97 lines
2.6 KiB
Go
97 lines
2.6 KiB
Go
package buildinfo
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import (
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"regexp"
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"strings"
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"unsafe"
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"github.com/shirou/gopsutil/v3/host"
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"golang.org/x/sys/windows"
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)
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// GetOSVersion returns OS version, kernel and bitness
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// On Windows it performs additional output enhancements.
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func GetOSVersion() (osVersion, osKernel string) {
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if platform, _, version, err := host.PlatformInformation(); err == nil && platform != "" {
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osVersion = platform
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if version != "" {
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osVersion += " " + version
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}
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}
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if version, err := host.KernelVersion(); err == nil && version != "" {
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osKernel = version
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// Prevent duplication of output on Windows
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if strings.Contains(osVersion, osKernel) {
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deduped := strings.TrimSpace(strings.Replace(osVersion, osKernel, "", 1))
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if deduped != "" {
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osVersion = deduped
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}
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}
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// Simplify kernel output: `MAJOR.MINOR.BUILD.REVISION Build BUILD.REVISION` -> `MAJOR.MINOR.BUILD.REVISION`
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match := regexp.MustCompile(`^(\d+\.\d+\.(\d+\.\d+)) Build (\d+\.\d+)$`).FindStringSubmatch(osKernel)
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if len(match) == 4 && match[2] == match[3] {
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osKernel = match[1]
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}
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}
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if osVersion != "" {
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// Include the friendly-name of the version, which is typically what is referred to.
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// Until Windows 10 version 2004 (May 2020) this can be found from registry entry
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// ReleaseID, after that we must use entry DisplayVersion (ReleaseId is stuck at 2009).
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// Source: https://ss64.com/nt/ver.html
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friendlyName := getRegistryVersionString("DisplayVersion")
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if friendlyName == "" {
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friendlyName = getRegistryVersionString("ReleaseId")
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}
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if friendlyName != "" {
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osVersion += " " + friendlyName
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}
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}
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if arch, err := host.KernelArch(); err == nil && arch != "" {
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if strings.HasSuffix(arch, "64") && osVersion != "" {
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osVersion += " (64 bit)"
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}
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if osKernel != "" {
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osKernel += " (" + arch + ")"
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}
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}
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return
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}
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var regVersionKeyUTF16 = windows.StringToUTF16Ptr(`SOFTWARE\Microsoft\Windows NT\CurrentVersion`)
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func getRegistryVersionString(name string) string {
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var (
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err error
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handle windows.Handle
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bufLen uint32
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valType uint32
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)
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err = windows.RegOpenKeyEx(windows.HKEY_LOCAL_MACHINE, regVersionKeyUTF16, 0, windows.KEY_READ|windows.KEY_WOW64_64KEY, &handle)
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if err != nil {
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return ""
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}
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defer func() {
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_ = windows.RegCloseKey(handle)
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}()
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nameUTF16 := windows.StringToUTF16Ptr(name)
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err = windows.RegQueryValueEx(handle, nameUTF16, nil, &valType, nil, &bufLen)
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if err != nil {
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return ""
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}
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regBuf := make([]uint16, bufLen/2+1)
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err = windows.RegQueryValueEx(handle, nameUTF16, nil, &valType, (*byte)(unsafe.Pointer(®Buf[0])), &bufLen)
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if err != nil {
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return ""
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}
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return windows.UTF16ToString(regBuf)
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}
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