1 /*-
2 * Copyright (c) 2019 Kyle Evans <kevans@FreeBSD.org>
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <unistd.h>
31
32 #include <lua.h>
33 #include "lauxlib.h"
34 #include "lposix.h"
35
36 /*
37 * Minimal implementation of luaposix needed for internal FreeBSD bits.
38 */
39
40 static int
lua_getpid(lua_State * L)41 lua_getpid(lua_State *L)
42 {
43 int n;
44
45 n = lua_gettop(L);
46 luaL_argcheck(L, n == 0, 1, "too many arguments");
47 lua_pushinteger(L, getpid());
48 return 1;
49 }
50
51 #define REG_SIMPLE(n) { #n, lua_ ## n }
52 static const struct luaL_Reg unistdlib[] = {
53 REG_SIMPLE(getpid),
54 { NULL, NULL },
55 };
56 #undef REG_SIMPLE
57
58 int
luaopen_posix_unistd(lua_State * L)59 luaopen_posix_unistd(lua_State *L)
60 {
61 luaL_newlib(L, unistdlib);
62 return 1;
63 }
64