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 <sys/stat.h>
31
32#include <errno.h>
33#include <string.h>
34#include <unistd.h>
35
36#include <lua.h>
37#include "lauxlib.h"
38#include "lposix.h"
39
40/*
41 * Minimal implementation of luaposix needed for internal FreeBSD bits.
42 */
43
44static int
45lua_chmod(lua_State *L)
46{
47	int n;
48	const char *path;
49	mode_t mode;
50
51	n = lua_gettop(L);
52	luaL_argcheck(L, n == 2, n > 2 ? 3 : n,
53	    "chmod takes exactly two arguments");
54	path = luaL_checkstring(L, 1);
55	mode = (mode_t)luaL_checkinteger(L, 2);
56	if (chmod(path, mode) == -1) {
57		lua_pushnil(L);
58		lua_pushstring(L, strerror(errno));
59		lua_pushinteger(L, errno);
60		return 3;
61	}
62	lua_pushinteger(L, 0);
63	return 1;
64}
65
66static int
67lua_getpid(lua_State *L)
68{
69	int n;
70
71	n = lua_gettop(L);
72	luaL_argcheck(L, n == 0, 1, "too many arguments");
73	lua_pushinteger(L, getpid());
74	return 1;
75}
76
77#define REG_SIMPLE(n)	{ #n, lua_ ## n }
78static const struct luaL_Reg sys_statlib[] = {
79	REG_SIMPLE(chmod),
80	{ NULL, NULL },
81};
82
83static const struct luaL_Reg unistdlib[] = {
84	REG_SIMPLE(getpid),
85	{ NULL, NULL },
86};
87#undef REG_SIMPLE
88
89int
90luaopen_posix_sys_stat(lua_State *L)
91{
92	luaL_newlib(L, sys_statlib);
93	return 1;
94}
95
96int
97luaopen_posix_unistd(lua_State *L)
98{
99	luaL_newlib(L, unistdlib);
100	return 1;
101}
102