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// Find and pretty-print holes & data sections of a file.
package main
import (
"flag"
"fmt"
"os"
"github.com/rfjakob/gocryptfs/contrib/findholes/holes"
)
func main() {
flags := struct {
verify *bool
create *bool
}{}
flags.verify = flag.Bool("verify", false, "Verify results using full file scan")
flags.create = flag.Bool("create", false, "Create test file with random holes")
flag.Parse()
if flag.NArg() != 1 {
fmt.Printf("Usage: findholes FILE\n")
os.Exit(1)
}
path := flag.Arg(0)
if *flags.create {
holes.Create(path)
}
f, err := os.Open(path)
if err != nil {
// os.Open() gives nicer error messages than syscall.Open()
fmt.Println(err)
os.Exit(1)
}
defer f.Close()
segments, err := holes.Find(int(f.Fd()))
if err != nil {
fmt.Println(err)
os.Exit(1)
}
fmt.Println(holes.PrettyPrint(segments))
if *flags.verify {
err = holes.Verify(int(f.Fd()), segments)
if err != nil {
fmt.Println(err)
os.Exit(1)
} else {
fmt.Println("verify ok")
}
}
}
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