1: /*
2: * The filter include/exclude routines.
3: *
4: * Copyright (C) 1996-2001 Andrew Tridgell <tridge@samba.org>
5: * Copyright (C) 1996 Paul Mackerras
6: * Copyright (C) 2002 Martin Pool
7: * Copyright (C) 2003-2013 Wayne Davison
8: *
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 3 of the License, or
12: * (at your option) any later version.
13: *
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.
18: *
19: * You should have received a copy of the GNU General Public License along
20: * with this program; if not, visit the http://fsf.org website.
21: */
22:
23: #include "rsync.h"
24:
25: extern int am_server;
26: extern int am_sender;
27: extern int eol_nulls;
28: extern int io_error;
29: extern int local_server;
30: extern int prune_empty_dirs;
31: extern int ignore_perishable;
32: extern int delete_mode;
33: extern int delete_excluded;
34: extern int cvs_exclude;
35: extern int sanitize_paths;
36: extern int protocol_version;
37: extern int module_id;
38:
39: extern char curr_dir[MAXPATHLEN];
40: extern unsigned int curr_dir_len;
41: extern unsigned int module_dirlen;
42:
43: filter_rule_list filter_list = { .debug_type = "" };
44: filter_rule_list cvs_filter_list = { .debug_type = " [global CVS]" };
45: filter_rule_list daemon_filter_list = { .debug_type = " [daemon]" };
46:
47: /* Need room enough for ":MODS " prefix plus some room to grow. */
48: #define MAX_RULE_PREFIX (16)
49:
50: #define SLASH_WILD3_SUFFIX "/***"
51:
52: /* The dirbuf is set by push_local_filters() to the current subdirectory
53: * relative to curr_dir that is being processed. The path always has a
54: * trailing slash appended, and the variable dirbuf_len contains the length
55: * of this path prefix. The path is always absolute. */
56: static char dirbuf[MAXPATHLEN+1];
57: static unsigned int dirbuf_len = 0;
58: static int dirbuf_depth;
59:
60: /* This is True when we're scanning parent dirs for per-dir merge-files. */
61: static BOOL parent_dirscan = False;
62:
63: /* This array contains a list of all the currently active per-dir merge
64: * files. This makes it easier to save the appropriate values when we
65: * "push" down into each subdirectory. */
66: static filter_rule **mergelist_parents;
67: static int mergelist_cnt = 0;
68: static int mergelist_size = 0;
69:
70: /* Each filter_list_struct describes a singly-linked list by keeping track
71: * of both the head and tail pointers. The list is slightly unusual in that
72: * a parent-dir's content can be appended to the end of the local list in a
73: * special way: the last item in the local list has its "next" pointer set
74: * to point to the inherited list, but the local list's tail pointer points
75: * at the end of the local list. Thus, if the local list is empty, the head
76: * will be pointing at the inherited content but the tail will be NULL. To
77: * help you visualize this, here are the possible list arrangements:
78: *
79: * Completely Empty Local Content Only
80: * ================================== ====================================
81: * head -> NULL head -> Local1 -> Local2 -> NULL
82: * tail -> NULL tail -------------^
83: *
84: * Inherited Content Only Both Local and Inherited Content
85: * ================================== ====================================
86: * head -> Parent1 -> Parent2 -> NULL head -> L1 -> L2 -> P1 -> P2 -> NULL
87: * tail -> NULL tail ---------^
88: *
89: * This means that anyone wanting to traverse the whole list to use it just
90: * needs to start at the head and use the "next" pointers until it goes
91: * NULL. To add new local content, we insert the item after the tail item
92: * and update the tail (obviously, if "tail" was NULL, we insert it at the
93: * head). To clear the local list, WE MUST NOT FREE THE INHERITED CONTENT
94: * because it is shared between the current list and our parent list(s).
95: * The easiest way to handle this is to simply truncate the list after the
96: * tail item and then free the local list from the head. When inheriting
97: * the list for a new local dir, we just save off the filter_list_struct
98: * values (so we can pop back to them later) and set the tail to NULL.
99: */
100:
101: static void teardown_mergelist(filter_rule *ex)
102: {
103: if (DEBUG_GTE(FILTER, 2)) {
104: rprintf(FINFO, "[%s] deactivating mergelist #%d%s\n",
105: who_am_i(), mergelist_cnt - 1,
106: ex->u.mergelist->debug_type);
107: }
108:
109: /* We should deactivate mergelists in LIFO order. */
110: assert(mergelist_cnt > 0);
111: assert(ex == mergelist_parents[mergelist_cnt - 1]);
112:
113: /* The parent_dirscan filters should have been freed. */
114: assert(ex->u.mergelist->parent_dirscan_head == NULL);
115:
116: free(ex->u.mergelist->debug_type);
117: free(ex->u.mergelist);
118: mergelist_cnt--;
119: }
120:
121: static void free_filter(filter_rule *ex)
122: {
123: free(ex->pattern);
124: free(ex);
125: }
126:
127: static void free_filters(filter_rule *head)
128: {
129: filter_rule *rev_head = NULL;
130:
131: /* Reverse the list so we deactivate mergelists in the proper LIFO
132: * order. */
133: while (head) {
134: filter_rule *next = head->next;
135: head->next = rev_head;
136: rev_head = head;
137: head = next;
138: }
139:
140: while (rev_head) {
141: filter_rule *prev = rev_head->next;
142: /* Tear down mergelists here, not in free_filter, so that we
143: * affect only real filter lists and not temporarily allocated
144: * filters. */
145: if (rev_head->rflags & FILTRULE_PERDIR_MERGE)
146: teardown_mergelist(rev_head);
147: free_filter(rev_head);
148: rev_head = prev;
149: }
150: }
151:
152: /* Build a filter structure given a filter pattern. The value in "pat"
153: * is not null-terminated. "rule" is either held or freed, so the
154: * caller should not free it. */
155: static void add_rule(filter_rule_list *listp, const char *pat, unsigned int pat_len,
156: filter_rule *rule, int xflags)
157: {
158: const char *cp;
159: unsigned int pre_len, suf_len, slash_cnt = 0;
160:
161: if (DEBUG_GTE(FILTER, 2)) {
162: rprintf(FINFO, "[%s] add_rule(%s%.*s%s)%s\n",
163: who_am_i(), get_rule_prefix(rule, pat, 0, NULL),
164: (int)pat_len, pat,
165: (rule->rflags & FILTRULE_DIRECTORY) ? "/" : "",
166: listp->debug_type);
167: }
168:
169: /* These flags also indicate that we're reading a list that
170: * needs to be filtered now, not post-filtered later. */
171: if (xflags & (XFLG_ANCHORED2ABS|XFLG_ABS_IF_SLASH)
172: && (rule->rflags & FILTRULES_SIDES)
173: == (am_sender ? FILTRULE_RECEIVER_SIDE : FILTRULE_SENDER_SIDE)) {
174: /* This filter applies only to the other side. Drop it. */
175: free_filter(rule);
176: return;
177: }
178:
179: if (pat_len > 1 && pat[pat_len-1] == '/') {
180: pat_len--;
