndx - cur_flist->ndx_start]); |
d6081c82 WD |
344 | } |
345 | ||
3be97bf9 | 346 | /* Write an message to a multiplexed stream. If this fails, rsync exits. */ |
332cf6df | 347 | static void mplex_write(int fd, enum msgcode code, const char *buf, size_t len, int convert) |
d17e1dd2 | 348 | { |
332cf6df | 349 | char buffer[BIGPATHBUFLEN]; /* Oversized for use by iconv code. */ |
3be97bf9 | 350 | size_t n = len; |
d17e1dd2 | 351 | |
332cf6df | 352 | #ifdef ICONV_OPTION |
ee6e80c7 WD |
353 | /* We need to convert buf before doing anything else so that we |
354 | * can include the (converted) byte length in the message header. */ | |
355 | if (convert && ic_send != (iconv_t)-1) { | |
356 | xbuf outbuf, inbuf; | |
357 | ||
358 | INIT_XBUF(outbuf, buffer + 4, 0, sizeof buffer - 4); | |
bb640d32 | 359 | INIT_XBUF(inbuf, (char*)buf, len, (size_t)-1); |
332cf6df | 360 | |
ee6e80c7 WD |
361 | iconvbufs(ic_send, &inbuf, &outbuf, |
362 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE); | |
363 | if (inbuf.len > 0) { | |
364 | rprintf(FERROR, "overflowed conversion buffer in mplex_write"); | |
365 | exit_cleanup(RERR_UNSUPPORTED); | |
366 | } | |
367 | ||
368 | n = len = outbuf.len; | |
369 | } else | |
370 | #endif | |
371 | if (n > 1024 - 4) /* BIGPATHBUFLEN can handle 1024 bytes */ | |
372 | n = 0; /* We'd rather do 2 writes than too much memcpy(). */ | |
3be97bf9 WD |
373 | else |
374 | memcpy(buffer + 4, buf, n); | |
375 | ||
ee6e80c7 WD |
376 | SIVAL(buffer, 0, ((MPLEX_BASE + (int)code)<<24) + len); |
377 | ||
0b789446 | 378 | keep_defer_forwarding++; /* defer_forwarding_messages++ on return */ |
3be97bf9 | 379 | writefd_unbuffered(fd, buffer, n+4); |
0b789446 | 380 | keep_defer_forwarding--; |
3be97bf9 | 381 | |
ee6e80c7 WD |
382 | if (len > n) |
383 | writefd_unbuffered(fd, buf+n, len-n); | |
17a4977b WD |
384 | |
385 | if (!--defer_forwarding_messages && !no_flush) | |
386 | msg_flush(); | |
d17e1dd2 WD |
387 | } |
388 | ||
332cf6df | 389 | int send_msg(enum msgcode code, const char *buf, int len, int convert) |
37f35d89 WD |
390 | { |
391 | if (msg_fd_out < 0) { | |
12ccc73a | 392 | if (!defer_forwarding_messages) |
332cf6df | 393 | return io_multiplex_write(code, buf, len, convert); |
12ccc73a WD |
394 | if (!io_multiplexing_out) |
395 | return 0; | |
332cf6df | 396 | msg_list_add(&msg_queue, code, buf, len, convert); |
12ccc73a | 397 | return 1; |
37f35d89 | 398 | } |
d8587b46 | 399 | if (defer_forwarding_messages) |
332cf6df | 400 | msg_list_add(&msg_queue, code, buf, len, convert); |
e4c877cf | 401 | else |
332cf6df | 402 | mplex_write(msg_fd_out, code, buf, len, convert); |
12ccc73a | 403 | return 1; |
37f35d89 WD |
404 | } |
405 | ||
155d9206 WD |
406 | void send_msg_int(enum msgcode code, int num) |
407 | { | |
408 | char numbuf[4]; | |
409 | SIVAL(numbuf, 0, num); | |
332cf6df | 410 | send_msg(code, numbuf, 4, 0); |
155d9206 WD |
411 | } |
412 | ||
8ef246e0 | 413 | void wait_for_receiver(void) |
d17e1dd2 | 414 | { |
0b789446 WD |
415 | if (io_flush(FULL_FLUSH)) |
416 | return; | |
d8587b46 | 417 | read_a_msg(msg_fd_in); |
8ef246e0 | 418 | } |
554e0a8d | 419 | |
8ef246e0 WD |
420 | int get_redo_num(void) |
421 | { | |
c6816b94 | 422 | return flist_ndx_pop(&redo_list); |
554e0a8d AT |
423 | } |
424 | ||
cdf236aa WD |
425 | int get_hlink_num(void) |
426 | { | |
427 | return flist_ndx_pop(&hlink_list); | |
428 | } | |
429 | ||
56014c8c WD |
430 | /** |
431 | * When we're the receiver and we have a local --files-from list of names | |
432 | * that needs to be sent over the socket to the sender, we have to do two | |
433 | * things at the same time: send the sender a list of what files we're | |
434 | * processing and read the incoming file+info list from the sender. We do | |
435 | * this by augmenting the read_timeout() function to copy this data. It | |
ba525f77 WD |
436 | * uses ff_buf to read a block of data from f_in (when it is ready, since |
437 | * it might be a pipe) and then blast it out f_out (when it is ready to | |
438 | * receive more data). | |
56014c8c WD |
439 | */ |
440 | void io_set_filesfrom_fds(int f_in, int f_out) | |
441 | { | |
442 | io_filesfrom_f_in = f_in; | |
443 | io_filesfrom_f_out = f_out; | |
ba525f77 WD |
444 | alloc_xbuf(&ff_buf, 2048); |
445 | #ifdef ICONV_OPTION | |
446 | if (protect_args) | |
447 | alloc_xbuf(&iconv_buf, 1024); | |
448 | #endif | |
56014c8c | 449 | } |
720b47f2 | 450 | |
cb2e1f18 WD |
451 | /* It's almost always an error to get an EOF when we're trying to read from the |
452 | * network, because the protocol is (for the most part) self-terminating. | |
880da007 | 453 | * |
cb2e1f18 WD |
454 | * There is one case for the receiver when it is at the end of the transfer |
455 | * (hanging around reading any keep-alive packets that might come its way): if | |
456 | * the sender dies before the generator's kill-signal comes through, we can end | |
457 | * up here needing to loop until the kill-signal arrives. In this situation, | |
458 | * kluge_around_eof will be < 0. | |
459 | * | |
460 | * There is another case for older protocol versions (< 24) where the module | |
461 | * listing was not terminated, so we must ignore an EOF error in that case and | |
462 | * exit. In this situation, kluge_around_eof will be > 0. */ | |
1f75bb10 | 463 | static void whine_about_eof(int fd) |
7a55d06e | 464 | { |
574c2500 | 465 | if (kluge_around_eof && fd == sock_f_in) { |
55bb7fff | 466 | int i; |
574c2500 WD |
467 | if (kluge_around_eof > 0) |
468 | exit_cleanup(0); | |
55bb7fff WD |
469 | /* If we're still here after 10 seconds, exit with an error. */ |
470 | for (i = 10*1000/20; i--; ) | |
574c2500 WD |
471 | msleep(20); |
472 | } | |
3151cbae | 473 | |
00bdf899 | 474 | rprintf(FERROR, RSYNC_NAME ": connection unexpectedly closed " |
6d56efa6 | 475 | "(%s bytes received so far) [%s]\n", |
adc2476f | 476 | big_num(stats.total_read), who_am_i()); |
00bdf899 WD |
477 | |
478 | exit_cleanup(RERR_STREAMIO); | |
7a55d06e | 479 | } |
720b47f2 | 480 | |
d8587b46 | 481 | /* Read from a socket with I/O timeout. return the number of bytes |
c3563c46 MP |
482 | * read. If no bytes can be read then exit, never return a number <= 0. |
483 | * | |
8886f8d0 MP |
484 | * TODO: If the remote shell connection fails, then current versions |
485 | * actually report an "unexpected EOF" error here. Since it's a | |
486 | * fairly common mistake to try to use rsh when ssh is required, we | |
487 | * should trap that: if we fail to read any data at all, we should | |
488 | * give a better explanation. We can tell whether the connection has | |
d8587b46 | 489 | * started by looking e.g. at whether the remote version is known yet. */ |
3151cbae | 490 | static int read_timeout(int fd, char *buf, size_t len) |
8d9dc9f9 | 491 | { |
d8aeda1e | 492 | int n, cnt = 0; |
4c36ddbe | 493 | |
dde5b772 | 494 | io_flush(FULL_FLUSH); |
ea2111d1 | 495 | |
d8aeda1e | 496 | while (cnt == 0) { |
7a55d06e | 497 | /* until we manage to read *something* */ |
