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43 lines
775 B
C++
43 lines
775 B
C++
#pragma once
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///@file
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#include <memory>
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#include <vector>
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#include <sys/types.h>
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namespace nix {
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struct UserLock
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{
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virtual ~UserLock() { }
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/**
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* Get the first and last UID.
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*/
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std::pair<uid_t, uid_t> getUIDRange()
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{
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auto first = getUID();
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return {first, first + getUIDCount() - 1};
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}
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/**
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* Get the first UID.
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*/
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virtual uid_t getUID() = 0;
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virtual uid_t getUIDCount() = 0;
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virtual gid_t getGID() = 0;
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virtual std::vector<gid_t> getSupplementaryGIDs() = 0;
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};
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/**
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* Acquire a user lock for a UID range of size `nrIds`. Note that this
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* may return nullptr if no user is available.
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*/
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std::unique_ptr<UserLock> acquireUserLock(uid_t nrIds, bool useUserNamespace);
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bool useBuildUsers();
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}
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