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Diffstat (limited to '')
| -rw-r--r-- | exclude.c | 1697 |
1 files changed, 1697 insertions, 0 deletions
diff --git a/exclude.c b/exclude.c new file mode 100644 index 0000000..ffe55b1 --- /dev/null +++ b/exclude.c @@ -0,0 +1,1697 @@ +/* + * The filter include/exclude routines. + * + * Copyright (C) 1996-2001 Andrew Tridgell <tridge@samba.org> + * Copyright (C) 1996 Paul Mackerras + * Copyright (C) 2002 Martin Pool + * Copyright (C) 2003-2022 Wayne Davison + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, visit the http://fsf.org website. + */ + +#include "rsync.h" +#include "ifuncs.h" + +extern int am_server; +extern int am_sender; +extern int am_generator; +extern int eol_nulls; +extern int io_error; +extern int xfer_dirs; +extern int recurse; +extern int local_server; +extern int prune_empty_dirs; +extern int ignore_perishable; +extern int relative_paths; +extern int delete_mode; +extern int delete_excluded; +extern int cvs_exclude; +extern int sanitize_paths; +extern int protocol_version; +extern int trust_sender_args; +extern int module_id; + +extern char curr_dir[MAXPATHLEN]; +extern unsigned int curr_dir_len; +extern unsigned int module_dirlen; + +filter_rule_list filter_list = { .debug_type = "" }; +filter_rule_list cvs_filter_list = { .debug_type = " [global CVS]" }; +filter_rule_list daemon_filter_list = { .debug_type = " [daemon]" }; +filter_rule_list implied_filter_list = { .debug_type = " [implied]" }; + +int saw_xattr_filter = 0; +int trust_sender_args = 0; +int trust_sender_filter = 0; + +/* Need room enough for ":MODS " prefix plus some room to grow. */ +#define MAX_RULE_PREFIX (16) + +#define SLASH_WILD3_SUFFIX "/***" + +/* The dirbuf is set by push_local_filters() to the current subdirectory + * relative to curr_dir that is being processed. The path always has a + * trailing slash appended, and the variable dirbuf_len contains the length + * of this path prefix. The path is always absolute. */ +static char dirbuf[MAXPATHLEN+1]; +static unsigned int dirbuf_len = 0; +static int dirbuf_depth; + +/* This is True when we're scanning parent dirs for per-dir merge-files. */ +static BOOL parent_dirscan = False; + +/* This array contains a list of all the currently active per-dir merge + * files. This makes it easier to save the appropriate values when we + * "push" down into each subdirectory. */ +static filter_rule **mergelist_parents; +static int mergelist_cnt = 0; +static int mergelist_size = 0; + +#define LOCAL_RULE 1 +#define REMOTE_RULE 2 +static uchar cur_elide_value = REMOTE_RULE; + +/* Each filter_list_struct describes a singly-linked list by keeping track + * of both the head and tail pointers. The list is slightly unusual in that + * a parent-dir's content can be appended to the end of the local list in a + * special way: the last item in the local list has its "next" pointer set + * to point to the inherited list, but the local list's tail pointer points + * at the end of the local list. Thus, if the local list is empty, the head + * will be pointing at the inherited content but the tail will be NULL. To + * help you visualize this, here are the possible list arrangements: + * + * Completely Empty Local Content Only + * ================================== ==================================== + * head -> NULL head -> Local1 -> Local2 -> NULL + * tail -> NULL tail -------------^ + * + * Inherited Content Only Both Local and Inherited Content + * ================================== ==================================== + * head -> Parent1 -> Parent2 -> NULL head -> L1 -> L2 -> P1 -> P2 -> NULL + * tail -> NULL tail ---------^ + * + * This means that anyone wanting to traverse the whole list to use it just + * needs to start at the head and use the "next" pointers until it goes + * NULL. To add new local content, we insert the item after the tail item + * and update the tail (obviously, if "tail" was NULL, we insert it at the + * head). To clear the local list, WE MUST NOT FREE THE INHERITED CONTENT + * because it is shared between the current list and our parent list(s). + * The easiest way to handle this is to simply truncate the list after the + * tail item and then free the local list from the head. When inheriting + * the list for a new local dir, we just save off the filter_list_struct + * values (so we can pop back to them later) and set the tail to NULL. + */ + +static void teardown_mergelist(filter_rule *ex) +{ + int j; + + if (!ex->u.mergelist) + return; + + if (DEBUG_GTE(FILTER, 2)) { + rprintf(FINFO, "[%s] deactivating mergelist #%d%s\n", + who_am_i(), mergelist_cnt - 1, + ex->u.mergelist->debug_type); + } + + free(ex->u.mergelist->debug_type); + free(ex->u.mergelist); + + for (j = 0; j < mergelist_cnt; j++) { + if (mergelist_parents[j] == ex) { + mergelist_parents[j] = NULL; + break; + } + } + while (mergelist_cnt && mergelist_parents[mergelist_cnt-1] == NULL) + mergelist_cnt--; +} + +static void free_filter(filter_rule *ex) +{ + if (ex->rflags & FILTRULE_PERDIR_MERGE) + teardown_mergelist(ex); + free(ex->pattern); + free(ex); +} + +static void free_filters(filter_rule *ent) +{ + while (ent) { + filter_rule *next = ent->next; + free_filter(ent); + ent = next; + } +} + +/* Build a filter structure given a filter pattern. The value in "pat" + * is not null-terminated. "rule" is either held or freed, so the + * caller should not free it. */ +static void add_rule(filter_rule_list *listp, const char *pat, unsigned int pat_len, + filter_rule *rule, int xflags) +{ + const char *cp; + unsigned int pre_len, suf_len, slash_cnt = 0; + char *mention_rule_suffix; + + if (DEBUG_GTE(FILTER, 1) && pat_len && (pat[pat_len-1] == ' ' || pat[pat_len-1] == '\t')) + mention_rule_suffix = " -- CAUTION: trailing whitespace!"; + else + mention_rule_suffix = DEBUG_GTE(FILTER, 2) ? "" : NULL; + if (mention_rule_suffix) { + rprintf(FINFO, "[%s] add_rule(%s%.