mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-23 20:36:21 +01:00
65 lines
2.1 KiB
Go
65 lines
2.1 KiB
Go
// Copyright 2019 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build (darwin || freebsd || openbsd) && !nouname
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// +build darwin freebsd openbsd
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// +build !nouname
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package collector
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import (
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"bytes"
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"strings"
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"golang.org/x/sys/unix"
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)
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func getUname() (uname, error) {
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var utsname unix.Utsname
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if err := unix.Uname(&utsname); err != nil {
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return uname{}, err
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}
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nodeName, domainName := parseHostNameAndDomainName(utsname)
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output := uname{
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SysName: string(utsname.Sysname[:bytes.IndexByte(utsname.Sysname[:], 0)]),
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Release: string(utsname.Release[:bytes.IndexByte(utsname.Release[:], 0)]),
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Version: string(utsname.Version[:bytes.IndexByte(utsname.Version[:], 0)]),
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Machine: string(utsname.Machine[:bytes.IndexByte(utsname.Machine[:], 0)]),
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NodeName: nodeName,
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DomainName: domainName,
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}
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return output, nil
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}
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// parseHostNameAndDomainName for FreeBSD,OpenBSD,Darwin.
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// Attempts to emulate what happens in the Linux uname calls since these OS doesn't have a Domainname.
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func parseHostNameAndDomainName(utsname unix.Utsname) (hostname string, domainname string) {
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nodename := string(utsname.Nodename[:bytes.IndexByte(utsname.Nodename[:], 0)])
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split := strings.SplitN(nodename, ".", 2)
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// We'll always have at least a single element in the array. We assume this
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// is the hostname.
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hostname = split[0]
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// If we have more than one element, we assume this is the domainname.
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// Otherwise leave it to "(none)" like Linux.
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domainname = "(none)"
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if len(split) > 1 {
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domainname = split[1]
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}
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return hostname, domainname
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}
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