Commit | Line | Data |
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ef1aa910 | 1 | /* -*- c-file-style: "linux" -*- |
91262d5d MP |
2 | |
3 | rsync -- fast file replication program | |
2cda2560 WD |
4 | |
5 | Copyright (C) 1996-2000 by Andrew Tridgell | |
2f03f956 | 6 | Copyright (C) Paul Mackerras 1996 |
91262d5d | 7 | Copyright (C) 2002 by Martin Pool <mbp@samba.org> |
2cda2560 | 8 | |
2f03f956 AT |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
2cda2560 | 13 | |
2f03f956 AT |
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. | |
2cda2560 | 18 | |
2f03f956 AT |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | */ | |
23 | ||
24 | #include "rsync.h" | |
25 | ||
26 | extern int verbose; | |
27 | extern int dry_run; | |
28 | extern int relative_paths; | |
716e73d4 | 29 | extern int keep_dirlinks; |
2f03f956 AT |
30 | extern int preserve_links; |
31 | extern int am_root; | |
32 | extern int preserve_devices; | |
33 | extern int preserve_hard_links; | |
6744b62d WD |
34 | extern int preserve_perms; |
35 | extern int preserve_uid; | |
36 | extern int preserve_gid; | |
2f03f956 | 37 | extern int update_only; |
3d6feada | 38 | extern int opt_ignore_existing; |
cd6aa5b5 WD |
39 | extern int inplace; |
40 | extern int make_backups; | |
2f03f956 AT |
41 | extern int csum_length; |
42 | extern int ignore_times; | |
f83f0548 | 43 | extern int size_only; |
7d1bfaf7 | 44 | extern OFF_T max_size; |
2f03f956 | 45 | extern int io_timeout; |
d04e9c51 | 46 | extern int protocol_version; |
2f03f956 | 47 | extern int always_checksum; |
a7260c40 | 48 | extern char *partial_dir; |
b7e8628c WD |
49 | extern char *basis_dir[]; |
50 | extern int copy_dest; | |
59c95e42 | 51 | extern int link_dest; |
5774786f WD |
52 | extern int whole_file; |
53 | extern int local_server; | |
5774786f | 54 | extern int list_only; |
b9f592fb | 55 | extern int read_batch; |
5774786f WD |
56 | extern int only_existing; |
57 | extern int orig_umask; | |
58 | extern int safe_symlinks; | |
a255c592 | 59 | extern long block_size; /* "long" because popt can't set an int32. */ |
2f03f956 | 60 | |
97f9dcae WD |
61 | extern struct exclude_list_struct server_exclude_list; |
62 | ||
b7e8628c | 63 | static int unchanged_attrs(struct file_struct *file, STRUCT_STAT *st) |
2f03f956 | 64 | { |
b7e8628c WD |
65 | if (preserve_perms |
66 | && (st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS)) | |
84acca07 | 67 | return 0; |
bb24028f | 68 | |
b7e8628c WD |
69 | if (am_root && preserve_uid && st->st_uid != file->uid) |
70 | return 0; | |
bb24028f | 71 | |
b7e8628c WD |
72 | if (preserve_gid && file->gid != GID_NONE && st->st_gid != file->gid) |
73 | return 0; | |
74 | ||
75 | return 1; | |
76 | } | |
77 | ||
78 | /* Perform our quick-check heuristic for determining if a file is unchanged. */ | |
79 | static int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st) | |
80 | { | |
81 | if (st->st_size != file->length) | |
82 | return 0; | |
59c95e42 | 83 | |
2cda2560 | 84 | /* if always checksum is set then we use the checksum instead |
2f03f956 AT |
85 | of the file time to determine whether to sync */ |
86 | if (always_checksum && S_ISREG(st->st_mode)) { | |
87 | char sum[MD4_SUM_LENGTH]; | |
b7e8628c | 88 | file_checksum(fn, sum, st->st_size); |