181: rule->rflags |= FILTRULE_DIRECTORY;
182: }
183:
184: for (cp = pat; cp < pat + pat_len; cp++) {
185: if (*cp == '/')
186: slash_cnt++;
187: }
188:
189: if (!(rule->rflags & (FILTRULE_ABS_PATH | FILTRULE_MERGE_FILE))
190: && ((xflags & (XFLG_ANCHORED2ABS|XFLG_ABS_IF_SLASH) && *pat == '/')
191: || (xflags & XFLG_ABS_IF_SLASH && slash_cnt))) {
192: rule->rflags |= FILTRULE_ABS_PATH;
193: if (*pat == '/')
194: pre_len = dirbuf_len - module_dirlen - 1;
195: else
196: pre_len = 0;
197: } else
198: pre_len = 0;
199:
200: /* The daemon wants dir-exclude rules to get an appended "/" + "***". */
201: if (xflags & XFLG_DIR2WILD3
202: && BITS_SETnUNSET(rule->rflags, FILTRULE_DIRECTORY, FILTRULE_INCLUDE)) {
203: rule->rflags &= ~FILTRULE_DIRECTORY;
204: suf_len = sizeof SLASH_WILD3_SUFFIX - 1;
205: } else
206: suf_len = 0;
207:
208: if (!(rule->pattern = new_array(char, pre_len + pat_len + suf_len + 1)))
209: out_of_memory("add_rule");
210: if (pre_len) {
211: memcpy(rule->pattern, dirbuf + module_dirlen, pre_len);
212: for (cp = rule->pattern; cp < rule->pattern + pre_len; cp++) {
213: if (*cp == '/')
214: slash_cnt++;
215: }
216: }
217: strlcpy(rule->pattern + pre_len, pat, pat_len + 1);
218: pat_len += pre_len;
219: if (suf_len) {
220: memcpy(rule->pattern + pat_len, SLASH_WILD3_SUFFIX, suf_len+1);
221: pat_len += suf_len;
222: slash_cnt++;
223: }
224:
225: if (strpbrk(rule->pattern, "*[?")) {
226: rule->rflags |= FILTRULE_WILD;
227: if ((cp = strstr(rule->pattern, "**")) != NULL) {
228: rule->rflags |= FILTRULE_WILD2;
229: /* If the pattern starts with **, note that. */
230: if (cp == rule->pattern)
231: rule->rflags |= FILTRULE_WILD2_PREFIX;
232: /* If the pattern ends with ***, note that. */
233: if (pat_len >= 3
234: && rule->pattern[pat_len-3] == '*'
235: && rule->pattern[pat_len-2] == '*'
236: && rule->pattern[pat_len-1] == '*')
237: rule->rflags |= FILTRULE_WILD3_SUFFIX;
238: }
239: }
240:
241: if (rule->rflags & FILTRULE_PERDIR_MERGE) {
242: filter_rule_list *lp;
243: unsigned int len;
244: int i;
245:
246: if ((cp = strrchr(rule->pattern, '/')) != NULL)
247: cp++;
248: else
249: cp = rule->pattern;
250:
251: /* If the local merge file was already mentioned, don't
252: * add it again. */
253: for (i = 0; i < mergelist_cnt; i++) {
254: filter_rule *ex = mergelist_parents[i];
255: const char *s = strrchr(ex->pattern, '/');
256: if (s)
257: s++;
258: else
259: s = ex->pattern;
260: len = strlen(s);
261: if (len == pat_len - (cp - rule->pattern) && memcmp(s, cp, len) == 0) {
262: free_filter(rule);
263: return;
264: }
265: }
266:
267: if (!(lp = new_array(filter_rule_list, 1)))
268: out_of_memory("add_rule");
269: lp->head = lp->tail = lp->parent_dirscan_head = NULL;
270: if (asprintf(&lp->debug_type, " [per-dir %s]", cp) < 0)
271: out_of_memory("add_rule");
272: rule->u.mergelist = lp;
273:
274: if (mergelist_cnt == mergelist_size) {
275: mergelist_size += 5;
276: mergelist_parents = realloc_array(mergelist_parents,
277: filter_rule *,
278: mergelist_size);
279: if (!mergelist_parents)
280: out_of_memory("add_rule");
281: }
282: if (DEBUG_GTE(FILTER, 2)) {
283: rprintf(FINFO, "[%s] activating mergelist #%d%s\n",
284: who_am_i(), mergelist_cnt, lp->debug_type);
285: }
286: mergelist_parents[mergelist_cnt++] = rule;
287: } else
288: rule->u.slash_cnt = slash_cnt;
289:
290: if (!listp->tail) {
291: rule->next = listp->head;
292: listp->head = listp->tail = rule;
293: } else {
294: rule->next = listp->tail->next;
295: listp->tail->next = rule;
296: listp->tail = rule;
297: }
298: }
299:
300: static void clear_filter_list(filter_rule_list *listp)
301: {
302: if (listp->tail) {
303: /* Truncate any inherited items from the local list. */
304: listp->tail->next = NULL;
305: /* Now free everything that is left. */
306: free_filters(listp->head);
307: }
308:
309: listp->head = listp->tail = NULL;
310: }
311:
312: /* This returns an expanded (absolute) filename for the merge-file name if
313: * the name has any slashes in it OR if the parent_dirscan var is True;
314: * otherwise it returns the original merge_file name. If the len_ptr value
315: * is non-NULL the merge_file name is limited by the referenced length
316: * value and will be updated with the length of the resulting name. We
317: * always return a name that is null terminated, even if the merge_file
318: * name was not. */
319: static char *parse_merge_name(const char *merge_file, unsigned int *len_ptr,
320: unsigned int prefix_skip)
321: {
322: static char buf[MAXPATHLEN];
323: char *fn, tmpbuf[MAXPATHLEN];
324: unsigned int fn_len;
325:
326: if (!parent_dirscan && *merge_file != '/') {
327: /* Return the name unchanged it doesn't have any slashes. */
328: if (len_ptr) {
329: const char *p = merge_file + *len_ptr;
330: while (--p > merge_file && *p != '/') {}
331: if (p == merge_file) {
332: strlcpy(buf, merge_file, *len_ptr + 1);
333: return buf;
334: }
335: } else if (strchr(merge_file, '/') == NULL)
336: return (char *)merge_file;
337: }
338:
339: fn = *merge_file == '/' ? buf : tmpbuf;
340: if (sanitize_paths) {
341: const char *r = prefix_skip ? "/" : NULL;
342: /* null-terminate the name if it isn't already */
343: if (len_ptr && merge_file[*len_ptr]) {
344: char *to = fn == buf ? tmpbuf : buf;
345: strlcpy(to, merge_file, *len_ptr + 1);
346: merge_file = to;
347: }
348: if (!sanitize_path(fn, merge_file, r, dirbuf_depth, SP_DEFAULT)) {
349: rprintf(FERROR, "merge-file name overflows: %s\n",
350: merge_file);
351: return NULL;
352: }
353: fn_len = strlen(fn);
354: } else {
355: strlcpy(fn, merge_file, len_ptr ? *len_ptr + 1 : MAXPATHLEN);
356: fn_len = clean_fname(fn, CFN_COLLAPSE_DOT_DOT_DIRS);
357: }
358:
359: /* If the name isn't in buf yet, it's wasn't absolute. */
360: if (fn != buf) {
361: int d_len = dirbuf_len - prefix_skip;
362: if (d_len + fn_len >= MAXPATHLEN) {
363: rprintf(FERROR, "merge-file name overflows: %s\n", fn);
364: return NULL;
365: }
366: memcpy(buf, dirbuf + prefix_skip, d_len);
367: memcpy(buf + d_len, fn, fn_len + 1);
368: fn_len = clean_fname(buf, CFN_COLLAPSE_DOT_DOT_DIRS);
369: }
370:
371: if (len_ptr)
372: *len_ptr = fn_len;
373: return buf;
374: }
375:
376: /* Sets the dirbuf and dirbuf_len values. */
377: void set_filter_dir(const char *dir, unsigned int dirlen)
378: {
379: unsigned int len;
380: if (*dir != '/') {
381: memcpy(dirbuf, curr_dir, curr_dir_len);
382: dirbuf[curr_dir_len] = '/';
383: len = curr_dir_len + 1;
384: if (len + dirlen >= MAXPATHLEN)
385: dirlen = 0;
386: } else
387: len = 0;
388: memcpy(dirbuf + len, dir, dirlen);
389: dirbuf[dirlen + len] = '\0';
390: dirbuf_len = clean_fname(dirbuf, CFN_COLLAPSE_DOT_DOT_DIRS);
391: if (dirbuf_len > 1 && dirbuf[dirbuf_len-1] == '.'
