Commit | Line | Data |
---|---|---|
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 | 49 | extern char *basis_dir[]; |
2be2fb3e | 50 | extern int compare_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 | ||
ec8290c8 | 103 | /* |
195bd906 | 104 | * set (initialize) the size entries in the per-file sum_struct |
ec8290c8 | 105 | * calculating dynamic block and checksum sizes. |
195bd906 | 106 | * |
ec8290c8 | 107 | * This is only called from generate_and_send_sums() but is a separate |
195bd906 S |
108 | * function to encapsulate the logic. |
109 | * | |
110 | * The block size is a rounded square root of file length. | |
111 | * | |
112 | * The checksum size is determined according to: | |
113 | * blocksum_bits = BLOCKSUM_EXP + 2*log2(file_len) - log2(block_len) | |
114 | * provided by Donovan Baarda which gives a probability of rsync | |
115 | * algorithm corrupting data and falling back using the whole md4 | |
116 | * checksums. | |
117 | * | |
118 | * This might be made one of several selectable heuristics. | |
119 | */ | |
1490812a | 120 | static void sum_sizes_sqroot(struct sum_struct *sum, int64 len) |
195bd906 | 121 | { |
a255c592 | 122 | int32 blength; |
da9d12f5 | 123 | int s2length; |
195bd906 | 124 | |
a255c592 | 125 | if (block_size) |
195bd906 | 126 | blength = block_size; |
a255c592 | 127 | else if (len <= BLOCK_SIZE * BLOCK_SIZE) |
195bd906 | 128 | blength = BLOCK_SIZE; |
a255c592 WD |
129 | else { |
130 | int32 c; | |
1490812a | 131 | int64 l; |
eae7165c WD |
132 | int cnt; |
133 | for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {} | |
134 | if (cnt >= 31 || c >= MAX_BLOCK_SIZE) | |
135 | blength = MAX_BLOCK_SIZE; | |
136 | else { | |
137 | blength = 0; | |
138 | do { | |
139 | blength |= c; | |
1490812a | 140 | if (len < (int64)blength * blength) |
eae7165c WD |
141 | blength &= ~c; |
142 | c >>= 1; | |
143 | } while (c >= 8); /* round to multiple of 8 */ | |
144 | blength = MAX(blength, BLOCK_SIZE); | |
195bd906 | 145 | } |
195bd906 S |
146 | } |
147 | ||
d04e9c51 | 148 | if (protocol_version < 27) { |
195bd906 S |
149 | s2length = csum_length; |
150 | } else if (csum_length == SUM_LENGTH) { | |
151 | s2length = SUM_LENGTH; | |
152 | } else { | |
a255c592 | 153 | int32 c; |
1490812a | 154 | int64 l; |
da9d12f5 | 155 | int b = BLOCKSUM_BIAS; |
a255c592 WD |
156 | for (l = len; l >>= 1; b += 2) {} |
157 | for (c = blength; c >>= 1 && b; b--) {} | |
158 | /* add a bit, subtract rollsum, round up. */ | |
159 | s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */ | |
195bd906 S |
160 | s2length = MAX(s2length, csum_length); |
161 | s2length = MIN(s2length, SUM_LENGTH); | |
162 | } | |
163 | ||
164 | sum->flength = len; | |
165 | sum->blength = blength; | |
166 | sum->s2length = s2length; | |
167 | sum->count = (len + (blength - 1)) / blength; | |
168 | sum->remainder = (len % blength); | |
169 | ||
170 | if (sum->count && verbose > 2) { | |
a255c592 WD |
171 | rprintf(FINFO, |
172 | "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n", | |
173 | (double)sum->count, (long)sum->remainder, (long)sum->blength, | |
da9d12f5 | 174 | sum->s2length, (double)sum->flength); |
195bd906 S |
175 | } |
176 | } | |
