Trivial Go Init

README.md

Inspired by http://git.suckless.org/sinit

Provides basic reaping of child processes for use in e.g. containers. Note however that this code compiles to a substantially larger binary than sinit. Sinit linked statically against Musl is <14KB on my machine, while this code ends up at 2.7MB due to the Go runtime.

If you must have a license, consider it under the MIT/X Consortium license (though I'm happy to confirm relicensing to whatever license works for you).

ginit.go

package main

import (
    "log"
    "os"
    "os/exec"
    "syscall"
)


const initcmd string   = "/etc/rc.init"

func main() {

    go func() {
        var wstatus syscall.WaitStatus

        for {
            _, err := syscall.Wait4(-1, &wstatus, 0, nil)
            if err != nil {
        	log.Println(err)
            }
        }
    }()

    os.Chdir("/")
    cmd := exec.Command(initcmd)
    cmd.Args = os.Args[1:]
    cmd.Stdout = os.Stdout
    cmd.Stderr = os.Stderr
    err := cmd.Run()
    if err != nil {
        log.Fatal(err)
    }
}