diff --git a/libc/include/utmpx.h b/libc/include/utmpx.h
new file mode 100644
index 0000000..5ed8e1a
--- /dev/null
+++ b/libc/include/utmpx.h
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#pragma once
+
+/**
+ * @file utmpx.h
+ * @brief No-op implementation of POSIX login records.
+ */
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <time.h>
+
+#define EMPTY         0
+#define RUN_LVL       1
+#define BOOT_TIME     2
+#define NEW_TIME      3
+#define OLD_TIME      4
+#define INIT_PROCESS  5
+#define LOGIN_PROCESS 6
+#define USER_PROCESS  7
+#define DEAD_PROCESS  8
+#define ACCOUNTING    9
+
+struct utmpx {
+  short ut_type;
+  pid_t ut_pid;
+  char ut_line[32];
+  char ut_id[4];
+  char ut_user[32];
+  char ut_host[256];
+
+  struct {
+    short e_termination;
+    short e_exit;
+  } ut_exit;
+
+  long ut_session;
+  struct timeval ut_tv;
+
+  int32_t ut_addr_v6[4];
+  char unused[20];
+};
+
+__BEGIN_DECLS
+
+/**
+ * Does nothing.
+ */
+void setutxent(void) __RENAME(setutent);
+
+/**
+ * Does nothing and returns null.
+ */
+struct utmpx* _Nullable getutxent(void) __RENAME(getutent);
+
+/**
+ * Does nothing and returns null.
+ */
+struct utmpx* _Nullable getutxid(const struct utmpx* _Nonnull __entry) __RENAME(getutent);
+
+/**
+ * Does nothing and returns null.
+ */
+struct utmpx* _Nullable getutxline(const struct utmpx* _Nonnull __entry) __RENAME(getutent);
+
+/**
+ * Does nothing and returns null.
+ */
+struct utmpx* _Nullable pututxline(const struct utmpx* _Nonnull __entry) __RENAME(pututline);
+
+/**
+ * Does nothing.
+ */
+void endutxent(void) __RENAME(endutent);
+
+__END_DECLS