728d0922 | 89 | return memcmp(sum, file->u.sum, protocol_version < 21 ? 2 |
84acca07 | 90 | : MD4_SUM_LENGTH) == 0; |
2f03f956 AT |
91 | } |
92 | ||
cc1e997d | 93 | if (size_only) |
84acca07 | 94 | return 1; |
2f03f956 | 95 | |
cc1e997d | 96 | if (ignore_times) |
84acca07 | 97 | return 0; |
cc1e997d | 98 | |
84acca07 | 99 | return cmp_modtime(st->st_mtime, file->modtime) == 0; |
2f03f956 AT |
100 | } |
101 | ||
102 | ||
2f03f956 | 103 | /* |
0e36d9da | 104 | * NULL sum_struct means we have no checksums |
195bd906 | 105 | */ |
fc0257c9 | 106 | void write_sum_head(int f, struct sum_struct *sum) |
2f03f956 | 107 | { |
fc0257c9 S |
108 | static struct sum_struct null_sum; |
109 | ||
c338460d | 110 | if (sum == NULL) |
fc0257c9 S |
111 | sum = &null_sum; |
112 | ||
113 | write_int(f, sum->count); | |
114 | write_int(f, sum->blength); | |
d04e9c51 | 115 | if (protocol_version >= 27) |
fc0257c9 S |
116 | write_int(f, sum->s2length); |
117 | write_int(f, sum->remainder); | |
2f03f956 AT |
118 | } |
119 | ||
ec8290c8 | 120 | /* |
195bd906 | 121 | * set (initialize) the size entries in the per-file sum_struct |
ec8290c8 | 122 | * calculating dynamic block and checksum sizes. |
195bd906 | 123 | * |
ec8290c8 | 124 | * This is only called from generate_and_send_sums() but is a separate |
195bd906 S |
125 | * function to encapsulate the logic. |
126 | * | |
127 | * The block size is a rounded square root of file length. | |
128 | * | |
129 | * The checksum size is determined according to: | |
130 | * blocksum_bits = BLOCKSUM_EXP + 2*log2(file_len) - log2(block_len) | |
131 | * provided by Donovan Baarda which gives a probability of rsync | |
132 | * algorithm corrupting data and falling back using the whole md4 | |
133 | * checksums. | |
134 | * | |
135 | * This might be made one of several selectable heuristics. | |
136 | */ | |
423dba8e | 137 | static void sum_sizes_sqroot(struct sum_struct *sum, uint64 len) |
195bd906 | 138 | { |
a255c592 | 139 | int32 blength; |
da9d12f5 | 140 | int s2length; |
195bd906 | 141 | |
a255c592 | 142 | if (block_size) |
195bd906 | 143 | blength = block_size; |
a255c592 | 144 | else if (len <= BLOCK_SIZE * BLOCK_SIZE) |
195bd906 | 145 | blength = BLOCK_SIZE; |
a255c592 WD |
146 | else { |
147 | int32 c; | |
148 | uint64 l; | |
149 | for (c = 1, l = len; l >>= 2; c <<= 1) { | |
150 | assert(c > 0); | |
195bd906 S |
151 | } |
152 | blength = 0; | |
153 | do { | |
154 | blength |= c; | |
fb55e28d | 155 | if (len < (uint64)blength * blength) |
195bd906 S |
156 | blength &= ~c; |
157 | c >>= 1; | |
158 | } while (c >= 8); /* round to multiple of 8 */ | |
159 | blength = MAX(blength, BLOCK_SIZE); | |
160 | } | |
161 | ||
d04e9c51 | 162 | if (protocol_version < 27) { |
195bd906 S |
163 | s2length = csum_length; |
164 | } else if (csum_length == SUM_LENGTH) { | |
165 | s2length = SUM_LENGTH; | |
166 | } else { | |
a255c592 WD |
167 | int32 c; |
168 | uint64 l; | |
da9d12f5 | 169 | int b = BLOCKSUM_BIAS; |
a255c592 WD |
170 | for (l = len; l >>= 1; b += 2) {} |
171 | for (c = blength; c >>= 1 && b; b--) {} | |
172 | /* add a bit, subtract rollsum, round up. */ | |
173 | s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */ | |
195bd906 S |
174 | s2length = MAX(s2length, csum_length); |
