mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
synced 2024-12-22 03:30:35 +00:00
233db64cc1
a little copying is better than a little dependency -- go proverb We have this dependency on docker, a.k.a moby: a gigantic library, and we only need ~70 LOC, so here I tried moving it inline instead. Co-authored-by: Felix Lange <fjl@twurst.com>
36 lines
1.1 KiB
Go
36 lines
1.1 KiB
Go
// This file originates from Docker/Moby,
|
|
// https://github.com/moby/moby/blob/master/pkg/reexec/reexec.go
|
|
// Licensed under Apache License 2.0: https://github.com/moby/moby/blob/master/LICENSE
|
|
// Copyright 2013-2018 Docker, Inc.
|
|
//
|
|
// Package reexec facilitates the busybox style reexec of the docker binary that
|
|
// we require because of the forking limitations of using Go. Handlers can be
|
|
// registered with a name and the argv 0 of the exec of the binary will be used
|
|
// to find and execute custom init paths.
|
|
package reexec
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
)
|
|
|
|
var registeredInitializers = make(map[string]func())
|
|
|
|
// Register adds an initialization func under the specified name
|
|
func Register(name string, initializer func()) {
|
|
if _, exists := registeredInitializers[name]; exists {
|
|
panic(fmt.Sprintf("reexec func already registered under name %q", name))
|
|
}
|
|
registeredInitializers[name] = initializer
|
|
}
|
|
|
|
// Init is called as the first part of the exec process and returns true if an
|
|
// initialization function was called.
|
|
func Init() bool {
|
|
if initializer, ok := registeredInitializers[os.Args[0]]; ok {
|
|
initializer()
|
|
return true
|
|
}
|
|
return false
|
|
}
|