80605142 | 177 | |
bceec82f | 178 | |
80605142 WD |
179 | /* |
180 | * Generate and send a stream of signatures/checksums that describe a buffer | |
e66dfd18 | 181 | * |
80605142 WD |
182 | * Generate approximately one checksum every block_len bytes. |
183 | */ | |
cd6aa5b5 | 184 | static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy) |
2f03f956 | 185 | { |
80605142 | 186 | size_t i; |
6e45e1dd | 187 | struct map_struct *mapbuf; |
80605142 | 188 | struct sum_struct sum; |
2f03f956 AT |
189 | OFF_T offset = 0; |
190 | ||
423dba8e | 191 | sum_sizes_sqroot(&sum, len); |
e66dfd18 | 192 | |
6e45e1dd | 193 | if (len > 0) |
96d910c7 | 194 | mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength); |
6e45e1dd WD |
195 | else |
196 | mapbuf = NULL; | |
197 | ||
fc0257c9 | 198 | write_sum_head(f_out, &sum); |
2f03f956 | 199 | |
80605142 | 200 | for (i = 0; i < sum.count; i++) { |
a255c592 | 201 | int32 n1 = (int32)MIN(len, (OFF_T)sum.blength); |
6e45e1dd | 202 | char *map = map_ptr(mapbuf, offset, n1); |
80605142 WD |
203 | uint32 sum1 = get_checksum1(map, n1); |
204 | char sum2[SUM_LENGTH]; | |
2f03f956 | 205 | |
cd6aa5b5 WD |
206 | if (f_copy >= 0) |
207 | full_write(f_copy, map, n1); | |
208 | ||
80605142 | 209 | get_checksum2(map, n1, sum2); |
2f03f956 | 210 | |
80605142 | 211 | if (verbose > 3) { |
e66dfd18 | 212 | rprintf(FINFO, |
a255c592 WD |
213 | "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n", |
214 | (double)i, (double)offset, (long)n1, | |
0e36d9da | 215 | (unsigned long)sum1); |
80605142 WD |
216 | } |
217 | write_int(f_out, sum1); | |
fc0257c9 | 218 | write_buf(f_out, sum2, sum.s2length); |
2f03f956 AT |
219 | len -= n1; |
220 | offset += n1; | |
221 | } | |
6e45e1dd WD |
222 | |
223 | if (mapbuf) | |
224 | unmap_file(mapbuf); | |
2f03f956 AT |
225 | } |
226 | ||
227 | ||
fd322eef | 228 | /* |
420ef2c4 | 229 | * Acts on file number @p i from @p flist, whose name is @p fname. |
ef1aa910 MP |
230 | * |
231 | * First fixes up permissions, then generates checksums for the file. | |
232 | * | |
420ef2c4 MP |
233 | * @note This comment was added later by mbp who was trying to work it |
234 | * out. It might be wrong. | |
fd322eef WD |
235 | */ |
236 | static void recv_generator(char *fname, struct file_struct *file, int i, | |
41cfde6b | 237 | int f_out, int f_out_name) |
2cda2560 | 238 | { |
41cfde6b | 239 | int fd = -1, f_copy = -1; |
89f7eff3 | 240 | STRUCT_STAT st, partial_st; |
41cfde6b | 241 | struct file_struct *back_file = NULL; |
e7d13fe5 | 242 | int statret, stat_errno; |
41cfde6b | 243 | char *fnamecmp, *partialptr, *backupptr = NULL; |
375a4556 | 244 | char fnamecmpbuf[MAXPATHLEN]; |
41cfde6b | 245 | uchar fnamecmp_type; |
f7632fc6 | 246 | |
dfd5ba6a WD |
247 | if (list_only) |
248 | return; | |
2f03f956 AT |
249 | |
250 | if (verbose > 2) | |
ecc81fce | 251 | rprintf(FINFO, "recv_generator(%s,%d)\n", safe_fname(fname), i); |
2f03f956 | 252 | |
97f9dcae WD |
253 | if (server_exclude_list.head |
254 | && check_exclude(&server_exclude_list, fname, | |
3e35c34b WD |
255 | S_ISDIR(file->mode)) < 0) { |
256 | if (verbose) { | |
257 | rprintf(FINFO, "skipping server-excluded file \"%s\"\n", | |
ecc81fce | 258 | safe_fname(fname)); |
