1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
//go:build !windows
// +build !windows
package tzlocal
import (
"fmt"
"os"
"path"
)
const localZoneFile = "/etc/localtime" // symlinked file - set by OS
func inferFromPath(p string) (string, error) {
var name string
var err error
dir, lname := path.Split(p)
if len(dir) == 0 || len(lname) == 0 {
err = fmt.Errorf("cannot infer timezone name from path: %q", p)
return name, err
}
_, fname := path.Split(dir[:len(dir)-1])
if fname == "zoneinfo" {
name = lname // e.g. /usr/share/zoneinfo/Japan
} else {
name = fname + string(os.PathSeparator) + lname // e.g. /usr/share/zoneinfo/Asia/Tokyo
}
return name, err
}
// LocalTZ will run `/etc/localtime` and get the timezone from the resulting value `/usr/share/zoneinfo/America/New_York`
func LocalTZ() (string, error) {
var name string
fi, err := os.Lstat(localZoneFile)
if err != nil {
err = fmt.Errorf("failed to stat %q: %w", localZoneFile, err)
return name, err
}
if (fi.Mode() & os.ModeSymlink) == 0 {
err = fmt.Errorf("%q is not a symlink - cannot infer name", localZoneFile)
return name, err
}
p, err := os.Readlink(localZoneFile)
if err != nil {
return name, err
}
// handles 1 & 2 part zone names
name, err = inferFromPath(p)
return name, err
}
|