175 | s2length = MIN(s2length, SUM_LENGTH); | |
176 | } | |
177 | ||
178 | sum->flength = len; | |
179 | sum->blength = blength; | |
180 | sum->s2length = s2length; | |
181 | sum->count = (len + (blength - 1)) / blength; | |
182 | sum->remainder = (len % blength); | |
183 | ||
184 | if (sum->count && verbose > 2) { | |
a255c592 WD |
185 | rprintf(FINFO, |
186 | "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n", | |
187 | (double)sum->count, (long)sum->remainder, (long)sum->blength, | |
da9d12f5 | 188 | sum->s2length, (double)sum->flength); |
195bd906 S |
189 | } |
190 | } | |
80605142 | 191 | |
bceec82f | 192 | |
80605142 WD |
193 | /* |
194 | * Generate and send a stream of signatures/checksums that describe a buffer | |
e66dfd18 | 195 | * |
80605142 WD |
196 | * Generate approximately one checksum every block_len bytes. |
197 | */ | |
cd6aa5b5 | 198 | static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy) |
2f03f956 | 199 | { |
80605142 | 200 | size_t i; |
6e45e1dd | 201 | struct map_struct *mapbuf; |
80605142 | 202 | struct sum_struct sum; |
2f03f956 AT |
203 | OFF_T offset = 0; |
204 | ||
423dba8e | 205 | sum_sizes_sqroot(&sum, len); |
e66dfd18 | 206 | |
6e45e1dd | 207 | if (len > 0) |
96d910c7 | 208 | mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength); |
6e45e1dd WD |
209 | else |
210 | mapbuf = NULL; | |
211 | ||
fc0257c9 | 212 | write_sum_head(f_out, &sum); |
2f03f956 | 213 | |
80605142 | 214 | for (i = 0; i < sum.count; i++) { |
a255c592 | 215 | int32 n1 = (int32)MIN(len, (OFF_T)sum.blength); |
6e45e1dd | 216 | char *map = map_ptr(mapbuf, offset, n1); |
80605142 WD |
217 | uint32 sum1 = get_checksum1(map, n1); |
218 | char sum2[SUM_LENGTH]; | |
2f03f956 | 219 | |
cd6aa5b5 WD |
220 | if (f_copy >= 0) |
221 | full_write(f_copy, map, n1); | |
222 | ||
80605142 | 223 | get_checksum2(map, n1, sum2); |
2f03f956 | 224 | |
80605142 | 225 | if (verbose > 3) { |
e66dfd18 | 226 | rprintf(FINFO, |
a255c592 WD |
227 | "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n", |
228 | (double)i, (double)offset, (long)n1, | |
0e36d9da | 229 | (unsigned long)sum1); |
80605142 WD |
230 | } |
231 | write_int(f_out, sum1); | |
fc0257c9 | 232 | write_buf(f_out, sum2, sum.s2length); |
2f03f956 AT |
233 | len -= n1; |
234 | offset += n1; | |
235 | } | |
6e45e1dd WD |
236 | |
237 | if (mapbuf) | |
238 | unmap_file(mapbuf); | |
2f03f956 AT |
239 | } |
240 | ||
241 | ||
ef1aa910 | 242 | |
fd322eef | 243 | /* |
420ef2c4 | 244 | * Acts on file number @p i from @p flist, whose name is @p fname. |
ef1aa910 MP |
245 | * |
246 | * First fixes up permissions, then generates checksums for the file. | |
247 | * | |
420ef2c4 MP |
248 | * @note This comment was added later by mbp who was trying to work it |
249 | * out. It might be wrong. | |
fd322eef WD |
250 | */ |
251 | static void recv_generator(char *fname, struct file_struct *file, int i, | |
41cfde6b | 252 | int f_out, int f_out_name) |
2cda2560 | 253 | { |
41cfde6b | 254 | int fd = -1, f_copy = -1; |
89f7eff3 | 255 | STRUCT_STAT st, partial_st; |
41cfde6b | 256 | struct file_struct *back_file = NULL; |
e7d13fe5 | 257 | int statret, stat_errno; |
41cfde6b | 258 | char *fnamecmp, *partialptr, *backupptr = NULL; |
375a4556 | 259 | char fnamecmpbuf[MAXPATHLEN]; |
