Listen for SIGINFO to report progress

main.go

package main

import (
        "fmt"
        "os"
        "os/signal"
        "syscall"
        "time"
)

func main() {
        var i int

        sigs := make(chan os.Signal, 1)
        signal.Notify(sigs, syscall.SIGINFO)
        go func() {
                for {
                        <-sigs
                        fmt.Printf("Processed up to: %d\n", i)
                }
        }()

        // simulate doing lots of hard work for 60 seconds
        go func() {
                for {
                        i++
                        time.Sleep(500 * time.Millisecond)
                }
        }()
        time.Sleep(60 * time.Second)
}