3e35c34b | 259 | } |
97f9dcae | 260 | return; |
3e35c34b | 261 | } |
97f9dcae | 262 | |
73f7af0e WD |
263 | if (dry_run > 1) { |
264 | statret = -1; | |
265 | stat_errno = ENOENT; | |
266 | } else { | |
267 | statret = link_stat(fname, &st, | |
268 | keep_dirlinks && S_ISDIR(file->mode)); | |
269 | stat_errno = errno; | |
270 | } | |
63787382 | 271 | |
a7260c40 | 272 | if (only_existing && statret == -1 && stat_errno == ENOENT) { |
1347d512 | 273 | /* we only want to update existing files */ |
ecc81fce WD |
274 | if (verbose > 1) { |
275 | rprintf(FINFO, "not creating new file \"%s\"\n", | |
276 | safe_fname(fname)); | |
277 | } | |
1347d512 AT |
278 | return; |
279 | } | |
280 | ||
d9b4d267 WD |
281 | if (statret == 0 && !preserve_perms |
282 | && S_ISDIR(st.st_mode) == S_ISDIR(file->mode)) { | |
4df9f368 | 283 | /* if the file exists already and we aren't perserving |
2cda2560 WD |
284 | * permissions then act as though the remote end sent |
285 | * us the file permissions we already have */ | |
67e78a82 WD |
286 | file->mode = (file->mode & ~CHMOD_BITS) |
287 | | (st.st_mode & CHMOD_BITS); | |
4df9f368 AT |
288 | } |
289 | ||
2f03f956 | 290 | if (S_ISDIR(file->mode)) { |
2cda2560 WD |
291 | /* The file to be received is a directory, so we need |
292 | * to prepare appropriately. If there is already a | |
293 | * file of that name and it is *not* a directory, then | |
294 | * we need to delete it. If it doesn't exist, then | |
027428eb | 295 | * (perhaps recursively) create it. */ |
2f03f956 | 296 | if (statret == 0 && !S_ISDIR(st.st_mode)) { |
7e38410e | 297 | delete_file(fname, DEL_TERSE); |
2f03f956 AT |
298 | statret = -1; |
299 | } | |
300 | if (statret != 0 && do_mkdir(fname,file->mode) != 0 && errno != EEXIST) { | |
027428eb WD |
301 | if (!relative_paths || errno != ENOENT |
302 | || create_directory_path(fname, orig_umask) < 0 | |
303 | || do_mkdir(fname, file->mode) < 0) { | |
d62bcc17 WD |
304 | rsyserr(FERROR, errno, |
305 | "recv_generator: mkdir %s failed", | |
306 | full_fname(fname)); | |
2f03f956 AT |
307 | } |
308 | } | |
716e73d4 WD |
309 | /* f_out is set to -1 when doing final directory-permission |
310 | * and modification-time repair. */ | |
311 | if (set_perms(fname, file, statret ? NULL : &st, 0) | |
312 | && verbose && f_out != -1) | |
ecc81fce | 313 | rprintf(FINFO, "%s/\n", safe_fname(fname)); |
2f03f956 | 314 | return; |
7d1bfaf7 WD |
315 | } else if (max_size && file->length > max_size) { |
316 | if (verbose > 1) | |
317 | rprintf(FINFO, "%s is over max-size\n", fname); | |
318 | return; | |
2f03f956 AT |
319 | } |
320 | ||
321 | if (preserve_links && S_ISLNK(file->mode)) { | |
322 | #if SUPPORT_LINKS | |
728d0922 | 323 | if (safe_symlinks && unsafe_symlink(file->u.link, fname)) { |
2f03f956 | 324 | if (verbose) { |
ea42541f | 325 | rprintf(FINFO, "ignoring unsafe symlink %s -> \"%s\"\n", |
728d0922 | 326 | full_fname(fname), file->u.link); |
2f03f956 AT |
327 | } |
328 | return; | |
329 | } | |
330 | if (statret == 0) { | |
7e38410e WD |
331 | int dflag = S_ISDIR(st.st_mode) ? DEL_DIR : 0; |
332 | char lnk[MAXPATHLEN]; | |
333 | int len; | |
334 | ||
335 | if (!dflag | |
336 | && (len = readlink(fname, lnk, MAXPATHLEN-1)) > 0) { | |
