#!/bin/sh
# Copyright: 2022 Lorenzo Puliti <plorenzo@disroot.org>
# License: BSD-3-clause

# sv_wtime checkbin <service>   1=bin file empty || bin path does not exist
# sv_wtime test <service>           1=no recorded wtime || binary has been upgraded
# sv_wtime update <service>
#WARNING retcode 0=noop 1=action needed

if [ $# -ne 2 ]; then
	echo "sv_wtime: wrong syntax"  && exit 0
fi

runitsvdir=$CPSV_DEST
test -n "$runitsvdir" || runitsvdir=/etc/sv
service="${2}"
binf="$runitsvdir/$service/.meta/bin"
wtimef="$runitsvdir/$service/.meta/wtime"
test -r "$binf" || exit 0 #can't do anything without this
binpath="$(cat $binf)"

case ${1} in
   checkbin)
	test -n "$binpath" || exit 1
	test -e "$binpath" || exit 1
	exit 0
	;;
   test)
	bintime="$(stat -c %W $binpath)" || exit 0
	test -r "$wtimef" || exit 1
	svtime="$(cat $wtimef)"
	[ "$bintime" -gt "$svtime" ] && exit 1
	exit 0
	;;
   update)
	bintime="$(stat -c %W $binpath)" || exit 0
	echo "$bintime" > "$wtimef"
	;;
	*)
	;;
esac