systemd: add /etc/environment and service

packages/sysutils/systemd/package.mk

@@ -205,6 +205,7 @@ post_makeinstall_target() {
   cp $PKG_DIR/scripts/systemd-machine-id-setup $INSTALL/usr/bin
   cp $PKG_DIR/scripts/userconfig-setup $INSTALL/usr/bin
   cp $PKG_DIR/scripts/usercache-setup $INSTALL/usr/bin
+  cp $PKG_DIR/scripts/environment-setup $INSTALL/usr/bin
 
   # use systemd to set cpufreq governor and tunables
   find_file_path scripts/cpufreq && cp -PRv $FOUND_PATH $INSTALL/usr/bin
@@ -217,6 +218,7 @@ post_makeinstall_target() {
   # /etc/resolv.conf and /etc/hosts must be writable
   ln -sf /run/libreelec/resolv.conf $INSTALL/etc/resolv.conf
   ln -sf /run/libreelec/hosts $INSTALL/etc/hosts
+  ln -sf /run/libreelec/environment $INSTALL/etc/environment
 
   # provide 'halt', 'shutdown', 'reboot' & co.
   ln -sf /usr/bin/systemctl $INSTALL/usr/sbin/halt
@@ -276,6 +278,7 @@ post_install() {
   enable_service debugconfig.service
   enable_service userconfig.service
   enable_service usercache.service
+  enable_service envconfig.service
   enable_service kernel-overlays.service
   enable_service hwdb.service
   enable_service cpufreq.service

packages/sysutils/systemd/scripts/environment-setup

@@ -0,0 +1,16 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2019-present Team LibreELEC (https://libreelec.tv)
+
+# read config files
+for config in /etc/profile.d/*; do
+  if [ -f "$config" ] ; then
+    . $config
+  fi
+done
+
+# generate system-wide environment file
+cat <<EOF >/run/libreelec/environment
+PATH=${PATH}
+LD_LIBRARY_PATH=${LD_LIBRARY_PATH}
+EOF

packages/sysutils/systemd/system.d/envconfig.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=Generate system-wide /etc/environment file
+DefaultDependencies=no
+After=systemd-tmpfiles-setup.service
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/environment-setup
+RemainAfterExit=yes
+
+[Install]
+WantedBy=sysinit.target