Multiple places coordinate to 'know' where lua scripts are installed. Knock this down to being formally defined (and overridable) in exactly one spot, defs.mk, and spread the knowledge to loaders and liblua alike. A future commit will expose this to lua as loader.lua_path, so it can build absolute paths to lua scripts as needed. MFC after: 1 week
199 lines
5.3 KiB
C
199 lines
5.3 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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#define LOADER_LUA LUA_PATH "/loader.lua"
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INTERP_DEFINE("lua");
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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 = 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 error 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, ret;
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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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command_errmsg = NULL;
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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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ret = lua_tointeger(luap, 1);
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lua_pop(luap, 1);
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if (status != 0 || ret != 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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if (command_errmsg != NULL)
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printf("%s\n", command_errmsg);
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else
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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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