[release/1.4.10] cmd/utils, eth: display the user's current fork, minor text tweak

(cherry picked from commit 993b412)

Author: karalabe

cmd/utils/flags.go

@@ -793,7 +793,8 @@ func MustMakeChainConfigFromDb(ctx *cli.Context, db ethdb.Database) *core.ChainC
 	// If the chain is already initialized, use any existing chain configs
 	config := new(core.ChainConfig)
 
-	if genesis := core.GetBlock(db, core.GetCanonicalHash(db, 0)); genesis != nil {
+	genesis := core.GetBlock(db, core.GetCanonicalHash(db, 0))
+	if genesis != nil {
 		storedConfig, err := core.GetChainConfig(db, genesis.Hash())
 		switch err {
 		case nil:
@@ -827,6 +828,23 @@ func MustMakeChainConfigFromDb(ctx *cli.Context, db ethdb.Database) *core.ChainC
 	case ctx.GlobalBool(OpposeDAOFork.Name):
 		config.DAOForkSupport = false
 	}
+	// Temporarilly display a proper message so the user knows which fork its on
+	if !ctx.GlobalBool(TestNetFlag.Name) && (genesis == nil || genesis.Hash() == common.HexToHash("0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3")) {
+		choice := "SUPPORT"
+		if !config.DAOForkSupport {
+			choice = "OPPOSE"
+		}
+		current := fmt.Sprintf("Geth is currently configured to %s the DAO hard-fork!", choice)
+		howtoswap := fmt.Sprintf("You can change your choice prior to block #%v with --support-dao-fork or --oppose-dao-fork.", config.DAOForkBlock)
+		howtosync := fmt.Sprintf("After the hard-fork block #%v passed, changing chains requires a resync from scratch!", config.DAOForkBlock)
+		separator := strings.Repeat("-", len(howtoswap))
+
+		glog.V(logger.Warn).Info(separator)
+		glog.V(logger.Warn).Info(current)
+		glog.V(logger.Warn).Info(howtoswap)
+		glog.V(logger.Warn).Info(howtosync)
+		glog.V(logger.Warn).Info(separator)
+	}
 	return config
 }
 

eth/handler_test.go

@@ -638,6 +638,7 @@ func testDAOChallenge(t *testing.T, localForked, remoteForked bool, timeout bool
 		if err := p2p.Send(peer.app, BlockHeadersMsg, []*types.Header{blocks[0].Header()}); err != nil {
 			t.Fatalf("failed to answer challenge: %v", err)
 		}
+		time.Sleep(100 * time.Millisecond) // Sleep to avoid the verification racing with the drops
 	} else {
 		// Otherwise wait until the test timeout passes
 		time.Sleep(daoChallengeTimeout + 500*time.Millisecond)