56014c8c | 498 | fd_set r_fds, w_fds; |
4c36ddbe | 499 | struct timeval tv; |
1ea087a7 | 500 | int maxfd = fd; |
a57873b7 | 501 | int count; |
4c36ddbe | 502 | |
56014c8c | 503 | FD_ZERO(&r_fds); |
a7026ba9 | 504 | FD_ZERO(&w_fds); |
56014c8c | 505 | FD_SET(fd, &r_fds); |
3309507d | 506 | if (io_filesfrom_f_out >= 0) { |
56014c8c | 507 | int new_fd; |
ba525f77 | 508 | if (ff_buf.len == 0) { |
3309507d | 509 | if (io_filesfrom_f_in >= 0) { |
56014c8c WD |
510 | FD_SET(io_filesfrom_f_in, &r_fds); |
511 | new_fd = io_filesfrom_f_in; | |
512 | } else { | |
513 | io_filesfrom_f_out = -1; | |
514 | new_fd = -1; | |
515 | } | |
516 | } else { | |
56014c8c WD |
517 | FD_SET(io_filesfrom_f_out, &w_fds); |
518 | new_fd = io_filesfrom_f_out; | |
519 | } | |
1ea087a7 WD |
520 | if (new_fd > maxfd) |
521 | maxfd = new_fd; | |
554e0a8d AT |
522 | } |
523 | ||
7a7810aa WD |
524 | if (extra_flist_sending_enabled && !defer_forwarding_messages) { |
525 | if (file_total - file_old_total < MAX_FILECNT_LOOKAHEAD | |
526 | && file_total - file_old_total >= MIN_FILECNT_LOOKAHEAD) | |
527 | tv.tv_sec = 0; | |
528 | else { | |
529 | extra_flist_sending_enabled = False; | |
530 | tv.tv_sec = select_timeout; | |
531 | } | |
532 | } else | |
ce827c3e | 533 | tv.tv_sec = select_timeout; |
4c36ddbe AT |
534 | tv.tv_usec = 0; |
535 | ||
554e0a8d AT |
536 | errno = 0; |
537 | ||
a7026ba9 | 538 | count = select(maxfd + 1, &r_fds, &w_fds, NULL, &tv); |
a57873b7 | 539 | |
a57873b7 | 540 | if (count <= 0) { |
2a5df862 WD |
541 | if (errno == EBADF) { |
542 | defer_forwarding_messages = 0; | |
554e0a8d | 543 | exit_cleanup(RERR_SOCKETIO); |
2a5df862 | 544 | } |
7a7810aa WD |
545 | if (extra_flist_sending_enabled && !defer_forwarding_messages) { |
546 | extra_flist_sending_enabled = False; | |
ce827c3e | 547 | send_extra_file_list(sock_f_out, -1); |
7a7810aa WD |
548 | extra_flist_sending_enabled = !flist_eof; |
549 | } else | |
ce827c3e | 550 | check_timeout(); |
4c36ddbe AT |
551 | continue; |
552 | } | |
553 | ||
3309507d | 554 | if (io_filesfrom_f_out >= 0) { |
ba525f77 | 555 | if (ff_buf.len) { |
56014c8c WD |
556 | if (FD_ISSET(io_filesfrom_f_out, &w_fds)) { |
557 | int l = write(io_filesfrom_f_out, | |
ba525f77 WD |
558 | ff_buf.buf + ff_buf.pos, |
559 | ff_buf.len); | |
56014c8c | 560 | if (l > 0) { |
ba525f77 WD |
561 | if (!(ff_buf.len -= l)) |
562 | ff_buf.pos = 0; | |
56014c8c | 563 | else |
ba525f77 | 564 | ff_buf.pos += l; |
47cffb77 | 565 | } else if (errno != EINTR) { |
56014c8c WD |
566 | /* XXX should we complain? */ |
567 | io_filesfrom_f_out = -1; | |
568 | } | |
569 | } | |
3309507d | 570 | } else if (io_filesfrom_f_in >= 0) { |
56014c8c | 571 | if (FD_ISSET(io_filesfrom_f_in, &r_fds)) { |
22955408 | 572 | #ifdef ICONV_OPTION |
ba525f77 | 573 | xbuf *ibuf = filesfrom_convert ? &iconv_buf : &ff_buf; |
22955408 WD |
574 | #else |
575 | xbuf *ibuf = &ff_buf; | |
576 | #endif | |
ba525f77 | 577 | int l = read(io_filesfrom_f_in, ibuf->buf, ibuf->size); |
56014c8c | 578 | if (l <= 0) { |
47cffb77 WD |
579 | if (l == 0 || errno != EINTR) { |
580 | /* Send end-of-file marker */ | |
ba525f77 WD |
581 | memcpy(ff_buf.buf, "\0\0", 2); |
582 | ff_buf.len = ff_lastchar? 2 : 1; | |
583 | ff_buf.pos = 0; | |
47cffb77 WD |
584 | io_filesfrom_f_in = -1; |
585 | } | |
56014c8c | 586 | } else { |
22955408 | 587 | #ifdef ICONV_OPTION |
ba525f77 WD |
588 | if (filesfrom_convert) { |
589 | iconv_buf.pos = 0; | |
590 | iconv_buf.len = l; | |
591 | iconvbufs(ic_send, &iconv_buf, &ff_buf, | |
592 | ICB_EXPAND_OUT|ICB_INCLUDE_BAD|ICB_INCLUDE_INCOMPLETE); | |
593 | l = ff_buf.len; | |
594 | } | |
22955408 | 595 | #endif |
56014c8c | 596 | if (!eol_nulls) { |
ba525f77 | 597 | char *s = ff_buf.buf + l; |
56014c8c | 598 | /* Transform CR and/or LF into '\0' */ |
ba525f77 | 599 | while (s-- > ff_buf.buf) { |
56014c8c WD |
600 | if (*s == '\n' || *s == '\r') |
601 | *s = '\0'; | |
602 | } | |
603 | } | |
ba525f77 | 604 | if (!ff_lastchar) { |
56014c8c WD |
605 | /* Last buf ended with a '\0', so don't |
606 | * let this buf start with one. */ | |
ba525f77 WD |
607 | while (l && ff_buf.buf[ff_buf.pos] == '\0') |
608 | ff_buf.pos++, l--; | |
56014c8c WD |
609 | } |
610 | if (!l) | |
ba525f77 | 611 | ff_buf.pos = 0; |
56014c8c | 612 | else { |
ba525f77 | 613 | char *f = ff_buf.buf + ff_buf.pos; |
56014c8c WD |
614 | char *t = f; |
615 | char *eob = f + l; | |
616 | /* Eliminate any multi-'\0' runs. */ | |
617 | while (f != eob) { | |
618 | if (!(*t++ = *f++)) { | |
619 | while (f != eob && !*f) | |
620 | f++, l--; | |
621 | } | |
622 | } | |
ba525f77 | 623 | ff_lastchar = f[-1]; |
56014c8c | 624 | } |
ba525f77 | 625 | ff_buf.len = l; |
56014c8c WD |
626 | } |
627 | } | |
628 | } | |
629 | } | |
630 | ||
f89b9368 WD |
631 | if (!FD_ISSET(fd, &r_fds)) |
632 | continue; | |
554e0a8d | 633 | |
4c36ddbe AT |
634 | n = read(fd, buf, len); |
635 | ||
1ea087a7 WD |
636 | if (n <= 0) { |
637 | if (n == 0) | |
1f75bb10 | 638 | whine_about_eof(fd); /* Doesn't return. */ |
41000dff | 639 | if (errno == EINTR || errno == EWOULDBLOCK || errno == EAGAIN) |
7a55d06e | 640 | continue; |
1f75bb10 WD |
641 | |
642 | /* Don't write errors on a dead socket. */ | |
72f2d1b3 | 643 | if (fd == sock_f_in) { |
41000dff WD |
644 | if (am_sender) |
645 | io_multiplexing_out = 0; | |
3f0211b6 | 646 | rsyserr(FERROR_SOCKET, errno, "read error"); |
72f2d1b3 WD |
647 | } else |
648 | rsyserr(FERROR, errno, "read error"); | |
1f75bb10 | 649 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 | 650 | } |
00bdf899 WD |
651 | |
652 | buf += n; | |
653 | len -= n; | |
d8aeda1e | 654 | cnt += n; |
1f75bb10 | 655 | |
3b0a30eb WD |
656 | if (fd == sock_f_in && io_timeout) |
657 | last_io_in = time(NULL); | |
4c36ddbe | 658 | } |
8d9dc9f9 | 659 | |
d8aeda1e | 660 | return cnt; |
4c36ddbe | 661 | } |
8d9dc9f9 | 662 | |
67b8f3df | 663 | /* Read a line into the "buf" buffer. */ |
ba525f77 | 664 | int read_line(int fd, char *buf, size_t bufsiz, int flags) |
56014c8c | 665 | { |
ba525f77 | 666 | char ch, *s, *eob; |
56014c8c | 667 | int cnt; |
56014c8c | 668 | |
ba525f77 WD |
669 | #ifdef ICONV_OPTION |
670 | if (flags & RL_CONVERT && iconv_buf.size < bufsiz) | |
671 | realloc_xbuf(&iconv_buf, bufsiz + 1024); | |
672 | #endif | |
673 | ||
56014c8c | 674 | start: |
22955408 | 675 | #ifdef ICONV_OPTION |
ba525f77 | 676 | s = flags & RL_CONVERT ? iconv_buf.buf : buf; |
22955408 WD |
677 | #else |
678 | s = buf; | |
679 | #endif | |
ba525f77 | 680 | eob = s + bufsiz - 1; |
56014c8c WD |
681 | while (1) { |
682 | cnt = read(fd, &ch, 1); | |
683 | if (cnt < 0 && (errno == EWOULDBLOCK | |
684 | || errno == EINTR || errno == EAGAIN)) { | |
685 | struct timeval tv; | |
6c850772 WD |
686 | fd_set r_fds, e_fds; |
687 | FD_ZERO(&r_fds); | |
688 | FD_SET(fd, &r_fds); | |
689 | FD_ZERO(&e_fds); | |
690 | FD_SET(fd, &e_fds); | |
e626b29e | 691 | tv.tv_sec = select_timeout; |
56014c8c | 692 | tv.tv_usec = 0; |
6c850772 | 693 | if (!select(fd+1, &r_fds, NULL, &e_fds, &tv)) |