392: && dirbuf[dirbuf_len-2] == '/')
393: dirbuf_len -= 2;
394: if (dirbuf_len != 1)
395: dirbuf[dirbuf_len++] = '/';
396: dirbuf[dirbuf_len] = '\0';
397: if (sanitize_paths)
398: dirbuf_depth = count_dir_elements(dirbuf + module_dirlen);
399: }
400:
401: /* This routine takes a per-dir merge-file entry and finishes its setup.
402: * If the name has a path portion then we check to see if it refers to a
403: * parent directory of the first transfer dir. If it does, we scan all the
404: * dirs from that point through the parent dir of the transfer dir looking
405: * for the per-dir merge-file in each one. */
406: static BOOL setup_merge_file(int mergelist_num, filter_rule *ex,
407: filter_rule_list *lp)
408: {
409: char buf[MAXPATHLEN];
410: char *x, *y, *pat = ex->pattern;
411: unsigned int len;
412:
413: if (!(x = parse_merge_name(pat, NULL, 0)) || *x != '/')
414: return 0;
415:
416: if (DEBUG_GTE(FILTER, 2)) {
417: rprintf(FINFO, "[%s] performing parent_dirscan for mergelist #%d%s\n",
418: who_am_i(), mergelist_num, lp->debug_type);
419: }
420: y = strrchr(x, '/');
421: *y = '\0';
422: ex->pattern = strdup(y+1);
423: if (!*x)
424: x = "/";
425: if (*x == '/')
426: strlcpy(buf, x, MAXPATHLEN);
427: else
428: pathjoin(buf, MAXPATHLEN, dirbuf, x);
429:
430: len = clean_fname(buf, CFN_COLLAPSE_DOT_DOT_DIRS);
431: if (len != 1 && len < MAXPATHLEN-1) {
432: buf[len++] = '/';
433: buf[len] = '\0';
434: }
435: /* This ensures that the specified dir is a parent of the transfer. */
436: for (x = buf, y = dirbuf; *x && *x == *y; x++, y++) {}
437: if (*x)
438: y += strlen(y); /* nope -- skip the scan */
439:
440: parent_dirscan = True;
441: while (*y) {
442: char save[MAXPATHLEN];
443: strlcpy(save, y, MAXPATHLEN);
444: *y = '\0';
445: dirbuf_len = y - dirbuf;
446: strlcpy(x, ex->pattern, MAXPATHLEN - (x - buf));
447: parse_filter_file(lp, buf, ex, XFLG_ANCHORED2ABS);
448: if (ex->rflags & FILTRULE_NO_INHERIT) {
449: /* Free the undesired rules to clean up any per-dir
450: * mergelists they defined. Otherwise pop_local_filters
451: * may crash trying to restore nonexistent state for
452: * those mergelists. */
453: free_filters(lp->head);
454: lp->head = NULL;
455: }
456: lp->tail = NULL;
457: strlcpy(y, save, MAXPATHLEN);
458: while ((*x++ = *y++) != '/') {}
459: }
460: /* Save current head for freeing when the mergelist becomes inactive. */
461: lp->parent_dirscan_head = lp->head;
462: parent_dirscan = False;
463: if (DEBUG_GTE(FILTER, 2)) {
464: rprintf(FINFO, "[%s] completed parent_dirscan for mergelist #%d%s\n",
465: who_am_i(), mergelist_num, lp->debug_type);
466: }
467: free(pat);
468: return 1;
469: }
470:
471: struct local_filter_state {
472: int mergelist_cnt;
473: filter_rule_list mergelists[1];
474: };
475:
476: /* Each time rsync changes to a new directory it call this function to
477: * handle all the per-dir merge-files. The "dir" value is the current path
478: * relative to curr_dir (which might not be null-terminated). We copy it
479: * into dirbuf so that we can easily append a file name on the end. */
480: void *push_local_filters(const char *dir, unsigned int dirlen)
481: {
482: struct local_filter_state *push;
483: int i;
484:
485: set_filter_dir(dir, dirlen);
486: if (DEBUG_GTE(FILTER, 2)) {
487: rprintf(FINFO, "[%s] pushing local filters for %s\n",
488: who_am_i(), dirbuf);
489: }
490:
491: if (!mergelist_cnt) {
492: /* No old state to save and no new merge files to push. */
493: return NULL;
494: }
495:
496: push = (struct local_filter_state *)new_array(char,
497: sizeof (struct local_filter_state)
498: + (mergelist_cnt-1) * sizeof (filter_rule_list));
499: if (!push)
500: out_of_memory("push_local_filters");
501:
502: push->mergelist_cnt = mergelist_cnt;
503: for (i = 0; i < mergelist_cnt; i++) {
504: memcpy(&push->mergelists[i], mergelist_parents[i]->u.mergelist,
505: sizeof (filter_rule_list));
506: }
507:
508: /* Note: parse_filter_file() might increase mergelist_cnt, so keep
509: * this loop separate from the above loop. */
510: for (i = 0; i < mergelist_cnt; i++) {
511: filter_rule *ex = mergelist_parents[i];
512: filter_rule_list *lp = ex->u.mergelist;
513:
514: if (DEBUG_GTE(FILTER, 2)) {
515: rprintf(FINFO, "[%s] pushing mergelist #%d%s\n",
516: who_am_i(), i, lp->debug_type);
517: }
518:
519: lp->tail = NULL; /* Switch any local rules to inherited. */
520: if (ex->rflags & FILTRULE_NO_INHERIT)
521: lp->head = NULL;
522:
523: if (ex->rflags & FILTRULE_FINISH_SETUP) {
524: ex->rflags &= ~FILTRULE_FINISH_SETUP;
525: if (setup_merge_file(i, ex, lp))
526: set_filter_dir(dir, dirlen);
527: }
528:
529: if (strlcpy(dirbuf + dirbuf_len, ex->pattern,
530: MAXPATHLEN - dirbuf_len) < MAXPATHLEN - dirbuf_len) {
531: parse_filter_file(lp, dirbuf, ex,
532: XFLG_ANCHORED2ABS);
533: } else {
534: io_error |= IOERR_GENERAL;
535: rprintf(FERROR,
536: "cannot add local filter rules in long-named directory: %s\n",
