diff options
Diffstat (limited to 'cmd/geth')
| -rw-r--r-- | cmd/geth/chaincmd.go | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/cmd/geth/chaincmd.go b/cmd/geth/chaincmd.go index 947532f40..8586e3b81 100644 --- a/cmd/geth/chaincmd.go +++ b/cmd/geth/chaincmd.go @@ -26,6 +26,12 @@ var ( Action: exportChain, Name: "export", Usage: `export blockchain into file`, + Description: ` +Requires a first argument of the file to write to. +Optional second and third arguments control the first and +last block to write. In this mode, the file will be appended +if already existing. + `, } upgradedbCommand = cli.Command{ Action: upgradeDB, @@ -63,12 +69,30 @@ func importChain(ctx *cli.Context) { } func exportChain(ctx *cli.Context) { - if len(ctx.Args()) != 1 { + if len(ctx.Args()) < 1 { utils.Fatalf("This command requires an argument.") } chain, _, _, _ := utils.MakeChain(ctx) start := time.Now() - if err := utils.ExportChain(chain, ctx.Args().First()); err != nil { + + var err error + fp := ctx.Args().First() + if len(ctx.Args()) < 3 { + err = utils.ExportChain(chain, fp) + } else { + // This can be improved to allow for numbers larger than 9223372036854775807 + first, ferr := strconv.ParseInt(ctx.Args().Get(1), 10, 64) + last, lerr := strconv.ParseInt(ctx.Args().Get(2), 10, 64) + if ferr != nil || lerr != nil { + utils.Fatalf("Export error in parsing parameters: block number not an integer\n") + } + if first < 0 || last < 0 { + utils.Fatalf("Export error: block number must be greater than 0\n") + } + err = utils.ExportAppendChain(chain, fp, uint64(first), uint64(last)) + } + + if err != nil { utils.Fatalf("Export error: %v\n", err) } fmt.Printf("Export done in %v", time.Since(start)) |