name : rtc-sys-time-init-generator #!/bin/sh # This generator instantiates rtc-sys-time-init@dev-rtc*.service by hooking it # into sysinit.target when requested by kernel command line parameter # ubuntu_core.rtc_sys_time_init=dev-rtc*. Instances are based on the template # rtc-sys-time-init@.service that is not generated. DEBUG_ENABLE="false" log() { echo "$@" >> "/dev/kmsg" } debug() { if [ "$DEBUG_ENABLE" = "true" ]; then log "$@" fi } normal_dir="$1" # Look for kernel command line parameter ubuntu_core.rtc_sys_time_init if ! dev_node=$(/usr/libexec/core/get-arg "ubuntu_core.rtc_sys_time_init"); then debug "Kernel command line does not contain parameter ubuntu_core.rtc_sys_time_init" exit 0 fi # Expect /dev/rtc and /dev/rtc0 to /dev/rtc9 if ! expr "$dev_node" : '^/dev/rtc[0-9]\{0,1\}$' >/dev/null; then log "Warning: kernel command line parameter ubuntu_core.rtc_sys_time_init=$dev_node seems invalid" # Do not exit, require highly visible service failure fi dev_unit=$(systemd-escape --path "$dev_node") instance="rtc-sys-time-init@$dev_unit.service" target_dir="$normal_dir/sysinit.target.wants" target_link=$target_dir/$instance template="/usr/lib/systemd/system/rtc-sys-time-init@.service" if [ -L "$target_link" ]; then debug "Already enabled" exit 0 fi if [ -d "$target_dir" ] || mkdir -p "$target_dir"; then if ln -snf "$template" "$target_link"; then debug "Enabled $instance: $target_link -> $template" else log "Error: cannot create symlink $target_link -> $template" exit 1 fi else log "Error: cannot create target directory $target_dir" fi