1: /*
2: * Routines only used by the receiving process.
3: *
4: * Copyright (C) 1996-2000 Andrew Tridgell
5: * Copyright (C) 1996 Paul Mackerras
6: * Copyright (C) 2003-2015 Wayne Davison
7: *
8: * This program is free software; you can redistribute it and/or modify
9: * it under the terms of the GNU General Public License as published by
10: * the Free Software Foundation; either version 3 of the License, or
11: * (at your option) any later version.
12: *
13: * This program is distributed in the hope that it will be useful,
14: * but WITHOUT ANY WARRANTY; without even the implied warranty of
15: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16: * GNU General Public License for more details.
17: *
18: * You should have received a copy of the GNU General Public License along
19: * with this program; if not, visit the http://fsf.org website.
20: */
21:
22: #include "rsync.h"
23: #include "inums.h"
24:
25: extern int dry_run;
26: extern int do_xfers;
27: extern int am_root;
28: extern int am_server;
29: extern int inc_recurse;
30: extern int log_before_transfer;
31: extern int stdout_format_has_i;
32: extern int logfile_format_has_i;
33: extern int want_xattr_optim;
34: extern int csum_length;
35: extern int read_batch;
36: extern int write_batch;
37: extern int batch_gen_fd;
38: extern int protocol_version;
39: extern int relative_paths;
40: extern int preserve_hard_links;
41: extern int preserve_perms;
42: extern int preserve_xattrs;
43: extern int basis_dir_cnt;
44: extern int make_backups;
45: extern int cleanup_got_literal;
46: extern int remove_source_files;
47: extern int append_mode;
48: extern int sparse_files;
49: extern int preallocate_files;
50: extern int keep_partial;
51: extern int checksum_len;
52: extern int checksum_seed;
53: extern int inplace;
54: extern int allowed_lull;
55: extern int delay_updates;
56: extern mode_t orig_umask;
57: extern struct stats stats;
58: extern char *tmpdir;
59: extern char *partial_dir;
60: extern char *basis_dir[MAX_BASIS_DIRS+1];
61: extern char sender_file_sum[MAX_DIGEST_LEN];
62: extern struct file_list *cur_flist, *first_flist, *dir_flist;
63: extern filter_rule_list daemon_filter_list;
64:
65: BOOL want_progress_now;
66:
67: static struct bitbag *delayed_bits = NULL;
68: static int phase = 0, redoing = 0;
69: static flist_ndx_list batch_redo_list;
70: /* We're either updating the basis file or an identical copy: */
71: static int updating_basis_or_equiv;
72:
73: #define TMPNAME_SUFFIX ".XXXXXX"
74: #define TMPNAME_SUFFIX_LEN ((int)sizeof TMPNAME_SUFFIX - 1)
75: #define MAX_UNIQUE_NUMBER 999999
76: #define MAX_UNIQUE_LOOP 100
77:
78: /* get_tmpname() - create a tmp filename for a given filename
79: *
80: * If a tmpdir is defined, use that as the directory to put it in. Otherwise,
81: * the tmp filename is in the same directory as the given name. Note that
82: * there may be no directory at all in the given name!
83: *
84: * The tmp filename is basically the given filename with a dot prepended, and
85: * .XXXXXX appended (for mkstemp() to put its unique gunk in). We take care
86: * to not exceed either the MAXPATHLEN or NAME_MAX, especially the last, as
87: * the basename basically becomes 8 characters longer. In such a case, the
88: * original name is shortened sufficiently to make it all fit.
89: *
90: * If the make_unique arg is True, the XXXXXX string is replaced with a unique
91: * string that doesn't exist at the time of the check. This is intended to be
92: * used for creating hard links, symlinks, devices, and special files, since
93: * normal files should be handled by mkstemp() for safety.
94: *
95: * Of course, the only reason the file is based on the original name is to
96: * make it easier to figure out what purpose a temp file is serving when a
97: * transfer is in progress. */
98: int get_tmpname(char *fnametmp, const char *fname, BOOL make_unique)
99: {
100: int maxname, length = 0;
101: const char *f;
102: char *suf;
103:
104: if (tmpdir) {
105: /* Note: this can't overflow, so the return value is safe */
106: length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
107: fnametmp[length++] = '/';
108: }
109:
110: if ((f = strrchr(fname, '/')) != NULL) {
111: ++f;
112: if (!tmpdir) {
113: length = f - fname;
114: /* copy up to and including the slash */
115: strlcpy(fnametmp, fname, length + 1);
116: }
117: } else
118: f = fname;
119:
120: if (!tmpdir) { /* using a tmpdir avoids the leading dot on our temp names */
121: if (*f == '.') /* avoid an extra leading dot for OS X's sake */
122: f++;
123: fnametmp[length++] = '.';
124: }
125:
126: /* The maxname value is bufsize, and includes space for the '\0'.
