add rc.d script for the nix-daemon

misc/freebsd/meson.build

@@ -0,0 +1,10 @@
+configure_file(
+  input : 'nix-daemon.in',
+  output : 'nix-daemon',
+  install : true,
+  install_dir : get_option('prefix') / 'etc/rc.d',
+  install_mode : 'rwxr-xr-x',
+  configuration : {
+    'bindir' : bindir,
+  },
+)

misc/freebsd/nix-daemon.in

@@ -0,0 +1,49 @@
+#!/bin/sh
+#
+# PROVIDE: nix_daemon
+# REQUIRE: DAEMON
+# KEYWORD: shutdown
+#
+# Add the following lines to /etc/rc.conf to enable nix-daemon:
+#
+# nix_daemon_enable="YES"
+#
+
+# shellcheck source=/dev/null
+. /etc/rc.subr
+
+name="nix_daemon"
+# shellcheck disable=SC2034
+rcvar="nix_daemon_enable"
+
+load_rc_config $name
+
+: "${nix_daemon_enable:=NO}"
+
+command="@bindir@/nix-daemon"
+command_args=""
+pidfile="/var/run/nix-daemon.pid"
+
+# shellcheck disable=SC2034
+start_cmd="${name}_start"
+# shellcheck disable=SC2034
+stop_cmd="${name}_stop"
+
+nix_daemon_start() {
+    echo "Starting ${name}."
+    # command_args is intentionally unquoted to allow multiple arguments
+    # shellcheck disable=SC2086
+    /usr/sbin/daemon -c -f -p "${pidfile}" "${command}" ${command_args}
+}
+
+nix_daemon_stop() {
+    if [ -f "${pidfile}" ]; then
+        echo "Stopping ${name}."
+        kill -TERM "$(cat "${pidfile}")"
+        rm -f "${pidfile}"
+    else
+        echo "${name} is not running."
+    fi
+}
+
+run_rc_command "$1"

misc/meson.build

@@ -9,3 +9,7 @@ endif
 if host_machine.system() == 'darwin'
   subdir('launchd')
 endif
+
+if host_machine.system() == 'freebsd'
+  subdir('freebsd')
+endif