Commit | Line | Data |
---|---|---|
7a2fd68b | 1 | /* |
0f78b815 WD |
2 | * Routines common to more than one of the rsync processes. |
3 | * | |
4 | * Copyright (C) 1996 Andrew Tridgell | |
5 | * Copyright (C) 1996 Paul Mackerras | |
ba2133d6 | 6 | * Copyright (C) 2003-2007 Wayne Davison |
0f78b815 WD |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
ba2133d6 WD |
9 | * it under the terms of the GNU General Public License version 2 as |
10 | * published by the Free Software Foundation. | |
0f78b815 WD |
11 | * |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
e7c67065 WD |
17 | * You should have received a copy of the GNU General Public License along |
18 | * with this program; if not, write to the Free Software Foundation, Inc., | |
19 | * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. | |
0f78b815 | 20 | */ |
c627d613 | 21 | |
2f03f956 | 22 | #include "rsync.h" |
c8563142 | 23 | #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H |
ceccbacc WD |
24 | #include <iconv.h> |
25 | #endif | |
26 | #if defined HAVE_LIBCHARSET_H && defined HAVE_LOCALE_CHARSET | |
27 | #include <libcharset.h> | |
28 | #elif defined HAVE_LANGINFO_H && defined HAVE_NL_LANGINFO | |
29 | #include <langinfo.h> | |
30 | #endif | |
43a481dc | 31 | |
c627d613 | 32 | extern int verbose; |
c627d613 | 33 | extern int dry_run; |
1c3344a1 | 34 | extern int preserve_acls; |
9b499e95 | 35 | extern int preserve_perms; |
81284832 | 36 | extern int preserve_executability; |
2f03f956 | 37 | extern int preserve_times; |
82471e68 | 38 | extern int omit_dir_times; |
7b8356d0 | 39 | extern int am_root; |
794b0a03 | 40 | extern int am_server; |
c3e5e585 WD |
41 | extern int am_sender; |
42 | extern int am_generator; | |
ed9d969c | 43 | extern int am_starting_up; |
e0f4a661 | 44 | extern int allow_8bit_chars; |
b675ba6f | 45 | extern int protocol_version; |
2f03f956 AT |
46 | extern int preserve_uid; |
47 | extern int preserve_gid; | |
3ea6e0e7 | 48 | extern int inc_recurse; |
c786a7ae | 49 | extern int inplace; |
f3d6d480 | 50 | extern int flist_eof; |
81b07870 | 51 | extern int keep_dirlinks; |
2f03f956 | 52 | extern int make_backups; |
f3d6d480 | 53 | extern struct file_list *cur_flist, *first_flist, *dir_flist; |
94d3725c | 54 | extern struct chmod_mode_struct *daemon_chmod_modes; |
fe055c71 | 55 | |
595251de | 56 | #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H |
ceccbacc WD |
57 | iconv_t ic_chck = (iconv_t)-1; |
58 | ||
2a62f5ee | 59 | static const char *default_charset(void) |
ceccbacc WD |
60 | { |
61 | #if defined HAVE_LIBCHARSET_H && defined HAVE_LOCALE_CHARSET | |
62 | return locale_charset(); | |
63 | #elif defined HAVE_LANGINFO_H && defined HAVE_NL_LANGINFO | |
7fc87d2d | 64 | return nl_langinfo(CODESET); |
ceccbacc WD |
65 | #else |
66 | return ""; /* Works with (at the very least) gnu iconv... */ | |
67 | #endif | |
68 | } | |
69 | ||
70 | void setup_iconv() | |
71 | { | |
e0f4a661 WD |
72 | if (!am_server && !allow_8bit_chars) { |
73 | const char *defset = default_charset(); | |
2d2f71fb | 74 | |
