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matterbridge/vendor/github.com/Sirupsen/logrus/terminal_notwindows.go

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// 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
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// +build !appengine
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package logrus
import (
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"io"
"os"
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"syscall"
"unsafe"
)
// IsTerminal returns true if stderr's file descriptor is a terminal.
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func IsTerminal(f io.Writer) bool {
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var termios Termios
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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
}
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}