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// Copyright 2014 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
// Package utils contains internal helper functions for go-ethereum commands.
package utils
import (
"compress/gzip"
"fmt"
"io"
"os"
"os/signal"
"runtime"
"strings"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/internal/debug"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/rlp"
)
const (
importBatchSize = 2500
)
// Fatalf formats a message to standard error and exits the program.
// The message is also printed to standard output if standard error
// is redirected to a different file.
func Fatalf(format string, args ...interface{}) {
w := io.MultiWriter(os.Stdout, os.Stderr)
if runtime.GOOS == "windows" {
// The SameFile check below doesn't work on Windows.
// stdout is unlikely to get redirected though, so just print there.
w = os.Stdout
} else {
outf, _ := os.Stdout.Stat()
errf, _ := os.Stderr.Stat()
if outf != nil && errf != nil && os.SameFile(outf, errf) {
w = os.Stderr
}
}
fmt.Fprintf(w, "Fatal: "+format+"\n", args...)
os.Exit(1)
}
func StartNode(stack *node.Node) {
if err := stack.Start(); err != nil {
Fatalf("Error starting protocol stack: %v", err)
}
go func() {
sigc := make(chan os.Signal, 1)
signal.Notify(sigc, os.Interrupt)
defer signal.Stop(sigc)
<-sigc
log.Info("Got interrupt, shutting down...")
go stack.Stop()
for i := 10; i > 0; i-- {
<-sigc
if i > 1 {
log.Warn("Already shutting down, interrupt more to panic.", "times", i-1)
}
}
debug.Exit() // ensure trace and CPU profile data is flushed.
debug.LoudPanic("boom")
}()
}
func ImportChain(chain *core.BlockChain, fn string) error {
// Watch for Ctrl-C while the import is running.
// If a signal is received, the import will stop at the next batch.
interrupt := make(chan os.Signal, 1)
stop := make(chan struct{})
signal.Notify(interrupt, os.Interrupt)
defer signal.Stop(interrupt)
defer close(interrupt)
go func() {
if _, ok := <-interrupt; ok {
log.Info("Interrupted during import, stopping at next batch")
}
close(stop)
}()
checkInterrupt := func() bool {
select {
case <-stop:
return true
default:
return false
}
}
log.Info("Importing blockchain", "file", fn)
fh, err := os.Open(fn)
if err != nil {
return err
}
defer fh.Close()
var reader io.Reader = fh
if strings.HasSuffix(fn, ".gz") {
if reader, err = gzip.NewReader(reader); err != nil {
return err
}
}
stream := rlp.NewStream(reader, 0)
// Run actual the import.
blocks := make(types.Blocks, importBatchSize)
n := 0
for batch := 0; ; batch++ {
// Load a batch of RLP blocks.
if checkInterrupt() {
return fmt.Errorf("interrupted")
}
i := 0
for ; i < importBatchSize; i++ {
var b types.Block
if err := stream.Decode(&b); err == io.EOF {
break
} else if err != nil {
return fmt.Errorf("at block %d: %v", n, err)
}
// don't import first block
if b.NumberU64() == 0 {
i--
continue
}
blocks[i] = &b
n++
}
if i == 0 {
break
}
// Import the batch.
if checkInterrupt() {
return fmt.Errorf("interrupted")
}
if hasAllBlocks(chain, blocks[:i]) {
log.Info("Skipping batch as all blocks present", "batch", batch, "first", blocks[0].Hash(), "last", blocks[i-1].Hash())
continue
}
if _, err := chain.InsertChain(blocks[:i]); err != nil {
return fmt.Errorf("invalid block %d: %v", n, err)
}
}
return nil
}
func hasAllBlocks(chain *core.BlockChain, bs []*types.Block) bool {
for _, b := range bs {
if !chain.HasBlock(b.Hash()) {
return false
}
}
return true
}
func ExportChain(blockchain *core.BlockChain, fn string) error {
log.Info("Exporting blockchain", "file", fn)
fh, err := os.OpenFile(fn, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, os.ModePerm)
if err != nil {
return err
}
defer fh.Close()
var writer io.Writer = fh
if strings.HasSuffix(fn, ".gz") {
writer = gzip.NewWriter(writer)
defer writer.(*gzip.Writer).Close()
}
if err := blockchain.Export(writer); err != nil {
return err
}
log.Info("Exported blockchain", "file", fn)
return nil
}
func ExportAppendChain(blockchain *core.BlockChain, fn string, first uint64, last uint64) error {
log.Info("Exporting blockchain", "file", fn)
// TODO verify mode perms
fh, err := os.OpenFile(fn, os.O_CREATE|os.O_APPEND|os.O_WRONLY, os.ModePerm)
if err != nil {
return err
}
defer fh.Close()
var writer io.Writer = fh
if strings.HasSuffix(fn, ".gz") {
writer = gzip.NewWriter(writer)
defer writer.(*gzip.Writer).Close()
}
if err := blockchain.ExportN(writer, first, last); err != nil {
return err
}
log.Info("Exported blockchain to", "file", fn)
return nil
}
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