README
¶
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
$SPAWNEDis empty, we know its safe to spawn another process and exit (not an infinite loop). - the arguments, environment are carried over to the new process, so consider setting those before calling spawn.Spawn()
- if your database (or something) is locked you may want to wait until after spawn check to lock the db
Usage
import "github.com/aerth/spawn"
if os.Getenv(spawn.SPAWNED) == "" {
err := spawn.Spawn()
if err == nil {
os.Exit(0)
}
}
Documentation
¶
Overview ¶
Package spawn a process like a salmon
Index ¶
Constants ¶
View Source
const ( // SPAWNED_ENV ("$SPAWNED") is an environmental variable that is set for new processes created with Spawn() // Your application may use it to count spawn depth. // SPAWNED_ENV of 1 means first spawn, SPAWNTIME=2 means was spawned from a spawn, // SPAWNED_ENV=3 means this program was spawned from a spawned program that was spawned from another instance of the program. SPAWNED_ENV = "SPAWNED" )
Variables ¶
View Source
var GetEnviron func() []string = os.Environ
GetEnviron can be used, but if using Destroy() then its easier to just os.Setenv() before running Spawn() before Destroy()
Functions ¶
Types ¶
This section is empty.
Source Files
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