29 lines
744 B
Go
29 lines
744 B
Go
|
// Copyright (c) 2016 Arista Networks, Inc.
|
||
|
|
// Use of this source code is governed by the Apache License 2.0
|
||
|
|
// that can be found in the COPYING file.
|
||
|
|
|
||
|
|
package netns
|
||
|
|
|
||
|
|
import "golang.org/x/sys/unix"
|
||
|
|
|
||
|
|
// close closes the file descriptor mapped to a network namespace
|
||
|
|
func (h nsHandle) close() error {
|
||
|
|
return unix.Close(int(h))
|
||
|
|
}
|
||
|
|
|
||
|
|
// fd returns the handle as a uintptr
|
||
|
|
func (h nsHandle) fd() int {
|
||
|
|
return int(h)
|
||
|
|
}
|
||
|
|
|
||
|
|
// getNs returns a file descriptor mapping to the given network namespace
|
||
|
|
var getNs = func(nsName string) (handle, error) {
|
||
|
|
fd, err := unix.Open(nsName, unix.O_RDONLY, 0)
|
||
|
|
return nsHandle(fd), err
|
||
|
|
}
|
||
|
|
|
||
|
|
// setNs sets the process's network namespace
|
||
|
|
var setNs = func(h handle) error {
|
||
|
|
return unix.Setns(h.fd(), unix.CLONE_NEWNET)
|
||
|
|
}
|