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#!/bin/sh
set -f
LOG=""
DEBUG_LEVEL=1
LOG_D="/run/vyos-router"
ENABLE="enabled"
DISABLE="disabled"
FOUND="found"
NOTFOUND="notfound"
RUN_ENABLED_FILE="$LOG_D/$ENABLE"
VYOS_SYSTEM_TARGET="/lib/systemd/system/vyos.target"
VYOS_TARGET_NAME="vyos.target"
debug() {
local lvl="$1"
shift
[ "$lvl" -gt "$DEBUG_LEVEL" ] && return
if [ -z "$LOG" ]; then
local log="$LOG_D/${0##*/}.log"
{ [ -d "$LOG_D" ] || mkdir -p "$LOG_D"; } &&
{ : > "$log"; } >/dev/null 2>&1 && LOG="$log" ||
LOG="/dev/kmsg"
fi
echo "$@" >> "$LOG"
}
default() {
_RET="$ENABLE"
}
main() {
local normal_d="$1" early_d="$2" late_d="$3"
local target_name="multi-user.target" gen_d="$early_d"
local link_path="$gen_d/${target_name}.wants/${VYOS_TARGET_NAME}"
local ds="$NOTFOUND"
debug 1 "$0 normal=$normal_d early=$early_d late=$late_d"
debug 2 "$0 $*"
local search result="error" ret=""
for search in default; do
if $search; then
debug 1 "$search found $_RET"
[ "$_RET" = "$ENABLE" -o "$_RET" = "$DISABLE" ] &&
result=$_RET && break
else
ret=$?
debug 0 "search $search returned $ret"
fi
done
# enable AND ds=found == enable
# enable AND ds=notfound == disable
# disable || <any> == disabled
if [ "$result" = "$ENABLE" ]; then
if [ -e "$link_path" ]; then
debug 1 "already enabled: no change needed"
else
[ -d "${link_path%/*}" ] || mkdir -p "${link_path%/*}" ||
debug 0 "failed to make dir $link_path"
if ln -snf "$VYOS_SYSTEM_TARGET" "$link_path"; then
debug 1 "enabled via $link_path -> $VYOS_SYSTEM_TARGET"
else
ret=$?
debug 0 "[$ret] enable failed:" \
"ln $VYOS_SYSTEM_TARGET $link_path"
fi
fi
: > "$RUN_ENABLED_FILE"
elif [ "$result" = "$DISABLE" ]; then
if [ -f "$link_path" ]; then
if rm -f "$link_path"; then
debug 1 "disabled. removed existing $link_path"
else
ret=$?
debug 0 "[$ret] disable failed, remove $link_path"
fi
else
debug 1 "already disabled: no change needed [no $link_path]"
fi
if [ -e "$RUN_ENABLED_FILE" ]; then
rm -f "$RUN_ENABLED_FILE"
fi
else
debug 0 "unexpected result '$result' 'ds=$ds'"
ret=3
fi
return $ret
}
main "$@"
# vi: ts=4 expandtab
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