Node_Exporter/vendor/github.com/Sirupsen/logrus/terminal_notwindows.go
2017-02-28 18:20:24 -04:00

29 lines
670 B
Go

// Based on ssh/terminal:
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build linux darwin freebsd openbsd netbsd dragonfly
// +build !appengine
package logrus
import (
"io"
"os"
"syscall"
"unsafe"
)
// IsTerminal returns true if stderr's file descriptor is a terminal.
func IsTerminal(f io.Writer) bool {
var termios Termios
switch v := f.(type) {
case *os.File:
_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(v.Fd()), ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
return err == 0
default:
return false
}
}