41cfde6b | 260 | uchar fnamecmp_type; |
f7632fc6 | 261 | |
dfd5ba6a WD |
262 | if (list_only) |
263 | return; | |
2f03f956 AT |
264 | |
265 | if (verbose > 2) | |
ecc81fce | 266 | rprintf(FINFO, "recv_generator(%s,%d)\n", safe_fname(fname), i); |
2f03f956 | 267 | |
97f9dcae WD |
268 | if (server_exclude_list.head |
269 | && check_exclude(&server_exclude_list, fname, | |
3e35c34b WD |
270 | S_ISDIR(file->mode)) < 0) { |
271 | if (verbose) { | |
272 | rprintf(FINFO, "skipping server-excluded file \"%s\"\n", | |
ecc81fce | 273 | safe_fname(fname)); |
3e35c34b | 274 | } |
97f9dcae | 275 | return; |
3e35c34b | 276 | } |
97f9dcae | 277 | |
73f7af0e WD |
278 | if (dry_run > 1) { |
279 | statret = -1; | |
280 | stat_errno = ENOENT; | |
281 | } else { | |
282 | statret = link_stat(fname, &st, | |
283 | keep_dirlinks && S_ISDIR(file->mode)); | |
284 | stat_errno = errno; | |
285 | } | |
63787382 | 286 | |
a7260c40 | 287 | if (only_existing && statret == -1 && stat_errno == ENOENT) { |
1347d512 | 288 | /* we only want to update existing files */ |
ecc81fce WD |
289 | if (verbose > 1) { |
290 | rprintf(FINFO, "not creating new file \"%s\"\n", | |
291 | safe_fname(fname)); | |
292 | } | |
1347d512 AT |
293 | return; |
294 | } | |
295 | ||
d9b4d267 WD |
296 | if (statret == 0 && !preserve_perms |
297 | && S_ISDIR(st.st_mode) == S_ISDIR(file->mode)) { | |
4df9f368 | 298 | /* if the file exists already and we aren't perserving |
2cda2560 WD |
299 | * permissions then act as though the remote end sent |
300 | * us the file permissions we already have */ | |
67e78a82 WD |
301 | file->mode = (file->mode & ~CHMOD_BITS) |
302 | | (st.st_mode & CHMOD_BITS); | |
4df9f368 AT |
303 | } |
304 | ||
2f03f956 | 305 | if (S_ISDIR(file->mode)) { |
2cda2560 WD |
306 | /* The file to be received is a directory, so we need |
307 | * to prepare appropriately. If there is already a | |
308 | * file of that name and it is *not* a directory, then | |
309 | * we need to delete it. If it doesn't exist, then | |
310 | * recursively create it. */ | |
311 | ||
ec8290c8 WD |
312 | if (dry_run) |
313 | return; /* TODO: causes inaccuracies -- fix */ | |
2f03f956 | 314 | if (statret == 0 && !S_ISDIR(st.st_mode)) { |
c7c11a0d | 315 | if (robust_unlink(fname) != 0) { |
d62bcc17 WD |
316 | rsyserr(FERROR, errno, |
317 | "recv_generator: unlink %s to make room for directory", | |
318 | full_fname(fname)); | |
2f03f956 AT |
319 | return; |
320 | } | |
321 | statret = -1; | |
322 | } | |
323 | if (statret != 0 && do_mkdir(fname,file->mode) != 0 && errno != EEXIST) { | |
d62bcc17 WD |
324 | if (!(relative_paths && errno == ENOENT |
325 | && create_directory_path(fname, orig_umask) == 0 | |
326 | && do_mkdir(fname, file->mode) == 0)) { | |
327 | rsyserr(FERROR, errno, | |
328 | "recv_generator: mkdir %s failed", | |
329 | full_fname(fname)); | |
2f03f956 AT |
330 | } |
331 | } | |
716e73d4 WD |
332 | /* f_out is set to -1 when doing final directory-permission |
333 | * and modification-time repair. */ | |
334 | if (set_perms(fname, file, statret ? NULL : &st, 0) | |
335 | && verbose && f_out != -1) | |
ecc81fce | 336 | rprintf(FINFO, "%s/\n", safe_fname(fname)); |
2f03f956 | 337 | return; |
7d1bfaf7 WD |
338 | } else if (max_size && file->length > max_size) { |
