github.com/containers/libpod@v1.9.4-0.20220419124438-4284fd425507/cmd/podman/umount.go (about)

     1  package main
     2  
     3  import (
     4  	"github.com/containers/libpod/cmd/podman/cliconfig"
     5  	"github.com/containers/libpod/pkg/adapter"
     6  	"github.com/pkg/errors"
     7  	"github.com/spf13/cobra"
     8  )
     9  
    10  var (
    11  	umountCommand cliconfig.UmountValues
    12  
    13  	description = `Container storage increments a mount counter each time a container is mounted.
    14  
    15    When a container is unmounted, the mount counter is decremented. The container's root filesystem is physically unmounted only when the mount counter reaches zero indicating no other processes are using the mount.
    16  
    17    An unmount can be forced with the --force flag.
    18  `
    19  	_umountCommand = &cobra.Command{
    20  		Use:     "umount [flags] CONTAINER [CONTAINER...]",
    21  		Aliases: []string{"unmount"},
    22  		Short:   "Unmounts working container's root filesystem",
    23  		Long:    description,
    24  		RunE: func(cmd *cobra.Command, args []string) error {
    25  			umountCommand.InputArgs = args
    26  			umountCommand.GlobalFlags = MainGlobalOpts
    27  			umountCommand.Remote = remoteclient
    28  			return umountCmd(&umountCommand)
    29  		},
    30  		Args: func(cmd *cobra.Command, args []string) error {
    31  			return checkAllLatestAndCIDFile(cmd, args, false, false)
    32  		},
    33  		Example: `podman umount ctrID
    34    podman umount ctrID1 ctrID2 ctrID3
    35    podman umount --all`,
    36  	}
    37  )
    38  
    39  func init() {
    40  	umountCommand.Command = _umountCommand
    41  	umountCommand.SetHelpTemplate(HelpTemplate())
    42  	umountCommand.SetUsageTemplate(UsageTemplate())
    43  	flags := umountCommand.Flags()
    44  	flags.BoolVarP(&umountCommand.All, "all", "a", false, "Umount all of the currently mounted containers")
    45  	flags.BoolVarP(&umountCommand.Force, "force", "f", false, "Force the complete umount all of the currently mounted containers")
    46  	flags.BoolVarP(&umountCommand.Latest, "latest", "l", false, "Act on the latest container podman is aware of")
    47  	markFlagHiddenForRemoteClient("latest", flags)
    48  }
    49  
    50  func umountCmd(c *cliconfig.UmountValues) error {
    51  	runtime, err := adapter.GetRuntime(getContext(), &c.PodmanCommand)
    52  	if err != nil {
    53  		return errors.Wrapf(err, "error creating runtime")
    54  	}
    55  	defer runtime.DeferredShutdown(false)
    56  
    57  	ok, failures, err := runtime.UmountRootFilesystems(getContext(), c)
    58  	if err != nil {
    59  		return err
    60  	}
    61  	return printCmdResults(ok, failures)
    62  }