127: * NAME_MAX needs an extra -1 for the name's leading dot. */
128: maxname = MIN(MAXPATHLEN - length - TMPNAME_SUFFIX_LEN,
129: NAME_MAX - 1 - TMPNAME_SUFFIX_LEN);
130:
131: if (maxname < 0) {
132: rprintf(FERROR_XFER, "temporary filename too long: %s\n", fname);
133: fnametmp[0] = '\0';
134: return 0;
135: }
136:
137: if (maxname) {
138: int added = strlcpy(fnametmp + length, f, maxname);
139: if (added >= maxname)
140: added = maxname - 1;
141: suf = fnametmp + length + added;
142:
143: /* Trim any dangling high-bit chars if the first-trimmed char (if any) is
144: * also a high-bit char, just in case we cut into a multi-byte sequence.
145: * We are guaranteed to stop because of the leading '.' we added. */
146: if ((int)f[added] & 0x80) {
147: while ((int)suf[-1] & 0x80)
148: suf--;
149: }
150: /* trim one trailing dot before our suffix's dot */
151: if (suf[-1] == '.')
152: suf--;
153: } else
154: suf = fnametmp + length - 1; /* overwrite the leading dot with suffix's dot */
155:
156: if (make_unique) {
157: static unsigned counter_limit;
158: unsigned counter;
159:
160: if (!counter_limit) {
161: counter_limit = (unsigned)getpid() + MAX_UNIQUE_LOOP;
162: if (counter_limit > MAX_UNIQUE_NUMBER || counter_limit < MAX_UNIQUE_LOOP)
163: counter_limit = MAX_UNIQUE_LOOP;
164: }
165: counter = counter_limit - MAX_UNIQUE_LOOP;
166:
167: /* This doesn't have to be very good because we don't need
168: * to worry about someone trying to guess the values: all
169: * a conflict will do is cause a device, special file, hard
170: * link, or symlink to fail to be created. Also: avoid
171: * using mktemp() due to gcc's annoying warning. */
172: while (1) {
173: snprintf(suf, TMPNAME_SUFFIX_LEN+1, ".%d", counter);
174: if (access(fnametmp, 0) < 0)
175: break;
176: if (++counter >= counter_limit)
177: return 0;
178: }
179: } else
180: memcpy(suf, TMPNAME_SUFFIX, TMPNAME_SUFFIX_LEN+1);
181:
182: return 1;
183: }
184:
185: /* Opens a temporary file for writing.
186: * Success: Writes name into fnametmp, returns fd.
187: * Failure: Clobbers fnametmp, returns -1.
188: * Calling cleanup_set() is the caller's job. */
189: int open_tmpfile(char *fnametmp, const char *fname, struct file_struct *file)
190: {
191: int fd;
192: mode_t added_perms;
193:
194: if (!get_tmpname(fnametmp, fname, False))
195: return -1;
196:
197: if (am_root < 0) {
198: /* For --fake-super, the file must be useable by the copying
199: * user, just like it would be for root. */
200: added_perms = S_IRUSR|S_IWUSR;
201: } else {
202: /* For a normal copy, we need to be able to tweak things like xattrs. */
203: added_perms = S_IWUSR;
204: }
205:
206: /* We initially set the perms without the setuid/setgid bits or group
207: * access to ensure that there is no race condition. They will be
208: * correctly updated after the right owner and group info is set.