e0f4a661 WD |
75 | /* It's OK if this fails... */ |
76 | ic_chck = iconv_open(defset, defset); | |
ceccbacc | 77 | |
e0f4a661 WD |
78 | if (verbose > 3) { |
79 | if (ic_chck == (iconv_t)-1) { | |
80 | rprintf(FINFO, | |
81 | "note: iconv_open(\"%s\", \"%s\") failed (%d)" | |
82 | " -- using isprint() instead of iconv().\n", | |
83 | defset, defset, errno); | |
84 | } else { | |
85 | rprintf(FINFO, | |
86 | "note: iconv_open(\"%s\", \"%s\") succeeded.\n", | |
87 | defset, defset); | |
88 | } | |
7fc87d2d | 89 | } |
ceccbacc WD |
90 | } |
91 | } | |
92 | #endif | |
fe055c71 | 93 | |
d1c178dd WD |
94 | /* This is used by sender.c with a valid f_out, and by receive.c with |
95 | * f_out = -1. */ | |
f3d6d480 WD |
96 | int read_ndx_and_attrs(int f_in, int f_out, int *iflag_ptr, |
97 | uchar *type_ptr, char *buf, int *len_ptr) | |
d1c178dd | 98 | { |
f3d6d480 WD |
99 | int len, iflags = 0; |
100 | struct file_list *flist; | |
d1c178dd | 101 | uchar fnamecmp_type = FNAMECMP_FNAME; |
f3d6d480 WD |
102 | int verbose_save, ndx; |
103 | ||
104 | read_loop: | |
105 | while (1) { | |
9ae7a2cd | 106 | ndx = read_ndx(f_in); |
f3d6d480 WD |
107 | |
108 | if (ndx >= 0) | |
109 | break; | |
110 | if (ndx == NDX_DONE) | |
111 | return ndx; | |
3ea6e0e7 | 112 | if (!inc_recurse || am_sender) |
f3d6d480 WD |
113 | goto invalid_ndx; |
114 | if (ndx == NDX_FLIST_EOF) { | |
115 | flist_eof = 1; | |
116 | send_msg(MSG_FLIST_EOF, "", 0); | |
117 | continue; | |
118 | } | |
119 | ndx = NDX_FLIST_OFFSET - ndx; | |
120 | if (ndx < 0 || ndx >= dir_flist->count) { | |
121 | ndx = NDX_FLIST_OFFSET - ndx; | |
122 | rprintf(FERROR, | |
123 | "Invalid dir index: %d (%d - %d)\n", | |
124 | ndx, NDX_FLIST_OFFSET, | |
125 | NDX_FLIST_OFFSET - dir_flist->count); | |
126 | exit_cleanup(RERR_PROTOCOL); | |
127 | } | |
128 | verbose_save = verbose; | |
129 | verbose = 0; /* TODO allow verbose messages? */ | |
130 | ||
131 | /* Send everything read from f_in to msg_fd_out. */ | |
132 | send_msg_int(MSG_FLIST, ndx); | |
133 | start_flist_forward(f_in); | |
134 | flist = recv_file_list(f_in); | |
135 | flist->parent_ndx = ndx; | |
136 | stop_flist_forward(); | |
137 | ||
138 | verbose = verbose_save; | |
139 | } | |
140 | ||
141 | iflags = protocol_version >= 29 ? read_shortint(f_in) | |
d1c178dd WD |
142 | : ITEM_TRANSFER | ITEM_MISSING_DATA; |
143 | ||
f3d6d480 WD |
144 | /* Honor the old-style keep-alive indicator. */ |
145 | if (protocol_version < 30 | |
146 | && ndx == cur_flist->count && iflags == ITEM_IS_NEW) { | |
147 | if (am_sender) | |
148 | maybe_send_keepalive(); | |
149 | goto read_loop; | |
150 | } | |
151 | ||
152 | if (!(flist = flist_for_ndx(ndx))) { | |
153 | invalid_ndx: | |
154 | rprintf(FERROR, | |
155 | "Invalid file index: %d (%d - %d) with iflags %x [%s]\n", | |
156 | ndx, first_flist->ndx_start + first_flist->ndx_start, | |
157 | first_flist->prev->ndx_start + first_flist->ndx_start | |
158 | + first_flist->prev->count - 1, iflags, who_am_i()); | |
d1c178dd WD |
159 | exit_cleanup(RERR_PROTOCOL); |
160 | } | |
