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) 2003-2020 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 use_db;
28: extern int db_lax;
29: extern int am_root;
30: extern int am_server;
31: extern int inc_recurse;
32: extern int log_before_transfer;
33: extern int stdout_format_has_i;
34: extern int logfile_format_has_i;
35: extern int want_xattr_optim;
36: extern int csum_length;
37: extern int read_batch;
38: extern int write_batch;
39: extern int batch_gen_fd;
40: extern int protocol_version;
41: extern int relative_paths;
42: extern int preserve_hard_links;
43: extern int preserve_perms;
44: extern int write_devices;
45: extern int preserve_xattrs;
46: extern int do_fsync;
47: extern int basis_dir_cnt;
48: extern int make_backups;
49: extern int cleanup_got_literal;
50: extern int remove_source_files;
51: extern int append_mode;
52: extern int sparse_files;
53: extern int preallocate_files;
54: extern int keep_partial;
55: extern int checksum_seed;
56: extern int checksum_files;
57: extern int whole_file;
58: extern int inplace;
59: extern int inplace_partial;
60: extern int allowed_lull;
61: extern int delay_updates;
62: extern int xfersum_type;
63: extern BOOL want_progress_now;
64: extern mode_t orig_umask;
65: extern struct stats stats;
66: extern char *tmpdir;
67: extern char *dest_filter;
68: extern char *partial_dir;
69: extern char *basis_dir[MAX_BASIS_DIRS+1];
70: extern char sender_file_sum[MAX_DIGEST_LEN];
71: extern struct file_list *cur_flist, *first_flist, *dir_flist;
72: extern filter_rule_list daemon_filter_list;
73: extern OFF_T preallocated_len;
74:
75: static struct bitbag *delayed_bits = NULL;
76: static int phase = 0, redoing = 0;
77: static flist_ndx_list batch_redo_list;
78: /* This is non-0 when we are updating the basis file or an identical copy: */
79: static int updating_basis_or_equiv;
80:
81: #define TMPNAME_SUFFIX ".XXXXXX"
82: #define TMPNAME_SUFFIX_LEN ((int)sizeof TMPNAME_SUFFIX - 1)
83: #define MAX_UNIQUE_NUMBER 999999
84: #define MAX_UNIQUE_LOOP 100
85:
86: /* get_tmpname() - create a tmp filename for a given filename
87: *
88: * If a tmpdir is defined, use that as the directory to put it in. Otherwise,
89: * the tmp filename is in the same directory as the given name. Note that
90: * there may be no directory at all in the given name!
91: *
92: * The tmp filename is basically the given filename with a dot prepended, and
93: * .XXXXXX appended (for mkstemp() to put its unique gunk in). We take care
94: * to not exceed either the MAXPATHLEN or NAME_MAX, especially the last, as
95: * the basename basically becomes 8 characters longer. In such a case, the
96: * original name is shortened sufficiently to make it all fit.
97: *
98: * If the make_unique arg is True, the XXXXXX string is replaced with a unique
99: * string that doesn't exist at the time of the check. This is intended to be
100: * used for creating hard links, symlinks, devices, and special files, since
101: * normal files should be handled by mkstemp() for safety.
102: *
103: * Of course, the only reason the file is based on the original name is to
104: * make it easier to figure out what purpose a temp file is serving when a
105: * transfer is in progress. */
106: int get_tmpname(char *fnametmp, const char *fname, BOOL make_unique)
107: {
108: int maxname, length = 0;
109: const char *f;
110: char *suf;
111:
112: if (tmpdir) {
113: /* Note: this can't overflow, so the return value is safe */
114: length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
115: fnametmp[length++] = '/';
116: }
117:
118: if ((f = strrchr(fname, '/')) != NULL) {
119: ++f;
120: if (!tmpdir) {
121: length = f - fname;
122: /* copy up to and including the slash */
123: strlcpy(fnametmp, fname, length + 1);
124: }
125: } else
126: f = fname;
127:
128: if (!tmpdir) { /* using a tmpdir avoids the leading dot on our temp names */
129: if (*f == '.') /* avoid an extra leading dot for OS X's sake */
130: f++;
131: fnametmp[length++] = '.';
132: }
133:
134: /* The maxname value is bufsize, and includes space for the '\0'.
