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fork_server_nix.go
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fork_server_nix.go
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// Copyright 2015 Keybase, Inc. All rights reserved. Use of
// this source code is governed by the included BSD license.
// +build darwin dragonfly freebsd linux netbsd openbsd solaris
package client
import (
"fmt"
"os"
"syscall"
"github.com/keybase/client/go/libkb"
keybase1 "github.com/keybase/client/go/protocol"
)
func spawnServer(cl libkb.CommandLine, forkType keybase1.ForkType) (pid int, err error) {
var files []uintptr
var cmd string
var args []string
var devnull, log *os.File
defer func() {
if err != nil {
if devnull != nil {
devnull.Close()
}
if log != nil {
log.Close()
}
}
}()
if devnull, err = os.OpenFile("/dev/null", os.O_RDONLY, 0); err != nil {
return
}
files = append(files, devnull.Fd())
if G.Env.GetSplitLogOutput() {
files = append(files, uintptr(1), uintptr(2))
} else {
if _, log, err = libkb.OpenLogFile(); err != nil {
return
}
files = append(files, log.Fd(), log.Fd())
}
attr := syscall.ProcAttr{
Env: os.Environ(),
Sys: &syscall.SysProcAttr{Setsid: true},
Files: files,
}
cmd, args, err = makeServerCommandLine(cl, forkType)
if err != nil {
return
}
pid, err = syscall.ForkExec(cmd, args, &attr)
if err != nil {
err = fmt.Errorf("Error in ForkExec: %s", err)
} else {
G.Log.Info("Forking background server with pid=%d", pid)
}
return
}