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https://github.com/LadybirdBrowser/ladybird.git
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7b5aa06702
This can happen when an unveil follows another with a path that is a
sub-path of the other one:
```c++
unveil("/home/anon/.config/whoa.ini", "rw");
unveil("/home/anon", "r"); // this would fail, as "/home/anon" inherits
// the permissions of "/", which is None.
```
62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/String.h>
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#include <AK/Trie.h>
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namespace Kernel {
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enum UnveilAccess {
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Read = 1,
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Write = 2,
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Execute = 4,
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CreateOrRemove = 8,
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Browse = 16,
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None = 0,
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};
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struct UnveilNode;
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struct UnveilMetadata {
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String full_path;
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UnveilAccess permissions { None };
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bool explicitly_unveiled { false };
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bool unveil_inherited_from_root { false }; // true if permissions are inherited from the tree root (/).
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};
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struct UnveilNode final : public AK::Trie<String, UnveilMetadata, Traits<String>, UnveilNode> {
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using AK::Trie<String, UnveilMetadata, Traits<String>, UnveilNode>::Trie;
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bool permissions_inherited_from_root() const { return this->metadata_value().unveil_inherited_from_root; }
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bool was_explicitly_unveiled() const { return this->metadata_value().explicitly_unveiled; }
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UnveilAccess permissions() const { return this->metadata_value().permissions; }
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const String& path() const { return this->metadata_value().full_path; }
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};
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}
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