1 files changed, 22 insertions, 0 deletions

diff --git a/sha1sum.1 b/sha1sum.1
index f54dbe7..7bf7c3a 100644
--- a/sha1sum.1
+++ b/sha1sum.1
@@ -98,6 +98,28 @@ option is used.
 .B no-recursive
 The utility shall traverse directories.
 (This is the default behaviour).
+.TP
+.B xdev
+Implies
+.B -W recursive
+but also allows the recursion across mountpoints.
+.TP
+.B no-xdev
+Disable recursion across mountpoints.
+(This is the default behaviour).
+Note that this does not disable
+recursion by itself.
+.TP
+.B xlink
+Implies
+.B -W recursive
+but also allows the recursion across symbolic links.
+.TP
+.B no-xlink
+Disable recursion across symbolic links.
+(This is the default behaviour).
+Note that this does not disable
+recursion by itself.
 .RE
 .TP
 .B -w