56014c8c | 694 | check_timeout(); |
35c8fd76 WD |
695 | /*if (FD_ISSET(fd, &e_fds)) |
696 | rprintf(FINFO, "select exception on fd %d\n", fd); */ | |
56014c8c WD |
697 | continue; |
698 | } | |
699 | if (cnt != 1) | |
700 | break; | |
ba525f77 | 701 | if (flags & RL_EOL_NULLS ? ch == '\0' : (ch == '\r' || ch == '\n')) { |
67b8f3df | 702 | /* Skip empty lines if dumping comments. */ |
ba525f77 | 703 | if (flags & RL_DUMP_COMMENTS && s == buf) |
56014c8c WD |
704 | continue; |
705 | break; | |
706 | } | |
707 | if (s < eob) | |
708 | *s++ = ch; | |
709 | } | |
710 | *s = '\0'; | |
7a55d06e | 711 | |
ba525f77 | 712 | if (flags & RL_DUMP_COMMENTS && (*buf == '#' || *buf == ';')) |
56014c8c WD |
713 | goto start; |
714 | ||
ba525f77 WD |
715 | #ifdef ICONV_OPTION |
716 | if (flags & RL_CONVERT) { | |
717 | xbuf outbuf; | |
718 | INIT_XBUF(outbuf, buf, 0, bufsiz); | |
719 | iconv_buf.pos = 0; | |
720 | iconv_buf.len = s - iconv_buf.buf; | |
721 | iconvbufs(ic_recv, &iconv_buf, &outbuf, | |
722 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE); | |
723 | outbuf.buf[outbuf.len] = '\0'; | |
724 | return outbuf.len; | |
725 | } | |
726 | #endif | |
727 | ||
67b8f3df WD |
728 | return s - buf; |
729 | } | |
730 | ||
53936ef9 WD |
731 | void read_args(int f_in, char *mod_name, char *buf, size_t bufsiz, int rl_nulls, |
732 | char ***argv_p, int *argc_p, char **request_p) | |
67b8f3df WD |
733 | { |
734 | int maxargs = MAX_ARGS; | |
735 | int dot_pos = 0; | |
736 | int argc = 0; | |
737 | char **argv, *p; | |
22955408 WD |
738 | int rl_flags = (rl_nulls ? RL_EOL_NULLS : 0); |
739 | ||
740 | #ifdef ICONV_OPTION | |
741 | rl_flags |= (protect_args && ic_recv != (iconv_t)-1 ? RL_CONVERT : 0); | |
742 | #endif | |
67b8f3df WD |
743 | |
744 | if (!(argv = new_array(char *, maxargs))) | |
745 | out_of_memory("read_args"); | |
53936ef9 | 746 | if (mod_name && !protect_args) |
67b8f3df WD |
747 | argv[argc++] = "rsyncd"; |
748 | ||
749 | while (1) { | |
ba525f77 | 750 | if (read_line(f_in, buf, bufsiz, rl_flags) == 0) |
67b8f3df WD |
751 | break; |
752 | ||
53936ef9 | 753 | if (argc == maxargs-1) { |
67b8f3df WD |
754 | maxargs += MAX_ARGS; |
755 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
756 | out_of_memory("read_args"); | |
757 | } | |
758 | ||
759 | if (dot_pos) { | |
760 | if (request_p) { | |
761 | *request_p = strdup(buf); | |
762 | request_p = NULL; | |
763 | } | |
764 | if (mod_name) | |
765 | glob_expand_module(mod_name, buf, &argv, &argc, &maxargs); | |
766 | else | |
767 | glob_expand(buf, &argv, &argc, &maxargs); | |
768 | } else { | |
769 | if (!(p = strdup(buf))) | |
770 | out_of_memory("read_args"); | |
771 | argv[argc++] = p; | |
772 | if (*p == '.' && p[1] == '\0') | |
773 | dot_pos = argc; | |
774 | } | |
775 | } | |
53936ef9 | 776 | argv[argc] = NULL; |
67b8f3df | 777 | |
987a5467 WD |
778 | glob_expand(NULL, NULL, NULL, NULL); |
779 | ||
67b8f3df WD |
780 | *argc_p = argc; |
781 | *argv_p = argv; | |
56014c8c | 782 | } |
7a55d06e | 783 | |
8ef246e0 | 784 | int io_start_buffering_out(int f_out) |
1f75bb10 | 785 | { |
8ef246e0 WD |
786 | if (iobuf_out) { |
787 | assert(f_out == iobuf_f_out); | |
788 | return 0; | |
789 | } | |
1f75bb10 WD |
790 | if (!(iobuf_out = new_array(char, IO_BUFFER_SIZE))) |
791 | out_of_memory("io_start_buffering_out"); | |
792 | iobuf_out_cnt = 0; | |
8ef246e0 WD |
793 | iobuf_f_out = f_out; |
794 | return 1; | |
1f75bb10 WD |
795 | } |
796 | ||
8ef246e0 | 797 | int io_start_buffering_in(int f_in) |
1f75bb10 | 798 | { |
8ef246e0 WD |
799 | if (iobuf_in) { |
800 | assert(f_in == iobuf_f_in); | |
801 | return 0; | |
802 | } | |
1f75bb10 WD |
803 | iobuf_in_siz = 2 * IO_BUFFER_SIZE; |
804 | if (!(iobuf_in = new_array(char, iobuf_in_siz))) | |
805 | out_of_memory("io_start_buffering_in"); | |
8ef246e0 WD |
806 | iobuf_f_in = f_in; |
807 | return 1; | |
1f75bb10 WD |
808 | } |
809 | ||
8ef246e0 | 810 | void io_end_buffering_in(void) |
1f75bb10 | 811 | { |
8ef246e0 WD |
812 | if (!iobuf_in) |
813 | return; | |
814 | free(iobuf_in); | |
815 | iobuf_in = NULL; | |
816 | iobuf_in_ndx = 0; | |
817 | iobuf_in_remaining = 0; | |
818 | iobuf_f_in = -1; | |
819 | } | |
820 | ||
821 | void io_end_buffering_out(void) | |
822 | { | |
823 | if (!iobuf_out) | |
824 | return; | |
825 | io_flush(FULL_FLUSH); | |
826 | free(iobuf_out); | |
827 | iobuf_out = NULL; | |
828 | iobuf_f_out = -1; | |
1f75bb10 WD |
829 | } |
830 | ||
be91bd81 | 831 | void maybe_flush_socket(int important) |
626bec8e | 832 | { |
be91bd81 WD |
833 | if (iobuf_out && iobuf_out_cnt |
834 | && (important || time(NULL) - last_io_out >= 5)) | |
626bec8e WD |
835 | io_flush(NORMAL_FLUSH); |
836 | } | |
837 | ||
cdf236aa | 838 | void maybe_send_keepalive(void) |
9e2409ab | 839 | { |
3b0a30eb | 840 | if (time(NULL) - last_io_out >= allowed_lull) { |
9e2409ab | 841 | if (!iobuf_out || !iobuf_out_cnt) { |
3221f451 WD |
842 | if (protocol_version < 29) |
843 | return; /* there's nothing we can do */ | |
8ef246e0 | 844 | if (protocol_version >= 30) |
332cf6df | 845 | send_msg(MSG_NOOP, "", 0, 0); |
8ef246e0 | 846 | else { |
9decb4d2 | 847 | write_int(sock_f_out, cur_flist->used); |
8ef246e0 WD |
848 | write_shortint(sock_f_out, ITEM_IS_NEW); |
849 | } | |
9e2409ab WD |
850 | } |
851 | if (iobuf_out) | |
852 | io_flush(NORMAL_FLUSH); | |
853 | } | |
854 | } | |
855 | ||
8ef246e0 WD |
856 | void start_flist_forward(int f_in) |
857 | { | |
858 | assert(iobuf_out != NULL); | |
859 | assert(iobuf_f_out == msg_fd_out); | |
860 | flist_forward_from = f_in; | |
861 | } | |
862 | ||
863 | void stop_flist_forward() | |
864 | { | |
8ef246e0 | 865 | flist_forward_from = -1; |
dde5b772 | 866 | io_flush(FULL_FLUSH); |
8ef246e0 WD |
867 | } |
868 | ||
d8587b46 WD |
869 | /* Continue trying to read len bytes until all have been read. |
870 | * Used to read raw bytes from a multiplexed source. */ | |
3151cbae | 871 | static void read_loop(int fd, char *buf, size_t len) |
4c36ddbe AT |
872 | { |
873 | while (len) { | |
874 | int n = read_timeout(fd, buf, len); | |
875 | ||
876 | buf += n; | |
877 | len -= n; | |
8d9dc9f9 AT |
878 | } |
879 | } | |
880 | ||
d8587b46 WD |
881 | /* Read a message from a multiplexed source. */ |
882 | static void read_a_msg(int fd) | |
8d9dc9f9 | 883 | { |
33544bf4 | 884 | char line[BIGPATHBUFLEN]; |
d8587b46 WD |
885 | size_t msg_bytes; |
886 | int tag, flist_parent = -1, save_msg_fd_in = msg_fd_in; | |
887 | ||
888 | /* Temporarily disable msg_fd_in. This is needed to avoid looping back | |
889 | * to this routine from writefd_unbuffered(). */ | |
890 | msg_fd_in = -1; | |
891 | ||
892 | read_loop(fd, line, 4); | |
893 | tag = IVAL(line, 0); | |
894 | ||
895 | msg_bytes = tag & 0xFFFFFF; | |
896 | tag = (tag >> 24) - MPLEX_BASE; | |
897 | ||
898 | no_flush++; | |
899 | ||
900 | switch (tag) { | |
901 | case MSG_DATA: | |
902 | if (msg_bytes > iobuf_in_siz) { | |
903 | if (!(iobuf_in = realloc_array(iobuf_in, char, msg_bytes))) | |
