178 lines
4.3 KiB
Go
178 lines
4.3 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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//go:build linux && !android
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package hostinfo
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import (
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"bytes"
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"os"
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"strings"
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"golang.org/x/sys/unix"
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"tailscale.com/types/ptr"
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"tailscale.com/util/lineread"
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"tailscale.com/version/distro"
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)
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func init() {
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osVersion = lazyOSVersion.Get
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packageType = packageTypeLinux
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distroName = distroNameLinux
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distroVersion = distroVersionLinux
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distroCodeName = distroCodeNameLinux
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deviceModel = deviceModelLinux
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}
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var (
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lazyVersionMeta = &lazyAtomicValue[versionMeta]{f: ptr.To(linuxVersionMeta)}
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lazyOSVersion = &lazyAtomicValue[string]{f: ptr.To(osVersionLinux)}
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)
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type versionMeta struct {
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DistroName string
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DistroVersion string
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DistroCodeName string // "jammy", etc (VERSION_CODENAME from /etc/os-release)
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}
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func distroNameLinux() string {
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return lazyVersionMeta.Get().DistroName
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}
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func distroVersionLinux() string {
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return lazyVersionMeta.Get().DistroVersion
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}
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func distroCodeNameLinux() string {
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return lazyVersionMeta.Get().DistroCodeName
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}
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func deviceModelLinux() string {
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for _, path := range []string{
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// First try the Synology-specific location.
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// Example: "DS916+-j"
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"/proc/sys/kernel/syno_hw_version",
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// Otherwise, try the Devicetree model, usually set on
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// ARM SBCs, etc.
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// Example: "Raspberry Pi 4 Model B Rev 1.2"
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// Example: "WD My Cloud Gen2: Marvell Armada 375"
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"/sys/firmware/devicetree/base/model", // Raspberry Pi 4 Model B Rev 1.2"
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} {
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b, _ := os.ReadFile(path)
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if s := strings.Trim(string(b), "\x00\r\n\t "); s != "" {
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return s
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}
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}
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return ""
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}
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func getQnapQtsVersion(versionInfo string) string {
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for _, field := range strings.Fields(versionInfo) {
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if suffix, ok := strings.CutPrefix(field, "QTSFW_"); ok {
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return suffix
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}
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}
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return ""
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}
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func osVersionLinux() string {
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var un unix.Utsname
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unix.Uname(&un)
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return unix.ByteSliceToString(un.Release[:])
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}
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func linuxVersionMeta() (meta versionMeta) {
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dist := distro.Get()
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meta.DistroName = string(dist)
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propFile := "/etc/os-release"
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switch dist {
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case distro.Synology:
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propFile = "/etc.defaults/VERSION"
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case distro.OpenWrt:
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propFile = "/etc/openwrt_release"
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case distro.Unraid:
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propFile = "/etc/unraid-version"
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case distro.WDMyCloud:
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slurp, _ := os.ReadFile("/etc/version")
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meta.DistroVersion = string(bytes.TrimSpace(slurp))
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return
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case distro.QNAP:
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slurp, _ := os.ReadFile("/etc/version_info")
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meta.DistroVersion = getQnapQtsVersion(string(slurp))
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return
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}
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m := map[string]string{}
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lineread.File(propFile, func(line []byte) error {
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eq := bytes.IndexByte(line, '=')
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if eq == -1 {
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return nil
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}
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k, v := string(line[:eq]), strings.Trim(string(line[eq+1:]), `"'`)
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m[k] = v
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return nil
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})
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if v := m["VERSION_CODENAME"]; v != "" {
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meta.DistroCodeName = v
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}
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if v := m["VERSION_ID"]; v != "" {
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meta.DistroVersion = v
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}
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id := m["ID"]
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if id != "" {
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meta.DistroName = id
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}
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switch id {
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case "debian":
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// Debian's VERSION_ID is just like "11". But /etc/debian_version has "11.5" normally.
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// Or "bookworm/sid" on sid/testing.
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slurp, _ := os.ReadFile("/etc/debian_version")
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if v := string(bytes.TrimSpace(slurp)); v != "" {
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if '0' <= v[0] && v[0] <= '9' {
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meta.DistroVersion = v
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} else if meta.DistroCodeName == "" {
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meta.DistroCodeName = v
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}
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}
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case "", "centos": // CentOS 6 has no /etc/os-release, so its id is ""
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if meta.DistroVersion == "" {
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if cr, _ := os.ReadFile("/etc/centos-release"); len(cr) > 0 { // "CentOS release 6.10 (Final)
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meta.DistroVersion = string(bytes.TrimSpace(cr))
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}
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}
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}
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if v := m["PRETTY_NAME"]; v != "" && meta.DistroVersion == "" && !strings.HasSuffix(v, "/sid") {
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meta.DistroVersion = v
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}
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switch dist {
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case distro.Synology:
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meta.DistroVersion = m["productversion"]
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case distro.OpenWrt:
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meta.DistroVersion = m["DISTRIB_RELEASE"]
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case distro.Unraid:
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meta.DistroVersion = m["version"]
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}
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return
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}
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// linuxBuildTagPackageType is set by packagetype_*.go
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// build tag guarded files.
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var linuxBuildTagPackageType string
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func packageTypeLinux() string {
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if v := linuxBuildTagPackageType; v != "" {
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return v
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}
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// Report whether this is in a snap.
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// See https://snapcraft.io/docs/environment-variables
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// We just look at two somewhat arbitrarily.
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if os.Getenv("SNAP_NAME") != "" && os.Getenv("SNAP") != "" {
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return "snap"
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}
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return ""
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}
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