f3d6d480 | 161 | cur_flist = flist; |
d1c178dd WD |
162 | |
163 | if (iflags & ITEM_BASIS_TYPE_FOLLOWS) | |
164 | fnamecmp_type = read_byte(f_in); | |
165 | *type_ptr = fnamecmp_type; | |
166 | ||
167 | if (iflags & ITEM_XNAME_FOLLOWS) { | |
168 | if ((len = read_vstring(f_in, buf, MAXPATHLEN)) < 0) | |
169 | exit_cleanup(RERR_PROTOCOL); | |
170 | } else { | |
171 | *buf = '\0'; | |
172 | len = -1; | |
173 | } | |
174 | *len_ptr = len; | |
175 | ||
176 | if (iflags & ITEM_TRANSFER) { | |
f3d6d480 WD |
177 | int i = ndx - cur_flist->ndx_start; |
178 | if (!S_ISREG(cur_flist->files[i]->mode)) { | |
d1c178dd WD |
179 | rprintf(FERROR, |
180 | "received request to transfer non-regular file: %d [%s]\n", | |
181 | ndx, who_am_i()); | |
182 | exit_cleanup(RERR_PROTOCOL); | |
183 | } | |
184 | } else if (f_out >= 0) { | |
3831f063 WD |
185 | if (inc_recurse) |
186 | send_extra_file_list(f_out, FILECNT_LOOKAHEAD); | |
d1c178dd WD |
187 | write_ndx_and_attrs(f_out, ndx, iflags, |
188 | fnamecmp_type, buf, len); | |
189 | } | |
190 | ||
f3d6d480 WD |
191 | *iflag_ptr = iflags; |
192 | return ndx; | |
d1c178dd WD |
193 | } |
194 | ||
c627d613 AT |
195 | /* |
196 | free a sums struct | |
197 | */ | |
2f03f956 | 198 | void free_sums(struct sum_struct *s) |
c627d613 | 199 | { |
298c10d5 AT |
200 | if (s->sums) free(s->sums); |
201 | free(s); | |
c627d613 AT |
202 | } |
203 | ||
81284832 WD |
204 | /* This is only called when we aren't preserving permissions. Figure out what |
205 | * the permissions should be and return them merged back into the mode. */ | |
1c3344a1 WD |
206 | mode_t dest_mode(mode_t flist_mode, mode_t stat_mode, int dflt_perms, |
207 | int exists) | |
81284832 | 208 | { |
67f8a41b | 209 | int new_mode; |
9b499e95 | 210 | /* If the file already exists, we'll return the local permissions, |
81284832 WD |
211 | * possibly tweaked by the --executability option. */ |
212 | if (exists) { | |
67f8a41b | 213 | new_mode = (flist_mode & ~CHMOD_BITS) | (stat_mode & CHMOD_BITS); |
81284832 WD |
214 | if (preserve_executability && S_ISREG(flist_mode)) { |
215 | /* If the source file is executable, grant execute | |
216 | * rights to everyone who can read, but ONLY if the | |
217 | * file isn't already executable. */ | |
218 | if (!(flist_mode & 0111)) | |
67f8a41b WD |
219 | new_mode &= ~0111; |
220 | else if (!(stat_mode & 0111)) | |
221 | new_mode |= (new_mode & 0444) >> 2; | |
81284832 | 222 | } |
67f8a41b | 223 | } else { |
1c3344a1 WD |
224 | /* Apply destination default permissions and turn |
225 | * off special permissions. */ | |
226 | new_mode = flist_mode & (~CHMOD_BITS | dflt_perms); | |
67f8a41b | 227 | } |
67f8a41b | 228 | return new_mode; |
81284832 WD |
229 | } |
230 | ||
1c3344a1 | 231 | int set_file_attrs(char *fname, struct file_struct *file, statx *sxp, |
36119f6e | 232 | int flags) |
c627d613 | 233 | { |
667e72a1 | 234 | int updated = 0; |
1c3344a1 | 235 | statx sx2; |
460f6b99 | 236 | int change_uid, change_gid; |
519d55a9 | 237 | mode_t new_mode = file->mode; |
c627d613 | 238 | |