904 | out_of_memory("read_a_msg"); | |
905 | iobuf_in_siz = msg_bytes; | |
906 | } | |
907 | read_loop(fd, iobuf_in, msg_bytes); | |
908 | iobuf_in_remaining = msg_bytes; | |
909 | iobuf_in_ndx = 0; | |
910 | break; | |
911 | case MSG_DONE: | |
912 | if (msg_bytes > 1 || !am_generator) | |
913 | goto invalid_msg; | |
914 | if (msg_bytes) { | |
915 | read_loop(fd, line, 1); | |
916 | stats.total_read = read_varlong(fd, 3); | |
917 | } | |
918 | msgdone_cnt++; | |
919 | break; | |
920 | case MSG_REDO: | |
921 | if (msg_bytes != 4 || !am_generator) | |
922 | goto invalid_msg; | |
923 | read_loop(fd, line, 4); | |
924 | got_flist_entry_status(FES_REDO, line); | |
925 | break; | |
926 | case MSG_FLIST: | |
927 | if (msg_bytes != 4 || !am_generator || !inc_recurse) | |
928 | goto invalid_msg; | |
929 | read_loop(fd, line, 4); | |
930 | /* Read extra file list from receiver. */ | |
931 | if (DEBUG_GTE(FLIST, 2)) { | |
932 | rprintf(FINFO, "[%s] receiving flist for dir %d\n", | |
933 | who_am_i(), IVAL(line, 0)); | |
934 | } | |
935 | flist_parent = IVAL(line, 0); | |
936 | break; | |
937 | case MSG_FLIST_EOF: | |
938 | if (msg_bytes != 0 || !am_generator || !inc_recurse) | |
939 | goto invalid_msg; | |
940 | flist_eof = 1; | |
941 | break; | |
942 | case MSG_IO_ERROR: | |
943 | if (msg_bytes != 4 || am_sender) | |
944 | goto invalid_msg; | |
945 | read_loop(fd, line, 4); | |
946 | io_error |= IVAL(line, 0); | |
947 | if (!am_generator) | |
948 | send_msg_int(MSG_IO_ERROR, IVAL(line, 0)); | |
949 | break; | |
950 | case MSG_NOOP: | |
951 | if (am_sender) | |
952 | maybe_send_keepalive(); | |
953 | break; | |
954 | case MSG_DEL_STATS: | |
955 | if (msg_bytes) | |
956 | goto invalid_msg; | |
957 | read_del_stats(fd); | |
958 | if (am_sender && am_server) | |
959 | write_del_stats(sock_f_out); | |
960 | break; | |
961 | case MSG_DELETED: | |
962 | if (msg_bytes >= sizeof line) | |
963 | goto overflow; | |
964 | if (am_generator) { | |
965 | read_loop(fd, line, msg_bytes); | |
966 | send_msg(MSG_DELETED, line, msg_bytes, 1); | |
967 | break; | |
968 | } | |
969 | #ifdef ICONV_OPTION | |
970 | if (ic_recv != (iconv_t)-1) { | |
971 | xbuf outbuf, inbuf; | |
972 | char ibuf[512]; | |
973 | int add_null = 0; | |
974 | ||
975 | INIT_CONST_XBUF(outbuf, line); | |
976 | INIT_XBUF(inbuf, ibuf, 0, (size_t)-1); | |
977 | ||
978 | while (msg_bytes) { | |
979 | inbuf.len = msg_bytes > sizeof ibuf | |
980 | ? sizeof ibuf : msg_bytes; | |
981 | read_loop(fd, inbuf.buf, inbuf.len); | |
982 | if (!(msg_bytes -= inbuf.len) | |
983 | && !ibuf[inbuf.len-1]) | |
984 | inbuf.len--, add_null = 1; | |
985 | if (iconvbufs(ic_send, &inbuf, &outbuf, | |
986 | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE) < 0) | |
987 | goto overflow; | |
988 | } | |
989 | if (add_null) { | |
990 | if (outbuf.len == outbuf.size) | |
991 | goto overflow; | |
992 | outbuf.buf[outbuf.len++] = '\0'; | |
993 | } | |
994 | msg_bytes = outbuf.len; | |
995 | } else | |
996 | #endif | |
997 | read_loop(fd, line, msg_bytes); | |
998 | /* A directory name was sent with the trailing null */ | |
999 | if (msg_bytes > 0 && !line[msg_bytes-1]) | |
1000 | log_delete(line, S_IFDIR); | |
1001 | else { | |
1002 | line[msg_bytes] = '\0'; | |
1003 | log_delete(line, S_IFREG); | |
1004 | } | |
1005 | break; | |
1006 | case MSG_SUCCESS: | |
1007 | if (msg_bytes != 4) { | |
1008 | invalid_msg: | |
1009 | rprintf(FERROR, "invalid multi-message %d:%lu [%s%s]\n", | |
1010 | tag, (unsigned long)msg_bytes, who_am_i(), | |
1011 | inc_recurse ? "/inc" : ""); | |
1012 | exit_cleanup(RERR_STREAMIO); | |
1013 | } | |
1014 | read_loop(fd, line, 4); | |
1015 | if (am_generator) | |
1016 | got_flist_entry_status(FES_SUCCESS, line); | |
1017 | else | |
1018 | successful_send(IVAL(line, 0)); | |
1019 | break; | |
1020 | case MSG_NO_SEND: | |
1021 | if (msg_bytes != 4) | |
1022 | goto invalid_msg; | |
1023 | read_loop(fd, line, 4); | |
1024 | if (am_generator) | |
1025 | got_flist_entry_status(FES_NO_SEND, line); | |
1026 | else | |
1027 | send_msg_int(MSG_NO_SEND, IVAL(line, 0)); | |
1028 | break; | |
1029 | case MSG_ERROR_SOCKET: | |
1030 | case MSG_ERROR_UTF8: | |
1031 | case MSG_CLIENT: | |
1032 | case MSG_LOG: | |
1033 | if (!am_generator) | |
1034 | goto invalid_msg; | |
1035 | if (tag == MSG_ERROR_SOCKET) | |
41000dff | 1036 | io_multiplexing_out = 0; |
d8587b46 WD |
1037 | /* FALL THROUGH */ |
1038 | case MSG_INFO: | |
1039 | case MSG_ERROR: | |
1040 | case MSG_ERROR_XFER: | |
1041 | case MSG_WARNING: | |
1042 | if (msg_bytes >= sizeof line) { | |
1043 | overflow: | |
1044 | rprintf(FERROR, | |
1045 | "multiplexing overflow %d:%lu [%s%s]\n", | |
1046 | tag, (unsigned long)msg_bytes, who_am_i(), | |
1047 | inc_recurse ? "/inc" : ""); | |
1048 | exit_cleanup(RERR_STREAMIO); | |
1049 | } | |
1050 | read_loop(fd, line, msg_bytes); | |
1051 | rwrite((enum logcode)tag, line, msg_bytes, !am_generator); | |
1052 | if (first_message) { | |
1053 | if (list_only && !am_sender && tag == 1) { | |
1054 | line[msg_bytes] = '\0'; | |
1055 | check_for_d_option_error(line); | |
1056 | } | |
1057 | first_message = 0; | |
1058 | } | |
1059 | break; | |
1060 | default: | |
1061 | rprintf(FERROR, "unexpected tag %d [%s%s]\n", | |
1062 | tag, who_am_i(), inc_recurse ? "/inc" : ""); | |
1063 | exit_cleanup(RERR_STREAMIO); | |
1064 | } | |
1065 | ||
1066 | msg_fd_in = save_msg_fd_in; | |
1067 | no_flush--; | |
1068 | ||
1069 | if (flist_parent >= 0) { | |
1070 | struct file_list *flist = recv_file_list(fd); | |
1071 | flist->parent_ndx = flist_parent; | |
1072 | #ifdef SUPPORT_HARD_LINKS | |
1073 | if (preserve_hard_links) | |
1074 | match_hard_links(flist); | |
1075 | #endif | |
1076 | } | |
1077 | } | |
1078 | ||
1079 | /* Read from the file descriptor handling multiplexing and return the | |
1080 | * number of bytes read. Never returns <= 0. */ | |
1081 | static int readfd_unbuffered(int fd, char *buf, size_t len) | |
1082 | { | |
1083 | int cnt = 0; | |
8d9dc9f9 | 1084 | |
8ef246e0 | 1085 | if (!iobuf_in || fd != iobuf_f_in) |
4c36ddbe | 1086 | return read_timeout(fd, buf, len); |
8d9dc9f9 | 1087 | |
8ef246e0 WD |
1088 | if (!io_multiplexing_in && iobuf_in_remaining == 0) { |
1089 | iobuf_in_remaining = read_timeout(fd, iobuf_in, iobuf_in_siz); | |
1f75bb10 | 1090 | iobuf_in_ndx = 0; |
76c21947 WD |
1091 | } |
1092 | ||
d8aeda1e | 1093 | while (cnt == 0) { |
8ef246e0 WD |
1094 | if (iobuf_in_remaining) { |
1095 | len = MIN(len, iobuf_in_remaining); | |
1f75bb10 WD |
1096 | memcpy(buf, iobuf_in + iobuf_in_ndx, len); |
1097 | iobuf_in_ndx += len; | |
8ef246e0 | 1098 | iobuf_in_remaining -= len; |
d8aeda1e | 1099 | cnt = len; |
76c21947 | 1100 | break; |
8d9dc9f9 | 1101 | } |
d8587b46 | 1102 | read_a_msg(fd); |
8d9dc9f9 AT |
1103 | } |
1104 | ||
8ef246e0 | 1105 | if (iobuf_in_remaining == 0) |
d17e1dd2 | 1106 | io_flush(NORMAL_FLUSH); |
76c21947 | 1107 | |
d8aeda1e | 1108 | return cnt; |
8d9dc9f9 AT |
1109 | } |
1110 | ||
dde5b772 WD |