339 | if (verbose > 1) | |
340 | rprintf(FINFO, "%s is over max-size\n", fname); | |
341 | return; | |
2f03f956 AT |
342 | } |
343 | ||
344 | if (preserve_links && S_ISLNK(file->mode)) { | |
345 | #if SUPPORT_LINKS | |
346 | char lnk[MAXPATHLEN]; | |
347 | int l; | |
2f03f956 | 348 | |
728d0922 | 349 | if (safe_symlinks && unsafe_symlink(file->u.link, fname)) { |
2f03f956 | 350 | if (verbose) { |
ea42541f | 351 | rprintf(FINFO, "ignoring unsafe symlink %s -> \"%s\"\n", |
728d0922 | 352 | full_fname(fname), file->u.link); |
2f03f956 AT |
353 | } |
354 | return; | |
355 | } | |
356 | if (statret == 0) { | |
357 | l = readlink(fname,lnk,MAXPATHLEN-1); | |
358 | if (l > 0) { | |
359 | lnk[l] = 0; | |
85d4d142 MP |
360 | /* A link already pointing to the |
361 | * right place -- no further action | |
362 | * required. */ | |
728d0922 | 363 | if (strcmp(lnk,file->u.link) == 0) { |
c41b52c4 WD |
364 | set_perms(fname, file, &st, |
365 | PERMS_REPORT); | |
2f03f956 AT |
366 | return; |
367 | } | |
2cda2560 | 368 | } |
85d4d142 MP |
369 | /* Not a symlink, so delete whatever's |
370 | * already there and put a new symlink | |
2cda2560 | 371 | * in place. */ |
4b3977bf | 372 | delete_file(fname); |
2f03f956 | 373 | } |
728d0922 | 374 | if (do_symlink(file->u.link,fname) != 0) { |
d62bcc17 | 375 | rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed", |
ecc81fce | 376 | full_fname(fname), safe_fname(file->u.link)); |
2f03f956 AT |
377 | } else { |
378 | set_perms(fname,file,NULL,0); | |
379 | if (verbose) { | |
ecc81fce WD |
380 | rprintf(FINFO, "%s -> %s\n", safe_fname(fname), |
381 | safe_fname(file->u.link)); | |
2f03f956 AT |
382 | } |
383 | } | |
384 | #endif | |
385 | return; | |
386 | } | |
387 | ||
2f03f956 | 388 | if (am_root && preserve_devices && IS_DEVICE(file->mode)) { |
2cda2560 | 389 | if (statret != 0 || |
2f03f956 | 390 | st.st_mode != file->mode || |
3915fd75 | 391 | st.st_rdev != file->u.rdev) { |
2f03f956 | 392 | delete_file(fname); |
d62bcc17 | 393 | if (verbose > 2) { |
2f03f956 | 394 | rprintf(FINFO,"mknod(%s,0%o,0x%x)\n", |
ecc81fce WD |
395 | safe_fname(fname), |
396 | (int)file->mode, (int)file->u.rdev); | |
d62bcc17 | 397 | } |
728d0922 | 398 | if (do_mknod(fname,file->mode,file->u.rdev) != 0) { |
d62bcc17 WD |
399 | rsyserr(FERROR, errno, "mknod %s failed", |
400 | full_fname(fname)); | |
2f03f956 AT |
401 | } else { |
402 | set_perms(fname,file,NULL,0); | |
ecc81fce WD |
403 | if (verbose) { |
404 | rprintf(FINFO, "%s\n", | |
405 | safe_fname(fname)); | |
406 | } | |
2f03f956 AT |
407 | } |
408 | } else { | |
c41b52c4 | 409 | set_perms(fname, file, &st, PERMS_REPORT); |
2f03f956 AT |
410 | } |
411 | return; | |
412 | } | |
2f03f956 | 413 | |
6dff5992 | 414 | if (preserve_hard_links && hard_link_check(file, HL_CHECK_MASTER)) |
2f03f956 | 415 | return; |
2f03f956 AT |
416 | |
417 | if (!S_ISREG(file->mode)) { | |
ecc81fce WD |
418 | rprintf(FINFO, "skipping non-regular file \"%s\"\n", |
419 | safe_fname(fname)); | |
2f03f956 AT |
420 | return; |
421 | } | |
422 | ||
375a4556 | 423 | fnamecmp = fname; |
41cfde6b | 424 | fnamecmp_type = FNAMECMP_FNAME; |
375a4556 | 425 | |
b7e8628c WD |
426 | if (statret == -1 && basis_dir[0] != NULL) { |
427 | int fallback_match = -1; | |
428 | int match_level = 0; | |