209: * (Thanks to snabb@epipe.fi for pointing this out.) */
210: fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
211:
212: #if 0
213: /* In most cases parent directories will already exist because their
214: * information should have been previously transferred, but that may
215: * not be the case with -R */
216: if (fd == -1 && relative_paths && errno == ENOENT
217: && make_path(fnametmp, MKP_SKIP_SLASH | MKP_DROP_NAME) == 0) {
218: /* Get back to name with XXXXXX in it. */
219: get_tmpname(fnametmp, fname, False);
220: fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
221: }
222: #endif
223:
224: if (fd == -1) {
225: rsyserr(FERROR_XFER, errno, "mkstemp %s failed",
226: full_fname(fnametmp));
227: return -1;
228: }
229:
230: return fd;
231: }
232:
233: static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
234: const char *fname, int fd, OFF_T total_size)
235: {
236: static char file_sum1[MAX_DIGEST_LEN];
237: struct map_struct *mapbuf;
238: struct sum_struct sum;
239: int32 len;
240: OFF_T offset = 0;
241: OFF_T offset2;
242: char *data;
243: int32 i;
244: char *map = NULL;
245: #ifdef SUPPORT_PREALLOCATION
246: #ifdef PREALLOCATE_NEEDS_TRUNCATE
247: OFF_T preallocated_len = 0;
248: #endif
249:
250: if (preallocate_files && fd != -1 && total_size > 0 && (!inplace || total_size > size_r)) {
251: /* Try to preallocate enough space for file's eventual length. Can
252: * reduce fragmentation on filesystems like ext4, xfs, and NTFS. */
253: if (do_fallocate(fd, 0, total_size) == 0) {
254: #ifdef PREALLOCATE_NEEDS_TRUNCATE
255: preallocated_len = total_size;
256: #endif
257: } else
258: rsyserr(FWARNING, errno, "do_fallocate %s", full_fname(fname));
259: }
260: #endif
261:
262: read_sum_head(f_in, &sum);
263:
264: if (fd_r >= 0 && size_r > 0) {
265: int32 read_size = MAX(sum.blength * 2, 16*1024);
266: mapbuf = map_file(fd_r, size_r, read_size, sum.blength);
267: if (DEBUG_GTE(DELTASUM, 2)) {
268: rprintf(FINFO, "recv mapped %s of size %s\n",
269: fname_r, big_num(size_r));
270: }
271: } else
272: mapbuf = NULL;
273:
274: sum_init(checksum_seed);
275:
276: if (append_mode > 0) {
277: OFF_T j;
278: sum.flength = (OFF_T)sum.count * sum.blength;
279: if (sum.remainder)
280: sum.flength -= sum.blength - sum.remainder;
281: if (append_mode == 2 && mapbuf) {
282: for (j = CHUNK_SIZE; j < sum.flength; j += CHUNK_SIZE) {
283: if (INFO_GTE(PROGRESS, 1))
284: show_progress(offset, total_size);
285: sum_update(map_ptr(mapbuf, offset, CHUNK_SIZE),
286: CHUNK_SIZE);
287: offset = j;
288: }
289: if (offset < sum.flength) {
290: int32 len = (int32)(sum.flength - offset);
291: if (INFO_GTE(PROGRESS, 1))
292: show_progress(offset, total_size);
293: sum_update(map_ptr(mapbuf, offset, len), len);
294: }
295: }
296: offset = sum.flength;
297: if (fd != -1 && (j = do_lseek(fd, offset, SEEK_SET)) != offset) {
298: rsyserr(FERROR_XFER, errno, "lseek of %s returned %s, not %s",
299: full_fname(fname), big_num(j), big_num(offset));
300: exit_cleanup(RERR_FILEIO);
301: }
302: }
303:
304: while ((i = recv_token(f_in, &data)) != 0) {
305: if (INFO_GTE(PROGRESS, 1))
306: show_progress(offset, total_size);
307: else if (want_progress_now) {
308: rprintf(FINFO, "%s\n", fname);
309: end_progress(offset);
310: }
311: want_progress_now = False;
312:
313: if (allowed_lull)
314: maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH | MSK_ACTIVE_RECEIVER);
315:
316: if (i > 0) {
317: if (DEBUG_GTE(DELTASUM, 3)) {
318: rprintf(FINFO,"data recv %d at %s\n",
319: i, big_num(offset));
320: }
321:
322: stats.literal_data += i;
323: cleanup_got_literal = 1;
324:
325: sum_update(data, i);
326:
327: if (fd != -1 && write_file(fd,data,i) != i)
328: goto report_write_error;
329: offset += i;
330: continue;
331: }
332:
333: i = -(i+1);
334: offset2 = i * (OFF_T)sum.blength;
335: len = sum.blength;
336: if (i == (int)sum.count-1 && sum.remainder != 0)
337: len = sum.remainder;
338:
339: stats.matched_data += len;
340:
341: if (DEBUG_GTE(DELTASUM, 3)) {
342: rprintf(FINFO,
343: "chunk[%d] of size %ld at %s offset=%s%s\n",
344: i, (long)len, big_num(offset2), big_num(offset),
345: updating_basis_or_equiv && offset == offset2 ? " (seek)" : "");
346: }
347:
348: if (mapbuf) {
349: map = map_ptr(mapbuf,offset2,len);
350:
351: see_token(map, len);
352: sum_update(map, len);
353: }
354:
355: if (updating_basis_or_equiv) {
356: if (offset == offset2 && fd != -1) {
357: OFF_T pos;
358: if (flush_write_file(fd) < 0)
359: goto report_write_error;
360: offset += len;
361: if ((pos = do_lseek(fd, len, SEEK_CUR)) != offset) {
362: rsyserr(FERROR_XFER, errno,
363: "lseek of %s returned %s, not %s",
364: full_fname(fname),
365: big_num(pos), big_num(offset));
366: exit_cleanup(RERR_FILEIO);
367: }
368: continue;
369: }
370: }
371: if (fd != -1 && map && write_file(fd, map, len) != (int)len)
372: goto report_write_error;
373: offset += len;
374: }
375:
376: if (flush_write_file(fd) < 0)
377: goto report_write_error;
378:
379: #ifdef HAVE_FTRUNCATE
380: /* inplace: New data could be shorter than old data.
