2 * Copyright (c) 2011 Wojciech A. Koszek <wkoszek@FreeBSD.org>
3 * Copyright (c) 2014 Pedro Souza <pedrosouza@freebsd.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
32 #include "bootstrap.h"
47 struct interp_lua_softc {
51 static struct interp_lua_softc lua_softc;
54 #define LDBG(...) do { \
55 printf("%s(%d): ", __func__, __LINE__); \
56 printf(__VA_ARGS__); \
65 interp_lua_realloc(void *ud __unused, void *ptr, size_t osize __unused, size_t nsize)
72 return realloc(ptr, nsize);
76 * The libraries commented out below either lack the proper
77 * support from libsa, or they are unlikely to be useful
78 * in the bootloader, so have been commented out.
80 static const luaL_Reg loadedlibs[] = {
82 {LUA_LOADLIBNAME, luaopen_package},
83 // {LUA_COLIBNAME, luaopen_coroutine},
84 // {LUA_TABLIBNAME, luaopen_table},
85 {LUA_STRLIBNAME, luaopen_string},
86 // {LUA_IOLIBNAME, luaopen_io},
87 // {LUA_OSLIBNAME, luaopen_os},
88 // {LUA_MATHLIBNAME, luaopen_math},
89 // {LUA_UTF8LIBNAME, luaopen_utf8},
90 // {LUA_DBLIBNAME, luaopen_debug},
91 {"errno", luaopen_errno},
94 {"loader", luaopen_loader},
102 struct interp_lua_softc *softc = &lua_softc;
103 const char *filename;
106 setenv("script.lang", "lua", 1);
107 LDBG("creating context");
109 luap = lua_newstate(interp_lua_realloc, NULL);
111 printf("problem initializing the Lua interpreter\n");
116 /* "require" functions from 'loadedlibs' and set results to global table */
117 for (lib = loadedlibs; lib->func; lib++) {
118 luaL_requiref(luap, lib->name, lib->func, 1);
119 lua_pop(luap, 1); /* remove lib */
122 filename = "/boot/lua/loader.lua";
123 if (interp_include(filename) != 0) {
124 const char *errstr = lua_tostring(luap, -1);
125 errstr = errstr == NULL ? "unknown" : errstr;
126 printf("Startup errorr in %s:\nLUA ERROR: %s.\n", filename, errstr);
132 interp_run(const char *line)
137 struct interp_lua_softc *softc = &lua_softc;
141 LDBG("executing line...");
142 if ((status = luaL_dostring(luap, line)) != 0) {
145 * The line wasn't executable as lua; run it through parse to
146 * to get consistent parsing of command line arguments, then
147 * run it through cli_execute. If that fails, then we'll try it
150 if (parse(&argc, &argv, line) == 0) {
151 lua_getglobal(luap, "cli_execute");
152 for (nargc = 0; nargc < argc; ++nargc) {
153 lua_pushstring(luap, argv[nargc]);
155 status = lua_pcall(luap, argc, 1, 0);
159 * Lua cli_execute will pass the function back
160 * through loader.command, which is a proxy to
161 * interp_builtin_cmd. If we failed to interpret
162 * the command, though, then there's a chance
163 * that didn't happen. Call interp_builtin_cmd
164 * directly if our lua_pcall was not successful.
166 status = interp_builtin_cmd(argc, argv);
169 printf("Command failed\n");
174 printf("Failed to parse \'%s\'\n", line);
179 return (status == 0 ? CMD_OK : CMD_ERROR);
183 interp_include(const char *filename)
185 struct interp_lua_softc *softc = &lua_softc;
187 LDBG("loading file %s", filename);
189 return (luaL_dofile(softc->luap, filename));