tmark 'blockchain_headers' file as sparse on windows - electrum - Electrum Bitcoin wallet
HTML git clone https://git.parazyd.org/electrum
DIR Log
DIR Files
DIR Refs
DIR Submodules
---
DIR commit cedd518aead91916ae68f96261908986a2a7909b
DIR parent 855a70bc6612669138a7f927d7cde9c894a3aab6
HTML Author: SomberNight <somber.night@protonmail.com>
Date: Wed, 19 Sep 2018 22:09:54 +0200
mark 'blockchain_headers' file as sparse on windows
based on fyookball/electrum@647a6cc26dfe2d0d942159207c6e72e1b0e8d94d
Diffstat:
M electrum/network.py | 3 ++-
M electrum/util.py | 10 ++++++++++
2 files changed, 12 insertions(+), 1 deletion(-)
---
DIR diff --git a/electrum/network.py b/electrum/network.py
t@@ -675,9 +675,10 @@ class Network(PrintError):
length = 80 * len(constants.net.CHECKPOINTS) * 2016
if not os.path.exists(filename) or os.path.getsize(filename) < length:
with open(filename, 'wb') as f:
- if length>0:
+ if length > 0:
f.seek(length-1)
f.write(b'\x00')
+ util.ensure_sparse_file(filename)
with b.lock:
b.update_size()
DIR diff --git a/electrum/util.py b/electrum/util.py
t@@ -383,6 +383,16 @@ def android_check_data_dir():
return data_dir
+def ensure_sparse_file(filename):
+ # On modern Linux, no need to do anything.
+ # On Windows, need to explicitly mark file.
+ if os.name == "nt":
+ try:
+ os.system('fsutil sparse setflag "{}" 1'.format(filename))
+ except Exception as e:
+ print_error('error marking file {} as sparse: {}'.format(filename, e))
+
+
def get_headers_dir(config):
return android_headers_dir() if 'ANDROID_DATA' in os.environ else config.path