337 | lnk[len] = 0; | |
85d4d142 MP |
338 | /* A link already pointing to the |
339 | * right place -- no further action | |
340 | * required. */ | |
7e38410e | 341 | if (strcmp(lnk, file->u.link) == 0) { |
c41b52c4 WD |
342 | set_perms(fname, file, &st, |
343 | PERMS_REPORT); | |
2f03f956 AT |
344 | return; |
345 | } | |
2cda2560 | 346 | } |
7e38410e WD |
347 | /* Not the right symlink (or not a symlink), so |
348 | * delete it. */ | |
349 | delete_file(fname, dflag | DEL_TERSE); | |
2f03f956 | 350 | } |
728d0922 | 351 | if (do_symlink(file->u.link,fname) != 0) { |
d62bcc17 | 352 | rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed", |
ecc81fce | 353 | full_fname(fname), safe_fname(file->u.link)); |
2f03f956 AT |
354 | } else { |
355 | set_perms(fname,file,NULL,0); | |
356 | if (verbose) { | |
ecc81fce WD |
357 | rprintf(FINFO, "%s -> %s\n", safe_fname(fname), |
358 | safe_fname(file->u.link)); | |
2f03f956 AT |
359 | } |
360 | } | |
361 | #endif | |
362 | return; | |
363 | } | |
364 | ||
2f03f956 | 365 | if (am_root && preserve_devices && IS_DEVICE(file->mode)) { |
2cda2560 | 366 | if (statret != 0 || |
2f03f956 | 367 | st.st_mode != file->mode || |
3915fd75 | 368 | st.st_rdev != file->u.rdev) { |
7e38410e WD |
369 | int dflag = S_ISDIR(st.st_mode) ? DEL_DIR : 0; |
370 | delete_file(fname, dflag | DEL_TERSE); | |
d62bcc17 | 371 | if (verbose > 2) { |
2f03f956 | 372 | rprintf(FINFO,"mknod(%s,0%o,0x%x)\n", |
ecc81fce WD |
373 | safe_fname(fname), |
374 | (int)file->mode, (int)file->u.rdev); | |
d62bcc17 | 375 | } |
728d0922 | 376 | if (do_mknod(fname,file->mode,file->u.rdev) != 0) { |
d62bcc17 WD |
377 | rsyserr(FERROR, errno, "mknod %s failed", |
378 | full_fname(fname)); | |
2f03f956 AT |
379 | } else { |
380 | set_perms(fname,file,NULL,0); | |
ecc81fce WD |
381 | if (verbose) { |
382 | rprintf(FINFO, "%s\n", | |
383 | safe_fname(fname)); | |
384 | } | |
2f03f956 AT |
385 | } |
386 | } else { | |
c41b52c4 | 387 | set_perms(fname, file, &st, PERMS_REPORT); |
2f03f956 AT |
388 | } |
389 | return; | |
390 | } | |
2f03f956 | 391 | |
6dff5992 | 392 | if (preserve_hard_links && hard_link_check(file, HL_CHECK_MASTER)) |
2f03f956 | 393 | return; |
2f03f956 AT |
394 | |
395 | if (!S_ISREG(file->mode)) { | |
ecc81fce WD |
396 | rprintf(FINFO, "skipping non-regular file \"%s\"\n", |
397 | safe_fname(fname)); | |
2f03f956 AT |
398 | return; |
399 | } | |
400 | ||
375a4556 | 401 | fnamecmp = fname; |
41cfde6b | 402 | fnamecmp_type = FNAMECMP_FNAME; |
375a4556 | 403 | |
b7e8628c WD |
404 | if (statret == -1 && basis_dir[0] != NULL) { |
405 | int fallback_match = -1; | |
406 | int match_level = 0; | |
407 | int i = 0; | |
408 | do { | |
409 | pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, | |
410 | basis_dir[i], fname); | |
411 | if (link_stat(fnamecmpbuf, &st, 0) == 0 | |
412 | && S_ISREG(st.st_mode)) { | |
413 | statret = 0; | |
414 | if (link_dest) { | |
415 | if (!match_level) { | |
416 | fallback_match = i; | |
417 | match_level = 1; | |
418 | } else if (match_level == 2 | |
419 | && !unchanged_attrs(file, &st)) | |
420 | continue; | |
421 | if (!unchanged_file(fnamecmpbuf, file, &st)) | |
422 | continue; | |
