tar: revert older fix (non-portable), added new one.

testsuite tar-extracts-all-subdirs now passes.

archival/libunarchive/filter_accept_reject_list.c

@@ -14,14 +14,14 @@
 char filter_accept_reject_list(archive_handle_t *archive_handle)
 {
 	const char *key = archive_handle->file_header->name;
-	const llist_t *reject_entry = find_list_entry(archive_handle->reject, key);
+	const llist_t *reject_entry = find_list_entry2(archive_handle->reject, key);
 	const llist_t *accept_entry;
 
 	/* If the key is in a reject list fail */
 	if (reject_entry) {
 		return(EXIT_FAILURE);
 	}
-	accept_entry = find_list_entry(archive_handle->accept, key);
+	accept_entry = find_list_entry2(archive_handle->accept, key);
 
 	/* Fail if an accept list was specified and the key wasnt in there */
 	if ((accept_entry == NULL) && archive_handle->accept) {

archival/libunarchive/find_list_entry.c

@@ -9,14 +9,46 @@
 #include <stdlib.h>
 #include "unarchive.h"
 
-/* Find a string in a list */
+/* Find a string in a shell pattern list */
 const llist_t *find_list_entry(const llist_t *list, const char *filename)
 {
 	while (list) {
-		if (fnmatch(list->data, filename, FNM_LEADING_DIR) == 0) {
+		if (fnmatch(list->data, filename, 0) == 0) {
-			return (list);
+			return list;
 		}
 		list = list->link;
 	}
-	return(NULL);
+	return NULL;
+}
+
+/* Same, but compares only path components present in pattern
+ * (extra trailing path components in filename are assumed to match)
+ */
+const llist_t *find_list_entry2(const llist_t *list, const char *filename)
+{
+	char buf[PATH_MAX];
+	int pattern_slash_cnt;
+	const char *c;
+	char *d;
+
+	while (list) {
+		c = list->data;
+		pattern_slash_cnt = 0;
+		while (*c)
+			if (*c++ == '/') pattern_slash_cnt++;
+		c = filename;
+		d = buf;
+		/* paranoia is better that buffer overflows */
+		while (*c && d != buf + sizeof(buf)-1) {
+			if (*c == '/' && --pattern_slash_cnt < 0)
+				break;
+			*d++ = *c++;
+		}
+		*d = '\0';
+		if (fnmatch(list->data, buf, 0) == 0) {
+			return list;
+		}
+		list = list->link;
+	}
+	return NULL;
 }

archival/tar.c

@@ -545,8 +545,12 @@ static llist_t *append_file_list_to_list(llist_t *list)
 		tmp = cur;
 		cur = cur->link;
 		free(tmp);
-		while ((line = bb_get_chomped_line_from_file(src_stream)) != NULL)
+		while ((line = bb_get_chomped_line_from_file(src_stream)) != NULL) {
+				char *filename_ptr = last_char_is(line, '/');
+				if (filename_ptr > line)
+					*filename_ptr = '\0';
 				llist_add_to(&newlist, line);
+		}
 		fclose(src_stream);
 	}
 	return newlist;

include/unarchive.h

@@ -98,6 +98,7 @@ extern ssize_t archive_xread_all_eof(archive_handle_t *archive_handle, unsigned
 
 extern void data_align(archive_handle_t *archive_handle, const unsigned short boundary);
 extern const llist_t *find_list_entry(const llist_t *list, const char *filename);
+extern const llist_t *find_list_entry2(const llist_t *list, const char *filename);
 
 extern int uncompressStream(int src_fd, int dst_fd);
 extern void inflate_init(unsigned int bufsize);