Lightweight process/daemon monitor? (ie. monitor and restart a single process)

Can anybody recommend a lightweight process/daemon monitor? I'm running a user-land service process and I just need something to monitor and restart it when it crashes. The system is running embedded linux so systemd isn't installed, etc. I'm just looking for a single-binary monitor that can run like this: /usr/bin/monitor my_process --restart=3 (ie. restart up to 3 times, or whatever other command-line options, etc)