*s%s)%s%s\n", + who_am_i(), get_rule_prefix(rule, pat, 0, NULL), + (int)pat_len, pat, (rule->rflags & FILTRULE_DIRECTORY) ? "/" : "", + listp->debug_type, mention_rule_suffix); + } + + /* These flags also indicate that we're reading a list that + * needs to be filtered now, not post-filtered later. */ + if (xflags & (XFLG_ANCHORED2ABS|XFLG_ABS_IF_SLASH) + && (rule->rflags & FILTRULES_SIDES) + == (am_sender ? FILTRULE_RECEIVER_SIDE : FILTRULE_SENDER_SIDE)) { + /* This filter applies only to the other side. Drop it. */ + free_filter(rule); + return; + } + + if (pat_len > 1 && pat[pat_len-1] == '/') { + pat_len--; + rule->rflags |= FILTRULE_DIRECTORY; + } + + for (cp = pat; cp < pat + pat_len; cp++) { + if (*cp == '/') + slash_cnt++; + } + + if (!(rule->rflags & (FILTRULE_ABS_PATH | FILTRULE_MERGE_FILE)) + && ((xflags & (XFLG_ANCHORED2ABS|XFLG_ABS_IF_SLASH) && *pat == '/') + || (xflags & XFLG_ABS_IF_SLASH && slash_cnt))) { + rule->rflags |= FILTRULE_ABS_PATH; + if (*pat == '/') + pre_len = dirbuf_len - module_dirlen - 1; + else + pre_len = 0; + } else + pre_len = 0; + + /* The daemon wants dir-exclude rules to get an appended "/" + "***". */ + if (xflags & XFLG_DIR2WILD3 + && BITS_SETnUNSET(rule->rflags, FILTRULE_DIRECTORY, FILTRULE_INCLUDE)) { + rule->rflags &= ~FILTRULE_DIRECTORY; + suf_len = sizeof SLASH_WILD3_SUFFIX - 1; + } else + suf_len = 0; + + rule->pattern = new_array(char, pre_len + pat_len + suf_len + 1); + if (pre_len) { + memcpy(rule->pattern, dirbuf + module_dirlen, pre_len); + for (cp = rule->pattern; cp < rule->pattern + pre_len; cp++) { + if (*cp == '/') + slash_cnt++; + } + } + rule->elide = 0; + strlcpy(rule->pattern + pre_len, pat, pat_len + 1); + pat_len += pre_len; + if (suf_len) { + memcpy(rule->pattern + pat_len, SLASH_WILD3_SUFFIX, suf_len+1); + pat_len += suf_len; + slash_cnt++; + } + + if (strpbrk(rule->pattern, "*[?")) { + rule->rflags |= FILTRULE_WILD; + if ((cp = strstr(rule->pattern, "**")) != NULL) { + rule->rflags |= FILTRULE_WILD2; + /* If the pattern starts with **, note that. */ + if (cp == rule->pattern) + rule->rflags |= FILTRULE_WILD2_PREFIX; + /* If the pattern ends with ***, note that. */ + if (pat_len >= 3 + && rule->pattern[pat_len-3] == '*' + && rule->pattern[pat_len-2] == '*' + && rule->pattern[pat_len-1] == '*') + rule->rflags |= FILTRULE_WILD3_SUFFIX; + } + } + + if (rule->rflags & FILTRULE_PERDIR_MERGE) { + filter_rule_list *lp; + unsigned int len; + int i; + + if ((cp = strrchr(rule->pattern, '/')) != NULL) + cp++; + else + cp = rule->pattern; + + /* If the local merge file was already mentioned, don't + * add it again. */ + for (i = 0; i < mergelist_cnt; i++) { + filter_rule *ex = mergelist_parents[i]; + const char *s; + if (!ex) + continue; + s = strrchr(ex->pattern, '/'); + if (s) + s++; + else + s = ex->pattern; + len = strlen(s); + if (len == pat_len - (cp - rule->pattern) && memcmp(s, cp, len) == 0) { + free_filter(rule); + return; + } + } + + lp = new_array0(filter_rule_list, 1); + if (asprintf(&lp->debug_type, " [per-dir %s]", cp) < 0) + out_of_memory("add_rule"); + rule->u.mergelist = lp; + + if (mergelist_cnt == mergelist_size) { + mergelist_size += 5; + mergelist_parents = realloc_array(mergelist_parents, filter_rule *, mergelist_size); + } + if (DEBUG_GTE(FILTER, 2)) { + rprintf(FINFO, "[%s] activating mergelist #%d%s\n", + who_am_i(), mergelist_cnt, lp->debug_type); + } + mergelist_parents[mergelist_cnt++] = rule; + } else + rule->u.slash_cnt = slash_cnt; + + if (!listp->tail) { + rule->next = listp->head; + listp->head = listp->tail = rule; + } else { + rule->next = listp->tail->next; + listp->tail->next = rule; + listp->tail = rule; + } +} + +/* If the wildcards failed, the remote shell might give us a file matching the literal + * wildcards. Since "*" & "?" already match themselves, this just needs to deal with + * failed "[foo]" idioms. + */ +static void maybe_add_literal_brackets_rule(filter_rule const *based_on, int arg_len) +{ + filter_rule *rule; + const char *arg = based_on->pattern, *cp; + char *p; + int cnt = 0; + + if (arg_len < 0) + arg_len = strlen(arg); + + for (cp = arg; *cp; cp++) { + if (*cp == '\\' && cp[1]) { + cp++; + } else if (*cp == '[') + cnt++; + } + if (!cnt) + return; + + rule = new0(filter_rule); + rule->rflags = based_on->rflags; + rule->u.slash_cnt = based_on->u.slash_cnt; + p = rule->pattern = new_array(char, arg_len + cnt + 1); + for (cp = arg; *cp; ) { + if (*cp == '\\' && cp[1]) { + *p++ = *cp++; + } else if (*cp == '[') + *p++ = '\\'; + *p++ = *cp++; + } + *p++ = '\0'; + + rule->next = implied_filter_list.head; + implied_filter_list.head = rule; + if (DEBUG_GTE(FILTER, 3)) { + rprintf(FINFO, "[%s] add_implied_include(%s%s)\n", who_am_i(), rule->pattern, + rule->rflags & FILTRULE_DIRECTORY ? "/" : ""); + } +} + +static char *partial_string_buf = NULL; +static int partial_string_len = 0; +void implied_include_partial_string(const char *s_start, const char *s_end) +{ + partial_string_len = s_end - s_start; + if (partial_string_len <= 0 || partial_string_len >= MAXPATHLEN) { /* too-large should be impossible... */ + partial_string_len = 0; + return; + } + if (!partial_string_buf) + partial_string_buf = new_array(char, MAXPATHLEN); + memcpy(partial_string_buf, s_start, partial_string_len); +} + +void free_implied_include_partial_string() +{ + if (partial_string_buf) { + if (partial_string_len) + add_implied_include("", 0); + free(partial_string_buf); + partial_string_buf = NULL; + } + partial_string_len = 0; /* paranoia */ +} + +/* Each arg the client sends to the remote sender turns into an implied include + * that the receiver uses to validate the file list from the sender. */ +void add_implied_include(const char *arg, int skip_daemon_module) +{ + int arg_len, saw_wild = 0, saw_live_open_brkt = 0, backslash_cnt = 0; + int slash_cnt = 0; + const char *cp; + char *p; + if (trust_sender_args) + return; + if (partial_string_len) { + arg_len = strlen(arg); + if (partial_string_len + arg_len >= MAXPATHLEN) { + partial_string_len = 0; + return; /* Should be impossible... */ + } + memcpy(partial_string_buf + partial_string_len, arg, arg_len + 1); + partial_string_len = 0; + arg = partial_string_buf; + } + if (skip_daemon_module) { + if ((cp = strchr(arg, '/')) != NULL) + arg = cp + 1; + else + arg = ""; + } + if (relative_paths) { + if ((cp = strstr(arg, "/./")) != NULL) + arg = cp + 3; + } else if ((cp = strrchr(arg, '/')) != NULL) { + arg = cp + 1; + } + if (*arg == '.' && arg[1] == '\0') + arg++; + arg_len = strlen(arg); + if (arg_len) { + char *new_pat; + if (strpbrk(arg, "*[?")) { + /* We need to add room to escape backslashes if wildcard chars are present. */ + for (cp = arg; (cp = strchr(cp, '\\')) != NULL; cp++) + arg_len++; + saw_wild = 1; + } + arg_len++; /* Leave room for the prefixed slash */ + p = new_pat = new_array(char, arg_len + 1); + *p++ = '/'; + slash_cnt++; + for (cp = arg; *cp; ) { + switch (*cp) { + case '\\': + if (cp[1] == ']') { + if (!saw_wild) + cp++; /* A \] in a non-wild filter causes a problem, so drop the \ . */ + } else if (!strchr("*[?", cp[1])) { + backslash_cnt++; + if (saw_wild) + *p++ = '\\'; + } + *p++ = *cp++; + break; + case '/': + if (p[-1] == '/') { /* This is safe because of the initial slash. */ + if (*++cp == '\0') { + slash_cnt--; + p--; + } + } else if (cp[1] == '\0') { + cp++; + } else { + slash_cnt++; + *p++ = *cp++; + } + break; + case '.': + if (p[-1] == '/') { + if (cp[1] == '/') { + cp += 2; + if (!*cp) { + slash_cnt--; + p--; + } + } else if (cp[1] == '\0') { + cp++; + slash_cnt--; + p--; + } else + *p++ = *cp++; + } else + *p++ = *cp++; + break; + case '[': + saw_live_open_brkt = 1; + *p++ = *cp++; + break; + default: + *p++ = *cp++; + break; + } + } + *p = '\0'; + arg_len = p - new_pat; + if (!arg_len) + free(new_pat); + else { + filter_rule *rule = new0(filter_rule); + rule->rflags = FILTRULE_INCLUDE + (saw_wild ? FILTRULE_WILD : 0); + rule->u.slash_cnt = slash_cnt; + arg = rule->pattern = new_pat; + if (!implied_filter_list.head) + implied_filter_list.head = implied_filter_list.tail = rule; + else { + rule->next = implied_filter_list.head; + implied_filter_list.head = rule; + } + if (DEBUG_GTE(FILTER, 3)) + rprintf(FINFO, "[%s] add_implied_include(%s)\n", who_am_i(), arg); + if (saw_live_open_brkt) + maybe_add_literal_brackets_rule(rule, arg_len); + if (relative_paths && slash_cnt) { + int sub_slash_cnt = slash_cnt; + while ((p = strrchr(new_pat, '/')) != NULL && p != new_pat) { + filter_rule const *ent; + filter_rule *R_rule; + int found = 0; + *p = '\0'; + for (ent = implied_filter_list.head; ent; ent = ent->next) { + if (ent != rule && strcmp(ent->pattern, new_pat) == 0) { + found = 1; + break; + } + } + if (found) { + *p = '/'; + break; /* We added all parent dirs already */ + } + R_rule = new0(filter_rule); + R_rule->rflags = FILTRULE_INCLUDE | FILTRULE_DIRECTORY; + /* Check if our sub-path has wildcards or escaped backslashes */ + if (saw_wild && strpbrk(new_pat, "*[?\\")) + R_rule->rflags |= FILTRULE_WILD; + R_rule->pattern = strdup(new_pat); + R_rule->u.slash_cnt = --sub_slash_cnt; + R_rule->next = implied_filter_list.head; + implied_filter_list.head = R_rule; + if (DEBUG_GTE(FILTER, 3)) { + rprintf(FINFO, "[%s] add_implied_include(%s/)\n", + who_am_i(), R_rule->pattern); + } + if (saw_live_open_brkt) + maybe_add_literal_brackets_rule(R_rule, -1); + } + for (p = new_pat; sub_slash_cnt < slash_cnt; sub_slash_cnt++) { + p += strlen(p); + *p = '/'; + } + } + } + } + + if (recurse || xfer_dirs) { + /* Now create a rule with an added "/" & "**" or "*" at the end */ + filter_rule *rule = new0(filter_rule); + rule->rflags = FILTRULE_INCLUDE | FILTRULE_WILD; + if (recurse) + rule->rflags |= FILTRULE_WILD2; + /* We must leave enough room for / * * \0. */ + if (!saw_wild && backslash_cnt) { + /* We are appending a wildcard, so now the backslashes need to be escaped. */ + p = rule->pattern = new_array(char, arg_len + backslash_cnt + 3 + 1); + for (cp = arg; *cp; ) { /* Note that arg_len != 0 because backslash_cnt > 0 */ + if (*cp == '\\') + *p++ = '\\'; + *p++ = *cp++; + } + } else { + p = rule->pattern = new_array(char, arg_len + 3 + 1); + if (arg_len) { + memcpy(p, arg, arg_len); + p += arg_len; + } + } + *p++ = '/'; + *p++ = '*'; + if (recurse) + *p++ = '*'; + *p = '\0'; + rule->u.slash_cnt = slash_cnt + 1; + rule->next = implied_filter_list.head; + implied_filter_list.head = rule; + if (DEBUG_GTE(FILTER, 3)) + rprintf(FINFO, "[%s] add_implied_include(%s)\n", who_am_i(), rule->pattern); + if (saw_live_open_brkt) + maybe_add_literal_brackets_rule(rule, p - rule->pattern); + } +} + +/* This frees any non-inherited items, leaving just inherited items on the list. */ +static void pop_filter_list(filter_rule_list *listp) +{ + filter_rule *inherited; + + if (!listp->tail) + return; + + inherited = listp->tail->next; + + /* Truncate any inherited items from the local list. */ + listp->tail->next = NULL; + /* Now free everything that is left. */ + free_filters(listp->head); + + listp->head = inherited; + listp->tail = NULL; +} + +/* This returns an expanded (absolute) filename for the merge-file name if + * the name has any slashes in it OR if the parent_dirscan var is True; + * otherwise it returns the original merge_file name. If the len_ptr value + * is non-NULL the merge_file name is limited by the referenced length + * value and will be updated with the length of the resulting name. We + * always return a name that is null terminated, even if the merge_file + * name was not. */ +static char *parse_merge_name(const char *merge_file, unsigned int *len_ptr, + unsigned int prefix_skip) +{ + static char buf[MAXPATHLEN]; + char *fn, tmpbuf[MAXPATHLEN]; + unsigned int fn_len; + + if (!parent_dirscan && *merge_file != '/') { + /* Return the name unchanged it doesn't have any slashes. */ + if (len_ptr) { + const char *p = merge_file + *len_ptr; + while (--p > merge_file && *p != '/') {} + if (p == merge_file) { + strlcpy(buf, merge_file, *len_ptr + 1); + return buf; + } + } else if (strchr(merge_file, '/') == NULL) + return (char *)merge_file; + } + + fn = *merge_file == '/' ? buf : tmpbuf; + if (sanitize_paths) { + const char *r = prefix_skip ? "/" : NULL; + /* null-terminate the name if it isn't already */ + if (len_ptr && merge_file[*len_ptr]) { + char *to = fn == buf ? tmpbuf : buf; + strlcpy(to, merge_file, *len_ptr + 1); + merge_file = to; + } + if (!sanitize_path(fn, merge_file, r, dirbuf_depth, SP_DEFAULT)) { + rprintf(FERROR, "merge-file name overflows: %s\n", + merge_file); + return NULL; + } + fn_len = strlen(fn); + } else { + strlcpy(fn, merge_file, len_ptr ? *len_ptr + 1 : MAXPATHLEN); + fn_len = clean_fname(fn, CFN_COLLAPSE_DOT_DOT_DIRS); + } + + /* If the name isn't in buf yet, it wasn't absolute. */ + if (fn != buf) { + int d_len = dirbuf_len - prefix_skip; + if (d_len + fn_len >= MAXPATHLEN) { + rprintf(FERROR, "merge-file name overflows: %s\n", fn); + return NULL; + } + memcpy(buf, dirbuf + prefix_skip, d_len); + memcpy(buf + d_len, fn, fn_len + 1); + fn_len = clean_fname(buf, CFN_COLLAPSE_DOT_DOT_DIRS); + } + + if (len_ptr) + *len_ptr = fn_len; + return buf; +} + +/* Sets the dirbuf and dirbuf_len values. */ +void set_filter_dir(const char *dir, unsigned int dirlen) +{ + unsigned int len; + if (*dir != '/') { + memcpy(dirbuf, curr_dir, curr_dir_len); + dirbuf[curr_dir_len] = '/'; + len = curr_dir_len + 1; + if (len + dirlen >= MAXPATHLEN) + dirlen = 0; + } else + len = 0; + memcpy(dirbuf + len, dir, dirlen); + dirbuf[dirlen + len] = '\0'; + dirbuf_len = clean_fname(dirbuf, CFN_COLLAPSE_DOT_DOT_DIRS); + if (dirbuf_len > 1 && dirbuf[dirbuf_len-1] == '.' + && dirbuf[dirbuf_len-2] == '/') + dirbuf_len -= 2; + if (dirbuf_len != 1) + dirbuf[dirbuf_len++] = '/'; + dirbuf[dirbuf_len] = '\0'; + if (sanitize_paths) + dirbuf_depth = count_dir_elements(dirbuf + module_dirlen); +} + +/* This routine takes a per-dir merge-file entry and finishes its setup. + * If the name has a path portion then we check to see if it refers to a + * parent directory of the first transfer dir. If it does, we scan all the + * dirs from that point through the parent dir of the transfer dir looking + * for the per-dir merge-file in each one. */ +static BOOL setup_merge_file(int mergelist_num, filter_rule *ex, + filter_rule_list *lp) +{ + char buf[MAXPATHLEN]; + char *x, *y, *pat = ex->pattern; + unsigned int len; + + if (!(x = parse_merge_name(pat, NULL, 0)) || *x != '/') + return 0; + + if (DEBUG_GTE(FILTER, 2)) { + rprintf(FINFO, "[%s] performing parent_dirscan for mergelist #%d%s\n", + who_am_i(), mergelist_num, lp->debug_type); + } + y = strrchr(x, '/'); + *y = '\0'; + ex->pattern = strdup(y+1); + if (!*x) + x = "/"; + if (*x == '/') + strlcpy(buf, x, MAXPATHLEN); + else + pathjoin(buf, MAXPATHLEN, dirbuf, x); + + len = clean_fname(buf, CFN_COLLAPSE_DOT_DOT_DIRS); + if (len != 1 && len < MAXPATHLEN-1) { + buf[len++] = '/'; + buf[len] = '\0'; + } + /* This ensures that the specified dir is a parent of the transfer. */ + for (x = buf, y = dirbuf; *x && *x == *y; x++, y++) {} + if (*x) + y += strlen(y); /* nope -- skip the scan */ + + parent_dirscan = True; + while (*y) { + char save[MAXPATHLEN]; + strlcpy(save, y, MAXPATHLEN); + *y = '\0'; + dirbuf_len = y - dirbuf; + strlcpy(x, ex->pattern, MAXPATHLEN - (x - buf)); + parse_filter_file(lp, buf, ex, XFLG_ANCHORED2ABS); + if (ex->rflags & FILTRULE_NO_INHERIT) { + /* Free the undesired rules to clean up any per-dir + * mergelists they defined. Otherwise pop_local_filters + * may crash trying to restore nonexistent state for + * those mergelists. */ + free_filters(lp->head); + lp->head = NULL; + } + lp->tail = NULL; + strlcpy(y, save, MAXPATHLEN); + while ((*x++ = *y++) != '/') {} + } + parent_dirscan = False; + if (DEBUG_GTE(FILTER, 2)) { + rprintf(FINFO, "[%s] completed parent_dirscan for mergelist #%d%s\n", + who_am_i(), mergelist_num, lp->debug_type); + } + free(pat); + return 1; +} + +struct local_filter_state { + int mergelist_cnt; + filter_rule_list mergelists[1]; +}; + +/* Each time rsync changes to a new directory it call this function to + * handle all the per-dir merge-files. The "dir" value is the current path + * relative to curr_dir (which might not be null-terminated). We copy it + * into dirbuf so that we can easily append a file name on the end. */ +void *push_local_filters(const char *dir, unsigned int dirlen) +{ + struct local_filter_state *push; + int i; + + set_filter_dir(dir, dirlen); + if (DEBUG_GTE(FILTER, 2)) { + rprintf(FINFO, "[%s] pushing local filters for %s\n", + who_am_i(), dirbuf); + } + + if (!mergelist_cnt) { + /* No old state to save and no new merge files to push. */ + return NULL; + } + + push = (struct local_filter_state *)new_array(char, + sizeof (struct local_filter_state) + + (mergelist_cnt-1) * sizeof (filter_rule_list)); + + push->mergelist_cnt = mergelist_cnt; + for (i = 0; i < mergelist_cnt; i++) { + filter_rule *ex = mergelist_parents[i]; + if (!ex) + continue; + memcpy(&push->mergelists[i], ex->u.mergelist, sizeof (filter_rule_list)); + } + + /* Note: parse_filter_file() might increase mergelist_cnt, so keep + * this loop separate from the above loop. */ + for (i = 0; i < mergelist_cnt; i++) { + filter_rule *ex = mergelist_parents[i]; + filter_rule_list *lp; + if (!ex) + continue; + lp = ex->u.mergelist; + + if (DEBUG_GTE(FILTER, 2)) { + rprintf(FINFO, "[%s] pushing mergelist #%d%s\n", + who_am_i(), i, lp->debug_type); + } + + lp->tail = NULL; /* Switch any local rules to inherited. */ + if (ex->rflags & FILTRULE_NO_INHERIT) + lp->head = NULL; + + if (ex->rflags & FILTRULE_FINISH_SETUP) { + ex->rflags &= ~FILTRULE_FINISH_SETUP; + if (setup_merge_file(i, ex, lp)) + set_filter_dir(dir, dirlen); + } + + if (strlcpy(dirbuf + dirbuf_len, ex->pattern, + MAXPATHLEN - dirbuf_len) < MAXPATHLEN - dirbuf_len) { + parse_filter_file(lp, dirbuf, ex, + XFLG_ANCHORED2ABS); + } else { + io_error |= IOERR_GENERAL; + rprintf(FERROR, + "cannot add local filter rules in long-named directory: %s\n", + full_fname(dirbuf)); + } + dirbuf[dirbuf_len] = '\0'; + } + + return (void*)push; +} + +void pop_local_filters(void *mem) +{ + struct local_filter_state *pop = (struct local_filter_state *)mem; + int i; + int old_mergelist_cnt = pop ? pop->mergelist_cnt : 0; + + if (DEBUG_GTE(FILTER, 2)) + rprintf(FINFO, "[%s] popping local filters\n", who_am_i()); + + for (i = mergelist_cnt; i-- > 0; ) { + filter_rule *ex = mergelist_parents[i]; + filter_rule_list *lp; + if (!ex) + continue; + lp = ex->u.mergelist; + + if (DEBUG_GTE(FILTER, 2)) { + rprintf(FINFO, "[%s] popping mergelist #%d%s\n", + who_am_i(), i, lp->debug_type); + } + + pop_filter_list(lp); + if (i >= old_mergelist_cnt && lp->head) { + /* This mergelist does not exist in the state to be restored, but it + * still has inherited rules. This can sometimes happen if a per-dir + * merge file calls setup_merge_file() in push_local_filters() and that + * leaves some inherited rules that aren't in the pushed list state. */ + if (DEBUG_GTE(FILTER, 2)) { + rprintf(FINFO, "[%s] freeing parent_dirscan filters of mergelist #%d%s\n", + who_am_i(), i, ex->u.mergelist->debug_type); + } + pop_filter_list(lp); + } + } + + if (!pop) + return; /* No state to restore. */ + + for (i = 0; i < old_mergelist_cnt; i++) { + filter_rule *ex = mergelist_parents[i]; + if (!ex) + continue; + memcpy(ex->u.mergelist, &pop->mergelists[i], sizeof (filter_rule_list)); + } + + free(pop); +} + +void change_local_filter_dir(const char *dname, int dlen, int dir_depth) +{ + static int cur_depth = -1; + static void *filt_array[MAXPATHLEN/2+1]; + + if (!dname) { + for ( ; cur_depth >= 0; cur_depth--) { + if (filt_array[cur_depth]) { + pop_local_filters(filt_array[cur_depth]); + filt_array[cur_depth] = NULL; + } + } + return; + } + + assert(dir_depth < MAXPATHLEN/2+1); + + for ( ; cur_depth >= dir_depth; cur_depth--) { + if (filt_array[cur_depth]) { + pop_local_filters(filt_array[cur_depth]); + filt_array[cur_depth] = NULL; + } + } + + cur_depth = dir_depth; + filt_array[cur_depth] = push_local_filters(dname, dlen); +} + +static int rule_matches(const char *fname, filter_rule *ex, int name_flags) +{ + int slash_handling, str_cnt = 0, anchored_match = 0; + int ret_match = ex->rflags & FILTRULE_NEGATE ? 0 : 1; + char *p, *pattern = ex->pattern; + const char *strings[16]; /* more than enough */ + const char *name = fname + (*fname == '/'); + + if (!*name || ex->elide == cur_elide_value) + return 0; + + if (!(name_flags & NAME_IS_XATTR) ^ !(ex->rflags & FILTRULE_XATTR)) + return 0; + + if (!ex->u.slash_cnt && !(ex->rflags & FILTRULE_WILD2)) { + /* If the pattern does not have any slashes AND it does + * not have a "**" (which could match a slash), then we + * just match the name portion of the path. */ + if ((p = strrchr(name,'/')) != NULL) + name = p+1; + } else if (ex->rflags & FILTRULE_ABS_PATH && *fname != '/' + && curr_dir_len > module_dirlen + 1) { + /* If we're matching against an absolute-path pattern, + * we need to prepend our full path info. */ + strings[str_cnt++] = curr_dir + module_dirlen + 1; + strings[str_cnt++] = "/"; + } else if (ex->rflags & FILTRULE_WILD2_PREFIX && *fname != '/') { + /* Allow "**"+"/" to match at the start of the string. */ + strings[str_cnt++] = "/"; + } + strings[str_cnt++] = name; + if (name_flags & NAME_IS_DIR) { + /* Allow a trailing "/"+"***" to match the directory. */ + if (ex->rflags & FILTRULE_WILD3_SUFFIX) + strings[str_cnt++] = "/"; + } else if (ex->rflags & FILTRULE_DIRECTORY) + return !ret_match; + strings[str_cnt] = NULL; + + if (*pattern == '/') { + anchored_match = 1; + pattern++; + } + + if (!anchored_match && ex->u.slash_cnt + && !(ex->rflags & FILTRULE_WILD2)) { + /* A non-anchored match with an infix slash and no "**" + * needs to match the last slash_cnt+1 name elements. */ + slash_handling = ex->u.slash_cnt + 1; + } else if (!anchored_match && !(ex->rflags & FILTRULE_WILD2_PREFIX) + && ex->rflags & FILTRULE_WILD2) { + /* A non-anchored match with an infix or trailing "**" (but not + * a prefixed "**") needs to try matching after every slash. */ + slash_handling = -1; + } else { + /* The pattern matches only at the start of the path or name. */ + slash_handling = 0; + } + + if (ex->rflags & FILTRULE_WILD) { + if (wildmatch_array(pattern, strings, slash_handling)) + return ret_match; + } else if (str_cnt > 1) { + if (litmatch_array(pattern, strings, slash_handling)) + return ret_match; + } else if (anchored_match) { + if (strcmp(name, pattern) == 0) + return ret_match; + } else { + int l1 = strlen(name); + int l2 = strlen(pattern); + if (l2 <= l1 && + strcmp(name+(l1-l2),pattern) == 0 && + (l1==l2 || name[l1-(l2+1)] == '/')) { + return ret_match; + } + } + + return !ret_match; +} + +static void report_filter_result(enum logcode code, char const *name, + filter_rule const *ent, + int name_flags, const char *type) +{ + int log_level = am_sender || am_generator ? 1 : 3; + + /* If a trailing slash is present to match only directories, + * then it is stripped out by add_rule(). So as a special + * case we add it back in the log output. */ + if (DEBUG_GTE(FILTER, log_level)) { + static char *actions[2][2] + = { {"show", "hid"}, {"risk", "protect"} }; + const char *w = who_am_i(); + const char *t = name_flags & NAME_IS_XATTR ? "xattr" + : name_flags & NAME_IS_DIR ? "directory" + : "file"; + rprintf(code, "[%s] %sing %s %s because of pattern %s%s%s\n", + w, actions[*w=='g'][!(ent->rflags & FILTRULE_INCLUDE)], + t, name, ent->pattern, + ent->rflags & FILTRULE_DIRECTORY ? "/" : "", type); + } +} + +/* This function is used to check if a file should be included/excluded + * from the list of files based on its name and type etc. The value of + * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */ +int name_is_excluded(const char *fname, int name_flags, int filter_level) +{ + if (daemon_filter_list.head && check_filter(&daemon_filter_list, FLOG, fname, name_flags) < 0) { + if (!