1: /*
2: * Routines common to more than one of the rsync processes.
3: *
4: * Copyright (C) 1996 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 "ifuncs.h"
24: #if defined HAVE_LIBCHARSET_H && defined HAVE_LOCALE_CHARSET
25: #include <libcharset.h>
26: #elif defined HAVE_LANGINFO_H && defined HAVE_NL_LANGINFO
27: #include <langinfo.h>
28: #endif
29:
30: extern int dry_run;
31: extern int preserve_acls;
32: extern int preserve_xattrs;
33: extern int preserve_perms;
34: extern int preserve_fileflags;
35: extern int preserve_executability;
36: extern int preserve_times;
37: extern int copy_devices;
38: extern int am_root;
39: extern int am_server;
40: extern int am_daemon;
41: extern int am_sender;
42: extern int am_receiver;
43: extern int am_generator;
44: extern int am_dbadmin;
45: extern int am_starting_up;
46: extern int allow_8bit_chars;
47: extern int protocol_version;
48: extern int got_kill_signal;
49: extern int called_from_signal_handler;
50: extern int inc_recurse;
51: extern int inplace;
52: extern int flist_eof;
53: extern int file_old_total;
54: extern int keep_dirlinks;
55: extern int make_backups;
56: extern char *link_by_hash_dir;
57: extern int sanitize_paths;
58: extern struct file_list *cur_flist, *first_flist, *dir_flist;
59: extern struct chmod_mode_struct *daemon_chmod_modes;
60: #ifdef ICONV_OPTION
61: extern char *iconv_opt;
62: #endif
63:
64: #define UPDATED_OWNER (1<<0)
65: #define UPDATED_GROUP (1<<1)
66: #define UPDATED_MTIME (1<<2)
67: #define UPDATED_ATIME (1<<3)
68: #define UPDATED_ACLS (1<<4)
69: #define UPDATED_MODE (1<<5)
70:
71: #define UPDATED_TIMES (UPDATED_MTIME|UPDATED_ATIME)
72:
73: #ifdef ICONV_CONST
74: iconv_t ic_chck = (iconv_t)-1;
75: # ifdef ICONV_OPTION
76: iconv_t ic_send = (iconv_t)-1, ic_recv = (iconv_t)-1;
77: # endif
78:
79: static const char *default_charset(void)
80: {
81: # if defined HAVE_LIBCHARSET_H && defined HAVE_LOCALE_CHARSET
82: return locale_charset();
83: # elif defined HAVE_LANGINFO_H && defined HAVE_NL_LANGINFO
84: return nl_langinfo(CODESET);
85: # else
86: return ""; /* Works with (at the very least) gnu iconv... */
87: # endif
88: }
89:
90: void setup_iconv(void)
91: {
92: const char *defset = default_charset();
93: # ifdef ICONV_OPTION
94: const char *charset;
95: char *cp;
96: # endif
97:
98: if (!am_server && !allow_8bit_chars) {
99: /* It's OK if this fails... */
100: ic_chck = iconv_open(defset, defset);
101:
102: if (DEBUG_GTE(ICONV, 2)) {
103: if (ic_chck == (iconv_t)-1) {
104: rprintf(FINFO,
105: "msg checking via isprint()"
106: " (iconv_open(\"%s\", \"%s\") errno: %d)\n",
107: defset, defset, errno);
108: } else {
109: rprintf(FINFO,
110: "msg checking charset: %s\n",
111: defset);
112: }
113: }
114: } else
115: ic_chck = (iconv_t)-1;
116:
117: # ifdef ICONV_OPTION
118: if (!iconv_opt)
119: return;
120:
121: if ((cp = strchr(iconv_opt, ',')) != NULL) {
122: if (am_server) /* A local transfer needs this. */
123: iconv_opt = cp + 1;
124: else
125: *cp = '\0';
126: }
127:
128: if (!*iconv_opt || (*iconv_opt == '.' && iconv_opt[1] == '\0'))
129: charset = defset;
130: else
131: charset = iconv_opt;
132:
133: if ((ic_send = iconv_open(UTF8_CHARSET, charset)) == (iconv_t)-1) {
134: rprintf(FERROR, "iconv_open(\"%s\", \"%s\") failed\n",
135: UTF8_CHARSET, charset);
136: exit_cleanup(RERR_UNSUPPORTED);
137: }
138:
139: if ((ic_recv = iconv_open(charset, UTF8_CHARSET)) == (iconv_t)-1) {
140: rprintf(FERROR, "iconv_open(\"%s\", \"%s\") failed\n",
141: charset, UTF8_CHARSET);
142: exit_cleanup(RERR_UNSUPPORTED);
143: }
144:
145: if (DEBUG_GTE(ICONV, 1)) {
146: rprintf(FINFO, "[%s] charset: %s\n",
147: who_am_i(), *charset ? charset : "[LOCALE]");
148: }
149: # endif
150: }
151:
152: /* This function converts the chars in the "in" xbuf into characters in the
153: * "out" xbuf. The ".len" chars of the "in" xbuf is used starting from its
154: * ".pos". The ".size" of the "out" xbuf restricts how many characters can
155: * be stored, starting at its ".pos+.len" position. Note that the last byte
156: * of the "out" xbuf is not used, which reserves space for a trailing '\0'
157: * (though it is up to the caller to store a trailing '\0', as needed).