135: * NAME_MAX needs an extra -1 for the name's leading dot. */
136: maxname = MIN(MAXPATHLEN - length - TMPNAME_SUFFIX_LEN,
137: NAME_MAX - 1 - TMPNAME_SUFFIX_LEN);
138:
139: if (maxname < 0) {
140: rprintf(FERROR_XFER, "temporary filename too long: %s\n", fname);
141: fnametmp[0] = '\0';
142: return 0;
143: }
144:
145: if (maxname) {
146: int added = strlcpy(fnametmp + length, f, maxname);
147: if (added >= maxname)
148: added = maxname - 1;
149: suf = fnametmp + length + added;
150:
151: /* Trim any dangling high-bit chars if the first-trimmed char (if any) is
152: * also a high-bit char, just in case we cut into a multi-byte sequence.
153: * We are guaranteed to stop because of the leading '.' we added. */
154: if ((int)f[added] & 0x80) {
155: while ((int)suf[-1] & 0x80)
156: suf--;
157: }
158: /* trim one trailing dot before our suffix's dot */
159: if (suf[-1] == '.')
160: suf--;
161: } else
162: suf = fnametmp + length - 1; /* overwrite the leading dot with suffix's dot */
163:
164: if (make_unique) {
165: static unsigned counter_limit;
166: unsigned counter;
167:
168: if (!counter_limit) {
169: counter_limit = (unsigned)getpid() + MAX_UNIQUE_LOOP;
170: if (counter_limit > MAX_UNIQUE_NUMBER || counter_limit < MAX_UNIQUE_LOOP)
171: counter_limit = MAX_UNIQUE_LOOP;
172: }
173: counter = counter_limit - MAX_UNIQUE_LOOP;
174:
175: /* This doesn't have to be very good because we don't need
176: * to worry about someone trying to guess the values: all
177: * a conflict will do is cause a device, special file, hard
178: * link, or symlink to fail to be created. Also: avoid
179: * using mktemp() due to gcc's annoying warning. */
180: while (1) {
181: snprintf(suf, TMPNAME_SUFFIX_LEN+1, ".%d", counter);
182: if (access(fnametmp, 0) < 0)
183: break;
184: if (++counter >= counter_limit)
185: return 0;
186: }
187: } else
188: memcpy(suf, TMPNAME_SUFFIX, TMPNAME_SUFFIX_LEN+1);
189:
190: return 1;
191: }
192:
193: /* Opens a temporary file for writing.
194: * Success: Writes name into fnametmp, returns fd.
195: * Failure: Clobbers fnametmp, returns -1.
196: * Calling cleanup_set() is the caller's job. */
197: int open_tmpfile(char *fnametmp, const char *fname, struct file_struct *file)
198: {
199: int fd;
200: mode_t added_perms;
201:
202: if (!get_tmpname(fnametmp, fname, False))
203: return -1;
204:
205: if (am_root < 0) {
206: /* For --fake-super, the file must be useable by the copying
207: * user, just like it would be for root. */
208: added_perms = S_IRUSR|S_IWUSR;
209: } else {
210: /* For a normal copy, we need to be able to tweak things like xattrs. */
211: added_perms = S_IWUSR;
212: }
213:
214: /* We initially set the perms without the setuid/setgid bits or group
215: * access to ensure that there is no race condition. They will be
216: * correctly updated after the right owner and group info is set.
217: * (Thanks to snabb@epipe.fi for pointing this out.) */
218: fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
219:
220: #if 0
221: /* In most cases parent directories will already exist because their
222: * information should have been previously transferred, but that may
223: * not be the case with -R */
224: if (fd == -1 && relative_paths && errno == ENOENT
225: && make_path(fnametmp, ACCESSPERMS, MKP_SKIP_SLASH | MKP_DROP_NAME) == 0) {
226: /* Get back to name with XXXXXX in it. */
227: get_tmpname(fnametmp, fname, False);
228: fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
229: }
230: #endif
231:
232: if (fd == -1) {
233: rsyserr(FERROR_XFER, errno, "mkstemp %s failed",
234: full_fname(fnametmp));
235: return -1;
236: }
237:
238: return fd;
239: }
240:
241: static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
242: const char *fname, int fd, struct file_struct *file, int inplace_sizing)
243: {
244: static char file_sum1[MAX_DIGEST_LEN];
245: struct map_struct *mapbuf;
246: struct sum_struct sum;
247: int sum_len;
248: int32 len;
249: OFF_T total_size = F_LENGTH(file);
250: OFF_T offset = 0;
251: OFF_T offset2;
252: char *data;
253: int32 i;
254: char *map = NULL;
