Using os.StartProcess() in Go for platform-independent system command execution.

startProcess.go

package main

import (
	"os"
	"os/exec"
)

func Start(args ...string) (p *os.Process, err error) {
	if args[0], err = exec.LookPath(args[0]); err == nil {
		var procAttr os.ProcAttr
		procAttr.Files = []*os.File{os.Stdin,
			os.Stdout, os.Stderr}
		p, err := os.StartProcess(args[0], args, &procAttr)
		if err == nil {
			return p, nil
		}
	}
	return nil, err
}

func main() {
	if proc, err := Start("ping", "-c 3", "www.google.com"); err == nil {
		proc.Wait()
	}
	if proc, err := Start("zsh"); err == nil {
		proc.Wait()
	}
}

Hi, thank you for sharing.
Do you know how i can capture the output stream from the StartProcess command in realtime?

It's been years since I've played with all this. Gotta catch back up. Browsing the package documentation might provide some insight. Maybe ask your AI for some guidance? If I catch back up and figure anything out I'll try to update my response here.

…

-------- Original Message --------

On 9/10/24 07:50, rsvix wrote: @rsvix commented on this gist. --------------------------------------------------------------- Hi, thank you for sharing. Do you know how i can capture the output stream from the StartProcess command in realtime? — Reply to this email directly, [view it on GitHub](https://gist.github.com/lee8oi/ec404fa99ea0f6efd9d1#gistcomment-5184743) or [unsubscribe](https://github.com/notifications/unsubscribe-auth/AAGWUWZPS46IT7R3GWCFIETZV3TKNBFKMF2HI4TJMJ2XIZLTSKBKK5TBNR2WLJDUOJ2WLJDOMFWWLO3UNBZGKYLEL5YGC4TUNFRWS4DBNZ2F6YLDORUXM2LUPGBKK5TBNR2WLJDHNFZXJJDOMFWWLK3UNBZGKYLEL52HS4DFVRZXKYTKMVRXIX3UPFYGLK2HNFZXIQ3PNVWWK3TUUZ2G64DJMNZZDAVEOR4XAZNEM5UXG5FFOZQWY5LFVAZDANJTGA4TCMFHORZGSZ3HMVZKMY3SMVQXIZI). You are receiving this email because you authored the thread. Triage notifications on the go with GitHub Mobile for [iOS](https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675) or [Android](https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub).

Thank you @lee8oi
I've tried using io pipes, MultiReader and bufio.NewScanner, but with no luck

For anyone reading, im trying to do something like this, but using os.StartProcess instead of exec.Command

multi := io.MultiReader(stdout, stderr)

if err := cmd.Start(); err != nil {
return err
}

in := bufio.NewScanner(multi)

for in.Scan() {
log.Printf(in.Text()) // write each line to the log or anything else
}