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8218418: (fs) Files.createSymbolicLink should use SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE (win)

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Reviewed-by: alanb
This commit is contained in:
Brian Burkhalter 2019-04-01 15:59:45 -07:00
parent 4494be3b5f
commit 07991d3f2d
1 changed files with 9 additions and 3 deletions
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12
src/java.base/windows/native/libnio/fs/WindowsNativeDispatcher.c
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2008, 2018, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2008, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -1063,8 +1063,14 @@ Java_sun_nio_fs_WindowsNativeDispatcher_CreateSymbolicLink0(JNIEnv* env,
LPCWSTR link = jlong_to_ptr(linkAddress);
LPCWSTR target = jlong_to_ptr(targetAddress);
/* On Windows 64-bit this appears to succeed even when there is insufficient privileges */
if (CreateSymbolicLinkW(link, target, (DWORD)flags) == 0)
// Allow creation of symbolic links when the process is not elevated.
// Developer Mode must be enabled for this option to function, otherwise
// it will be ignored.
DWORD dwFlags = (DWORD)flags | SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE;
// On Windows 64-bit this appears to succeed even when there are
// insufficient privileges
if (CreateSymbolicLinkW(link, target, dwFlags) == 0)
throwWindowsException(env, GetLastError());
}