158: *
159: * We return a 0 on success or a -1 on error. An error also sets errno to
160: * E2BIG, EILSEQ, or EINVAL (see below); otherwise errno will be set to 0.
161: * The "in" xbuf is altered to update ".pos" and ".len". The "out" xbuf has
162: * data appended, and its ".len" incremented (see below for a ".size" note).
163: *
164: * If ICB_CIRCULAR_OUT is set in "flags", the chars going into the "out" xbuf
165: * can wrap around to the start, and the xbuf may have its ".size" reduced
166: * (presumably by 1 byte) if the iconv code doesn't have space to store a
167: * multi-byte character at the physical end of the ".buf" (though no reducing
168: * happens if ".pos" is <= 1, since there is no room to wrap around).
169: *
170: * If ICB_EXPAND_OUT is set in "flags", the "out" xbuf will be allocated if
171: * empty, and (as long as ICB_CIRCULAR_OUT is not set) expanded if too small.
172: * This prevents the return of E2BIG (except for a circular xbuf).
173: *
174: * If ICB_INCLUDE_BAD is set in "flags", any badly-encoded chars are included
175: * verbatim in the "out" xbuf, so EILSEQ will not be returned.
176: *
177: * If ICB_INCLUDE_INCOMPLETE is set in "flags", any incomplete multi-byte
178: * chars are included, which ensures that EINVAL is not returned.
179: *
180: * If ICB_INIT is set, the iconv() conversion state is initialized prior to
181: * processing the characters. */
182: int iconvbufs(iconv_t ic, xbuf *in, xbuf *out, int flags)
183: {
184: ICONV_CONST char *ibuf;
185: size_t icnt, ocnt, opos;
186: char *obuf;
187:
188: if (!out->size && flags & ICB_EXPAND_OUT) {
189: size_t siz = ROUND_UP_1024(in->len * 2);
190: alloc_xbuf(out, siz);
191: } else if (out->len+1 >= out->size) {
192: /* There is no room to even start storing data. */
193: if (!(flags & ICB_EXPAND_OUT) || flags & ICB_CIRCULAR_OUT) {
194: errno = E2BIG;
195: return -1;
196: }
197: realloc_xbuf(out, out->size + ROUND_UP_1024(in->len * 2));
198: }
199:
200: if (flags & ICB_INIT)
201: iconv(ic, NULL, 0, NULL, 0);
202:
203: ibuf = in->buf + in->pos;
204: icnt = in->len;
205:
206: opos = out->pos + out->len;
207: if (flags & ICB_CIRCULAR_OUT) {
208: if (opos >= out->size) {
209: opos -= out->size;
210: /* We know that out->pos is not 0 due to the "no room" check
211: * above, so this can't go "negative". */
212: ocnt = out->pos - opos - 1;
213: } else {
214: /* Allow the use of all bytes to the physical end of the buffer
215: * unless pos is 0, in which case we reserve our trailing '\0'. */
216: ocnt = out->size - opos - (out->pos ? 0 : 1);
217: }
218: } else
219: ocnt = out->size - opos - 1;
220: obuf = out->buf + opos;
221:
222: while (icnt) {
223: while (iconv(ic, &ibuf, &icnt, &obuf, &ocnt) == (size_t)-1) {
224: if (errno == EINTR)
225: continue;
226: if (errno == EINVAL) {
227: if (!(flags & ICB_INCLUDE_INCOMPLETE))
228: goto finish;
229: if (!ocnt)
230: goto e2big;
231: } else if (errno == EILSEQ) {
232: if (!(flags & ICB_INCLUDE_BAD))
233: goto finish;
234: if (!ocnt)
235: goto e2big;
236: } else if (errno == E2BIG) {
237: size_t siz;
238: e2big:
239: opos = obuf - out->buf;
240: if (flags & ICB_CIRCULAR_OUT && out->pos > 1 && opos > out->pos) {
241: /* We are in a divided circular buffer at the physical
242: * end with room to wrap to the start. If iconv() refused
243: * to use one or more trailing bytes in the buffer, we
