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-rw-r--r--usr.sbin/mtree/mtree.813
1 files changed, 13 insertions, 0 deletions
diff --git a/usr.sbin/mtree/mtree.8 b/usr.sbin/mtree/mtree.8
index e083b2c..b2cf37d 100644
--- a/usr.sbin/mtree/mtree.8
+++ b/usr.sbin/mtree/mtree.8
@@ -45,6 +45,9 @@
.Op Fl f Ar spec
.Ek
.Bk -words
+.Op Fl f Ar spec
+.Ek
+.Bk -words
.Op Fl K Ar keywords
.Ek
.Bk -words
@@ -122,6 +125,16 @@ Don't descend below mount points in the file hierarchy.
Read the specification from
.Ar file ,
instead of from the standard input.
+.Pp
+If this option is specified twice, the two specifications are compared
+to each other rather than to the file hierarchy.
+The specifications be sorted like output generated using
+.Fl c .
+The output format in this case is somewhat remniscent of
+.Xr comm 1 ,
+having "in first spec only", "in second spec only", and "different"
+columns, prefixed by zero, one and two TAB characters respectively.
+Each entry in the "different" column occupies two lines, one from each specfication.
.It Fl K Ar keywords
Add the specified (whitespace or comma separated)
.Ar keywords
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