-
-
Notifications
You must be signed in to change notification settings - Fork 54
/
fork.go
32 lines (30 loc) · 903 Bytes
/
fork.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
package immortal
import (
"os"
"os/exec"
"syscall"
)
// Fork crete a new process
func Fork() (int, error) {
args := os.Args[1:]
cmd := exec.Command(os.Args[0], args...)
cmd.Env = os.Environ()
cmd.Stdin = nil
cmd.Stdout = nil
cmd.Stderr = nil
cmd.ExtraFiles = nil
cmd.SysProcAttr = &syscall.SysProcAttr{
// Setsid is used to detach the process from the parent (normally a shell)
//
// The disowning of a child process is accomplished by executing the system call
// setpgrp() or setsid(), (both of which have the same functionality) as soon as
// the child is forked. These calls create a new process session group, make the
// child process the session leader, and set the process group ID to the process
// ID of the child. https://bsdmag.org/unix-kernel-system-calls/
Setsid: true,
}
if err := cmd.Start(); err != nil {
return 0, err
}
return cmd.Process.Pid, nil
}