(name_flags & NAME_IS_XATTR)) + errno = ENOENT; + return 1; + } + + if (filter_level != ALL_FILTERS) + return 0; + + if (filter_list.head && check_filter(&filter_list, FINFO, fname, name_flags) < 0) + return 1; + + return 0; +} + +int check_server_filter(filter_rule_list *listp, enum logcode code, const char *name, int name_flags) +{ + int ret; + cur_elide_value = LOCAL_RULE; + ret = check_filter(listp, code, name, name_flags); + cur_elide_value = REMOTE_RULE; + return ret; +} + +/* Return -1 if file "name" is defined to be excluded by the specified + * exclude list, 1 if it is included, and 0 if it was not matched. */ +int check_filter(filter_rule_list *listp, enum logcode code, + const char *name, int name_flags) +{ + filter_rule *ent; + + for (ent = listp->head; ent; ent = ent->next) { + if (ignore_perishable && ent->rflags & FILTRULE_PERISHABLE) + continue; + if (ent->rflags & FILTRULE_PERDIR_MERGE) { + int rc = check_filter(ent->u.mergelist, code, name, name_flags); + if (rc) + return rc; + continue; + } + if (ent->rflags & FILTRULE_CVS_IGNORE) { + int rc = check_filter(&cvs_filter_list, code, name, name_flags); + if (rc) + return rc; + continue; + } + if (rule_matches(name, ent, name_flags)) { + report_filter_result(code, name, ent, name_flags, listp->debug_type); + return ent->rflags & FILTRULE_INCLUDE ? 1 : -1; + } + } + + return 0; +} + +#define RULE_STRCMP(s,r) rule_strcmp((s), (r), sizeof (r) - 1) + +static const uchar *rule_strcmp(const uchar *str, const char *rule, int rule_len) +{ + if (strncmp((char*)str, rule, rule_len) != 0) + return NULL; + if (isspace(str[rule_len]) || str[rule_len] == '_' || !str[rule_len]) + return str + rule_len - 1; + if (str[rule_len] == ',') + return str + rule_len; + return NULL; +} + +#define FILTRULES_FROM_CONTAINER (FILTRULE_ABS_PATH | FILTRULE_INCLUDE \ + | FILTRULE_DIRECTORY | FILTRULE_NEGATE \ + | FILTRULE_PERISHABLE) + +/* Gets the next include/exclude rule from *rulestr_ptr and advances + * *rulestr_ptr to point beyond it. Stores the pattern's start (within + * *rulestr_ptr) and length in *pat_ptr and *pat_len_ptr, and returns a newly + * allocated filter_rule containing the rest of the information. Returns + * NULL if there are no more rules in the input. + * + * The template provides defaults for the new rule to inherit, and the + * template rflags and the xflags additionally affect parsing. */ +static filter_rule *parse_rule_tok(const char **rulestr_ptr, + const filter_rule *template, int xflags, + const char **pat_ptr, unsigned int *pat_len_ptr) +{ + const uchar *s = (const uchar *)*rulestr_ptr; + filter_rule *rule; + unsigned int len; + + if (template->rflags & FILTRULE_WORD_SPLIT) { + /* Skip over any initial whitespace. */ + while (isspace(*s)) + s++; + /* Update to point to real start of rule. */ + *rulestr_ptr = (const char *)s; + } + if (!*s) + return NULL; + + rule = new0(filter_rule); + + /* Inherit from the template. Don't inherit FILTRULES_SIDES; we check + * that later. */ + rule->rflags = template->rflags & FILTRULES_FROM_CONTAINER; + + /* Figure out what kind of a filter rule "s" is pointing at. Note + * that if FILTRULE_NO_PREFIXES is set, the rule is either an include + * or an exclude based on the inheritance of the FILTRULE_INCLUDE + * flag (above). XFLG_OLD_PREFIXES indicates a compatibility mode + * for old include/exclude patterns where just "+ " and "- " are + * allowed as optional prefixes. */ + if (template->rflags & FILTRULE_NO_PREFIXES) { + if (*s == '!' && template->rflags & FILTRULE_CVS_IGNORE) + rule->rflags |= FILTRULE_CLEAR_LIST; /* Tentative! */ + } else if (xflags & XFLG_OLD_PREFIXES) { + if (*s == '-' && s[1] == ' ') { + rule->rflags &= ~FILTRULE_INCLUDE; + s += 2; + } else if (*s == '+' && s[1] == ' ') { + rule->rflags |= FILTRULE_INCLUDE; + s += 2; + } else if (*s == '!') + rule->rflags |= FILTRULE_CLEAR_LIST; /* Tentative! */ + } else { + char ch = 0; + BOOL prefix_specifies_side = False; + switch (*s) { + case 'c': + if ((s = RULE_STRCMP(s, "clear")) != NULL) + ch = '!'; + break; + case 'd': + if ((s = RULE_STRCMP(s, "dir-merge")) != NULL) + ch = ':'; + break; + case 'e': + if ((s = RULE_STRCMP(s, "exclude")) != NULL) + ch = '-'; + break; + case 'h': + if ((s = RULE_STRCMP(s, "hide")) != NULL) + ch = 'H'; + break; + case 'i': + if ((s = RULE_STRCMP(s, "include")) != NULL) + ch = '+'; + break; + case 'm': + if ((s = RULE_STRCMP(s, "merge")) != NULL) + ch = '.'; + break; + case 'p': + if ((s = RULE_STRCMP(s, "protect")) != NULL) + ch = 'P'; + break; + case 'r': + if ((s = RULE_STRCMP(s, "risk")) != NULL) + ch = 'R'; + break; + case 's': + if ((s = RULE_STRCMP(s, "show")) != NULL) + ch = 'S'; + break; + default: + ch = *s; + if (s[1] == ',') + s++; + break; + } + switch (ch) { + case ':': + trust_sender_filter = 1; + rule->rflags |= FILTRULE_PERDIR_MERGE + | FILTRULE_FINISH_SETUP; + /* FALL THROUGH */ + case '.': + rule->rflags |= FILTRULE_MERGE_FILE; + break; + case '+': + rule->rflags |= FILTRULE_INCLUDE; + break; + case '-': + break; + case 'S': + rule->rflags |= FILTRULE_INCLUDE; + /* FALL THROUGH */ + case 'H': + rule->rflags |= FILTRULE_SENDER_SIDE; + prefix_specifies_side = True; + break; + case 'R': + rule->rflags |= FILTRULE_INCLUDE; + /* FALL THROUGH */ + case 'P': + rule->rflags |= FILTRULE_RECEIVER_SIDE; + prefix_specifies_side = True; + break; + case '!': + rule->rflags |= FILTRULE_CLEAR_LIST; + break; + default: + rprintf(FERROR, "Unknown filter rule: `%s'\n", *rulestr_ptr); + exit_cleanup(RERR_SYNTAX); + } + while (ch != '!' && *++s && *s != ' ' && *s != '_') { + if (template->rflags & FILTRULE_WORD_SPLIT && isspace(*s)) { + s--; + break; + } + switch (*s) { + default: + invalid: + rprintf(FERROR, + "invalid modifier '%c' at position %d in filter rule: %s\n", + *s, (int)(s - (const uchar *)*rulestr_ptr), *rulestr_ptr); + exit_cleanup(RERR_SYNTAX); + case '-': + if (!BITS_SETnUNSET(rule->rflags, FILTRULE_MERGE_FILE, FILTRULE_NO_PREFIXES)) + goto invalid; + rule->rflags |= FILTRULE_NO_PREFIXES; + break; + case '+': + if (!BITS_SETnUNSET(rule->rflags, FILTRULE_MERGE_FILE, FILTRULE_NO_PREFIXES)) + goto invalid; + rule->rflags |= FILTRULE_NO_PREFIXES + | FILTRULE_INCLUDE; + break; + case '/': + rule->rflags |= FILTRULE_ABS_PATH; + break; + case '!': + /* Negation really goes with the pattern, so it + * isn't useful as a merge-file default. */ + if (rule->rflags & FILTRULE_MERGE_FILE) + goto invalid; + rule->rflags |= FILTRULE_NEGATE; + break; + case 'C': + if (rule->rflags & FILTRULE_NO_PREFIXES || prefix_specifies_side) + goto invalid; + rule->rflags |= FILTRULE_NO_PREFIXES + | FILTRULE_WORD_SPLIT + | FILTRULE_NO_INHERIT + | FILTRULE_CVS_IGNORE; + break; + case 'e': + if (!