255:
256: #ifdef SUPPORT_PREALLOCATION
257: if (preallocate_files && fd != -1 && total_size > 0 && (!inplace_sizing || total_size > size_r)) {
258: /* Try to preallocate enough space for file's eventual length. Can
259: * reduce fragmentation on filesystems like ext4, xfs, and NTFS. */
260: if ((preallocated_len = do_fallocate(fd, 0, total_size)) < 0)
261: rsyserr(FWARNING, errno, "do_fallocate %s", full_fname(fname));
262: } else
263: #endif
264: if (inplace_sizing) {
265: #ifdef HAVE_FTRUNCATE
266: /* The most compatible way to create a sparse file is to start with no length. */
267: if (sparse_files > 0 && whole_file && fd >= 0 && do_ftruncate(fd, 0) == 0)
268: preallocated_len = 0;
269: else
270: #endif
271: preallocated_len = size_r;
272: } else
273: preallocated_len = 0;
274:
275: read_sum_head(f_in, &sum);
276:
277: if (fd_r >= 0 && size_r > 0) {
278: int32 read_size = MAX(sum.blength * 2, 16*1024);
279: mapbuf = map_file(fd_r, size_r, read_size, sum.blength);
280: if (DEBUG_GTE(DELTASUM, 2)) {
281: rprintf(FINFO, "recv mapped %s of size %s\n",
282: fname_r, big_num(size_r));
283: }
284: } else
285: mapbuf = NULL;
286:
287: sum_init(xfersum_type, checksum_seed);
288:
289: if (append_mode > 0) {
290: OFF_T j;
291: sum.flength = (OFF_T)sum.count * sum.blength;
292: if (sum.remainder)
293: sum.flength -= sum.blength - sum.remainder;
294: if (append_mode == 2 && mapbuf) {
295: for (j = CHUNK_SIZE; j < sum.flength; j += CHUNK_SIZE) {
296: if (INFO_GTE(PROGRESS, 1))
297: show_progress(offset, total_size);
298: sum_update(map_ptr(mapbuf, offset, CHUNK_SIZE),
299: CHUNK_SIZE);
300: offset = j;
301: }
302: if (offset < sum.flength) {
303: int32 len = (int32)(sum.flength - offset);
304: if (INFO_GTE(PROGRESS, 1))
305: show_progress(offset, total_size);
306: sum_update(map_ptr(mapbuf, offset, len), len);
307: }
308: }
309: offset = sum.flength;
310: if (fd != -1 && (j = do_lseek(fd, offset, SEEK_SET)) != offset) {
311: rsyserr(FERROR_XFER, errno, "lseek of %s returned %s, not %s",
312: full_fname(fname), big_num(j), big_num(offset));
313: exit_cleanup(RERR_FILEIO);
314: }
315: }
316:
317: while ((i = recv_token(f_in, &data)) != 0) {
318: if (INFO_GTE(PROGRESS, 1))
319: show_progress(offset, total_size);
320:
321: if (allowed_lull)
322: maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH | MSK_ACTIVE_RECEIVER);
323:
324: if (i > 0) {
325: if (DEBUG_GTE(DELTASUM, 3)) {
326: rprintf(FINFO,"data recv %d at %s\n",
327: i, big_num(offset));
328: }
329:
330: stats.literal_data += i;
331: cleanup_got_literal = 1;
332:
333: sum_update(data, i);
334:
335: if (fd != -1 && write_file(fd, 0, offset, data, i) != i)
336: goto report_write_error;
337: offset += i;
338: continue;
339: }
340:
341: i = -(i+1);
342: offset2 = i * (OFF_T)sum.blength;
343: len = sum.blength;
344: if (i == (int)sum.count-1 && sum.remainder != 0)
345: len = sum.remainder;
346:
347: stats.matched_data += len;
348:
349: if (DEBUG_GTE(DELTASUM, 3)) {
350: rprintf(FINFO,
351: "chunk[%d] of size %ld at %s offset=%s%s\n",
352: i, (long)len, big_num(offset2), big_num(offset),
353: updating_basis_or_equiv && offset == offset2 ? " (seek)" : "");
354: }
355:
356: if (mapbuf) {
357: map = map_ptr(mapbuf,offset2,len);
358:
359: see_token(map, len);
360: sum_update(map, len);
361: }
362:
363: if (updating_basis_or_equiv) {
364: if (offset == offset2 && fd != -1) {
365: if (skip_matched(fd, offset, map, len) < 0)
366: goto report_write_error;
367: offset += len;
368: continue;
369: }
370: }
371: if (fd != -1 && map && write_file(fd, 0, offset, map, len) != (int)len)
372: goto report_write_error;
373: offset += len;
374: }
375:
376: if (fd != -1 && offset > 0) {
377: if (sparse_files > 0) {
378: if (sparse_end(fd, offset) != 0)
379: goto report_write_error;
380: } else if (flush_write_file(fd) < 0) {
381: report_write_error:
382: rsyserr(FERROR_XFER, errno, "write failed on %s", full_fname(fname));
383: exit_cleanup(RERR_FILEIO);
384: }
385: }
386:
387: #ifdef HAVE_FTRUNCATE
388: /* inplace: New data could be shorter than old data.
