51 lines
1.2 KiB
Go
51 lines
1.2 KiB
Go
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"os/exec"
|
|
"os/signal"
|
|
"syscall"
|
|
|
|
"github.com/rfjakob/gocryptfs/internal/tlog"
|
|
)
|
|
|
|
// The child sends us USR1 if the mount was successful
|
|
func exitOnUsr1() {
|
|
c := make(chan os.Signal, 1)
|
|
signal.Notify(c, syscall.SIGUSR1)
|
|
<-c
|
|
os.Exit(0)
|
|
}
|
|
|
|
// forkChild - execute ourselves once again, this time with the "-f" flag, and
|
|
// wait for SIGUSR1 or child exit.
|
|
// This is a workaround for the missing true fork function in Go.
|
|
func forkChild() int {
|
|
go exitOnUsr1()
|
|
name := os.Args[0]
|
|
newArgs := []string{"-f", fmt.Sprintf("-notifypid=%d", os.Getpid())}
|
|
newArgs = append(newArgs, os.Args[1:]...)
|
|
c := exec.Command(name, newArgs...)
|
|
c.Stdout = os.Stdout
|
|
c.Stderr = os.Stderr
|
|
c.Stdin = os.Stdin
|
|
err := c.Start()
|
|
if err != nil {
|
|
tlog.Fatal.Printf("forkChild: starting %s failed: %v\n", name, err)
|
|
return 1
|
|
}
|
|
err = c.Wait()
|
|
if err != nil {
|
|
if exiterr, ok := err.(*exec.ExitError); ok {
|
|
if waitstat, ok := exiterr.Sys().(syscall.WaitStatus); ok {
|
|
os.Exit(waitstat.ExitStatus())
|
|
}
|
|
}
|
|
tlog.Fatal.Printf("forkChild: wait returned an unknown error: %v\n", err)
|
|
return 1
|
|
}
|
|
// The child exited with 0 - let's do the same.
|
|
return 0
|
|
}
|