(rule->rflags & FILTRULE_MERGE_FILE)) + goto invalid; + rule->rflags |= FILTRULE_EXCLUDE_SELF; + break; + case 'n': + if (!(rule->rflags & FILTRULE_MERGE_FILE)) + goto invalid; + rule->rflags |= FILTRULE_NO_INHERIT; + break; + case 'p': + rule->rflags |= FILTRULE_PERISHABLE; + break; + case 'r': + if (prefix_specifies_side) + goto invalid; + rule->rflags |= FILTRULE_RECEIVER_SIDE; + break; + case 's': + if (prefix_specifies_side) + goto invalid; + rule->rflags |= FILTRULE_SENDER_SIDE; + break; + case 'w': + if (!(rule->rflags & FILTRULE_MERGE_FILE)) + goto invalid; + rule->rflags |= FILTRULE_WORD_SPLIT; + break; + case 'x': + rule->rflags |= FILTRULE_XATTR; + saw_xattr_filter = 1; + break; + } + } + if (*s) + s++; + } + if (template->rflags & FILTRULES_SIDES) { + if (rule->rflags & FILTRULES_SIDES) { + /* The filter and template both specify side(s). This + * is dodgy (and won't work correctly if the template is + * a one-sided per-dir merge rule), so reject it. */ + rprintf(FERROR, + "specified-side merge file contains specified-side filter: %s\n", + *rulestr_ptr); + exit_cleanup(RERR_SYNTAX); + } + rule->rflags |= template->rflags & FILTRULES_SIDES; + } + + if (template->rflags & FILTRULE_WORD_SPLIT) { + const uchar *cp = s; + /* Token ends at whitespace or the end of the string. */ + while (!isspace(*cp) && *cp != '\0') + cp++; + len = cp - s; + } else + len = strlen((char*)s); + + if (rule->rflags & FILTRULE_CLEAR_LIST) { + if (!(rule->rflags & FILTRULE_NO_PREFIXES) + && !(xflags & XFLG_OLD_PREFIXES) && len) { + rprintf(FERROR, + "'!' rule has trailing characters: %s\n", *rulestr_ptr); + exit_cleanup(RERR_SYNTAX); + } + if (len > 1) + rule->rflags &= ~FILTRULE_CLEAR_LIST; + } else if (!len && !(rule->rflags & FILTRULE_CVS_IGNORE)) { + rprintf(FERROR, "unexpected end of filter rule: %s\n", *rulestr_ptr); + exit_cleanup(RERR_SYNTAX); + } + + /* --delete-excluded turns an un-modified include/exclude into a sender-side rule. */ + if (delete_excluded + && !(rule->rflags & (FILTRULES_SIDES|FILTRULE_MERGE_FILE|FILTRULE_PERDIR_MERGE))) + rule->rflags |= FILTRULE_SENDER_SIDE; + + *pat_ptr = (const char *)s; + *pat_len_ptr = len; + *rulestr_ptr = *pat_ptr + len; + return rule; +} + +static void get_cvs_excludes(uint32 rflags) +{ + static int initialized = 0; + char *p, fname[MAXPATHLEN]; + + if (initialized) + return; + initialized = 1; + + parse_filter_str(&cvs_filter_list, default_cvsignore(), + rule_template(rflags | (protocol_version >= 30 ? FILTRULE_PERISHABLE : 0)), + 0); + + p = module_id >= 0 && lp_use_chroot(module_id) ? "/" : getenv("HOME"); + if (p && pathjoin(fname, MAXPATHLEN, p, ".cvsignore") < MAXPATHLEN) + parse_filter_file(&cvs_filter_list, fname, rule_template(rflags), 0); + + parse_filter_str(&cvs_filter_list, getenv("CVSIGNORE"), rule_template(rflags), 0); +} + +const filter_rule *rule_template(uint32 rflags) +{ + static filter_rule template; /* zero-initialized */ + template.rflags = rflags; + return &template; +} + +void parse_filter_str(filter_rule_list *listp, const char *rulestr, + const filter_rule *template, int xflags) +{ + filter_rule *rule; + const char *pat; + unsigned int pat_len; + + if (!rulestr) + return; + + while (1) { + uint32 new_rflags; + + /* Remember that the returned string is NOT '\0' terminated! */ + if (!(rule = parse_rule_tok(&rulestr, template, xflags, &pat, &pat_len))) + break; + + if (pat_len >= MAXPATHLEN) { + rprintf(FERROR, "discarding over-long filter: %.*s\n", + (int)pat_len, pat); + free_continue: + free_filter(rule); + continue; + } + + new_rflags = rule->rflags; + if (new_rflags & FILTRULE_CLEAR_LIST) { + if (DEBUG_GTE(FILTER, 2)) { + rprintf(FINFO, + "[%s] clearing filter list%s\n", + who_am_i(), listp->debug_type); + } + pop_filter_list(listp); + listp->head = NULL; + goto free_continue; + } + + if (new_rflags & FILTRULE_MERGE_FILE) { + if (!pat_len) { + pat = ".cvsignore"; + pat_len = 10; + } + if (new_rflags & FILTRULE_EXCLUDE_SELF) { + const char *name; + filter_rule *excl_self; + + excl_self = new0(filter_rule); + /* Find the beginning of the basename and add an exclude for it. */ + for (name = pat + pat_len; name > pat && name[-1] != '/'; name--) {} + add_rule(listp, name, (pat + pat_len) - name, excl_self, 0); + rule->rflags &= ~FILTRULE_EXCLUDE_SELF; + } + if (new_rflags & FILTRULE_PERDIR_MERGE) { + if (parent_dirscan) { + const char *p; + unsigned int len = pat_len; + if ((p = parse_merge_name(pat, &len, module_dirlen))) + add_rule(listp, p, len, rule, 0); + else + free_filter(rule); + continue; + } + } else { + const char *p; + unsigned int len = pat_len; + if ((p = parse_merge_name(pat, &len, 0))) + parse_filter_file(listp, p, rule, XFLG_FATAL_ERRORS); + free_filter(rule); + continue; + } + } + + add_rule(listp, pat, pat_len, rule, xflags); + + if (new_rflags & FILTRULE_CVS_IGNORE + && !(new_rflags & FILTRULE_MERGE_FILE)) + get_cvs_excludes(new_rflags); + } +} + +void parse_filter_file(filter_rule_list *listp, const char *fname, const filter_rule *template, int xflags) +{ + FILE *fp; + char line[BIGPATHBUFLEN]; + char *eob = line + sizeof line - 1; + BOOL word_split = (template->rflags & FILTRULE_WORD_SPLIT) != 0; + + if (!fname || !