389: * preallocate_files: total_size could have been an overestimate.
390: * Cut off any extra preallocated zeros from dest file. */
391: if ((inplace_sizing || preallocated_len > offset) && fd != -1 && !IS_DEVICE(file->mode)) {
392: if (do_ftruncate(fd, offset) < 0)
393: rsyserr(FERROR_XFER, errno, "ftruncate failed on %s", full_fname(fname));
394: }
395: #endif
396:
397: if (INFO_GTE(PROGRESS, 1))
398: end_progress(total_size);
399:
400: sum_len = sum_end(file_sum1);
401:
402: if (do_fsync && fd != -1 && fsync(fd) != 0) {
403: rsyserr(FERROR, errno, "fsync failed on %s",
404: full_fname(fname));
405: exit_cleanup(RERR_FILEIO);
406: }
407:
408: if (mapbuf)
409: unmap_file(mapbuf);
410:
411: read_buf(f_in, sender_file_sum, sum_len);
412: if (DEBUG_GTE(DELTASUM, 2))
413: rprintf(FINFO,"got file_sum\n");
414: if (fd != -1 && memcmp(file_sum1, sender_file_sum, sum_len) != 0)
415: return 0;
416: return 1;
417: }
418:
419:
420: static void discard_receive_data(int f_in, struct file_struct *file)
421: {
422: receive_data(f_in, NULL, -1, 0, NULL, -1, file, 0);
423: }
424:
425: static void handle_delayed_updates(char *local_name)
426: {
427: char *fname, *partialptr;
428: int ndx;
429:
430: for (ndx = -1; (ndx = bitbag_next_bit(delayed_bits, ndx)) >= 0; ) {
431: struct file_struct *file = cur_flist->files[ndx];
432: fname = local_name ? local_name : f_name(file, NULL);
433: if ((partialptr = partial_dir_fname(fname)) != NULL) {
434: if (make_backups > 1 && !make_backup(fname, False))
435: continue;
436: if (DEBUG_GTE(RECV, 1)) {
437: rprintf(FINFO, "renaming %s to %s\n",
438: partialptr, fname);
439: }
440: /* We don't use robust_rename() here because the
441: * partial-dir must be on the same drive. */
442: if (do_rename(partialptr, fname) < 0) {
443: rsyserr(FERROR_XFER, errno,
444: "rename failed for %s (from %s)",
445: full_fname(fname), partialptr);
446: } else {
447: if (remove_source_files || checksum_files & CSF_UPDATE
448: || (preserve_hard_links && F_IS_HLINKED(file)))
449: send_msg_int(MSG_SUCCESS, ndx);
450: handle_partial_dir(partialptr, PDIR_DELETE);
451: }
452: }
453: }
454: }
455:
456: static void no_batched_update(int ndx, BOOL is_redo)
457: {
458: struct file_list *flist = flist_for_ndx(ndx, "no_batched_update");
459: struct file_struct *file = flist->files[ndx - flist->ndx_start];
460:
461: rprintf(FERROR_XFER, "(No batched update for%s \"%s\")\n",
462: is_redo ? " resend of" : "", f_name(file, NULL));
463:
464: if (inc_recurse && !dry_run)
465: send_msg_int(MSG_NO_SEND, ndx);
466: }
467:
468: static int we_want_redo(int desired_ndx)
469: {
470: static int redo_ndx = -1;
471:
472: while (redo_ndx < desired_ndx) {
473: if (redo_ndx >= 0)
474: no_batched_update(redo_ndx, True);
475: if ((redo_ndx = flist_ndx_pop(&batch_redo_list)) < 0)
476: return 0;
477: }
478:
479: if (redo_ndx == desired_ndx) {
480: redo_ndx = -1;
481: return 1;
482: }
483:
484: return 0;
485: }
486:
487: static int gen_wants_ndx(int desired_ndx, int flist_num)
488: {
489: static int next_ndx = -1;
490: static int done_cnt = 0;
491: static BOOL got_eof = False;
492:
493: if (got_eof)
494: return 0;
495:
496: /* TODO: integrate gen-reading I/O into perform_io() so this is not needed? */
497: io_flush(FULL_FLUSH);
498:
499: while (next_ndx < desired_ndx) {
500: if (inc_recurse && flist_num <= done_cnt)
501: return 0;
502: if (next_ndx >= 0)
503: no_batched_update(next_ndx, False);
504: if ((next_ndx = read_int(batch_gen_fd)) < 0) {
505: if (inc_recurse) {
506: done_cnt++;
507: continue;
508: }
509: got_eof = True;
510: return 0;
511: }
512: }
513:
514: if (next_ndx == desired_ndx) {
515: next_ndx = -1;
516: return 1;
517: }
518:
519: return 0;
520: }
521:
522: /**
523: * main routine for receiver process.