423 | fallback_match = i; | |
424 | match_level = 2; | |
425 | if (!unchanged_attrs(file, &st)) | |
426 | continue; | |
427 | } | |
428 | match_level = 3; | |
429 | break; | |
430 | } | |
431 | } while (basis_dir[++i] != NULL); | |
432 | if (statret == 0) { | |
433 | if (match_level < 3) { | |
434 | i = fallback_match; | |
435 | pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, | |
436 | basis_dir[i], fname); | |
437 | } | |
59c95e42 | 438 | #if HAVE_LINK |
b7e8628c | 439 | if (link_dest && match_level == 3 && !dry_run) { |
e7d13fe5 WD |
440 | if (do_link(fnamecmpbuf, fname) < 0) { |
441 | if (verbose) { | |
442 | rsyserr(FINFO, errno, | |
443 | "link %s => %s", | |
444 | fnamecmpbuf, | |
445 | safe_fname(fname)); | |
446 | } | |
447 | fnamecmp = fnamecmpbuf; | |
2be2fb3e | 448 | fnamecmp_type = i; |
e7bc9b64 | 449 | } |
e7d13fe5 | 450 | } else |
59c95e42 | 451 | #endif |
41cfde6b | 452 | { |
e7d13fe5 | 453 | fnamecmp = fnamecmpbuf; |
2be2fb3e | 454 | fnamecmp_type = i; |
41cfde6b | 455 | } |
e7d13fe5 WD |
456 | } |
457 | } | |
458 | ||
459 | if (statret == 0 && !S_ISREG(st.st_mode)) { | |
7e38410e WD |
460 | int dflag = S_ISDIR(st.st_mode) ? DEL_DIR : 0; |
461 | if (delete_file(fname, dflag | DEL_TERSE) != 0) | |
e7d13fe5 WD |
462 | return; |
463 | statret = -1; | |
464 | stat_errno = ENOENT; | |
375a4556 DD |
465 | } |
466 | ||
9d954dca | 467 | if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL |
72c19bb3 WD |
468 | && link_stat(partialptr, &partial_st, 0) == 0 |
469 | && S_ISREG(partial_st.st_mode)) { | |
470 | if (statret == -1) | |
471 | goto prepare_to_open; | |
472 | } else | |
473 | partialptr = NULL; | |
89f7eff3 | 474 | |
2f03f956 | 475 | if (statret == -1) { |
6dff5992 WD |
476 | if (preserve_hard_links && hard_link_check(file, HL_SKIP)) |
477 | return; | |
41cfde6b WD |
478 | if (stat_errno == ENOENT) |
479 | goto notify_others; | |
480 | if (verbose > 1) { | |
e7d13fe5 WD |
481 | rsyserr(FERROR, stat_errno, |
482 | "recv_generator: failed to stat %s", | |
d62bcc17 | 483 | full_fname(fname)); |
2f03f956 AT |
484 | } |
485 | return; | |
486 | } | |
487 | ||
41cfde6b | 488 | if (opt_ignore_existing && fnamecmp_type == FNAMECMP_FNAME) { |
3d6feada | 489 | if (verbose > 1) |
ecc81fce | 490 | rprintf(FINFO, "%s exists\n", safe_fname(fname)); |
3d6feada | 491 | return; |
2cda2560 | 492 | } |
3d6feada | 493 | |
41cfde6b | 494 | if (update_only && fnamecmp_type == FNAMECMP_FNAME |
d3a4375f | 495 | && cmp_modtime(st.st_mtime, file->modtime) > 0) { |
2f03f956 | 496 | if (verbose > 1) |
ecc81fce | 497 | rprintf(FINFO, "%s is newer\n", safe_fname(fname)); |
2f03f956 AT |
498 | return; |
499 | } | |
500 | ||
2be2fb3e | 501 | if (!compare_dest && fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH) |
b7e8628c WD |
502 | ; |
503 | else if (unchanged_file(fnamecmp, file, &st)) { | |
41cfde6b | 504 | if (fnamecmp_type == FNAMECMP_FNAME) |
c41b52c4 | 505 | set_perms(fname, file, &st, PERMS_REPORT); |
2f03f956 AT |
506 | return; |
507 | } | |
508 | ||
89f7eff3 | 509 | prepare_to_open: |
9d954dca WD |
510 | if (partialptr) { |
511 | st = partial_st; | |
512 | fnamecmp = partialptr; | |
513 | fnamecmp_type = FNAMECMP_PARTIAL_DIR; | |
