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package osarch
import (
"errors"
"fmt"
"io/fs"
"os"
"strings"
"github.com/lxc/incus/v6/shared/util"
)
// GetOSRelease returns a map with Linux distribution information.
func GetOSRelease() (map[string]string, error) {
// Handle TrueNAS.
if util.PathExists("/usr/share/truenas") {
content, err := os.ReadFile("/etc/version")
if err == nil {
return map[string]string{
"NAME": "TrueNAS Scale",
"VERSION_ID": strings.TrimSpace(string(content)),
}, nil
}
}
// Add chromebook info
if util.PathExists("/run/cros_milestone") {
content, err := os.ReadFile("/run/cros_milestone")
if err == nil {
return map[string]string{
"NAME": "Chrome OS",
"VERSION_ID": strings.TrimSpace(string(content)),
}, nil
}
}
// Parse OS release files.
for _, osPath := range []string{"/etc/os-release", "/usr/lib/os-release"} {
osRelease, err := getOSRelease(osPath)
if err != nil {
if errors.Is(err, fs.ErrNotExist) {
continue
}
return nil, err
}
// Check if we have what we need.
if osRelease["IMAGE_ID"] != "" {
return map[string]string{
"NAME": osRelease["IMAGE_ID"],
"VERSION_ID": osRelease["IMAGE_VERSION"],
}, nil
}
if osRelease["NAME"] != "" {
return map[string]string{
"NAME": osRelease["NAME"],
"VERSION_ID": osRelease["VERSION_ID"],
}, nil
}
}
return map[string]string{}, nil
}
func getOSRelease(filename string) (map[string]string, error) {
osRelease := make(map[string]string)
data, err := os.ReadFile(filename)
if err != nil {
if errors.Is(err, fs.ErrNotExist) {
return osRelease, nil
}
return osRelease, err
}
for i, line := range strings.Split(string(data), "\n") {
if len(line) == 0 {
continue
}
if strings.HasPrefix(line, "#") {
continue
}
tokens := strings.SplitN(line, "=", 2)
if len(tokens) != 2 {
return osRelease, fmt.Errorf("%s: invalid format on line %d", filename, i+1)
}
osRelease[tokens[0]] = strings.Trim(tokens[1], `'"`)
}
return osRelease, nil
}
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