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/*
* rhnop
*
* Copyright (C) 2011-2015 Christian Pointner <equinox@helsinki.at>
*
* This file is part of rhnop.
*
* rhnop is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* rhnop is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with rhnop. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <pthread.h>
#include <lua.h>
#include <lualib.h>
#include <lauxlib.h>
#include "l_pipe.h"
#include "config.h"
#define LUA_MAIN_LOOP_FUNC "main_loop"
#define QLISTENER LIBDIR"/qlistener.lua"
#define TCPSERVER LIBDIR"/tcpserver.lua"
#if LUA_VERSION_NUM > 501
static const luaL_Reg nopsyncd_lualibs[] = {
{"_G", luaopen_base},
{LUA_LOADLIBNAME, luaopen_package},
{LUA_TABLIBNAME, luaopen_table},
{LUA_STRLIBNAME, luaopen_string},
{LUA_MATHLIBNAME, luaopen_math},
{LUA_IOLIBNAME, luaopen_io},
{LUA_OSLIBNAME, luaopen_os},
{LUA_BITLIBNAME, luaopen_bit32},
{LUA_PIPELIBNAME, luaopen_pipe},
{NULL, NULL}
};
#else
static const luaL_Reg nopsyncd_lualibs[] = {
{"", luaopen_base},
{LUA_LOADLIBNAME, luaopen_package},
{LUA_TABLIBNAME, luaopen_table},
{LUA_STRLIBNAME, luaopen_string},
{LUA_MATHLIBNAME, luaopen_math},
{LUA_IOLIBNAME, luaopen_io},
{LUA_OSLIBNAME, luaopen_os},
{LUA_PIPELIBNAME, luaopen_pipe},
{NULL, NULL}
};
#endif
int init_main_loop(lua_State *L, const char* filename)
{
const luaL_Reg *lib = nopsyncd_lualibs;
#if LUA_VERSION_NUM > 501
for (; lib->func; lib++) {
luaL_requiref(L, lib->name, lib->func, 1);
lua_pop(L, 1);
}
#else
for (; lib->func; lib++) {
lua_pushcfunction(L, lib->func);
lua_pushstring(L, lib->name);
lua_call(L, 1, 0);
}
#endif
int ret = luaL_loadfile(L, filename);
if(ret) {
const char* err_str = luaL_checkstring(L, -1);
switch(ret) {
case LUA_ERRSYNTAX: fprintf(stderr, "luaL_loadfile() syntax error: %s\n", err_str); break;
case LUA_ERRMEM: fprintf(stderr, "luaL_loadfile() malloc error: %s\n", err_str); break;
case LUA_ERRFILE: fprintf(stderr, "lauL_loadfile() error: %s\n", err_str); break;
default: fprintf(stderr, "luaL_loadfile() unknown error: %s\n", err_str); break;
}
return -1;
}
lua_pushstring(L, LIBDIR);
lua_setglobal(L, "rhnoplibdir");
ret = lua_pcall(L, 0, 0, 0);
if(ret) {
const char* err_str = luaL_checkstring(L, -1);
switch(ret) {
case LUA_ERRRUN: fprintf(stderr, "lua_pcall() runtime error: %s\n", err_str); break;
case LUA_ERRMEM: fprintf(stderr, "lua_pcall() malloc error: %s\n", err_str); break;
case LUA_ERRERR: fprintf(stderr, "lua_pcall() error at error handler function: %s\n", err_str); break;
}
return -1;
}
return 0;
}
int call_main_loop(lua_State* L, const char* filename)
{
lua_getglobal(L, LUA_MAIN_LOOP_FUNC);
if(!lua_isfunction(L, -1)) {
fprintf(stderr, "there is no function '%s' at file '%s'\n", LUA_MAIN_LOOP_FUNC, filename);
return -1;
};
int ret = lua_pcall(L, 0, 1, 0);
if(ret) {
const char* err_str = luaL_checkstring(L, -1);
switch(ret) {
case LUA_ERRRUN: fprintf(stderr, "lua_pcall(%s:%s) runtime error: %s\n", filename, LUA_MAIN_LOOP_FUNC, err_str); break;
case LUA_ERRMEM: fprintf(stderr, "lua_pcall(%s:%s) malloc error: %s\n", filename, LUA_MAIN_LOOP_FUNC, err_str); break;
case LUA_ERRERR: fprintf(stderr, "lua_pcall(%s:%s) error at error handler function: %s\n", filename, LUA_MAIN_LOOP_FUNC, err_str); break;
}
return -1;
}
ret = lua_tointeger(L, 1);
return ret;
}
void* main_loop(void* file)
{
if(!file)
pthread_exit(NULL);
lua_State *L;
L = luaL_newstate();
if(!L) {
fprintf(stderr, "error creating lua state\n");
pthread_exit(NULL);
}
int ret = init_main_loop(L, (char*)file);
if(!ret)
ret = call_main_loop(L, (char*)file);
printf("%s returned with %d\n", (char*)file, ret);
lua_close(L);
/* this should bring down the other thread as well
at least this is true for the tcp-server thread */
pipe_close();
pthread_exit(NULL);
}
int main(int argc, char* argv[])
{
printf("starting nopsyncd...\n");
pthread_t qlistener, tcpserver;
int ret = pipe_init();
if(ret) {
fprintf(stderr, "Error creating pipe: %s\n", strerror(errno));
return 1;
}
ret = pthread_create(&qlistener, NULL, main_loop, QLISTENER);
if(ret) {
fprintf(stderr, "Error creating qlistener thread (code: %d)\n", ret);
return 1;
}
pthread_detach(qlistener); /* can't kill this thread so don't join to it */
ret = pthread_create(&tcpserver, NULL, main_loop, TCPSERVER);
if(ret) {
fprintf(stderr, "Error creating tcpserver thread (code: %d)\n", ret);
return 1;
}
/* this thread can't be cancelled so don't wait for it */
/* pthread_join(qlistener, NULL); */
pthread_join(tcpserver, NULL);
printf("stopping nopsyncd.\n");
return 0;
}
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