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// Copyright 2009 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.
package os
import (
"internal/syscall/windows"
"syscall"
)
func hostname() (name string, err error) {
// Use PhysicalDnsHostname to uniquely identify host in a cluster
const format = windows.ComputerNamePhysicalDnsHostname
n := uint32(64)
for {
b := make([]uint16, n)
err := windows.GetComputerNameEx(format, &b[0], &n)
if err == nil {
return syscall.UTF16ToString(b[:n]), nil
}
if err != syscall.ERROR_MORE_DATA {
return "", NewSyscallError("ComputerNameEx", err)
}
// If we received an ERROR_MORE_DATA, but n doesn't get larger,
// something has gone wrong and we may be in an infinite loop
if n <= uint32(len(b)) {
return "", NewSyscallError("ComputerNameEx", err)
}
}
}
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