Merge pull request #7085 from rhatdan/cmount

Cleanup handling of podman mount/unmount

4 files changed, 49 insertions, 30 deletions

diff --git a/cmd/podman/containers/mount.go b/cmd/podman/containers/mount.go
index 186c4df16..b578daa49 100644
--- a/cmd/podman/containers/mount.go
+++ b/cmd/podman/containers/mount.go
@@ -10,6 +10,7 @@ import (
 	"github.com/containers/libpod/v2/cmd/podman/utils"
 	"github.com/containers/libpod/v2/cmd/podman/validate"
 	"github.com/containers/libpod/v2/pkg/domain/entities"
+	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
 )
@@ -31,7 +32,8 @@ var (
 			return validate.CheckAllLatestAndCIDFile(cmd, args, true, false)
 		},
 		Annotations: map[string]string{
-			registry.ParentNSRequired: "",
+			registry.UnshareNSRequired: "",
+			registry.ParentNSRequired:  "",
 		},
 	}
 
@@ -51,7 +53,7 @@ var (
 
 func mountFlags(flags *pflag.FlagSet) {
 	flags.BoolVarP(&mountOpts.All, "all", "a", false, "Mount all containers")
-	flags.StringVar(&mountOpts.Format, "format", "", "Change the output format to Go template")
+	flags.StringVar(&mountOpts.Format, "format", "", "Print the mounted containers in specified format (json)")
 	flags.BoolVar(&mountOpts.NoTruncate, "notruncate", false, "Do not truncate output")
 }
 
@@ -90,14 +92,21 @@ func mount(_ *cobra.Command, args []string) error {
 		}
 		return errs.PrintErrors()
 	}
-	if mountOpts.Format == "json" {
+
+	switch mountOpts.Format {
+	case "json":
 		return printJSON(reports)
+	case "":
+		// do nothing
+	default:
+		return errors.Errorf("unknown --format argument: %s", mountOpts.Format)
 	}
+
 	mrs := make([]mountReporter, 0, len(reports))
 	for _, r := range reports {
 		mrs = append(mrs, mountReporter{r})
 	}
-	row := "{{.ID}} {{.Path}}"
+	row := "{{.ID}} {{.Path}}\n"
 	format := "{{range . }}" + row + "{{end}}"
 	tmpl, err := template.New("mounts").Parse(format)
 	if err != nil {
diff --git a/cmd/podman/containers/unmount.go b/cmd/podman/containers/unmount.go
index c40c2be7e..6556a6510 100644
--- a/cmd/podman/containers/unmount.go
+++ b/cmd/podman/containers/unmount.go
@@ -18,31 +18,32 @@ var (
 
   An unmount can be forced with the --force flag.
 `
-	umountCommand = &cobra.Command{
-		Use:     "umount [flags] CONTAINER [CONTAINER...]",
-		Aliases: []string{"unmount"},
+	unmountCommand = &cobra.Command{
+		Use:     "unmount [flags] CONTAINER [CONTAINER...]",
+		Aliases: []string{"umount"},
 		Short:   "Unmounts working container's root filesystem",
 		Long:    description,
 		RunE:    unmount,
 		Args: func(cmd *cobra.Command, args []string) error {
 			return validate.CheckAllLatestAndCIDFile(cmd, args, false, false)
 		},
-		Example: `podman umount ctrID
-  podman umount ctrID1 ctrID2 ctrID3
-  podman umount --all`,
+		Example: `podman unmount ctrID
+  podman unmount ctrID1 ctrID2 ctrID3
+  podman unmount --all`,
 	}
 
 	containerUnmountCommand = &cobra.Command{
-		Use:   umountCommand.Use,
-		Short: umountCommand.Short,
-		Long:  umountCommand.Long,
-		RunE:  umountCommand.RunE,
+		Use:     unmountCommand.Use,
+		Short:   unmountCommand.Short,
+		Aliases: unmountCommand.Aliases,
+		Long:    unmountCommand.Long,
+		RunE:    unmountCommand.RunE,
 		Args: func(cmd *cobra.Command, args []string) error {
 			return validate.CheckAllLatestAndCIDFile(cmd, args, false, false)
 		},
-		Example: `podman container umount ctrID
-  podman container umount ctrID1 ctrID2 ctrID3
-  podman container umount --all`,
+		Example: `podman container unmount ctrID
+  podman container unmount ctrID1 ctrID2 ctrID3
+  podman container unmount --all`,
 	}
 )
 
