/*      $NetBSD: luasystm.c,v 1.6 2022/08/11 23:53:04 gutteridge Exp $ */

/*
* Copyright (c) 2011, 2013 Marc Balmer <[email protected]>.
* 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.
* 3. The name of the Author may not be used to endorse or promote products
*    derived from this software without specific prior written permission.
*
* 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 REGENTS 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.
*/

/* Lua systm module */

#include <sys/param.h>
#include <sys/lua.h>
#include <sys/callout.h>
#include <sys/cpu.h>
#ifdef _MODULE
#include <sys/module.h>
#endif
#include <sys/systm.h>

#include <lua.h>
#include <lauxlib.h>

#ifdef _MODULE
MODULE(MODULE_CLASS_MISC, luasystm, "lua");

/* Various printing functions */
static int
print(lua_State *L)
{
       const char *s;

       s = lua_tostring(L, -1);
       if (s)
               printf("%s", s);
       return 0;
}

static int
print_nolog(lua_State *L)
{
       const char *s;

       s = lua_tostring(L, -1);
       if (s)
               printf_nolog("%s", s);
       return 0;
}

static int
uprint(lua_State *L)
{
       const char *s;

       s = lua_tostring(L, -1);
       if (s)
               uprintf("%s", s);
       return 0;
}

static int
systm_aprint_normal(lua_State *L)
{
       const char *s;

       s = lua_tostring(L, -1);
       if (s)
               aprint_normal("%s", s);
       return 0;
}

static int
systm_aprint_naive(lua_State *L)
{
       const char *s;

       s = lua_tostring(L, -1);
       if (s)
               aprint_naive("%s", s);
       return 0;
}

static int
systm_aprint_verbose(lua_State *L)
{
       const char *s;

       s = lua_tostring(L, -1);
       if (s)
               aprint_verbose("%s", s);
       return 0;
}

static int
systm_aprint_debug(lua_State *L)
{
       const char *s;

       s = lua_tostring(L, -1);
       if (s)
               aprint_debug("%s", s);
       return 0;
}

static int
systm_aprint_error(lua_State *L)
{
       const char *s;

       s = lua_tostring(L, -1);
       if (s)
               aprint_error("%s", s);
       return 0;
}

static int
systm_aprint_get_error_count(lua_State *L)
{
       lua_pushinteger(L, aprint_get_error_count());
       return 1;
}

/* panicking */

static int
systm_panic(lua_State *L)
{
       const char *s;

       s = lua_tostring(L, -1);
       if (s)
               panic("%s", s);
       return 0;
}

/* callouts */

/* mutexes */

static int
luaopen_systm(lua_State *L)
{
       const luaL_Reg systm_lib[ ] = {
               { "print",                      print },
               { "print_nolog",                print_nolog },
               { "uprint",                     uprint },
               { "aprint_normal",              systm_aprint_normal },
               { "aprint_naive",               systm_aprint_naive },
               { "aprint_verbose",             systm_aprint_verbose },
               { "aprint_debug",               systm_aprint_debug },
               { "aprint_error",               systm_aprint_error },
               { "aprint_get_error_count",     systm_aprint_get_error_count },

               /* panicking */
               { "panic",                      systm_panic },

               /* callouts */

               /* mutexes */

               {NULL, NULL}
       };

       luaL_newlib(L, systm_lib);

       /* some string values */
       lua_pushstring(L, copyright);
       lua_setfield(L, -2, "copyright");
       lua_pushstring(L, cpu_getmodel());
       lua_setfield(L, -2, "cpu_model");
       lua_pushstring(L, machine);
       lua_setfield(L, -2, "machine");
       lua_pushstring(L, machine_arch);
       lua_setfield(L, -2, "machine_arch");
       lua_pushstring(L, osrelease);
       lua_setfield(L, -2, "osrelease");
       lua_pushstring(L, ostype);
       lua_setfield(L, -2, "ostype");
       lua_pushstring(L, kernel_ident);
       lua_setfield(L, -2, "kernel_ident");
       lua_pushstring(L, version);
       lua_setfield(L, -2, "version");

       /* some integer values */
       lua_pushinteger(L, ncpu);
       lua_setfield(L, -2, "ncpu");

       return 1;
}

static int
luasystm_modcmd(modcmd_t cmd, void *opaque)
{
       int error;

       switch (cmd) {
       case MODULE_CMD_INIT:
               error = klua_mod_register("systm", luaopen_systm);
               break;
       case MODULE_CMD_FINI:
               error = klua_mod_unregister("systm");
               break;
       default:
               error = ENOTTY;
       }
       return error;
}
#endif

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