537: full_fname(dirbuf));
538: }
539: dirbuf[dirbuf_len] = '\0';
540: }
541:
542: return (void*)push;
543: }
544:
545: void pop_local_filters(void *mem)
546: {
547: struct local_filter_state *pop = (struct local_filter_state *)mem;
548: int i;
549: int old_mergelist_cnt = pop ? pop->mergelist_cnt : 0;
550:
551: if (DEBUG_GTE(FILTER, 2))
552: rprintf(FINFO, "[%s] popping local filters\n", who_am_i());
553:
554: for (i = mergelist_cnt; i-- > 0; ) {
555: filter_rule *ex = mergelist_parents[i];
556: filter_rule_list *lp = ex->u.mergelist;
557:
558: if (DEBUG_GTE(FILTER, 2)) {
559: rprintf(FINFO, "[%s] popping mergelist #%d%s\n",
560: who_am_i(), i, lp->debug_type);
561: }
562:
563: clear_filter_list(lp);
564:
565: if (i >= old_mergelist_cnt) {
566: /* This mergelist does not exist in the state to be
567: * restored. Free its parent_dirscan list to clean up
568: * any per-dir mergelists defined there so we don't
569: * crash trying to restore nonexistent state for them
570: * below. (Counterpart to setup_merge_file call in
571: * push_local_filters. Must be done here, not in
572: * free_filter, for LIFO order.) */
573: if (DEBUG_GTE(FILTER, 2)) {
574: rprintf(FINFO, "[%s] freeing parent_dirscan filters of mergelist #%d%s\n",
575: who_am_i(), i, ex->u.mergelist->debug_type);
576: }
577: free_filters(lp->parent_dirscan_head);
578: lp->parent_dirscan_head = NULL;
579: }
580: }
581:
582: /* If we cleaned things up properly, the only still-active mergelists
583: * should be those with a state to be restored. */
584: assert(mergelist_cnt == old_mergelist_cnt);
585:
586: if (!pop) {
587: /* No state to restore. */
588: return;
589: }
590:
591: for (i = 0; i < mergelist_cnt; i++) {
592: memcpy(mergelist_parents[i]->u.mergelist, &pop->mergelists[i],
593: sizeof (filter_rule_list));
594: }
595:
596: free(pop);
597: }
598:
599: void change_local_filter_dir(const char *dname, int dlen, int dir_depth)
600: {
601: static int cur_depth = -1;
602: static void *filt_array[MAXPATHLEN/2+1];
603:
604: if (!dname) {
605: for ( ; cur_depth >= 0; cur_depth--) {
606: if (filt_array[cur_depth]) {
607: pop_local_filters(filt_array[cur_depth]);
608: filt_array[cur_depth] = NULL;
609: }
610: }
611: return;
612: }
613:
614: assert(dir_depth < MAXPATHLEN/2+1);
615:
616: for ( ; cur_depth >= dir_depth; cur_depth--) {
617: if (filt_array[cur_depth]) {
618: pop_local_filters(filt_array[cur_depth]);
619: filt_array[cur_depth] = NULL;
620: }
621: }
622:
623: cur_depth = dir_depth;
624: filt_array[cur_depth] = push_local_filters(dname, dlen);
625: }
626:
627: static int rule_matches(const char *fname, filter_rule *ex, int name_is_dir)
628: {
629: int slash_handling, str_cnt = 0, anchored_match = 0;
630: int ret_match = ex->rflags & FILTRULE_NEGATE ? 0 : 1;
631: char *p, *pattern = ex->pattern;
632: const char *strings[16]; /* more than enough */
633: const char *name = fname + (*fname == '/');
634:
635: if (!*name)
636: return 0;
637:
638: if (!ex->u.slash_cnt && !(ex->rflags & FILTRULE_WILD2)) {
639: /* If the pattern does not have any slashes AND it does
640: * not have a "**" (which could match a slash), then we
641: * just match the name portion of the path. */
642: if ((p = strrchr(name,'/')) != NULL)
643: name = p+1;
644: } else if (ex->rflags & FILTRULE_ABS_PATH && *fname != '/'
645: && curr_dir_len > module_dirlen + 1) {
646: /* If we're matching against an absolute-path pattern,
647: * we need to prepend our full path info. */
648: strings[str_cnt++] = curr_dir + module_dirlen + 1;
649: strings[str_cnt++] = "/";
650: } else if (ex->rflags & FILTRULE_WILD2_PREFIX && *fname != '/') {
651: /* Allow "**"+"/" to match at the start of the string. */
652: strings[str_cnt++] = "/";
653: }
654: strings[str_cnt++] = name;
655: if (name_is_dir) {
656: /* Allow a trailing "/"+"***" to match the directory. */
657: if (ex->rflags & FILTRULE_WILD3_SUFFIX)
658: strings[str_cnt++] = "/";
659: } else if (ex->rflags & FILTRULE_DIRECTORY)
660: return !ret_match;
661: strings[str_cnt] = NULL;
662:
663: if (*pattern == '/') {
664: anchored_match = 1;
665: pattern++;
666: }
667:
668: if (!anchored_match && ex->u.slash_cnt
669: && !(ex->rflags & FILTRULE_WILD2)) {
670: /* A non-anchored match with an infix slash and no "**"
671: * needs to match the last slash_cnt+1 name elements. */
672: slash_handling = ex->u.slash_cnt + 1;
673: } else if (!anchored_match && !(ex->rflags & FILTRULE_WILD2_PREFIX)
674: && ex->rflags & FILTRULE_WILD2) {
675: /* A non-anchored match with an infix or trailing "**" (but not
676: * a prefixed "**") needs to try matching after every slash. */
677: slash_handling = -1;
678: } else {
679: /* The pattern matches only at the start of the path or name. */
680: slash_handling = 0;
681: }
682:
683: if (ex->rflags & FILTRULE_WILD) {
684: if (wildmatch_array(pattern, strings, slash_handling))
685: return ret_match;
686: } else if (str_cnt > 1) {
