mirror of
https://github.com/containers/podman.git
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4d895dcb54
add the ability to attach to a running container. the tunnel side of this is not enabled yet as we have work on the endpoints and plumbing to do yet. add the ability to exec a command in a running container. the tunnel side is also being deferred for same reason. Signed-off-by: Brent Baude <bbaude@redhat.com>
94 lines
3.3 KiB
Go
94 lines
3.3 KiB
Go
package containers
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import (
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"bufio"
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"os"
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"github.com/containers/libpod/cmd/podmanV2/common"
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"github.com/containers/libpod/cmd/podmanV2/registry"
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"github.com/containers/libpod/pkg/domain/entities"
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envLib "github.com/containers/libpod/pkg/env"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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)
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var (
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execDescription = `Execute the specified command inside a running container.
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`
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execCommand = &cobra.Command{
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Use: "exec [flags] CONTAINER [COMMAND [ARG...]]",
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Short: "Run a process in a running container",
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Long: execDescription,
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PreRunE: preRunE,
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RunE: exec,
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Example: `podman exec -it ctrID ls
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podman exec -it -w /tmp myCtr pwd
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podman exec --user root ctrID ls`,
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}
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)
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var (
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envInput, envFile []string
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execOpts entities.ExecOptions
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)
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func init() {
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registry.Commands = append(registry.Commands, registry.CliCommand{
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Mode: []entities.EngineMode{entities.ABIMode},
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Command: execCommand,
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})
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flags := execCommand.Flags()
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flags.SetInterspersed(false)
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flags.StringVar(&execOpts.DetachKeys, "detach-keys", common.GetDefaultDetachKeys(), "Select the key sequence for detaching a container. Format is a single character [a-Z] or ctrl-<value> where <value> is one of: a-z, @, ^, [, , or _")
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flags.StringArrayVarP(&envInput, "env", "e", []string{}, "Set environment variables")
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flags.StringSliceVar(&envFile, "env-file", []string{}, "Read in a file of environment variables")
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flags.BoolVarP(&execOpts.Interactive, "interactive", "i", false, "Keep STDIN open even if not attached")
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flags.BoolVarP(&execOpts.Latest, "latest", "l", false, "Act on the latest container podman is aware of")
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flags.BoolVar(&execOpts.Privileged, "privileged", false, "Give the process extended Linux capabilities inside the container. The default is false")
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flags.BoolVarP(&execOpts.Tty, "tty", "t", false, "Allocate a pseudo-TTY. The default is false")
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flags.StringVarP(&execOpts.User, "user", "u", "", "Sets the username or UID used and optionally the groupname or GID for the specified command")
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flags.UintVar(&execOpts.PreserveFDs, "preserve-fds", 0, "Pass N additional file descriptors to the container")
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flags.StringVarP(&execOpts.WorkDir, "workdir", "w", "", "Working directory inside the container")
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if registry.IsRemote() {
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_ = flags.MarkHidden("latest")
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_ = flags.MarkHidden("preserve-fds")
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}
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}
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func exec(cmd *cobra.Command, args []string) error {
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var nameOrId string
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execOpts.Cmd = args
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if !execOpts.Latest {
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execOpts.Cmd = args[1:]
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nameOrId = args[0]
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}
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// Validate given environment variables
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execOpts.Envs = make(map[string]string)
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for _, f := range envFile {
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fileEnv, err := envLib.ParseFile(f)
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if err != nil {
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return err
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}
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execOpts.Envs = envLib.Join(execOpts.Envs, fileEnv)
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}
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cliEnv, err := envLib.ParseSlice(envInput)
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if err != nil {
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return errors.Wrap(err, "error parsing environment variables")
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}
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execOpts.Envs = envLib.Join(execOpts.Envs, cliEnv)
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execOpts.Streams.OutputStream = os.Stdout
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execOpts.Streams.ErrorStream = os.Stderr
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if execOpts.Interactive {
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execOpts.Streams.InputStream = bufio.NewReader(os.Stdin)
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execOpts.Streams.AttachInput = true
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}
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execOpts.Streams.AttachOutput = true
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execOpts.Streams.AttachError = true
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exitCode, err := registry.ContainerEngine().ContainerExec(registry.GetContext(), nameOrId, execOpts)
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registry.SetExitCode(exitCode)
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return err
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}
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