diff options
Diffstat (limited to 'eth')
| -rw-r--r-- | eth/api.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/eth/api.go b/eth/api.go index 98c2f5874..f8c51c09b 100644 --- a/eth/api.go +++ b/eth/api.go @@ -168,6 +168,11 @@ func NewPrivateAdminAPI(eth *Ethereum) *PrivateAdminAPI { // ExportChain exports the current blockchain into a local file. func (api *PrivateAdminAPI) ExportChain(file string) (bool, error) { + if _, err := os.Stat(file); err == nil { + // File already exists. Allowing overwrite could be a DoS vecotor, + // since the 'file' may point to arbitrary paths on the drive + return false, errors.New("location would overwrite an existing file") + } // Make sure we can create the file to export into out, err := os.OpenFile(file, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, os.ModePerm) if err != nil { |