A simple app wrapper script which uses https://github.com/xiezhenye/waitpid to wait for the pid to and handles termination of the app if the script terminates. Call the script with ./app-wrapper syslogd <args>

app-wrapper

#!/bin/sh
BIN="$1"; shift
[ -z "$BIN" ] && { echo >&2 "ERROR: no app passed"; exit 1; }
APP_NAME=$(basename "$BIN")
PID_FILE=${PID_FILE:-"/var/run/${APP_NAME}.pid"}
function killapp() { [ -n "$APP_PID" ] && kill -s TERM $APP_PID 2>/dev/null >/dev/nulll; }
trap killapp INT TERM SIGTERM EXIT
rm -f "$PID_FILE" 2>/dev/null
APP_DIR=$(dirname "$BIN")
CUR_DIR="$PWD"
cd "$APP_DIR"
PATH="$APP_DIR:$PATH"
"$APP_NAME" $@
cd "$CUR_DIR"
APP_PID=$(pidof -s "$APP_NAME")
echo "$APP_PID" > "$PID_FILE"
# Wait for app to complete
waitpid $APP_PID
EXIT_CODE=$?
# Remove pid after use
rm -f "$PID_FILE" 2>/dev/null
exit $EXIT_CODE