1111 | /* Do a buffered read from fd. Don't return until all N bytes have |
1112 | * been read. If all N can't be read then exit with an error. */ | |
3151cbae | 1113 | static void readfd(int fd, char *buffer, size_t N) |
720b47f2 | 1114 | { |
d8aeda1e | 1115 | int cnt; |
d62bcc17 | 1116 | size_t total = 0; |
3151cbae | 1117 | |
6ba9279f | 1118 | while (total < N) { |
d8aeda1e WD |
1119 | cnt = readfd_unbuffered(fd, buffer + total, N-total); |
1120 | total += cnt; | |
7f28dbee | 1121 | } |
1b7c47cb | 1122 | |
b9f592fb WD |
1123 | if (fd == write_batch_monitor_in) { |
1124 | if ((size_t)write(batch_fd, buffer, total) != total) | |
1125 | exit_cleanup(RERR_FILEIO); | |
1126 | } | |
1f75bb10 | 1127 | |
8ef246e0 WD |
1128 | if (fd == flist_forward_from) |
1129 | writefd(iobuf_f_out, buffer, total); | |
1130 | ||
1f75bb10 WD |
1131 | if (fd == sock_f_in) |
1132 | stats.total_read += total; | |
720b47f2 AT |
1133 | } |
1134 | ||
3a993aa4 | 1135 | unsigned short read_shortint(int f) |
9361f839 | 1136 | { |
482f48cc WD |
1137 | char b[2]; |
1138 | readfd(f, b, 2); | |
1139 | return (UVAL(b, 1) << 8) + UVAL(b, 0); | |
9361f839 WD |
1140 | } |
1141 | ||
b7922338 | 1142 | int32 read_int(int f) |
720b47f2 | 1143 | { |
4c36ddbe | 1144 | char b[4]; |
d8aeda1e | 1145 | int32 num; |
d730b113 | 1146 | |
482f48cc WD |
1147 | readfd(f, b, 4); |
1148 | num = IVAL(b, 0); | |
1149 | #if SIZEOF_INT32 > 4 | |
1150 | if (num & (int32)0x80000000) | |
1151 | num |= ~(int32)0xffffffff; | |
1152 | #endif | |
d8aeda1e | 1153 | return num; |
720b47f2 AT |
1154 | } |
1155 | ||
351e23ad | 1156 | int32 read_varint(int f) |
3a6a366f | 1157 | { |
351e23ad WD |
1158 | union { |
1159 | char b[5]; | |
1160 | int32 x; | |
1161 | } u; | |
1162 | uchar ch; | |
1163 | int extra; | |
1164 | ||
1165 | u.x = 0; | |
1166 | readfd(f, (char*)&ch, 1); | |
1167 | extra = int_byte_extra[ch / 4]; | |
1168 | if (extra) { | |
1169 | uchar bit = ((uchar)1<<(8-extra)); | |
1170 | if (extra >= (int)sizeof u.b) { | |
1171 | rprintf(FERROR, "Overflow in read_varint()\n"); | |
1172 | exit_cleanup(RERR_STREAMIO); | |
1173 | } | |
1174 | readfd(f, u.b, extra); | |
1175 | u.b[extra] = ch & (bit-1); | |
1176 | } else | |
1177 | u.b[0] = ch; | |
1178 | #if CAREFUL_ALIGNMENT | |
1179 | u.x = IVAL(u.b,0); | |
1180 | #endif | |
1181 | #if SIZEOF_INT32 > 4 | |
1182 | if (u.x & (int32)0x80000000) | |
1183 | u.x |= ~(int32)0xffffffff; | |
1184 | #endif | |
1185 | return u.x; | |
1186 | } | |
71c46176 | 1187 | |
351e23ad WD |
1188 | int64 read_varlong(int f, uchar min_bytes) |
1189 | { | |
1190 | union { | |
1191 | char b[9]; | |
1192 | int64 x; | |
1193 | } u; | |
1194 | char b2[8]; | |
1195 | int extra; | |
71c46176 | 1196 | |
031fa9ad | 1197 | #if SIZEOF_INT64 < 8 |
351e23ad | 1198 | memset(u.b, 0, 8); |
031fa9ad | 1199 | #else |
351e23ad | 1200 | u.x = 0; |
031fa9ad | 1201 | #endif |
351e23ad WD |
1202 | readfd(f, b2, min_bytes); |
1203 | memcpy(u.b, b2+1, min_bytes-1); | |
1204 | extra = int_byte_extra[CVAL(b2, 0) / 4]; | |
1205 | if (extra) { | |
1206 | uchar bit = ((uchar)1<<(8-extra)); | |
1207 | if (min_bytes + extra > (int)sizeof u.b) { | |
1208 | rprintf(FERROR, "Overflow in read_varlong()\n"); | |
1209 | exit_cleanup(RERR_STREAMIO); | |
1210 | } | |
1211 | readfd(f, u.b + min_bytes - 1, extra); | |
1212 | u.b[min_bytes + extra - 1] = CVAL(b2, 0) & (bit-1); | |
4ea4acf1 | 1213 | #if SIZEOF_INT64 < 8 |
351e23ad | 1214 | if (min_bytes + extra > 5 || u.b[4] || CVAL(u.b,3) & 0x80) { |
4ea4acf1 WD |
1215 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); |
1216 | exit_cleanup(RERR_UNSUPPORTED); | |
1217 | } | |
1218 | #endif | |
351e23ad WD |
1219 | } else |
1220 | u.b[min_bytes + extra - 1] = CVAL(b2, 0); | |
1221 | #if SIZEOF_INT64 < 8 | |
1222 | u.x = IVAL(u.b,0); | |
1223 | #elif CAREFUL_ALIGNMENT | |
1224 | u.x = IVAL(u.b,0) | (((int64)IVAL(u.b,4))<<32); | |
1225 | #endif | |
1226 | return u.x; | |
1227 | } | |
1228 | ||
1229 | int64 read_longint(int f) | |
1230 | { | |
4ea4acf1 | 1231 | #if SIZEOF_INT64 >= 8 |
351e23ad | 1232 | char b[9]; |
4ea4acf1 | 1233 | #endif |
351e23ad | 1234 | int32 num = read_int(f); |
71c46176 | 1235 | |
351e23ad WD |
1236 | if (num != (int32)0xffffffff) |
1237 | return num; | |
1238 | ||
1239 | #if SIZEOF_INT64 < 8 | |
1240 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); | |
1241 | exit_cleanup(RERR_UNSUPPORTED); | |
1242 | #else | |
1243 | readfd(f, b, 8); | |
1244 | return IVAL(b,0) | (((int64)IVAL(b,4))<<32); | |
1245 | #endif | |
3a6a366f AT |
1246 | } |
1247 | ||
4a19c3b2 | 1248 | void read_buf(int f, char *buf, size_t len) |
720b47f2 | 1249 | { |
4c36ddbe | 1250 | readfd(f,buf,len); |
720b47f2 AT |
1251 | } |
1252 | ||
4a19c3b2 | 1253 | void read_sbuf(int f, char *buf, size_t len) |
575f2fca | 1254 | { |
93095cbe | 1255 | readfd(f, buf, len); |
af436313 | 1256 | buf[len] = '\0'; |
575f2fca AT |
1257 | } |
1258 | ||
9361f839 | 1259 | uchar read_byte(int f) |
182dca5c | 1260 | { |
9361f839 | 1261 | uchar c; |
93095cbe | 1262 | readfd(f, (char *)&c, 1); |
4c36ddbe | 1263 | return c; |
182dca5c | 1264 | } |
720b47f2 | 1265 | |
46e99b09 WD |
1266 | int read_vstring(int f, char *buf, int bufsize) |
1267 | { | |
1268 | int len = read_byte(f); | |
1269 | ||
1270 | if (len & 0x80) | |
1271 | len = (len & ~0x80) * 0x100 + read_byte(f); | |
1272 | ||
1273 | if (len >= bufsize) { | |
1274 | rprintf(FERROR, "over-long vstring received (%d > %d)\n", | |
1275 | len, bufsize - 1); | |
9a6ed83f | 1276 | return -1; |
46e99b09 WD |
1277 | } |
1278 | ||
1279 | if (len) | |
1280 | readfd(f, buf, len); | |
1281 | buf[len] = '\0'; | |
1282 | return len; | |
1283 | } | |
1284 | ||
188fed95 WD |
1285 | /* Populate a sum_struct with values from the socket. This is |
1286 | * called by both the sender and the receiver. */ | |
1287 | void read_sum_head(int f, struct sum_struct *sum) | |
1288 | { | |
8bd77e70 | 1289 | int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE; |
188fed95 | 1290 | sum->count = read_int(f); |
c638caa6 WD |
1291 | if (sum->count < 0) { |
1292 | rprintf(FERROR, "Invalid checksum count %ld [%s]\n", | |
1293 | (long)sum->count, who_am_i()); | |
1294 | exit_cleanup(RERR_PROTOCOL); | |
1295 | } | |
188fed95 | 1296 | sum->blength = read_int(f); |
8bd77e70 | 1297 | if (sum->blength < 0 || sum->blength > max_blength) { |
cdf236aa WD |
1298 | rprintf(FERROR, "Invalid block length %ld [%s]\n", |
1299 | (long)sum->blength, who_am_i()); | |
188fed95 WD |
1300 | exit_cleanup(RERR_PROTOCOL); |
1301 | } | |
1302 | sum->s2length = protocol_version < 27 ? csum_length : (int)read_int(f); | |
a0456b9c | 1303 | if (sum->s2length < 0 || sum->s2length > MAX_DIGEST_LEN) { |
cdf236aa WD |
1304 | rprintf(FERROR, "Invalid checksum length %d [%s]\n", |
1305 | sum->s2length, who_am_i()); | |
188fed95 WD |
1306 | exit_cleanup(RERR_PROTOCOL); |
1307 | } | |
1308 | sum->remainder = read_int(f); | |
1309 | if (sum->remainder < 0 || sum->remainder > sum->blength) { | |
cdf236aa WD |
