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Kernel: Allow 'elevating' unveil permissions if implicitly inherited from '/'
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. ```
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3 changed files with 14 additions and 5 deletions
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@ -41,15 +41,19 @@ enum UnveilAccess {
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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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