31 lines
886 B
C++
31 lines
886 B
C++
 
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#pragma once
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#include <sys/types.h>
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#include <filesystem>
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#include <memory>
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#include <string>
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namespace doos {
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// One cgroup v2 leaf per running container, under the cgroup delegated to the user's systemd manager.
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// Used to freeze a container that hit its size cap (freezing needs no controller). Best effort:
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// create() returns null when delegation is absent, and the caller must say so.
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class Cgroup {
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public:
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static std::unique_ptr<Cgroup> create(const std::string& name, std::string& whyNot);
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~Cgroup();
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Cgroup(const Cgroup&) = delete;
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Cgroup& operator=(const Cgroup&) = delete;
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void add(pid_t pid) const;
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void freeze(bool on) const;
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bool frozen() const { return frozen_; }
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private:
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explicit Cgroup(std::filesystem::path dir) : dir_(std::move(dir)) {}
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std::filesystem::path dir_;
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mutable bool frozen_ = false;
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};
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} // namespace doos
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