From 1074a02ff85bb9f1d0db3e4468b067a6516b1521 Mon Sep 17 00:00:00 2001
From: Brent Baude <bbaude@redhat.com>
Date: Fri, 8 May 2020 13:09:11 -0500
Subject: v2 podman unshare command

add unshare command

add cp and init to container sub-command

allow mount to run as rootless

Signed-off-by: Brent Baude <bbaude@redhat.com>
---
 cmd/podman/system/unshare.go | 50 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 cmd/podman/system/unshare.go

(limited to 'cmd/podman/system/unshare.go')

diff --git a/cmd/podman/system/unshare.go b/cmd/podman/system/unshare.go
new file mode 100644
index 000000000..7db5d36d2
--- /dev/null
+++ b/cmd/podman/system/unshare.go
@@ -0,0 +1,50 @@
+package system
+
+import (
+	"os"
+
+	"github.com/containers/libpod/cmd/podman/registry"
+	"github.com/containers/libpod/pkg/domain/entities"
+	"github.com/containers/libpod/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 [flags] [COMMAND [ARG]]",
+		Short: "Run a command in a modified user namespace",
+		Long:  unshareDescription,
+		RunE:  unshare,
+		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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