Reviewed by: kevans Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D14454
191 lines
5.1 KiB
C
191 lines
5.1 KiB
C
/*-
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* Copyright (c) 2011 Wojciech A. Koszek <wkoszek@FreeBSD.org>
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* Copyright (c) 2014 Pedro Souza <pedrosouza@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stand.h>
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#include "bootstrap.h"
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#define lua_c
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#include "lstd.h"
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#include <lua.h>
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#include <ldebug.h>
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#include <lauxlib.h>
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#include <lualib.h>
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#include <lerrno.h>
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#include <lfs.h>
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#include <lutils.h>
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struct interp_lua_softc {
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lua_State *luap;
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};
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static struct interp_lua_softc lua_softc;
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#ifdef LUA_DEBUG
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#define LDBG(...) do { \
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printf("%s(%d): ", __func__, __LINE__); \
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printf(__VA_ARGS__); \
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printf("\n"); \
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} while (0)
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#else
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#define LDBG(...)
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#endif
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static void *
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interp_lua_realloc(void *ud __unused, void *ptr, size_t osize __unused, size_t nsize)
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{
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if (nsize == 0) {
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free(ptr);
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return NULL;
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}
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return realloc(ptr, nsize);
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}
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/*
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* The libraries commented out below either lack the proper
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* support from libsa, or they are unlikely to be useful
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* in the bootloader, so have been commented out.
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*/
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static const luaL_Reg loadedlibs[] = {
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{"_G", luaopen_base},
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{LUA_LOADLIBNAME, luaopen_package},
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// {LUA_COLIBNAME, luaopen_coroutine},
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// {LUA_TABLIBNAME, luaopen_table},
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{LUA_STRLIBNAME, luaopen_string},
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// {LUA_IOLIBNAME, luaopen_io},
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// {LUA_OSLIBNAME, luaopen_os},
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// {LUA_MATHLIBNAME, luaopen_math},
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// {LUA_UTF8LIBNAME, luaopen_utf8},
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// {LUA_DBLIBNAME, luaopen_debug},
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{"errno", luaopen_errno},
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{"io", luaopen_io},
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{"lfs", luaopen_lfs},
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{"loader", luaopen_loader},
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{NULL, NULL}
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};
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void
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interp_init(void)
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{
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lua_State *luap;
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struct interp_lua_softc *softc = &lua_softc;
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const char *filename;
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const luaL_Reg *lib;
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setenv("script.lang", "lua", 1);
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LDBG("creating context");
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luap = lua_newstate(interp_lua_realloc, NULL);
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if (luap == NULL) {
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printf("problem initializing the Lua interpreter\n");
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abort();
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}
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softc->luap = luap;
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/* "require" functions from 'loadedlibs' and set results to global table */
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for (lib = loadedlibs; lib->func; lib++) {
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luaL_requiref(luap, lib->name, lib->func, 1);
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lua_pop(luap, 1); /* remove lib */
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}
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filename = "/boot/lua/loader.lua";
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if (interp_include(filename) != 0) {
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const char *errstr = lua_tostring(luap, -1);
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errstr = errstr == NULL ? "unknown" : errstr;
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printf("Startup errorr in %s:\nLUA ERROR: %s.\n", filename, errstr);
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lua_pop(luap, 1);
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}
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}
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int
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interp_run(const char *line)
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{
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int argc, nargc;
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char **argv;
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lua_State *luap;
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struct interp_lua_softc *softc = &lua_softc;
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int status;
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luap = softc->luap;
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LDBG("executing line...");
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if ((status = luaL_dostring(luap, line)) != 0) {
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lua_pop(luap, 1);
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/*
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* The line wasn't executable as lua; run it through parse to
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* to get consistent parsing of command line arguments, then
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* run it through cli_execute. If that fails, then we'll try it
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* as a builtin.
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*/
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if (parse(&argc, &argv, line) == 0) {
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lua_getglobal(luap, "cli_execute");
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for (nargc = 0; nargc < argc; ++nargc) {
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lua_pushstring(luap, argv[nargc]);
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}
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status = lua_pcall(luap, argc, 1, 0);
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lua_pop(luap, 1);
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if (status != 0) {
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/*
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* Lua cli_execute will pass the function back
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* through loader.command, which is a proxy to
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* interp_builtin_cmd. If we failed to interpret
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* the command, though, then there's a chance
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* that didn't happen. Call interp_builtin_cmd
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* directly if our lua_pcall was not successful.
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*/
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status = interp_builtin_cmd(argc, argv);
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}
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if (status != 0) {
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printf("Command failed\n");
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status = CMD_ERROR;
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}
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free(argv);
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} else {
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printf("Failed to parse \'%s\'\n", line);
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status = CMD_ERROR;
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}
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}
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return (status == 0 ? CMD_OK : CMD_ERROR);
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}
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int
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interp_include(const char *filename)
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{
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struct interp_lua_softc *softc = &lua_softc;
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LDBG("loading file %s", filename);
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return (luaL_dofile(softc->luap, filename));
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}
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