244: * set the size to ignore the unused bytes. */
245: if (opos < out->size)
246: reduce_iobuf_size(out, opos);
247: obuf = out->buf;
248: ocnt = out->pos - 1;
249: continue;
250: }
251: if (!(flags & ICB_EXPAND_OUT) || flags & ICB_CIRCULAR_OUT) {
252: errno = E2BIG;
253: goto finish;
254: }
255: siz = ROUND_UP_1024(in->len * 2);
256: realloc_xbuf(out, out->size + siz);
257: obuf = out->buf + opos;
258: ocnt += siz;
259: continue;
260: } else {
261: rsyserr(FERROR, errno, "unexpected error from iconv()");
262: exit_cleanup(RERR_UNSUPPORTED);
263: }
264: *obuf++ = *ibuf++;
265: ocnt--, icnt--;
266: if (!icnt)
267: break;
268: }
269: }
270:
271: errno = 0;
272:
273: finish:
274: opos = obuf - out->buf;
275: if (flags & ICB_CIRCULAR_OUT && opos < out->pos)
276: opos += out->size;
277: out->len = opos - out->pos;
278:
279: in->len = icnt;
280: in->pos = ibuf - in->buf;
281:
282: return errno ? -1 : 0;
283: }
284: #endif
285:
286: void send_protected_args(int fd, char *args[])
287: {
288: int i;
289: #ifdef ICONV_OPTION
290: int convert = ic_send != (iconv_t)-1;
291: xbuf outbuf, inbuf;
292:
293: if (convert)
294: alloc_xbuf(&outbuf, 1024);
295: #endif
296:
297: for (i = 0; args[i]; i++) {} /* find first NULL */
298: args[i] = "rsync"; /* set a new arg0 */
299: if (DEBUG_GTE(CMD, 1))
300: print_child_argv("protected args:", args + i + 1);
301: do {
302: if (!args[i][0])
303: write_buf(fd, ".", 2);
304: #ifdef ICONV_OPTION
305: else if (convert) {
306: INIT_XBUF_STRLEN(inbuf, args[i]);
307: iconvbufs(ic_send, &inbuf, &outbuf,
308: ICB_EXPAND_OUT | ICB_INCLUDE_BAD | ICB_INCLUDE_INCOMPLETE | ICB_INIT);
309: outbuf.buf[outbuf.len] = '\0';
310: write_buf(fd, outbuf.buf, outbuf.len + 1);
311: outbuf.len = 0;
312: }
313: #endif
314: else
315: write_buf(fd, args[i], strlen(args[i]) + 1);
316: } while (args[++i]);
317: write_byte(fd, 0);
318:
319: #ifdef ICONV_OPTION
320: if (convert)
321: free(outbuf.buf);
322: #endif
323: }
324:
325: int read_ndx_and_attrs(int f_in, int f_out, int *iflag_ptr, uchar *type_ptr, char *buf, int *len_ptr)
326: {
327: int len, iflags = 0;
328: struct file_list *flist;
329: uchar fnamecmp_type = FNAMECMP_FNAME;
330: int ndx;
331:
332: read_loop:
333: while (1) {
334: ndx = read_ndx(f_in);
335:
336: if (ndx >= 0)
337: break;
338: if (ndx == NDX_DONE)
339: return ndx;
340: if (ndx == NDX_DEL_STATS) {
341: read_del_stats(f_in);
342: if (am_sender && am_server)
343: write_del_stats(f_out);
344: continue;
345: }
346: if (!inc_recurse || am_sender) {
347: int last;
348: if (first_flist)
349: last = first_flist->prev->ndx_start + first_flist->prev->used - 1;
350: else
351: last = -1;
352: rprintf(FERROR,
353: "Invalid file index: %d (%d - %d) [%s]\n",
354: ndx, NDX_DONE, last, who_am_i());
355: exit_cleanup(RERR_PROTOCOL);
356: }
357: if (ndx == NDX_FLIST_EOF) {
358: flist_eof = 1;
359: if (DEBUG_GTE(FLIST, 3))
360: rprintf(FINFO, "[%s] flist_eof=1\n", who_am_i());
361: write_int(f_out, NDX_FLIST_EOF);
362: continue;
363: }
364: ndx = NDX_FLIST_OFFSET - ndx;
365: if (ndx < 0 || ndx >= dir_flist->used) {
366: ndx = NDX_FLIST_OFFSET - ndx;
367: rprintf(FERROR,
368: "Invalid dir index: %d (%d - %d) [%s]\n",
369: ndx, NDX_FLIST_OFFSET,
370: NDX_FLIST_OFFSET - dir_flist->used + 1,
371: who_am_i());
372: exit_cleanup(RERR_PROTOCOL);
373: }
374:
375: if (DEBUG_GTE(FLIST, 2)) {
376: rprintf(FINFO, "[%s] receiving flist for dir %d\n",
