41 lines
856 B
Go
41 lines
856 B
Go
package main
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import (
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"log"
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"github.com/codegangsta/cli"
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"github.com/docker/libcontainer/namespaces"
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)
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var nsenterCommand = cli.Command{
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Name: "nsenter",
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Usage: "init process for entering an existing namespace",
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Action: nsenterAction,
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Flags: []cli.Flag{
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cli.IntFlag{Name: "nspid"},
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cli.StringFlag{Name: "containerjson"},
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},
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}
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func nsenterAction(context *cli.Context) {
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args := context.Args()
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if len(args) == 0 {
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args = []string{"/bin/bash"}
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}
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container, err := loadContainerFromJson(context.String("containerjson"))
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if err != nil {
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log.Fatalf("unable to load container: %s", err)
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}
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nspid := context.Int("nspid")
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if nspid <= 0 {
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log.Fatalf("cannot enter into namespaces without valid pid: %q", nspid)
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}
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if err := namespaces.NsEnter(container, nspid, args); err != nil {
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log.Fatalf("failed to nsenter: %s", err)
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}
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}
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