260 lines
6.3 KiB
C
260 lines
6.3 KiB
C
/*-
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* Copyright (c) 2003-2007 Tim Kientzle
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "cpio_platform.h"
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__FBSDID("$FreeBSD$");
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include "matching.h"
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#include "pathmatch.h"
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struct match {
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struct match *next;
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int matches;
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char pattern[1];
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};
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struct matching {
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struct match *exclusions;
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int exclusions_count;
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struct match *inclusions;
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int inclusions_count;
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int inclusions_unmatched_count;
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};
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static void add_pattern(struct match **list, const char *pattern);
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static void initialize_matching(struct cpio *);
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static int match_exclusion(struct match *, const char *pathname);
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static int match_inclusion(struct match *, const char *pathname);
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/*
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* The matching logic here needs to be re-thought. I started out to
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* try to mimic gtar's matching logic, but it's not entirely
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* consistent. In particular 'tar -t' and 'tar -x' interpret patterns
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* on the command line as anchored, but --exclude doesn't.
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*/
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/*
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* Utility functions to manage exclusion/inclusion patterns
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*/
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int
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exclude(struct cpio *cpio, const char *pattern)
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{
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struct matching *matching;
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if (cpio->matching == NULL)
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initialize_matching(cpio);
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matching = cpio->matching;
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add_pattern(&(matching->exclusions), pattern);
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matching->exclusions_count++;
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return (0);
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}
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#if 0
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int
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exclude_from_file(struct cpio *cpio, const char *pathname)
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{
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return (process_lines(cpio, pathname, &exclude));
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}
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#endif
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int
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include(struct cpio *cpio, const char *pattern)
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{
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struct matching *matching;
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if (cpio->matching == NULL)
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initialize_matching(cpio);
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matching = cpio->matching;
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add_pattern(&(matching->inclusions), pattern);
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matching->inclusions_count++;
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matching->inclusions_unmatched_count++;
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return (0);
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}
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int
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include_from_file(struct cpio *cpio, const char *pathname)
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{
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struct line_reader *lr;
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const char *p;
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int ret = 0;
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lr = process_lines_init(pathname, '\n');
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while ((p = process_lines_next(lr)) != NULL)
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if (include(cpio, p) != 0)
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ret = -1;
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process_lines_free(lr);
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return (ret);
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}
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static void
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add_pattern(struct match **list, const char *pattern)
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{
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struct match *match;
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match = malloc(sizeof(*match) + strlen(pattern) + 1);
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if (match == NULL)
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cpio_errc(1, errno, "Out of memory");
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if (pattern[0] == '/')
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pattern++;
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strcpy(match->pattern, pattern);
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/* Both "foo/" and "foo" should match "foo/bar". */
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if (match->pattern[strlen(match->pattern)-1] == '/')
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match->pattern[strlen(match->pattern)-1] = '\0';
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match->next = *list;
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*list = match;
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match->matches = 0;
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}
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int
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excluded(struct cpio *cpio, const char *pathname)
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{
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struct matching *matching;
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struct match *match;
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struct match *matched;
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matching = cpio->matching;
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if (matching == NULL)
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return (0);
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/* Exclusions take priority */
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for (match = matching->exclusions; match != NULL; match = match->next){
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if (match_exclusion(match, pathname))
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return (1);
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}
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/* Then check for inclusions */
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matched = NULL;
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for (match = matching->inclusions; match != NULL; match = match->next){
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if (match_inclusion(match, pathname)) {
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/*
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* If this pattern has never been matched,
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* then we're done.
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*/
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if (match->matches == 0) {
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match->matches++;
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matching->inclusions_unmatched_count++;
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return (0);
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}
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/*
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* Otherwise, remember the match but keep checking
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* in case we can tick off an unmatched pattern.
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*/
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matched = match;
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}
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}
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/*
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* We didn't find a pattern that had never been matched, but
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* we did find a match, so count it and exit.
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*/
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if (matched != NULL) {
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matched->matches++;
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return (0);
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}
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/* If there were inclusions, default is to exclude. */
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if (matching->inclusions != NULL)
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return (1);
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/* No explicit inclusions, default is to match. */
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return (0);
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}
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/*
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* This is a little odd, but it matches the default behavior of
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* gtar. In particular, 'a*b' will match 'foo/a1111/222b/bar'
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*
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*/
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int
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match_exclusion(struct match *match, const char *pathname)
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{
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return (pathmatch(match->pattern,
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pathname,
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PATHMATCH_NO_ANCHOR_START | PATHMATCH_NO_ANCHOR_END));
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}
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/*
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* Again, mimic gtar: inclusions are always anchored (have to match
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* the beginning of the path) even though exclusions are not anchored.
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*/
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int
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match_inclusion(struct match *match, const char *pathname)
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{
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return (pathmatch(match->pattern, pathname, 0));
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}
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void
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cleanup_exclusions(struct cpio *cpio)
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{
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struct match *p, *q;
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if (cpio->matching) {
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p = cpio->matching->inclusions;
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while (p != NULL) {
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q = p;
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p = p->next;
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free(q);
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}
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p = cpio->matching->exclusions;
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while (p != NULL) {
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q = p;
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p = p->next;
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free(q);
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}
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free(cpio->matching);
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}
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}
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static void
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initialize_matching(struct cpio *cpio)
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{
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cpio->matching = malloc(sizeof(*cpio->matching));
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if (cpio->matching == NULL)
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cpio_errc(1, errno, "No memory");
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memset(cpio->matching, 0, sizeof(*cpio->matching));
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}
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int
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unmatched_inclusions(struct cpio *cpio)
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{
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struct matching *matching;
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matching = cpio->matching;
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if (matching == NULL)
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return (0);
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return (matching->inclusions_unmatched_count);
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}
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