377: who_am_i(), ndx);
378: }
379: /* Send all the data we read for this flist to the generator. */
380: start_flist_forward(ndx);
381: flist = recv_file_list(f_in, ndx);
382: flist->parent_ndx = ndx;
383: stop_flist_forward();
384: }
385:
386: iflags = protocol_version >= 29 ? read_shortint(f_in)
387: : ITEM_TRANSFER | ITEM_MISSING_DATA;
388:
389: /* Support the protocol-29 keep-alive style. */
390: if (protocol_version < 30 && ndx == cur_flist->used && iflags == ITEM_IS_NEW) {
391: if (am_sender)
392: maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
393: goto read_loop;
394: }
395:
396: flist = flist_for_ndx(ndx, "read_ndx_and_attrs");
397: if (flist != cur_flist) {
398: cur_flist = flist;
399: if (am_sender) {
400: file_old_total = cur_flist->used;
401: for (flist = first_flist; flist != cur_flist; flist = flist->next)
402: file_old_total += flist->used;
403: }
404: }
405:
406: if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
407: fnamecmp_type = read_byte(f_in);
408: *type_ptr = fnamecmp_type;
409:
410: if (iflags & ITEM_XNAME_FOLLOWS) {
411: if ((len = read_vstring(f_in, buf, MAXPATHLEN)) < 0)
412: exit_cleanup(RERR_PROTOCOL);
413:
414: if (sanitize_paths) {
415: sanitize_path(buf, buf, "", 0, SP_DEFAULT);
416: len = strlen(buf);
417: }
418: } else {
419: *buf = '\0';
420: len = -1;
421: }
422: *len_ptr = len;
423:
424: if (iflags & ITEM_TRANSFER) {
425: int i = ndx - cur_flist->ndx_start;
426: struct file_struct *file = cur_flist->files[i];
427: if (i < 0 || !(S_ISREG(file->mode) || (copy_devices && IS_DEVICE(file->mode)))) {
428: rprintf(FERROR,
429: "received request to transfer non-regular file: %d [%s]\n",
430: ndx, who_am_i());
431: exit_cleanup(RERR_PROTOCOL);
432: }
433: }
434:
435: *iflag_ptr = iflags;
436: return ndx;
437: }
438:
439: /*
440: free a sums struct
441: */
442: void free_sums(struct sum_struct *s)
443: {
444: if (s->sums) free(s->sums);
445: free(s);
446: }
447:
448: /* This is only called when we aren't preserving permissions. Figure out what
449: * the permissions should be and return them merged back into the mode. */
450: mode_t dest_mode(mode_t flist_mode, mode_t stat_mode, int dflt_perms,
451: int exists)
452: {
453: int new_mode;
454: /* If the file already exists, we'll return the local permissions,
455: * possibly tweaked by the --executability option. */
456: if (exists) {
457: new_mode = (flist_mode & ~CHMOD_BITS) | (stat_mode & CHMOD_BITS);
458: if (preserve_executability && S_ISREG(flist_mode)) {
459: /* If the source file is executable, grant execute
460: * rights to everyone who can read, but ONLY if the
461: * file isn't already executable. */
462: if (!(flist_mode & 0111))
463: new_mode &= ~0111;
464: else if (!(stat_mode & 0111))
465: new_mode |= (new_mode & 0444) >> 2;
466: }
467: } else {
468: /* Apply destination default permissions and turn
469: * off special permissions. */
470: new_mode = flist_mode & (~CHMOD_BITS | dflt_perms);
471: }
472: return new_mode;
473: }
474:
475: #if defined SUPPORT_FILEFLAGS || defined SUPPORT_FORCE_CHANGE
476: /* Set a file's st_flags. */
477: static int set_fileflags(const char *fname, uint32 fileflags)
478: {
479: if (do_chflags(fname, fileflags) != 0) {
480: rsyserr(FERROR_XFER, errno,
481: "failed to set file flags on %s",
482: full_fname(fname));
483: return 0;
484: }
485:
486: return 1;
487: }
488:
489: /* Remove immutable flags from an object, so it can be altered/removed. */
490: int make_mutable(const char *fname, mode_t mode, uint32 fileflags, uint32 iflags)
491: {
492: if (S_ISLNK(mode) || !(fileflags & iflags))
493: return 0;
494: if (!set_fileflags(fname, fileflags & ~iflags))
495: return -1;
496: return 1;
497: }
498:
499: /* Undo a prior make_mutable() call that returned a 1. */
500: int undo_make_mutable(const char *fname, uint32 fileflags)
501: {
502: if (!set_fileflags(fname, fileflags))
503: return -1;
504: return 1;
505: }
506: #endif
507:
508: static int same_mtime(struct file_struct *file, STRUCT_STAT *st, int extra_accuracy)
509: {
510: #ifdef ST_MTIME_NSEC
511: uint32 f1_nsec = F_MOD_NSEC_or_0(file);
512: uint32 f2_nsec = (uint32)st->ST_MTIME_NSEC;
513: #else
514: uint32 f1_nsec = 0, f2_nsec = 0;
515: #endif
516:
517: if (extra_accuracy) /* ignore modify_window when setting the time after a transfer or checksum check */
518: return file->modtime == st->st_mtime && f1_nsec == f2_nsec;
519:
520: return same_time(file->modtime, f1_nsec, st->st_mtime , f2_nsec);
521: }
522:
523: int set_file_attrs(const char *fname, struct file_struct *file, stat_x *sxp,
524: const char *fnamecmp, int flags)
525: {
526: int updated = 0;
527: stat_x sx2;
528: int change_uid, change_gid;
529: mode_t new_mode = file->mode;
530: int inherit;
531:
532: if (!sxp) {
533: if (dry_run)
534: return 1;
535: if (link_stat(fname, &sx2.st, 0) < 0) {
536: rsyserr(FERROR_XFER, errno, "stat %s failed",
537: full_fname(fname));
538: return 0;
539: }
540: init_stat_x(&sx2);
541: sxp = &sx2;
542: inherit = !preserve_perms;
543: } else
544: inherit = !preserve_perms && file->flags & FLAG_DIR_CREATED;
545:
546: if (inherit && S_ISDIR(new_mode) && sxp->st.st_mode & S_ISGID) {
547: /* We just created this directory and its setgid
548: * bit is on, so make sure it stays on. */
549: new_mode |= S_ISGID;
550: }
551:
552: if (daemon_chmod_modes && !S_ISLNK(new_mode))
553: new_mode = tweak_mode(new_mode, daemon_chmod_modes);
554:
555: #ifdef SUPPORT_ACLS
556: if (preserve_acls && !S_ISLNK(file->mode) && !ACL_READY(*sxp))
557: get_acl(fname, sxp);
558: #endif
559:
560: change_uid = am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file)
561: && !(omit_dir_changes && S_ISDIR(sxp->st.st_mode));
562: change_gid = gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
563: && sxp->st.st_gid != (gid_t)F_GROUP(file)
564: && !(omit_dir_changes && S_ISDIR(sxp->st.st_mode));
565: #ifndef CAN_CHOWN_SYMLINK
566: if (S_ISLNK(sxp->st.st_mode)) {
567: ;
568: } else
569: #endif
570: if (change_uid || change_gid) {
571: if (DEBUG_GTE(OWN, 1)) {
572: if (change_uid) {
573: rprintf(FINFO,
574: "set uid of %s from %u to %u\n",
575: fname, (unsigned)sxp->st.st_uid, F_OWNER(file));
576: }
577: if (change_gid) {
578: rprintf(FINFO,
579: "set gid of %s from %u to %u\n",
580: fname, (unsigned)sxp->st.st_gid, F_GROUP(file));
581: }
582: }
583: if (am_root >= 0) {
584: uid_t uid = change_uid ? (uid_t)F_OWNER(file) : sxp->st.st_uid;
585: gid_t gid = change_gid ? (gid_t)F_GROUP(file) : sxp->st.st_gid;
586: if (do_lchown(fname, uid, gid, sxp->st.st_mode, ST_FLAGS(sxp->st)) != 0) {
587: /* We shouldn't have attempted to change uid
588: * or gid unless have the privilege. */
589: rsyserr(FERROR_XFER, errno, "%s %s failed",
590: change_uid ? "chown" : "chgrp",
591: full_fname(fname));