1310 | rprintf(FERROR, "Invalid remainder length %ld [%s]\n", |
1311 | (long)sum->remainder, who_am_i()); | |
188fed95 WD |
1312 | exit_cleanup(RERR_PROTOCOL); |
1313 | } | |
1314 | } | |
1315 | ||
c207d7ec WD |
1316 | /* Send the values from a sum_struct over the socket. Set sum to |
1317 | * NULL if there are no checksums to send. This is called by both | |
1318 | * the generator and the sender. */ | |
1319 | void write_sum_head(int f, struct sum_struct *sum) | |
1320 | { | |
1321 | static struct sum_struct null_sum; | |
1322 | ||
1323 | if (sum == NULL) | |
1324 | sum = &null_sum; | |
1325 | ||
1326 | write_int(f, sum->count); | |
1327 | write_int(f, sum->blength); | |
1328 | if (protocol_version >= 27) | |
1329 | write_int(f, sum->s2length); | |
1330 | write_int(f, sum->remainder); | |
1331 | } | |
1332 | ||
08571358 MP |
1333 | /** |
1334 | * Sleep after writing to limit I/O bandwidth usage. | |
1335 | * | |
1336 | * @todo Rather than sleeping after each write, it might be better to | |
1337 | * use some kind of averaging. The current algorithm seems to always | |
1338 | * use a bit less bandwidth than specified, because it doesn't make up | |
1339 | * for slow periods. But arguably this is a feature. In addition, we | |
1340 | * ought to take the time used to write the data into account. | |
71e58630 WD |
1341 | * |
1342 | * During some phases of big transfers (file FOO is uptodate) this is | |
1343 | * called with a small bytes_written every time. As the kernel has to | |
1344 | * round small waits up to guarantee that we actually wait at least the | |
1345 | * requested number of microseconds, this can become grossly inaccurate. | |
1346 | * We therefore keep track of the bytes we've written over time and only | |
1347 | * sleep when the accumulated delay is at least 1 tenth of a second. | |
08571358 MP |
1348 | **/ |
1349 | static void sleep_for_bwlimit(int bytes_written) | |
1350 | { | |
71e58630 | 1351 | static struct timeval prior_tv; |
0f78b815 | 1352 | static long total_written = 0; |
71e58630 WD |
1353 | struct timeval tv, start_tv; |
1354 | long elapsed_usec, sleep_usec; | |
1355 | ||
1356 | #define ONE_SEC 1000000L /* # of microseconds in a second */ | |
08571358 | 1357 | |
9a0cfff5 | 1358 | if (!bwlimit_writemax) |
08571358 | 1359 | return; |
e681e820 | 1360 | |
0f78b815 | 1361 | total_written += bytes_written; |
71e58630 WD |
1362 | |
1363 | gettimeofday(&start_tv, NULL); | |
1364 | if (prior_tv.tv_sec) { | |
1365 | elapsed_usec = (start_tv.tv_sec - prior_tv.tv_sec) * ONE_SEC | |
1366 | + (start_tv.tv_usec - prior_tv.tv_usec); | |
1367 | total_written -= elapsed_usec * bwlimit / (ONE_SEC/1024); | |
1368 | if (total_written < 0) | |
1369 | total_written = 0; | |
1370 | } | |
3151cbae | 1371 | |
71e58630 WD |
1372 | sleep_usec = total_written * (ONE_SEC/1024) / bwlimit; |
1373 | if (sleep_usec < ONE_SEC / 10) { | |
1374 | prior_tv = start_tv; | |
1375 | return; | |
1376 | } | |
08571358 | 1377 | |
71e58630 WD |
1378 | tv.tv_sec = sleep_usec / ONE_SEC; |
1379 | tv.tv_usec = sleep_usec % ONE_SEC; | |
98b332ed | 1380 | select(0, NULL, NULL, NULL, &tv); |
71e58630 WD |
1381 | |
1382 | gettimeofday(&prior_tv, NULL); | |
1383 | elapsed_usec = (prior_tv.tv_sec - start_tv.tv_sec) * ONE_SEC | |
1384 | + (prior_tv.tv_usec - start_tv.tv_usec); | |
1385 | total_written = (sleep_usec - elapsed_usec) * bwlimit / (ONE_SEC/1024); | |
08571358 MP |
1386 | } |
1387 | ||
f8605c5b MM |
1388 | static const char *what_fd_is(int fd) |
1389 | { | |
1390 | static char buf[20]; | |
1391 | ||
1392 | if (fd == sock_f_out) | |
1393 | return "socket"; | |
1394 | else if (fd == msg_fd_out) | |
1395 | return "message fd"; | |
1396 | else if (fd == batch_fd) | |
1397 | return "batch file"; | |
1398 | else { | |
1399 | snprintf(buf, sizeof buf, "fd %d", fd); | |
1400 | return buf; | |
1401 | } | |
1402 | } | |
1403 | ||
1f75bb10 | 1404 | /* Write len bytes to the file descriptor fd, looping as necessary to get |
0fb2fc4a | 1405 | * the job done and also (in certain circumstances) reading any data on |
af436313 | 1406 | * msg_fd_in to avoid deadlock. |
880da007 MP |
1407 | * |
1408 | * This function underlies the multiplexing system. The body of the | |
1f75bb10 | 1409 | * application never calls this function directly. */ |
4a19c3b2 | 1410 | static void writefd_unbuffered(int fd, const char *buf, size_t len) |
720b47f2 | 1411 | { |
1ea087a7 | 1412 | size_t n, total = 0; |
6c850772 | 1413 | fd_set w_fds, r_fds, e_fds; |
d8aeda1e | 1414 | int maxfd, count, cnt, using_r_fds; |
e4c877cf | 1415 | int defer_inc = 0; |
8d9dc9f9 | 1416 | struct timeval tv; |
720b47f2 | 1417 | |
3be97bf9 | 1418 | if (no_flush++) |
e4c877cf | 1419 | defer_forwarding_messages++, defer_inc++; |
e44f9a12 | 1420 | |
4c36ddbe | 1421 | while (total < len) { |
8d9dc9f9 | 1422 | FD_ZERO(&w_fds); |
6c850772 WD |
1423 | FD_SET(fd, &w_fds); |
1424 | FD_ZERO(&e_fds); | |
1425 | FD_SET(fd, &e_fds); | |
1ea087a7 | 1426 | maxfd = fd; |
4c36ddbe | 1427 | |
d8587b46 | 1428 | if (msg_fd_in >= 0 && iobuf_in_remaining == 0) { |
56014c8c | 1429 | FD_ZERO(&r_fds); |
6c850772 | 1430 | FD_SET(msg_fd_in, &r_fds); |
1ea087a7 WD |
1431 | if (msg_fd_in > maxfd) |
1432 | maxfd = msg_fd_in; | |
3eeac9bc WD |
1433 | using_r_fds = 1; |
1434 | } else | |
1435 | using_r_fds = 0; | |
8d9dc9f9 | 1436 | |
e626b29e | 1437 | tv.tv_sec = select_timeout; |
8d9dc9f9 | 1438 | tv.tv_usec = 0; |
4c36ddbe | 1439 | |
554e0a8d | 1440 | errno = 0; |
3eeac9bc | 1441 | count = select(maxfd + 1, using_r_fds ? &r_fds : NULL, |
6c850772 | 1442 | &w_fds, &e_fds, &tv); |
4c36ddbe AT |
1443 | |
1444 | if (count <= 0) { | |
1ea087a7 | 1445 | if (count < 0 && errno == EBADF) |
554e0a8d | 1446 | exit_cleanup(RERR_SOCKETIO); |
bd717af8 | 1447 | check_timeout(); |
8d9dc9f9 AT |
1448 | continue; |
1449 | } | |
4c36ddbe | 1450 | |
35c8fd76 WD |
1451 | /*if (FD_ISSET(fd, &e_fds)) |
1452 | rprintf(FINFO, "select exception on fd %d\n", fd); */ | |
6c850772 | 1453 | |
3eeac9bc | 1454 | if (using_r_fds && FD_ISSET(msg_fd_in, &r_fds)) |
d8587b46 | 1455 | read_a_msg(msg_fd_in); |
554e0a8d | 1456 | |
9a6ed83f | 1457 | if (!FD_ISSET(fd, &w_fds)) |
1ea087a7 | 1458 | continue; |
4c36ddbe | 1459 | |
1ea087a7 | 1460 | n = len - total; |
9a0cfff5 | 1461 | if (bwlimit_writemax && n > bwlimit_writemax) |
1ea087a7 | 1462 | n = bwlimit_writemax; |
d8aeda1e | 1463 | cnt = write(fd, buf + total, n); |
1ea087a7 | 1464 | |
d8aeda1e WD |
1465 | if (cnt <= 0) { |
1466 | if (cnt < 0) { | |
3309507d WD |
1467 | if (errno == EINTR) |
1468 | continue; | |
1469 | if (errno == EWOULDBLOCK || errno == EAGAIN) { | |
1470 | msleep(1); | |
1471 | continue; | |
1472 | } | |
f0359dd0 AT |
1473 | } |
1474 | ||
1ea087a7 | 1475 | /* Don't try to write errors back across the stream. */ |
1f75bb10 | 1476 | if (fd == sock_f_out) |
41000dff | 1477 | io_multiplexing_out = 0; |
2a5df862 WD |
1478 | /* Don't try to write errors down a failing msg pipe. */ |
1479 | if (am_server && fd == msg_fd_out) | |
