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From: Brooks Davis <brooks@FreeBSD.org>
Date: Thu, 6 Apr 2017 23:35:11 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r316593 - head/usr.sbin/makefs
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Author: brooks
Date: Thu Apr  6 23:35:10 2017
New Revision: 316593
URL: https://svnweb.freebsd.org/changeset/base/316593

Log:
  Point out that -F probably does not do what the user expects.
  
  Users attempting to create images from mtree METALOG files created by
  installworld often use -F when they should be passing the METALOG file
  in place of a directory. This is often produces difficult to debug
  error reports.
  
  Reviewed by:	emaste
  MFC after:	1 week
  Sponsored by:	DARPA, AFRL
  Differential Revision:	https://reviews.freebsd.org/D10038

Modified:
  head/usr.sbin/makefs/makefs.8

Modified: head/usr.sbin/makefs/makefs.8
==============================================================================
--- head/usr.sbin/makefs/makefs.8	Thu Apr  6 22:50:28 2017	(r316592)
+++ head/usr.sbin/makefs/makefs.8	Thu Apr  6 23:35:10 2017	(r316593)
@@ -35,7 +35,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd June 14, 2016
+.Dd April 6, 2017
 .Dt MAKEFS 8
 .Os
 .Sh NAME
@@ -116,6 +116,12 @@ set in
 .Ar debug-mask .
 XXX: document these
 .It Fl F Ar mtree-specfile
+.Em This is almost certainly not the option you are looking for.
+To create an image from a list of files in an mtree format manifest,
+specify it as the last argument on the commandline, not as a the
+argument to
+.Fl F .
+.Pp
 Use
 .Ar mtree-specfile
 as an