77 lines
2.0 KiB
Go
77 lines
2.0 KiB
Go
package main
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import (
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"os"
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"github.com/containers/libpod/cmd/podman/cliconfig"
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"github.com/containers/libpod/libpod/adapter"
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"github.com/containers/libpod/pkg/rootless"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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"github.com/spf13/cobra"
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)
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var (
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exportCommand cliconfig.ExportValues
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exportDescription = "Exports container's filesystem contents as a tar archive" +
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" and saves it on the local machine."
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_exportCommand = &cobra.Command{
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Use: "export",
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Short: "Export container's filesystem contents as a tar archive",
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Long: exportDescription,
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RunE: func(cmd *cobra.Command, args []string) error {
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exportCommand.InputArgs = args
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exportCommand.GlobalFlags = MainGlobalOpts
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return exportCmd(&exportCommand)
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},
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Example: `podman export ctrID > myCtr.tar
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podman export --output="myCtr.tar" ctrID`,
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}
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)
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func init() {
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exportCommand.Command = _exportCommand
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exportCommand.SetUsageTemplate(UsageTemplate())
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flags := exportCommand.Flags()
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flags.StringVarP(&exportCommand.Output, "output", "o", "/dev/stdout", "Write to a file, default is STDOUT")
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}
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// exportCmd saves a container to a tarball on disk
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func exportCmd(c *cliconfig.ExportValues) error {
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if os.Geteuid() != 0 {
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rootless.SetSkipStorageSetup(true)
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}
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runtime, err := adapter.GetRuntime(&c.PodmanCommand)
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if err != nil {
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return errors.Wrapf(err, "could not get runtime")
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}
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defer runtime.Shutdown(false)
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args := c.InputArgs
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if len(args) == 0 {
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return errors.Errorf("container id must be specified")
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}
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if len(args) > 1 {
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return errors.Errorf("too many arguments given, need 1 at most.")
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}
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output := c.Output
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if runtime.Remote && (output == "/dev/stdout" || len(output) == 0) {
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return errors.New("remote client usage must specify an output file (-o)")
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}
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if output == "/dev/stdout" {
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file := os.Stdout
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if logrus.IsTerminal(file) {
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return errors.Errorf("refusing to export to terminal. Use -o flag or redirect")
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}
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}
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if err := validateFileName(output); err != nil {
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return err
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}
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return runtime.Export(args[0], output)
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}
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