http: Exclusively lock download files

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/src/pakfire/http.py b/src/pakfire/http.py
index 2a2fe03ef1731f8800166248539bdeab42d89dfd..dd34285a8fdbe0fd851c26432ed80c060da480c5 100644 (file)
--- a/src/pakfire/http.py
+++ b/src/pakfire/http.py
@@ -20,6 +20,7 @@
 ###############################################################################
 
 import base64
+import fcntl
 import json
 import logging
 import ssl
@@ -286,6 +287,12 @@ class Client(object):
                        while True:
                                with self._make_progressbar(message) as p:
                                        with open(filename, "wb") as f:
+                                               # Exclusively lock the file for download
+                                               try:
+                                                       fcntl.flock(f, fcntl.LOCK_EX)
+                                               except OSError as e:
+                                                       raise DownloadError(_("Could not lock target file")) from e
+
                                                # Prepare HTTP request
                                                r = self._make_request(url, mirror=self.mirror, **kwargs)