spawn

like a salmon

spawn the current process

as seen in:

• server daemons
• http servers
• chat bots
• long running processes of all kinds

"use anywhere!"

• go routines
• main function
• "click to run the program"
• hook it up to your signal.Notify() ?

Important notes

• this library sets the environmental variable SPAWNED=N where N is the number of levels into this we are
• this means if $SPAWNED is empty, we know its safe to spawn another process and exit (not an infinite loop).
• the arguments, environment are carried over to the new process, so consider setting those before calling spawn.Spawn()
• if your database (or something) is locked you may want to wait until after spawn check to lock the db

Usage

import "github.com/aerth/spawn"
if os.Getenv(spawn.SPAWNED) == "" {
  err := spawn.Spawn()
  if err == nil {
    os.Exit(0)
  }
}