1package internal
 2
 3import (
 4	"bytes"
 5	"fmt"
 6	"strings"
 7	"syscall"
 8)
 9
10func cleanNulls(s string) string {
11	return strings.TrimFunc(s, func(r rune) bool {
12		return r == 0
13	})
14}
15
16// Gets the name of the kernel using uname.
17// It returns the given kernel name and any errors it encounters.
18func GetKernelName(uname syscall.Utsname) (string, error) {
19	var b bytes.Buffer
20	for _, v := range uname.Sysname {
21		if err := b.WriteByte(byte(v)); err != nil {
22			return "", fmt.Errorf("failed to write kernel name to buffer: %v", err)
23		}
24	}
25	return cleanNulls(b.String()), nil
26}
27
28// Gets the version of the kernel using uname.
29// It returns the given kernel version and any errors it encounters.
30func GetKernelRelease(uname syscall.Utsname) (string, error) {
31	var b bytes.Buffer
32	for _, v := range uname.Release {
33		if err := b.WriteByte(byte(v)); err != nil {
34			return "", fmt.Errorf("failed to write kernel release to buffer: %v", err)
35		}
36	}
37	return cleanNulls(b.String()), nil
38}
39
40// Gets the machine's architecture using uname.
41// It returns the given architecture and any errors it encounters.
42func GetMachineArch(uname syscall.Utsname) (string, error) {
43	var b bytes.Buffer
44	for _, v := range uname.Machine {
45		if err := b.WriteByte(byte(v)); err != nil {
46			return "", fmt.Errorf("failed to write machine to buffer: %v", err)
47		}
48	}
49	return cleanNulls(b.String()), nil
50}
51
52// Gets the machine's name using uname.
53// It returns the given machine's name and any errors it encounters.
54func GetNodename(uname syscall.Utsname) (string, error) {
55	var b bytes.Buffer
56	for _, v := range uname.Nodename {
57		if err := b.WriteByte(byte(v)); err != nil {
58			return "", fmt.Errorf("failed to write node name to buffer: %v", err)
59		}
60	}
61	return cleanNulls(b.String()), nil
62}