1 files changed, 37 insertions, 0 deletions
diff --git a/src/libstore/lock.hh b/src/libstore/lock.hh
new file mode 100644
index 000000000..8fbb67ddc
--- /dev/null
+++ b/src/libstore/lock.hh
@@ -0,0 +1,37 @@
+#pragma once
+
+#include "sync.hh"
+#include "types.hh"
+#include "util.hh"
+
+namespace nix {
+
+class UserLock
+{
+private:
+    Path fnUserLock;
+    AutoCloseFD fdUserLock;
+
+    bool isEnabled = false;
+    string user;
+    uid_t uid = 0;
+    gid_t gid = 0;
+    std::vector<gid_t> supplementaryGIDs;
+
+public:
+    UserLock();
+
+    void kill();
+
+    string getUser() { return user; }
+    uid_t getUID() { assert(uid); return uid; }
+    uid_t getGID() { assert(gid); return gid; }
+    std::vector<gid_t> getSupplementaryGIDs() { return supplementaryGIDs; }
+
+    bool findFreeUser();
+
+    bool enabled() { return isEnabled; }
+
+};
+
+}