/*
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/>.
*/
/**
* @authors
* Jeffrey Wilcke <i@jev.io>
* Viktor Tron <viktor@ethdev.com>
*/
package utils
import (
"fmt"
"io"
"os"
"os/signal"
"regexp"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/eth"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/rlp"
)
var clilogger = logger.NewLogger("CLI")
var interruptCallbacks = []func(os.Signal){}
// Register interrupt handlers callbacks
func RegisterInterrupt(cb func(os.Signal)) {
interruptCallbacks = append(interruptCallbacks, cb)
}
// go routine that call interrupt handlers in order of registering
func HandleInterrupt() {
c := make(chan os.Signal, 1)
go func() {
signal.Notify(c, os.Interrupt)
for sig := range c {
clilogger.Errorf("Shutting down (%v) ... \n", sig)
RunInterruptCallbacks(sig)
}
}()
}
func RunInterruptCallbacks(sig os.Signal) {
for _, cb := range interruptCallbacks {
cb(sig)
}
}
func openLogFile(Datadir string, filename string) *os.File {
path := common.AbsolutePath(Datadir, filename)
file, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
if err != nil {
panic(fmt.Sprintf("error opening log file '%s': %v", filename, err))
}
return file
}
func confirm(message string) bool {
fmt.Println(message, "Are you sure? (y/n)")
var r string
fmt.Scanln(&r)
for ; ; fmt.Scanln(&r) {
if r == "n" || r == "y" {
break
} else {
fmt.Printf("Yes or no? (%s)", r)
}
}
return r == "y"
}
func initDataDir(Datadir string) {
_, err := os.Stat(Datadir)
if err != nil {
if os.IsNotExist(err) {
fmt.Printf("Data directory '%s' doesn't exist, creating it\n", Datadir)
os.Mkdir(Datadir, 0777)
}
}
}
func exit(err error) {
status := 0
if err != nil {
fmt.Fprintln(os.Stderr, "Fatal:", err)
status = 1
}
logger.Flush()
os.Exit(status)
}
// Fatalf formats a message to standard output and exits the program.
func Fatalf(format string, args ...interface{}) {
fmt.Fprintf(os.Stderr, "Fatal: "+format+"\n", args...)
logger.Flush()
os.Exit(1)
}
func StartEthereum(ethereum *eth.Ethereum) {
clilogger.Infoln("Starting ", ethereum.Name())
if err := ethereum.Start(); err != nil {
exit(err)
}
RegisterInterrupt(func(sig os.Signal) {
ethereum.Stop()
logger.Flush()
})
}
func StartEthereumForTest(ethereum *eth.Ethereum) {
clilogger.Infoln("Starting ", ethereum.Name())
ethereum.StartForTest()
RegisterInterrupt(func(sig os.Signal) {
ethereum.Stop()
logger.Flush()
})
}
func FormatTransactionData(data string) []byte {
d := common.StringToByteFunc(data, func(s string) (ret []byte) {
slice := regexp.MustCompile("\\n|\\s").Split(s, 1000000000)
for _, dataItem := range slice {
d := common.FormatData(dataItem)
ret = append(ret, d...)
}
return
})
return d
}
func ImportChain(chainmgr *core.ChainManager, fn string) error {
fmt.Printf("importing blockchain '%s'\n", fn)
fh, err := os.OpenFile(fn, os.O_RDONLY, os.ModePerm)
if err != nil {
return err
}
defer fh.Close()
chainmgr.Reset()
stream := rlp.NewStream(fh)
var i int
for ; ; i++ {
var b types.Block
err := stream.Decode(&b)
if err == io.EOF {
break
} else if err != nil {
return fmt.Errorf("at block %d: %v", i, err)
}
if err := chainmgr.InsertChain(types.Blocks{b}); err != nil {
return fmt.Errorf("invalid block %d: %v", i, err)
}
}
fmt.Printf("imported %d blocks\n", i)
return nil
}
func ExportChain(chainmgr *core.ChainManager, fn string) error {
fmt.Printf("exporting blockchain '%s'\n", fn)
fh, err := os.OpenFile(fn, os.O_WRONLY|os.O_TRUNC, os.ModePerm)
if err != nil {
return err
}
defer fh.Close()
if err := chainmgr.Export(fh); err != nil {
return err
}
fmt.Printf("exported blockchain\n")
return nil
}
