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umount.go
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umount.go
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package main
import (
"fmt"
"os"
"github.com/spf13/cobra"
"github.com/teemow/loopback/loop"
)
var (
umountCmd = &cobra.Command{
Use: "umount",
Short: "Unmount a loopback device",
Long: `Unmount a loopback device.
Unmount a loopback and then detach the device.
`,
Run: umountRun,
}
umountFlags struct {
name string
imagePath string
}
)
func init() {
umountCmd.Flags().StringVar(&umountFlags.name, "name", "", "Name of the volume")
umountCmd.Flags().StringVar(&umountFlags.imagePath, "image-path", "/var/lib/loopback", "Path for the loopback images")
}
func umountRun(cmd *cobra.Command, args []string) {
device, err := loop.Find(umountFlags.name, umountFlags.imagePath)
if err != nil {
fmt.Fprintf(os.Stderr, "Couldn't find loopback: %s\n", err)
os.Exit(1)
}
err = loop.Unmount(device)
if err != nil {
fmt.Fprintf(os.Stderr, "Couldn't unmount loopback: %s\n", err)
os.Exit(1)
}
err = loop.Detach(device)
if err != nil {
fmt.Fprintf(os.Stderr, "Couldn't detach loopback: %s\n", err)
os.Exit(1)
}
}