381: * preallocate_files: total_size could have been an overestimate.
382: * Cut off any extra preallocated zeros from dest file. */
383: if ((inplace
384: #ifdef PREALLOCATE_NEEDS_TRUNCATE
385: || preallocated_len > offset
386: #endif
387: ) && fd != -1 && do_ftruncate(fd, offset) < 0) {
388: rsyserr(FERROR_XFER, errno, "ftruncate failed on %s",
389: full_fname(fname));
390: }
391: #endif
392:
393: if (INFO_GTE(PROGRESS, 1))
394: end_progress(total_size);
395:
396: if (fd != -1 && offset > 0 && sparse_end(fd, offset) != 0) {
397: report_write_error:
398: rsyserr(FERROR_XFER, errno, "write failed on %s",
399: full_fname(fname));
400: exit_cleanup(RERR_FILEIO);
401: }
402:
403: if (sum_end(file_sum1) != checksum_len)
404: overflow_exit("checksum_len"); /* Impossible... */
405:
406: if (mapbuf)
407: unmap_file(mapbuf);
408:
409: read_buf(f_in, sender_file_sum, checksum_len);
410: if (DEBUG_GTE(DELTASUM, 2))
411: rprintf(FINFO,"got file_sum\n");
412: if (fd != -1 && memcmp(file_sum1, sender_file_sum, checksum_len) != 0)
413: return 0;
414: return 1;
415: }
416:
417:
418: static void discard_receive_data(int f_in, OFF_T length)
419: {
420: receive_data(f_in, NULL, -1, 0, NULL, -1, length);
421: }
422:
423: static void handle_delayed_updates(char *local_name)
424: {
425: char *fname, *partialptr;
426: int ndx;
427:
428: for (ndx = -1; (ndx = bitbag_next_bit(delayed_bits, ndx)) >= 0; ) {
429: struct file_struct *file = cur_flist->files[ndx];
430: fname = local_name ? local_name : f_name(file, NULL);
431: if ((partialptr = partial_dir_fname(fname)) != NULL) {
432: if (make_backups > 0 && !make_backup(fname, False))
433: continue;
434: if (DEBUG_GTE(RECV, 1)) {
435: rprintf(FINFO, "renaming %s to %s\n",
436: partialptr, fname);
437: }
438: /* We don't use robust_rename() here because the
439: * partial-dir must be on the same drive. */
440: if (do_rename(partialptr, fname) < 0) {
441: rsyserr(FERROR_XFER, errno,
442: "rename failed for %s (from %s)",
443: full_fname(fname), partialptr);
444: } else {
445: if (remove_source_files
446: || (preserve_hard_links && F_IS_HLINKED(file)))
447: send_msg_int(MSG_SUCCESS, ndx);
448: handle_partial_dir(partialptr, PDIR_DELETE);
449: }
450: }
451: }
452: }
453:
454: static void no_batched_update(int ndx, BOOL is_redo)
455: {
456: struct file_list *flist = flist_for_ndx(ndx, "no_batched_update");
457: struct file_struct *file = flist->files[ndx - flist->ndx_start];
458:
459: rprintf(FERROR_XFER, "(No batched update for%s \"%s\")\n",
460: is_redo ? " resend of" : "", f_name(file, NULL));
461:
462: if (inc_recurse && !dry_run)
463: send_msg_int(MSG_NO_SEND, ndx);
464: }
465:
466: static int we_want_redo(int desired_ndx)
467: {
468: static int redo_ndx = -1;
469:
470: while (redo_ndx < desired_ndx) {
471: if (redo_ndx >= 0)
472: no_batched_update(redo_ndx, True);
473: if ((redo_ndx = flist_ndx_pop(&batch_redo_list)) < 0)
474: return 0;
475: }
476:
477: if (redo_ndx == desired_ndx) {
478: redo_ndx = -1;
479: return 1;
480: }
481:
482: return 0;
483: }
484:
485: static int gen_wants_ndx(int desired_ndx, int flist_num)
486: {
487: static int next_ndx = -1;
488: static int done_cnt = 0;
489: static BOOL got_eof = False;
490:
491: if (got_eof)
492: return 0;
493:
494: /* TODO: integrate gen-reading I/O into perform_io() so this is not needed? */
495: io_flush(FULL_FLUSH);
496:
