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 44 static int 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 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 90 luaopen_posix_sys_stat(lua_State *L) 91 { 92 luaL_newlib(L, sys_statlib); 93 return 1; 94 } 95 96 int 97 luaopen_posix_unistd(lua_State *L) 98 { 99 luaL_newlib(L, unistdlib); 100 return 1; 101 } 102