Merge pull request #594 from sirupsen/sys_unix

Use x/sys/unix instead of syscall

terminal_notwindows.go

@@ -11,8 +11,9 @@ package logrus
 import (
 	"io"
 	"os"
-	"syscall"
 	"unsafe"
+
+	"golang.org/x/sys/unix"
 )
 
 // IsTerminal returns true if stderr's file descriptor is a terminal.
@@ -20,7 +21,7 @@ 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)
+		_, _, err := unix.Syscall6(unix.SYS_IOCTL, uintptr(v.Fd()), ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
 		return err == 0
 	default:
 		return false