429 | int i = 0; | |
430 | do { | |
431 | pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, | |
432 | basis_dir[i], fname); | |
433 | if (link_stat(fnamecmpbuf, &st, 0) == 0 | |
434 | && S_ISREG(st.st_mode)) { | |
435 | statret = 0; | |
436 | if (link_dest) { | |
437 | if (!match_level) { | |
438 | fallback_match = i; | |
439 | match_level = 1; | |
440 | } else if (match_level == 2 | |
441 | && !unchanged_attrs(file, &st)) | |
442 | continue; | |
443 | if (!unchanged_file(fnamecmpbuf, file, &st)) | |
444 | continue; | |
445 | fallback_match = i; | |
446 | match_level = 2; | |
447 | if (!unchanged_attrs(file, &st)) | |
448 | continue; | |
449 | } | |
450 | match_level = 3; | |
451 | break; | |
452 | } | |
453 | } while (basis_dir[++i] != NULL); | |
454 | if (statret == 0) { | |
455 | if (match_level < 3) { | |
456 | i = fallback_match; | |
457 | pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, | |
458 | basis_dir[i], fname); | |
459 | } | |
59c95e42 | 460 | #if HAVE_LINK |
b7e8628c | 461 | if (link_dest && match_level == 3 && !dry_run) { |
e7d13fe5 WD |
462 | if (do_link(fnamecmpbuf, fname) < 0) { |
463 | if (verbose) { | |
464 | rsyserr(FINFO, errno, | |
465 | "link %s => %s", | |
466 | fnamecmpbuf, | |
467 | safe_fname(fname)); | |
468 | } | |
469 | fnamecmp = fnamecmpbuf; | |
b7e8628c | 470 | fnamecmp_type = FNAMECMP_BASIS_DIR + i; |
e7bc9b64 | 471 | } |
e7d13fe5 | 472 | } else |
59c95e42 | 473 | #endif |
41cfde6b | 474 | { |
e7d13fe5 | 475 | fnamecmp = fnamecmpbuf; |
b7e8628c | 476 | fnamecmp_type = FNAMECMP_BASIS_DIR + i; |
41cfde6b | 477 | } |
e7d13fe5 WD |
478 | } |
479 | } | |
480 | ||
481 | if (statret == 0 && !S_ISREG(st.st_mode)) { | |
482 | if (delete_file(fname) != 0) | |
483 | return; | |
484 | statret = -1; | |
485 | stat_errno = ENOENT; | |
375a4556 DD |
486 | } |
487 | ||
72c19bb3 WD |
488 | if (partial_dir && (partialptr = partial_dir_fname(fname)) |
489 | && link_stat(partialptr, &partial_st, 0) == 0 | |
490 | && S_ISREG(partial_st.st_mode)) { | |
491 | if (statret == -1) | |
492 | goto prepare_to_open; | |
493 | } else | |
494 | partialptr = NULL; | |
89f7eff3 | 495 | |
2f03f956 | 496 | if (statret == -1) { |
6dff5992 WD |
497 | if (preserve_hard_links && hard_link_check(file, HL_SKIP)) |
498 | return; | |
41cfde6b WD |
499 | if (stat_errno == ENOENT) |
500 | goto notify_others; | |
501 | if (verbose > 1) { | |
e7d13fe5 WD |
502 | rsyserr(FERROR, stat_errno, |
503 | "recv_generator: failed to stat %s", | |
d62bcc17 | 504 | full_fname(fname)); |
2f03f956 AT |
505 | } |
506 | return; | |
507 | } | |
508 | ||
41cfde6b | 509 | if (opt_ignore_existing && fnamecmp_type == FNAMECMP_FNAME) { |
3d6feada | 510 | if (verbose > 1) |
ecc81fce | 511 | rprintf(FINFO, "%s exists\n", safe_fname(fname)); |
3d6feada | 512 | return; |
2cda2560 | 513 | } |
3d6feada | 514 | |
41cfde6b | 515 | if (update_only && fnamecmp_type == FNAMECMP_FNAME |
d3a4375f | 516 | && cmp_modtime(st.st_mtime, file->modtime) > 0) { |
2f03f956 | 517 | if (verbose > 1) |
ecc81fce | 518 | rprintf(FINFO, "%s is newer\n", safe_fname(fname)); |
2f03f956 AT |
519 | return; |
520 | } | |
521 | ||
b7e8628c WD |
522 | if ((link_dest || copy_dest) && fnamecmp_type != FNAMECMP_FNAME) |
523 | ; | |