1c3344a1 | 239 | if (!sxp) { |
f227ffe4 WD |
240 | if (dry_run) |
241 | return 1; | |
1c3344a1 | 242 | if (link_stat(fname, &sx2.st, 0) < 0) { |
d62bcc17 WD |
243 | rsyserr(FERROR, errno, "stat %s failed", |
244 | full_fname(fname)); | |
667e72a1 AT |
245 | return 0; |
246 | } | |
1c3344a1 WD |
247 | #ifdef SUPPORT_ACLS |
248 | sx2.acc_acl = sx2.def_acl = NULL; | |
249 | #endif | |
519d55a9 | 250 | if (!preserve_perms && S_ISDIR(new_mode) |
1c3344a1 | 251 | && sx2.st.st_mode & S_ISGID) { |
9b499e95 WD |
252 | /* We just created this directory and its setgid |
253 | * bit is on, so make sure it stays on. */ | |
519d55a9 | 254 | new_mode |= S_ISGID; |
9b499e95 | 255 | } |
1c3344a1 | 256 | sxp = &sx2; |
667e72a1 | 257 | } |
c627d613 | 258 | |
1c3344a1 WD |
259 | #ifdef SUPPORT_ACLS |
260 | if (preserve_acls && !S_ISLNK(file->mode) && !ACL_READY(*sxp)) | |
261 | get_acl(fname, sxp); | |
262 | #endif | |
263 | ||
264 | if (!preserve_times || (S_ISDIR(sxp->st.st_mode) && omit_dir_times)) | |
36119f6e WD |
265 | flags |= ATTRS_SKIP_MTIME; |
266 | if (!(flags & ATTRS_SKIP_MTIME) | |
1c3344a1 WD |
267 | && cmp_time(sxp->st.st_mtime, file->modtime) != 0) { |
268 | int ret = set_modtime(fname, file->modtime, sxp->st.st_mode); | |
c8d34657 | 269 | if (ret < 0) { |
d62bcc17 WD |
270 | rsyserr(FERROR, errno, "failed to set times on %s", |
271 | full_fname(fname)); | |
1c3344a1 | 272 | goto cleanup; |
667e72a1 | 273 | } |
c8d34657 WD |
274 | if (ret == 0) /* ret == 1 if symlink could not be set */ |
275 | updated = 1; | |
667e72a1 AT |
276 | } |
277 | ||
1c3344a1 | 278 | change_uid = am_root && preserve_uid && sxp->st.st_uid != F_UID(file); |
82ad07c4 | 279 | change_gid = preserve_gid && F_GID(file) != GID_NONE |
1c3344a1 | 280 | && sxp->st.st_gid != F_GID(file); |
4f5b0756 | 281 | #if !defined HAVE_LCHOWN && !defined CHOWN_MODIFIES_SYMLINK |
1c3344a1 | 282 | if (S_ISLNK(sxp->st.st_mode)) |
a41a1e87 WD |
283 | ; |
284 | else | |
285 | #endif | |
460f6b99 | 286 | if (change_uid || change_gid) { |
62c9e6b3 | 287 | if (verbose > 2) { |
ce37eb2d WD |
288 | if (change_uid) { |
289 | rprintf(FINFO, | |
4875d6b6 | 290 | "set uid of %s from %ld to %ld\n", |
45c49b52 | 291 | fname, |
1c3344a1 | 292 | (long)sxp->st.st_uid, (long)F_UID(file)); |
ce37eb2d WD |
293 | } |
294 | if (change_gid) { | |
295 | rprintf(FINFO, | |
4875d6b6 | 296 | "set gid of %s from %ld to %ld\n", |
45c49b52 | 297 | fname, |
1c3344a1 | 298 | (long)sxp->st.st_gid, (long)F_GID(file)); |
ce37eb2d WD |
299 | } |
300 | } | |
667e72a1 | 301 | if (do_lchown(fname, |
1c3344a1 WD |
302 | change_uid ? F_UID(file) : sxp->st.st_uid, |
303 | change_gid ? F_GID(file) : sxp->st.st_gid) != 0) { | |
460f6b99 | 304 | /* shouldn't have attempted to change uid or gid |
a174e1ed | 305 | * unless have the privilege */ |
d62bcc17 | 306 | rsyserr(FERROR, errno, "%s %s failed", |
a174e1ed | 307 | change_uid ? "chown" : "chgrp", |
d62bcc17 | 308 | full_fname(fname)); |
1c3344a1 | 309 | goto cleanup; |
667e72a1 | 310 | } |
a5827a28 | 311 | /* a lchown had been done - we have to re-stat if the |
