-
Notifications
You must be signed in to change notification settings - Fork 0
/
server.go
162 lines (142 loc) · 2.79 KB
/
server.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
153
154
155
156
157
158
159
160
161
162
package server
import (
"encoding/gob"
"fmt"
"log"
"net"
"os"
"os/signal"
"path"
"path/filepath"
"syscall"
)
func (s *Server) Bootstrap(basepath string) error {
var err error
s.basepath = basepath
s.modpath = path.Join(basepath, "modules")
s.socketpath = path.Join(basepath, "server.sock")
s.signalChan = make(chan os.Signal)
signal.Notify(s.signalChan)
err = s.OpenSocket()
if err != nil {
return err
}
err = s.FindModules()
if err != nil {
return err
}
err = s.LoadModules()
if err != nil {
return err
}
go s.PingModules()
return nil
}
func (s *Server) PingModules() {
log.Println("pinging")
conn, err := net.DialUnix("unix", nil, s.SocketAddress)
if err != nil {
log.Fatalf("Error when dialing for ping: %s\n", err.Error())
}
enc := gob.NewEncoder(conn)
err = enc.Encode(string("ping"))
if err != nil {
log.Fatalf("could not encode %s\n", err.Error())
}
var reply string
dec := gob.NewDecoder(conn)
err = dec.Decode(&reply)
if err != nil {
log.Fatalf("could not decode %s\n", err.Error())
}
log.Println(reply)
}
func (s *Server) FindModules() error {
log.Println("finding modules")
var err error
s.Modules, err = filepath.Glob(path.Join(s.modpath, "*"))
if err != nil {
return err
}
log.Println("found modules")
return nil
}
func (s *Server) LoadModules() error {
log.Println("loading modules")
var proc *ModuleProc
var attr *os.ProcAttr
var err error
for _, m := range s.Modules {
proc = new(ModuleProc)
attr = new(os.ProcAttr)
attr.Dir = m
attr.Env = append(
attr.Env,
fmt.Sprintf("REICON_SYSTEM_SOCKET=%s", s.socketpath),
)
proc.Process, err = os.StartProcess(
fmt.Sprintf("%s/mod_%s", m, path.Base(m)),
[]string{},
attr,
)
if err != nil {
return err
}
s.ModuleProcs = append(s.ModuleProcs, proc)
}
log.Println("loaded modules")
return nil
}
func (s *Server) OpenSocket() error {
s.SocketAddress = GetUnixAddress(s.basepath)
listen, err := net.ListenUnix("unix", s.SocketAddress)
if err != nil {
return err
}
s.SocketListen = listen
return nil
}
func (s *Server) CloseSocket() error {
if s.SocketListen != nil {
return s.SocketListen.Close()
}
return nil
}
func (s *Server) Run() {
go s.ListenSignal()
s.ListenUnixConnection()
}
func (s *Server) handleUnixConn(conn *net.UnixConn) {
var args []string
dec := gob.NewDecoder(conn)
dec.Decode(&args)
for _, a := range args {
log.Println(a)
}
conn.Close()
}
func (s *Server) ListenUnixConnection() {
for {
conn, err := s.SocketListen.AcceptUnix()
if err != nil {
continue
}
go s.handleUnixConn(conn)
}
}
func (s *Server) ListenSignal() {
var si os.Signal
for {
si = <-s.signalChan
switch si {
case syscall.SIGINT:
fallthrough
case syscall.SIGQUIT:
s.Shutdown()
}
}
}
func (s *Server) Shutdown() {
s.CloseSocket()
os.Exit(0)
}