497: while (next_ndx < desired_ndx) {
498: if (inc_recurse && flist_num <= done_cnt)
499: return 0;
500: if (next_ndx >= 0)
501: no_batched_update(next_ndx, False);
502: if ((next_ndx = read_int(batch_gen_fd)) < 0) {
503: if (inc_recurse) {
504: done_cnt++;
505: continue;
506: }
507: got_eof = True;
508: return 0;
509: }
510: }
511:
512: if (next_ndx == desired_ndx) {
513: next_ndx = -1;
514: return 1;
515: }
516:
517: return 0;
518: }
519:
520: /**
521: * main routine for receiver process.
522: *
523: * Receiver process runs on the same host as the generator process. */
524: int recv_files(int f_in, int f_out, char *local_name)
525: {
526: int fd1,fd2;
527: STRUCT_STAT st;
528: int iflags, xlen;
529: char *fname, fbuf[MAXPATHLEN];
530: char xname[MAXPATHLEN];
531: char fnametmp[MAXPATHLEN];
532: char *fnamecmp, *partialptr;
533: char fnamecmpbuf[MAXPATHLEN];
534: uchar fnamecmp_type;
535: struct file_struct *file;
536: int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
537: enum logcode log_code = log_before_transfer ? FLOG : FINFO;
538: int max_phase = protocol_version >= 29 ? 2 : 1;
539: int dflt_perms = (ACCESSPERMS & ~orig_umask);
540: #ifdef SUPPORT_ACLS
541: const char *parent_dirname = "";
542: #endif
543: int ndx, recv_ok;
544:
545: if (DEBUG_GTE(RECV, 1))
546: rprintf(FINFO, "recv_files(%d) starting\n", cur_flist->used);
547:
548: if (delay_updates)
549: delayed_bits = bitbag_create(cur_flist->used + 1);
550:
551: while (1) {
552: cleanup_disable();
553:
554: /* This call also sets cur_flist. */
555: ndx = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type,
556: xname, &xlen);
557: if (ndx == NDX_DONE) {
558: if (!am_server && INFO_GTE(PROGRESS, 2) && cur_flist) {
559: set_current_file_index(NULL, 0);
560: end_progress(0);
561: }
562: if (inc_recurse && first_flist) {
563: if (read_batch) {
564: ndx = first_flist->used + first_flist->ndx_start;
565: gen_wants_ndx(ndx, first_flist->flist_num);
566: }
567: flist_free(first_flist);
568: if (first_flist)
569: continue;
570: } else if (read_batch && first_flist) {
571: ndx = first_flist->used;
572: gen_wants_ndx(ndx, first_flist->flist_num);
573: }
574: if (++phase > max_phase)
575: break;
576: if (DEBUG_GTE(RECV, 1))
577: rprintf(FINFO, "recv_files phase=%d\n", phase);
578: if (phase == 2 && delay_updates)
579: handle_delayed_updates(local_name);
580: write_int(f_out, NDX_DONE);
581: continue;
582: }
583:
584: if (ndx - cur_flist->ndx_start >= 0)
585: file = cur_flist->files[ndx - cur_flist->ndx_start];
586: else
587: file = dir_flist->files[cur_flist->parent_ndx];
588: fname = local_name ? local_name : f_name(file, fbuf);
589:
590: if (DEBUG_GTE(RECV, 1))
591: rprintf(FINFO, "recv_files(%s)\n", fname);
592:
593: #ifdef SUPPORT_XATTRS
594: if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
595: && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE)))
596: recv_xattr_request(file, f_in);
597: #endif
598:
599: if (!(iflags & ITEM_TRANSFER)) {
600: maybe_log_item(file, iflags, itemizing, xname);
601: #ifdef SUPPORT_XATTRS
602: if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
603: && !BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
604: set_file_attrs(fname, file, NULL, fname, 0);
605: #endif
606: if (iflags & ITEM_IS_NEW) {
607: stats.created_files++;
608: if (S_ISREG(file->mode)) {
609: /* Nothing further to count. */
