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dump_index.go
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dump_index.go
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/*
* btrfscue version 0.4
* Copyright (c)2011-2017 Christian Blichmann
*
* Sub-command to dump the index contents.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package main
import (
"flag"
"fmt"
_ "blichmann.eu/code/btrfscue/btrfs"
"blichmann.eu/code/btrfscue/btrfs/index"
"blichmann.eu/code/btrfscue/subcommand"
)
type dumpIndexCommand struct {
}
func (c *dumpIndexCommand) DefineFlags(fs *flag.FlagSet) {
}
func (c *dumpIndexCommand) Run(args []string) {
if len(args) > 0 {
fatalf("extra operand: %s\n", args[0])
}
if len(*metadata) == 0 {
fatalf("missing metadata option\n")
}
ix, err := index.OpenReadOnly(*metadata)
reportError(err)
defer ix.Close()
last := ^uint64(0)
for r, v := ix.FullRange(); r.HasNext(); v = r.Next() {
if o := r.Owner(); o != last {
fmt.Printf("owner %d\n", o)
last = o
}
k := r.Key()
fmt.Printf("%s @ %d\n", k, r.Generation())
_ = v
}
}
func init() {
subcommand.Register("dump-index",
"for debugging, dump the index in text format",
&dumpIndexCommand{})
}