Add a Lua FileSystem module, an emulation of a subset of the permissively licensed (MIT) Lua library of the same name[0], to our loader's Lua environment. [0]: https://github.com/keplerproject/luafilesystem/ Reviewed by: kevans Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D14418
168 lines
4.4 KiB
C
168 lines
4.4 KiB
C
/*-
|
|
* 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 <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#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 <lutils.h>
|
|
#include <lfs.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
|
|
|
|
|
|
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},
|
|
{"io", luaopen_io},
|
|
{"lfs", luaopen_lfs},
|
|
{"loader", luaopen_loader},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
void
|
|
interp_init(void)
|
|
{
|
|
lua_State *luap;
|
|
struct interp_lua_softc *softc = &lua_softc;
|
|
const char *filename;
|
|
const luaL_Reg *lib;
|
|
|
|
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 */
|
|
}
|
|
|
|
filename = "/boot/lua/loader.lua";
|
|
if (interp_include(filename) != 0) {
|
|
const char *errstr = lua_tostring(luap, -1);
|
|
errstr = errstr == NULL ? "unknown" : errstr;
|
|
printf("Startup errorr in %s:\nLUA ERROR: %s.\n", filename, errstr);
|
|
lua_pop(luap, 1);
|
|
}
|
|
}
|
|
|
|
int
|
|
interp_run(const char *line)
|
|
{
|
|
int argc;
|
|
char **argv;
|
|
lua_State *luap;
|
|
struct interp_lua_softc *softc = &lua_softc;
|
|
int status;
|
|
|
|
luap = softc->luap;
|
|
LDBG("executing line...");
|
|
if ((status = luaL_dostring(luap, line)) != 0) {
|
|
/*
|
|
* If we could not parse the line as Lua syntax,
|
|
* try parsing it as a loader command.
|
|
*/
|
|
lua_pop(luap, 1);
|
|
if (parse(&argc, &argv, line) == 0) {
|
|
status = interp_builtin_cmd(argc, argv);
|
|
if (status != CMD_OK)
|
|
printf("Command failed\n");
|
|
free(argv);
|
|
} else {
|
|
printf("Failed to parse \'%s\'\n", line);
|
|
status = -1;
|
|
}
|
|
}
|
|
|
|
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));
|
|
}
|