687: if (litmatch_array(pattern, strings, slash_handling))
688: return ret_match;
689: } else if (anchored_match) {
690: if (strcmp(name, pattern) == 0)
691: return ret_match;
692: } else {
693: int l1 = strlen(name);
694: int l2 = strlen(pattern);
695: if (l2 <= l1 &&
696: strcmp(name+(l1-l2),pattern) == 0 &&
697: (l1==l2 || name[l1-(l2+1)] == '/')) {
698: return ret_match;
699: }
700: }
701:
702: return !ret_match;
703: }
704:
705: static void report_filter_result(enum logcode code, char const *name,
706: filter_rule const *ent,
707: int name_is_dir, const char *type)
708: {
709: /* If a trailing slash is present to match only directories,
710: * then it is stripped out by add_rule(). So as a special
711: * case we add it back in here. */
712:
713: if (DEBUG_GTE(FILTER, 1)) {
714: static char *actions[2][2]
715: = { {"show", "hid"}, {"risk", "protect"} };
716: const char *w = who_am_i();
717: rprintf(code, "[%s] %sing %s %s because of pattern %s%s%s\n",
718: w, actions[*w!='s'][!(ent->rflags & FILTRULE_INCLUDE)],
719: name_is_dir ? "directory" : "file", name, ent->pattern,
720: ent->rflags & FILTRULE_DIRECTORY ? "/" : "", type);
721: }
722: }
723:
724: /* Return -1 if file "name" is defined to be excluded by the specified
725: * exclude list, 1 if it is included, and 0 if it was not matched. */
726: int check_filter(filter_rule_list *listp, enum logcode code,
727: const char *name, int name_is_dir)
728: {
729: filter_rule *ent;
730:
731: for (ent = listp->head; ent; ent = ent->next) {
732: if (ignore_perishable && ent->rflags & FILTRULE_PERISHABLE)
733: continue;
734: if (ent->rflags & FILTRULE_PERDIR_MERGE) {
735: int rc = check_filter(ent->u.mergelist, code, name,
736: name_is_dir);
737: if (rc)
738: return rc;
739: continue;
740: }
741: if (ent->rflags & FILTRULE_CVS_IGNORE) {
742: int rc = check_filter(&cvs_filter_list, code, name,
743: name_is_dir);
744: if (rc)
745: return rc;
746: continue;
747: }
748: if (rule_matches(name, ent, name_is_dir)) {
749: report_filter_result(code, name, ent, name_is_dir,
750: listp->debug_type);
751: return ent->rflags & FILTRULE_INCLUDE ? 1 : -1;
752: }
753: }
754:
755: return 0;
756: }
757:
758: #define RULE_STRCMP(s,r) rule_strcmp((s), (r), sizeof (r) - 1)
759:
760: static const uchar *rule_strcmp(const uchar *str, const char *rule, int rule_len)
761: {
762: if (strncmp((char*)str, rule, rule_len) != 0)
763: return NULL;
764: if (isspace(str[rule_len]) || str[rule_len] == '_' || !str[rule_len])
765: return str + rule_len - 1;
766: if (str[rule_len] == ',')
767: return str + rule_len;
768: return NULL;
769: }
770:
771: #define FILTRULES_FROM_CONTAINER (FILTRULE_ABS_PATH | FILTRULE_INCLUDE \
772: | FILTRULE_DIRECTORY | FILTRULE_NEGATE \
773: | FILTRULE_PERISHABLE)
774:
775: /* Gets the next include/exclude rule from *rulestr_ptr and advances
776: * *rulestr_ptr to point beyond it. Stores the pattern's start (within
777: * *rulestr_ptr) and length in *pat_ptr and *pat_len_ptr, and returns a newly
778: * allocated filter_rule containing the rest of the information. Returns
779: * NULL if there are no more rules in the input.
780: *
781: * The template provides defaults for the new rule to inherit, and the
782: * template rflags and the xflags additionally affect parsing. */
783: static filter_rule *parse_rule_tok(const char **rulestr_ptr,
784: const filter_rule *template, int xflags,
785: const char **pat_ptr, unsigned int *pat_len_ptr)
786: {
787: const uchar *s = (const uchar *)*rulestr_ptr;
788: filter_rule *rule;
789: unsigned int len;
790:
791: if (template->rflags & FILTRULE_WORD_SPLIT) {
792: /* Skip over any initial whitespace. */
793: while (isspace(*s))
794: s++;
795: /* Update to point to real start of rule. */
796: *rulestr_ptr = (const char *)s;
797: }
798: if (!*s)
799: return NULL;
800:
801: if (!(rule = new0(filter_rule)))
802: out_of_memory("parse_rule_tok");
803:
804: /* Inherit from the template. Don't inherit FILTRULES_SIDES; we check
805: * that later. */
806: rule->rflags = template->rflags & FILTRULES_FROM_CONTAINER;
807:
808: /* Figure out what kind of a filter rule "s" is pointing at. Note
809: * that if FILTRULE_NO_PREFIXES is set, the rule is either an include
810: * or an exclude based on the inheritance of the FILTRULE_INCLUDE
811: * flag (above). XFLG_OLD_PREFIXES indicates a compatibility mode
812: * for old include/exclude patterns where just "+ " and "- " are
813: * allowed as optional prefixes. */
814: if (template->rflags & FILTRULE_NO_PREFIXES) {
815: if (*s == '!' && template->rflags & FILTRULE_CVS_IGNORE)
816: rule->rflags |= FILTRULE_CLEAR_LIST; /* Tentative! */
817: } else if (xflags & XFLG_OLD_PREFIXES) {
818: if (*s == '-' && s[1] == ' ') {
819: rule->rflags &= ~FILTRULE_INCLUDE;
820: s += 2;
821: } else if (*s == '+' && s[1] == ' ') {
822: rule->rflags |= FILTRULE_INCLUDE;
823: s += 2;
824: } else if (*s == '!')
