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-rw-r--r--cmd/geth/chaincmd.go10
1 files changed, 7 insertions, 3 deletions
diff --git a/cmd/geth/chaincmd.go b/cmd/geth/chaincmd.go
index 2e90001af..8586e3b81 100644
--- a/cmd/geth/chaincmd.go
+++ b/cmd/geth/chaincmd.go
@@ -76,16 +76,20 @@ func exportChain(ctx *cli.Context) {
start := time.Now()
var err error
+ fp := ctx.Args().First()
if len(ctx.Args()) < 3 {
- err = utils.ExportChain(chain, ctx.Args().First())
+ 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\n")
+ utils.Fatalf("Export error in parsing parameters: block number not an integer\n")
}
- err = utils.ExportAppendChain(chain, ctx.Args().First(), uint64(first), uint64(last))
+ 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 {