524: *
525: * Receiver process runs on the same host as the generator process. */
526: int recv_files(int f_in, int f_out, char *local_name)
527: {
528: int fd1,fd2;
529: STRUCT_STAT st;
530: int iflags, xlen;
531: char *fname, fbuf[MAXPATHLEN];
532: char xname[MAXPATHLEN];
533: char *fnametmp, fnametmpbuf[MAXPATHLEN];
534: char *fnamecmp, *partialptr;
535: char fnamecmpbuf[MAXPATHLEN];
536: char *filter_argv[MAX_FILTER_ARGS + 1];
537: uchar fnamecmp_type;
538: struct file_struct *file;
539: int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
540: enum logcode log_code = log_before_transfer ? FLOG : FINFO;
541: int max_phase = protocol_version >= 29 ? 2 : 1;
542: int dflt_perms = (ACCESSPERMS & ~orig_umask);
543: #ifdef SUPPORT_ACLS
544: const char *parent_dirname = "";
545: #endif
546: int ndx, recv_ok, one_inplace;
547: pid_t pid = 0;
548:
549: if (DEBUG_GTE(RECV, 1))
550: rprintf(FINFO, "recv_files(%d) starting\n", cur_flist->used);
551:
552: if (delay_updates)
553: delayed_bits = bitbag_create(cur_flist->used + 1);
554:
555: if (use_db && (append_mode == 1 || protocol_version < 30))
556: use_db = 0; /* We can't note finished md5 values */
557:
558: if (dest_filter) {
559: char *p;
560: char *sep = " \t";
561: int i;
562: for (p = strtok(dest_filter, sep), i = 0;
563: p && i < MAX_FILTER_ARGS;
564: p = strtok(0, sep))
565: filter_argv[i++] = p;
566: filter_argv[i] = NULL;
567: if (p) {
568: rprintf(FERROR,
569: "Too many arguments to dest-filter (> %d)\n",
570: MAX_FILTER_ARGS);
571: exit_cleanup(RERR_SYNTAX);
572: }
573: }
574:
575: progress_init();
576:
577: while (1) {
578: cleanup_disable();
579:
580: /* This call also sets cur_flist. */
581: ndx = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type,
582: xname, &xlen);
583: if (ndx == NDX_DONE) {
584: if (!am_server && cur_flist) {
585: set_current_file_index(NULL, 0);
586: if (INFO_GTE(PROGRESS, 2))
587: end_progress(0);
588: }
589: if (inc_recurse && first_flist) {
590: if (read_batch) {
591: ndx = first_flist->used + first_flist->ndx_start;
592: gen_wants_ndx(ndx, first_flist->flist_num);
593: }
594: flist_free(first_flist);
595: if (first_flist)
596: continue;
597: } else if (read_batch && first_flist) {
598: ndx = first_flist->used;
599: gen_wants_ndx(ndx, first_flist->flist_num);
600: }
601: if (++phase > max_phase)
602: break;
603: if (DEBUG_GTE(RECV, 1))
604: rprintf(FINFO, "recv_files phase=%d\n", phase);
605: if (phase == 2 && delay_updates)
606: handle_delayed_updates(local_name);
607: write_int(f_out, NDX_DONE);
608: continue;
609: }
610:
611: if (ndx - cur_flist->ndx_start >= 0)
612: file = cur_flist->files[ndx - cur_flist->ndx_start];
613: else
614: file = dir_flist->files[cur_flist->parent_ndx];
615: fname = local_name ? local_name : f_name(file, fbuf);
616:
617: if (DEBUG_GTE(RECV, 1))
618: rprintf(FINFO, "recv_files(%s)\n", fname);
619:
620: if (daemon_filter_list.head && (*fname != '.' || fname[1] != '\0')
621: && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
622: rprintf(FERROR, "attempt to hack rsync failed.\n");
623: exit_cleanup(RERR_PROTOCOL);
624: }
625:
626: #ifdef SUPPORT_XATTRS
627: if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
628: && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE)))
629: recv_xattr_request(file, f_in);
630: #endif
631:
632: if (!(iflags & ITEM_TRANSFER)) {
633: maybe_log_item(file, iflags, itemizing, xname);
634: #ifdef SUPPORT_XATTRS
635: if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
636: && !BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
637: set_file_attrs(fname, file, NULL, fname, 0);
638: #endif
639: if (iflags & ITEM_IS_NEW) {
640: stats.created_files++;