825: rule->rflags |= FILTRULE_CLEAR_LIST; /* Tentative! */
826: } else {
827: char ch = 0;
828: BOOL prefix_specifies_side = False;
829: switch (*s) {
830: case 'c':
831: if ((s = RULE_STRCMP(s, "clear")) != NULL)
832: ch = '!';
833: break;
834: case 'd':
835: if ((s = RULE_STRCMP(s, "dir-merge")) != NULL)
836: ch = ':';
837: break;
838: case 'e':
839: if ((s = RULE_STRCMP(s, "exclude")) != NULL)
840: ch = '-';
841: break;
842: case 'h':
843: if ((s = RULE_STRCMP(s, "hide")) != NULL)
844: ch = 'H';
845: break;
846: case 'i':
847: if ((s = RULE_STRCMP(s, "include")) != NULL)
848: ch = '+';
849: break;
850: case 'm':
851: if ((s = RULE_STRCMP(s, "merge")) != NULL)
852: ch = '.';
853: break;
854: case 'p':
855: if ((s = RULE_STRCMP(s, "protect")) != NULL)
856: ch = 'P';
857: break;
858: case 'r':
859: if ((s = RULE_STRCMP(s, "risk")) != NULL)
860: ch = 'R';
861: break;
862: case 's':
863: if ((s = RULE_STRCMP(s, "show")) != NULL)
864: ch = 'S';
865: break;
866: default:
867: ch = *s;
868: if (s[1] == ',')
869: s++;
870: break;
871: }
872: switch (ch) {
873: case ':':
874: rule->rflags |= FILTRULE_PERDIR_MERGE
875: | FILTRULE_FINISH_SETUP;
876: /* FALL THROUGH */
877: case '.':
878: rule->rflags |= FILTRULE_MERGE_FILE;
879: break;
880: case '+':
881: rule->rflags |= FILTRULE_INCLUDE;
882: break;
883: case '-':
884: break;
885: case 'S':
886: rule->rflags |= FILTRULE_INCLUDE;
887: /* FALL THROUGH */
888: case 'H':
889: rule->rflags |= FILTRULE_SENDER_SIDE;
890: prefix_specifies_side = True;
891: break;
892: case 'R':
893: rule->rflags |= FILTRULE_INCLUDE;
894: /* FALL THROUGH */
895: case 'P':
896: rule->rflags |= FILTRULE_RECEIVER_SIDE;
897: prefix_specifies_side = True;
898: break;
899: case '!':
900: rule->rflags |= FILTRULE_CLEAR_LIST;
901: break;
902: default:
903: rprintf(FERROR, "Unknown filter rule: `%s'\n", *rulestr_ptr);
904: exit_cleanup(RERR_SYNTAX);
905: }
906: while (ch != '!' && *++s && *s != ' ' && *s != '_') {
907: if (template->rflags & FILTRULE_WORD_SPLIT && isspace(*s)) {
908: s--;
909: break;
910: }
911: switch (*s) {
912: default:
913: invalid:
914: rprintf(FERROR,
915: "invalid modifier '%c' at position %d in filter rule: %s\n",
916: *s, (int)(s - (const uchar *)*rulestr_ptr), *rulestr_ptr);
917: exit_cleanup(RERR_SYNTAX);
918: case '-':
919: if (!BITS_SETnUNSET(rule->rflags, FILTRULE_MERGE_FILE, FILTRULE_NO_PREFIXES))
920: goto invalid;
921: rule->rflags |= FILTRULE_NO_PREFIXES;
922: break;
923: case '+':
924: if (!BITS_SETnUNSET(rule->rflags, FILTRULE_MERGE_FILE, FILTRULE_NO_PREFIXES))
925: goto invalid;
926: rule->rflags |= FILTRULE_NO_PREFIXES
927: | FILTRULE_INCLUDE;
928: break;
929: case '/':
930: rule->rflags |= FILTRULE_ABS_PATH;
931: break;
932: case '!':
933: /* Negation really goes with the pattern, so it
934: * isn't useful as a merge-file default. */
935: if (rule->rflags & FILTRULE_MERGE_FILE)
936: goto invalid;
937: rule->rflags |= FILTRULE_NEGATE;
938: break;
939: case 'C':
940: if (rule->rflags & FILTRULE_NO_PREFIXES || prefix_specifies_side)
941: goto invalid;
942: rule->rflags |= FILTRULE_NO_PREFIXES
943: | FILTRULE_WORD_SPLIT
944: | FILTRULE_NO_INHERIT
945: | FILTRULE_CVS_IGNORE;
946: break;
947: case 'e':
948: if (!(rule->rflags & FILTRULE_MERGE_FILE))
949: goto invalid;
950: rule->rflags |= FILTRULE_EXCLUDE_SELF;
951: break;
952: case 'n':
953: if (!(rule->rflags & FILTRULE_MERGE_FILE))
954: goto invalid;
955: rule->rflags |= FILTRULE_NO_INHERIT;
956: break;
957: case 'p':
958: rule->rflags |= FILTRULE_PERISHABLE;
959: break;
960: case 'r':
961: if (prefix_specifies_side)
962: goto invalid;
963: rule->rflags |= FILTRULE_RECEIVER_SIDE;
964: break;
965: case 's':
966: if (prefix_specifies_side)
967: goto invalid;
968: rule->rflags |= FILTRULE_SENDER_SIDE;
969: break;
970: case 'w':
971: if (!(rule->rflags & FILTRULE_MERGE_FILE))
972: goto invalid;
973: rule->rflags |= FILTRULE_WORD_SPLIT;
974: break;
975: }
976: }
977: if (*s)
978: s++;
979: }
980: if (template->rflags & FILTRULES_SIDES) {
981: if (rule->rflags & FILTRULES_SIDES) {
982: /* The filter and template both specify side(s). This
983: * is dodgy (and won't work correctly if the template is
984: * a one-sided per-dir merge rule), so reject it. */
985: rprintf(FERROR,
986: "specified-side merge file contains specified-side filter: %s\n",
987: *rulestr_ptr);
988: exit_cleanup(RERR_SYNTAX);
989: }
990: rule->rflags |= template->rflags & FILTRULES_SIDES;
991: }
992:
993: if (template->rflags & FILTRULE_WORD_SPLIT) {
994: const uchar *cp = s;
995: /* Token ends at whitespace or the end of the string. */
996: while (!isspace(*cp) && *cp != '\0')
997: cp++;
998: len = cp - s;
999: } else
1000: len = strlen((char*)s);
1001:
1002: if (rule->rflags & FILTRULE_CLEAR_LIST) {
1003: if (!(rule->rflags & FILTRULE_NO_PREFIXES)
1004: && !(xflags & XFLG_OLD_PREFIXES) && len) {
1005: rprintf(FERROR,
1006: "'!' rule has trailing characters: %s\n", *rulestr_ptr);
1007: exit_cleanup(RERR_SYNTAX);
1008: }
1009: if (len > 1)
1010: rule->rflags &= ~FILTRULE_CLEAR_LIST;
1011: } else if (!len && !(rule->rflags & FILTRULE_CVS_IGNORE)) {
1012: rprintf(FERROR, "unexpected end of filter rule: %s\n", *rulestr_ptr);
1013: exit_cleanup(RERR_SYNTAX);
1014: }
1015:
1016: /* --delete-excluded turns an un-modified include/exclude into a sender-side rule. */
1017: if (delete_excluded
1018: && !(rule->rflags & (FILTRULES_SIDES|FILTRULE_MERGE_FILE|FILTRULE_PERDIR_MERGE)))
1019: rule->rflags |= FILTRULE_SENDER_SIDE;
1020:
1021: *pat_ptr = (const char *)s;
1022: *pat_len_ptr = len;
1023: *rulestr_ptr = *pat_ptr + len;
1024: return rule;
1025: }
1026:
1027: static char default_cvsignore[] =
1028: /* These default ignored items come from the CVS manual. */