1480 | exit_cleanup(RERR_STREAMIO); | |
1ea087a7 | 1481 | rsyserr(FERROR, errno, |
f8605c5b MM |
1482 | "writefd_unbuffered failed to write %ld bytes to %s [%s]", |
1483 | (long)len, what_fd_is(fd), who_am_i()); | |
d1b31da7 WD |
1484 | /* If the other side is sending us error messages, try |
1485 | * to grab any messages they sent before they died. */ | |
f2179fd3 | 1486 | while (!am_server && fd == sock_f_out && io_multiplexing_in) { |
ba525f77 | 1487 | char buf[1024]; |
3b0a30eb | 1488 | set_io_timeout(30); |
9e2409ab | 1489 | ignore_timeout = 0; |
d8587b46 | 1490 | readfd_unbuffered(iobuf_f_in, buf, sizeof buf); |
d1b31da7 | 1491 | } |
1ea087a7 WD |
1492 | exit_cleanup(RERR_STREAMIO); |
1493 | } | |
4c36ddbe | 1494 | |
d8aeda1e | 1495 | total += cnt; |
e4c877cf | 1496 | defer_forwarding_messages++, defer_inc++; |
a800434a | 1497 | |
1f75bb10 | 1498 | if (fd == sock_f_out) { |
626bec8e | 1499 | if (io_timeout || am_generator) |
3b0a30eb | 1500 | last_io_out = time(NULL); |
d8aeda1e | 1501 | sleep_for_bwlimit(cnt); |
1f75bb10 | 1502 | } |
4c36ddbe | 1503 | } |
e44f9a12 AT |
1504 | |
1505 | no_flush--; | |
0b789446 WD |
1506 | if (keep_defer_forwarding) |
1507 | defer_inc--; | |
17a4977b | 1508 | if (!(defer_forwarding_messages -= defer_inc) && !no_flush) |
e4c877cf | 1509 | msg_flush(); |
d6dead6b AT |
1510 | } |
1511 | ||
0b789446 | 1512 | int io_flush(int flush_it_all) |
d6dead6b | 1513 | { |
0b789446 | 1514 | int flushed_something = 0; |
8d9dc9f9 | 1515 | |
0b789446 WD |
1516 | if (no_flush) |
1517 | return 0; | |
e4c877cf | 1518 | |
0b789446 WD |
1519 | if (iobuf_out_cnt) { |
1520 | if (io_multiplexing_out) | |
d8587b46 | 1521 | mplex_write(iobuf_f_out, MSG_DATA, iobuf_out, iobuf_out_cnt, 0); |
0b789446 WD |
1522 | else |
1523 | writefd_unbuffered(iobuf_f_out, iobuf_out, iobuf_out_cnt); | |
1524 | iobuf_out_cnt = 0; | |
1525 | flushed_something = 1; | |
1526 | } | |
1527 | ||
1528 | if (flush_it_all && !defer_forwarding_messages && msg_queue.head) { | |
e4c877cf | 1529 | msg_flush(); |
0b789446 WD |
1530 | flushed_something = 1; |
1531 | } | |
1532 | ||
1533 | return flushed_something; | |
8d9dc9f9 AT |
1534 | } |
1535 | ||
4a19c3b2 | 1536 | static void writefd(int fd, const char *buf, size_t len) |
d6dead6b | 1537 | { |
1f75bb10 WD |
1538 | if (fd == sock_f_out) |
1539 | stats.total_written += len; | |
1540 | ||
f8605c5b MM |
1541 | if (fd == write_batch_monitor_out) |
1542 | writefd_unbuffered(batch_fd, buf, len); | |
b9f592fb | 1543 | |
8ef246e0 | 1544 | if (!iobuf_out || fd != iobuf_f_out) { |
4c36ddbe AT |
1545 | writefd_unbuffered(fd, buf, len); |
1546 | return; | |
1547 | } | |
d6dead6b AT |
1548 | |
1549 | while (len) { | |
1f75bb10 | 1550 | int n = MIN((int)len, IO_BUFFER_SIZE - iobuf_out_cnt); |
d6dead6b | 1551 | if (n > 0) { |
1f75bb10 | 1552 | memcpy(iobuf_out+iobuf_out_cnt, buf, n); |
d6dead6b AT |
1553 | buf += n; |
1554 | len -= n; | |
1f75bb10 | 1555 | iobuf_out_cnt += n; |
d6dead6b | 1556 | } |
3151cbae | 1557 | |
1f75bb10 | 1558 | if (iobuf_out_cnt == IO_BUFFER_SIZE) |
d17e1dd2 | 1559 | io_flush(NORMAL_FLUSH); |
d6dead6b | 1560 | } |
d6dead6b | 1561 | } |
720b47f2 | 1562 | |
3a993aa4 | 1563 | void write_shortint(int f, unsigned short x) |
9361f839 | 1564 | { |
3a993aa4 WD |
1565 | char b[2]; |
1566 | b[0] = (char)x; | |
1567 | b[1] = (char)(x >> 8); | |
1568 | writefd(f, b, 2); | |
9361f839 WD |
1569 | } |
1570 | ||
351e23ad WD |
1571 | void write_int(int f, int32 x) |
1572 | { | |
1573 | char b[4]; | |
1574 | SIVAL(b, 0, x); | |
1575 | writefd(f, b, 4); | |
1576 | } | |
1577 | ||
f31514ad | 1578 | void write_varint(int f, int32 x) |
1c3344a1 WD |
1579 | { |
1580 | char b[5]; | |
351e23ad WD |
1581 | uchar bit; |
1582 | int cnt = 4; | |
1583 | ||
1584 | SIVAL(b, 1, x); | |
1585 | ||
1586 | while (cnt > 1 && b[cnt] == 0) | |
1587 | cnt--; | |
1588 | bit = ((uchar)1<<(7-cnt+1)); | |
1589 | if (CVAL(b, cnt) >= bit) { | |
1590 | cnt++; | |
1591 | *b = ~(bit-1); | |
1592 | } else if (cnt > 1) | |
1593 | *b = b[cnt] | ~(bit*2-1); | |
1594 | else | |
1595 | *b = b[cnt]; | |
1596 | ||
1597 | writefd(f, b, cnt); | |
1c3344a1 WD |
1598 | } |
1599 | ||
351e23ad | 1600 | void write_varlong(int f, int64 x, uchar min_bytes) |
720b47f2 | 1601 | { |
351e23ad WD |
1602 | char b[9]; |
1603 | uchar bit; | |
1604 | int cnt = 8; | |
1605 | ||
1606 | SIVAL(b, 1, x); | |
1607 | #if SIZEOF_INT64 >= 8 | |
1608 | SIVAL(b, 5, x >> 32); | |
1609 | #else | |
1610 | if (x <= 0x7FFFFFFF && x >= 0) | |
1611 | memset(b + 5, 0, 4); | |
1612 | else { | |
1613 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); | |
1614 | exit_cleanup(RERR_UNSUPPORTED); | |
1615 | } | |
1616 | #endif | |
1617 | ||
1618 | while (cnt > min_bytes && b[cnt] == 0) | |
1619 | cnt--; | |
1620 | bit = ((uchar)1<<(7-cnt+min_bytes)); | |
1621 | if (CVAL(b, cnt) >= bit) { | |
1622 | cnt++; | |
1623 | *b = ~(bit-1); | |
1624 | } else if (cnt > min_bytes) | |
1625 | *b = b[cnt] | ~(bit*2-1); | |
1626 | else | |
1627 | *b = b[cnt]; | |
1628 | ||
1629 | writefd(f, b, cnt); | |
720b47f2 AT |
1630 | } |
1631 | ||
7a24c346 MP |
1632 | /* |
1633 | * Note: int64 may actually be a 32-bit type if ./configure couldn't find any | |
1634 | * 64-bit types on this platform. | |
1635 | */ | |
71c46176 | 1636 | void write_longint(int f, int64 x) |
3a6a366f | 1637 | { |
351e23ad | 1638 | char b[12], * const s = b+4; |
3a6a366f | 1639 | |
351e23ad WD |
1640 | SIVAL(s, 0, x); |
1641 | if (x <= 0x7FFFFFFF && x >= 0) { | |
482f48cc | 1642 | writefd(f, s, 4); |
351e23ad WD |
1643 | return; |
1644 | } | |
3a6a366f | 1645 | |
4ea4acf1 | 1646 | #if SIZEOF_INT64 < 8 |
351e23ad WD |
1647 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); |
1648 | exit_cleanup(RERR_UNSUPPORTED); | |
4ea4acf1 | 1649 | #else |
351e23ad WD |
1650 | memset(b, 0xFF, 4); |
1651 | SIVAL(s, 4, x >> 32); | |
1652 | writefd(f, b, 12); | |
4ea4acf1 | 1653 | #endif |
3a6a366f AT |
1654 | } |
1655 | ||
4a19c3b2 | 1656 | void write_buf(int f, const char *buf, size_t len) |
720b47f2 | 1657 | { |
4c36ddbe | 1658 | writefd(f,buf,len); |
720b47f2 AT |
1659 | } |
1660 | ||
880da007 | 1661 | /** Write a string to the connection */ |
4a19c3b2 | 1662 | void write_sbuf(int f, const char *buf) |
f0fca04e | 1663 | { |
93095cbe | 1664 | writefd(f, buf, strlen(buf)); |
f0fca04e AT |
1665 | } |
1666 | ||
9361f839 | 1667 | void write_byte(int f, uchar c) |
182dca5c | 1668 | { |
93095cbe | 1669 | writefd(f, (char *)&c, 1); |
182dca5c AT |
1670 | } |
1671 | ||
4a19c3b2 | 1672 | void write_vstring(int f, const char *str, int len) |
46e99b09 WD |
1673 | { |
1674 | uchar lenbuf[3], *lb = lenbuf; | |
1675 | ||
1676 | if (len > 0x7F) { | |
1677 | if (len > 0x7FFF) { | |
1678 | rprintf(FERROR, | |
1679 | "attempting to send over-long vstring (%d > %d)\n", | |
1680 | len, 0x7FFF); | |
1681 | exit_cleanup(RERR_PROTOCOL); | |
1682 | } | |
1683 | *lb++ = len / 0x100 + 0x80; | |
1684 | } | |
1685 | *lb = len; | |
1686 | ||
1687 | writefd(f, (char*)lenbuf, lb - lenbuf + 1); | |
