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