524 | else if (unchanged_file(fnamecmp, file, &st)) { | |
41cfde6b | 525 | if (fnamecmp_type == FNAMECMP_FNAME) |
c41b52c4 | 526 | set_perms(fname, file, &st, PERMS_REPORT); |
2f03f956 AT |
527 | return; |
528 | } | |
529 | ||
89f7eff3 | 530 | prepare_to_open: |
41cfde6b WD |
531 | if (dry_run || whole_file > 0) { |
532 | statret = -1; | |
533 | goto notify_others; | |
2f03f956 | 534 | } |
41cfde6b WD |
535 | if (read_batch) |
536 | goto notify_others; | |
2f03f956 | 537 | |
89f7eff3 WD |
538 | if (partialptr) { |
539 | st = partial_st; | |
540 | fnamecmp = partialptr; | |
41cfde6b | 541 | fnamecmp_type = FNAMECMP_PARTIAL_DIR; |
a7260c40 WD |
542 | } |
543 | ||
2cda2560 | 544 | /* open the file */ |
8c9fd200 | 545 | fd = do_open(fnamecmp, O_RDONLY, 0); |
2f03f956 AT |
546 | |
547 | if (fd == -1) { | |
d62bcc17 WD |
548 | rsyserr(FERROR, errno, "failed to open %s, continuing", |
549 | full_fname(fnamecmp)); | |
cd6aa5b5 | 550 | pretend_missing: |
60be6acf | 551 | /* pretend the file didn't exist */ |
6dff5992 WD |
552 | if (preserve_hard_links && hard_link_check(file, HL_SKIP)) |
553 | return; | |
41cfde6b WD |
554 | statret = -1; |
555 | goto notify_others; | |
2f03f956 AT |
556 | } |
557 | ||
cd6aa5b5 WD |
558 | if (inplace && make_backups) { |
559 | if (!(backupptr = get_backup_name(fname))) { | |
560 | close(fd); | |
561 | return; | |
562 | } | |
563 | if (!(back_file = make_file(fname, NULL, NO_EXCLUDES))) { | |
564 | close(fd); | |
565 | goto pretend_missing; | |
566 | } | |
567 | if (robust_unlink(backupptr) && errno != ENOENT) { | |
568 | rsyserr(FERROR, errno, "unlink %s", | |
569 | full_fname(backupptr)); | |
570 | free(back_file); | |
571 | close(fd); | |
572 | return; | |
573 | } | |
574 | if ((f_copy = do_open(backupptr, | |
575 | O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) { | |
576 | rsyserr(FERROR, errno, "open %s", | |
577 | full_fname(backupptr)); | |
578 | free(back_file); | |
579 | close(fd); | |
580 | return; | |
581 | } | |
41cfde6b | 582 | fnamecmp_type = FNAMECMP_BACKUP; |
cd6aa5b5 WD |
583 | } |
584 | ||
dfd5ba6a | 585 | if (verbose > 3) { |
ecc81fce WD |
586 | rprintf(FINFO, "gen mapped %s of size %.0f\n", |
587 | safe_fname(fnamecmp), (double)st.st_size); | |
dfd5ba6a | 588 | } |
2f03f956 | 589 | |
2f03f956 | 590 | if (verbose > 2) |
80605142 | 591 | rprintf(FINFO, "generating and sending sums for %d\n", i); |
2f03f956 | 592 | |
41cfde6b WD |
593 | notify_others: |
594 | write_int(f_out, i); | |
595 | if (f_out_name >= 0) | |
596 | write_byte(f_out_name, fnamecmp_type); | |
cd6aa5b5 | 597 | |
41cfde6b WD |
598 | if (dry_run || read_batch) |
599 | return; | |
600 | ||
601 | if (statret == 0) { | |
602 | generate_and_send_sums(fd, st.st_size, f_out, f_copy); | |
2f03f956 | 603 | |
41cfde6b WD |
604 | if (f_copy >= 0) { |
605 | close(f_copy); | |
606 | set_perms(backupptr, back_file, NULL, 0); | |
607 | if (verbose > 1) { | |
608 | rprintf(FINFO, "backed up %s to %s\n", | |
609 | fname, backupptr); | |
610 | } | |
611 | free(back_file); | |
612 | } | |
613 | ||
614 | close(fd); | |
615 | } else | |
616 | write_sum_head(f_out, NULL); | |
2f03f956 AT |
617 | } |
618 | ||
619 | ||
41cfde6b WD |
620 | void generate_files(int f_out, struct file_list *flist, char *local_name, |
621 | int f_out_name) | |