dd096ae0 WD |
312 | * destination had the setuid or setgid bits set due |
313 | * to the side effect of the chown call */ | |
1c3344a1 WD |
314 | if (sxp->st.st_mode & (S_ISUID | S_ISGID)) { |
315 | link_stat(fname, &sxp->st, | |
316 | keep_dirlinks && S_ISDIR(sxp->st.st_mode)); | |
a5827a28 | 317 | } |
460f6b99 | 318 | updated = 1; |
667e72a1 | 319 | } |
c627d613 | 320 | |
519d55a9 WD |
321 | if (daemon_chmod_modes && !S_ISLNK(new_mode)) |
322 | new_mode = tweak_mode(new_mode, daemon_chmod_modes); | |
1c3344a1 WD |
323 | |
324 | #ifdef SUPPORT_ACLS | |
325 | /* It's OK to call set_acl() now, even for a dir, as the generator | |
326 | * will enable owner-writability using chmod, if necessary. | |
327 | * | |
328 | * If set_acl() changes permission bits in the process of setting | |
329 | * an access ACL, it changes sxp->st.st_mode so we know whether we | |
330 | * need to chmod(). */ | |
331 | if (preserve_acls && !S_ISLNK(new_mode) && set_acl(fname, file, sxp) == 0) | |
332 | updated = 1; | |
333 | #endif | |
334 | ||
4f5b0756 | 335 | #ifdef HAVE_CHMOD |
1c3344a1 | 336 | if (!BITS_EQUAL(sxp->st.st_mode, new_mode, CHMOD_BITS)) { |
519d55a9 | 337 | int ret = do_chmod(fname, new_mode); |
c8d34657 WD |
338 | if (ret < 0) { |
339 | rsyserr(FERROR, errno, | |
340 | "failed to set permissions on %s", | |
341 | full_fname(fname)); | |
1c3344a1 | 342 | goto cleanup; |
667e72a1 | 343 | } |
c8d34657 WD |
344 | if (ret == 0) /* ret == 1 if symlink could not be set */ |
345 | updated = 1; | |
667e72a1 | 346 | } |
c627d613 | 347 | #endif |
6a7cc46c | 348 | |
36119f6e | 349 | if (verbose > 1 && flags & ATTRS_REPORT) { |
667e72a1 | 350 | if (updated) |
1925c344 | 351 | rprintf(FCLIENT, "%s\n", fname); |
667e72a1 | 352 | else |
1925c344 | 353 | rprintf(FCLIENT, "%s is uptodate\n", fname); |
667e72a1 | 354 | } |
1c3344a1 WD |
355 | cleanup: |
356 | #ifdef SUPPORT_ACLS | |
357 | if (preserve_acls && sxp == &sx2) | |
358 | free_acl(&sx2); | |
359 | #endif | |
667e72a1 | 360 | return updated; |
c627d613 AT |
361 | } |
362 | ||
b8e9c234 | 363 | RETSIGTYPE sig_int(UNUSED(int val)) |
34ccb63e | 364 | { |
d5a0b483 WD |
365 | /* KLUGE: if the user hits Ctrl-C while ssh is prompting |
366 | * for a password, then our cleanup's sending of a SIGUSR1 | |
367 | * signal to all our children may kill ssh before it has a | |
368 | * chance to restore the tty settings (i.e. turn echo back | |
369 | * on). By sleeping for a short time, ssh gets a bigger | |
370 | * chance to do the right thing. If child processes are | |
371 | * not ssh waiting for a password, then this tiny delay | |
372 | * shouldn't hurt anything. */ | |
373 | msleep(400); | |
65417579 | 374 | exit_cleanup(RERR_SIGNAL); |
c627d613 AT |
375 | } |
376 | ||
d8b1c923 WD |
377 | /* Finish off a file transfer: renaming the file and setting the file's |
378 | * attributes (e.g. permissions, ownership, etc.). If partialptr is not | |
379 | * NULL and the robust_rename() call is forced to copy the temp file, we | |
380 | * stage the file into the partial-dir and then rename it into place. */ | |