592: goto cleanup;
593: }
594: if (uid == (uid_t)-1 && sxp->st.st_uid != (uid_t)-1)
595: rprintf(FERROR_XFER, "uid 4294967295 (-1) is impossible to set on %s\n", full_fname(fname));
596: if (gid == (gid_t)-1 && sxp->st.st_gid != (gid_t)-1)
597: rprintf(FERROR_XFER, "gid 4294967295 (-1) is impossible to set on %s\n", full_fname(fname));
598: /* A lchown had been done, so we need to re-stat if
599: * the destination had the setuid or setgid bits set
600: * (due to the side effect of the chown call). */
601: if (sxp->st.st_mode & (S_ISUID | S_ISGID)) {
602: link_stat(fname, &sxp->st,
603: keep_dirlinks && S_ISDIR(sxp->st.st_mode));
604: }
605: }
606: if (change_uid)
607: updated |= UPDATED_OWNER;
608: if (change_gid)
609: updated |= UPDATED_GROUP;
610: }
611:
612: #ifdef SUPPORT_XATTRS
613: if (am_root < 0)
614: set_stat_xattr(fname, file, new_mode);
615: if (preserve_xattrs && fnamecmp) {
616: uint32 tmpflags = sxp->st.st_flags;
617: sxp->st.st_flags = F_FFLAGS(file); /* set_xattr() needs to check UF_COMPRESSED */
618: set_xattr(fname, file, fnamecmp, sxp);
619: sxp->st.st_flags = tmpflags;
620: if (S_ISDIR(sxp->st.st_mode))
621: link_stat(fname, &sx2.st, 0);
622: }
623: #endif
624:
625: if (!preserve_times
626: || (!(preserve_times & PRESERVE_DIR_TIMES) && S_ISDIR(sxp->st.st_mode))
627: || (!(preserve_times & PRESERVE_LINK_TIMES) && S_ISLNK(sxp->st.st_mode)))
628: flags |= ATTRS_SKIP_MTIME | ATTRS_SKIP_ATIME;
629: else if (sxp != &sx2)
630: memcpy(&sx2.st, &sxp->st, sizeof (sx2.st));
631: if (!atimes_ndx || S_ISDIR(sxp->st.st_mode))
632: flags |= ATTRS_SKIP_ATIME;
633: /* Don't set the creation date on the root folder of an HFS+ volume. */
634: if (sxp->st.st_ino == 2 && S_ISDIR(sxp->st.st_mode))
635: flags |= ATTRS_SKIP_CRTIME;
636: if (!(flags & ATTRS_SKIP_MTIME)
637: #ifdef SUPPORT_HFS_COMPRESSION
638: && !(sxp->st.st_flags & UF_COMPRESSED) /* setting this alters mtime, so defer to after set_fileflags */
639: #endif
640: && !same_mtime(file, &sxp->st, flags & ATTRS_ACCURATE_TIME)) {
641: sx2.st.st_mtime = file->modtime;
642: #ifdef ST_MTIME_NSEC
643: sx2.st.ST_MTIME_NSEC = F_MOD_NSEC_or_0(file);
644: #endif
645: updated |= UPDATED_MTIME;
646: }
647: if (!(flags & ATTRS_SKIP_ATIME)) {
648: time_t file_atime = F_ATIME(file);
649: if (flags & ATTRS_ACCURATE_TIME || !same_time(sxp->st.st_atime, 0, file_atime, 0)) {
650: sx2.st.st_atime = file_atime;
651: #ifdef ST_ATIME_NSEC
652: sx2.st.ST_ATIME_NSEC = 0;
653: #endif
654: updated |= UPDATED_ATIME;
655: }
656: }
657: if (updated & UPDATED_TIMES) {
658: int ret = set_times(fname, &sx2.st);
659: if (ret < 0) {
660: rsyserr(FERROR_XFER, errno, "failed to set times on %s",
661: full_fname(fname));
662: goto cleanup;
663: }
664: if (ret > 0) { /* ret == 1 if symlink could not be set */
665: updated &= ~UPDATED_TIMES;
666: file->flags |= FLAG_TIME_FAILED;
667: }
668: }
669: #ifdef SUPPORT_CRTIMES
670: if (crtimes_ndx && !(flags & ATTRS_SKIP_CRTIME)) {
671: time_t file_crtime = F_CRTIME(file);
672: if (sxp->crtime == 0)
673: sxp->crtime = get_create_time(fname);
674: if (!same_time(sxp->crtime, 0L, file_crtime, 0L)
675: && set_create_time(fname, file_crtime) == 0)
676: updated = 1;
677: }
678: #endif
679:
680: #ifdef SUPPORT_ACLS
681: /* It's OK to call set_acl() now, even for a dir, as the generator
682: * will enable owner-writability using chmod, if necessary.
