| Colin Cross | 1371fe4 | 2019-03-19 21:08:48 -0700 | [diff] [blame] | 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 | |
| 5 | package os |
| 6 | |
| 7 | import "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 | |
| 12 | func 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 | } |