How to exit a go program honoring deferred calls?

Question

I need to use defer to free allocations manually created using C library, but I also need to os.Exit with non 0 status at some point. The

Answer 1

Just move your program down a level and return your exit code:

package main

import "fmt"
import "os"

func doTheStuff() int {
    defer fmt.Println("!")

    return 3
}

func main() {
    os.Exit(doTheStuff())
}