60 lines
1.2 KiB
Go
60 lines
1.2 KiB
Go
package main
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import (
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"log"
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"os"
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"os/exec"
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"syscall"
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"time"
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)
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// RunChan to this channel we send command and its argv to execute as separate process.
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var RunChan = make(chan []string, 128)
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// Spawner forks and execs given program, and also detaches form its control tty.
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func Spawner() {
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for prg := range RunChan {
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devnullR, _ := os.Open(os.DevNull)
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devnullW, _ := os.OpenFile(os.DevNull, os.O_WRONLY|os.O_APPEND, 0644)
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spa := syscall.SysProcAttr{
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Setsid: true,
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Foreground: false,
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}
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pa := syscall.ProcAttr{
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Dir: os.Getenv(`HOME`),
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Env: os.Environ(),
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Files: []uintptr{devnullR.Fd(), devnullW.Fd(), devnullW.Fd()},
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Sys: &spa,
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}
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bin, err := exec.LookPath(prg[0])
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if err != nil {
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log.Printf("Unable to spawn %s: %s", prg[0], err)
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}
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_, err = syscall.ForkExec(bin, prg, &pa)
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if err != nil {
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log.Printf("Unable to spawn %s: %s", prg[0], err)
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}
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// Close file errors we don't handle :) at all.
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_ = devnullR.Close()
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_ = devnullW.Close()
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}
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}
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// CleanZombies reaps processes spawned by Spawner() and already exited.
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func CleanZombies() {
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r := syscall.Rusage{}
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for {
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_, _ = syscall.Wait4(-1, nil, 0, &r)
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time.Sleep(1 * time.Minute)
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}
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}
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