514 | statret = 0; | |
515 | } | |
516 | ||
41cfde6b WD |
517 | if (dry_run || whole_file > 0) { |
518 | statret = -1; | |
519 | goto notify_others; | |
2f03f956 | 520 | } |
41cfde6b WD |
521 | if (read_batch) |
522 | goto notify_others; | |
2f03f956 | 523 | |
2cda2560 | 524 | /* open the file */ |
8c9fd200 | 525 | fd = do_open(fnamecmp, O_RDONLY, 0); |
2f03f956 AT |
526 | |
527 | if (fd == -1) { | |
d62bcc17 WD |
528 | rsyserr(FERROR, errno, "failed to open %s, continuing", |
529 | full_fname(fnamecmp)); | |
cd6aa5b5 | 530 | pretend_missing: |
60be6acf | 531 | /* pretend the file didn't exist */ |
6dff5992 WD |
532 | if (preserve_hard_links && hard_link_check(file, HL_SKIP)) |
533 | return; | |
41cfde6b WD |
534 | statret = -1; |
535 | goto notify_others; | |
2f03f956 AT |
536 | } |
537 | ||
cd6aa5b5 WD |
538 | if (inplace && make_backups) { |
539 | if (!(backupptr = get_backup_name(fname))) { | |
540 | close(fd); | |
541 | return; | |
542 | } | |
543 | if (!(back_file = make_file(fname, NULL, NO_EXCLUDES))) { | |
544 | close(fd); | |
545 | goto pretend_missing; | |
546 | } | |
547 | if (robust_unlink(backupptr) && errno != ENOENT) { | |
548 | rsyserr(FERROR, errno, "unlink %s", | |
549 | full_fname(backupptr)); | |
550 | free(back_file); | |
551 | close(fd); | |
552 | return; | |
553 | } | |
554 | if ((f_copy = do_open(backupptr, | |
555 | O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) { | |
556 | rsyserr(FERROR, errno, "open %s", | |
557 | full_fname(backupptr)); | |
558 | free(back_file); | |
559 | close(fd); | |
560 | return; | |
561 | } | |
41cfde6b | 562 | fnamecmp_type = FNAMECMP_BACKUP; |
cd6aa5b5 WD |
563 | } |
564 | ||
dfd5ba6a | 565 | if (verbose > 3) { |
ecc81fce WD |
566 | rprintf(FINFO, "gen mapped %s of size %.0f\n", |
567 | safe_fname(fnamecmp), (double)st.st_size); | |
dfd5ba6a | 568 | } |
2f03f956 | 569 | |
2f03f956 | 570 | if (verbose > 2) |
80605142 | 571 | rprintf(FINFO, "generating and sending sums for %d\n", i); |
2f03f956 | 572 | |
41cfde6b WD |
573 | notify_others: |
574 | write_int(f_out, i); | |
17b5b32f WD |
575 | if (protocol_version >= 29 && inplace && !read_batch) |
576 | write_byte(f_out, fnamecmp_type); | |
41cfde6b WD |
577 | if (f_out_name >= 0) |
578 | write_byte(f_out_name, fnamecmp_type); | |
cd6aa5b5 | 579 | |
41cfde6b WD |
580 | if (dry_run || read_batch) |
581 | return; | |
582 | ||
583 | if (statret == 0) { | |
584 | generate_and_send_sums(fd, st.st_size, f_out, f_copy); | |
2f03f956 | 585 | |
41cfde6b WD |
586 | if (f_copy >= 0) { |
587 | close(f_copy); | |
588 | set_perms(backupptr, back_file, NULL, 0); | |
589 | if (verbose > 1) { | |
590 | rprintf(FINFO, "backed up %s to %s\n", | |
591 | fname, backupptr); | |
592 | } | |
593 | free(back_file); | |
594 | } | |
595 | ||
596 | close(fd); | |
597 | } else | |
598 | write_sum_head(f_out, NULL); | |
2f03f956 AT |
599 | } |
600 | ||
601 | ||
41cfde6b WD |
602 | void generate_files(int f_out, struct file_list *flist, char *local_name, |
603 | int f_out_name) | |
2f03f956 AT |
604 | { |
605 | int i; | |
e1f67417 | 606 | int phase = 0; |
968c8030 | 607 | char fbuf[MAXPATHLEN]; |
2f03f956 | 608 | |
45e08edb WD |
609 | if (verbose > 2) { |