683: *
684: * If set_acl() changes permission bits in the process of setting
685: * an access ACL, it changes sxp->st.st_mode so we know whether we
686: * need to chmod(). */
687: if (preserve_acls && !S_ISLNK(new_mode)) {
688: if (set_acl(fname, file, sxp, new_mode) > 0)
689: updated |= UPDATED_ACLS;
690: }
691: #endif
692:
693: #ifdef HAVE_CHMOD
694: if (!BITS_EQUAL(sxp->st.st_mode, new_mode, CHMOD_BITS)) {
695: int ret = am_root < 0 ? 0 : do_chmod(fname, new_mode, ST_FLAGS(sxp->st));
696: if (ret < 0) {
697: rsyserr(FERROR_XFER, errno,
698: "failed to set permissions on %s",
699: full_fname(fname));
700: goto cleanup;
701: }
702: if (ret == 0) /* ret == 1 if symlink could not be set */
703: updated |= UPDATED_MODE;
704: }
705: #endif
706:
707: #ifdef SUPPORT_FILEFLAGS
708: if (preserve_fileflags && !S_ISLNK(sxp->st.st_mode)
709: && sxp->st.st_flags != F_FFLAGS(file)) {
710: uint32 fileflags = F_FFLAGS(file);
711: if (flags & ATTRS_DELAY_IMMUTABLE)
712: fileflags &= ~ALL_IMMUTABLE;
713: if (sxp->st.st_flags != fileflags
714: && !set_fileflags(fname, fileflags))
715: goto cleanup;
716: updated = 1;
717: #ifdef SUPPORT_HFS_COMPRESSION
718: int ret = set_modtime(fname, file->modtime, F_MOD_NSEC(file), new_mode, fileflags);
719: if (ret < 0) {
720: rsyserr(FERROR_XFER, errno, "failed to set times on %s",
721: full_fname(fname));
722: goto cleanup;
723: }
724: if (ret != 0)
725: file->flags |= FLAG_TIME_FAILED;
726: #endif
727: }
728: #endif
729:
730: if (INFO_GTE(NAME, 2) && flags & ATTRS_REPORT) {
731: if (updated)
732: rprintf(FCLIENT, "%s\n", fname);
733: else
734: rprintf(FCLIENT, "%s is uptodate\n", fname);
735: }
736: cleanup:
737: if (sxp == &sx2)
738: free_stat_x(&sx2);
739: return updated;
740: }
741:
742: /* This is only called for SIGINT, SIGHUP, and SIGTERM. */
743: void sig_int(int sig_num)
744: {
745: called_from_signal_handler = 1;
746:
747: /* KLUGE: if the user hits Ctrl-C while ssh is prompting
748: * for a password, then our cleanup's sending of a SIGUSR1
749: * signal to all our children may kill ssh before it has a
750: * chance to restore the tty settings (i.e. turn echo back
751: * on). By sleeping for a short time, ssh gets a bigger
752: * chance to do the right thing. If child processes are
753: * not ssh waiting for a password, then this tiny delay
754: * shouldn't hurt anything. */
755: msleep(400);
756:
757: /* If we're an rsync daemon listener (not a daemon server),
758: * we'll exit with status 0 if we received SIGTERM. */
759: if (am_daemon && !am_server && sig_num == SIGTERM)
760: exit_cleanup(0);
761:
762: /* If the signal arrived on the server side (or for the receiver
763: * process on the client), we want to try to do a controlled shutdown
764: * that lets the client side (generator process) know what happened.
