// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package os
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import (
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"internal/syscall/windows"
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"syscall"
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)
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func hostname() (name string, err error) {
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// Use PhysicalDnsHostname to uniquely identify host in a cluster
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const format = windows.ComputerNamePhysicalDnsHostname
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n := uint32(64)
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for {
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b := make([]uint16, n)
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err := windows.GetComputerNameEx(format, &b[0], &n)
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if err == nil {
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return syscall.UTF16ToString(b[:n]), nil
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}
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if err != syscall.ERROR_MORE_DATA {
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return "", NewSyscallError("ComputerNameEx", err)
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}
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// If we received an ERROR_MORE_DATA, but n doesn't get larger,
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// something has gone wrong and we may be in an infinite loop
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if n <= uint32(len(b)) {
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return "", NewSyscallError("ComputerNameEx", err)
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}
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}
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}
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