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/*
* rhctl
*
* Copyright (C) 2009-2014 Christian Pointner <equinox@helsinki.at>
*
* This file is part of rhctl.
*
* rhctl 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.
*
* rhctl 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 rhctl. If not, see <http://www.gnu.org/licenses/>.
*/
#include <lua.h>
#include <lauxlib.h>
#include <unistd.h>
#include <sys/socket.h>
#include <errno.h>
#include "datatypes.h"
#include "l_cmd.h"
#include "options.h"
#include "command_queue.h"
#include "client_list.h"
#include "log.h"
#include "utils.h"
int cmd_fd;
read_buffer_t cmd_buffer;
static int l_cmd_getfd(lua_State *L)
{
if(!lua_istable(L, -1))
luaL_error(L, "can't retreive signal fd");
lua_pushliteral(L, "fd");
lua_gettable(L, -2);
return 1;
}
static int l_cmd_dirty(lua_State *L)
{
lua_pushboolean(L, 0);
return 1;
}
static int l_cmd_init(lua_State *L)
{
lua_newtable(L);
lua_pushliteral(L, "fd");
lua_pushinteger(L, cmd_fd);
lua_settable(L, -3);
lua_pushliteral(L, "getfd");
lua_pushcfunction(L, l_cmd_getfd);
lua_settable(L, -3);
lua_pushliteral(L, "dirty");
lua_pushcfunction(L, l_cmd_dirty);
lua_settable(L, -3);
return 1;
}
// gets called by nonblock_recvline for every complete message
static int cmd_recv_data(lua_State* L)
{
int ret = 0;
for(;;) {
ret = recv(cmd_fd, &cmd_buffer.buf[cmd_buffer.offset], 1, 0);
if(!ret)
return 2;
if(ret == -1 && errno == EAGAIN)
return 0;
else if(ret < 0)
break;
if(cmd_buffer.buf[cmd_buffer.offset] == '\n') {
cmd_buffer.buf[cmd_buffer.offset] = 0;
lua_pushstring(L, (char *)(cmd_buffer.buf));
ret = lua_pcall(L, 1, 1, 0);
if(ret) {
const char* err_str = luaL_checkstring(L, -1);
switch(ret) {
case LUA_ERRRUN: log_printf(ERROR, "lua_pcall(cmd_callback) runtime error: %s", err_str); break;
case LUA_ERRMEM: log_printf(ERROR, "lua_pcall(cmd_callback) malloc error: %s", err_str); break;
case LUA_ERRERR: log_printf(ERROR, "lua_pcall(cmd_callback) error at error handler function: %s", err_str); break;
}
return -1;
}
ret = lua_tointeger(L, 1);
cmd_buffer.offset = 0;
break;
}
cmd_buffer.offset++;
if(cmd_buffer.offset >= sizeof(cmd_buffer.buf)) {
log_printf(DEBUG, "string too long cmd_fd");
cmd_buffer.offset = 0;
return 0;
}
}
return ret;
}
static int l_cmd_recv_data(lua_State* L)
{
int ret = cmd_recv_data(L);
lua_pushinteger(L, ret);
return 1;
}
static int l_cmd_send_string(lua_State* L)
{
int ret = send_string(cmd_fd, luaL_checkstring(L,1));
if (ret > 0)
do {
ret = write(cmd_fd, "\n", 1);
} while(!ret || (ret == -1 && errno == EINTR));
if(ret > 0)
ret = 0;
lua_pushinteger(L, ret);
return 1;
}
static const struct luaL_reg cmd_funcs [] = {
{ "init", l_cmd_init },
{ "recv_data", l_cmd_recv_data },
{ "send_string", l_cmd_send_string },
{ NULL, NULL }
};
LUALIB_API int luaopen_cmd(lua_State *L)
{
luaL_register(L, LUA_CMDLIBNAME, cmd_funcs);
return 1;
}
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