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delete.go
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delete.go
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// Copyright © 2015-2016 Platina Systems, Inc. All rights reserved.
// Use of this source code is governed by the GPL-2 license described in the
// LICENSE file.
package delete
import (
"fmt"
"io/ioutil"
"path/filepath"
"strings"
"syscall"
"github.com/platinasystems/goes/cmd/ip/internal/options"
"github.com/platinasystems/goes/lang"
"github.com/platinasystems/goes/internal/netns"
"github.com/platinasystems/goes/internal/nl/rtnl"
)
type Command struct{}
func (Command) String() string { return "delete" }
func (Command) Usage() string {
return `ip netns delete [ -all | NETNSNAME ]`
}
func (Command) Apropos() lang.Alt {
return lang.Alt{
lang.EnUS: "remove network namespace",
}
}
func (Command) Man() lang.Alt {
return lang.Alt{
lang.EnUS: `
SEE ALSO
ip man netns || ip netns -man
man ip || ip -man`,
}
}
func (Command) Main(args ...string) error {
opt, args := options.New(args)
switch {
case opt.Flags.ByName["-all"]:
if len(args) > 0 {
return fmt.Errorf("%v: unexpected", args)
}
varRunNetns, err := ioutil.ReadDir(rtnl.VarRunNetns)
if err != nil {
return err
}
for _, fi := range varRunNetns {
if err := del(fi.Name()); err != nil {
return err
}
}
case len(args) == 0:
return fmt.Errorf("NETNSNAME: missing")
case len(args) == 1:
return del(args[0])
default:
return fmt.Errorf("%v: unexpected", args[1:])
}
return nil
}
func (Command) Complete(args ...string) (list []string) {
var larg string
n := len(args)
if n > 0 {
larg = args[n-1]
}
for _, name := range []string{
"-all",
} {
if strings.HasPrefix(name, larg) {
list = append(list, name)
}
}
if len(list) == 0 {
list = netns.CompleteName(larg)
}
return
}
func del(name string) error {
fn := filepath.Join(rtnl.VarRunNetns, name)
if err := syscall.Unmount(fn, syscall.MNT_DETACH); err != nil {
return err
}
return syscall.Unlink(fn)
}