windows: create files if they don't exist, and with write permission

Author: puffnfresh

src/libutil/fs-sink.cc

@@ -112,7 +112,7 @@ void RestoreSink::createRegularFile(const CanonPath & path, std::function<void(C
     crf.startFsync = startFsync;
     crf.fd =
 #ifdef _WIN32
-        CreateFileW(p.c_str(), GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL)
+        CreateFileW(p.c_str(), GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, CREATE_NEW, FILE_ATTRIBUTE_NORMAL, NULL)
 #else
         open(p.c_str(), O_CREAT | O_EXCL | O_WRONLY | O_CLOEXEC, 0666)
 #endif