61 lines
1.1 KiB
Go
61 lines
1.1 KiB
Go
package main
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import (
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"bufio"
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"fmt"
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"os/exec"
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"time"
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)
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func main() {
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cmd := neverReturningThing()
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//cmd := returningThingWithinThreeSecs()
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//cmd := returningThingAfterThreeSecs()
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stdout, _ := cmd.StdoutPipe()
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busy := make(chan bool, 1)
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cmd.Start()
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scanner := bufio.NewScanner(stdout)
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scanner.Split(bufio.ScanLines)
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go func() {
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fmt.Println("starting scanner.scan (blocking)")
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for scanner.Scan() {
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fmt.Println("scanned")
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m := scanner.Text()
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fmt.Println(m)
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if busy != nil {
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busy <- true
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}
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}
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}()
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fmt.Println("starting select chans")
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var err error
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select {
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case <-busy:
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fmt.Println("busy chan")
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busy = nil
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case <-time.After(3 * time.Second):
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pkill := cmd.Process.Kill()
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fmt.Println("timeout triggered? err: %w", pkill)
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}
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fmt.Println("starting Wait()")
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err = cmd.Wait()
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fmt.Printf("done? here's an error: %w", err)
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}
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func returningThingWithinThreeSecs() *exec.Cmd {
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return exec.Command("echo", "sup")
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}
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func returningThingAfterThreeSecs() *exec.Cmd {
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return exec.Command("ping", "google.com")
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}
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func neverReturningThing() *exec.Cmd {
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return exec.Command("ssh", "user@unknown.local")
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}
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