RFC: cleartmp: Allow user configurable mtree for /tmp

[Xin LI]

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Hi,

Here is a patch that adds a new variable, tmp_mtree, which allows a user
defined mtree for /tmp.  This is useful when clear_tmp_enable="YES" and
some directories are needed to be exist in /tmp before services is started.

Cheers,
- -- 
Xin LI <delphij at delphij.net>	http://www.delphij.net/
FreeBSD - The Power to Serve!	       Live free or die
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Index: cleartmp
===================================================================
--- cleartmp	(revision 215822)
+++ cleartmp	(working copy)
@@ -54,6 +54,9 @@
 		# Create X related directories with proper permissions.
 		mkdir -m 1777 ${x11_socket_dirs}
 	fi
+	if [ -n "${tmp_mtree}" ]; then
+		/usr/sbin/mtree -deU -f ${tmp_mtree} -p /tmp > /dev/null
+	fi
 }
 
 load_rc_config $name