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|
package system
import (
"os"
"github.com/containers/common/pkg/completion"
"github.com/containers/podman/v2/cmd/podman/registry"
"github.com/containers/podman/v2/pkg/domain/entities"
"github.com/containers/podman/v2/pkg/rootless"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
var (
unshareDescription = "Runs a command in a modified user namespace."
unshareCommand = &cobra.Command{
Use: "unshare [COMMAND [ARG ...]]",
DisableFlagsInUseLine: true,
Short: "Run a command in a modified user namespace",
Long: unshareDescription,
RunE: unshare,
ValidArgsFunction: completion.AutocompleteDefault,
Example: `podman unshare id
podman unshare cat /proc/self/uid_map,
podman unshare podman-script.sh`,
}
)
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Mode: []entities.EngineMode{entities.ABIMode},
Command: unshareCommand,
})
flags := unshareCommand.Flags()
flags.SetInterspersed(false)
}
func unshare(cmd *cobra.Command, args []string) error {
if isRootless := rootless.IsRootless(); !isRootless {
return errors.Errorf("please use unshare with rootless")
}
// exec the specified command, if there is one
if len(args) < 1 {
// try to exec the shell, if one's set
shell, shellSet := os.LookupEnv("SHELL")
if !shellSet {
return errors.Errorf("no command specified and no $SHELL specified")
}
args = []string{shell}
}
return registry.ContainerEngine().Unshare(registry.Context(), args)
}
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