641: if (S_ISREG(file->mode)) {
642: /* Nothing further to count. */
643: } else if (S_ISDIR(file->mode))
644: stats.created_dirs++;
645: #ifdef SUPPORT_LINKS
646: else if (S_ISLNK(file->mode))
647: stats.created_symlinks++;
648: #endif
649: else if (IS_DEVICE(file->mode))
650: stats.created_devices++;
651: else
652: stats.created_specials++;
653: }
654: continue;
655: }
656: if (phase == 2) {
657: rprintf(FERROR,
658: "got transfer request in phase 2 [%s]\n",
659: who_am_i());
660: exit_cleanup(RERR_PROTOCOL);
661: }
662:
663: if (file->flags & FLAG_FILE_SENT) {
664: if (csum_length == SHORT_SUM_LENGTH) {
665: if (keep_partial && !partial_dir)
666: make_backups = -make_backups; /* prevents double backup */
667: if (append_mode)
668: sparse_files = -sparse_files;
669: append_mode = -append_mode;
670: csum_length = SUM_LENGTH;
671: redoing = 1;
672: }
673: } else {
674: if (csum_length != SHORT_SUM_LENGTH) {
675: if (keep_partial && !partial_dir)
676: make_backups = -make_backups;
677: if (append_mode)
678: sparse_files = -sparse_files;
679: append_mode = -append_mode;
680: csum_length = SHORT_SUM_LENGTH;
681: redoing = 0;
682: }
683: if (iflags & ITEM_IS_NEW)
684: stats.created_files++;
685: }
686:
687: if (!am_server)
688: set_current_file_index(file, ndx);
689: stats.xferred_files++;
690: stats.total_transferred_size += F_LENGTH(file);
691:
692: cleanup_got_literal = 0;
693:
694: if (read_batch) {
695: int wanted = redoing
696: ? we_want_redo(ndx)
697: : gen_wants_ndx(ndx, cur_flist->flist_num);
698: if (!wanted) {
699: rprintf(FINFO,
700: "(Skipping batched update for%s \"%s\")\n",
701: redoing ? " resend of" : "",
702: fname);
703: discard_receive_data(f_in, file);
704: file->flags |= FLAG_FILE_SENT;
705: continue;
706: }
707: }
708:
709: remember_initial_stats();
710:
711: if (!do_xfers) { /* log the transfer */
712: log_item(FCLIENT, file, iflags, NULL);
713: if (read_batch)
714: discard_receive_data(f_in, file);
715: continue;
716: }
717: if (write_batch < 0) {
718: log_item(FCLIENT, file, iflags, NULL);
719: if (!am_server)
720: discard_receive_data(f_in, file);
721: if (inc_recurse)
722: send_msg_int(MSG_SUCCESS, ndx);
723: continue;
724: }
725:
726: partialptr = partial_dir ? partial_dir_fname(fname) : fname;
727:
728: if (protocol_version >= 29) {
729: switch (fnamecmp_type) {
730: case FNAMECMP_FNAME:
731: fnamecmp = fname;
732: break;
733: case FNAMECMP_PARTIAL_DIR:
734: fnamecmp = partialptr;
735: break;
736: case FNAMECMP_BACKUP:
737: fnamecmp = get_backup_name(fname);
738: break;
739: case FNAMECMP_FUZZY:
740: if (file->dirname) {
741: pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, file->dirname, xname);
742: fnamecmp = fnamecmpbuf;
743: } else
744: fnamecmp = xname;
745: break;
746: default:
747: if (fnamecmp_type > FNAMECMP_FUZZY && fnamecmp_type-FNAMECMP_FUZZY <= basis_dir_cnt) {
748: fnamecmp_type -= FNAMECMP_FUZZY + 1;
749: if (file->dirname) {
750: stringjoin(fnamecmpbuf, sizeof fnamecmpbuf,
751: basis_dir[fnamecmp_type], "/", file->dirname, "/", xname, NULL);
752: } else
753: pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], xname);
754: } else if (fnamecmp_type >= basis_dir_cnt) {
755: rprintf(FERROR,
756: "invalid basis_dir index: %d.\n",
757: fnamecmp_type);
758: exit_cleanup(RERR_PROTOCOL);
759: } else
760: pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], fname);
761: fnamecmp = fnamecmpbuf;
762: break;
763: }
764: if (!fnamecmp || (daemon_filter_list.head
765: && check_filter(&daemon_filter_list, FLOG, fnamecmp, 0) < 0)) {
766: fnamecmp = fname;
767: fnamecmp_type = FNAMECMP_FNAME;
768: }
769: } else {
770: /* Reminder: --inplace && --partial-dir are never
