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#pragma once
#include "types.hh"
#include <optional>
namespace nix {
struct UserLock
{
virtual ~UserLock() { }
/* Get the first and last UID. */
virtual std::pair<uid_t, uid_t> getUIDRange() = 0;
/* Get the first UID. */
uid_t getUID()
{
return getUIDRange().first;
}
uid_t getUIDCount()
{
return getUIDRange().second - getUIDRange().first + 1;
}
virtual gid_t getGID() = 0;
virtual std::vector<gid_t> getSupplementaryGIDs() = 0;
/* Kill any processes currently executing as this user. */
virtual void kill() = 0;
virtual std::optional<Path> getCgroup() { return {}; };
};
/* Acquire a user lock. Note that this may return nullptr if no user
is available. */
std::unique_ptr<UserLock> acquireUserLock();
bool useBuildUsers();
}
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