*fname) + return; + + if (*fname != '-' || fname[1] || am_server) { + if (daemon_filter_list.head) { + strlcpy(line, fname, sizeof line); + clean_fname(line, CFN_COLLAPSE_DOT_DOT_DIRS); + if (check_filter(&daemon_filter_list, FLOG, line, 0) < 0) + fp = NULL; + else + fp = fopen(line, "rb"); + } else + fp = fopen(fname, "rb"); + } else + fp = stdin; + + if (DEBUG_GTE(FILTER, 2)) { + rprintf(FINFO, "[%s] parse_filter_file(%s,%x,%x)%s\n", + who_am_i(), fname, template->rflags, xflags, + fp ? "" : " [not found]"); + } + + if (!fp) { + if (xflags & XFLG_FATAL_ERRORS) { + rsyserr(FERROR, errno, + "failed to open %sclude file %s", + template->rflags & FILTRULE_INCLUDE ? "in" : "ex", + fname); + exit_cleanup(RERR_FILEIO); + } + return; + } + dirbuf[dirbuf_len] = '\0'; + + while (1) { + char *s = line; + int ch, overflow = 0; + while (1) { + if ((ch = getc(fp)) == EOF) { + if (ferror(fp) && errno == EINTR) { + clearerr(fp); + continue; + } + break; + } + if (word_split && isspace(ch)) + break; + if (eol_nulls? !ch : (ch == '\n' || ch == '\r')) + break; + if (s < eob) + *s++ = ch; + else + overflow = 1; + } + if (overflow) { + rprintf(FERROR, "discarding over-long filter: %s...\n", line); + s = line; + } + *s = '\0'; + /* Skip an empty token and (when line parsing) comments. */ + if (*line && (word_split || (*line != ';' && *line != '#'))) + parse_filter_str(listp, line, template, xflags); + if (ch == EOF) + break; + } + fclose(fp); +} + +/* If the "for_xfer" flag is set, the prefix is made compatible with the + * current protocol_version (if possible) or a NULL is returned (if not + * possible). */ +char *get_rule_prefix(filter_rule *rule, const char *pat, int for_xfer, + unsigned int *plen_ptr) +{ + static char buf[MAX_RULE_PREFIX+1]; + char *op = buf; + int legal_len = for_xfer && protocol_version < 29 ? 1 : MAX_RULE_PREFIX-1; + + if (rule->rflags & FILTRULE_PERDIR_MERGE) { + if (legal_len == 1) + return NULL; + *op++ = ':'; + } else if (rule->rflags & FILTRULE_INCLUDE) + *op++ = '+'; + else if (legal_len != 1 + || ((*pat == '-' || *pat == '+') && pat[1] == ' ')) + *op++ = '-'; + else + legal_len = 0; + + if (rule->rflags & FILTRULE_ABS_PATH) + *op++ = '/'; + if (rule->rflags & FILTRULE_NEGATE) + *op++ = '!'; + if (rule->rflags & FILTRULE_CVS_IGNORE) + *op++ = 'C'; + else { + if (rule->rflags & FILTRULE_NO_INHERIT) + *op++ = 'n'; + if (rule->rflags & FILTRULE_WORD_SPLIT) + *op++ = 'w'; + if (rule->rflags & FILTRULE_NO_PREFIXES) { + if (rule->rflags & FILTRULE_INCLUDE) + *op++ = '+'; + else + *op++ = '-'; + } + } + if (rule->rflags & FILTRULE_EXCLUDE_SELF) + *op++ = 'e'; + if (rule->rflags & FILTRULE_XATTR) + *op++ = 'x'; + if (rule->rflags & FILTRULE_SENDER_SIDE + && (!for_xfer || protocol_version >= 29)) + *op++ = 's'; + if (rule->rflags & FILTRULE_RECEIVER_SIDE + && (!for_xfer || protocol_version >= 29 + || (delete_excluded && am_sender))) + *op++ = 'r'; + if (rule->rflags & FILTRULE_PERISHABLE) { + if (!for_xfer || protocol_version >= 30) + *op++ = 'p'; + else if (am_sender) + return NULL; + } + if (op - buf > legal_len) + return NULL; + if (legal_len) + *op++ = ' '; + *op = '\0'; + if (plen_ptr) + *plen_ptr = op - buf; + return buf; +} + +static void send_rules(int f_out, filter_rule_list *flp) +{ + filter_rule *ent; + + for (ent = flp->head; ent; ent = ent->next) { + unsigned int len, plen, dlen; + int elide = 0; + char *p; + + /* Note we need to check delete_excluded here in addition to + * the code in parse_rule_tok() because some rules may have + * been added before we found the --delete-excluded option. + * We must also elide any CVS merge-file rules to avoid a + * backward compatibility problem, and we elide any no-prefix + * merge files as an optimization (since they can only have + * include/exclude rules). */ + if (ent->rflags & FILTRULE_SENDER_SIDE) + elide = am_sender ? LOCAL_RULE : REMOTE_RULE; + if (ent->rflags & FILTRULE_RECEIVER_SIDE) + elide = elide ? 0 : am_sender ? REMOTE_RULE : LOCAL_RULE; + else if (delete_excluded && !elide + && (!(ent->rflags & FILTRULE_PERDIR_MERGE) + || ent->rflags & FILTRULE_NO_PREFIXES)) + elide = am_sender ? LOCAL_RULE : REMOTE_RULE; + ent->elide = elide; + if (elide == LOCAL_RULE) + continue; + if (ent->rflags & FILTRULE_CVS_IGNORE + && !(ent->rflags & FILTRULE_MERGE_FILE)) { + int f = am_sender || protocol_version < 29 ? f_out : -2; + send_rules(f, &cvs_filter_list); + if (f == f_out) + continue; + } + p = get_rule_prefix(ent, ent->pattern, 1, &plen); + if (!p) { + rprintf(FERROR, + "filter rules are too modern for remote rsync.\n"); + exit_cleanup(RERR_PROTOCOL); + } + if (f_out < 0) + continue; + len = strlen(ent->pattern); + dlen = ent->rflags & FILTRULE_DIRECTORY ? 1 : 0; + if (!(plen + len + dlen)) + continue; + write_int(f_out, plen + len + dlen); + if (plen) + write_buf(f_out, p, plen); + write_buf(f_out, ent->pattern, len); + if (dlen) + write_byte(f_out, '/'); + } +} + +/* This is only called by the client. */ +void send_filter_list(int f_out) +{ + int receiver_wants_list = prune_empty_dirs + || (delete_mode && (!delete_excluded || protocol_version >= 29)); + + if (local_server || (am_sender && !receiver_wants_list)) + f_out = -1; + if (cvs_exclude && am_sender) { + if (protocol_version >= 29) + parse_filter_str(&filter_list, ":C", rule_template(0), 0); + parse_filter_str(&filter_list, "-C", rule_template(0), 0); + } + + send_rules(f_out, &filter_list); + + if (f_out >= 0) + write_int(f_out, 0); + + if (cvs_exclude) { + if (!am_sender || protocol_version < 29) + parse_filter_str(&filter_list, ":C", rule_template(0), 0); + if (!am_sender) + parse_filter_str(&filter_list, "-C", rule_template(0), 0); + } +} + +/* This is only called by the server. */ +void recv_filter_list(int f_in) +{ + char line[BIGPATHBUFLEN]; + int xflags = protocol_version >= 29 ? 0 : XFLG_OLD_PREFIXES; + int receiver_wants_list = prune_empty_dirs + || (delete_mode && (!delete_excluded || protocol_version >= 29)); + unsigned int len; + + if (!local_server && (am_sender || receiver_wants_list)) { + while ((len = read_int(f_in)) != 0) { + if (len >= sizeof line) + overflow_exit("recv_rules"); + read_sbuf(f_in, line, len); + parse_filter_str(&filter_list, line, rule_template(0), xflags); + } + } + + if (cvs_exclude) { + if (local_server || am_sender || protocol_version < 29) + parse_filter_str(&filter_list, ":C", rule_template(0), 0); + if (local_server || am_sender) + parse_filter_str(&filter_list, "-C", rule_template(0), 0); + } + + if (local_server) /* filter out any rules that aren't for us. */ + send_rules(-1, &filter_list); +} |