381 | void finish_transfer(char *fname, char *fnametmp, char *partialptr, | |
382 | struct file_struct *file, int ok_to_set_time, | |
383 | int overwriting_basis) | |
c95da96a | 384 | { |
62c9e6b3 WD |
385 | int ret; |
386 | ||
a3221d2a WD |
387 | if (inplace) { |
388 | if (verbose > 2) | |
45c49b52 | 389 | rprintf(FINFO, "finishing %s\n", fname); |
d8b1c923 | 390 | fnametmp = fname; |
36119f6e | 391 | goto do_set_file_attrs; |
a3221d2a WD |
392 | } |
393 | ||
f3d6d480 | 394 | if (make_backups > 0 && overwriting_basis && !make_backup(fname)) |
e484f0cc WD |
395 | return; |
396 | ||
ebeacb36 | 397 | /* Change permissions before putting the file into place. */ |
36119f6e WD |
398 | set_file_attrs(fnametmp, file, NULL, |
399 | ok_to_set_time ? 0 : ATTRS_SKIP_MTIME); | |
ebeacb36 | 400 | |
c95da96a | 401 | /* move tmp file over real file */ |
45c49b52 WD |
402 | if (verbose > 2) |
403 | rprintf(FINFO, "renaming %s to %s\n", fnametmp, fname); | |
d8b1c923 WD |
404 | ret = robust_rename(fnametmp, fname, partialptr, |
405 | file->mode & INITACCESSPERMS); | |
3d061653 | 406 | if (ret < 0) { |
d62bcc17 | 407 | rsyserr(FERROR, errno, "%s %s -> \"%s\"", |
45c49b52 WD |
408 | ret == -2 ? "copy" : "rename", |
409 | full_fname(fnametmp), fname); | |
c7c11a0d | 410 | do_unlink(fnametmp); |
077e59b7 | 411 | return; |
c95da96a | 412 | } |
ebeacb36 WD |
413 | if (ret == 0) { |
414 | /* The file was moved into place (not copied), so it's done. */ | |
415 | return; | |
416 | } | |
d8b1c923 WD |
417 | /* The file was copied, so tweak the perms of the copied file. If it |
418 | * was copied to partialptr, move it into its final destination. */ | |
419 | fnametmp = partialptr ? partialptr : fname; | |
420 | ||
36119f6e | 421 | do_set_file_attrs: |
d8b1c923 | 422 | set_file_attrs(fnametmp, file, NULL, |
36119f6e | 423 | ok_to_set_time ? 0 : ATTRS_SKIP_MTIME); |
d8b1c923 WD |
424 | |
425 | if (partialptr) { | |
426 | if (do_rename(fnametmp, fname) < 0) { | |
427 | rsyserr(FERROR, errno, "rename %s -> \"%s\"", | |
428 | full_fname(fnametmp), fname); | |
429 | } else | |
430 | handle_partial_dir(partialptr, PDIR_DELETE); | |
431 | } | |
c95da96a | 432 | } |
c3e5e585 | 433 | |
f3d6d480 WD |
434 | struct file_list *flist_for_ndx(int ndx) |
435 | { | |
436 | struct file_list *flist = cur_flist; | |
437 | ||
87a34ce5 | 438 | if (!flist && !(flist = first_flist)) |
f3d6d480 WD |
439 | return NULL; |
440 | ||
441 | while (ndx < flist->ndx_start) { | |
442 | if (flist == first_flist) | |
443 | return NULL; | |
444 | flist = flist->prev; | |
445 | } | |
446 | while (ndx >= flist->ndx_start + flist->count) { | |
447 | if (!(flist = flist->next)) | |
448 | return NULL; | |
449 | } | |
450 | return flist; | |
451 | } | |
452 | ||
c3e5e585 WD |
453 | const char *who_am_i(void) |
454 | { | |
ed9d969c | 455 | if (am_starting_up) |
794b0a03 | 456 | return am_server ? "server" : "client"; |
ebeacb36 | 457 | return am_sender ? "sender" : am_generator ? "generator" : "receiver"; |
c3e5e585 | 458 | } |