diff --git a/libexec/flua/modules/lposix.c b/libexec/flua/modules/lposix.c
index adf3a7bb9a1f..88687be2788c 100644
--- a/libexec/flua/modules/lposix.c
+++ b/libexec/flua/modules/lposix.c
@@ -1,101 +1,160 @@
 /*-
  * Copyright (c) 2019 Kyle Evans <kevans@FreeBSD.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. 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 AUTHOR 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 AUTHOR 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.
  *
  */
 
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
 #include <sys/stat.h>
 
 #include <errno.h>
+#include <grp.h>
+#include <pwd.h>
 #include <string.h>
 #include <unistd.h>
 
 #include <lua.h>
 #include "lauxlib.h"
 #include "lposix.h"
 
 /*
  * Minimal implementation of luaposix needed for internal FreeBSD bits.
  */
 
 static int
 lua_chmod(lua_State *L)
 {
 	int n;
 	const char *path;
 	mode_t mode;
 
 	n = lua_gettop(L);
 	luaL_argcheck(L, n == 2, n > 2 ? 3 : n,
 	    "chmod takes exactly two arguments");
 	path = luaL_checkstring(L, 1);
 	mode = (mode_t)luaL_checkinteger(L, 2);
 	if (chmod(path, mode) == -1) {
 		lua_pushnil(L);
 		lua_pushstring(L, strerror(errno));
 		lua_pushinteger(L, errno);
 		return 3;
 	}
 	lua_pushinteger(L, 0);
 	return 1;
 }
 
+static int
+lua_chown(lua_State *L)
+{
+	int n;
+	const char *path;
+	uid_t owner = (uid_t) -1;
+	gid_t group = (gid_t) -1;
+
+	n = lua_gettop(L);
+	luaL_argcheck(L, n > 1, n,
+	   "chown takes at least two arguments");
+	path = luaL_checkstring(L, 1);
+	if (lua_isinteger(L, 2))
+		owner = (uid_t) lua_tointeger(L, 2);
+	else if (lua_isstring(L, 2)) {
+		struct passwd *p = getpwnam(lua_tostring(L, 2));
+		if (p != NULL)
+			owner = p->pw_uid;
+		else
+			return (luaL_argerror(L, 2,
+			    lua_pushfstring(L, "unknown user %s",
+			    lua_tostring(L, 2))));
+	} else if (!lua_isnoneornil(L, 2)) {
+		const char *type = luaL_typename(L, 2);
+		return (luaL_argerror(L, 2,
+		    lua_pushfstring(L, "integer or string expected, got %s",
+		    type)));
+	}
+
+	if (lua_isinteger(L, 3))
+		group = (gid_t) lua_tointeger(L, 3);
+	else if (lua_isstring(L, 3)) {
+		struct group *g = getgrnam(lua_tostring(L, 3));
+		if (g != NULL)
+			group = g->gr_gid;
+		else
+			return (luaL_argerror(L, 3,
+			    lua_pushfstring(L, "unknown user %s",
+			    lua_tostring(L, 3))));
+	} else if (!lua_isnoneornil(L, 3)) {
+		const char *type = luaL_typename(L, 3);
+		return (luaL_argerror(L, 3,
+		    lua_pushfstring(L, "integer or string expected, got %s",
+		    type)));
+	}
+
+	if (chown(path, owner, group) == -1) {
+		lua_pushnil(L);
+		lua_pushstring(L, strerror(errno));
+		lua_pushinteger(L, errno);
+		return (3);
+	}
+	lua_pushinteger(L, 0);
+	return (1);
+}
+
 static int
 lua_getpid(lua_State *L)
 {
 	int n;
 
 	n = lua_gettop(L);
 	luaL_argcheck(L, n == 0, 1, "too many arguments");
 	lua_pushinteger(L, getpid());
 	return 1;
 }
 
 #define REG_SIMPLE(n)	{ #n, lua_ ## n }
 static const struct luaL_Reg sys_statlib[] = {
 	REG_SIMPLE(chmod),
 	{ NULL, NULL },
 };
 
 static const struct luaL_Reg unistdlib[] = {
 	REG_SIMPLE(getpid),
+	REG_SIMPLE(chown),
 	{ NULL, NULL },
 };
 #undef REG_SIMPLE
 
 int
 luaopen_posix_sys_stat(lua_State *L)
 {
 	luaL_newlib(L, sys_statlib);
 	return 1;
 }
 
 int
 luaopen_posix_unistd(lua_State *L)
 {
 	luaL_newlib(L, unistdlib);
 	return 1;
 }