1 /*-
2 * Copyright (c) 2019 Kyle Evans <[email protected]>
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
44 static int
lua_chmod(lua_State * L)45 lua_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
66 static int
lua_getpid(lua_State * L)67 lua_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 }
78 static const struct luaL_Reg sys_statlib[] = {
79 REG_SIMPLE(chmod),
80 { NULL, NULL },
81 };
82
83 static const struct luaL_Reg unistdlib[] = {
84 REG_SIMPLE(getpid),
85 { NULL, NULL },
86 };
87 #undef REG_SIMPLE
88
89 int
luaopen_posix_sys_stat(lua_State * L)90 luaopen_posix_sys_stat(lua_State *L)
91 {
92 luaL_newlib(L, sys_statlib);
93 return 1;
94 }
95
96 int
luaopen_posix_unistd(lua_State * L)97 luaopen_posix_unistd(lua_State *L)
98 {
99 luaL_newlib(L, unistdlib);
100 return 1;
101 }
102