765: * To do this, we set a flag and let the normal process handle the
766: * shutdown. We only attempt this if multiplexed IO is in effect and
767: * we didn't already set the flag. */
768: if (!got_kill_signal && (am_server || am_receiver)) {
769: got_kill_signal = sig_num;
770: called_from_signal_handler = 0;
771: return;
772: }
773:
774: exit_cleanup(RERR_SIGNAL);
775: }
776:
777: /* Finish off a file transfer: renaming the file and setting the file's
778: * attributes (e.g. permissions, ownership, etc.). If the robust_rename()
779: * call is forced to copy the temp file and partialptr is both non-NULL and
780: * not an absolute path, we stage the file into the partial-dir and then
781: * rename it into place. This returns 1 on success or 0 on failure. */
782: int finish_transfer(const char *fname, const char *fnametmp,
783: const char *fnamecmp, const char *partialptr,
784: struct file_struct *file, int ok_to_set_time,
785: int overwriting_basis)
786: {
787: int ret;
788: const char *temp_copy_name = partialptr && *partialptr != '/' ? partialptr : NULL;
789:
790: if (inplace) {
791: if (DEBUG_GTE(RECV, 1))
792: rprintf(FINFO, "finishing %s\n", fname);
793: fnametmp = fname;
794: goto do_set_file_attrs;
795: }
796:
797: if (make_backups > 1 && overwriting_basis) {
798: int ok = make_backup(fname, False);
799: if (!ok)
800: exit_cleanup(RERR_FILEIO);
801: if (ok == 1 && fnamecmp == fname)
802: fnamecmp = get_backup_name(fname);
803: }
804:
805: /* Change permissions before putting the file into place. */
806: set_file_attrs(fnametmp, file, NULL, fnamecmp,
807: ATTRS_DELAY_IMMUTABLE
808: | (ok_to_set_time ? ATTRS_ACCURATE_TIME : ATTRS_SKIP_MTIME | ATTRS_SKIP_ATIME | ATTRS_SKIP_CRTIME));
809:
810: /* move tmp file over real file */
811: if (DEBUG_GTE(RECV, 1))
812: rprintf(FINFO, "renaming %s to %s\n", fnametmp, fname);
813: ret = robust_rename(fnametmp, fname, temp_copy_name, file->mode);
814: if (ret < 0) {
815: rsyserr(FERROR_XFER, errno, "%s %s -> \"%s\"",
816: ret == -2 ? "copy" : "rename",
817: full_fname(fnametmp), fname);
818: if (!partialptr || (ret == -2 && temp_copy_name)
819: || robust_rename(fnametmp, partialptr, NULL, file->mode) < 0)
820: do_unlink(fnametmp);
821: return 0;
822: }
823: if (ret == 0) {
824: /* The file was moved into place (not copied), so it's done. */
825: #ifdef SUPPORT_FILEFLAGS
826: if (preserve_fileflags && F_FFLAGS(file) & ALL_IMMUTABLE)
827: set_fileflags(fname, F_FFLAGS(file));
828: #endif
829: return 1;
830: }
831: /* The file was copied, so tweak the perms of the copied file. If it
832: * was copied to partialptr, move it into its final destination. */
833: fnametmp = temp_copy_name ? temp_copy_name : fname;
834:
835: do_set_file_attrs:
836: set_file_attrs(fnametmp, file, NULL, fnamecmp,
837: ok_to_set_time ? ATTRS_ACCURATE_TIME : ATTRS_SKIP_MTIME | ATTRS_SKIP_ATIME | ATTRS_SKIP_CRTIME);
838:
839: if (temp_copy_name) {
840: if (do_rename(fnametmp, fname) < 0) {
841: rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\"",
842: full_fname(fnametmp), fname);
843: return 0;
844: }
845: handle_partial_dir(temp_copy_name, PDIR_DELETE);
846: }
847: return 1;
848: }
849:
850: struct file_list *flist_for_ndx(int ndx, const char *fatal_error_loc)
851: {
852: struct file_list *flist = cur_flist;
853:
854: if (!flist && !(flist = first_flist))
855: goto not_found;
856:
857: while (ndx < flist->ndx_start-1) {
858: if (flist == first_flist)
859: goto not_found;
860: flist = flist->prev;
861: }
862: while (ndx >= flist->ndx_start + flist->used) {
863: if (!(flist = flist->next))
864: goto not_found;
865: }
866: return flist;
867:
868: not_found:
869: if (fatal_error_loc) {
870: int first, last;
871: if (first_flist) {
872: first = first_flist->ndx_start - 1;
873: last = first_flist->prev->ndx_start + first_flist->prev->used - 1;
874: } else {
875: first = 0;
876: last = -1;
877: }
878: rprintf(FERROR,
879: "File-list index %d not in %d - %d (%s) [%s]\n",
880: ndx, first, last, fatal_error_loc, who_am_i());
881: exit_cleanup(RERR_PROTOCOL);
882: }
883: return NULL;
884: }
885:
886: const char *who_am_i(void)
887: {
888: if (am_dbadmin)
889: return "rsyncdb";
890: if (am_starting_up)
891: return am_server ? "server" : "client";
892: return am_sender ? "sender"
893: : am_generator ? "generator"
894: : am_receiver ? "receiver"
895: : "Receiver"; /* pre-forked receiver */
896: }
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