610 | rprintf(FINFO, "generator starting pid=%ld count=%d\n", | |
611 | (long)getpid(), flist->count); | |
612 | } | |
2f03f956 | 613 | |
3e7053ac MP |
614 | if (verbose >= 2) { |
615 | rprintf(FINFO, | |
f38bd4a0 | 616 | whole_file > 0 |
3e7053ac MP |
617 | ? "delta-transmission disabled for local transfer or --whole-file\n" |
618 | : "delta transmission enabled\n"); | |
619 | } | |
2cda2560 | 620 | |
a57873b7 AT |
621 | /* we expect to just sit around now, so don't exit on a |
622 | timeout. If we really get a timeout then the other process should | |
623 | exit */ | |
624 | io_timeout = 0; | |
625 | ||
2f03f956 AT |
626 | for (i = 0; i < flist->count; i++) { |
627 | struct file_struct *file = flist->files[i]; | |
dfd5ba6a | 628 | struct file_struct copy; |
2f03f956 | 629 | |
dfd5ba6a WD |
630 | if (!file->basename) |
631 | continue; | |
2f03f956 AT |
632 | /* we need to ensure that any directories we create have writeable |
633 | permissions initially so that we can create the files within | |
634 | them. This is then fixed after the files are transferred */ | |
dfd5ba6a WD |
635 | if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)) { |
636 | copy = *file; | |
2cda2560 WD |
637 | /* XXX: Could this be causing a problem on SCO? Perhaps their |
638 | * handling of permissions is strange? */ | |
dfd5ba6a WD |
639 | copy.mode |= S_IWUSR; /* user write */ |
640 | file = © | |
2f03f956 AT |
641 | } |
642 | ||
3fef5364 | 643 | recv_generator(local_name ? local_name : f_name_to(file, fbuf), |
41cfde6b | 644 | file, i, f_out, f_out_name); |
2f03f956 AT |
645 | } |
646 | ||
647 | phase++; | |
648 | csum_length = SUM_LENGTH; | |
e1f67417 | 649 | ignore_times = 1; |
2f03f956 AT |
650 | |
651 | if (verbose > 2) | |
652 | rprintf(FINFO,"generate_files phase=%d\n",phase); | |
653 | ||
7daccb8e | 654 | write_int(f_out, -1); |
2f03f956 | 655 | |
bc63ae3f S |
656 | /* files can cycle through the system more than once |
657 | * to catch initial checksum errors */ | |
b9b15fb1 | 658 | while ((i = get_redo_num()) != -1) { |
bc63ae3f | 659 | struct file_struct *file = flist->files[i]; |
3fef5364 | 660 | recv_generator(local_name ? local_name : f_name_to(file, fbuf), |
41cfde6b | 661 | file, i, f_out, f_out_name); |
bc63ae3f | 662 | } |
2f03f956 | 663 | |
bc63ae3f S |
664 | phase++; |
665 | if (verbose > 2) | |
666 | rprintf(FINFO,"generate_files phase=%d\n",phase); | |
2f03f956 | 667 | |
7daccb8e | 668 | write_int(f_out, -1); |
6dff5992 | 669 | |
b0da4b23 WD |
670 | /* Read post-redo-phase MSG_DONE and any prior messages. */ |
671 | get_redo_num(); | |
672 | ||
6dff5992 WD |
673 | if (preserve_hard_links) |
674 | do_hard_links(); | |
675 | ||
676 | /* now we need to fix any directory permissions that were | |
677 | * modified during the transfer */ | |
678 | for (i = 0; i < flist->count; i++) { | |
679 | struct file_struct *file = flist->files[i]; | |
ec8290c8 WD |
680 | if (!file->basename || !S_ISDIR(file->mode)) |
681 | continue; | |
6dff5992 | 682 | recv_generator(local_name ? local_name : f_name(file), |
41cfde6b | 683 | file, i, -1, -1); |
6dff5992 WD |
684 | } |
685 | ||
686 | if (verbose > 2) | |
687 | rprintf(FINFO,"generate_files finished\n"); | |
2f03f956 | 688 | } |