svn commit: r240788 - projects/mtree/contrib/mtree

[Brooks Davis]

Author: brooks
Date: Fri Sep 21 19:30:36 2012
New Revision: 240788
URL: http://svn.freebsd.org/changeset/base/240788

Log:
  Document -f spec1 -f spec2.

Modified:
  projects/mtree/contrib/mtree/mtree.8

Modified: projects/mtree/contrib/mtree/mtree.8
==============================================================================
--- projects/mtree/contrib/mtree/mtree.8	Fri Sep 21 19:27:13 2012	(r240787)
+++ projects/mtree/contrib/mtree/mtree.8	Fri Sep 21 19:30:36 2012	(r240788)
@@ -143,6 +143,18 @@ specification.
 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 will 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
+specifica
+tion.
 .It Fl I Ar tags
 Add the comma separated tags to the
 .Dq inclusion