771: * enabled at the same time. */
772: if (inplace && make_backups > 1) {
773: if (!(fnamecmp = get_backup_name(fname)))
774: fnamecmp = fname;
775: else
776: fnamecmp_type = FNAMECMP_BACKUP;
777: } else if (partial_dir && partialptr)
778: fnamecmp = partialptr;
779: else
780: fnamecmp = fname;
781: }
782:
783: /* open the file */
784: fd1 = do_open(fnamecmp, O_RDONLY, 0);
785:
786: if (fd1 == -1 && protocol_version < 29) {
787: if (fnamecmp != fname) {
788: fnamecmp = fname;
789: fnamecmp_type = FNAMECMP_FNAME;
790: fd1 = do_open(fnamecmp, O_RDONLY, 0);
791: }
792:
793: if (fd1 == -1 && basis_dir[0]) {
794: /* pre-29 allowed only one alternate basis */
795: pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
796: basis_dir[0], fname);
797: fnamecmp = fnamecmpbuf;
798: fnamecmp_type = FNAMECMP_BASIS_DIR_LOW;
799: fd1 = do_open(fnamecmp, O_RDONLY, 0);
800: }
801: }
802:
803: one_inplace = inplace_partial && fnamecmp_type == FNAMECMP_PARTIAL_DIR;
804: updating_basis_or_equiv = one_inplace
805: || (inplace && (fnamecmp == fname || fnamecmp_type == FNAMECMP_BACKUP));
806:
807: if (fd1 == -1) {
808: st.st_mode = 0;
809: st.st_size = 0;
810: } else if (do_fstat(fd1,&st) != 0) {
811: rsyserr(FERROR_XFER, errno, "fstat %s failed",
812: full_fname(fnamecmp));
813: discard_receive_data(f_in, file);
814: close(fd1);
815: if (inc_recurse)
816: send_msg_int(MSG_NO_SEND, ndx);
817: continue;
818: }
819:
820: if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
821: /* this special handling for directories
822: * wouldn't be necessary if robust_rename()
823: * and the underlying robust_unlink could cope
824: * with directories
825: */
826: rprintf(FERROR_XFER, "recv_files: %s is a directory\n",
827: full_fname(fnamecmp));
828: discard_receive_data(f_in, file);
829: close(fd1);
830: if (inc_recurse)
831: send_msg_int(MSG_NO_SEND, ndx);
832: continue;
833: }
834:
835: if (fd1 != -1 && !(S_ISREG(st.st_mode) || (write_devices && IS_DEVICE(st.st_mode)))) {
836: close(fd1);
837: fd1 = -1;
838: }
839:
840: if (fd1 != -1 && IS_DEVICE(st.st_mode) && st.st_size == 0)
841: st.st_size = get_device_size(fd1, fname);
842:
843: /* If we're not preserving permissions, change the file-list's
844: * mode based on the local permissions and some heuristics. */
845: if (!preserve_perms) {
846: int exists = fd1 != -1;
847: #ifdef SUPPORT_ACLS
848: const char *dn = file->dirname ? file->dirname : ".";
849: if (parent_dirname != dn
850: && strcmp(parent_dirname, dn) != 0) {
851: dflt_perms = default_perms_for_dir(dn);
852: parent_dirname = dn;
853: }
854: #endif
855: file->mode = dest_mode(file->mode, st.st_mode, dflt_perms, exists);
856: }
857:
858: /* We now check to see if we are writing the file "inplace" */
859: if (inplace || one_inplace) {
860: fnametmp = one_inplace ? partialptr : fname;
861: fd2 = do_open(fnametmp, O_WRONLY|O_CREAT, 0600);
862: if (fd2 == -1) {
863: rsyserr(FERROR_XFER, errno, "open %s failed",
864: full_fname(fnametmp));
865: } else if (updating_basis_or_equiv)
866: cleanup_set(NULL, NULL, file, fd1, fd2);
867: } else {
868: fnametmp = fnametmpbuf;
869: fd2 = open_tmpfile(fnametmp, fname, file);
870: if (fd2 != -1)
871: cleanup_set(fnametmp, partialptr, file, fd1, fd2);
872: }
873:
874: if (fd2 == -1) {
875: discard_receive_data(f_in, file);
876: if (fd1 != -1)
877: close(fd1);
878: if (inc_recurse)
879: send_msg_int(MSG_NO_SEND, ndx);
880: continue;
881: }
882:
883: /* log the transfer */
884: if (log_before_transfer)
885: log_item(FCLIENT, file, iflags, NULL);
886: else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
887: rprintf(FINFO, "%s\n", fname);
888:
889: if (dest_filter)
