107 lines
2.9 KiB
Go
107 lines
2.9 KiB
Go
package main
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import (
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"fmt"
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"github.com/containers/libpod/cmd/podman/cliconfig"
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"github.com/spf13/cobra"
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"os"
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"github.com/containers/libpod/cmd/podman/libpodruntime"
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"github.com/containers/libpod/libpod"
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"github.com/containers/libpod/pkg/rootless"
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"github.com/pkg/errors"
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)
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var (
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execCommand cliconfig.ExecValues
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execDescription = `
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podman exec
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Run a command in a running container
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`
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_execCommand = &cobra.Command{
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Use: "exec",
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Short: "Run a process in a running container",
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Long: execDescription,
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RunE: func(cmd *cobra.Command, args []string) error {
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execCommand.InputArgs = args
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execCommand.GlobalFlags = MainGlobalOpts
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return execCmd(&execCommand)
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},
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Example: "CONTAINER-NAME",
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}
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)
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func init() {
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execCommand.Command = _execCommand
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flags := execCommand.Flags()
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flags.SetInterspersed(false)
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flags.StringSliceVarP(&execCommand.Env, "env", "e", []string{}, "Set environment variables")
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flags.BoolVarP(&execCommand.Interfactive, "interactive", "i", false, "Not supported. All exec commands are interactive by default")
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flags.BoolVarP(&execCommand.Latest, "latest", "l", false, "Act on the latest container podman is aware of")
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flags.BoolVar(&execCommand.Privileged, "privileged", false, "Give the process extended Linux capabilities inside the container. The default is false")
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flags.BoolVarP(&execCommand.Tty, "tty", "t", false, "Allocate a pseudo-TTY. The default is false")
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flags.StringVarP(&execCommand.User, "user", "u", "", "Sets the username or UID used and optionally the groupname or GID for the specified command")
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flags.StringVarP(&execCommand.Workdir, "workdir", "w", "", "Working directory inside the container")
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}
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func execCmd(c *cliconfig.ExecValues) error {
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args := c.InputArgs
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var ctr *libpod.Container
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var err error
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argStart := 1
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if len(args) < 1 && !c.Latest {
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return errors.Errorf("you must provide one container name or id")
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}
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if len(args) < 2 && !c.Latest {
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return errors.Errorf("you must provide a command to exec")
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}
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if c.Latest {
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argStart = 0
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}
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rootless.SetSkipStorageSetup(true)
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cmd := args[argStart:]
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runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand)
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if err != nil {
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return errors.Wrapf(err, "error creating libpod runtime")
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}
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defer runtime.Shutdown(false)
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if c.Latest {
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ctr, err = runtime.GetLatestContainer()
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} else {
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ctr, err = runtime.LookupContainer(args[0])
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}
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if err != nil {
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return errors.Wrapf(err, "unable to exec into %s", args[0])
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}
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pid, err := ctr.PID()
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if err != nil {
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return err
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}
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became, ret, err := rootless.JoinNS(uint(pid))
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if err != nil {
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return err
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}
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if became {
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os.Exit(ret)
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}
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// ENVIRONMENT VARIABLES
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env := map[string]string{}
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if err := readKVStrings(env, []string{}, c.Env); err != nil {
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return errors.Wrapf(err, "unable to process environment variables")
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}
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envs := []string{}
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for k, v := range env {
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envs = append(envs, fmt.Sprintf("%s=%s", k, v))
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}
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return ctr.Exec(c.Tty, c.Privileged, envs, cmd, c.User, c.Workdir)
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}
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