Add ${name}_env and ${name}_prepend. ${name}_env is an argument list which

will be passed to env(1).  ${name}_prepend is simply prepended to the command
line for $command.

etc/rc.subr

@@ -749,6 +749,8 @@ check_startmsgs()
 #				NOTE:	$flags from the parent environment
 #					can be used to override this.
 #
+#	${name}_env	n	Environment variables to run ${command} with.
+#
 #	${name}_fib	n	Routing table number to run ${command} with.
 #
 #	${name}_nice	n	Nice level to run ${command} at.
@@ -764,6 +766,8 @@ check_startmsgs()
 #				to run the chrooted ${command} with.
 #				Requires /usr to be mounted.
 #
+#	${name}_prepend	n	Command added before ${command}.
+#
 #	${rc_arg}_cmd	n	If set, use this as the method when invoked;
 #				Otherwise, use default command (see below)
 #
@@ -937,7 +941,8 @@ run_rc_command()
 	eval _chdir=\$${name}_chdir	_chroot=\$${name}_chroot \
 	    _nice=\$${name}_nice	_user=\$${name}_user \
 	    _group=\$${name}_group	_groups=\$${name}_groups \
-	    _fib=\$${name}_fib
+	    _fib=\$${name}_fib		_env=\$${name}_env \
+	    _prepend=\$${name}_prepend
 
 	if [ -n "$_user" ]; then	# unset $_user if running as that user
 		if [ "$_user" = "$(eval $IDCMD)" ]; then
@@ -1022,12 +1027,14 @@ run_rc_command()
 				_doit="\
 ${_nice:+nice -n $_nice }\
 ${_fib:+setfib -F $_fib }\
+${_env:+env $_env }\
 chroot ${_user:+-u $_user }${_group:+-g $_group }${_groups:+-G $_groups }\
 $_chroot $command $rc_flags $command_args"
 			else
 				_doit="\
 ${_chdir:+cd $_chdir && }\
 ${_fib:+setfib -F $_fib }\
+${_env:+env $_env }\
 $command $rc_flags $command_args"
 				if [ -n "$_user" ]; then
 				    _doit="su -m $_user -c 'sh -c \"$_doit\"'"
@@ -1038,6 +1045,9 @@ $command $rc_flags $command_args"
 					fi
 					_doit="nice -n $_nice $_doit"
 				fi
+				if [ -n "$_prepend" ]; then
+					_doit="$_prepend $_doit"
+				fi
 			fi
 
 					# run the full command

share/man/man8/rc.subr.8

@@ -29,7 +29,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd September 23, 2012
+.Dd October 12, 2014
 .Dt RC.SUBR 8
 .Os
 .Sh NAME
@@ -568,6 +568,22 @@ to before running
 Only supported after
 .Pa /usr
 is mounted.
+.It Va ${name}_env
+A list of environment variables to run
+.Va command
+with.
+This will be passed as arguments to
+.Xr env 1
+utility.
+.It Va ${name}_fib
+FIB
+.Pa Routing Table
+number to run
+.Va command
+with.
+See
+.Xr setfib 1
+for more details.
 .It Va ${name}_flags
 Arguments to call
 .Va command
@@ -622,6 +638,14 @@ as.
 Comma separated list of supplementary groups to run the chrooted
 .Va command
 with.
+.It Va ${name}_prepend
+Commands to be prepended to
+.Va command .
+This is a generic version of
+.Va ${name}_env ,
+.Va ${name}_fib ,
+or
+.Va ${name}_nice .
 .It Ar argument Ns Va _cmd
 Shell commands which override the default method for
 .Ar argument .