Add -noauto autofs map, for automatic handling of fstab entries

marked "noauto".

MFC after:	1 month
Sponsored by:	The FreeBSD Foundation

etc/auto_master

@@ -6,3 +6,4 @@
 # When using the -media special map, make sure to edit devd.conf(5)
 # to move the call to "automount -c" out of the comments section.
 #/media		-media		-nosuid
+#/-		-noauto

etc/autofs/Makefile

@@ -1,6 +1,6 @@
 # $FreeBSD$
 
-FILES=		include_ldap special_hosts special_media special_null
+FILES=		include_ldap special_hosts special_media special_noauto special_null
 
 NO_OBJ=
 FILESDIR=	/etc/autofs

etc/autofs/special_noauto

@@ -0,0 +1,29 @@
+#!/bin/sh
+#
+# $FreeBSD$
+#
+
+print_available() {
+	sed 's/#.*//' /etc/fstab | awk '$4 ~ /noauto/ { print $2 }'
+}
+
+print_one() {
+	local _mntpoint
+
+	_mntpoint="${1%/}"
+	
+	sed 's/#.*//' /etc/fstab | awk '
+	$2 == "'"${_mntpoint}"'" && $4 ~ /noauto/ {
+		if ($1 ~ /:/) { dev=$1 } else { dev=":"$1 }
+		print "-fstype=" $3 "," $4, dev
+	}'
+}
+
+if [ $# -eq 0 ]; then
+	print_available
+	exit 0
+fi
+
+print_one "$1"
+exit 0
+

usr.sbin/autofs/auto_master.5

@@ -27,7 +27,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd January 9, 2015
+.Dd March 13, 2015
 .Dt AUTO_MASTER 5
 .Os
 .Sh NAME
@@ -260,6 +260,11 @@ when they are automatically created.
 .It Li -media
 Query devices that are not yet mounted, but contain valid filesystems.
 Generally used to access files on removable media.
+.It Li -noauto
+Mount filesystems configured in
+.Xr fstab 5
+as "noauto".
+This needs to be set up as a direct map.
 .It Li -null
 Prevent
 .Xr automountd 8