610: } else if (S_ISDIR(file->mode))
611: stats.created_dirs++;
612: #ifdef SUPPORT_LINKS
613: else if (S_ISLNK(file->mode))
614: stats.created_symlinks++;
615: #endif
616: else if (IS_DEVICE(file->mode))
617: stats.created_devices++;
618: else
619: stats.created_specials++;
620: }
621: continue;
622: }
623: if (phase == 2) {
624: rprintf(FERROR,
625: "got transfer request in phase 2 [%s]\n",
626: who_am_i());
627: exit_cleanup(RERR_PROTOCOL);
628: }
629:
630: if (file->flags & FLAG_FILE_SENT) {
631: if (csum_length == SHORT_SUM_LENGTH) {
632: if (keep_partial && !partial_dir)
633: make_backups = -make_backups; /* prevents double backup */
634: if (append_mode)
635: sparse_files = -sparse_files;
636: append_mode = -append_mode;
637: csum_length = SUM_LENGTH;
638: redoing = 1;
639: }
640: } else {
641: if (csum_length != SHORT_SUM_LENGTH) {
642: if (keep_partial && !partial_dir)
643: make_backups = -make_backups;
644: if (append_mode)
645: sparse_files = -sparse_files;
646: append_mode = -append_mode;
647: csum_length = SHORT_SUM_LENGTH;
648: redoing = 0;
649: }
650: if (iflags & ITEM_IS_NEW)
651: stats.created_files++;
652: }
653:
654: if (!am_server && INFO_GTE(PROGRESS, 1))
655: set_current_file_index(file, ndx);
656: stats.xferred_files++;
657: stats.total_transferred_size += F_LENGTH(file);
658:
659: cleanup_got_literal = 0;
660:
661: if (daemon_filter_list.head
662: && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
663: rprintf(FERROR, "attempt to hack rsync failed.\n");
664: exit_cleanup(RERR_PROTOCOL);
665: }
666:
667: if (read_batch) {
668: int wanted = redoing
669: ? we_want_redo(ndx)
670: : gen_wants_ndx(ndx, cur_flist->flist_num);
671: if (!wanted) {
672: rprintf(FINFO,
673: "(Skipping batched update for%s \"%s\")\n",
674: redoing ? " resend of" : "",
675: fname);
676: discard_receive_data(f_in, F_LENGTH(file));
677: file->flags |= FLAG_FILE_SENT;
678: continue;
679: }
680: }
681:
682: remember_initial_stats();
683:
684: if (!do_xfers) { /* log the transfer */
685: log_item(FCLIENT, file, iflags, NULL);
686: if (read_batch)
687: discard_receive_data(f_in, F_LENGTH(file));
688: continue;
689: }
690: if (write_batch < 0) {
691: log_item(FCLIENT, file, iflags, NULL);
692: if (!am_server)
693: discard_receive_data(f_in, F_LENGTH(file));
694: if (inc_recurse)
695: send_msg_int(MSG_SUCCESS, ndx);
696: continue;
697: }
698:
699: partialptr = partial_dir ? partial_dir_fname(fname) : fname;
700:
701: if (protocol_version >= 29) {
702: switch (fnamecmp_type) {
703: case FNAMECMP_FNAME:
704: fnamecmp = fname;
705: break;
706: case FNAMECMP_PARTIAL_DIR:
707: fnamecmp = partialptr;
708: break;
709: case FNAMECMP_BACKUP:
710: fnamecmp = get_backup_name(fname);
711: break;
712: case FNAMECMP_FUZZY:
713: if (file->dirname) {
714: pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, file->dirname, xname);
715: fnamecmp = fnamecmpbuf;
716: } else
717: fnamecmp = xname;
718: break;
719: default:
720: if (fnamecmp_type > FNAMECMP_FUZZY && fnamecmp_type-FNAMECMP_FUZZY <= basis_dir_cnt) {
721: fnamecmp_type -= FNAMECMP_FUZZY + 1;
722: if (file->dirname) {
723: stringjoin(fnamecmpbuf, sizeof fnamecmpbuf,
724: basis_dir[fnamecmp_type], "/", file->dirname, "/", xname, NULL);
725: } else
726: pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], xname);
727: } else if (fnamecmp_type >= basis_dir_cnt) {
728: rprintf(FERROR,
