Determine if a go process is running in a terminal, or not

main.go

package main

import (
	"fmt"
	"syscall"
	"unsafe"
)

type winsize struct {
	Row    uint16
	Col    uint16
	Xpixel uint16
	Ypixel uint16
}

const (
	_TIOCGWINSZ = 0x5413 // OSX 1074295912
)

func isTerminal() bool {
	ws := &winsize{}
	retCode, _, _ := syscall.Syscall(syscall.SYS_IOCTL,
		uintptr(syscall.Stdin),
		uintptr(_TIOCGWINSZ),
		uintptr(unsafe.Pointer(ws)))

	if int(retCode) == -1 {
		return false
	}
	return true
}
func main() {
	fmt.Printf("Isterminal=%v\n", isTerminal())
}