1 files changed, 281 insertions, 0 deletions
diff --git a/contrib/libarchive/libarchive_fe/matching.c b/contrib/libarchive/libarchive_fe/matching.c
new file mode 100644
index 000000000000..5a4834c190d3
--- /dev/null
+++ b/contrib/libarchive/libarchive_fe/matching.c
@@ -0,0 +1,281 @@
+/*-
+ * Copyright (c) 2003-2007 Tim Kientzle
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "lafe_platform.h"
+__FBSDID("$FreeBSD$");
+
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+#include "err.h"
+#include "line_reader.h"
+#include "matching.h"
+#include "pathmatch.h"
+
+struct match {
+	struct match	 *next;
+	int		  matches;
+	char		  pattern[1];
+};
+
+struct lafe_matching {
+	struct match	 *exclusions;
+	int		  exclusions_count;
+	struct match	 *inclusions;
+	int		  inclusions_count;
+	int		  inclusions_unmatched_count;
+};
+
+static void	add_pattern(struct match **list, const char *pattern);
+static void	initialize_matching(struct lafe_matching **);
+static int	match_exclusion(struct match *, const char *pathname);
+static int	match_inclusion(struct match *, const char *pathname);
+
+/*
+ * The matching logic here needs to be re-thought.  I started out to
+ * try to mimic gtar's matching logic, but it's not entirely
+ * consistent.  In particular 'tar -t' and 'tar -x' interpret patterns
+ * on the command line as anchored, but --exclude doesn't.
+ */
+
+/*
+ * Utility functions to manage exclusion/inclusion patterns
+ */
+
+int
+lafe_exclude(struct lafe_matching **matching, const char *pattern)
+{
+
+	if (*matching == NULL)
+		initialize_matching(matching);
+	add_pattern(&((*matching)->exclusions), pattern);
+	(*matching)->exclusions_count++;
+	return (0);
+}
+
+int
+lafe_exclude_from_file(struct lafe_matching **matching, const char *pathname)
+{
+	struct lafe_line_reader *lr;
+	const char *p;
+	int ret = 0;
+
+	lr = lafe_line_reader(pathname, 0);
+	while ((p = lafe_line_reader_next(lr)) != NULL) {
+		if (lafe_exclude(matching, p) != 0)
+			ret = -1;
+	}
+	lafe_line_reader_free(lr);
+	return (ret);
+}
+
+int
+lafe_include(struct lafe_matching **matching, const char *pattern)
+{
+
+	if (*matching == NULL)
+		initialize_matching(matching);
+	add_pattern(&((*matching)->inclusions), pattern);
+	(*matching)->inclusions_count++;
+	(*matching)->inclusions_unmatched_count++;
+	return (0);
+}
+
+int
+lafe_include_from_file(struct lafe_matching **matching, const char *pathname,
+    int nullSeparator)
+{
+	struct lafe_line_reader *lr;
+	const char *p;
+	int ret = 0;
+
+	lr = lafe_line_reader(pathname, nullSeparator);
+	while ((p = lafe_line_reader_next(lr)) != NULL) {
+		if (lafe_include(matching, p) != 0)
+			ret = -1;
+	}
+	lafe_line_reader_free(lr);
+	return (ret);
+}
+
+static void
+add_pattern(struct match **list, const char *pattern)
+{
+	struct match *match;
+	size_t len;
+
+	len = strlen(pattern);
+	match = malloc(sizeof(*match) + len + 1);
+	if (match == NULL)
+		lafe_errc(1, errno, "Out of memory");
+	strcpy(match->pattern, pattern);
+	/* Both "foo/" and "foo" should match "foo/bar". */
+	if (len && match->pattern[len - 1] == '/')
+		match->pattern[len - 1] = '\0';
+	match->next = *list;
+	*list = match;
+	match->matches = 0;
+}
+
+
+int
+lafe_excluded(struct lafe_matching *matching, const char *pathname)
+{
+	struct match *match;
+	struct match *matched;
+
+	if (matching == NULL)
+		return (0);
+
+	/* Mark off any unmatched inclusions. */
+	/* In particular, if a filename does appear in the archive and
+	 * is explicitly included and excluded, then we don't report
+	 * it as missing even though we don't extract it.
+	 */
+	matched = NULL;
+	for (match = matching->inclusions; match != NULL; match = match->next){
+		if (match->matches == 0
+		    && match_inclusion(match, pathname)) {
+			matching->inclusions_unmatched_count--;
+			match->matches++;
+			matched = match;
+		}
+	}
+
+	/* Exclusions take priority */
+	for (match = matching->exclusions; match != NULL; match = match->next){
+		if (match_exclusion(match, pathname))
+			return (1);
+	}
+
+	/* It's not excluded and we found an inclusion above, so it's included. */
+	if (matched != NULL)
+		return (0);
+
+
+	/* We didn't find an unmatched inclusion, check the remaining ones. */
+	for (match = matching->inclusions; match != NULL; match = match->next){
+		/* We looked at previously-unmatched inclusions already. */
+		if (match->matches > 0
+		    && match_inclusion(match, pathname)) {
+			match->matches++;
+			return (0);
+		}
+	}
+
+	/* If there were inclusions, default is to exclude. */
+	if (matching->inclusions != NULL)
+	    return (1);
+
+	/* No explicit inclusions, default is to match. */
+	return (0);
+}
+
+/*
+ * This is a little odd, but it matches the default behavior of
+ * gtar.  In particular, 'a*b' will match 'foo/a1111/222b/bar'
+ *
+ */
+static int
+match_exclusion(struct match *match, const char *pathname)
+{
+	return (lafe_pathmatch(match->pattern,
+		    pathname,
+		    PATHMATCH_NO_ANCHOR_START | PATHMATCH_NO_ANCHOR_END));
+}
+
+/*
+ * Again, mimic gtar:  inclusions are always anchored (have to match
+ * the beginning of the path) even though exclusions are not anchored.
+ */
+static int
+match_inclusion(struct match *match, const char *pathname)
+{
+	return (lafe_pathmatch(match->pattern, pathname, PATHMATCH_NO_ANCHOR_END));
+}
+
+void
+lafe_cleanup_exclusions(struct lafe_matching **matching)
+{
+	struct match *p, *q;
+
+	if (*matching == NULL)
+		return;
+
+	for (p = (*matching)->inclusions; p != NULL; ) {
+		q = p;
+		p = p->next;
+		free(q);
+	}
+
+	for (p = (*matching)->exclusions; p != NULL; ) {
+		q = p;
+		p = p->next;
+		free(q);
+	}
+
+	free(*matching);
+	*matching = NULL;
+}
+
+static void
+initialize_matching(struct lafe_matching **matching)
+{
+	*matching = calloc(sizeof(**matching), 1);
+	if (*matching == NULL)
+		lafe_errc(1, errno, "No memory");
+}
+
+int
+lafe_unmatched_inclusions(struct lafe_matching *matching)
+{
+
+	if (matching == NULL)
+		return (0);
+	return (matching->inclusions_unmatched_count);
+}
+
+int
+lafe_unmatched_inclusions_warn(struct lafe_matching *matching, const char *msg)
+{
+	struct match *p;
+
+	if (matching == NULL)
+		return (0);
+
+	for (p = matching->inclusions; p != NULL; p = p->next) {
+		if (p->matches == 0)
+			lafe_warnc(0, "%s: %s", p->pattern, msg);
+	}
+
+	return (matching->inclusions_unmatched_count);
+}