Make man page clearer with read-only option

Merge of master-melb:xfs-cmds:29253a by kenmcd.

  Make man page clearer with read-only option and immutable files

diff --git a/man/man8/xfs_io.8 b/man/man8/xfs_io.8
index bcdfb7c8f6432b756b569007a840ec6780446823..23bef94519cdb9cbd4c851dd3a46177b35cd57f0 100644 (file)
--- a/man/man8/xfs_io.8
+++ b/man/man8/xfs_io.8
@@ -51,7 +51,9 @@ if it does not already exist.
 .B \-r
 Open
 .I file
-read-only, initially.
+read-only, initially. This is required if
+.I file
+is immutable or append-only.
 .TP
 .B \-x
 Expert mode. Dangerous commands are only available in this mode.