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/* Prosody IM v0.1
-- Copyright (C) 2008 Matthew Wild
-- Copyright (C) 2008 Waqas Hussain
--
-- This program 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 2
-- of the License, or (at your option) any later version.
--
-- This program 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 this program; if not, write to the Free Software
-- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/* pposix.c
POSIX support functions for Lua
*/
#include <stdlib.h>
#include <unistd.h>
#include <libgen.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "lua.h"
static int daemonize(lua_State *L)
{
pid_t pid;
if ( getppid() == 1 )
{
lua_pushboolean(L, 0);
lua_pushstring(L, "already-daemonized");
return 2;
}
/* Attempt initial fork */
if((pid = fork()) < 0)
{
/* Forking failed */
lua_pushboolean(L, 0);
lua_pushstring(L, "fork-failed");
return 2;
}
else if(pid != 0)
{
/* We are the parent process */
lua_pushboolean(L, 1);
lua_pushnumber(L, pid);
return 2;
}
/* and we are the child process */
if(setsid() == -1)
{
/* We failed to become session leader */
/* (we probably already were) */
lua_pushboolean(L, 0);
lua_pushstring(L, "setsid-failed");
return 2;
}
/* Close stdin, stdout, stderr */
/* close(0);
close(1);
close(2);
*/
/* Final fork, use it wisely */
if(fork())
exit(0);
/* Show's over, let's continue */
lua_pushboolean(L, 1);
lua_pushnil(L);
return 2;
}
int luaopen_util_pposix(lua_State *L)
{
lua_newtable(L);
lua_pushcfunction(L, daemonize);
lua_setfield(L, -2, "daemonize");
return 1;
};
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