rclone/cmd/serve/docker/unix.go

60 lines
1.2 KiB
Go
Raw Normal View History

2021-09-09 14:25:25 +02:00
//go:build linux || freebsd
// +build linux freebsd
package docker
import (
"fmt"
"net"
"os"
"path/filepath"
"github.com/rclone/rclone/lib/file"
)
func newUnixListener(path string, gid int) (net.Listener, string, error) {
// try systemd socket activation
fds := systemdActivationFiles()
switch len(fds) {
case 0:
// fall thru
case 1:
listener, err := net.FileListener(fds[0])
return listener, "", err
default:
return nil, "", fmt.Errorf("expected only one socket from systemd, got %d", len(fds))
}
// create socket ourselves
if filepath.Ext(path) == "" {
path += ".sock"
}
if !filepath.IsAbs(path) {
path = filepath.Join(sockDir, path)
}
if err := file.MkdirAll(filepath.Dir(path), 0755); err != nil {
return nil, "", err
}
if err := os.Remove(path); err != nil && !os.IsNotExist(err) {
return nil, "", err
}
listener, err := net.Listen("unix", path)
if err != nil {
return nil, "", err
}
if err = os.Chmod(path, 0660); err != nil {
return nil, "", err
}
if os.Geteuid() == 0 {
if err = os.Chown(path, 0, gid); err != nil {
return nil, "", err
}
}
// we don't use spec file with unix sockets
return listener, path, nil
}