2f03f956 AT |
622 | { |
623 | int i; | |
e1f67417 | 624 | int phase = 0; |
968c8030 | 625 | char fbuf[MAXPATHLEN]; |
2f03f956 | 626 | |
45e08edb WD |
627 | if (verbose > 2) { |
628 | rprintf(FINFO, "generator starting pid=%ld count=%d\n", | |
629 | (long)getpid(), flist->count); | |
630 | } | |
2f03f956 | 631 | |
3e7053ac MP |
632 | if (verbose >= 2) { |
633 | rprintf(FINFO, | |
f38bd4a0 | 634 | whole_file > 0 |
3e7053ac MP |
635 | ? "delta-transmission disabled for local transfer or --whole-file\n" |
636 | : "delta transmission enabled\n"); | |
637 | } | |
2cda2560 | 638 | |
a57873b7 AT |
639 | /* we expect to just sit around now, so don't exit on a |
640 | timeout. If we really get a timeout then the other process should | |
641 | exit */ | |
642 | io_timeout = 0; | |
643 | ||
2f03f956 AT |
644 | for (i = 0; i < flist->count; i++) { |
645 | struct file_struct *file = flist->files[i]; | |
dfd5ba6a | 646 | struct file_struct copy; |
2f03f956 | 647 | |
dfd5ba6a WD |
648 | if (!file->basename) |
649 | continue; | |
2f03f956 AT |
650 | /* we need to ensure that any directories we create have writeable |
651 | permissions initially so that we can create the files within | |
652 | them. This is then fixed after the files are transferred */ | |
dfd5ba6a WD |
653 | if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)) { |
654 | copy = *file; | |
2cda2560 WD |
655 | /* XXX: Could this be causing a problem on SCO? Perhaps their |
656 | * handling of permissions is strange? */ | |
dfd5ba6a WD |
657 | copy.mode |= S_IWUSR; /* user write */ |
658 | file = © | |
2f03f956 AT |
659 | } |
660 | ||
3fef5364 | 661 | recv_generator(local_name ? local_name : f_name_to(file, fbuf), |
41cfde6b | 662 | file, i, f_out, f_out_name); |
2f03f956 AT |
663 | } |
664 | ||
665 | phase++; | |
666 | csum_length = SUM_LENGTH; | |
e1f67417 | 667 | ignore_times = 1; |
2f03f956 AT |
668 | |
669 | if (verbose > 2) | |
670 | rprintf(FINFO,"generate_files phase=%d\n",phase); | |
671 | ||
7daccb8e | 672 | write_int(f_out, -1); |
2f03f956 | 673 | |
bc63ae3f S |
674 | /* files can cycle through the system more than once |
675 | * to catch initial checksum errors */ | |
b9b15fb1 | 676 | while ((i = get_redo_num()) != -1) { |
bc63ae3f | 677 | struct file_struct *file = flist->files[i]; |
3fef5364 | 678 | recv_generator(local_name ? local_name : f_name_to(file, fbuf), |
41cfde6b | 679 | file, i, f_out, f_out_name); |
bc63ae3f | 680 | } |
2f03f956 | 681 | |
bc63ae3f S |
682 | phase++; |
683 | if (verbose > 2) | |
684 | rprintf(FINFO,"generate_files phase=%d\n",phase); | |
2f03f956 | 685 | |
7daccb8e | 686 | write_int(f_out, -1); |
6dff5992 WD |
687 | |
688 | if (preserve_hard_links) | |
689 | do_hard_links(); | |
690 | ||
691 | /* now we need to fix any directory permissions that were | |
692 | * modified during the transfer */ | |
693 | for (i = 0; i < flist->count; i++) { | |
694 | struct file_struct *file = flist->files[i]; | |
ec8290c8 WD |
695 | if (!file->basename || !S_ISDIR(file->mode)) |
696 | continue; | |
6dff5992 | 697 | recv_generator(local_name ? local_name : f_name(file), |
41cfde6b | 698 | file, i, -1, -1); |
6dff5992 WD |
699 | } |
700 | ||
701 | if (verbose > 2) | |
702 | rprintf(FINFO,"generate_files finished\n"); | |
2f03f956 | 703 | } |