-
Notifications
You must be signed in to change notification settings - Fork 0
/
flags.go
78 lines (65 loc) · 1.63 KB
/
flags.go
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
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
package main
import (
"flag"
"fmt"
"log/slog"
"net"
"net/url"
"os"
"path"
"strings"
)
var logLevel = flag.String("log-level", "info", "log level")
var listenAddr = flag.String("listen-addr", "/run/systemd/cri/cri.sock", "address to listen on")
var stateDir = flag.String("state-dir", "/var/lib/systemd/cri", "directory to store state")
var version = flag.Bool("version", false, "Print version and exit")
func init() {
flag.Parse()
var level slog.Level
if err := level.UnmarshalText([]byte(*logLevel)); err != nil {
slog.Error("error parsing log level", "error", err)
os.Exit(1)
}
handler := slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{Level: level})
slog.SetDefault(slog.New(handler))
if sd, ok := os.LookupEnv("STATE_DIRECTORY"); *stateDir == "" && ok {
*stateDir = sd
}
if err := os.MkdirAll(*stateDir, 0755); err != nil {
slog.Error("error creating state directory", "error", err)
os.Exit(1)
}
}
func listen() (net.Listener, error) {
if *listenAddr == "" {
return nil, nil
}
addr, err := url.Parse(*listenAddr)
if err != nil {
return nil, err
}
network := "unix"
address := path.Join(addr.Host, addr.Path)
switch addr.Scheme {
case "unix":
case "tcp":
network = "tcp"
address = addr.Host
case "":
if strings.Contains(addr.Path, ":") {
network = "tcp"
address = addr.Path
}
default:
return nil, fmt.Errorf("unsupported scheme %s", addr.Scheme)
}
if network == "unix" {
if err := os.Remove(address); err != nil && !os.IsNotExist(err) {
return nil, err
}
if err := os.MkdirAll(path.Dir(address), 0755); err != nil {
return nil, err
}
}
return net.Listen(network, address)
}