890: pid = run_filter(filter_argv, fd2, &fd2);
891:
892: /* recv file data */
893: recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size, fname, fd2, file, inplace || one_inplace);
894:
895: log_item(log_code, file, iflags, NULL);
896: if (want_progress_now)
897: instant_progress(fname);
898:
899: if (fd1 != -1)
900: close(fd1);
901: if (close(fd2) < 0) {
902: rsyserr(FERROR, errno, "close failed on %s",
903: full_fname(fnametmp));
904: exit_cleanup(RERR_FILEIO);
905: }
906:
907: if (dest_filter) {
908: int status;
909: wait_process_with_flush(pid, &status);
910: if (status != 0) {
911: rprintf(FERROR, "filter %s exited code: %d\n",
912: dest_filter, status);
913: continue;
914: }
915: }
916:
917: if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
918: if (partialptr == fname)
919: partialptr = NULL;
920: if (!finish_transfer(fname, fnametmp, fnamecmp, partialptr, file, recv_ok, 1))
921: recv_ok = -1;
922: else if (fnamecmp == partialptr) {
923: if (!one_inplace)
924: do_unlink(partialptr);
925: handle_partial_dir(partialptr, PDIR_DELETE);
926: }
927: if (use_db && do_lstat(fname, &st) == 0)
928: db_set_checksum(5, &st, sender_file_sum);
929: } else if (keep_partial && partialptr && !one_inplace) {
930: if (!handle_partial_dir(partialptr, PDIR_CREATE)) {
931: rprintf(FERROR,
932: "Unable to create partial-dir for %s -- discarding %s.\n",
933: local_name ? local_name : f_name(file, NULL),
934: recv_ok ? "completed file" : "partial file");
935: do_unlink(fnametmp);
936: recv_ok = -1;
937: } else if (!finish_transfer(partialptr, fnametmp, fnamecmp, NULL,
938: file, recv_ok, !partial_dir))
939: recv_ok = -1;
940: else if (delay_updates && recv_ok) {
941: bitbag_set_bit(delayed_bits, ndx);
942: if (use_db && do_lstat(partialptr, &st) == 0)
943: db_set_checksum(5, &st, sender_file_sum);
944: recv_ok = 2;
945: } else
946: partialptr = NULL;
947: } else if (!one_inplace)
948: do_unlink(fnametmp);
949:
950: cleanup_disable();
951:
952: if (read_batch)
953: file->flags |= FLAG_FILE_SENT;
954:
955: switch (recv_ok) {
956: case 2:
957: break;
958: case 1:
959: if (remove_source_files || inc_recurse || checksum_files & CSF_UPDATE
960: || (preserve_hard_links && F_IS_HLINKED(file)))
961: send_msg_int(MSG_SUCCESS, ndx);
962: break;
963: case 0: {
964: enum logcode msgtype = redoing ? FERROR_XFER : FWARNING;
965: if (msgtype == FERROR_XFER || INFO_GTE(NAME, 1)) {
966: char *errstr, *redostr, *keptstr;
967: if (!(keep_partial && partialptr) && !inplace)
968: keptstr = "discarded";
969: else if (partial_dir)
970: keptstr = "put into partial-dir";
971: else
972: keptstr = "retained";
973: if (msgtype == FERROR_XFER) {
974: errstr = "ERROR";
975: redostr = "";
976: } else {
977: errstr = "WARNING";
978: redostr = read_batch ? " (may try again)"
979: : " (will try again)";
980: }
981: rprintf(msgtype,
982: "%s: %s failed verification -- update %s%s.\n",
983: errstr, local_name ? f_name(file, NULL) : fname,
984: keptstr, redostr);
985: }
986: if (!redoing) {
987: if (read_batch)
988: flist_ndx_push(&batch_redo_list, ndx);
989: send_msg_int(MSG_REDO, ndx);
990: file->flags |= FLAG_FILE_SENT;
991: } else if (inc_recurse)
992: send_msg_int(MSG_NO_SEND, ndx);
993: break;
994: }
995: case -1:
996: if (inc_recurse)
997: send_msg_int(MSG_NO_SEND, ndx);
998: break;
999: }
1000: }
1001: if (make_backups < 0)
1002: make_backups = -make_backups;
1003:
1004: if (phase == 2 && delay_updates) /* for protocol_version < 29 */
1005: handle_delayed_updates(local_name);
1006:
1007: if (DEBUG_GTE(RECV, 1))
1008: rprintf(FINFO,"recv_files finished\n");
1009:
1010: return 0;
1011: }
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