@@ -50,25 +51,25 @@ var (
 	unmountOpts entities.ContainerUnmountOptions
 )
 
-func umountFlags(flags *pflag.FlagSet) {
-	flags.BoolVarP(&unmountOpts.All, "all", "a", false, "Umount all of the currently mounted containers")
-	flags.BoolVarP(&unmountOpts.Force, "force", "f", false, "Force the complete umount all of the currently mounted containers")
+func unmountFlags(flags *pflag.FlagSet) {
+	flags.BoolVarP(&unmountOpts.All, "all", "a", false, "Unmount all of the currently mounted containers")
+	flags.BoolVarP(&unmountOpts.Force, "force", "f", false, "Force the complete unmount of the specified mounted containers")
 }
 
 func init() {
 	registry.Commands = append(registry.Commands, registry.CliCommand{
 		Mode:    []entities.EngineMode{entities.ABIMode},
-		Command: umountCommand,
+		Command: unmountCommand,
 	})
-	umountFlags(umountCommand.Flags())
-	validate.AddLatestFlag(umountCommand, &unmountOpts.Latest)
+	unmountFlags(unmountCommand.Flags())
+	validate.AddLatestFlag(unmountCommand, &unmountOpts.Latest)
 
 	registry.Commands = append(registry.Commands, registry.CliCommand{
 		Mode:    []entities.EngineMode{entities.ABIMode},
 		Command: containerUnmountCommand,
 		Parent:  containerCmd,
 	})
-	umountFlags(containerUnmountCommand.Flags())
+	unmountFlags(containerUnmountCommand.Flags())
 	validate.AddLatestFlag(containerUnmountCommand, &unmountOpts.Latest)
 }
 
diff --git a/cmd/podman/main.go b/cmd/podman/main.go
index f46f74547..d0e89c2f5 100644
--- a/cmd/podman/main.go
+++ b/cmd/podman/main.go
@@ -40,13 +40,21 @@ func main() {
 		for _, m := range c.Mode {
 			if cfg.EngineMode == m {
 				// Command cannot be run rootless
-				_, found := c.Command.Annotations[registry.ParentNSRequired]
-				if rootless.IsRootless() && found {
-					c.Command.RunE = func(cmd *cobra.Command, args []string) error {
-						return fmt.Errorf("cannot run command %q in rootless mode", cmd.CommandPath())
+				_, found := c.Command.Annotations[registry.UnshareNSRequired]
+				if found {
+					if rootless.IsRootless() && found && os.Getuid() != 0 {
+						c.Command.RunE = func(cmd *cobra.Command, args []string) error {
+							return fmt.Errorf("cannot run command %q in rootless mode, must execute `podman unshare` first", cmd.CommandPath())
+						}
+					}
+				} else {
+					_, found = c.Command.Annotations[registry.ParentNSRequired]
+					if rootless.IsRootless() && found {
+						c.Command.RunE = func(cmd *cobra.Command, args []string) error {
+							return fmt.Errorf("cannot run command %q in rootless mode", cmd.CommandPath())
+						}
 					}
 				}
-
 				parent := rootCmd
 				if c.Parent != nil {
 					parent = c.Parent
diff --git a/cmd/podman/registry/config.go b/cmd/podman/registry/config.go
index f5a231172..a62a41c12 100644
--- a/cmd/podman/registry/config.go
+++ b/cmd/podman/registry/config.go
@@ -15,7 +15,8 @@ import (
 )
 
 const (
-	ParentNSRequired = "ParentNSRequired"
+	ParentNSRequired  = "ParentNSRequired"
+	UnshareNSRequired = "UnshareNSRequired"
 )
 
 var (