add more variables for start-stop-daemon and supervise-daemon options

Add the following variables to expose more arguments that can be passed
to start-stop-daemon or supervise-daemon:

- directory will be passed to --chdir
- error_log will be passed to --stderr
- output_log will be passed to --stdout
- umask will be passed to umask

This is for #184.

man/openrc-run.8

@@ -157,6 +157,24 @@ use this to change the user id before
 or
 .Xr supervise-daemon 8
 launches the daemon
+.It Ar output_log
+This is the path to a file or named pipe where the standard output from
+the service will be redirected. If you are starting this service with
+.Xr start-stop-daemon 8 ,
+,  you must set
+.Pa command_background
+to true. Keep in mind that this path will be inside the chroot if the
+.Pa chroot
+variable is set.
+.It Ar error_log
+The same thing as
+.Pa output_log
+but for the standard error output.
+.It Ar directory
+.Xr start-stop-daemon 8
+and
+.Xr supervise-daemon 8
+will chdir to this directory before starting the daemon.
 .It Ar chroot
 .Xr start-stop-daemon 8
 and
@@ -201,6 +219,8 @@ used along with in_background_fake to support re-entrant services.
 .It Ar in_background_fake
 Space separated list of commands which should always succeed when
 in_background is yes.
+.It Ar umask
+Set the umask of the daemon.
 .Pp
 Keep in mind that eval is used to process chroot, command, command_args_*,
 command_user, pidfile and procname. This may affect how they are

sh/start-stop-daemon.sh

@@ -44,9 +44,13 @@ ssd_start()
 	eval start-stop-daemon --start \
 		--exec $command \
 		${chroot:+--chroot} $chroot \
+		${directory:+--chdir} $directory \
+		${output_log+--stdout} $output_log \
+		${error_log+--stderr} $error_log \
 		${procname:+--name} $procname \
 		${pidfile:+--pidfile} $pidfile \
 		${command_user+--user} $command_user \
+		${umask+--umask} $umask \
 		$_background $start_stop_daemon_args \
 		-- $command_args $command_args_background
 	if eend $? "Failed to start ${name:-$RC_SVCNAME}"; then

sh/supervise-daemon.sh

@@ -24,12 +24,16 @@ supervise_start()
 	# to work properly.
 	eval supervise-daemon "${RC_SVCNAME}" --start \
 		${retry:+--retry} $retry \
+		${directory:+--chdir} $directory  \
 		${chroot:+--chroot} $chroot \
+		${output_log+--stdout} ${output_log} \
+		${error_log+--stderr} $error_log \
 		${pidfile:+--pidfile} $pidfile \
 		${respawn_delay:+--respawn-delay} $respawn_delay \
 		${respawn_max:+--respawn-max} $respawn_max \
 		${respawn_period:+--respawn-period} $respawn_period \
 		${command_user+--user} $command_user \
+		${umask+--umask} $umask \
 		$supervise_daemon_args \
 		$command \
 		-- $command_args $command_args_foreground