POSIX.1e-style Extended Attribute support

This commit implements storing/reading POSIX.1e-style extended
attribute information in "pax" format archives.  An outline of the
storage format is in the tar.5 manpage.  The archive_read_extract()
function has code to restore those archives to disk for Linux; FreeBSD
implementation is forthcoming.

Many thanks to Jaakko Heinonen for finding flaws in earlier
proposals and doing the bulk of the coding in this work.

1 files changed, 19 insertions, 0 deletions

diff --git a/lib/libarchive/archive_entry.h b/lib/libarchive/archive_entry.h
index a35f0dfae58b..3c3f73dfbc8d 100644
--- a/lib/libarchive/archive_entry.h
+++ b/lib/libarchive/archive_entry.h
@@ -229,4 +229,23 @@ int		 __archive_entry_acl_parse_w(struct archive_entry *,
 }
 #endif
 
+/*
+ * extended attributes
+ */
+
+void	 archive_entry_xattr_clear(struct archive_entry *);
+void	 archive_entry_xattr_add_entry(struct archive_entry *,
+	     const char *name, const void *value, size_t size);
+
+/*
+ * To retrieve the xattr list, first "reset", then repeatedly ask for the
+ * "next" entry.
+ */
+
+int	archive_entry_xattr_count(struct archive_entry *);
+int	archive_entry_xattr_reset(struct archive_entry *);
+int	archive_entry_xattr_next(struct archive_entry *,
+	     const char **name, const void **value, size_t *);
+
+
 #endif /* !ARCHIVE_ENTRY_H_INCLUDED */