1688 | if (len) | |
1689 | writefd(f, str, len); | |
1690 | } | |
1691 | ||
8a65e0ce WD |
1692 | /* Send a file-list index using a byte-reduction method. */ |
1693 | void write_ndx(int f, int32 ndx) | |
1694 | { | |
1695 | static int32 prev_positive = -1, prev_negative = 1; | |
1696 | int32 diff, cnt = 0; | |
1697 | char b[6]; | |
1698 | ||
1699 | if (protocol_version < 30 || read_batch) { | |
1700 | write_int(f, ndx); | |
1701 | return; | |
1702 | } | |
1703 | ||
1704 | /* Send NDX_DONE as a single-byte 0 with no side effects. Send | |
1705 | * negative nums as a positive after sending a leading 0xFF. */ | |
1706 | if (ndx >= 0) { | |
1707 | diff = ndx - prev_positive; | |
1708 | prev_positive = ndx; | |
1709 | } else if (ndx == NDX_DONE) { | |
1710 | *b = 0; | |
1711 | writefd(f, b, 1); | |
1712 | return; | |
1713 | } else { | |
1714 | b[cnt++] = (char)0xFF; | |
1715 | ndx = -ndx; | |
1716 | diff = ndx - prev_negative; | |
1717 | prev_negative = ndx; | |
1718 | } | |
1719 | ||
1720 | /* A diff of 1 - 253 is sent as a one-byte diff; a diff of 254 - 32767 | |
1721 | * or 0 is sent as a 0xFE + a two-byte diff; otherwise we send 0xFE | |
1722 | * & all 4 bytes of the (non-negative) num with the high-bit set. */ | |
1723 | if (diff < 0xFE && diff > 0) | |
1724 | b[cnt++] = (char)diff; | |
1725 | else if (diff < 0 || diff > 0x7FFF) { | |
1726 | b[cnt++] = (char)0xFE; | |
1727 | b[cnt++] = (char)((ndx >> 24) | 0x80); | |
8a65e0ce | 1728 | b[cnt++] = (char)ndx; |
351e23ad WD |
1729 | b[cnt++] = (char)(ndx >> 8); |
1730 | b[cnt++] = (char)(ndx >> 16); | |
8a65e0ce WD |
1731 | } else { |
1732 | b[cnt++] = (char)0xFE; | |
1733 | b[cnt++] = (char)(diff >> 8); | |
1734 | b[cnt++] = (char)diff; | |
1735 | } | |
1736 | writefd(f, b, cnt); | |
1737 | } | |
1738 | ||
1739 | /* Receive a file-list index using a byte-reduction method. */ | |
1740 | int32 read_ndx(int f) | |
1741 | { | |
1742 | static int32 prev_positive = -1, prev_negative = 1; | |
1743 | int32 *prev_ptr, num; | |
1744 | char b[4]; | |
1745 | ||
1746 | if (protocol_version < 30) | |
1747 | return read_int(f); | |
1748 | ||
1749 | readfd(f, b, 1); | |
1750 | if (CVAL(b, 0) == 0xFF) { | |
1751 | readfd(f, b, 1); | |
1752 | prev_ptr = &prev_negative; | |
1753 | } else if (CVAL(b, 0) == 0) | |
1754 | return NDX_DONE; | |
1755 | else | |
1756 | prev_ptr = &prev_positive; | |
1757 | if (CVAL(b, 0) == 0xFE) { | |
1758 | readfd(f, b, 2); | |
1759 | if (CVAL(b, 0) & 0x80) { | |
351e23ad WD |
1760 | b[3] = CVAL(b, 0) & ~0x80; |
1761 | b[0] = b[1]; | |
1762 | readfd(f, b+1, 2); | |
1763 | num = IVAL(b, 0); | |
8a65e0ce | 1764 | } else |
351e23ad | 1765 | num = (UVAL(b,0)<<8) + UVAL(b,1) + *prev_ptr; |
8a65e0ce | 1766 | } else |
351e23ad | 1767 | num = UVAL(b, 0) + *prev_ptr; |
8a65e0ce WD |
1768 | *prev_ptr = num; |
1769 | if (prev_ptr == &prev_negative) | |
1770 | num = -num; | |
1771 | return num; | |
1772 | } | |
1773 | ||
67b8f3df WD |
1774 | /* Read a line of up to bufsiz-1 characters into buf. Strips |
1775 | * the (required) trailing newline and all carriage returns. | |
1776 | * Returns 1 for success; 0 for I/O error or truncation. */ | |
1777 | int read_line_old(int f, char *buf, size_t bufsiz) | |
f0fca04e | 1778 | { |
67b8f3df WD |
1779 | bufsiz--; /* leave room for the null */ |
1780 | while (bufsiz > 0) { | |
528bfcd7 | 1781 | buf[0] = 0; |
f0fca04e | 1782 | read_buf(f, buf, 1); |
914cc65c MP |
1783 | if (buf[0] == 0) |
1784 | return 0; | |
6ed6d7f5 | 1785 | if (buf[0] == '\n') |
f0fca04e | 1786 | break; |
f0fca04e AT |
1787 | if (buf[0] != '\r') { |
1788 | buf++; | |
67b8f3df | 1789 | bufsiz--; |
f0fca04e AT |
1790 | } |
1791 | } | |
6ed6d7f5 | 1792 | *buf = '\0'; |
67b8f3df | 1793 | return bufsiz > 0; |
f0fca04e AT |
1794 | } |
1795 | ||
f0fca04e AT |
1796 | void io_printf(int fd, const char *format, ...) |
1797 | { | |
d62bcc17 | 1798 | va_list ap; |
33544bf4 | 1799 | char buf[BIGPATHBUFLEN]; |
f0fca04e | 1800 | int len; |
3151cbae | 1801 | |
f0fca04e | 1802 | va_start(ap, format); |
3151cbae | 1803 | len = vsnprintf(buf, sizeof buf, format, ap); |
f0fca04e AT |
1804 | va_end(ap); |
1805 | ||
f89b9368 WD |
1806 | if (len < 0) |
1807 | exit_cleanup(RERR_STREAMIO); | |
f0fca04e | 1808 | |
33544bf4 WD |
1809 | if (len > (int)sizeof buf) { |
1810 | rprintf(FERROR, "io_printf() was too long for the buffer.\n"); | |
1811 | exit_cleanup(RERR_STREAMIO); | |
1812 | } | |
1813 | ||
f0fca04e AT |
1814 | write_sbuf(fd, buf); |
1815 | } | |
8d9dc9f9 | 1816 | |
d17e1dd2 | 1817 | /** Setup for multiplexing a MSG_* stream with the data stream. */ |
d8587b46 | 1818 | void io_start_multiplex_out(int f) |
8d9dc9f9 | 1819 | { |
d17e1dd2 | 1820 | io_flush(NORMAL_FLUSH); |
d8587b46 | 1821 | io_start_buffering_out(f); |
8d9dc9f9 AT |
1822 | io_multiplexing_out = 1; |
1823 | } | |
1824 | ||
d17e1dd2 | 1825 | /** Setup for multiplexing a MSG_* stream with the data stream. */ |
d8587b46 | 1826 | void io_start_multiplex_in(int f) |
8d9dc9f9 | 1827 | { |
d17e1dd2 | 1828 | io_flush(NORMAL_FLUSH); |
d8587b46 | 1829 | io_start_buffering_in(f); |
8d9dc9f9 AT |
1830 | io_multiplexing_in = 1; |
1831 | } | |
1832 | ||
d17e1dd2 | 1833 | /** Write an message to the multiplexed data stream. */ |
332cf6df | 1834 | int io_multiplex_write(enum msgcode code, const char *buf, size_t len, int convert) |
8d9dc9f9 | 1835 | { |
f89b9368 WD |
1836 | if (!io_multiplexing_out) |
1837 | return 0; | |
d17e1dd2 | 1838 | io_flush(NORMAL_FLUSH); |
1b7c47cb | 1839 | stats.total_written += (len+4); |
d8587b46 | 1840 | mplex_write(iobuf_f_out, code, buf, len, convert); |
8d9dc9f9 AT |
1841 | return 1; |
1842 | } | |
1843 | ||
8ef246e0 | 1844 | void io_end_multiplex_in(void) |
7f459268 WD |
1845 | { |
1846 | io_multiplexing_in = 0; | |
8ef246e0 | 1847 | io_end_buffering_in(); |
7f459268 WD |
1848 | } |
1849 | ||
d17e1dd2 | 1850 | /** Stop output multiplexing. */ |
8ef246e0 | 1851 | void io_end_multiplex_out(void) |
554e0a8d AT |
1852 | { |
1853 | io_multiplexing_out = 0; | |
8ef246e0 | 1854 | io_end_buffering_out(); |
554e0a8d AT |
1855 | } |
1856 | ||
b9f592fb WD |
1857 | void start_write_batch(int fd) |
1858 | { | |
1859 | /* Some communication has already taken place, but we don't | |
1860 | * enable batch writing until here so that we can write a | |
1861 | * canonical record of the communication even though the | |
1862 | * actual communication so far depends on whether a daemon | |
1863 | * is involved. */ | |
1864 | write_int(batch_fd, protocol_version); | |
71456d30 WD |
1865 | if (protocol_version >= 30) |
1866 | write_byte(batch_fd, inc_recurse); | |
b9f592fb | 1867 | write_int(batch_fd, checksum_seed); |
b9f592fb WD |
1868 | |
1869 | if (am_sender) | |
1870 | write_batch_monitor_out = fd; | |
1871 | else | |
1872 | write_batch_monitor_in = fd; | |
1873 | } | |
1874 | ||
1875 | void stop_write_batch(void) | |
1876 | { | |
1877 | write_batch_monitor_out = -1; | |
1878 | write_batch_monitor_in = -1; | |
1879 | } |