1// Copyright 2018 The Go Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style 3// license that can be found in the LICENSE file. 4 5package os 6 7import "syscall" 8 9// gethostname syscall cannot be used because it also returns the domain. 10// Therefore, hostname is retrieve with uname syscall and the Nodename field. 11 12func hostname() (name string, err error) { 13 var u syscall.Utsname 14 if errno := syscall.Uname(&u); errno != nil { 15 return "", NewSyscallError("uname", errno) 16 } 17 b := make([]byte, len(u.Nodename)) 18 i := 0 19 for ; i < len(u.Nodename); i++ { 20 if u.Nodename[i] == 0 { 21 break 22 } 23 b[i] = byte(u.Nodename[i]) 24 } 25 return string(b[:i]), nil 26} 27