729: "invalid basis_dir index: %d.\n",
730: fnamecmp_type);
731: exit_cleanup(RERR_PROTOCOL);
732: } else
733: pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], fname);
734: fnamecmp = fnamecmpbuf;
735: break;
736: }
737: if (!fnamecmp || (daemon_filter_list.head
738: && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0)) {
739: fnamecmp = fname;
740: fnamecmp_type = FNAMECMP_FNAME;
741: }
742: } else {
743: /* Reminder: --inplace && --partial-dir are never
744: * enabled at the same time. */
745: if (inplace && make_backups > 0) {
746: if (!(fnamecmp = get_backup_name(fname)))
747: fnamecmp = fname;
748: else
749: fnamecmp_type = FNAMECMP_BACKUP;
750: } else if (partial_dir && partialptr)
751: fnamecmp = partialptr;
752: else
753: fnamecmp = fname;
754: }
755:
756: /* open the file */
757: fd1 = do_open(fnamecmp, O_RDONLY, 0);
758:
759: if (fd1 == -1 && protocol_version < 29) {
760: if (fnamecmp != fname) {
761: fnamecmp = fname;
762: fd1 = do_open(fnamecmp, O_RDONLY, 0);
763: }
764:
765: if (fd1 == -1 && basis_dir[0]) {
766: /* pre-29 allowed only one alternate basis */
767: pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
768: basis_dir[0], fname);
769: fnamecmp = fnamecmpbuf;
770: fd1 = do_open(fnamecmp, O_RDONLY, 0);
771: }
772: }
773:
774: updating_basis_or_equiv = inplace
775: && (fnamecmp == fname || fnamecmp_type == FNAMECMP_BACKUP);
776:
777: if (fd1 == -1) {
778: st.st_mode = 0;
779: st.st_size = 0;
780: } else if (do_fstat(fd1,&st) != 0) {
781: rsyserr(FERROR_XFER, errno, "fstat %s failed",
782: full_fname(fnamecmp));
783: discard_receive_data(f_in, F_LENGTH(file));
784: close(fd1);
785: if (inc_recurse)
786: send_msg_int(MSG_NO_SEND, ndx);
787: continue;
788: }
789:
790: if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
791: /* this special handling for directories
792: * wouldn't be necessary if robust_rename()
793: * and the underlying robust_unlink could cope
794: * with directories
795: */
796: rprintf(FERROR_XFER, "recv_files: %s is a directory\n",
797: full_fname(fnamecmp));
798: discard_receive_data(f_in, F_LENGTH(file));
799: close(fd1);
800: if (inc_recurse)
801: send_msg_int(MSG_NO_SEND, ndx);
802: continue;
803: }
804:
805: if (fd1 != -1 && !S_ISREG(st.st_mode)) {
806: close(fd1);
807: fd1 = -1;
808: }
809:
810: /* If we're not preserving permissions, change the file-list's
811: * mode based on the local permissions and some heuristics. */
812: if (!preserve_perms) {
813: int exists = fd1 != -1;
814: #ifdef SUPPORT_ACLS
815: const char *dn = file->dirname ? file->dirname : ".";
816: if (parent_dirname != dn
817: && strcmp(parent_dirname, dn) != 0) {
818: dflt_perms = default_perms_for_dir(dn);
819: parent_dirname = dn;
820: }
821: #endif
822: file->mode = dest_mode(file->mode, st.st_mode,
823: dflt_perms, exists);
824: }
825:
826: /* We now check to see if we are writing the file "inplace" */
827: if (inplace) {
828: fd2 = do_open(fname, O_WRONLY|O_CREAT, 0600);
829: if (fd2 == -1) {
830: rsyserr(FERROR_XFER, errno, "open %s failed",
831: full_fname(fname));
832: } else if (updating_basis_or_equiv)
833: cleanup_set(NULL, NULL, file, fd1, fd2);
834: } else {
835: fd2 = open_tmpfile(fnametmp, fname, file);
836: if (fd2 != -1)
837: cleanup_set(fnametmp, partialptr, file, fd1, fd2);
838: }
839:
840: if (fd2 == -1) {
841: discard_receive_data(f_in, F_LENGTH(file));
