mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-12-29 13:59:15 -05:00
f067e12859
* Only attempt to kill parent once * Apply suggestions from code review Co-Authored-By: guillep2k <18600385+guillep2k@users.noreply.github.com> * Add waitgroup for running servers
85 lines
2.2 KiB
Go
85 lines
2.2 KiB
Go
// +build !windows
|
|
|
|
// Copyright 2019 The Gitea Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
// This code is heavily inspired by the archived gofacebook/gracenet/net.go handler
|
|
|
|
package graceful
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"os/exec"
|
|
"strings"
|
|
"sync"
|
|
"syscall"
|
|
)
|
|
|
|
var killParent sync.Once
|
|
|
|
// KillParent sends the kill signal to the parent process if we are a child
|
|
func KillParent() {
|
|
killParent.Do(func() {
|
|
if IsChild {
|
|
ppid := syscall.Getppid()
|
|
if ppid > 1 {
|
|
_ = syscall.Kill(ppid, syscall.SIGTERM)
|
|
}
|
|
}
|
|
})
|
|
}
|
|
|
|
// RestartProcess starts a new process passing it the active listeners. It
|
|
// doesn't fork, but starts a new process using the same environment and
|
|
// arguments as when it was originally started. This allows for a newly
|
|
// deployed binary to be started. It returns the pid of the newly started
|
|
// process when successful.
|
|
func RestartProcess() (int, error) {
|
|
listeners := getActiveListeners()
|
|
|
|
// Extract the fds from the listeners.
|
|
files := make([]*os.File, len(listeners))
|
|
for i, l := range listeners {
|
|
var err error
|
|
// Now, all our listeners actually have File() functions so instead of
|
|
// individually casting we just use a hacky interface
|
|
files[i], err = l.(filer).File()
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
// Remember to close these at the end.
|
|
defer files[i].Close()
|
|
}
|
|
|
|
// Use the original binary location. This works with symlinks such that if
|
|
// the file it points to has been changed we will use the updated symlink.
|
|
argv0, err := exec.LookPath(os.Args[0])
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
// Pass on the environment and replace the old count key with the new one.
|
|
var env []string
|
|
for _, v := range os.Environ() {
|
|
if !strings.HasPrefix(v, listenFDs+"=") {
|
|
env = append(env, v)
|
|
}
|
|
}
|
|
env = append(env, fmt.Sprintf("%s=%d", listenFDs, len(listeners)))
|
|
|
|
allFiles := append([]*os.File{os.Stdin, os.Stdout, os.Stderr}, files...)
|
|
process, err := os.StartProcess(argv0, os.Args, &os.ProcAttr{
|
|
Dir: originalWD,
|
|
Env: env,
|
|
Files: allFiles,
|
|
})
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return process.Pid, nil
|
|
}
|
|
|
|
type filer interface {
|
|
File() (*os.File, error)
|
|
}
|