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From: Warner Losh <imp@FreeBSD.org>
Date: Sun, 3 Jan 2016 19:18:48 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r293115 - head/etc
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Author: imp
Date: Sun Jan  3 19:18:48 2016
New Revision: 293115
URL: https://svnweb.freebsd.org/changeset/base/293115

Log:
  Use /bin/rm to remove /firstboot*. Otherwise rm -i alias is picked
  up and can cause issues on boot with the prompts. Fix the read-only
  root case with horrible kludge of mounting rw removing the files, then
  mounting ro. But since that's no more horrible than the kludge of
  using marker files in /. With this change, NanoBSD configs can safely
  use /firstboot + growfs to produce minimal images that grow to the
  size of the card.

Modified:
  head/etc/rc

Modified: head/etc/rc
==============================================================================
--- head/etc/rc	Sun Jan  3 19:06:17 2016	(r293114)
+++ head/etc/rc	Sun Jan  3 19:18:48 2016	(r293115)
@@ -131,11 +131,14 @@ done
 
 # Remove the firstboot sentinel, and reboot if it was requested.
 if [ -e ${firstboot_sentinel} ]; then
-	rm ${firstboot_sentinel}
+	[ ${root_rw_mount} = "yes" ] || mount -uw /
+	/bin/rm ${firstboot_sentinel}
 	if [ -e ${firstboot_sentinel}-reboot ]; then
-		rm ${firstboot_sentinel}-reboot
+		/bin/rm ${firstboot_sentinel}-reboot
+		[ ${root_rw_mount} = "yes" ] || mount -ur /
 		kill -INT 1
 	fi
+	[ ${root_rw_mount} = "yes" ] || mount -ur /
 fi
 
 echo ''