Current File : //snap/core20/current/lib/systemd/system-generators/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
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