/
inspect.go
61 lines (51 loc) · 1.74 KB
/
inspect.go
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// Copyright © 2019 NVIDIA Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package vdisc_cli
import (
"encoding/json"
"fmt"
"io"
"os"
"go.uber.org/zap"
"github.com/NVIDIA/vdisc/pkg/iso9660"
"github.com/NVIDIA/vdisc/pkg/vdisc"
)
type InspectCmd struct {
Url string `short:"u" help:"The URL of the vdisc" required:"true"`
}
func (cmd *InspectCmd) Run(globals *Globals) error {
v, err := vdisc.Load(cmd.Url, globalCache(&globals.Cache))
if err != nil {
zap.L().Fatal("loading vdisc", zap.Error(err))
}
defer v.Close()
fmt.Println("{")
fmt.Printf(" \"FsType\": %q,\n", v.FsType())
fmt.Printf(" \"BlockSize\": %d,\n", v.BlockSize())
if v.FsType() == "iso9660" {
fmt.Print(" \"PrimaryVolumeDescriptor\": ")
var pvd iso9660.PrimaryVolumeDescriptor
pvdSector := io.NewSectionReader(v.Image(), 16*iso9660.LogicalBlockSize, iso9660.LogicalBlockSize)
if err := iso9660.DecodePrimaryVolumeDescriptor(pvdSector, &pvd); err != nil {
zap.L().Fatal("decoding primary volume descriptor", zap.Error(err))
}
jenc := json.NewEncoder(os.Stdout)
jenc.SetIndent(" ", " ")
if err := jenc.Encode(&pvd); err != nil {
zap.L().Fatal("serializing primary volume descriptor", zap.Error(err))
}
}
fmt.Println("}")
return nil
}