842: if (fd1 != -1)
843: close(fd1);
844: if (inc_recurse)
845: send_msg_int(MSG_NO_SEND, ndx);
846: continue;
847: }
848:
849: /* log the transfer */
850: if (log_before_transfer)
851: log_item(FCLIENT, file, iflags, NULL);
852: else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
853: rprintf(FINFO, "%s\n", fname);
854:
855: /* recv file data */
856: recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size,
857: fname, fd2, F_LENGTH(file));
858:
859: log_item(log_code, file, iflags, NULL);
860:
861: if (fd1 != -1)
862: close(fd1);
863: if (close(fd2) < 0) {
864: rsyserr(FERROR, errno, "close failed on %s",
865: full_fname(fnametmp));
866: exit_cleanup(RERR_FILEIO);
867: }
868:
869: if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
870: if (partialptr == fname)
871: partialptr = NULL;
872: if (!finish_transfer(fname, fnametmp, fnamecmp,
873: partialptr, file, recv_ok, 1))
874: recv_ok = -1;
875: else if (fnamecmp == partialptr) {
876: do_unlink(partialptr);
877: handle_partial_dir(partialptr, PDIR_DELETE);
878: }
879: } else if (keep_partial && partialptr) {
880: if (!handle_partial_dir(partialptr, PDIR_CREATE)) {
881: rprintf(FERROR,
882: "Unable to create partial-dir for %s -- discarding %s.\n",
883: local_name ? local_name : f_name(file, NULL),
884: recv_ok ? "completed file" : "partial file");
885: do_unlink(fnametmp);
886: recv_ok = -1;
887: } else if (!finish_transfer(partialptr, fnametmp, fnamecmp, NULL,
888: file, recv_ok, !partial_dir))
889: recv_ok = -1;
890: else if (delay_updates && recv_ok) {
891: bitbag_set_bit(delayed_bits, ndx);
892: recv_ok = 2;
893: } else
894: partialptr = NULL;
895: } else
896: do_unlink(fnametmp);
897:
898: cleanup_disable();
899:
900: if (read_batch)
901: file->flags |= FLAG_FILE_SENT;
902:
903: switch (recv_ok) {
904: case 2:
905: break;
906: case 1:
907: if (remove_source_files || inc_recurse
908: || (preserve_hard_links && F_IS_HLINKED(file)))
909: send_msg_int(MSG_SUCCESS, ndx);
910: break;
911: case 0: {
912: enum logcode msgtype = redoing ? FERROR_XFER : FWARNING;
913: if (msgtype == FERROR_XFER || INFO_GTE(NAME, 1)) {
914: char *errstr, *redostr, *keptstr;
915: if (!(keep_partial && partialptr) && !inplace)
916: keptstr = "discarded";
917: else if (partial_dir)
918: keptstr = "put into partial-dir";
919: else
920: keptstr = "retained";
921: if (msgtype == FERROR_XFER) {
922: errstr = "ERROR";
923: redostr = "";
924: } else {
925: errstr = "WARNING";
926: redostr = read_batch ? " (may try again)"
927: : " (will try again)";
928: }
929: rprintf(msgtype,
930: "%s: %s failed verification -- update %s%s.\n",
931: errstr, local_name ? f_name(file, NULL) : fname,
932: keptstr, redostr);
933: }
934: if (!redoing) {
935: if (read_batch)
936: flist_ndx_push(&batch_redo_list, ndx);
937: send_msg_int(MSG_REDO, ndx);
938: file->flags |= FLAG_FILE_SENT;
939: } else if (inc_recurse)
940: send_msg_int(MSG_NO_SEND, ndx);
941: break;
942: }
943: case -1:
944: if (inc_recurse)
945: send_msg_int(MSG_NO_SEND, ndx);
946: break;
947: }
948: }
949: if (make_backups < 0)
950: make_backups = -make_backups;
951:
952: if (phase == 2 && delay_updates) /* for protocol_version < 29 */
953: handle_delayed_updates(local_name);
954:
955: if (DEBUG_GTE(RECV, 1))
956: rprintf(FINFO,"recv_files finished\n");
957:
958: return 0;
959: }
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