1029: "RCS SCCS CVS CVS.adm RCSLOG cvslog.* tags TAGS"
1030: " .make.state .nse_depinfo *~ #* .#* ,* _$* *$"
1031: " *.old *.bak *.BAK *.orig *.rej .del-*"
1032: " *.a *.olb *.o *.obj *.so *.exe"
1033: " *.Z *.elc *.ln core"
1034: /* The rest we added to suit ourself. */
1035: " .svn/ .git/ .hg/ .bzr/";
1036:
1037: static void get_cvs_excludes(uint32 rflags)
1038: {
1039: static int initialized = 0;
1040: char *p, fname[MAXPATHLEN];
1041:
1042: if (initialized)
1043: return;
1044: initialized = 1;
1045:
1046: parse_filter_str(&cvs_filter_list, default_cvsignore,
1047: rule_template(rflags | (protocol_version >= 30 ? FILTRULE_PERISHABLE : 0)),
1048: 0);
1049:
1050: p = module_id >= 0 && lp_use_chroot(module_id) ? "/" : getenv("HOME");
1051: if (p && pathjoin(fname, MAXPATHLEN, p, ".cvsignore") < MAXPATHLEN)
1052: parse_filter_file(&cvs_filter_list, fname, rule_template(rflags), 0);
1053:
1054: parse_filter_str(&cvs_filter_list, getenv("CVSIGNORE"), rule_template(rflags), 0);
1055: }
1056:
1057: const filter_rule *rule_template(uint32 rflags)
1058: {
1059: static filter_rule template; /* zero-initialized */
1060: template.rflags = rflags;
1061: return &template;
1062: }
1063:
1064: void parse_filter_str(filter_rule_list *listp, const char *rulestr,
1065: const filter_rule *template, int xflags)
1066: {
1067: filter_rule *rule;
1068: const char *pat;
1069: unsigned int pat_len;
1070:
1071: if (!rulestr)
1072: return;
1073:
1074: while (1) {
1075: uint32 new_rflags;
1076:
1077: /* Remember that the returned string is NOT '\0' terminated! */
1078: if (!(rule = parse_rule_tok(&rulestr, template, xflags, &pat, &pat_len)))
1079: break;
1080:
1081: if (pat_len >= MAXPATHLEN) {
1082: rprintf(FERROR, "discarding over-long filter: %.*s\n",
1083: (int)pat_len, pat);
1084: free_continue:
1085: free_filter(rule);
1086: continue;
1087: }
1088:
1089: new_rflags = rule->rflags;
1090: if (new_rflags & FILTRULE_CLEAR_LIST) {
1091: if (DEBUG_GTE(FILTER, 2)) {
1092: rprintf(FINFO,
1093: "[%s] clearing filter list%s\n",
1094: who_am_i(), listp->debug_type);
1095: }
1096: clear_filter_list(listp);
1097: goto free_continue;
1098: }
1099:
1100: if (new_rflags & FILTRULE_MERGE_FILE) {
1101: if (!pat_len) {
1102: pat = ".cvsignore";
1103: pat_len = 10;
1104: }
1105: if (new_rflags & FILTRULE_EXCLUDE_SELF) {
1106: const char *name;
1107: filter_rule *excl_self;
1108:
1109: if (!(excl_self = new0(filter_rule)))
1110: out_of_memory("parse_filter_str");
1111: /* Find the beginning of the basename and add an exclude for it. */
1112: for (name = pat + pat_len; name > pat && name[-1] != '/'; name--) {}
1113: add_rule(listp, name, (pat + pat_len) - name, excl_self, 0);
1114: rule->rflags &= ~FILTRULE_EXCLUDE_SELF;
1115: }
1116: if (new_rflags & FILTRULE_PERDIR_MERGE) {
1117: if (parent_dirscan) {
1118: const char *p;
1119: unsigned int len = pat_len;
1120: if ((p = parse_merge_name(pat, &len, module_dirlen)))
1121: add_rule(listp, p, len, rule, 0);
1122: else
1123: free_filter(rule);
1124: continue;
1125: }
1126: } else {
1127: const char *p;
1128: unsigned int len = pat_len;
1129: if ((p = parse_merge_name(pat, &len, 0)))
1130: parse_filter_file(listp, p, rule, XFLG_FATAL_ERRORS);
1131: free_filter(rule);
1132: continue;
1133: }
1134: }
1135:
1136: add_rule(listp, pat, pat_len, rule, xflags);
1137:
1138: if (new_rflags & FILTRULE_CVS_IGNORE
1139: && !(new_rflags & FILTRULE_MERGE_FILE))
1140: get_cvs_excludes(new_rflags);
1141: }
1142: }
1143:
1144: void parse_filter_file(filter_rule_list *listp, const char *fname, const filter_rule *template, int xflags)
1145: {
1146: FILE *fp;
1147: char line[BIGPATHBUFLEN];
1148: char *eob = line + sizeof line - 1;
1149: BOOL word_split = (template->rflags & FILTRULE_WORD_SPLIT) != 0;
1150:
1151: if (!fname || !*fname)
1152: return;
1153:
1154: if (*fname != '-' || fname[1] || am_server) {
1155: if (daemon_filter_list.head) {
1156: strlcpy(line, fname, sizeof line);
1157: clean_fname(line, CFN_COLLAPSE_DOT_DOT_DIRS);
1158: if (check_filter(&daemon_filter_list, FLOG, line, 0) < 0)
1159: fp = NULL;
1160: else
1161: fp = fopen(line, "rb");
1162: } else
1163: fp = fopen(fname, "rb");
1164: } else
1165: fp = stdin;
1166:
1167: if (DEBUG_GTE(FILTER, 2)) {
1168: rprintf(FINFO, "[%s] parse_filter_file(%s,%x,%x)%s\n",
1169: who_am_i(), fname, template->rflags, xflags,
1170: fp ? "" : " [not found]");
1171: }
1172:
1173: if (!fp) {
1174: if (xflags & XFLG_FATAL_ERRORS) {
1175: rsyserr(FERROR, errno,
1176: "failed to open %sclude file %s",
1177: template->rflags & FILTRULE_INCLUDE ? "in" : "ex",
1178: fname);
1179: exit_cleanup(RERR_FILEIO);
1180: }
1181: return;
1182: }
1183: dirbuf[dirbuf_len] = '\0';
1184:
1185: while (1) {
1186: char *s = line;
1187: int ch, overflow = 0;
1188: while (1) {
1189: if ((ch = getc(fp)) == EOF) {
1190: if (ferror(fp) && errno == EINTR) {
1191: clearerr(fp);
1192: continue;
1193: }
1194: break;
1195: }
1196: if (word_split && isspace(ch))
1197: break;
1198: if (eol_nulls? !ch : (ch == '\n' || ch == '\r'))
1199: break;
1200: if (s < eob)
1201: *s++ = ch;
1202: else
1203: overflow = 1;
1204: }
1205: if (overflow) {
1206: rprintf(FERROR, "discarding over-long filter: %s...\n", line);
1207: s = line;
1208: }
1209: *s = '\0';
1210: /* Skip an empty token and (when line parsing) comments. */
1211: if (*line && (word_split || (*line != ';' && *line != '#')))
1212: parse_filter_str(listp, line, template, xflags);
1213: if (ch == EOF)
1214: break;
1215: }
1216: fclose(fp);
1217: }
1218:
1219: /* If the "for_xfer" flag is set, the prefix is made compatible with the
1220: * current protocol_version (if possible) or a NULL is returned (if not
1221: * possible). */
