-
Notifications
You must be signed in to change notification settings - Fork 1
/
systemd.go
152 lines (136 loc) · 3.67 KB
/
systemd.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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
package web
import (
"crypto/tls"
"fmt"
"net"
"os"
"strconv"
"strings"
"syscall"
)
// ListenLoadFilesFdWithNames Загрузка файловых дескрипторов на основе переменных окружения
func (wsv *web) ListenLoadFilesFdWithNames() (ret []*os.File, err error) {
const (
listenFdBegin = 3
listenPID = `LISTEN_PID`
listenFds = `LISTEN_FDS`
listenFdNames = `LISTEN_FDNAMES`
listenFdPrefix = `LISTEN_FD_`
errPIDTpl = `getting pid from environment %q, error: %s`
errFDSTpl = `getting FD id from environment %q, error: %s`
)
var (
pID int
nFds int
names []string
name string
fd, offset int
)
if pID, err = strconv.Atoi(os.Getenv(listenPID)); err != nil {
err = fmt.Errorf(errPIDTpl, listenPID, err)
return
}
if nFds, err = strconv.Atoi(os.Getenv(listenFds)); err != nil {
err = fmt.Errorf(errFDSTpl, listenFds, err)
return
}
if pID != os.Getpid() {
err = ErrListenSystemdPID()
return
}
if nFds == 0 {
err = ErrListenSystemdFDS()
return
}
ret, names = make([]*os.File, 0, nFds), strings.Split(os.Getenv(listenFdNames), ":")
for fd = listenFdBegin; fd < listenFdBegin+nFds; fd++ {
syscall.CloseOnExec(fd)
name = listenFdPrefix + strconv.Itoa(fd)
if offset = fd - listenFdBegin; offset < len(names) && len(names[offset]) > 0 {
name = names[offset]
}
ret = append(ret, os.NewFile(uintptr(fd), name))
}
return
}
// ListenersSystemdWithoutNames returns a net.Listener for each matching socket type passed to this process
func (wsv *web) ListenersSystemdWithoutNames() (ret []net.Listener, err error) {
var (
file *os.File
files []*os.File
n int
pc net.Listener
)
files, err = wsv.ListenLoadFilesFdWithNames()
ret = make([]net.Listener, len(files))
for n, file = range files {
if pc, err = net.FileListener(file); err == nil {
ret[n], err = pc, file.Close()
}
}
return
}
// ListenersSystemdWithNames maps a listener name to a set of net.Listener instances
func (wsv *web) ListenersSystemdWithNames() (ret map[string][]net.Listener, err error) {
var (
file *os.File
files []*os.File
current []net.Listener
pc net.Listener
ok bool
)
files, err = wsv.ListenLoadFilesFdWithNames()
ret = make(map[string][]net.Listener)
for _, file = range files {
if pc, err = net.FileListener(file); err == nil {
if current, ok = ret[file.Name()]; !ok {
ret[file.Name()] = []net.Listener{pc}
} else {
ret[file.Name()] = append(current, pc)
}
err = file.Close()
}
}
return
}
// ListenersSystemdTLSWithoutNames returns a net.listener for each matching TCP socket type passed to this process
func (wsv *web) ListenersSystemdTLSWithoutNames(tlsConfig *tls.Config) (ret []net.Listener, err error) {
var (
listeners []net.Listener
l net.Listener
n int
)
if listeners, err = wsv.ListenersSystemdWithoutNames(); listeners == nil || err != nil {
return
}
if tlsConfig == nil {
err = ErrTLSIsNil()
return
}
for n, l = range listeners {
listeners[n] = tls.NewListener(l, tlsConfig)
}
return
}
// ListenersSystemdTLSWithNames maps a listener name to a net.Listener with the associated TLS configuration
func (wsv *web) ListenersSystemdTLSWithNames(tlsConfig *tls.Config) (ret map[string][]net.Listener, err error) {
var (
listeners map[string][]net.Listener
ll []net.Listener
l net.Listener
n int
)
if listeners, err = wsv.ListenersSystemdWithNames(); listeners == nil || err != nil {
return
}
if tlsConfig == nil {
err = ErrTLSIsNil()
return
}
for _, ll = range listeners {
for n, l = range ll {
ll[n] = tls.NewListener(l, tlsConfig)
}
}
return
}