1222: char *get_rule_prefix(filter_rule *rule, const char *pat, int for_xfer,
1223: unsigned int *plen_ptr)
1224: {
1225: static char buf[MAX_RULE_PREFIX+1];
1226: char *op = buf;
1227: int legal_len = for_xfer && protocol_version < 29 ? 1 : MAX_RULE_PREFIX-1;
1228:
1229: if (rule->rflags & FILTRULE_PERDIR_MERGE) {
1230: if (legal_len == 1)
1231: return NULL;
1232: *op++ = ':';
1233: } else if (rule->rflags & FILTRULE_INCLUDE)
1234: *op++ = '+';
1235: else if (legal_len != 1
1236: || ((*pat == '-' || *pat == '+') && pat[1] == ' '))
1237: *op++ = '-';
1238: else
1239: legal_len = 0;
1240:
1241: if (rule->rflags & FILTRULE_ABS_PATH)
1242: *op++ = '/';
1243: if (rule->rflags & FILTRULE_NEGATE)
1244: *op++ = '!';
1245: if (rule->rflags & FILTRULE_CVS_IGNORE)
1246: *op++ = 'C';
1247: else {
1248: if (rule->rflags & FILTRULE_NO_INHERIT)
1249: *op++ = 'n';
1250: if (rule->rflags & FILTRULE_WORD_SPLIT)
1251: *op++ = 'w';
1252: if (rule->rflags & FILTRULE_NO_PREFIXES) {
1253: if (rule->rflags & FILTRULE_INCLUDE)
1254: *op++ = '+';
1255: else
1256: *op++ = '-';
1257: }
1258: }
1259: if (rule->rflags & FILTRULE_EXCLUDE_SELF)
1260: *op++ = 'e';
1261: if (rule->rflags & FILTRULE_SENDER_SIDE
1262: && (!for_xfer || protocol_version >= 29))
1263: *op++ = 's';
1264: if (rule->rflags & FILTRULE_RECEIVER_SIDE
1265: && (!for_xfer || protocol_version >= 29
1266: || (delete_excluded && am_sender)))
1267: *op++ = 'r';
1268: if (rule->rflags & FILTRULE_PERISHABLE) {
1269: if (!for_xfer || protocol_version >= 30)
1270: *op++ = 'p';
1271: else if (am_sender)
1272: return NULL;
1273: }
1274: if (op - buf > legal_len)
1275: return NULL;
1276: if (legal_len)
1277: *op++ = ' ';
1278: *op = '\0';
1279: if (plen_ptr)
1280: *plen_ptr = op - buf;
1281: return buf;
1282: }
1283:
1284: static void send_rules(int f_out, filter_rule_list *flp)
1285: {
1286: filter_rule *ent, *prev = NULL;
1287:
1288: for (ent = flp->head; ent; ent = ent->next) {
1289: unsigned int len, plen, dlen;
1290: int elide = 0;
1291: char *p;
1292:
1293: /* Note we need to check delete_excluded here in addition to
1294: * the code in parse_rule_tok() because some rules may have
1295: * been added before we found the --delete-excluded option.
1296: * We must also elide any CVS merge-file rules to avoid a
1297: * backward compatibility problem, and we elide any no-prefix
1298: * merge files as an optimization (since they can only have
1299: * include/exclude rules). */
1300: if (ent->rflags & FILTRULE_SENDER_SIDE)
1301: elide = am_sender ? 1 : -1;
1302: if (ent->rflags & FILTRULE_RECEIVER_SIDE)
1303: elide = elide ? 0 : am_sender ? -1 : 1;
1304: else if (delete_excluded && !elide
1305: && (!(ent->rflags & FILTRULE_PERDIR_MERGE)
1306: || ent->rflags & FILTRULE_NO_PREFIXES))
1307: elide = am_sender ? 1 : -1;
1308: if (elide < 0) {
1309: if (prev)
1310: prev->next = ent->next;
1311: else
1312: flp->head = ent->next;
1313: } else
1314: prev = ent;
1315: if (elide > 0)
1316: continue;
1317: if (ent->rflags & FILTRULE_CVS_IGNORE
1318: && !(ent->rflags & FILTRULE_MERGE_FILE)) {
1319: int f = am_sender || protocol_version < 29 ? f_out : -2;
1320: send_rules(f, &cvs_filter_list);
1321: if (f == f_out)
1322: continue;
1323: }
1324: p = get_rule_prefix(ent, ent->pattern, 1, &plen);
1325: if (!p) {
1326: rprintf(FERROR,
1327: "filter rules are too modern for remote rsync.\n");
1328: exit_cleanup(RERR_PROTOCOL);
1329: }
1330: if (f_out < 0)
1331: continue;
1332: len = strlen(ent->pattern);
1333: dlen = ent->rflags & FILTRULE_DIRECTORY ? 1 : 0;
1334: if (!(plen + len + dlen))
1335: continue;
1336: write_int(f_out, plen + len + dlen);
1337: if (plen)
1338: write_buf(f_out, p, plen);
1339: write_buf(f_out, ent->pattern, len);
1340: if (dlen)
1341: write_byte(f_out, '/');
1342: }
1343: flp->tail = prev;
1344: }
1345:
1346: /* This is only called by the client. */
1347: void send_filter_list(int f_out)
1348: {
1349: int receiver_wants_list = prune_empty_dirs
1350: || (delete_mode && (!delete_excluded || protocol_version >= 29));
1351:
1352: if (local_server || (am_sender && !receiver_wants_list))
1353: f_out = -1;
1354: if (cvs_exclude && am_sender) {
1355: if (protocol_version >= 29)
1356: parse_filter_str(&filter_list, ":C", rule_template(0), 0);
1357: parse_filter_str(&filter_list, "-C", rule_template(0), 0);
1358: }
1359:
1360: send_rules(f_out, &filter_list);
1361:
1362: if (f_out >= 0)
1363: write_int(f_out, 0);
1364:
1365: if (cvs_exclude) {
1366: if (!am_sender || protocol_version < 29)
1367: parse_filter_str(&filter_list, ":C", rule_template(0), 0);
1368: if (!am_sender)
1369: parse_filter_str(&filter_list, "-C", rule_template(0), 0);
1370: }
1371: }
1372:
1373: /* This is only called by the server. */
1374: void recv_filter_list(int f_in)
1375: {
1376: char line[BIGPATHBUFLEN];
1377: int xflags = protocol_version >= 29 ? 0 : XFLG_OLD_PREFIXES;
1378: int receiver_wants_list = prune_empty_dirs
1379: || (delete_mode
1380: && (!delete_excluded || protocol_version >= 29));
1381: unsigned int len;
1382:
1383: if (!local_server && (am_sender || receiver_wants_list)) {
1384: while ((len = read_int(f_in)) != 0) {
1385: if (len >= sizeof line)
1386: overflow_exit("recv_rules");
1387: read_sbuf(f_in, line, len);
1388: parse_filter_str(&filter_list, line, rule_template(0), xflags);
1389: }
1390: }
1391:
1392: if (cvs_exclude) {
1393: if (local_server || am_sender || protocol_version < 29)
1394: parse_filter_str(&filter_list, ":C", rule_template(0), 0);
1395: if (local_server || am_sender)
1396: parse_filter_str(&filter_list, "-C", rule_template(0), 0);
1397: }
1398:
1399: if (local_server) /* filter out any rules that aren't for us. */
1400: send_rules(-1, &filter_list);
1401: }
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